GIS device corrugated pipe fatigue damage test device

Abstract

The invention discloses a GIS device corrugated pipe fatigue damage test device. In the operation process of a corrugated pipe on a GIS device, the stress strain of the corrugated pipe changes along with the change of the temperature difference all the year round, and within one day, the stress strain conditions in the daytime and at night are completely different. According to the invention, twoservo motors provide the driving force, two sets of slider-crank mechanisms are formed by the components, such as a turntable, a connecting rod, a dragging plate, etc., so that the periodic reciprocating motion of the dragging plate is realized. The two sets of slider-crank mechanisms can respectively or simultaneously simulate the corrugated pipe deformation of the GIS device due to the temperature change within one day and four seasons of the year, and the corrugated pipe stress can be measured through a sensor, so that a corrugated pipe fatigue damage mechanism is researched, and the fatigue life of the corrugated pipe is predicted. The GIS device corrugated pipe fatigue damage test device is simple in structure, is safe to operate, is capable of achieving tests of various samples, suchas corrugated pipes, springs, etc., is lower in cost and is easy to popularize.

Description

technical field [0001] The invention relates to the technical field of power equipment fatigue testing, in particular to a GIS equipment bellows fatigue damage testing device. Background technique [0002] In the gas-insulated metal-enclosed switchgear GIS equipment, the metal bellows expansion joint is an important part used to connect two pipeline buses, mainly used to compensate the size change of the pipeline bus caused by thermal expansion and contraction, and absorb axial vibration during operation The energy generated and the space size of the pipeline bus are adjusted, etc., and its effect is similar to that of a spring. Therefore, the metal bellows expansion joint is a key component in the application of GIS electrical equipment to ensure the safety and health of the equipment. [0003] The general composition of metal bellows expansion joints for GIS equipment is as follows: bellows, connecting pipes, backing rings, flanges, studs, nuts and other components, among...

AI Technical Summary

Problems solved by technology

Most manufacturers use austenitic stainless steel when making metal bellows. Metal bellows will be subjected to cyclic loads in actual working conditions, but the stress on each part of it is not uniform, and the stress in some local areas will be relatively concentrated. It is often in the plastic stress zone, so fatigue damage is likely to occur at a lower cycle number, which is a typical low-cycle fatigue component

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