Fan device of integrated axial magnetic flux motor

Abstract

The fan device comprises a shell, an impeller, a main shaft, a stator winding and a permanent magnet, the main shaft is arranged in the shell in a rotating mode, the impeller is fixedly connected to one end of the main shaft, and an installation groove for containing the permanent magnet is formed in the end face of the impeller. The stator winding sleeves the outer side of the main shaft and is fixedly arranged on the inner wall of the shell; the stator winding and the permanent magnet are oppositely arranged; compared with the prior art, the arrangement mode of the impeller, the permanent magnet and the stator winding enables the magnetic flux and the size of the stator and the rotor in the radial direction to be increased, larger current and torque output is achieved, and therefore the advantages of being compact in structure, high in efficiency, large in torque, high in reliability and easy to maintain can be achieved; and after the permanent magnet and the impeller are designed into a whole, heat generated by the stator winding in the operation process is taken away by wind generated by the impeller, and an independent cooling structure does not need to be additionally arranged.

Description

Technical Field

[0001] The utility model relates to the technical field of fan structures, in particular to a fan device integrated with an axial flux motor. Background Art

[0002] Blade fans are a general term for a broad category of products, including centrifugal and axial flow types, and are further categorized as blowers, air compressors, and impeller-type vacuum pumps. A blade fan directly driven by a motor primarily consists of a collector, impeller, casing, and shaft. Some models also feature fairings and guide vanes. The main principle is generally to convert the kinetic energy of the fan impeller into that of the air, creating a pressure differential across the impeller. Devices that utilize negative pressure are called vacuum pumps, those that utilize lower positive pressure are called blowers, and those that utilize higher positive pressure are called air compressors.

[0003] Currently, medium- and low-speed bladed fans typically use pre-existing motors, assembled or connected to the impeller in various ways. High-speed bladed fans typically use permanent magnet or excitation motors, connected to the impeller via an electronic spindle. Both utilize modular motors to drive the impeller.

[0004] At present, fans tend to develop towards high speed. Existing solutions usually replace traditional motors with high-speed variable frequency motors, which have the problems of large size, need for independent cooling of high-speed motors, and low initial starting torque. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a fan device with an integrated axial flux motor to solve the problems in the prior art that the existing high-speed blade fans are large in size, require independent cooling of the high-speed motor, and have a small initial starting torque.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: a fan device with an integrated axial flux motor, comprising a casing, an impeller, a main shaft, a stator winding and a permanent magnet, wherein the main shaft is rotatably arranged in the casing and the impeller is fixedly connected to one end of the main shaft, a mounting groove for accommodating the permanent magnet is formed on the end face of the impeller, the stator winding is sleeved on the outside of the main shaft and fixedly arranged on the inner wall of the casing, and the stator winding and the permanent magnet are arranged facing each other.

[0007] Compared with the prior art, the present invention has the following beneficial effects:

[0008] 1. The energized stator winding forms an electromagnet, which drives permanent magnets of different polarities to rotate. The permanent magnets and impeller are designed as an integrated rotor, and the impeller rotates with the permanent magnets. The arrangement of the impeller, permanent magnets, and stator windings increases the radial magnetic flux and volume of the stator and rotor, achieving greater current and torque output. This results in a compact structure, high efficiency, high torque, high reliability, and simple maintenance.

[0009] 2. After the permanent magnet and the impeller are designed as one, the heat generated by the stator winding during operation is taken away by the wind generated by the impeller, and there is no need to set up an independent cooling structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A cross-sectional view of an embodiment of the present invention;

[0011] Figure 2 for Figure 1 Schematic diagram of the arrangement of permanent magnets on the impeller end face Figure 1 ;

[0012] Figure 3 for Figure 1 Schematic diagram of the arrangement of permanent magnets on the impeller end face Figure 2 ;

[0013] Figure 4 for Figure 1 Schematic diagram of the arrangement of permanent magnets on the impeller end face Figure 3 .

[0014] The figure marks in the drawings of the specification include: outer casing 1, fan housing 101, bearing seat 102, air duct 103, impeller 2, main shaft 3, large diameter section 301, small diameter section 302, stator winding 4, permanent magnet 5, locking nut 6, rotating connection 7, bearing 701, distance sleeve 702, and clamping nut 8. DETAILED DESCRIPTION

[0015] The present invention is further described in detail below through specific implementation methods:

[0016] As fans tend to be high-speed, existing solutions usually replace traditional motors with high-speed variable frequency motors. This improvement method results in larger fans, the need for independent cooling of the high-speed motor, and low initial starting torque. In order to solve this problem, Figure 1As shown, an embodiment of the utility model proposes a fan device with an integrated axial flux motor, including a casing 1, an impeller 2, a main shaft 3, a stator winding 4 and a permanent magnet 5. The main shaft 3 is rotatably arranged in the casing 1 and the impeller 2 is fixedly connected to one end of the main shaft 3. A mounting groove for accommodating the permanent magnet 5 is formed on the end face of the impeller 2. The stator winding 4 is sleeved on the outside of the main shaft 3 and fixedly arranged on the inner wall of the casing 1. The stator winding 4 and the permanent magnet 5 are arranged facing each other.

[0017] Here, the energized stator winding 4 forms an electromagnet, which drives the permanent magnets 5 of different polarities to rotate. The permanent magnets 5 and the impeller 2 are designed as a whole to serve as a rotor, and the impeller 2 rotates with the permanent magnets 5. The arrangement of the impeller 2, the permanent magnets 5 and the stator winding 4 increases the magnetic flux and volume of the stator and the rotor in the radial direction, thereby achieving a larger current and torque output, thereby achieving the advantages of compact structure, high efficiency, high torque, high reliability and simple maintenance. After the permanent magnets 5 and the impeller 2 are designed as a whole, the heat generated by the stator winding 4 during operation is carried away by the wind generated by the impeller 2, and there is no need to set up an independent cooling structure.

[0018] In this embodiment, the permanent magnet 5 can be fixed in the installation groove by means of adhesive bonding or the like.

[0019] like Figure 1 As shown, according to another embodiment of the present invention, a fan device with an integrated axial flux motor, wherein the outer casing 1 includes a fan housing 101 and a bearing 701 seat 102, the fan housing 101 has an air duct 103, and the impeller 2 is arranged in one end of the air duct 103; the bearing 701 seat 102 is fixedly connected to one end of the fan housing 101 close to the impeller 2, and the main shaft 3 and the stator winding 4 are both connected to the bearing 701 seat 102.

[0020] The wind generated by the impeller 2 during rotation is discharged along the air duct 103, and the bearing 701 seat 102 provides support for the installation of the main shaft 3 and the stator winding 4, and then provides installation support for the impeller 2 and the permanent magnet 5, so that the various structures in the fan device of the integrated axial flux motor are stably connected.

[0021] like Figure 1 As shown, according to another embodiment of the present invention, a fan device with an integrated axial flux motor is provided, wherein a gap is provided between the stator winding 4 and the impeller 2; because the stator winding 4 is different, the impeller 2 rotates, and the gap provides a movable space for the rotation of the impeller 2.

[0022] like Figure 1As shown, according to another embodiment of the present invention, a fan device with an integrated axial flux motor, wherein the main shaft 3 includes a large diameter section 301 and a small diameter section 302, one end of the large diameter section 301 is rotatably connected to the casing 1 through a rotating connector 7, and the stator winding 4 is sleeved on the outside of the large diameter section 301; one end of the small diameter section 302 is connected to the other end of the large diameter section 301 and the other end thereof passes through the mounting hole on the impeller 2 and is threadedly connected to a locking nut 6.

[0023] In the present invention, a limiting platform is formed between the large-diameter section 301 and the small-diameter section 302 , and the limiting platform cooperates with the locking nut 6 to stably mount the impeller 2 on the small-diameter section 302 .

[0024] The rotating connector 7 includes a bearing 701, which is fixedly mounted on the large-diameter section 301 and connected to an assembly hole formed in the housing 1. The bearing 701 rotatably connects the main shaft 3 to the housing 1. In this embodiment, there are two bearings 701, and a spacer sleeve 702 mounted on the large-diameter section 301 is disposed between the two bearings 701 to improve the assembly stability between the main shaft 3 and the housing 1, ensuring that the main shaft 3 can rotate stably after the main shaft 3 and the housing 1 are assembled.

[0025] Specifically, the assembly hole is opened on the bearing 701 seat 102 , and one end of the main shaft 3 is rotatably connected to the bearing 701 seat 102 through the cooperation of two bearings 701 and a distance sleeve 702 .

[0026] Among them, the end of the large diameter section 301 away from the small diameter section 302 is also connected to a clamping nut 8 placed outside the shell 1 and limiting the rotating connection 7. The clamping nut 8 stably limits the two bearings 701 and the distance sleeve 702 in the assembly hole to ensure that the rotation connection between the main shaft 3 and the bearing 701 seat 102 is more stable.

[0027] like Figure 1 As shown, according to another embodiment of the present invention, a fan device with an integrated axial flux motor, wherein the permanent magnet 5 has multiple permanent magnets 5 and in the present invention, the multiple permanent magnets 5 can be installed in the mounting slot in any of the following three arrangements but are not limited thereto.

[0028] The first arrangement mode: a plurality of permanent magnets 5 are connected end to end and arranged in a circular ring (such as Figure 2 ).

[0029] The second arrangement mode: a plurality of permanent magnets 5 are connected end to end and arranged in a polygonal star shape (such as Figure 3 ).

[0030] The third arrangement mode: some of the multiple permanent magnets 5 are arranged in a circular ring and the other parts are arranged in a scattered pattern, and the permanent magnets 5 arranged in a circular ring and the permanent magnets 5 arranged in a scattered pattern are arranged alternately (e.g. Figure 4 ).

[0031] The common feature of the above three arrangements is that they are arranged in a ring shape, which cooperates well with the stator winding 4.

[0032] The characteristics of the integrated axial flux motor can significantly reduce the use of silicon steel sheets in the stator winding 4, and can even achieve the use of no silicon steel sheets, so that the fan device has a fast response, high torque and simple maintenance.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A fan device with an integrated axial flux motor, comprising a housing, an impeller, a main shaft, a stator winding and a permanent magnet, characterized in that: The main shaft is rotatably arranged in the shell and the impeller is fixedly connected to one end of the main shaft. A mounting groove for accommodating a permanent magnet is formed on the end face of the impeller. The stator winding is sleeved on the outside of the main shaft and fixedly arranged on the inner wall of the shell. The stator winding and the permanent magnet are arranged facing each other.

2. A fan device integrated with an axial flux motor according to claim 1, characterized in that: There is a gap between the stator winding and the impeller.

3. The fan device integrated with an axial flux motor according to claim 1, characterized in that: There are multiple permanent magnets, which are connected end to end in sequence and arranged in a circular ring.

4. The fan device integrated with an axial flux motor according to claim 1, characterized in that: There are multiple permanent magnets, which are connected end to end in sequence and arranged in a polygonal star shape.

5. The fan device integrated with an axial flux motor according to claim 1, characterized in that: There are multiple permanent magnets, some of which are arranged in a circular ring shape and others in a scattered shape. The permanent magnets arranged in a circular ring shape and the permanent magnets arranged in a scattered shape are arranged alternately.

6. The fan device integrated with an axial flux motor according to claim 1, characterized in that: The main shaft comprises: A large diameter section, one end of which is rotatably connected to the housing via a rotating connector, and the stator winding is sleeved on the outside of the large diameter section; The small diameter section has one end connected to the other end of the large diameter section and the other end passes through the mounting hole on the impeller and is threadedly connected to a locking nut.

7. The fan device integrated with an axial flux motor according to claim 6, characterized in that: The rotating connecting member includes a bearing, and the bearing is fixedly sleeved on the large diameter section and connected to an assembly hole formed on the housing.

8. The fan device integrated with an axial flux motor according to claim 7, characterized in that: There are two bearings and a distance sleeve sleeved on the large diameter section is arranged between the two bearings.

9. A fan device integrated with an axial flux motor according to any one of claims 6 to 8, characterized in that: The end of the large diameter section away from the small diameter section is also connected to a compression nut which is placed outside the shell and limits the rotation connection member.

10. The fan device integrated with an axial flux motor according to claim 1, characterized in that: The housing comprises: A fan housing, wherein the fan housing has an air duct, and an impeller is arranged in one end of the air duct; The bearing seat is fixedly connected to one end of the fan housing close to the impeller, and the main shaft and the stator winding are both connected to the bearing seat.

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