Piezoelectric energy harvesting bearing used for rotating machines

Abstract

The invention discloses a piezoelectric energy harvesting bearing used for rotating machines. The bearing comprises a bearing body, springs, mass blocks, a support, piezoelectric stacks and a shell are sequentially arranged along the radial direction of the bearing body, the springs are uniformly distributed along the circumferential direction of the bearing body, the springs are connected with the mass blocks, the support is arranged on the mass blocks, the support is annular in shape, the piezoelectric stacks and the mass blocks are arranged at two sides of the support at intervals, and the piezoelectric stacks are uniformly arranged on the inner wall of the shell along the circumferential direction of the shell. The piezoelectric energy harvesting bearing can effectively convert the vibration energy of a rotor and output a stable current which is supplied to an electrical device for work or is stored in a battery to meet the short-time work energy consumption of the device; a mass tuning device designed in the invention has an overload protection effect on the piezoelectric stacks, isolate the noise influences caused by the rotor, and reduces the complexity of an energy storage circuit; and the piezoelectric energy harvesting bearing has a simple and reasonable construction, guarantees and even enhances the use functions of a routine bearing, and ensures the safety and the reliability of a whole apparatus.

Description

technical field [0001] The invention belongs to the technical field of machinery and electronics, and in particular relates to a piezoelectric energy-harvesting bearing used in rotating mechanical equipment. Background technique [0002] Rotating machinery is the most widely used type of mechanical equipment in the industrial sector, such as steam turbines, compressors, fans, etc. Bearings are important components in rotating machinery, and their main function is to support the rotating body of the machine (ie, the rotor). According to the different friction properties of moving elements, bearings can be divided into two categories: rolling bearings and sliding bearings. If the supporting or associated electrical components of rotating machinery work in nuclear radiation, toxic or corrosive environments, the installation position is not easy to maintain and operate, and the vibration energy during the operation of rotating machinery can be captured and collected to supply s...

AI Technical Summary

Problems solved by technology

When the rotor is running, under the action of the unbalanced force caused by the eccentricity, the rotor has a single-cycle or multi-cycle vibration with the speed as the fundamental frequency. Most of these vibration energy are dissipated in the form of heat energy and have not been fully recycled.

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