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1 Journal of Theoretical and Applied Mechanics

1 2020

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Dynamic characteristics study on the two-stage safety valve used on hydraulic support under impact loading

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Zhao G. , Wang H. , Song Y. , Zhang C.

Journal of Theoretical and Applied Mechanics

2020

tom Vol. 58 nr 3

623--635

A two-stage linkage safety valve for hydraulic support is presented. Considering the hydraulic support is impacted, dynamic simulation of the column circuit with the two-stage safety valve subject impact loading was carried out, and the dynamic characteristics of the two- -stage safety valve with different impact forms were studied. A rapid impact loading test rig was built to test the two-stage safety valve sample under impact loading. Simulation and experimental results indicate that the two-stage safety valve has high sensitivity and good unloading performance, it can realize fast and large flow unloading of the hydraulic support under different impact forms and pressures.