Journal Article10.1007/S12404-013-0321-2
Dynamic characteristics of the high-flow water three-way valve
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TL;DR: In this paper, the operating principle of water three-way valve with high flow for individual hydraulic prop in coal was presented, its strict and precise mathematical model was established, its flow field was simulated numerically by software Fluent, and its dynamic characteristics were analyzed during the work process such as raising leg, loading and overflow, the influence of related parameters on high-flow water threeway valve was determined.
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Abstract: Operating principle of water three-way valve with high flow for individual hydraulic prop in coal was presented in this paper, its strict and precise mathematical model was established, its flow field was simulated numerically by software Fluent, and its dynamic characteristics were analyzed during the work process such as raising leg, loading and overflow, the influence of the related parameters on high-flow water three-way valve was determined. The results as follows: during the raising leg stage and early raising leg stage, when the damping ratio increases, the overshoot of system decreases and the setting time reduces, and the dynamic response performance has a significant improvement. During the loading stage and the overflow stage, the pressure in plunger chamber of single hydraulic prop, the output flow and the displacement of the high-flow water three-way valve decrease with the decreasing of the external load. The spring stiffness of the safety valve directs the flow and the spool’s displacement of the safety valve, and it can be used to control the high-flow three-way valve’s sensitivity.
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Citations
Modeling and Analysis of Single Hydraulic Props in Coal Mines
TL;DR: In this article, the authors focused on dynamic performance of water hydraulic single hydraulic prop, and the mathematical and AMESim model of single hydraulic Prop was established and the drop hammer was introduced to simulate the impact load of the surrounding rock acting on the prop.
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