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Oil seal reliability verification method

A verification method and reliability technology, applied in strength characteristics, test wear resistance, measuring devices, etc., can solve problems such as inability to conduct reliability tests, achieve the effect of reducing test time and improving verification efficiency

Pending Publication Date: 2021-10-08
CHONGQING CHANGAN AUTOMOBILE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the oil seal used in the reducer, most of the service life is required to exceed ten years. If the verification working condition is not accelerated and strengthened, the reliability test cannot be carried out

Method used

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  • Oil seal reliability verification method
  • Oil seal reliability verification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1, a method for verifying the reliability of an oil seal, which includes the following steps:

[0030] S1, fix the clamp of the oil seal to be tested on the test bench, and the lip of the oil seal to be tested is in interference fit with the rotating shaft on the test bench.

[0031] S2. Carry out the wear test under the set test condition, the set test condition is that the working temperature of the oil seal to be tested is 150°C. From the wear formula of the oil seal, the slip distance S and the yield strength σ of the material can be obtained s (T) is directly proportional, the actual operating temperature of the oil seal is T1, and the test temperature is increased to T2, then the yield strength of the oil seal material is changed from σ s1 reduced to σ s2 , the test time can be shortened to the original σ while keeping the wear amount ΔV constant s2 / σ s1 , so that the reliability condition has been strengthened and accelerated.

[0032] The materi...

Embodiment 2

[0033] Embodiment 2, a method for verifying the reliability of an oil seal, which includes the following steps:

[0034] S1, fix the clamp of the oil seal to be tested on the test bench, and the lip of the oil seal to be tested is in interference fit with the rotating shaft on the test bench.

[0035] S2. Carry out the wear test under the set test condition, the set test condition is that the spring stiffness of the oil seal to be tested is twice the spring stiffness of the oil seal used in the actual vehicle. From the wear formula of the oil seal, it can be concluded that the sliding distance S is inversely proportional to the stiffness K of the oil seal spring. By changing the stiffness of the oil seal spring through the test tool, it is also possible to reduce the moving distance year-on-year while keeping the wear amount ΔV unchanged. The purpose is to further reduce the time of reliability verification and improve the verification efficiency.

[0036] The springs of oil ...

Embodiment 3

[0037] Embodiment 3, a method for verifying the reliability of an oil seal, which includes the following steps:

[0038] S1, fix the clamp of the oil seal to be tested on the test bench, and the lip of the oil seal to be tested is in interference fit with the rotating shaft on the test bench.

[0039] S2, the wear test is carried out under the set test conditions. The set test conditions are that the initial radial compression of the oil seal to be tested is 3.5mm. In order to prevent oil leakage, the oil seal is in a compressed state after mating with the rotating shaft. The initial radial compression is designed to be 1.5mm. From the wear formula of the oil seal, the slip distance S and the initial radial compression h of the oil seal can be obtained 0 Inversely proportional, increasing the initial radial compression of the oil seal by increasing the diameter of the shaft in contact with the oil seal can also achieve the purpose of reducing the moving distance year-on-year w...

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Abstract

The invention discloses an oil seal reliability verification method, and the method comprises the following steps: S1, enabling a oil seal to be tested to be clamped and fixed on a test bench, and enabling a lip of the oil seal to be tested to be in interference fit with a rotating shaft on the test bench; and S2, carrying out a wear test under set test conditions, wherein the set test conditions are at least one of that the working temperature of the oil seal to be tested > the average working temperature of the oil seal under the actual use working condition, the spring stiffness of the oil seal to be tested > the spring stiffness of the oil seal used by an actual vehicle, and the initial radial compression amount of the oil seal to be tested > 1.5 mm. The oil seal reliability verification efficiency can be improved, and the feasibility of oil seal reliability verification is improved.

Description

technical field [0001] The invention relates to the field of sealing structures, in particular to a method for verifying the reliability of an oil seal. Background technique [0002] As an important part of the vehicle power transmission system, the reducer is connected with the input and output components through the rotating shaft. In order to ensure that the gear structure in the reducer is effectively lubricated and at the same time prevent the lubricating oil in the reducer from leaking, it is necessary to ensure that the input and output shafts of the reducer are well sealed. As a common part of the reducer seal, the oil seal has the characteristics of simple structure, good sealing performance, and convenient installation. It can effectively isolate the rotating parts that need to be lubricated from the outside world. [0003] The oil seal prevents the internal oil from flowing out through the interference fit between the lip and the rotating shaft and the tightening...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/56G01N3/02
CPCG01N3/56G01N3/02G01N2203/0676
Inventor 彭钱磊陈富杜长虹范旭红邓承浩周安健
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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