Blade vibration monitoring test device with continuously adjustable sensor installation angle

Abstract

The invention discloses a blade vibration monitoring test device with a continuously adjustable sensor installation angle. The blade vibration monitoring test device comprises a high-speed motor protection device, an operating platform, an impeller protective cover, a sensor bracket, a vibration excitation device and a strain slip ring. A noncontact blade vibration measurement method is used, thearrival time of a blade is obtained by a blade top sensor, and the vibration information of the blade is analyzed by a blade tip timing principle. Different from a conventional sensor installation method where the intersection angle and the number of sensors are fixed, the number and the installation angle of the sensors of the test device are continuously adjustable, and the accuracy of the installation angle can be 0.05 degree. Thus, the blade vibration monitoring test device solves the limitation on the number and the distribution of the sensors in practical application, and a measurement problem caused by the possible sudden failure of individual sensors in practical application, and has great significance in the research of high-speed rotating blade vibration real-time monitoring technology.

Description

technical field [0001] The invention relates to the technical field of high-speed rotating blade vibration measurement and real-time monitoring, in particular to a device for non-contact blade vibration measurement and real-time monitoring test research. Background technique [0002] Large rotating machinery mainly includes aero engines, flue gas turbines, steam turbines, blowers, etc., which are key equipment widely used in industrial systems such as aviation, ships, electric power, petrochemicals, and metallurgy. [0003] As the core component of large rotating machinery, the blade is an important guarantee for the safe operation of the equipment and the improvement of efficiency. The rotation of the blade is particularly important, and its health directly determines the efficient, safe and stable operation of the unit. Due to the complexity of the actual operating state of the blade, in order to ensure the safety of the blade during operation, real-time monitoring method...

AI Technical Summary

Problems solved by technology

However, there are certain restrictions on the number and distribution of sensors in practical applications, and the installation conditions of sensors are difficult to meet the requirements of one of the above installation methods, and some of the sensors may suddenly fail, which will seriously affect the accuracy of monitoring

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