A rotary self-excited circular piezoelectric vibrator generator

Abstract

The present invention relates to a rotary wheel self-exciting circle piezoelectric vibrator generator, belonging to the piezoelectric generation field. A gear shaft is arranged in a disc body central hole, one side of the disc body central hole is provided with a sink cavity and a guide hole, and the other side of the disc body central hole is provided with a slideway; the end of the slideway is provided with a side plate which is connected with the gear shaft; the side plate is provided with the sink cavity and the guide hole; the sink cavity of the disc body and the sink cavity of the side plate are internally provided with piezoelectric vibrators, the centers of the piezoelectric vibrators are provided with excited magnets which are located in the disc body or the guide hole of the side plate; a cylindrical exciter which has two sides being laid with the excited magnets is arranged in the slideway being filled with lubricating oil; and when the number of the exciters is larger than 1, an isolator can be installed between two adjacent exciters. The rotary wheel self-exciting circle piezoelectric vibrator generator does not need the external fixing and support, is simple in structure, small the rotation force of the exciters, easy to regulate the excitation time and large in the effective rotation speed range; the structure parameters of the piezoelectric vibrators are reasonable, and the generation capacity is large; and moreover, the bearing pressure stress excitation and the reliability of the piezoelectric wafer are high, and the rotary wheel self-exciting circle piezoelectric vibrator generator can be taken as a standard piece for the cantilever shaft gear and multi-gear coaxial occasions.

Description

technical field [0001] The invention belongs to the technical field of new energy and power generation, and specifically relates to a runner self-excited circular piezoelectric vibrator generator, which is used for power supply for monitoring systems of electric rotating facilities such as wind power gearboxes. Background technique [0002] The gearbox is a key component of a wind turbine, and its function is to transmit power. When the wind turbine is running normally, the speed of the wind rotor is low, resulting in low efficiency of the generator. Therefore, it is necessary to increase the power generation capacity and efficiency through the gearbox. Because the wind power gearbox works in a variable speed and variable load environment, it is prone to failure; in addition, when the wind power gearbox fails, it is difficult to repair and the cost is high. The operation and maintenance cost of the wind power gearbox can be as high as 30% of the overall operating cost. Ther...

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Problems solved by technology

[0003] For the monitoring of gears and shafts, the ideal method is to install various sensor monitoring systems on or close to the gears or shafts, so as to realize direct online monitoring of their operating status; It is difficult to popularize and apply the reliable and sufficient power supply for the sensor monitoring system because: ① gears and shafts are in a state of rotating motion and cannot be powered by cables; ② if battery power is used, the battery needs to be replaced frequently due to its limited service life , when the battery power is insufficient and not replaced in time, it will not be able to achieve effective monitoring; ③When the cantilever shaft far away from the bearing seat and its end gear and multiple gears are coaxial, the relative movement between the rotating gear or the shaft and the fixed support cannot be achieved. Constructing Micro Generators

Limited to the energy supply problem of the monitoring system for wind power gearbox gears and shafts, real-time online monitoring in the true sense cannot be realized at present.

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