Fan

Abstract

The utility model provides a fan, and belongs to the technical field of fans. The problem that an existing fan is poor in universality is solved. The fan comprises a stator shaft, a stator assembly and an outer rotor, the stator assembly is located in the outer rotor, the inner end of the stator shaft is fixedly connected with the stator assembly, the outer end of the stator shaft penetrates out of the rear end of the outer rotor, the center of the front end of the outer rotor is provided with a shaft head which protrudes forwards in the axial direction of the stator shaft, and the shaft head is detachably connected with a blade angle used for installing blades in a sleeved mode. The fan has the advantages that different blades can be mounted, and the universality is good.

Description

Technical Field

[0001] This utility model belongs to the field of wind turbine technology and relates to a wind turbine. Background Technology

[0002] Industrial fans are large fans designed specifically for industrial environments. They are mainly used in factories, warehouses, workshops and other places to provide air circulation and cooling, improve ventilation and temperature in the working environment, and improve air quality and employee comfort.

[0003] Existing industrial fans, such as the stator shaft mounting structure and external rotor axial flow fan disclosed in Chinese patent literature [Patent No.: 202122925752.7; Application Publication No.: CN216975278U], include a column, a stator shaft, a stator assembly, an external rotor, and several fan blades. The stator assembly is coaxially fixed on the stator shaft, the external rotor is coaxially and rotatably mounted outside the stator assembly, several fan blades are fixedly mounted on the external rotor, and one end of the stator shaft is fixed on the column.

[0004] In this type of axial flow fan, the inner end of the blades is attached to the outer rotor, and bolts are used to connect the blades and the outer rotor, thus fixing the blades to the outer rotor. The rotation of the outer rotor drives the rotation of the blades. However, in this type of axial flow fan, the inner end of the blades must match the installation position of the outer rotor, and only blades made of fiberglass can be installed. This results in the outer rotor of this type of fan being able to install only one type of blade, leading to poor versatility. Summary of the Invention

[0005] The purpose of this utility model is to address the aforementioned problems in the existing technology by proposing a fan that solves the technical problem of how to enable the fan to be equipped with different blades, thus achieving good versatility.

[0006] The objective of this utility model can be achieved through the following technical solution: A fan includes a stator shaft, a stator assembly, and an outer rotor. The stator assembly is located in the outer rotor. The inner end of the stator shaft is fixedly connected to the stator assembly, and the outer end extends out of the rear end of the outer rotor. The outer rotor has a shaft head protruding forward along the axial direction of the stator shaft at its center. A blade angle for mounting blades is detachably sleeved on the shaft head.

[0007] The blade angles are detachably attached to the shaft head, and different blade angles can be installed on the shaft head. The blade angles are used to install blades, and different blade angles can be arranged with different blades, so that the fan can be equipped with different blades, which has good versatility.

[0008] In one type of fan described above, the outer rotor includes a cover cast from aluminum at its front end. The cover has a third fixing hole at its center. The outer peripheral wall of the inner end of the shaft head has several spaced-apart strip grooves along the axial direction of the shaft head and at least one annular groove along the circumferential direction of the shaft head. The inner end of the shaft head is embedded in the third fixing hole. The cover is partially embedded in the strip grooves and the annular groove, thus fixing the cover and the shaft head together. During processing, the shaft head is placed in the processing position, and then the cover is cast, allowing molten aluminum to flow into the strip grooves and the annular groove. After the molten aluminum cools, the cover naturally forms, and the cover and the shaft head are interlocked and fixed together, facilitating the connection. The cover is made of aluminum, providing good heat dissipation, while the shaft head is made of iron, providing high strength.

[0009] In the aforementioned type of fan, the stator assembly has 54 winding slots evenly spaced along its circumferential edge, and 48 magnets are evenly fixed to the inner circumferential wall of the outer rotor, with gaps between adjacent magnets. This fan has 54 winding slots and 48 magnets (48 poles). The fewer poles result in a higher synchronous speed, increasing the fan's power. Furthermore, it reduces cogging torque, decreases harmonic losses, and improves efficiency, indirectly boosting the fan's power. Finally, by controlling the torque drop, the fan's speed advantage is significantly maintained while the torque drop is limited, resulting in a high-speed, low-torque fan that further increases its power.

[0010] In one type of fan described above, the outer end of the shaft head has an external thread, and the middle of the shaft head has a first keyway that is elongated and axially aligned with the shaft head. The center of the blade corner has a through mounting hole, and the wall of the mounting hole has a second keyway that is elongated and axially aligned with the shaft head. A key is embedded in the first and second keyways to achieve circumferential positioning of the shaft head and blade corner, which is convenient. The external thread can be threaded to a nut, and the axial positioning of the blade corner is achieved by locking the nut, making blade corner positioning convenient.

[0011] In one type of fan described above, the blade includes a central rotating disk and several equally spaced mounting plates radiating outwards from the rotating disk. The mounting holes are located in the rotating disk, and each mounting plate has several first fixing holes for mounting the blades. The blades are mounted on the mounting plate by bolts passing through them and into the first fixing holes. This installation is convenient, and multiple first fixing holes are needed to improve the stability of the mounting.

[0012] In another scenario, in one of the aforementioned fan types, several fan-shaped positioning grooves are evenly spaced on the outer end face of the blade corner, forming a circle. The bottom of each positioning groove has a fixing blind hole. The inner end of the blade is embedded in the positioning groove, and the blade is fixedly connected to the blade corner by fasteners passing through the blade and inserted into the fixing blind hole.

[0013] In one type of fan described above, the bottom of the positioning groove also has a protruding, arc-shaped retaining strip. This retaining strip is embedded in the blades. A circular pressure plate holds the inner ends of all the blades in place, and fasteners pass through the pressure plate and the blades, passing through the fixing blind holes to secure the blades to the blade angle. The retaining strip and pressure plate enhance the strength of the blade connection; even if some bolts loosen, the blades will not fall off, thus improving the fan's stability and safety.

[0014] In one of the aforementioned fan components, the fan further includes several connecting rods and two clamping brackets, each shaped like a cross or a Y. The inner side of each clamping bracket has a cross-shaped or Y-shaped groove, and the outer end of each clamping bracket has a second fixing hole for fasteners to pass through. The center of each clamping bracket has an elongated positioning hole, and the connecting rods have elongated adjustment holes. The inner end of each connecting rod can be inserted into the slots at the outer ends of the two grooves. By fastening fasteners through the second fixing hole and the adjustment hole and locking them in place, the connecting rods can be clamped and fixed by the two clamping brackets. Insert the inner end of the connecting rod into the grooves at the outer ends of the two clamping brackets. Then, tighten the fasteners, such as bolts, through the second fixing hole and the adjusting hole. This clamps the connecting rod securely. Since the sum of the depths of the two grooves is less than the thickness of the connecting rod (for example, if the sum of the depths of the two grooves is 38mm and the thickness of the connecting rod is 40mm), there is a gap between the two clamping brackets after they clamp the connecting rod. This allows the fasteners to be tightened more effectively, improving the firmness of the connection between the clamping brackets and the connecting rod, thus increasing the stability of the motor installation and extending the service life of the fan.

[0015] In one type of fan described above, the outer end of the stator shaft is a flat section, both sides of which are arc-shaped and have external threads. The flat section passes through the positioning hole. This facilitates the connection between the stator shaft and the clamping bracket, resulting in a high degree of secure connection.

[0016] In one of the aforementioned fan types, the clamping bracket is integrally formed from metal material by stamping, the clamping bracket is made of fiberglass material, or the clamping bracket is made of plastic material.

[0017] Compared with the prior art, the fan provided by this utility model has the following advantages:

[0018] 1. The blade angles of this fan are detachably sleeved and connected to the shaft head. Different blade angles can be installed on the shaft head, and the blade angles are used to install blades. Different blade angles can be arranged with different blades, so the fan can be equipped with different blades, which has good versatility.

[0019] 2. When the cover of this fan is formed by casting, the cover and the shaft head are snapped together and fixed, which is convenient. The cover is made of aluminum material, which makes the heat dissipation of the cover good. The shaft head is made of iron material, which has high strength. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the front of Embodiment 1 of this fan.

[0021] Figure 2 This is a schematic diagram of the overall structure on the back of Embodiment 1 of this fan.

[0022] Figure 3 This is an exploded view of the fan cover and shaft head.

[0023] Figure 4 This is a schematic diagram showing the positions of the winding slots and magnets of the fan motor.

[0024] Figure 5 This is an exploded view of the two clamping supports of this wind turbine.

[0025] Figure 6 This is an exploded view of the blade angle and blades in Embodiment 2 of this wind turbine.

[0026] In the diagram, 1. Stator shaft; 2. Stator assembly; 21. Winding slot; 3. Outer rotor; 31. Shaft head; 311. Strip groove; 312. Annular groove; 313. First keyway; 32. Cover; 321. Third fixing hole; 4. Blade; 5. Blade angle; 51. Mounting hole; 52. Second keyway; 53. Rotating disk; 54. Mounting plate; 541. First fixing hole; 55. Positioning groove; 56. Fixing blind hole; 57. Snap-fit ​​strip; 6. Magnet; 7. Pressure plate; 8. Connecting rod; 81. Adjustment hole; 9. Clamping bracket; 91. Second fixing hole; 92. Positioning hole; 10. Slide groove. Detailed Implementation

[0027] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0028] Example 1

[0029] like Figure 1 , Figure 2As shown, the fan includes a stator shaft 1, a stator assembly 2, an outer rotor 3, blades 4, blade angles 5, magnets 6, connecting rods 8, and a clamping bracket 9.

[0030] like Figure 3 As shown, the outer rotor 3 includes a cover 32 cast from aluminum material at the front end and a shaft head 31 protruding forward along the axial direction of the stator shaft 1. The cover 32 has a third fixing hole 321 at its center. In this embodiment, the outer peripheral wall of the inner end of the shaft head 31 has four strip grooves 311 spaced apart along the axial direction of the shaft head 31 and one annular groove 312 circumferentially arranged along the shaft head 31. In actual production, the number of strip grooves 311 can be three or six, and the number of annular grooves 312 can be two or three. The inner end of the shaft head 31 is embedded in the third fixing hole 321, and the cover 32 is partially embedded in the strip grooves 311 and the annular groove 312, thus fixing the cover 32 and the shaft head 31 together.

[0031] The outer end of the shaft head 31 has an external thread, and the middle of the shaft head 31 has a first keyway 313 that is elongated and arranged along the axial direction of the shaft head 31. The center of the blade angle 5 has a through mounting hole 51, and the wall of the mounting hole 51 has a second keyway 52 that is elongated and arranged along the axial direction of the shaft head 31. In this embodiment, the blade angle 5 includes a rotating disk 53 located in the middle and six equally spaced mounting plates 54 that radiate outwards from the rotating disk 53. The mounting hole 51 is located in the rotating disk 53, and the mounting plate 54 has four first fixing holes 541 for mounting the blade 4. In actual production, the number of mounting plates 54 can be three or eight, and the number of first fixing holes 541 can be three or six.

[0032] The stator assembly 2 is located within the outer rotor 3. The inner end of the stator shaft 1 is fixedly connected to the stator assembly 2, and the outer end extends out through the rear end of the outer rotor 3. For example... Figure 4 As shown, the stator assembly 2 has 54 winding slots 21 evenly spaced along its circumferential edge, and the outer rotor 3 has 48 magnets 6 evenly spaced on its inner circumferential wall, with a gap between adjacent magnets 6.

[0033] like Figure 5As shown, in this embodiment, there are four connecting rods 8, and both clamping brackets 9 are cross-shaped. The inner side of the clamping bracket 9 has a cross-shaped groove 10. The clamping bracket 9 is integrally formed by stamping metal material. In actual production, there can be three connecting rods 8, and both clamping brackets 9 are Y-shaped. The inner side of the clamping bracket 9 has a Y-shaped groove 10. The clamping bracket 9 is made of fiberglass or plastic material. The outer end of the clamping bracket 9 has a second fixing hole 91 for fasteners to pass through. The center of the clamping bracket 9 has a long positioning hole 92. The connecting rod 8 has a long adjusting hole 81. The inner end of the connecting rod 8 can be embedded into the groove at the outer end of the two grooves 10. By passing fasteners through the second fixing hole 91 and the adjusting hole 81 and locking them, the connecting rod 8 can be clamped and fixed by the two clamping brackets 9.

[0034] The outer end of the stator shaft 1 is a flat section, with both sides of the flat section being arc-shaped and having external threads. The flat section passes through the positioning hole 92. In this embodiment, all fasteners are bolts.

[0035] During assembly, the blade 4 is fixed to the blade angle 5 with bolts, then the blade angle 5 is sleeved on the shaft head 31, and then the nut is tightened on the external thread of the shaft head 31 to lock the blade angle 5. Disassembly only requires directional operation.

[0036] Example 2

[0037] like Figure 6 As shown, this embodiment is basically the same as the structure and principle of embodiment one. The difference is that in this embodiment, six fan-shaped positioning grooves 55 are provided at equal intervals on the outer end face of the blade corner 5. All the positioning grooves 55 form a circle. The bottom of the positioning groove 55 has a fixing blind hole 56 and a protruding arc-shaped snap-fit ​​strip 57. The inner end of the blade 4 is embedded in the positioning groove 55, and the snap-fit ​​strip 57 is embedded in the blade 4. The inner ends of all the blades 4 are pressed by a circular pressure plate 7. Then, fasteners pass through the pressure plate 7 and the blades 4 and pass through the fixing blind hole 56 to fix the blades 4 and the blade corner 5. In actual production, the number of positioning grooves 55 can be three or eight.

[0038] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0039] Although this document frequently uses terms such as stator shaft 1, stator assembly 2, winding slot 21, outer rotor 3, shaft head 31, strip slot 311, annular slot 312, first keyway 313, cover 32, third fixing hole 321, blade 4, blade angle 5, mounting hole 51, second keyway 52, rotating disk 53, mounting plate 54, first fixing hole 541, positioning slot 55, fixing blind hole 56, snap-fit ​​strip 57, magnet 6, pressure plate 7, connecting rod 8, adjusting hole 81, clamping bracket 9, second fixing hole 91, positioning hole 92, and slide groove 10, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A fan, comprising a stator shaft (1), a stator assembly (2), and an outer rotor (3), wherein the stator assembly (2) is located within the outer rotor (3), the inner end of the stator shaft (1) is fixedly connected to the stator assembly (2), and the outer end extends out of the rear end of the outer rotor (3), characterized in that, The center of the front end of the outer rotor (3) has a shaft head (31) that protrudes forward along the axial direction of the stator shaft (1), and a blade angle (5) for mounting blades (4) is detachably sleeved on the shaft head (31).

2. A fan according to claim 1, characterized in that, The outer rotor (3) includes a cover (32) cast from aluminum material at the front end. The cover (32) has a third fixing hole (321) at its center. The outer peripheral wall of the inner end of the shaft head (31) has several strip grooves (311) arranged axially and spaced apart along the shaft head (31) and at least one annular groove (312) arranged circumferentially along the shaft head (31). The inner end of the shaft head (31) is embedded in the third fixing hole (321). The cover (32) is partially embedded in the strip grooves (311) and the annular grooves (312) to fix the cover (32) and the shaft head (31) together.

3. A fan according to claim 1, characterized in that, The stator assembly (2) has 54 winding slots (21) evenly spaced along its circumferential edge, and the outer rotor (3) has 48 magnets (6) evenly spaced on its inner circumferential wall, with a gap between adjacent magnets (6).

4. A fan according to claim 1, 2, or 3, characterized in that, The outer end of the shaft head (31) has an external thread, and the middle of the shaft head (31) has a first keyway (313) that is elongated and arranged along the axial direction of the shaft head (31). The center of the blade angle (5) has a through mounting hole (51), and the wall of the mounting hole (51) has a second keyway (52) that is elongated and arranged along the axial direction of the shaft head (31).

5. A fan according to claim 4, characterized in that, The blade (5) includes a rotating disk (53) located in the middle and several mounting plates (54) arranged at equal intervals and radiating outwards from the rotating disk (53) as the center. The mounting hole (51) is located in the rotating disk (53), and the mounting plate (54) has several first fixing holes (541) for mounting the blade (4).

6. A fan according to claim 4, characterized in that, Several fan-shaped positioning grooves (55) are provided at equal intervals on the outer end face of the blade corner (5). All the positioning grooves (55) form a circle. The bottom of the positioning groove (55) has a fixing blind hole (56). The inner end of the blade (4) is embedded in the positioning groove (55). The blade (4) is fixedly connected to the blade corner (5) by fasteners passing through the blade (4) and through the fixing blind hole (56).

7. A fan according to claim 6, characterized in that, The bottom of the positioning groove (55) also has a protruding and arc-shaped snap-fit ​​strip (57). The snap-fit ​​strip (57) is embedded in the blade (4). The inner ends of all the blades (4) are pressed by a circular pressure plate (7). Fasteners pass through the pressure plate (7) and the blades (4) and are inserted into the fixing blind hole (56) to fix the blades (4) to the blade corner (5).

8. A fan according to claim 1, 2, or 3, characterized in that, The fan also includes several connecting rods (8) and two clamping brackets (9) that are both cross-shaped or Y-shaped. The inner side of the clamping bracket (9) has a cross-shaped or Y-shaped sliding groove (10). The outer end of the clamping bracket (9) has a second fixing hole (91) for fasteners to pass through. The center of the clamping bracket (9) has a long positioning hole (92). The connecting rod (8) has a long adjusting hole (81). The inner end of the connecting rod (8) can be embedded into the slots at the outer ends of the two sliding grooves (10). The connecting rod (8) can be clamped and fixed by the two clamping brackets (9) by fasteners passing through the second fixing hole (91) and the adjusting hole (81) and locking.

9. A fan according to claim 8, characterized in that, The outer end of the stator shaft (1) is a flat section, both sides of which are arc-shaped and external threads are provided on the arc shape. The flat section passes through the positioning hole (92).

10. A fan according to claim 8, characterized in that, The clamping bracket (9) is integrally formed from metal material by stamping, the clamping bracket (9) is made of fiberglass material, or the clamping bracket (9) is made of plastic material.

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