Magneto-rheological vibration isolator with adjustable damping channel width

Abstract

The invention discloses a magneto-rheological vibration isolator with an adjustable damping channel, which comprises a magneto-rheological fluid, a housing with an open top for containing the magnetorheological fluid, a rubber main spring blocked at the top opening of the housing, A connecting rod fixedly connected to the rubber main spring at one end, a rubber bottom film arranged at the inner bottom of the casing, a magnetic core assembly arranged in the casing and separating the inner chamber of the casing into an upper chamber and a lower chamber, the magnetic core assembly It includes an excitation coil, an outer magnetic core fixed on the inner wall of the housing, an inner magnetic core that can move up and down relative to the outer magnetic core, and a control device for controlling the up and down movement of the inner magnetic core. The cores cooperate to form a tapered damping channel for communicating the upper cavity with the lower cavity, and the width of the damping channel can be changed by controlling the vertical position of the inner magnetic core. The device of the invention can directly meet the requirements of different automobile powertrains by adjusting the width of the damping channel, thereby improving the versatility of the magneto-rheological vibration isolator.

Description

technical field [0001] The invention relates to a power assembly magneto-rheological vibration isolator, in particular to a power assembly damping channel width adjustable magneto-rheological vibration isolator. Background technique [0002] The viscosity and yield stress of magnetorheological fluid can change with the change of the external magnetic field, and this change has the characteristics of fast, reversible and controllable. The magneto-rheological vibration isolator uses the characteristics of the magneto-rheological fluid to change the output damping force of the magneto-rheological hydraulic vibration isolator by controlling the current in the excitation coil to change the magnetic field strength, thereby attenuating the vibration of the powertrain. This process responds quickly, and the process is continuous and reversible. [0003] Existing magneto-rheological vibration isolators for automotive powertrain vibration isolation systems are generally composed of h...

AI Technical Summary

Problems solved by technology

[0003] Existing magneto-rheological vibration isolators for automotive powertrain vibration isolation systems are generally composed of housings, rubber main springs, magnetic cores, rubber bottom films and seals. The vibration device has the following disadvantages: 1) The existing magneto-rheological hydraulic vibration isolator has poor versatility and a relatively simple structure; it is difficult to meet the dynamic characteristics requirements of different vehicle powertrains for the vibration isolator system

2) The structure of the existing single-mode or multi-mode magnetorheological isolators is fixed, and the dynamic characteristics of the magnetorheological isolator can only be changed by external excitation current, which makes the vibration isolation performance limited

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