Tangential final-motion frictional wear test equipment

Abstract

The invention discloses tangential final-motion frictional wear test equipment. The equipment is characterized in that a lateral hydraulic piston connected with a data acquisition and control system is connected with a hinged shaft at the middle upper part of a vertical connecting rod; the upper end of the connecting rod is connected with one side of an upper test piece chuck through a cross bar; the other side of the upper test piece chuck is connected with a tangential displacement sensor fixed on the side wall of an experiment medium cavity; the upper test piece chuck is used for clamping a spherical test piece; a lower test piece chuck for clamping a plane test piece is arranged right below the upper test piece chuck; the lower test piece chuck is fixed at the bottom of the experiment medium cavity; the bottom of the experiment medium cavity is arrange on two longitudinal supporting rods; and a deformation sensor is arranged between the top of the longitudinal supporting rods and the bottom of the experiment medium cavity. The tangential final-motion frictional wear test equipment can effectively simulate the tangential final-motion friction and has the advantages of simple structure and high test precision, is convenient to maintain, can carry out a final-motion frictional test under the medium conditions, such as controllable high temperature, lubrication and liquid, and can provide more accurate and reliable test bases for designing, manufacturing and maintaining relevant parts.

Description

technical field [0001] The invention relates to a device for real-time observation and recording of tangential fretting friction and wear. Background technique [0002] Different from sliding and rolling, fretting refers to the relative motion with extremely small amplitude between contact surfaces under the action of alternating loads such as mechanical vibration, fatigue load, electromagnetic vibration or thermal cycle. These contact surfaces are usually nominally At rest, that is, fretting occurs in mechanical parts that are "tightly" fitted. Due to the vibration caused by machinery, fluid, thermal cycle, etc., fretting wear generally exists in various seemingly static gaps or tight-fitting contact interfaces, and it widely exists in industrial applications. Fretting can cause contact surface wear, cause components to occlude, loosen or form pollution, etc.; it can accelerate the initiation and expansion of cracks, and reduce the fatigue life of parts. Under the conditi...

AI Technical Summary

Problems solved by technology

But its frequency is low, and it is difficult to change, it is difficult to realize small amplitude movement, and the precision is poor

[0004] 2. Electromagnetic type: the biggest advantage is the wide frequency band, which can simulate high-frequency vibration, and the volume of the test equipment is also small; but it has the disadvantages of low excitation force and displacement amplitude

But its structure is complicated, bulky, and maintenance cost is high

[0006] Moreover, none of the above tangential fretting test equipment can be tested in a controllable high temperature and liquid medium environment. , Tangential fretting wear under liquid medium provides a good experimental basis

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