Analysis And Simulation On Motion Precision Reliability Of Hydraulic Support

Hydraulic support is one of the key equipment in the mechanization method of the coal mining.With the development of the modern coal mining technology, the requirement for the hydraulic support design is more and more high. The thesis research mainly analyzes and simulates the motion precision reliability of the hydraulic support and provides the necessary references and theories of the area in the future.This thesis discusses the calculation method of the motion precision reliability. The theorical model of the continuous contacting motion with two-force bars is put forward and the calculation method of this theorical model reliability is deduced. The theory is verified in theory and in the ADAMS simulating test by designing the verification model.Three representative working positions of the hydraulic support are selected. By analyzing the force case of these positions, it is proving that the hydraulic support mechanism is suitable for the theory of the continuous contacting motion with two-force bars. The motion precision reliability of the hydraulic support is analyzed and calculated by this theory.The dynamic model of the hydraulic support is built in ADAMS/View. Some necessary constraints and drivers are added in this model and the continuous contacting motion of the hinge position containing the gap is simulated by adding the contact force. Some design variables corresponding to the dynamic model features are set up and the model is configured parameterically by the geometrical relations of these features in the model. Designing the generation function of the random variables using the time as the variable is applied to define the random pressure and friction of top beam from bottom board.The design variables are set up by the normal distribution in ADAMS/Insight. The digital characters of the top beam front orbit are obtained by the Monte Carlo experiment method and have little difference with the theory analysis result. It is proved that the theory model is correct. The hydraulic support mechanism is optimized. The motion precision reliability of the optimization mechanism is increased.