JP2003269553A - Speed increase device for wind power generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve assembling efficiency of a planetary gear device in a speed increase device for a wind power generator provided with a planetary gear mechanism. <P>SOLUTION: This speed increase device has a planetary gear mechanism and a gear mechanism arranged in series between an input shaft and an output shaft. A medium input shaft of the gear mechanism is supported by a housing relatively rotatably around an axis and not movably in a radial direction. A sun gear acting as an output part in the planetary gear mechanism is spline- connected to the medium input shaft movably in the radial direction. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speed increasing device used in a wind power generator for converting rotational energy from a wind turbine into electric energy by a generator.

[0002]

2. Description of the Related Art Various wind power generators have been proposed in the past, which are configured to increase the rotational energy obtained from a wind turbine using a planetary gear mechanism and input the same to a generator to obtain electric energy. For example, German DE19857914A1 describes a planetary gear mechanism configured to input rotational power from a wind turbine to a carrier and take out a speed-up intermediate output from a sun gear, and an intermediate input that receives rotational power from the sun gear. There is disclosed a speed increasing device for a wind turbine generator including a shaft and a gear mechanism having a gear train operatively connected to the intermediate input shaft.

The conventional speed increasing device disclosed in the German publication can improve the speed increasing ratio while preventing the expansion of the device by utilizing a planetary gear mechanism, but on the other hand, it has the following disadvantages. is doing. That is, the speed increasing device for a wind turbine generator is formed in a relatively large size in consideration of power generation efficiency, and a large planetary gear mechanism is also used for this (generally, the planetary gear mechanism is used. The diameter of the internal gear is 1m to 1.4m
And)). In such a large planetary gear mechanism,
It is difficult to engage the sun gear, planetary gear, and internal gear as designed. By the way, in the conventional speed increasing device, the sun gear is integrally provided on the intermediate input shaft whose both ends are supported by the housing (that is, the sun gear has an axial position fixed with respect to the housing). Has been). Further, the planetary gears and the internal gears are also fixed in axial position with respect to the housing. That is, in the conventional speed increasing device, the meshability of the three planetary elements cannot be adjusted at the assembly stage. Therefore, in the conventional speed-up device, it is necessary to manufacture the gear precision of the three planetary elements with extremely high precision in order to ensure meshing of the planetary gear mechanism. In order to improve the meshing accuracy of the gear, for example, after hardening the gear to increase its hardness, it is necessary to grind the deformation and distortion of the gear due to hardening to finish the tooth profile of the gear accurately. As described above, the planetary gear mechanism used in the speed increasing device for the wind power generator is large, and therefore, it requires a dedicated processing facility, takes time to perform the work, and as a result, the manufacturing cost rises. Will end up. As described above, in the conventional speed increasing device, the meshing property of the three planetary elements in the planetary gear mechanism cannot be adjusted in the assembling stage, resulting in deterioration of operating efficiency of the planetary gear mechanism and manufacturing cost. There is a problem that it will lead to soaring.

Further, the wind power generator is continuously used for a long period (for example, 20 to 30 years) after being installed at the installation site. Therefore, it is necessary to improve the durability of each constituent member as much as possible. On the other hand, there is a permanent problem to reduce the size of the entire device without impairing the speed increasing ratio. However, in the conventional speed increasing device, such a viewpoint is not taken into consideration.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above prior art, and in a speed increasing device for a wind turbine generator equipped with a planetary gear mechanism, the planetary gear device is suppressed while suppressing a rise in manufacturing cost. It is an object of the present invention to provide a speed increasing device capable of improving the meshing property of the. Further, the present invention relates to a speed increasing device for a wind turbine generator equipped with a planetary gear mechanism, the planetary gear supporting pin, the supporting pin and the planetary gear device without lowering the speed increasing ratio and increasing the size of the entire device. Another object is to provide a speed increasing device capable of improving the durability of a bearing inserted between

[0006]

In order to achieve the above-mentioned object, the present invention is a speed increasing device for a wind turbine generator, which increases the rotational energy obtained from a wind turbine, wherein the rotational energy from the wind turbine is An input shaft that operatively receives, a sun gear, a planetary gear meshed with the sun gear so as to be able to revolve around the sun gear, and a planetary gear that is rotatably supported by a pinion shaft, A planetary gear mechanism having a carrier that supports the pinion shaft and that rotates with the revolution of the planetary gear, and an internal gear that meshes with the planetary gear, wherein the carrier is operatively connected to the input shaft. A planetary gear mechanism, an intermediate input shaft that is arranged coaxially with the sun gear and that is connected to the sun gear so as not to rotate relative to the axis, and a gear train that is operatively connected to the intermediate input shaft. With gear mechanism, An output shaft operatively connected to the gear mechanism; and a housing for accommodating the planetary gear mechanism and the gear device, wherein the housing is one side and the other side in the housing axial direction that coincides with the axial direction of the planetary gear mechanism A housing body having a first opening and a second opening, respectively, and a central wall between the first opening and the second opening, wherein the first and second openings are respectively the planetary gear mechanism. And a gear mechanism is insertable, the intermediate input shaft is supported by the central wall so as to be relatively rotatable,
The sun gear provides a speed increasing device for a wind turbine generator that is splined to the intermediate input shaft. In a preferred mode, the sun gear is coupled to the intermediate input shaft so as to be immovable in a direction away from the intermediate input shaft. In such an aspect, the carrier is provided in the sun gear accommodation space located between the one end portion and the other end portion in the axial direction and the other end portion in the axial direction, and connects the sun gear accommodation space and the outside. An opening through which the sun gear can be inserted, and the other axial end portion is supported by the central wall so as to be relatively rotatable. Further, the central wall has an axial hole through which the sun gear is inserted and which supports the intermediate input shaft.

Further, in order to achieve the above-mentioned other object, the present invention is a speed increasing device for a wind turbine generator for increasing the rotational energy obtained from a wind turbine, wherein the rotational energy from the wind turbine is operatively operated. An input shaft for receiving, a sun gear, a planetary gear meshed with the sun gear so as to be able to revolve around the sun gear, the planetary gear being rotatably supported by a pinion shaft, and the pinion shaft. A planetary gear mechanism having a carrier that supports and rotates with the revolution of the planetary gear, and an internal gear that meshes with the planetary gear, wherein the carrier is operatively connected to the input shaft. Mechanism,
And a housing for accommodating the planetary gear mechanism, wherein the carrier forms a space for accommodating the planetary gear between a first carrier member operatively connected to the input shaft and the first carrier member. And a second carrier member that is separably connected to the one carrier member, wherein the pinion shaft has one end and the other end formed on the first and second carrier members, respectively. A wind power generator that is supported by a bearing hole and has a central portion rotatably supporting the planetary gears, and the pinion shaft has a larger diameter at the central portion than at the one end and the other end. A speed increasing device for a device is provided. In one aspect, the housing has an opening at one end in the axial direction through which the planetary gear mechanism can be inserted, and a dividing surface between the first carrier member and the second carrier member has an axis line of the housing. It is configured to be substantially orthogonal to the direction.

Preferably, the housing is constructed so that oil can be stored therein, and the pinion shaft has an axial hole that opens at at least one of the one end and the other end, and the outer periphery of the axial hole and the central part. An oil passage communicating with the surface.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION First Embodiment Hereinafter, a speed increasing device 1 for a wind turbine generator according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic diagram of a wind turbine generator 100 to which the speed increasing device 1 according to the present embodiment is applied. 2 is a longitudinal development view of the speed increasing device 1 according to the present embodiment, and FIG. 3 is a view taken along the line III-III in FIG.

As shown in FIG. 1, the speed increasing device 1 is used as one component of the wind turbine generator 100. That is, in the wind turbine generator 100, the wind turbine 110 that converts wind energy into rotational power, the speed increasing device 1 that increases the rotational power from the wind turbine 110, and the speed increasing device 1 increase the speed. A generator motor 120 that converts rotational power into electric energy, a nacelle that houses the speed increasing device 1 and the generator motor 120, and a tower 1 that holds the nacelle at a predetermined height.
40 and 40.

Preferably, the wind turbine generator 100 is provided with a brake mechanism 140 for selectively applying / releasing a braking force to / from the output shaft 40 of the speed increasing device 1.
As will be described in detail later, the brake mechanism 140 is provided to prevent the input of rotational power to the generator motor 120 except when the wind speed is within a predetermined range. Preferably, the wind turbine generator 100 is a pitch angle adjusting device 150 for adjusting the pitch angle of each blade in the wind turbine 110.
Is equipped with. Further, preferably, a turning mechanism (not shown) for directing the wind turbine 110 in a direction perpendicular to the wind direction is interposed between the nacelle and the tower 140. The pitch angle adjusting mechanism 150 and a turning mechanism (not shown) are provided to adjust the output rotational speed of the wind turbine 110 so as to fall within a range suitable for the generator motor according to the wind direction.

As shown in FIG. 2, the speed increasing device 1 includes an input shaft 10 that operatively receives rotational energy from the wind turbine 110, and a planetary gear mechanism 20 that is operatively connected to the input shaft 10. A gear mechanism 30 operatively connected to the planetary gear mechanism 20, an output shaft 40 operatively connected to the gear mechanism 30, the planetary gear mechanism 20 and the gear mechanism 30.
And a housing 50 that accommodates.

The planetary gear mechanism 20 includes a sun gear 21.
An internal gear 22 arranged around the sun gear 21 so as to be coaxial with the sun gear 21, and the sun gear 2
1 and the internal gear 22, both of which are arranged so as to mesh with the planetary gear 23, a pinion shaft 24 which rotatably supports the planetary gear 23, and the pinion shaft 24, And a carrier 25 that rotates around the axis of the sun gear 21 in association with the revolution of the planetary gear 23 around the sun gear 21.

The speed increasing device 1 according to the present embodiment is configured so that the rotational power from the wind turbine 110 is input to the carrier 25 via the input shaft 10.
Further, the internal gear 22 is provided integrally with the housing 50 and serves as a fixed gear, as will be described later in detail. Then, the speed increasing output of the planetary gear mechanism 1 is taken out from the sun gear 21. That is, in the present embodiment, the carrier 25, the internal gear 22, and the sun gear 21 that are the three elements of the planetary gear mechanism 20.
Respectively constitute an input section, a fixed section and an output section.

The gear mechanism 30 includes the planetary gear device 2.
The rotational power from 0 is transmitted to the output shaft 40 at an increased speed. In the present embodiment, the gear mechanism 30 is arranged coaxially with the sun gear 21, and is connected to the sun gear 21 such that the intermediate input shaft 31 is connected to the sun gear 21 such that the sun gear 21 cannot rotate relative to the sun gear 21, and the intermediate input shaft 31. A large-diameter first gear 32 supported by a fixing means such as shrink-fitting so as not to rotate relative to each other, a small-diameter second gear 33 that meshes with the first gear 32, and an outer peripheral surface of the first gear 32. An idle shaft 34 having two gears 33 engraved therein, a large-diameter third gear 35 supported by a fixing means such as shrink fit so as to be non-rotatable relative to the idle shaft 34, and the third gear A small-diameter fourth gear 36 formed on the outer peripheral surface of the output shaft 40 so as to mesh with the gear 35.
It has and.

In the present embodiment, the first gear 3
The number of teeth of each gear is set between the second gear 33 and the second gear 33 and between the third gear 35 and the fourth gear 36 so as to increase the speed. Further, preferably, the first to fourth gears 32, 33, 35, 36 can be helical gears, which can prevent noise and vibration.

The housing 50 has a first opening on one side (left side in FIG. 2) and the other side (right side in FIG. 2) of the housing axial direction X which coincides with the axial direction of the planetary gear mechanism 20. 51a and second opening 51
b, and the first opening 51a and the second opening 51b
A substantially cylindrical housing body 51 having a central wall 51c is provided between and in the axial direction.

In the present embodiment, the housing 50 further includes the first and second openings 51a and 51b.
The first and second lids 52 and 53 connected to the housing body 51 are provided so as to close the above.
Preferably, the first and second lids 52 and 53 are configured to liquid-tightly close the first and second openings 51a and 51b, respectively, whereby the housing 5
The lubricating oil can be stored in the inner space of 0.

The first and second openings 51a and 51b are
The shape and size are such that the planetary gear mechanism 20 and the gear mechanism 30 are inserted therethrough, respectively. That is, in the present embodiment, the planetary gear device 20 is installed in the housing 50 from the axial direction one side of the housing 50 through the first opening 51a, and the gear mechanism 30 includes the first gear 51. Housing 5 through two openings 51b
It can be installed in the housing 50 from the other side in the axial direction of 0.

As shown in FIG. 2, in the present embodiment, the housing body 51 includes the central wall 51c,
A box-shaped member 51 'having a peripheral wall 51d extending from the peripheral portion of the central wall 51c to the other side in the axial direction of the housing, and a ring-shaped member 51' removably connected to the surface of the central wall 51c on the one axial side. 'Is equipped with. The ring-shaped member 51 ″ has the internal gear 22 on the inner peripheral surface. That is, in the present embodiment, the internal gear 22 of the planetary gear mechanism 20 is fixedly provided on the ring-shaped member 51 ″ which is a component of the housing 50.

The first lid 52 is, as shown in FIG.
The center portion 52a corresponding to the first opening 51a and the support leg portion 52b extending radially outward from the center portion 52a are provided, and the nacelle 13 is provided via the support leg portion 52b.
It is configured so that it can be fixed to zero.

One end of the intermediate input shaft 31 is rotatably supported in a bearing hole formed in the central wall 51c, and the other end is formed by a bearing hole formed in the second lid 53. It is supported for relative rotation. Further, the idle shaft 34 and the output shaft 40 have a bearing recess formed at the center wall 51c at both ends thereof and the second shaft.
It is supported by a bearing hole formed in the lid 53 so as to be relatively rotatable.

Here, a power transmission structure from the planetary gear mechanism 20 to the gear mechanism 30 will be described. In the present embodiment, as described above, the intermediate input shaft 31
Has one end supported by the central wall 51c. A spline portion 31a is formed at one end of the intermediate input shaft 31. More specifically, of the one end of the intermediate input shaft 31, the spline portion 31 along the axial direction is formed on the outer peripheral surface of the one end of the intermediate input shaft 31 closer to the tip end than the portion bearing on the central wall 51c.
a is formed.

The sun gear 21 corresponds to the intermediate input shaft 31.
It has a spline portion 21c that engages with the spline portion 31a. In the present embodiment, the sun gear 21
Is a main body portion 21a formed with a tooth portion that meshes with the planetary gear 23, and the other side in the axial direction from the main body portion 21a (see FIG. 2).
In the right side), a hollow connecting portion 21b is provided, and the spline portion 21c is provided on the inner peripheral surface of the connecting portion 21b.

As described above, the intermediate input shaft 31 is supported by the housing 50 so as to be rotatable about its axis and immovable in the radial direction. On the other hand, the sun gear 21 is spline-coupled to the intermediate input shaft 31 while being free from other members. That is, the sun gear 21 is movable in the radial direction within the range in which the spline connection with the intermediate input shaft 31 is maintained.

As described in the section of the prior art, it is very difficult to assemble the three elements of the planetary gear mechanism as designed. That is, it is very difficult to assemble the planetary three elements with the radial positions of the three planetary elements fixed.
In particular, it becomes more difficult in a large planetary gear mechanism such as used in a wind turbine generator. On the other hand, in the present embodiment, as described above, the sun gear 21 is
Within the range where the spline connection with the intermediate input shaft 31 is maintained, it is possible to freely move in the radial direction.
Therefore, the manufacturing error and / or the assembly error of the planetary gear mechanism can be absorbed by the “radial movement” of the sun gear 21.

In the present embodiment, the intermediate input shaft 31 has the spline portion on the outer peripheral surface and the sun gear 21 has the spline portion on the inner peripheral surface. It is also possible to provide spline portions on the inner peripheral surface of the intermediate input shaft 31 and the outer peripheral surface of the sun gear 21, respectively.

Further, reference numeral 151 in FIG. 2 denotes a tubular member into which the operating shaft of the pitch angle adjusting device 150 is inserted, and in the present embodiment, the tubular member 151 is inserted into the sun gear 21. It has a central opening.

Next, the pinion shaft 24 and the carrier 25 in the planetary gear mechanism 20 will be described in detail. In the present embodiment, as shown in FIG.
The carrier 25 includes a first carrier member 26 operatively connected to the input shaft 10 and the first carrier member 26.
In cooperation with the planetary gear 23 and the sun gear 21.
The first carrier member 2 so that the accommodation space of the first carrier member 2 can be formed.
6 and a second carrier member 27 that is detachably connected.

The first carrier member 26 includes a first main body portion 26a connected to the input shaft 10 and the first main body portion 2a.
6a and a first flange portion 26b extending outward in the radial direction. The second carrier member 27 has a second body portion 27a having a hollow space for housing the sun gear 21.
And a second extending radially outward from the second main body portion 27a
And a flange portion 27b. The second body portion 27
Is configured such that the other end (a part separated from the first carrier member 26) is rotatably supported by the central wall 51c of the housing 50.

In the present embodiment, the second flange portion 27b is such that one area in the circumferential direction is the first flange portion 2b.
6b is a connection region that abuts one corresponding region, and the other region in the circumferential direction can form an accommodation space for the planetary gear 23 between the first flange portion 26b and the first flange portion 26b. It is a separated area separated from the other area corresponding to the part.

A first bearing hole 26c and a second bearing hole for supporting the pinion shaft are respectively provided in the other region of the first flange portion and the spaced region of the second flange portion corresponding to the other region. 27c is formed. That is, the pinion shaft 24 has one end 24a and the other end 24b supported by bearing holes 26c and 27c formed in the first and second carrier members 26 and 27, respectively, and
The central portion 24c is configured to support the planetary gear 23 in a relatively rotatable manner.

As shown in FIG. 2, the pinion shaft 24
Means that the central portion 24c has the one end portion 24a and the other end portion 2
The diameter is larger than 4b. More specifically, in the present embodiment, the carrier 25 can be separated from the first
It is constituted by the carrier member 26 and the second carrier member 27, and the central portion 24c has one end portion 24a and the other end portion 2
The pinion shaft 24 having a diameter larger than 4b can be easily supported by the carrier 25.

That is, in assembling the planetary gear mechanism 20 into the housing 50, first, the other end of the second carrier member 27 is supported by the central wall 51c.
Next, the sun gear 21 is spline-connected to the intermediate input shaft 31, and the other end 24b of the pinion shaft 24 having a large central portion 24c is inserted into the second bearing hole 27c of the second carrier member 27. insert. Then, the bearing 28 is externally inserted into the central portion 24c of the pinion shaft 24, and the planetary gear 23 is supported by the bearing 28. Finally, the first carrier member 26 is connected to the second carrier member 27 so that the one end 24a of the pinion shaft 24 is inserted into the first bearing hole 26c of the first carrier member 26.

As described above, the speed increasing device 1 according to the present embodiment has the central portion 24 rather than the one end portion 24a and the other end portion 24b.
The pinion shaft 24 having a large diameter c is provided so that the durability can be improved.

That is, during operation of the speed increasing device 1,
A large load is applied to the power transmission path. Therefore, the planetary gear 23 is rotatably supported, and the pinion shaft 24 that operatively connects the carrier 25 and the planetary gear 23, and the bearing that is interposed between the pinion shaft 24 and the planetary gear 23. A heavy load is also applied to 28. To counter such a large load, it may be possible to simply increase the size of the pinion shaft and the bearing, but this causes the planetary gear mechanism to increase in size.

On the other hand, in the present embodiment, by providing the above-mentioned configuration, the large load portion (the central portion 24c of the pinion shaft 24 and the bearing is maintained while maintaining the overall size of the planetary gear mechanism 20). Only 28) has a large diameter. Therefore, the durability of the planetary gear mechanism 20 can be improved without increasing the size of the planetary gear mechanism 20.

Preferably, the central portion 24c of the pinion shaft 24 can have a diameter larger than the inner diameters of the first and second bearing holes 26c and 27c, whereby the axial movement of the pinion shaft 24 can be achieved. Can be effectively prevented.

Also, preferably, the first carrier member 2
The dividing surface Y between the first carrier member 27 and the second carrier member 27 may be configured to be orthogonal to the axial direction X of the housing 50. As described above, the planetary gear device 20 is housed in the housing 50 from the first opening 51a of the housing 50 along the axial direction. Therefore, if the dividing surface Y of the first carrier member 26 and the second carrier member 27 is configured to be orthogonal to the axial direction X of the housing 50, the installation work of the planetary gear mechanism 20 in the housing 50 can be performed. While performing, at the same time, the connecting work of the first carrier member 26 and the second carrier member 27 can be performed, and thereby the assembling efficiency can be improved.

As mentioned above, the housing 50 is preferably constructed so that lubricating oil can be stored therein.
In such a case, the oil hole 51e is formed in the lower portion of the central wall 51c.
And the lubricating oil in the housing is the planetary gear mechanism 20.
And the gear mechanism 30.

In the case where the lubricating oil can be stored inside the housing 50, more preferably,
The one end 24a or the other end 2 is attached to the pinion shaft 24.
4d, an axial hole 24d that opens to at least one side, and an oil passage 2 that connects the axial hole 24d and the outer peripheral surface of the central portion 24c.
4e can be formed. With this configuration, the oil level OL of the stored lubricating oil in the housing 50 is
Is set in the axial hole, the lubricating oil is supplied to the supporting portion of the planetary gear 23 (that is, the central portion 24c of the pinion shaft 24 and the bearing 28 externally inserted in the central portion 24c). It can be supplied efficiently. The speed increasing device 1 is supported by the nacelle so as to incline so as to be positioned upward from the other side in the axial direction toward the one side (see FIG. 1). Therefore, as shown in FIG. 2, the oil level OL is inclined with respect to the axial direction of the housing.

Preferably, the gear mechanism 30 may be constructed such that at least a part of the first gear 32 of the gear mechanism 30 is located below the oil level OL of the stored lubricating oil. With this configuration, the stored lubricating oil can be transferred to the gear mechanism 3 with a simple configuration.
0 can be efficiently supplied to each component.

More preferably, the wind turbine generator 100.
Is configured to circulate the stored lubricating oil. That is, as shown in FIG. 1, the speed increasing device 1 according to the present embodiment
The wind turbine generator 100 to which the above is applied includes a hydraulic pump 160 that circulates and drives the stored lubricating oil, and the hydraulic pump 160.
And an electric motor 170 for driving the motor.

In this case, a filter 60 is provided in the lower part of the housing 50, and the housing 50 is constructed so that the stored lubricating oil can be taken out through the filter 60. In the present embodiment, the second lid 53 is provided with an oil extraction hole 53a having an inner end communicating with the inside of the housing and an outer end opening to the outside of the housing. The inner end of the oil outlet 53a is the filter 6
0 is connected to the downstream side, and the outer end of the oil outlet 53a is connected to the suction port of the hydraulic pump 160 via an appropriate pipe.

Further, the wind turbine generator 100 may include an oil distribution valve 180. The oil distribution valve 180
Is provided with one oil inflow portion 181 and a plurality of oil ejection portions 182, and is configured so that the oil supplied to the oil inflow portion 181 can be branched and ejected from the plurality of oil ejection portions 182. There is. The oil inflow part 181 of the oil distribution valve 180 is
It is connected to the discharge port of the hydraulic pump 160 via an appropriate pipe. The plurality of oil discharge parts 182 of the oil distribution valve 180 are respectively connected via appropriate pipes.
It communicates with the following oil supply hole formed in the central wall 51c and the second lid 53.

That is, the outer end of the second lid 53 is opened outward, and the inner end of the second lid 53 is formed on each of the bearing portions of the intermediate input shaft 31, the idle shaft 34 and the output shaft 40. First to third oil supply holes 53b to 53d which communicate with each other are formed. In addition, the central wall 51c has a fourth oil supply hole 51f having an outer end opening outward and an inner end communicating with bearings of both the idle shaft 34 and the output shaft 40.
Are formed. The plurality of oil discharge parts 182 of the oil distribution valve 180 are connected to the first to fourth oil supply ports 53b to 53d, 5
It is fluidly connected to 1f.

With this structure, the stored lubricating oil in the housing 50 can be efficiently supplied to each component of the speed increasing device 1. Reference numeral 55 in FIG. 2 is an inspection window provided in the housing 50 for visually recognizing the inside of the housing. Also, reference numeral 56 in FIG.
Is a breather for communicating the inside and the outside of the housing and discharging excess air inside the housing.
3e is an oil detection window for confirming the oil level OL.
Further, reference numeral 165 in FIG. 1 denotes an air-cooled oil cooler, which is used for connecting the hydraulic pump 160 to the oil distribution valve 180.
Provided on the outer wall of the nacelle to cool the lubricating oil supplied to it.

Finally, an operation example of the wind turbine generator 100 to which the speed increasing device 1 having such a structure is applied will be described with reference to FIG. FIG. 4A is a block diagram showing a control system of the wind turbine generator 100, and FIG. 4B is an operation flowchart of the wind turbine generator 100.

As shown in FIG. 4 (a), the wind power generator 100 has, in addition to the above configuration, an anemometer 190, a drive circuit 175 for the hydraulic pump electric motor 170, and a drive for the brake mechanism 140. Circuit 145 and control device 20
It has 0 and.

The wind turbine generator 100 having such a configuration is operated as follows, for example. That is, in step 1, the control device 200 determines that the wind speed Wm / s for rotationally driving the wind turbine 110 is αm / s based on the signal from the anemometer 190.
If the wind speed Wm / s is less than or equal to αm / s, the brake mechanism 140 is operated (that is, a braking force is applied to the output shaft 40, Stop 40). Similarly, the control device 200
In step 2, based on the signal from the anemometer 190, it is determined whether the wind speed Wm / s exceeds βm / s. If the wind speed Wm / s is βm / s or more, the braking mechanism 140 is determined. Operate.

As described above, in the operation example shown in FIG. 4B, the rotation of the output shaft 40 is forcibly stopped when the wind speed Wm / s is other than α <W <β. Due to
The electric energy generated by the generator motor 120 is stabilized. That is, when the wind speed W changes, the rotation speed of the output shaft 40 also changes. The fluctuation of the rotation speed of the output shaft 40 means the fluctuation of the rotation energy input to the generator motor 120. In view of this point of view, the present embodiment is configured such that the rotational driving force is input from the output shaft 40 to the generator motor 120 only when the rotational speed of the output shaft 40 falls within a predetermined range. Therefore, the fluctuation of the electric energy generated by the generator motor 120 is suppressed.

In steps 1 and 2 above. α <W <
If it is determined to be β, in step 3, the control device 200 drives the electric motor 170,
The stored lubricating oil in the housing 50 is circulated.

Then, in step 4, the control device 200, based on the signal from the timer 146 provided in the brake mechanism drive circuit 145, elapses a predetermined time after the electric motor 170 is started to drive, and then the brake mechanism 140. Is released (that is, the braking force on the output shaft 40 is released). Thereby, the output shaft 4
The rotational driving force is transmitted from 0 to the generator motor 120,
The power generation motor 120 starts power generation.

As described above, by releasing the brake mechanism 140 after a lapse of a predetermined time from the start of the electric motor 170, wear and / or damage of the gear mechanism 30 can be effectively suppressed. That is, the lubricating oil is supplied to the gear mechanism 30 by the hydraulic pump 160 after a lapse of a predetermined time from the start of the electric motor 170. Therefore, with such a configuration, it is possible to effectively prevent the gear mechanism 30 from operating in the oil-depleted state, and thus it is possible to effectively suppress wear and / or damage of the gear mechanism 30.

Embodiment 2 Hereinafter, a speed increasing device 1'for a wind turbine generator according to another preferred embodiment of the present invention will be described with reference to FIG. FIG. 5 is a longitudinal development view showing a state where a part of the speed increasing device 1 ′ according to the second embodiment is removed. The same or corresponding members as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

In the speed increasing device 1'according to the present embodiment, the sun gear 21 is controlled so that the axial movement thereof in the direction away from the intermediate input shaft 31 is restricted. It is connected to 31. Specifically, as shown in FIG. 5, a pin insertion hole extending in the radial direction is formed in the connecting portion 21b of the sun gear 21. Then, the pin insertion hole is pulled out so as to engage with the other end portion of the spline portion 31a of the intermediate input shaft 31 (the end portion on the side away from the sun gear 21, the right end portion in FIG. 5). The stop pin 21d is inserted.

That is, in the present embodiment, the sun gear 21 is in a range in which the sun gear 21 cannot rotate relative to the intermediate input shaft 31 via the spline portions 21c and 31a and can maintain spline connection. It is movable inside in the radial direction, and the retaining pin 21d.
The shaft cannot be moved axially in the direction away from the intermediate input shaft 31 via.

As in the first embodiment, the carrier 25 is provided in the accommodation space of the sun gear 21 located between the one end and the other end in the axial direction and the other end in the axial direction. The gear housing space is provided with an opening that communicates with the outside, and the other end portion in the axial direction is supported by the central wall 51c so as to be relatively rotatable. The opening is shaped and sized so that the sun gear 21 can be inserted therethrough.

Further, the central wall 51c has an axial hole through which the sun gear 21 can be inserted and which can bearing-support the intermediate input shaft, as in the first embodiment.

In the speed increasing device 1'having such a structure, the following effects can be obtained in addition to the effects of the first embodiment. As described above, the axial movement of the sun gear 21 in the direction away from the intermediate input shaft 31 is restricted. That is, during the operation of the planetary gear mechanism, the sun gear 21 does not move to one side in the axial direction (left side in FIG. 5), which allows the sun gear 21 to contact the carrier 25 having a different rotation speed. It is possible to prevent contact. Therefore, the durability of the sun gear and the carrier can be improved.

In the present embodiment, the sun gear 21 moves in the direction approaching the intermediate input shaft 31,
It is designed to move slightly in the axial direction. Therefore,
During operation of the planetary gear mechanism, the sun gear 21 and the intermediate input shaft 3
Although it may happen that the two come into contact with each other, the two rotate at the same rotation speed, so that damage due to friction does not pose a problem. Of course, the sun gear 21 is connected to the intermediate input shaft 3
With respect to No. 1, it is also possible to be able to move in the radial direction but not to move in both axial directions.

Further, by restricting the axial movement of the sun gear 21 in the direction away from the intermediate input shaft 31, it is possible to improve the assembly efficiency of the speed increasing device. For example, in the speed-increasing device described in the German publication cited in the section of the prior art, first, a gear that is relatively unrotatable to an intermediate input shaft is inserted into a housing, and the gear is fixed at a predetermined position in the housing. After locking, it is necessary to support the housing by inserting the intermediate input shaft into the gear. That is, in the conventional speed increasing device, it is necessary to lock various gears in the gear mechanism at predetermined positions in the housing and then install a shaft corresponding to the gears.

On the other hand, in the present embodiment,
After the carrier 25 and the planetary gear 23 are installed in the housing main body 51 from the first opening 51a on one axial side (left side in FIG. 5) of the housing main body 51,
One side and the other side in the axial direction of the housing body 51 are
When the housing body 51 is placed so as to be on the lower side and the upper side, respectively, the sun gear 21 is supported via the retaining pin 21d, and the first gear is supported via a fixing means such as shrink fit. The intermediate input shaft 31 in a state of supporting 32 is connected to the second opening 51b on the other side in the axial direction of the housing main body 51 (in this state, the second opening 51b).
b is facing upward). At this time, since the sun gear 21 is restricted from moving in the axial direction in the direction away from the intermediate input shaft 31, the sun gear 21 does not fall downward.

Similarly, the second gear 33 and the third gear 3
5 and the output shaft 40 in which the fourth gear 36 is integrally provided in the housing main body 51 from above through the second opening 51b. Can be installed.

As described above, in this embodiment, the sun gear 21 and the first gear 32 connected to the intermediate input shaft 31 outside the housing are prepared in advance, and the sun gear 21 and the first gear 32 are connected. A shaft assembly consisting of 32 and the intermediate input shaft 31 can be incorporated into the housing body 51. Similarly, the second gear 33, the third gear 35 and the idle shaft 34
A shaft assembly including the shaft assembly and a shaft coupling body including the fourth gear 36 and the output shaft 40 are assembled outside the housing in advance, and these shaft assemblies are installed in the housing main body 51. be able to.

Therefore, the assembly efficiency can be remarkably increased as compared with the conventional speed increasing device. Especially, since each gear in the speed increasing device for the wind turbine generator is large, the assembling method is effective.

[0067]

As described above, according to one aspect of the present invention, the power transmission from the planetary gear mechanism to the gear mechanism is performed by the intermediate input shaft supported by the central wall of the housing so that the axial position does not move. , The sun gear is configured to be spline-coupled to the housing in a free state, so that the sun gear is radially connected within a range in which the spline coupling between the sun gear and the intermediate input shaft is maintained. It can be moved. Therefore, 3 in the planetary gear mechanism
Good meshability of the planetary gear mechanism can be obtained without increasing the gear precision of the elements more than necessary.
The manufacturing cost can be reduced.

Further, the sun gear is connected to the intermediate input shaft so as to be immovable in at least a direction away from the intermediate input shaft, and the carrier has one end and the other end in the axial direction. Between the sun gear housing space and the other end in the axial direction, which is an opening that communicates the sun gear housing space with the outside, and has an opening through which the sun gear can be inserted. The other end of the axial line is rotatably supported by the central wall, and the central wall has an axial hole through which the sun gear is inserted and which supports the intermediate input shaft. With this configuration, the shaft assembly including the sun gear, the intermediate input shaft, and the gear provided on the intermediate input shaft can be assembled outside the housing and then assembled in the housing. Therefore, the assembly efficiency can be dramatically improved.

According to another aspect of the present invention, the carrier in the planetary gear mechanism is composed of the first and second carrier members that can be separated from each other, and the pinion shaft supporting the planetary gear has a central portion at both ends. Since it is configured to have a larger diameter than that, without increasing the size of the planetary gear mechanism,
The durability of the pinion shaft and the bearing inserted between the pinion shaft and the planetary gear can be improved.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an example of a wind turbine generator to which a speed increasing device according to an embodiment of the present invention can be applied.

FIG. 2 is a longitudinal development view of a speed increasing device according to an embodiment of the present invention.

FIG. 3 is a view taken along the line III-III in FIG.

FIG. 4 (a) is a system block diagram of the wind turbine generator shown in FIG. FIG. 4B is a flowchart showing an operation example of the wind turbine generator shown in FIG.

FIG. 5 is a partially exploded vertical development view of a speed increasing device according to another embodiment of the present invention.

[Explanation of symbols]

1 speed increasing device 10 input axes 20 Planetary gear mechanism 21 sun gear 22 Internal gear 23 planetary gears 24 pinion shaft 24a One end of pinion shaft 24b The other end of the pinion shaft 24c Pinion shaft center 24d axis hole formed in pinion shaft 24e Oil passage formed on pinion shaft 25 carriers 26 First Carrier Member 26c Bearing hole provided in the first carrier member 27 Second Carrier Member 27c Bearing hole provided in the second carrier member 28 Pinion shaft externally mounted bearing 30 gear mechanism 31 Intermediate input shaft 40 output shaft 50 housing 51a Housing first opening 51b Housing second opening 51c Housing central wall 100 wind power generator 110 windmill

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 3H078 AA26 CC13                 3J027 FA17 FA18 FA37 FB40 GC13                       GC22 GD03 GD09 GD12 GE01                       GE21                 3J063 AA40 AB02 AB12 AC01 BA01                       BA11 BB11 BB27 BB41 BB48                       CA01 CB03 CB06 CB48 CD42                       CD45 CD63 XA08 XD03 XD43                       XD73

Claims (5)

[Claims] 1. A speed increasing device for a wind turbine generator that speeds up rotational energy obtained from a wind turbine, comprising: an input shaft that operatively receives rotational energy from the wind turbine; a sun gear; A planetary gear meshed with the sun gear so as to be able to revolve, a planetary gear that is rotatably supported by a pinion shaft, and a carrier that supports the pinion shaft and that rotates with the revolution of the planetary gear. A planetary gear mechanism having an internal gear that meshes with the planetary gear, wherein the carrier is operatively connected to the input shaft, and the planetary gear mechanism is arranged coaxially with the sun gear and A gear mechanism having an intermediate input shaft coupled to the sun gear so as not to rotate relative to the axis line, and a gear train operatively coupled to the intermediate input shaft; and an output shaft operatively coupled to the gear mechanism. , The planetary gears A housing for accommodating a structure and a gear device, wherein the housing includes a first opening and a second opening respectively provided on one side and the other side in the housing axial direction that coincides with the axial direction of the planetary gear mechanism, and the first opening and the second opening. 1 opening and 2nd
A planetary gear mechanism and a gear mechanism can be inserted through the first and second openings, respectively, and the intermediate input shaft has the central wall. A speed increasing device for a wind turbine generator, which is rotatably supported by a wall, and the sun gear is spline-coupled to the intermediate input shaft. 2. The sun gear is connected to the intermediate input shaft so as to be immovable in a direction away from the intermediate input shaft, and the carrier is provided at one end and the other end in the axial direction. The sun gear accommodation space located between, and provided in the other axial end,
An opening communicating the sun gear housing space and the outside, having an opening through which the sun gear can be inserted, and the other end in the axial direction is supported relatively rotatably on the central wall. The speed increasing device for a wind turbine generator according to claim 1, wherein the central wall has an axial hole through which the sun gear is inserted and which supports the intermediate input shaft. 3. A speed increasing device for a wind turbine generator that speeds up rotational energy obtained from a wind turbine, comprising: an input shaft that operatively receives rotational energy from the wind turbine; a sun gear; A planetary gear meshed with the sun gear so as to be able to revolve, a planetary gear that is rotatably supported by a pinion shaft, and a carrier that supports the pinion shaft and that rotates with the revolution of the planetary gear. And a planetary gear mechanism having an internal gear that meshes with the planetary gear, wherein the carrier is operatively connected to the input shaft, and a housing that houses the planetary gear mechanism. A first carrier operably connected to the input shaft,
A carrier member and a second carrier member that is separably connected to the one carrier member so as to form an accommodation space for the planetary gear between the carrier member and the first carrier member; and the pinion shaft, One end portion and the other end portion are respectively supported by bearing holes formed in the first and second carrier members, and a central portion rotatably supports the planetary gear, and the pinion shaft is The speed increasing device for a wind turbine generator, wherein the central portion has a larger diameter than the one end and the other end. 4. The housing has one end in the axial direction,
The planetary gear mechanism has an opening through which the planetary gear mechanism can be inserted, and a dividing surface between the first carrier member and the second carrier member is substantially orthogonal to an axial direction of the housing. The speed increasing device for a wind turbine generator according to. 5. The housing is configured so that oil can be stored therein, and the pinion shaft has an axial hole that opens to at least one of the one end and the other end, and the axial hole and the central portion. The speed increasing device for a wind turbine generator according to any one of claims 1 to 4, further comprising an oil passage communicating with the outer peripheral surface.