Three-stage pressure regulating double-coil type magneto-rheological valve

Abstract

The invention discloses a three-stage pressure regulating double-coil type magneto-rheological valve which is composed of an end cover, a valve core, a valve body, a positioning block, a guide block, a positioning pin, a coil I, a coil II, a sealing ring, a screw and the like. When current with certain direction and size is input into the coil I and the coil II, a magnetic field can be generated in three damping gaps formed by the valve core and the valve body; and the direction of the magnetic field is vertical to the direction of a flowing direction of magneto-rheological liquid. When the magneto-rheological liquid flows into the damping gaps of the magneto-rheological valve, the magneto-rheological liquid is rapidly changed into a semi-solid state under the effect of the magnetic field; the viscosity of the magneto-rheological liquid is rapidly increased along the magnetic induction strength so as to cause that a pressure difference between two ends of the damping gaps to be increased; and therefore, the flowing of the magneto-rheological liquid is slowed or stopped. The pressure difference between the two ends of the damping gaps is controlled through controlling the size and the direction of the current input into the two coils, so as to form three-stage pressure regulation and control a pressure difference between an inlet and an outlet of the magneto-rheological valve. The magneto-rheological valve is applicable to a multi-stage low-pressure small-flow hydraulic control system with an adjustable pressure.

Description

technical field [0001] The invention relates to a magneto-rheological valve, in particular to a three-stage pressure-regulating double-coil magneto-rheological valve. Background technique [0002] Hydraulic control systems are not only widely used in civil machinery processing, vehicles and construction industries, but also in aerospace, aviation and military products. In the hydraulic control system, the hydraulic control valve is mainly used to control the pressure, flow and flow direction of the liquid flow in the hydraulic actuator, so as to control the start and stop of the hydraulic actuator, change the speed, direction, force and action sequence of the movement, etc. To meet the requirements of various hydraulic equipment for load conditions such as motion, speed, force and torque. Therefore, the performance of the hydraulic control valve directly affects the static characteristics, dynamic characteristics and working reliability of the hydraulic system, and is one o...

AI Technical Summary

Problems solved by technology

However, the pressure difference between the inlet and outlet of the commonly used single-coil magneto-rheological valve is small, and the range of pressure conditions is also narrow, which hinders the development of industrial application of the magnetorheological valve.

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