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Blade tip clearance calibration system and calibration method based on AC discharge

A technology of blade tip clearance and AC discharge, applied in the direction of using electrical devices, electromagnetic means, instruments, etc., can solve problems such as affecting flight safety, and achieve the effects of high displacement accuracy, convenient installation and use, and high efficiency.

Active Publication Date: 2019-02-19
南京科唯信智慧科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, while reducing the blade tip clearance and improving efficiency, when the working state of the engine changes when the blade tip clearance is too small, it may be caused by the change of blade load, the deformation of the casing, and the inconsistent thermal expansion of the rotor blade and the casing. Rubbing of Jingzi affects flight safety

Method used

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  • Blade tip clearance calibration system and calibration method based on AC discharge
  • Blade tip clearance calibration system and calibration method based on AC discharge
  • Blade tip clearance calibration system and calibration method based on AC discharge

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Embodiment Construction

[0022] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0023] Such as Figure 4 As shown, the present invention provides a blade tip clearance calibration system based on AC discharge, including a voltage output module 1, a probe 6, an actuator 2, a current measurement conversion module and a central processing control module 14, wherein the actuator 2 includes a step Enter the motor control circuit 3, the stepping motor 4 and the ball screw 5, the stepping motor 4 is connected to the driving end of the ball screw 5, the stepping motor control circuit 3 controls the rotation of the stepping motor 4, thereby pushing the ball screw 5 Move; the tip of the probe 6 is inserted into the casing 9 from the outside of the casing 9, and cooperates with figure 1 and figure 2 As shown, and make the tip of the probe 6 flush with the inner wall of the casing 9, and wrap the insulating layer 10 at the part...

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Abstract

The invention discloses a blade tip clearance calibration system based on alternating current discharge. The tip of a probe is flush with the inner wall of a casing. The bottom end of the probe is fixed on one side of a ball screw and moves with the ball screw. The invention further discloses a blade tip clearance calibration method based on alternating current discharge. The method comprises the steps that 1 the probe is moved from the inner wall of the casing to a position contacts a blade tip to measure the distance between the casing and the blade tip; 2 the probe is moved straightly to the outside, and the radial distance di between the probe and the blade tip is adjusted to measure the discharge starting voltage Ui of the probe and the blade tip to complete relationship calibration of the discharge starting voltage and the blade tip clearance of a single blade. The scheme is simple to operate, and can be used for the actual measurement of the blade tip clearance. The clearance calibration of each blade is realized. The measurement accuracy is improved.

Description

technical field [0001] The invention belongs to the field of blade clearance measurement, and in particular relates to a blade tip clearance calibration system and calibration method based on AC discharge, which can be used for actual blade tip clearance measurement. Background technique [0002] The distance between the tips of the rotor blades of an aeroengine and the inner wall of the case is called the tip clearance, which is an important parameter affecting the performance and efficiency of the engine. With the development of modern aviation methods, the requirements for engine performance continue to increase, and reducing the engine tip clearance has become one of the important means to improve engine performance. Reducing the tip clearance of the engine can reduce the leakage of the working medium and reduce the loss of the end wall, thereby further improving the performance of the engine. However, while reducing the blade tip clearance and improving efficiency, whe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/14
CPCG01B7/14
Inventor 于兵申恩玉袁培王继强胡忠志舒文君
Owner 南京科唯信智慧科技有限公司
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