Dynamic characteristics study on the two-stage safety valve used on hydraulic support under impact loading
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Liaoning Technical University, School of Mechanical Engineering, Fuxin, China
Yingkou Institute of Technology, Department of Mechanical and Power Engineering, Yingkou, China
Submission date: 2019-08-09
Final revision date: 2019-10-18
Acceptance date: 2019-11-04
Online publication date: 2020-07-15
Publication date: 2020-07-15
Journal of Theoretical and Applied Mechanics 2020;58(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.
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