A non-contact measurement and positioning method and device for the surface temperature of a rotating blade

Abstract

The invention discloses a device for carrying out non-contact measuring and positioning on the surface temperature of rotating blades. The device mainly comprises an optical-fiber colorimetric temperature measuring system and a reflection-compensated optical-fiber displacement measuring system, wherein the optical-fiber colorimetric temperature measuring system is used for measuring the surface temperature of a rotating blade, and the reflection-compensated optical-fiber displacement measuring system is used for measuring the relative displacement variation information of the rotating blade; and the optical-fiber colorimetric temperature measuring system and the reflection-compensated optical-fiber displacement measuring system are respectively connected with a synchronous / asynchronous trigger device and a data acquisition instrument, the synchronous / asynchronous trigger device is connected to the data acquisition instrument, and the synchronous / asynchronous trigger device and the data acquisition instrument are connected with a computer. The invention also discloses a method for carrying out measuring and positioning by using the device. According to the invention, the surface temperature of a high-speed rotating blade can be measured at a high temperature, and the specific distribution position of surface temperature of the blade can be obtained, therefore, necessary data is provided for designs of the blade profile and cooling structure of the rotating blade, the temperature change characteristics can be monitored in real time online, and serious faults such as blade ablation possibly occurring in combustion gas turbines in the process of running can be prevented in advance.

Description

technical field [0001] The invention relates to a non-contact measurement and positioning method for the surface temperature of a high-temperature and high-speed rotating blade. [0002] The present invention also relates to a measurement and positioning method device for realizing the above method. Background technique [0003] As a new type of power device, gas turbine plays an extremely important role in many fields of national economy and national defense construction. In the field of land power generation, the installed capacity of gas turbine power generation equipment is increasing day by day. In the field of ship power, the research and development of high-power gas turbines has become the mainstream of development. In the field of modern aviation, gas turbines are the preferred power plant for various military and civil aircraft. As one of the key components of a gas turbine, the turbine is an important hot-end component that converts the available thermal energy o...

AI Technical Summary

Problems solved by technology

Although there are non-contact optical fiber temperature measurement systems used in foreign countries to measure the surface temperature of rotating turbine blades, they cannot locate the measured temperature.

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