Clamp for fatigue test suitable for copper-aluminum transition wire clamp

Abstract

The invention relates to a clamp for a fatigue test suitable for a copper-aluminum transition wire clamp. The clamp is used for fatigue test of a copper-aluminum transition clamp including a left side copper splint and a right side threading column, the clamp includes two upper fastening sliding blocks mounted in an upper outer clamp for a fatigue testing machine and two lower fastening sliding blocks mounted in a lower outer clamp for the fatigue testing machine, a plurality of upper bolt holes are manufactured in an outer side inclined planes of the upper and lower fastening sliding blocks, upper and lower fastening bolts are screwed in the upper and lower bolt holes, the upper and lower fastening bolts fix the upper and lower fastening sliding blocks and the upper and lower outer clamps, and semicircular trenches used for tightening the threading column is manufactured in opposite vertical surfaces of the lower fastening sliding block. The clamp provided by the invention is suitable for a fatigue test of a copper-aluminum transition wire clamp, facilitates service performance evaluation, life assessment and material scheme formulation of power grid equipment, and is of great significance to reliable operation and accident prevention of a power grid line.

Description

technical field [0001] The invention belongs to the technical field of electric equipment manufacturing and processing, in particular to a fatigue test fixture suitable for copper-aluminum transition clamps. Background technique [0002] Copper-aluminum transition clamp is a typical copper-aluminum connection device widely used in the power industry. Copper-aluminum transition clamps are used to connect bus down-leads to outlet terminals of electrical equipment such as transformers, circuit breakers, transformers, disconnectors, and through-wall bushings. The common failure mode of copper-aluminum transition clamp is the fatigue fracture of the welded structure. Due to the welding method and operating characteristics of the copper-aluminum equipment clamp, the welding surface directly bears the tensile force, and the welding cross-section is relatively small, so the probability of fracture is relatively high. The main reason for the fracture of the copper-aluminum transiti...

AI Technical Summary

Problems solved by technology

The main reason for the fracture of the copper-aluminum transition equipment line clamp is that there are large welding defects. The fracture mode is that the existence of welding defects causes stress concentration. Under the action of alternating stress (such as intermittent wind swing, etc.), the expansion of welding defects causes fatigue fracture

Images