Wind power generation device

Patent metadata

Field	Value
Publication number	US-2016010629-A1
Application number	US-201414773847-A
Country	US
Kind code	A1
Filing date	Mar 4, 2014
Priority date	Mar 12, 2013
Publication date	Jan 14, 2016
Grant date	—

Abstract

A one-way clutch used in a wind power generation device integrally rotatably connects an input rotating body and an output rotating body to each other in a state in which a rotational speed of the input rotating body exceeds a rotational speed of the output rotating body, and breaks connection between the input rotating body and the output rotating body in a state in which the rotational speed of the input rotating body is lower than the rotational speed of the output rotating body. The input rotating body and the output rotating body are allowed to relatively move along an axial direction, and a maximum allowance of movement is set to be larger than variation of a distance along the axial direction between an input shaft and an output shaft caused by state change.

First claim

1 . A wind power generation device comprising:
a wind receiving member which receives a wind force to rotate a main shaft; a speed-up gear which comprises a rotation transmission mechanism which receives rotation of the main shaft to increase the rotation in speed, and a rolling bearing which rotatably supports an output shaft which outputs a running torque of the rotation transmission mechanism; a power generator which comprises an input shaft which rotates by receiving rotation of the output shaft, and which generates power in accordance with rotation of a rotor which rotates integrally with the input shaft; an input rotating body which is integrally rotatably provided on the output shaft; an output rotating body which is integrally rotatably provided on the input shaft and which is coaxially disposed radially inside or radially outside the input rotating body; and a one-way clutch which is disposed between the input rotating body and the output rotating body, which integrally rotatably connects the input rotating body and the output rotating body to each other in a state in which a rotational speed of the input rotating body exceeds a rotational speed of the output rotating body, and which breaks connection between the input rotating body and the output rotating body in a state in which the rotational speed of the input rotating body is lower than the rotational speed of the output rotating body, wherein the input rotating body and the output rotating body are allowed to relatively move along an axial direction, and a maximum allowance of movement thereof is set to be larger than variation of a distance along the axial direction between the input shaft and the output shaft caused by state change.

2 . The wind power generation device according to claim 1 ,
wherein the one-way clutch comprises:
an inner ring outer circumferential surface provided on a side of one rotating body out of the input rotating body and the output rotating body;
an outer ring inner circumferential surface provided on a side of the other rotating body and disposed radially outside the inner ring outer circumferential surface; and
a plurality of engaging elements disposed along a circumferential direction at intervals in a space formed between the inner ring outer circumferential surface and the outer ring inner circumferential surface,
wherein the input rotating body and the output rotating body are integrally rotatably connected to each other when the engaging elements engaged with the inner ring outer circumferential surface and the outer ring inner circumferential surface, and the connection is broken when the engagement therebetween is released, and wherein a cylindrical roller bearing which relatively rotatably supports the input rotating body and the output rotating body is provided between the input rotating body and the output rotating body.

3 . The wind power generation device according to claim 2 ,
wherein the inner ring outer circumferential surface and the outer ring inner circumferential surface are formed as cylindrical surfaces, and the engaging elements are formed by sprags.

4 . The wind power generation device according to claim 3 ,
wherein the inner ring outer circumferential surface is formed by an outer circumferential surface of one rotating body disposed radially inside, out of the input rotating body and the output rotating body.

5 . The wind power generation device according to claim 2 ,
wherein a plurality of wedge-shaped spaces are formed between the inner ring outer circumferential surface and the outer ring inner circumferential surface, and each of the engaging elements is formed by a cylindrical roller disposed in each of the wedge-shaped spaces.

6 . The wind power generation device according to claim 2 ,
wherein an inner circumferential surface of one rotating body disposed radially outside, out of the input rotating body and the output rotating body, is formed as a cylindrical surface, and configures the outer ring inner circumferential surface and an outer ring raceway surface.

7 . The wind power generation device according to claim 1 ,
wherein the input rotating body and the output rotating body form a shaft coupling device which integrally rotatably connects the output shaft and the input shaft to each other, and the one-way clutch is incorporated in the shaft coupling device.

8 . A wind power generation device comprising:
a speed-up gear which increases a speed of rotation of a main shaft caused by a wind force to output the rotation increased in speed from an output shaft; a power generator which comprises an input shaft which rotates by receiving the rotation of the output shaft, and which generates power in accordance with rotation of a rotor which rotates integrally with the input shaft; and a one-way clutch which is provided between the output shaft and the input shaft, which integrally rotatably connects the output shaft and the input shaft to each other in a state in which a rotational speed of the output shaft exceeds a rotational speed of the input shaft, and which breaks connection between the output shaft and the input shaft in a state in which the rotational speed of the output shaft is lower than the rotational speed of the input shaft, wherein the one-way clutch comprises:
a ring which is fit on a rotating body which rotates with the output shaft;
another circumferential surface which is disposed to oppose outside or inside of a circumferential surface of the ring in a radial direction and which is provided on a side of the input shaft; and
a plurality of engaging elements disposed in a space between the circumferential surfaces,
wherein the output shaft and the input shaft are integrally rotatably connected to each other by causing the engaging elements to engage the circumferential surfaces, and the connection is broken by releasing the engagement therebetween, wherein a maximum transmission torque T 1 max to be transmitted from the rotating body to the ring when a load torque for operating the power generator is maximum and a transmission torque T 2 which can be transmitted from the rotating body to the ring with a tightening force obtained by fitting the ring on the rotating body satisfy a relationship of T 1 max>T 2 , and wherein a necessary minimum transmission torque T 1 to be transmitted from the rotating body to the ring for operating the power generator, a transmission torque T 3 which can be transmitted from the rotating body to the ring with a tightening force obtained by engagement of the engaging elements with the circumferential surfaces, and the transmission torque T 2 satisfy a relationship of T 1 <T 2 +T 3 .

9 . A wind power generation device comprising:
a speed-up gear which increases a speed of rotation of a main shaft caused by a wind force to output the rotation increased in speed from an output shaft; a power generator which comprises an input shaft which rotates by receiving the rotation of the output shaft, and which generates power in accordance with rotation of a rotor which rotates integrally with the input shaft; and a one-way clutch which is provided between the output shaft and the input shaft, which integrally rotatably connects the output shaft and the input shaft to each other in a state in which a rotational speed of the output shaft exceeds a rotational speed of the input shaft, and which breaks connection between the output shaft and the input shaft in a state in which the rotational speed of the output shaft is lower than the rotational speed of the input shaft, wherein the one-way clutch comprises:
a ring which is fit on a rotating body which rotates with the input shaft;
another circumferential surface disposed to oppose outside

Assignees

• Jtekt Corp

Inventors

• Fujiwara Hideki
• Ootsuka Kazushige

Classifications

• F03D15/10 Primary

  using gearing not limited to rotary motion, e.g. with oscillating or reciprocating members · CPC title

• F05B2260/4031

  as in toothed gearing · CPC title

• F03D80/70

  Bearing or lubricating arrangements · CPC title

• F03D9/25

  the apparatus being an electrical generator (F03D9/22 takes precedence) · CPC title

• F03D15/00 Primary

  Transmission of mechanical power · CPC title