Flow control valve generally consists of constant pressure difference reducing valve and throttle valve.When it works under the condition of high differential pressure and flow, the pressure loss of reducing valve in-...Flow control valve generally consists of constant pressure difference reducing valve and throttle valve.When it works under the condition of high differential pressure and flow, the pressure loss of reducing valve in-stalled in main loop will get increased and the hydraulic oil temperature will be increased as well. A digital pilotflow control valve is studied in this paper. The main stage is a cartridge valve based on the flow amplifying princi-ple. The pilot stage is digital flow control valve which consists of digital valve and constant pressure difference re-ducing valve. The digital valve controlled by PWM signal has some characteristics such as less throttling loss andgood repeatability. The high pressure loss and hydraulic oil temperature will be effectively reduced by using con-stant pressure difference reducing valve in the small flow pilot circuit. Through theoretical derivation and simula-tion research, the feasibility of this valve is verified, and some conclusions are drawn for the relationships betweenthe performance and structure parameters, which provides theoretical basis for their design.展开更多
基金supported by National Natural Science Foundation of China ( No. 51205271)Specialized Research Fund for the Doctoral Program of Higher Education ( No. 20121402120002)
文摘Flow control valve generally consists of constant pressure difference reducing valve and throttle valve.When it works under the condition of high differential pressure and flow, the pressure loss of reducing valve in-stalled in main loop will get increased and the hydraulic oil temperature will be increased as well. A digital pilotflow control valve is studied in this paper. The main stage is a cartridge valve based on the flow amplifying princi-ple. The pilot stage is digital flow control valve which consists of digital valve and constant pressure difference re-ducing valve. The digital valve controlled by PWM signal has some characteristics such as less throttling loss andgood repeatability. The high pressure loss and hydraulic oil temperature will be effectively reduced by using con-stant pressure difference reducing valve in the small flow pilot circuit. Through theoretical derivation and simula-tion research, the feasibility of this valve is verified, and some conclusions are drawn for the relationships betweenthe performance and structure parameters, which provides theoretical basis for their design.
基金Key scientific research project foundation of Universities and Colleges in Henan Province(16A460020)High level talent research starting project foundation of NCWU(201531)Scientific and technological project foundation in Henan province(182102210063)~~
