Automatic loading device of stress ring

Abstract

The invention relates to an automatic loading device of a stress ring for a hydrogen sulfide resistant stress corrosion test, belonging to the technical field of mechanical tests. The automatic loading device comprises a stand, a transmission pressurization mechanism and a stress ring positioning board, wherein the stress ring positioning board is horizontally arranged at the bottom of the stand, and the transmission pressurization mechanism is positioned in the stand and is vertically arranged above the stress ring positioning board. The transmission pressurization mechanism comprises a stepping motor, a synchronous belt transmission mechanism, a vertical driving mechanism and a connection pressurization mechanism, wherein the stepping motor is fixedly arranged at the upper part of the stand and is connected with one end of the synchronous belt transmission mechanism; the other end of the synchronous belt transmission mechanism is connected with the vertical driving mechanism; the vertical driving mechanism is rotatablely arranged at the upper part of the stand vertically; and the connection pressurization mechanism is fixedly arranged at the lower end of the vertical driving mechanism and is in contact with the stress ring to be measured. The invention realizes the purpose of loading the load of which the loading force is 0.1-40KN through a compact structure.

Description

technical field [0001] The invention relates to a device in the technical field of mechanical testing, in particular to a stress ring automatic loading device for hydrogen sulfide stress corrosion resistance testing. Background technique [0002] Hydrogen sulfide has a great corrosion and destructive effect on engineering materials such as steel, especially under stress conditions. In order to improve the hydrogen sulfide stress corrosion resistance of the material, it is necessary to carry out the hydrogen sulfide stress corrosion resistance test in order to study the factors affecting the test results in the preparation process of the specimen, such as dimensional accuracy and surface roughness. The hydrogen sulfide stress corrosion resistance test adopts the method in the American standard NACE0177-2005 (i.e. acid solution immersion method). The first problem that needs to be solved when using this method is how to carry out pressure loading on the stress ring, and use th...

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Problems solved by technology

Since the actual pressure on the stress ring is indirectly measured by detecting the displacement, there are errors in the middle, so the existing technology has the characteristics of limited precision and limited real-time performance, and the actual loading pressure of the stress ring cannot be read online in real time, and it needs Tensile testing machine, higher cost

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