The Study On The Design Of Counterbalance Valve Adapting To The Load Change

Hydraulic counterbalance valve, which belongs to hydraulic control component of hydraulic technique, is applied abroad in ship industry, metallurgical industry, machine tools, automobile and engineering machinery and other industries, especially in hoisting machinery. Hydraulic counterbalance valve is the key component in the balance loop. The performance of the balance loop is influenced by the property of the counterbalance valve. It ensures the reliability and stability of mechanical equipment in the balance loop and greatly improves the security of mechanical equipment so as to protect the lives and properties. The existing hydraulic counterbalance valves meet basically the requirements of most of the equipment. But there are also inadequacies such as the complex structure, the high pilot pressure, the bad system stability and the large power loss.To solve the above problems, this paper presents a new type of counterbalance valve adapting to the load change. First design the schematic of the counterbalance valve, then design the structures of it, which include the check valve, the hydraulic control one-way valve and the throttle valve. This paper first builds a mathematical model of the counterbalance valve on this basis, then builds the simulation model by MATLAB/Simulink and sets up simulation parameters. Results have shown that the counterbalance valve is able to adapt to the load change. Its structure is more simple and reliable, system stability is better, response is more quickly, pilot pressure is lower and power loss is lower. These are also the main advantages of counterbalance valve adapting to the load change. This has positive effects on safe operation and energy saving so as to protect the lives and properties and increase economy features.