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Rolling contact fatigue test method of small sample turnplate bearing

A technology of rolling contact fatigue and slewing bearings, which is applied in mechanical bearing testing and other directions, to achieve the effects of low cost, simple and easy testing, and saving time and cost

Active Publication Date: 2012-03-28
NANJING GONGDA CNC TECH
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Problems solved by technology

[0010] The invention applies pure axial force to the slewing bearing, divides the raceway of the slewing bearing into several areas when analyzing the failure situation, and evaluates the equivalent dynamic load-fatigue life-reliability of the entire slewing bearing by counting the failure of each area Model, so as to realize the rolling contact fatigue test of small sample slewing bearings. At present, there is no similar test method at home and abroad. This method is the first

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  • Rolling contact fatigue test method of small sample turnplate bearing
  • Rolling contact fatigue test method of small sample turnplate bearing
  • Rolling contact fatigue test method of small sample turnplate bearing

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with accompanying drawing:

[0031] Such as figure 1 ,, Implementation steps:

[0032] The implementation process of the present invention is available figure 1 The schematic diagram shown in the description can be divided into the following steps:

[0033] (1) Assembly test bench;

[0034] (2) Apply a pure axial force between 0.25 and 2 times Ca to the slewing bearing to be tested to drive the slewing bearing;

[0035] (3) If a new fault signal is observed during the test, disassemble the machine for inspection and divide the raceway of the slewing bearing into several areas. 7 Disassemble and check when turning to integer multiples;

[0036] (4) Count the number of damaged areas of the inner and outer ring raceways;

[0037] (5) If the number of damaged areas is less than N / 5, calculate the reliability of the turntable bearing according to formulas (3) to (5), then re-clean and assemble the tes...

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Abstract

The invention provides a rolling contact fatigue test method of a small sample turnplate bearing, comprising the following steps: dividing the raceway of a turnplate bearing into a plurality of areas artificially, exerting a pure axial force to the turnplate bearing, fitting an equivalent weight dynamic load-fatigue life-reliability model of the turnplate bearing according to the statistic of failures of each divided area, and evaluating the fatigue resistance capability of the turnplate bearing. The rolling contact fatigue test method of the small sample turnplate bearing only needs one to four turnplate bearings to evaluate the rolling contact fatigue resistance capability of the turnplate bearing through test, so the method is especially suitable for test evaluation of a giant turnplate bearing, is simple and easy to test and has the advantages of low cost, less investment on test and time and cost saving.

Description

technical field [0001] The invention relates to a rolling contact fatigue testing method, in particular to a rolling contact fatigue testing method of a small sample turntable bearing. Background technique [0002] The rolling contact fatigue (RCF) life of a bearing is defined based on statistical principles. It is described by the number of turns or time when the bearings of the same batch and specification reach the expected failure probability, and the slewing bearing is of course no exception. [0003] The bearing life design theory widely used in engineering is developed on the basis of the Lundberg-Palmgren theory (such as formula 1), which is also a recognized theory for rolling contact fatigue life analysis. After a certain evolution, the theory has formed Now the general bearing life design model (Formula 2) in the bearing industry has been developed into an international standard. [0004] ln 1 S = ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/04
Inventor 黄筱调高学海洪荣晶王华陈捷
Owner NANJING GONGDA CNC TECH
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