System for testing fatigue life of rolling bearing by loading radial alternating load through conveying belt

Abstract

The invention relates to a system for testing the fatigue life of a rolling bearing by loading a radial alternating load through a conveying belt. According to the system, the rotation of a driving motor is controlled by virtue of a computer, the rolling bearing is driven to rotate at a given rotation speed, and the rotation motion of a rotating motor is converted into a linear motion by virtue ofa conveying belt transmission mechanism in a conveying belt transmission radial alternating load loading unit, so that the stretching / compression amount of a spring can be influenced; by virtue of the change of the stretching / compression amount of the spring, different sizes of action forces in variable directions can be applied to the surface of a movable clamp, and the alternating load of the bearing can be loaded by increasing a plurality of conveying belt transmission radial alternating load loading units in different regions of the movable clamp; and a torquemeter and a temperature sensor are used for detecting the performance appearance of the rolling bearing in the rotation process of the rolling bearing. Compared with the prior art, the system has the advantages that the loading of the radial alternating load of the rolling bearing can be accurately realized, and the fatigue life test for the rolling bearing can be carried out by combining with real working conditions of internal combustion engine.

Description

technical field [0001] The invention belongs to the field of engine rolling bearing life tests, and relates to a rolling bearing fatigue life test system loaded with radial alternating loads on a conveyor belt. Background technique [0002] Internal combustion engines are widely used in automobiles, ships, airplanes, tanks, railway locomotives, agricultural machinery, construction machinery, generator sets and other industries. As power equipment, they occupy a very important position in the national economy. The internal combustion engine includes several important friction pairs such as piston-cylinder liner, piston ring-cylinder liner, crankshaft-bearing and cam-tappet. Among them, the crankshaft bearing, including the main bearing and the connecting rod bearing (due to the working load of this type of bearing The size and direction of the internal combustion engine change with time, so it is usually called a dynamic load bearing), which is one of the most critical fricti...

AI Technical Summary

Problems solved by technology

At present, the traditional rolling bearing test system has single loading characteristics and cannot realize variable load loading. In real internal combustion engines, dynamic rolling bearings are often under alternating loads. Therefore, it is difficult for the traditional rolling bearing test system to carry out the fatigue life test of engine dynamic rolling bearings.

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