Pressure-reducing and flow rate-increasing swtich liquid pressure source with oil returning back pressure

Abstract

The present invention discloses a pressure-decreasing flow-increasing type switch hydraulic source with oil-returning backpressure, which is characterized by that the high-speed switch valve and liquid inductance element are series-connected on the hydraulic main line oil supply pipeline, the backpressure valve is connected on the hydraulic main line oil-returning pipeline, the non-return valve and liquid volume element are respectively cross-connected between the hydraulic main line oil supply pipeline and oil-returning pipeline, the output end of the non-return valve is connected with output end of high-speed switch valve and input end of liquid inductance element, and the input end of liquid volume element is connected with output end of liquid inductance element, and the output end ofnon-return valve and output end of liquid volume element are connected with input end of backpressure valve.

Description

technical field [0001] The present invention relates to boosters or liquid pressure converters. Background technique [0002] One of the biggest advantages of the hydraulic system is its multi-actuator feature, that is, a single hydraulic pump can supply oil and drive multiple actuators at the same time. [0003] At present, most of the production line hydraulic systems of industrial, mining, metallurgical, steel and other enterprises adopt the hydraulic bus oil supply mode: the pump station outputs one pressure oil pipe, one control oil, one return oil and one leakage oil, and all hydraulic actuator control units All are hung on the hydraulic bus. Since the oil supply pressure on the hydraulic bus is constant, the load of each actuator is required to adapt to the oil supply pressure, or a pressure reducing valve is required (reducing the oil supply pressure on the hydraulic bus to adapt to the actuator load ) and then hang the actuator to the h...

AI Technical Summary

Problems solved by technology

Although it is possible to adapt the output pressure of the pump to the maximum load pressure by means of load sensing, there is also the problem that it is impossible to increase the pressure and reduce the pressure and increase the flow. The throttling loss is still very large, and the energy waste is serious

[0005] Although the common step-down switching hydraulic source can realize step-down and flow-increasing, due to the low oil return back pressure, it is easy to cause pressure fluctuations when the check valve sucks oil from the oil return line or cause cavitation in the high-frequency pressure switching cavity. Seriously affect the efficiency and reliability of the switch hydraulic source

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