A swirl excitation generator used for power supply of wind power gearbox monitoring system

Abstract

The invention relates to a rotational flow excitation power generator used for supplying power to a wind power gearbox monitoring system, and belongs to the field of piezoelectric power generation. A shell, a left shaft sleeve, a wheel flange, a right shaft sleeve and a right wall plate having an inlet are arranged on a main shaft in a sleeving manner from left to right in sequence, wherein a baffle is mounted on the end part of the main shaft; the wheel flange and the main shaft are connected through a key; an outlet is formed in the cylinder wall of the shell; the end part of the cylinder wall of the shell is connected with the right wall plate; a balancing weight block is mounted outside the cylinder wall of the shell; a limiting frame, a piezoelectric vibrator and a pressing block are mounted on the end part of the cylinder wall of the shell in sequence; the limiting frame and the piezoelectric vibrator are arranged in the inlet of the right wall plate; a piezoelectric crystal plate is mounted close to the limiting frame; the length and the width of the piezoelectric crystal plate are less than that of the cavity of the limiting frame respectively; and the length and the width of a metal substrate are greater than that of the cavity of the limiting frame respectively. The rotational flow excitation power generator has the advantages and characteristics as follows: the piezoelectric vibrator is excited by the fluid motion caused by rotation, so that rigid impact and electromagnetic interference are avoided; the piezoelectric crystal plate only bears the pressure stress within a controllable range, so that high reliability is achieved; the rotational flow excitation power generator is not required to be fixed and supported; and the rotational flow excitation power generator can be applied to both of cantilever gear shafts and multi-gear coaxial occasions.

Description

technical field [0001] The invention belongs to the technical field of gear monitoring and piezoelectric power generation, and in particular relates to a swirl excitation generator used for power supply of a wind power gearbox monitoring system. 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. Therefore, various forms of real-time monitoring systems and methods fo...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the power supply problem faced by the gear monitoring system in the existing wind power gearbox, the present invention proposes a swirl excitation generator for power supply of the wind power gearbox monitoring system

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