CN220212819U

CN220212819U - Axial-flow centrifugal combined dust collection device

Info

Publication number: CN220212819U
Application number: CN202222795398.5U
Authority: CN
Inventors: 杨鹏歆; 梁宇静
Original assignee: Guangzhou Faston Smart Home Co ltd
Current assignee: Guangzhou Dianpainting Technology Co ltd
Priority date: 2022-10-24
Filing date: 2022-10-24
Publication date: 2023-12-22
Anticipated expiration: 2032-10-24

Abstract

The utility model discloses an axial-flow centrifugal composite dust collection device, which belongs to the technical field of dust collection devices, and adopts the main technical scheme that: the shell is provided with an air duct; a transition piece mounted on the housing; the driving piece is arranged on the shell and is provided with a front shaft end and a rear shaft end, and a cutting piece is arranged on the front shaft end; a combination turbine mounted on the aft shaft end and located within the transition piece; a fairing mounted on the transition piece; the dust hood is arranged on the shell. The utility model combines the advantages of the axial flow fan and the centrifugal fan, on one hand, the utility model can provide larger air quantity to accommodate more dust, on the other hand, the utility model can provide large air pressure to resist the internal resistance of the device, so that the dust can be smoothly and rapidly discharged, and the dust removing effect is better.

Description

Axial-flow centrifugal combined dust collection device

Technical Field

The utility model relates to the technical field of dust collection devices, in particular to an axial-flow centrifugal composite dust collection device.

Background

When boards such as boards and composite boards are cut by cutting tools such as milling cutters and the like rotating at high speed, a lot of dust and scraps are generated, and if the dust and scraps are not cleaned immediately, a lot of adverse effects can be generated: firstly, environmental pollution is caused, the health of personnel is endangered, and even the workers generate diseases such as silicosis and the like; secondly, the scraps and the cutter are rubbed at a high speed, the cutter is worn out rapidly, so that the cutter is replaced frequently, and consumable materials are increased; finally, because the chips and the cutters are rubbed to generate high temperature, the processing speed of the equipment is reduced, the efficiency is reduced, and on the other hand, the high temperature can cause the chips to fire, so that disaster accidents are caused. Therefore, the dust and debris need to be cleaned in time.

In the prior art, in order to clean dust and debris, the purpose is often achieved by adding a dust suction device with negative pressure to a cutting tool, and generally, the dust suction device is provided with a pipeline and a negative pressure fan connected with the pipeline, and the existing negative pressure fan generally has the following two forms:

one is the centrifugal fan, this kind of fan adopts the centrifugal fan, can provide great wind pressure, but the velocity of flow of the air current is not fast, lead to the amount of wind too little, unable to hold a lot of dust and detritus, and the centrifugal fan is along the radial side air-out of pivot, when the dust absorption pipeline inner structure is complicated, the wind pressure can be weakened a lot; the other type is an axial flow fan, the fan can accelerate air flow, and the accelerated air flow flows along the axial direction of the rotating shaft, so that larger air quantity can be generated to entrain more dust and chips, however, the air pressure is inferior to that of the centrifugal fan, dust and chips with larger weight are not easy to suck, and the dust collection effect is also not ideal.

In view of this, improvements to existing dust extraction devices are needed to accommodate the operating conditions of sheet material cutting.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides an axial-flow centrifugal composite dust collection device.

The utility model provides an axial-flow centrifugal composite dust collection device, which comprises: the shell is provided with an air duct; a transition piece mounted on the housing; the driving piece is arranged on the shell and is provided with a front shaft end and a rear shaft end, and a cutting piece is arranged on the front shaft end; a combination turbine mounted on the aft shaft end and located within the transition piece; a fairing mounted on the transition piece; the dust hood is arranged on the shell.

Preferably, the combined turbine comprises a plurality of axial flow blades and a plurality of centrifugal blades.

Preferably, the shell comprises an outer shell, an inner shell and a plurality of separation parts, wherein the inner shell is arranged in the outer shell, the separation parts are connected between the outer shell and the inner shell, and the air channels are formed between the adjacent separation parts; the driving member is mounted in the inner housing.

Preferably, the driving member is a biaxial motor, and one end of a working shaft of the driving member is used as the front shaft end, and the other end is used as the rear shaft end.

Preferably, the combined turbine further comprises a rotating part, and the axial flow fan blades and the centrifugal fan blades are both arranged on the rotating part; the rotating part is provided with a shaft hole, and the rear shaft end of the driving piece is arranged in the shaft hole.

Preferably, the centrifugal fan blades are arranged in one layer along the axial direction of the driving piece, and the axial flow fan blades are arranged in two layers along the axial direction of the driving piece; the axial flow fan blade is closer to the driving member than the centrifugal fan blade in a direction along an axis of the driving member.

Preferably, the transition piece comprises an acceleration section and a pressurization section, the acceleration section has a straight cylinder structure, the acceleration section is connected with the shell, the pressurization section is connected on the acceleration section, and the pressurization section has an arc-shaped side wall; the axial flow fan blade corresponds to the accelerating section, and the centrifugal fan blade corresponds to the pressurizing section.

Preferably, the fairing comprises a wind bowl and guide vanes, the wind bowl comprises a rectifying part and a connecting part, the rectifying part is connected with the pressurizing section, and the connecting part is connected with the rectifying part; the flow guide She Lianjie is on the rectifying portion.

Preferably, the fairing further comprises a mating portion disposed within the bowl with the deflector She Lianjie between the bowl and the mating portion.

Preferably, the mating portion is provided with a mating face, which faces the combined turbine; the combined turbine further comprises a guide part, wherein the guide part is installed on the rotating part, and the guide part corresponds to the matching surface of the matching part.

The beneficial effects of this application lie in:

on the one hand, the advantages of the axial flow fan and the centrifugal fan are fused, in the combined turbine of the double-layer axial flow fan and the single-layer centrifugal fan, the double-layer axial flow fan can accelerate the air flow, so that larger air quantity is provided to accommodate larger dust, the single-layer centrifugal fan can provide large air pressure to resist the resistance in the device, so that strong power is provided for the air flow with dust and chips to pass through a conveying pipeline, and the problems of insufficient air pressure when the axial flow fan is used singly and poor dust removal effect caused by insufficient air quantity when the centrifugal fan is used singly are solved.

On the other hand, in the process of collecting dust and fragments on the panel, the air flow is guided through the straight part of the air inlet channel and then guided through the bending part, so that upward cyclone can be generated in the dust hood, the middle vacuum degree of the cyclone is higher, the static fragments on the panel are lifted, the static fragments smoothly enter the air channel to be collected, and the dust removal is faster and more efficient.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

FIG. 1 is a schematic view of the whole structure of the first view angle of the present utility model;

FIG. 2 is a schematic diagram of the overall structure of the second view angle of the present utility model;

FIG. 3 is a schematic view of an explosion structure at a first view angle according to the present utility model;

fig. 4 is a schematic diagram of an explosion structure at a second view angle according to the present utility model.

Reference numerals illustrate:

1. a housing; 11. a housing; 111. a mounting hole; 12. an inner case; 13. a partition portion; 131. an air duct;

2. a transition piece; 21. an acceleration section; 22. a pressurizing section; 221. fitting the protruding blocks;

3. a driving member; 31. a front shaft end; 32. a rear shaft end; 33. a cutting member;

4. a combination turbine; 41. a rotating part; 411. a shaft hole; 42. axial flow fan blades; 43. centrifugal fan blades; 44. a guide section;

5. a fairing; 51. a wind bowl; 511. a rectifying unit; 5111. a connection bump; 512. a connection part; 52. a guide vane; 53. a mating portion; 531. a mating surface; 532. a dome;

6. a dust hood; 61. a connection frame; 611. a mounting notch; 62. a telescopic cavity; 621. connecting the top surface; 622. connecting the bottom surface; 623. an arc edge; 624. an air inlet; 63. an air inlet cover; 631. a bonding surface; 632. an air inlet channel; 6321. a straight portion; 6322. a bending part.

Detailed Description

Various embodiments of the utility model are disclosed in the following drawings, in which details of the practice are set forth in the following description for the purpose of clarity. However, it should be understood that these practical details are not to be taken as limiting the utility model. That is, in some embodiments of the utility model, these practical details are unnecessary. Moreover, for the sake of simplicity of the drawing, some well-known and conventional structures and elements are shown in the drawings in a simplified schematic manner.

It should be noted that all directional indications such as up, down, left, right, front, and rear … … in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture such as that shown in the drawings, and if the particular posture is changed, the directional indication is changed accordingly.

In addition, the descriptions of the "first", "second", etc. in this application are for descriptive purposes only and are not intended to specifically indicate a sequential or a cis-position, nor are they intended to limit the utility model, but are merely intended to distinguish between components or operations described in the same technical term, and are not to be construed as indicating or implying a relative importance or implying that the number of technical features indicated is not necessarily limited. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

For a further understanding of the utility model, its features and advantages, reference is now made to the following examples, which are illustrated in the accompanying drawings in which:

referring to fig. 1-4, an axial-flow centrifugal combined type dust collection device disclosed by the utility model comprises a shell 1, a transition piece 2, a driving piece 3, a combined turbine 4, a fairing 5 and a dust collection cover 6, wherein the driving piece 3 is installed in the shell 1, the combined turbine 4 is installed on the driving piece 3, the fairing 5 is installed on the shell 1 through the transition piece 2, the combined turbine 4 is covered in the transition piece 2 and the fairing 5, the dust collection cover 6 is also installed on the shell 1, when the device is in operation, the driving piece 3 is electrified and started, the combined turbine 4 works, so that air flow carrying dust and debris enters the shell 1 through the dust collection cover 6, and finally flows out from the end of the fairing 5 through drainage, diversion and fairing of the air flow passing through the transition piece 2 and the fairing 5, so that the dust and the debris carried in the dust collection cover is collected and treated. The utility model is applicable to the use of sheet cutting, but is not limited to sheet cutting, and can be retrofitted to any apparatus that produces dust or debris.

Referring to fig. 1 to 4, the housing 1 includes an outer housing 11, an inner housing 12 and a partition 13, wherein the outer housing 11 has a cylindrical structure with openings at both ends, the cross section of the outer housing 11 is rectangular, the inner housing 12 is mounted inside the outer housing 11, the inner housing 12 has a cylindrical structure, openings are also provided at both ends of the inner housing 12, and a gap is provided between the inner housing 12 and the outer housing 11; the partition 13 is provided with a plurality of, and partition 13 is rectangular shaped plate, and partition 13 sets up in the clearance between inner shell 12 and shell 11 to along the length direction of inner shell 12 and shell 11, partition 13 and inner shell 12 and shell 11 are fixed connection, make inner shell 12 can keep the relative fixed with shell 11 in the position, form wind channel 131 between the adjacent partition 13, be used for making the air current pass through.

Referring to fig. 1 to 4, the transition piece 2 includes an acceleration section 21 and a pressurizing section 22, the acceleration section 21 is installed at an opening at one end of the housing 11, and a main body of the acceleration section 21 is a long straight cylinder with two ends open for guiding high-speed air flow; the pressurizing section 22 is of a flaring bowl-shaped structure, the side wall of the pressurizing section 22 is of an outwards protruding arc-shaped structure, round openings are formed in two ends of the pressurizing section 22, small-end openings of the pressurizing section 22 are integrally connected to the opening of the accelerating section 21, which is away from the shell 11, a plurality of matching protruding blocks 221 are arranged on the edge of the large-end opening of the pressurizing section 22, through holes are formed in the matching protruding blocks 221 and used for connecting the fairing 5, and the direction of the air flow in the pressurizing section 22 is changed, so that higher air pressure is generated.

Referring to fig. 1 to 4, the driving member 3 employs a dual-shaft motor, the driving member 3 is fixedly installed in the inner housing 12, the shaft of the driving member 3 is arranged along the axial direction of the inner housing 12, the working shaft of the driving member 3 has two working ends, the end of the shaft of the driving member 3, which is away from the transition member 2, is a front shaft end 31, the end of the shaft of the driving member 3, which is close to the transition member 2, is a rear shaft end 32, the front shaft end 31 of the driving member 3 is installed with a cutting member 33, in this embodiment, the cutting member 33 is a milling cutter, and the milling cutter can be driven to rotate when the driving member 3 works so as to realize the function of cutting the wood board; the rear shaft end 32 of the drive member 3 is connected to the combined turbine 4.

Referring to fig. 1 to 4, the combined turbine 4 includes a rotating part 41, an axial flow fan 42, a centrifugal fan 43 and a guiding part 44, wherein the rotating part 41 has a rod-shaped structure, a shaft hole 411 is formed at the axis of the rotating part 41, the rear shaft end 32 of the driving part 3 is penetrated in the shaft hole 411 and is fixedly connected with the rotating part 41, the side wall of the rotating part 41 is obliquely arranged, the axial flow fan 42 and the centrifugal fan 43 are fixedly connected on the side wall of the rotating part 41, the axial flow fan 42 is relatively closer to the driving part 3 along the axial direction, the centrifugal fan 43 is relatively farther away from the driving part 3 along the axial direction, the axial flow fan 42 and the centrifugal fan 43 are respectively provided with a plurality of air exhaust directions along the axial direction for improving the flow velocity of air flow, and the air exhaust directions of the centrifugal fan 43 are perpendicular to the axial direction for pressurizing the air flow and resisting the resistance generated inside the device; the guiding portion 44 is a circular plate, the guiding portion 44 is disposed at an end of the rotating portion 41 facing away from the driving member 3 and is coaxially fixed to the rotating portion 41, and the guiding portion 44 is used for providing guiding function for the air flow, so that the air flow after being pressurized can bypass the guiding portion 44 and flow through the outer side of the guiding portion 44.

Referring to fig. 1 to 4, specifically, the axial flow fan blades 42 are provided with two layers, each layer of axial flow fan blades 42 is provided with a plurality of axial flow fan blades, each layer of axial flow fan blades 42 is uniformly arranged at equal intervals along the circumferential direction of the outer wall of the rotating part 41, and a space is provided between two adjacent layers of axial flow fan blades 42; the centrifugal fan blades 43 are provided with a layer, and the centrifugal fan blades 43 are uniformly arranged at equal intervals along the circumferential direction of the outer wall of the rotating part 41; the two layers of axial flow fan blades 42 are correspondingly arranged in the acceleration section 21 of the transition piece 2, the centrifugal fan blades 43 are correspondingly arranged in the pressurization section 22 of the transition piece 2, after the air flow is accelerated by the axial flow fan blades 42, larger air quantity can be generated at the dust hood 6, the action range of the device when dust and chips are sucked is improved, and the pressure of the air flow can be increased after the air flow passes through the centrifugal fan blades 43, so that the device is facilitated to suck a larger quantity of dust and chips.

Referring to fig. 1 to 4, the fairing 5 includes a wind bowl 51, a guide vane 52 and a matching portion 53, wherein the wind bowl 51 includes a fairing portion 511 and a connecting portion 512, the fairing portion 511 has a horn-shaped structure, two ends of the fairing portion 511 are both provided with openings, a large end opening of the fairing portion 511 is connected to an opening of the pressurizing section 22 of the transition piece 2, a connecting bump 5111 is provided at an edge of the large end opening of the fairing portion 511, a through hole is provided on the connecting bump 5111, the fairing portion 511 is connected to the pressurizing section 22 through a connecting piece (not shown in the drawing) penetrating between the connecting bump 5111 and the matching bump 221, the connecting portion 512 is integrally connected to a small end opening of the fairing portion 511, the connecting portion 512 has a cylindrical structure, and the connecting portion 512 can be connected to a pipe for collecting dust and debris, thereby collecting dust and debris.

Referring to fig. 1-4, the mating portion 53 of the fairing 5 is a rotating body, the mating portion 53 is coaxially disposed inside the wind bowl 51, a space is provided between the mating portion 53 and an inner wall of the wind bowl 51, the mating portion 53 is provided with a mating surface 531 facing the combined turbine 4 along an axial direction, the mating portion 53 is further provided with a dome 532 facing away from the combined turbine 4 along the axial direction, the mating surface 531 is a plane, the size and the dimension of the mating surface 531 are the same as those of the guiding portion 44, the mating portion 53 has an arc-shaped outer wall, and the mating surface 531 is matched with the guiding portion 44 to provide guidance for air flow, so that the air flow after pressurization can flow through the space between the mating portion 53 and the wind bowl 51, and rectification is facilitated.

Referring to fig. 1-4, the guide vanes 52 of the fairing 5 are provided with a plurality of arc-shaped vanes, the guide vanes 52 are arranged at intervals between the matching part 53 and the fairing 511, the guide vanes 52 are fixedly connected with the matching part 53 and the fairing 511, the guide vanes 52 are uniformly spaced around the axis direction of the matching part 53, channels are formed between the guide vanes 52, one end of each channel is led to the pressurizing section 22 of the transition piece 2, the other end of each channel is led to the connecting part 512 of the fairing 5, the guide vanes 52 can guide the direction of the pressurized airflow, turbulent flow is tidied into laminar flow, and finally the airflow flowing out of the connecting part 512 enters the connecting part 512 along the axis direction, so that the airflow is convenient to convey and collect.

Referring to fig. 1-4, the dust hood 6 is mounted at the opening of the housing 11 near the front shaft end 31, the dust hood 6 is integrally made of elastic material, in this embodiment, rubber, and the dust hood 6 includes a connection frame 61, a telescopic cavity 62 and an air inlet cover 63, wherein the connection frame 61 is of a tubular structure with a rectangular section, both ends of the connection frame 61 are provided with openings, the connection frame 61 is sleeved at the opening of the housing 11, the edge of the connection frame 61 near the opening of the rear shaft end 32 is provided with a mounting notch 611, correspondingly, the housing 11 is provided with a mounting hole 111, and the connection frame 61 is connected to the housing 11 through a connecting piece (not shown in the figure) penetrating through the mounting notch 611 and the mounting hole 111.

Referring to fig. 1-4, the telescopic cavity 62 is in a ring shape as a whole, the telescopic cavity 62 is connected at the opening of the connecting frame 61 deviating from the rear shaft end 32, the telescopic cavity 62 is provided with a telescopic top surface and a telescopic bottom surface, wherein the telescopic top surface is upwards close to the rear shaft end 32, the telescopic bottom surface is downwards deviating from the rear shaft end 32, the telescopic top surface is integrally connected with the connecting frame 61, an arc-shaped edge 623 is connected between the telescopic top surface and the telescopic bottom surface, the telescopic cavity 62 can form a flat cavity structure, an air inlet 624 is formed in the middle of the telescopic cavity 62, the air inlet 624 is a circular through hole, and the rear shaft end 32 of the driving piece 3 and the cutting piece 33 all penetrate through the air inlet 624 and extend to the lower side of the shell 11.

Referring to fig. 1 to 4, the air inlet cover 63 is a flared circular cover, the middle part of the air inlet cover 63 protrudes upwards, the small end opening of the air inlet cover 63 faces upwards and is fixedly connected with the edge of the air inlet 624, the large end opening of the air inlet cover 63 faces downwards, the edge of the large end opening of the air inlet cover 63 is provided with an attaching surface 631, the attaching surface 631 is a plane, and the attaching surface 631 is used for attaching with a panel to be cleaned, so that a semi-closed space is provided for generating wind pressure; the air inlet channels 632 are arranged on the attaching surface 631, the air inlet channels 632 are concave channels formed on the attaching surface 631, the air inlet channels 632 are uniformly distributed along the axial direction of the driving piece 3 at equal intervals, the air inlet channels 632 comprise a straight part 6321 and a bending part 6322, the straight part 6321 is arranged on the outer side edge of the attaching surface 631, the bending part 6322 extends inwards to the middle part of the air inlet cover 63, the bending part 6322 is of an arc-shaped structure, when air flows enter the air inlet cover 63, the air flows are guided through the straight part 6321 and then guided through the bending part 6322, and then upward whirlwind can be generated in the dust hood 6, the middle vacuum degree of the whirlwind is high, so that static chips on the panel can be raised, and the static chips on the panel can be smoothly enter the air duct 131 to be collected.

The implementation principle of the utility model is as follows: when the dust collecting device is used, the attaching surface 631 of the air inlet cover 63 is attached to a panel on which dust and fragments are to be collected, the driving piece 3 is electrified and started, the driving piece 3 drives the cutting piece 33 to work so as to cut a wood board, the fragments and the dust are generated, meanwhile, the driving piece 3 can drive the combined turbine 4 to work, the combined turbine 4 rotates at a high speed, the axial flow fan blades 42 and the centrifugal fan blades 43 of the combined turbine 4 can generate large-air-volume and high-air-pressure air flow, and therefore the dust and the fragments on the panel can enter the air channel 131 of the shell 1 along with the air flow through the air inlet channel 632 on the dust collecting cover 6, and after the dust and the fragments pass through the transition piece 2 and the fairing 5, the dust and the fragments are collected and processed through the conveying pipeline connected to the transition piece 2.

The beneficial effects of the utility model are as follows:

on the one hand, the advantages of the axial-flow fan and the centrifugal fan are combined, in the combined turbine 4 of the double-layer axial-flow fan blade 42 and the single-layer centrifugal fan blade 43, the double-layer axial-flow fan blade 42 can accelerate the air flow, so that larger air quantity is provided to accommodate larger dust, the single-layer centrifugal fan blade 43 can provide large air pressure to resist the resistance in the device, so that strong power is provided for the air flow with dust and chips to pass through a conveying pipeline, and the problems of insufficient air pressure when the axial-flow fan is used singly and poor dust removal effect when the centrifugal fan is used singly are solved.

On the other hand, in the process of collecting dust and debris on the panel, the air flow is guided by the straight portion 6321 of the air inlet channel 632 and then guided by the curved portion 6322, so that upward cyclone can be generated in the dust hood 6, the middle vacuum degree of the cyclone is higher, and static debris on the panel is lifted, and smoothly enters the air duct 131 to be collected, so that dust removal is faster and more efficient.

The above are merely embodiments of the present utility model, and are not intended to limit the present utility model. Various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, or the like, which is within the spirit and principles of the present utility model, should be included in the scope of the claims of the present utility model.

Claims

1. An axial-flow centrifugal composite dust collection device, characterized by comprising:

a housing (1), the housing (1) having an air duct (131);

a transition piece (2), the transition piece (2) being mounted on the housing (1);

a driving element (3), wherein the driving element (3) is arranged on the shell (1), the driving element (3) is provided with a front shaft end (31) and a rear shaft end (32), and a cutting element (33) is arranged on the front shaft end (31);

-a combined turbine (4), the combined turbine (4) being mounted on the rear shaft end (32) and being located within the transition piece (2);

a fairing (5), the fairing (5) being mounted on the transition piece (2);

and the dust hood (6), wherein the dust hood (6) is arranged on the shell (1).

2. The axial-flow centrifugal combined type dust collection device according to claim 1, wherein the combined turbine (4) comprises a plurality of axial-flow blades (42) and a plurality of centrifugal blades (43).

3. The axial flow centrifugal combined type dust collection device according to claim 2, wherein the housing (1) comprises an outer housing (11), an inner housing (12) and a plurality of separating parts (13), the inner housing (12) is arranged in the outer housing (11), the separating parts (13) are connected between the outer housing (11) and the inner housing (12), and the air duct (131) is formed between the adjacent separating parts (13);

the driving element (3) is mounted in the inner housing (12).

4. An axial-flow centrifugal combined type dust suction device according to claim 3, characterized in that the driving member (3) is a biaxial motor, one end of the working shaft of the driving member (3) being the front shaft end (31) and the other end being the rear shaft end (32).

5. The axial-flow centrifugal combined type dust collection device according to claim 4, wherein the combined turbine (4) further comprises a rotating part (41), and the axial-flow fan blades (42) and the centrifugal fan blades (43) are both installed on the rotating part (41);

the rotating part (41) is provided with a shaft hole (411), and the rear shaft end (32) of the driving piece (3) is arranged in the shaft hole (411).

6. The axial flow centrifugal composite dust collection device according to claim 5, wherein a plurality of the centrifugal fan blades (43) are arranged in one layer along the axial direction of the driving piece (3), and a plurality of the axial flow fan blades (42) are arranged in two layers along the axial direction of the driving piece (3);

the axial flow fan blade (42) is closer to the driving member (3) than the centrifugal fan blade (43) in a direction along the axis of the driving member (3).

7. The axial-flow centrifugal combined type dust collection device according to claim 5 or 6, wherein the transition piece (2) comprises an acceleration section (21) and a pressurization section (22), the acceleration section (21) has a straight cylinder structure, the acceleration section (21) is connected with the shell (1), the pressurization section (22) is connected on the acceleration section (21), and the pressurization section (22) has an arc-shaped side wall;

the axial flow fan blade (42) corresponds to the acceleration section (21), and the centrifugal fan blade (43) corresponds to the pressurizing section (22).

8. The axial-flow centrifugal combined type dust collection device according to claim 7, wherein the fairing (5) comprises a wind bowl (51) and a guide vane (52), the wind bowl (51) comprises a rectifying part (511) and a connecting part (512), the rectifying part (511) is connected with the pressurizing section (22), and the connecting part (512) is connected with the rectifying part (511); the guide vane (52) is connected to the rectifying portion (511).

9. The axial-flow centrifugal combined type dust collection device according to claim 8, wherein the fairing (5) further comprises a mating portion (53), the mating portion (53) is disposed in the wind bowl (51), and the guide vane (52) is connected between the wind bowl (51) and the mating portion (53).

10. The axial-flow centrifugal combined type dust suction device according to claim 9, characterized in that the mating portion (53) is provided with a mating surface (531), the mating surface (531) facing the combined turbine (4);

the combined turbine (4) further comprises a guide part (44), the guide part (44) is mounted on the rotating part (41), and the guide part (44) corresponds to a matching surface (531) of the matching part (53).