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White etching cracks robustness increase of a roller bearing

A roller bearing, robust technology, applied in the field of fatigue strength of roller bearings, can solve problems such as white etching cracks that are difficult to find an effective way

Inactive Publication Date: 2013-04-03
HANSEN TRANSMISSIONS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As long as this mechanism is not discovered, it will remain difficult to find effective ways to avoid or at least reduce the formation of WECs

Method used

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  • White etching cracks robustness increase of a roller bearing
  • White etching cracks robustness increase of a roller bearing
  • White etching cracks robustness increase of a roller bearing

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Embodiment Construction

[0018] In the description the invention will be described using different embodiments. Accordingly, reference will be made to different drawings. It should be understood that these drawings are not intended to be limiting and that the invention is limited only by the claims. The drawings are therefore for illustration purposes and the dimensions of some elements in the drawings are exaggerated for clarity.

[0019] The term "comprising" is not to be construed as limiting the invention in any way.

[0020] The term "comprising" used in the claims is intended to limit what is described thereafter; it does not exclude other elements, parts or steps.

[0021] The term "connected" as used in the claims and in the description should not be construed as being restricted to direct connections unless otherwise indicated. Therefore, the connection of part A to part B is not limited to part A directly contacting part B, but also includes indirect contact between part A and part B, in ...

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Abstract

The present invention provides a method for increasing white etching cracks robustness of a roller bearing. The method comprises forming a white layer on a bearing raceway surface of the roller bearing and / or a material zone at the bearing raceway surface which has a lower yield point or yield stress than the original material by heating the roller bearing to a temperature of between 100 DEG C and 200 DEG C for a time period of between 5 minutes and 2 hours while bringing the bearing raceway surface in contact with a chemical additive.

Description

technical field [0001] The present invention relates to a method for increasing the robustness of white etch cracks in roller bearings. More specifically, the present invention relates to a method for increasing the fatigue strength of roller bearings, mainly machine parts made of steel, for reducing the formation of so-called "while etching cracks" in such roller bearings. " or "brittle flakes" trend. Background technique [0002] Certain symptoms of wear and fatigue are known to occur when mechanical parts roll and slide on each other. A special form of this fatigue is known from certain ball and roller bearings, which are used, for example, in wind turbines for rotatably supporting the rotor shaft in the housing of the wind turbine, or for example in planetary gears The unit is used to support the planet gears relative to the planet carrier. [0003] After having been loaded for example for more than 2500 hours or for example for more than 10000 hours, fatigue phenomen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/40C23C22/02
CPCF16C19/52F16C33/30C21D9/38F16C2360/31F16C2361/61F16C33/64F16C33/14C21D9/36C21D9/32
Inventor 约翰·卢伊克斯格里尔特·沃特
Owner HANSEN TRANSMISSIONS
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