High-temperature ultra-high-speed friction-wear testing machine for sealing coating

Abstract

The invention provides a high-temperature ultra-high-speed friction-wear testing machine for sealing coating. A motor and transmission system comprises a servo motor, a transmission system and a wheel disc, one end of the transmission system is connected with the servo motor, and the other end of the transmission system is connected with the wheel disc; the edge of the wheel disc is provided with simulation blades; a heating and cooling system comprises an air compressor, a gas control unit, a flame heating nozzle and a cooler nozzle, the air compressor is connected with the gas control unit, the gas control unit is communicated with the flame heating nozzle and the cooler nozzle through pipelines, the flame heating nozzle is arranged on the outer side of the wheel disc, and the cooler nozzle is arranged on the outer side of a feeding system; a data acquisition and control system is connected with a temperature and image acquisition device, and the temperature and image acquisition device is arranged on the outer side of the wheel disc; the feeding system is connected with the stepping motor, and a coating sample is arranged on the other side of the wheel disc. The test result provided by the invention can provide a reliable test basis for evaluation of the service performance of the sealing coating and research on high-speed friction wear behaviors and mechanisms.

Description

technical field [0001] The invention relates to the technical field of friction and wear testing, in particular to a sealing coating high-temperature and ultra-high-speed friction and wear testing machine. Background technique [0002] Sealing coating is widely used in aero-engines and ground gas turbines to seal the high-pressure turbine gas path. It is generally coated on the inner wall of the casing, which can minimize the radial gap between the rotor and the stator. Protect rotor blades from damage and damage. Evaluating the performance of the sealing coating requires a combination of various indicators, and the abradability is one of the important indicators. It is different from the wear resistance of the material, and its quantitative data is not only related to the amount of wear, but also reflects the gas path. The scraping force change, energy loss, surface state change and wear product characteristics of the sealing pair under high-speed and high-temperature cond...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a sealing coating high-temperature ultra-high-speed friction and wear testing machine, which solves the problem that the blade tip linear velocity and test temperature in the prior art cannot meet the ultra-high-speed (450m / s or more) and high-temperature sealing coating (above 1300°C), it is impossible to truly simulate the high-speed, high-temperature scraping and wear conditions of the high-pressure turbine gas path sealing coating of the gas turbine

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