Frictional wear simulation test bench of wobble friction pair

Abstract

The present invention relates to a frictional wear simulation test bench of a wobble friction pair, which is mainly composed of the following components: a frame workbench, a main shaft drive unit, a friction pair simulation swing mechanism, a hydraulic loading device, a hydraulic control system and a PC control system. The PC control system of the simulation test bench collects the signals of a torque sensor, a pressure sensor and a rotating speed sensor; and can realize the following functions: controlling an amplitude and a frequency of a loading force; operating and controlling a test program; collecting, processing and storing data; displaying and printing test data and a test curve. The frictional wear test follows a system correlation principle, a principle that the temperature fields are similar, a limit principle, a principle that the wear mechanisms are same, and a wear test simulation determination standard. A practical wobble friction pair is used as a test object. The frictional wear simulation test bench of the wobble friction pair has the following characteristics: compact structure, adjustable load amplitude, adjustable rotating speed, adjustable loading frequency, capability of simulating different working conditions of an engine, and capability for measuring the frictional wear characteristics of different types of wobble friction pairs.

Description

technical field [0001] The invention belongs to the technical field of test equipment, and in particular relates to a friction and wear test bench for a sliding bearing and a shaft of an oscillating friction pair of a piston engine. technical background [0002] The friction and wear test of engine swing friction pair is usually divided into general sample test, bench test and friction pair simulation test. [0003] The general sample test is mainly used to study the friction and wear mechanism, general laws and relative wear resistance of materials. Due to the ideal test conditions, the results of this test are difficult to be directly used in a specific occasion, but the cycle is short and the conditions are easy. Good control, data repeatability and comparability. It is widely used in the experimental research of material selection and surface treatment process. The bench test is carried out under conditions closer to the actual working conditions of the friction pair, ...

AI Technical Summary

Problems solved by technology

Mechanical loading can be divided into lever loading, spring loading and direct loading of heavy objects or a combination of the above three loading forms. The structure of lever loading and direct loading of heavy objects is simple, the load is stable, there is no problem of load retention, and the loading accuracy High, but when the motion of the friction pair is unstable, it will cause vibration and shock; the vibration generated by spring loading is relatively small, but the accuracy of spring loading is not high, and it is difficult to achieve precise load adjustment

Hydraulic loading includes dynamic pressure loading and static pressure loading. Hydraulic loading is difficult to keep the load stable

Electromagnetic loading is easy to realize the automatic control of the load, but its weakness is that the cost of the control part is relatively high, and it is rarely used on the existing friction and wear testing machine

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