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Rubber and plastic shaft seal life prediction method and system based on finite element wear degradation analysis

A life prediction, rubber and plastic technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of high cost and low accuracy

Active Publication Date: 2019-11-22
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a rubber and plastic shaft seal life prediction method and system based on finite element wear degradation analysis to solve the problems of low accuracy and high cost of existing rubber and plastic shaft seal life prediction methods

Method used

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  • Rubber and plastic shaft seal life prediction method and system based on finite element wear degradation analysis
  • Rubber and plastic shaft seal life prediction method and system based on finite element wear degradation analysis
  • Rubber and plastic shaft seal life prediction method and system based on finite element wear degradation analysis

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Embodiment

[0184] In the embodiment of the present invention, a three-dimensional modeling of a certain type of rubber and plastic shaft seal is carried out, and the appearance of the three-dimensional model is as follows Figure 8 shown. At the same time, the two-dimensional profile of the actual surface was measured by a roughness profiler. The two-dimensional profile curve is as follows: Figure 9 As shown, the abscissa is the axial sampling length, and the ordinate is the height of the two-dimensional profile. And based on previous tests and expert experience, the relevant failure thresholds of friction torque and pumping rate under specific working conditions were obtained. The working conditions and failure thresholds are shown in Table 1:

[0185] Table 1 Test profile and failure threshold under this profile

[0186]

[0187]

[0188] According to the method of the present invention, the simulation time step is set to be 1 hour, and finally the degradation curve of its p...

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Abstract

The invention discloses a rubber and plastic shaft seal life prediction method and system based on finite element wear degradation analysis. According to the method, a finite element method is adoptedfor physical modeling of wear degradation to obtain a two-dimensional model of the sealing lip of the rubber and plastic shaft seal; transient performance parameters are obtained through simulation according to the two-dimensional model and the three-dimensional morphology of the sealing lip of the rubber and plastic shaft seal; the friction torque and the swabbing rate serve as failure judgmentconditions of the rubber and plastic shaft seal, simulation iteration is stopped when the friction torque or the swabbing rate reaches a failure threshold value, the theoretical service life of the rubber and plastic shaft seal is obtained through calculation according to the simulation time step length and the current simulation frequency, and the prediction accuracy of the service life of the rubber and plastic shaft seal is improved; moreover, the method does not need an accelerated life test, saves a large amount of manpower and material resources, and reduces the prediction cost of the service life of the rubber-plastic shaft seal.

Description

technical field [0001] The invention relates to the technical field of rubber and plastic shaft seals, in particular to a method and system for predicting the life of rubber and plastic shaft seals based on finite element wear degradation analysis. Background technique [0002] Rubber and plastic shaft seals are also called oil seals. They are mainly composed of metal skeleton, fastening spring and sealing lip. As a common dynamic seal, they are widely used in gear pumps and fuel pumps. Its main features are simple structure, low price and long life. Under working conditions, the failure modes of rubber and plastic shaft seals include: material aging and hardening, spring failure and lip friction and wear. The most important failure mechanism is the friction and wear degradation of the sealing lip. The failure of the rubber and plastic shaft seal directly leads to a large amount of oil leakage, which will not only pollute the environment in the working chamber, but more ser...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 张超王少萍陈启航刘迪
Owner BEIHANG UNIV
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