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| Influence of pump valve on discharge performance of reciprocating pump |
| LI Bin1*, LI Yi1, GAO Yaning2 |
| 1. School of Mechanical and Electrical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China; 2. Changqing Well Cementing Company, CNPC Chuanqing Drilling Engineering Company Limited, Xi′an, Shaanxi 710018, China |
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Abstract Aiming at the problems of poor discharge performance of reciprocating pump caused by delayed closing lag of the pump valve and the excessive opening resistance of the pump valve, the pump valve of a certain type of reciprocating pump was taken as the research object. The influence of the spring stiffness of the pump valve, the mass of the valve disc and the diameter of the inner hole of the valve seat on the maximum opening residence of the valve, the opening and closing lag angel of the valve, and the discharge flow and pressure of the pump were studied through multi-disciplinary coupling numerical calculation of the mechanical, mechanical and flow field. The accuracy of the numerical calculation method was verified by bench test of reciprocating pump. The research results show that the inner hole diameter of the valve seat has more obvious effects on the maximum opening resis-tance, opening and closing lag angle, the pump discharge flow and discharge pressure are more obvious than the spring stiffness and disc quality. The maximum change value of the opening resistance and opening and closing lag angle caused by the change of valve seat inner hole diameter is 0.684 0 MPa and 28°, respectively. The opening and closing lag angle of valve seat increases with the inner hole diameter of valve seat. The pump discharge flow and discharge pressure decrease with the increase of the inner hole diameter of the valve seat. The maximum change value of the pump discharge flow and discharge pressure caused by the change of the inner hole diameter of the valve seat is 10.558 7 L/min and 0.187 8 MPa, respectively. The research results can provide some reference for optimizing the design of pump valve and improving the discharge performance of reciprocating pump.
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Received: 01 November 2021
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