CN203604172U

CN203604172U - Double-cavity type piezoelectric micropump

Info

Publication number: CN203604172U
Application number: CN201320710980.5U
Authority: CN
Inventors: 胡军
Original assignee: Individual
Current assignee: Shenzhen Heyi Precision Pump Technology Co Ltd
Priority date: 2013-11-12
Filing date: 2013-11-12
Publication date: 2014-05-21
Anticipated expiration: 2023-11-12

Abstract

A double-cavity type piezoelectric micropump comprises a cover body, a shell boy and a pump core component. The shell body is fixedly matched with the cover body to form a pump cavity, the pump core component is arranged in the pump cavity, a first locating protrusion and a first pre-pressing portion are arranged on the cover body, and a second locating protrusion and a second pre-pressing portion are arranged on the shell body. The pump core component comprises a main support fixed in the pump cavity, an auxiliary support fixedly matched with the main support, a first elastic sealing ring arranged on the main support, a second elastic sealing ring arranged on the auxiliary support, a first piezoelectric vibrator, a second piezoelectric vibrator, a first inlet valve, a first outlet valve, a second inlet valve and a second outlet valve, the periphery of the edge of the first piezoelectric vibrator is pre-pressed on the first elastic sealing ring and abuts against the first pre-pressing portion, the periphery of the edge of the second piezoelectric vibrator is pre-pressed on the second elastic sealing ring and abuts against the second pre-pressing portion, the first inlet valve and the first outlet valve are arranged on the main support, and the second inlet valve and the second outlet valve are mounted on the auxiliary support. The double-cavity type piezoelectric micropump is large in flow, compact and small in structure and low in noise, and has high practical value.

Description

A kind of bicavate piezoelectric micropump

Technical field

The utility model relates to pump field, relates to particularly a kind of piezoelectric pump.

Background technique

In some fields, as the field such as electronic product, the Shui nationality, no matter water pump or air pump, generally require its volume as much as possible little, the noise producing is low as much as possible, and flow is high as much as possible, pressure also can be on certain required value, and existing middle traditional pump, for example electric-motor pump, is generally difficult to meet the requirement that volume is little and noise is low, nowadays, the piezoelectric pump occurring on market, well solve the large and large problem of noise of volume, for example see the disclosed piezoelectric pump of Chinese patent CN200580039113.1, embodiment 1 is disclosed is the piezoelectric pump of a kind of monolithic list chamber (a corresponding variable cavity of piezoelectric vibrator) formula, the working method of this pump is to utilize the characteristic of piezoelectric vibrator to realize, general piezoelectric vibrator comprises conductive substrate and covers the piezoelectric constant with conductive coating on conductive substrate, the two-stage of the cable being connected with ac power supply is welded on respectively on the conductive coating of conductive substrate and piezoelectric constant, connect after ac power supply, there is double vibrations in piezoelectric vibrator, thereby circulation increases and dwindles the volume of ground period changing variable cavity, in the time that variable cavity dwindles, in compression chamber, medium forces outlet valve to be opened, thereby in chamber, medium flows out to the external world, in the time that expanding, variable cavity makes to form in chamber negative pressure, thereby extraneous medium forces inlet valve to be opened and flows to variable cavity by inlet valve, piezoelectric pump is by the double vibrations of piezoelectric vibrator, continuously extraneous medium is pumped in variable cavity, then medium in variable cavity is pumped out to extraneous required destination, the pump of this kind of form can be accomplished volume microminiaturization and can reduce well noise, but owing to being limited at present amplitude and the life-span thereof of piezoelectric vibrator, its flow is more much smaller than conventional pump, and pressure is also smaller, because the variation of variable cavity volume size is relevant with the amplitude of piezoelectric vibrator, the amplitude that is piezoelectric vibrator is larger, the variable quantity of variable cavity volume is larger, therefore the flow of fed sheet of a media is also larger, pressure is also larger, and the amplitude of piezoelectric vibrator is very little, generally can only reach tens microns, and directly related with voltage, be that voltage is larger, its amplitude is larger, otherwise amplitude is less, but too high raising voltage, easily cause the piezoelectric constant of piezoelectric vibrator to break, make piezoelectric pump disablement, so, although piezoelectric pump has solved volume greatly and the large problem of noise, but flow greatly reduces, pressure has also diminished, for this piezoelectric pump, generally wish that flow can reach double raising, and in order to improve flow, a kind of monolithic two-chamber (respectively there is a variable cavity piezoelectric vibrator both sides) formula piezoelectric pump is also provided in the embodiment 2 of the disclosure patent and embodiment 3, each cavity is provided with an inlet valve and an outlet valve, and be symmetricly set on the both sides of pump core, like this, piezoelectric vibrator is in the time of the motion that a pump chamber is dwindled, simultaneously to this motion expanding of another pump chamber, vice versa, although the piezoelectric pump of this structure can increase a certain amount of flow, but because piezoelectric vibrator both sides are all subject to load, its pressure diminishes, medium transport is arrived required destination by the power that is difficult to reach enough, especially, if as air pump pump gas, even be difficult to open valve, and, the noise main source of piezoelectric pump is exactly at valve port place, next is only the vibrating noise that vibrational energy that piezoelectric vibrator is sent to each component sends, and the inlet valve of piezoelectric pump in above-mentioned and outlet valve are arranged on the two ends of the pump housing and near housing, must increase noise, and also larger to volume increase, be easy to expect solve hypotensive problem in above-described embodiment with biplate two-chamber (two respectively corresponding variable cavities of piezoelectric vibrator) formula piezoelectric pump according to above-mentioned two kinds of embodiments, and the piezoelectric pump of this biplate bicavate even can double total discharge, therefore pressure but do not reduce, be equivalent to the direct stack of two monolithic list chamber pumps, although but flow has increased, volume but has to therefore increase considerably, especially owing to thering are two vibration sources, therefore the vibrational energy being delivered on other component of pump also increases, add the switching work of two inlet valves and two outlet valves, these situations all can cause producing larger noise, like this, be difficult to again to apply in the environment that volume and noise are had relatively high expectations, this is to be also why all generally monolithic single-chamber type in present piezoelectric pump used, even if there is monolithic bicavate, biplate bicavate, also generally just apply to less demanding to noise or in the not high environment of volume requirement, the piezoelectric pump of for example above-mentioned publication applies in freezer, so, for piezoelectric pump, improve flow and the not therefore increase of volume and noise, or the amplitude that flow improves is much larger than the amplitude of volume and noise increase, it is current problem in the urgent need to address.

Model utility content

The utility model is to solve existing piezoelectric pump flow low problem, and spy provides one greatly to improve its flow and volume amplification is less, a kind of bicavate piezoelectric micropump that noise does not increase because of flow.

A kind of bicavate piezoelectric micropump of the present utility model, comprise lid, with lid secure fit and with form the housing of pump chamber and be positioned at the pump core assembly of pump chamber, described lid and/or housing are provided with outlet, described lid is provided with for the first positioning convex of installation pump core assembly and the first pre-splenium, and described housing is provided with for the second positioning convex of installation pump core assembly and the second pre-splenium;

Described pump core assembly comprises: edge is provided with the main bearing of sidewall around, secondary bearing with main bearing secure fit, be arranged on the first elastic seal ring on main bearing, be arranged on the second elastic seal ring on secondary bearing, edge is pressed in advance on the first elastic seal ring around and supports the first piezoelectric vibrator of the first pre-splenium, edge is pressed in advance on the second elastic seal ring around and supports the second piezoelectric vibrator of the second pre-splenium, be arranged on the first inlet valve and the first outlet valve on main bearing, and be arranged on the second inlet valve and the second outlet valve on secondary bearing,

One side of described main bearing and the space that sidewall surrounds are for holding the first elastic seal ring and the first piezoelectric vibrator, and described main bearing and the first elastic seal ring, the space that the first piezoelectric vibrator surrounds forms the first variable cavity, the space that the opposite side of described main bearing and sidewall surround is for holding secondary bearing, the second elastic seal ring and the second piezoelectric vibrator, described secondary bearing and the second elastic seal ring, the space that the second piezoelectric vibrator surrounds forms the second variable cavity, described the first variable cavity is held medium and is discharged medium by the first outlet valve by the first inlet valve, described the second variable cavity is held medium and is discharged medium by the second outlet valve by the second inlet valve, one end outside the second variable cavity of one end outside the first variable cavity of described the first inlet valve and the first outlet valve and the second inlet valve and the second outlet valve is all between main bearing and secondary bearing,

The sidewall that described the first positioning convex and the second positioning convex are centered around main bearing around, described main bearing is by the first positioning convex and second restriction of positioning convex oppose side wall and lid is supported respectively at the two ends of sidewall and housing is fixed in pump chamber, described main bearing and secondary bearing be provided with cooperatively interact form for holding the outlet plenum of the medium that the first variable cavity and the second variable cavity discharge, on described main bearing and/or secondary bearing, be also provided with the discharge tube being connected with outlet plenum, and discharge tube is interlinked to the outside by outlet and pump chamber.

Through further improving, between described main bearing and secondary bearing, be also formed with a noise abatement chamber, the entry end of described the first inlet valve and the second inlet valve is positioned at noise abatement chamber, and described noise abatement chamber is connected with the pump chamber space outside noise abatement chamber, and described outlet plenum is positioned at noise abatement chamber.

Through further improving, on the edge of described secondary bearing, be provided with the limiting stopper that there is location and keep out the second elastic seal ring effect, on the sidewall of described main bearing, offer the restraining groove cooperatively interacting with limiting stopper, and described limiting stopper and restraining groove are formed with a vent, described noise abatement chamber is connected with the pump chamber space outside noise abatement chamber by vent.

Through further improving, described discharge tube is arranged on main bearing, described discharge tube passes sidewall and extends to Way out.

Through further improving, on the sidewall of described main bearing, be also provided be centered around discharge tube around fixed tube, between described fixed tube and described discharge tube, be formed with the circular groove being connected with outlet, and described fixed tube by respectively with being communicated with of be tightly connected sealing outlet and the pump chamber of lid and housing.

Through further improving, in described fixed tube, be arranged with damping sealing ring, described fixed tube is tightly connected by damping sealing ring and lid and housing.

Through further improving, described lid and housing are provided with the recess corresponding to each other, and described outlet is that the recess of lid and housing combines, and described discharge tube stretches out to outlet extension.

Improve through another kind of, described discharge tube is cooperatively interacted and is formed by main bearing and secondary bearing.

Improve through another kind of, described discharge tube is arranged on secondary bearing.

Through further improving, described outlet is one, and described outlet plenum is one, and described discharge tube is one.

Improve through another kind of, described outlet is two, described outlet plenum is two, described discharge tube is two, and two outlet plenums and two discharge tubes are corresponding and be communicated with one by one, and two discharge tubes are corresponding one by one with two outlets, and the medium flowing out by the first outlet valve flows to one of them outlet plenum, the medium flowing out by the second outlet valve flows to another outlet plenum, and two discharge tubes are interlinked to the outside by corresponding outlet and pump chamber respectively.

Through further improving, between the described first pre-splenium and the first piezoelectric vibrator, be also provided with the first elastic ring, the described first pre-splenium is pressed on the first piezoelectric vibrator in advance by the first elastic ring, between the described second pre-splenium and the second piezoelectric vibrator, be also provided with the second elastic ring, the described second pre-splenium is pressed on the second piezoelectric vibrator in advance by the second elastic ring.

Through further improving, on the two ends of the sidewall of described main bearing, be respectively equipped with the first opening slot and the second opening slot, described lid is provided with the first spacing preiection matching with the first opening slot, and described housing is provided with the second spacing preiection matching with the second opening slot.

Through further improving, described the first inlet valve and the second inlet valve, the first outlet valve and the second outlet valve are staggeredly arranged each other on corresponding main bearing and secondary bearing.

Through further improving, the first piezoelectric vibrator and the second piezoelectric vibrator include conductive substrate and cover the piezoelectric constant with conductive coating on conductive substrate, the distribution that is mutually symmetrical of described the first piezoelectric vibrator and the second piezoelectric vibrator, described the first piezoelectric vibrator and the conductive substrate of the second piezoelectric vibrator and the one-level of ac power supply are electrically connected, and the conductive coating of the piezoelectric constant of described the first piezoelectric vibrator and the second piezoelectric vibrator is electrically connected with another level of ac power supply.

Through further improving, described the first positioning convex and the second positioning convex, the first pre-splenium are identical with the second pre-splenium and mutually corresponding, described the first elastic seal ring and the second elastic seal ring, the first piezoelectric vibrator and the second piezoelectric vibrator are mutually the same, as a whole can forward after described main bearing and secondary bearing cooperatively interact and be oppositely assemblied in the pump housing.

Technological scheme by bicavate piezoelectric micropump of the present utility model is known, aspect flow, bicavate piezoelectric micropump has two piezoelectric vibrators and two variable cavities, thereby can provide enough power pumped medium, its pump output can reach the twice of monolithic list chamber pump, and therefore the pressure of pumping liquid do not diminish.

Aspect noise, the space that the opposite side of main bearing and sidewall surround is for holding secondary bearing, secondary bearing and main bearing secure fit, one end outside the second variable cavity of one end outside the first variable cavity of described the first inlet valve and the first outlet valve and the second inlet valve and the second outlet valve is all between main bearing and secondary bearing, thereby, the main source of general piezoelectric pump generation noise, be inlet valve and outlet valve switching sound and/or and main bearing and secondary bearing between the sound that sends while going out of the lap that produces and MEDIA FLOW influent stream isolated by main bearing and secondary bearing, noise is significantly slackened, although two piezoelectric vibrators are supported respectively two pre-spleniums also respectively near lid and housing, but because their opposite side is all pressed on elastic seal ring in advance, so piezoelectric vibrator is also difficult for lid and housing to produce significantly vibration, and piezoelectric vibrator in vibration processes directly and the main vibrational energy main bearing and secondary bearing being produced by the medium in variable cavity, and all inlet valves, outlet valve is delivered to the vibrational energy on main bearing and secondary bearing, almost all on the direction of vibration of piezoelectric vibrator, namely sidewall is supported respectively in the direction of lid and housing, and on the direction of vibration of piezoelectric vibrator, main bearing supports lid by sidewall and housing is fixed, so piezoelectric vibrator, secondary bearing and be arranged on main bearing and secondary bearing on inlet valve, outlet valve directly or indirectly finally almost all concentrates on the sidewall of main bearing the vibration of main bearing, and the edge that sidewall is distributed in main bearing around on, so vibrational energy can effectively be weakened, make vibration be difficult for being delivered on lid and housing.Therefore for whole pump, with respect to the monolithic list chamber pump in existing, can't obviously increase noise, can reach the direct audiometry of employment ear and be difficult for telling the effect that noise increases.

Aspect volume, one side of main bearing and the space that sidewall surrounds are for holding the first elastic seal ring and the first piezoelectric vibrator, and described main bearing and the first elastic seal ring, the space that the first piezoelectric vibrator surrounds forms the first variable cavity, the space that the opposite side of described main bearing and sidewall surround is for holding secondary bearing, the second elastic seal ring and the second piezoelectric vibrator, described secondary bearing and the second elastic seal ring, the space that the second piezoelectric vibrator surrounds forms the second variable cavity, and one end outside the second variable cavity of one end outside the first variable cavity of described the first inlet valve and the first outlet valve and the second inlet valve and the second outlet valve is all between main bearing and secondary bearing, so, in fact the volume of whole pump core assembly is exactly the volume that main bearing surrounds, and owing to not increasing in the upper overall structure of horizontal direction (i.e. the direction vertical with piezoelectric vibrator direction of vibration), only on longitudinal direction (being piezoelectric vibrator direction of vibration), increase a secondary bearing, an elastic seal ring and a piezoelectric vibrator, and outlet plenum of the present utility model is to be cooperatively interacted by main bearing and secondary bearing to form, and this outlet plenum is due between main bearing and secondary bearing, can play good soundproof effect, so chamber does not need to make too deeply in a longitudinal direction, do not need to increase in a longitudinal direction extra structure and flow out with the switching of isolation outlet valve and medium the noise being sent yet, thereby, in fact the thickness that whole pump increases be in a longitudinal direction less than a secondary bearing, the thickness increasing at longitudinal direction after an elastic seal ring and a piezoelectric vibrator assembling, the increase of whole pump thickness can be controlled in 30% completely, if bicavate piezoelectric micropump of the present utility model is as air pump, the valve adopting is a kind of self closing stop valve in a longitudinal direction with certain length, the increase of whole pump thickness can also be controlled in 20%, increased the pump of a times for flow, it is very considerable that volume only increases by 20%, to be very easy to allow client accept.So bicavate piezoelectric micropump of the present utility model can significantly increase its application area, has very high using value.

In addition, bicavate piezoelectric micropump of the present utility model both can also can be used as water pump as air pump, the inlet valve, outlet valve, piezoelectric vibrator and their matching requirements that only just adopted in practice as air pump with as water pump may be different, and, if for pumping non-air medium, also easily realize, increase inlet duct and join to extending between main bearing and secondary bearing with the entrance that flows to variable cavity, can't increase the volume of integral pump.

Accompanying drawing explanation

The stereogram of a kind of mode of execution of a kind of bicavate piezoelectric micropump that Fig. 1 provides for the utility model.

The explosive view of a kind of mode of execution of a kind of bicavate piezoelectric micropump that Fig. 2 provides for the utility model.

The stereogram of the main bearing of a kind of mode of execution of a kind of bicavate piezoelectric micropump that Fig. 3 provides for the utility model.

Main bearing and stereograms Fig. 3 different amount of a kind of mode of execution of a kind of bicavate piezoelectric micropump that Fig. 4 provides for the utility model.

The stereogram of the secondary bearing of a kind of mode of execution of a kind of bicavate piezoelectric micropump that Fig. 5 provides for the utility model.

Secondary bearing and stereograms Fig. 5 different amount of a kind of mode of execution of a kind of bicavate piezoelectric micropump that Fig. 6 provides for the utility model.

The A-A sectional view of the amplification of a kind of mode of execution of a kind of bicavate piezoelectric micropump that Fig. 7 provides for the utility model.

The B-B sectional view of the amplification of a kind of mode of execution of a kind of bicavate piezoelectric micropump that Fig. 8 provides for the utility model

The stereogram of the another kind of mode of execution of a kind of bicavate piezoelectric micropump that Fig. 9 provides for the utility model.

The explosive view of the another kind of mode of execution of a kind of bicavate piezoelectric micropump that Figure 10 provides for the utility model.

The stereogram of the main bearing of the another kind of mode of execution of a kind of bicavate piezoelectric micropump that Figure 11 provides for the utility model.

The stereogram of the secondary bearing of the another kind of mode of execution of a kind of bicavate piezoelectric micropump that Figure 12 provides for the utility model.

Embodiment

Clearer for technical problem, technological scheme and beneficial effect that the utility model is solved, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.

As shown in Figures 1 to 8, wherein in Fig. 2 explosive view, do not show electrified cable 19, in Fig. 8 not to cable 6, female terminal 7, circuit board 8, electrified cable 19, the first piezoelectric vibrator 10a and the second piezoelectric vibrator 10b analyse and observe, a kind of bicavate piezoelectric micropump of the present embodiment, comprise lid 1, with lid 1 secure fit and with form the housing 2 of pump chamber 16, and be positioned at the pump core assembly of pump chamber 16, lid 1 can be fixedly connected with or be fixedly connected with by ultrasound by screw with housing 2, also can fix connection by other known mode that is fixedly connected with, described lid 1 and housing 2 are provided with the recess corresponding to each other, form outlet 17 at latter two recess of secure fit like this, except the present embodiment, also can on lid 1 or housing 2, offer separately outlet 17, can also on one in lid 1 and housing 2, offer recess, coordinate and form outlet 17 with the extension part to extending in recess forming on another Huo edge, edge, described lid 1 is provided with for the first positioning convex 11 of installation pump core assembly and the first pre-splenium 12, and described housing 2 is provided with for the second positioning convex 21 of installation pump core assembly and the second pre-splenium 22.

Described pump core assembly comprises: edge is provided with the main bearing 3 of sidewall 32 around, secondary bearing 4 with main bearing 3 secure fit, be arranged on the first elastic seal ring 13a on main bearing 3, be arranged on the second elastic seal ring 13b on secondary bearing 4, edge is around pressed in the first elastic seal ring 13a in advance goes up and supports the first piezoelectric vibrator 10a of the first pre-splenium 12, edge is around pressed in the second elastic seal ring 13b in advance goes up and supports the second piezoelectric vibrator 10b of the second pre-splenium 22, be arranged on the first inlet valve 11a and the first outlet valve 12a on main bearing 3, and be arranged on the second inlet valve 11b and the second outlet valve 12b on secondary bearing 4, in order to play further cushioning effect and in order to improve flow, between the described first pre-splenium 12 of the present embodiment and the first piezoelectric vibrator 10a, be also provided with the first elastic ring 14a, that is to say that the first piezoelectric vibrator 10a supports the first pre-splenium 12 by the first elastic ring 14a, same the present embodiment is also provided with an elastic ring between the described second pre-splenium 22 and the second piezoelectric vibrator 10b, i.e. the second elastic ring 14b, to reach same object.

The space that one side of described main bearing 3 and sidewall 32 surround is for holding the first elastic seal ring 13a and the first piezoelectric vibrator 10a, and described main bearing 3 and the first elastic seal ring 13a, the space that the first piezoelectric vibrator 10a surrounds forms the first variable cavity 5a, the space that the opposite side of described main bearing 3 and sidewall 32 surround is for holding secondary bearing 4, the second elastic seal ring 13b and the second piezoelectric vibrator 10b, described secondary bearing 4 and the second elastic seal ring 13b, the space that the second piezoelectric vibrator 10b surrounds forms the second variable cavity 5b, in the present embodiment, main bearing 3 is provided with the limit rib 37 of supporting secondary bearing 4 surrounding edges, secondary bearing 4 is by with sidewall 32 interference fit of main bearing 3 and support limit rib 37 and realize fixing, and, the face 31 that the participation of main bearing 3 forms the first variable cavity 5a is the concave arc surface to center micro-pits, go out to increase MEDIA FLOW influent stream, and form a circular groove between the marginal trough of concave arc surface and sidewall 32, this circular groove is used for installing the first elastic seal ring 13a, the face 41 that the participation of secondary bearing 4 forms the second variable cavity 5b also adopts same design, to reach same object, described the first variable cavity 5a is held medium and is discharged medium by the first outlet valve 12a by the first inlet valve 11a, described the second variable cavity 5b is held medium and is discharged medium by the second outlet valve 12b by the second inlet valve 11b, one end outside the second variable cavity 5b of one end outside the first variable cavity 5a of described the first inlet valve 11a and the first outlet valve 12a and the second inlet valve 11b and the second outlet valve 12b is all between main bearing 3 and secondary bearing 4, the inlet valve 11a that the present embodiment adopts, 11b and

outlet valve

12a, 12b is identical, for one has flexible self-closing valve, this valve is generally long than umbrella valve, comprise assembly department, connect the opening of assembly department and the opening/closing portion being formed by two halves, main bearing 3 is provided with inlet opening 311 and exit orifice 312, secondary bearing 4 is provided with inlet opening 411 and exit orifice 412, these self-closing valves are fixed on main bearing 3 and secondary bearing 4 through these holes by its assembly department, and rely on self elasticity to contact with the hole wall sealing in these holes, medium flows to the other end of opening from one end that is positioned at assembly department of opening, opening/closing portion is for the other end of open and close opening, by the switching of opening realize in variable cavity with variable cavity outside circulation, this valve is applicable to the pump of pump gas medium, so the bicavate piezoelectric micropump in the present embodiment is as a kind of air pump, in the present embodiment, do not have at inlet valve 11a, the entry end of 11b is taken in succession, but allow inlet valve 11a, the entry end of 11b is directly communicated with pump chamber 16, so this kind of air pump is for pumped air, pump chamber 16 and ambient atmosphere phase defaecation pumped air continuously, do not need separately to add structure or component.In order to save space, the first inlet valve 11a of the present embodiment and the second inlet valve 11b, the first outlet valve 12a and the second outlet valve 12b are staggeredly arranged each other on corresponding main bearing 3 and secondary bearing 4, taking full advantage of like this at horizontal direction (is the therefrom direction of diffusion around mind-set of piezoelectric vibrator, also be the direction perpendicular with piezoelectric vibrator direction of vibration) upper existing space, and need not hold each valve in the upper another space that increases of longitudinal direction (i.e. the first piezoelectric vibrator 10a direction relative with the second piezoelectric vibrator 10b is also the direction of vibration of piezoelectric vibrator).

In order to increase the intensity of main bearing 3 and secondary bearing 4, in the present embodiment, be also respectively equipped with corresponding stiffening rib 38 and stiffening rib 48 at main bearing 3 with on secondary bearing 4 both relative faces.

In the present embodiment, the sidewall 32 that the first positioning convex 11 of lid 1 and the second positioning convex 21 of housing 2 are all centered around main bearing 3 around, because of but a kind of annular positioning convex, but not the annular shape of sealing, there is opening, it is the second opening 23 on the first opening 13 and the housing 2 on lid 1, two openings are corresponding, described main bearing 3 is by the first positioning convex 11 and second restriction of positioning convex 21 oppose side walls 32 and lid 1 is supported respectively at the two ends of sidewall 32 and housing 2 is fixed in pump chamber 16, described main bearing 3 and secondary bearing 4 be provided with cooperatively interact form for holding the outlet plenum 351 of the medium that the first variable cavity 5a and the second variable cavity 5b discharge, described main bearing 3 is also provided with the discharge tube 33 being connected with outlet plenum 351, and discharge tube 33 is interlinked to the outside with pump chamber 16 by exporting 17.The outlet plenum 351 of the present embodiment and discharge tube 33 are all one, main bearing 3 is provided with a circle muscle 35, secondary bearing 4 is provided with two

circle muscle

43, 44, two circle muscle 43, between 44, form a circular groove 45, be used for laying seal ring 10, after main bearing 3 and secondary bearing 4 coordinate, one circle muscle 35 of main bearing is pressed on seal ring 35 in advance, thereby form oral cavity 351, can certainly on main bearing 3, two circle muscle be set, be used for settling seal ring, and being set on secondary bearing 4, a circle is pressed in advance the muscle on seal ring, also can reach same effect, seal ring is used for sealing, so without seal ring, also passable by other mode that is tightly connected, as long as can play seal action, in order to save space, on the secondary bearing 4 of the present embodiment, be also provided with dodge discharge tube 33 dodge space 47, if certain discharge tube 33 is thinner or discharge tube 33 is cooperatively interacted and formed by main bearing 3 and secondary bearing 4, also can arrange and dodge space, can not cause the waste in space, two outlet valve 12a, the opening/closing portion of 12b is positioned at outlet plenum 351, so two outlet valve 12a, after the opening/closing portion of 12b is opened, medium has just flow in outlet plenum 351, and then by outside discharge tube 33 excavationg pumps, so a discharge tube 33 is discharged two variable cavity 5a simultaneously, the medium that 5b discharges.Certainly, discharge tube 33 also can be arranged on secondary bearing 4.

In order to play further noise reduction effect, in the present embodiment, between described main bearing 3 and secondary bearing 4, be also formed with a noise abatement chamber 20, the entry end of described the first inlet valve 11a and the second inlet valve 11b is positioned at noise abatement chamber 20, described noise abatement chamber 20 is connected with pump chamber 16 spaces outside noise abatement chamber 20, and described outlet plenum 351 is positioned at noise abatement chamber 20.The edge of described secondary bearing 4 is provided with the limiting stopper 42 that has location and keep out the second elastic seal ring 13b effect, on the sidewall 32 of described main bearing 3, offer the restraining groove 324 cooperatively interacting with limiting stopper 42, and described limiting stopper 42 is formed with a vent 325 with restraining groove 324, described noise abatement chamber 20 is connected with pump chamber 16 spaces outside noise abatement chamber 20 by vent 325 and the first opening 13 and/or the second opening 23.Design like this installation location to secondary bearing 4, both aspects, also for convenience detach, and limiting stopper 42 can keep out the second elastic seal ring 13b, and the second variable cavity 5b can not be leaked at restraining groove 324 places.

And, for the access of externally connected pipe, the discharge tube 33 of the present embodiment extends through sidewall 32 and to outlet 17 directions, thereby externally connected pipe can directly be enclosed within on discharge tube 33, externally connected pipe is generally flexible pipe, flexible, cause occurring unnecessary noise and may encounter lid 1 and housing 2 when not allowing externally connected pipe bending at the edge at outlet 17 places, discharge tube 33 is extended to outlet 17.The discharge tube 33 of the present embodiment is built-in, stretch out 1-2mm at the edge at outlet 17 places except encountering lid 1 and housing 2 when not allowing externally connected pipe bending, almost all inside contract in pump chamber 16, externally connected pipe so have to, outlet 17 arranged greatlyr so that can firmly be socketed on discharge tube 33 to outlet 17 interior extensions, but therefore there is a problem, the noise that is pump chamber 16 interior generations easily spreads out of by exporting 17, for this reason, the present embodiment also on the sidewall 32 of main bearing 3, be provided be centered around around discharge tube 33 fixed tube 34, between described fixed tube 34 and described discharge tube 33, be formed with and outlet 17 circular grooves that are connected 332, and described fixed tube 34 by respectively with being communicated with of be tightly connected sealing outlet 17 and the pump chamber 16 of lid 1 and housing 2.The mode that is tightly connected for being arranged with damping sealing ring 9 in fixed tube 34, lid 1 is provided with clamping part 14, housing is provided with lower clamping part 24, upper clamping part 14 and lower clamping part 24 cooperatively interact and grip pipe 34 by damping sealing ring 9, so both play seal action, can also play cushioning effect to fixed tube 34.Like this after design, externally connected pipe can be through outlet 17 and to the interior extension of circular groove 332, thereby can firmly be socketed on discharge tube 33, and can therefore not produce noise.In order to dodge discharge tube 33 and fixed tube 24, the second positioning convex 21 on the first positioning convex 11 and housing 2 on lid 1 is provided with dodges recess.

And in order better to play cushioning effect, the first piezoelectric vibrator 10a and the second piezoelectric vibrator 10b of the present embodiment are arranged symmetrically with, their conductive substrate is all connected on the same of ac power supply and extremely goes up, on the conductive coating of piezoelectric constant, all connect another utmost point of ac power supply, like this, the direction of vibration of the first piezoelectric vibrator 10a and the second piezoelectric vibrator 10b keeps opposite directions always, the vibrational energy that they are delivered on other component like this can also mutually slacken or offset, thereby can further reduce noise.

For the ease of main bearing 3 is installed to location, the present embodiment is also respectively equipped with the first opening slot 325 and the second opening slot 326 on the two ends of the sidewall 32 of main bearing 3, described lid 1 is provided with the first spacing preiection 15 matching with the first opening slot 325, described housing 2 is provided with the second spacing preiection 25 matching with the second opening slot 326, and design also can limit main bearing 3 and rotates in pump chamber 16 like this.

In order to make each component general as much as possible, and install simple, first positioning convex 11 of the present embodiment and the second positioning convex 21, the first pre-splenium 12 is identical with the second pre-splenium 22 and mutually corresponding, described the first elastic seal ring 13a and the second elastic seal ring 13b, the first piezoelectric vibrator 10a and the second piezoelectric vibrator 10b are mutually the same, described main bearing 3 as a whole can forward after cooperatively interacting with secondary bearing 4 and is oppositely assemblied in the pump housing 16, that is to say that mangetic core assembly can also can oppositely assemble in forward assembling, can not affect performance, greatly improve the convenience of assembling.

And, the present embodiment is also provided with the circuit board 8 being fixed on housing 2 in pump chamber 16, be fixed on the multiple female terminals 7 on circuit board 8, female terminal 7 is connected with cable 6 conductions by circuit board 8, on each electrified cable 19 of switching on to

piezoelectric vibrator

10a, 10b, male terminal (not shown) is installed, like this, install after pump core assembly, again corresponding male terminal is inserted to corresponding female terminal 7, when cable 6 and ac power supply energising, can realize

piezoelectric vibrator

10a, 10b and do double vibrations motion, design is also for the ease of assembling like this.

A kind of bicavate piezoelectric micropump as shown in Fig. 9 to Figure 12 is another kind of embodiment of the present utility model, in Figure 10 explosive view, do not show electrified cable 19, this embodiment's bicavate piezoelectric micropump is identical with the bicavate piezoelectric micropump main structure described in above-described embodiment, and only following structure is different:

Described outlet 17, outlet plenum 351 and discharge tube 33 are two, and two discharge sides 351 and two discharge tubes 33 are corresponding and be communicated with one by one, two discharge tubes 33 are corresponding one by one with two outlets 17, the medium flowing out by the first outlet valve 12a flows to one of them discharge side 351, the medium flowing out by the second outlet valve 12b flows to 351, two discharge tubes 351 of another discharge side and is interlinked to the outside with pump chamber 16 by corresponding outlet 17 respectively.In this embodiment, two discharge tubes 351 are also built-in, also around it, be provided with fixed tube 34, fixed tube 34 is also all roughly the same with the Hermetical connecting structure of lid 1 and housing 2, the second positioning convex 21 on the first positioning convex 11 and housing 2 on lid 1 is also provided with the recess of dodging fixed tube 34, owing to having increased an outlet plenum 351 and a fixed tube 34, so also increased a seal ring 10 and a damping sealing ring 9.The pump of this structure can be conveniently to multiple destinations fed sheet of a media, for example, as a kind of air pump of giving fish jar oxygen supply, two external tracheaes can be arranged in the diverse location in fish jar, then carry air (oxygen) by two discharge tubes of air pump to two external tracheaes, can make more fish breathe sufficient oxygen simultaneously.

The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all any modifications within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.

Claims

1. a bicavate piezoelectric micropump, comprise lid (1), with lid (1) secure fit and with form pump chamber (16) housing (2), and be positioned at the pump core assembly of pump chamber (16), it is characterized in that: described lid (1) and/or housing (2) are provided with outlet (17), described lid (1) is provided with for first positioning convex (11) of installation pump core assembly and the first pre-splenium (12), described housing (2) is provided with for second positioning convex (21) of installation pump core assembly and the second pre-splenium (22),

Described pump core assembly comprises: edge is provided with the main bearing (3) of sidewall (32) around, secondary bearing (4) with main bearing (3) secure fit, be arranged on the first elastic seal ring (13a) on main bearing (3), be arranged on the second elastic seal ring (13b) on secondary bearing (4), edge is around pressed in the first elastic seal ring (13a) in advance goes up and supports first piezoelectric vibrator (10a) of the first pre-splenium (12), edge is around pressed in the second elastic seal ring (13b) in advance goes up and supports second piezoelectric vibrator (10b) of the second pre-splenium (22), be arranged on the first inlet valve (11a) and the first outlet valve (12a) on main bearing (3), and be arranged on the second inlet valve (11b) and the second outlet valve (12b) on secondary bearing (4),

The space that one side of described main bearing (3) and sidewall (32) surround is for holding the first elastic seal ring (13a) and the first piezoelectric vibrator (10a), and described main bearing (3) and the first elastic seal ring (13a), the space that the first piezoelectric vibrator (10a) surrounds forms the first variable cavity (5a), the space that the opposite side of described main bearing (3) and sidewall (32) surround is for holding secondary bearing (4), the second elastic seal ring (13b) and the second piezoelectric vibrator (10b), described secondary bearing (4) and the second elastic seal ring (13b), the space that the second piezoelectric vibrator (10b) surrounds forms the second variable cavity (5b), described the first variable cavity (5a) is held medium and is discharged medium by the first outlet valve (12a) by the first inlet valve (11a), described the second variable cavity (5b) is held medium and is discharged medium by the second outlet valve (12b) by the second inlet valve (11b), outer one end of the second variable cavity (5b) that is positioned at that is positioned at the outer one end of the first variable cavity (5a) and the second inlet valve (11b) and the second outlet valve (12b) of described the first inlet valve (11a) and the first outlet valve (12a) is all positioned between main bearing (3) and secondary bearing (4),

The sidewall (32) that described the first positioning convex (11) and the second positioning convex (21) are centered around main bearing (3) around, described main bearing (3) supports respectively lid (1) by the restriction of the first positioning convex (11) and the second positioning convex (21) oppose side wall (32) and the two ends of sidewall (32) and housing (2) is fixed in pump chamber (16), described main bearing (3) and secondary bearing (4) be provided with cooperatively interact form for holding the outlet plenum (351) of the medium that the first variable cavity (5a) and the second variable cavity (5b) discharge, on described main bearing (3) and/or secondary bearing (4), be also provided with the discharge tube (33) being connected with outlet plenum (351), and discharge tube (33) is interlinked to the outside by outlet (17) and pump chamber (16).

2. a kind of bicavate piezoelectric micropump according to claim 1, it is characterized in that: between described main bearing (3) and secondary bearing (4), be also formed with a noise abatement chamber (20), the entry end of described the first inlet valve (11a) and the second inlet valve (11b) is positioned at noise abatement chamber (20), pump chamber (16) space outer with noise abatement chamber (20), described noise abatement chamber (20) is connected, and described outlet plenum (351) is positioned at noise abatement chamber (20).

3. a kind of bicavate piezoelectric micropump according to claim 2, it is characterized in that: the edge of described secondary bearing (4) is provided with the limiting stopper (42) that has location and keep out the second elastic seal ring (13b) effect, on the sidewall (32) of described main bearing (3), offer the restraining groove (324) cooperatively interacting with limiting stopper (42), and described limiting stopper (42) is formed with a vent (325) with restraining groove (324), described noise abatement chamber (20) is connected by vent (325) pump chamber (16) space outer with noise abatement chamber (20).

4. a kind of bicavate piezoelectric micropump according to claim 1, it is characterized in that: it is upper that described discharge tube (33) is arranged on main bearing (3), described discharge tube (33) extends through sidewall (32) and to outlet (17) direction.

5. a kind of bicavate piezoelectric micropump according to claim 4, it is characterized in that: on the sidewall (32) of described main bearing (3), be also provided be centered around discharge tube (33) around fixed tube (34), between described fixed tube (34) and described discharge tube (33), be formed with and the circular groove (332) that is connected of outlet (17), and described fixed tube (34) is by sealing and export being communicated with of (17) and pump chamber (16) with being tightly connected of lid (1) and housing (2) respectively.

6. a kind of bicavate piezoelectric micropump according to claim 5, it is characterized in that: in described fixed tube (34), be arranged with damping sealing ring (9), described fixed tube (34) is tightly connected by damping sealing ring (9) and lid (1) and housing (2).

7. a kind of bicavate piezoelectric micropump according to claim 5, it is characterized in that: described lid (1) and housing (2) are provided with the recess corresponding to each other, described outlet (17) is that the recess of lid (1) and housing (2) combines, and described discharge tube (33) stretches out to outlet (17) extension.

8. a kind of bicavate piezoelectric micropump according to claim 1, is characterized in that: described discharge tube (33) is cooperatively interacted and formed by main bearing (3) and secondary bearing (4).

9. a kind of bicavate piezoelectric micropump according to claim 1, is characterized in that: described discharge tube (33) is arranged on secondary bearing (4).

10. a kind of bicavate piezoelectric micropump according to claim 1, is characterized in that: described outlet (17) is one, described outlet plenum (351) is one, and described discharge tube (33) is one.

11. a kind of bicavate piezoelectric micropumps according to claim 1, it is characterized in that: described outlet (17), outlet plenum (351) and discharge tube (33) are two, and two outlet plenums (351) and two discharge tubes (33) are corresponding and be communicated with one by one, two discharge tubes (33) are corresponding one by one with two outlets (17), the medium flowing out by the first outlet valve (12a) flows to one of them outlet plenum (351), the medium flowing out by the second outlet valve (12b) flows to another outlet plenum (351), two discharge tubes (351) are interlinked to the outside by corresponding outlet (17) and pump chamber (16) respectively.

12. a kind of bicavate piezoelectric micropumps according to claim 1, it is characterized in that: between the described first pre-splenium (12) and the first piezoelectric vibrator (10a), be also provided with the first elastic ring (14a), the described first pre-splenium (12) is pressed on the first piezoelectric vibrator (10a) in advance by the first elastic ring (14a), between the described second pre-splenium (22) and the second piezoelectric vibrator (10b), be also provided with the second elastic ring (14b), the described second pre-splenium (22) is pressed on the second piezoelectric vibrator (10b) in advance by the second elastic ring (14b).

13. a kind of bicavate piezoelectric micropumps according to claim 1, it is characterized in that: on the two ends of the sidewall (32) of described main bearing (3), be respectively equipped with the first opening slot (325) and the second opening slot (326), described lid (1) is provided with the first spacing preiection (15) matching with the first opening slot (325), and described housing (2) is provided with the second spacing preiection (25) matching with the second opening slot (326).

14. a kind of bicavate piezoelectric micropumps according to claim 1, is characterized in that: described the first inlet valve (11a) and the second inlet valve (11b), the first outlet valve (12a) and the second outlet valve (12b) are staggeredly arranged each other on corresponding main bearing (3) and secondary bearing (4).

15. a kind of bicavate piezoelectric micropumps according to claim 1, it is characterized in that: the first piezoelectric vibrator (10a) and the second piezoelectric vibrator (10b) include conductive substrate and cover the piezoelectric constant with conductive coating on conductive substrate, the distribution that is mutually symmetrical of described the first piezoelectric vibrator (10a) and the second piezoelectric vibrator (10b), the conductive substrate of described the first piezoelectric vibrator (10a) and the second piezoelectric vibrator (10b) is electrically connected with the one-level of ac power supply, the conductive coating of the piezoelectric constant of described the first piezoelectric vibrator (10a) and the second piezoelectric vibrator (10b) is electrically connected with another level of ac power supply.

16. according to claim 1-2, a kind of bicavate piezoelectric micropump in 8-15 described in any one claim, it is characterized in that: described the first positioning convex (11) and the second positioning convex (21), the first pre-splenium (12) is identical with the second pre-splenium (22) and mutually corresponding, described the first elastic seal ring (13a) and the second elastic seal ring (13b), the first piezoelectric vibrator (10a) is mutually the same with the second piezoelectric vibrator (10b), as a whole can forward after described main bearing (3) and secondary bearing (4) cooperatively interact and be oppositely assemblied in the pump housing (16).