Hydraulic valve assembly unit capable of achieving multi-stage control and system thereof

Abstract

The invention discloses a hydraulic valve assembly unit capable of achieving multi-stage control and a system. The system is composed of a plurality of hydraulic valve assembly units capable of achieving multi-stage control, and the whole system at least reserves a P port, a T port, an A port and a B port outwards. The hydraulic valve assembling unit capable of achieving multi-stage control comprises a control unit valve block, wherein four cavities are formed in the control unit valve block; a double-acting hydraulic switch valve is arranged in each cavity; each double-acting hydraulic switchvalve comprises a switch valve block and two electromagnet units; the flow proportion of two high-speed switch valve electromagnetic valves can be selected according to needs; and the flow of the large-flow electromagnetic valve can be usually several times to dozens of times that of the small-flow electromagnetic valve. The hydraulic valve assembling unit is high in adjusting flexibility and high in adjusting control precision. Unit bodies with different output flows can be matched according to requirements while the response speeds and control precision characteristics of large and small high-speed switch valves are combined, so that hydraulic control with variable specifications is realized.

Description

technical field [0001] The invention belongs to a hydraulic valve control unit, in particular to a hydraulic valve assembly unit capable of realizing multi-stage control and a system thereof. Background technique [0002] High-speed switching valves are used more and more frequently in hydraulic systems, and their applications are becoming more and more extensive. However, the structures of current hydraulic switching valves are fixed, and the output digital fluid characteristics are the same under the same working condition. Under a fixed pressure, the flow rate of the high-speed switching valve is constant. When the flow rate of the high-speed switching valve is large, the output oil volume in a single opening and closing cycle is large, and the controlled actuator responds quickly and moves quickly. However, the output flow pulsation is also larger, and the oil chamber connected to it is more likely to generate pressure pulses, and the controlled actuator is easy to shake...

AI Technical Summary

Problems solved by technology

[0002] High-speed on-off valves are used more and more frequently in hydraulic systems, and their applications are becoming more and more extensive. However, the structures of current hydraulic on-off valves are fixed, and the output digital fluid characteristics are the same under the same working conditions.

Under a fixed pressure, the flow rate of the high-speed switching valve is constant. When the flow rate of the high-speed switching valve is large, the output oil volume in a single opening and closing cycle is large, and the controlled actuator responds quickly and moves quickly. However, the output flow pulsation is also larger, and the oil chamber connected to it is more likely to generate pressure pulses, and the controlled actuator is easy to shake, resulting in low control accuracy; when the flow rate of the high-speed switching valve is small, the single opening and closing cycle The volume of the oil output inside is small, the output flow pulsation is also smaller, and the oil chamber connected to it is less likely to generate pressure pulses, the controlled actuator moves more stably, and the control accuracy is higher. However, the controlled actuator Its dynamic characteristics are also affected when the movement speed of the

Although the existing technology has a structure that combines response speed and control precision, it cannot achieve multi-gradient regulation and cannot be applied to complex systems with multiple precision levels

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