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Rotating pressure calibration device and method

A technology of calibration device and calibration method, which is applied in the direction of measurement device, measurement of fluid pressure, engine test, etc., can solve the problems of low calculation accuracy, cumbersome calibration work, limited rotor speed, etc.

Inactive Publication Date: 2020-12-18
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to overcome the shortcomings of cumbersome calibration work, rotor speed limited by the radius of the turntable, and low calculation accuracy in the prior art, the present invention proposes a rotational pressure calibration device and calibration method

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  • Rotating pressure calibration device and method

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Embodiment Construction

[0064] The experimental device of this embodiment includes a turntable 1 , a stationary casing 3 , a hollow shaft 6 , a data recorder 7 , a pressure sensor 9 , a thermocouple 5 and a pressure introduction tube 11 . Wherein, the turntable 1 is set on one end of the hollow shaft 6 , and an interference fit is made between the turntable and the hollow shaft; the data recorder 7 is installed on the end surface of the other end of the hollow shaft 6 . The stationary case 3 is sleeved on the hollow rotating shaft and is located inside the turntable; the inner circumferential surface of the outer ring of the stationary case corresponds to the outer circumferential surface of the turntable, and makes the inner surface of the outer ring of the stationary case There is a gap of 0.5mm between the circumferential surface and the outer circumferential surface of the turntable, and the distance between the inner end surface of the turntable and the inner end surface of the stationary casing ...

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Abstract

The invention provides a rotating pressure calibration device and method. A rotating disc is sleeved on a hollow rotating shaft, and a pressure calibration rotating and static cavity is formed by a space between the inner end surface of the rotating disc and the inner end surface of a static casing. The rotating airflow pressure is obtained through the pressure sensor, and the rotating airflow temperature at the measuring point position is obtained through a thermocouple. A pressure calibration value in a rotating state of the rotating disc and a pressure calibration value in a static state ofthe rotating disc are acquired respectively. The difference between the statically calibrated pressure value and the pressure at the radius position of the sensor is the pressure deviation generatedby deformation of the sensor at different rotating speeds and under different pressures. According to the invention, the pressure measurement deviation caused by the deformation of the pressure sensorunder different working conditions can be conveniently obtained, the deviation value is corrected so as to improve the measurement precision of the pressure on the rotating part, an accurate measurement means is provided for related rotation experiments of an aero-engine air system, and the experiment measurement precision is ensured.

Description

technical field [0001] The invention relates to the field of aero-engine air systems, in particular to a device and method for calibrating airflow pressure on a high-speed rotating disc or in a rotating hole. Background technique [0002] At present, the increase of the thrust-to-weight ratio of the aero-engine means that the gas temperature before the turbine inlet needs to be increased accordingly, and the thrust of the engine can be increased by about 10% for every 55°C increase. The temperature before the turbine of a modern aero-engine has exceeded 2000K, which is much higher than the upper limit of the temperature resistance of the metal material of the high-temperature parts of the engine. Simply increasing the temperature resistance limit of the metal material has been difficult to meet the improvement of the engine performance, and it is more necessary to extract air from the compressor. And through the air system, including the pre-rotation system, the high-tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M15/14G01M15/02G01L27/00
CPCG01M15/14G01M15/02G01L27/005
Inventor 刘高文雷昭王俊凇宋月龙李鹏飞
Owner NORTHWESTERN POLYTECHNICAL UNIV
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