Damping-clearance mechanical adjustable double-coil magnetorheological valve

Abstract

The invention discloses a damping-clearance mechanical adjustable double-coil magnetorheological valve which comprises an end cover, a spool, a valve block, a reel, a self-locking nut, a coil I, a coil II, a seal ring, a screw and the like. When the spool rotates to a proper position and inputs current of certain direction and certain magnitude to the coil I and the coil II, magnetic field generates in three conical damping clearances formed by the spool and the reel, and the direction of the magnetic field is substantially perpendicular to the flow direction of magnetorheological fluid. When flowing into the conical damping clearances, the magnetorheological fluid is semi-solidified fast under the action of the magnetic field, the viscosity increases fast and increases with increase of magnetic induction intensity, pressure difference between two ends of the damping clearances is caused to increase and accordingly flowing of the magnetorheological fluid can be slowed down or prevented. High pressure difference between an inlet and an outlet of the magnetorheological valve can be obtained by controlling the operating position of the spool and the magnitude and direction of the current input to the two coils. The damping-clearance mechanical adjustable double-coil magnetorheological valve is applicable to hydraulic servo control systems with wide pressure adjustment range.

Description

technical field [0001] The invention relates to a magnetorheological valve, in particular to a mechanically adjustable damping gap double-coil magnetorheological valve. Background technique [0002] 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 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 of the core control units in the hydraulic control system. [0003] Traditional hydraulic control valves include directional control valves, flow control valves and pressure con...

AI Technical Summary

Problems solved by technology

However, the thickness of the damping gap of these three types of magnetorheological valves is fixed and cannot be adjusted, so the pressure difference between the inlet and outlet of the valve is small, the pressure adjustment range is narrow, and the adjustment method is single, which can only be used in low-pressure systems, thus hindering the magnetic flow Industrial application development of variable valve

In addition, in the structural design of some magneto-rheological valves, in order to achieve the largest possible control effect of the pressure difference between the inlet and outlet of the valve, the thickness of the damping gap is artificially designed too small or the effective damping length is increased. Small blockage, or the external structure of the valve is too large

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