Self-sensing tapered roller bearings for wind turbines

Abstract

The invention relates to a self-sensing conical roller bearing for a wind driven generator, and belongs to the technical field of bearings and monitoring thereof. Excitation magnets are embedded into the left end of an inner ring and the right end of an outer ring; a right disk and a left disk are respectively arranged on a stepped shaft of the inner ring and in a stepped hole in the outer ring; a stepped ring slot and a guide hole are formed in the right disk and the left disk; a right pressing plate and a left pressing plate are respectively arranged on the right disk and the left disk; limiting surfaces are arranged on the pressing plates; piezoelectric vibrators are pressed between the left and right disks and the pressing plates; metal substrates on the piezoelectric vibrators are in contact with arc limiting surfaces; excited magnets are arranged at the free ends of the piezoelectric vibrators and are arranged in the guide hole; a circuit board and a sensor are mounted in a ladder ring slot. The self-sensing conical roller bearing has the advantages that an automatic power supplying, sensing and monitoring function is realized; the structure of mounting equipment is not required to be changed; true real-time and on-line monitoring is realized; configuration parameters of the structures of the piezoelectric vibrators and the excitation magnets are reasonably determined, so that the power supply and generation capacity is high; due to the guide hole and the limiting measure, the reliability is high.

Description

technical field [0001] The invention belongs to the technical field of bearings and monitoring thereof, and in particular relates to a self-sensing tapered roller bearing for wind power generators. Background technique [0002] Bearing is a typical mechanical basic part, which is widely used in the fields of machinery, vehicles, aerospace, ships and energy; however, bearing is also one of the most vulnerable parts in rotating machines, and 30% of rotating machinery failures % is caused by bearing failure. Therefore, the state monitoring and early fault diagnosis of bearings have attracted people's attention. On-line monitoring of bearing status has gradually become an indispensable technology in the fields of large generators, ships, high-speed rail, and aircraft. The indicators to be monitored include temperature, vibration, speed, and noise. Early bearing monitoring systems were mainly plug-in. One of the disadvantages was that the distance between the sensor and the sig...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a self-sensing tapered roller bearing for wind power generators to solve the problem that the existing bearing monitoring system is still non-real-time and indirect non-contact measurement in practical applications, and it is difficult to obtain the operation of the bearing in a timely and accurate manner. status problem

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