A Method for Optimal Arrangement of the Crank Initial Phase Angle on the Crankshaft of a Seven-Cylinder Reciprocating Pump

Abstract

The invention relates to an optimized layout method, in particular to an optimized layout method of an initial phase angle of a crank of a bent shaft of a seven-cylinder reciprocating pump. According to the method, the motion law of a single-cylinder single-action reciprocating pump column plunger is analyzed to find out corresponding relations between each motion parameter and the crank angle; by adopting a non-dimensional idea, the optimized design method of the layout scheme of the initial phase angle of the crank of the seven-cylinder reciprocating pump on the basis of flow fluctuation, flow cutoff time and the bending moment of the bent shaft is disclosed. According to the bending moment of the bend shaft, four optimal schemes are obtained to make the flow cutoff time, the flow fluctuation and the bending moment of the bent shaft all achieve optimal results, and therefore the inertia of hydraulic head is reduced, desilting phenomena in pipelines are decreased, the bending moment of the bent shaft is reduced, the service life of the seven-cylinder pump is prolonged, the working reliability of the seven-cylinder pump is improved, and a foundation is laid for researches in other aspects of the seven-cylinder reciprocating pump.

Description

technical field [0001] The invention relates to an optimized arrangement method, in particular to an optimized arrangement method for the crank initial phase angle on the crankshaft of a seven-cylinder reciprocating pump. Background technique [0002] The reciprocating pump has the advantages of simple structure, high efficiency, high discharge pressure and stable displacement, and can achieve constant displacement, and has been widely used in more and more industries. In order to meet the requirements of high power, large displacement and high pump pressure of reciprocating pumps in the future, reciprocating pumps are gradually developing towards multi-cylinders. Compared with the five-cylinder pump, the seven-cylinder pump can provide higher pressure, power and displacement, and the flow fluctuation and pressure pulsation amplitude are smaller, but there are still sand and cavitation phenomena in the suction and discharge process, flow fluctuation, Problems such as vibrat...

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Problems solved by technology

[0004] However, the initial phase angle layout scheme of the reciprocating pump crank has a great influence on the flow fluctuation of the suction pipe, the vibration of the whole machine, the inertial head loss and the force on the crankshaft, and the working performance of the reciprocating pump varies greatly with different layout schemes.

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