Research of wear behavior of discontinuous contact floating ball seal structure based on modified Archard wear model
In order to solve the problem of discontinuous contact wear,the floating ball seal structure in the floating ball valve was taken as the research object,and the Euler-Lagrange coupling method(CEL),the global network reconstruction method(ALE),and the modified Archard model were combined with the numerical computation model to realize the wear simulation analysis of the discontinuous contact seal structure using the Abaqus subroutine UMESHMOTION,investigate the influence law of fluid medium pressure,opening and closing speeds and sealing face widths on the wear characteristics of sealing faces,and reveal the wear mechanism under discontinuous contact conditions.An evaluation method for the mean value of global wear on the contact surface of the seal structure was proposed.The study results show that in the form of discontinuous contact,stress concentrations occur at locations of high wear.Opening and closing speeds and sealing face widths have less influence on sealing face wear.GWA is smallest when Voc is 2 mm/s.GWA is smallest when bm is 3.0 mm.Change in the fluid medium pressure has a greater effect on sealing face wear.The wear mechanism of discontinuous contact seal structure is mainly based on abrasive wear and fatigue wear.The results of the study can provide theoretical basis and technical support for the optimal design of discontinuous contact seal structures.
Archard theoretical modeldiscontinuous contactfloat ball seal structurewear characteristicsCEL methodALE method
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