A testing device for dynamic characteristics of piston-type magneto-rheological fluid extrusion flow

Abstract

The invention discloses a piston type testing device for the squeezing flow dynamic characteristics of magnetorheological fluid. The testing device comprises an upper flange plate 1, an upper end cover 2, an upper connecting bolt 3, an upper piston rod 4, a piston 5, a lower piston rod 6, a locating sleeve 7, a magnet exciting coil 8, a lower end cover 9, a lower connecting bolt 10, a lower flange plate 11 and a plurality of sealing rings. The fluid to be tested is contained in an airtight working cavity A formed by the upper end cover 2, the lower end cover 9 and the locating sleeve 7. The piston 5 is clamped by the shaft shoulder of the upper piston rod 4 and the shaft shoulder of the lower piston rod 6 and arranged in the working cavity A, and the upper piston rod 4 and the lower piston rod 6 move vertically to drive the piston 5 to squeeze the fluid to be tested in the working cavity A. The testing device is used for testing the squeezing flow dynamic characteristics of the magnetorheological fluid in a quasi-static state, a dynamic state and particularly a high-frequency vibrating state.

Description

technical field [0001] The invention belongs to the technical field of dynamic characteristic testing, and in particular relates to a dynamic characteristic testing device for piston-type magnetorheological fluid extrusion flow on an excitation table. Background technique [0002] Magnetorheological fluids are widely used in various engineering instruments and equipment. The MR fluid extrusion mode generates higher pressure than other modes and can be used to isolate vibrations with small amplitude and large dynamic loads. Its extrusion flow dynamics directly affect the performance of the application equipment. At present, most of the studies on the extrusion characteristics of magnetorheological fluids are limited to static, quasi-static processes or dynamic characteristics under low-frequency excitation, and there are relatively few studies on the dynamic characteristics of magnetorheological extrusion flow under high-frequency excitation. In addition, the influence of t...

AI Technical Summary

Problems solved by technology

At present, most of the research on the extrusion characteristics of magnetorheological fluids is limited to static, quasi-static processes or dynamic characteristics under low-frequency excitation, and there is relatively little research on the dynamic characteristics of magnetorheological extrusion flow under high-frequency excitation.

In addition, the influence of the structure and materials of the test device itself on the magnetic field magnetic circuit and its influence on the dynamic characteristics of magnetorheological fluid extrusion flow have not yet been clarified.

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