High-speed cylindrical roller bearing and integrated monitoring device thereof

Abstract

The invention relates to a high-speed cylindrical roller bearing and an integrated monitoring device of the high-speed cylindrical roller bearing and belongs to the technical field of bearings and monitoring technologies of the bearings. A movable disc and a fixed disc are installed on an inner ring and an outer ring of the bearing respectively. A cantilever beam type piezoelectric vibrator is connected between the inner ring and the movable disc in a pressing mode, and a cantilever beam type piezoelectric vibrator is connected between the outer ring and the fixed disc in a pressing mode. Excited magnets are installed at the free ends of the piezoelectric vibrators. The movable disc and the fixed disc are respectively provided with a circuit board and different types of sensors. An excitation disc and holders are installed in a riveted mode. Limiting balls are arranged between the excitation disc and the inner surface of the outer ring. An excitation magnet is installed on the excitation disc. The integrated monitoring device has the advantages that the monitoring device and the bearing are integrated, and the integrated monitoring device has a self-energy-supplying sensing monitoring function and can be used as an independent component without changing the equipment structure; the piezoelectric vibrators are excited based on a differential motion principle, and kinetic energy and generating capacity obtained by the piezoelectric vibrators can be effectively increased at the time of high speed; the structure size of the piezoelectric vibrators and the arrangement of the excitation magnet are reasonable, piezoelectric plates only bear pressure stress without twisting, and reliability is high.

Description

technical field [0001] The invention belongs to the technical field of rolling bearings and monitoring thereof, and in particular relates to a high-speed cylindrical roller bearing and an integrated monitoring device thereof. 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 be...

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Problems solved by technology

[0004] The present invention provides a high-speed cylindrical roller bearing and its integrated monitoring device to solve the problems existing in the actual application of the existing bearing monitoring system and related piezoelectric power generation devices when the rotating speed is high, and the rotating magnet and the piezoelectric vibrator end The overlapping time between the external magnets is extremely short, and it is difficult for the piezoelectric vibrator to obtain enough kinetic energy to make it vibrate and generate electricity

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