CN1082625C

CN1082625C - Piezoelectric ceramic pamp with three-way type inlet and outlet

Info

Publication number: CN1082625C
Application number: CN99110248A
Authority: CN
Inventors: 张建辉
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-07-07
Filing date: 1999-07-07
Publication date: 2002-04-10
Anticipated expiration: 2019-07-07
Also published as: CN1280250A

Abstract

The present invention belongs to the technical field of the machinery, and relates to an improvement of a piezoelectric ceramic pump comprising a branch pipe, a collecting pipe, a fixed sheet, a pump body and a vibrator. Liquid is simultaneously sucked or discharged by the branch pipe and the collecting pipe so as to ensure the succession of succession and improve the use reliability of the pump. The present invention can be applied to the fields of quantitation and flow control pumps of artificial organs, chemistry and biochemistry, hydraulic actuators of micro machinery, power devices for cooling electronic devices and computers, anti-interference devices of electromagnetic fields, etc.

Description

A kind of piezoelectric ceramic pump that has the Three way type gateway

The invention belongs to field of mechanical technique, relate in the fluid mechanics subject improvement a kind of piezoelectric ceramic pump.

The piezoelectric ceramic pump of prior art generally adopts the input and output of one-way valve control fluid flow.It comprises two one-way valves, the pump housing, plain cushion, seal rubber pad, piezoelectric constant ticker.The inlet duct of one-way valve and outer pipe and fluid coupled when exciting takes place in piezoelectric constant ticker energising back, make the cavity volume generating period variation of the pump housing, and when the cavity volume of the pump housing increased, the inlet duct one-way valve was opened the suction fluid.When the cavity volume of the pump housing reduced, the one-way valve outer pipe was opened and is discharged fluid.The problem that prior art exists: because its complex structure of one-way valve is unsuitable in the work of upper frequency situation, not having fluid when making pump suck fluid owing to the cyclically-varying of pump housing cavity volume again discharges, pump does not have fluid and sucks when discharging fluid, the piezoelectric ceramic pump fluid is flowed produce and be interrupted.Periodic vibration opens and closes one-way valve and produces impact force, and influences the continuity that fluid flows.The poor reliability of one-way valve structures complexity, pump.

The objective of the invention is to: overcome the shortcoming of prior art, a kind of no impact force is provided, can under upper frequency, work, and the piezoelectric ceramic pump of fluid continuous-flow.

Detailed content of the present invention is as shown in Figure 1: it comprises: fixed plate 3, set screw 4, the pump housing 5, piezoelectric constant ticker 6, be characterized in: on the pump housing 5, be equipped with branch pipe 1 and collecting fitting 2, branch pipe 1 and collecting fitting 2 are made up of the

cavity

7 and 8 that three-way type hollow communicates, there are

pore

9 and 12 in the two ends of hollow cavity 7, have its pore 11 identical with the pore cross section of hollow cavity 8 one ends and cooperate and to join together between

pore

9 and 12, the other end of hollow cavity 8 is a pore 10.

Working principle of the present invention:

(1). suction process

Figure 4 shows that the suction process of pump, piezoelectric constant ticker 6 produces distortion upwards under the effect of voltage, and the volume of the pump housing 5 inner chambers also upwards is out of shape and increases along with piezoelectric constant ticker 6, and at this moment branch pipe 1, collecting fitting 2 are respectively with Q _{I goes into}And Q _{II goes into}Fluid suck in the pump housing 5, at this moment, the total amount that the pump housing 5 sucks fluids is:

Q _{Always go into}=Q _{I goes into}+ Q _{II goes into}

According to the flow characteristic of branch pipe 1 with collecting fitting 2, adopt two pipe same structures, after the structural parameter of branch pipe 1 and collecting fitting 2 were determined, branch pipe 1 fluid intake was Q _{I goes into}, collecting fitting fluid intake is Q _{II goes into}, actual measurement is learnt: Q _{I goes into}＞Q _{II goes into}, promptly the inhalation flow of suction process bifurcated pipe 1 is greater than the inhalation flow of collecting fitting 2.

(2). process spues

Figure 5 shows that the process that spues of pump, piezoelectric constant ticker 6 produces downward distortion under the effect of voltage, the volume of pump housing inner chamber is diminished, and at this moment, the flow that branch pipe 1, collecting fitting 2 flow out the pump housing is respectively Q _{I goes out}, Q _{II goes out}, according to the flow characteristic of bifurcated pipe 1, then: Q with collecting fitting 2 _{I goes out}＜Q _{II goes out}, and total discharge-amount is:

Q _{Always go out}=Q _{I goes out}+ Q _{II goes out}(2) pump is in the suction and the working procedure that spues, and the flow of suction and the flow that spues equate.That is:

Q _{I goes into}+ Q _{II goes into}=Q _{I goes out}+ Q _{II goes out}(3)

To get after (3) variation:

Δ Q=Q _{I goes into}-Q _{I goes out}=Q _{II goes out}-Q _{II goes into}＞0 (4)

By formula (4) as can be known: branch pipe 1 is in a suction and the process that spues, and the flow that the flow-rate ratio of inflow flows out is many, and collecting fitting 2 is in a suction and the process that spues, and the flow that the flow-rate ratio of outflow flows into is many.That is to say that in piezoelectric constant ticker 6 vibration deformation processes, 2 liang of pipes of branch pipe 1 and collecting fitting have produced dynamic folk prescription to flowing.

Good effect of the present invention: adopt branch pipe and this valveless pump structure of collecting fitting, overcome the problem that one-way valve can not work and the problem of the impact force that produces when opening and closing under upper frequency; Adopt branch pipe and collecting fitting structure, make two pipes suck fluid simultaneously or discharge fluid to have guaranteed that fluid flow is continuous, overcome the problem that the prior art fluid flow is interrupted, improved the operational safety of pump, and simple in structure, easily manufactured, low cost of manufacture.Because the raising of its reliability, can be at the cooling power of hydraulic drive, electronic equipment and the computer of artificial organ, chemistry and biochemical quantitative, flow control pump, micromechanics.Use in fields such as electromagnetic interference place.

Description of drawings:

Fig. 1 is an overall structure sectional view of the present invention.

Fig. 2 is a branch pipe structural drawing of the present invention.

Fig. 3 is a collecting fitting structural drawing of the present invention.

Fig. 4 is a suction process schematic representation of the present invention.

Fig. 5 is the present invention's process schematic representation that spues.

Fig. 6 is the present invention's process schematic representation that sucks and spue.

Embodiments of the invention: as Fig. 1, Fig. 2, shown in Figure 3:

Fixed plate 3 adopts metallic type or nonmetallic material to make.Set screw 4 is selected size as required.The pump housing 5 adopts non-ferrous metal such as stainless steel, copper or aluminium etc., and piezoelectric constant ticker 6 is selected the standardized product of market supply or selected according to special requirement.Branch pipe 1 and collecting fitting 2 adopt metallic material or nonmetallic material to make, and are linked together with the pump housing 5, and the d diameter of its

pore

9,10,12 is chosen as 2mm.The total length L of hollow cavity 7, selection 10mm, its short-and-medium length L ₁, select 4mm, the angle Φ of the length of the length of hollow cavity 7 and hollow cavity 8 selects 10 °, angle Φ determines the cross section of pore 11, thereby makes hollow cavity 7 and hollow cavity 8 be connected into one.Also can select the length L and the L of hollow cavity 7 and hollow cavity 8 according to different needs ₁And both

angle Φ.Pore

9,10,11,12 also can be selected the size of its diameter d according to different needs.

Claims

1. piezoelectric ceramic pump that has the Three way type gateway, it comprises: fixed plate 3, set screw 4, the pump housing 5, piezoelectric constant ticker 6, it is characterized in that: on the pump housing 5, be equipped with branch pipe 1 and collecting fitting 2, branch pipe 1 and collecting fitting 2 are made up of the cavity 7 and 8 that three-way type hollow communicates, there are pore 9 and 12 in the two ends of hollow cavity 7, have its pore 11 identical with the pore cross section of hollow cavity 8 one ends and cooperate and to join together between pore 9 and 12, the other end of hollow cavity 8 is a pore 10.