Valveless piezoelectric pump
A valveless piezoelectric pump and piezoelectric pump technology, applied in the field of hydraulic pumps, can solve problems such as weakened energy supply, reduced boundary layer flow velocity, and backflow vortices, and achieve the effect of improving stability
Active Publication Date: 2019-06-28
GUANGZHOU UNIVERSITY
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Problems solved by technology
[0004] Based on this, the object of the present invention is to provide a valveless piezoelectric pump to solve the problem of weakening the energy supply of the boundary layer flow due to the pressurization and deceleration movement of the fluid mainstream area of the valveless piezoelectric pump in the prior art, resulting in the The flow rate is reduced or even zero, resulting in backflow vortices and other phenomena, reducing the stability and safety of fluid delivery
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[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0025] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom" etc. Orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in...
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The invention provides a valveless piezoelectric pump. The pump comprises a piezoelectric pump body, an electric control system, a first flow tube and a second flow tube, wherein the piezoelectric pump body is provided with a pump cavity, a piezoelectric vibrator is arranged in the pump cavity, the piezoelectric vibrator is electrically connected with the electric control system, the first flow tube and the second flow tube are both variable-diameter tubes, the two ends of the variable-diameter tubes are opened, and the first flow tube and the second flow tube are arranged on the piezoelectricpump body oppositely; and a plurality of negative pressure adjusting through holes are uniformly formed in the side walls of the first flow tube and the side wall of the second flow tube at equal intervals, and the inner wall of the first flow tube and the inner wall of the second flow tube are both provided with elastic pieces in an tight adhering mode. The pump can solve the problem that energysupply to flowing of a boundary layer is weakened by pressurization and deceleration movement of a fluid mainstream region of a valveless piezoelectric pump in the prior art, the flow speed of the boundary layer is reduced or even reduced to zero, so that the phenomena of backflow vortex and the like are caused, and the stability and the safety of fluid conveying are reduced.
Description
technical field [0001] The invention relates to the technical field of hydraulic pumps, in particular to a valveless piezoelectric pump. Background technique [0002] As a fluid conveying device in industry and life, pumps have been used for more than a thousand years. The level of development of pumps determines the level of national defense, scientific research and industry. With the development of biological, medical, chemical and microfluidic fields in recent years, various small pumps have been applied in the above fields, especially in recent years, the use of piezoelectric pumps has become more and more extensive, because piezoelectric pumps have infinite Due to the characteristics of electromagnetic interference and small size, piezoelectric pumps are widely used in fluid transportation in the fields of biology, medicine, chemistry and microfluidics. [0003] Piezoelectric pumps can be classified into valved piezoelectric pumps and valveless piezoelectric pumps acco...
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IPC IPC(8): F04B43/04F04B49/06F04B53/16
Inventor 张建辉唐茗包启波黄智赖丽怡潘殷豪杨冠宇
Owner GUANGZHOU UNIVERSITY