Straight-through type high-speed fan

Abstract

The utility model discloses a straight-through type high-speed fan which comprises an aluminum machine shell and an aluminum rear end cover, the front portion of the rear end cover is connected with the rear portion of the machine shell, the hollowed-out rear end cover is provided with an air outlet and a wire outlet hole, air flow can be emitted out through the air outlet, the front portion of the machine shell is provided with a front support integrally formed with the machine shell in a die-casting mode, and the front support and the rear end cover are each provided with a bearing chamber. A rotor assembly and a stator assembly are arranged in the machine shell. An inducer is arranged at the front part of the front bracket, a rotatable movable impeller is arranged at the front part of the inducer, and the movable impeller is connected with a motor shaft; a fan cover is arranged on the front portion of the machine shell, an air inlet is formed in the front portion of the fan cover, and the rear portion of the fan cover is connected with According to the utility model, the casing and the front bracket are molded into a whole through die casting, the matching dimensional tolerance of parts can be ensured through machining, the concentricity dimensional accuracy of bearings arranged at the two ends of the motor shaft is ensured, the vibration is smaller when the fan runs at a high speed, and the service life of the fan is prolonged; and the casing and the rear end cover are made of aluminum materials, so that the heat dissipation capability of the fan is remarkably improved, and the service life of the fan is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, specifically a direct-flow high-speed fan. Background Technology

[0002] High-speed fans are widely used in various fields, such as hair dryers, hand dryers for bathroom drying, and pet blow dryers. However, existing fans have the following problems.

[0003] 1. Both the front bracket and the rear cover contain a bearing housing that mates with the bearing. The bearing housing is an embedded bushing. The bushing is injection molded together with the rear cover, the front bracket, and the hexagonal nut post, resulting in high component manufacturing costs. After injection molding, the parts exhibit significant deformation and dimensional fluctuations, making it difficult to control the locating dimensions.

[0004] 2. The rear cover and front bracket are made of plastic. Plastic parts have poor heat exchange performance with air. The fan can only dissipate heat through the airflow generated inside itself. The temperature of the fan increases during operation, which shortens the service life of the fan.

[0005] 3. During assembly, the concentricity of the mating stop between the front bracket and the rear cover is poor. When the fan runs at high speed, the overall vibration of the fan is large, which causes great wear on the bearings and shortens the service life of the fan. Summary of the Invention

[0006] This utility model addresses the aforementioned technical problems by providing a direct-flow high-speed fan that improves the fan's heat dissipation capacity, enhances its performance, and extends its service life.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a straight-through high-speed fan, including an aluminum casing and an aluminum rear end cover, the front part of the rear end cover is connected to the rear part of the casing, the hollowed-out rear end cover is provided with an air outlet and a wire outlet for airflow, the front part of the casing is provided with a front bracket integrally formed by die casting, both the front bracket and the rear end cover are provided with bearing chambers, the casing contains a rotor assembly and a stator assembly; the rotor assembly includes a motor shaft, a rotor core mounted on the motor shaft and a magnet mounted on the outside of the rotor core, both ends of the motor shaft are connected to bearings, the bearings at both ends of the motor shaft are respectively located in the bearing chambers of the front bracket and the rear end cover; the stator assembly includes a stator core, the stator core is connected to the inner wall of the casing; the front part of the front bracket is provided with a guide wheel, the front part of the guide wheel is provided with a rotatable impeller, the impeller is connected to the motor shaft; the front part of the casing is provided with a fan shroud, the front part of the fan shroud is provided with an air inlet, the rear part of the fan shroud is connected to the casing.

[0008] To optimize the above technical solution, the present invention also includes the following improved technical solutions.

[0009] The bearing housing of the aforementioned rear end cover is equipped with a corrugated gasket, and the bearing at the rear end of the motor shaft mates with the corrugated gasket.

[0010] The aforementioned rotor assembly also includes a dynamic balancing block and a magnet sheath. The motor shaft is equipped with a dynamic balancing block, and the magnet is equipped with a magnet sheath on its exterior.

[0011] The stator assembly also includes an upper frame and a lower frame. The stator core is installed in the upper frame and the lower frame, and after the coil is wound, it is connected to the inner wall of the housing. The upper frame is equipped with a terminal block, and the wires on the terminal block are led out through the wire outlet hole of the rear cover.

[0012] The aforementioned guide vane is connected to the front bracket by short screws. A T-shaped pad is provided between the guide vane and the moving impeller. A first washer and a nut are provided at the front of the moving impeller.

[0013] Compared with the prior art, the straight-through high-speed fan of this utility model has a casing and front support die-cast as one piece. Through machining, the dimensional tolerance of the parts can be guaranteed, and the concentricity of the bearings installed at both ends of the motor shaft can be guaranteed. The fan vibrates less when running at high speed. The casing and rear end cover are made of aluminum material, which significantly improves the heat dissipation capacity of the fan and increases the service life of the fan. Attached Figure Description

[0014] Figure 1 This is an exploded three-dimensional structural diagram of this embodiment.

[0015] Figure 2 This is a cross-sectional view of this embodiment. Detailed Implementation

[0016] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0017] Figures 1 to 2 The diagram shown is a structural schematic of this utility model.

[0018] The attached figures are labeled as follows: housing 1, mounting part 1a, front bracket 2, rear end cover 3, air outlet 3a, cable outlet 3b, bearing chamber 4, wave-shaped gasket 5, long screw 7, rotor assembly 8, stator assembly 9, motor shaft 10, bearing 11, rotor core 12, magnet 13, magnet sheath 14, dynamic balance block 15, stator core 16, upper frame 17, lower frame 18, terminal block 19, guide vane 20, short screw 21, T-shaped pad 22, moving impeller 23, first gasket 24, nut 25, fan cover 26, air inlet 26a, cable clip 27.

[0019] The present invention relates to a direct-flow high-speed fan, comprising a casing 1 and a rear end cover 3. When the fan is running, the rotating impeller 23 draws outside air into the fan along the shroud 26. The airflow first passes through the stator assembly 9 to dissipate heat from the windings, and finally the airflow is dissipated through the rear end cover 3, thereby improving the fan's heat dissipation capacity and extending the fan's service life.

[0020] like Figure 1 and Figure 2 As shown, the front of the housing 1 is provided with a front bracket 2, and the housing 1 and the front bracket 2 are die-cast into one piece. The rear of the housing 1 is provided with a rear end cover 3, which has a hollow structure and is provided with an air outlet 3a and a cable outlet 3b for airflow. The rear of the housing 1 has a mounting part 1a, and the front of the rear end cover 3 has a groove that fits the mounting part 1a. The front of the rear end cover 3 and the rear of the housing 1 are assembled together by the mounting part 1a and the groove. The rear end cover 3 and the housing 1 are then locked together by a long screw 7. The rear end cover 3 is used to fix the lead wire by cooperating with the cable clip 27.

[0021] The housing 1 contains a rotor assembly 8 and a stator assembly 9. The rotor assembly 8 includes a motor shaft 10, a rotor core 12, a magnet 13, a magnet sheath 14, and a dynamic balancing block 15. Both ends of the motor shaft 10 are connected to bearings 11. The front bracket 2 and the rear cover 3 are both provided with bearing chambers 4. The front bearing 11 of the motor shaft 10 is assembled into the bearing chamber 4 in the front bracket 2. The bearing chamber 4 in the rear cover 3 is provided with a wave-shaped shim 5. The wave-shaped shim 5 cooperates with the rear bearing 11 of the motor shaft 10 and is assembled into the bearing chamber 4 in the rear cover 3.

[0022] The housing 1 and the rear end cover 3 are machined to ensure the dimensional tolerances of the parts and to guarantee the concentricity accuracy of the bearings 11 installed at both ends of the motor shaft 10. This results in less vibration of the entire machine when the fan is running at high speed, thereby increasing the service life of the fan. At the same time, since both the housing 1 and the rear end cover 3 are made of aluminum, the metal shell is stably grounded, improving the reliability of the fan installation.

[0023] The rotor core 12 and dynamic balancing block 15 are mounted on the motor shaft 10. The magnet 13 is mounted outside the rotor core 12, and the magnet sheath 14 is mounted outside the magnet 13. The dynamic balancing block 15 prevents the magnet 13 from vibrating significantly during rotation. When assembling the rotor core 12 with the magnet 13 and the magnet 13 with the magnet sheath 14, glue is filled in between and heated to cure.

[0024] The stator assembly 9 includes a stator core 16, an upper frame 17, a lower frame 18, and a terminal block 19. The stator core 16 is installed inside the upper frame 17 and the lower frame 18. After the winding process according to the design parameters is completed, it is assembled with the inner wall of the housing 1 by heating. The terminal block 19 is installed on the upper frame 17, and the wires on the terminal block 19 are led out through the wire outlet hole 3b of the rear cover 3.

[0025] As the stator core 16, which is wound with coils, carries a regularly changing current, the stator core 16 generates an induced magnetic field that acts on the magnet 13, thereby driving the rotor assembly 8 to rotate relative to the stator assembly 9.

[0026] A guide vane 20 is provided at the front of the front bracket 2, and the guide vane 20 is installed together with the front bracket 2 by short screws 21. A rotatable impeller 23 is provided at the front of the guide vane 20, and the impeller 23 is installed at the front end of the motor shaft 10. A T-shaped shim 22 is installed between the guide vane 20 and the impeller 23, and the T-shaped shim 22 is fitted onto the motor shaft 10. A nut 25 is provided at the front of the impeller 23, and a first washer 24 is installed between the nut 25 and the impeller 23. The nut 25 fixes the impeller 23 onto the motor shaft 10. A fan shroud 26 is provided at the front of the housing 1, and the rear of the fan shroud 26 is assembled with the housing 1. An air inlet 26a is provided at the front of the fan shroud 26 for airflow to enter.

[0027] When the fan is running, the rotating impeller 23 draws outside air into the fan through the air inlet 26a of the fan shroud 26. The guide vane 20 guides the airflow through the stator assembly 9 to dissipate heat from the coil windings. Since both the casing 1 and the rear cover 3 are made of aluminum, a material with excellent heat dissipation properties, the fan's heat dissipation capacity is improved. This avoids short circuits caused by aging of the enameled wire coating due to excessive temperature and evaporation of grease from the bearing 11 due to excessive temperature, thus improving fan performance, extending its service life, and reducing the fan's heat dissipation requirements in the installation environment, making it more widely applicable.

[0028] The preferred embodiment of this utility model has been described, and various changes or modifications made by those skilled in the art will not depart from the scope of this utility model.

Claims

1. A straight-through high-speed fan, comprising an aluminum casing (1) and an aluminum rear end cover (3), characterized in that: The front part of the rear end cover (3) is connected to the rear part of the housing (1). The hollowed-out rear end cover (3) is provided with an air outlet (3a) and a wire outlet (3b) for airflow to dissipate. The front part of the housing (1) is provided with a front bracket (2) integrally formed by die casting. Both the front bracket (2) and the rear end cover (3) are provided with bearing chambers (4). The housing (1) is provided with a rotor assembly (8) and a stator assembly (9). The rotor assembly (8) includes a motor shaft (10), a rotor core (12) mounted on the motor shaft (10), and a magnet (13) mounted on the outside of the rotor core (12). The motor shaft (10) has two... Each end is connected to a bearing (11), and the bearings (11) at both ends of the motor shaft (10) are respectively set in the bearing chambers (4) of the front bracket (2) and the rear cover (3); the stator assembly (9) includes a stator core (16), which is connected to the inner wall of the housing (1); the front of the front bracket (2) is provided with a guide wheel (20), and the front of the guide wheel (20) is provided with a rotatable impeller (23), which is connected to the motor shaft (10); the front of the housing (1) is provided with a shroud (26), the front of the shroud (26) is provided with an air inlet (26a), and the rear of the shroud (26) is connected to the housing (1).

2. The straight-through high-speed fan according to claim 1, characterized in that: The bearing chamber (4) of the rear cover (3) is provided with a wave-shaped gasket (5), and the bearing (11) at the rear end of the motor shaft (10) is engaged with the wave-shaped gasket (5).

3. The straight-through high-speed fan according to claim 2, characterized in that: The rotor assembly (8) also includes a dynamic balancing block (15) and a magnet sheath (14). The motor shaft (10) is provided with a dynamic balancing block (15), and the magnet (13) is provided with a magnet sheath (14).

4. The straight-through high-speed fan according to claim 3, characterized in that: The stator assembly (9) also includes an upper frame (17) and a lower frame (18). The stator core (16) is installed in the upper frame (17) and the lower frame (18). After the coil is wound, it is connected to the inner wall of the housing (1). The upper frame (17) is provided with a terminal block (19). The wires on the terminal block (19) are led out through the wire outlet hole (3b) of the rear cover (3).

5. The straight-through high-speed fan according to claim 4, characterized in that: The guide wheel (20) is connected to the front bracket (2) by a short screw (21). A T-shaped pad (22) is provided between the guide wheel (20) and the moving impeller (23). A first washer (24) and a nut (25) are provided at the front of the moving impeller (23).

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