CN201221457Y - Valve and vibrator integrated piezoelectric pump with valve - Google Patents

Abstract

A valve-vibrator integrated valve piezoelectric pump belongs to the field of fluid machinery. Valved piezoelectric pumps have higher working efficiency than valveless piezoelectric pumps, but their structure is more complicated than that of valveless piezoelectric pumps. There needs to be enough space in the pump chamber to assemble two or at least one valve to control the flow of liquid. The utility model is characterized in that: two piezoelectric vibrators (8) are installed on the suction port and the discharge port of the pump along the fluid flow direction; the piezoelectric vibrator is composed of a metal sheet with a through hole in the middle, an annular piezoelectric ceramic sheet and a valve The annular piezoelectric ceramic sheet is coaxially bonded to the metal sheet, and the valve is coaxially installed on the opposite side of the metal sheet and the annular piezoelectric ceramic sheet; or the valve is installed on the same side as the annular piezoelectric ceramic sheet, and the valve is installed on the holes in the piezoceramics. The utility model has a simple structure, can greatly reduce the volume of the pump cavity, and increase the flow rate of the pump.

Description

A kind of valve and vibrator integrated piezoelectric pump with valve

Technical field

The utility model relates to a kind of valve and vibrator integrated piezoelectric pump with valve, belongs to field of fluid machinery.

Background technique

Being used for liquid delivery pump mainly can be categorized as: positive displacement pump and drum pump.At present, piezoelectric pump belongs to positive displacement pump mostly.Piezoelectric pump is because of its electromechanical conversion efficiency height, and no chemistry and electromagnetic pollution are so have broad application prospects in fields such as medical treatment, health, health cares.The no-trump piezoelectric pump that has according to pump valve is categorized as again: valve piezoelectric pump and Valveless piezoelectric pump are arranged.Have valve piezoelectric pump to rely on the flow direction of valve controlling liquid, inhaling journey during the halftime when pump work, suction valve is opened, and expulsion valve cuts out; When pump work in scheduling during the halftime, suction valve closure, expulsion valve is opened.Liquid does not have to reflux substantially, and working efficiency is higher, but structure is than valveless press pump complexity, the valve that needs two at least one controlling liquid of assembling to flow to, and pump chamber need provide the space for the installation of valve, so pump chamber and the pump housing are difficult for reducing.Fig. 1 is a kind of valve piezoelectric pump that typically has.

Valveless piezoelectric pump makes that the piezoelectric pump structure is simpler because saved the action valve body of making complexity, and processing and fabricating is easy.The support of the piezoelectric vibrator of Valveless piezoelectric pump is the pattern that adopts metal substrate to be fixed by periphery mostly, wherein typical a kind of is conical flow pipe Valveless piezoelectric pump, because it does not have valve, rely on special pump chamber or the tube flowing structure controlling liquid one-way flow on macroscopic view of shape.Fig. 2 is typical conical flow pipe Valveless piezoelectric pump.It has adopted a pair of inverted conical flow pipe, because the flow resistance of liquid when large port flows to portlet is different with the resistance that flows to large port from portlet, periodically inhale in journey, the scheduling process at pump and to produce difference in flow, thereby on macroscopic view, show as one-way flow.By the working principle of valveless press pump as can be known, its working efficiency has valve piezoelectric pump much lower.

The model utility content

It is a kind of simple in structure that the purpose of this utility model is to provide, need on pump chamber, not assemble the valve piezoelectric pump that has of two at least one valves, overcoming the above-mentioned defective that has valve piezoelectric pump pump chamber volume to be difficult for reducing, and can increase substantially a kind of valve and vibrator integrated piezoelectric pump with valve of pump duty.

A kind of valve and vibrator integrated piezoelectric pump with valve that the utility model provides, as shown in Figure 3, piezoelectric vibrator (8) connects firmly with pump chamber, and it is characterized in that: piezoelectric vibrator 8 self has valve 3, can rely on the inside and outside variation in pressure of pump chamber and opening and closing; Two such piezoelectric vibrator 8 longshore current directions of flow are installed on pump intake and the exhaust port in the same way; The structure of piezoelectric vibrator 8 as shown in Figure 4, by the tinsel 1 of centre band through hole, ring piezoelectric ceramic plate 2 and valve 3 combine as shown in Figure 5; Ring piezoelectric ceramic plate 2 is coaxial bonding with tinsel 1; Valve 3 is that a sheet material stamping-out goes out otch and makes, and otch is not communicated with, and it is divided into motion and standstill two-part with valve 3, and motion parts is the part that otch contains, and other parts are stationary part.Stationary part and tinsel 1 are bonding, and motion parts closes the through hole in the middle of the tinsel 1, and it can open or close according to the pressure size and Orientation that acts on thereon by the hole.Thereby formation valve.These two-part link at the otch two ends, and coupling part rigidity is very low, to guarantee the opening and closing smoothly under pressure of valve motion part.

Valve 3 is coaxial to be installed in the relative opposite side of tinsel 1 and ring piezoelectric ceramic plate 2, if the hole at ring piezoelectric ceramic plate 2 middle parts is enough big, valve 3 also can be installed with ring piezoelectric ceramic plate 2 homonymies, is installed in the hole of ring piezoelectric ceramic plate 2.At this moment, the flow direction of valve 3 control fluids is opposite with above-mentioned installation method.

Piezoelectric vibrator 8 can also have another kind of structure, as shown in Figure 6, and orifice plate tinsel 9 and the annular valve 10 of making annular, the 11 coaxial assemblings of circular piezoelectric oscillator.It is porose to distribute on the orifice plate tinsel 9, and annular valve 10 is for to go out several otch with the mode of stamping-out on the sheet material of an annular, and otch is divided into motion parts and stationary part with valve.The part that otch contains is a motion parts, and all the other are stationary part.Stationary part and orifice plate tinsel 9 are bonding, and motion parts closes the hole on the orifice plate tinsel 9, and its can be according to acting on the size and Orientation of hydrodynamic pressure thereon and opening and closing by the hole, thereby form valve.Circular piezoelectric oscillator 11 is assemblied in the ring of annular valve 10.Orifice plate tinsel 9, annular valve 10 is shown in Fig. 7 a.

Fig. 8 is the suction journey fundamental diagram of this pump.Two piezoelectric vibrators in the pump are applied the opposite alternating voltage of phase place, and under the effect of alternating voltage, piezoelectric vibrator is done periodically back and forth buckling deformation.Inhaling journey in the halftime, owing to the voltage on two piezoelectric vibrators is opposite, the left side piezoelectric vibrator is out of shape to the left, and the right side piezoelectric vibrator is out of shape to the right, the volume of pump chamber increases, the pump chamber internal pressure reduces, when internal pressure is lower than external pressure, because structural design features, valve open on the piezoelectric vibrator of right side, and the valve closing on the piezoelectric vibrator of left side, along with the reduction of cavity pressure and the unlatching of right side valve, outside liquid flows into pump chamber from the right side of pump; Along with variation of AC voltage, two piezoelectric vibrators begin to be out of shape round about, pump has entered the scheduling halftime, as shown in Figure 9, in scheduling, the left side piezoelectric vibrator is out of shape to the right, the right side piezoelectric vibrator is out of shape to the left, and the volume of pump chamber diminishes, the increased pressure in the chamber, when internal pressure is higher than external pressure, since structural design features, the valve open on the piezoelectric vibrator of left side, and the valve closing on the piezoelectric vibrator of right side, along with the unlatching with the left side valve of increasing of pump chamber internal pressure, the liquid in the pump chamber flows out to the left side of pump in pump chamber; Under the effect of alternating voltage, more than to inhale journey and scheduling and alternately occur, pump has been transported to liquid the left side of pump from the right side of pump.

Used the novel piezoelectric oscillator in the utility model, make valve piezoelectric pump both save two valves installing on the conventional piezoelectric pump middle pump body, two piezoelectric vibrators have been installed in the pump chamber of equal volume again, working efficiency increases substantially, thereby makes this pump have more wide actual application prospect.

Description of drawings

Fig. 1 has the valve piezoelectric pump schematic representation;

Fig. 2 conical flow pipe Valveless piezoelectric pump schematic representation;

A kind of valve and vibrator integrated piezoelectric pump with valve structural drawing of Fig. 3 the utility model;

Fig. 4 (a) piezoelectric vibrator plan view; Fig. 4 (b) piezoelectric vibrator left view;

Fig. 5 (a) valve 3; Fig. 5 (b) ring piezoelectric ceramic plate 2; Fig. 5 (c) tinsel 1;

The another kind of structural front view of Fig. 6 (a) piezoelectric vibrator 8; Fig. 6 (b) piezoelectric vibrator 8 another kind of structure left views;

The annular valve 10 of Fig. 7 (a); Fig. 7 (b) orifice plate tinsel 9;

A kind of valve and vibrator integrated piezoelectric pump with valve of Fig. 8 the utility model is inhaled the journey fundamental diagram;

A kind of valve and vibrator integrated piezoelectric pump with valve scheduling of Fig. 9 the utility model fundamental diagram.

Among the figure: 1, tinsel, 2, the ring piezoelectric ceramic plate, 3, valve, 4, bolt, 5, pump cover, 6, the pump housing, 7, seal washer, 8, piezoelectric vibrator, 9, the orifice plate tinsel, 10, annular valve, 11, the circular piezoelectric oscillator.

Embodiment

Embodiment of the present utility model is referring to Fig. 3～5, two pump covers 5 are fixed on piezoelectric vibrator 8 in the pump housing 6 by seal washer 7 and six bolts 4, annular sheet metal 1 in the piezoelectric vibrator 8 is that 0.1mm is thick, external diameter 30mm, the latten of internal diameter 4mm, ring piezoelectric ceramic plate 2 external diameter 20mm, internal diameter 5mm; Valve 3 is made for the sheet rubber of 0.2mm.

Two piezoelectric vibrators insert the opposite 220V of phase place, 50Hz alternating voltage, the work of drive pressure electric pump in this enforcement.The flow of pump reaches 650mL/min.

Claims (1)

1. A valve-vibrator integrated valve piezoelectric pump, the piezoelectric vibrator (8) is fixedly connected with the pump cavity, and it is characterized in that: two piezoelectric vibrators (8) are installed in the suction port and the pump chamber in the same direction along the fluid flow direction. On the discharge port; the piezoelectric vibrator (8) is composed of a metal sheet (1) with a through hole in the middle, an annular piezoelectric ceramic sheet (2) and a valve (3); The annular piezoelectric ceramic sheet (2) is coaxially bonded to the metal sheet (1), and the valve (3) is made by punching out a disconnected cut from a piece of plate material. The cut divides the valve (3) into two parts, the moving part and the static part. , the moving part is the part contained by the slit, and the other parts are the static part; the static part is bonded to the metal sheet (1), and the moving part seals the through hole in the middle of the metal sheet (1); The valve (3) is coaxially installed on the opposite side of the metal sheet (1) and the annular piezoelectric ceramic sheet (2); or the valve (3) is installed on the same side as the annular piezoelectric ceramic sheet (2), and the valve (3) Installed in the hole of the piezoelectric ceramic sheet (2); Or the piezoelectric vibrator (8) is coaxially assembled by an orifice metal sheet (9), an annular valve (10), and a circular piezoelectric vibrator (11); the annular valve (10) is punched out on an annular plate. punch out several disconnected cuts, the cuts divide the valve into a moving part and a static part, the part contained by the cut is the moving part, and the rest is the static part; the static part is bonded to the orifice metal sheet (9), and the moving part Close the holes on the orifice metal sheet (9); holes are distributed on the orifice metal sheet (9), and the moving part of the ring valve (10) covers the holes of the orifice metal sheet (9); the circular piezoelectric vibrator (11) fits in the ring of the ring valve (10).

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