Air inlet casing of high-pressure turbine blade vibration stress dynamic measurement core machine tester

Abstract

The invention discloses an air inlet casing of a high-pressure turbine blade vibration stress dynamic test core machine tester, which comprises an air inlet casing outer ring, an air inlet casing inner ring and hollow connecting support plates, the air inlet casing outer ring is arranged outside the air inlet casing inner ring, and the air inlet casing outer ring and the air inlet casing inner ring are connected through the connecting support plates which are uniformly distributed in the circumferential direction. The connecting support plate is a hollow support plate, the slip ring electricity leading device is arranged in an inner cavity of the air inlet casing inner ring, and a lead connected to the slip ring electricity leading device penetrates out of the connecting support plate. The front end of an air inlet casing is connected with a test bed pipeline, and the rear end of the air inlet casing is connected with an intermediate casing of a core engine tester to provide an air inlet channel for the tester; the inner annular cavity of the air inlet casing can meet the requirement for installation of the electricity guiding device on the tester and meet the measurement requirement for dynamic measurement of the vibration stress of the high-pressure turbine blade. And the hollow support plate provides a channel for the cooling gas pipeline and the lead, cools the electric conduction device in a test through the cooling pipeline, and transmits test data to processing equipment through the lead.

Description

technical field [0001] The invention belongs to the technical field of turbo ramjet engines, and relates to an intake case of a high-pressure turbine blade vibration stress dynamic measurement core machine tester. Background technique [0002] The basic principle of the vibration stress measurement of the turbine blade is: paste the strain gauge on the surface of the blade, under the working state of the high-pressure turbine, use the lead wire to output the vibration signal to the test system through the slip ring lead, and directly obtain the vibration stress of the blade when it rotates. Due to the complex structure of the twin-shaft turbofan engine, it is difficult and risky to carry out the dynamic measurement test of vibration stress in the complete machine state. Therefore, the core engine test is mostly used for measurement at present. The core engine is mainly composed of a compressor, a combustion chamber, and a high-pressure turbine. It does not contain an indepen...

AI Technical Summary

Problems solved by technology

Due to the complex structure of the twin-shaft turbofan engine, it is difficult and risky to carry out the dynamic measurement test of vibration stress in the complete machine state, so at present, the core engine test is mostly used for measurement

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