In response to the technical requirements for on-demand liquid supply and on-demand pressure supply put forward by engineering practice for large-flow emulsion pumps,and combined with its structural characteristics as a multi-plunger valve flow-distribution reciprocating positive displacement pump,it is proposed to use a moving magnet electromagnet to push the inlet valve of this type of pump to delay closing during the liquid discharge stroke,and then use the plunger movement to re-press the hydraulic medium that had originally entered the plunger chamber back to the inlet manifold,thereby finally realizing the digital technical transformation of the flow distribution process of the pump outlet flow control plan.Based on the equivalent magnetic circuit analysis of the moving magnet electromagnet,dynamic and static simulation experiments were carried out.The experimental results show that the output force of the moving magnetic proportional electromagnet proposed in this paper is stable and has high linearity.When the current density is 11 A/mm2,the output force can reach 154 N,and the maximum stroke can be reached in only 12 ms,which can meet the requirements of digitalization of the flow distribution process of large-flow emulsion pumps.The research results of this paper can provide technical support for intelligent coal mining and intelligent liquid supply theory oriented to the action process of hydraulic supports.
关键词
乳化液泵/动磁式电磁铁/配流阀/数字配流
Key words
emulsion pump/moving magnetic electromagnet(MME)/flow distribution valve/digital flow distribution
维普
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