阅读说明：本技术 一种压电驱动式共振气泵 (Piezoelectric driving type resonance air pump ) 是由 田晓超 李庆华 赵昌龙 贺春山 于淼 候跃谦 赵剑 李志瑶 杨凤双 于 2020-06-17 设计创作，主要内容包括：本发明公开了一种压电驱动式共振气泵,包括腔体、下腔体和底座,底座的顶端固定连接定位环,定位环的顶端设有压电振子,所述压电振子通过若干紧固螺栓安装在定位环上,所述底座的顶端均匀的设有若干立柱,所有的所述立柱的顶端共同设有下腔体,所述下腔体通过螺柱安装在立柱上,下腔体的顶端设有卡槽,所述卡槽内安装有腔体；所述共振杆的底端贯穿压电振子并套设有螺帽,共振杆上套设有质量机构；本发明通过设置质量机构改变其共振频率,可以实现在400HZ以下的低频工作,也可以在400HZ以上的高频工作条件下工作,并且整个装置的整体结构简单,体积小,完全不产生磁干扰也不接受磁干扰,比传统的气泵更适合于在复杂环境工作。(The invention discloses a piezoelectric driving type resonance air pump which comprises a cavity, a lower cavity and a base, wherein the top end of the base is fixedly connected with a positioning ring, the top end of the positioning ring is provided with a piezoelectric vibrator, the piezoelectric vibrator is arranged on the positioning ring through a plurality of fastening bolts, the top end of the base is uniformly provided with a plurality of stand columns, the top ends of all the stand columns are provided with the lower cavity together, the lower cavity is arranged on the stand columns through studs, the top end of the lower cavity is provided with a clamping groove, and the cavity is arranged in the clamping groove; the bottom end of the resonance rod penetrates through the piezoelectric vibrator and is sleeved with a nut, and a mass mechanism is sleeved on the resonance rod; the invention changes the resonance frequency by arranging the mass mechanism, can realize low-frequency work below 400HZ and work under the high-frequency working condition above 400HZ, has simple integral structure and small volume, does not generate magnetic interference at all and does not accept the magnetic interference, and is more suitable for working in complex environment than the traditional air pump.)

1. The piezoelectric driving type resonance air pump comprises a cavity (1), a lower cavity (2) and a base (5), and is characterized in that the base (5) is of a cylindrical structure, a positioning ring (6) is fixedly connected to the top end of the base (5), the positioning ring (6) is of a circular ring-shaped structure, a piezoelectric vibrator (8) is arranged on the top end of the positioning ring (6), the piezoelectric vibrator (8) is installed on the positioning ring (6) through a plurality of fastening bolts, a plurality of stand columns (11) are uniformly arranged on the top end of the base (5), the stand columns (11) are of a circular tube-shaped structure, all the top ends of the stand columns (11) are jointly provided with the lower cavity (2), the lower cavity (2) is installed on the stand columns (11) through studs (12), the top end of the lower cavity (2) is provided with a clamping groove, the cavity (1) is installed in the clamping groove, and the cavity, the upper cavity (101) is of a disc cylinder structure with an open bottom end, the upper cavity (101) is installed on a clamping groove through a sealing ring (104), the upper cavity (101) is installed on the lower cavity (2) through a plurality of bolts (108), the bottom end of the sealing ring (104) is fixedly connected with a metal sheet (105) matched with the clamping groove, a partition plate (111) is arranged in an inner cavity of the upper cavity (101), the partition plate (111) divides the inner cavity of the upper cavity (101) into two air cavities (110), the outer side end of each air cavity (110) is communicated with an air hole (109), a sheet (103) matched with the partition plate (111) is arranged at the bottom of the inner cavity of the upper cavity (101), through holes matched with the air cavities (110) are formed in the sheet (103), one-way valves (102) are installed on the through holes, and a joint (107) matched with the lower cavity (2) is fixedly connected to the middle, connect (107) and connect resonance pole (10) through lock hoop (3), the bottom of resonance pole (10) is run through piezoelectric vibrator (8) and is equipped with nut (9) with the cover, and the cover is equipped with quality mechanism (4) on resonance pole (10).

2. A piezo-electrically driven resonant air pump according to claim 1, characterized in that the lower chamber (2) is of circular ring plate structure, the axis of the lower chamber (2) coinciding with the axis of the positioning ring (6).

3. A piezo-electrically driven resonant air pump according to claim 1, characterized in that the foil (105) is made of a resilient metal.

4. A piezo-electrically driven resonant air pump according to claim 1, characterized in that the thin sheet (103) is made of an elastic material.

5. A piezo-driven resonance air pump according to claim 1, characterized in that the fastening bolt is sleeved with a bolt washer (7) that fits the piezo-vibrator (8).

6. The piezoelectrically driven resonant air pump according to any one of claims 1 to 5, wherein the mass mechanism (4) comprises a mass block (404), the mass block (404) is sleeved on the outer side of the resonant rod (10), a first nut washer (402) matched with the mass block (404) is sleeved on the outer side of the resonant rod (10), a plurality of spring pieces (401) are arranged on the top end of the mass block (404) in a circular array, one end of each spring piece (401) is sleeved on the corresponding stud (12), and the other end of each spring piece (401) is mounted on the corresponding mass block (404) through a mounting bolt.

7. A piezo-driven resonant air pump according to claim 6, characterized in that the mounting bolt is sleeved with a second nut washer (403) that cooperates with the spring plate (401).

8. A piezo-electrically driven resonant air pump according to claim 6, characterized in that all the spring strips (401) are distributed in a spiral configuration.

Technical Field

The invention relates to the technical field of air diaphragm pumps, in particular to a piezoelectric driving type resonance air pump.

Background

The air diaphragm pump is a new type of conveying machinery, adopts compressed air as power source, and can pump out and suck up various corrosive liquids, liquids with particles, high viscosity, easy volatilization, flammability and strong toxicity.

Two elastic diaphragms are respectively arranged in two symmetrical working cavities of the pump to form two independent cavities, the two diaphragms are integrated by the middle shaft, the pressurization of each cavity is controlled by the air distribution valve, and after compressed air enters the air distribution valve, one diaphragm is pushed to drive the two diaphragms connected by the connecting rod to move synchronously. At the same time, the gas in the other working chamber is discharged out of the pump, and when the stroke end is reached, the gas distribution valve automatically switches the compressed air to the other working chamber to push the diaphragms to move in opposite directions, so that the synchronous reciprocating motion of the two diaphragms is formed. Two one-way ball valves are arranged in each working chamber, and the reciprocating motion of the diaphragm causes the change of the volume in the working chamber, so that the two one-way ball valves are forced to be alternately opened and closed, and liquid is continuously sucked and discharged.

At present, the gas diaphragm pump mainly comprises an electromagnetic diaphragm pump and a piezoelectric diaphragm pump which are driven by a motor cam mechanism, wherein the piezoelectric pump has good output effect on pure water working media. The diaphragm type piezoelectric vibrator has limited deformability, has poor gas output effect, and greatly reduces the working effect of the whole pump body at higher frequency. Therefore, the piezoelectric vibrator air pump is a device for amplifying the vibration displacement of a piezoelectric excitation source by using the system resonance principle and using the vibration displacement for driving fluid, and a piezoelectric vibrator (PZT, PLZT or PMN) can be used as a driving force source of the air pump, so that the piezoelectric air pump which can provide enough power and can work at higher frequency is constructed.

Disclosure of Invention

The present invention is directed to a piezoelectric driven resonant air pump to solve the above problems.

In order to achieve the purpose, the invention provides the following technical scheme:

a piezoelectric driving type resonance air pump comprises a cavity, a lower cavity and a base, wherein the base is of a cylindrical structure, the top end of the base is fixedly connected with a positioning ring, the positioning ring is of a circular ring structure, a piezoelectric vibrator is arranged at the top end of the positioning ring and is arranged on the positioning ring through a plurality of fastening bolts, a plurality of stand columns are uniformly arranged at the top end of the base and are of circular tube-shaped structures, the top ends of all the stand columns are jointly provided with the lower cavity, the lower cavity is arranged on the stand columns through a stud, the lower cavity is of a circular ring plate structure, the axis of the lower cavity is coincided with the axis of the positioning ring, the top end of the lower cavity is provided with a clamping groove, a cavity is arranged in the clamping groove and comprises an upper cavity, the upper cavity is of a circular cylinder structure with an open bottom end, the upper cavity is arranged, the bottom end of the sealing ring is fixedly connected with a metal sheet matched with the clamping groove, the metal sheet is made of elastic metal, a partition board is arranged in an inner cavity of the upper cavity and divides the inner cavity of the upper cavity into two air cavities, the outer side end of each air cavity is communicated with an air hole, a sheet matched with the partition board is arranged at the bottom of the inner cavity of the upper cavity, the sheet is made of elastic material, a through hole matched with the air cavity is formed in the sheet, a one-way valve is installed on the through hole, a connector matched with the lower cavity is fixedly connected to the middle of the bottom end of the metal sheet, the connector is connected with a resonance rod through a tightening hoop, a piezoelectric vibrator is penetrated through the bottom end of the resonance rod and is sleeved with a nut, a quality mechanism is sleeved on the resonance rod, vibration is generated through the piezoelectric vibrator, and the resonance rod, the vibration is transmitted to the metal sheet by using the joint, the metal sheet is driven to be blown up and down by using the up-and-down vibration of the joint, so that the internal volume of the upper cavity is changed, and external gas enters or is discharged from the inner cavity of the upper cavity through the gas hole (due to the arrangement of the one-way valve, the air can be limited to enter the upper cavity from one gas hole and be discharged from the other gas hole), thereby completing the work of the air pump; meanwhile, the resonance frequency of the air pump is changed by arranging the mass mechanism, so that the air pump can work at a low frequency below 400HZ and also can work under a high-frequency working condition above 400HZ, and the whole air pump is simple in integral structure, small in size, free of magnetic interference and accepting magnetic interference, more suitable for working in a complex environment than a traditional air pump, not easy to damage and easier to maintain; meanwhile, the positioning ring is matched with the fastening bolt to limit the radial vibration of the piezoelectric vibrator, so that the upward transmission of the vibration of the piezoelectric vibrator is facilitated, and the smooth operation of the whole device is ensured.

In a further embodiment, the fastening bolt is sleeved with a bolt washer matched with the piezoelectric vibrator, and the bolt washer is arranged, so that the piezoelectric vibrator can be prevented from being damaged during installation of the fastening bolt to the maximum extent, damage caused by later maintenance and disassembly is reduced, and the service life of the piezoelectric vibrator is prolonged.

In a further embodiment, mass mechanism includes the quality piece, the outside at resonance lever is established to the quality piece cover, resonance lever's outside cover be equipped with quality piece matched with first nut packing ring, the top of quality piece is circular array and is equipped with a plurality of spring leafs, the pot head of spring leaf is equipped with on the double-screw bolt, and the other end of spring leaf passes through mounting bolt to be installed on the quality piece, the cover is equipped with spring leaf matched with second nut packing ring on the mounting bolt, all the spring leaf is vortex shape structure distribution, through setting up vortex shape spring leaf, can reduce the rigidity of whole device by a wide margin, is favorable to reducing the natural frequency of whole device, can further improve the stability of whole device work.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention changes the resonance frequency by arranging the mass mechanism, can realize low-frequency work below 400HZ and work under the high-frequency working condition above 400HZ, has simple integral structure and small volume, does not generate magnetic interference at all and does not accept the magnetic interference, is more suitable for working in complex environment than the traditional air pump, is not easy to damage and is easier to maintain; meanwhile, the positioning ring is matched with the fastening bolt to limit the radial vibration of the piezoelectric vibrator, so that the vibration of the piezoelectric vibrator is favorably transmitted upwards, and the smooth operation of the whole device is ensured;

2. according to the invention, the bolt washer is arranged, so that the piezoelectric vibrator can be prevented from being damaged when the fastening bolt is installed to the maximum extent, the damage caused by disassembly and assembly in the later maintenance process is reduced, and the service life of the piezoelectric vibrator can be prolonged;

3. the spiral spring piece is arranged, so that the rigidity of the whole device can be greatly reduced, the natural frequency of the whole device can be reduced, and the working stability of the whole device can be further improved.

Drawings

FIG. 1 is a schematic isometric view of a piezoelectric driven resonant air pump;

FIG. 2 is a schematic structural diagram of a piezoelectric driven resonant air pump in a perspective view;

FIG. 3 is a schematic structural diagram of a check valve of a piezoelectric driven resonant air pump;

FIG. 4 is a schematic structural diagram of a mass mechanism of a piezoelectric driven resonant air pump;

fig. 5 is a schematic structural diagram of a cavity of a piezoelectric driven resonant air pump.

In the figure: 1-cavity, 101-upper cavity, 102-check valve, 103-sheet, 104-sealing ring, 105-metal sheet, 107-joint, 108-bolt, 109-air hole, 110-air cavity, 111-partition plate, 2-lower cavity, 3-tightening ring, 4-mass mechanism, 401-spring plate, 402-first nut washer, 403-second nut washer, 404-mass block, 5-base, 6-positioning ring, 7-bolt washer, 8-piezoelectric vibrator, 9-nut, 10-resonance rod, 11-upright post and 12-stud.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.