Overhanging type rotating generator based on piezoelectric cantilever mutual excitation

Abstract

The invention belongs to the fields of new energy and power generation, and relates to an overhanging type rotating generator based on piezoelectric cantilever mutual excitation. A left end cover and a right end cover are arranged at two ends of a casing provided with a balancing weight, first piezoelectric vibrators are connected between the left end cover, the right end cover and the casing, wherein bearings are embedded in the left end cover and the right end cover in a pressing mode, a rotating shaft provided with a web and a wheel edge is arranged on the left end cover and the right end cover through the bearings, and second piezoelectric vibrators are fixed on two sides of the wheel edge, the end portion of each first piezoelectric vibrator and the end portion of each second piezoelectric vibrator are respectively provided with a magnet, an inner ring of an electric brush and an outer ring of the electric brush are fixed on the rotating shaft and the right end cover respectively, the first piezoelectric vibrators and the second piezoelectric vibrators are connected with the outer ring of the electric brush and the inner ring of the electric brush through a first wire set and a second wire set, and the inner ring of the electric brush is connected with a binding post on a connection disc through a third wire set. The overhanging type rotating generator based on piezoelectric cantilever mutual excitation has the advantages that the generator does not need to be externally supported and fixed, the formed generator is an independent part, a rotating body structure does not need to be changed, and the generator is convenient to install and maintain, high in reliability and strong in power generating capacity and rotating speed adaptability.

Description

technical field [0001] The invention belongs to the technical field of new energy and power generation, and specifically relates to a pendant rotating generator based on mutual excitation of piezoelectric cantilever beams, which is used for power supply of a health monitoring system without a fixedly supported rotating body. Background technique [0002] In order to meet the power supply requirements of the health monitoring system of rotating bodies such as helicopter propellers, automobile tires, aeroengines, high-speed trains, oil and gas drill spindles and their bearing components, domestic and foreign scholars have proposed various forms of rotary piezoelectric and electromagnetic micro power generation. machine. Relatively speaking, the rotary electromagnetic generator is very mature and has been widely used, but it is not suitable for powering the wireless sensor monitoring system because of the electromagnetic interference generated during the power generation proces...

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Problems solved by technology

[0005] The invention provides a pendant rotary generator based on mutual excitation of piezoelectric cantilever beams, aiming at the power supply requirements of the health monitoring system of propellers / car wheels / cantilever shafts without fixed support or whose support points are far from the shaft end, to solve the problem The problem of low power generation efficiency in existing rotary piezoelectric generators

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