DOUBLE-ROW SELF-ALIGNING ROLLER BEARING AND DEVICE FOR SUPPORTING WIND TURBINE GENERATOR MAIN SHAFT

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 (JP)
HORI MASAHARU (JP)
MAEDA TAKESHI (JP)
YAGI SOUICHI (JP)
SASABE MITSUO (JP)
MORI NOBUYUKI (JP)

Application Number:

PCT/JP2004/016977

Publication Date:

June 02, 2005

Filing Date:

November 16, 2004

Export Citation:

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Assignee:

NTN TOYO BEARING CO LTD (JP)
NAKAGAWA NAOKI (JP)
HORI MASAHARU (JP)
MAEDA TAKESHI (JP)
YAGI SOUICHI (JP)
SASABE MITSUO (JP)
MORI NOBUYUKI (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:

GB139512A	1920-07-02
JPH01128022U	1989-08-31
JPS5438749U	1979-03-14
JP2001140874A	2001-05-22
JP2000320550A	2000-11-24
JPS62282173A	1987-12-08
JP2003301850A	2003-10-24
GB539502A	1941-09-12
JP2003293940A	2003-10-15

Other References: