Bearing system for a wind turbine rotor

A technology of wind turbines and bearings, applied in the field of roller bearings, to achieve high life, improve fatigue life and usability, and avoid slippage
CN102192106AInactive Publication Date: 2011-09-21SIEMENS AG
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SIEMENS AG
Publication Date
2011-09-21
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

A bearing system for a wind turbine rotor comprises a double row tapered roller bearing (5) in O-arrangement, wherein the double row tapered roller bearing (5) comprises an inner ring (7), a circumferential row of tapered rollers (9) supported on the inner ring (7), and a floating inner rib (14), a driving device (26) as well as an removable interlocking device (17 - 24), wherein the floating inner rib (14) can be axially moved by the driving device (26) to a predetermined position so as to abut on each large roller end (11) facing axially outwards in order to apply a corresponding preload on each tapered roller (9), and rigidly coupled to the inner ring (7) by means of the interlocking device (17 - 24).
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Description

technical field

[0001] The invention belongs to the technical field of roller bearings and relates to a bearing system for a wind turbine rotor. Background technique

[0002] In wind turbine applications, large main bearings with higher operating clearances have lower rating life than bearings without clearances or bearings with optimum minimum preload. In particular, non-preloaded double row bearings in an O- or X-arrangement have lower stiffness. When these bearings are loaded with high radial forces or high tipping moments, the load distribution on the rolling elements becomes irregular. As a result, some rolling elements are subjected to high Hertzian stresses, causing premature bearing failure. In particular, the bearing stiffness depends on the preload and the load resulting from the current operating state of said bearing. Double row bearings with an excessively high preload have higher stiffness and therefore higher friction in the bearing. As a result, internal ...

Claims

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