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Blade tip gap measuring device and method based on closed environment

A technology of tip clearance and measuring device, which is applied to measuring devices, electrical devices, instruments, etc., can solve the problems of low measurement accuracy, inability to know the real-time value of tip clearance, etc., and achieves compact size, good technical support, and avoidance of the effect of destruction

Pending Publication Date: 2020-06-16
善测(天津)科技有限公司
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AI Technical Summary

Problems solved by technology

This method is relatively simple to implement, the cost is small, and it will not cause any damage to the rotating machinery, but the measurement accuracy is low, and it can only measure the minimum clearance value of the entire working process of the first-stage blade, and it can only be measured when starting and stopping. Unable to know the real-time value of tip clearance

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  • Blade tip gap measuring device and method based on closed environment
  • Blade tip gap measuring device and method based on closed environment
  • Blade tip gap measuring device and method based on closed environment

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Embodiment Construction

[0042] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0043] The blade tip clearance measurement device 1 provided by the present invention based on a closed environment can be nested and installed on the rotor blade 2 to be detected, such as figure 1 shown. The top of the tip clearance measuring device 1 is a capacitive sensor 3, adjust the radial relative position of the tip clearance measuring device 1, so that the capacitive sensor 3 is just placed on the top of the rotor blade 2 to be tested, and try to ensure that the polar plate of the capacitive sensor 3 is in contact with the rotor. The tops of the blades 2 are parallel. After the position of the blade tip clearance measuring device 1 is determined, it is fixed on the rotor bl...

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Abstract

The invention discloses a blade tip gap measuring device and method based on a closed environment. The blade tip gap measuring device is used for being installed on a rotor blade needing to be detected in a nested mode. The rotor blade is positioned in a casing; the blade tip gap measuring device comprises a capacitance sensor, a detection circuit unit, a wireless transmission module, a power supply battery and a fastening device; the capacitance sensor is arranged at the top of the blade tip gap measuring device, and the radial position of the blade tip gap measuring device is adjusted by adjusting the fastening device, so that a polar plate of the capacitance sensor is parallel to the top end of the rotor blade; the capacitive sensor, the detection circuit unit and the wireless transmission module are connected in sequence; and the power supply battery is used for providing electric energy required by the blade tip gap measuring device.

Description

technical field [0001] The invention relates to the field of blade tip clearance measurement, in particular to a blade tip clearance measurement device and method based on a closed environment. Background technique [0002] In rotating machinery such as aero-engines, gas turbines, and steam turbines, the tiny distance between the top of the rotor blade and the inner wall of the casing is called tip clearance, which is one of the important parameters affecting the performance of rotating machinery. Reducing the tip clearance can reduce the fuel consumption rate and significantly improve the operating efficiency of the rotating machine, but too small tip clearance value will lead to friction between the blade and the casing, which seriously endangers the safety of the rotating machine. Therefore, the tip clearance measurement technology is of great significance to improve the performance of rotating machinery and ensure the safe operation of rotating machinery. [0003] At pr...

Claims

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Application Information

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IPC IPC(8): G01B7/14G08C17/02
CPCG01B7/14G08C17/02
Inventor 李杨宗段发阶叶德超李芳怡
Owner 善测(天津)科技有限公司