Fan stator structure and fan

Abstract

The application relates to the field of mechanical manufacturing, in particular to a fan stator structure and a fan. The fan stator structure comprises an insulation structure formed by plastic wrapping of an outer wall of a stator core, the insulation structure extends axially to form upper and lower insulation bosses, the outer side of the insulation structure is provided with a winding groove, the winding groove is provided with a stator winding and an insulation plug, the end of the lower insulation boss is provided with a rectangular groove, the upper end of the insulation structure is provided with a detachable end cover, the end cover is provided with a clamping hole and a hollow groove, the upper insulation boss is provided with a U-shaped groove and a clamping column, and the insulation plug is provided with a guide slope. The fan comprises a fan outer frame and the above-mentioned fan stator structure, the outer frame is provided with a mounting seat and a connecting column, the outer side of the stator structure is sleeved with a rotor, the mounting seat and the lower insulation boss are provided with an insulation sheet, and the lower insulation boss is sleeved with a gasket. The application has the technical effects of effectively restraining the stator winding, facilitating installation and dismounting, facilitating heat dissipation of the end of the stator winding and guaranteeing electrical insulation performance.

Description

Technical Field

[0001] This application relates to the field of mechanical structures, and in particular to a fan stator structure and a fan. Background Technology

[0002] As a common airflow device, fans are widely used in heat dissipation and ventilation. One of its core components is the stator structure, and the insulation performance, winding and fixing method, and heat dissipation effect of the stator structure directly affect the efficiency and service life of the fan.

[0003] Currently, most existing wind turbine stators employ a split insulation structure, such as adding insulating paper or insulating sleeves to the stator core before embedding the winding slots for winding. While this achieves basic insulation, it suffers from problems such as easy displacement of the insulation layer, insecure winding fixation, and easy loosening of the slot openings. In actual operation, due to vibration or temperature rise, the windings may detach from the slot openings, leading to short circuits or damage, affecting the reliability of the wind turbine. Furthermore, the split insulation structure involves cumbersome assembly processes, low production efficiency, and poor heat dissipation channels, easily causing localized overheating.

[0004] The aforementioned technologies suffer from several drawbacks: poor insulation reliability and low assembly efficiency due to incomplete insulation structure; loose windings and high short-circuit risk due to insecure winding fixation; and temperature rise and short lifespan due to insufficient heat dissipation structure. Utility Model Content

[0005] To overcome the shortcomings of the prior art, this application provides a fan stator structure and fan, which achieves a solid fixation of the stator winding, a comprehensive improvement in insulation performance, convenient assembly and optimized heat dissipation through a plastic-coated integrated insulation structure, slotted insulation strips and detachable end caps, thereby significantly improving the operational reliability and production efficiency of the fan.

[0006] This application is achieved through the following technical solution: A wind turbine stator structure includes a stator core. An insulating structure is formed on the outer wall of the stator core by plastic coating. The insulating structure extends coaxially along the central hole of the stator core to form an upper insulating boss and a lower insulating boss. A plurality of winding slots are formed circumferentially on the radially outer side of the insulating structure. A stator winding is provided in the winding slot. An insulating insert is provided at the slot opening. The insulating insert is sealed on the radially outer side of the stator winding to press and constrain the stator winding within the winding slot.

[0007] By adopting the above technical solutions, the plastic coating molding process integrally molds the insulation structure onto the outer wall of the stator core, forming a uniform, continuous, and seamless insulation layer. This effectively avoids the electrical safety hazards caused by the easy breakage and uneven coverage of traditional insulation materials. The upper and lower insulation bosses extend axially, not only enhancing the insulation protection at the ends of the stator core but also providing accurate installation references and support surfaces for components such as end covers and connecting columns. The winding slots are evenly distributed circumferentially, facilitating the neat arrangement and embedding of the stator windings. Insulating strips seal the openings of the winding slots from the radial outside, and through their own elasticity or interference fit, they press the stator windings together, effectively preventing the windings from loosening, displacing, or dislodging due to electromagnetic forces or vibrations during motor operation, significantly improving the mechanical stability and operational reliability of the stator structure.

[0008] Optionally, each end of the lower insulating boss is provided with a plurality of rectangular grooves.

[0009] By adopting the above technical solution, the rectangular groove is used to engage with the raised structure of the inner ring of the gasket, thereby achieving circumferential positioning between the gasket and the lower insulating boss, preventing relative rotation between the two, ensuring the accuracy of the position of each component during assembly, and enhancing the torsional resistance and connection stability of the overall structure.

[0010] Optionally, the upper end of the insulating structure is provided with an end cap for binding the stator winding, and the end cap is detachably connected to the upper insulating boss.

[0011] By adopting the above technical solution, the end cover covers the stator winding end, forming an axial constraint and preventing the winding end from warping, loosening, or deforming under electromagnetic or external forces. The detachable connection method allows the end cover to be easily installed and removed, greatly facilitating the insertion, inspection, and maintenance of the stator winding, and improving production and maintenance efficiency.

[0012] Optionally, the end cap has an arc-shaped structure and a snap-fit ​​hole is provided on the end cap for snapping with the upper insulating boss.

[0013] By adopting the above technical solution, the arc-shaped structure conforms to the aerodynamic characteristics, which can reduce the obstruction and disturbance of airflow by the end cover during fan operation, thereby reducing wind resistance and operating noise. The snap-fit ​​hole and the snap-fit ​​structure on the upper insulating boss cooperate to realize the quick positioning and fixation of the end cover without the need for additional tools or fasteners, simplifying the assembly process and improving assembly efficiency.

[0014] Optionally, the end cover is circumferentially arranged with several hollowed-out grooves, the cross-section of which is trapezoidal, for heat dissipation at the ends of the stator winding.

[0015] By adopting the above technical solution, the hollowed-out slots provide a channel for the stator winding ends to directly contact the outside air, effectively increasing the heat dissipation area, promoting the convection and dissipation of heat from the windings, and preventing excessive local temperature rise. The trapezoidal cross-section design ensures structural strength while avoiding stress concentration caused by sharp corners, thus improving the durability of the end caps.

[0016] Optionally, the sidewall of the upper insulating boss is provided with a plurality of U-shaped grooves spaced apart circumferentially, and the portion between adjacent U-shaped grooves forms a locking post that can be radially elastically deformed; the locking post is provided with a locking claw protruding radially outward, and the locking claw is used to engage with the locking hole of the end cap.

[0017] By adopting the above technical solution, the U-shaped groove enables the locking post to have radial elastic deformation capability. When pressure is applied to the end cap, the locking post can retract inward, allowing the claws to smoothly pass through the locking holes. Subsequently, the locking post rebounds, and the claws hook onto the end cap to achieve a secure lock. This structure realizes "one-click" locking installation and removal of the end cap, which is simple and quick to operate, reliable in connection, and eliminates the need for additional fasteners such as screws, reducing the number of parts and cost.

[0018] Optionally, guide bevels are formed at both ends of the insulating strip.

[0019] By adopting the above technical solution, the guide slope angle makes the end of the insulating strip beveled or rounded, which can play a guiding and centering role when inserted into the winding groove, effectively reducing insertion resistance, preventing jamming or damage caused by skew, and significantly improving the installation efficiency and success rate of the insulating strip.

[0020] A fan includes a fan frame and a fan stator structure as described above. The fan frame has a mounting base inside, and the mounting base has an integrally formed connecting column. The connecting column passes through the upper insulating boss, the lower insulating boss, and the central hole of the stator core of the fan stator structure, and is clearance-fitted with the inner wall of the central hole. A rotor is rotatably fitted on the outside of the fan stator structure, and a top cover is fixedly installed on the upper end of the rotor.

[0021] By adopting the above technical solution, the stator structure of the wind turbine is fitted onto the connecting column of the outer frame of the wind turbine through its central hole. The clearance fit between the connecting column and the central hole allows for minor alignment adjustments of the stator structure during installation, compensating for manufacturing and assembly errors, reducing installation stress, and ensuring uniform air gap between the stator and rotor. The rotor is fitted onto the outside of the stator to form an outer rotor structure, which is compact. The top cover protects the internal components and guides airflow, completing the assembly of the entire unit.

[0022] Optionally, an insulating sheet is provided between the mounting base and the lower insulating boss, and the insulating sheet is sleeved on the connecting post.

[0023] By adopting the above technical solution, the insulating sheet is placed between the metal mounting base and the insulation structure of the stator, providing an additional electrical isolation barrier. This effectively prevents the risk of leakage or short circuit that may be caused by direct contact between the mounting base and the stator core, and significantly improves the electrical safety performance of the fan product.

[0024] Optionally, a gasket is fitted on the lower insulating boss, and the gasket is located above the insulating sheet. The inner ring of the gasket has a protrusion that engages with the rectangular groove on the lower insulating boss.

[0025] By adopting the above technical solution, the gasket achieves circumferential positioning by engaging with the rectangular groove of the lower insulating boss through the protrusion of its inner ring, preventing the gasket from rotating with the connecting post and ensuring stable pressing between the insulating sheet and the stator structure. The gasket also disperses the axial pressure transmitted by the mounting base through the connecting post, making the force more even and protecting the insulation structure and stator core from localized pressure damage.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. This application uses an integrated insulation structure with plastic coating to tightly bond the insulation layer to the stator core, which effectively improves the insulation reliability and structural strength, while simplifying the production process and improving the assembly efficiency and consistency of the stator assembly. 2. By setting an insulating strip with a matching shape at the opening of the winding slot, this application can effectively press and constrain the stator winding from the radial outside, preventing the winding from loosening due to vibration or electromagnetic force during operation, thus significantly improving the reliability and safety of motor operation. 3. By setting a detachable end cover with a hollow heat dissipation structure and optimizing the overall structure of the stator and fan, this application not only facilitates maintenance but also significantly improves the heat dissipation conditions at the winding ends. At the same time, it achieves a compact layout, precise positioning, and stable operation of the whole machine, and extends the service life of the fan. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of a wind turbine stator structure as described in Embodiment 1; Figure 2 This is a three-dimensional structural diagram of the insulation structure described in Embodiment 1; Figure 3 This is a three-dimensional structural diagram of the end cap described in Embodiment 1; Figure 4 This is a three-dimensional structural diagram of the insulating insert described in Embodiment 1; Figure 5 This is a three-dimensional structural diagram of a fan as described in Embodiment 2; Figure 6 This is an assembly diagram of the insulating sheet described in Embodiment 2; Figure 7 This is a three-dimensional structural diagram of the mounting base described in Embodiment 2; Figure 8 This is a three-dimensional structural diagram of the insulating sheet described in Embodiment 2; Figure 9 This is a three-dimensional structural diagram of the gasket described in Embodiment 2.

[0028] In the diagram: 1. Stator core; 2. Insulation structure; 21. Upper insulation boss; 211. U-shaped groove; 212. Snap-fit ​​post; 213. Claw; 22. Lower insulation boss; 221. Rectangular groove; 23. Winding groove; 3. Fan outer frame; 31. Mounting base; 311. Connecting post; 4. Insulating strip; 5. End cover; 51. Snap-fit ​​hole; 52. Hollowed-out groove; 6. Insulating sheet; 7. Gasket; 71. Protrusion; 8. Rotor; 9. Top cover. Detailed Implementation

[0029] The following will be combined with the appendix Figure 1 To be continued Figure 9 The technical solutions of the various embodiments of this application have been clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0030] Example 1 Reference Figure 1 This application discloses a wind turbine stator structure, including a stator core 1. An insulating structure 2 is formed on the outer wall of the stator core 1 by plastic coating. The insulating structure 2 extends coaxially along the central hole of the stator core 1 to form an upper insulating boss 21 and a lower insulating boss 22. A plurality of winding slots 23 are formed circumferentially on the radially outer side of the insulating structure 2. A stator winding is provided in the winding slot 23. An insulating insert 4 is provided at the slot opening of the winding slot 23. The insulating insert 4 is sealed on the radially outer side of the stator winding to press and constrain the stator winding in the winding slot 23.

[0031] For details, please refer to Figure 1 and Figure 2 Specifically, the stator core 1 is the basic component of the wind turbine stator, and it is usually made of laminated silicon steel sheets. Silicon steel sheets have good magnetic permeability, which can reduce eddy current losses in the core and improve the efficiency of the wind turbine. The stator core 1 is generally cylindrical in shape, with a hole in the center for mounting the motor shaft or other components. Besides silicon steel sheets, other materials with good magnetic permeability, such as ferrite, can also be used to make the stator core 1.

[0032] refer to Figure 2The insulation structure 2 is formed on the outer wall of the stator core 1 using a plastic coating process. Plastic coating is a process that wraps plastic material around the surface of a metal part, allowing the plastic and metal to bond tightly together to form a whole. The plastic material used in the insulation structure 2 typically has good insulation, mechanical, and heat resistance properties, such as polyvinyl chloride (PVC) and polypropylene (PP). The upper insulating boss 21 and the lower insulating boss 22 are portions of the insulation structure 2 that extend axially along the center hole of the stator core 1, further enhancing the insulation effect between the stator core 1 and the external environment.

[0033] refer to Figure 1 and Figure 2 The winding slots 23 are formed circumferentially on the radially outer side of the insulation structure 2 to accommodate the stator windings. The shape and size of the winding slots 23 are designed according to the specifications and requirements of the stator windings. The number of winding slots 23 can be adjusted according to the power and performance requirements of the fan; generally, the larger the power of the fan, the more winding slots 23 may be required. The stator windings are made of wire and are the key component for generating the magnetic field in the fan. The wires are usually made of materials with good conductivity, such as copper or aluminum. The stator windings are wound in the winding slots 23 according to a certain pattern to generate the required magnetic field.

[0034] refer to Figure 2 The upper insulating boss 21 has several U-shaped grooves 211 spaced circumferentially on its sidewall. The portion between adjacent U-shaped grooves 211 forms a radially elastically deformable locking post 212. The locking post 212 has a locking claw 213 protruding radially outward, which engages with the locking hole 51 of the end cover 5. The design of the U-shaped grooves 211 gives the locking post 212 a certain degree of elasticity. When installing the end cover 5, the locking post 212 can undergo radial elastic deformation, allowing the locking claw 213 to smoothly engage with the locking hole 51. After installation, the locking post 212 returns to its original shape, and the locking claw 213 tightly engages with the locking hole 51, ensuring the secure installation of the end cover 5. The lower insulating boss 22 has several rectangular grooves 221 at its end. The rectangular grooves 221 can be used to engage with other components, such as the protrusion 71 of the inner ring of the gasket 7 mentioned later, which can engage with the rectangular grooves 221 for positioning and fixing. The rectangular groove 221 has a regular shape, which facilitates processing and manufacturing, and also ensures the fitting accuracy with other parts. In addition to the rectangular groove 221, other shapes of grooves can also be designed, such as circular grooves, triangular grooves, etc., but the rectangular groove 221 is more common and convenient in practical applications.

[0035] refer to Figure 3The upper end of the insulation structure 2 is provided with an end cover 5 for binding the stator winding. The end cover 5 is detachably connected to the upper insulation boss 21. The end cover 5 can further bind the stator winding and prevent it from shaking and shifting during operation. The end cover 5 has an arc-shaped structure, which can better fit the shape of the stator winding and improve the binding effect. The end cover 5 has a snap-fit ​​hole 51 for snapping with the upper insulation boss 21. The snap-fit ​​method makes the installation and removal of the end cover 5 convenient, facilitating the inspection and maintenance of the stator winding. The end cover 5 has several hollow grooves 52 arranged circumferentially, and the cross-section of the hollow grooves 52 is trapezoidal. The function of the hollow grooves 52 is to provide heat dissipation for the ends of the stator winding. The trapezoidal cross-section design can increase the heat dissipation area and improve the heat dissipation effect while ensuring a certain structural strength.

[0036] refer to Figure 4 The insulating insert 4 is disposed at the opening of the winding slot 23 to press and constrain the stator winding. The insulating insert 4 is generally made of a material with good insulation properties, such as insulating paper or insulating plastic. The axial ends of the insulating insert 4 are formed with guide bevels. The design of the guide bevels facilitates the insertion of the insulating insert 4 into the winding slot 23, while also preventing damage to the stator winding during the insertion process.

[0037] The implementation principle of this embodiment is as follows: The wind turbine stator structure of this embodiment solves the problems of poor uniformity and tightness of traditional insulation methods through the plastic-coated insulation structure 2, thereby improving the insulation effect. The design of components such as the insulating strip 4 and end cap 5 further constrains the stator winding, ensuring its positional stability and avoiding problems such as loosening and displacement. The rectangular groove 221 of the lower insulating boss 22 facilitates the cooperation between components, improving the stability and reliability of the entire stator structure. Compared with the traditional wind turbine stator structure, it has significant improvements and advantages.

[0038] Example 2 refer to Figure 5 and Figure 6 This application also discloses a fan, in which a mounting base 31 is provided inside the fan frame 3, and an integrally formed connecting column 311 is provided on the mounting base 31. The connecting column 311 passes through the upper insulating boss 21, the lower insulating boss 22 and the center hole of the stator core 1 of the fan stator structure, and is clearance-fitted with the inner wall of the center hole. A rotor 8 is rotatably sleeved on the outside of the fan stator structure, and a top cover 9 is fixedly installed on the upper end of the rotor 8.

[0039] For details, please refer to Figure 5Specifically, the fan outer frame 3 is the outer shell of the fan, which not only protects the internal components but also guides the airflow. The fan outer frame 3 is generally made of materials such as metal or plastic, possessing a certain strength and rigidity. The mounting base 31 is located inside the fan outer frame 3 and is used to support and fix the fan stator structure. The mounting base 31 is usually integrally formed with the fan outer frame 3 or fixedly connected by bolts or other means.

[0040] Reference Figure 5 The rotor 8 is the rotating component of the fan, rotatably mounted on the outside of the fan stator structure. The rotor 8 is typically composed of permanent magnets or windings; when the stator windings generate a magnetic field, the rotor 8 rotates under the influence of that magnetic field. The top cover 9 is fixedly installed on the upper end of the rotor 8, protecting the internal components and also serving an aesthetic purpose. The top cover 9 is generally made of materials such as plastic or metal, and its shape and color can be adjusted according to the fan's design requirements.

[0041] Reference Figure 6 and Figure 7 The connecting post 311 is an integrally formed part of the mounting base 31, passing through the upper insulating boss 21, the lower insulating boss 22, and the center hole of the stator core 1 in the fan stator structure. The connecting post 311 has a clearance fit with the inner wall of the center hole. This fit ensures the installation accuracy of the fan stator structure while allowing for a certain degree of thermal expansion and vibration, avoiding stress concentration caused by rigid connections. The connecting post 311 is generally made of metal materials, such as stainless steel or aluminum alloy, to ensure its strength and rigidity.

[0042] Reference Figure 8 An insulating sheet 6 is provided between the mounting base 31 and the lower insulating boss 22, and the insulating sheet 6 is sleeved on the connecting post 311. The function of the insulating sheet 6 is to further enhance the insulation effect between the mounting base 31 and the lower insulating boss 22 and prevent leakage. The insulating sheet 6 is generally made of materials with good insulation properties, such as insulating paper or insulating plastic.

[0043] Reference Figure 9 A gasket 7 is fitted onto the lower insulating boss 22, and the gasket 7 is positioned above the insulating sheet 6. The inner ring of the gasket 7 has a protrusion 71 that engages with a rectangular groove 221 on the lower insulating boss 22. The gasket 7 serves as a buffer and seal, reducing friction and vibration between components. The engagement of the protrusion 71 with the rectangular groove 221 ensures the stability of the gasket 7's position, preventing displacement during fan operation.

[0044] The implementation principle of this embodiment is as follows: This embodiment applies a fan stator structure to a fan. Through reasonable structural design, such as the installation method of the connecting column 311, and the setting of the insulating sheet 6 and the gasket 7, the normal operation and safety performance of the fan are ensured. Compared with traditional fans, fans using this fan stator structure have better insulation performance and stability, which can improve the service life and working efficiency of the fan.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of this application.

Claims

1. A wind turbine stator structure, comprising a stator core (1), characterized in that, An insulating structure (2) is formed on the outer wall of the stator core (1) by plastic coating. The insulating structure (2) extends coaxially along the central hole of the stator core (1) to form an upper insulating boss (21) and a lower insulating boss (22). A plurality of winding slots (23) are formed on the radial outer side of the insulating structure (2). A stator winding is provided in the winding slot (23). An insulating insert (4) is provided at the slot opening of the winding slot (23). The insulating insert (4) is sealed on the radial outer side of the stator winding to press and constrain the stator winding in the winding slot (23).

2. The wind turbine stator structure according to claim 1, characterized in that, The ends of the lower insulating boss (22) are provided with several rectangular grooves (221).

3. The wind turbine stator structure according to claim 1, characterized in that, The upper end of the insulating structure (2) is provided with an end cap (5) for binding the stator winding, and the end cap (5) is detachably connected to the upper insulating boss (21).

4. A wind turbine stator structure according to claim 3, characterized in that, The end cap (5) has an arc-shaped structure and a snap-fit ​​hole (51) is provided on the end cap (5) for snapping with the upper insulating boss (21).

5. A wind turbine stator structure according to claim 3, characterized in that, The end cap (5) has several hollowed-out grooves (52) arranged around its circumference. The cross-section of the hollowed-out grooves (52) is trapezoidal, which is used to dissipate heat from the end of the stator winding.

6. The wind turbine stator structure according to claim 4, characterized in that, The sidewall of the upper insulating boss (21) is provided with a plurality of U-shaped grooves (211) spaced apart in the circumferential direction, and the portion between adjacent U-shaped grooves (211) forms a radially elastically deformable snap-fit ​​post (212); the snap-fit ​​post (212) is provided with a snap-fit ​​claw (213) protruding radially outward, and the snap-fit ​​claw (213) is used to snap-fit ​​with the snap-fit ​​hole (51) of the end cover (5).

7. The wind turbine stator structure according to claim 1, characterized in that, The insulating insert (4) has guide bevels at both ends of its axial edge.

8. A fan, characterized in that, The fan includes a fan frame (3) and a fan stator structure as described in any one of claims 1 to 7. The fan frame (3) is provided with a mounting base (31). The mounting base (31) is provided with an integrally formed connecting column (311). The connecting column (311) passes through the upper insulating boss (21), the lower insulating boss (22) and the center hole of the stator core (1) of the fan stator structure, and is in clearance fit with the inner wall of the center hole. The fan stator structure is rotatably fitted with a rotor (8). The upper end of the rotor (8) is fixedly installed with a top cover (9).

9. A fan according to claim 8, characterized in that, An insulating sheet (6) is provided between the mounting base (31) and the lower insulating boss (22), and the insulating sheet (6) is sleeved on the connecting post (311).

10. A fan according to claim 9, characterized in that, A gasket (7) is fitted on the lower insulating boss (22), and the gasket (7) is located above the insulating sheet (6). The inner ring of the gasket (7) has a protrusion (71) that engages with the rectangular groove (221) on the lower insulating boss (22).

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