High-frequency high-specific pressure long-stroke temperature-controllable reciprocating friction test device

Abstract

The invention discloses a high-frequency high-specific pressure long-stroke temperature-controllable reciprocating friction test device. The high-frequency high-specific pressure long-stroke temperature-controllable reciprocating friction test device is characterized in that a tested unit comprises an upper test piece and a lower test piece which are arranged in a splitting way, wherein the lower test piece is supported on a roll ball; the upper test piece and a pressure transmitting piece are arranged in a reverse T shape; a mating test piece positioned between the upper test piece and the lower test piece is in surface contact with the upper test piece and the lower test piece; a reciprocating motion driving unit is a crank-slider mechanism driven by a motor; a loading unit is a loading lever capable of carrying out multilevel incremental loading; and a friction coefficient measuring unit is a force sensor taking the lower test piece as a tested piece. In the invention, the reciprocating motion frequency can reach 40 Hz, the reciprocating motion stroke can reach 115 millimeters and the contact surface specific pressure can reach 40 MPa; the measurement of the friction coefficients and the real-time temperature of parts can be realized; and the ultimate loads of the parts can be measured.

Description

technical field [0001] The invention relates to a friction testing device, in particular to a friction testing device capable of high frequency and large stroke reciprocating motion under the condition of high specific pressure environment and high temperature. Background technique [0002] In engineering practice, because the reciprocating parts are moving at variable speeds, the friction between the surfaces of the two parts in contact with each other is very complicated. For the design and research of the reciprocating friction and wear test device, many research and design personnel at home and abroad have obtained a lot of research. results and applied them to experimental research. As early as 1989, S.M.H.Benabdallaha et al. (S.M.H.Benabdallaha. Reciprocating sliding friction and wear test apparatus. Department of Mechanical Engineering, Ecole Polytechnique de Montréal, PO Box 6079, Station'A', Montreal, Quebec, Canada, H3C 3A7) proposed a A plane-plane contact slidin...

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Problems solved by technology

In 2009, Yuan Mingchao et al. (Yuan Mingchao; Qian Shuangqing; Liu Yijing; Wang Xiaolei. Experimental research on improving the friction performance of piston ring / cylinder liner by using surface texture. Mechanical Science and Technology, 2009, (12), 1630-1633+1638) designed The reciprocating testing machine is also aimed at the research of the cylinder liner-piston ring friction pair, it cannot be temperature controlled, and there are no other publicly realized parameters

In 2010, the reciprocating testing machine designed by Yu Jianwei et al. The frequency of reciprocating motion is 0.2~2Hz, and the maximum stroke is 40mm; Liu Yongping (Liu Yongping; Gong Jun; Xin Zhou; Hou Yunfeng. Design of reciprocating friction and wear testing machine and its computer control system. Journal of Instrumentation, 2010, (08), 1750 -1755) designed reciprocating testing machine can not measure temperature, its temperature control device and stroke realization parameters are not seen

Based on the design and research of the current reciprocating friction and wear test device, whether it is a public paper or a patent, the conditions for reciprocating friction and wear testing that can be realized are limited, either the reciprocating stroke is relatively small, or the reciprocating frequency is relatively low, or the specific pressure of the contact surface is relatively small. Little or no temperature control

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