Self-powered monitoring rolling bearing

Abstract

The invention relates to a self-powered monitoring rolling bearing, and belongs to the technical field of bearing monitoring and new energy. A partition plate on the inner wall of an outer ring divides the inner cavity of the outer ring into a left cavity and a right cavity, a circuit board and a sensor are installed on the partition plate, and the circuit board is arranged in the left cavity; anend cover is arranged at the end part of the left cavity and is used for pressing a positioning ring with upper and lower clamping grooves into the left cavity; an inner ring is mounted in the right cavity through a first rolling body; a half shaft is arranged at one end of a pendulum shaft, and a large plummer block and a small plummer block which are coaxial are arranged at the other end of thependulum shaft; a shaft inclination angle is formed between the inclined axis of the half shaft and the horizontal axis of the small plummer block; the large plummer block and the plummer block blockof the pendulum shaft are sleeved with an inner hole of the partition plate and an inner hole of the inner ring respectively, the large plummer block is connected with the inner ring, and the partition plate is arranged between a shaft shoulder and the inner ring; a pendulum ring is installed on the half shaft through a second rolling body, and when the half shaft rotates, the pendulum ring swingsaround the axial direction of the half shaft; and a piezoelectric vibrator is arranged on the outer edge of the pendulum ring, the piezoelectric vibrator and the sensor are connected with the circuitboard, and the free end of a piezoelectric vibrator is arranged in an upper clamping groove and a lower clamping groove of a positioning ring.

Description

technical field [0001] The invention belongs to the technical field of bearing monitoring and new energy, and in particular relates to a self-powered monitoring rolling bearing. Background technique [0002] Bearings are indispensable standard parts in the fields of machinery, vehicles, aerospace, ships and energy, and are also one of the most vulnerable parts in related transmission systems. 30% of the failures in rotating machinery are caused by bearing failure. Therefore, bearing condition monitoring and early fault diagnosis have attracted people's attention. On-line monitoring has gradually become the prerequisite for reliable operation of medium and large bearings in the fields of generators, ships, high-speed rail, and aircraft. The monitoring indicators involve 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 signal source was relatively long, and...

AI Technical Summary

Problems solved by technology

In recent years, people have successively proposed different forms of embedded bearing monitoring systems, which have better solved the problem of measurement accuracy and accuracy, but the structure of related equipment needs to be changed in order to install the sensor monitoring system, which not only easily causes damage to equipment parts. Problems such as stress concentration cannot be realized on some equipment with complex structure or limited space; the most critical thing is that when the monitoring system needs to rotate with the inner and outer rings of the bearing, it is inconvenient to supply power through wires, and the use of battery power supply is very short.

Therefore, the existing bearing monitoring system is basically a regular and indirect non-contact measurement, and it is difficult to obtain the running status of the bearing in a timely and accurate manner.

In view of this, various forms of self-monitoring bearings based on magnetic coupling excitation power generation and power supply have been proposed. The biggest problems are: the existence of magnetic interference, large differences in power generation performance at different speeds, narrow effective frequency bands, and low reliability.

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