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10:00 ics Saal 5
Characteristics of Proportional Flow Control Poppet Valve with Pilot Pressure Compensation
Jiahai Huang, Taiyuan University of Technology, China
Youshan Gao, Taiyuan University of Science and Technology
Electro-hydraulic proportional flow valves are widely used in hydraulic industry. There
are several different structures and working principles. However, flow valves based on
the existing principles usually have some shortcomings such as the complexity of the
system and additional energy losses. A concept for a two-stage poppet flow valve with
pilot pressure compensation is presented, and the linear relationship between the pilot
stage and main stage, the quasi-steady flow rate equation are used in its flow controller.
To achieve the accurate control of the mian valve outlet flow, the actual input voltage of
the pilot valve is regulated according to the actual pilot pressure drop and the given
input voltage. The results show that the pilot pressure compensation method is feasible,
and the two-stage poppet flow valve with this compensation method, which consists of
a Valvistor and a 4WRPEH 6 servo solenoid directional control valve, has a good static
and dynamic performance.