Shipborne instrument impact resistant device combined with shape memory alloy and magnetorheological fluid

Abstract

The invention belongs to the field of ships, and discloses a shipborne instrument impact resistant device combined with shape memory alloy and magnetorheological fluid. The shipborne instrument impactresistant device comprises an electromagnetic control module and a device impedance module, wherein the device impedance module comprises a support plate, a magnetic separation sleeve, a magnetorheological fluid base solution, a filter membrane, magnetic particles, a shape memory alloy spring, a first conducting wire, a sealing ring, a second conducting wire and a shape memory alloy housing, andthe electromagnetic control module comprises a connecting frame, an upper bracket, a lower bracket, a conducting sliding blade, a conducting coil, a conducting pipe and a power supply. According to the shipborne instrument impact resistant device, an energy absorption slow release principle and a rigid blocking principle are combined and used, so that the impact resistant capability is high; the yield strength of the magnetorheological fluid is high, the response speed is high, and the magnetorheological fluid has no toxicity or peculiar smell and is not volatile, so that protected equipment cannot be damaged if the magnetorheological fluid is damaged during operation; the influence of impurity interference on the shipborne instrument impact resistant device is small, and the operating requirements in various bad conditions of ships on the ocean are met; and the shipborne instrument impact resistant device has the advantages of high reliability, easiness in scale production and convenience in assembly and replacement, and the continuous impact can be resisted.

Description

technical field [0001] The invention belongs to the field of ships, and in particular relates to a shipboard instrument anti-shock device composed of a shape memory alloy and a magnetorheological fluid. Background technique [0002] Magneto-rheological fluid, referred to as MR fluid, is a controllable fluid and is a relatively active research in smart materials. Magnetorheological fluid is a suspension formed by mixing tiny soft magnetic particles with high magnetic permeability and low magnetic hysteresis and non-magnetic liquid. This kind of suspension exhibits low-viscosity Newtonian fluid characteristics under the condition of zero magnetic field; while under the action of strong magnetic field, it presents high-viscosity, low-fluidity Bingham fluid characteristics. [0003] In 1948, Rabinow first proposed the concept of magnetorheological fluid. It is a suspension formed by dispersing micron-sized magnetically polarized particles in a non-magnetic liquid. In the case...

AI Technical Summary

Problems solved by technology

However, the application principle of the existing protection technology is too single, and it is rare to combine several directions for application, and it is difficult to make breakthroughs in leaps and bounds.

At present, the application of magnetorheological fluids is limited to small shock absorbers installed in the transportation and aerospace fields, and the solid-like properties of magnetorheological fluids under the action of a magnetic field are not fully applied, especially in navigation. There are even fewer applications in the field of instrument protection technology

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