Study on Characteristics of 2D Cartridge Electro-hydraulic Proportional Flow Rate Valve

doi:10.3901/JME.2022.20.421

Abstract

Abstract: The cartridge of electro-hydraulic control components is the mainstream development trend of mobile hydraulic control system. The existing 2D proportional valve is oriented to the traditional industrial hydraulic field, which is limited by the structureof hydraulic bridge and compression-torsion coupling, and cannot realize cartridge. The structural principle of a novel 2D cartridge electro-hydraulic proportional flow valve is proposed in this paper. The bi-directional roller coupling is introduced between the electro-mechanical converter and the half-bridge 2D valve body to realize functions of force transmission, valve spool position feedback and linear-rotary motion conversion. Based on the linear theory, the characteristic equation of the valve is derived, and the working stability of the valve is determined by using the Nyquist criterion. In order to realize the optimal design, a co-simulation model based on AMESim, ADAMS and Matlab / Simulink was established. The effects of key structural parameters on dynamic characteristics were studied. Finally, the prototype was designed and manufactured, and the experimental benches of bi-directional roller coupling and 2D cartridge valve were built. The static and dynamic characteristics of coupling and the no-load flow characteristics, load flow characteristics, leakage characteristics, frequency response and step characteristics of valve prototype were studied. Experimental results show that the prototype has good working performance. When the preload is 40 N, the maximum output torque of the coupling is 2.3 N·m, the output angular displacement is 0.42°, the hysteresis is 5.25 %, and the response time is 32.5 ms. When oil supply pressure is 12 MPa, the no-load flow rate of prototype valve can reach 61.5 L/min, hysteresis is 6.32 %, response time is 68.5 ms, amplitude frequency bandwidth is 19.7 Hz, and phase frequency bandwidth is 22.1 Hz. Research shows that 2D cartridge valve has good static and dynamic characteristics, which is an ideal solution for flow control valve of mobile electro-hydraulic control system.

Key words: cartridge valve, 2D valve, proportional valve, static and dynamic characteristics, stability criterion

CLC Number:

TH137

MENG Bin, YANG Guanzheng, XU Hao, LI Sheng, RUAN Jian. Study on Characteristics of 2D Cartridge Electro-hydraulic Proportional Flow Rate Valve[J]. Journal of Mechanical Engineering, 2022, 58(20): 421-437.

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