CN104405625A

CN104405625A - Valveless piezoelectric pump with inner bucket flow pipe

Info

Publication number: CN104405625A
Application number: CN201410532989.0A
Authority: CN
Inventors: 卢振洋; 夏齐霄; 雷红; 田娥; 刘欢
Original assignee: Beijing Union University
Current assignee: Beijing Union University
Priority date: 2014-10-11
Filing date: 2014-10-11
Publication date: 2015-03-11
Anticipated expiration: 2034-10-11
Also published as: CN104405625B

Abstract

The invention discloses a valveless piezoelectric pump with an inner bucket flow pipe, and belongs to the field of fluid machines. According to the valveless piezoelectric pump with the inner bucket flow pipe, faces with the same polarity of two round piezoelectric vibrators (2) are oppositely arranged on a pump body (3); a pump cavity (1) is formed between the two round piezoelectric vibrators (2); the pump body (3) is connected to the inner bucket flow pipe (5) through a through hole (4) in the side face; the inner bucket flow pipe (5) is composed of a round cross section pipe body (7) and a curved surface (8) in the round cross section pipe body (7); space defined by the curved surface (8) and the round cross section pipe body (7) forms a curved bucket (9); the curved surface (8) is in a gradually-opened curved shape; the two sides of an axis (13), arranged in the inner bucket flow pipe (5), of the curved bucket (9) are evenly staggered; and the inner bucket flow pipe (5) is provided with three fluid outlets and inlets, wherein the first outlet and inlet (10) and the second outlet and inlet (11) are connected with an exterior pipeline, and the third outlet and inlet (12) is connected with the through hole (4) in the pump body (3). According to the pump, the inner bucket flow pipe (5) is used for achieving one-way flowing of fluid, and the pump can be applied to the fields of medicine making, medical treatment and the like.

Description

Conflict internally and flow pipe Valveless piezoelectric pump

Technical field

The present invention relates to a kind of Valveless piezoelectric pump, belong to field of fluid machinery.

Background technique

Valveless piezoelectric pump structure is simple, and mechanical Transmitted chains, reliability is high, and electromechanical conversion efficiency is high, easy microminaturization, and in health care, Aero-Space, have a wide range of applications in MEMS.

Summary of the invention

Fig. 1 is the structural drawing of Valveless piezoelectric pump of the present invention.

Conflict internally and flow pipe Valveless piezoelectric pump, it is characterized in that: the face of two circular piezoelectric vibrator (2) identical polars is mounted opposite on the pump housing (3), cavity between two circular piezoelectric vibrators (2) is pump chamber (1), and the pump housing (3) is connected to by the through hole (4) of side conflicts internally on stream pipe (5);

The curved surface (8) that stream pipe (5) of conflicting internally is managed in (7) and circular section pipe (7) by circular section is formed; Curved surface (8) and circular section are managed the space that (7) surround and are formed Qu Dou (9); Curved surface (8) is involute surface shape; Curved surface (8) has crossed the axis (13) of stream pipe (5) of conflicting internally; Qu Dou (9) is evenly staggered in axis (13) both sides of stream pipe (5) of conflicting internally; Stream pipe (5) of conflicting internally has 3 stream sockets, wherein the first gateway (10) and the second gateway (11) connect with extraneous pipeline, and the 3rd gateway (12) connects with the through hole (4) on the pump housing (3); Wherein the first gateway (10) and the second gateway (11) are the gateway up and down of circular section pipe (7), and the 3rd gateway (12) is in the side at middle part, circular section pipe (7).

The working principle of the internal conflict stream pipe Valveless piezoelectric pump that the present invention proposes is described below:

Two circular piezoelectric vibrators (2) are bonded on two counterbores (16) of the end face of the pump housing (3) respectively with the one side that polarity is identical; Stream pipe (5) of conflicting internally is arranged on the through hole (4) of the pump housing (3) side; The curved surface (8) that stream pipe (5) of conflicting internally is managed in (7) and circular section pipe (7) by circular section is formed; Curved surface (8) and circular section are managed the space that (7) surround and are formed Qu Dou (9); Curved surface (8) is involute surface shape; Curved surface (8) has crossed the axis (13) of stream pipe (5) of conflicting internally; Qu Dou (9) is evenly staggered in axis (13) both sides of stream pipe (5) of conflicting internally; Stream pipe (5) of conflicting internally has 3 stream sockets, wherein the first gateway (10) and the second gateway (11) connect with extraneous pipeline, and the 3rd gateway (12) connects with the through hole (4) on the pump housing (3); 3rd gateway (12) is in the side at middle part, circular section pipe (7).

The present invention uses stream pipe (5) of conflicting internally to achieve the one-way flow of fluid, simplify conventional piezoelectric pump structure, this invention is applied in the aspect such as preparation, conveying, injection of suspension, emulsion and the medicament containing microparticle in pharmacy, medical field, new technique can be formed, increase substantially manufacturing efficiency and yield rate.In addition, this invention also has potential use widely at other relevant fluid transmission fields.

Accompanying drawing explanation

Fig. 1 conflicts internally and flows pipe Valveless piezoelectric pump erection drawing;

Fig. 2 pump housing (3) parts drawing;

Fig. 3 conflicts internally and flows pipe (5) parts drawing;

Fig. 4 conflict internally stream pipe (5) partly cut open stereogram;

Fig. 5 conflict internally stream pipe (5) half sectional view in Qu Dou (9) stereogram.

Embodiment

The specific embodiment of the invention is as Fig. 1-Fig. 5.Piezoelectric vibrator diameter 30mm, conflict internally stream bore 6mm, and bent bucket involute base circle diameter (BCD) 3mm, operating voltage 220V, frequency 50Hz, be working medium with water, flow reaches 2100mg/s.

When piezoelectric pump incoming transport power supply, when inhaling journey, two piezoelectric vibrators (2) are in a halftime of Ac, respectively to pump chamber (1) outer lateral bend, pump chamber (1) internal pressure declines, fluid manages the first gateway (10) and the second gateway (11) inflow of (5) from stream of conflicting internally, and through the 3rd gateway (12), through hole (4) flows into pump chamber (1); When Ac changes pressure direction, when entering the next halftime, piezoelectric pump enters the scheduling stage, two piezoelectric vibrators (2) are respectively to pump chamber (1) interior lateral bend, pump chamber (1) volume declines, pressure raises, and the fluid via through holes (4) in pump chamber (1) and the 3rd gateway (12) flow into stream pipe (5) of conflicting internally, and flow out the first gateway (10) and the second gateway (11); Due to the effect of Qu Dou (9) in stream pipe (5) of conflicting internally, the flow resistance that fluid flows to the second gateway (11) direction from the first gateway (10) is less than the flow resistance flowing to the first gateway (10) direction from the second gateway (11); So, the fluid that the fluid ratio flowed into by the first gateway (10) in suction journey flows out the first gateway (10) in scheduling is many, in like manner, inhale in journey and flow into by the second gateway (11) less fluid flowing out the second gateway (11) in the fluid ratio scheduling of stream pipe (5) of conflicting internally, therefore macroscopically creating fluid from the first gateway (10) inflow, from the net flow that the second gateway (11) flow out.

Claims

1. conflict internally and flow pipe Valveless piezoelectric pump, it is characterized in that: the face of two circular piezoelectric vibrator (2) identical polars is mounted opposite on the pump housing (3), cavity between two circular piezoelectric vibrators (2) is pump chamber (1), and the pump housing (3) is connected to by the through hole (4) of side conflicts internally on stream pipe (5);