JP5615466B2 - Shaft system assembling method and shaft system assembling jig for regenerative energy generator - Google Patents

Description

  The present disclosure relates to a shaft system assembling method and a shaft system assembling jig for a regenerative energy power generator. Here, the renewable energy type power generation device is a power generation device that uses renewable energy such as wind, tidal current, ocean current, river flow, etc., for example, wind power generation device, tidal current power generation device, ocean current power generation device, river current power generation device, etc. Can be mentioned.

  In recent years, from the viewpoint of conservation of the global environment, wind power generators using wind power and renewable energy power generators including power generators using tidal currents, ocean currents, or river currents have been widely used. As a regenerative energy type power generator, there is known a regenerative energy type power generation device including a blade for receiving regenerative energy, a hub to which the blade is attached, a rotating shaft connected to the hub, and a generator for converting the rotating energy of the rotating shaft into electric power. It has been.

Regenerative energy power generators are increasing in size from the viewpoint of improving power generation efficiency, and the load acting on the rotating shaft tends to increase more and more. Therefore, a regenerative energy type power generation device has been proposed in which a rotating shaft is supported on a nacelle by a pair of bearings.
For example, in the wind power generators described in Patent Documents 1 to 6, the rotating shaft is supported by the nacelle via a pair of bearings including a front bearing close to the hub and a rear bearing far from the hub. Patent Document 6 also discloses a configuration in which a bearing box of a pair of bearings that pivotally support a rotating shaft is shared as an integral cylindrical body.

International Publication No. 2011/135703 US Patent Application Publication No. 2011/0266806 International Publication No. 2009/080712 International Publication No. 2011/016108 US Patent Publication No. 2011/0143880 Korean Published Patent No. 10-2011-0070623

By the way, in a regenerative energy type power generator that supports a rotating shaft with a pair of bearings, if the cores of the pair of bearings that support the rotating shaft are misaligned, a load component in an unplanned direction is applied to the bearing. This can lead to an extreme decrease in bearing life. Therefore, when installing the rotating shaft on the nacelle, it is necessary to adjust the position so as to ensure the concentricity of each bearing.
In this regard, Patent Documents 1 to 5 do not describe sufficient measures for ensuring concentricity between the bearings when the rotating shaft is installed on the nacelle.
Further, in the wind power generator described in Patent Document 6, the integral cylindrical body in which the bearing boxes of the respective bearings are made in common has a very large physique, so a high-quality and high-accuracy cylindrical body (bearing box) is used. It is difficult to manufacture.

  An object of at least one embodiment of the present invention is to provide a method of installing a shaft system of a regenerative energy type power generation device that can accurately position a pair of bearings that support a rotating shaft during installation of the rotating shaft and that can be easily manufactured. And providing a wind turbine generator.

  According to at least one embodiment of the present invention, there is provided a method for installing a shaft system of a regenerative energy type power generation apparatus, comprising at least one blade, a hub to which the at least one blade is attached, and a rotating shaft coupled to the hub. A method of installing a shaft system of a regenerative energy type power generator comprising: a first bearing and a second bearing that pivotally support the rotating shaft; and a nacelle including a nacelle base plate that supports the bearings from below. A step of assembling one bearing and the second bearing to the rotary shaft, and a bearing box of the first bearing and a bearing box of the second bearing so that the first bearing and the second bearing are concentric. A step of connecting with a connecting member; and the concentricity of the first bearing and the second bearing maintained by the connecting member together with the first bearing and the second bearing. Rolling, characterized in that it comprises the steps of installing a shaft to the nacelle base plate.

In the above-described method for installing the shaft system of the regenerative energy type power generator, the first bearing and the second bearing are concentrically assembled by assembling the first bearing and the second bearing to the rotating shaft before the rotating shaft is installed on the nacelle base plate. Thus, the bearing housing of the first bearing and the bearing housing of the second bearing are coupled by a coupling member. Thus, when the rotating shaft is installed on the nacelle base plate, the first bearing and the second bearing are maintained substantially concentrically by the connecting member, so that the positioning of the first bearing and the second bearing can be performed with high accuracy. It can be carried out.
In addition, the bearing box of each bearing is not shared as an integral cylindrical body, but the bearing box of the first bearing and the bearing box of the second bearing are configured separately and are connected by a connecting member. As a result, high-quality and high-precision bearing boxes can be easily manufactured.

In some embodiments, in the step of connecting with the connecting member, the bearing box of the first bearing and the bearing box of the second bearing are respectively connected in the radial direction of the rotary shaft to the connecting member by inlay fitting. May be positioned.
In this way, by positioning the first bearing and the second bearing in the radial direction by inlay fitting, the first bearing and the second bearing can be aligned, and the first bearing and the second bearing are misaligned. It is possible to prevent the extreme decrease in bearing life caused.

In some embodiments, in the step of assembling the first bearing and the second bearing, the first bearing formed in a seamless annular shape in a state where the rotating shaft is erected along a vertical direction. The second bearing may be inserted through the rotary shaft in order.
In this way, by assembling the first bearing and the second bearing with the rotating shaft standing upright, it becomes possible to use an annularly formed bearing, and even a large-diameter rotating shaft can be used. The bearing assembly work can be carried out efficiently.

In some embodiments, in the step of installing the rotary shaft, the first bearing and the second bearing are prevented so as to prevent displacement of the first bearing and the second bearing at least in a horizontal direction perpendicular to the axial direction of the rotary shaft. The second bearing may be fixed to the nacelle base plate.
Since loads of various components are transmitted from the regenerative energy source to the rotating shaft, there is a possibility that the cores of the first bearing and the second bearing are slightly displaced by this load. Therefore, by fixing these bearings to the nacelle base plate so as to prevent the displacement of the first bearing and the second bearing in the horizontal direction orthogonal to the axial direction of the rotating shaft, even during operation of the regenerative energy generator Concentricity can be secured.

In some embodiments, in the step of installing the rotating shaft, the position in the horizontal direction with respect to the nacelle base plate of at least one of the first bearing and the second bearing is finely adjusted, and the position is finely adjusted. The first bearing and the second bearing may be fixed to the nacelle base plate.
Thus, before the first bearing and the second bearing are fixed to the nacelle base plate, the positional accuracy of each bearing is further improved by finely adjusting the horizontal positions of the first bearing and the second bearing. be able to. For example, after installing the rotating shaft on the nacelle base plate, when removing the connecting frame and fixing the first bearing and the second bearing, the horizontal direction is maintained even if the core is slightly displaced when removing the connecting frame. The deviation can be corrected by fine-tuning the position of.

In some embodiments, in the step of installing the rotary shaft, a convex portion that is formed on one of the bearing and the nacelle base plate and extends in the axial direction of the rotary shaft; and the bearing and the nacelle base The first bearing and the second bearing are placed on the nacelle base plate so that the concave portion formed on the other side of the plate and extending in the axial direction is fitted, and between the convex portion and the concave portion. A liner may be interposed between the bearings and the nacelle base plate in the horizontal direction for fine adjustment.
Thus, since the convex part formed in one side of each bearing and a nacelle base plate and the concave part formed in the other were fitted, horizontal fixation is realizable with a simple structure. In addition, since the relative position between each bearing and the nacelle base plate is finely adjusted by interposing a liner between the convex part and the concave part, each bearing can be raised by using an appropriate thickness liner. It can be fixed in a state of being accurately positioned.

In some embodiments, in the step of installing the rotary shaft, a relative position between the first bearing and the second bearing and the nacelle base plate is finely adjusted, and an eccentric pin is adjusted in a state where the relative position is finely adjusted. The bearings may be used to fix the nacelle base plate.
As described above, since the eccentric pin is used for fixing the first bearing and the second bearing to the nacelle base plate, even if the pin hole is displaced due to fine adjustment of the relative position between each bearing and the nacelle base plate, Can be fixed to the nacelle base plate, and even if a horizontal load is applied after fixing, the relative positions of the bearings and the nacelle base plate can be maintained by the eccentric pins.

In some embodiments, in the step of installing the rotating shaft, a shim is interposed between the first bearing and the second bearing, and the nacelle base plate, so that the first relative to the nacelle base plate is provided. The heights of the bearing and the second bearing may be adjusted.
Thereby, a 1st bearing and a 2nd bearing can be positioned with sufficient precision also to a height direction.

In some embodiments, in the step of installing the rotary shaft, after the rotary shaft is installed on the nacelle base plate, the upper part of the bearing box of the first bearing and the upper part of the bearing box of the second bearing are connected. You may connect with a frame.
As a result, the bearing housing of the first bearing and the bearing housing of the second bearing are connected to each other by the connecting frame, and the bearing housing of each bearing is restrained by the connecting frame. Therefore, even when complicated loads and moments from the renewable energy source are input to the rotating shaft during operation of the renewable energy type power generation device, the concentricity between the bearings can be maintained by the action of the connecting frame.

In some embodiments, in the step of installing the rotating shaft, shims are respectively interposed between the leg portions of the connection frame connecting the first bearing and the second bearing and the nacelle base plate. After adjusting the height of the connection frame with respect to the nacelle base plate, the leg portion may be fixed to the nacelle base plate.
Thereby, according to the height of the bearing housing of each bearing, the height of a connection frame can be adjusted appropriately.

In some embodiments, the connecting member remains even after the rotary shaft is installed on the nacelle, and the bearing box of the first bearing and the bearing of the second bearing during operation of the regenerative energy type power generation device. It may be used for connection with a box.
In this manner, by leaving the connecting member attached to the rotating shaft, it is possible to continuously maintain the concentricity of each bearing when the rotating shaft is installed until the regenerative energy power generator is operated.

  A renewable energy type power generating apparatus according to at least one embodiment of the present invention is a renewable energy type power generating apparatus that generates electric power using renewable energy, wherein at least one blade and the at least one blade are attached. A hub, a rotating shaft coupled to the hub, a first bearing and a second bearing that pivotally support the rotating shaft, a nacelle including a nacelle base plate that supports each bearing from below, the first bearing, A connecting member that connects the first bearing and the second bearing so that the second bearing is concentric, and the first bearing and one end of the connecting member are positioned in a radial direction by a spigot fitting. The second bearing and the other end of the connecting member are positioned in a radial direction by a spigot fitting so that the first bearing and the second bearing are concentric. Characterized in that it is connected to each other by a member.

According to the regenerative energy type power generation device, the connecting member that connects the first bearing and the second bearing is provided, and the connecting member, the first bearing, and the second bearing are each positioned in the radial direction by the spigot fitting. Thus, the concentricity of the first bearing and the second bearing can be ensured with high accuracy. Further, even when complicated loads and moments from a renewable energy source are input to the rotating shaft during operation of the renewable energy power generation device, concentricity between the bearings can be maintained by the action of the connecting member.
Further, the bearing housing of each bearing is not made common as an integral cylindrical body, but the bearing housing of the first bearing and the bearing housing of the second bearing are configured separately and are connected by a connecting member. As a result, high-quality and high-precision bearing boxes can be easily manufactured.

In some embodiments, the rotating shaft further includes a driven device attached to an end of the rotating shaft remote from the hub, supported by the nacelle base plate, and driven by the rotating shaft, wherein the first bearing is a radial bearing. And the second bearing may be a thrust bearing and may be located on the driven device side. The first bearing may be a double row cylindrical roller bearing, and the second bearing may be a double row conical roller bearing.
Thus, by adopting the thrust bearing as the second bearing located on the driven device side, the distance from the thrust bearing, which is the reference for the elongation of the rotating shaft, to the driven device is reduced, and the elongation of the rotating shaft (for example, The relative displacement between the driven device and the nacelle base plate due to the heat transfer from the driven device side or the thermal elongation of the rotating shaft heated by the heat generation of the bearing itself can be reduced. Thereby, it is possible to reduce the possibility that the support portion and the piping are damaged due to an excessive load applied to the piping between the support portion and the peripheral devices between the driven device and the nacelle base plate due to the relative displacement between the driven device and the nacelle base plate. On the other hand, by adopting a radial bearing as the first bearing located on the hub side, the radial load transmitted from the blade and the hub to the rotating shaft can be supported by the first bearing located on the side closer to the hub.

In some embodiments, the first bearing and the second bearing include the first bearing located on the hub side and the second bearing provided at a position farther from the hub than the first bearing. The rotating shaft has a first region to which the first bearing is attached and a second region to which the second bearing is attached, and the rotation shaft is rotated from the first region side toward the second region side. The shaft is reduced in diameter, and a first step portion that restricts movement of the inner ring of the first bearing toward the hub is formed in the first region, and the second bearing is formed in the second region. A second step portion that restricts movement of the inner ring toward the hub is formed, and an inner diameter of the inner ring of the first bearing may be larger than a maximum diameter of the second step portion.
When the rotary shaft is pivotally supported by the first bearing and the second bearing, a large load is applied because the first bearing is closer to the hub than the second bearing. Therefore, the first bearing having a larger physique than the second bearing is adopted by reducing the diameter of the rotating shaft from the first region side to which the first bearing is attached toward the second region side to which the second bearing is attached. The durability of the first bearing can be improved. In addition, the rotating shaft around the second region has a relatively small diameter, reducing the weight of the rotating shaft and reducing the weight and size of the second bearing.
Furthermore, a first step portion for restricting movement of the inner ring of the first bearing to the hub side and a second step portion for restricting movement of the inner ring of the second bearing to the hub side are respectively provided in the first region and the second step. It is provided in the region, and the inner diameter of the inner ring of the first bearing is made larger than the maximum diameter of the second stepped portion, so that the first bearing and the second bearing are fitted in order from the end opposite to the hub of the rotating shaft. It is possible to adopt a method for assembling the bearing. As a result, it is possible to easily perform the assembling work of the first bearing and the second bearing to the rotating shaft.

  In some embodiments, the renewable energy power generation device may be a wind power generation device that generates electric power from wind as the renewable energy.

According to at least one embodiment of the present invention, when the rotating shaft is installed on the nacelle base plate, the first bearing and the second bearing are maintained substantially concentrically by the connecting member. The bearing can be positioned with high accuracy.
Also, since the bearing housing of the first bearing and the bearing housing of the second bearing are configured separately and are connected by a connecting member, it is possible to easily manufacture high-quality and high-accuracy bearing housings. .

It is a figure which shows the outline of the whole structure of the wind power generator which concerns on one Embodiment. It is a perspective view which shows the structural example inside the nacelle of the wind power generator which concerns on one Embodiment. It is a side view of the axis system of the wind power generator shown in FIG. It is sectional drawing of the shaft system shown in FIG. It is an enlarged view of the area | region shown with the code | symbol A in FIG. It is an enlarged view of the area | region shown with the code | symbol B in FIG. Drawing 7 (a)-(c) is a figure showing the assembly procedure of the 1st bearing to the rotating shaft in one embodiment. Drawing 8 (a)-(c) is a figure showing the fixation procedure to the 1st bearing of the spacer in one embodiment. It is a figure which shows the spigot fitting part between a spacer and a 1st bearing. Drawing 10 (a)-(c) is a figure showing the assembly procedure of the 2nd bearing to the rotating shaft in one embodiment. It is a figure which shows the spigot fitting part between a spacer and a 2nd bearing. It is a figure which shows a mode that the rotating shaft which assembled | attached the 1st bearing and the 2nd bearing is installed in a nacelle. FIGS. 13A to 13C are diagrams illustrating a procedure for removing the spacer from the pair of bearing boxes. FIG. 14A is a diagram of the first bearing viewed from the axial rear side of the rotating shaft, and FIG. 14B is a diagram of the second bearing viewed from the axial rear side of the rotating shaft. 15A is a perspective view showing a fitting portion between the bearing box and the nacelle base plate, FIG. 15B is a front view showing the fitting portion between the bearing case and the nacelle base plate, and FIG. It is a perspective view which shows the structural example of a liner and a shim. It is a figure which shows the positioning structure of the bearing box using a shear pin. It is sectional drawing of a shear pin periphery. It is a perspective view which shows the nacelle internal structure of the wind power generator provided with the connection frame between a pair of bearing boxes.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described below as the embodiments or shown in the drawings as the embodiments are not intended to limit the scope of the present invention. It is just an example.

Hereinafter, after describing a regenerative energy type power generation device according to an embodiment of the present invention, a method for installing the shaft system will be described.
Although a wind power generator is described here as an example of a renewable energy power generator, the embodiment of the present invention can also be applied to other renewable energy power generators such as a tidal power generator, a sea current power generator, and a river current power generator. .

  Drawing 1 is a figure showing the outline of the whole composition of the wind power generator concerning one embodiment. FIG. 2 is a perspective view illustrating a configuration example inside the nacelle of the wind turbine generator according to the embodiment. FIG. 3 is a side view of the shaft system of the wind turbine generator shown in FIG. 4 is a cross-sectional view of the shaft system shown in FIG. FIG. 5 is an enlarged view of a region indicated by a symbol A in FIG. FIG. 6 is an enlarged view of a region indicated by a symbol B in FIG.

As shown in FIG. 1, the wind turbine generator 1 includes a rotor 3 including at least one blade 2 and a hub 4, a rotating shaft 6 connected to the hub 4, a generator 16 that generates electric power, A drive train 10 that transmits the rotational energy of the rotary shaft 6 to the generator 16 is provided.
Various devices including the rotating shaft 6 may be stored in the nacelle 30 installed on the tower 8 standing on the water or on the ground and covered with the nacelle cover 30B of the nacelle 30. The hub 4 may be covered with a hub cover 5.

In some embodiments, the drive train 10 is connected to the hydraulic pump 12 via a hydraulic pump 12 attached to the rotating shaft 6 and a high pressure oil line 13 and a low pressure oil line 15 as shown in FIG. And a hydraulic motor 14. The hydraulic pump 12 is driven by the rotary shaft 6 to increase the pressure of the hydraulic oil and generate high-pressure hydraulic oil (pressure oil). The outlet of the hydraulic pump 12 is connected to the inlet of the hydraulic motor 14 via the high pressure oil line 13. Therefore, the pressure oil generated by the hydraulic pump 12 is supplied to the hydraulic motor 14 via the high-pressure oil line 13, and the hydraulic motor 14 is driven by this pressure oil. The low-pressure hydraulic oil that has been worked by the hydraulic motor 14 is returned again to the hydraulic pump 12 via the low-pressure oil line 15 provided between the outlet of the hydraulic motor 14 and the inlet of the hydraulic pump 12. The output shaft of the hydraulic motor 14 is connected to the rotating shaft of the generator 16, and the rotation of the hydraulic motor 14 is input to the generator 16.
In addition, the number of the hydraulic pump 12, the hydraulic motor 14, and the generator 16 is not specifically limited, Each should just be at least one.

In one embodiment, the drive train 10 and the generator 16 are installed in the nacelle 30.
In the exemplary embodiment shown in FIG. 2, the nacelle 30 includes a nacelle base plate 30A that supports the bearing boxes 21 and 23 of the bearings 20 and 22, and a nacelle that covers various devices placed on the nacelle base plate 30A. It includes a cover 30B and a nacelle frame 30C to which the nacelle cover 30B is fixed. The nacelle base plate 30A is made of cast steel such as spheroidal graphite cast iron or tough cast iron.
A hydraulic pump 12 is attached to the end of the rotating shaft 6. In addition, a pair of equipment installation bases 46 are provided on both sides of the rotating shaft 6 (however, only the front equipment installation base 46 is shown in FIG. 2), and each equipment installation base 46 has a pair of hydraulic pressures. A motor 14 and one generator 16 are installed. The equipment installation base 46 is supported by a nacelle base plate 30A and a nacelle frame 30C assembled thereto.

The rotating shaft 6 is rotatably supported by the nacelle 30 via the first bearing 20 and the second bearing 22 as shown in FIGS. The first bearing 20 is located on the hub 4 side, and the second bearing 22 is located farther from the hub 4 than the first bearing 20. In some embodiments, the bearing housing 21 of the first bearing 20 and the bearing housing 23 of the second bearing 22 are supported by the nacelle base plate 30 </ b> A of the nacelle 30 and are coupled to each other by the cylindrical coupling member 40. . At this time, the bearing box 21 of the first bearing 20 and one end of the connecting member 40 are positioned in the radial direction by spigot fitting, and the bearing box 23 of the second bearing 22 and one end of the connecting member 40 are connected by the inlay. Positioning in the radial direction by fitting. Thereby, the concentricity of the bearing box 21 of the first bearing 20 and the bearing box 23 of the second bearing 22 is ensured. The specific configuration of the spigot fitting will be described in detail later.
The connecting member 40 may be formed with a pair of notches 42 on both sides of the rotating shaft 6. The space formed by this notch 42 can be used for various purposes (for example, a part-hanging operation using a lifting device such as a crane).

  Further, at least one brake caliper 27 is directly or indirectly fixed to the bearing box 21 of the first bearing 20. The brake caliper 27 applies a braking force to the rotor 3 and the rotary shaft 6 by pressing a brake pad against the brake disc 28 fastened together with the hub 4 together with the flange portion of the rotary shaft 6.

In one embodiment, as shown in FIGS. 3 and 4, the rotary shaft 6 has an attachment position (first position) of the second bearing 22 as compared to a first region around the attachment position (first attachment position) of the first bearing 20. 2 mounting position) The second region around the periphery has a smaller diameter. In other words, the rotating shaft 6 is reduced in diameter from the first region side toward the second region side.
When the rotary shaft 6 is pivotally supported by the pair of bearings 20 and 22, the first bearing 20 is closer to the hub 4 than the second bearing 22, so that a large load is applied. Therefore, by reducing the diameter of the rotating shaft 6 from the first region side toward the second region side, the first bearing 20 having a larger physique than the second bearing 22 is adopted, and the durability of the first bearing 20 is increased. Can be improved. Further, the rotation shaft 6 in the area around the second mounting position has a relatively small diameter, so that the weight of the rotation shaft 6 can be reduced and the second bearing 22 can be reduced in weight and size.

Further, the first region is provided with a first step 6A for restricting movement of the inner ring of the first bearing 20 toward the hub 4 side. Similarly, a second step 6B for restricting movement of the inner ring of the second bearing 22 toward the hub 4 is provided in the second region.
In order to form the second step 6B, the outer peripheral surface of the rotating shaft 6 is raised, and the diameter of the rotating shaft 6 is slightly increased at this raised portion. The diameter of the rotating shaft 6 at this raised portion is set to be smaller than the inner ring of the first bearing 20. This makes it possible to employ a bearing assembly method in which the first bearing 20 and the second bearing 22 are fitted in this order from the end of the rotary shaft 6 far from the hub 4, and the first bearing 20 and the first bearing 20 on the rotary shaft 6 can be employed. Assembling work of the two bearings 22 can be easily performed.

In some embodiments, as shown in FIG. 5, the first bearing 20 includes an inner ring 50 fitted on the outer periphery of the rotary shaft 6, an outer ring 51 fitted on the inner circumference of the bearing box 21, and an inner ring. 50 and the outer ring | wheel 51 are comprised including the rolling element 52 provided. Note that the inner ring 50, the outer ring 51, and the bearing box 21 are all continuous annular shapes that are seamless in the circumferential direction, and have a so-called seamless structure.
In the exemplary embodiment shown in FIG. 5, in the first bearing 20, a rolling element 52 made of cylindrical rollers is fitted into a groove provided in the outer ring 51, and the radial load of the rotating shaft 6 is applied to the cylindrical shape of the rolling element 52. This is a cylindrical roller bearing (an example of a “radial bearing”) received on the outer peripheral surface of the cylinder. Furthermore, the cylindrical roller bearing is also referred to as a “thrust-free bearing” in which the rolling element 52 can move in the axial direction with respect to the inner ring 50 although the axial position of the rolling element 52 with respect to the outer ring 51 is restricted. is there.

In the exemplary embodiment shown in FIG. 5, a pair of inner ring pressing rings (53 </ b> A, 53 </ b> B) are provided on both sides of the inner ring 50 of the first bearing 20. That is, the inner ring 50 is disposed so as to be sandwiched between the first inner ring holding ring 53A located on the side closer to the hub 4 and the second inner ring holding ring 53B located on the side far from the hub 4.
The first inner ring presser ring 53A is fitted to the rotary shaft 6 so as to abut on a first step 6A provided on the rotary shaft 6. Further, on the side opposite to the inner ring 50 across the second inner ring presser ring 53B, a presser nut 54 having a female screw that engages with a male screw formed on the outer periphery of the rotary shaft 6 is disposed. Therefore, the inner ring 50 is pressed against the first inner ring presser ring 53A in contact with the first step 6A by the tightening force of the presser nut 54 transmitted to the inner ring 50 via the second inner ring presser ring 53B. Directional position is regulated. Note that the axial position of the inner ring 50 may be regulated by using, for example, a tightening force by a shrink disk instead of the tightening force by the presser nut 54.
On the other hand, the outer ring 51 of the first bearing 20 includes a convex portion 21 </ b> A and an outer ring presser plate 55 attached to the bearing box 21 so as to protrude radially inward from the bearing box 21 along the outer peripheral surface of the rotating shaft 6. The axial position is regulated by being sandwiched.

The bearing box 21 of the first bearing 20 is provided with an internal flow path 24 for supplying lubricating oil to the rolling contact surface between the inner ring 50 or the outer ring 51 and the rolling element 52 in the first bearing 20. The internal flow path 24 penetrates the outer ring 51 and communicates with an annular space between the inner ring 50 and the outer ring 51 (a space in which the rolling elements 52 are disposed). The annular space is filled with lubricating oil supplied via the internal flow path 24.
In some embodiments, seal rings (56A, 56B) are provided to prevent leakage of lubricating oil from the annular space between the inner ring 50 and the outer ring 51. In the exemplary embodiment shown in FIG. 5, the seal ring 56 </ b> A and the spacer ring 57 </ b> A adjacent to the seal ring 56 </ b> A are sandwiched between the bearing box 21 and the seal pressing plate 58 </ b> A attached to the bearing box 21. On the other hand, the seal ring 56 </ b> B and the spacer ring 57 </ b> B adjacent to the seal ring 56 </ b> B are sandwiched between the outer ring pressing plate 55 and the seal pressing plate 58 </ b> B attached to the outer ring pressing plate 55.
The spacer rings (57A, 57B) are provided to restore the sealing performance in case the inner ring presser rings (53A, 53B) are worn due to contact with the seal rings (56A, 56B). That is, when the inner ring retainer rings (53A, 53B) are worn and the sealing performance is lowered, the positions of the seal rings (56A, 56B) and the spacer rings (57A, 57B) are changed, thereby the seal rings (56A, 56B). The sealing performance can be recovered by changing the contact position of the inner ring presser ring (53A, 53B).

In some embodiments, as shown in FIG. 6, the second bearing 22 includes an inner ring 60 fitted on the outer periphery of the rotating shaft 6, an outer ring 61 fitted on the inner periphery of the bearing box 23, and an inner ring. It includes a rolling element 62 provided between 60 and the outer ring 61. Note that the inner ring 60, the outer ring 61, and the bearing box 23 are all continuous annular rings that are seamless in the circumferential direction, and have a so-called seamless structure.
In the exemplary embodiment shown in FIG. 6, the second bearing 22 is a tapered roller bearing in which the rolling elements 62 are tapered rollers. Tapered roller bearings are designed to receive axial loads (thrust loads) and are “thrust bearings”.

In the exemplary embodiment shown in FIG. 6, a pair of inner ring presser rings (63 </ b> A, 63 </ b> B) are provided on both sides of the inner ring 60 of the second bearing 22. That is, the inner ring 60 is disposed so as to be sandwiched between the third inner ring pressing ring 63A located on the side close to the hub 4 and the fourth inner ring pressing ring 63B located on the side far from the hub 4.
The third inner ring pressing ring 63A is fitted to the rotating shaft 6 so as to abut on a second step 6B provided on the rotating shaft 6. Further, on the opposite side of the inner ring 60 across the fourth inner ring presser ring 63B, a presser nut 64 having a female screw that engages with a male screw formed on the outer periphery of the rotary shaft 6 is disposed. Therefore, the inner ring 60 is pressed against the third inner ring presser ring 63A in contact with the second step 6B by the tightening force of the presser nut 64 transmitted to the inner ring 60 via the fourth inner ring presser ring 63B. The direction position is regulated. Note that the axial position of the inner ring 60 may be regulated by using, for example, a tightening force by a shrink disk instead of the tightening force by the presser nut 64.
On the other hand, the outer ring 61 of the second bearing 22 includes a convex portion 23 </ b> A and an outer ring pressing plate 65 attached to the bearing box 23 so as to protrude radially inward from the bearing box 23 along the outer peripheral surface of the rotating shaft 6. The axial position is regulated by being sandwiched. The outer ring 61 may be composed of a pair of annular pieces (61A, 61B) having a trapezoidal cross section and an intermediate piece 61C provided between the annular pieces 61A, 61B.

The bearing box 23 of the second bearing 22 is provided with an internal flow path 26 for supplying lubricating oil to the rolling contact surface between the inner ring 60 or the outer ring 61 and the rolling element 62 in the second bearing 22. The internal flow path 26 penetrates the outer ring 61 and communicates with an annular space between the inner ring 60 and the outer ring 61 (a space in which the rolling elements 62 are disposed). This annular space is filled with lubricating oil supplied via the internal flow path 26.
In some embodiments, seal rings (66A, 66B) are provided to prevent leakage of lubricating oil from the annular space between the inner ring 60 and the outer ring 61. In the exemplary embodiment shown in FIG. 6, the seal ring 66 </ b> A and the spacer ring 67 </ b> A are sandwiched between the bearing box 23 and a seal pressing plate 68 </ b> A attached to the bearing box 23. On the other hand, the seal ring 66 </ b> B and the spacer ring 67 </ b> B are sandwiched between an outer ring pressing plate 65 and a seal pressing plate 68 </ b> B attached to the outer ring pressing plate 65.
The spacer rings (67A, 67B) are provided to restore the sealing performance in case the inner ring presser rings (63A, 63B) are worn due to contact with the seal rings (66A, 66B). That is, when the inner ring retainer rings (63A, 63B) are worn and the sealing performance is lowered, the positions of the seal rings (66A, 66B) and the spacer rings (67A, 67B) are exchanged to thereby change the seal rings (66A, 66B). The sealing performance can be recovered by changing the contact position with the inner ring presser rings (63A, 63B).

Hereinafter, the installation method of the shaft system according to the embodiment will be described in detail.
The shaft system installation method according to some embodiments includes a bearing assembling step for assembling the first bearing 20 and the second bearing 22 to the rotary shaft 6, and the first bearing 20 and the second bearing 22 are coupled by the coupling member 70. And a rotating shaft installation step of installing the rotating shaft 6 on the nacelle base plate 30A. Hereinafter, as an example, a case where the bearing assembly step and the bearing coupling step are performed simultaneously by assembling the coupling member 70 together with the first bearing 20 and the second bearing 22 to the rotating shaft 6 will be described.

In the bearing assembling step and the bearing coupling step, when the shaft system having the above-described configuration is assembled, the first bearing 20 and the second bearing 22 are assembled to the rotating shaft 6 with the rotating shaft 6 standing upright along the vertical direction. Do. An outline of the bearing assembling step and the bearing connecting step in some embodiments is as follows.
That is, the upright rotating shaft 6 is inserted into the first bearing (here, “first bearing” refers to the entire bearing unit including not only the first bearing 20 but also the bearing housing 21). The first bearing is moved relative to the rotary shaft 6 to the first mounting position. Then, the first bearing is assembled to the rotating shaft 6 with the first bearing supported from below and held at the first mounting position. Further, in a state where the first bearing is held at the first mounting position, the spacer (for example, the connecting member 70 shown in FIGS. 8A to 8C) extends upward from the first bearing. The lower end is fixed to the first bearing. Subsequently, the upright rotating shaft 6 is inserted into a second bearing (herein, “second bearing” refers to the entire bearing unit including not only the second bearing 22 but also the bearing housing 23), and The second bearing is moved relative to the rotary shaft 6 to the second mounting position so that the second bearing contacts the upper end of the spacer. Thereafter, the second bearing is fixed to the upper end portion of the spacer. Finally, in a state where the second bearing is fixed to the upper end portion of the spacer, the second bearing is assembled to the rotating shaft 6 at the second mounting position.

  Drawing 7 (a)-(c) is a figure showing the assembly procedure of the 1st bearing 20 to rotating shaft 6 in one embodiment. FIGS. 8A to 8C are diagrams illustrating a procedure for fixing the connecting member 70 to the first bearing 20 in one embodiment. FIG. 9 is a view showing a spigot fitting portion between the connecting member 70 and the first bearing 20. Drawing 10 (a)-(c) is a figure showing the assembly procedure of the 2nd bearing 22 to rotating shaft 6 in one embodiment. FIG. 11 is a view showing a spigot fitting portion between the connecting member 70 and the second bearing 22.

First, as shown in FIG. 7A, the inner ring 50 of the first bearing 20 is fitted to the outer periphery of the rotating shaft 6 with the rotating shaft 6 being upright. In some embodiments, the first inner ring presser ring 53A, the inner ring 50, and the second inner ring presser ring 53B are fitted to the rotary shaft 6 in this order, and the presser nut 54 is formed on the outer peripheral surface of the rotary shaft 6. Screw onto the part.
Specifically, first, the first inner ring pressing ring 53 </ b> A is fitted on the outer periphery of the rotating shaft 6 so as to abut on the first step 6 </ b> A provided on the outer peripheral surface of the rotating shaft 6. Thereafter, the inner ring 50 is fitted on the outer periphery of the rotary shaft 6 so as to contact the first inner ring presser ring 53A. Then, the second inner ring pressing ring 53B is fitted on the outer periphery of the rotary shaft 6 so as to come into contact with the inner ring 50 from the side opposite to the first inner ring pressing ring 53A across the inner ring 50. Finally, the presser nut 54 is screwed onto the male thread portion of the rotary shaft 6 so as to come into contact with the second inner ring presser ring 53B from the side opposite to the inner ring 50 across the second inner ring presser ring 53B. The inner ring 50, the inner ring presser rings (53A, 53B), and the presser nut 54 are all lowered from the upper end portion of the upright rotating shaft 6 toward the lower end portion thereof, to the respective mounting positions on the rotating shaft 6. Move.

  Next, as shown in FIG. 7 (b), the first bearing component assembly in which the outer ring 51 and the rolling element 52 are assembled to the bearing box 21 of the first bearing 20 is lowered along the upright rotating shaft 6, The first bearing 20 is moved to the mounting position (first mounting position) on the rotary shaft 6.

  Then, as shown in FIG. 7 (c), the first bearing component assembly (the assembly of the bearing box 21, the outer ring 51, and the rolling element 52) of the first bearing 20 is supported from below, and the first bearing component assembly is supported. Is held at the first mounting position. At this position, the outer ring 51 of the first bearing component assembly faces the inner ring 50 fitted on the outer periphery of the rotary shaft 6. In some embodiments, the outer ring retainer plate 55, the seal rings (56A, 56B), the spacer rings (57A, 57B), and the seal retainer plate (58A) with the first bearing component assembly held in the first mounting position. , 58B) are attached to the first bearing part assembly. Thus, the assembly of the first bearing 20 to the rotating shaft 6 is completed.

  Since the first bearing 20 is a thrust-free bearing, the first bearing 20 is continuously moved downward until the assembly of the second bearing 22 to the rotating shaft 6 is completed and the rotating shaft 6 is returned to a substantially horizontal posture. And supported at the first mounting position.

  In some embodiments, as shown in FIG. 7C, the bearing box 21 is supported from below via the brake disk 28 when the first bearing component assembly is held at the first mounting position. The holding position of the first bearing component assembly may be adjusted by interposing an annular plate 29 having a thickness adjusted in advance between the brake disk 28 and the bearing housing 21.

Next, the lower end portion of the connecting member 70 is fixed to the first bearing 20 assembled to the rotary shaft 6 so that the connecting member 70 extends upward from the first bearing 20.
In some embodiments, as shown in FIG. 8C, the connecting member 70 includes a first cylindrical member 72 located on the first bearing 20 side and a second cylindrical member 74 located on the second bearing 22 side. And an annular member 76 provided between the first cylindrical member 72 and the second cylindrical member 74. In this case, as shown in FIGS. 8A to 8C, the first cylindrical member 72 is attached to the bearing box 21 of the first bearing 20 held at the first attachment position by support from below, and the first An annular member 76 and a second cylindrical member 74 are connected to the cylindrical member 72. The first cylindrical member 72, the second cylindrical member 74, and the annular member 76 constitute the connecting member 70, as will be described in detail later with reference to FIGS. 13A to 13C. This is because the removal of the lens can be easily performed.

  In one embodiment, when the lower end of the connecting member 70 (first cylindrical member 72) is fixed to the first bearing 20, as shown in FIG. 9, the lower end of the connecting member 70 (first cylindrical member 72) The bearing housing 21 of one bearing 20 is fitted in the spigot fitting part 73. That is, the circular convex part or concave part formed in the lower end part of the connection member 70 (first cylindrical member 72) and the circular concave part or convex part formed in the bearing box 21 are fitted. Thereby, the first bearing 20 is positioned with respect to the connecting member 70 in the radial direction of the rotary shaft 6.

Subsequently, as shown in FIG. 10A, the bearing box 23 of the second bearing 22 is moved downward along the rotating shaft 6 in a state where the rotating shaft 6 is upright, and the bearing box of the second bearing 22 is moved. 23 is fixed to the upper end of the connecting member 70 (second cylindrical member 74). Thereby, the attachment position of the axial direction to the rotating shaft 6 of the 2nd bearing 22 becomes settled in a 2nd attachment position. That is, the length of the connecting member 70 is set such that the axial mounting position of the second bearing 22 on the rotating shaft 6 is determined as the second mounting position. Thus, the second bearing 22 is assembled to the rotary shaft 6 at the second mounting position that is separated from the first mounting position where the first bearing 20 is held by a distance corresponding to the length of the connecting member 70. .
The third inner ring presser ring 63A located on the hub 4 side of the inner ring presser rings (63A, 63B) has an outer periphery of the rotary shaft 6 so as to abut on a second step 6B provided on the outer peripheral surface of the rotary shaft 6. To be fitted in advance. Furthermore, the first piece 61 </ b> A located on the first bearing 20 side of the pair of annular pieces (61 </ b> A, 61 </ b> B) is fitted to the inner periphery of the bearing box 23.

  In one embodiment, when the bearing box 23 of the second bearing 22 is fixed to the upper end portion of the connecting member 70 (second cylindrical member 74), as shown in FIG. 11, the connecting member 70 (second cylindrical member 74) The upper end portion and the bearing box 23 of the second bearing 22 are fitted in the spigot fitting portion 75. That is, the circular convex part or concave part formed in the upper end part of the connection member 70 (2nd cylindrical member 74) and the circular concave part or convex part formed in the bearing box 23 fit. Thereby, the second bearing 22 is positioned with respect to the connecting member 70 in the radial direction of the rotary shaft 6.

  Thus, by positioning the first bearing 20 and the second bearing 22 in the radial direction with respect to the connecting member 70 by the inlay fitting portions (73, 75) with the connecting member 70, the first bearing 20 and The second bearing 22 can be aligned.

Further, as shown in FIG. 10B, the second bearing component assembly including the inner ring 60 and the rolling element 62 is fitted on the outer peripheral surface of the rotating shaft 6 at the second mounting position, and the intermediate piece 61C is mounted on the bearing box. 23. Thereafter, the second piece 61B located on the side far from the first bearing 20 among the annular pieces (61A, 61B) is fitted into the bearing housing 23, and the rolling element 62 is provided between the inner ring 60 and the outer ring 61. A bearing 22 is obtained.
Further, in order to regulate the axial position of the inner ring 60, a fourth inner ring holding ring 63B located on the side farther from the hub 4 of the inner ring holding rings (63A, 63B) is fitted on the outer periphery of the rotary shaft 6 and rotated. A presser nut 64 is screwed onto a male screw portion formed on the outer peripheral surface of the shaft 6.
Then, the outer ring retainer plate 65, the seal rings (66A, 66B), the spacer rings (67A, 67B) and the seal retainer plates (68A, 68B) are attached to the bearing box 23.

  Thus, as shown in FIG. 10C, the assembly of the second bearing 22 to the rotating shaft 6 at the second mounting position is completed. Thereafter, the rotating shaft 6 in which the first bearing 20 and the second bearing 22 are assembled is returned to a substantially horizontal posture. In addition, since the 2nd bearing 22 is designed to receive a thrust load, after the 2nd bearing 22 is assembled | attached to the rotating shaft 6, the support from the downward direction of the 1st bearing 20 becomes unnecessary.

Next, the step of installing the rotating shaft 6 assembled with the first bearing 20 and the second bearing 22 on the nacelle 30 will be described.
FIG. 12 is a view showing a state in which the rotating shaft 6 assembled with the first bearing 20 and the second bearing 22 is installed in the nacelle 30. FIGS. 13A to 13C are diagrams illustrating a procedure for removing the connecting member 70 from the bearing boxes 21 and 23. 14A is a diagram of the first bearing viewed from the axial rear side of the rotating shaft, and FIG. 14B is a diagram of the second bearing viewed from the axial rear side of the rotating shaft. 15A is a perspective view showing a fitting portion between the bearing box and the nacelle base plate, FIG. 15B is a front view showing the fitting portion between the bearing case and the nacelle base plate, and FIG. It is a perspective view which shows the structural example of a liner and a shim.

In some embodiments, the first bearing and the second bearing connected by the connecting member 70 (the “first bearing” or the “second bearing” referred to here is only the first bearing 20 or the second bearing 22). And the entire bearing unit including the bearing boxes 21 and 23), and the rotating shaft 6 is installed on the nacelle base plate 30A. At this time, as shown in FIG. 12, in a state where the bearing boxes 21 and 23 are connected to each other by the connecting member 70, the rotary shaft 6 is lifted together with the first bearing and the second bearing by the lifting device, and is placed on the nacelle base plate 30A. Move. Then, the bearing boxes 21 and 23 are placed on the nacelle base plate 30A.
When the rotary shaft 6 is lifted by the lifting device, an angle corresponding to the tilt angle α is formed between the center line C and the horizontal line H of the rotary shaft 6. Therefore, the axial component of the rotating shaft 6 corresponding to the tilt angle α acts on the first bearing (thrust-free bearing) 20, and the first bearing 20 moves or the first bearing 20 is damaged. There is a possibility of receiving. In this regard, as described above, by performing the lifting operation of the rotating shaft 6 in a state where the first bearing 20 and the second bearing 22 are connected by the connecting member 70, it is possible to prevent displacement and damage of the first bearing 20.

Moreover, in one Embodiment, as shown to Fig.13 (a)-(c), after mounting the rotating shaft 6 on the nacelle baseplate 30A, the bearing box 21 of the 1st bearing 20 and the 2nd bearing 22 of FIG. The connecting member 70 that has connected the bearing box 23 is removed.
Specifically, as shown in FIG. 13A, the annular member 76 provided between the first cylindrical member 72 and the second cylindrical member 74 is removed, and the first cylindrical member 72 and the second cylindrical member are removed. 74 are moved along the rotary shaft 6 in directions away from the first bearing 20 and the second bearing 22 (see arrows in the figure). Thereby, the spigot fitting part 73 (refer FIG. 9) between the 1st cylindrical member 72 and the bearing case 21 and the spigot fitting part 75 (refer FIG. 11) between the 2nd cylindrical member 74 and the bearing case 23 are cancelled | released. Is done. Thereafter, as shown in FIG. 13B, the pair of half shells 72A and 72B constituting the first cylindrical member 72 are separated from each other and the pair of half shells 74A and 74B constituting the second cylindrical member 74 are separated from each other. Separate from each other. Thereby, as shown in FIG.13 (c), the rotating shaft 6 covered with the connection member 70 is exposed.
A gap G (corresponding to the thickness of the annular member 76) formed between the first cylindrical member 72 and the second cylindrical member 74 by removing the annular member 76 releases the spigot fitting portions 73 and 75. It is set large enough to be possible.

Further, in one embodiment, as shown in FIGS. 14A and 14B, the horizontal position of the bearing box 21 of the first bearing 20 and the bearing box 23 of the second bearing 22 after removing the connecting member 70. May be fixed to the nacelle base plate 30A after fine adjustment. The horizontal direction is the horizontal direction H orthogonal to the axis of the rotating shaft 6.
As shown in FIG. 14A, the bearing box 21 includes a main body portion 211 in which the first bearing 20 is accommodated, a shaft hole 212 through which the rotary shaft 6 is inserted, and a pair of shaft holes 212 provided on both sides of the shaft hole 212. And mounting portions 213 and 213. Bolt holes 214 are provided in the pair of attachment portions 213 and 213, respectively. Further, the bearing housing 21 is provided with a convex portion 215 extending in the axial direction of the rotary shaft 6, that is, in the axial direction of the shaft hole 212. The convex part 215 is located in the site | part which opposes the nacelle baseplate 30A. In the figure, as an example, an example provided below the shaft hole 212 is shown.
The nacelle base plate 30 </ b> A is provided with bolt holes 35 at portions corresponding to the bolt holes 214 of the bearing box 21. The nacelle base plate 30 </ b> A is provided with a recess 38 extending in the axial direction of the rotary shaft 6 at a portion corresponding to the protrusion 215 of the bearing box 21.

As shown in FIG. 15A, the width W ₂ of the concave portion 38 of the nacelle base plate 30A is the width W ₁ of the convex portion 215 of the bearing box 21 so that the position in the horizontal direction H of the bearing case 21 can be finely adjusted. Formed larger.
When the horizontal position of the bearing housing 21 of the first bearing 20 is finely adjusted, the bearing housing 21 is mounted on the nacelle base plate 30A so that the convex portion 215 fits into the concave portion 38 as shown in FIG. After that, the liner 91 extending in a substantially vertical direction is inserted between the convex portion 215 and the concave portion 38. The horizontal position of the bearing box 21 of the first bearing 20 can be finely adjusted by appropriately selecting the thickness of the liner 91 to be inserted. At this time, in addition to the liner 91, a shim 95 thinner than the liner 91 may be inserted between the convex portion 215 and the concave portion 38. The horizontal position of the bearing housing 21 can be finely adjusted by inserting a plurality of shims 95. For example, as illustrated in FIG. 15C, the liner 91 may have an L shape, and a bolt hole 92 may be provided on one surface. The shim 95 may have a flat plate shape. As shown in FIG. 15B, after inserting the liner 91 between the convex portion 215 and the concave portion 38, the bolt 93 is inserted into the bolt hole 92 and the bolt hole 216 formed in the nacelle base plate 30A (FIG. 15A). )), The liner 91 may be fixed to the nacelle base plate 30A.

As illustrated in FIG. 14B, the bearing box 23 includes a pair of body portions 231 in which the second bearing 22 is accommodated, a shaft hole 232 through which the rotary shaft 6 is inserted, and a pair of shaft holes 232. And mounting portions 233 and 233. Bolt holes 234 are provided in the pair of attachment portions 233 and 233, respectively. The bearing box 23 is provided with a convex portion 235 extending in the axial direction of the rotary shaft 6. The nacelle base plate 30 </ b> A is provided with bolt holes 36 at portions corresponding to the bolt holes 234 of the bearing box 23 . The nacelle base plate 30 </ b> A is provided with a recess 39 that extends in the axial direction of the rotary shaft 6 at a portion corresponding to the protrusion 235 of the bearing box 23.
Similar to the bearing housing 21 of the first bearing 20, after the bearing housing 23 is placed on the nacelle base plate 30 </ b> A so that the convex portion 235 fits into the concave portion 39, the liner 91 is interposed between the convex portion 235 and the concave portion 39. To adjust the relative horizontal position of the bearing box 23 of the second bearing 22 and the nacelle base plate 30A. At this time, in addition to the liner 91, a shim 95 (see FIG. 15C) thinner than the liner 91 may be inserted between the convex portion 235 and the concave portion 39.
14 and 15 exemplify the case where the convex portions 215 and 235 are provided on the bearing housings 21 and 23 side and the concave portions 38 and 39 are provided on the nacelle base plate 30A side. A concave portion may be provided on the 23 side, and a convex portion may be provided on the nacelle base plate 30A side.

  Then, after finely adjusting the horizontal positions of the bearing boxes 21 and 23 as described above, as shown in FIGS. 14A and 14B, the bolt 90, the bolt holes 214 and 234, and the bolt holes 35, 36, the bearing boxes 21 and 23 are fixed to the nacelle base plate 30A.

  As described above, since the convex portions 215 and 235 formed on one of the bearing boxes 21 and 23 and the nacelle base plate 30A and the concave portions 38 and 39 formed on the other are fitted, a simple configuration is achieved. With this, fixing in the horizontal direction H can be realized. Further, since the liner 91 is interposed between the convex portions 215 and 235 and the concave portions 38 and 39, the relative positions of the bearings 21 and 23 and the nacelle base plate 30A are finely adjusted. By using the liner 91, the bearings 21, 23 can be fixed in a state of being positioned with high accuracy.

In another embodiment, the bearing boxes 21 and 23 may be fixed to the nacelle base plate 30A using a shear pin after finely adjusting the horizontal position of the bearing boxes 21 and 23 of the bearings 20 and 22.
FIG. 16 is a diagram showing a positioning configuration of the bearing boxes 21 and 23 using the shear pins. FIG. 17 is a cross-sectional view around a shear pin.
As shown in FIG. 16, the bearing box 21 whose horizontal position is finely adjusted is positioned in the horizontal direction by a pair of shear pins 99 provided on both sides of the shaft hole 212. Similarly, the bearing housing 23 is positioned in the horizontal direction by a pair of shear pins 99 provided on both sides of the shaft hole 232.
As a result of fine adjustment of the horizontal position of the bearing housings 21 and 23, the pin holes 221 provided in the mounting portions 213 and 233 of the bearing housings 21 and 23 and the pin holes 223 provided in the nacelle base plate 30A The position may shift. In this case, the eccentric sleeves 220 and 222 may be fitted into the pin holes 221 and 223, the positions of the holes of the eccentric sleeves 220 and 222 may be aligned, and the shear pin 99 may be inserted into the holes.

  Moreover, in one Embodiment, as shown to Fig.14 (a), (b), between the bearing case 21 of the 1st bearing 20, the bearing case 23 of the 2nd bearing 22, and the nacelle baseplate 30A, respectively, it is substantially. You may adjust the height of the 1st bearing 20 and the 2nd bearing 22 with respect to the nacelle baseplate 30A by interposing the shims 97 and 98 extended in a horizontal direction. Thereby, the 1st bearing 20 and the 2nd bearing 22 can be accurately positioned also to a height direction.

  In another embodiment, the connecting member 70 remains even after the rotary shaft 6 is installed on the nacelle base plate 30 </ b> A, and is connected as a connecting member between the first bearing 20 and the second bearing 22 during operation of the wind turbine generator 1. The member 70 is used. In this case, the connecting member 70 may be replaced with a configuration including the first cylindrical member 72, the second cylindrical member 74, and the annular member 76, and the connecting member 40 shown in FIGS.

As described above, according to the above-described embodiment, when the rotary shaft 6 is installed on the nacelle base plate 30A, the first bearing 20 and the second bearing 22 are maintained substantially concentrically by the connecting member 70. Therefore, the first bearing 20 and the second bearing 22 can be positioned with high accuracy.
Further, since the bearing box 21 of the first bearing 20 and the bearing box 23 of the second bearing 22 are configured separately and are connected by the connecting member 70, each high-quality and high-precision bearing box. Can be easily manufactured.

  As mentioned above, although embodiment of this invention was described in detail, it cannot be overemphasized that this invention is not limited to this, In the range which does not deviate from the summary of this invention, various improvement and deformation | transformation may be performed.

For example, in the above-described embodiment, the bearing box 21 of the first bearing 20 and the bearing box 23 of the second bearing 22 are connected by the connecting member 40, but instead of the connecting member 40 or in addition to the connecting member 40. Thus, the bearing boxes 21 and 23 may be connected by a connecting frame.
FIG. 18 is a perspective view showing the internal structure of the nacelle of the wind turbine generator having a connection frame between the bearing boxes 21 and 23. As shown in the figure, the connecting frame 100 includes a connecting plate portion 102 provided above the rotating shaft 6 to connect the upper portions of the bearing boxes 21 and 23, and the connecting plate portion 102 on both sides of the rotating shaft 6. A pair of legs 104 supported by the base plate 30A may be included. As a result, the upper parts of the bearing boxes 21 and 23 are connected by the connecting plate portion 102, thereby contributing to maintaining concentricity between the bearings 20 and 22.
Moreover, you may adjust the height of the connection frame 100 with respect to the nacelle baseplate 30A by interposing the shim 110 between the leg part 104 and the nacelle baseplate 30A, respectively. In adjusting the height, a shim 110 having an appropriate thickness is interposed so that the first bearing 20 and the second bearing 22 are concentric, or a plurality of shims 110 are provided so as to have an appropriate thickness. The height of each bearing box 21 and 23 is adjusted by interposing. Thereby, according to the height of the bearing boxes 21 and 23 of each bearing 20 and 21, the height of the connection frame 100 can be adjusted appropriately.

DESCRIPTION OF SYMBOLS 1 Wind power generator 2 Blade 3 Rotor 4 Hub 5 Hub cover 6 Rotating shaft 6A 1st level | step difference 6B 2nd level | step difference 8 Tower 10 Drive train 12 Hydraulic pump 13 High pressure oil line 14 Hydraulic motor 15 Low pressure oil line 16 Generator 20 1st bearing 21 Bearing box 22 Second bearing 23 Bearing box 24 Internal flow path 26 Internal flow path 27 Brake caliper 28 Brake disc 30 Nacelle 30A Nacelle base plate 30B Nacelle cover 30C Nacelle frame 38, 39 Concave part 40 Connecting member 42 Notch 46 Equipment installation base 50 Inner ring 51 Outer ring 52 Rolling element 53A First inner ring presser ring 53B Second inner ring presser ring 54 Presser nut 55 Outer ring presser plate 56A, 56B Seal ring 57A, 57B Spacer ring 58A, 58B Seal presser plate 60 Inner ring 61 Outer ring 6 Rolling element 63A Third inner ring presser ring 63B Fourth inner ring presser ring 64 Presser nut 65 Outer ring presser plate 66A, 66B Seal ring 67A, 67B Spacer ring 68A, 68B Seal presser plate 70 Connecting member 72 First cylindrical member 73 Inlay fitting portion 74 Second cylindrical member 75 Inlay fitting portion 76 Ring member 80 Connection frame 82 Connection plate portion 84 Support portion 90, 93 Bolt 95, 96, 97, 98 Shim 99 Eccentric pin 100 Connection frame 102 Connection plate portion 211, 231 Main body portion 212,232 Shaft hole 213,233 Mounting part 214,234 Bolt hole 215,235 Convex part 216,236 Bolt hole

Claims (16)

At least one blade, a hub to which the at least one blade is attached, a rotating shaft connected to the hub, a first bearing and a second bearing that pivotally support the rotating shaft, and each bearing from below A method of installing a shaft system of a regenerative energy type power generation apparatus having a nacelle including a nacelle base plate to be supported,
Assembling the first bearing and the second bearing to the rotary shaft;
Connecting the bearing box of the first bearing and the bearing box of the second bearing with a connecting member such that the first bearing and the second bearing are concentric;
Installing the rotary shaft on the nacelle base plate together with the first bearing and the second bearing in a state where the concentricity between the first bearing and the second bearing is maintained by the connecting member. A method for installing a shaft system of a regenerative energy type power generator characterized by the above.   In the step of connecting by the connecting member, the bearing box of the first bearing and the bearing box of the second bearing are respectively positioned in the radial direction of the rotating shaft with respect to the connecting member by inlay fitting. The installation method of the axis | shaft system of the regenerative energy type electric power generating apparatus of Claim 1 to do.   In the step of assembling the first bearing and the second bearing, the first bearing and the second bearing, which are each formed in a seamless annular shape, in the state where the rotary shaft is erected along the vertical direction are sequentially arranged. The shaft installation method of the regenerative energy type power generator according to claim 1, wherein the shaft is inserted into the rotating shaft.   In the step of installing the rotating shaft, the first bearing and the second bearing are moved to the nacelle so as to prevent displacement of the first bearing and the second bearing in at least a horizontal direction orthogonal to the axial direction of the rotating shaft. The shaft system installation method of the regenerative energy type power generator according to claim 1, wherein the shaft system is fixed to a base plate.   In the step of installing the rotating shaft, the horizontal position of at least one of the first bearing and the second bearing with respect to the nacelle base plate is finely adjusted, and the first bearing and the The method for installing a shaft system of a regenerative energy type power generator according to claim 4, wherein the second bearing is fixed to the nacelle base plate.   In the step of installing the rotary shaft, a convex portion formed on one of the bearings and the nacelle base plate and extending in the axial direction of the rotary shaft, and formed on the other of the bearings and the nacelle base plate The first bearing and the second bearing are placed on the nacelle base plate so that the concave portion extending in the axial direction is fitted, and a liner is interposed between the convex portion and the concave portion, 6. The method for installing a shaft system of a regenerative energy type power generator according to claim 5, wherein the relative position between each bearing and the nacelle base plate in the horizontal direction is finely adjusted.   In the step of installing the rotating shaft, the relative positions of the first bearing and the second bearing and the nacelle base plate are finely adjusted, and the respective bearings are moved using the eccentric pins in a state where the relative position is finely adjusted. The method for installing a shaft system of a regenerative energy generator according to claim 4, wherein the shaft system is fixed to a nacelle base plate.   In the step of installing the rotating shaft, shims are interposed between the first bearing and the second bearing and the nacelle base plate, respectively, so that the first bearing and the second bearing with respect to the nacelle base plate are disposed. The method for installing a shaft system of a regenerative energy generator according to claim 1, wherein the height is adjusted.   In the step of installing the rotating shaft, after the rotating shaft is installed on the nacelle base plate, the upper part of the bearing box of the first bearing and the upper part of the bearing box of the second bearing are connected by a connecting frame. The installation method of the shaft system of the renewable energy type electric power generating apparatus of Claim 1.   In the step of installing the rotating shaft, a shim is interposed between the leg portion of the connection frame that connects the first bearing and the second bearing, and the nacelle base plate. The method for installing a shaft system of a regenerative energy power generator according to claim 9, wherein after adjusting the height of the connection frame, the leg portion is fixed to the nacelle base plate.   The connecting member remains even after the rotary shaft is installed on the nacelle, and is used for connecting the bearing housing of the first bearing and the bearing housing of the second bearing during operation of the regenerative energy power generation device. The method for installing a shaft system of a regenerative energy power generator according to claim 1, wherein the shaft system is used. A regenerative energy power generation device that generates power using renewable energy,
At least one blade,
A hub to which the at least one blade is attached;
A rotating shaft coupled to the hub;
A first bearing and a second bearing that pivotally support the rotating shaft;
A nacelle including a nacelle base plate that supports each bearing from below;
A connecting member that connects the first bearing and the second bearing such that the first bearing and the second bearing are concentric;
The first bearing and one end of the connecting member are positioned in the radial direction by inlay fitting, and the second bearing and the other end of the connecting member are positioned in the radial direction by inlay fitting, The regenerative energy type power generating device, wherein the first bearing and the second bearing are connected to each other by the connecting member so as to be concentric. A driven device attached to an end of the rotating shaft far from the hub and supported by the nacelle base plate and driven by the rotating shaft;
The regenerative energy type power generator according to claim 12, wherein the first bearing is a radial bearing and is located on the hub side, and the second bearing is a thrust bearing and is located on the driven device side.   14. The method for installing a shaft system of a regenerative energy generator according to claim 13, wherein the first bearing is a double row cylindrical roller bearing, and the second bearing is a double row conical roller bearing. The first bearing and the second bearing include the first bearing located on the hub side, and the second bearing provided at a position farther from the hub than the first bearing,
The rotating shaft has a first region to which the first bearing is attached and a second region to which the second bearing is attached, and the rotating shaft is directed from the first region side toward the second region side. The diameter has been reduced,
A first step portion for restricting movement of the inner ring of the first bearing to the hub side is formed in the first area, and the inner ring of the second bearing toward the hub side is formed in the second area. A second step portion for restricting movement is formed,
The regenerative energy type power generator according to claim 12, wherein an inner diameter of the inner ring of the first bearing is larger than a maximum diameter of the second stepped portion.   The renewable energy type power generator according to claim 12, wherein the renewable energy type power generator is a wind power generator that generates electric power from wind as the renewable energy.

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