Accelerated degradation test method of knuckle bearing

A technology of accelerated degradation test and joint bearing, applied in the direction of mechanical bearing testing, etc., can solve the problems such as research reports on the accelerated degradation test method of joint bearing that have not been seen.

Inactive Publication Date: 2013-09-25
NAT UNIV OF DEFENSE TECH
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the accelerated degradation test has been applied in the performance degradation life prediction of light-emitting diodes, logic integrated circuits, power supplies, insulators, pharmaceuticals, etc., and there is no research report on the accelerated degradation test method of joint bearings.

Method used

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  • Accelerated degradation test method of knuckle bearing
  • Accelerated degradation test method of knuckle bearing
  • Accelerated degradation test method of knuckle bearing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Example 1 , Joint bearing accelerated degradation test

[0051] Step 1. Set the number of accelerated stress levels h of the load to 3. Due to the limitation of the test time and conditions, the sample size n of the joint bearing is 2, and the samples are respectively marked as M 1 ,M 2 , the two samples were sequentially clamped on a joint bearing swing test bench for testing.

[0052] The load S of the joint bearing in normal use 0 =1000N. The highest level of load obtained through the pre-test is set to 5500N, which can ensure the consistency of the degradation mechanism under normal use conditions. The accelerated stress levels for the given loads are therefore:

[0053] S 1 =2000N, S 2 =3500N, S 3 =5500N.

[0054] Step 2. Install the joint bearing test piece into the tooling, and then install the installed tooling on the main frame of the joint bearing swing test bench, then connect the torsion actuator and the tooling, and then connect and adjust the dis...

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Abstract

The invention belongs to the technical field of accelerated tests of a knuckle bearing, and relates to an accelerated degradation test method of the knuckle bearing. The method includes the steps of setting quantities and sizes of accelerated stress levels and the quantity of knuckle bearing samples, arranging the knuckle bearing samples on a knuckle bearing swinging test platform, exerting load to accelerate the stress levels, monitoring wear amount continuously by means of sensors and recording data; processing the data of the wear amount by means of a computer to build an accelerated degradation model and an acceleration model; obtaining the predicted result of service life of the knuckle bearing. The method can truly reflect performance degradation progress of the knuckle bearing in normal use, enables an acceleration test to be carried out at a large acceleration coefficient, shortens test time and reduces test cost.

Description

technical field [0001] The invention belongs to the technical field of acceleration tests of joint bearings, and in particular relates to an acceleration test method for predicting the life time of joint bearings under actual use conditions by monitoring and analyzing wear amount data information of joint bearings under acceleration conditions. Background technique [0002] Joint bearings have the characteristics of simple structure, large load capacity and self-aligning, and are widely used in key parts of weaponry and aerospace. It is subject to complex loads and harsh working environments, and is prone to failure. For example, the joint bearing of the helicopter rotor automatic tilter is in a state of high-frequency action during work, and once it fails, it will directly lead to a catastrophic accident of the helicopter crashing. The life of spherical plain bearings is usually defined as the working time when the amount of wear increases to a certain threshold under norm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/04
Inventor 张春华汪亚顺谭源源陈循罗巍赵元张详坡鲁相万伏彬
Owner NAT UNIV OF DEFENSE TECH
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