Novel fan structure
By using a ring groove design and nested grease filling in the oil seal structure, the problem of external rotor fans being susceptible to corrosion in salt spray environments is solved, achieving efficient dynamic sealing and extended service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-07
- Publication Date
- 2026-03-24
AI Technical Summary
Existing external rotor fans are susceptible to corrosion in salt spray and corrosive environments such as the seaside, resulting in a short service life.
It adopts a ring groove design and oil seal structure, and forms a dynamic seal by filling grease with nested grooves to prevent salt spray and corrosive media from entering the motor.
It effectively increases fan life by more than 10 times, reduces production costs, and is suitable for harsh environments.
Smart Images
Figure CN224032803U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to fan technical field, especially a novel fan structure. BACKGROUND
[0002] The outer rotor fan is a fan structure with the motor rotor located outside. This structure is widely used in the fields of heat dissipation and ventilation, and has advantages in scenarios requiring large air volume, low noise, or compact design.
[0003] In the existing outer rotor fan on the market, the rotor is directly connected with the fan impeller and assembled with the stator for use. The stator generates a magnetic field after being powered on to drive the outer rotor to rotate. However, when the outer rotor is applied to some seaside scenarios, scenarios requiring salt mist protection, and scenarios requiring corrosion resistance, liquid or gaseous salt or corrosive substances from the outside can easily enter the fan, resulting in low service life.
[0004] Therefore, improvements are needed. UTILITY MODEL CONTENT
[0005] The utility model solves the technical problem in the prior art, and provides a novel fan structure to solve the problems in the background.
[0006] To solve the above technical problems, the utility model adopts the following technical scheme: a novel fan structure, comprising: a fan frame, the fan frame comprising a frame body, a mounting seat, and first blades; the mounting seat is arranged at the center of the frame body, and the outer wall of the mounting seat is circumferentially arranged with the first blades connected to the inner wall of the frame body; wherein the end face of the mounting seat is provided with a protruding first ring body and a second ring body, the first ring body and the second ring body are coaxially arranged, and a first groove for filling grease is formed between the first ring body and the second ring body; a fan blade, the fan blade comprising a fixing seat, second blades, and a rotating shaft; the fixing seat is inwardly recessed to form an installation space, the outer wall of the fixing seat is circumferentially arranged with the second blades, and the rotating shaft is arranged at the bottom of the installation space; wherein the bottom of the installation space is provided with a protruding third ring body, a fourth ring body, and a fifth ring body, the third ring body, the fourth ring body, and the fifth ring body are coaxially arranged; the third ring body and the fourth ring body form a second groove, and the fourth ring body and the fifth ring body form a third groove; when the fan blade is assembled to the fan frame, the fourth ring body is placed in the first groove, the first ring body is placed in the second groove, and the second ring body is placed in the third groove to form an oil seal structure.
[0007] Further, a magnetic ring is arranged on the side wall of the installation space.
[0008] Further, graphite gaskets, gaskets and first bearings are arranged between the rotating shaft and the mounting seat.
[0009] Further, the mounting seat is provided with an accommodating space formed by inwardly recessing on the end face away from the fan blade, the accommodating space is provided with a hollow positioning column, the motor stator and the PCB board are sleeved outside the positioning column, the spring, the second bearing and the snap spring are installed in the positioning column, the motor stator is electrically connected with the PCB board, and the rotating shaft passes through the spring, the second bearing and the snap spring.
[0010] Compared with the prior art, the utility model has the advantages that:
[0011] Efficient dynamic oil seal structure: the nested groove design formed by the first to fifth ring bodies effectively blocks the invasion of salt mist, corrosive gas or liquid into the motor interior, and solves the problem that the traditional outer rotor fan is easily eroded by the environment.
[0012] Low cost and high applicability: the simple structure of filling grease in the ring body groove realizes complex sealing effect, no additional sealing parts are needed, production cost is reduced, and it is especially suitable for harsh environments such as seaside. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is a structural schematic diagram of the utility model.
[0014] Figure 2 It is another angle structural schematic diagram of Figure 1
[0015] Figure 3 It is an explosion structural schematic diagram of the utility model.
[0016] Figure 4 It is a sectional structural schematic diagram of the utility model.
[0017] Figure 5 It is a local enlarged structural schematic diagram of Figure 4
[0018] Figure 6 It is a structural schematic diagram of a fan frame.
[0019] Figure 7 It is a structural schematic diagram of a fan frame.
[0020] Figure 8 It is a structural schematic diagram of a fan blade.
[0021] Figure 9 It is a structural schematic diagram of a fan blade.
[0022] Figure 10 It is a local structural schematic diagram of Figure 9
[0023] Reference numerals in the attached drawings: 1. Fan frame; 2. Frame body; 3. Mounting base; 4. First blade; 5. First ring body; 6. Second ring body; 7. First groove; 8. Fan blade; 9. Fixing base; 10. Second blade; 11. Shaft; 12. Third ring body; 13. Fourth ring body; 14. Fifth ring body; 15. Second groove; 16. Third groove; 17. Magnetic ring; 18. Graphite gasket; 19. Gasket; 20. First bearing; 21. Positioning post; 22. Motor stator; 23. PCB board; 24. Spring; 25. Second bearing; 26. Snap ring. Detailed Implementation
[0024] The present invention will now be described in further detail with reference to the accompanying drawings.
[0025] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "several" or "more than" means two or more, unless otherwise explicitly specified. In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. Moreover, "above," "over," and "on top" of a second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0026] In view of the technical problems described in the background art, as shown in the figure, a novel fan structure is provided, including: a fan frame 1, the fan frame 1 including a frame body 2, a mounting base 3, and a first blade 4; the mounting base 3 is disposed at the center of the frame body 2, and the first blade 4 is arranged in a circumferential array on the outer wall of the mounting base 3, connecting to the inner wall of the frame body 2; wherein, a protruding first ring body 5 and a second ring body 6 are provided on the end face of the mounting base 3, the first ring body 5 and the second ring body 6 are coaxially arranged, and a first groove 7 for filling grease is formed between the first ring body 5 and the second ring body 6; a fan blade 8, the fan blade 8 including a fixing base 9, a second blade 10, and a rotating shaft 11; the fixing base 9 is recessed inward to form an installation space. The second blades 10 are arranged in a circumferential array on the outer wall of the fixed base 9, and the rotating shaft 11 is located at the bottom of the installation space; wherein, the bottom of the installation space is provided with a protruding third ring 12, a fourth ring 13, and a fifth ring 14, which are coaxially arranged; the third ring 12 and the fourth ring 13 form a second groove 15, and the fourth ring 13 and the fifth ring 14 form a third groove 16; when the fan blade 8 is assembled onto the fan frame 1, the fourth ring 13 is placed in the first groove 7, the first ring 5 is placed in the second groove 15, and the second ring 6 is placed in the third groove 16, forming an oil seal structure.
[0027] In the above technical solution, the frame 2 has a square structure, providing overall support and airflow guidance. The mounting base 3 is fixed to the center of the frame 2, and its outer wall is connected to the inner wall of the frame 2 through the first blade 4 in a circumferential array, forming a static flow channel. The first ring 5 and the second ring 6: coaxially protrude from the end face of the mounting base 3, and a first groove 7 is formed between them for filling grease.
[0028] The fan blade 8 consists of a fixed base 9, a rotating shaft 11, and second blades 10. The fixed base 9 is recessed inward to form an installation space, and the outer wall is provided with a circumferential array of second blades 10. The rotating shaft 11 is fixed to the bottom of the installation space and is used to drive rotation. A third ring body 12, a fourth ring body 13, and a fifth ring body 14 are provided on the bottom of the installation space: they coaxially protrude from the bottom of the installation space to form a second groove 15 and a third groove 16.
[0029] During assembly, after inserting the shaft 11 of the fan blade 8 into the mounting base 3 of the fan frame 1, the rings nest together to form a multi-layer oil seal: the first groove 7 is filled with grease, the fourth ring 13 is embedded in the first groove 7; the first ring 5 is embedded in the second groove 15; and the second ring 6 is embedded in the third groove 16. The filled grease forms a dynamic seal during rotation, effectively preventing salt spray or corrosive media from entering the motor.
[0030] Dynamic sealing principle: When the fan is running, after the stator is energized and generates a magnetic field, it drives the fan blades 8 to rotate. The grease forms a centrifugal barrier between the first grooves 7, and media such as salt spray are blocked by the grease due to density differences.
[0031] Compared to similar products, its lifespan is increased by more than 10 times. It is also expected to increase the lifespan of fans by 3-5 times under specific environmental conditions.
[0032] Furthermore, this utility model includes a magnetic ring 17, which is attached to the side wall of the mounting space. A graphite gasket 18, a gasket 19, and a first bearing 20 are provided between the rotating shaft 11 and the mounting base 3. The mounting base 3 has an inwardly recessed receiving space on its end face away from the fan blade 8. The receiving space has a hollow positioning post 21. A motor stator 22 and a PCB board 23 are sleeved on the outside of the positioning post 21. A spring 24, a second bearing 25, and a retaining ring 26 are installed inside the positioning post 21. The motor stator 22 is electrically connected to the PCB board 23, and the rotating shaft 11 passes through the spring 24, the second bearing 25, and is connected to the retaining ring 26.
[0033] Based on the above technical solution, the drive component is further improved: the magnetic ring 17 is attached to the side wall of the installation space and serves as the permanent magnet part of the external rotor motor. The motor stator 22 and PCB board 23 are sleeved on the positioning post 21 of the mounting base 3. The stator coil is electrically connected to the PCB board 23. After being energized, it drives the magnetic ring 17 to rotate, which in turn drives the fan blade 8 to rotate.
[0034] Support structure for rotating shaft 11: Rotating shaft 11 passes through graphite gasket 18, gasket 19, first bearing 20, spring 24, and second bearing 25 in sequence, and is finally fixed by snap ring 26. Graphite gasket 18 is used to reduce rotational friction. First bearing 20 and second bearing 25 are used to provide radial support and reduce rotational friction. Spring 24 provides preload on rotating shaft 11 to adjust the tightness between fan blade 8 and mounting base 3.
[0035] The above does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the scope of the technical solution of this utility model.
Claims
1. A novel fan structure, characterized in that, include: A fan frame includes a frame body, a mounting base, and a first blade; the mounting base is disposed at the center of the frame body, and the first blade is arranged in a circumferential array on the outer wall of the mounting base to connect to the inner wall of the frame body; wherein, a protruding first ring body and a second ring body are provided on the end face of the mounting base, the first ring body and the second ring body are coaxially arranged, and a first groove for filling grease is formed between the first ring body and the second ring body. The fan blade includes a fixed base, a second blade, and a rotating shaft. The fixed base is recessed inward to form an installation space. The second blade is arranged in a circumferential array on the outer wall of the fixed base. The rotating shaft is located at the bottom of the installation space. The bottom of the installation space has protruding third, fourth, and fifth rings, which are coaxially arranged. The third and fourth rings form a second groove, and the fourth and fifth rings form a third groove. When the fan blades are assembled onto the fan frame, the fourth ring is placed in the first groove, the first ring is placed in the second groove, and the second ring is placed in the third groove, forming an oil seal structure.
2. The novel fan structure according to claim 1, characterized in that: Includes a magnetic ring, which is attached to the side wall of the installation space.
3. The novel fan structure according to claim 2, characterized in that: A graphite gasket, a washer, and a first bearing are provided between the rotating shaft and the mounting base.
4. The novel fan structure according to claim 3, characterized in that: The mounting base has an inwardly recessed receiving space on its end face away from the fan blade. The receiving space has a hollow positioning post. The positioning post is fitted with a motor stator and a PCB board. A spring, a second bearing, and a retaining ring are installed inside the positioning post. The motor stator is electrically connected to the PCB board. The rotating shaft passes through the spring, the second bearing, and is connected to the retaining ring.