A multi-cone cavity valveless piezoelectric pump
A valveless piezoelectric pump, conical cavity technology, applied in the direction of pumps, pump components, variable capacity pump components, etc., can solve the problems of inability to meet the requirements of delivery flow, affecting the fluid performance of valveless pumps, and unfavorable fluid transmission, etc. To achieve the effect of simple structure, easy installation and precise control of flow supply
Inactive Publication Date: 2015-08-12
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology
The traditional valveless piezoelectric pump uses a single piezoelectric vibrator, which has low input energy and small output flow, which affects the overall performance of the valveless pump for fluid transmission. Backflow, detrimental to fluid transfer
The single piezoelectric vibrator valveless pump cannot meet the requirements of large delivery flow and applications that require precise control of fluid flow.
Method used
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[0027] Such as image 3 , Figure 4 , Figure 5 As shown, the multi-cone cavity valveless piezoelectric pump of this embodiment includes a pump body 3 composed of a base 1 and a pump cover 2, and a pump chamber 4 arranged in the pump body 3. The pump chamber 4 has three A pump chamber unit 43, 43', 43", respectively the first pump chamber unit 43, the second pump chamber unit 43', the third pump chamber unit 43", the first pump chamber unit 43, the second pump chamber unit The chamber unit 43' and the third pump chamber unit 43" each have a liquid inlet 42, 42', 42" and a liquid outlet 41, 41', 41", and the liquid inlet 42, 42', 42 "Piezoelectric vibrators 5, 5', 5" are respectively provided, the liquid outlets 41, 41', 41" are smaller than the liquid inlets 42, 42', 42", and the at least three pump chamber units 43 , 43', 43" are arranged in an annular array, and the liquid outlets 41, 41', 41" are arranged oppositely and form a circular mixing chamber 7. The base 1 is pro...
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The invention discloses a valveless piezoelectric pump with multiple conical cavities. The valveless piezoelectric pump comprises a pump body which consists of a base and a pump cover and a pump cavity formed in the pump body, wherein the pump cavity is provided with at least three pump cavity units; each pump cavity unit is provided with a liquid inlet and a liquid outlet; piezoelectric vibrators are respectively arranged at the liquid inlets; the opening of each liquid outlet is smaller than that of each liquid inlet; the pump cavity units are arranged in an annular array mode; and the liquid outlets are correspondingly formed and communicated with one another to form a circular mixing cavity. The valveless piezoelectric pump is simple in structure and easy and convenient to mount and can be manufactured on a large scale; the multiple cavities are parallelly connected, so that flow and pressure difference are obviously increased; output ripple and return flow of fluid are reduced under the condition of asynchronous drive; a vortex is formed in the circular mixing cavity, so that a function of mixing the fluid is well realized; multiple fluid inlets are formed in a matched mode, so that different kinds of fluid can be mixed; and flow supply can be accurately controlled during asynchronous drive.
Description
technical field [0001] The invention relates to a valveless piezoelectric pump, in particular to a valveless piezoelectric pump with multiple conical cavities. technical background [0002] The classification of piezoelectric pumps can be roughly divided into positive displacement pumps and rotary pumps. At present, most piezoelectric pumps are volumetric pumps. According to the presence or absence of pump valves, piezoelectric pumps can be divided into piezoelectric pumps with valves and piezoelectric pumps without valves, such as figure 1 The valved piezoelectric pump is shown. When it is working, the reciprocating vibration of the piezoelectric vibrator causes the periodic change of the volume of the pump chamber, and the change of the volume causes the change of the pressure in the pump chamber, which controls the opening and closing of the pump valve. Due to factors such as the valve body of the piezoelectric pump with valves, the pump structure is complicated, which l...
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IPC IPC(8): F04B43/04F04B53/16
Inventor 张建辉蔡军黄俊胡方军
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS