Apparatus for high-temperature creep test and stress relaxation test of rubber elastomer

Abstract

The invention relates to an apparatus for a high-temperature creep test and a stress relaxation test of a rubber elastomer. A stress loading part is positioned right above a temperature control part; a clamp comprises an upper pressing plate and a lower pressing plate which correspond to each other in the vertical direction, wherein the upper pressing plate is horizontally suspended in a high-temperature test box by virtue of a connecting rod, and the lower pressing plate is movably installed in the high-temperature test box; an upper crossbeam is positioned above a lower crossbeam; two ends of the upper crossbeam are fixed on a side plate, and two ends of the lower crossbeam are fixed on the side plate by virtue of a slide apparatus which can slide up and down along the side plate and can be positioned; a straight shaft vertically penetrates through the upper crossbeam, the upper end of the straight shaft is fixedly provided with a weight disc, and the lower end of the straight shaft pushes against the upper surface of the lower crossbeam; a pressure sensor is connected with a connecting rod penetrating through the top of the high-temperature test box; a displacement sensor is fixed on the side plate; and a drive part comprises a ball screw pair consisting of a ball screw and a bearing, the bearing is installed on a base, the ball screw is engaged with the bearing, and the ball screw is detachably connected with the lower crossbeam by virtue of a fixed bracket.

Description

technical field

[0001] The invention relates to a device for high temperature creep test and stress relaxation test of rubber elastic body. Background technique

[0002] Rubber seals, especially O-rings, are widely used in aerospace, petroleum, chemical, machinery and other industrial production and daily life fields due to their high elasticity, oil resistance, corrosion resistance, and wear resistance. However, during the use of rubber seals, if they are subjected to temperature and load for a long time, the sealing performance will gradually decrease or even the seal will fail. Most of the reasons depend on the changes in the properties of the rubber material itself. As an important performance index of rubber, the viscoelasticity of rubber is also an important parameter to measure the sealing performance of rubber seals. Therefore, the research on the performance of rubber seals under actual working conditions The viscoelastic behavior can better ensure the sealing perf...

Images