76results about How to "Large output flow" patented technology

The invention relates to a dual-cavity dual-drive piezoelectric stack pump, and belongs to the field of micro-electrical mechanics. Rough-adjustment pre-tightening nuts and fine-adjustment pre-tightening nuts on the two sides are respectively threaded with a stack supporting body; piezoelectric stacks on the two sides are fixedly adhered to a stack seat and are connected with the rough-adjustment pre-tightening nuts through inclined block pre-tightening devices in a contact way; the piezoelectric stacks are connected with a stack through a lead wire; vibrating diaphragms on the two sides are fixedly adhered to the stack seat; the vibrating diaphragms and valve seats on the two sides form cavities on the two sides respectively; inlet check valves are fixedly connected with the valve seats; outlet check valves are fixedly connected with the valve seats and are connected with a flow channel respectively; and the valve seats on the two sides are fixedly connected with each other through bolts. The dual-cavity dual-drive piezoelectric stack pump has the following advantages of: novel structure, high output flow rate, strong bearing capacity and higher pressure output, and simultaneously has good controllability and output stability.

The invention relates to a proportional flow valve controlled by a pilot flow closed loop, which is provided with a flow sensor consisting of a two-position two-way cartridge valve. The control cavity of a main valve is communicated with the oil inlet of a pilot valve; the oil inlet of the flow sensor is communicated with the oil outlet of the pilot valve; the oil outlet of the flow sensor is simultaneously communicated with the springless oil cavity of the pilot valve and the oil outlet of the main valve; the oil outlet of the flow sensor is communicated with the control cavity of the flow sensor through a damping hole; the control cavity of the flow sensor is communicated with the spring oil cavity of the pilot valve; the valve core of the flow sensor, the valve core of the pilot valve and a flow sensor spring are coaxially arranged; and one end of the flow sensor spring acts on the core end of the pilot valve, while the other end acts on the valve core end of the flow sensor. The proportional flow valve can obtain seven technical schemes by changing communication relations. The proportional flow valve comprises an innovative idea that the flow of the pilot valve is detected by a minitype flow sensor, the flow of the pilot valve is controlled in the way of forming the closed loop and the flow of the main valve is amplified according to a Valvistor valve amplification principle. The proportional flow valve has the advantages of combining two control principle structures of flow closed loops and flow amplification and has the characteristics of simple structure, high flow control precision and high efficiency.

A micro pump free from pulse output and driven by electromagnet comprises the drive coil and drive magnet formed drive, up, middle and lower part formed micro pump, with the up pump having up pump cavity, left conical valve, right conical valve, water inlet hole, water outlet hole, up pump cavity connecting with water inlet and outlet holes through left and right conical valve, drive cavity between the middle pump, drive magnet set inside the drive cavity, fixed with thin film up and down inside the drive cavity, water inlet holes at both sides of the drive cavity, lower pump having pump cavity, left conical valve, right conical valve, water inlet hole, water outlet hole, lower pump cavity connecting with water inlet and outlet holes of two conical valves. It can work at relatively low voltage, with quick influence speed and safety.It can be applicable in medical field.

The invention relates to a single-chamber dual-vibrator piezoelectrical pump, belonging to the mechanical field of micro-electronic fluid. A pump body is fixedly connected between an upper cover and a lower cover; an inlet pipe and an outlet pipe are respectively and fixedly connected with the water inlet and a water outlet of the pump body; the front part of a pump chamber is fixedly connected with a pump chamber driving piezoelectrical vibrator 1; the water inlet of the pump chamber is fixedly connected with a check driven valve 1 or a drive valve 1; the invention is characterized in that the rear of the pump chamber is fixedly connected with a pump chamber piezoelectrical vibrator 2; the water outlet of the pump chamber is fixedly connected with a check driven valve 2 or a drive valve 2. The invention has the advantage that as the piezoelectrical vibrator has the advantages of fast responding, no electromagnetic interference, etc., the two drive vibrators in the pump chamber are led to keep harmonious and consistent, thus increasing the output flux and improving the output performance of the piezoelectrical pump.

The invention relates to a digitally controlled leading type proportional flow valve belonging to a device which controls flow rate of a hydraulic actuator in an electric hydraulic control system. The digitally controlled leading type proportional flow valve mainly solves the technical problems that the existing control valve has high cost, poor oil pollution resisting capacity and low precision. In the technical scheme in the invention, the digitally controlled leading type proportional flow valve comprises a two-position two-way high-speed switch valve and a main valve which consists of a main valve element, a main valve jacket, a main valve spring, a main valve oil inlet PA, a main valve oil outlet PB, a main valve control cavity PC and a flow rate feedback throttling groove WC, further the digitally controlled leading type proportional flow valve also comprises a constant value flow device consisting of a valve element, a valve jacket, a fixed orifice R, a first control cavity VA, a second control cavity VB, a variable throttling side JLB, an oil inlet PA2 of a constant value flow device, and an oil outlet PB2 of the constant value flow device. The digitally controlled leading type proportional flow valve has the advantages of simple structure and strong contamination resistance, and works reliably.

The invention belongs to the technical field of high-pressure water jet cleaning equipment, and in particular relates to a pulse energy storage type high-pressure water jet cleaning system. The system comprises a power distribution device, a high-pressure water pump, a pneumatic energy storage device and a pulse jetting device, wherein the power distribution device is connected with the high-pressure water pump; and the pulse jetting device is connected with the high-pressure water pump through the pneumatic energy storage device. The pulse energy storage type high-pressure water jet cleaningsystem provided by the invention adopts a large-flow high-pressure water pump and technical measures of pulse jetting, pneumatic energy storage and aerification cavitation erosion, effectively improves the impact force and crushing capability of water jet, and has the characteristics of strong impact force of water jet, large output flow and capability of adapting large-scale cleaning operation.

The invention discloses a mass flow high-frequency direct-acting electro-hydraulic servo valve based on a great magnetostriction converter, and belongs to the technology field of hydraulic servo control. The mass flow high-frequency direct-acting electro-hydraulic servo valve comprises a valve body (24), a great magnetostriction converter arranged above the valve body (24), a micrometric displacement mechanism, a shell (4), and slide valve resetting and balancing devices. The micrometric displacement mechanism and the shell (4) are arranged on the left sides of the valve body (24) and the great magnetostriction converter, and the slide valve resetting and balancing devices are arranged inside and on the left side of the valve body (24). A pre-compression mechanism, a cooling system and a heat compensation mechanism are arranged on the great magnetostriction converter, amplification and transmission of outputted displacement are realized by utilizing the micrometric displacement mechanism based on a leverage theory, a valve plug is driven to generate displacement, and the servo valve is enabled to output control flow in proportion with drive current. The servo valve has the advantages of quick response, wide bandwidth, big control flow, strong anti-pollution capacity and the like.

The invention relates to a valve, particularly relates to an excitation valve, and belongs to the field of hydraulic control in the fluid power transmission and control field. The technical scheme includes that the excitation valve comprises a valve body, a valve element, a left end cover and a right end cover, and is essentially a three-position four-way electrically-driven reversing valve, the three-position four-way electrically-driven reversing valve has a left position, a middle position and a right position and is provided with a control port A, a main oil inlet, a control port B and an oil return port T, a throttle shoulder, a control shoulder A, a control shoulder B and a high-pressure shoulder which are respectively provided with wavy grooves are sequentially arranged on the valve element from left to right, the valve element extends out of an opening in the right end cover, and a key slot is formed in the extending end of the valve element. Torque is connected into the excitation valve via the key slot, so that the valve element can rotate and further can axially reciprocate, and oil inlet directions of the control port A and the control port B can be changed. Compared with the traditional pilot-operated electromagnetic valve or 2D (two-dimensional) high-frequency excitation valve, the excitation valve has the advantages of simplicity in control, high flow, applicability to specific vibration test benches and wide range of engineering application places.

Profiles of screw rods of a double screw rod air compressor are involved. One of the said screw rods is of single-start thread and another is of three-start one. The top curve in radial section of the said rods is a part of circle with zero as extreme value. The root curve on the opposite of the said rods is a part of circle too. Between one end point of the top curve and one end point of the root curve a general cycloid line is formed symmetrically. The radium of the top curve is three times as one of the root curve. The guiding range of the three-start rod is three times as one of the single-start rod. This design has short sealing line, less leakage, higher pressure, and greater exhaust volume, working efficiently.

The invention discloses a proportional flow unit under compound control of electromagnetic switch valves and a proportional throttle valve in parallel. The proportional flow unit comprises a Valvistor main valve and a digital continuous compound flow control unit, the digital continuous compound flow control unit is formed by connecting one two-position two-way electromagnetic proportional valve and multiple two-position two-way electromagnetic valves in parallel to be used as a pilot valve, and the flow of the two-position two-way electromagnetic proportional valve is smaller than or equal to that of the two-position two-way electromagnetic valve of the smallest specification among all the two-position two-way electromagnetic valves. The proportional flow unit under compound control of the electromagnetic switch valves and the proportional throttle valve in parallel has the advantages of an existing digital flow control unit technology, and can achieve continuous flow control and meet the requirement for very large flow and anti-explosion application.

The invention discloses a device utilizing multi-component liquid to perform mixing and constant-temperature corrosion preventive spraying. A constant-temperature heater coil and a temperature sensor connected with the constant-temperature heater coil are arranged in a material feeding barrel of the device, a used AC variable frequency motor is fixedly and axially connected with an oil hydraulic pump, the AC variable frequency motor receives signals of a pressure sensor via a frequency conversion controller to adjust revolving speed, and a rubber tube heating coil is winded on a rubber tube to control temperature of the rubber tube via the other temperature sensor. A hybrid tube is fixedly connected with a nozzle boss via a thread, and the nozzle boss can be changed rapidly.

In the present invention, a first high pressure sensing device is connected to the air inlet of the main valve, and a second high pressure transducing device is connected to the air outlet of the main valve. The air inlet end of the first high pressure pneumatic switch valve is connected with the air inlet chamber of the main valve, and the exhaust end is connected with the pressure-regulating chamber of the main valve. The air inlet end of the second high pressure pneumatic switch valve is connected with the pressure-regulating chamber of the main valve, and the exhaust end is connected with the exhaust chamber of the main valve. The holding wire of the first and second high pressure transducing units and the electromagnetic control wire of the first and second high pressure pneumatic switch valves are connected with the display unit and the control part. The air in the pressure-regulating chamber is used for controlling the opening of the main valve so as to realize throttling.

The invention relates to a pilot type proportional flow valve. The valve comprises a proportional pilot valve communicating with a pilot cavity of a main valve, wherein a differential pressure compensator is arranged between the main valve and the proportional pilot valve, the differential pressure compensator compensates inlet and outlet differential pressure of the proportional pilot valve, thedifferential pressure compensator is an active control type differential pressure compensator, a valve element linear control device and a valve element displacement real-time detection device are arranged, a signal output port of the valve element displacement real-time detection device is connected with a processor, and the processor is connected with and controls the valve element linear control device. The valve solves the problems of large fluctuation of flow and poor stability caused by small pressure change due to the fact that a valve port adopts a method of correcting closed-loop control flow by a differential pressure sensor, the control precision of a pressure sensor is limited, the pressure sensor needs a large working range, but the compensation differential pressure is relatively small and is in the same order of magnitude as a system in pressure fluctuation.

The invention discloses a well drilling type artificial upwelling coral protecting method and device and belongs to the technical field of marine ecological environment protection. The method includesthe steps of firstly, drilling to an underground covering layer; secondly, placing an upwelling pipe in the well, and regulating the lower end of upwelling pipe until the lower end reaches a water-bearing stratum; thirdly, mounting a well cover plate on wellhead seabed to fix the upwelling pipe; fourthly, injecting gas into the upwelling pipe through a gas injecting system to continuously liftingthe water of the underground water-bearing layer to the surface layer. By using underground cold water discharged from the upwelling pipe to irrigate corals, the coral bleaching problem caused by temperature rising can be solved.

The invention relates to a high speed switch valve, in particular to a water-base hydraulic electrostriction high speed switch valve and belongs to the technical field of hydraulic transmission. The water-base hydraulic electrostriction high speed switch valve comprises a water hydraulic high speed switch valve, a left electrostriction driver and a right electrostriction driver. The left electrostriction driver and the right electrostriction driver are arranged at the left end and at the right end of the water hydraulic high speed switch valve symmetrically. The electrostriction drivers are composed of output rods, pressing covers, electrostriction rods, sleeves, casings, temperature compensating plates and bases. The hydraulic high speed switch valve is composed of a valve core, a valve sleeve, a retaining ring, a sealing ring, a spring, an end cover and a valve body. The water-base hydraulic electrostriction high speed switch valve solves the problem of contradiction among high pressure, high frequency response and large flow well and simultaneously solves the problem that output displacement of the drivers is enlarged, temperature change effects are large and the like.

The invention discloses an electro-hydraulic servo valve suitable for a large g value acceleration environment. The electro-hydraulic servo valve comprises a servo valve body and a valve block. The servo valve body comprises a first servo valve body and a second servo valve body. The first servo valve body and the second servo valve body are of the same structure and installed on the valve block side by side. The axial direction of valve cores is the same as the centrifugal acceleration direction of a centrifugal machine. The S port of the first servo valve body is communicated with the S port of the second servo valve body through a channel in the valve block. Through the direct drive mode and the connection mode of the first servo valve body and the second servo valve body, it is guaranteed that the valve core of the first servo valve body and the valve core of the second servo valve body are still located in the neutral position under a centrifugal field, centrifugal force is compensated, high-frequency-response servo control can be provided under the large g value centrifugal field, and the defect that a common servo valve is easily affected by centrifugal acceleration or can not work under the centrifugal environment is overcome; a direct drive large-flow slide valve is adopted, links are few, frequency characteristics are high, and wave form distortion is small.

The invention discloses a pressure vacuum control pump. The pressure vacuum control pump comprises a pump body, an eccentric wheel, a motor, a vacuum piston rod, a pressure piston rod and a vacuum container, wherein the eccentric wheel is rotationally arranged on the pump body, the motor is used for driving the eccentric wheel to rotate, the vacuum piston rod and the pressure piston rod are drivenby the eccentric wheel to do reciprocating rectilinear motion, the vacuum container is arranged on the pump body, the vacuum container is provided with a vacuum cavity and a pressure cavity which areisolated from each other, the pump body is provided with a vacuum piston cavity and a pressure piston cavity, the vacuum piston cavity and the pressure piston cavity are arranged on the two differentsides of the eccentric wheel correspondingly, and the vacuum piston rod can be axially arranged in the vacuum piston cavity in a sliding mode. The pressure vacuum pump integrates two functions of a vacuum pump and a pressure pump, and can simultaneously output vacuum and pressure, the pressure vacuum control pump is large in output flow, small in noise, small and compact in structure and capableof cooperating with a small medical instrument such as an oxygenerator for use.

The invention relates to an externally-engaged spherical gear pump which comprises a pump body (1), a male-tooth gear (2), a female-tooth gear (3), a driven shaft (4), a driving shaft (5), a rear pump cover (6), positioning pins (7), a bearing cover (8) and a front pump cover (9). The tooth shape of the male-tooth gear (2) is a convex spherical gear, and the tooth shape of the female-tooth gear (3) is a concave spherical gear engaged with the convex spherical gear of the male-tooth gear (2). The work tooth face of the male-tooth gear and the work tooth face of the female-tooth gear are a spherical convex-tooth gear profile and a spherical concave-tooth gear profile correspondingly, the volume change quantity of an oil absorption cavity is large, the circular arc radius of the convex-tooth gear profile is equal to that of the concave-tooth gear profile, therefore the gear tooth contact strength is high, the inter-tooth load is small, the output flow is large, flowing the pulse is small, noise is low, and steadiness of pump operation and the service life are both superior to those of a traditional gear pump adopting an involute gear profile.

A balance pump for heat supply comprises a receiving tube, a mixing tube, and a jet flange and a jet nozzle which are coaxially arranged, wherein the mixing tube is an integral body formed by sequentially connecting a drainage taper pipe, a throat pipe and a diffuser pipe end to end, the jet flange is installed at the front end of the jet nozzle and communicates with a central through hole of thejet flange, the tail end of the jet nozzle is stretched into the drainage taper pipe and suspended in the drainage taper pipe, the front end of a pipe body of the receiving pipe is fixed on the jet flange, the tail end of the pipe body of the receiving pipe is fixed on the outer side wall of the throat pipe, the jet nozzle is placed in the receiving pipe, a jet guiding inlet is formed in a position, corresponding to the throat pipe, on the side wall of the throat pipe, and connected with the jet guiding pipe in communication mode, a plurality of drainage channels are symmetrically formed in the periphery of the central through hole in the jet flange, a regulation water inlet is formed in the side wall of the tail segment of the diffuser pipe, a regulation water outlet communicates with theregulation water inlet through a regulation pipe, and bolts are arranged on the drainage channels in threaded connection mode, and block the drainage channels or regulate the size of the regulation water outlet. The balance pump for the heat supply can solve the problems that an existing balance valve or regulating valve is large in debugging difficulty, limited in installation and single in function, a water mixing device is long and the like.

The invention relates to a multistage sewage electro-flocculation treatment system which comprises a water pump, a host device, a sedimentation tank and a filtration and adsorption device, wherein thewater pump is connected with a water inlet and used for pumping sewage; the host device comprises a plurality of electro-flocculation modules connected sequentially and a displaying and monitoring module used for displaying a PH value, temperature, turbidity and water level information, adjusting the flow rate of the water pump and the electrolytic current of each of the electroflocculation modules and realizing multi-stage electrolysis; the sedimentation tank is connected with the host device and used for discharging the precipitated sewage after multistage filtration and adsorption. Compared with the prior art, the multistage sewage electro-flocculation treatment system provided by the invention has the advantages of multi-stage electrolytic precipitation, high efficiency, stable electrolytic current, water pump flow rate control, high efficiency and stability, applicability to heavy metals, reduced flow rate, improved purifying effect, self-cleaning, full water purification and thelike.

The invention discloses an inverse-proportion three-way flow valve. The inverse-proportion three-way flow valve comprises a valve body, a P port, a T port and an A port are formed in the valve body, avalve sleeve is assembled on the upper portion of the valve body, a proportion electromagnet is assembled on the upper portion of the valve sleeve, an armature is arranged in the proportion electromagnet, and the lower surface of the armature abuts against a push rod; the push rod penetrates through the valve sleeve to abut against a throttle valve element, the lower portion of the throttle valveelement extends into the valve body, and a throttle spring is arranged between the throttle valve element and the valve body; a throttle control hole is formed in the side wall of the throttle valveelement, when a power outage occurs on the proportion electromagnet, and the throttle control hole communicates with the A port through a through-flow cavity, a through-flow hole and a differential pressure feedback cavity which are sequentially connected in the valve body; and when the proportion electromagnet is electrified, the throttle control hole is covered by a sealing convex shoulder of the valve body step by step, when a maximum voltage is given, the sealing convex shoulder can completely cover the throttle control hole. The inverse-proportion three-way flow valve has the advantages that the structure is reasonable and compact, the size is small, and control is sensitive.

The invention belongs to the technical field of the industrial gas supercharging and realizes a remote controllable large-flow intelligent gas supercharging device. The content of the invention mainly relates to a supercharging technology in which the quantity of opened supercharging valves is controlled automatically and remotely on-line according to the required high-pressure gas flow to generate high-pressure gas to be matched with supply / demand flow. The high-pressure gas which is generated by multiple sets of supercharging valves in parallel connection is inputted into a gas tank; when the pressure of the gas in the gas tank exceeds a preset upper limit of pressure, a part of supercharging valves are closed under the control of the controller; when the pressure of the gas in the gas tank is lower than a preset lower limit of pressure, a part of supercharging valves are opened under the control of the controller so as to increase the high-pressure gas output; the supercharging valves of the supercharging device are in parallel connection and the quantity of the supercharging valves can be freely increased; the controller is used for recording the action times of each of the supercharging valves and preferably controlling the supercharging valves with few action times to act; the supercharging valves are designed and arranged according to dynamic balance; and a shock-reducing cushion is mounted at the lower end of a supercharging valve base, so that the vibration and noise caused by the motion of a piston are reduced.

The invention relates to a gas compression method adopting end face compression and an end face compression electric air source device, wherein the method comprises the following steps: both end faces of an impeller are provided with ring grooves; the inside of each ring groove is provided with vanes which evenly divide the ring groove into a plurality of compression units; the impeller is arranged inside a closed cavity which is matched with the impeller; both inside walls of the closed cavity are provided with air inlet ducts, air outlet ducts and cambered gas guiding grooves corresponding to the positions of the ring grooves arranged on the impeller; one end of each cambered gas guiding groove is communicated with each air inlet duct, while the other end is communicated with each air outlet duct; the impeller is driven to rotate at high speed through a motor, thereby ensuring that gas is fed into the cambered gas guiding grooves from the air inlet ducts; multistage compression of the gas positioned at both end faces of the impeller is completed by means of the compression units arranged on the impeller; finally, gas is discharged from the air outlet ducts. The device comprises a drive motor, a first end cap, a second end cap, an outer ring and an impeller, wherein both end faces of the impeller are provided with ring grooves which are provided with a plurality of compression units inside. The method can provide stable air flow with high pressure ratio and mass flow; meanwhile, the device has the advantage of convenient carrying.

The invention discloses an integrated type high-flow piezoelectric pump. The integrated type high-flow piezoelectric pump is formed by four layers of pump bodies in a pressing way, wherein the pump body in each layer comprises two piezoelectric micro-pumps which are connected in parallel, a public inlet and a public outlet; a pump body I, a pump body II and a pump body III are completely same in structure; the public inlet and the public outlet of a pump body IV do not completely penetrate through the pump body IV; other structures of the pump body IV are same as the pump body I; a valve plate, a parabola pump cavity, a piezoelectric vibrator and the like are arranged at the top part of the pump body I, an inlet flow passage and an outlet flow passage are formed in the bottom part of the pump body I; the piezoelectric vibrator is fixedly arranged on the pump body I in a simple-support way; the bottom part of the pump body I is connected with the bottom part of the pump body II in the pressing way, the top part of the pump body II is connected with the top part of the pump body III in the pressing way, and the bottom part of the pump body III is connected with the bottom part of the pump body IV, so that the whole integrated type high-flow piezoelectric pump is further formed. The integrated type high-flow piezoelectric pump has the advantages of high integration, small volume and large output flow.

The invention relates to an inflator for an air-bag, which comprises at least one pressure vessel (2) containing pressurised gas, mounted on a housing which receives gas from said vessel (2) and direct it to the air-bag to be inflated, via an aperture (21 ) formed in a wall (210) of said vessel (2), this aperture (21 ) being normally closed by a foil (22) fixed on the wall (210), at the outside of the vessel (2), which breaks when a predetermined pressure is reached in said housing, characterized in that said vessel (2) contains means (5) for increasing the output flow of pressurized gas through said aperture (21 ) while the delta pressure between the inside of said vessel (2) and said housing decreases.

The invention discloses an energy-saving vanadium cell capable of improving cell stability. The energy-saving vanadium cell comprises a positive pole half cell, a negative pole half cell and a cell stack, wherein the positive pole half cell and the negative pole half cell are connected with the cell stack respectively; the positive pole half cell comprises a positive pole liquid storage tank, a first air outlet pipe, a first delivery pipe, a second delivery pipe, a positive pole pump, a third delivery pipe and a fourth delivery pipe; and the negative pole half cell comprises a negative pole liquid storage tank, a third air outlet pipe, a fifth delivery pipe, a sixth delivery pipe, a negative pole pump, a seventh delivery pipe and an eighth delivery pipe. Through the switching control of avalve, the delivery of an electrolyte under the effect of gravity can be realized, the delivery flow of the electrolyte can be improved by using gas thrust, the output of the pump is reduced, an energy-saving effect is reached, and the air outlet pipes enable gas to be in a safe state all the time inside the liquid storage tanks. Gas inside the liquid storage tanks is used for isolating the electrolyte and external gas, divalent vanadium ions inside the electrolyte are unlikely to oxidize, the stability of the electrolyte is facilitated, the performance of the vanadium cell is improved, and the charge and discharge efficiency of the vanadium cell is improved.

The invention belongs to the technical field of heat dissipation and cooling and particularly relates to a CUP water cooling system circulation pump. A pump cover is arranged on a pump body, and inletvalves and outlet valves are arranged on the pump cover and the pump body. The inlet valves and the outlet valves are butterfly valves. Transducers are connected in a pump body cavity through pump cover body tables and sealing rings, and each transducer is composed of an elastic ring and piezoelectric vibrators stuck to the two sides of the elastic ring. Each piezoelectric vibrator is formed by connecting a base plate and piezoelectric pieces in a sticking manner. Upper pump cavities are formed by the transducers and the pump cover, and lower pump cavities are formed by the sealing rings andthe pump body. The upper pump cavities which are connected in parallel are then in parallel connection with the lower pump cavities which are connected in parallel. At least one piezoelectric vibratorcomprises a driver and a sensor. A power source outputs the same direct-current drive voltage signal to all the piezoelectric vibrators and the drivers, a sensing voltage signal generated by the sensor is used for judging the deformation state of the piezoelectric vibrators, when the sensing voltage reaches the extreme value, the power source drives the voltage and the piezoelectric vibrators tochange deformation directions, and therefore reciprocating bending vibration of the piezoelectric vibrators and one-direction flowing of fluids are achieved.

The invention discloses a conical elastic valve piezoelectric pump. The conical elastic valve piezoelectric pump comprises a middle pump body, a lower pump body, an upper cover, a single crystal waferpiezoelectric piece, sealing rings, conical valves, springs, bolts and nuts, wherein a lower pump body inlet and a lower pump body outlet are formed in the lower pump body; the lower pump body inletis matched with a liquid inlet formed in the middle pump body; the lower pump body outlet is matched with a liquid outlet formed in the middle pump body; the springs and the conical valves are assembled and are mounted in a matched part between the liquid inlet of the middle pump body and the lower pump body inlet; the conical valves and the springs are reversely mounted in a matched part betweenthe lower pump body outlet and the liquid outlet of the middle pump body; circular rubber rings are mounted between the middle pump body and the lower pump body; the bolts and the nuts are matched soas to fix the single crystal wafer piezoelectric piece between the upper cover and the middle pump body; then the upper cover, the middle pump body and the lower pump body are assembled to complete assembling of the piezoelectric pump. The conical elastic valve piezoelectric pump has high output flow and has a broad application prospect in the drug delivery field.