Magnetic drive mute type axial flow fan

Abstract

The invention provides a magnetic drive mute type axial flow fan, and belongs to the field of fans. The axial flow fan solves the problem that in the operation process of an existing axial flow fan, mechanical friction noise is large. The magnetic drive mute type axial flow fan comprises a control system, an axial flow cylinder, a rotating part and a fan blade assembly, the rotating part is located in the axial flow cylinder, the magnetic drive mute type axial flow fan further comprises a magnetic drive mechanism and a guide blade assembly, flow guide assemblies are installed at the two ends of the axial flow cylinder, a plurality of through holes are formed in the side wall of the axial flow cylinder, and the fan blade assembly is located in the axial flow cylinder. The magnetic driving mechanism comprises a driving magnetic suspension gear, a driven magnetic suspension gear and an opening and closing motor set, the rotating part is movably connected with the fixing ring, and the opening and closing motor set is fixedly connected into the fixing ring and penetrates into the rotating part to be in magnetic coupling connection with the driving magnetic suspension gear. And the opening and closing motor group is controlled through the control system. The invention has the advantages of no contact and silence.

Description

Technical Field

[0001] The invention belongs to the field of fans and relates to an axial flow fan, in particular to a magnetically driven silent axial flow fan. Background Art

[0002] With the development of axial flow fan technology, axial flow fans have been widely used in various fields of society due to their advantages of large air volume and low pressure, such as factories, warehouses, offices, residences and other places where ventilation is required.

[0003] During the operation of axial flow fans, aerodynamic noises such as rotation noise and eddy current noise, as well as mechanical noise, will be generated. The conventional solution is to embed silent cotton inside the axial flow cylinder. Although silent cotton can effectively reduce aerodynamic noise, most axial flow fans rely on electricity or natural wind energy as a power source. When rotating, friction resistance will be generated due to their own structure, resulting in increased power consumption, high noise, and high heat generation, thereby reducing the working performance of the fan. Summary of the invention

[0004] The purpose of the present invention is to provide a magnetically driven silent axial flow fan to solve the above problems existing in the prior art.

[0005] The object of the present invention can be achieved through the following technical solutions: A magnetically driven silent axial flow fan, comprising a control system, an axial flow cylinder, a rotating member and a fan blade assembly, characterized in that the rotating member is located inside the axial flow and is arranged in a hollow cylindrical structure, the fan blade assembly is connected to the outside of the rotating member, and the rotating member rotates in the axial flow cylinder to drive the fan blade assembly to rotate and generate wind flow; The magnetically driven silent axial flow fan also includes a magnetic driving mechanism capable of driving the rotating member to rotate and a guide vane assembly for facilitating air intake and flow guidance; The guide vane assembly is fixedly connected to the inner wall of the axial flow cylinder and is provided for the magnetic drive mechanism to be fixedly installed so as to keep the magnetic drive mechanism running stably; Both ends of the axial flow cylinder are equipped with flow guide components for guiding the inlet and outlet air; A plurality of through holes for silencing and noise reduction are provided inside the side wall of the axial flow cylinder, and the through holes are arranged in a triangular structure and are filled with silencing cotton; The guide vane assembly includes a plurality of guide vanes and a fixed ring, wherein the plurality of guide vanes are evenly distributed and fixedly connected to the outer wall of the fixed ring and fixedly connected to the inner wall of the axial flow cylinder; The magnetic driving mechanism includes an active magnetic suspension gear fixed inside the rotating member, a driven magnetic suspension gear that can rotate, and an opening and closing motor group that can drive the driven magnetic suspension gear to rotate; The rotating member and the fixed ring are movably connected, the opening and closing motor group is fixedly connected to the inside of the fixed ring, and penetrates into the rotating member to be magnetically coupled with the active magnetic suspension gear, and the opening and closing motor group is controlled by the control system to ensure the transmission efficiency of the driven magnetic suspension gear.

[0006] In the above-mentioned magnetically driven silent axial flow fan, an isolation member is provided between the fixed ring and the rotating member to prevent impurities from entering the interior of the rotating member, and a connecting portion for reducing noise is axially extended toward the interior of the rotating member for the opening and closing motor unit to pass through.

[0007] In the above-mentioned magnetically driven silent axial flow fan, the fixed ring and the rotating part can be loosely fitted with clearance, or flexibly connected through a roller bearing structure, so as to facilitate the rotation of the fan blade assembly of the magnetically driven rotating part. The fixed ring is also connected to a plurality of heat dissipation fins for rapid cooling.

[0008] In the above-mentioned magnetically driven silent axial flow fan, the fan blade assembly includes a plurality of fan blades and a connecting ring, and the plurality of fan blades are fixedly connected to the outside of the connecting ring. The connecting ring is fixed to the outside of the rotating part, and can be an integrally formed structure with the rotating part, or a split fixed structure.

[0009] In the above-mentioned magnetically driven silent axial flow fan, the guide assembly includes a fixing fixed to the end of the axial flow cylinder and a guide ring for air volume diversion, the fixing and the guide ring are arranged as an integrally formed structure, and the guide ring is arranged in an external "eight" structure.

[0010] In the above-mentioned magnetically driven silent axial flow fan, the guide member and the fixing ring are made of lightweight and high-strength magnetic isolation material, and the guide components are respectively fixed to the two ends of the axial flow cylinder to facilitate air inlet and outlet guidance.

[0011] In the above-mentioned magnetically driven silent axial flow fan, the active magnetic suspension gear and the driven magnetic suspension gear are both made of high-performance permanent magnetic materials, and contactless transmission is achieved through magnetic coupling, and the transmission power is used to drive the rotating parts and fan blade assemblies to rotate.

[0012] In the above-mentioned magnetically driven silent axial flow fan, the interior of the rotating part cooperates with the guide vane assembly to form an installation cavity for the magnetic drive mechanism to be fixedly installed therein, and a driving magnetic field is formed by coupling the active magnetic suspension gear with the driven magnetic suspension gear.

[0013] In the above-mentioned magnetically driven silent axial flow fan, the axial flow cylinder, the fan blade assembly, the rotating member and the guide vane assembly are all made of magnetic isolation material.

[0014] Compared with the existing technology, this magnetically driven silent axial flow fan has the following advantages: 1. The internal meshing transmission of the active magnetic suspension gear and the driven magnetic suspension gear realizes contactless transmission between gears, avoids contact friction and wear in traditional mechanical transmission, significantly reduces noise and energy consumption, and the contactless design reduces component wear and failure rate, extends the service life of the fan, reduces maintenance costs, improves energy transfer efficiency, reduces energy loss, and makes the axial flow fan have a higher energy efficiency ratio; 2. The through holes in the side walls of the axial flow cylinder are arranged in a triangular structure, which can effectively improve the supporting strength of the axial flow cylinder and are filled with silent insulation cotton, which effectively improves the external pressure resistance while playing a silent noise reduction function. Combined with the connecting part on the isolation part, it further reduces the operating noise of the opening and closing motor group, achieving the purpose of silent noise reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the magnetically driven silent axial flow fan.

[0016] Figure 2 It is a schematic diagram of the partial cross-sectional structure of the magnetically driven silent axial flow fan.

[0017] Figure 3 It is a schematic diagram of the internal cross-sectional structure of the magnetically driven silent axial flow fan.

[0018] In the figure, 1. axial flow cylinder; 2. rotating part; 3. through hole; 4. silent insulation cotton; 5. guide vane; 6. fixing ring; 7. active magnetic levitation gear; 8. driven magnetic levitation gear; 9. opening and closing motor group; 10. isolation part; 11. heat dissipation fin; 12. fan blade; 13. connecting ring; 14. fixing part; 15. guide ring; 16. installation cavity. DETAILED DESCRIPTION

[0019] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0020] like Figure 1 , Figure 2 , Figure 3As shown, the magnetically driven silent axial flow fan comprises a control system, an axial flow cylinder 1, a rotating member 2 and a fan blade assembly. The rotating member 2 is located inside the axial flow and is arranged in a hollow cylindrical structure. The fan blade assembly is connected to the outside of the rotating member 2. The rotating member 2 rotates in the axial flow cylinder 1 to drive the fan blade assembly to rotate and generate wind flow. The magnetically driven silent axial flow fan also comprises a magnetic driving mechanism that can drive the rotating member 2 to rotate and a guide vane assembly that is convenient for air intake and flow guidance. The guide vane assembly is fixedly connected to the inner wall of the axial flow cylinder 1 and is fixedly installed by the magnetic driving mechanism to maintain the stable operation of the magnetic driving mechanism. The two ends of the axial flow cylinder 1 are equipped with guide assemblies that are convenient for air intake and air outlet guidance. The side wall of the axial flow cylinder 1 is provided with a plurality of The through hole 3 is arranged in a triangular structure, and the interior thereof is filled with silent insulation cotton 4. The guide vane assembly includes a plurality of guide vanes 5 and a fixed ring 6. The plurality of guide vanes 5 are evenly distributed and fixedly connected to the outer wall of the fixed ring 6, and are fixedly connected to the inner wall of the axial flow cylinder 1. The magnetic drive mechanism includes an active magnetic suspension gear 7 fixed to the inside of the rotating part 2, a driven magnetic suspension gear 8 that can rotate, and an opening and closing motor group 9 that can drive the driven magnetic suspension gear 8 to rotate. The rotating part 2 is movably connected to the fixed ring 6. The opening and closing motor group 9 is fixedly connected to the inside of the fixed ring 6, and penetrates into the inside of the rotating part 2 to be magnetically coupled with the active magnetic suspension gear 7, and the opening and closing motor group 9 is controlled by the control system, thereby ensuring the transmission efficiency of the driven magnetic suspension gear 8.

[0021] How it works When the fan is working, the opening and closing motor group 9 drives the driven magnetic levitation gear 8 to rotate, and is magnetically coupled with the active magnetic levitation gear 7. Since the active magnetic levitation gear 7 is fixed inside the rotating part 2, the principle of magnetic poles repelling each other is utilized to make the active magnetic levitation gear 7 rotate and drive the fan blade assembly to rotate. The magnetic drive mode offsets part of the friction resistance when the fan is working, reduces energy loss, improves rotation efficiency, and reduces the friction noise of mechanical transmission. At the same time, in conjunction with the side wall structure of the axial flow cylinder 1, the silent insulation cotton 4 and the isolation member 10 structural design, the mechanical noise and aerodynamic noise of the opening and closing motor group 9 can be effectively reduced and silenced step by step, achieving the purpose of silencing and noise reduction to a great extent.

[0022] To further elaborate, in order to prevent other impurities from entering the rotating member 2 and affecting its magnetic field, an isolating member 10 for preventing impurities from entering the rotating member 2 is further provided between the fixed ring 6 and the rotating member 2, and a connecting portion for the opening and closing motor group 9 to pass through and having noise reduction extends axially toward the inside of the rotating member 2. The isolating member 10 can effectively prevent impurities from entering the rotating member 2 and affecting its magnetic field. At the same time, the connecting portion can be made of magnetic isolation material to prevent the opening from being damaged. To elaborate further, in order to achieve magnetically driven contactless transmission and reduce the noise of mechanical friction, the fixed ring 6 and the rotating part 2 can be fitted with clearance or flexibly connected through a roller bearing structure to facilitate the rotation of the fan blade assembly of the magnetically driven rotating part 2. A plurality of heat dissipation fins 11 for rapid cooling are also connected to the fixed ring 6.

[0023] To further elaborate, in order to achieve synchronous rotation with the rotating part 2, the fan blade assembly includes a plurality of fan blades 12 and a connecting ring 13. The plurality of fan blades 12 are fixedly connected to the outside of the connecting ring 13. The connecting ring 13 is fixed to the outside of the rotating part 2 and can be an integrally formed structure with the rotating part 2, or a split fixed structure.

[0024] To further elaborate, in order to achieve air inlet and outlet guidance, the guide assembly includes a fixing part 14 fixed to the end of the axial flow tube 1 and a guide ring 15 for air volume guidance. The fixing ring 6 and the guide member are arranged as an integrally formed structure, and the guide ring 15 is arranged in an external "eight" structure. The guide ring 15 and the fixing part 14 are made of lightweight and high-strength magnetic isolation material. The guide assembly is respectively fixed to the two ends of the axial flow tube 1 to facilitate air inlet and outlet guidance.

[0025] To further elaborate, in order to achieve stable contactless transmission, the active magnetic levitation gear 7 and the driven magnetic levitation gear 8 are both made of high-performance permanent magnetic materials, and contactless transmission is achieved through magnetic coupling, and the transmission power is used to drive the rotating part 2 and the fan blade assembly to rotate. The active magnetic levitation gear 7 and the driven magnetic levitation gear 8 are designed as an internal meshing structure, wherein the number of the driven magnetic levitation gear 8 and the opening and closing motor group 9 is 2, and they are arranged in a corresponding structure to ensure the stability of the transmission. The interior of the rotating part 2 cooperates with the guide vane assembly to form an installation cavity 16 for fixed installation of the magnetic drive mechanism, and a driving magnetic field is formed by coupling the active magnetic levitation gear 7 with the driven magnetic levitation gear 8.

[0026] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0027] Although more terms are used in this article, it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A magnetically driven silent axial flow fan, comprising a control system, an axial flow cylinder (1), a rotating member (2) and a fan blade assembly, characterized in that: The rotating member (2) is located inside the axial flow and is arranged in a hollow cylindrical structure. The fan blade assembly is connected to the outside of the rotating member (2). The rotating member (2) rotates inside the axial flow cylinder (1), driving the fan blade assembly to rotate and generate wind flow. The magnetically driven silent axial flow fan also includes a magnetic driving mechanism capable of driving the rotating member (2) to rotate and a guide vane assembly for facilitating air intake and flow guidance; The guide vane assembly is fixedly connected to the inner wall of the axial flow cylinder (1) and is provided for the magnetic drive mechanism to be fixedly installed, so as to maintain stable operation of the magnetic drive mechanism; Both ends of the axial flow cylinder (1) are provided with flow guide components for facilitating the flow of inlet and outlet air; A plurality of through holes (3) for reducing noise are provided inside the side wall of the axial flow cylinder (1); the through holes (3) are arranged in a triangular structure and are filled with soundproofing cotton (4); The guide vane assembly comprises a plurality of guide vanes (5) and a fixing ring (6); the plurality of guide vanes (5) are evenly distributed and fixedly connected to the outer wall of the fixing ring (6), and are fixedly connected to the inner wall of the axial flow cylinder (1); The magnetic drive mechanism comprises an active magnetic suspension gear (7) fixed inside the rotating member (2), a driven magnetic suspension gear (8) that can rotate, and an opening and closing motor group (9) that can drive the driven magnetic suspension gear (8) to rotate; The rotating member (2) and the fixed ring (6) are movably connected, the opening and closing motor group (9) is fixedly connected to the inside of the fixed ring (6), and penetrates into the inside of the rotating member (2) to be magnetically coupled with the active magnetic suspension gear (7), and the opening and closing motor group (9) is controlled by a control system, thereby ensuring the transmission efficiency of the driven magnetic suspension gear (8).

2. A magnetically driven silent axial flow fan according to claim 1, characterized in that: An isolating member (10) is also provided between the fixed ring (6) and the rotating member (2) for preventing impurities from entering the interior of the rotating member (2), and a connecting portion for the opening and closing motor group (9) to pass through and for reducing noise is axially extended toward the interior of the rotating member (2).

3. The magnetically driven silent axial flow fan according to claim 1, characterized in that: The fixing ring (6) and the rotating member (2) can be loosely fitted with clearance, or movably connected via a roller bearing structure, so as to facilitate magnetically driving the fan blade assembly of the rotating member (2) to rotate. The fixing ring (6) is also connected to a plurality of heat dissipation fins (11) for rapid cooling.

4. The magnetically driven silent axial fan according to claim 1, characterized in that: The fan blade assembly comprises a plurality of fan blades (12) and a connecting ring (13); the plurality of fan blades (12) are fixedly connected to the outside of the connecting ring (13); the connecting ring (13) is fixed to the outside of the rotating member (2), and can be an integrally formed structure or a split fixed structure with the rotating member (2).

5. The magnetically driven silent axial fan according to claim 1, characterized in that: The flow guide assembly comprises a fixing ring (6) fixed to the end of the axial flow cylinder (1) and a flow guide ring (15) for guiding the air volume, the fixing member (14) and the flow guide ring (15) are arranged as an integrally formed structure, and the flow guide ring (15) is arranged in an outer "eight" structure.

6. A magnetically driven silent axial flow fan according to claim 5, characterized in that: The guide ring (15) and the fixing member (14) are made of lightweight and high-strength magnetic isolation material, and the guide components are respectively fixed to the two ends of the axial flow cylinder (1) to facilitate air inlet and outlet guidance.

7. The magnetically driven silent axial flow fan according to claim 1, characterized in that: The active magnetic suspension gear (7) and the driven magnetic suspension gear (8) are both made of high-performance permanent magnetic material, and achieve contactless transmission through magnetic coupling, and transmit power to drive the rotating member (2) and the fan blade assembly to rotate.

8. The magnetically driven silent axial flow fan according to claim 1, characterized in that: The interior of the rotating member (2) cooperates with the guide vane assembly to form an installation cavity (16) for fixing and installing the magnetic drive mechanism therein, and a driving magnetic field is formed by coupling the active magnetic suspension gear (7) with the driven magnetic suspension gear (8).

9. The magnetically driven silent axial flow fan according to claim 1, characterized in that: The axial flow cylinder (1), the fan blade assembly, the rotating member (2) and the guide vane assembly are all made of magnetic isolation material.

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