A magneto-rheological fluid pilot pressure reducing valve

Abstract

The invention discloses a magneto-rheological fluid pilot pressure reducing valve, which comprises a main valve body, a main valve core, a spring, a valve seat, a damping disc, a bobbin frame, a coil and a valve sleeve; the main valve includes two left and right cavities Body, the left chamber communicates with the oil outlet, the right chamber communicates with the oil inlet, and the valve port is normally open; the left chamber communicates with the front chamber of the magnetorheological pilot valve through the damping hole, and the main valve core and the inner surface of the main valve form a moving pair; In the magneto-rheological pilot valve, the liquid flow channel between the winding frame, the positioning disc and the damping disc forms an axial and radial damping gap. When the coil of the magneto-rheological pilot valve is energized, the magnetic force line passes through the damping gap vertically, and the magnetic flow Under the action of the magnetic field, the viscosity of variable fluid increases rapidly; by adjusting the magnitude of the current, the pressure difference at both ends of the damping gap can be changed; the magnetorheological pilot valve has no moving spool, simple structure, and high control precision.

Description

technical field [0001] The invention relates to the field of magnetic flow valves, in particular to a magneto-rheological fluid pilot pressure reducing valve. Background technique [0002] Traditional control valves contain mechanical parts that can move with each other to complete the control of system pressure and flow. Sometimes, in order to improve the response speed and work performance of the valve, valve sleeves are often installed in the mechanical parts, which leads to the traditional The structure of the hydraulic valve is complex and the size is large. At the same time, due to the existence of movable parts, the friction and wear of the parts will be aggravated, which will lead to inaccurate moving positions, easy to cause leakage and reduce work efficiency. Due to the existence of moving pairs, the machining accuracy of each part High, resulting in high cost, but also has defects such as difficult control and slow response. [0003] The magnetorheological valve ...

AI Technical Summary

Problems solved by technology

However, when the width of the damping gap is too small, the damping gap will be blocked, and the damping gap is not perpendicular to the direction of the magnetic induction line, and its magnetic induction intensity will decrease, which in turn will reduce the pressure difference between the inlet and outlet of the magnetorheological valve.

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