A device for measuring thermal deformation and deformation force consistency of thermal bimetal

Abstract

The invention relates to a device for measuring the thermal deformation and deformation force consistency of a thermal bimetal sheet, which belongs to the field of precision instruments. A device for measuring the thermal deformation and deformation force consistency of a hot bimetal sheet, comprising: a horizontal installation platform with a level adjustment function; a high-temperature constant temperature box arranged under the horizontal installation platform; and set under the horizontal installation platform through a spindle suspended in the air And extend into the turntable in the high-temperature constant temperature box, along the circumference of the turntable, there are several center-symmetrical positioning fixtures for clamping the hot bimetallic sheet, and a rotating motor connected to the main shaft is arranged on the horizontal installation platform; it is installed in the horizontal installation The thermal deformation force measurement mechanism and the deflection measurement mechanism respectively located on the two sides of the main shaft on the platform; the upper surface of the horizontal installation platform and the high temperature constant temperature box are all provided with Us corresponding to the positions of the thermal deformation force measurement mechanism and the deflection measurement mechanism. Groove. The measurement of the invention is more scientific, the error of the test result is small, and the test efficiency is high.

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] Faced with 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 circu...

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

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