Piezoelectric pump driven by tuning fork type actuator with adjustable resonant frequency

Abstract

The invention relates to a piezoelectric pump driven by a tuning fork type actuator with adjustable resonant frequency, and belongs to the technical field of piezoelectric pumps. The piezoelectric pump comprises the tuning fork type piezoelectric actuator with adjustable resonant frequency and a pair of diaphragm pumps, and the tuning fork type piezoelectric actuator comprises an inverted U-shaped tuning fork type body and piezoelectric plates which are bonded and fixed on the surface of the tuning fork type body; and the tuning fork type body is composed of a cross beam, a pair of driving arms, a mass block at the lower ends of the driving arms and an additional mass block fixedly connected to the bottom of the mass block through bolts. The piezoelectric plates are respectively arranged on the top surface and the bottom surface of the cross beam and the inner side surfaces and the outer side surfaces of the pair of driving arms to form three pairs of piezoelectric bimorph structures; and the pair of diaphragm pumps comprises two diaphragm pumps which are fixedly connected together in a back-to-back mode and are fixedly arranged between the pair of driving arms of the tuning fork type body through kidney-shaped holes and bolts. According to the piezoelectric pump, the resonant frequency of the tuning fork type piezoelectric actuator can be adjusted in a large range by changing the size of the additional mass block, so that the resonant frequency is matched with the optimal working frequency of a one-way valve, and the output performance of the piezoelectric pump is improved.

Description

technical field [0001] The invention belongs to the technical field of piezoelectric pumps, in particular to a piezoelectric pump driven by a tuning fork driver with adjustable resonance frequency. Background technique [0002] Piezoelectric pump is a new type of fluid transmission device with piezoelectric vibrator as the power element. It is the most typical type of precision fluid pump. It uses the inverse piezoelectric effect of piezoelectric elements to convert electrical energy into mechanical energy, so that Deformation is generated to drive the volume of the pump chamber to change, or the piezoelectric vibrator is used to generate fluctuations to drive the directional flow of the fluid. The piezoelectric pump integrates the driver, the pump chamber and the one-way valve, which not only overcomes the leakage and friction and wear between the relative moving parts in the traditional pump, but also reduces the energy loss between different parts. Since piezoelectric pu...

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Problems solved by technology

[0006] In order to solve the problem that the piezoelectric driver and the diaphragm pump cannot work at the optimal operating frequency at the same time due to the inconsistency of the resonance frequencies of the piezoelectric driver and the diaphragm pump in the resonant piezoelectric pump, the present invention designs a resonant frequency adjustable Piezo pump driven by tuning fork driver

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