Alternating load loading device for bearing testing machine, based on screw rod transmission mechanism

Abstract

The invention relates to an alternating load loading device for a bearing testing machine, based on a screw rod transmission mechanism. The bearing testing machine includes a rotating shaft (1), wherein a tested bearing (2) is arranged on the rotating shaft (1). The alternating load loading device includes a clamp (3) and a plurality of rotary motor-screw rod transmission mechanism-spring assemblies surrounding the clamp (3), wherein each rotary motor-screw rod transmission mechanism-spring assembly includes successively connected rotary motor, screw rod transmission mechanism and spring; eachscrew rod transmission mechanism includes a shaft coupling (51), a screw rod bearing (52), a screw-nut (53), a screw rod (54) and a bearing pedestal (55); and the rotary motor drives the screw rod transmission mechanism to move to control the spring to generate stretching or compression deformation and apply alternating load to the tested bearing (2) in the clamp (3). Compared with the prior art,the alternating load loading device for a bearing testing machine has the advantages of being able to realize the real condition load of the internal combustion engine.

Description

technical field [0001] The invention relates to a loading device for a bearing testing machine, in particular to an alternating load loading device for a bearing testing machine based on a screw drive mechanism. 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 frict...

AI Technical Summary

Problems solved by technology

At present, the loading characteristics of the traditional bearing test device are single, and the loading of variable loads cannot be realized. In the real internal combustion engine, the dynamic load bearing is often under alternating load, so it is difficult for the traditional bearing test loading device to realize the alternating load of the dynamic load bearing of the engine. load

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