Dynamic Calibration Method of Turboshaft Engine Test Bench

Abstract

The invention discloses a dynamic calibration method for a turboshaft engine test bench, which comprises the following steps: step 1, check the stability of the test bench, and adjust the test bench in time by analyzing test data; step 2, check the temperature uniformity , by uniformly arranging temperature probes on the engine intake part, and timely adjusting the engine by analyzing the temperature data; Step 3, performing repetitive inspections, conducting initial performance tests and repeated performance tests on the engine, and obtaining the tests of the engine at various state points Value, compare the test values ​​of each repeated performance test to obtain the repeatability difference, and adjust the engine in time through the repeatability difference; Step 4, perform cross-calibration check, place the engine on the benchmark test bench and the test bench to be calibrated for crossover Calibration check, adjust the engine in time by obtaining cross-calibration difference data. The stability and measurement accuracy of the test bench are significantly improved, and it can be applied to 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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