KR100901712B1 - A rotor of generator and electric motor - Google Patents

Abstract

A rotor of a generator and a motor is provided to distribute a stress to a whole nut member during a high speed rotation by coupling the coupling bolts in one nut member at the same time. A rotor(100) includes a plurality of magnets(M) and a fixing unit(200). A plurality of magnets is installed along an outer circumference of the rotor. The fixing unit prevents separation of the magnet from the rotor by a centrifugal force generated by rotation of the rotor. The fixing unit includes a pressurized frame(210), a plurality of coupling bolts(220), and a nut member(230). The pressurized frame is installed between the magnets in order to pressurize the magnet. A plurality of coupling bolts is installed with a fixed interval according to a longitudinal direction of the rotor. A plurality of coupling bolts couples the pressurized frame with the rotor. The nut member is coupled in a bottom end of the coupling bolt in order to fix the coupling bolt.

Description

Generator and Motor Rotors {A ROTOR OF GENERATOR AND ELECTRIC MOTOR}

The present invention relates to a structure for firm coupling of the magnet installed on the rotor of the generator or the motor,

It improves the shape of the nut member among the existing methods fixed by bolt and nut tightening by pressing each magnet to solve the imbalance of stress applied to the rotor and nut member, and at the same time improve the nut member installation structure. The present invention relates to a magnet coupling structure of a generator and a motor rotor core, which are easy to process cores for installation.

In general, a generator that generates electromotive force by electromagnetic induction and converts mechanical energy into electrical energy and a motor that generates mechanical driving force by using electrical energy basically has a cylindrical stator, that is, a stator, The rotor is installed inside the stator and is rotated by the rotor shaft and constitutes a rotor, that is, a rotor, which induces power generation in the stator during the rotation process.

At this time, on the outer circumference of the rotor portion, a plurality of magnets necessary for the current relationship with the stator are provided along the outer circumferential surface at a predetermined interval.

When the magnet is installed in the rotor unit, it should be designed so that it does not depart from the rotor core by the centrifugal force generated during the high speed rotation of the rotor unit.

The method of coupling the magnet to the rotor body has been proposed in various ways, among which there is a Korean patent application "magnet coupling structure of the generator and the motor rotor" that was invented and filed by the present applicant.

The prior art is inserted into the rotor 1 in a state in which each magnet (M) is wrapped by the magnet housing (M1) as shown in Figure 1, the support frame (between each of the magnet housing (M1) 2) is installed and the fastening bolt (3) penetrates the support frame (2) and the rotor (1) and consists of a form of fastening the nut (4) to the bottom of the fastening bolt (3).

Since the support frame continuously presses both magnets M through the fastening between the fastening bolts 3 and the nuts 4, the magnets are firmly fixed.

However, the prior art has the following problems in addition to these effects.

First, a plurality of fastening bolts 3 are fastened at intervals along the longitudinal direction of the support frame 2 to ensure a stable fastening force. Therefore, the nuts 4 are also coupled to each fastening bolt 3 separately.

As the individual nuts 4 are used, when the rotor 1 rotates at high speed, each support frame 2 and the fastening bolt 3 try to separate from the rotor 1 by centrifugal force, which is the fastening bolt 3 and Supported by the clamping force between the nuts (4), the stress generated at this time is concentrated significantly near the contact area between each nut (4) and the rotor (1).

Therefore, when there is a difference in the tightening force between the fastening bolts 3 and the nut 4, there is a problem that the stress applied near the position of the nut 4 is not equal, which hinders the stable rotation of the rotor shaft, including the rotor 1. .

In addition, when such an imbalance of stress is formed, there is a high possibility that the fastening force may be lowered by loosening the nut 4 at a specific point due to micro-vibration during high speed rotation.

Second, in recent years, when manufacturing the rotor (1), instead of producing a single integral workpiece, it is possible to lower the heat generation rate during rotation, and to prevent the power loss caused by the electric vortex phenomenon in the rotor and to facilitate processing as shown in FIG. The core 5 is produced by laminating and fixing it.

However, when the support frame 2 is fastened using a separate nut 4 as described above in the laminated structure of the core 5, the cores 5a, 5b, 5c of the layer contacting the nut at high speed rotation may be used. Since stresses are concentrated only on the cores, there is a problem in that the cores 5a, 5b, and 5c.

Third, substantially each nut 5 is installed in the rotor, that is, some core layer as shown in [Fig. 2] to prevent contact with other parts, unlike the structure that is installed to protrude from the rotor 1 as shown in [Fig. 1] Digging the buried groove (6) corresponding to the area of the nut (4) and is installed in the form of embedding each nut (4),

Therefore, in the laminated structure of the core 5, only the cores 5a, 5b, 5c ... should be embedded with the embedding grooves 6, so only cores for processing the embedded grooves 6 should be selected separately during core processing. And the machining of the core is very cumbersome as it must be processed separately.

In addition, since the thickness of each core is very thin, one buried groove 6 is inevitably formed on several layers of cores 5a, 5b, 5c, .... Therefore, the cores 5a, 5b) ( 5c ..) because of the different shape of the machining is more difficult, resulting in a rise in processing costs.

Fourth, even if the buried groove 6 is formed in this way, in order to insert the nut 4 and fasten it to the fastening bolt 3 using a tool, the diameter of the buried groove 6 is not formed much larger than the outer diameter of the nut 4. Not only the fastening of the nut 4, but also the separation can be inconvenient, so maintenance is not easy.

The present invention has been proposed to solve the problems of the prior art as described above,

First, by improving the nut member of the fixing means for pressing and fixing each magnet so that each fastening bolt is fastened to one nut member at the same time, the clamping force and the stress generated during rotation are dispersed throughout the rotor length direction through the nut member and the rotor The purpose is to provide a magnetic coupling structure of the generator and the motor rotor capable of stable rotation of the motor.

In addition, it is an object of the present invention to provide a structure that can prevent the loosening of the nut by the micro-vibration during the rotation of the rotor.

Second, even if the rotor is manufactured in the form of a laminated core, one nut member is intimately adhered to the core of each layer so that the stress applied to the nut member during high-speed rotation can be evenly distributed to each core to prevent damage to a specific core. The purpose is to provide a magnetic coupling structure of a generator and a motor rotor.

Third, by improving the nut member, the shape machining of the point where the nut member is installed in each core of the layer can be made in the same shape and location, thereby simplifying core processing time and work process. The purpose is to provide a coupling structure.

Fourth, the purpose of the present invention is to provide a magnetic coupling structure of the generator and the motor rotor that is easy to maintain and maintain the fastening of the nut member even at high speed, as well as easy fastening and separating the fastening bolt.

The present invention proposed to achieve the above object,

In the magnet coupling structure of the generator and the motor rotor core provided between the magnets installed on the generator or the motor rotor, including a support means for pressing the magnet,

The support means is inserted between each magnet and the pressing frame for pressing each side of the magnet;

A plurality of fastening bolts penetrating the pressure frame to fasten the pressure plate and the rotor;

The fastening bolt is fastened to the lower end of the fastening bolt, characterized in that the fastening hole is formed on each of the fastening bolt is inserted on the upper surface in the form of a rod disposed along the longitudinal direction of the rotor.

In addition, the rotor is made of a form in which the core in the form of a plate overlapping back and forth,

The through-holes are formed in the same line along the rotor longitudinal direction on each core front surface, and a nut member is inserted into the through-holes.

At this time, the through hole of the rotor is made of the same shape and size as the end of the nut member is characterized in that the inner surface of the through hole is in close contact with the outer surface surrounding the nut member.

The present invention consisting of the above characteristic configuration,

First, the nut member of the fixing means for pressurizing each magnet is implemented in the form of a rod such as a rotor length so that each fastening bolt is fastened to one nut member at the same time, so that the stress generated at the nut member fastening portion during rotation becomes the entire nut member. Dispersed throughout, the rotor has the advantage of stable rotation.

Second, even if the rotor is manufactured in the form of a laminated core, one nut member is uniformly in close contact with the core of each layer, so that the load due to the close contact with the nut member is equally distributed to each core to prevent damage to a specific core. There is this.

Third, since the structure is installed in the rotor by simply inserting the rod-shaped nut member, it is possible to form through-holes of the same shape and position on each core, so there is an advantage of easy processing of the core for installing the nut member. .

Fourth, there is an advantage that the maintenance of the rotor is easy because it can be installed and separated in the form of simply inserting the nut member in the through-hole.

Hereinafter, with reference to the configuration illustrated in the drawings will be described embodiments of the specific configuration and its operation of the present invention.

Magnet coupling structure of the generator and the motor rotor of the present invention comprises a rotor 100, a magnet (M) and the fixing means 200 largely as shown in [Fig. 3] to [Fig. 5].

First, the rotor 100, commonly called a rotor, is a stator, that is, a stator (not shown) and a part in which power of a generator or an electric motor is generated. In the center, a shaft hole C1 to which the rotor shaft C is coupled is formed. do.

The rotor 100 is manufactured in a form in which a plurality of cores 100a, 100b, 100c, etc. having a circular thin plate shape are overlapped with each other through the bolts B and fixed to each other.

 Each core (100a) (100b) (100c ..) is coated with an insulating surface so that the electrical current between each core (100a) (100b) (100c ..) overlaps when overlapping the rotor and the integrally manufactured Otherwise, the loss of current due to eddy currents can be prevented.

Of course, in the present invention, an integrated rotor may be applied, but the embodiment applied to the laminated rotor having a relatively low heat generation rate and easy processing will be described.

In addition, a through hole 102 into which the nut member 230 of the fixing means 200, which will be described later, is inserted is formed around the shaft hole C1 of each of the cores 100a, 100b, and 100c. When overlapping (100b) (100c ..), each through hole 102 is in communication with each other to form a through hole 110 penetrating the front and rear surfaces of the rotor (100).

At this time, the through-holes 102 of the cores 100a, 100b, 100c .. are made almost the same as the cross-sectional shape and the cross-sectional area of the nut member 230 to be inserted, so that the nut member 230 may be inserted. The entire outer surface of the 230 is to be in close contact with the inner wall of the through hole (110).

On the outer circumferential surface of the rotor 100, an installation groove 120 for installing the magnet M to be described later is formed in a rail shape along the longitudinal direction of the rotor 100, and the installation groove 120 is the rotor 100. It is formed at intervals along the outer circumferential surface.

At this time, each installation groove 120 is formed at the point alternately shifted from the position of the through hole 110 of the rotor 100 based on the center of the rotor 100 when viewed from the front.

In addition, a plurality of fastening holes 106 for installing the fixing means 200 to be described later are formed between the respective installation grooves 120 at intervals along the rotor longitudinal direction.

Magnets (M) are installed in each of the installation grooves 120 to add rotational force to the rotor shaft through the reaction with the stator magnetic force, using a permanent magnet form and has the same length as the installation grooves 120 The groove 120 is inserted to a certain depth so that the remaining portion is installed in a form protruding from the rotor 100.

At this time, both side ends of each magnet (M) is formed inclined surface (Ma) to be inclined toward each other, the inclined surface (Ma) is a pressing frame (M) of the magnet (M) fixing means 200 to be described later as shown in FIG. When 210 is coupled between the magnets (M) to press the magnet and at the same time the upper surface does not protrude from the magnet (M) to achieve the same plane.

For reference, the magnet M may be installed through a separate magnet housing M1 as shown in FIG. 1 without directly inserting the magnet M into the installation groove 120 to compensate for the departure prevention of the magnet M. The magnet housing M1 is well known through the above-mentioned prior art, and thus detailed description thereof will be omitted.

When the magnet (M) is installed in each installation groove 120 as described above, a space 300 is formed between each magnet (M). At this time, the shape of each space portion 300 has an inverted trapezoidal shape in which the area is reduced downward by the inclined surfaces Ma of both magnets M. As shown in FIG.

And the fixing means 200 is installed in each of the space portion 300, the fixing means 200 is the core structure of the present invention, by supporting each magnet (M) is generated during the rotation of the rotor 100 It is to prevent the magnet (M) is separated from the installation groove 120 by the centrifugal force, it is composed of a pressing frame 210, the fastening bolt 220 and the nut member (230).

First, the pressing frame 210 supports the magnet M through contact with each magnet M. The pressing frame 210 has the same length as the magnet M, and is inserted and installed in each space 300 between the magnets M. FIG. do.

At this time, the pressing frame 210 is made of the same cross-sectional area as the space 300, the pressing inclined surface 212 having the same angle as the inclined surface Ma of each magnet (M) is formed on both sides.

Therefore, as shown in FIG. 6, when the pressing frame 210 is inserted into the space part 300, both side pressure inclined surfaces 212 are brought into close contact with one side inclined surface Ma of the two magnets.

In addition, the pressing frame 210 should be made of a material other than a ferromagnetic material such as stainless steel to minimize the leakage of unnecessary magnetic force generated in the magnet (M) when contacted with the magnet (M).

Among them, austenitic stainless steel, which is an iron-nickel-chromium-based magnetic material, may be applied. However, the austenitic stainless steel also becomes magnetic when martensite transformation occurs due to cold working. must do it.

The material of the pressing frame 210 is not necessarily limited thereto, and may be selectively used among materials whose magnetism is suppressed as much as possible, such as aluminum or copper-based metals, depending on the field of application of the generator and the motor.

And after manufacturing the pressing frame in the longitudinal direction without making a single rod form, and then inserted into the space portion 300 in order to produce a form that connects the fastening bolts 220 to be described later than the integral manufacturing When the strength degradation can be prevented.

And the insertion hole 214 is formed along the longitudinal direction on each of the pressing frames 210, the forming position of the insertion hole 214 is the rotor 100 when the pressing frame 210 is inserted into the space portion 300 It is formed at the point in communication with the fastening hole 106 formed in).

The pressing frame 210 is fixed to the position by the fastening bolt 220 and the nut member 230 passing through each insertion hole 214, among which the fastening bolt 220 is each insertion hole 214 and the rotor The end of the rotor 100 has a length enough to be positioned in the through hole 110 of the rotor 100.

The fastening bolt 220 may be fastened in one or a plurality of rows depending on the area of the pressing frame 210 as shown in FIG.

In addition, the nut member 230 is a core component of the present invention, the function of which is to prevent the fastening bolt 220 is separated from the rotor 100 is the same as the prior art.

However, unlike the prior art in which each fastening bolt 220 is provided separately and coupled to each other, the fastening bolts 220 are formed in one rod shape, and each fastening bolt 220 is simultaneously fastened to one nut member 230.

Specifically, the same length as that of the through hole 110 of the rotor 100 and the same cross-sectional shape and cross-sectional area are also manufactured, and the upper end of each of the fastening bolts 220 is inserted into the three-dimensional screw hole 232 is formed do.

The nut member 230 is inserted into the through hole 110 of the rotor 100. At this time, since the cross section is the same as the through hole 110, the entire upper, lower, left and right surfaces of the nut member 230 are in close contact with the entire inner wall of the through hole 110. Is placed in a state.

In addition, the area of the nut member 230 may be deformed and applied depending on the case where the fastening bolts 220 are arranged in one row or a plurality of rows.

Thus, in the state in which the nut member 230 is inserted into each through hole 110, a separate blocking plate 400 is coupled to the front and rear surfaces of the rotor 100 to block the front and rear openings of the through hole 110 and the magnet (M). ) Also blocks the front and rear surfaces to block the magnet (M) from exiting through the front and rear openings of the installation groove (120).

Next will be described the operation of the present invention by the configuration as described above and the effects generated in the operation process.

First, when a current is supplied to the stator, the rotor shaft, including the rotor 100, is rotated by the magnet difference between the rotor 100 and the stator, and the magnet M installed on the rotor 100 and the fixing means 200. ) Rotates together.

By this rotation, each magnet (M) has a tendency to escape to the outside by centrifugal force.

At this time, since each end of the magnet (M) is pressed by the fixing means 200, that is, the pressing frame 210, the separation is prevented.

Like the magnet (M), the pressing frame 210 and the fastening bolt 220 also receives a force to be separated by centrifugal force, which is supported by the fastening between the fastening bolt 220 and the nut member 230.

Therefore, the force to be separated from the fastening bolt 220 and the pressing frame 210 is concentrated on the fastening portion with the fastening bolt 220 of the nut member (230). However, since each fastening bolt 220 is fastened to one nut member 230 at the same time, and the entire upper surface of the nut member 230 is in close contact with the entire inner wall of the through hole 110, it is formed at the nut fastening portion. The stress that is distributed is distributed over the entire area of the nut member 230 is not a conventional phenomenon that is concentrated at a specific point.

Because of this, even when the rotor 100 is implemented by stacking cores 100a, 100b, and 100c .., one nut member is in close contact with each core 100a, 100b and 100c .. The same load is applied to each core of each layer to solve the problem of the prior art in which the load is concentrated only on the core layer of the portion where the nut member 230 is installed.

In addition, since several fastening bolts 220 are fastened to one nut member 230 at the same time, even if there is a problem in the fastening force with a specific fastening bolt 220, the nut member 230 can be prevented from being released, and furthermore, 110, since the entire inner wall is in close contact with the nut member 230, the phenomenon in which the through-hole 110 and the nut member 230 collide with each other even by high speed rotation may be eliminated.

In addition, since the nut member 230 of the rod shape is simply inserted into the through-hole 110 of the rotor 100, the same position for each core (100a) (100b) (100c) in the process of manufacturing the rotor 100, What is necessary is to process each through hole 102 of a magnitude | size.

Therefore, processing of each core is much simpler than in the prior art, in which grooves of irregular shapes must be formed for specific cores to form nut buried grooves.

As described above, the present invention improves the shape of the nut member 230 of the fixing means 200 for preventing the separation of the magnet M so that each fastening bolt 220 is simultaneously fastened to one nut member 230. by doing,

As the stress generated at the nut fastening part is distributed evenly throughout the nut member 230 during the high speed rotation, it is possible to solve all the problems such as the instability of the rotor rotation and the damage of a specific core due to the stress imbalance. 230) It is characterized in that the installation is very easy to process the core for space.

The present invention can be implemented in a variety of modifications, of which [7] and [8] is a view showing a modified embodiment, [7] the rotor is a rotor body 150 and the celebration housing (160) When the space between the) is manufactured to form the nut member 230, the nut member 230 is installed in close contact with the bottom surface of the rotor body 150 without forming a separate space. That is, it is the same as a general nut installation structure.

And [Fig. 8] is the same as [Fig. 7] the nut installation space in the state of manufacturing the rotor in the form of the buried groove 170 in the longitudinal direction before and after the rotor rather than through-hole shape the whole nut member 230 This is the case where the buried groove 170 is buried.

In the two embodiments of the present invention, although the through-holes may be inferior in the stable coupling effect between the nut member and the installation site, compared to the first embodiment in which a stable coupling is possible by surrounding the nut member, the load is distributed using only one nut member. The basic features of can be implemented.

Various features of the magnet coupling structure of the present invention generator and motor rotor described above can be variously modified and combined by those skilled in the art, but these modifications and combinations are one of the magnet fixing means consisting of a pressure plate and a fastening bolt and a nut member. When a plurality of fastening bolts are fastened to the nut member at the same time and related to the configuration and the purpose of dispersing the stress at the nut fastening portion, it should be determined that they belong to the protection scope of the present invention.

1 is a partially enlarged cross-sectional view showing a form in which a separate nut is fastened for each fastening bolt of the fixing means of the prior art.

2 is a partially enlarged side sectional view showing a state in which a nut is installed by implementing a rotor and forming a buried groove through stacking of cores in the prior art;

3 to 6 is a view of the present invention,

Figure 3 is an exploded perspective view showing the overall coupling structure of the rotor and the magnet and the fixing means

Figure 4 is an enlarged view showing the magnet coupling state on the rotor

5 and 6 is a side cross-sectional view and a front cross-sectional view showing the overall coupling state

<Description of the symbols for the main parts of the drawings>

  100: rotor 100a, 100b ...: core

  102: through hole 106: fastening hole

  110: through hole 120: installation groove

  M: magnet 200: fixing means

  210: pressure frame 220: fastening bolt

  230: nut member

Claims (3)

In the generator and the motor rotor comprising a fixing means for pressing the magnet is provided between each magnet installed along the outer circumferential surface of the generator or motor rotor, The fixing means includes a pressing frame inserted between each magnet to pressurize each magnet, a fastening bolt inserted into the pressing frame and the rotor to be fastened to each other, and a nut member fastened to the bottom of the fastening bolt to fix the fastening bolt. But The fastening bolts are provided in plurality in intervals along the longitudinal direction of the rotor and the nut member is a generator and motor rotor, characterized in that the magnet coupling structure of the shape of one rod arranged along the longitudinal direction of the rotor core The method of claim 1, The rotor is made of a form in which the core in the form of a plate overlapping back and forth, Generator and motor rotor, characterized in that the through hole is formed in the same line along the longitudinal direction of the rotor in each core surface, and the magnet coupling structure in which the nut member is inserted into the through hole The method of claim 2, The through-holes are manufactured in the same manner as the cross-sectional shape and cross-sectional area of the nut member, and the generator and the motor rotor having a magnet coupling structure in which the inner wall of the through-hole closes and wraps against the outer surface of the nut member.

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