Research on Mechanical Fatigue Test Methods for Cylinder Liner Components
The paper provides a general idea and method for mechanical fatigue test design of cylinder liner,which can consider the effects of gas pressure and piston lateral force on cylinder liner fatigue life.At the same time,taking a certain engine as the research object,firstly,based on the dynamics and kinematics calculation of the crank connecting rod mechanism,the crankshaft rotation time corresponding to the maximum gas force and the maximum lateral force of the original engine under the working state and the corre-sponding piston displacement are obtained,which is used as the load and displacement constraint boundary of the cylinder liner during the mechanical fatigue test.Secondly,the key structural parameters in the fatigue test of components are designed according to the load and displacement constraints.Finally,the lateral force is calibrated through the test scheme,and the correctness of lateral force loading is proved.On this basis,10 million times of cylinder liner component fatigue test is completed.Through penetration inspection,there is no crack in the cylinder liner,indicating that it meets the reliability design requirements.
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维普
