Shearing mode magnetorheological damper

Abstract

The invention discloses a shearing mode magnetorheological damper comprising an inner barrel, an outer barrel and a telescopic barrel located between the inner barrel and the outer barrel. The telescopic barrel and the inner barrel as well as the outer barrel are sealed by seal rings so as to form a closed cavity. The cavity is filled with magnetorheological fluid. A telescopic rod moving along with the telescopic barrel is arranged in the telescopic barrel. A coil base is fixed to the tail end of the telescopic rod. An annular coil groove is formed in the outer wall of the coil base. A coil is wound in the coil groove. A magnetic field is produced after the coil is electrified. Working clearances are reserved between the telescopic barrel and the inner barrel as well as the outer barrel.The magnetic field acts on the magnetorheological fluid in the working clearances. A small hole is formed in the bottom of the outer barrel. A compensating barrel is installed outside the small hole.The shearing mode magnetorheological damper has significant low-frequency large-damping characteristics, when a vehicle turns, quite large antiroll damping force can be provided, thus rolling of a vehicle body is effectively restrained, and curve trafficability and driving safety of the vehicle are improved.

Description

technical field [0001] The invention relates to a shear mode magneto-rheological shock absorber, which belongs to the field of auto parts. Background technique [0002] Magnetorheological fluid is a material whose rheological properties such as viscosity and plasticity change sharply under the action of an external magnetic field. A controllable yield strength is produced, and this change is reversible. By changing the magnitude of the current, the rheological properties of the magnetorheological fluid can be effectively controlled. According to this principle, a magnetorheological shock absorber with continuously adjustable damping force can be designed. [0003] At present, the common magnetorheological shock absorbers are mostly telescopic valve magnetorheological shock absorbers, which generate a pressure difference between the upper and lower chambers through the up and down movement of the piston, so that the magnetorheological fluid flows through the damping channel ...

AI Technical Summary

Problems solved by technology

Considering that when the vehicle is turning, the frequency of vehicle body roll is low, and the telescopic valve magneto-rheological shock absorber cannot provide sufficient damping force to achieve effective roll control, which may lead to vehicle rollover accidents in severe cases

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