Early waning method for rolling bearing of rotating machine

Abstract

The invention relates to an early waning method for a rolling bearing of a rotating machine. A vibration signal generated when the rolling bearing is stably operated is a stable low frequency signal, a signal generated in time of failure of the bearing is a high frequency pulse signal, a vibrating signal is acquired, the sudden change high frequency pulse point position in the signal is extracted by utilizing a wavelet algorithm and is output through early warning, movement of the rotating machine can be intervened in time, and safety of the rotating machine is ensured. The rolling bearing of a high speed train is monitored in real time, and safety and stability of operation of the train are effectively improved, so that early waning method has important practical significance to ensuring life safety of passengers. Vibration monitoring is conducted on a generator set of a nuclear power station, the safety factor of nuclear electricity generation is greatly improved, and nuclear leakage and pollution produced by rotating vibration are avoided. The bearing of a rotating traction mechanism in the production process is monitored in real time, production continuity of enterprises can be improved, and economic loss is avoided.

Description

technical field [0001] The invention relates to a fault judging device, in particular to an early warning method for rolling bearings of rotating machinery based on Marr wavelet and threshold judgment. Background technique [0002] In 2012, a mechanical failure occurred in a passenger car manufacturing production line, which caused a long-term interruption of the production process and caused certain economic losses. The mechanical processing equipment used in this production line mainly relies on rotating machinery to drag large loads. However, during long-term use, due to plastic deformation, uneven temperature rise, foreign particle invasion, etc., the rolling bearings will be severely worn, causing them to fail, resulting in The gears in the connected gearbox suffered severe tooth breakage, tooth surface gluing, wear and large plastic deformation, which caused devastating damage to the gearbox and caused small vibrations to the connected shafts and couplings. , As a res...

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Problems solved by technology

[0004] Aiming at the problem that rolling bearing failure is the most important mechanical failure of rotating machinery, the present invention proposes an early warning method for rolling bearings in rotating machinery. Through the online real-time monitoring and early warning scheme for rolling bearings in core rotating machinery, online diagnosis of bearing faults is realized, thereby ensuring the safety of rotating machinery. reliable operation of

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