Dynamic calibration method for turboshaft engine test bed

Abstract

The invention discloses a dynamic calibration method for a turboshaft engine test bed. The method includes the following steps that firstly, test bed stability inspection is conducted, and the test bed is adjusted in time by analyzing test data; secondly, temperature uniformity inspection is conducted, temperature probes are uniformly distributed on the engine intake part, and an engine is adjusted in time by analyzing temperature data; thirdly, repeatability inspection is conducted, a primary performance test and a repeatability test are carried out on the engine to obtain test values of the engine at different state points, the test values of the repeatability test are compared to obtain repeatability difference values, and the engine is adjusted in time according to the repeatability difference values; fourthly, intersection calibration inspection is conducted, the engine is placed on a reference test bed and the test bed to be calibrated respectively to be subjected to intersection calibration inspection, and the engine is adjusted in time according to obtained intersection calibration difference value data. Stability and measurement accuracy of the turboshaft engine test bed are remarkably improved, and the turboshaft engine test bed can meet strict airworthiness requirements.

Description

technical field [0001] The invention relates to the field of turboshaft engine ground calibration, in particular to a dynamic calibration method for a turboshaft engine complete machine test bench. Background technique [0002] If the engine fails during the flight, it will cause very serious problems, and may even crash. Therefore, after a certain period of use, the aircraft engine must be disassembled no matter whether it is good or bad, and then sent to the factory for maintenance. So it goes round and round until the life of the engine is terminated. The ground facility for testing aircraft engines is called an engine test bench. [0003] At present, in the construction of the turboshaft engine test bench for turboshaft engines, there are generally only qualitative requirements for the dynamic calibration of the test bench. The method of stability assessment is mostly judged by past test experience or the time of stable work. The dynamic calibration of the test bench ...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a method for dynamic calibration of a turboshaft engine test bench to solve the existing turboshaft engine test bench, which generally only has qualitative requirements for dynamic calibration of the test bench, without specific methods, processes, project contents and quantitative standards. There is also no method for judging the stable state of the test bench and evaluating the stability, which is prone to a series of use problems and brings uncertain factors to the normal operation of the aircraft.

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