Method and device for automatically and synchronously positioning high-speed rotating blades

Abstract

The invention mainly relates to the field of non-contact large rotary mechanical high-speed rotating blade parameter measurement technologies and intelligent fault diagnosis systems, in particular to a method for automatically and synchronously positioning the high speed blades \by directly transforming and matching signals output by the conventional non-contact sensor. The method is suitable for a parameter non-contact online measurement system for most of rotary mechanical rotor blades. In order to fulfill the aim, the technical scheme provided by the invention is that: a device for automatically and synchronously positioning the high-speed rotating blades comprises a non-contact sensor for measuring a blade arrival signal, a high-precision blade tip timing module for receiving the signal output by the non-contact sensor to obtain a blade arrival time sequence {t}, and a signal processing module for performing algorithm transformation to obtain an included angle sequence {phi}. The method and the device are mainly applied to large rotary mechanical high-speed rotating blade parameter measurement occasions.

Description

technical field [0001] The invention mainly relates to the field of non-contact large-scale rotating machinery high-speed rotating blade parameter measurement technology and an intelligent fault diagnosis system. The invention relates to a corresponding matching method between blade parameters measured by the measurement system and specific blades. Specifically, it relates to a method and a device for automatic synchronous positioning of high-speed rotating blades. Background technique [0002] Aeroengines, gas turbines, steam turbines, flue gas turbines, blowers and other large rotating machinery are key equipment in aviation, ship, electric power, petrochemical, metallurgical and other systems. As the core component of the rotor of a large rotating machine, the blade itself vibrates and changes in various operating parameters (such as blade tip clearance) caused by the vibration of the rotor affect the normal operation and work efficiency of the entire system. Real-time m...

AI Technical Summary

Problems solved by technology

[0003] Usually, the non-contact rotating machinery blade parameter measurement system needs to add a synchronous sensor to monitor the rotating shaft or make a synchronous mark on a certain blade, and use the synchronous signal as a reference to distinguish the one-to-one correspondence between the measurement information and the actual blade, otherwise It weakens the role that the measurement system can play, and even makes the system not work properly [5-9]

On the other hand, the harsh working conditions of some large-scale machinery do not allow manual modification or addition of accessories to the shaft or blade, which limits the wide use of the measurement system to a certain extent.

Images