Magnetic transmission device of fan

Abstract

The utility model relates to a fan magnetic transmission device, which belongs to the technical field of fan transmission and comprises a motor and an impeller, and a motor shaft is in transmission connection with an impeller shaft through a magnetic device. The magnetic device comprises a motor shaft sleeve and an impeller shaft sleeve; a strong magnet mounting cylinder is arranged at the front end of the motor shaft sleeve and arranged on the outer side of the impeller shaft sleeve in a sleeving mode, the cross section of the inner wall of the strong magnet mounting cylinder is in a regular polygon shape, strong magnets A are installed on all faces of the inner wall of the strong magnet mounting cylinder, and N poles and S poles of the strong magnets A are distributed in a staggered mode. The outer wall of the impeller shaft sleeve is in a regular polygon shape, the number of the edges of the outer wall of the impeller shaft sleeve is the same as that of the edges of the inner wall of the strong magnet mounting cylinder, and strong magnets B are mounted on all faces of the outer wall of the impeller shaft sleeve; the strong magnet B and the strong magnet A correspond in position and are opposite in polarity; the impeller shaft sleeve is driven to rotate through attraction force and repulsive force generated by the strong magnet A to the strong magnet B, transmission of the motor and the impeller is achieved, the working intensity of maintenance personnel is relieved, and normal production of a workshop is guaranteed.

Description

Technical Field

[0001] This utility model relates to a magnetic transmission device for a fan, belonging to the field of fan transmission technology. Background Technology

[0002] A fan is a machine that converts the mechanical energy of a prime mover into gas energy for transporting or pressurizing gas. It is widely used in industry, construction, and environmental protection. A fan typically consists of a motor, a casing, and an impeller. The impeller is located inside the casing and is driven by the motor. The drive connection between the impeller and the motor can be direct-drive, belt-driven, or coupling-driven. Among these, coupling-driven fans are widely used due to their high transmission efficiency, reliability, ability to effectively transmit large amounts of power, and good operational stability.

[0003] However, coupling-driven fans rely on bolts with auger holes to align the two shafts and transmit torque by the bolt shanks bearing compression and shear. The bolts are prone to breakage and damage under shear force, requiring regular shutdowns for maintenance. This not only increases the labor intensity of maintenance personnel but also seriously affects the workshop's production efficiency. Utility Model Content

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a magnetic transmission device for a fan, which uses a magnetic transmission connection to connect the motor and the impeller, eliminating the need for regular shutdown for maintenance, reducing the labor intensity of maintenance personnel, and ensuring normal production in the workshop.

[0005] The magnetic transmission device for a wind turbine according to this utility model includes a motor and an impeller. The motor shaft and the impeller shaft are connected by a magnetic device. The magnetic device includes a motor bushing and an impeller bushing. The motor bushing is fixedly connected to the motor shaft, and the impeller bushing is fixedly connected to the impeller shaft. A strong magnet mounting cylinder is provided at the front end of the motor bushing. The strong magnet mounting cylinder is sleeved on the outside of the impeller bushing. The cross-section of the inner wall of the strong magnet mounting cylinder is a regular polygon with an even number of sides. A strong magnet A is installed on each surface of the inner wall of the strong magnet mounting cylinder, and the N poles and S poles of each strong magnet A are alternately distributed. The outer wall of the impeller bushing is a regular polygon with the same number of sides as the inner wall of the strong magnet mounting cylinder. A strong magnet B is installed on each surface of the outer wall of the impeller bushing. The strong magnets B and strong magnets A are positioned one-to-one and have opposite polarities.

[0006] The technical solution of this utility model is to provide a magnetic transmission device for a fan. By alternately setting strong magnets A and B, and making the corresponding strong magnets attract each other, when the motor drives the motor shaft sleeve to rotate, each strong magnet A rotates. The attractive and repulsive forces generated on the strong magnet B drive the impeller shaft sleeve to rotate, thereby making the impeller rotate, and realizing the transmission between the motor and the impeller.

[0007] Preferably, the motor bushing is keyed to the motor shaft, and the impeller bushing is keyed to the impeller shaft.

[0008] Preferably, the impeller is rotatably disposed within the impeller housing.

[0009] Preferably, both the motor and the impeller housing are fixed to the fan base.

[0010] Furthermore, a bearing seat is fixed on the fan base, and the impeller is rotatably connected to the fan base through the bearing seat.

[0011] The advantages of this utility model compared with the prior art are:

[0012] The magnetic transmission device for a fan described in this invention uses alternating strong magnets A and B, with the corresponding strong magnets attracting each other. When the motor drives each strong magnet A to rotate through the motor shaft sleeve, the attractive and repulsive forces generated by strong magnet A on strong magnet B drive the impeller shaft sleeve to rotate, thereby causing the impeller to rotate and realizing the transmission between the motor and the impeller. This invention eliminates the need for bolts to transmit torque, avoids the need for periodic shutdowns for maintenance, reduces the workload of maintenance personnel, and ensures normal production in the workshop. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a cross-sectional view of the magnetic device.

[0015] In the diagram: 1. Motor; 2. Motor shaft sleeve; 21. Strong magnet mounting cylinder; 3. Impeller shaft sleeve; 4. Impeller housing; 5. Impeller; 6. Bearing housing; 7. Fan base; 8. Strong magnet A; 9. Strong magnet B. Detailed Implementation

[0016] The present invention will be further described below with reference to specific embodiments.

[0017] However, the description of this utility model is only a structural or even functional description of the embodiments, and the scope of the utility model is not limited by the embodiments described herein.

[0018] For example, multiple embodiments may have various modifications and forms, and it should be understood that the scope of this utility model includes equivalents that can realize the technical concept.

[0019] like Figures 1-2As shown, this embodiment is achieved through the following technical solution: It includes a motor 1 and an impeller 5, with the motor shaft and impeller shaft connected by a magnetic device; the magnetic device includes a motor shaft sleeve 2 and an impeller shaft sleeve 3, with the motor shaft sleeve 2 fixedly connected to the motor shaft and the impeller shaft sleeve 3 fixedly connected to the impeller shaft; a strong magnet mounting cylinder 21 is provided at the front end of the motor shaft sleeve 2, and the strong magnet mounting cylinder 21 is sleeved on the outside of the impeller shaft sleeve 3. The inner wall cross-section of the strong magnet mounting cylinder 21 is a regular octagon, and strong magnets A8 are installed on each surface of the inner wall of the strong magnet mounting cylinder 21, with the N poles and S poles of each strong magnet A8 alternately distributed; the outer wall of the impeller shaft sleeve 3 is a regular octagon, and strong magnets B9 are installed on each surface of the outer wall of the impeller shaft sleeve 3; the positions of strong magnets B9 and strong magnets A8 correspond one-to-one, and their polarities are opposite.

[0020] In this embodiment, the motor bushing 2 is keyed to the motor shaft, and the impeller bushing 3 is keyed to the impeller shaft; the impeller 5 is rotatably mounted in the impeller housing 4; both the motor 1 and the impeller housing 4 are fixed to the fan base 7. A bearing seat 6 is fixed on the fan base 7, and the impeller 5 is rotatably connected to the fan base 7 through the bearing seat 6.

[0021] The working process of this utility model is as follows:

[0022] After being powered on, the motor 1 runs, driving the motor shaft sleeve 2 to rotate, and each strong magnet A8 to rotate. The attraction and repulsion forces generated by the strong magnet A8 on the strong magnet B9 drive the impeller shaft sleeve 3 to rotate, thereby causing the impeller 5 to rotate, thus realizing the transmission between the motor 1 and the impeller 5.

[0023] Of course, the above description is only a preferred embodiment of this utility model and should not be considered as limiting the scope of the embodiments of this utility model. This utility model is not limited to the above examples, and all equivalent changes and improvements made by those skilled in the art within the scope of this utility model should be included in the patent coverage of this utility model.

Claims

1. A magnetic drive for a fan, comprising: The motor (1) and the impeller (5) are connected by magnetic means, the magnetic means includes motor shaft sleeve (2) and impeller shaft sleeve (3), the motor shaft sleeve (2) is fixedly connected with the motor shaft, the impeller shaft sleeve (3) is fixedly connected with the impeller shaft, the motor shaft sleeve (2) is provided with strong magnet installation cylinder (21) at the front end, the strong magnet installation cylinder (21) is sleeved outside the impeller shaft sleeve (3), the inner wall of the strong magnet installation cylinder (21) is a regular polygon, the number of sides of the regular polygon is even, the strong magnet A (8) is installed on each surface of the inner wall of the strong magnet installation cylinder (21), the N pole and the S pole of each strong magnet A (8) are staggered, the outer wall of the impeller shaft sleeve (3) is a regular polygon, the number of sides of the outer wall of the impeller shaft sleeve (3) is the same as that of the inner wall of the strong magnet installation cylinder (21), and the strong magnet B (9) is installed on each surface of the outer wall of the impeller shaft sleeve (3), the strong magnet B (9) and the strong magnet A (8) are one-to-one corresponding and opposite in polarity.

2. The magnetic drive of a fan according to claim 1, wherein The motor shaft sleeve (2) is connected with the motor shaft by a key, and the impeller shaft sleeve (3) is connected with the impeller shaft by a key.

3. The magnetic drive of a fan according to claim 1, wherein The impeller (5) is rotatably arranged in the impeller shell (4).

4. The magnetic drive of a fan according to claim 3, wherein The motor (1) and the impeller shell (4) are fixed on the fan base (7).

5. The magnetic drive of a fan according to claim 4, wherein The fan base (7) is fixed with a bearing seat (6), and the impeller (5) is rotatably connected with the fan base (7) through the bearing seat (6).

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