JP2007244154A - Conical roller bearing, spacer, ring-like member, conical roller bearing assembling method, and main-spindle support structure for wind generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conical roller bearing that prevents falling-off of spacers. <P>SOLUTION: The conical roller bearing includes an outer ring, an inner ring 23, a plurality of conical rollers 24a, 24b, and a plurality of spacers 11a, 11b, respectively arranged between the conical rollers 24a, 24b adjacent to each other. The conical roller bearing is provided with a spacer-type retainer, in which a plurality of the spacers 11a, 11b are mutually separately provided. The spacer 11a is provided with an inside-diameter side roller stop part 16 for preventing the conical rollers 24a, 24b from falling off to the inner diameter side. Here, when the conical rollers 24a, 24b and the spacers are arranged successively, continuously, and alternately in the circumferential direction without gaps, a circumferential length L2 of the inner-diameter side roller stop part 16 intersecting with a plane, including a roller pitch circle diameter, is longer than the circumferential length L1 of the last gap 27 in the roller circle diameter between the first-arranged conical roller 24a and the last-arranged conical roller 24b. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a tapered roller bearing, a spacer, a ring-shaped member, a method for assembling a tapered roller bearing, and a main shaft support structure for a wind power generator, and in particular, a large tapered roller bearing, a spacer included therein, a ring-shaped member, The present invention relates to an assembling method and a main shaft support structure of a large-scale wind power generator.

  The roller bearing is generally composed of an outer ring, an inner ring, a plurality of rollers disposed between the outer ring and the inner ring, and a cage that holds the plurality of rollers. There are various types of cages for holding rollers, such as press cages, shaving cages, welded cages, and pin type cages, depending on the material and manufacturing method. ing. In addition, the cage is usually composed of a single piece, that is, an annular part.

  A roller bearing that supports a main shaft of a wind power generator to which a blade for receiving wind is attached needs to receive a large load, so that the roller bearing itself is also large. If it does so, each structural member which comprises a roller bearing, such as a roller and a holder | retainer, will also become large sized, and production and assembly of a member will become difficult. In such a case, if each member is divided, production and assembly are facilitated.

Here, in a ball bearing, a technique related to a split type spacer type cage in which the cage is divided is described in Japanese Utility Model Laid-Open No. 5-92537 (Patent Document 1).
Japanese Utility Model Publication No. 5-92537 (paragraph number 0007, FIG. 1)

  Since the press retainer and the pin retainer described above have an annular portion that is continuous in the circumferential direction, there is little possibility that the retainer will fall off the inner ring or the like during assembly.

  However, in the case of a spacer type retainer, each spacer is arranged between adjacent tapered rollers, and each spacer is not connected in the circumferential direction. There is a risk of falling off.

  An object of the present invention is to provide a tapered roller bearing that prevents a spacer from falling off.

  Another object of the present invention is to provide a spacer with no risk of dropping off.

  Still another object of the present invention is to provide a side wheel that can be easily assembled.

  Still another object of the present invention is to provide a method of assembling a tapered roller bearing that is easy to assemble.

  Still another object of the present invention is to provide a main shaft support structure for a wind power generator with good productivity.

  A tapered roller bearing according to the present invention is arranged between an outer ring, an inner ring, a plurality of tapered rollers arranged in a circumferential direction between the outer ring and the inner ring, and adjacent tapered rollers, and has a roller pitch circle diameter. Including a plurality of spacers in which the interval between the surfaces contacting the adjacent tapered rollers gradually increases from the small-diameter side end surface of the tapered roller toward the large-diameter side end surface, and the plurality of spacers are provided separately from each other And a spacer type retainer. The spacer is provided with an inner diameter side roller stopper for preventing the tapered roller from dropping off toward the inner diameter side. Here, the circumferential length of the inner diameter side roller stopper that intersects the plane including the roller pitch circle diameter is the first when the tapered rollers and spacers are successively connected in the circumferential direction and arranged without gaps alternately. It is longer than the circumferential length of the gap in the roller pitch circle diameter of the tapered roller arranged last and the tapered roller arranged last.

  When the tapered rollers and the spacers are alternately arranged in the circumferential direction, an appropriate gap is provided in the circumferential direction. Here, if the circumferential length of the gap is large, the spacer disposed between the adjacent tapered rollers may fall off to the outer diameter side. However, with this configuration, even when the spacer is about to move to the outer diameter side, the inner diameter side roller stopper provided in the spacer is caught by the adjacent tapered roller. Accordingly, it is possible to prevent the spacer from falling off.

  Preferably, the spacer is provided with an outer diameter side roller stopper for preventing the tapered roller from falling off to the outer diameter side. Here, the circumferential length of the outer diameter side roller stopper that intersects the plane including the roller pitch circle diameter is longer than the circumferential length of the inner diameter roller stopper that intersects the plane including the roller pitch circle diameter. . If there is a gap in the circumferential direction as described above, the tapered roller disposed between the adjacent spacers may fall off to the outer diameter side. However, with this configuration, even if the tapered roller moves toward the outer diameter side, the tapered roller is caught by the outer diameter side roller stopper of the adjacent spacer. Therefore, it is possible to prevent the tapered roller from falling off.

  More preferably, a ring-shaped member is provided that extends in an annular shape so as to contact all the spacers arranged in the circumferential direction and maintains the contact state between the raceway surface of the inner ring and the spacer. By doing so, when the tapered roller bearing is assembled, the contact state between the inner ring and the spacer can be maintained by the ring-shaped member, and further, the spacer can be prevented from falling off.

  In another aspect of the present invention, when the spacer is disposed between the adjacent tapered rollers, the distance between the surfaces contacting the adjacent tapered rollers in the roller pitch circle diameter is large from the small diameter side end surface of the tapered rollers. An inner diameter side roller stopper for preventing the tapered roller from dropping off toward the inner diameter side is provided which gradually increases toward the radial end surface. Here, the circumferential length of the inner diameter side roller stopper that intersects the plane including the roller pitch circle diameter is the first when the tapered rollers and spacers are successively connected in the circumferential direction and arranged without gaps alternately. It is longer than the circumferential length of the gap in the roller pitch circle diameter of the tapered roller arranged last and the tapered roller arranged last.

  Even if such a spacer moves to the outer diameter side, the inner diameter side roller stopper provided in the spacer is caught by the adjacent tapered roller. Therefore, falling off to the outer diameter side is prevented.

  In still another aspect of the present invention, the ring-shaped member is used when a plurality of tapered rollers and a plurality of spacers arranged between adjacent tapered rollers are alternately arranged on the inner ring. And it extends in an annular shape so as to abut on all the spacers arranged in the circumferential direction, and maintains the abutting state between the raceway surface of the inner ring and the spacer.

  Such a ring-shaped member can maintain the contact state between the inner ring and the spacer when the tapered rollers and the spacer are alternately arranged on the inner ring. Therefore, at the time of assembling, the spacer can be prevented from falling off to the outer diameter side, and assembling is facilitated.

  In still another aspect of the present invention, a method for assembling a tapered roller bearing includes an outer ring, an inner ring, a plurality of tapered rollers disposed between the outer ring and the inner ring, and an adjacent tapered roller. The pitch circle diameter includes a plurality of spacers in which the distance between the surfaces contacting the adjacent tapered rollers gradually increases from the small diameter end surface to the large diameter end surface of the tapered rollers, and the plurality of spacers are separated from each other. Assembly method of the tapered roller bearing for assembling the tapered roller bearing comprising the spacer type retainer provided in the above and a ring-shaped member extending annularly so as to contact all the circumferentially disposed spacers It is. Here, the method for assembling the tapered roller bearing is such that, when a plurality of tapered rollers and a plurality of spacers are alternately arranged in the circumferential direction on the inner ring, the ring-shaped member makes contact between the inner ring and the spacer. To maintain.

  By comprising in this way, when a tapered roller and a spacer are alternately arrange | positioned on an inner ring | wheel by a ring-shaped member, the contact state of an inner ring | wheel and a spacer can be maintained. Therefore, assembly becomes easy.

  In still another aspect of the present invention, the main shaft support structure of the wind power generator includes a blade that receives wind power, a main shaft that is fixed to the blade, one end of which is fixed to the blade, and the main shaft that rotates together with the blade. 1 is a main shaft support structure of a wind power generator having a tapered roller bearing to be supported on the main body. The tapered roller bearing includes an outer ring, an inner ring, a plurality of tapered rollers arranged in a circumferential direction between the outer ring and the inner ring, and a tapered roller arranged between adjacent tapered rollers and adjacent in the roller pitch circle diameter. Including a plurality of spacers whose intervals between the surfaces abutting on the tapered rollers gradually increase from the small-diameter side end surface toward the large-diameter side end surface, and the plurality of spacers are provided separately from each other. A mold holder. The spacer is provided with an inner diameter side roller stopper for preventing the tapered roller from dropping off toward the inner diameter side. Here, the circumferential length of the inner diameter side roller stopper that intersects the plane including the roller pitch circle diameter is the first when the tapered rollers and spacers are successively connected in the circumferential direction and arranged without gaps alternately. It is longer than the circumferential length of the gap in the roller pitch circle diameter of the tapered roller arranged last and the tapered roller arranged last.

  Since the main shaft support structure of such a wind power generator includes a tapered roller bearing with good assemblability, the productivity is good.

  According to this invention, even when the spacer is about to move to the outer diameter side, the inner diameter side roller stopper provided in the spacer is caught by the adjacent tapered roller. Accordingly, it is possible to prevent the spacer from falling off.

  Moreover, even if such a spacer is going to move to an outer diameter side, the inner diameter side roller stopper provided in the spacer is caught by the adjacent tapered roller. Therefore, falling off to the outer diameter side is prevented.

  Further, such a ring-shaped member can maintain the contact state between the inner ring and the spacer when the tapered roller and the spacer are arranged on the inner ring. Can be prevented from falling off.

  Further, in the method of assembling such a tapered roller bearing, the spacer does not fall off from the inner ring side at the time of assembling. Therefore, the assemblability is improved.

  Moreover, since the main shaft support structure of such a wind power generator includes a tapered roller bearing with good assemblability, the productivity is good.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a view showing the spacer 11 included in the spacer type holder according to the embodiment of the present invention. Referring to FIG. 2, spacer 11 is disposed between adjacent tapered rollers such that upper surface 14a faces the outer ring and lower surface 14b faces the inner ring. The spacer 11 includes guide surfaces 12a and 12b having curved surfaces along the rolling surfaces of the tapered rollers. When arranged between the adjacent tapered rollers, the circumferential distance between the guide surface 12a and the guide surface 12b, which is a surface that contacts the adjacent tapered rollers in the roller pitch circle diameter, is larger than the smaller diameter side end surface 13a. It gradually increases toward the side end face 13b. By doing so, when the spacer 11 is disposed between the adjacent tapered rollers, the spacer 11 can be disposed along the rolling surface of the tapered roller, and the roller length direction between the tapered roller and the spacer 11 can be increased. The interval can be kept constant.

  On the inner diameter side of the spacer 11, that is, on the lower surface 14 b side, an inner diameter side roller stopper 16 that prevents the adjacent tapered rollers from falling off to the inner diameter side is provided. Even if the tapered roller moves toward the inner diameter side, the inner diameter side roller stopper 16 of the adjacent spacer 11 is caught by the tapered roller, and the tapered roller can be prevented from dropping out toward the inner diameter side. Further, even when the spacer 11 is about to move to the outer diameter side, the inner diameter side roller stopper 16 is caught by the adjacent tapered rollers, and the spacer 11 can be prevented from falling off to the outer diameter side. .

  On the outer diameter side of the spacer 11, that is, on the upper surface 14a side, an outer diameter side roller stopper 17 that prevents the adjacent tapered rollers from falling off to the outer diameter side is provided. Even if the tapered roller moves to the outer diameter side, the outer diameter side roller stopper 17 of the adjacent spacer is caught by the tapered roller, and the tapered roller can be prevented from falling off to the outer diameter side. Further, the spacer 11 can be prevented from dropping out toward the inner diameter side.

  The inner diameter side roller stopper 16 and the outer diameter side roller stopper 17 are provided continuously in the axial direction of the spacer 11.

  The small-diameter side end surface 13a and the large-diameter side end surface 13b of the spacer 11 have a small-diameter side protrusion 15a and a large-diameter side that respectively contact the small end surface and large end surface of the tapered roller when arranged between adjacent tapered rollers. A protruding portion 15b is provided. By configuring in this way, as will be described later, the contact state between the spacer 11 and the inner ring can be maintained by using the small-diameter side protruding portion 15a and the large-diameter side protruding portion 15b. The axial movement of the spacer 11 can also be restricted by bringing the small-diameter side protrusion 15a and the large-diameter side protrusion 15b into contact with the small end surface and large end surface of the adjacent tapered rollers.

  FIG. 3 is a cross-sectional view of the tapered roller bearing 21 including the spacer type cage including the spacer 11 shown in FIG. 2 and 3, the tapered roller bearing 21 includes an outer ring 22, an inner ring 23, a plurality of tapered rollers 24 disposed between the outer ring 22 and the inner ring 23, and adjacent tapered rollers 24. A plurality of spacers 11 are arranged, and a plurality of spacers 11 are provided separately from each other, and a circle so as to abut against all the spacers 11 arranged in the circumferential direction. A small-diameter side wheel 25a and a large-diameter side wheel 25b are provided as ring-shaped members extending in an annular shape. The small diameter side wheel 25 a is disposed on the small collar 28 a side of the inner ring 23, and the large diameter side wheel 25 b is disposed on the large collar 28 b side of the inner ring 23. The spacer 11 is disposed between the adjacent tapered rollers 24 such that the guide surfaces 12 a and 12 b face the rolling surfaces of the tapered rollers 24. The small-diameter side wheel 25a and the large-diameter side wheel 25b are arranged so that the protruding portions 26a and 26b provided on the small-diameter side wheel 25b and the large-diameter side wheel 25b are positioned on the small-diameter side protrusion 15a and the large-diameter side protrusion 15b, respectively. Abutting on the spacer 11, the abutting state between the inner ring 23 and the spacer 11 is maintained.

  In FIG. 1, the spacer 11a disposed between the first tapered roller 24a and the last tapered roller 24b provided in the tapered roller bearing 21 shown in FIG. 3 is cut along a plane including the roller pitch circle diameter. It is sectional drawing in the case. From the viewpoint of easy understanding, FIG. 1 does not show the small-diameter side protruding portion 15a and the large-diameter side protruding portion 15b provided in the spacer 11a.

  Referring to FIG. 1, a last clearance 27 is provided between the first tapered roller 24a and the last tapered roller 24b. The last gap 27 is caused by a gap in consideration of accumulation of dimensional errors in the circumferential direction of the tapered rollers 24a and 24b and the spacer 11a, thermal expansion, and the like.

  Here, the circumferential length of the inner diameter side roller stopper 16 that intersects the plane including the roller pitch circle diameter is L2, and the tapered rollers 24a and 24b and the spacer 11a are successively connected in the circumferential direction and arranged without gaps alternately. In this case, assuming that the circumferential length of the last clearance 27 in the roller pitch circle diameter of the tapered roller 24a disposed first and the tapered roller 24b disposed last is L1, a relationship of L1 <L2 is established. That is, the inner diameter side roller that intersects the plane including the roller pitch circle diameter rather than the circumferential length of the last gap 27 in the roller pitch circle diameter of the tapered roller 24a arranged first and the tapered roller 24b arranged last. The length of the stopper 16 in the circumferential direction is increased.

  By configuring in this way, it is possible to prevent the spacer 11a from falling off to the outer diameter side. This will be described with reference to FIG. FIG. 4 is a diagram showing a state in which the spacer 11a is about to move to the outer diameter side in the cross section shown in FIG. Referring to FIG. 4, even if the spacer 11a tries to move in the outer diameter side, that is, in the direction of the arrow A in FIG. 4, the inner diameter side roller stopper 16 and the last clearance 27 have the above-described relationship. The inner diameter side roller stopper 16 provided in the spacer 11a is caught by the adjacent tapered rollers 24a and 24b. Therefore, it is possible to prevent the spacer 11a from falling off to the outer diameter side.

  Further, assuming that the length in the circumferential direction of the outer diameter side roller stopper 17 intersecting the plane including the roller pitch circle diameter is L3, there is a relationship of L2 <L3. That is, the circumferential length of the outer diameter side roller stopper 17 intersecting the plane including the roller pitch circle diameter is larger than the circumferential length of the inner diameter roller stopper 16 intersecting the plane including the roller pitch circle diameter. Make the direction longer.

  With this configuration, even when the tapered roller 24a tries to move to the outer diameter side in a state where the inner diameter side roller stopper 16 of the spacer 11a is caught by the adjacent tapered rollers 24a and 24b, the tapered roller 24a However, it will be caught by the outer diameter side roller stopper 17 provided in the adjacent spacers 11a and 11b. Therefore, it is possible to prevent the tapered roller 24a from falling off to the outer diameter side.

  Next, a method for assembling the tapered roller bearing 21 according to an embodiment of the present invention will be described. FIG. 5 is a view showing a state when the plurality of spacers 11 and the tapered rollers 24 are assembled into the inner ring 23. 3 and 5, first, the large-diameter side end face of the inner ring 23 faces downward, the large-diameter side ring 25b is arranged on the large collar 28b side, and a plurality of spacers 11 are arranged at appropriate intervals. Place it. In this case, it arrange | positions so that the overhang | projection part 26b provided in the large diameter side ring | wheel 25b may be located and contacted to the outer diameter side of the large diameter side protrusion part 15b provided in the spacer 11. FIG.

  Next, the tapered rollers 24 are arranged between the spacers 11. In this case, since the spacer 11 can be easily moved in the circumferential direction, the tapered rollers 24 are arranged by increasing the interval between the adjacent spacers 11, and the tapered rollers 24 are sequentially incorporated. In this way, the spacers 11 and the tapered rollers 24 are arranged alternately on the inner ring 23.

  And the last tapered roller 24 is arrange | positioned. In this case, the adjacent spacers 11 are provided with the outer diameter side roller stoppers 17 and have the above-described relationship, so that they are assembled by being pushed in. Thereafter, the small-diameter side wheel 25a is disposed on the small collar 28a side of the inner ring 23. Specifically, the protruding portion 26a provided on the small-diameter side wheel 25a is positioned and abutted on the outer diameter side of the small-diameter side protruding portion 15a provided on the spacer 11. In this way, the tapered roller bearing 21 is assembled.

  By constituting in this way, it can assemble, maintaining the contact state of spacer 11 and inner ring 23. Therefore, even if there is a slight impact or inclination at the time of assembly, the arrangement of the spacer 11 does not collapse or the spacer 11 does not fall off the inner ring 23. Since the contact state between the spacer 11 and the inner ring 23 is maintained, the contact state between the tapered roller 24 and the inner ring 23 arranged between the spacers 11 is also maintained. There is no possibility that the arrangement of the inner ring 23 will collapse or fall off from the inner ring 23. As a result, assembly is facilitated.

  First, the small-diameter side wheel 25a is disposed on the side of the small collar 28a of the inner ring 23, and then the small-diameter side protruding portion 15a of each spacer 11 is disposed so as to contact the overhanging portion 26a. Rollers 24 may be arranged. In this case, since the diameter of the spacer 11 on the large diameter side of the spacer 11 is increased, the tapered roller 24 can be easily incorporated.

Further, the shape of the inner ring may be changed to engage the side wheel and the inner ring. FIG. 6 is a cross-sectional view showing the tapered roller bearing 31 in this case. Referring to FIG. 6, small diameter side stepped portion 37a and large diameter side stepped portion that can engage small diameter side wheel 36a and large diameter side wheel 36b with small collar 38a and large collar 38b of inner ring 33. 37b is provided. Also, the small diameter side wheel 36a
The large-diameter side wheel 36b is provided with an engagement hole so that the small-diameter side stepped portion 37a and the large-diameter side stepped portion 37b can be engaged with each other. By utilizing the small-diameter side step portion 37a, the large-diameter side step portion 37b, and the engagement hole, the small-diameter side wheel 36a, the large-diameter side wheel 36b, and the inner ring 33 are engaged, whereby the spacer 11 and the inner ring The contact state with 33 can be maintained more strongly.

  7 and 8 show an example of a main shaft support structure of a wind power generator to which a tapered roller bearing according to an embodiment of the present invention is applied as a main shaft support bearing 75. FIG. The casing 73 of the nacelle 72 that supports the main components of the main shaft support structure is installed on the support base 70 via a swivel bearing 71 at a high position so as to be horizontally rotatable. A main shaft 76 that fixes a blade 77 that receives wind power to one end is rotatably supported in a casing 73 of the nacelle 72 via a main shaft support bearing 75 incorporated in a bearing housing 74. Is connected to a speed increaser 78, and the output shaft of the speed increaser 78 is coupled to the rotor shaft of the generator 79. The nacelle 72 is turned at an arbitrary angle by the turning motor 80 via the speed reducer 81.

  The main shaft support bearing 75 incorporated in the bearing housing 74 is a tapered roller bearing according to an embodiment of the present invention, and includes a plurality of outer ring, inner ring, outer ring and inner ring arranged in a circumferential direction. The interval between the surfaces of the tapered rollers and the adjacent tapered rollers that are in contact with the adjacent tapered rollers in the roller pitch circle diameter gradually increases from the small-diameter side end surface to the large-diameter side end surface. A spacer type retainer including a plurality of spacers, the spacers being provided separately from each other. The spacer is provided with an inner diameter side roller stopper for preventing the tapered roller from dropping off toward the inner diameter side. Here, the circumferential length of the inner diameter side roller stopper that intersects the plane including the roller pitch circle diameter is the first when the tapered rollers and spacers are successively connected in the circumferential direction and arranged without gaps alternately. It is longer than the circumferential length of the gap in the roller pitch circle diameter of the tapered roller arranged last and the tapered roller arranged last.

  Since the main shaft support bearing 75 supports the main shaft 76 that fixes the blade 77 that receives large wind force at one end, a large load is applied. Here, if the cage for holding the tapered roller is a split type and configured as described above, it is possible to prevent the spacer from falling off when the tapered roller bearing is assembled. Then, the tapered roller bearing can be easily assembled, and the productivity of the main shaft support structure of the wind power generator can be improved.

  In the above embodiment, a protrusion is provided on the end face of the spacer, the protrusion and the overhang provided on the side wheel are brought into contact with each other, and the contact state between the spacer and the inner ring is maintained. However, the present invention is not limited to this, and the spacer may be protruded so as to extend beyond the end face of the tapered roller, and the abutting state may be maintained by positioning the side ring above the protruding portion. Good. Further, other methods, for example, constraining the upper surface portion of the spacer, may be a ring-shaped member, and a contact state is maintained by a member having elasticity such as a rubber band. Also good. Note that the side wheels may be removed after assembly or may be left as they are. Further, the side wheel may be configured to be provided only on either the small diameter side or the large diameter side.

  In the above embodiment, the spacers arranged between the adjacent tapered rollers do not have to have all the dimensions, and the spacers having various dimensions are arranged in the dimensional relationship described above. You may decide to do it. In addition, the spacer is preferably made of resin from the viewpoint of improving productivity and from the viewpoint of facilitating the above-described engagement.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

  Since the tapered roller bearing according to the present invention can prevent the spacer from falling off, the tapered roller bearing is effectively used for a tapered roller bearing that requires good assembly.

  In addition, since the spacer according to the present invention can be prevented from falling off, the spacer is effectively used for a spacer included in a tapered roller bearing that requires good assembly.

  Further, since the side wheel according to the present invention can prevent the spacer from falling off at the time of assembly, it is effectively used when a tapered roller bearing that requires good assembly is incorporated.

  Further, the method for assembling the tapered roller bearing according to the present invention can prevent the spacer from falling off, and is therefore effectively used when reliable and easy assembly is required.

  Moreover, since the main shaft support structure of the wind power generator according to the present invention has good productivity, it is effectively used for the main shaft support structure of a large-scale wind power generator.

It is sectional drawing at the time of cut | disconnecting the spacer arrange | positioned between the last tapered rollers by the plane containing a roller pitch circle diameter. It is a perspective view of the spacer contained in the tapered roller bearing which concerns on one Embodiment of this invention. It is sectional drawing which shows the tapered roller bearing which concerns on one Embodiment of this invention. FIG. 4 is a view showing a state where a spacer is moved to the outer diameter side in the cross section shown in FIG. It is a figure which shows the state which arrange | positions a tapered roller between spacers. It is sectional drawing which shows the tapered roller bearing which concerns on other embodiment of this invention. It is a figure which shows an example of the main shaft support structure of the wind power generator using the tapered roller bearing which concerns on this invention. FIG. 8 is a schematic side view of the main shaft support structure of the wind power generator shown in FIG. 7.

Explanation of symbols

  11, 11a, 11b spacer, 12a, 12b guide surface, 13a small diameter side end surface, 13b large diameter side end surface, 14a top surface, 14b bottom surface, 15a small diameter side protruding portion, 15b large diameter side protruding portion, 16 inner diameter side roller stopper , 17 Outer diameter side roller stopper, 21, 31 Conical roller bearing, 22 Outer ring, 23, 33 Inner ring, 24, 24a, 24b Conical roller, 25a, 36a Small diameter side wheel, 25b, 36b Large diameter side wheel, 26a , 26b Overhang, 27 Last clearance, 28a, 38a small flange, 28b, 38b large flange, 37a small diameter side step, 37b large diameter side step, 70 support base, 71 swivel bearing, 72 nacelle, 73 casing, 74 bearing housing, 75 spindle support bearing, 76 spindle, 77 blade, 78 speed increaser, 79 generator, 80 turning motor, 81 speed reducer.

Claims (7)

Outer ring,
Inner ring,
A plurality of tapered rollers arranged in a circumferential direction between the outer ring and the inner ring;
A plurality of tapered rollers arranged between adjacent tapered rollers and having a roller pitch circle diameter in which the interval between the surfaces in contact with the adjacent tapered rollers gradually increases from the small diameter side end surface to the large diameter side end surface of the tapered roller. A tapered roller bearing including a spacer, and a plurality of spacers provided separately from each other.
The spacer is provided with an inner diameter side roller stopper for preventing the tapered roller from falling off to the inner diameter side,
The circumferential length of the inner diameter side roller stopper that intersects the plane including the roller pitch circle diameter is the first when the tapered rollers and the spacers are successively arranged in the circumferential direction and arranged without gaps alternately. A tapered roller bearing that is longer than the circumferential length of the clearance in the roller pitch circle diameter of the tapered roller disposed last and the tapered roller disposed last. The spacer is provided with an outer diameter side roller stopper for preventing the tapered roller from falling off to the outer diameter side,
The circumferential length of the outer diameter side roller stopper that intersects the plane including the roller pitch circle diameter is longer than the circumferential length of the inner diameter roller stopper that intersects the plane including the roller pitch circle diameter, The tapered roller bearing according to claim 1. 3. The cone according to claim 1, further comprising a ring-shaped member that extends in an annular shape so as to abut against all circumferentially disposed spacers and maintains a contact state between the inner ring and the spacers. Roller bearing. When arranged between the adjacent tapered rollers, the distance between the surfaces of the tapered rollers that contact the adjacent tapered rollers in the circle pitch diameter gradually increases from the small-diameter side end surface of the tapered roller toward the large-diameter side end surface. And a spacer provided with an inner diameter side roller stopper for preventing the tapered roller from falling off to the inner diameter side,
The circumferential length of the inner diameter side roller stopper that intersects the plane including the roller pitch circle diameter is the first when the tapered rollers and the spacers are successively arranged in the circumferential direction and arranged without gaps alternately. A spacer which is longer than the circumferential length of the gap in the roller pitch circle diameter of the tapered roller arranged last and the tapered roller arranged last. A plurality of tapered rollers and a plurality of spacers disposed between the adjacent tapered rollers are alternately disposed on the inner ring;
A ring-shaped member that extends in an annular shape so as to come into contact with all the spacers arranged in the circumferential direction, and maintains the contact state between the raceway surface of the inner ring and the spacer. An outer ring, an inner ring, a plurality of tapered rollers disposed between the outer ring and the inner ring, and an interval between surfaces that are disposed between the adjacent tapered rollers and abut on the adjacent tapered rollers in a roller pitch circle diameter Includes a plurality of spacers that gradually increase from the small-diameter side end surface to the large-diameter side end surface of the tapered roller, and a spacer type cage in which the plurality of spacers are provided separately from each other, An assembly method of a tapered roller bearing for assembling a tapered roller bearing comprising a ring-shaped member extending annularly so as to abut against all circumferentially arranged spacers,
A cone that maintains a contact state between the inner ring and the spacer by the ring-shaped member when the plurality of tapered rollers and the plurality of spacers are alternately arranged in a circumferential direction on the inner ring. How to assemble roller bearings. A blade that receives wind,
One end of which is fixed to the blade and rotates with the blade;
A main shaft support structure for a wind power generator, which is incorporated in a fixed member and has a tapered roller bearing that rotatably supports the main shaft,
The tapered roller bearing is disposed between an outer ring, an inner ring, a plurality of tapered rollers arranged in a circumferential direction between the outer ring and the inner ring, and the adjacent tapered rollers, and has a roller pitch circle diameter. A plurality of spacers in which the interval between the surfaces contacting the adjacent tapered rollers gradually increases from the small-diameter side end surface of the tapered roller toward the large-diameter side end surface; It is provided with a spacer type retainer provided,
The spacer is provided with an inner diameter side roller stopper for preventing the tapered roller from falling off to the inner diameter side,
The circumferential length of the inner diameter side roller stopper that intersects the plane including the roller pitch circle diameter is the first when the tapered rollers and the spacers are successively arranged in the circumferential direction and arranged without gaps alternately. A main shaft support structure for a wind power generator, which is longer than the circumferential length of the gap in the roller pitch circle diameter of the tapered roller arranged last and the tapered roller arranged last.

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