Brush seal dynamic temperature field measurement device

Abstract

The invention provides a brush seal dynamic temperature field measurement device, which comprises a base, a rotating shaft, a seal object, a mounting seat, an air supply device, an infrared imager anda computer, wherein the mounting seat, a brush seal test piece, the brush seal object and the brush seal assistant test piece form an annular high-pressure cavity; the air supply device is used for supplying air with different temperature and pressure to the high-pressure cavity to simulate different working conditions of the brush seal test piece; the infrared imager measures the whole temperature field of the brush seal test piece at a first position, and measures the highest temperature at the contact position between the brush seal test piece and the outer ring friction surface of the seal object at a second position; and the computer is used for processing data of the infrared imager. The measurement device can dynamically measure the brush seal temperature field, and changes of thetemperature field can be tracked in real time.

Description

technical field [0001] The invention relates to a brush seal dynamic temperature field measuring device for measuring the temperature of a brush seal structure of an aero-engine. Background technique [0002] Brush seal is a new type of sealing technology in the field of aero-engine. The brush seal is a contact seal. The heat generated by the intense friction between the brush wire and the rotor will seriously affect the performance and life of the brush seal, and even cause sintering at high temperature to cause the seal to fail. Therefore, when the brush seal is dynamic (Under working conditions) the distribution measurement of the temperature field is very important. [0003] At present, when measuring the temperature of the brush seal in the working state, there are mainly two temperature measurement methods: one is to place the thermocouple node on the front / rear baffle, and when the brush seal is working, its position remains static, because the node There is a tempe...

AI Technical Summary

Problems solved by technology

[0003] At present, when measuring the temperature of the brush seal in the working state, there are mainly two temperature measurement methods: one is to place the thermocouple node on the front / rear baffle, and when the brush seal is working, its position remains static, because the node There is a temperature difference with the end of the brush filament, so the temperature measured by this method cannot correctly reflect the real temperature of the brush filament when it is dynamic; the second is to bond the thermistor to the wear-resistant coating near the brush filament bundle, but with the As the rotation speed increases, the resistor sheet cannot continue to attach to the rotor, so this temperature measurement method can only measure the temperature of the rotor at static or low speed.

[0004] In addition, the current measurement of temperature is the temperature value of a certain point at a certain time, and the distribution of the temperature field in a certain area at a certain time cannot be obtained, nor can the temperature of the observation point be changed due to changes in the working environment within a certain period of time. The resulting dynamic changes

[0005] Since the brush filament area is a filament bundle composed of individual filaments, its shape will change with the change of working conditions during work, and the temperature of the brush filament will decrease radially from the friction surface. At present, the brush seal The temperature field distribution of the overall brush seal during the working process has not yet been obtained.

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