Surface temperature detection system for rotation part in high-temperature high-pressure container

Abstract

The invention discloses a surface temperature detection system for a rotation part in a high-temperature high-pressure container, relating to a temperature detection technology. The surface temperature detection system is structurally characterized in that an infrared window and sealing interface assembly (10) is connected onto a pressure container wall (80), and the infrared window and sealing interface assembly (10), an infrared high-temperature optical fiber (20), an infrared temperature measuring module (30), a signal cable (70) and a computer (40) are sequentially connected; and the infrared window and sealing interface assembly (10) is spatially opposite to a rotating body (50) through an infrared radiation optical path (60). The surface temperature detection system can be used for accurately measuring the surface temperature of an object within a wider intermediate-high temperature range of 250-750 DEG C, measuring the surface temperature of a rotating object in a high-temperature high-pressure container, eliminating the influence on infrared temperature measurement by emissivity variation caused by surface property variation of an object to be measured to a larger extent after the object to be measured runs for a long time.

Description

technical field [0001] The invention relates to a temperature detection technology, in particular to a surface temperature detection system for rotating parts in a high-temperature and high-pressure (such as supercritical water vapor medium) container. Specifically, it is an online detection system that can be applied to the surface temperature of the rotor in the cylinder of a supercritical steam turbine. The system can be reliable under the condition of water vapor with supercritical parameters within a wide range of pressure in the cylinder of 22.2-33MPa and temperature of 250-750°C. Working, online monitoring of the rotor temperature in the cylinder, it can also be used to detect the surface temperature of the rotating object in the container under other similar work requirements. Background technique [0002] The sustained, rapid and healthy development of the power industry is the basis and guarantee for my country's social and economic development; at the same time, d...

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Problems solved by technology

However, the working pressure parameters of aeroengines are far lower than the working parameters of supercritical water vapor, and the higher temperature parameters are very conducive to temperature measurement with colorimetric infrared radiation; The temperature range from 250°C to 700°C is too low for the dual-band colorimetric temperature measurement method, and is greatly affected by the emissivity for the single-band infrared temperature measurement method. It is difficult to measure temperature accurately by using infrared temperature measurement method

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