Antifriction bearing fatigue life testing device of crank connecting rod drive loading alternating load

Abstract

The invention relates to an antifriction bearing fatigue life testing device of crank connecting rod drive loading alternating load. The antifriction bearing fatigue life testing device of crank connecting rod drive loading alternating load controls rotation of a driving motor through a computer so as to drive an antifriction bearing to operate at the given rotating speed, wherein in a crank connecting rod drive alternating load loading unit, the rotary movement of the rotary motor can be converted into rectilinear motion through a crank connecting rod drive mechanism, thus influencing tension/compression amount of a spring; because of changing of the tension/compression amount of the spring, the spring can apply acting force with different magnitude and changeable direction to the surfaceof a movable clamp; and by adding a plurality of crank connecting rod drive alternating load loading units in different areas of the movable clamp, loading of the bearing alternating load can be realized, and a torquemeter and a temperature sensor can be used for detecting the performance during the operating process of the antifriction bearing. Compared with the prior art, the antifriction bearing fatigue life testing device of crank connecting rod drive loading alternating load can simply and conveniently realize loading the antifriction bearing alternating load, and can perform the antifriction bearing fatigue life test by combining with the real working condition of an internal combustion engine.

Description

technical field [0001] The invention belongs to the field of life testing of engine rolling bearings, and relates to a rolling bearing fatigue life testing device which is driven by a crank connecting rod and loaded with alternating loads. 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 on...

AI Technical Summary

Problems solved by technology

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

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