Magnetorheological Pressure Control Valve

Abstract

The invention relates to a magnetorheological pressure control valve. The control valve includes a valve cover, a coil assembly 2, an upper valve body, a lower valve body, a lower valve core, the first and second rubber sealing rings, a working chamber, an upper valve, a return spring, an adjusting nut, and the valve cover is fixed to the lower valve body. Connected to the upper and outer sides of the lower valve body; the upper valve body and the adjustment nut are connected to the inner side of the upper valve body, and a return spring in a compressed state is provided under the adjustment nut, and the lower part of the return spring is pressed above the upper valve core, and the upper valve core is set on the Inside the upper valve body; the lower part of the upper valve core presses the upper end of the disc above the lower valve core, the lower valve core is set in the lower valve body, and the lower part of the lower valve core presses on the upper side of the oil inlet of the lower valve body; the upper valve body and A working chamber is formed between the lower valve bodies, the coil assembly is arranged in the groove of the upper valve body, and the upper side of the coil assembly is in contact with the inner side of the valve cover. In the present invention, the coil assembly is arranged on the upper side of the working chamber, away from the magneto-rheological fluid, so that the influence of the heating of the electromagnetic coil on the magnetorheological fluid is smaller, and the heat dissipation effect of the magnetorheological fluid is better.

Description

technical field [0001] The invention relates to a magneto-rheological pressure control valve, in particular to controlling the opening pressure of the valve by controlling the extrusion force of the magneto-rheological fluid received by the valve core during its movement, so as to realize the pressure control of the hydraulic system. magnetorheological pressure control valve. Background technique [0002] Common pressure control valves usually control the system pressure by controlling the preload of the spool spring. Traditional pressure control valves control the pre-tightening force of the control spool spring by changing the magnetic field of the electromagnetic coil, thereby changing the force required for the spool to open, and then controlling the system pressure. In the traditional design, the machining accuracy is high, and the product consistency is poor; the requirements for the valve core spring are very high, and it is not easy to realize the rapid and stepless...

AI Technical Summary

Problems solved by technology

In the traditional design, the machining accuracy is high, and the product consistency is poor; the requirements for the valve core spring are very high, and it is not easy to realize the rapid and stepless pressure change; the valve core movement is generally small; the power consumption is very low. Large, energy efficiency is not high; under a certain volume requirement, the pressure adjustable range is small

[0003] The disadvantage of the magnetorheological pressure control valve described in the prior application ZL 2012 2 0409103.X is that the structure required to achieve this effect of pressure control is too complicated, and the required sensors are expensive and complicate the control method; Four O-ring seals are used inside the valve body, which is cumbersome for processing and assembly; the coil assembly is arranged outside the working chamber, which limits the effective size of the working chamber; in addition, the magnetic force lines of the designed magnetic field need to be established with the aid of the valve structure outside the body, which affects the maximization of the intended effect of the control valve

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