Abstract
Based on the control principle and flow distribution characteristics of the electro-hydraulic proportional load-sensitive multiway valve in an excavator, a system simulation model is established in AMEsim. After proving the accuracy of this model by comparing simulation results with theoretical results for various flow distribution characteristics under saturated and unsaturated conditions, this model is used to study the effect of three-way valve preload on the multiway valve system to prove that the simulation method can evaluate the influence of design parameters on the multiway valve system and then guide the design of multiway valves.
Highlights
Multiway valve is a highly integrated hydraulic control component, which can simultaneously control multiple actuators with a pump in a hydraulic control system
Wk X k qs )2 Wk X k qs )2 Wk X k i. It can be seen from the formulas that, in the quantitative pump system, the multiway valve system can be influenced by many parameters, such as each actuator corresponds to the flow area of the main valve, the overflow flow of the three-way flow valve, the load sensitive pressure, the pressure compensation valve spring preload, total flow required by the actuator and so on
In this paper, based on the above control principle and flow distribution characteristics, a mechanical-hydraulic system simulation model is established by using the HCD library, the signal and control library, the planar mechanical library and the hydraulic library in AMEsim
Summary
Multiway valve is a highly integrated hydraulic control component, which can simultaneously control multiple actuators with a pump in a hydraulic control system. Ref.[8] used Adams and AMEsim co-simulation method to study the dynamic characteristics of LUDV (Load pressure-independent flow distribution) system of multiway valve. To verify the accuracy of the model, theoretical analyses and simulation results are compared in the flow distribution characteristics under saturated and unsaturated conditions. This model is used to study the influence of the spring preload of the three-way flow valve on the system. This method provides a reference for the design of multi-control valves
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