A magneto-rheological damper with double annular damping gap

Abstract

The invention discloses a magneto-rheological damper with a double annular damping gap. An inner cylinder is arranged inside an outer cylinder, and the inner cylinder includes an upper section of the inner cylinder, a middle section of the inner cylinder and a lower section of the inner cylinder from top to bottom. ;The outer cylinder, the upper part of the inner cylinder and the lower part of the inner cylinder are made of high magnetic permeability material, and the middle part of the inner cylinder is made of non-magnetic material; the upper end of the outer cylinder and the inner cylinder is provided with a cylinder upper cover , the lower end is provided with the lower cover of the cylinder, and the inside of the inner cylinder is provided with a piston rod, one end of the piston rod protrudes to the outside of the upper cover of the cylinder, and the other end is set through a low carbon steel disc; the piston rod is provided with a piston head , a damping generator is set between the piston head and the low-carbon steel disc, and the upper and lower ends of the damping generator are respectively provided with non-magnetic materials for isolating the magnetic field; the middle of the damping generator is provided with a high-permeability material for changing the magnetic field distribution materials and non-magnetic materials. The utilization rate of the magnetic field is improved, and the damping force range and dynamic range are significantly improved.

Description

technical field [0001] The invention belongs to the technical field of magnetorheological dampers, in particular to a magnetorheological damper with double annular damping gaps. Background technique [0002] Magnetorheological fluid is a kind of controllable fluid, which is a relatively active research in smart materials. In the absence of a magnetic field, the magnetorheological fluid exhibits low-viscosity non-Newtonian fluid characteristics; while under the action of a magnetic field, it exhibits high-viscosity, low-fluidity Bingham characteristics. The magnetorheological damper based on magnetorheological fluid is a semi-active damping device, which is widely used in construction, artillery, automobiles, aerospace and other fields. [0003] Magneto-rheological dampers come in a variety of designs, but the most common is to place the coil on the piston head. The principle of the magnetorheological damper is that the direction of the magnetic field at the effective damp...

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Problems solved by technology

Because the piston head occupies a large space, the effective damping gap is only located at both ends of the piston head, resulting in a very low utilization of the magnetic field; (2) The dynamic range is small

The superiority of magnetorheological damper performance is generally reflected in the dynamic range, while the viscous damping force and controllable damping force of the two common magnetorheological dampers are both low, and the range of controllable damping force increase is limited, causing The dynamic range is small; (3) When the damping gap is located on the piston head, it is easy to cause magnetic flux leakage, which makes it difficult to achieve the expected magnetic field effect; (4) The lead-out line of the piston head coil is inconvenient, and sometimes it is easy to have magnetorheological changes liquid leakage problem

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