吉林大学学报(工学版) ›› 2018, Vol. 48 ›› Issue (4): 1072-1084.doi: 10.13229/j.cnki.jdxbgxb20170590

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Electro-hydraulic proportional control model of accumulator

LIU Xiang-yong, LI Wan-li   

  1. School of Mechanical Engineering, Tongji University,Shanghai 201804,China
  • Received:2017-06-07 Online:2018-07-01 Published:2018-07-01

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Abstract: The passive intervention and oil storage of accumulator may bring a lot of uncertainties to the electro-hydraulic control. In this paper, the internal principle that the valve controls the cylinder in a crane luffing mechanism is studied. The modular model of the pilot valve, the main valve, the accumulator and the cylinder is built, and a contrast model without the accumulator is also built. Simulation and experiment results show that the passive intervention of the accumulator causes speed fluctuation of the cylinder in the outstretch stage, but it does not affect the cylinder in the retraction stage. According to the system pressure, the reduction of pump oil supply is equal to the oil discharge of the accumulator. The method can effectively solve the problem of speed fluctuation. Experiments verify the compensation scheme.

Key words: fluid transmission and control, accumulator, electro-hydraulic proportional control, dynamic model, speed fluctuation, compensation control

CLC Number: 

  • TH137
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