Testing system suitable for axle type part fatigue life testing in circuit breaker

Abstract

The invention discloses a testing system suitable for axle type part fatigue life testing in a circuit breaker. The testing system comprises a load source, a testing punch, a part fixture, a force sensor, an independent guide column, energy storage pressure springs, a testing structure frame and a control electric box, wherein the load source is used for providing constant displacement; the forcesensor is used for detecting a load value borne by a tested axle type part; the control electric box is used for controlling the movement of the load source; the testing punch is clamped on the load source; the tested axle type part is fixed on the part fixture; the testing punch is arranged above the axle type part; the lower part of the axle type part is connected with the independent guide column through the force sensor; the energy storage pressure springs are independent in the independent guide column; and the part fixture, the force sensor, the independent guide column and the energy storage pressure springs are spaced in the testing structure frame. By use of the system, a certain independent axle type part in the circuit breaker can be subjected to the fatigue life testing, and aconstant load which approaches to a real working condition is provided for the target part in a certain period.

Description

technical field [0001] The invention relates to a test system for testing the fatigue life of shaft parts in a circuit breaker. Background technique [0002] Circuit breakers are widely used in industrial control systems. In order to ensure the long-term and reliable operation of control circuits, it is very important to study the mechanical reliability of circuit breakers. In order to improve the mechanical reliability of the circuit breaker, it is necessary to fully understand the fatigue life of the key shaft parts inside the circuit breaker during the design process. At present, in the research and development process of the circuit breaker, the fatigue life of the shaft parts in the circuit breaker is mainly tested by the following two methods: (1) The mechanical life test of the whole machine is carried out through the trial prototype to obtain the fatigue life of the target shaft parts ; (2) Use a universal material testing machine to conduct fatigue life tests on in...

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Problems solved by technology

Among them, the cost of method (1) is relatively expensive, and the test preparation period is long; the load loading method of method (2) is too different from the real working conditions of shaft parts in circuit breakers, and it is only suitable for shafts with relatively simple structures. Parts, the price and maintenance cost of the universal material testing machine are relatively high

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