Method for measuring pressure in rotating state

Abstract

The invention discloses a method for measuring pressure in a rotating state. The method comprises: installing a demarcating device on a test piece to form a pressure-tight demarcating chamber, feeding gas into the demarcating chamber, measuring voltage signal values of a sensor and gas pressure values of the corresponding chamber, fitting a curve to obtain a pressure calibration curve in a stationary state; feeding gases with different pressures in the demarcating chamber and rotating the test piece at different rotating speed, measuring the voltage signal values of the sensor corresponding the gas pressure in the present demarcating chamber under each rotating speed, fitting a curve to obtain a pressure calibration curve in the rotating state; obtaining an actual pressure value of the demarcating chamber through temperature of the demarcating chamber under each rotating speed, and modifying the pressure calibration curve in the rotating state; and combining the modified calibration curve and the signal values under each rotating speed measured by the pressure sensor in a test condition to obtain an actual pressure value of the pressure sensor. The method for measuring pressure in the rotating state makes test results capable of being reference, and ensures measuring precision of the test at the same time.

Description

technical field [0001] The present invention relates to the field of pressure measurement. Specifically, the strain gauge pressure sensor is calibrated in the rotating state to obtain the calibration curve of the corresponding relationship between the output signal of the sensor and the actual pressure value at different speeds. Using the calibration curve, the rotation can be accurately measured. It is especially suitable for pressure measurement of rotating parts such as aeroengine turbine disks. Background technique [0002] With the advancement of technology, increasing the gas temperature before the turbine has become an important way to improve the performance of modern aero-engines, but at the same time it will also cause negative effects such as excessive heat load on the turbine disk. In order to ensure the safe and reliable operation of the turbine, in addition to improving the turbine material, the cooling of the turbine disk is also very important. In order to i...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems existing in the prior art, the present invention proposes a pressure measurement method in a rotating state that is easy to operate and whose precision is easy to ensure, and overcomes the gas in the dynamic and static interfaces or pressure-taking tubes, pressure-taking plates and other equipment that exist during the measurement process. Leakage problem, calibrate the strain gauge pressure sensor in the rotating state to obtain the calibration curve of the corresponding relationship between the sensor output signal and the actual pressure value at different speeds, and use the calibration curve to obtain the accurate pressure in the rotating state

Images