Apparatus for measuring consistency of thermal deformation and deformation force of thermal bimetallic strip

Abstract

The invention relates to an apparatus for measuring consistency of thermal deformation and deformation force of a thermal bimetallic strip, which belongs to the field of precise instruments. The apparatus for measuring consistency of thermal deformation and deformation force of the thermal bimetallic strip comprises: a horizontal mounting table with a horizontal adjusting function; a high temperature thermotank located below the horizontal mounting table; a rotary table arranged below the horizontal mounting table in a suspended way through a main shaft and extending into the high temperature thermotank, wherein a plurality of centrosymmetric positioning clamps used for clamping the thermal bimetallic strip are arranged along the circumference of the rotary table and a rotary motor connected with the main shaft is arranged on the horizontal mounting table; a thermal deformation force measuring mechanism and a flexibility measuring mechanism arranged on the horizontal mounting table and respectively located at two sides of the main shaft; and U-shaped grooves arranged on the upper surfaces of the horizontal mounting table and the high temperature thermotank at positions corresponding to the thermal deformation force measuring mechanism and the flexibility measuring mechanism. The apparatus provided by the invention has the advantages of scientific measurement, small errors of testing results and high testing efficiency.

Description

technical field [0001] The invention relates to a measuring device, in particular to a device for measuring the thermal deformation and deformation force consistency of a thermal bimetal sheet. Background technique [0002] Facing the current situation of global energy shortage, countries have successively proposed the concept of "smart grid". The goal of my country's "smart grid" is to "ensure the safety, reliability and economy of power supply". The circuit breaker is used as a power grid breaking and protection device, and the thermal bimetal is the core component of the thermal tripping mechanism of the circuit breaker. The inconsistency between the deformation and the deformation force of the thermal bimetal directly affects the safety, reliability and economy of the circuit breaker. On the one hand, it reduces the qualification rate of the products of the thermal bimetal sheet manufacturers; on the other hand, when the circuit breaker manufacturers test the circuit b...

AI Technical Summary

Problems solved by technology

[0004] The oil tank contact measurement method has the advantages of uniform temperature distribution in the temperature field, but the temperature rise and fall test will cause thermal deformation of the displacement transmission rod, and the temperature change will cause the oil viscosity to change, resulting in a change in the buoyancy of the displacement transmission rod in the oil. The friction force between the transmission rod positioning brackets will also change

From the above factors, it can be seen that the multi-force coupling caused by the force and deformation of the transmission rod caused by temperature changes will lead to excessive measurement errors and accuracy stability

In addition, the oil medium in the oil tank needs to be replaced frequently; the contact measuring device of the oil tank is not only inefficient, but also needs to be re-calibrated every time the oil is changed

Images