阅读说明：本技术 一种无阀立体式压电泵 (Valveless three-dimensional piezoelectric pump ) 是由 陈劲松 陈晓平 胡嘉诚 吴潇 陈啟源 李军军 于 2021-06-28 设计创作，主要内容包括：本发明涉及压电泵的技术领域,具体公开了一种无阀立体式压电泵,解决了现有技术中压电泵传输效率低下、成本高的问题,本无阀立体式压电泵包括：泵体、底座以及多个压电片,在泵体侧边设置多个压电片和定位槽槽底合围形成的流道,第一单向气流口由于与定位槽相接端的直径大于与第一容腔相接端的直径,其第二单向气流口由于与定位槽相接端的直径小于与第二容腔相接端的直径,方便进气孔的气流从第二单向气流口进入到流道中,当压电片复位时,由于其接触面积的大小,气体会从第二单向气流口流出,进而保证了气体的单向流向,同时减少了采用单向阀带来的成本问题,且在泵体的四侧均设有该通道,可以极大的提高泵体的传输效率。(The invention relates to the technical field of piezoelectric pumps, in particular to a valveless three-dimensional piezoelectric pump, which solves the problems of low transmission efficiency and high cost of the piezoelectric pump in the prior art, and comprises the following components: the pump body, the base and a plurality of piezoelectric patches, set up the runner that a plurality of piezoelectric patches and constant head tank bottom surround and form at the pump body side, the diameter that first one-way airflow mouth connects with the constant head tank is greater than the diameter that connects with the first appearance chamber, the diameter that its second one-way airflow mouth connects with the constant head tank is less than the diameter that connects with the second appearance chamber, make things convenient for the air current of inlet port to enter into the runner from second one-way airflow mouth, when the piezoelectric patch resets, because its size of area of contact, the gas can flow from second one-way airflow mouth, and then guaranteed the one-way flow direction of gas, reduced the cost problem that adopts the check valve to bring simultaneously, and all be equipped with this passageway in four sides of the pump body, the transmission efficiency of the pump body that can very big improvement.)

1. A valveless stereo piezoelectric pump, comprising:

the pump body is internally provided with a first containing cavity and a second containing cavity, and an air outlet communicated with the first containing cavity is formed in the upper side of the pump body; a plurality of positioning grooves are formed in the side face of the pump body, and a first one-way airflow port communicated with the first cavity and a second one-way airflow port communicated with the second cavity are formed in the bottom of each positioning groove;

the base is arranged below the pump body, a plurality of air inlet holes communicated with the second cavity are formed in the base, the whole air inlet holes are conical, and the diameter of one end, close to the second cavity, of each air inlet hole is smaller than that of one end, far away from the second cavity, of each air inlet hole;

the piezoelectric pieces are respectively arranged in the positioning grooves, a gap is arranged between the end face of each piezoelectric piece and the bottom of each positioning groove, and the side edges of the piezoelectric pieces are connected with the side faces of the positioning grooves.

2. The valveless stereo piezoelectric pump according to claim 1, wherein the first one-way airflow port comprises a first flow guide port and a first flow guide port, the first flow guide port is disposed between the first flow guide port and the positioning groove, a diameter of an end of the first flow guide port connected with the positioning groove is larger than a diameter of an end of the first flow guide port connected with the first flow guide port, the first flow guide port communicates the first flow guide port with the first receiving cavity, and a first flow guide portion inclined toward the air outlet is disposed in the first flow guide port.

3. The valveless stereo piezoelectric pump according to claim 2, wherein the second one-way airflow port comprises a second drainage port and a second diversion port, the second drainage port is disposed between the second receiving chamber and the second diversion port, a diameter of an end of the second drainage port connected to the second receiving chamber is larger than a diameter of an end of the second drainage port connected to the second diversion port, the second diversion port communicates the second drainage port with the positioning groove, and a second diversion portion is disposed in the second diversion port and inclines toward one side of the first one-way airflow port.

4. A valveless piezoelectric stereo pump according to claim 3, wherein the number of the first one-way flow port and the number of the second one-way flow port are two.

5. The valveless piezoelectric three-dimensional pump according to claim 1, wherein the number of the positioning grooves is four, four positioning grooves are respectively disposed on four sides of the pump body, the number of the piezoelectric sheets is four, four piezoelectric sheets are respectively disposed in four positioning grooves, and a sealing ring is disposed on a side of each piezoelectric sheet and connected to a side of each positioning groove.

6. A valveless stereo piezoelectric pump according to claim 5, wherein the pump body is provided with four end caps, the four end caps are respectively located at the four positioning grooves, and the end caps are used for closing or opening the positioning grooves.

7. The valveless stereo piezoelectric pump according to claim 6, wherein a mounting groove is formed in the positioning groove, mounting holes are formed in two opposite sides of the mounting groove, the end cap is movably clamped in the mounting groove, a mounting portion is formed at one end of the end cap, rotating shafts are arranged on two sides of the mounting portion, the mounting portion is movably arranged in the mounting groove, the rotating shafts are rotatably arranged in the mounting holes, and a gap is formed between the piezoelectric sheet and the end cap.

8. The valveless stereo piezoelectric pump according to claim 1, wherein an outer cover is disposed outside the base, the outer cover has a plurality of air holes, the air holes are disposed in a staggered manner with respect to the air inlet holes, and a gap is disposed between the outer cover and the base.

9. A valveless stereo piezoelectric pump according to claim 8, wherein four support columns are provided at the bottom of the housing, and the four support columns are provided at the bottom of the housing in a pairwise symmetry.

Technical Field

The invention relates to the technical field of piezoelectric pumps, in particular to a valveless three-dimensional piezoelectric pump.

Background

The invention relates to a pump structure, in particular to a novel piezoelectric pump, which belongs to the technical field of fluid machinery. Generally, the piezoelectric vibrator is used for providing driving force for fluid through reciprocating vibration, and the flow direction of the fluid is controlled through a one-way valve. Compared with the traditional mechanical pump, the piezoelectric pump has the advantages of simple structure, small volume, low cost, low processing difficulty and the like. Wherein the fluid comprises a gas.

However, in the conventional piezoelectric pump, only a single channel is generally provided in the pump body for gas transmission, the transmission efficiency is low, and at least two check valves are required in each channel to control the flow direction of the gas, so that the manufacturing cost of the piezoelectric pump in the prior art is high.

Disclosure of Invention

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a valveless stereo piezoelectric pump, including:

the pump body is internally provided with a first containing cavity and a second containing cavity, and an air outlet communicated with the first containing cavity is formed in the upper side of the pump body; a plurality of positioning grooves are formed in the side face of the pump body, and a first one-way airflow port communicated with the first cavity and a second one-way airflow port communicated with the second cavity are formed in the bottom of each positioning groove;

the base is arranged below the pump body, a plurality of air inlet holes communicated with the second cavity are formed in the base, the whole air inlet holes are conical, and the diameter of one end, close to the second cavity, of each air inlet hole is smaller than that of one end, far away from the second cavity, of each air inlet hole;

the piezoelectric pieces are respectively arranged in the positioning grooves, a gap is arranged between the end face of each piezoelectric piece and the bottom of each positioning groove, and the side edges of the piezoelectric pieces are connected with the side faces of the positioning grooves.

According to the valveless three-dimensional piezoelectric pump, the first one-way airflow port comprises a first drainage port and a first flow guide port, the first drainage port is arranged between the first flow guide port and the positioning groove, the diameter of the end, connected with the positioning groove, of the first drainage port is larger than that of the end, connected with the first flow guide port, of the first drainage port, the first flow guide port is communicated with the first accommodating cavity, and a first flow guide part inclined towards the air outlet is arranged in the first flow guide port.

According to the valveless three-dimensional piezoelectric pump, the second one-way airflow port comprises a second drainage port and a second flow guide port, the second drainage port is arranged between the second accommodating cavity and the second flow guide port, the diameter of the end, connected with the second accommodating cavity, of the second drainage port is larger than that of the end, connected with the second flow guide port, of the second drainage port, the second flow guide port is communicated with the second drainage port and the positioning groove, and a second flow guide part which inclines towards one side of the first one-way airflow port is arranged in the second flow guide port.

According to the valveless three-dimensional piezoelectric pump, the number of the first one-way airflow openings and the number of the second one-way airflow openings are two.

According to the valveless three-dimensional piezoelectric pump, the number of the positioning grooves is four, the four positioning grooves are respectively arranged on four sides of the pump body, the number of the piezoelectric sheets is four, the four piezoelectric sheets are respectively arranged in the four positioning grooves, and the side edges of the piezoelectric sheets are provided with the sealing rings and connected with the side edges of the positioning grooves.

According to the valveless three-dimensional piezoelectric pump, the pump body is provided with four end covers which are respectively positioned at the four positioning grooves, and the end covers are used for closing or opening the positioning grooves.

According to last valveless three-dimensional piezoelectric pump, be equipped with the mounting groove in the constant head tank, the both sides that the mounting groove is relative are equipped with the mounting hole, the end cover activity card is established in the mounting groove, just end cover one end is equipped with the installation department, be equipped with the pivot on the installation department both sides, the installation department activity sets up in the mounting groove, the rotatable setting of pivot is in the mounting hole, the piezoelectric patches with be equipped with the clearance between the end cover.

According to the valveless three-dimensional piezoelectric pump, the outer side of the base is provided with the outer cover, the outer cover is provided with a plurality of air holes, the air holes and the air inlet holes are distributed in a staggered mode, and a gap is formed between the outer cover and the base.

According to the valveless three-dimensional piezoelectric pump, the bottom of the outer cover is provided with four support columns, and the four support columns are arranged at the bottom of the outer cover in pairwise symmetry.

The invention has the following beneficial effects: the four sides of the pump body are provided with positioning grooves, each positioning groove is provided with a piezoelectric plate, a first one-way airflow port, a second one-way airflow port, the piezoelectric plate and the bottom of the positioning groove which are arranged at the bottom of the positioning groove form a flow channel through which gas can pass, when the piezoelectric plates work, the gap between the piezoelectric plates and the bottom of the positioning groove is increased, the pressure in the flow channel is reduced, so that the internal and external pressure difference can be caused, the gas can enter the gap through an air inlet hole and the second one-way airflow port, because the air inlet hole and the second one-way airflow port are both provided with structures similar to a conical hole, the gas can enter the gap simply, the pressure required by reverse discharge is larger, when the piezoelectric plates are restored, the gas can be discharged from the first one-way airflow port which is convenient to discharge, and is discharged through the first cavity and the air outlet, the valveless operation in the pump body can be realized, and the cost can be saved, and each positioning groove is provided with the same flow channel, so that the four flow channels work synchronously, and the gas transmission efficiency can be greatly improved.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a cross-sectional view of the overall construction of the present invention;

FIG. 3 is a schematic view of the assembly of the pump body and base of the present invention;

in the figure: 100. a pump body; 110. a first cavity; 120. a second cavity; 130. an air outlet; 140. positioning a groove; 141. mounting grooves; 141a, mounting holes; 150. a first one-way airflow port; 151. a first drainage port; 152. a first flow guide port; 152a, a first flow guide part; 160. a second one-way airflow port; 161. a second drainage opening; 162. a second flow guide port; 162a, a second flow guide part; 170. an end cap; 171. an installation part; 200. a base; 210. an air inlet; 220. a housing; 221. air holes are formed; 222. a support pillar; 300. a piezoelectric sheet; 310. and (5) sealing rings.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 3, a valveless piezoelectric three-dimensional pump includes:

the pump body 100 is provided with a first cavity 110 and a second cavity 120 in the pump body 100, and an air outlet 130 communicated with the first cavity 110 is arranged on the upper side of the pump body 100; the side surface of the pump body 100 is provided with a plurality of positioning slots 140, a first one-way airflow port 150 communicating with the first cavity 110 and a second one-way airflow port 160 communicating with the second cavity 120 are arranged at the bottom of the positioning slot 140, a cavity is arranged in the pump body 100 and is divided into the first cavity 110 and the second cavity 120 by a partition plate, the first cavity 110 and the second cavity 120 can be communicated through the first one-way airflow port 150, the positioning slot 140 and the second one-way airflow port 160, wherein the first one-way airflow port 150 can transmit gas from the positioning slot 140 to the first cavity 110, the second one-way airflow port 160 can transmit gas from the second cavity 120 to the positioning slot 140, and both the gas is transmitted in one direction, and the one-way movement of the gas is realized through the first one-way airflow port 150 and the second one-way airflow port 160.

The base 200 and the base 200 are disposed below the pump body 100, and the base 200 is provided with a plurality of air inlets 210 communicating with the second cavity 120, the air inlets 210 are integrally conical, and the diameter of the end of the air inlet 210 close to the second cavity 120 is smaller than the diameter of the end of the air inlet 210 far away from the second cavity 120, so that the air flow is large during air inlet, the pressure required by the reverse movement of the air is large, and the reverse movement is not easy to be performed.

A plurality of piezoelectric sheets 300, the plurality of piezoelectric sheets 300 are respectively arranged in the plurality of positioning slots 140, a gap is arranged between the end surface of each piezoelectric sheet 300 and the bottom of each positioning slot 140, the side edge of each piezoelectric sheet 300 is connected with the side surface of each positioning slot 140, the piezoelectric sheets 300 and the bottoms of the positioning slots 140 surround to form a flow channel for gas to pass through, the flow channel increases as the piezoelectric sheets 300 start to work, pressure difference between the pressure inside and outside the flow channel is caused, gas is sucked in through the gas inlet, the gas enters the flow channel through the second cavity 120 and the second one-way gas flow port 160 in sequence, when the piezoelectric sheets 300 are restored, the gas is discharged through the first one-way gas flow port 150, the first cavity 110 and the gas outlet 130 in sequence, the cost of adopting the one-way valve can be saved through the first one-way gas flow port 150 and the second one-way gas flow port 160, and the positioning slots 140 and the piezoelectric sheets 300 are arranged in plurality, a plurality of flow passages are formed between the first receiving chamber 110 and the second receiving chamber 120, so that the gas transmission efficiency can be greatly improved.

The first one-way airflow port 150 includes a first flow guide port 151 and a first flow guide port 152, the first flow guide port 151 is disposed between the first flow guide port 152 and the positioning groove 140, a diameter of a connection end of the first flow guide port 151 and the positioning groove 140 is larger than a diameter of a connection end of the first flow guide port 151 and the first flow guide port 152, the first flow guide port 152 communicates the first flow guide port 151 with the first cavity 110, and a first flow guide portion 152a inclined toward the air outlet 130 is disposed in the first flow guide port 152. The second one-way airflow port 160 includes a second flow guide port 161 and a second flow guide port 162, the second flow guide port 161 is disposed between the second cavity 120 and the second flow guide port 162, a diameter of a connection end of the second flow guide port 161 and the second cavity 120 is larger than a diameter of a connection end of the second flow guide port 161 and the second flow guide port 162, the second flow guide port 162 communicates the second flow guide port 161 with the positioning groove 140, and a second flow guide portion 162a inclined toward one side of the first one-way airflow port 150 is disposed in the second flow guide port 162.

Wherein, when the piezoelectric sheet 300 is working, even if the first one-way airflow port 150 and the second one-way airflow port 160 inhale air simultaneously, because the air inlet end of the second one-way airflow port 160 is larger than the connection end with the positioning groove 140, and the air inlet end of the first one-way airflow port 150 is smaller than the connection end with the positioning groove 140, the air inlet of the second one-way airflow port 160 is larger than the air inlet of the first one-way airflow port 150, and because the air is influenced by the second diversion part 162a when passing through the second one-way airflow port 160, the air moves in the flow passage in the direction of the first one-way airflow port 150, because the air movement has a certain speed, when it is filled in the flow passage above the second one-way airflow port 160, the air inhaling of the second one-way airflow port 160 can be avoided, when the piezoelectric sheet 300 is reset, because the contact area of the first one-way airflow port 150 with the positioning groove 140 is large, and the contact area of the second one-way airflow port 160 with the positioning groove 140 is small, the gas is discharged from the first unidirectional gas flow port 150 to perform its unidirectional movement.

The first one-way air flow port 150 and the second one-way air flow port 160 are provided in two, and the intake and discharge efficiency of the air can be improved.

The number of the positioning grooves 140 is four, the four positioning grooves 140 are respectively arranged on four sides of the pump body 100, the number of the piezoelectric patches 300 is four, the four piezoelectric patches 300 are respectively arranged in the four positioning grooves 140, and the side edges of the piezoelectric patches 300 are provided with the sealing rings 310 to be connected with the side edges of the positioning grooves 140.

The pump body 100 is provided with four end covers 170, the four end covers 170 are respectively located at the four positioning grooves 140, the end covers 170 are used for closing or opening the positioning grooves 140, the end covers 170 close the positioning grooves 140 to protect the piezoelectric patches 300 in the positioning grooves 140 from being damaged, and when the piezoelectric patches 300 need to be replaced or maintained, the end covers 170 can be used for opening the positioning grooves 140, so that the piezoelectric patches 300 can be replaced or maintained rapidly.

Be equipped with mounting groove 141 in the constant head tank 140, the both sides that mounting groove 141 is relative are equipped with mounting hole 141a, the movable card of end cover 170 is established in mounting groove 141, and end cover 170 one end is equipped with installation department 171, be equipped with the pivot on the installation department 171 both sides, the activity of installation department 171 sets up in mounting groove 141, the rotatable setting of pivot is in mounting hole 141a, be equipped with the clearance between piezoelectric patches 300 and the end cover 170, in this embodiment, end cover 170 adopts the pivoted form to open or close this constant head tank 140, of course can also adopt detachable or slidingtype connected mode installation end cover 170, should not surpass the protection scope of this application.

The outer cover 220 is arranged on the outer side of the base 200, the outer cover 220 is provided with a plurality of air holes 221, the air holes 221 and the air inlet holes 210 are distributed in a staggered mode, gaps are formed between the outer cover 220 and the base 200, the outer cover 220 is used for protecting the base 200 and supporting the base 200, the air holes 221 are communicated with the air inlet holes 210 and the shell, the gaps between the air holes 210 and the shell are used for transmitting air, and the air inlet holes 210 can be prevented from being blocked by small solids due to the staggered distribution of the air holes.

Four support columns 222 are arranged at the bottom of the outer cover 220, the four support columns 222 are symmetrically arranged at the bottom of the outer cover 220 in pairs, and the support columns 222 are used for providing a supporting effect for the outer cover 220, the base 200 and the pump body 100 so that the air inlet holes 210 are separated from the bottom surface.

The invention provides a valveless three-dimensional piezoelectric pump, a flow channel formed by encircling a plurality of piezoelectric sheets and a positioning groove bottom is arranged on the side edge of a pump body, a first containing cavity and a second containing cavity are communicated through a first one-way airflow port and a second one-way airflow port, so that the piezoelectric sheets can control gas to be sucked or discharged, the diameter of the first one-way airflow port connected with the positioning groove is larger than that of the first containing cavity, the diameter of the second one-way airflow port connected with the positioning groove is smaller than that of the second containing cavity, so that the airflow of an air inlet can conveniently enter the flow channel from the second one-way airflow port, when the piezoelectric sheets are reset, the gas can flow out from the second one-way airflow port due to the size of the contact area, the one-way flow direction of the gas is ensured, meanwhile, the cost problem caused by adopting a one-way valve is reduced, and the channels are arranged on the four sides of the pump body, the transmission efficiency of the pump body can be greatly improved.

The technical solutions of the present invention are explained in detail above with reference to the accompanying drawings, and the described embodiments are used to help understanding the idea of the present invention. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

Moreover, descriptions of the present invention as relating to "first," "second," "a," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating a number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.