Rolling bearing fatigue life testing device capable of loading alternating load

Abstract

The invention relates to a rolling bearing fatigue life testing device capable of loading an alternating load, and the device controls the rotation of a drive motor through a computer, and drives a rolling bearing to rotate at a given speed. In an alternating load loading unit, the tension / compression quantity of a spring is affected through the displacement of a linear motor. Because of the changes of the tension / compression quantity of the spring, the spring can apply different acting forces in variable directions to the surface of a movable clamping tool. A plurality of alternating load loading units are added in different regions of the movable clamping tool, thereby achieving the loading of the alternating load. A torque meter and a temperature sensor can be used for detecting the performances of the rolling bearing in an operation process. Compared with the prior art, the device can achieve the loading of the alternating load of the rolling bearing simply and conveniently, and performs the fatigue life testing of the rolling bearing through combining with the actual working conditions of the internal combustion engine. The device is simple in structure, saves the space, and is more precise and direct in control.

Description

technical field [0001] The invention belongs to the field of engine rolling bearing life test and relates to a rolling bearing fatigue life test device capable of loading 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 one of the most critical friction pairs of the inter...

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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