Screw rod type magnetorheological rotary damper

Abstract

The invention relates to a screw rod type magnetorheological rotary damper which comprises a screw rod, an outer cylinder and a magnetic field generator, wherein the outer cylinder has single-layer structure or double-layer structure; and magnetorheological fluid is fully filled between the screw rod and the outer cylinder and between the inner and the outer layers of the outer cylinder. When the outer cylinder has the double-layer structure, the circumferences at the two ends of the inner layer are provided with through holes; and when the screw rod and the outer cylinder have relative rotation, the magnetorheological fluid filled between the screw rod and the inner layer of the outer cylinder enters into an inner interlayer and an outer interlayer of the outer cylinder through the through hole at one end of the inner layer of the outer cylinder under the extrusion of the screw rod, and then flows out through the through hole at the other end of the inner layer of the outer cylinder to enter the other end of the screw rod, so that the magnetorheological fluid flows in a circulating way between the inner and the outer layers of the outer cylinder. The viscosity of the magnetorheological fluid inside the damper can be changed by adjusting the magnetic field intensity of the magnetic field generator, so that the resistance can be changed when the magnetorheological fluid in the damper flows in a circulating way between the inner and the outer laters of the outer cylinder, and the controllability of rotating damping force of the screw rod type magnetorheological rotary damper can be realized.

Description

technical field [0001] The invention relates to a magnetorheological damper, in particular to a magnetorheological rotary damper. Background technique [0002] Ordinary rotary dampers are manufactured using the principle that viscous grease produces damping force on the movement of moving parts, and the torque of this type of rotary damper is difficult to adjust during use. The magnetorheological rotary damper can overcome this defect, but the ordinary magnetorheological rotary damper mostly adopts the rotary vane structure, such as the "high-performance multi-plate rotary magnetic "Rheological damper", although it can also generate rotational damping force, its structure is relatively complicated; since the damper only uses the shear working mode of the magneto-rheological fluid device to generate rotational damping force, it is necessary to improve the device's inherent Rotational damping force must increase the shear area of ​​the device, and increasing the shear area of...

AI Technical Summary

Problems solved by technology

[0002] Ordinary rotary dampers are manufactured using the principle that viscous grease produces damping force on the movement of moving parts, and the torque of this type of rotary damper is difficult to adjust during use

The magnetorheological rotary damper can overcome this defect, but the ordinary magnetorheological rotary damper mostly adopts the rotary vane structure, such as the "high-performance multi-plate rotary magnetic "Rheological damper", although it can also generate rotational damping force, its structure is relatively complicated; since the damper only uses the shear working mode of the magneto-rheological fluid device to generate rotational damping force, it is necessary to improve the device's inherent Rotational damping force must increase the shear area of ​​the device, and increasing the shear area of ​​the device can only be solved by increasing the diameter of the rotary vane or increasing the number of rotary vanes, and increasing the diameter of the rotary vane or increasing the number of rotary vanes will further increase The complexity of the device structure

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