Design and Simulation on Multi-Digit Numerical Control Valve in Water Hydraulics

Abstract:

Due to the problems about Lubrication and sealing in water hydraulics, the poor performance, large leakage, extreme requirements of processing, high cost and poor anti-pollution properties exist in water hydraulic servo or proportional valves of spool structure and analogue control. A better seal is provided by the structure of the poppet valve comparing to the spool valve, however, poorer linearity and control accuracy accompanying inevitably. Aiming at improving the control performance of poppet valve, the design of the multi-digit numerical control valve is analyzed in this paper. The novel design using ball seat valves for digital bits is proposed to ensure enough seal ability and lower the cost. The simulation model of the multi-digit numerical control valve is built in AMESim software and the results show high linearity in flow control. However, large overshoot and oscillation encounter during the switching of the digits. Especially the switching process of the high digital bits requires to be regulated to reduce the large overshooting. The adjustment of the spring in the sensitive chamber of the bit valve can decrease the overshoot and improve the stability. These above contribute to the improvement of the control performance of water hydraulic control valves and applications of water hydraulics in the industry.

• Periodical: Advanced Materials Research (Volume 422)
• Pages: 257-261
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.422.257
• Online since: December 2011
• Authors: Zeng Meng Zhang, Yong Jun Gong
• Keywords: AMEsim, Ball Seat Valve, Digital Valve, Water Hydraulic

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