Marine engine connection rod bush wear simulation test device and test method

Abstract

The invention relates to a marine engine connection rod bush wear simulation test device comprising a substrate, a vertical guide rail, a piston, a driving device, a connection rod and a loading device; the vertical guide rail is installed on the substrate; the piston is movably installed on the vertical guide rail; the driving device comprises a motor and an eccentric wheel, and the motor drivesthe eccentric wheel to rotate; the big end of the connection rod is hinged to the eccentric wheel via a pin roll, a connection rod bush is embedded into the small end of the connection rod, and a piston pin is inserted into the connection rod bush and in fit cooperation with the connection rod bush; and the loading device comprises an equivalent load hydraulic cylinder for applying a constant loadto the piston and a spring mechanism for applying an impact load to the piston. According to the device and method provided by the invention, the platform simulation tests can be performed on the piston pin-connection rod bush friction pair with the bushes made from different materials and subjected to different surface treatment, so that the wear abrasion characteristics of the bushes made fromthe different materials; and through measuring the track of the axis of the piston pin, the influences of the working condition parameters, structural parameters and technical methods of the simulation engine on the thickness of the oil film on the piston pin-connection rod bush friction pair can be acquired.

Description

technical field [0001] The invention relates to the technical field of marine engine simulation tests, in particular to a marine engine connecting rod bushing wear simulation test device and test method. Background technique [0002] The connecting rod bushing is one of the key parts of the marine engine. It connects the piston and the connecting rod through the piston pin and is used to support the piston pin. During the working process, the connecting rod bushing is affected by the periodically changing gas force and inertial force, and it is difficult to form a sufficient lubricating oil film. The harsh working environment makes the connecting rod bushing prone to wear and tear, resulting in blockage of the oil hole, which in turn leads to vicious accidents. Therefore, it is of great significance to study the friction and wear characteristics of the engine connecting rod bushing, and the test device is a necessary condition for the research of the connecting rod bushing. ...

AI Technical Summary

Problems solved by technology

[0003] Most of the test devices and test methods in the prior art use simple swing motion to simulate the motion state of the piston pin-connecting rod bushing, and only apply pulse loads

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