Axial flow fan with protection function

Abstract

The invention discloses an axial flow fan with a protection function, and relates to the technical field of fans, the axial flow fan comprises a motor body, an impeller and a frame body, the frame body comprises a cylinder and a mounting disc arranged at one end of the cylinder, the motor body comprises a stator and an outer rotor, the impeller comprises a hub and an outer wheel, and the impeller is fixedly mounted on the outer rotor through the hub; the inner edge of the hub rotatably sleeves the outer edge of the stator, the end, away from the impeller, of the stator is fixedly connected with the mounting disc in a sealed mode, the inner edge of the hub of the impeller rotatably sleeves the outer edge of the stator, and air discharged by the impeller is directly and axially discharged along the outer edge of the hub, so that water or dust entering the stator from the end, away from the mounting disc, of the stator is reduced; the end, away from the impeller, of the stator is fixedly connected with the mounting disc in a sealed mode, in this way, water or dust entering the stator from the end, close to the mounting disc, of the stator is reduced, the protection effect of the fan is improved, and the service life of the fan is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of fans, and in particular to a protected axial flow fan. Background Art

[0002] As a common ventilation equipment, axial flow fans are widely used in industrial production, building ventilation and other fields. Traditional axial flow fans are mainly composed of motors, impellers and casings. The motor drives the impeller to rotate, sucking air or other gases from the air inlet and exhausting them through the air outlet to achieve the function of ventilation. In recent years, with the refinement of industrial production and technological advancement, the market has higher and higher performance requirements for axial flow fans, especially in terms of protection, durability and efficiency.

[0003] These protective measures in related technologies can only partially solve the problem, especially in high humidity or harsh environments, where moisture or dust can easily penetrate into the motor through the connection between the motor and the housing, causing the circuit board inside the motor to get damp or even short-circuit, seriously affecting the service life and reliability of the fan. Therefore, how to further improve the protective performance of axial flow fans has become a technical problem that needs to be solved urgently. Summary of the invention

[0004] In order to help improve the technical problem of the protection effect of the fan, the present application provides an axial flow fan with protection, which adopts the following technical solution: A protected axial flow fan comprises a motor body, an impeller and a frame, wherein the frame comprises a cylinder and a mounting plate arranged at one end of the cylinder, the motor body comprises a stator and an outer rotor, the impeller comprises a hub and an outer wheel, the impeller is fixedly mounted on the outer rotor via the hub, the inner edge of the hub is rotatably sleeved on the outer edge of the stator, and the end of the stator facing away from the impeller is sealed and fixedly connected to the mounting plate.

[0005] By adopting the above technical solution, the inner edge of the impeller hub is rotatably sleeved on the outer edge of the stator, and the wind discharged by the impeller is directly discharged axially along the outer edge of the hub, which helps to reduce the moisture or dust from the end of the stator away from the mounting disk to enter the interior of the stator. The end of the stator away from the impeller is sealed and fixed to the mounting disk, which helps to reduce the moisture or dust from the end of the stator close to the mounting disk to enter the interior of the stator, thereby improving the protection effect of the fan and further increasing the service life of the fan.

[0006] Optionally, a sealing groove is provided on the mounting plate, a sealing member is installed in the sealing groove, and the sealing member is tightly mounted against a side wall of the stator.

[0007] By adopting the above technical solution, a sealing groove is provided on the mounting plate to limit the installation position of the seal, and the seal is installed tightly against the side wall of the stator, so that a sealed connection is formed between the stator and the mounting plate, which helps to prevent moisture or dust from entering the interior of the stator.

[0008] Optionally, a plurality of screw through holes are provided on the sealing member, screw mounting holes corresponding to the plurality of screw through holes are provided on the mounting plate, and screw threads are provided on the side wall of the stator corresponding to the plurality of screw through holes.

[0009] By adopting the above technical solution, a plurality of screw through holes are provided on the seal, a screw mounting hole is provided on the mounting plate, and a screw thread hole is provided on the stator, so that screws are conveniently inserted to fix the stator. At the same time, the interior of the stator is sealed and isolated from the screw mounting holes and the screw thread holes through the screw through holes, which helps to improve the protective effect of the interior of the stator.

[0010] Optionally, the sealing member is further provided with a wire passing hole, the mounting plate is provided with a wire lead hole corresponding to the wire passing hole, a sealing plug is installed in the wire lead hole, the sealing plug is provided with a plurality of wire threading holes and a plurality of wiring grooves vertically arranged with the wire threading holes, the mounting plate is provided with a wire lead protection cover, the wire lead protection cover presses and seals the wires in the wiring grooves.

[0011] By adopting the above technical solution, a lead hole is provided on the mounting plate, a sealing plug is installed in the lead hole, a wire threading hole and a wiring groove are provided on the sealing plug, and the lead protection cover presses the wires in the sealed wiring groove, which helps to prevent moisture or dust from entering the stator along the wires, thereby improving the protection effect of the stator.

[0012] Optionally, the protective cover is provided with an elastic protrusion corresponding to the wiring groove, and the elastic protrusion presses against the wires in the wiring groove and the side walls of the wiring groove on both sides of the wires.

[0013] By adopting the above technical solution, an elastic protrusion corresponding to the wiring groove is provided on the protective cover, and the elastic protrusion presses against the wires and the side walls of the wiring groove on both sides of the wires, so that the wires are sealed and connected to the wiring groove, which helps to prevent moisture or dust from entering the stator through the wire threading hole from the wiring groove, and prevents the circuit board inside the stator from being damaged due to moisture.

[0014] Optionally, the motor body further comprises a rotating shaft, both ends of which are rotatably mounted in the stator via sealed bearings, and the outer rotor is fixedly mounted on one end of the rotating shaft away from the mounting plate.

[0015] By adopting the above technical solution, both ends of the rotating shaft are rotatably installed in the stator through sealed bearings, which helps to prevent moisture or dust from entering the interior of the stator through the rotating shaft and the sealed bearings, and helps to improve the protection effect of the interior of the stator.

[0016] Optionally, a cooling fan for blowing air toward the stator is provided at one end of the outer rotor close to the stator.

[0017] By adopting the above technical solution, the cooling fan is arranged at one end of the outer rotor close to the stator. When the outer rotor rotates, the cooling fan blows air to the stator to cool it down, which helps prevent the motor body from heating up during operation and causing excessive temperature, thereby increasing the service life of the fan.

[0018] Optionally, a mounting groove is provided at one end of the cylinder away from the mounting plate, a guide ring is installed in the mounting groove, a leeward groove is formed between the guide ring and the inner wall of the cylinder, and the outer wheel is rotatably arranged in the leeward groove at one end close to the guide ring.

[0019] By adopting the above technical solution, a mounting groove is provided at one end of the cylinder away from the mounting plate, and a guide ring is installed in the mounting groove so that the guide ring and the frame are integrated, which helps to reduce the installation space; the end of the outer wheel close to the guide ring is rotatably set in the leeward groove, which helps the wind entering from the guide ring to be discharged directly through the blades, reducing the wind pressure leakage from between the outer wheel and the inner wall of the cylinder, thereby improving the efficiency of the fan.

[0020] Optionally, a plurality of evenly distributed guide plates are provided between the cylinder and the mounting plate, one end of the guide plate is fixedly connected to the inner wall of the cylinder, and the other end is fixedly connected to the outer edge of the mounting plate, and the guide plate is arranged in a curved surface along the length direction.

[0021] By adopting the above technical solution, a plurality of evenly distributed guide plates are provided between the cylinder and the mounting plate, which helps to improve the strength of the mounting plate for installing the impeller. The guide plates are arranged in a curved surface along the length direction, which helps to reduce wind resistance and improve the efficiency of the fan.

[0022] Optionally, the windward surface of the guide plate is arranged in an arc shape, and the leeward surface of the guide plate is arranged in a serrated shape.

[0023] By adopting the above technical solution, the windward side of the guide plate is set in an arc shape, and the leeward side of the guide plate is set in a serrated shape, which helps to reduce the resistance to exhaust air and thus reduce the noise during the operation of the fan.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. The inner edge of the impeller hub is rotatably sleeved on the outer edge of the stator, and the end of the stator away from the impeller is sealed and fixed to the mounting plate, which helps to reduce the entry of moisture or dust from the end of the stator close to the mounting plate into the interior of the stator, thereby improving the protection effect of the fan and further increasing the service life of the fan; 2. A sealing groove is provided on the mounting plate to define the installation position of the seal. The seal is installed tightly against the side wall of the stator, so that a sealed connection is formed between the stator and the mounting plate, which helps prevent moisture or dust from entering the interior of the stator; 3. Through the screw through-hole setting on the seal, the inside of the stator is sealed and isolated from the screw installation hole and the screw thread hole, which helps to improve the protection effect inside the stator; 4. The threading holes and wiring grooves are set through the sealing plug to facilitate the threading of wires. The wires in the sealed wiring grooves are compressed by the protective cover to help prevent moisture or dust from entering the stator along the wires, thereby improving the protection effect of the stator; 5. The protective cover is provided with an elastic protrusion corresponding to the wiring groove. The elastic protrusion presses against the wires and the side walls of the wiring groove on both sides of the wires, so that the wires are sealed and connected with the wiring groove, which helps to prevent moisture or dust from entering the stator through the threading hole from the wiring groove, and prevents the circuit board inside the stator from being damaged due to moisture; 6. Both ends of the shaft are rotatably mounted in the stator through sealed bearings, which helps prevent moisture or dust from entering the stator through the shaft and sealed bearings, and helps improve the protection effect of the stator interior; 7. The cooling fan is set at one end of the outer rotor close to the stator. When the outer rotor rotates, the cooling fan blows air to the stator to cool it down, which helps prevent the motor body from overheating during operation, thereby increasing the service life of the fan; 8. The end of the outer wheel close to the guide ring is rotated and set in the leeward groove, which helps the wind entering from the guide ring to be discharged directly through the blades, reducing the wind pressure leakage between the outer wheel and the inner wall of the cylinder, thereby improving the efficiency of the fan; 9. Multiple evenly distributed guide plates are provided between the cylinder and the mounting plate, which helps to improve the strength of the mounting plate to install the impeller. The guide plates are arranged in a curved surface along the length direction, which helps to reduce wind resistance and improve the efficiency of the fan; 10. The windward side of the guide plate is set in an arc shape, and the leeward side of the guide plate is set in a serrated shape, which helps to reduce the resistance to exhaust air and thus reduce the noise during the operation of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of a protected axial flow fan disclosed in this application.

[0026] Figure 2 This is a cross-sectional view of a protected axial flow fan disclosed in the present application.

[0027] Figure 3 It is a schematic diagram of the structure of the frame disclosed in this application.

[0028] Figure 4 This is a schematic diagram of the structure of the seal disclosed in this application.

[0029] Figure 5 This is a schematic diagram of the structure of the stator disclosed in this application.

[0030] Figure 6 This is a schematic diagram of the structure of the sealing plug disclosed in this application.

[0031] Figure 7 This is a schematic diagram of the structure of the protective cover disclosed in this application.

[0032] Description of reference numerals: 1. Motor body; 11. Stator; 111. Screw thread hole; 12. Outer rotor; 121. Cooling fan; 13. Rotating shaft; 14. Sealed bearing; 2. Impeller; 21. Hub; 22. Outer wheel; 23. Blade; 3. Frame; 31. Cylinder; 311. Mounting slot; 312. Leeward slot; 32. Mounting plate; 321. Sealing slot; 322. Screw mounting hole; 323. Lead hole; 33. Guide plate; 331. Windward side; 332. Leeward side; 4. Seal; 41. Screw through hole; 42. Wire through hole; 5. Sealing plug; 51. Threading hole; 52. Wiring slot; 6. Protective cover; 61. Elastic protrusion; 7. Guide ring. DETAILED DESCRIPTION

[0033] The following combination Figures 1 to 7 This application is described in further detail.

[0034] The embodiment of the present application discloses a protected axial flow fan.

[0035] A protected axial flow fan. Figure 1 and Figure 2, including a motor body 1, an impeller 2 and a frame 3, the frame 3 including a barrel 31 and a mounting plate 32 arranged at one end of the barrel 31, the motor body 1 including a stator 11, an outer rotor 12, a rotating shaft 13 and two sealed bearings 14, the rotating shaft 13 is rotatably supported in the inner hole of the stator 11 through the two sealed bearings 14, the outer rotor 12 is fixedly mounted at one end of the rotating shaft 13, the impeller 2 includes a hub 21, an outer wheel 22 and a plurality of blades 23, the plurality of blades 23 are evenly distributed between the hub 21 and the outer wheel 22, the impeller 2 is fixedly mounted on the outer rotor 12 through the hub 21, and the inner edge of the hub 21 is rotatably sleeved on the outer wheel 22. On the outer edge of the stator 11, one end of the stator 11 away from the impeller 2 is sealed and fixedly connected to the mounting disk 32, and the inner edge of the hub 21 of the impeller 2 is rotatably sleeved on the outer edge of the stator 11. The wind discharged by the impeller 2 is directly discharged axially along the outer edge of the hub 21, which helps to reduce the moisture or dust from the end of the stator 11 away from the mounting disk 32. The end of the stator 11 away from the impeller 2 is sealed and fixedly connected to the mounting disk 32. In this way, it helps to reduce the moisture or dust from the end of the stator 11 close to the mounting disk 32. Entering into the interior of the stator 11, thereby improving the protection effect of the fan and further increasing the service life of the fan.

[0036] Reference Figures 3 to 5 The mounting plate 32 is provided with a sealing groove 321, in which a sealing member 4 is installed. The sealing member 4 is tightly mounted against the side wall of the stator 11. The mounting plate 32 is provided with a sealing groove 321, thereby defining the mounting position of the sealing member 4. The sealing member 4 is tightly mounted against the side wall of the stator 11, thereby forming a sealed connection between the stator 11 and the mounting plate 32, which helps to prevent moisture or dust from entering the interior of the stator 11. The sealing member 4 is provided with a plurality of screw holes 41, and the mounting plate 32 is provided with a plurality of screw holes 41. Corresponding screw mounting holes 322, screw holes 111 are arranged on the side wall of the stator 11 corresponding to the multiple screw through holes 41, the seal 4 is provided with multiple screw through holes 41, the mounting plate 32 is provided with screw mounting holes 322, and the stator 11 is provided with screw holes 111, which are convenient for threading screws to fix the stator 11. At the same time, the interior of the stator 11 is sealed and isolated from the screw mounting holes 322 and the screw holes 111 through the screw through holes 41, which helps to improve the protection effect of the interior of the stator 11.

[0037] Reference Figure 3 , Figures 5 to 7, the sealing member 4 is also provided with a wire hole 42, a lead hole 323 is provided on the mounting plate 32 corresponding to the wire hole 42, a sealing plug 5 is installed in the lead hole 323, a plurality of threading holes 51 and a plurality of wiring grooves 52 arranged perpendicularly to the threading holes 51 are provided on the sealing plug 5, and a lead protection cover 6 is provided on the mounting plate 32, and the lead protection cover 6 presses the wires in the sealed wiring groove 52; a lead hole 323 is provided on the mounting plate 32, a sealing plug 5 is installed in the lead hole 323, a threading hole 51 and a wiring groove 52 are provided on the sealing plug 5, and the lead protection cover 6 presses the wires in the sealed wiring groove 52, which helps to prevent moisture or dust from passing along The wires enter the interior of the stator 11, thereby improving the protection effect of the stator 11; the protective cover 6 is provided with an elastic protrusion 61 corresponding to the wiring groove 52, and the elastic protrusion 61 presses and abuts the wires in the wiring groove 52 and the side walls of the wiring groove 52 on both sides of the wires. The protective cover 6 is provided with an elastic protrusion 61 corresponding to the wiring groove 52, and the elastic protrusion 61 presses and abuts the wires and the side walls of the wiring groove 52 on both sides of the wires, so that the wires are sealed and connected to the wiring groove 52, which helps to prevent moisture or dust from entering the interior of the stator 11 from the wiring groove 52 through the threading hole 51, and prevents the circuit board inside the stator 11 from being damaged due to moisture.

[0038] Reference Figure 2 The motor body 1 also includes a rotating shaft 13, both ends of the rotating shaft 13 are rotatably mounted in the stator 11 through sealed bearings 14, and the outer rotor 12 is fixedly mounted on one end of the rotating shaft 13 away from the mounting plate 32; both ends of the rotating shaft 13 are rotatably mounted in the stator 11 through sealed bearings 14, which helps to prevent moisture or dust from entering the interior of the stator 11 through the rotating shaft 13 and the sealed bearings 14, and helps to improve the protection effect of the interior of the stator 11.

[0039] Reference Figure 2 A cooling fan 121 that blows air toward the stator 11 is provided at one end of the outer rotor 12 close to the stator 11; the cooling fan 121 is arranged at one end of the outer rotor 12 close to the stator 11. When the outer rotor 12 rotates, the cooling fan 121 blows air toward the stator 11 to cool it down, which helps prevent the motor body 1 from heating up during operation and causing the temperature to be too high, thereby increasing the service life of the fan.

[0040] Reference Figure 2 and Figure 3A mounting groove 311 is provided at one end of the cylinder 31 away from the mounting plate 32, and a guide ring 7 is installed in the mounting groove 311, and a leeward groove 312 is formed between the guide ring 7 and the inner wall of the cylinder 31, and an end of the outer wheel 22 close to the guide ring 7 is rotatably arranged in the leeward groove 312; a mounting groove 311 is provided at one end of the cylinder 31 away from the mounting plate 32, and a guide ring 7 is installed in the mounting groove 311, so that the guide ring 7 and the frame 3 are integrated, which helps to reduce the installation space, and an end of the outer wheel 22 close to the guide ring 7 is rotatably arranged in the leeward groove 312, which helps the wind entering from the guide ring 7 to be directly discharged through the blades 23, thereby reducing the wind pressure leakage between the outer wheel 22 and the inner wall of the cylinder 31, thereby improving the efficiency of the fan.

[0041] Reference Figure 3 A plurality of evenly distributed guide plates 33 are provided between the cylinder 31 and the mounting plate 32. It should be noted that the number of guide plates 33 in the embodiment of the present application is 11, and the number of guide plates 33 in other embodiments of the present application is 6 to 10. The number of guide plates 33 can support the mounting plate 32 and the components mounted thereon and the wind resistance. The present application does not limit the number of guide plates 33. One end of the guide plate 33 is fixedly connected to the inner wall of the cylinder 31, and the other end is fixedly connected to the outer edge of the mounting plate 32. The guide plate 33 is arranged in a curved surface along the length direction; A plurality of evenly distributed guide plates 33 are provided between the cylinder 31 and the mounting plate 32, which help to improve the strength of the mounting plate 32 for mounting the impeller 2. The guide plates 33 are arranged in a curved surface along the length direction, which help to reduce wind resistance and improve the efficiency of the fan; the windward surface 331 of the guide plate 33 is arranged in an arc shape, and the leeward surface 332 of the guide plate 33 is arranged in a serrated shape; the windward surface 331 of the guide plate 33 is arranged in an arc shape, and the leeward surface 332 of the guide plate 33 is arranged in a serrated shape, which help to reduce the resistance to exhaust air, thereby reducing the noise during the operation of the fan.

[0042] The assembly process of a protected axial flow fan is as follows: a rotating shaft 13 and two sealed bearings 14 are installed in the inner hole of a stator 11, a cooling fan 121 is pre-installed in an outer rotor 12, the outer rotor 12 is installed on the rotating shaft 13, an impeller 2 is pressed onto the outer circumference of the outer rotor 12, a seal 4 is installed in a sealing groove 321 of a frame 3, the stator 11 and the parts assembled on the stator 11 are inserted into a cylinder 31, fixed on a mounting plate 32 by screws and the seal 4 is pressed, the wires in the stator 11 are passed through a wire hole 42 and a wire threading hole 51 of a sealing plug 5, the sealing plug 5 is inserted into the wire hole 42, the wires are respectively placed in wiring grooves 52, a protective cover 6 is installed on the mounting plate 32 so that the elastic protrusion 61 presses the wires and the inner wall of the wiring groove 52, and a guide ring 7 is installed in the mounting groove 311 of the cylinder 31.

[0043] The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application in sequence. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A protected axial flow fan, comprising a motor body (1), an impeller (2) and a frame (3), characterized in that: The frame (3) comprises a cylinder (31) and a mounting plate (32) arranged at one end of the cylinder (31); the motor body (1) comprises a stator (11) and an outer rotor (12); the impeller (2) comprises a hub (21) and an outer wheel (22); the impeller (2) is fixedly mounted on the outer rotor (12) via the hub (21); the inner edge of the hub (21) is rotatably sleeved on the outer edge of the stator (11); and one end of the stator (11) facing away from the impeller (2) is sealed and fixedly connected to the mounting plate (32).

2. The axial flow fan with protection according to claim 1, characterized in that: The mounting plate (32) is provided with a sealing groove (321), a sealing member (4) is installed in the sealing groove (321), and the sealing member (4) is tightly mounted against the side wall of the stator (11).

3. A protected axial flow fan according to claim 2, characterized in that: The sealing member (4) is provided with a plurality of screw through holes (41), the mounting plate (32) is provided with screw mounting holes (322) corresponding to the plurality of screw through holes (41), and the side wall of the stator (11) is provided with screw thread holes (111) corresponding to the plurality of screw through holes (41).

4. The protected axial flow fan according to claim 2, characterized in that: The sealing member (4) is also provided with a wire hole (42), the mounting plate (32) is provided with a lead-in hole (323) corresponding to the wire hole (42), a sealing plug (5) is installed in the lead-in hole (323), the sealing plug (5) is provided with a plurality of wire holes (51) and a plurality of wiring grooves (52) vertically arranged with respect to the wire holes (51), the mounting plate (32) is provided with a lead-in protective cover (6), the lead-in protective cover (6) compresses and seals the wires in the wiring grooves (52).

5. The protected axial flow fan according to claim 4, characterized in that: The protective cover (6) is provided with an elastic protrusion (61) corresponding to the wiring groove (52), and the elastic protrusion (61) is pressed against the wires in the wiring groove (52) and the side walls of the wiring groove (52) on both sides of the wires.

6. The protected axial flow fan according to claim 1, characterized in that: The motor body (1) further comprises a rotating shaft (13), both ends of the rotating shaft (13) being rotatably mounted in the stator (11) via sealed bearings (14), and one end of the rotating shaft (13) away from the mounting plate (32) being fixedly mounted with the outer rotor (12).

7. The protected axial flow fan according to claim 6, characterized in that: A cooling fan (121) for discharging air toward the stator (11) is provided at one end of the outer rotor (12) close to the stator (11).

8. The protected axial flow fan according to claim 1, characterized in that: An installation groove (311) is provided at one end of the cylinder (31) away from the installation plate (32), a guide ring (7) is installed in the installation groove (311), a leeward groove (312) is formed between the guide ring (7) and the inner wall of the cylinder (31), and an end of the outer wheel (22) close to the guide ring (7) is rotatably arranged in the leeward groove (312).

9. The protected axial flow fan according to claim 8, characterized in that: A plurality of evenly distributed guide plates (33) are provided between the cylinder (31) and the mounting plate (32); one end of the guide plate (33) is fixedly connected to the inner wall of the cylinder (31), and the other end is fixedly connected to the outer edge of the mounting plate (32); and the guide plate (33) is arranged in a curved surface along the length direction.

10. The protected axial flow fan according to claim 9, characterized in that: The windward surface (331) of the guide plate (33) is arranged in an arc shape, and the leeward surface (332) of the guide plate (33) is arranged in a sawtooth shape.

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