JP4646785B2 - Wind power generator - Google Patents

Description

  The present invention relates to a wind power generator, and more particularly to a lubrication structure for a gearbox in a wind power generator.

  Generally, in a wind power generator, a blade portion receives wind power and rotates, and the rotational power from the blade portion is transmitted to a speed increaser via an input shaft, and power is generated by the rotational power increased by the speed increaser. The machine is configured to rotate into electrical energy. Here, many gearboxes using a planetary gear mechanism are used.

  By the way, in this type of wind power generator, as a lubricating structure such as a gear meshing portion and a sun gear positioning plate in a planetary gear mechanism as a speed increaser, conventionally, a carrier and a sun gear are passed through a lubricating oil hole provided in a case of the speed increaser. Lubricating oil is forcibly supplied to the gap between rotating parts such as a so-called seal lubrication system in which a seal member is arranged between the rotating part and the case, and an appropriate amount is enclosed in the case of the gearbox. A so-called oil bath lubrication system is known in which each part is lubricated with lubricating oil.

  As a prior art related to the present invention, there is a technique proposed in Patent Document 1. The lubrication structure disclosed in Patent Document 1 relates to a lubrication structure of a planetary gear device such as an automatic transmission. An oil passage provided in an input shaft and an automatic transmission for supplying lubricating oil to a planetary gear are disclosed. An oil passage provided in the component, a gap between the lip seal and the carrier provided in the cancel plate, and an oil passage in the pinion shaft are configured.

JP 2004-19842 A

  However, in the case of the seal lubrication type used in the conventional speed increaser, oil leakage may occur due to secular change or wear, and there is a risk of causing a shortage of lubricating oil. Moreover, in this method, it is necessary to periodically perform maintenance of the seal member. However, since this type of wind generator speed increaser is mounted at a high place, disassembly work for the maintenance is performed. There is a problem that it is extremely difficult.

  On the other hand, in the case of the oil bath lubrication system, oil shortage and seizure may occur due to insufficient oil amount in the oil bath upper part of the oil bath, particularly in the high-speed rotating part.

  Further, in the technique disclosed in Patent Document 1, since the lubricating oil is supplied to the required part through the oil passage in the input shaft that is the rotating shaft, the lubricating oil is especially directed toward the tip of the rotating shaft. However, there is a problem that oil shortage due to insufficient oil amount is likely to occur.

  The present invention has been made in order to solve the above-described problems, and it is possible to reliably supply lubricating oil to a required portion of the speed increaser with a simple structure, and also a lubricating structure that does not require maintenance. It aims at providing the wind power generator which has.

In order to achieve the above object, a wind power generator according to the present invention comprises:
A speed increaser that increases the rotational power from the blades receiving wind force and transmits it to the generator;
A case for accommodating the speed increaser;
A fixed pipe that is fixed to the case so as to be located at the center of the speed increaser, and includes at least one of a power line, an electric signal line, a hydraulic pipe, and a pneumatic pipe to the blade part;
And a lubricating oil pipe which is attached to the outer peripheral surface of the fixed pipe and has a jet outlet for jetting the lubricating oil toward a required portion of the speed increaser (first invention).

  In the present invention, it is preferable that a rotating component is disposed with a gap in the outer peripheral portion of the fixed pipe, and the lubricating oil ejected from the jet port is sprayed on the inner peripheral surface of the rotating component (second invention).

  In the second aspect of the present invention, a concave portion is formed on the inner peripheral surface of the rotating component to which the lubricating oil is sprayed, and the lubricating oil stored in the concave portion is arranged on the outer peripheral side of the rotating component on the bottom surface of the concave portion. It is preferable that a lubricating hole to be supplied to a part to be provided is formed (third invention).

  In the first to third aspects of the present invention, a two-stage planetary gear mechanism including a first planetary gear mechanism on the low speed side and a second planetary gear mechanism on the high speed side is provided, and the fixed pipe includes the first planetary gear mechanism. It is preferable to provide a plurality of planetary gear mechanisms corresponding to one planetary gear mechanism and the second planetary gear mechanism (fourth invention).

  According to the present invention, since the lubricating oil pipe is attached to the outer peripheral surface of the fixed pipe located at the center of the speed increaser, the jet port provided in the lubricating oil pipe is connected to the required part of the speed increaser. Lubricating oil can be reliably supplied. Accordingly, there is no shortage of oil in the rotating parts of the speed increaser, and the rotating parts can be operated smoothly. Moreover, there is no need to perform maintenance on the seal member, and the structure is extremely simple.

  If the configuration of the third invention is adopted, the lubricating oil accumulated in the recess formed on the inner peripheral surface of the rotating part can be blown off by the centrifugal force generated by the rotation of the rotating part and supplied to other parts, and the lubricating oil It can be supplied to the parts arranged on the outer peripheral side through the hole, and the entire gearbox can be reliably lubricated. Further, according to the fourth aspect of the present invention, since the lubricating oil can be individually supplied to the planetary gear mechanism of each stage, it is possible to more reliably avoid the oil shortage.

  Next, specific embodiments of the wind power generator according to the present invention will be described with reference to the drawings.

  FIG. 1 shows a front view of a speed increaser in a wind power generator according to an embodiment of the present invention, FIG. 2 shows a longitudinal sectional view of the speed increaser of this embodiment, and FIG. 2 is a sectional view taken along line AA in FIG. 2, and FIG. 4 is a sectional view taken along line BB in FIG. 2 (a) and a sectional view taken along line CC in FIG.

  The wind power generator according to the present embodiment includes a blade portion (not shown, arranged on the left in FIG. 1) that receives wind power, a speed increasing device 1 that increases the rotational power from the blade portion, A generator (not shown, arranged on the right side in FIG. 1) that converts the rotational power increased by the speed increaser 1 into electrical energy is provided. Here, the speed increaser 1 includes a first-stage speed increasing device (low speed planetary portion) 2 composed of a planetary gear mechanism, a second stage speed increasing device (medium speed planetary portion) 3 composed of a planetary gear device, and a gear mechanism. The third speed increasing device (high-speed train section) 4 is composed of these, and each speed increasing device 2, 3, 4 is accommodated in a case 5.

  A fixed pipe 6 having both ends fixed to the case 5 is arranged in the front-rear direction (left-right direction in FIGS. 1 and 2) at the center of the speed increaser 1. A power line and an electric signal line to the electric motor provided in the blade portion are inserted into the fixed pipe 6. The electric motor is for changing the pitch angle of the blade in the blade portion according to the wind speed. A main shaft 7 is rotatably supported on the case 5 outside the fixed pipe 6, and the main shaft 7 is connected to a main shaft (wind turbine shaft) of a blade portion (not shown) so as to be driven to rotate. ing. Here, the main shaft 7 is disposed so as to be inclined by about 5 ° with respect to the horizontal plane so that the blade portion side faces upward.

  As shown in FIG. 2, the first-stage speed increasing device 2 includes a carrier 8 that is externally fitted to the shaft end of the main shaft 7, and the carrier 8 that is rotatable at equal intervals in the circumferential direction via bearings 9. A plurality of supported planetary gears 10, a ring gear 11 fixed to the case 5 and meshing with the planetary gear 10, and a sun gear 12 arranged on the outer periphery of the fixed pipe 6 and meshing with the planetary gear 10. The planetary gear 10 is arranged between the outer periphery of the sun gear 12 and the inner periphery of the ring gear 11, and is configured to engage with both the sun gear 12 and the ring gear 11 to perform planetary motion.

  The carrier 8 is formed by connecting a pair of disk-like base portions 13 and 14 with connecting portions 15 (see FIG. 3) arranged at a predetermined pitch along the circumferential direction, and between adjacent connecting portions 15. A planetary gear 10 is rotatably supported by a shaft member 16 disposed on the shaft via a bearing 9.

  The sun gear 12 includes a main body portion 12a formed with a tooth portion that meshes with the planetary gear 10, and an extending portion 12b extending from the main body portion 12a to the other side in the axial direction (right side in FIG. 2). A spline portion (involute spline) 12c is provided on the outer peripheral surface of the extended portion 12b.

  On the other hand, the second-stage speed increasing device 3 is supported by the case 5 via a bearing 17 so as to be rotatable, and is supported by the carrier 18 via a bearing 19 at equal intervals in the circumferential direction. A plurality of planetary gears 20, a ring gear 21 fixed to the case 5 and meshing with the planetary gear 20, and a sun gear 22 arranged on the outer periphery of the fixed pipe 6 and meshing with the planetary gear 20, The planetary gear 20 is disposed between the outer periphery of the sun gear 22 and the inner periphery of the ring gear 21, and is configured to mesh with both the sun gear 22 and the ring gear 21 for planetary motion.

  The carrier 18 is formed by connecting a pair of disk-like base portions 23 and 24 at a connecting portion 25 (see FIG. 4A) disposed at a predetermined pitch along the circumferential direction, and adjacent to each other. A planetary gear 20 is rotatably supported by a shaft member 26 disposed between the portions 25 via a bearing 19. Further, one base portion 23 of the carrier 18 is provided with an extension portion 27 extending from the base portion 23 to one side in the axial direction (left side in FIG. 2), and on the inner peripheral surface of the extension portion 27. A spline portion (involute spline) 27a is provided. The spline portion 27a is engaged with a spline portion 12c formed on the sun gear 12 of the first stage speed increasing device 2, whereby the sun gear 12 of the first stage speed increasing device 2 is connected to the second stage speed increasing device 3. Power is transmitted to the carrier 18.

  Further, as shown in FIG. 5 (enlarged view of portion D in FIG. 2), a step portion 12d is formed on the outer periphery of the end portion of the extending portion 12b in the sun gear 12 of the first step speed increasing device 2. A protrusion 27b is formed on the inner peripheral surface of the extended portion 27 of the carrier 18 of the second speed increasing device 3. Thus, the carrier 18 is positioned in the axial direction by sandwiching the protruding portion 27b between the stepped portion 12d and the positioning plate (sun gear positioning plate) 28 attached to the end surface of the extending portion 12b. ing.

  The sun gear 22 of the second stage speed increasing device 3 extends from the main body 22a to the other side in the axial direction (the right side in FIG. 2). The main body 22a is formed with teeth that mesh with the planetary gear 20. The extending portion 22b is provided, and a spline portion (involute spline) 22c is provided on the outer peripheral surface of the extending portion 22b.

  Next, the third stage speed increasing device 4 has a first spline portion (involute spline) 29c engaged with the spline portion 22c formed on the sun gear 22 of the second stage speed increasing device 3 on the inner peripheral surface. A gear 29, a second gear 30 that meshes with the first gear 29, and an output shaft 31 that rotates by the rotation of the second gear 30 are provided.

  As shown in FIG. 6 (enlarged view of portion E in FIG. 2), the first gear 29 includes a main body portion 29a in which a tooth portion meshing with the second gear 30 is formed, and the other axial direction from the main body portion 29a. An extending portion 29b extending to the side (right side in FIG. 2) is provided. A positioning plate (sun gear positioning plate) 32 having an L-shaped cross section is in contact with the end surface of the extending portion 29b and the end surface of the extending portion 22b of the sun gear 22 of the second-stage speed increasing device 3. A part of the positioning plate 32 is sandwiched by the positioning plate 33 that is in contact with the end face of the extending portion 29b, whereby the sun gear 22 is positioned in the axial direction. The first gear 29 is supported by the case 5 at one end side via a bearing 34 and the other end side via a bearing 35, and the output shaft 31 is supported by the case 5 via bearings 36 and 37. ing.

  In the speed up gear 1 configured as described above, when the main shaft 7 rotates due to wind hitting a blade portion (not shown), the carrier 8 fitted on the shaft end of the main shaft 7 rotates, The planetary gear 10 rotates while revolving around the sun gear 12 while meshing with the ring gear 11. As a result, the sun gear 12 is accelerated and rotated, and the first stage speed increasing device (low speed planetary section) 2 increases the speed. Next, the rotation of the sun gear 12 is transmitted to the carrier 18 of the second stage speed increasing device (medium speed planetary portion) 3 by the engagement of the spline portions 12c and 27a, and the planet gear 20 is rotated by the rotation of the carrier 18. It rotates while revolving around the sun gear 22 while meshing with the gear 21. As a result, the sun gear 22 is accelerated and rotated, and the second stage speed increasing device 3 increases the speed. Further, the rotation of the sun gear 22 is transmitted to the first gear 29 of the third speed increasing device 4 by the engagement of the spline portions 22c and 29c, and the number of teeth of the first gear 29 and the second gear 30 meshing with the first gear 29 is increased. The speed is increased in the third stage depending on the ratio, and the output shaft 31 is rotated at the high-speed rotation increased in speed over the above-described three stages. The output shaft 31 is connected to a generator (not shown), so that the generator is driven to generate power.

  By the way, the speed increaser 1 is provided with lubricating oil supply means for supplying lubricating oil to a gear meshing portion, a sun gear positioning plate, and the like in each stage of the gear mechanism. Hereinafter, the detailed structure of this lubricating oil supply means will be described.

  In this embodiment, the outer periphery of the case 5 is liquid-tightly closed so that lubricating oil can be stored in the internal space. The oil level indicated by the symbol OL in FIG. 2 is inclined with respect to the axis of the case 5 because the speed increaser 1 is inclined as described above. In the first-stage speed increasing device 2, the oil level OL is set so as to be located in a space surrounded by the base portions 13 and 14 of the carrier 8 and the connecting portion 15, and the shaft member 16 has one end. An oil passage (lubricating hole) 38 is provided that includes an axial hole 38 a that is open on the side, and a radial hole 38 b that communicates the axial hole 38 a with the inner and outer peripheral surfaces of the shaft member 16. As a result, the lubricating oil stored in the case 5 is guided into the oil passage 38, and the central portion of the shaft member 16 and the bearing 9 of the planetary gear 10 fitted on the shaft member 16 are lubricated.

  In the third stage speed increasing device 4, since a part of the first gear 29 is located below the oil level OL, the stored lubricating oil is supplied to the third speed increasing device 4. It can supply to each structural member of the gear mechanism to comprise effectively.

  In this embodiment, in addition to the lubrication by the oil bath as described above, a lubricating oil pipe for forced lubrication is arranged. That is, as also shown in FIG. 7, a first lubricating oil pipe 39 is provided on the upper surface of the fixed pipe 6 disposed in the center of the speed increaser 1, and the lower surface of the fixed pipe 6 is provided on the lower surface. Is provided with a second lubricating oil pipe 40. These lubricating oil pipes 39 and 40 are supplied with lubricating oil sent from a hydraulic pump (not shown) that circulates and drives the stored lubricating oil. These lubricating oil pipes 39 and 40 are attached so as to be along flat surfaces 6 a and 6 b formed by partially cutting off the upper surface or the lower surface of the fixed pipe 6, and the tip portions are closed by the cap portion 41. At the same time, the cap portion 41 is welded and fixed to the flat surfaces 6a and 6b. Note that the longer first lubricating oil pipe 39 is held by a clip member 42 whose intermediate portion is fixed to the fixed pipe 6.

  The front end portion of the first lubricating oil pipe 39 extends to the end portion of the extending portion 12b of the sun gear 12 in the first stage speed increasing device 2, and the sun gear 12 and the carrier 18 are provided at the front end portion. There are provided two jet outlets 39a and 39b for jetting the lubricating oil toward the locking portion (see FIG. 7D).

  More specifically, as shown in FIG. 5, an oil reservoir (concave portion) 43a is formed between the positioning plate 28 and the inner peripheral surface of the distal end portion of the extending portion 12b of the sun gear 12, and this oil Lubricating oil is ejected from the ejection port 39a toward the reservoir 43a. The oil reservoir 43a is provided with an oil passage (lubricant hole) 44 that guides the lubricating oil stored in the oil reservoir 43a to the outer peripheral surface of the sun gear 12, and is branched from the oil passage 44 to provide the lubricating oil. An oil passage (lubricating hole) 45 is provided to guide the protrusion to the contact surface between the protrusion 27b and the step 12d. The oil reservoir 43a has an oil passage (lubricant) that guides the lubricating oil stored in the oil reservoir 43a to a contact surface between the inner peripheral surface of the protrusion 27b and the outer peripheral surface of the distal end portion of the extending portion 12b. Hole) 46 is provided. Further, at the outer peripheral end of the oil passage 44, the end edges of the spline portions 22 c and 27 a and the projecting portion 27 b of the extension portion 27 of the carrier 18, and the extension portion 27 are connected so as to communicate with the oil passage 44. A fresh oil reservoir (concave portion) 43b is formed surrounded by the peripheral surface and the outer peripheral surface of the extending portion 12b.

  An oil reservoir (concave portion) 47 is formed on the inner peripheral surface of the base portion 23 of the carrier 18 adjacent to the protrusion 27 b, and lubricating oil is ejected from the ejection port 39 b toward the oil reservoir 47. Is done. The oil reservoir 47 is provided with an oil passage 48 that guides the lubricating oil stored in the oil reservoir 47 to the outer peripheral side of the carrier 18. The oil passage 48 communicates with an oil passage 49 formed in the shaft member 26 of the carrier 18, and supplies lubricating oil to the bearing 19 of the planetary gear 20 through the oil passage 49.

  On the other hand, as shown in FIG. 6, the distal end portion of the second lubricating oil pipe 40 extends to the central portion of the first gear 29 in the third-stage speed increasing device 4, and the distal end portion thereof. In the middle part, jet outlets 40a and 40b for jetting lubricating oil are provided. Here, the spout 40a is provided at a position facing an oil reservoir (recessed portion) 50a formed on the outer peripheral surface of the extending portion 22b of the sun gear 22, and jets lubricating oil toward the oil reservoir 50a. . Further, the jet outlet 40 b is provided at a position facing an oil reservoir (concave portion) 51 formed in the vicinity of the tip of the extending portion 22 b of the sun gear 22, and jets lubricating oil toward the oil reservoir 51. .

  In the oil reservoir 50a, the lubricating oil stored in the oil reservoir 50a is formed on the outer peripheral surface of the sun gear 22 and in the vicinity of each edge of the spline portion 22c and the spline portion 29c of the first gear 29. An oil passage 52 leading to the oil reservoir 50b is provided. The oil reservoir 51 is provided with an oil passage 53 that guides the lubricating oil stored in the oil reservoir 51 to the gap between the extended portion 22b of the sun gear 22 and the extended portion 29b of the first gear 29. It has been. The oil passage 53 is branched from the lubricating oil in the oil passage 53 and led to the contact surface between the end surface of the extending portion 22 b and the positioning plate 32, and the oil passage 54 is further lubricated. An oil passage 55 that guides oil to the contact surface between the positioning plate 32 and the positioning plate 33 is provided continuously.

  Since it is configured in this manner, the lubricating oil supplied to the vicinity of the connecting portion between the first stage speed increasing device 2 and the second stage speed increasing device 3 by the first lubricating oil pipe 39 is supplied from the jet port 39a. After being ejected toward the reservoir 43a and temporarily stored in the oil reservoir 43a and the oil reservoir 43b, the spline engaging portions (spline portions 12c and 27a) are lubricated. Further, the lubricating oil in the oil reservoir 43a is guided to the outer peripheral surface side of the sun gear 12 through the oil passage 44, and passes through the oil passage 45 branched from the oil passage 44, so that the protrusion 27b and the step portion 12d The contact surface is guided to lubricate the contact surface. Further, the lubricating oil in the oil reservoir 43a passes through the oil passage 46, and the contact surface between the inner peripheral surface of the protruding portion 27b and the outer peripheral surface of the distal end portion of the extending portion 12b, and the protruding portion 27b and the extending portion 12b. Guided to the contact surface between each end surface and the positioning plate 28, the contact surface is lubricated.

  On the other hand, the lubricating oil ejected from the outlet 39b of the first lubricating oil pipe 39 toward the oil reservoir 47 is temporarily stored in the oil reservoir 47, and then passes through the oil passage 49 from the oil passage 48. It is supplied to the bearing 19 of the planetary gear 20 to lubricate the bearing. In this way, the sun gear 12, the carrier 18, the positioning plate 28, and the like, which are rotating parts in the connecting portion between the first stage speed increasing device 2 and the second stage speed increasing device 3, are effectively lubricated.

  Further, the lubricating oil supplied to the vicinity of the connecting portion between the second stage speed increasing device 3 and the third stage speed increasing device 4 by the second lubricating oil pipe 40 is ejected from the ejection port 40a toward the oil reservoir 50a. After being temporarily stored in the oil reservoir 50a and the oil reservoir 50b, the spline engaging portions (spline portions 22c and 29c) are lubricated.

  On the other hand, the lubricating oil ejected from the outlet 40 b of the second lubricating oil pipe 40 toward the oil reservoir 51 is temporarily stored in the oil reservoir 51 and then extends through the oil passage 53. Guided to the gap between the extended portion 29b of the first gear 29 and the portion 22b, is branched from the oil passage 53 and supplied to the oil passage 54, and the end surface of the extended portion 22b contacts the positioning plate 32. Lubricate the surface. Thereafter, the lubricating oil is guided to the contact surface between the positioning plate 32 and the positioning plate 33 through the oil passage 55, and this portion lubricates the bearing. In this way, the sun gear 22, the first gear 29, the positioning plates 32, 33, and the like, which are rotating parts in the connecting portion between the second stage speed increasing device 3 and the third stage speed increasing device 4, are effectively lubricated. .

  In the present embodiment, as described above, the first lubricating oil pipe 39 and the second lubricating oil pipe 40 are provided on the upper and lower surfaces of the fixed pipe 6, respectively, and the forced lubrication of the lubrication required portion is performed. However, in addition to these lubricating oil pipes, as shown in FIG. 2, a lubricating oil supply oil path 56 connected to the case 5 with an outer pipe (not shown) and the oil path therefor An oil passage 57 and the like branching from 56 are provided, and nozzles 58 and 59 and the like are provided at the front ends of these oil passages, and the engaging portion between the planetary gear 10 and the ring gear 11, the planetary gear 20 and the ring gear 21, The engaging portions are appropriately lubricated.

  As described above, according to the lubrication structure in the gearbox 1 of the present embodiment, the lubricating oil pipes 39 and 40 are attached to the outer peripheral surface of the fixed pipe 6 located at the center of the gearbox 1. Lubricating oil can be reliably supplied to the rotating parts of the gearbox 1 from the jet ports 39a, 39b; 40a, 40b provided in the lubricating oil pipes 39, 40. Further, lubricating oil ejected from these ejection ports 39a, 39b; 40a, 40b is provided with oil reservoirs (concave portions) 43a, 43b, 47; 50a, 50b, provided on the inner peripheral surfaces of the sun gears 12, 22 and the carrier 18. 51 is temporarily stored, and the stored lubricating oil is blown off by centrifugal force generated by the rotation of rotating parts such as the sun gears 12, 22, and the carrier 18, and supplied to other parts. Therefore, there is no shortage of oil in the rotating parts of the gearbox 1 and the rotating parts can be operated smoothly. In addition, there is an advantage that the maintenance of the seal member is unnecessary and the structure is extremely simple.

  In particular, in the present embodiment, the lubricating oil is supplied through a fixed pipe, not the method of supplying the lubricating oil through the rotating shaft, in order to lubricate the high-speed rotating part. There is an effect that can be supplied. In this embodiment, the example in which the power line and the electric signal line for the electric motor are inserted into the fixed pipe 6 has been described. However, when a hydraulic motor or a pneumatic motor is used instead of the electric motor, A hydraulic pipe or a pneumatic pipe is inserted into the fixed pipe 6.

The front view of the gearbox in the wind power generator concerning one embodiment of the present invention. Vertical section of the gearbox of this embodiment AA line sectional view of FIG. BB line sectional view (a) and CC line sectional view (b) of FIG. D section enlarged view of FIG. E section enlarged view of FIG. Diagram showing the structure of lubricating oil piping

Explanation of symbols

1 Speed increaser 2 1st stage speed increasing device (low speed planetary part)
3 Second stage gearbox (medium speed planetary part)
4 Third stage gearbox (high-speed train)
5 Case 6 Fixed piping 7 Spindle 12c, 27a, 22c, 29c Spline portion 28, 32, 33 Positioning plate 39 First lubricating oil piping 39a, 39b Outlet 40 Second lubricating oil piping 40a, 40b Outlet 43a, 43b , 47, 50a, 50b, 51 Oil reservoir (concave)

Claims (4)

A speed increaser that increases the rotational power from the blades receiving wind force and transmits it to the generator;
A case for accommodating the speed increaser;
A fixed pipe that is fixed to the case so as to be located at the center of the speed increaser, and includes at least one of a power line, an electric signal line, a hydraulic pipe, and a pneumatic pipe to the blade part;
A wind turbine generator, comprising: a lubricating oil pipe attached to an outer peripheral surface of the fixed pipe and having a jet outlet for jetting the lubricating oil toward a required portion of the speed increaser.   The wind turbine generator according to claim 1, wherein a rotating component is arranged with a gap in an outer peripheral portion of the fixed pipe, and lubricating oil ejected from the jet port is sprayed to an inner peripheral surface of the rotating component.   A concave portion is formed on the inner peripheral surface of the rotating component to which the lubricating oil is sprayed, and the lubricating oil accumulated in the concave portion is supplied to the component disposed on the outer peripheral side of the rotating component on the bottom surface of the concave portion. The wind power generator according to claim 2, wherein the hole is formed.   A two-stage planetary gear mechanism comprising a first planetary gear mechanism on the low speed side and a second planetary gear mechanism on the high speed side is provided, and the fixed pipe includes the first planetary gear mechanism and the second planetary gear mechanism. The wind power generator in any one of Claims 1-3 provided with two or more corresponding to a gear mechanism.

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