WO2022062933A1

WO2022062933A1 - Impeller and vortex-type air pump

Info

Publication number: WO2022062933A1
Application number: PCT/CN2021/117870
Authority: WO
Inventors: 林兴辉
Original assignee: 台州瑞晶机电有限公司
Priority date: 2020-09-23
Filing date: 2021-09-11
Publication date: 2022-03-31
Also published as: CN212318344U

Abstract

An impeller (1) and a vortex-type air pump (100). The impeller comprises: an impeller body (11), the middle part of which is provided with a mounting portion for sleeving on a driving shaft (21); two annular bosses (13), which are respectively arranged on two sides of the impeller body (11) and are formed by means of surrounding the mounting portion; two arc-shaped grooves (131), which are respectively formed along edge parts of the annular bosses (13); and a plurality of blades (14), which are positioned in the arc-shaped grooves (131). The section lines of the groove bottom surfaces of the arc-shaped grooves (131) are arc-shaped, and the depth of the arc-shaped grooves (131) is gradually increased and then decreased from the direction close to the mounting portion to the direction far away from the mounting portion, such that the bearing strength of the portions of the annular bosses (13) close to one side of the mounting portion is improved. In addition, the plurality of blades (14) are located in the arc-shaped grooves (131) and are fixedly connected to the annular bosses (13) in a semi-surrounding manner, such that the contact area of the blades (14) and the annular bosses (13) can be increased.

Description

An impeller and a vortex air pump

technical field

The utility model relates to the technical field of air pumps, and discloses an impeller and a vortex air pump.

Background technique

The vortex air pump includes a drive motor and a plurality of air pump units, each air pump unit includes a pump body and an impeller located in the pump body, and the drive motor drives the impeller to rotate simultaneously to generate high-pressure gas.

There are various forms of vortex air pumps in the prior art. For example, CN202273916U discloses an impeller of a vortex air pump, which includes an integrally casted hub, a partition plate and a plurality of blades, wherein the partition plate is arranged on the hub. At the radial extension of the hub, a plurality of blades are symmetrically distributed along the dividing plate from left to right, and the blades on the left and right sides are staggered, and reinforcing ribs are provided at the connection between the hub, the dividing plate and the blades.

In the above-mentioned integrally formed impeller, the reinforcing ribs can increase the connection strength of the blades. However, when the vortex air pump operates at high speed (for example, above 10000r/min), due to the great increase of centrifugal force on the blade, the connection strength of the rib structure is still limited, and the centrifugal force caused by the high speed of the blade cannot be used, so it is still Fragile.

technical problem

The utility model is designed to solve the above problems, and the purpose is to provide an impeller with higher strength and better adaptability to high-speed operation.

technical solutions

The utility model provides an impeller, which is installed in an air pump and is used for pressurizing gas, comprising: a wheel body, a middle part of which is provided with a mounting part for being sleeved on a driving shaft; and two annular bosses, respectively arranged on The two sides of the wheel body are formed around the mounting part; two arc-shaped grooves are respectively formed along the edge of the annular boss; a plurality of blades are located in the arc-shaped groove; wherein, the cross-sectional line of the bottom surface of the arc-shaped groove is an arc shape, the depth of the arc-shaped groove gradually increases and then decreases from the direction close to the mounting portion to the direction away from the mounting portion.

In the impeller provided by the present utility model, it may also have the following feature: wherein, the edge of the wheel body is provided with an arc-shaped groove bottom surface extending from the bottom surface of the arc-shaped groove on one side through the wheel body and extending to the other side. air vent.

The impeller provided by the present invention may also have the following characteristics: wherein each blade extends from the groove bottom surface of the arc-shaped groove along the axial direction of the annular boss, and the outer side surface formed by the blade extension is opposite to the side surface of the annular boss. flush.

In the impeller provided by the present invention, it can also have the following characteristics: wherein the position where the blade is connected with the arc-shaped groove is the extension starting part, and the extension starting part located on one side of the wheel body extends adjacently on the other side between the beginnings.

The impeller provided by the present invention may also have the following features: wherein, the plurality of blades are arc-shaped, and each has a raised portion, and the raised portions on the plurality of blades located on the same side are all arranged clockwise.

The impeller provided by the present invention may also have the following feature: wherein the side surface of the blade away from the mounting portion is flush with the outer peripheral surface of the wheel body.

The impeller provided by the present invention may also have the feature that the axes of the two annular bosses coincide with the axes of the wheel body.

A vortex type air pump, comprising: a plurality of pump bodies connected in sequence, all of which have a accommodating chamber formed inside and an air inlet and an air outlet communicated with the chamber; a plurality of impellers, which correspond to the pump bodies one-to-one to form an air pump unit, a plurality of impellers are respectively arranged in the accommodating chamber; the driving part has a driving shaft, and the driving shaft runs through each pump body; wherein, the installation part of each impeller is sleeved on the driving shaft, and is driven by the driving shaft to form airflow.

The vortex-type air pump provided by the present invention may also have such a feature, further comprising: a plurality of air seats, respectively mounted on the pump body, each having an air inlet channel communicated with the air inlet port and an air inlet channel communicated with the air outlet port. The air outlet; the general air intake piece, which is installed on the air seat, has a plurality of air intake branches corresponding to the air intake channels one-to-one, and an air intake main channel connecting each air intake branch channel, which is used for parallel connection into a plurality of intake channels The air of the pump body; the general air outlet, which is installed on the air seat, has a plurality of air outlet branches corresponding to the air outlet channels one-to-one, and an air outlet main channel connecting each air outlet branch channel, which is used for parallel connection and output from multiple pump bodies. air flow.

The vortex-type air pump provided by the present invention may also have such a feature, further comprising: a plurality of air seats, respectively mounted on the pump body, each having an air inlet channel communicated with the air inlet port and an air inlet channel communicated with the air outlet port. An air outlet; a plurality of serial connection pieces are used to connect the air inlet and outlet of adjacent air seats, so as to connect the air flow outputted by the plurality of air pump units in series.

beneficial effect

According to the impeller involved in the present invention, the impeller includes a wheel body, a mounting portion arranged in the middle of the wheel body, annular bosses located on both sides of the wheel body and surrounding the mounting portion, and a plurality of blades. An arc-shaped groove is formed in the part, and the cross-sectional line of the groove bottom surface of the arc-shaped groove is in the shape of an arc. The main bearing force of the blade is mainly concentrated on the side close to the mounting part, and the position and shape of the arc grooves make the thickness of the side of the annular boss close to the mounting part greater than the thickness of the side of the annular boss away from the mounting part , such a design improves the bearing strength of the annular boss on the side close to the mounting portion. In addition, since the plurality of vanes are located in the arc-shaped groove and are fixedly connected to the annular boss in a semi-circumferential manner, the contact area between the vanes and the annular boss can be increased. Therefore, the overall strength of the impeller provided by the utility model is greatly improved, and the impeller can withstand the centrifugal force brought by the rotational speed of 10000 r/min or more.

Description of drawings

1 is a perspective view of a vortex air pump in an embodiment of the present invention;

2 is a cross-sectional view of a vortex air pump in an embodiment of the present invention;

3 is a perspective view of an impeller in an embodiment of the present invention;

Fig. 4 is the front view of the impeller in the embodiment of the present utility model;

Fig. 5 is the side view of the impeller in the embodiment of the present utility model;

6 is a cross-sectional view of an impeller in an embodiment of the present invention;

Fig. 7 is the partial enlarged view of A in Fig. 6 of the present utility model;

Fig. 8 is a partial enlarged view at B in Fig. 5 of the present utility model;

Fig. 9 is the partial enlarged view of C in Fig. 3 of the present utility model;

10 is a schematic diagram of a general air intake in an embodiment of the utility model;

Figure 11 is a schematic diagram of the total air outlet in an embodiment of the utility model; and

FIG. 12 is a schematic diagram of a serial member in a modification.

BEST MODE FOR CARRYING OUT THE INVENTION

In order to make it easy to understand the technical means, creative features, achieved goals and effects of the present invention, the present invention will be described in detail below with reference to the embodiments and the accompanying drawings.

FIG. 1 is a perspective view of a vortex air pump in an embodiment of the present invention. 2 is a cross-sectional view of the vortex air pump in the embodiment of the present invention.

As shown in FIG. 1 and FIG. 2 , the vortex air pump 100 in this embodiment includes three impellers 1 , a driving part 2 , three pump bodies 3 , three air seats 4 , a total air intake part 5 , and a total air outlet part 6 and heat sink 7 .

3 is a perspective view of an impeller in an embodiment of the present invention. 4 is a front view of the impeller in the embodiment of the present invention. Figure 5 is a side view of the impeller in the embodiment of the present invention. 6 is a cross-sectional view of the impeller in the embodiment of the present invention.

As shown in FIGS. 3 to 6 , the impeller 1 in this embodiment includes a wheel body 11 , a mounting seat 12 , an annular boss 13 and a plurality of blades 14 .

The outer shape of the wheel body 11 is in the shape of a disc.

The outer shape of the mounting seat 12 is a hollow cylinder, the axis of the mounting seat 12 coincides with the axial direction of the wheel body 11 , and the bottom surface and the top surface of the mounting seat 12 are higher than both sides of the wheel body 11 . The inner surface of the mounting seat 12 has a key groove with a rectangular cross-section, and the direction of the key groove is parallel to the axial direction of the mounting seat 12 to form the mounting portion.

As shown in FIG. 6 , the left end of the mounting seat 12 is higher than the annular boss 13 on the left side of the wheel body, and the outer peripheral surface of the left end of the mounting seat 12 has an annular groove. The right end of the mounting seat 12 is between the right side of the wheel body 11 and the right annular boss 13 . In addition, in order to improve the stability of the mounting seat 12 and the wheel body 11, a reinforcing portion is provided at the position of the wheel body 11 close to the mounting seat 12. The cross-section of the reinforcing portion is trapezoidal, the large end is connected to the mounting seat 12, and the small end is connected to the wheel. Body 11 is connected.

Fig. 7 is a partial enlarged view of part A in Fig. 6 of the present invention.

As shown in FIG. 7 , two annular bosses 13 are respectively disposed on both sides of the wheel body 11 , both of the two annular bosses 13 surround the mounting seat 12 and the axes of the two annular bosses 13 coincide with the axis of the wheel body. The outer peripheral surfaces of the two annular bosses 13 are both flush with the outer peripheral surface of the wheel body 11 . The edge position of the top surface of the annular boss 13 has a circle of arc-shaped grooves 131, the bottom surface of the arc-shaped groove 131 is in the shape of a circular arc, and the depth of the arc-shaped groove 131 is gradually from approaching the mounting portion to the direction away from the mounting portion. Increase and then decrease.

In order to improve the stability of the annular boss 13 and the wheel body 11 , the inner peripheral surface of the annular boss 13 and the end surface of the wheel body are transitionally connected by a circular arc surface. In addition, an annular groove is formed on the inner peripheral surface of the annular boss 12 .

The arc-shaped groove 131 is designed in a circular arc shape, which can accommodate more gas during the rotation of the impeller 1 , thereby improving the gas transmission power of the impeller 1 . In addition, in the actual use process, the main bearing force of the blade 14 is mainly concentrated on the side close to the mounting part, and the position and shape of the arc groove 131 make the thickness of the side of the annular boss 13 close to the mounting part larger than that of the annular convex The thickness of the side of the table 13 away from the mounting portion increases the connection strength of the blade 14 .

Fig. 8 is a partial enlarged view of B in Fig. 5 of the present invention.

As shown in FIG. 8 , two air passage grooves 111 are provided at the edge of the wheel body 11 , and the two air passage grooves 111 are symmetrically arranged around the axis of the annular boss 13 . The air passage groove 111 penetrates the wheel body 11 from the groove bottom surface of the arc groove 131 on one side and extends to the groove bottom surface of the arc groove 131 on the other side, so as to communicate with the arc grooves 131 located on both sides of the wheel body 11 to balance the impeller 1. The air pressure on both sides of the impeller 1 during high-speed operation ensures that the impeller 1 is always in a dynamic balance state.

As shown in FIG. 3 and FIG. 8 , the outer shape of the blade 14 is arc-shaped and has a convex portion. The plurality of blades 14 located on the same side are all located in the arc-shaped groove 131, and the convex parts of the blades 14 are all arranged clockwise, that is, the convex parts of the blades 14 are all located on the circle with the center of the wheel body 11 as the center of the circle. , and the convex direction of each convex part faces the clockwise direction of the circle. The position where the blade 14 is connected to the arc-shaped groove 131 is the extension starting part, the blade 14 extends along the axis of the annular boss 13 from the extension starting part, and the extended side surface is flush with the top surface of the annular boss 13 . In addition, the side surface of the blade 14 away from the mounting portion is flush with the outer peripheral surface of the wheel body 11 .

Through the above design, the blades 14 are formed in a semi-enclosed and fixed manner, thereby strengthening the connection strength of the blades 14 and improving the bearing capacity of the blades 14 . In addition, the extended side surface of the vane is flush with the top surface of the annular boss, and the side surface of the vane away from the mounting portion is flush with the outer peripheral surface of the wheel body, which can prevent the vane from interfering with the pump body.

In order to improve the dynamic balance performance of the impeller 1 , the extension starting part on one side of the wheel body 11 is between the adjacent extension starting parts on the other side.

In this embodiment, the impeller 1 is integrally formed by a CNC machining center. In other embodiments, the wheel body 11 and the annular boss 13 are fixedly connected by bolts, and the blades 14 are fixed on the annular boss by welding. 13 in the arc-shaped groove 131.

FIG. 9 is a partial enlarged view of C in FIG. 3 of the present invention.

As shown in FIGS. 7 and 9 , the end of the blade 14 extending from the bottom of the arc groove bottom along the axial direction of the annular boss has a groove portion 141 , and the groove portion 141 is located on one side of the convex surface of the blade. The groove part is composed of two smoothly connected arc surfaces and a flat surface.

The driving member 2 is an electric motor, which has a casing (not shown in the figure), a stator (not shown in the figure) and a rotor (not shown in the figure). The rotor is located inside the casing and is rotatably connected with the casing, and the stator is located between the rotor and the casing and is fixedly connected with the casing. One side of the rotor has a drive shaft 21 extending out of the housing, the drive shaft 21 has three key grooves, all three key grooves are rectangular grooves, and the length direction of the three key grooves is parallel to the length direction of the drive shaft 21 . The three key grooves on the drive shaft 21 are in one-to-one correspondence with the key grooves on the three impellers 1 to form three key chambers for placing keys.

As shown in Figure 2, the pump body 3 is composed of two symmetrically designed pump casings. The shape of the pump casing is cylindrical. The side of the pump casing has an installation chamber, a working chamber, and an intermediate chamber communicating with the installation chamber and the working chamber. The two pump casings are spliced with each other so that the two installation chambers, the two working chambers and the two intermediate chambers are in one-to-one correspondence, thereby forming an accommodating chamber. The peripheral surface of the pump casing has two semicircular through holes, and the through holes on the two pump casings form an air inlet and an air outlet communicating with the accommodating working chamber in a one-to-one correspondence.

The drive shaft 21 passes through an installation chamber in a pump body 3 and is rotatably connected to the pump casing through two bearings. An impeller 1 is sleeved on the drive shaft 21 through the installation part, and is fixedly connected to the drive shaft 21 through a key, thereby Form the air pump unit. The installation part of the impeller 1 is located in the installation chamber, the annular boss 13 of the impeller 1 and the impeller 1 are located in the working chamber, and the wheel body 11 connecting the mounting seat 12 and the annular boss 13 is located in the middle chamber.

In this embodiment, the three pump bodies 3 are arranged coaxially. In order to improve the stability between adjacent pump bodies 3, the outside of the pump body 3 has seven connection seats distributed along the axis of the pump body 3, and the connection seat has one A through hole parallel to the axis of the pump body 3. The through holes on the adjacent pump bodies 3 are on the same straight line, and the seven groups of bolt assemblies 31 pass through the through holes on the body in sequence, so as to connect the three pump bodies 3 fixedly. In addition, the pump body 3 in the middle is fixedly connected to the pump bodies 3 on both sides through eight bolts 32 respectively, which further improves the stability of the connection between the pump bodies 3 .

In order to prevent the three air pump units from being separated from the drive shaft 21, in this embodiment, the side surface of the pump body 3 close to the casing has two rings of annular bosses, and the two rings of annular bosses form a ring of clamping grooves. The side surface of the casing has a clamping block which is matched with the clamping groove, and the clamping block is clamped in the clamping groove to fixedly connect the pump body 3 and the driving member 1 .

In this embodiment, the driving member 2 is fixedly connected to the pump body 3 by means of snap connection, and directly drives the impeller to rotate through the driving shaft 21 . In other embodiments, the driving member 2 and the pump body 3 can also determine the positional relationship between the two through a mounting frame, and use an intermediate transmission mechanism, such as a cardan shaft, a reducer, and a drive transmission.

As shown in Figure 2, the three air seats 4 are formed by splicing two symmetrical seat bodies, and two semicircular channels with parallel axes are opened on one side of the seat body, and the semicircular channels on the two seat bodies are one Correspondingly, the air inlet 41 and the air outlet 42 are formed. The seat body is fixed at the air inlet and the air outlet of the pump body 3 by means of bolt connection, so that the air inlet 41 communicates with the air inlet on the pump body 3 , and the air outlet 42 communicates with the air outlet on the pump body 3 . Each seat body is provided with two threaded holes, and the three air seats 4 have a total of 12 threaded holes.

FIG. 10 is a schematic diagram of a general air intake in an embodiment.

As shown in FIG. 10 , the general air intake member 5 in this embodiment has one general air intake passage 51 and three air intake branch passages 52 communicating with the general air intake passage 51 . There are 12 mounting holes on the total air intake 5, and 12 connecting bolts pass through the corresponding mounting holes and are threadedly connected with the threaded holes on the seat body, so that the total air intake 5 is fixed on the air seat 4, so that the air The intake passage 41 on the seat 4 communicates with the three intake branch passages 52 on the general intake member 5 and the general intake passage 51 .

Fig. 11 is a schematic view of the total air outlet in the embodiment.

As shown in FIG. 11 , the general air outlet 6 in this embodiment has one general air outlet 61 and three air outlet branches 62 communicating with the general air outlet 61 . The total air outlet 6 is provided with 12 installation holes, and 12 connecting bolts pass through the corresponding installation holes and are threadedly connected with the threaded holes on the seat body, so that the total air outlet 6 is fixed on the air seat 4, so that the air seat 4 The upper air outlet 42 and the three air outlet branches 62 on the general air outlet 6 communicate with the general air outlet 61 .

The heat sink 7 includes a heat sink and a plurality of heat sinks. The heat sink is fixed on the pump body 3 at the left end by bolting, and the heat sinks 7 are fixed on the other two pump bodies 3 by welding.

The vortex air pump 100 provided in this embodiment is connected with three air pump units in parallel, and its working process is as follows: the motor is energized to drive the rotor to rotate, the rotor drives the three impellers 1 to rotate simultaneously through the drive shaft 21 , and the gas is discharged from the main air inlet 51 at this time. , the air inlet branch 52, the air inlet 41, the air inlet, and the working chamber are pressurized by the rotating impeller 1, and the pressurized gas is discharged from the pump through the air outlet, the air outlet branch 62, and the general exhaust duct 61. body 3.

During the working process of the vortex air pump 100 , the impeller 1 is in a high-speed rotation state. Since the vanes 14 are fixed in a semi-enclosed manner, the connection strength between the vanes 14 and the wheel body 11 is improved. In addition, the impeller 1 has an air passage groove 111, and the air passage groove 111 is used for connecting the arc grooves 131 on both sides of the wheel body 11 to balance the air pressure on both sides. Therefore, the vortex air pump provided in this embodiment can operate at a rotational speed of 10000 r/min.

In this embodiment, the driving member 2 drives three air pump units connected in parallel, so that the air delivery volume of the vortex air pump 100 can be increased. In other embodiments, the air delivery volume can be increased by increasing the number of air pump units, such as four air pump units, five air pump units, and the like.

实施例的作用与效果Action and effect of the embodiment

According to the vortex type air pump involved in the utility model, the vortex air pump comprises 3 impellers, a driving part, 3 pump bodies, an air seat, a total air inlet part and a total air outlet part. The drive shaft on the drive frame extends into the pump body and the impeller in the pump body is fixed The air seat is arranged at the air inlet and the air outlet on the pump body, the total air inlet is arranged on the air seat and communicated with the air inlet, and the total air outlet is arranged on the air seat and communicated with the air outlet, so as to be connected in parallel Connecting the airflow generated by the three impellers increases the air delivery volume of the vortex air pump.

In addition, the impeller in the vortex air pump includes a wheel body, a mounting part arranged in the middle of the wheel body, annular bosses located on both sides of the wheel body and surrounding the mounting part, and a plurality of blades, wherein the edge parts of the sides of the annular bosses on both sides are An arc-shaped groove is formed, and the cross-sectional line of the groove bottom surface of the arc-shaped groove is in the shape of an arc. , the main bearing force of the blade is mainly concentrated on the side close to the mounting part, and the location and shape of the arc groove make the thickness of the side of the annular boss close to the mounting part greater than the thickness of the side of the annular boss away from the mounting part, Such a design improves the bearing strength of the annular boss on the side close to the mounting portion. In addition, since the plurality of vanes are located in the arc-shaped groove and are fixedly connected to the annular boss in a semi-circumferential manner, the contact area between the vanes and the annular boss can be increased. Therefore, the overall strength of the impeller provided by the utility model is greatly improved, and the impeller can withstand the centrifugal force brought by the rotational speed of 10000 r/min or more.

According to the vortex type air pump involved in the present invention, the edge of the impeller wheel body is provided with an air passage extending from the bottom surface of the arc-shaped groove groove on one side to the bottom surface of the arc-shaped groove groove on the other side. The gas can pass through the gas passage, so the air pressure on both sides of the wheel body can be balanced when the impeller is in a dynamic state of high speed, so as to ensure that the impeller is in a dynamic balance state, so as to realize the high-speed operation of the impeller.

According to the vortex air pump of the present invention, because the design of the arc groove increases the space between two adjacent blades, it can accommodate more gas, thereby improving the efficiency of the impeller to compress the gas.

In the vortex air pump provided by the utility model, because the blades of the wheel bodies on both sides are arranged in a staggered manner, the distribution of the blades is more uniform, thereby improving the dynamic balance performance of the impeller.

The vortex-type air pump in this modification is substantially the same in structure as the vortex-type air pump 100 in the embodiment, and the difference lies in that the total air inlet part and the total air outlet part on the air seat are changed to the serial part 8, so that the three air pump units The output air flows are connected in series.

FIG. 12 is a schematic diagram of a serial member in a modification.

As shown in FIG. 12 , the serial member 8 has a general air inlet 81 , a general air outlet 82 and two air passages 83 . The external shape of the serial member 8 is rectangular, and its four corners have through holes. The connecting bolts pass through the through holes and are threadedly connected to the air seat, so that the serial member is fixed on the air seat, so that the total air inlet 81 is communicated with the air inlet 41 of the left air seat, and the total air outlet 82 is connected to the right air seat. The air outlet 42 is connected, one of the air passages 83 is connected to the air outlet 42 on the left air seat and the air inlet 41 of the middle air seat, and the other air passage 83 is connected to the air outlet 42 on the middle air seat and the middle right air seat. the intake port 41.

In the actual working process, after the left pump body compresses the gas, the compressed gas enters the middle pump body through the gas passage in the serial member 8 to be compressed again, and the recompressed gas passes through the gas passage in the serial member 8. The channel enters the right pump body for final compression, so as to obtain gas with higher pressure to meet the working requirements of actual gas-consuming equipment.

In this modification, the serial member 8 is an integral structure, which is used to connect the air inlets and air outlets of adjacent pump bodies in series, so as to realize the step-by-step pressure of the gas, so as to meet the working requirements of the gas-using equipment. In other embodiments, the serial member 8 can also be in the form of an assembly, as long as the same function can be achieved. For example, the serial member 8 can be composed of multiple pipe fittings, and the air outlet of the left pump body is connected to the middle through the pipe fittings respectively. The air inlet of the pump body is connected, and the air outlet of the middle pump body is connected with the air inlet of the right pump body.

In addition, in other modifications, in order to obtain gas with higher pressure, multiple air pump units can be connected in series in sequence, such as four air pump units, five air pump units, six air pump units, etc., and increase according to the actual pressure demand The number is sufficient, and the number of other air pump units will not be illustrated here.

The above-mentioned embodiments are preferred cases of the present invention, and are not intended to limit the protection scope of the present invention.

Claims

An impeller installed in an air pump for pressurizing gas, characterized in that it includes:

a wheel body, the middle part is provided with a mounting part for being sleeved on the drive shaft;

two annular bosses, respectively disposed on both sides of the wheel body and formed around the mounting portion;

two arc-shaped grooves, respectively formed along the edge of the annular boss;

a plurality of blades, located in the arc-shaped groove;

Wherein, the sectional line of the groove bottom surface of the arc-shaped groove is in the shape of an arc, and the depth of the arc-shaped groove gradually increases and then decreases in the direction from approaching the mounting portion to being away from the mounting portion.
The impeller according to claim 1, is characterized in that:

Wherein, the edge portion of the wheel body is provided with an air passage groove which passes through the wheel body from the bottom surface of the arc-shaped groove groove on one side and extends to the bottom surface of the arc-shaped groove groove on the other side.
The impeller according to claim 1, is characterized in that:

Wherein, each of the blades respectively extends from the bottom surface of the arc-shaped groove along the axial direction of the annular boss, and the outer side surface formed by the extension of the blade is flush with the side surface of the annular boss.
The impeller according to claim 1, is characterized in that:

Wherein, the position where the blade is connected to the arc-shaped groove is an extension starting portion, and the extension starting portion located on one side of the wheel body is between adjacent extending starting portions on the other side.
The impeller according to claim 1, is characterized in that:

Wherein, a plurality of the blades are arc-shaped, and each has a convex portion, and the convex portions on the plurality of the blades located on the same side are all arranged clockwise.
The impeller according to claim 1, is characterized in that:

Wherein, the side surface of the blade away from the mounting portion is flush with the outer peripheral surface of the wheel body.
The impeller according to claim 1, is characterized in that:

Wherein, the axes of the two annular bosses coincide with the axes of the wheel body.
A vortex air pump, characterized in that, comprising:

a plurality of pump bodies connected in sequence, each having a accommodating chamber formed in the interior and an air inlet and an air outlet communicating with the chamber;

a plurality of impellers, corresponding to the pump body one-to-one to form an air pump unit, and a plurality of the impellers are respectively arranged in the accommodating chamber;

a driving member, which has a driving shaft, and the driving shaft penetrates each of the pump bodies;

Wherein, the impeller is the impeller according to any one of claims 1 to 7,

The mounting parts of each of the impellers are sleeved on the drive shaft, and are rotated under the drive of the drive shaft to form airflow.
The vortex air pump according to claim 8, further comprising:

a plurality of air seats, respectively mounted on the pump body, each having an air inlet communicating with the air inlet and an air outlet communicating with the air outlet;

A general air intake piece, mounted on the air seat, has a plurality of air intake branches corresponding to the air intake passages one-to-one, and an air intake main passage connecting each of the air intake branch passages, for parallel communication air entering a plurality of said pump bodies;

The general air outlet is installed on the air seat, and has a plurality of air outlet branches corresponding to the air outlet channels one-to-one, and an air outlet main channel connecting each of the air outlet branches, and is used for parallel communication from a plurality of the air outlet channels. The airflow output by the pump body.
The vortex air pump according to claim 8, further comprising:

a plurality of air seats, respectively mounted on the pump body, each having an air inlet communicating with the air inlet and an air outlet communicating with the air outlet;

A plurality of in-line parts are used for connecting the air inlet passages and the air outlet passages of the adjacent air seats, so as to connect the air flows outputted by the air pump units in series.