Evaluation method for rolling contact fatigue reliability of slewing bearings
A technology of rolling contact fatigue and slewing bearings, which is applied in mechanical bearing testing and other directions, can solve problems such as the inability to evaluate the operating reliability of slewing bearings, and achieve the effect of accurate reliability
Active Publication Date: 2016-01-13
上海欧际柯特回转支承有限公司
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Problems solved by technology
[0004] At present, the bearing design mostly calculates the life of the bearing at 90% reliability according to the relevant standards, and takes a certain safety margin, but it cannot evaluate the operating reliability of the slewing bearing under the design working conditions. For wind power generation and other high reliability requirements In application occasions, using reliability design theory to accurately evaluate the operational reliability of slewing bearings has important guiding significance for the design and maintenance of slewing bearings
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[0050] Assuming a slewing bearing, it can be divided into one working condition according to the difference in load and swing amplitude, and the service reliability of the slewing bearing is estimated under the compound action of this working condition.
[0051] When estimating the service reliability of the slewing bearing, first of all, according to the swing range under various working conditions from small to large, the various working conditions are sorted as shown in Table 1. In Table 1, LDC i Indicates the i-th working condition, N osci is the number of swing cycles of the slewing bearing under the i-th working condition, is the swing amplitude of the slewing bearing ball relative to the inner and outer rings under the i-th working condition, Q i is the load of the slewing bearing in the i-th working condition. The load here is a general concept, which can be a group of composite loads, or the equivalent load after equivalent conversion of the composite loads.
[0052]...
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The invention relates to a revolution bearing rolling contact fatigue reliability evaluation method. The method comprises the technical steps of step 1, ranking all I conditions according to the swing amplitude; step 2, carrying out load unifying and cycle period equivalent conversion; step 3, dividing I loading zones according to a load cycle period; step 4, determining the swing cycle times and the swing amplitude of each ball in each zone; step 5, judging the relationship between the swing amplitude of each ball in each zone and pi / Z, and respectively calculating the reliability of each independent zone; and step 6, calculating the reliability of revolution bearing. The method provided by the invention has the advantages that the reliability of the revolution bearing operation under a complex condition can be accurately estimated.
Description
technical field [0001] The invention relates to a slewing bearing, in particular to a method for evaluating the reliability of rolling contact fatigue of the slewing bearing. Background technique [0002] The slewing ring can generally be regarded as a giant inner ring or outer ring with transmission teeth. It is an indispensable part of almost all equipment that requires relative slewing. It is widely used in large-scale equipment such as port machinery, mining machinery, wind power generation, and radar. . Compared with ordinary bearings, the working environment of slewing bearings is harsher, the load conditions are more complex, and the requirements for operating life and reliability are higher. Once failure causes greater economic and social benefit losses. [0003] Practice has proved that in order to ensure the long life and high reliability of the slewing bearing and reduce the loss of benefits caused by unpredictable failures, in addition to improving the inherent ...
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IPC IPC(8): G01M13/04
Inventor 邱涧峰黄筱调高学海
Owner 上海欧际柯特回转支承有限公司