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Title:
DOUBLE-ROW SELF-ALIGNING ROLLER BEARING AND DEVICE FOR SUPPORTING WIND TURBINE GENERATOR MAIN SHAFT
Document Type and Number:
WIPO Patent Application WO/2005/050038
Kind Code:
A1
Abstract:
A double-row self-aligning roller bearing used for applications, such as a device for supporting a wind turbine generator main shaft, where a thrust load is received at either of the rows. A load is appropriately supported at each row depending on the magnitude of the load, and this extends real life. Further, the bearing is economical because materials are used in a waste-less manner. Double row rollers (4, 5) are interposed between an inner ring (2) and an outer ring (3). A raceway surface (3a) of the outer ring (3) has a spherical shape, and the outer diameter surfaces of rollers (4, 5) are shaped so as to match a raceway surface (3a) of the outer ring (3). The rollers (4, 5) in the left and right rows have different lengths (L1, L2), and contact angles theta1, theta2 in the left and right rows are different.

Inventors:
Nakagawa, Naoki c/o NTN Corporation (3066 Aza Oyumida Oaza Higashikat, Kuwana-shi Mie, 511-0811, JP)
Hori, Masaharu c/o NTN Corporation (3066 Aza Oyumida Oaza Higashikat, Kuwana-shi Mie, 511-0811, JP)
Maeda, Takeshi c/o NTN Corporation (3066 Aza Oyumida Oaza Higashikat, Kuwana-shi Mie, 511-0811, JP)
Yagi, Souichi c/o NTN Corporation (3066 Aza Oyumida Oaza Higashikat, Kuwana-shi Mie, 511-0811, JP)
Sasabe, Mitsuo c/o NTN Corporation (3-17 Kyomachibori 1-chome, Nishi-k, Osaka-shi Osaka, 550-0003, JP)
Mori, Nobuyuki c/o NTN Corporation (3066 Aza Oyumida Oaza Higashikat, Kuwana-shi Mie, 511-0811, JP)
Application Number:
PCT/JP2004/016977
Publication Date:
June 02, 2005
Filing Date:
November 16, 2004
Export Citation:
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Assignee:
NTN CORPORATION (3-17, Kyomachibori 1-chome Nishi-k, Osaka-shi Osaka, 550-0003, JP)
Nakagawa, Naoki c/o NTN Corporation (3066 Aza Oyumida Oaza Higashikat, Kuwana-shi Mie, 511-0811, JP)
Hori, Masaharu c/o NTN Corporation (3066 Aza Oyumida Oaza Higashikat, Kuwana-shi Mie, 511-0811, JP)
Maeda, Takeshi c/o NTN Corporation (3066 Aza Oyumida Oaza Higashikat, Kuwana-shi Mie, 511-0811, JP)
Yagi, Souichi c/o NTN Corporation (3066 Aza Oyumida Oaza Higashikat, Kuwana-shi Mie, 511-0811, JP)
Sasabe, Mitsuo c/o NTN Corporation (3-17 Kyomachibori 1-chome, Nishi-k, Osaka-shi Osaka, 550-0003, JP)
Mori, Nobuyuki c/o NTN Corporation (3066 Aza Oyumida Oaza Higashikat, Kuwana-shi Mie, 511-0811, JP)
International Classes:
F03D11/00; F16C19/50; F16C19/54; F16C19/56; F16C23/08; F16C33/36; F16C33/60; F16C33/62; F16C33/64; (IPC1-7): F16C23/08; F16C19/38; F16C33/60; F16C19/54; F03D11/04
Foreign References:
GB139512A1920-07-02
JPH01128022U1989-08-31
JPS5438749U1979-03-14
JP2001140874A2001-05-22
JP2000320550A2000-11-24
JPS62282173A1987-12-08
JP2003301850A2003-10-24
GB539502A1941-09-12
JP2003293940A2003-10-15
Other References:
See also references of EP 1705392A4
Attorney, Agent or Firm:
Sugimoto, Shuji (Higobashi Nittai Bldg, 10-2 Edobori 1-chome, Nishi-k, Osaka-shi Osaka, 550-0002, JP)
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