JP3522943B2 - Rotating electric machine rotor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor of a rotary electric machine such as a water turbine generator.

[0002]

2. Description of the Related Art Conventional rotors of rotary electric machines such as turbine generators have been developed with various rotor structures in order to cope with the increase in capacity, and the shapes of these rotors have been enlarged. Figure 2
9 to 32 show a rotor of a conventional rotary electric machine disclosed in, for example, Japanese Patent Publication No. 6-7734. In each of these drawings, 1 is a rotary shaft, 2 is fixed to the rotary shaft 1 by welding, and the rotor is arranged in the circumferential direction. A plurality of spiders are arranged and the strength bone portion 2a
And a support arm 2b and a support plate 2c.
A key groove 2d is formed on the outer peripheral surface of the support arm 2b of the spider 2. Reference numeral 3 denotes a rim arranged on the outer peripheral side of the spider 2. The rim 3 has a radial rim duct 5 formed by arranging a rim duct piece 4 between a plurality of circular rim bodies 3a divided in the axial direction. And axially stacked, a key groove 3b corresponding to the key groove 2d formed on the support arm 2b is formed on the inner peripheral surface portion, a dovetail groove 3c is formed on the outer peripheral surface portion, and the key 6 forms the outer peripheral side of the spider 2. Is detachably coupled to. 3d is a rim fixing hole formed in the rim 3, and the rim 3 is fixed by the bolt 7. Reference numeral 8 denotes a rotor core arranged on the outer peripheral side of the rim 3. The rotor core 8 is formed by stacking fan-shaped core segments 8a made of thin steel plates in the circumferential direction and the axial direction to form a core layer body 8b. Axially laminated with a core duct 10 in the radial direction formed by arranging the core duct pieces 9 between the layered bodies 8b,
A dovetail 8c to be inserted into a dovetail groove 3c formed in the rim 3 is formed on the inner peripheral surface portion, a plurality of slots 8d are formed on the outer peripheral surface portion, and the key 11 is detachably coupled to the outer peripheral side of the rim 3. Reference numeral 8e is a core fixing hole formed in the rotor core 8, and the rotor core 8 is fixed by the bolt 12. The inner end of the core duct 10 and the outer end of the rim duct 5 are arranged so as to communicate with each other. Reference numeral 13 denotes a rotor coil inserted into a slot 8d formed on the outer peripheral surface of the rotor core 8 and fixed to the rotor core 8 by a rotor wedge (not shown). Reference numeral 14 denotes a support base arranged on the inner peripheral side of the coil end portion 13a of the rotor coil 13 for supporting the centrifugal force of the coil end portion 13a. For example, a bolt 12 is inserted therethrough and a nut (not shown) is used to rotate the rotor. It is fixed together with the core 8. Reference numeral 15 denotes a support tool which is arranged on the outer peripheral side of the coil end portion 13a of the rotor coil 13 and which supports the centrifugal force of the coil end portion 13a, and is constituted by a bind wire, a circular pipe, a bolt and the like.

Next, the operation will be described. When the rotor rotates, cooling air flows in between each force frame portion 2a of the spider 2 as indicated by an arrow. The cooling air that has flowed in between the force-supporting portions 2a of the spider 2 flows between the support arms 2b and flows into the rim duct 5 between the rim bodies 3a of the rim 3, and then passes through the rim duct 5 from the outer end of the rim duct 5 to the core duct. A rotor (not shown) flows into the core duct 10 through the inner end of the rotor 10, cools the rotor coil 13 inserted into the slot 8d of the rotor core 8 and flows out of the rotor from the outer end of the core duct 10. Flows into the side.

By the way, as the capacity of the rotating electric machine increases, the shape of the rotor increases, so that the spider 2 and the rim 3 are interposed between the rotary shaft 1 and the rotor core 8, and the rim 3
Is detachably keyed to the spider 2, and the rotor core 8
Is detachably dovetailed to the rim 3, and the rim 3 and the rotor core 8 can be transported separately.

[0005]

However, the rotor of the above-described conventional rotary electric machine includes the rotary shaft 1 and the spider 2.
Since it is composed of the rim 3 and the rotor core 8, the number of the constituents is large, and it takes a lot of labor and time for manufacturing and assembling. Moreover, the rim 3 and the rotor core 8 can be separately removed and transported, but the spider 2 is fixed to the rotary shaft 1 by welding, and therefore cannot be transported separately.

When the rotor becomes larger, the rim 3
However, there were problems that the diameter of the rim became large, the production limit of the rim material was exceeded, and transportation was restricted.

The rim 3 of the rotor is often made of a relatively thick steel plate having a thickness of, for example, about 30 to 200 mm.
Since both sides are machined, the machining accuracy is high and it is easy to provide the rim duct 5 at a predetermined position. However, the fan-shaped core segment 8a of the rotor core 8 has, for example, 0.5 to 2 m.
A thin steel plate of about m is often used, has a crown of about several percent, and has a non-uniform plate thickness. Therefore, in order to stack the rotor cores 8, a relatively thin padding is filled between the fan-shaped core segments 8a to correct the crown shape. When the fan-shaped core segments 8a are stacked, the space factor of the rotor core 8 is increased by pushing with a press or tightening with bolts 12 every time a certain thickness is stacked. At that time, it is necessary to use a skillful technique to align the position of the core duct 10 with a predetermined position over the entire axial length of the rotor, for example, about 2 to 4 m. It is extremely difficult to stack the rotor cores 8 so that the outer ends of the plurality of rim ducts 5 having a width of about 10 mm communicate with each other over the entire length of the rotor. Rim duct 5 and core duct 10
However, it was difficult to locally ventilate the cooling air from the inside of the rotor, and it was difficult to obtain sufficient cooling characteristics.

The present invention has been made in order to solve the above problems, and by reducing the number of rotor components, manufacturing and assembling do not require much labor and time. The purpose is to obtain a rotor of a rotating electric machine that is excellent in terms of transportation.

Another object of the present invention is to obtain a rotor of a rotating electric machine which is not subject to the manufacturing limit of the rim material or the limitation of transportation by dividing and stacking the rims.

Another object of the present invention is to obtain a rotor of a rotary electric machine which can improve cooling characteristics by a structure which facilitates communication between the rim duct and the core duct.

[0011]

According to a first aspect of the present invention, there is provided a rotor for a rotary electric machine according to a first aspect of the present invention. A plurality of leg portions extending in the circumferential direction on the peripheral surface side are provided in the circumferential direction, a plurality of dovetail grooves are formed on the outer peripheral surface side, and a spider rim in which the leg portions are detachably coupled to the rotary shaft, A radial rim duct formed between each rim body of this spider rim and a core layer body arranged on the outer peripheral side of the spider rim and axially divided into a plurality of layers are laminated and formed on the inner peripheral surface side of the spider rim. A plurality of dovetails to be inserted into the dovetail grooves are provided, a plurality of slots for accommodating the rotor coils are formed on the outer peripheral surface side, the dovetails are detachably coupled to the spider rim, and each core of the rotor cores. Formed between layers The is provided with a radially of core duct.

According to a second aspect of the present invention, the rim body of the spider rim divided into a plurality of parts in the axial direction according to the first aspect is
It is configured such that a plurality of divided rim body pieces obtained by dividing a thin steel plate into a plurality of pieces in the circumferential direction are arranged in a circle in the circumferential direction and a plurality of pieces are laminated in the axial direction.

According to a third aspect of the present invention, the outer peripheral surface is arranged on the outer peripheral side of the rotating shaft, is divided into a plurality of layers in the axial direction and is laminated, and the inner peripheral surface side is engaged with the rotating shaft and detachably coupled to the outer peripheral surface. A rim having a plurality of dovetail grooves formed on the side, cooling air introduction holes formed in each of the rims, a radial rim duct formed between the rims, and a rim arranged on the outer peripheral side of the rim. A plurality of core layer bodies that are divided in the direction are stacked, a plurality of dovetails that are inserted into the dovetail grooves formed on the rim are provided on the inner peripheral surface side, and a plurality of slots that store the rotor coil are provided on the outer peripheral surface side. A rotor core is formed and a dovetail is detachably coupled to the rim, and a radial core duct is formed between core layer bodies of the rotor core.

According to a fourth aspect of the present invention, the rim, which is divided into a plurality of layers in the axial direction in the third aspect and is laminated, is a divided rim body piece formed by dividing a thin steel plate into a plurality of pieces in the circumferential direction. It is configured by arranging in a circular shape in a direction and by stacking a plurality of layers in the axial direction.

According to a fifth aspect of the present invention, the outer peripheral surface is arranged on the outer peripheral side of the rotary shaft, is divided into a plurality of layers in the axial direction and is laminated, and the inner peripheral surface side is engaged with the rotary shaft and detachably coupled to the outer peripheral surface. A rim having a plurality of dovetail grooves formed on each side, a plurality of cooling air introduction holes formed on each rim and having a small rotating shaft side and a large dovetail groove side extending in the radial direction, and a cooling air introduction hole formed on each rim A plurality of dovetails that are inserted between the legs and the core layers that are arranged on the outer peripheral side of the rim and are axially divided into a plurality of layers are laminated on the inner peripheral surface side of each rim. A plurality of slots are provided on the outer peripheral surface side for accommodating the rotor coil, and a dovetail is detachably coupled to the rim, and the rotor core is formed between the core layers of the rotor core and the radial direction. And a core duct.

According to a sixth aspect of the present invention, the leg portion is disposed on the outer peripheral side of the rotary shaft, is divided into a plurality of layers in the axial direction and is laminated, and the leg portion extending to the rotary shaft side on the inner peripheral surface side is circumferentially formed. A plurality of slots are formed on the outer peripheral surface side to accommodate the rotor coils, and the leg portions are detachably connected to the rotating shaft, and the rotor yoke body is formed between each rotor yoke body. And a ventilation duct in the radial direction.

According to a seventh aspect of the present invention, the rotary shaft is arranged on the outer peripheral side, is divided into a plurality of layers in the axial direction and is laminated, and the inner peripheral surface side is engaged with the rotary shaft and is detachably coupled to the outer peripheral surface. The rotor yoke body having a plurality of slots for accommodating the rotor coils on the side, the cooling air introduction holes formed in the rotor yoke body, and the radius formed between the rotor yoke bodies. Direction ventilation ducts.

According to the present invention, the rotating shaft is arranged on the outer peripheral side, the inner peripheral surface side is coupled to the rotating shaft, and the outer peripheral surface side is provided with a plurality of arm portions extending radially outward. A spider and a core layer body, which is arranged on the outer peripheral side of the spider and is divided into a plurality of pieces in the axial direction, are laminated, and a plurality of leg portions extending on the inner peripheral surface side so as to face the arm portion of the spider are formed. The radius formed between the rotor core, the legs of which are detachably coupled to the arm of the spider, and the outer peripheral surface of which has a plurality of slots for accommodating the rotor coil, and the core layers of the rotor core. Direction core duct and a cooling air introduction space formed between adjacent leg portions of the rotor core and adjacent arm portions of the spider.

According to a ninth aspect of the present invention, the rim is arranged on the outer peripheral side of the rotary shaft, the inner peripheral surface side of which is joined to the rotary shaft, and the rim is arranged on the outer peripheral side of the rim and divided into a plurality of parts in the axial direction. The core layer body is laminated, and a plurality of leg portions extending to the outer peripheral side of the rim are formed on the inner peripheral surface side, the leg portions are detachably coupled to the outer peripheral portion of the rim, and the rotor is arranged on the outer peripheral surface side. Between a rotor core having a plurality of slots for accommodating coils, a radial core duct formed between the core layers of the rotor core, and adjacent legs of the rotor core and the outer periphery of the rim. And a cooling air introduction space formed in the.

According to a tenth aspect of the present invention, in the eighth or ninth aspect, the core layer body of the rotor core is formed by dividing a thin steel plate into a plurality of circumferentially-divided core pieces into a circular shape in the circumferential direction. And a plurality of layers are laminated in the axial direction.

According to the eleventh aspect of the present invention, a communicating groove is formed in at least one of the spider rim or the rim and the rotor core which face each other in any of the first to fifth aspects.

[0022]

DETAILED DESCRIPTION OF THE INVENTION

Embodiment 1. Hereinafter, a first embodiment of the present invention will be described with reference to FIG.
A description will be given based on FIG. In FIG. 1 and FIG. 2, reference numeral 1 is a rotary shaft, and for example, an engaging portion 1a protruding outward is formed. 16 is arranged on the outer peripheral side of the rotary shaft 1, and a rim body 16a of one circle divided into a plurality in the axial direction is laminated,
A plurality of leg portions 16b extending toward the rotary shaft 1 are radially provided on the inner peripheral surface side, and the dovetail groove 1 is provided on the outer peripheral surface side.
A plurality of 6c are formed, the leg portion 16b has an engaging portion 16d that engages with the engaging portion 1a of the rotary shaft 1, and the key 17 is inserted between the engaging portions so that it can be detached. It is a combined spider rim. Note that, for example, the inner peripheral surface side of the leg portion 16b of the spider rim 16 is in contact with the outer peripheral surface of the rotating shaft 1. Reference numeral 18 denotes a rim body 1 of a circle that is divided into a plurality of parts in the axial direction.
Radial rim ducts formed by arranging rim duct pieces 19 between 6a, and 20 are rim bodies 16 of the spider rim 16.
A bolt for fixing a, 21 is a rotor core arranged on the outer peripheral side of the spider rim 16, and the rotor core 21 is a core layer body 21b formed by stacking fan-shaped core segments 21a made of thin steel plates in the circumferential direction and the axial direction. Of the dovetail groove 1 formed in the spider rim 16 on the inner peripheral surface of the core layer body 21b by axially stacking the core duct 23 in the radial direction with the core duct 23 formed therebetween.
A dovetail 21c to be inserted into 6c is formed, a plurality of slots 21d are formed on the outer peripheral surface portion, and the key 24 is detachably coupled to the outer peripheral side of the spider rim 16.
Reference numeral 25 is a bolt for fixing each core layer body 21b of the rotor core 21. The inner end of the core duct 23 and the outer end of the rim duct 18 are arranged so as to communicate with each other.
The cooling air that has flowed in between the leg portions 16b of the spider rim 16 from both end sides of 6 flows through each rim duct 18, further flows through the core duct 23, and flows out of the rotor. Reference numeral 26 denotes a rotor coil inserted into a slot 21d formed on the outer peripheral surface of the rotor core 21, and fixed to the rotor core 21 by a rotor wedge (not shown).
Reference numeral 27 denotes a support base that is arranged on the inner peripheral side of the coil end portion 26a of the rotor coil 26 and supports the centrifugal force of the coil end portion 26a. For example, a bolt 25 is inserted and a nut (not shown) is used to rotate the rotor. It is fixed together with the core 21. Reference numeral 28 denotes a supporting member that is arranged on the outer peripheral side of the coil end portion 26a of the rotor coil 26 and that supports the centrifugal force of the coil end portion 26a, and is composed of a bind wire, a circular pipe, a bolt, and the like.

Next, the operation will be described. When the rotor rotates, cooling air flows in between the leg portions 16b of the spider rim 16 as indicated by arrows. The cooling air flowing between the leg portions 16b of the spider rim 16 becomes
Of the rotor core 21 through the inner ends of the core ducts 23 from the outer ends of the rim ducts 18 to the slots 21d of the rotor core 21. The rotor coil 26 inserted into the core is cooled, flows out from the outer end of each core duct 23 to the outside of the rotor, and flows into the stator side (not shown).

By the way, the rim body 16 of the spider rim 16
Legs 16 extending radially toward the rotary shaft 1 on the inner peripheral surface side of a
b-By providing a plurality of the engaging portions 16d and 1a of the rim body 16a with the leg portions 16b of the rim body 16a, the rim body 16a and the rotary shaft 1 are detachably fixed by the key 17. The leg portion 16b of the rim body 16a is not detachably fixed to the rotary shaft 1 by welding like the spider 2 in the above-described conventional device, but the leg 16b of the rim body 16a is detachably connected by the key 17, and the rim body of the spider rim 16 from the rotary shaft 1 is attached. 16a can be detached and transported.

Further, the rim body 16a of the spider rim 16 has a leg portion 16b made of an integral structure, and the spider 2 and the rim 3 have different structures and are connected by a key as in the conventional device described above. Since there is no such component, it is possible to reduce the number of constituent parts by half and obtain an economical device, and also to eliminate the key groove on the inner peripheral surface of the rim 3 as in the conventional case. It is possible to obtain a highly reliable device without the circumferential stress on the inner peripheral surface of the device being amplified by stress concentration in the key groove portion.

Further, the dovetail 21c of the rotor core 21 is coupled to the dovetail groove 16c on the outer peripheral surface side of the rim body 16a of the spider rim 16, and the rim body 16a and the rotor core 2 are joined together.
Since it has a structure in which 1 and 1 are detachably fixed, the rotating shaft 1, each rim body 16a of the spider rim 16, and the rotating shaft core 21 can be separately transported and assembled on site.

Embodiment 2. Next, a second embodiment of the invention will be described with reference to FIGS. Although the rim body 16a of the spider rim 16 is an integral structure having a large plate thickness in the first embodiment described above, in the second embodiment, the rim body 29a of the spider rim 29 is made of thin steel plates and is laminated in plural. It has a leg portion 29b, a dovetail groove 29c, and an engaging portion 29d made of, for example, a key groove, and has the same effect as that of the first embodiment.

Embodiment 3. Next, a third embodiment of the present invention will be described with reference to FIGS. 5, 6 and 7. In the first and second embodiments described above, the rim bodies 16a and 29a of the spider rims 16 and 29 have been described as a single-circle integrated structure. However, in the third embodiment, the rim body 30a of the spider rim 30 is a thin steel plate. A plurality of divided rim body pieces 30e and 30f arranged in the circumferential direction are arranged in a circular shape and are laminated in the axial direction, and are composed of a leg portion 30b, a dovetail groove 30c, for example, a key groove. It has a joint 30d.

In this third embodiment, the spider rim 3
In order to form the rim body 30a of 0, first the divided rim body piece 3
0e are arranged in a circle, the divided rim body pieces 30f are arranged in a circle, and the divided rim body pieces 30e and 30f are alternately laminated in the axial direction. In this way, the size of the material that can be used to form the divided rim body pieces 30e, 30f is sufficient, and in order to form the rim bodies 16a, 29a of the one-piece integrated structure as in the first and second embodiments described above. The material does not become extremely large, the yield of the material is improved, and the economy is improved. The shape of the divided rim body pieces is not limited to that of the third embodiment, and it goes without saying that the present invention extends to various shapes of the divided rim body pieces.

Regarding the improvement of the yield as described above,
This will be described with reference to FIGS. 8 and 9. In FIG. 8, material 3
The remaining portion 31a after forming the rim body 29 of the integral structure of 1 to 1 circle is shown by hatching. FIG. 9 shows, by hatching, the remaining portion 31b after the divided rim body pieces 30e and 30f formed by dividing a thin steel plate into a plurality of pieces from the material 31 in the circumferential direction are formed. Therefore, the yield of the one-dot chain line portion shown in FIG. 9 is improved.

Fourth Embodiment The fourth embodiment of the present invention will be described with reference to FIGS. In these drawings, 1 is a rotary shaft, 1a is an engaging portion, 17 is a key, 21 is a rotor core, 21a is a fan-shaped core segment, 21b is a core layer body, 21c is a dovetail, 21d is a slot, and 22 is a core duct piece. , 23 is a core duct, 24 is a key, 25 is a bolt, 26 is a rotor coil, 26a is a rotor coil 2
6 is a coil end portion, 27 is a support base, and 28 is a support tool. Reference numeral 32 denotes a circular rim that is arranged on the outer peripheral side of the rotary shaft 1 and is divided into a plurality of layers in the axial direction and laminated, and has an inner peripheral surface 32a.
Is in contact with the outer peripheral surface of the rotating shaft 1, and the inner peripheral surface 32a thereof engages with the engaging portion 1a of the rotating shaft 1a.
Is formed, and the dovetail 2 of the rotor core 21 is formed on the outer peripheral surface side.
A plurality of dovetail grooves 32c that engage with 1c are formed. Reference numeral 33 denotes a plurality of cooling air introduction holes formed in each rim 32 of one circle which is divided into a plurality of layers in the axial direction and laminated, 34 denotes a radial rim duct formed by arranging rim duct pieces 35 between the rims 32, 36 is a bolt for fixing each rim 32. The inner peripheral surface 32a of each rim 32 is in contact with the outer peripheral surface of the rotary shaft 1, the engaging portion 1a of the rotary shaft 1 is engaged with the engaging portion 32b of the rim 32, and the rim 32 is attached and detached by the key 17. Are combined as possible. The dovetail groove 32c of each rim 32 is engaged with the dovetail 21c of the rotor core 21 and is detachably coupled with the key 24.

Next, the operation will be described. Each rim 32
Since the cooling air introduction hole 33 is provided in the cooling air introduction hole 33, the cooling air is introduced by the rotation of the rotor as shown by the arrow.
Flow into. The cooling air that has flowed into the rim 32 through the cooling air introduction holes 33 is distributed to the rim ducts 34, passes through the rim ducts 34, passes from the outer ends of the rim ducts 34 to the inner ends of the core ducts 23, and then the core ducts 23. Inside, the rotor coil 26 inserted into the slot 21d of the rotor core 21 is cooled, flows out from the outer end of each core duct 23 to the outside of the rotor, and flows into the stator side (not shown). As described above, the cooling air flows radially outward from the inner peripheral surface side of the rotor, and the rotor can be cooled from the inside.

By the way, in the fourth embodiment,
The inner peripheral surface 32a of each rim 32 is brought into contact with the outer peripheral surface of the rotary shaft 1, the mutual engaging portions 32a, 1a are engaged with each other and are detachably coupled with the key 17, and each rim 32 has a cooling air introduction hole. Three
By forming 3, the spider can be omitted, the number of parts can be reduced, and each rim 32
In the case where the rim 32 is manufactured from a circular plate, the center portion of the rim 32 can be effectively used, the yield of the material can be improved, and the cost is more excellent than that of each of the above embodiments. Becomes

Needless to say, if the cooling air introduction hole 33 is a round hole as shown in FIG. 11, it is easy to process and can be manufactured at low cost, and the rim stress can be reduced by devising the shape.

Embodiment 5. Next, a fifth embodiment of the invention will be described with reference to FIGS. In the fourth embodiment described above, the case where the rim 32 is an integrated structure having a large plate thickness is described, but in the fifth embodiment,
The rim 37 is formed by laminating a plurality of thin steel plates and has a dovetail groove 37c on the outer peripheral surface side and an engaging portion 37b formed of, for example, a key groove on the inner peripheral surface 37a side. Has the same effect.

Sixth Embodiment Next, a sixth embodiment of the invention will be described with reference to FIG. In the above-described Embodiments 4 and 5, the case where the rims 32 and 37 are a one-circle integrated structure has been described, but in Embodiment 6, the rim 38 divides the thin steel plate into a plurality of portions in the circumferential direction. The divided rim body pieces 38a, 38b are formed in a circular shape and are laminated in the axial direction, and have a dovetail groove 38c, for example, an engaging portion 38d formed of a key groove. Each of the divided rim body pieces 38a and 38b is provided with, for example, two cooling air introduction holes 33.

In the sixth embodiment, in order to form the rim 38, first, the divided rim body pieces 38a are arranged in a circle, and further the divided rim body pieces 38b are arranged in a circle to form the divided rim body pieces. It can be formed by alternately laminating a plurality of 38a and 38b in the axial direction. Thus, the divided rim body piece 38
The size of the material that can be used to form the a and 38b may be any, and as in the above-described fourth and fifth embodiments, the rim 3 of the one-piece integral structure can be formed.
The material does not become extremely large in order to form 2, 37, the yield of the material is improved, and the economy is excellent.

Embodiment 7. The seventh embodiment of the present invention will be described with reference to FIG. In FIG. 15, 1 is a rotating shaft, 1a is an engaging portion, 17 is a key, 21 is a rotor core, 2
1a is a fan-shaped core segment, 21b is a core layer body, 21c
Is a dovetail, 21d is a slot, 22 is a core duct piece, 23 is a core duct, 24 is a key, 25 is a bolt, 2
6 is a rotor coil, 35 is a rim duct piece forming a radial rim duct 34, 36 is a bolt, 39 is a rotating shaft 1
Is a circular rim that is arranged on the outer peripheral side of the shaft and is divided into a plurality of layers in the axial direction and laminated, and the inner peripheral surface 39a is in contact with the outer peripheral surface of the rotary shaft 1 and rotates on the inner peripheral surface 39a. An engaging portion 39b that engages with the engaging portion 1a of the shaft 1 is formed, and a plurality of dovetail grooves 39c that engage with the dovetail 21c of the rotor core 21 are formed on the outer peripheral surface side. A plurality of 40 are formed on each rim 39 of one circle which is divided into a plurality of layers in the axial direction and laminated, a cooling air introduction hole having a small rotation shaft 1 side and a large dovetail groove 39c side extending in the radial direction, 41 is each rim 39. The leg portions are provided between the cooling air introduction holes 40 formed in the above. The inner peripheral surface 39a of each rim 39 has the rotary shaft 1
Is engaged with the engaging portion 1a of the rotary shaft 1, and the engaging portion 39b of each rim 39 is engaged with the outer peripheral surface of the rotary shaft 1. Further, the dovetail 21c of the rotor core 21 is engaged with the dovetail groove 39c of each rim 39, and is detachably coupled with the key 24.

Next, the operation will be described. Each rim 39
Since a cooling air introduction hole 40 is provided on the side of which the rotation shaft 1 side is small and the dovetail groove 39c side is large and extends in the radial direction, the cooling air flows into the cooling air introduction hole 40 by the rotation of the rotor. The cooling air that has flowed into the rim 39 through the cooling air introduction hole 40 is distributed to the rim ducts 34, passes through the rim ducts 34, and passes from the outer ends of the rim ducts 34 to the inner ends of the core ducts 23 and the core ducts 23. Inside, the rotor coil 26 inserted into the slot 21d of the rotor core 21 is cooled, flows out from the outer end of each core duct 23 to the outside of the rotor, and flows into the stator side (not shown). As described above, the cooling air flows radially outward from the inner peripheral surface side of the rotor, and the rotor can be cooled from the inside.

By the way, in the seventh embodiment,
The inner peripheral surface 39a of each rim 39 is brought into contact with the outer peripheral surface of the rotating shaft 1, the mutual engaging portions 39a, 1a are engaged with each other and are detachably coupled with the key 17, and the cooling air introducing hole is provided in each rim 39. Four
By forming 0, the spider can be omitted, the number of parts can be reduced, and each rim 39
In the case of manufacturing from a circular plate, the central portion of the rim 39 can be effectively used, the yield of the material can be improved, and the economy can be improved as in the fifth and sixth embodiments. It will be excellent. Further, the leg portions 41 between the cooling air introduction holes 40 can exhibit the same function as that of the spider 2 of the conventional device described above, and a rotor having stable strength can be obtained with a simple configuration.

Embodiment 8. The eighth embodiment of the present invention will be described with reference to FIGS. In these drawings, 1 is a rotary shaft, 1a is a plurality of engaging portions, 17
Is a key, 26 is a rotor coil, 26a is a rotor coil 2
6, coil end portion 27, support base 27, support tool 4
2 is arranged on the outer peripheral side of the rotary shaft 1, is divided into a plurality of layers in the axial direction and is laminated, and a plurality of leg portions 42a extending to the inner peripheral surface side are provided in the circumferential direction, and the rotor is provided on the outer peripheral surface side. A plurality of slots 42b for accommodating the coils 26 are formed, and each leg 42 is formed.
a is a rotor yoke body that is detachably coupled to the rotary shaft 1, the tip of each leg 42a is in contact with the outer peripheral surface of the rotary shaft 1, and the tip of each leg 42a is Engaging portions 42c that engage with the respective engaging portions 1a of the rotating shaft 1 are formed. In addition, in each rotor yoke body 42, the tip end of each leg portion 42a thereof is brought into contact with the outer peripheral surface of the rotary shaft 1, and the engagement portion 1a of the rotary shaft 1 is engaged with each rotor yoke body 42. The mating portion 42c is engaged and is detachably coupled by the key 17. Reference numeral 43 denotes a cooling air introduction space formed between the leg portions 42a of the rotor yoke bodies 42, and 44 denotes a duct piece 4 between the rotor yoke bodies 42.
Radial ventilation ducts formed by arranging 5, 46
Numeral 7 is a bolt for fixing each rotor yoke 42.

In addition, the figure shows the rotor yoke 42 as an example.
Is formed by arranging segment-shaped split yoke pieces 42d, 42e, which are formed by dividing a plurality in the circumferential direction, in a circular shape and by stacking a plurality of layers in the axial direction. First, the split yoke pieces 42d are arranged in a circular shape. Further, the rotor yoke body 42 can be formed by arranging the split yoke pieces 42e in a circular shape and alternately stacking a plurality of the split yoke pieces 42d and 42e in the axial direction.

Next, the operation will be described. When the rotor rotates, cooling air flows into the cooling air introduction space 43 formed between the leg portions 42a of the rotor yoke body 42 as indicated by the arrow. The cooling air that has flowed into the cooling air introduction space 43 between the legs 42 a of the rotor yoke 42 is cooled by the rotor yoke 42.
It flows into the ventilation ducts 44 formed in the radial direction, passes through the ventilation ducts 44, and is inserted into the slots 4 of the rotor yoke 42.
The rotor coil 26 attached to 2b is cooled, flows out of the rotor from the outer end of each ventilation duct 44, and flows into the stator side (not shown).

By the way, in the eighth embodiment,
The rotor yoke body 42 into which the rotor coil 26 is inserted is detachably coupled to the rotary shaft 1, and the detachable coupling is one place instead of two as in the above-described embodiments. As a result, the number of components can be significantly reduced, the detachable connection can be reduced to half, and a more economical device can be obtained.

Further, the leg portion 4 is provided on the inner peripheral portion of the rotor yoke 42.
2a is provided and the inner peripheral surface of the rotor yoke body 42 and the leg portion 42a are connected by a smooth curve, so that the rotor yoke body 42
The stress concentration in the inner peripheral part of can be kept relatively small,
Even if the rim is not provided, the circumferential stress in the inner peripheral portion of the rotor yoke body 42 can be suppressed to be small.

Further, the rotor yoke 42 is a split yoke piece 42.
Since there is a segment formed by d and 42e, there is no problem in transportation. Further, since a large rotor can be obtained without using a rim, the number of parts can be reduced and the assembling can be facilitated.

Ninth Embodiment The ninth embodiment of the present invention will be described with reference to FIG. In FIG. 18, 1 is a rotating shaft, 1 a is a plurality of engaging portions, 17 is a key, 26
Is a rotor coil, 48 is arranged on the outer peripheral side of the rotating shaft 1,
A plurality of axially divided and stacked layers are formed on the inner peripheral surface 48a of which engaging portions 48b that engage with the engaging portions 1a of the rotary shaft 1 are formed. Engagement part 1a
Is a rotor yoke body that is engaged with and is detachably coupled with each other, and has a plurality of slots 48c for accommodating the rotor coil 26 formed on the outer peripheral surface side, and each inner peripheral surface side 48a is the outer peripheral surface of the rotating shaft 1. Is in contact with. Each rotor yoke 48 has its inner peripheral surface side 48a abutted against the outer peripheral surface of the rotating shaft 1, and each engaging portion 1a of the rotating shaft 1 is engaged with each rotor yoke 48. The portion 48b is engaged and is detachably coupled with the key 17. Reference numeral 49 is a cooling air introduction hole formed in each rotor yoke 48, for example, in the shape of a round hole, and 50 is a radial ventilation duct formed by arranging duct pieces 51 and 52 between the rotor yokes 48. , 53 are bolts for fixing each rotor yoke 48.

Further, the drawing shows, as an example, the rotor yoke 48.
Is formed by arranging segment-shaped split yoke pieces 48d, 48e, which are formed by dividing the split circumferential yoke into a plurality of pieces, in a circular shape and by stacking a plurality of layers in the axial direction. First, the split yoke pieces 48d are arranged in a circular shape. The rotor yoke body 48 can be formed by further arranging the split yoke pieces 48e in a circular shape and alternately stacking a plurality of the split yoke pieces 48d and 48e in the axial direction.

Next, the operation will be described. When the rotor rotates, cooling air flows into the cooling air introduction holes 49 formed in the rotor yoke body 48. The cooling air that has flowed into the cooling air introduction hole 49 of the rotor yoke body 48 is
The slots 4 of the rotor yoke 48 flow into the ventilation ducts 50 formed in the radial direction and pass through the ventilation ducts 50.
The rotor coil 26 inserted in 8c is cooled, flows out from the outer end of each ventilation duct 50 to the outside of the rotor, and flows into the stator side (not shown).

By the way, in the ninth embodiment,
The rotor yoke 48 into which the rotor coil 26 is inserted is detachably coupled to the rotating shaft 1, and the detachable coupling is not two as in the first to seventh embodiments described above but one. In addition, the number of components can be significantly reduced, the detachable connection can be reduced to half, and a more economical device can be obtained.

Further, the inner peripheral surface side 48a of the rotor yoke 48
Is abutted on the outer peripheral surface of the rotary shaft 1 and is detachably engaged and coupled thereto, so that a device having a more excellent strength than the above-described eighth embodiment can be obtained.

The rotor yoke 48 is a split yoke piece 48.
There is no problem in transportation because it has a segment shape composed of d and 48e. Further, since a large rotor can be obtained without using a rim, the number of parts can be reduced and the assembling can be facilitated.

Embodiment 10. Embodiment 1 of the present invention
0 will be described with reference to FIG. Embodiment 9 described above
19 describes the case where the cooling air introduction hole 49 is formed in the shape of a round hole, but as shown in FIG. 19, the cooling air introduction hole is small on the rotating shaft 1 side and large on the rotor coil 26 side and extends in the radial direction. It may be 49 or the like, and the same effect is obtained.

Eleventh Embodiment Embodiment 1 of the present invention
1 will be described with reference to FIG. 20, 1 is a rotating shaft, 1a is an engaging portion, 17 is a key, 26 is a rotor coil, 54 is arranged on the outer peripheral side of the rotating shaft 1, and the inner peripheral surface side 54
a is an engaging portion 54 that engages with the engaging portion 1a of the rotary shaft 1, for example
b is formed, and its engaging portion 54b is the engaging portion 1 of the rotary shaft 1.
The spider has a plurality of arm portions 54c that are engaged with and detachably connected to a and that extend outward in the radial direction on the outer peripheral surface side. The arm portion 54c has an engagement portion 54d formed of, for example, a key groove. Has been formed. 55 is arranged on the outer peripheral side of the spider 54, is laminated with a plurality of core layer bodies 55a axially divided, and has a plurality of leg portions 55b extending on the inner peripheral surface side so as to face the arm portions 54c of the spider 54. This is a rotor core that is individually formed, the leg portion 55b is detachably coupled to the arm portion 54c of the spider 54, and a plurality of slots 55c for housing the rotor coil 26 are formed on the outer peripheral surface side. An engaging portion 54d formed of, for example, a key groove facing the engaging portion 54d of the arm portion 54c is formed, and the rotor core 55 is detachably coupled to the spider 54 by the key 56. Reference numeral 57 denotes a radial core duct formed by arranging duct pieces 58 between the core layer bodies 55a of the rotor core 55, and 59 denotes an inner peripheral surface of the rotor core 55 and between adjacent leg portions 55b and between the spider 54. Cooling air introduction space formed in the space between the outer peripheral surface and the adjacent arm portions 54c, and 60 are bolts for fixing each core layer body 55a of the rotor core 55.

Next, the operation will be described. When the rotor rotates, the inner peripheral surface of the rotor core 55 and the adjacent leg 5
5b, the outer peripheral surface of the spider 54, and the adjacent arm 5
The cooling air flows into the cooling air introduction space 59 formed in the space between 4c. The cooling air that has flowed into the cooling air introduction space 59 flows into the radial core ducts 57 formed between the core layer bodies 55 a of the rotor cores 55, passes through the core ducts 57, and is inserted into the slots of the rotor core 55. Each of the core ducts 5 is cooled by cooling the rotor coil 26 inserted in 55c.
It flows out of the rotor from the outer end of 7 and flows into the stator side (not shown).

By the way, in the eleventh embodiment, the rim is not provided unlike the conventional device described above,
The rotor core 55 into which the rotor coil 26 is inserted can be coupled to the spider 54, and the rotor core 55 can be attached.
Can be detached from the spider 54 and transported. Further, since it is not necessary to provide a rim, the number of constituent parts can be significantly reduced, and a more economical device can be obtained.

Twelfth Embodiment Embodiment 1 of the present invention
2 will be described with reference to FIG. In FIG. 21, 1 is a rotating shaft, 1 a is an engaging portion, 17 is a key, 26 is a rotor coil, 55 is a rotor core, 55 a is a core layer body, 55
b is a leg portion, 55c is a slot, and 55d is an engaging portion.
57 is a core duct, 58 is a duct piece, and 60 is a bolt. 61 is disposed on the outer peripheral side of the rotary shaft 1 and is on the inner peripheral surface side 61
a is an engaging portion 61 that engages with the engaging portion 1a of the rotating shaft 1, for example
b is formed, and the engaging portion 61 b is the engaging portion 1 b of the rotating shaft 1.
It is a rim that engages with a and is detachably coupled, and has an engaging portion 61d formed of, for example, a key groove facing the respective engaging portions 55d of the rotor core 55 on the outer peripheral surface side 61c. The rotor core 55 is detachably coupled to the rim 61. Reference numeral 62 is a cooling air introduction space formed in a space between the inner peripheral surface of the rotor core 55 and between the adjacent leg portions 55b and the outer peripheral surface of the rim 61.

Next, the operation will be described. When the rotor rotates, the inner peripheral surface of the rotor core 55 and the adjacent leg 5
The cooling air flows into the cooling air introduction space 62 formed in the space between the 5b and the outer peripheral surface of the rim 61. The cooling air that has flowed into the cooling air introduction space 62 flows into the radial core ducts 57 formed between the core layer bodies 55 a of the rotor core 55, passes through the core ducts 57, and the slots 55 c of the rotor core 55. The rotor coil 26 inserted into the rotor is cooled, flows out of the rotor from the outer end of each core duct 57, and flows into the stator side (not shown).

By the way, in the twelfth embodiment, the rotor core 55 into which the rotor coil 26 is inserted can be coupled to the rim 61 and the rotor core can be rotated without providing a spider unlike the above-described conventional device. Child core 55
Can be detached from the rim 61 and transported.
Further, since it is not necessary to provide a spider, it is possible to significantly reduce the number of constituent parts, and it is possible to obtain a more economical device. Further, in the twelfth embodiment, unlike the above-described eleventh embodiment, the arm portion is not provided and the rim 61 has a ring-shaped simple structure, and the manufacturing is further simplified and the economy is further improved. Will be things.

Further, in the eleventh and twelfth embodiments described above, the case where the spider 54 and the rim 61 are detachably coupled to the rotary shaft 1 has been described, but the spider 54 and the rim 61 are not necessarily detachably coupled. It is needless to say that the above object can be achieved, and the joining means may be joined in a fixed state such as shrink fitting.

Thirteenth Embodiment Next, a thirteenth embodiment of the present invention will be described with reference to FIGS. 22, 23 and 24. In the eleventh and twelfth embodiments described above, the rotor core 5
Although the case where 5 is a one-circle integral structure has been described, in the thirteenth embodiment, the rotor core 55 divides the thin steel plate into a plurality of circumferentially divided core pieces 55e and 55f.
Are arranged in a circle and are laminated in the axial direction, and each has a leg portion 55b, a slot 55c, and an engaging portion 55d formed of, for example, a key groove.

In the thirteenth embodiment, the rotor core 5
In order to form each core layer body 55a of No. 5, first, the split core pieces 55e are arranged in a circular shape, further the split core pieces 55f are arranged in a circular shape, and the split core pieces 55e, 55f are alternately arranged in the axial direction. It can be formed by stacking a plurality of layers. in this way,
The size of the material that can be used to form the split core pieces 55e and 55f is sufficient, and as in the eleventh and twelfth embodiments described above, the material is extremely large in order to form the core layer body 55a of the one-piece integrated structure. Is eliminated, the yield of the material is improved, and the economy is improved. The shape of the split core pieces is not limited to that of the thirteenth embodiment, and it goes without saying that the present invention extends to various shapes of the split core pieces.

Fourteenth Embodiment The fourteenth embodiment of the present invention will be described below with reference to FIGS. 25 and 26. The fourteenth embodiment is an embodiment for improving the cooling characteristic in comparison with the above-described first to seventh embodiments, and a case where the present invention is applied to the first embodiment will be described. In these drawings, 1 is a rotating shaft, 1a is an engaging portion, 16 is a spider rim, 16a is a rim body, 16b is a leg portion, 16c is a dovetail groove, 16d is an engaging portion, 17 is a key, 18 is a rim duct, 19 Is a rim duct piece, 20 is a bolt, 21 is a rotor core, 21a is a fan-shaped core segment, 21b is a core layer body, 21c is a dovetail, and 21d is a slot. 22 is a core duct piece, 23 is a core duct, 24 is a key, 25 is a bolt, and 26 is a rotor coil. Reference numeral 63 denotes a communication groove axially formed on the outer peripheral surface side on the spider rim 16 side, that is, on the outer peripheral surface side between the dovetail grooves 16c of the spider rim 16 facing the inner peripheral surface between the dovetails 21c of the rotor core 21.

Next, the operation will be described. When the rotor rotates, cooling air flows between the legs 16b of the spider rim 16. The cooling air that has flowed in between the leg portions 16b of the spider rim 16 flows into each rim duct 18 between the rim bodies 16a of the spider rim 16, passes through each rim duct 18, and extends from the outer end of each rim duct 18 to the inner end of each core duct 23. Through each core duct 23, cools the rotor coil 26 inserted into the slot 21d of the rotor core 21, and flows out from the outer end of each core duct 23 to the outside of the rotor. Inflow.

By the way, it is difficult to adjust the position of the core duct 23 to a predetermined position over the entire axial length of the rotor, and as shown in FIG. 26, the mutual positions of the rim duct 18 and the core duct 23 are displaced over the entire axial length of the rotor. However, in the fourteenth embodiment, the cooling air flowing through the rim duct 18 is prevented from flowing through the communication groove 63 by the communication groove 63 formed in the outer peripheral surface side on the spider rim 16 side in the axial direction.
Since the cooling air does not flow locally to the core duct 23 because it surely flows into the core duct 23 through the passage, sufficient cooling characteristics can be realized with a simple configuration, and a highly reliable rotor can be obtained. it can. Further, the communication groove 63 can be easily formed on the rim by machining.

The fourteenth embodiment is the same as the first embodiment.
The case of application to the above is described, but the same can be applied to the second and third embodiments described above, and the communication groove 63 and the rim 32.3 are also applied to the fourth to seventh embodiments.
By providing them in 7, 38, and 39, respectively, the same effect as that of the above-described fourteenth embodiment can be obtained.

Fifteenth Embodiment The fifteenth embodiment of the present invention will be described below with reference to FIGS. 27 and 28. In the fourteenth embodiment described above, the case where the communication groove 63 is provided on the outer peripheral surface side of the spider rim or the rim has been described, but in the fifteenth embodiment, 64 is, for example, the inner peripheral surface side of the rotor core 21, That is, the rotor core 21 facing the outer peripheral surface between the dovetail grooves 16c of the spider rim 16
Is a communicating groove formed in the axial direction on the inner peripheral surface side between the dovetails 21c.

In the fifteenth embodiment as well, as shown in FIG. 28, even if the mutual position of the rim duct 18 and the core duct 23 deviates over the entire axial length of the rotor, the rotor core 21 is axially moved to the inner peripheral surface side. By the communication groove 64 formed in the direction, the cooling air flowing through the rim duct 18 surely flows into the core duct 23 through the communication groove 64, so that the cooling air does not locally flow to the core duct 23. Similar to the fourteenth embodiment described above, sufficient cooling characteristics can be realized with a simple configuration, and a highly reliable rotor can be obtained. Further, since the communicating groove 64 can be machined at the same time as the bolt hole, the key groove, the coil slit and the like when the core is punched out, it can be more easily carried out.

[0069]

As described above, according to claim 1 of the present invention, the rim bodies which are arranged on the outer peripheral side of the rotary shaft and are divided into a plurality of parts in the axial direction are laminated, and the rotary shaft is formed on the inner peripheral surface side. A plurality of legs extending in the circumferential direction, a plurality of dovetail grooves are formed on the outer peripheral surface side, and a spider rim in which the legs are detachably coupled to the rotating shaft, and each rim body of the spider rim. A radial rim duct formed between them and a core layer body, which is arranged on the outer peripheral side of the spider rim and is axially divided into a plurality of layers, are stacked and attached to the dovetail groove formed on the inner peripheral surface side of the spider rim. A plurality of dovetails are formed, a plurality of slots for housing the rotor coils are formed on the outer peripheral surface side, and the dovetail is formed between the rotor core detachably connected to the spider rim and each core layer body of the rotor core. Radial coda By providing the spider rim, the spider rim is an integrated structure that combines the spider and the rim, and it is economical, and the spider rim is detachably connected to the rotary shaft. It is possible to remove it and transport it.

According to a second aspect of the present invention, the rim body of the spider rim divided into a plurality of parts in the axial direction in the first aspect is a divided rim body piece obtained by dividing a thin steel plate into a plurality of pieces in the circumferential direction. Are arranged in a circle in the circumferential direction and a plurality of layers are laminated in the axial direction, the yield of the material is improved, and the economy is improved.

According to the third aspect of the present invention, it is arranged on the outer peripheral side of the rotary shaft, is divided into a plurality of layers in the axial direction and is laminated, and the inner peripheral surface side is engaged with the rotary shaft and is detachably coupled. , A rim having a plurality of dovetail grooves formed on the outer peripheral surface side, a plurality of cooling air introduction holes formed on each rim, a radial rim duct formed between the rims, and a rim outer peripheral side A plurality of core layer bodies that are divided in the axial direction are stacked, a plurality of dovetails that are inserted into the dovetail grooves formed in the rim are provided on the inner peripheral surface side, and the rotor coil is housed on the outer peripheral surface side. By providing a rotor core having a plurality of slots and a dovetail detachably coupled to the rim, and a radial core duct formed between core layer bodies of the rotor core, the rim directly rotates the rotary shaft. As it is detachably combined with the spa, Central and rim can be omitted da be effectively improved utilization can yield properties, it becomes excellent in economical efficiency, it is possible to transport and remove the rim from the rotational axis.

According to a fourth aspect of the present invention, the rim, which is divided into a plurality of portions in the axial direction and laminated in the third aspect, is a divided rim piece formed by dividing a thin steel plate into a plurality of portions in the circumferential direction. By arranging in a circular shape in the circumferential direction and laminating a plurality of layers in the axial direction, the yield of the material is improved,
It will be highly economical.

According to the fifth aspect of the present invention, it is arranged on the outer peripheral side of the rotary shaft, is divided into a plurality of layers in the axial direction and is laminated, and the inner peripheral surface side is engaged with the rotary shaft and is detachably coupled. A rim having a plurality of dovetail grooves formed on the outer peripheral surface side, and a plurality of cooling air introduction holes formed on each rim and having a small rotating shaft side and a large dovetail groove side extending in the radial direction,
A dovetail formed on each rim on the inner peripheral surface side is formed by stacking a leg portion provided between cooling air introduction holes formed on each rim and a core layer body arranged on the outer peripheral side of the rim and divided into a plurality of parts in the axial direction. A plurality of dovetails to be inserted into the grooves are provided, a plurality of slots for accommodating the rotor coil are formed on the outer peripheral surface side, the dovetails are detachably coupled to the rim, and a rotor core and each core layer of the rotor core. By providing the core duct in the radial direction formed between the bodies, the rim is detachably connected directly to the rotating shaft, so that the spider can be omitted and the center part of the rim can be effectively used, and the yield can be improved. Is improved,
In addition to being economical, the legs between the cooling air introduction holes can exhibit the same function as a spider,
A rotor having stable strength can be obtained with a simple structure.

According to the sixth aspect of the present invention, the leg portion arranged on the outer peripheral side of the rotating shaft, divided into a plurality of layers in the axial direction and laminated, and extending on the inner peripheral surface side toward the rotating shaft side is provided. A plurality of slots provided in the circumferential direction, a plurality of slots for accommodating the rotor coil are formed on the outer peripheral surface side, and a leg member is detachably coupled to the rotary shaft, and each rotor yoke body. By providing the ventilation duct in the radial direction formed between them, there is only one detachable connecting point between the rotary shaft and the rotor yoke body, and a more excellent rotor is obtained in terms of economic efficiency. be able to.

Further, according to claim 7 of the present invention, it is arranged on the outer peripheral side of the rotary shaft, is divided into a plurality of layers in the axial direction and is laminated, and the inner peripheral surface side is engaged with the rotary shaft and is detachably coupled. , A rotor yoke body formed with a plurality of slots for accommodating rotor coils on the outer peripheral surface side, cooling air introduction holes formed in the rotor yoke body, and between the rotor yoke bodies By providing the ventilation duct in the radial direction, there is only one detachable connecting point between the rotary shaft and the rotor yoke body, and the rotor yoke body is in contact with the rotary shaft to attach and detach. Since they are coupled as possible, it is possible to obtain a rotor that is more economical.

According to claim 8 of the present invention, it is arranged on the outer peripheral side of the rotary shaft, and the inner peripheral surface side is connected to the rotary shaft,
A spider in which a plurality of arms extending outward in the radial direction are formed on the outer peripheral surface side, and a core layer body arranged on the outer peripheral side of the spider and axially divided into a plurality of layers are stacked, and an inner peripheral surface side is formed. A plurality of legs extending to face the arm of the spider are formed, the legs are detachably coupled to the arm of the spider, and a plurality of slots for accommodating the rotor coil are formed on the outer peripheral surface side. A rotor core, a radial core duct formed between core layer bodies of the rotor core, and a cooling air introduction space formed between adjacent leg portions of the rotor core and adjacent arm portions of the spider. By providing it, the rotor core can be connected to the spider without providing a rim, so the number of components is reduced and the cost is excellent, and at the same time,
It is possible to remove the rotor core from the spider and transport it.

According to claim 9 of the present invention, the rim is arranged on the outer peripheral side of the rotary shaft, and the inner peripheral surface side is connected to the rotary shaft, and the rim is arranged on the outer peripheral side of the rim. The divided core layer bodies are stacked, and a plurality of legs extending to the outer peripheral side of the rim are formed on the inner peripheral surface side, and the leg portions are detachably coupled to the outer peripheral portion of the rim. A rotor core in which a plurality of slots for accommodating rotor coils are formed, a radial core duct formed between core layers of the rotor core, an adjacent leg portion of the rotor core, and an outer peripheral portion of a rim. By providing a cooling air introduction space formed between the rotor and the rotor, the rotor core can be coupled to the rim without providing a spider, so that the number of component parts is reduced and the rotor is excellent in economical efficiency. The core can be removed from the rim and shipped. Further, the structure is simpler than that of the eighth aspect, and the manufacturing is further simplified.

According to a tenth aspect of the present invention, in the eighth or ninth aspect, the core layer body of the rotor core is formed by dividing a thin steel plate into a plurality of circumferentially divided core pieces in the circumferential direction. By arranging in a circular shape and stacking a plurality of layers in the axial direction, the yield of the material is improved and the economy is improved.

According to the eleventh aspect of the present invention, since the communicating groove is formed in at least one of the spider rim or the rim and the rotor core facing each other in any of the first to fifth aspects, it is sufficient. It is possible to realize various cooling characteristics with a simple structure and obtain a highly reliable rotor.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a rotor of a rotary electric machine according to Embodiment 1 of the present invention.

FIG. 2 is a lateral cross-sectional view of a main part showing a rotor of a rotary electric machine according to Embodiment 1 of the present invention.

FIG. 3 is a plan view showing a spider rim according to Embodiment 2 of the present invention.

FIG. 4 is a sectional view showing a spider rim according to Embodiment 2 of the present invention.

FIG. 5 is a plan view showing a spider rim according to Embodiment 3 of the present invention.

FIG. 6 is a plan view showing a divided rim body piece according to a third embodiment of the present invention.

FIG. 7 is a plan view showing a split rim body piece according to a third embodiment of the present invention.

FIG. 8 is a plan view for explaining the yield performance according to the third embodiment of the present invention.

FIG. 9 is a plan view for explaining the yield performance according to the third embodiment of the present invention.

FIG. 10 is a vertical cross-sectional view showing a rotor of a rotary electric machine according to Embodiment 4 of the present invention.

FIG. 11 is a lateral cross-sectional view of a main portion showing a rotor of a rotary electric machine according to Embodiment 4 of the present invention.

FIG. 12 is a plan view showing a rim according to Embodiment 5 of the present invention.

FIG. 13 is a sectional view showing a rim according to a fifth embodiment of the present invention.

FIG. 14 is a plan view showing a rim according to a sixth embodiment of the present invention.

FIG. 15 is a lateral cross-sectional view of essential parts showing a rotor of a rotary electric machine according to Embodiment 7 of the present invention.

FIG. 16 is a vertical cross-sectional view showing a rotor of a rotary electric machine according to Embodiment 8 of the present invention.

FIG. 17 is a lateral cross-sectional view of essential parts showing a rotor of a rotary electric machine according to Embodiment 8 of the present invention.

FIG. 18 is a lateral cross-sectional view of essential parts showing a rotor of a rotary electric machine according to Embodiment 9 of the present invention.

FIG. 19 is a cross-sectional view of essential parts showing a rotor of a rotary electric machine according to Embodiment 10 of the present invention.

FIG. 20 is a lateral cross-sectional view of essential parts showing a rotor of a rotary electric machine according to Embodiment 11 of the present invention.

FIG. 21 is a lateral cross-sectional view of essential parts showing a rotor of a rotary electric machine according to Embodiment 12 of the present invention.

FIG. 22 is a plan view showing a rotor core according to a thirteenth embodiment of the present invention.

FIG. 23 is a plan view showing a split core piece according to Embodiment 13 of the present invention.

FIG. 24 is a plan view showing a split core piece according to Embodiment 13 of the present invention.

FIG. 25 is a lateral cross-sectional view of essential parts showing a rotor of a rotary electric machine according to Embodiment 14 of the present invention.

FIG. 26 is a longitudinal sectional view of an essential part showing a rotor of a rotary electric machine according to a fourteenth embodiment of the present invention.

FIG. 27 is a cross-sectional view of essential parts showing a rotor of a rotary electric machine according to Embodiment 15 of the present invention.

FIG. 28 is a longitudinal sectional view of essential parts showing a rotor of a rotary electric machine according to Embodiment 15 of the present invention.

FIG. 29 is a vertical sectional view showing a rotor of a conventional rotating electric machine.

FIG. 30 is a cross-sectional view of essential parts showing a rotor of a conventional rotating electric machine.

FIG. 31 is a plan view showing a conventional fan-shaped core segment.

FIG. 32 is a plan view showing a conventional rim body.

FIG. 33 is a longitudinal cross-sectional view of a main part showing a rotor of a conventional rotating electric machine.

[Explanation of symbols]

1 rotating shaft, 16 spider rim, 16a rim body, 1
6b legs, 16c dovetail groove, 18 rim duct, 21 rotor core, 21b core layer body, 21c dovetail, 21d slot, 23 core duct, 26
Rotor coil, 29 Spider rim, 29a rim body, 29b leg, 29c dovetail groove, 30 Spider rim, 30a rim body, 30b leg, 30c dovetail groove, 32 rim, 32c dovetail groove, 33
Cooling air introduction hole, 37 rim, 38 rim, 39 rim, 40 Cooling air introduction hole, 41 leg part, 42 rotor yoke, 42a leg part, 42b slot, 44 ventilation duct, 48 rotor yoke, 48c Slot, 49
Cooling air introduction hole, 50 ventilation duct, 54 spider, 5
4c arm part, 55 rotor core, 55a core layer body, 55b leg part, 55c slot, 57 core duct, 59 cooling air introducing space, 61 rim, 62 cooling air introducing space, 63 communicating groove, 64 communicating groove.

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-4-71344 (JP, A) JP-A-5-292691 (JP, A) JP-A 61-277337 (JP, A) Actual development Sho-64- 40250 (JP, U) Actual Kaihei 2-26353 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H02K 1/32 H02K 1/18 H02K 1/30

Claims (11)

(57) [Claims] 1. A rim body, which is arranged on the outer peripheral side of a rotating shaft and is divided into a plurality of parts in the axial direction, is laminated, and a plurality of leg portions extending to the rotating shaft side are formed on the inner peripheral surface side in the circumferential direction. A plurality of dovetail grooves are formed on the outer peripheral surface side, the leg portion is detachably coupled to the rotary shaft, a radial rim duct formed between the rim bodies of the spider rim, and Arranged on the outer peripheral side of the spider rim, a plurality of axially divided core layer bodies are laminated, and on the inner peripheral surface side, a plurality of dovetails to be inserted into the dovetail grooves formed on the spider rim are provided, and the outer peripheral surface side A plurality of slots for accommodating the rotor coil are formed in the rotor core, and the dovetail is detachably coupled to the spider rim;
A rotor for a rotary electric machine, comprising: a radial core duct formed between core layers of the rotor core. 2. The rim body of a spider rim divided into a plurality of pieces in the axial direction according to claim 1, wherein a divided rim body piece formed by dividing a thin steel plate into a plurality of pieces in the circumferential direction has a circular shape in the circumferential direction. A rotor for a rotating electric machine, wherein the rotor is arranged and a plurality of layers are laminated in the axial direction. 3. The rotary shaft is arranged on the outer peripheral side, is divided into a plurality of layers in the axial direction and is laminated, the inner peripheral surface side is engaged with the rotary shaft and is detachably coupled, and the outer peripheral surface side is provided with a plurality of dovetail grooves. Individually formed rims, a plurality of cooling air introduction holes formed in each of the rims, a radial rim duct formed between the rims, and an outer peripheral side of the rims arranged in a plurality in the axial direction. The divided core layer body is laminated, a plurality of dovetails inserted into the dovetail grooves formed on the rim are provided on the inner peripheral surface side, and a plurality of slots for housing the rotor coil are formed on the outer peripheral surface side. A rotor for a rotary electric machine, comprising: a rotor core to which the dovetail is detachably coupled to the rim; and a radial core duct formed between core layer bodies of the rotor core. 4. The rim divided into a plurality of parts in the axial direction according to claim 3, wherein the divided rim body pieces formed by dividing a thin steel plate into a plurality of parts in the circumferential direction are arranged in a circle in the circumferential direction. A rotor for a rotating electric machine, comprising a plurality of layers laminated in the axial direction. 5. The rotary shaft is disposed on the outer peripheral side, is divided into a plurality of layers in the axial direction and is laminated, the inner peripheral surface side is engaged with the rotary shaft and is detachably coupled, and the outer peripheral surface side is provided with a plurality of dovetail grooves. A rim formed individually, and a plurality of rims are formed on each rim,
The rotating shaft side is small and the dovetail groove side is large and a cooling air introduction hole extending in the radial direction, a leg portion formed between the cooling air introduction holes formed in each rim, and an axial direction arranged on the outer peripheral side of the rim. The core layer body divided into a plurality is laminated,
A plurality of dovetails to be inserted into the dovetail grooves formed on the spider rim are provided on the inner peripheral surface side, a plurality of slots for housing the rotor coil are formed on the outer peripheral surface side, and the dovetails are detachably coupled to the rim. And a radial core duct formed between core layers of the rotor core. 6. A plurality of legs, which are arranged on the outer peripheral side of the rotary shaft, are divided into a plurality of layers in the axial direction and are stacked, and a plurality of leg portions extending to the rotary shaft side are provided on the inner peripheral surface side in the circumferential direction, A plurality of slots for accommodating the rotor coils are formed on the outer peripheral surface side, and the leg portions are formed between the rotor yoke body detachably coupled to the rotary shaft and the rotor yoke bodies. A rotor for a rotating electric machine, comprising: a ventilation duct in a radial direction. 7. The rotary shaft is disposed on the outer peripheral side, is divided into a plurality of layers in the axial direction and is laminated, the inner peripheral surface side is engaged with the rotary shaft and is detachably coupled, and the rotor coil is mounted on the outer peripheral surface side. A rotor yoke body having a plurality of slots to be housed therein, a plurality of cooling air introduction holes formed in the rotor yoke body, and a radial ventilation duct formed between the rotor yoke bodies. A rotor of a rotating electric machine, comprising: 8. A spider, which is disposed on the outer peripheral side of a rotary shaft, has an inner peripheral surface side coupled to the rotary shaft, and has a plurality of arm portions extending radially outward on the outer peripheral surface side, and the spider. A plurality of axially divided core layer bodies are laminated, and a plurality of leg portions extending to face the spider arm portion are formed on the inner peripheral surface side. Part is detachably coupled to the arm part of the spider, and a rotor core having a plurality of slots for accommodating rotor coils formed on the outer peripheral surface side, and a radius formed between core layer bodies of the rotor core. Rotor of the rotating electric machine, comprising: a core duct in a direction; and a cooling air introduction space formed between adjacent leg portions of the rotor core and adjacent arm portions of the spider. 9. A rim, which is arranged on the outer peripheral side of a rotary shaft and whose inner peripheral surface side is joined to the rotary shaft, and a core layer body, which is arranged on the outer peripheral side of the rim and is divided into a plurality in the axial direction, are laminated. A plurality of legs are formed on the inner peripheral surface side and extend to the outer peripheral side of the rim, the leg portions are detachably coupled to the outer peripheral portion of the rim, and the rotor coil is housed on the outer peripheral surface side. Between a rotor core having a plurality of slots formed therein, a radial core duct formed between core layer bodies of the rotor core, adjacent leg portions of the rotor core, and an outer peripheral portion of the rim. And a cooling air introduction space formed in the rotor. 10. The core layer body of a rotor core according to claim 8 or 9, wherein the core layer body of the rotor core is formed by dividing a thin steel plate into a plurality of pieces in the circumferential direction and arranging the split core pieces in a circular shape in the circumferential direction. A rotor for a rotating electric machine, comprising a plurality of laminated layers. 11. The rotor of a rotating electric machine according to claim 1, wherein a communicating groove is formed in at least one of the spider rim or the rim and the rotor core that face each other.