Design of A New Type Thrust Measuring System for Micro-turbojet Engine

摘要

In order to measure thrust of the micro-turbojet engine accurately, a new type of thrust measurement system was designed. The measuring system includes test bench, load cells, data acquisition modules and computer. The test bench utilizes a suspended test bed, which is different from the test bench supported by springs for aero-engine. It has simple structure and is easy to install and debug. The errors of the measuring system are analyzed from the influence factors of the thrust line and the error of the test instrument. At last, the axial loading static calibration method of the measuring system is introduced. Calibration results show that the thrust measuring system can achieve accuracy of ±0.33%, which is satisfied with the requirement of the test.