An industrial fan based on a low-speed, high-torque magnetic motor

Abstract

The present invention relates to the field of industrial equipment technology, and specifically to an industrial fan based on a low-speed, high-torque magnetically adjustable motor, the industrial fan comprising: a rotating assembly with an internal accommodation space, a magnetically adjustable motor arranged in the accommodation space, and fan blades fixed to the outside of the rotating assembly; the magnetically adjustable motor comprising: a motor stator and a motor rotor sleeved on the outside of the motor stator, an air gap formed between the motor stator and the motor rotor, the motor stator comprising a stator iron yoke, a coil winding wound on the stator iron yoke, and a stator magnetically adjustable block fixed to the end of the stator iron yoke, the motor rotor comprising a rotor iron yoke and a rotor permanent magnet assembly attached to the inner side of the rotor iron yoke, the stator magnetically adjustable block and the rotor permanent magnet assembly being radially magnetized. In the above manner, compared with traditional industrial fans, the present invention can directly output torque to drive the fan blades to operate, increase magnetic flux through the stator magnetically adjustable block, improve motor torque output, reduce mechanical loss, and improve motor efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial equipment, and in particular to an industrial fan based on a low-speed, high-torque magnetically adjustable motor. Background Art

[0002] Existing industrial fans typically use reduction gear motors, which are complex and difficult to maintain. These motors use a reduction gearbox to convert the speed and torque of a conventional motor. The presence of a gearbox not only increases the system size but also inevitably introduces vibration and noise due to mechanical friction between the gears, and increases lubrication and maintenance costs. Summary of the Invention

[0003] The present invention provides an industrial fan based on a low-speed, high-torque magnetically modulated motor, which can directly output torque to drive fan blades to operate, thereby reducing mechanical losses and improving motor efficiency.

[0004] To solve the above technical problems, the present invention adopts a technical solution: to provide an industrial fan based on a low-speed, high-torque, magnetically adjustable motor, comprising:

[0005] A rotating assembly with an accommodation space inside, a magnetic modulation motor arranged in the accommodation space, and fan blades fixed on the outside of the rotating assembly;

[0006] The magnetic tuning motor includes: a motor stator and a motor rotor sleeved on the outside of the motor stator, an air gap is formed between the motor stator and the motor rotor, the motor stator includes a stator iron yoke, a coil winding wound on the stator iron yoke, and a stator magnetic tuning block fixed to the end of the stator iron yoke, the motor rotor includes a rotor iron yoke and a rotor permanent magnet assembly attached to the inside of the rotor iron yoke, and the stator magnetic tuning block and the rotor permanent magnet assembly are both radially magnetized.

[0007] According to one embodiment of the present invention, the rotating assembly includes: a fixed part with open ends and a hollow interior, a fixed shaft arranged in the fixed part, and a first shell and a second shell arranged at both ends of the fixed part, the fixed shaft passes through the center of the motor stator, the outer side of the rotor yoke is fixedly connected to the inner wall of the fixed part, one end of the fixed shaft passes through the first shell and fixes the first shell to one end of the fixed part, and the other end of the fixed shaft passes through the second shell and fixes the second shell to the other end of the fixed part.

[0008] According to one embodiment of the present invention, a protrusion partially extending along the extension direction of the fan blade is provided on the peripheral side of the fixing portion, and one end of the fan blade abuts against and is fixedly connected to the end face of the protrusion.

[0009] According to one embodiment of the present invention, the fixed shaft includes a shaft body fixedly connected to the motor stator, a first connecting end located at one end of the shaft body, and a second connecting end located at the other end of the shaft body, the first connecting end is fixedly connected to the first shell, and the second connecting end is fixedly connected to the second shell.

[0010] According to one embodiment of the present invention, a through hole for connecting a cable is provided on the fixed shaft.

[0011] According to one embodiment of the present invention, the rotor permanent magnet assembly includes a plurality of bar-shaped permanent magnets uniformly distributed along the circumferential direction, and magnetization directions of two adjacent bar-shaped permanent magnets are opposite.

[0012] According to one embodiment of the present invention, two stator teeth are provided at the end of the stator yoke, a stator tooth slot is formed between the stator teeth, and the stator magnetic tuning block is nested in the stator tooth slot.

[0013] According to one embodiment of the present invention, the rotating assembly is made of non-magnetic material.

[0014] According to one embodiment of the present invention, the stator yoke and the rotor yoke are made of magnetic conductive material.

[0015] The beneficial effects of the present invention are as follows: the motor stator of the magnetically adjustable motor is on the inside and the motor rotor is on the outside, which makes it convenient for the motor rotor to directly drive the fan blades to rotate. Compared with the traditional reduction box motor fan, the industrial fan increases the magnetic flux through the stator magnetic adjustment block, improves the motor torque output, reduces mechanical loss, and improves the motor efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 Schematic diagram of the exploded structure of an industrial fan based on a low-speed, high-torque magnetically modulated motor according to an embodiment of the present invention;

[0018] Figure 2 3D schematic diagram of the industrial fan based on a low-speed, high-torque magnetically modulated motor according to an embodiment of the present invention;

[0019] Figure 3 1. A side view of an industrial fan based on a low-speed, high-torque, magnetically modulated motor according to an embodiment of the present invention;

[0020] Figure 4 yes Figure 3Section view along AA direction. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0022] The terms "first", "second" and "third" in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" and "third" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise clearly and specifically defined. All directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0023] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute a separate or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0024] Figure 1 This is a schematic diagram of the exploded structure of an industrial fan based on a low-speed, high-torque magnetic motor according to an embodiment of the present invention. Figure 1 The industrial fan 100 includes a rotating assembly 10 having an internal accommodation space 11, a magnetically adjustable motor 20 disposed within the accommodation space 11, and fan blades 30 fixed to the outside of the rotating assembly 10. The magnetically adjustable motor 20 includes a motor stator 21 and a motor rotor 22 sleeved outside the motor stator 21, with an air gap formed between the motor stator 21 and the motor rotor 22.

[0025] See Figure 4The motor stator 21 includes a stator yoke 211, a coil winding 212 wound on the stator yoke 211, and a stator magnetic adjustment block 213 fixed to the end of the stator yoke 211. The stator magnetic adjustment block 213 is radially magnetized. Furthermore, the stator yoke 211 is made of a magnetic conductive material. Furthermore, the stator yoke 211 is made of laminated silicon steel sheets. The stator yoke 211 is provided with a central axis hole 2111. Two stator teeth 2112 are provided at the end of the stator yoke 211, and a stator tooth slot is formed between the stator teeth 2112. The stator magnetic adjustment block 213 is nested in the stator tooth slot.

[0026] See Figure 4 The motor rotor 22 includes a rotor yoke 221 and a rotor permanent magnet assembly 222 attached to the inner side of the rotor yoke 221. The rotor permanent magnet assembly 222 is radially magnetized. The rotor yoke 221 is made of a magnetically conductive material. Furthermore, the rotor yoke 221 is made of laminated silicon steel sheets. The rotor permanent magnet assembly 222 includes a plurality of bar-shaped permanent magnets 2221 evenly distributed along the circumference, with adjacent bar-shaped permanent magnets 2221 having opposite magnetization directions.

[0027] See Figure 1 、 Figure 3 and Figure 4 The rotating assembly 10 is made of a non-magnetic material. Furthermore, the rotating assembly 10 includes: a fixed portion 12 with both ends open and a hollow interior, a fixed shaft 13 arranged in the fixed portion 12, a first shell 14 and a second shell 15 arranged at both ends of the fixed portion 12, the fixed shaft 13 passes through the central shaft hole 2111 of the motor stator, the outer side of the rotor iron yoke 221 is fixedly connected to the inner wall of the fixed portion 12, one end of the fixed shaft 13 passes through the first shell 14 and fixes the first shell 14 to one end of the fixed portion 12, and the other end of the fixed shaft 13 passes through the second shell 15 and fixes the second shell 15 to the other end of the fixed portion 12. The fixed portion 12, the first shell 14 and the second shell 15 cooperate to form a receiving space 11 and accommodate the magnetic modulation motor 20 in the receiving space 11, as shown in FIG. Figure 2 shown.

[0028] For further information, see Figure 1 and Figure 2 The fixing portion 12 is provided with a protrusion 121 extending along the extension direction of the fan blade 30. One end of the fan blade 30 abuts against the end surface of the protrusion 121 and is fixedly connected. This arrangement can make the fan blade 30 run more stably and reduce shaking and noise.

[0029] Further, see Figures 1 to 4The fixed shaft 13 includes a shaft body 131 fixedly connected to the central shaft hole 2111 of the motor stator 21, a first connecting end 132 located at one end of the shaft body 131, and a second connecting end 133 located at the other end of the shaft body 131. The first connecting end 132 is fixedly connected to the first shell 14, and the second connecting end 133 is fixedly connected to the second shell 15.

[0030] See Figure 2 and Figure 4 The fixed shaft 13 is provided with a through hole 134 for connecting a power cable. Power is supplied to the magnetically modulated motor 20 via the power cable. When the coil winding 212 is energized, the stator magnetic block 213 increases the magnetic force, generating a rotating magnetic field in the air gap. This drives the rotor permanent magnet assembly 222, which in turn rotates the entire motor rotor 22 and the rotating assembly 10. This in turn rotates the fan blades 30 fixed to the rotating assembly 10, providing ventilation and cooling for indoor environments such as industrial plants and large gymnasiums.

[0031] In this embodiment, the motor stator 21 is on the inner side and the motor rotor 22 is on the outer side, which is convenient for directly driving the fan blades 30 to operate. Based on the principle of magnetic field modulation, the coil winding 212 on the motor stator 21 is connected to a three-phase excitation source to provide energy input for the motor. The magnetic flux is increased by the stator magnetic adjustment block 213, and energy is transmitted by using a harmonic magnetic field, thereby improving the motor torque output. Compared with traditional reduction box motor fans, the industrial fan 100 of this embodiment can avoid friction and vibration in mechanical gears, reduce mechanical losses, and improve motor efficiency.

[0032] The main dimensional parameters of the industrial fan 100 of this embodiment are as follows: the axial length of the motor rotor 22, motor stator 21, and fixed portion 12 is 60 mm. The outer diameter of the motor rotor 22 is 150 mm, and the inner diameter is 130 mm. The radial width of the air gap between the motor stator 21 and the motor rotor 22 is 0.5 mm. The radial outer diameter of the motor stator 21 is 129 mm. The radial length of the stator slots is 4 mm. The width of each stator tooth 2112 is 4°, and the width of the stator slots is 5.2°. The radial length of the coil winding 212 is 13.5 mm. The central axis hole 2111 of the stator yoke 211 is 40 mm. The length of the fixed shaft 13 is 150 mm. The diameter of the first housing 14 and the second housing 15 is 150 mm, and the axial length is 70 mm. The inner diameter of the fixed portion 12 is 150 mm, and the outer diameter is 190 mm. The length of the fan blade 30 is 5000 mm.

[0033] The above descriptions are only some embodiments of the present invention and do not limit the scope of protection of the present invention. Any equivalent device or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An industrial fan based on a low-speed, high-torque magnetic motor, characterized in that: include: A rotating assembly with an accommodation space inside, a magnetic modulation motor arranged in the accommodation space, and fan blades fixed to the outside of the rotating assembly; The magnetically adjustable motor comprises: a motor stator and a motor rotor sleeved on the outside of the motor stator, an air gap being formed between the motor stator and the motor rotor, the motor stator comprising a stator iron yoke, a coil winding wound on the stator iron yoke, and a stator magnetic adjustment block fixed to an end of the stator iron yoke, the motor rotor comprising a rotor iron yoke and a rotor permanent magnet assembly attached to the inside of the rotor iron yoke, the stator magnetic adjustment block and the rotor permanent magnet assembly being radially magnetized; When the coil winding is energized, the magnetic force is increased by the stator magnetic adjustment block, generating a rotating magnetic field in the air gap, driving the rotor permanent magnet assembly to drive the entire motor rotor and the rotating assembly to rotate, thereby driving the fan blades fixed to the rotating assembly to rotate; Among them, two stator teeth are provided at the end of the stator iron yoke, a stator tooth slot is formed between the stator teeth, the stator magnetic adjustment block is nested in the stator tooth slot, the width of each stator tooth is 4°, and the width of the stator tooth slot is 5.2°.

2. The industrial fan according to claim 1, characterized in that The rotating assembly includes: a fixed part with open ends and a hollow interior, a fixed shaft arranged in the fixed part, and a first shell and a second shell arranged at both ends of the fixed part. The fixed shaft passes through the center of the motor stator, and the outer side of the rotor yoke is fixedly connected to the inner wall of the fixed part. One end of the fixed shaft passes through the first shell and fixes the first shell to one end of the fixed part, and the other end of the fixed shaft passes through the second shell and fixes the second shell to the other end of the fixed part.

3. The industrial fan according to claim 2, characterized in that: A convex block partially extending along the extension direction of the fan blade is provided on the peripheral side of the fixing portion, and one end of the fan blade abuts against the end surface of the convex block and is fixedly connected.

4. The industrial fan according to claim 2, characterized in that The fixed shaft includes a shaft body fixedly connected to the motor stator, a first connecting end located at one end of the shaft body and a second connecting end located at the other end of the shaft body, the first connecting end is fixedly connected to the first shell, and the second connecting end is fixedly connected to the second shell.

5. The industrial fan according to claim 2, characterized in that: The fixed shaft is provided with a through hole for connecting the cable.

6. The industrial fan according to claim 1, characterized in that The rotor permanent magnet assembly includes a plurality of bar-shaped permanent magnets uniformly distributed along the circumferential direction, and the magnetization directions of two adjacent bar-shaped permanent magnets are opposite.

7. The industrial fan according to claim 1, characterized in that The rotating component is made of non-magnetic material.

8. The industrial fan according to claim 1, characterized in that: The stator iron yoke and the rotor iron yoke are made of magnetic conductive material.

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