Safety device with negative thermal expansion characteristic and design method thereof

Abstract

The invention discloses a safety device with a negative thermal expansion effect and a design method thereof. The safety device comprises a negative thermal expansion structure and an external circular pipe arranged outside the negative thermal expansion structure. The negative thermal expansion structure is in a circular tube shape formed by curling a negative thermal expansion plane structure, abuckle is arranged at the connecting position of an inclined rod on the negative thermal expansion structure, and the negative thermal expansion plane structure is obtained by spatial translation andmutual connection of a plurality of negative thermal expansion cell elements on a plane. Each negative thermal expansion cell element is formed by oppositely connecting two same microstructures by sharing one bottom edge, and each microstructure is an isosceles triangle formed by one bottom edge and two bevel edges; a clamping groove is formed in the pipe wall of the outer circular pipe, and whenan electronic component or a machine works normally, a buckle of the negative thermal expansion structure is arranged in the clamping groove. Before the required prevention and control temperature isreached, the circuit is cut off, and the mechanical equipment is prevented from being damaged by high temperature.

Description

technical field [0001] The invention belongs to the technical field of machinery and new materials, and relates to a safety device with negative thermal expansion characteristics and a design method thereof. Background technique [0002] In engineering applications, temperature changes cause dimensional changes, so expansion and contraction of materials and structures must be considered. The application environment of most materials will experience a range of operating temperatures, and both technical and fundamental research fields are concerned with the thermal expansion of structures caused by temperature changes. The coefficient of thermal expansion is an important physical quantity used to measure the degree to which temperature changes the size of a material. Negative thermal expansion materials have the opposite characteristics to traditional materials, exhibiting thermoelastic properties of contraction within a certain range of temperature rise. As early as 1996, L...

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Problems solved by technology

The elongation of the transverse members will cause the height of the unit to decrease in the longitudinal direction

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