Electromagnetic rheological fluid piston assembly

Abstract

The invention relates to a novel electromagnetic rheological fluid piston assembly, which is composed of an upper magnet conductor, a lower magnet conductor, a magnet conductor baffle plate, an electromagnetic solenoid, and a piston rod. The piston rod passes through the central channel of the upper magnetizer, the magnetizer baffle and the lower magnetizer respectively, and the head of the piston rod passing part is covered with a magnetic isolation sleeve, and at the same time, the upper magnetizer, the magnetizer baffle, and the lower There are two magnetic isolation sleeves between the magnetic conductor and the electromagnetic solenoid, and the magnetic isolation fastener located at the head of the piston rod connects the upper magnetic conductor, the magnetic conductor baffle plate, the lower magnetic conductor, the electromagnetic solenoid and the two magnetic conductors through the piston rod. A magnetic isolation sleeve is tightly connected.

Description

Technical field [0001] The present invention relates to fluid throttling device, fluid damper, electromagnetic rheological fluid damper of hydraulic system, especially the electromagnetic rheological fluid damper in electromagnetic rheological fluid damper / shock The electromagnetic rheological fluid damper on the piston in the shock absorber is also known as the piston assembly; another example is the electromagnetic rheological fluid damper located at the end of the electromagnetic rheological fluid shock absorber cavity. Set the electromagnetic rheological fluid damper). Background technique [0002] At present, the known electromagnetic rheological fluid application devices all adopt the external throttling damping structure in which the electromagnetic rheological fluid flows through the periphery of the electromagnetic solenoid. Throttle damping structure. It has been found in the application practice that it is difficult to deal with the guiding problem of the piston...

AI Technical Summary

Problems solved by technology

It has been found in the application practice that it is difficult to deal with the guiding problem of the piston when the external throttling damping structure is adopted. When the unbalanced load causes the piston rod guide sleeve and the seal to be in the state of cantilever beam stress, it will wear out prematurely. In order to overcome this problem, it has to be installed at one end of the piston. An additional guide piston is added to reduce the stress on the guide sleeve and seal; at the same time, when the external throttling damping structure is adopted, the magnetic gathering effect of the inner cavity of the electromagnetic solenoid cannot be effectively used, which is not conducive to energy saving, because at the same current intensity When energized, the magnetic lines of force in the inner cavity of the solenoid are the densest and the magnetic field is the strongest; in addition, in order to overcome the polishing effect of the electromagnetic rheological fluid on the electromagnetic solenoid, it is often necessary to add a magnetic isolation metal protective sleeve around it; secondly, an external throttling In the damping structure, the magnetic flux leakage of the electromagnetic solenoid is serious, so it is necessary to add magnetic isolation shoes at both ends of the piston

[0003] The internal throttling damping structure can completely overcome all the problems caused by the external throttling damping structure, but due to the limited space in the inner cavity of the electromagnetic solenoid, the design of the internal throttling damping structure is not easy

At the same time, the internal throttling damping structure is often a cup structure. When the piston diameter is small, the cup structure is difficult to process, which makes it difficult to mass produce and reduce costs.

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