Abstract
The transmission mechanism, of which the dynamic characteristics determine the reliability of the circuit breaker, is the principal component of the ultrahigh voltage (UHV) circuit breaker. The characteristics of transmission mechanism are quick motion, high sensibility, and high reliability. The transmission mechanism with multiclearance joints present strong no-linear vibration feature which strongly affects the reliability of the UHV circuit breaker. In this investigation, a planar rigid-flexible coupling model of the transmission mechanism considering the clearance joints and the flexibility of components is established by using ADAMS software. The dynamic contact model in clearance joints is performed, based on clearance vector model of clearance joint. Then, the reliability of the model is proved by means of comparing the results of experiments. The simulation results show that the dynamic response of the mechanism is greatly influenced by the clearance and the flexibility of components has a role of suspension for the mechanism. Moreover, the influence of the clearance size, input speed, and number of clearance joints on the dynamic characteristics of the mechanism are also investigated.
Highlights
The ultrahigh voltage (UHV) circuit breaker is a device for protecting and controlling UHV transmission and distribution network
Megahed and Haroun established a model for a slider-crank mechanism considering multiple clearance joints, which was incorporated into ADAMS for conducting the dynamic simulation [16]
In order to study the dynamic characteristics of transmission mechanism with multiclearance joints, the STEP5 function in ADAMS is selected as input function of motion
Summary
The ultrahigh voltage (UHV) circuit breaker is a device for protecting and controlling UHV transmission and distribution network. Khemili and Romdhane were interested in the study of the dynamic behavior of a planar flexible slider-crank mechanism with clearance; simulation and experimental tests were carried out for this goal [14]. Megahed and Haroun established a model for a slider-crank mechanism considering multiple clearance joints, which was incorporated into ADAMS for conducting the dynamic simulation [16]. A planar rigid-flexible coupling dynamic model of high speed multilink transmission mechanisms with clearance for ultrahigh voltage circuit breaker (1100 kv) is proposed using ADAMS software, based on the nonlinear continuous contact theory and the modified Coulomb friction model.
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