Centrifugal fan

Abstract

The centrifugal fan comprises a fan stator and a fan rotor, the fan stator comprises an iron core, a plurality of winding grooves are formed in the iron core and used for forming coils and generating a magnetic field when powered on, the fan rotor comprises a special-shaped shaft core, a magnetic shoe inserting ring and an impeller, the magnetic shoe inserting ring and the impeller are connected with the special-shaped shaft core, and the special-shaped shaft core is sleeved with the magnetic shoe inserting ring. And the magnetic shoe insertion ring is used for inserting magnetic shoes / strips with different intensities and generating a magnetic field which is repulsive to the magnetic field generated by the coil, and the magnetic shoe insertion ring is sleeved with an iron core. The iron core forms the fan stator, the special-shaped shaft core, the magnetic shoe inserting ring and the impeller form the fan rotor, the coil on the iron core is electrified to generate a magnetic field, and the magnetic field and a magnetic field generated by the magnetic shoe / strip are opposite in magnetism and generate repulsive force, so that the magnetic shoe inserting ring and the special-shaped shaft core and the impeller which are connected with the magnetic shoe inserting ring are pushed to rotate, and a traditional magnetic sleeve is not needed. Torsion is reduced while lightweight design is achieved, the rotating speed and efficiency of the centrifugal fan are improved, and the centrifugal fan is simple in overall structure, ingenious in design and suitable for batch production.

Description

Technical Field

[0001] This utility model belongs to the field of fan technology, specifically relating to a centrifugal fan. Background Technology

[0002] With the development of technology, people have increasingly higher requirements for fans, especially in fields such as aviation, aerospace, and defense, where the performance and requirements for fans are even higher. Therefore, fan design is a very important aspect in these fields.

[0003] Traditional fan designs use screws to connect the stator core end and the end cover. The bolted end is fixed to the base by a mechanical structure, and the magnetic ring is designed on the outside of the core. In practical applications, this type of fan is not compact enough and the fasteners are prone to wear, which leads to a reduction in the efficiency of the entire fan. Utility Model Content

[0004] To address the technical problems existing in the prior art, the purpose of this utility model is to provide a centrifugal fan.

[0005] To achieve the above objectives and technical effects, the technical solution adopted by this utility model is as follows:

[0006] A centrifugal fan includes a fan stator and a fan rotor. The fan stator includes an iron core with several winding slots for forming coils and generating a magnetic field when energized. The fan rotor includes a shaped shaft core, a magnetic tile insert ring connected thereto, and an impeller. The shaped shaft core is fitted with a magnetic tile insert ring for inserting magnetic tiles / strips of different strengths to generate a magnetic field that magnetically repels the magnetic field generated by the coil. The magnetic tile insert ring is fitted with an iron core.

[0007] Furthermore, the irregularly shaped shaft core, magnetic tile insert ring, and iron core are respectively disposed inside the base, the impeller is disposed on the periphery of the base, and the base is disposed on the rear cover.

[0008] Furthermore, the base is a hollow structure with an open bottom and a stepped interior. The cavity formed by the base and the back cover contains a PCB circuit connected to the coil and several heat sinks for heat dissipation of the PCB circuit.

[0009] Furthermore, an upper bearing and a lower bearing are respectively provided at the upper and lower ends of the irregular shaft core. A magnetic tile insert ring is sleeved below the upper bearing and on the irregular shaft core. A shaft core limiting buckle is provided above the upper bearing. The two opposite sides of the inner wall of the shaft core limiting buckle are flat and are adapted to the rectangular surface opened on the upper part of the irregular shaft core.

[0010] Furthermore, the edge of the magnetic tile insert ring is uniformly provided with several square grooves for inserting magnetic tiles / strips of different strengths.

[0011] Furthermore, the iron core is evenly provided with several winding grooves for winding enameled wire to form a coil.

[0012] Furthermore, the irregularly shaped shaft core is mounted on a bearing chassis, which is located within a base.

[0013] Furthermore, the impeller edge is evenly provided with several balancing grooves.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This utility model discloses a centrifugal fan. The fan stator is formed by an iron core, which is located on the outside and fixed to the enclosure formed by the base. The rotor consists of an irregularly shaped shaft core, a magnetic tile insert ring connected to it, and an impeller. When the coil on the iron core is energized, it generates a magnetic field. This magnetic field is opposite to the magnetic field generated by the magnetic tile / strip, producing a repulsive force, thereby driving the magnetic tile insert ring and the irregularly shaped shaft core and impeller connected to it to rotate. It eliminates the need for a traditional magnetic sleeve, achieving a lightweight design while reducing the required torque, which is beneficial to improving the speed and efficiency of the centrifugal fan. The speed can be increased by 20-30%. Magnetic tiles / strips of different strengths can be inserted into the magnetic tile insert ring to achieve different performance requirements, making it more practical. Moreover, the overall structure is simple and compact, ingeniously designed, not easy to wear, and has low manufacturing cost, making it suitable for mass production. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0017] Figure 2 This is a three-dimensional structural diagram of the present invention after the impeller has been removed;

[0018] Figure 3 This is a three-dimensional structural diagram of the present invention after the impeller and base have been removed;

[0019] Figure 4 This is a schematic diagram of the installation of the bearing chassis and the irregular shaft core of this utility model;

[0020] Figure 5 This is a three-dimensional structural diagram of the irregular-shaped shaft core of this utility model. Detailed Implementation

[0021] The present invention will now be described in detail so that its advantages and features can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of the present invention.

[0022] The following provides a brief overview of one or more aspects to offer a basic understanding of them. This overview is not an exhaustive summary of all conceived aspects, nor is it intended to identify key or decisive elements of all aspects, nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form to prepare for the more detailed descriptions that follow.

[0023] like Figure 1-5 As shown, a centrifugal fan includes a magnetic tile insert ring 1, a shaft core limiting buckle 2, a bearing base 3, a shaped shaft core 4, an upper bearing 5, a lower bearing 6, an impeller 7, an iron core 8, a rear cover 9, and a base 10. The iron core 8 constitutes the fan stator. The base 10 is a hollow structure with an open bottom and steps. The iron core 8 is placed in the enclosed cavity formed by the base 10. Several winding slots are evenly arranged on the iron core 8 for winding enameled wire, etc., to form a coil and generate a magnetic field when energized. The shaped shaft core 4 and the magnetic tile insert ring 1 and the impeller 7 connected to it constitute the fan rotor. Several square slots 12 are evenly arranged on the edge of the magnetic tile insert ring 1 for inserting magnetic tiles / strips of different strengths to achieve different magnetic field performance requirements. The magnetic field generated by the magnetic tiles / strips is magnetically repulsive to the magnetic field generated by the coil.

[0024] In this utility model, a shaped shaft core 4 is installed on the bearing base 3. The bearing base 3 is installed inside the base 10. An upper bearing 5 and a lower bearing 6 are respectively provided at the upper and lower ends of the shaped shaft core 4. A magnetic tile insert ring 1 is sleeved below the upper bearing 5 and on the shaped shaft core 4. An iron core 8 is sleeved outside the magnetic tile insert ring 1. The shaped shaft core 4 is inserted into the through hole in the middle of the impeller 7, and a shaft core limiting buckle 2 is provided between the two. The shaft core limiting buckle 2 is located above the upper bearing 5. The two opposite sides of the inner wall of the shaft core limiting buckle 2 are flat and are adapted to the shaped shaft core 4 to play a limiting role. The magnetic tile insert ring 1, the bearing base 3, and the iron core 8 are located inside the base 10. The top of the shaped shaft core 4 can be partially exposed outside the base 10. The impeller 7 is set on the periphery of the base 10. The base 10 is set on the rear cover 9, and the cavity formed by the two is provided with a PCB circuit connected to the coil and several heat sinks 11 for heat dissipation of the PCB circuit.

[0025] In this invention, several balancing grooves are evenly arranged on the edge of the impeller 7.

[0026] This utility model features a specially designed irregular shaft core 4, which is riveted together with the impeller 7 and the magnetic tile insert ring 1, resulting in a more reliable structure. The irregular shaft core 4 has a rectangular surface 42 on its upper part, which is compatible with the shaft core limiting buckle 2.

[0027] The working principle of this utility model is as follows:

[0028] When the PCB circuit is energized, the coil formed by the enameled wire on the connected iron core 8 is also energized. This energization of the iron core 8 generates a magnetic field. This magnetic field is opposite to the magnetic field generated by the magnetic tile / strip inserted into the magnetic tile insert ring 1, resulting in a repulsive force. This force drives the magnetic tile insert ring 1, the connected irregular shaft core 4, and the impeller 7 to rotate. This design eliminates the need for a traditional magnetic sleeve, achieving a lightweight design while reducing the required torque. This improves the speed and efficiency of the centrifugal fan, increasing the speed by 20-30%.

[0029] The parts or structures not specifically described in this utility model can be made using existing technology or existing products, and will not be elaborated here.

[0030] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A centrifugal fan, characterized in that, The device includes a fan stator and a fan rotor. The fan stator includes an iron core with several winding slots for forming coils and generating a magnetic field when energized. The fan rotor includes a shaped shaft core, a magnetic tile insert ring connected to it, and an impeller. The shaped shaft core is fitted with a magnetic tile insert ring for inserting magnetic tiles / strips of different strengths to generate a magnetic field that repels the magnetic field generated by the coil. The magnetic tile insert ring is fitted with an iron core.

2. A centrifugal fan according to claim 1, characterized in that, The irregularly shaped shaft core, magnetic tile insert ring, and iron core are respectively disposed inside the base, the impeller is disposed on the periphery of the base, and the base is disposed on the rear cover.

3. A centrifugal fan according to claim 2, characterized in that, The base is a hollow structure with an open bottom and a stepped interior. The cavity formed by the base and the back cover contains a PCB circuit connected to the coil and several heat sinks for heat dissipation of the PCB circuit.

4. A centrifugal fan according to claim 1, characterized in that, The upper and lower ends of the irregular shaft core are respectively provided with an upper bearing and a lower bearing. A magnetic tile insert ring is sleeved below the upper bearing and on the irregular shaft core. A shaft core limiting buckle is provided above the upper bearing. The two opposite sides of the inner wall of the shaft core limiting buckle are flat and are adapted to the rectangular surface opened on the upper part of the irregular shaft core.

5. A centrifugal fan according to claim 1, characterized in that, The magnetic tile insert ring has several square grooves evenly arranged on its edge for inserting magnetic tiles / strips of different strengths.

6. A centrifugal fan according to claim 1, characterized in that, The iron core is evenly provided with several winding grooves for winding enameled wire to form a coil.

7. A centrifugal fan according to claim 1, characterized in that, The irregularly shaped shaft core is mounted on the bearing chassis, and the bearing chassis is located inside the base.

8. A centrifugal fan according to claim 1, characterized in that, The impeller edge is evenly provided with several balancing grooves.

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