JP4125149B2 - Wind power generator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wind turbine generator that converts rotational energy from a windmill into electrical energy by a generator motor.
[0002]
[Prior art]
Conventionally, various wind turbine generators configured to increase the rotational energy obtained from a windmill using a planetary gear mechanism and input it to a generator to obtain electric energy have been proposed.
[0003]
Generally, a wind turbine generator includes a windmill, an input shaft that extracts rotational power of the windmill, a speed increasing device that receives rotational power via the input shaft, and rotational power increased by the speed increasing device. An output shaft for outputting, a generator motor operatively connected to the output shaft, and a nacelle for housing the speed increasing device and the generator motor are provided.
[0004]
By the way, in order to prevent the vibration of the speed increasing device during operation from propagating to the nacelle, the wind turbine generator includes an anti-vibration support mechanism that supports the speed increasing device in an anti-vibration manner (for example, Patent Document 1). And 2).
[0005]
However, the conventional wind power generator has the following disadvantages.
That is, the wind power generator described in Patent Document 1 is supported by the nacelle in a state where the generator motor is separated from the speed increasing device.
In such a configuration, an anti-vibration support mechanism for the power generation motor is required separately, and a deflection absorbing mechanism needs to be provided on the output shaft that transmits the rotational power from the speed increasing device to the power generation motor.
[0006]
Moreover, since the wind power generator described in Patent Document 2 is configured such that the generator motor surrounds the speed increasing device, there is a problem in that the nacelle that accommodates them increases in size.
[0007]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-331758 [Patent Document 2]
Japanese Patent Laid-Open No. 2001-304094
[Problems to be solved by the invention]
The present invention has been made in view of the prior art, and provides a wind turbine generator that can effectively solve the problems caused by the vibration of the speed increasing device and the generator motor without increasing the size. Objective.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a windmill for converting wind energy into rotational power, a speed increasing device operatively connected to the wind turbine, and a speed increased by the speed increasing device. A power generation motor that converts motive power into electrical energy, a speed increasing device and a nacelle that houses the power generation device, and a rotational power from the windmill are supported so as to be rotatable about an axis so as to be input to the speed increasing device. An input shaft, and a support mechanism for supporting the speed increasing device in a vibration-proof manner while allowing the speed increasing device to swing around the axis of the input shaft, and the generator motor is free from the nacelle. A wind power generator that is integrally connected to the speed increasing device in a state.
[0010]
Preferably, a bearing mechanism that rotatably supports the input shaft about an axis can be further provided.
The bearing mechanism may include a self-aligning bearing member that automatically adjusts the axial position of the input shaft.
In one aspect, the bearing mechanism may further include a bearing member that is spaced apart from the self-aligning bearing member in the axial direction of the input shaft.
[0011]
Preferably, the input shaft is a hollow shaft.
In such an aspect, the wind turbine generator further includes an operation shaft for adjusting a pitch angle of blades in the windmill, the operation shaft inserted through the hollow input shaft, and the operation shaft based on an external operation. And a pitch angle adjusting device including an actuating device for operating the device.
The actuating device may be coupled to the speed increasing device in a free state with respect to the nacelle.
[0012]
For example, the generator motor is integrally connected to the speed increasing device via a flange member connected to the speed increasing device so as to surround an output shaft that extracts an output from the speed increasing device.
Instead of this, the generator motor can be integrally connected to the speed increasing device via a gantry member connected to the speed increasing device.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a wind power generator according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic external view of a wind turbine generator 1A according to the present embodiment. FIG. 2 is a longitudinal development view of the wind power generator 1A, and FIG. 3 is a view taken in the direction of arrow III in FIG.
[0014]
As shown in FIGS. 1 to 3, the speed increasing device 20 includes a wind turbine 10 that converts wind energy into rotational power, a speed increasing device 20 that is operatively connected to the wind turbine 10, and the speed increasing device. The power generation motor 30 that converts the rotational power increased by the electric power 20 into electric energy, the speed increasing device 20 and the nacelle 40 that houses the power generation device 30, and the rotational power from the windmill 10 to the speed increasing device 20. An input shaft 50 for inputting, a bearing mechanism 60 for supporting the input shaft 50, a support mechanism 70 for supporting the speed increasing device 20, and an output for transmitting rotational power from the speed increasing device 20 to the power generation motor 30. A shaft 80 is provided.
The wind turbine generator 1A according to the present embodiment includes a tower 90, and the tower 90 can hold the nacelle 40 at a predetermined height.
[0015]
The input shaft 50 is configured such that a front end portion extends outward from the nacelle 40 and a rear end portion enters the nacelle.
The front end of the input shaft 50 is connected to the central rotating body 11 in the windmill 10, and rotates about the axis along with the rotation of the windmill 10.
[0016]
In the present embodiment, from the viewpoint of ease of manufacture and ease of assembly, the input shaft 50 is connected to the wind turbine 10 on the drive side input shaft 51, and the front end portion is about the axis of the drive side input shaft 51. A divided structure having a driven-side input shaft 52 that is connected so as not to be relatively rotatable and whose rear end is connected to the speed increasing device 20 is employed.
The connection structure of the drive side input shaft 51 and the driven side input shaft 52 will be described later.
[0017]
In the present embodiment, the input shaft 50 is a hollow shaft, and an operation shaft 111 for adjusting the pitch angle of each blade 12 in the wind turbine 10 is inserted into the hollow input shaft 50.
That is, the wind turbine generator 1A according to the present embodiment includes a pitch angle adjusting device 110 that adjusts the pitch angle of each blade 12.
[0018]
The pitch angle adjusting device 110 includes the operating shaft 111 that is slidably inserted in the hollow input shaft 50 in the axial direction, and an operating device 112 that slides the operating shaft 111 in the axial direction based on an external operation. The operation shaft 111 and the link 113 that links the blades 12 are linked.
In the present embodiment, the operating device 112 is connected to the speed increasing device 20 in a free state with respect to the nacelle so as to be positioned concentrically with the input shaft 50.
[0019]
More preferably, the wind power generator 1 </ b> A can include a brake mechanism 100 that applies / releases a braking force to the power transmitted from the windmill 10 to the power generation motor 30.
By providing such a brake mechanism 100, it is possible to effectively prevent excessive rotational power from being transmitted to the power generation motor 30 when the wind speed exceeds a predetermined range.
In the present embodiment, the brake mechanism 100 is configured to apply a braking force to the driven side input shaft 52.
That is, the brake mechanism 100 is supported by the brake disk 101 supported so as not to rotate relative to the driven-side input shaft 52 and the gear box 25 in the speed increasing device 20 so as not to rotate relative to the following gear box 25 and to be slidable in the axial direction. Brake shoes 102 are provided.
[0020]
More preferably, the wind power generator 1 </ b> A can include a turning mechanism (not shown) for directing the windmill 10 in a direction perpendicular to the wind direction between the nacelle 40 and the tower 90.
The turning mechanism is provided together with the pitch angle adjusting device 110 in order to put the output rotational speed from the windmill 10 in a range suitable for the generator motor 30 in accordance with the wind direction.
[0021]
The bearing mechanism 60 is configured to support the input shaft 50 so as to be rotatable about an axis.
In the present embodiment, the bearing mechanism 60 has a single self-aligning bearing member 61.
The self-aligning bearing member 61 supports the drive-side input shaft 51 so that the drive-side input shaft 51 can rotate about its axis and the axis position can be automatically aligned to a predetermined setting position.
Further, in the present embodiment, the drive-side input shaft 51 and the driven-side input shaft 51 and the driven-side input shaft 52 are connected to each other while the drive-side input shaft 51 and the driven-side input shaft 52 are aligned with each other. A taper-type shaft coupling 53 is provided that fits one of the opposing end portions of the input shaft 52 into the other and surrounds the connecting portion between the two.
[0022]
As shown in FIG. 2, the speed increasing device 20 includes a speed increasing gear mechanism 21 operatively connected to the input shaft 50 (in this embodiment, the driven side input shaft 52), and the speed increasing gear. And a gear box 25 that houses the mechanism.
[0023]
In the present embodiment, the gear box 25 has a box body 26 whose one end face is opened, and a lid body 27 connected to the box body 26 so as to close the opening.
Specifically, the box body 26 has a rear wall 26a and a peripheral wall 26b extending forward from the peripheral edge of the rear wall 26a, and the front is an opening 26c.
The input shaft 50 (in this embodiment, the driven-side input shaft 52) is supported by the lid 27 and the rear wall 26a of the box body 26 so as to be rotatable about its axis.
[0024]
The speed increasing gear mechanism 21 can adopt various modes.
In the present embodiment, the gear mechanism 21 meshes with the first drive side gear 22a and the first drive side gear 22a supported on the input shaft 50 (driven side input shaft 52) so as not to be relatively rotatable. A first driven gear 22b, an intermediate shaft 23 that supports the first driven gear 22b so as not to be relatively rotatable, a second drive gear 24a that is supported by the intermediate shaft 23 so as not to be relatively rotatable; And a second driven gear 24b supported on the output shaft 80 so as not to rotate relative to the drive side gear 24a.
[0025]
The support mechanism 70 is configured to support the speed increasing device 20 in a vibration-proof manner while allowing the speed increasing device 20 to swing around the axis of the input shaft 50.
That is, the gear box 25 receives a reaction force when power is transmitted from the windmill 10 to the speed increasing gear mechanism 21 via the input shaft 50. Therefore, when the gear box 25 is fixedly supported with respect to the nacelle 40, vibration caused by the reaction force propagates to the nacelle 40.
[0026]
In view of this, the support mechanism 70 is configured to support the speed increasing device 20 in a vibration-proof manner while allowing the speed increasing device 20 to swing around the axis of the input shaft 50. .
Specifically, as shown in FIG. 3, the support mechanism 70 includes a center part 71 a connected to the gear box 25 and a pair of arm parts 71 b extending from the center part outward in the horizontal direction. And an anti-vibration member 72 interposed between each of the pair of arm portions 71b of the support member 71 and the inner bottom surface of the nacelle 40.
[0027]
By the way, in the present embodiment, as described above, the drive-side input shaft 51 is supported at one point by the single self-aligning bearing member 61 at the axial center portion. A front end portion of 51 is connected to the wind turbine 10, and a rear end portion of the driven side input shaft 52 is connected to the speed increasing device 20.
In such a configuration, when the wind turbine 10 swings due to the action of wind power, the speed increasing device 20 swings three-dimensionally around the axis of the input shaft 50.
[0028]
In order to absorb the three-dimensional swing of the speed increasing device 20, the wind turbine generator 1 </ b> A according to the present embodiment is the reverse of the pair of arm portions 71 b as the vibration isolation member 72. Anti-vibration rubber 73b arranged in a V shape is used.
[0029]
That is, as shown in FIG. 3, the wind turbine generator 1 </ b> A according to the present embodiment includes a V-shaped supported surface 73 a provided on each of the pair of arm portions 71 b as the vibration isolation member 72, and An anti-vibration rubber 73b disposed in an inverted V-shape so as to contact the V-shaped supported surface 73a and a base 73c configured to support the anti-vibration rubber 73b are provided.
[0030]
The output shaft 80 is rotatably supported by the gear box 25 with at least one end extending outward from the gear box 25 in order to transmit rotational power to the generator motor 30. .
In the present embodiment, the output shaft 80 has a rear end portion extending rearward from the gear box 25 at a position offset in parallel from the driven side input shaft 52, and the lid of the gear box 25. The body 27 and the rear wall 26a are rotatably supported.
[0031]
The generator motor 30 operatively connected to the output shaft 80 is integrally connected to the speed increasing device 20 in a free state with respect to the nacelle 40.
The wind turbine generator 1A according to the present embodiment includes a flange member 85 connected to the gear box so as to surround a rearward extending portion of the output shaft 80, and the power generation motor 30 includes the flange member 85. It is connected to the gear box 25 via
[0032]
Thus, the wind power generator 1A according to the present embodiment integrally connects the power generation motor 30 to the speed increasing device 20 in a free state with respect to the nacelle 40, thereby achieving the following effects. Play.
That is, when the generator motor 30 is supported by the nacelle 40 in a state separated from the speed increasing device 20, an anti-vibration support mechanism for the power generating motor is separately required and the output from the speed increasing device 20 is It is necessary to provide a deflection absorbing mechanism in the output shaft 80 that transmits the power to the generator motor.
[0033]
On the other hand, in the present embodiment, as described above, the generator motor 30 is integrally connected to the speed increasing device 20 in a free state with respect to the nacelle 40.
Therefore, it is not necessary to provide the vibration isolating support mechanism for the generator motor and the bending absorbing mechanism for the output shaft, and the cost can be reduced and the structure can be simplified.
[0034]
In the present embodiment, power is transmitted from the speed increasing device 20 to the generator motor 30 via the output shaft 80 offset in parallel to the driven-side input shaft 52.
Therefore, the whole wind power generator can be reduced in size and simplified as compared with other conventional power generators that are configured to surround the speed increasing device.
[0035]
Preferably, the support mechanism 70 is configured to support the connection body in the vicinity of the center of gravity of the connection body of the speed increasing device 20 and the generator motor 30.
In the present embodiment, since the generator motor 30 is supported behind the gear box 25, the support member 71 is connected to the rear wall 26a of the gear box 25.
[0036]
In the present embodiment, the generator motor 30 is integrally connected to the speed increasing device 20 via the flange member 85, but the present invention is not limited to such a form.
That is, as shown in FIGS. 4 and 5, it is possible to provide a gantry member 86 connected to the speed increasing device 20 and to support the power generation motor 30 on the gantry member 86.
[0037]
Further, in the present embodiment, an example in which the single self-aligning bearing member 61 is provided as the bearing mechanism 60 has been described as an example, but it is needless to say that other types of bearing mechanisms can be provided. is there.
For example, as shown in FIG. 6, in addition to the self-aligning bearing member 61, the bearing mechanism 60 is not limited to the self-aligning bearing member 61, but is separated from the self-aligning bearing member 61 in the axial direction of the input shaft 50. A bearing member 62 can also be provided.
[0038]
In such a configuration, the driving side input shaft 51 is supported at two points spaced apart in the axial direction, and accordingly, the driven side input shaft 52 coupled to the driving side input shaft 51 and the speed increasing unit. The device 20 does not swing three-dimensionally around the axis of the drive side input shaft 51.
Therefore, in this embodiment, the drive side input shaft 51 and the driven side input shaft 52 can be connected by a general flange joint 54 (see FIG. 6), and the support mechanism 70 has an inverted V shape. Instead of the vibration-proof rubber 73b disposed, a spring 74 disposed so as to be extendable in the vertical direction can be provided (see FIG. 7).
[0039]
【The invention's effect】
As described above, according to the wind turbine generator according to the present invention, the generator motor to which the rotational power is transmitted from the speed increasing device via the output shaft is integrated with the speed increasing device in a free state with respect to the nacelle. Therefore, it is possible to effectively solve the problems caused by the vibration of the speed increasing device and the generator motor without causing an increase in size.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing a wind turbine generator according to an embodiment of the present invention.
FIG. 2 is a partial longitudinal sectional view of the wind turbine generator shown in FIG.
FIG. 3 is a view taken along arrow III in FIG. 2;
FIG. 4 is a partial vertical cross-sectional view of a wind turbine generator according to another embodiment of the present invention.
FIG. 5 is a view taken in the direction of arrow V in FIG. 4;
FIG. 6 is a partial longitudinal sectional view of a wind turbine generator according to still another embodiment of the present invention.
FIG. 7 is a view taken along arrow VII in FIG. 6;
[Explanation of symbols]
1A Wind turbine generator 10 Wind turbine 20 Speed increasing device 30 Generator motor 40 Nacelle 50 Input shaft 60 Bearing mechanism 61 Self-aligning bearing member 62 Bearing member 70 Support mechanism 80 Output shaft 85 Flange member 86 Base member 110 Pitch angle adjusting device 111 Operation Shaft 112 actuator

Claims (6)

A windmill that converts wind energy into rotational power;
A speed increasing device operatively connected to the windmill;
A generator motor that converts the rotational power increased by the speed increasing device into electrical energy;
A nacelle that houses the speed increasing device and the power generation device;
An input shaft that is rotatably supported around an axis so that rotational power from the windmill can be input to the speed increasing device;
A support mechanism for supporting the speed increasing device in a vibration-proof manner while allowing the speed increasing device to swing around the axis of the input shaft;
The wind power generator, wherein the generator motor is integrally connected to the speed increasing device in a free state with respect to the nacelle. A bearing mechanism for rotatably supporting the input shaft about an axis;
The wind turbine generator according to claim 1, wherein the bearing mechanism includes a self-aligning bearing member that automatically adjusts an axial position of the input shaft. The wind turbine generator according to claim 2, wherein the bearing mechanism further includes a bearing member that is spaced apart from the self-aligning bearing member in the axial direction of the input shaft. The input shaft is a hollow shaft,
The wind power generator further includes an operating shaft for adjusting a pitch angle of a blade in the windmill, and an operating shaft that is inserted through the hollow input shaft and an operating device that operates the operating shaft based on an external operation. And a pitch angle adjusting device including
The wind power generator according to any one of claims 1 to 3, wherein the operating device is connected to the speed increasing device in a free state with respect to the nacelle. The generator motor is integrally connected to the speed increasing device via a flange member connected to the speed increasing device so as to surround an output shaft for taking out an output from the speed increasing device. The wind turbine generator according to any one of claims 1 to 4. The wind power generator according to any one of claims 1 to 4, wherein the generator motor is integrally connected to the speed increasing device via a gantry member connected to the speed increasing device. .

Images