SPEED REDUCER FOR USE IN YAW DRIVE APPARATUS FOR WIND POWER GENERATION APPARATUS, AND YAW DRIVE METHOD AND APPARATUS FOR WIND POWER GENERATION APPARATUS USING THE SPEED REDUCER

WIPO Patent Application WO/2005/015011

A1

A speed reducer and a yaw drive apparatus for a wind power generation apparatus, where the speed reducer has high efficiency and a short axial length, and suitable for the yaw drive apparatus. The speed reducer has three stages for speed reduction. The total reduction gear ratio of a first stage speed reducing portion (10) and a second stage speed reducing portion (20) is set at 1/6 to 1/60, and a third stage speed reducing portion (30) is constructed from an eccentric oscillating-type speed reducing mechanism having an internal-geared gear body (32), external gears (34), crankshafts (35), and a carrier (37). The reduction gear ratio of the eccentric oscillating-type speed reducing mechanism is set at 1/50 to 1/140, and the total reduction gear ratio of the speed reducer is set at 1/1000 to 1/3000. A yaw drive method and the yaw drive apparatus can reduce noise, and the yaw drive apparatus is inexpensive and reduced in size.

NOHARA OSAMU (JP)
YOKOYAMA KATSUHIRO (JP)
TANABE SADAYUKI (JP)

PCT/JP2004/011786

February 17, 2005

August 11, 2004

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NABTESCO CORP (JP)
NOHARA OSAMU (JP)
YOKOYAMA KATSUHIRO (JP)
TANABE SADAYUKI (JP)

F03D7/02; F16H1/32; (IPC1-7): F03D7/04; F03D9/00; F16H1/32; F16H1/36; F16H57/12

JP2003083400A	2003-03-19
JPH06351273A	1994-12-22
JP2002530590A	2002-09-17
JP2002021947A	2002-01-23
JPS59168281A	1984-09-21
JPS5629074A	1981-03-23
JPS6477761A	1989-03-23
JPS6155369A	1986-03-19
JP2003083400A	2003-03-19
DE10023400A1	2001-11-15

See also references of EP 1662138A4

NABTESCO CORPORATION (9-18 Kaigan 1-chom, Minato-ku Tokyo 22, JP)

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