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International Standard Serial Number:
ISSN 1001-4551
Sponsor:
Zhejiang University;
Zhejiang Machinery and Electrical Group
Edited by:
Editorial of Journal of Mechanical & Electrical Engineering
Chief Editor:
ZHAO Qun
Vice Chief Editor:
TANG ren-zhong,
LUO Xiang-yang
Tel:
86-571-87041360,87239525
Fax:
86-571-87239571
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No.9 Gaoguannong,Daxue Road,Hangzhou,China
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310009
E-mail:
meem_contribute@163.com
Abstract: Aiming at the problems of high stroke rate, short stroke and crankshaft failure of traditional mechanical fracturing pump, a new type of hydraulic fracturing pump driven by multi-cylinder combined flow was proposed and the mechanism of its flow pulsation was studied. Firstly, the working principle of multi-cylinder combined flow fracturing pump was described in detail. And the mathematical model of the multi-cylinder combined flow fracturing pump was established and analyzed by using the theory of hydraulic fluid mechanics. Then, the simulation model of the multi-cylinder combined flow fracturing pump was built by AMESim. In addition, a reasonable simulation parameter setting was selected to carry out simulation research under variable load pressure. Finally, the piston-plunger movement characteristics, pump chamber flow characteristics, output flow and pressure pulsation characteristics in the hydraulic power transmission chain were studied, and the simulation results were analyzed. The research results show that under the condition of 25 MPa, the output pressure and flow pulsation rate of multi-cylinder combined flow fracturing pump are respectively 36.8% and 20.61%, and the stroke times are only 42 times /min, which accord with the actual working condition. The main reasons for the output flow pulsation of the multi-cylinder combined flow fracturing pump are the frequent reversal of each cylinder, the switch of pumping stroke and suction stroke, which lead to the deceleration stop motion and acceleration start motion of the piston and plunger.
Key words: reciprocating pump; simulation model; pressure pulsation characteristics; vibration noise; pistonplunger motion characteristics; flow characteristics of pump cavity; output flow
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