Magneto-rheological fluid mount based on unidirectional extrusion mode

Abstract

The invention discloses a magnetorheological fluid suspension based on a unidirectional pressing mode, which comprises a housing, a rubber spring, a reinforcing plate and a connecting rod, wherein the rubber spring is plugged in the opening of the top end of the housing, the reinforcing plate is embedded in the top surface of the rubber spring, and the connecting rod runs through the entire suspension. The magnetorheological fluid suspension is characterized in that the housing is a frame which comprises an upper support, a lower support and a middle base fixedly connected with one another; a magnet core assembly is arranged in the frame, the magnet core assembly comprises a coil base which is mounted upside down at the bottom of the upper support, and an excitation coil is embedded in a groove in the coil base; the lower support, the middle base and the bottom surface of the magnet core assembly jointly define a magnetorheological fluid chamber which is closed and filled up with magnetorheological fluid, a pressing disk fixed on the connecting rod is located in the magnetorheological fluid chamber, and the magnetorheological fluid works in the unidirectional pressing mode in the process of suspension resilience. The magnetorheological fluid suspension can realize a wide dynamic stiffness adjustment range and low zero-field dynamic stiffness and effectively improve the high-frequency vibration isolation performance and low-frequency relative displacement control performance of a suspension system.

Description

technical field [0001] The invention relates to the technical field of using magnetorheological fluid for vibration reduction, in particular to a magnetorheological fluid squeeze mount used for engine mount systems of automobiles, ships, engineering machinery and the like. Background technique [0002] Magnetorheological fluid is a smart material with rheological properties, that is, under the action of an external magnetic field, the material properties of magnetorheological fluid, especially the viscosity, can be quickly and reversibly adjusted between Newtonian fluid and semi-solid state. Magneto-rheological fluid mount is one of the typical applications of magnetorheological fluid. This semi-active actuator has the characteristics of millisecond-level response speed, large damping force, simple structure, good durability, low energy consumption and good substitution , under the control of the external magnetic field, the real-time adjustment of the stiffness and damping ...

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Problems solved by technology

[0004] Based on this, the Chinese invention patent "engine magnetorheological hydraulic mount based on extrusion mode", publication number: CN103148158A, discloses a magnetorheological fluid extrusion mount for automobile powertrain mount system. The upper and lower extruded plates, inertial channel and decoupling membrane are set in the mount, which realizes the control of the magnetic field strength of the extruded gap, and then controls the dynamic stiffness of the mount, but the inertial channel structure adopted in the mount will produce Magneto-rheological fluid high-frequency resonance phenomenon, which deteriorates the high-frequency vibration isolation performance of the mount

Chinese invention patent "engine magnetorheological hydraulic mount based on mixed mode", publication number: CN104088955A discloses a mixed mode engine magnetorheological hydraulic mount, which is formed between the extruded pole plate and the extruded coil seat Extrusion damping channel, forming a flow damping channel between the outer magnetic core and the flow coil seat, adopts the mixed mode structure of flow mode and extrusion mode, which increases the adjustable range of damping force and improves the vibration isolation capability of the suspension, but the damping The use of channels will also deteriorate the high-frequency vibration isolation performance of the mount, and the magnetorheological fluid extrusion mode works in the compression process of the mount, which is not conducive to the control of the relative displacement of the mount

Both of the above two patents use a large amount of magnetorheological fluid, which reduces the use efficiency of magnetorheological fluid and increases the production cost

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