Rolling bearing fatigue life testing system for loading radial alternating load by lead screw drive

Abstract

The invention relates to a rolling bearing fatigue life testing system for loading a radial alternating load by lead screw drive. According to the system, a computer is used for controlling rotation of a driving motor to drive a rolling bearing to make rotation. The rotation motion of a rotary motor is transformed into a linear motion by a lead screw transmission mechanism in a lead screw transmission radial alternating load loading unit, so that the stretching / compression amount of the spring is affected; and because of changing of the stretching / compression amount of the spring, the spring is able to apply acting forces with different degrees and changeable directions at a movable clamp. Loading of the radial alternating load of the bearing is realized by adding a plurality of lead screwtransmission radial alternating load loading units in different areas of the moving clamp. A torquemeter and a temperature sensor are used for detecting performances of the rolling bearing in operation. Compared with the prior art, the testing system has the following beneficial effects: loading of the radial alternating load of the rolling bearing can be realized simply, conveniently and accurately; and the fatigue life testing of the rolling bearing is carried out by combining the real working condition of the 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 driven by a lead screw. 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 fr...

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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