Fan structure

Abstract

The application relates to a fan structure, which comprises a shell, a driving assembly arranged in the shell, a rotatable moving impeller arranged at one end of the driving assembly, an air inlet arranged on the shell and corresponding to the position of the moving impeller, an air outlet arranged on the shell and close to the driving assembly, a fixed impeller arranged on the side of the moving impeller away from the air inlet, and a sealing connection between the fixed impeller and the driving assembly, wherein the air inlet, the moving impeller, the fixed impeller and the air outlet form an air flow channel. The fan structure is simple in structure, good in sealing performance and long in service life.

Description

Technical Field

[0001] This invention relates to the field of wind turbine technology, and in particular to a wind turbine structure. Background Technology

[0002] Current market-ready fan structures typically consist of two air ducts: a main air duct and a cooling air duct. When used in humid conditions, both air ducts need to be sealed and waterproofed. Therefore, a corresponding sealing structure throughout the entire unit is required to prevent moisture from entering the motor. Because there are many areas requiring sealing, and the overall sealing design requirements are relatively high, the sealing structure is complex. Furthermore, prolonged use can lead to seal failure, ultimately causing water to enter the fan, damaging it, and shortening its lifespan. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to provide a fan structure that is simple in structure, has good airtightness, and has a long service life.

[0004] To solve the above-mentioned technical problems, the present invention provides a fan structure, including: a housing, a drive assembly inside the housing, a rotatable impeller at one end of the drive assembly, an air inlet on the housing corresponding to the position of the impeller, an air outlet on the housing near the drive assembly, a fixed impeller on the side of the impeller away from the air inlet, the fixed impeller being sealed to the drive assembly, and the air inlet, the impeller, the fixed impeller, and the air outlet forming an airflow channel.

[0005] In one embodiment of the present invention, the housing includes a first outer shell and a second outer shell, the first outer shell and the second outer shell are sealed together, the second outer shell has an air outlet on its side wall, and the air outlet is provided with a first partition that separates the air outlet.

[0006] In one embodiment of the present invention, the fan structure further includes a controller located near the inner wall of the first housing, a heat-conducting pad is provided between the controller and the inner wall of the first housing, and the controller is electrically connected to the drive assembly.

[0007] In one embodiment of the present invention, the housing further includes a fan shroud, which is hermetically connected to the second outer shell. The fan shroud has an air inlet, and a sealing ring is provided on the inner wall around the air inlet. The end of the moving impeller near the air inlet is connected to the sealing ring.

[0008] In one embodiment of the present invention, the drive assembly includes a rotor, and a sealing element is provided at the connection position between the rotor shaft and the fixed impeller. The sealing element is sleeved on the rotor shaft, and the outer wall of the sealing element contacts the fixed impeller. The sealing element includes a flexible connecting element, one end of the connecting element is provided with a base plate, the base plate is provided with a skeleton extending into the connecting element, and one end of the connecting element is also provided with a flexible gasket.

[0009] In one embodiment of the present invention, the connection position between the rotating shaft and the moving impeller is connected to a first bushing by riveting. The first bushing is provided with a first protrusion. The moving impeller is connected to the first bushing by riveting, and the first protrusion is stuck on the moving impeller.

[0010] In one embodiment of the present invention, the drive assembly further includes a stator, the rotor is located inside the stator, the stator is annular and includes a magnetic core, a baffle is connected to the inner wall of the magnetic core, a metal wire is wound between the baffle and the inner wall of the magnetic core, and a second protrusion is provided on the outer wall of the magnetic core.

[0011] In one embodiment of the present invention, one end of the stator is provided with an end cover, and the side wall of the end cover is provided with an inward first groove, and the second protrusion is engaged in the first groove.

[0012] In one embodiment of the present invention, the end cap is provided with a countersunk hole, a second bearing is provided in the countersunk hole, the rotating shaft is connected to the second bearing, and a wave washer is provided at the position where the second bearing fits against the bottom of the countersunk hole.

[0013] In one embodiment of the present invention, the first housing has a first opening at the position corresponding to the controller, and the wires and connectors on the controller extend outward through the first opening. The sidewalls of the wires, the sidewalls of the connectors, and the inner wall of the first opening are sealed by potting adhesive.

[0014] The technical solution of the present invention has the following advantages compared with the prior art:

[0015] The fan structure described in this invention prevents moisture from entering the fan through gaps in the casing by using potting compound, sealing components, and sealing rings. By placing the air inlet near the drive assembly and installing a first baffle at the air inlet, the heat absorbed by the baffle can be carried away by the circulating air, giving the air duct both heat dissipation and air outlet effects. This eliminates the need for a separate heat dissipation duct, simplifies the sealing mechanism, and extends the service life. The use of thermal grease and a thermal pad, along with the aluminum alloy casing, facilitates heat dissipation through the outer shell. Attached Figure Description

[0016] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0017] Figure 1 This is a schematic diagram of a first embodiment of the fan structure of the present invention;

[0018] Figure 2 yes Figure 1 A longitudinal sectional view;

[0019] Figure 3 yes Figure 1 Internal structure diagram;

[0020] Figure 4 yes Figure 3 Schematic diagram of the middle stator structure;

[0021] Figure 5 yes Figure 3 Schematic diagram of the middle end cap structure;

[0022] Figure 6 yes Figure 3 Schematic diagram of the rotor structure;

[0023] Figure 7 yes Figure 1 Schematic diagram of the second outer shell structure;

[0024] Figure 8 yes Figure 3 Schematic diagram of the central impeller structure;

[0025] Figure 9 This is a schematic diagram of a second embodiment of the fan structure of the present invention;

[0026] Figure 10 yes Figure 9 A longitudinal sectional view;

[0027] Figure 11 yes Figure 10 Enlarged view of a portion of point A in the middle;

[0028] Figure 12 yes Figure 10 Schematic diagram of the central impeller structure.

[0029] Explanation of reference numerals in the accompanying drawings: 1. Housing; 2. Stator; 3. Rotor; 4. Stator impeller; 5. Moving impeller; 6. Controller; 7. End cover; 11. Second housing; 12. Fan shroud; 13. First housing; 21. Magnetic core; 22. Metal wire; 23. Baffle; 24. Third slot; 25. Insert / pull-out component; 31. Wave washer; 32. Shaft; 33. First bearing; 34. Balance ring; 35. Magnet ring; 36. Second bearing; 37. Seal; 38. Thread; 41. Second bushing; 42. Fifth threaded hole; 43. Fourth slot; 44. First fan blade; 45. Third partition; 51. Upper pressure ring; 52. Second fan blade; 53. First bushing; 54. First protrusion; 55. Thread 61. Cap; 62. Wire; 63. Connector; 64. Power device; 71. Thermal pad; 72. First slot; 73. Third groove; 74. First threaded hole; 75. Connecting block; 76. Second threaded hole; 111. Air outlet; 112. First partition; 113. Third protrusion; 114. Third threaded hole; 115. Fourth threaded hole; 121. Second partition; 122. Sealing ring; 123. Air inlet; 131. Second slot; 132. Second opening; 133. First opening; 134. Pressure block; 135. First groove; 211. Second protrusion; 212. Second groove; 371. Connector; 372. Frame; 373. Gasket; 374. Cavity; 375. Base plate. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0031] Reference Figure 9 and Figure 10 As shown, a fan structure of the present invention includes: a housing 1, a drive assembly inside the housing 1, a rotatable impeller 5 at one end of the drive assembly, an air inlet 123 on the housing 1 corresponding to the position of the impeller 5, an air outlet 111 on the housing 1 near the drive assembly, a fixed impeller 4 on the side of the impeller 5 away from the air inlet 123, the fixed impeller 4 being sealed to the drive assembly, and the air inlet 123, the impeller 5, the fixed impeller 4, and the air outlet 111 forming an airflow channel.

[0032] Example 1

[0033] Reference Figure 1 and Figure 2As shown, the first outer casing 13 is generally circular and located at the top of the fan. A second, quadrilateral-shaped, upward-protruding slot 131 is located at the center of the first outer casing 13. A controller 6 is threadedly connected to the lower side of the first outer casing 13 via screws. Two second openings 132 are located on the outer edge of the first outer casing 13. Corresponding to the two second openings 132, wires 61 and connection ports 62 are respectively located on the upper side of the controller 6. A microcontroller unit and a power device 63 are also located on the upper side of the controller 6. The power device 63 is specifically a metal-oxide-semiconductor field-effect transistor. A capacitor is located on the lower side of the controller 6. A pressure block 134 is snap-fitted to the lower side of the first outer casing 13, maintaining a certain distance between the controller 6 and the first outer casing 13, thus preventing damage to the electronic components on the controller 6 when the first outer casing 13 is connected to the controller 6. A fan shroud 12 is located at the bottom of the fan, with a circular air inlet 123 at its bottom. A second outer casing 11 is connected to the upper side of the fan shroud 12 via a staggered snap-fit. The connection between the second outer casing 11 and the fan shroud 12 is secured with adhesive. The inner wall of the second outer casing 11 is provided with an upward-facing air outlet 111. The top of the second outer casing 11 is located in the middle of the fan, and multiple arc-shaped first partitions 112 are longitudinally arranged inside the air outlet 111. The bottom outer side of the second outer casing 11 is provided with third threaded holes 114 and fourth threaded holes 115 at equal intervals, and a third protrusion 113 is provided in the middle of the bottom outer side of the second outer casing 11, and a through hole is provided in the middle of the third protrusion 113.

[0034] Reference Figure 3 and 4 As shown, the stator 2 is generally annular and includes a magnetic core 21. A baffle 23, which is arc-shaped, is fixedly connected to the inner wall of the magnetic core 21. A metal wire 22, specifically a copper wire, is wound longitudinally between the baffle 23 and the inner wall of the stator 2. Three second protrusions 211 are evenly spaced on the outer wall of the magnetic core 21, and a second groove 212 is longitudinally located in the middle of each second protrusion 211. Three upwardly protruding third slots 24 are evenly spaced on the upper edge of the outer wall of the magnetic core 21. Each third slot 24 contains a plug-in component 25, the top of which is inserted into the corresponding interface of the controller 6, thus electrically connecting the stator 2 and the controller 6. The plug-in components 25 are engaged in the third slots 24 and are connected to each other by wires 61.

[0035] Reference Figure 3 and Figure 5As shown, the end cover 7 is triangular in shape, and each corner of the upper side of the end cover 7 is provided with a third groove 72. Each third groove 72 has a first threaded hole 73 at its bottom. A screw passes through the first threaded hole 73 from the upper side and then passes through the second groove 212 and the third threaded hole 114 in sequence, so that the end cover 7, the stator 2, and the second housing 11 are relatively fixed. Each third groove 72 has a cylindrical connecting block 74 on its outer side. The connecting block 74 extends upward and has a second threaded hole 75 at its upper end. A screw passes through the first housing 13 from the upper side and then passes through the first housing 13, the pressure block 134, the controller 6, and the second threaded hole 75 in sequence, so that the first housing 13, the pressure block 134, the controller 6, and the end cover 7 are relatively fixed. The lower side of the third groove 72 is provided with an inward first slot 71. The first slot 71 is arranged longitudinally. The second protrusion 211 on the stator 2 is engaged in the first slot 71, so that the end cover 7 limits the position of the stator 2. A countersunk hole is provided in the middle of the end cap 7.

[0036] Reference Figure 6 As shown, the rotor 3 includes a shaft 32, with a second bearing 36 connected to the upper end of the shaft 32. From top to bottom, a magnet ring 35, a balance ring 34, and a first bearing 33 are sequentially connected in the middle position. The outer wall of the bottom end of the shaft 32 has a thread 38. The second bearing 36 is located in a countersunk hole, limiting the upper end of the shaft 32. A wave washer 31 is provided at the top of the second bearing 36 to reduce noise. The magnet ring 35 and the balance ring 34 are located inside the stator 2. When the stator 2 is energized, the magnetic core 21 generates a change in the magnetic field through copper wires, causing the magnet ring 35 to drive the shaft 32 to rotate. The balance ring 34 is mainly used to balance the radial force of the shaft 32. The first bearing 33 is located at the bottom of the second housing 11, and is sealed to the inner wall of the second housing 11 with adhesive. A second bushing 41 is provided on the lower side of the first bearing 33.

[0037] Reference Figure 8 As shown, the fixed impeller 4 is cylindrical in shape, with arc-shaped first blades 44 evenly spaced on its outer wall. A fourth slot 43 is located in the middle of the fixed impeller 4, and a third protrusion 113 on the bottom of the second housing 11 is engaged in the fourth slot 43, limiting the position of the fixed impeller 4. Three fifth threaded holes 42 are evenly spaced beside the fourth slot 43. A screw passes through the fifth threaded holes 42 from the underside of the fixed impeller 4 and then through the fourth threaded hole 115, fixing the fixed impeller 4 relative to the second housing 11. The fixed impeller 4 serves to guide airflow.

[0038] Reference Figure 3As shown, the upper side of the moving impeller 5 contacts the bottom of the second bushing 41, and the lower side is provided with arc-shaped second fan blades 52 at equal intervals. A rotating shaft 32 passes through the middle of the lower side, and the thread 38 at the bottom end of the rotating shaft 32 is connected to the nut 55. The bottom end of the nut 55 is sealed with glue, and an upper pressure ring 51 is provided between the nut 55 and the lower side of the moving impeller 5, so that the rotating shaft 32 can drive the moving impeller 5 to rotate. A sealing ring 122 is provided around the air outlet 111 at the bottom of the second housing 11. A second partition 121 is connected to the upper side of the sealing ring 122. The outer wall of the second partition 121 is arc-shaped, and the middle is connected to the air inlet 123.

[0039] In use, the external power supply device supplies power to the fan through the wire 61, and the external control device is connected to the controller 6 through the connection port 62. After the external control device transmits a signal to the microcontroller unit on the controller 6, the microcontroller unit controls the on and off of the metal-oxide-semiconductor field-effect transistor, and then controls the magnetic core 21. The magnetic core 21 generates a change in the magnetic field through the copper wire, which causes the magnetic steel ring 35 to drive the rotating shaft 32 to rotate. After the rotating shaft 32 rotates, it drives the moving impeller 5 to rotate. The moving impeller 5 draws in air from the air inlet 123, passes through the fixed impeller 4, and is sprayed out from the air outlet 111.

[0040] This embodiment is suitable for dry environments. The detachable connection between the rotor 3 and the impeller 5 facilitates disassembly and maintenance. The housing 1 does not completely cover the internal parts, which makes the heat dissipation effect of this embodiment better.

[0041] Example 2

[0042] Reference Figure 9 , Figure 10 and Figure 12As shown, the first outer shell 13 is cylindrical and is connected to the second outer shell 11 by a staggered snap-fit, with the connection sealed with glue. A controller 6 is located on the inner wall of the top of the first outer shell 13, and a first opening 133 is located at the top of the first outer shell 13. A wire 61 and a connector 62 extend outward from the first opening 133 on the upper side of the controller 6. The sidewalls of the wire 61, the sidewall of the connector 62, and the inner wall of the first opening 133 are sealed with potting compound to prevent external moisture from directly contacting the controller 6 through the first opening 133. A microcontroller unit and a power device 63 are also located on the upper side of the controller 6. The power device 63 is specifically a metal-oxide-semiconductor field-effect transistor (MOSFET). A capacitor is located on the lower side of the controller 6. A first groove 135 is located around the first opening 133, corresponding to the position of the power device 63. The first groove 135 is annular, and a thermal pad 64, specifically a silicone pad, is located between the bottom of the first groove 135 and the power device 63. The thermal pad 64 facilitates heat dissipation from the power device 63 through the shell 1. The lower end of the second outer casing 11 is connected to the stator impeller 4 by screws. The stator impeller 4 has a third baffle 45 parallel to its outer wall. The first arc-shaped blade 44 of the stator impeller 4 is located between the third baffle 45 and the outer wall of the stator impeller 4. The outer wall of the stator impeller 4 is connected to the outer wall of the second outer casing 11 by a staggered snap-fit ​​connection. The lower end of the stator impeller 4 is connected to the fan shroud 12, and the connection is sealed with glue. Thermal grease is applied to the entire inner side of the casing 1 and the magnetic core 21 of the stator 2. The casing 1 is made of aluminum alloy, making it easier for heat inside the fan to dissipate outwards.

[0043] Reference Figure 11 As shown, the first bearing 33 on the rotor 3 is located at the bottom of the second housing 11, and a seal is provided on the lower side of the first bearing 33. The rotating shaft 32 passes through the seal 37. The seal 37 includes a flexible connector 371, which is cylindrical in shape and protrudes from the bottom. The connector 371 is made of flexible rubber. A base plate 375 is provided at the upper end of the connector 371, and a skeleton 372 extends downward into the connector 371 on the base plate 375. The bottom end of the skeleton 372 is arc-shaped. A gasket 373 is provided at the position where the bottom of the connector 371 contacts the rotating shaft 32. The gasket 373 is made of flexible PTFE gasket 373. A cavity 374 is also provided inside the connector 371, and grease for lubrication is provided in the cavity 374. Because the connector 371 is made of flexible rubber, the connector 371 and the second housing 11 have good sealing performance.

[0044] Reference Figure 10As shown, a first bushing 53 is riveted to the lower end of the rotating shaft 32. A first protrusion 54 is provided on the upper side of the first bushing 53. The moving impeller 5 is connected to the first bushing 53 by riveting, and the first protrusion 54 is stuck on the moving impeller 5, limiting its position. In this embodiment, the moving impeller 5 and the second partition 121 in Embodiment 1 are combined into one component, which has better waterproof performance. This ensures that there is no channel connecting the air duct formed between the air inlet 123 and the air outlet 111 to the inside of the fan, achieving complete waterproofing. In addition, the connection method and working process of other components in this embodiment are the same as in Embodiment 1, and will not be described again.

[0045] This embodiment is applicable in both dry and humid environments. The housing 1 covers the internal parts, and the central rotor 3...

[0046] The riveting connection between the rotor 3 and the impeller 5 improves the sealing effect between the rotor 3 and the impeller 5, prevents water vapor 5 from entering the interior, and ensures the concentricity of the shaft 32 and the seal.

[0047] The present invention provides a fan structure that prevents moisture from entering the fan interior through gaps in the housing 1 by using potting compound, sealing element 37, and adhesive sealing. By providing a first baffle 112 at the air inlet 123, the heat absorbed by the baffle can be carried away by the circulating air, thus enabling the air duct to simultaneously dissipate heat and exhaust moisture.

[0048] The fan's performance is enhanced by the use of thermal grease and a thermal pad 64, and by the aluminum alloy casing 1, allowing heat to dissipate more easily through the outer shell. The fan's power can be adjusted by changing the height of the magnetic core 21.

[0049] Currently, most common fans on the market use the housing 1 for axial positioning. If the height of the magnetic core 21 needs to be adjusted, the housing 1 must be changed. However, the fan structure of the present invention uses the stator 2 and the end cover 7 for axial positioning, without changing the housing 1. Therefore, the power of the fan can be adjusted by replacing different magnetic cores 21, making the power coverage of the fan wider and the adaptability stronger.

[0050] 5. Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A fan structure, characterized in that, The device includes: a housing, inside which a drive assembly is provided. One end of the drive assembly has a rotatable impeller. An air inlet is provided on the housing corresponding to the position of the impeller, and an air outlet is provided on the housing near the drive assembly. A fixed impeller is provided on the side of the impeller away from the air inlet. The fixed impeller is sealed to the drive assembly. The air inlet, impeller, fixed impeller, and air outlet form an airflow channel. The drive assembly includes a rotor. A sealing element is provided at the connection position between the rotor shaft and the fixed impeller. The sealing element is sleeved on the rotor shaft, and its outer wall contacts the fixed impeller. The sealing element includes an elastically deformable connector. The connector is cylindrical in shape and protrudes from the bottom. A base plate is provided at the upper end of the connector. A skeleton extending downward into the connector is provided on the base plate. An elastically deformable gasket is also provided at the bottom of the connector where it contacts the rotor shaft. A cavity is also provided inside the connector, and grease is provided in the cavity.

2. The fan structure according to claim 1, characterized in that: The housing includes a first outer shell and a second outer shell, the first outer shell and the second outer shell are sealed together, the second outer shell has an air outlet on its side wall, and the air outlet has a first partition that separates the air outlet.

3. The fan structure according to claim 2, characterized in that: The fan structure also includes a controller, which is located near the inner wall of the first housing. A heat-conducting pad is provided between the controller and the inner wall of the first housing, and the controller is electrically connected to the drive assembly.

4. The fan structure according to claim 2, characterized in that: The housing also includes a fan shroud, which is sealed to the second outer shell. The fan shroud has an air inlet, and the inner wall around the air inlet is provided with a sealing ring. The end of the moving impeller near the air inlet is connected to the sealing ring.

5. The fan structure according to claim 1, characterized in that: The shaft and the impeller are connected by a first bushing through riveting. The first bushing has a first protrusion. The impeller is connected to the first bushing through riveting, and the first protrusion is stuck on the impeller.

6. The fan structure according to claim 1, characterized in that: The drive assembly also includes a stator, the rotor is located inside the stator, the stator is annular and includes a magnetic core, a baffle is connected to the inner wall of the magnetic core, a metal wire is wound between the baffle and the inner wall of the magnetic core, and a second protrusion is provided on the outer wall of the magnetic core.

7. The fan structure according to claim 6, characterized in that: One end of the stator is provided with an end cover, and the side wall of the end cover is provided with an inward first groove, and the second protrusion is engaged in the first groove.

8. The fan structure according to claim 7, characterized in that: The end cap is provided with a countersunk hole, and a second bearing is provided in the countersunk hole. The rotating shaft is connected to the second bearing, and a wave washer is provided at the position where the second bearing fits against the bottom of the countersunk hole.

9. The fan structure according to claim 3, characterized in that: The first housing has a first opening at the position corresponding to the controller. The wires and connectors on the controller extend outward through the first opening, and the sidewalls of the wires, the sidewalls of the connectors, and the inner wall of the first opening are sealed with glue.

Images