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Flow Simulation Analysis and Structure Improvement of Hydraulic Poppet Valve

Author: ZhengNingZhou
Tutor: TianQi；WangJin
School: Chang'an University
Course: Mechanical Manufacturing and Automation
Keywords: Poppet valve Simulation Flow field Improve
CLC: TH137.52
Type: Master's thesis
Year: 2011
Downloads: 98
Quote: 0
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Abstract


The poppet valve an important role in the hydraulic control valve , widely used in cartridge valves , two-way cartridge valves and other traditional non- plug -mounted control valve . The mouth of the valve to pass flow characteristics , the spool by force characteristics, and so affect the control accuracy and stability of the system transient response characteristics . Meanwhile, the temperature rise generated by the throttling effect of the valve port , cavitation and other hazards , will also affect the application of the cone valve . Therefore , the use of theoretical analysis and simulation of cone valve above features and cutting hazards research has important theoretical significance and value of engineering applications . Firstly, the system studied different hydraulic valve cone valve structure characteristics , and compare their similarities and differences , and discuss key issues need to be studied for the poppet valve . The poppet valve flow gain , fluid resistance and fluid dynamic calculation methods , the analysis of the structural parameters of its impact , and pointed out that the spool cone angle affect the performance of the most important parameters of the poppet valve . Poppet right angle edge the seat forms of cone valve for the specific object of study , simulation platform based on the hydraulic system , the establishment of the cone valve simulation model , and its steady-state and transient characteristics of the simulation analysis . Based on the simulation results , the spring stiffness and preload of the poppet valve flow - pressure steady-state and transient response characteristics . Numerical simulation of the liquid flow state within the poppet valve spool stationary state and the spool in the different velocities of the flow field , intuitively reflect the spool stationary and moving at different speeds when the valve liquid velocity and static pressure distribution. The poppet valve is easy to produce cavitation area is the back side of the valve port . At the same time , the simulation calculated valve port \On the basis of theoretical analysis and numerical simulation , improved the structure of the poppet valve . Improved , the cone valve through-flow characteristics are improved cavitation influence weakened .

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CLC: > Industrial Technology > Machinery and Instrument Industry > Mechanical parts and gear > Hydraulic transmission > Hydraulic components > Hydraulic control valves
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