CN105626488A - Sine and cosine linear valve piezoelectric pump - Google Patents

The invention relates to a sine and cosine linear valve piezoelectric pump. The sine and cosine linear valve piezoelectric pump comprises a piezoelectric vibrator (1), a pump cover (2), a valve seat (3), screws (4), a pump seat (6), a sealing ring (7), a sealing ring (8) and screws (9), wherein the pump cover (2) is arranged on the top of the pump seat (6); the valve seat (3) is arranged at the upper end of the pump seat (6); the sealing ring (7) is arranged between the valve seat (3) and the pump seat (6); the sealing ring (8) is arranged between the valve seat (3) and the pump cover (2); the piezoelectric vibrator (1) is arranged on the top of the valve seat (3), is arranged between the valve seat (3) and the pump cover (2), and is fixedly connected with the pump cover (2), the valve seat (3) and the pump seat (6) through the screws (9); and a pair of sine and cosine linear one-way valves (5) inverted to each other is respectively mounted at an inlet and an outlet of the valve seat (3) through the screws (4). The sine and cosine linear valve piezoelectric pump has the advantages of high efficiency, large flow, simple structure, convenience in installation, low cost and the like.

The linear valve piezoelectric pump of sine and cosine

Technical field

The present invention relates to the linear valve piezoelectric pump of sine and cosine, belong to field of fluid machinery.

Background technology

Pump is conveyance fluid or the machinery of transmission energy. Traditional pump is usually and is driven by motor. No matter in theory, in method for designing or manufacturing technology, reach very perfect degree. But the restriction by operation principle and structure, if desired for additional drives motor, then volume is relatively big, by electromagnetic interference, wayward tiny flow quantity, thus it is difficult to meet the application demand of current aerospace spacecraft, robot, automobile, medical apparatus and instruments, biological gene engineering, micromachine.

Piezoelectric pump is a kind of novel fluid driver. It does not need additional drives motor, but utilizes the inverse piezoelectric effect of piezoelectric ceramics to make piezoelectric vibrator be deformed, then is realized fluid output by the volume change of deformation generation pump chamber or utilize piezoelectric vibrator generation fluctuation to transmit liquid.

Piezoelectric pump has the feature not available for conventional pump, the drive source part of conventional pump, running part and pump housing three can be integrated, simple in construction can be realized, volume is little, lightweight, it is low to consume energy, noiseless, without electromagnetic interference, can according to apply voltage or FREQUENCY CONTROL output tiny flow quantity. Invention that let it be to the greatest extent and the history developing only more than 30 year, the application succeeded in above-mentioned field.

Piezoelectric pump of a great variety, form is different, according to different criteria for classification classification differences. Can be divided into from the presence or absence of valve body and have valve piezoelectric pump and Valveless piezoelectric pump; Can be divided into from the type of drive of valve body opening and closing active has valve piezoelectric pump and passive type to have valve piezoelectric pump. Valve piezoelectric pump is had to be often referred to the inlet and outlet being separately mounted to pump by a pair mutual inverted check valve, for controlling the flow direction of fluid. The opening and closing of the active valve body having valve piezoelectric pump needs to come the unlatching of application valve body with additional driving power supply and control equipment, adds the design of piezoelectric pump, installation and controlling unit. Passive type have valve piezoelectric pump to refer in piezoelectric pump, the opening and closing of valve body is to open and close valve body by the periodically variable pressure of pump chamber in the working cycle of piezoelectric pump, thus realizing the effect of pump.

Up to now, there is valve piezoelectric pump to invent a lot of version, have been obtained for being widely applied. The function having valve piezoelectric pump is mainly realized by the check valve controlling the fluid flow direction, and therefore, piezoelectricity pump performance is had conclusive impact by the structure of check valve. Tradition has the check valve of valve piezoelectric pump to be simple cantilever beam shape, it is a lot of that its opening and closing lag behind piezoelectric pump drive source, gap is easily there is between execution part and the valve seat of valve, cause that the property followed and cut-off property are bad, and the Oscillation Amplitude of the power source piezoelectric ceramics of piezoelectric pump is very low, so the frequency of piezoelectric pump, flow and pressure just do not increase. In order to solve these problems, Crinis Carbonisatus is had to understand soft funnel shaped valve, chevron valve, wheeled flap type etc. But these valves still have limitation, such as funnel shaped valve needs space big, and manufacturing procedure is complicated, and cost is high; The area of chevron valve is big; Wheeled flap type valve block is complicated with the technique for fixing of valve seat, it is easy to the bad of valve block flatness occur, the cutoff performance reduction etc. of valve.

Summary of the invention

In order to overcome have that valve piezoelectric pump structure is complicated, followability and cut-off is bad, high in cost of production shortcoming, it is an object of the invention to provide a kind of linear valve piezoelectric pump of sine and cosine, inlet and outlet at valve seat is separately installed with a pair mutual linear check valve of inverted sine and cosine, for controlling the flow direction of fluid. When inhaling journey, piezoelectric vibrator is bent upwards, and the volume of pump chamber becomes big pressure and reduces, the linear one-way valve opens of sine and cosine of import department and the closedown in exit, and such fluid just flows into pump chamber; When scheduling, piezoelectric vibrator is bent downwardly, the volume of pump chamber diminish pressure raise, the linear closed check valve of sine and cosine of import department, opening of exit, such fluid just from exit outflow. Through inhaling journey and one complete cycle of scheduling, pump is achieved that the one-way transmission of fluid. This pump has that efficiency height, flow be big, simple in construction, easy for installation, low cost and other advantages.

The technical solution adopted for the present invention to solve the technical problems is: a kind of linear valve piezoelectric pump of sine and cosine, including piezoelectric vibrator, pump cover, valve seat, screw, pump seat, sealing ring, described pump seat top is provided with pump cover, pump seat upper end is valve seat, sealing ring it is provided with between valve seat and pump seat, sealing ring it is provided with between pump seat and pump cover, pump seat top is provided with piezoelectric vibrator, described piezoelectric vibrator is located between pump seat and pump cover, described piezoelectric vibrator and pump cover, connect by screw is fixing between valve seat and pump seat, inlet and outlet at valve seat is separately installed with a pair mutual linear check valve of inverted sine and cosine by screw, the valve body of the linear check valve of described sine and cosine is corresponding with the inlet hole of valve seat and outlet opening, the linear check valve of sine and cosine being arranged on valve seat import department by screw is inlet valve, the linear check valve of sine and cosine being arranged on valve seat exit by screw is dump valve.

The linear check valve of sine and cosine of the present invention is arranged on the import and export of valve seat by screw by localizer, and the valve body of the linear check valve of sine and cosine is corresponding with the import and export of valve seat; The shape of the valve body of the linear check valve of described sine and cosine and the mating shapes of flow hole, it is sized larger than the size of flow hole; Be connected by the linear cantilever of sine and cosine between valve body and the localizer of the linear check valve of described sine and cosine, the linear cantilever of this sine and cosine be shaped as sinusoidal line or cosine line; The linear check valve of described sine and cosine is made up of elastic metallic or nonmetallic materials.

After adopting above technical scheme, the invention has the beneficial effects as follows: the linear check valve of sine and cosine belongs to cantilever valve, simple in construction, cost is low, and its cantilever shape is the trigonometric function line including but not limited to sinusoidal line or cosine line, brachium exceeds several times than traditional cantilever beam check valve, thus its being quick on the draw to the change of pump chamber pressure, followability is good, and this valve can be made up of metal or non-metallic elastic material, there is good cutoff performance, it is possible to effectively realize the opening and closing of piezoelectric pump.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the invention will be further described.

Fig. 1 is the linear structural representation having valve piezoelectric pump of sine and cosine of the present invention.

Fig. 2 is the linear top view having valve piezoelectric pump of sine and cosine of the present invention.

Fig. 3 is the sectional view of the linear check valve front view of sine and cosine of the present invention.

Fig. 4 is the top view of the linear check valve of sine and cosine of the present invention.

The state diagram that when Fig. 5 is fluid Xi Cheng of the present invention, the linear one-way valve opens exit of import department's sine and cosine is closed.

The state diagram that when Fig. 6 is fluid scheduling of the present invention, sine and cosine linear one-way valve opens porch in exit is closed.

Fig. 7 is the linear fundamental diagram having valve piezoelectric pump of sine and cosine of the present invention.

Detailed description of the invention

According to Fig. 1, Fig. 2, Fig. 3, shown in Fig. 4, the linear valve piezoelectric pump of one sine and cosine of the present invention, including piezoelectric vibrator 1, pump cover 2, valve seat 3, screw, pump seat 6, sealing ring, described pump seat 6 top is provided with pump cover 2, pump seat 6 upper end is valve seat 3, sealing ring 7 it is provided with between valve seat 3 and pump seat 6, sealing ring 8 it is provided with between pump seat 6 and pump cover 2, valve seat 3 top is provided with piezoelectric vibrator 1, described piezoelectric vibrator 1 is located between valve seat 3 and pump cover 2, described piezoelectric vibrator 1 and pump cover 2, connect by screw 9 is fixing between valve seat 3 and pump seat 6, inlet and outlet at valve seat 3 is separately installed with a pair linear check valve 5 of mutual inverted sine and cosine by screw 4, the valve body 11 of the linear check valve of described sine and cosine 5 is corresponding with the inlet hole of valve seat 3 and outlet opening, the linear check valve 5 of sine and cosine being arranged on valve seat 3 import department by screw 4 is inlet valve, the linear check valve 5 of sine and cosine being arranged on valve seat 3 exit by screw 4 is dump valve.

The linear check valve 5 of sine and cosine of the present invention is arranged on the import and export of valve seat 3 by screw 4 by localizer 10, and the valve body 11 of the linear check valve of sine and cosine 5 is corresponding with flow hole, and it is sized larger than the size of flow hole; The mating shapes of the shape of the valve body 11 of the linear check valve 5 of described sine and cosine and the flow hole of valve seat 3, the shape of the valve body 11 of the linear check valve 5 of described sine and cosine and the flow hole of valve seat 3 can be circular, it is also possible to for other geometry; It is connected by the linear cantilever 12 of sine and cosine between valve body 11 and the localizer 10 of the linear check valve of described sine and cosine 5, the trigonometric function line being shaped as including but not limited to sinusoidal line or cosine line of the linear cantilever of this sine and cosine; The linear check valve 5 of described sine and cosine is made up of metal or non-metallic elastic material, as: beryllium-bronze or spring steel.

According to Fig. 5, Fig. 6, it is inlet valve that the linear check valve 5 of sine and cosine of the present invention is arranged within valve seat 3 inlet hole with screw 4, it is dump valve that the linear check valve 5 of sine and cosine is arranged on outside valve seat 3 outlet opening with screw 4, when pump chamber change causes cavity fluid pressure to change, the linear check valve of sine and cosine 5 can realize unidirectional opening and closing under action of a fluid.

According to Fig. 7, the fundamental diagram of the linear valve piezoelectric pump of sine and cosine of the present invention, during piezoelectric pump work, piezoelectric vibrator 1 is applied ac signal, under the incentive action of the signal of telecommunication, piezoelectric vibrator 1 produces cyclic bending deformation vibration, causes pump chamber volume and pressure alternate, and sine and cosine is linear has the work process of valve piezoelectric pump as follows:

First stage (0 ~ 1/4T), along with the continuous increase of voltage, piezoelectric vibrator 1 is constantly bent upwards by equilbrium position and moves to extreme position, pump chamber volume increases to maximum, there is negative pressure in intracavity, and the valve body 11 of the linear check valve 5 of sine and cosine of valve seat 3 import department is opened, and fluid is flowed into pump chamber by inlet hole.

Second stage (1/4T ~ 2/4T), in this process, voltage constantly reduces, the deflection of piezoelectric vibrator 1 reduces, pump chamber volume also constantly reduces, intracavity pressure constantly increases, and the valve body 11 of the linear check valve 5 of sine and cosine of valve seat 3 import department is close to the upper end of valve seat 3 import under the effect of the pressure, closes import.

Phase III (2/4T ~ 3/4T), piezoelectric vibrator 1 is done downwards curvature movement to minimum point along with the increase of voltage by equilbrium position, and pump chamber volume constantly reduces, and cavity pressure increases to maximum, the valve body 11 of the linear check valve 5 of sine and cosine in valve seat 3 exit is opened, and fluid is flowed out pump chamber by outlet opening.

Fourth stage (3/4T ~ T), in this stage, voltage on piezoelectric vibrator constantly reduces, the deflection of piezoelectric vibrator 1 constantly reduces, pump chamber volume increases, intracavity pressure constantly reduces, and the valve body 11 of the linear check valve 5 of sine and cosine in valve seat 3 exit is close to the lower end of outlet under the effect of the pressure, closes import.

When piezoelectric vibrator 1 moves along S4 �� S1 �� S2, pump chamber is in diastole state, and pump chamber volume increases, there is negative pressure in intracavity, and now the linear check valve 5 of the sine and cosine in valve seat 3 exit is closed, and the linear check valve 5 of sine and cosine of import department is opened, fluid flows into pump chamber, for the suction journey of pump; When piezoelectric vibrator 1 moves along S2 �� S3 �� S4, pump chamber volume compression, intracavity pressure increases, and now the linear check valve 5 of the sine and cosine of valve seat 3 import department is closed, and the linear check valve 5 of sine and cosine in exit is opened, and fluid flows out pump chamber, for the scheduling of pump. So, within a working cycle, it is achieved that the suction of fluid and discharge.