Explosion-proof centrifugal fan directly driven by permanent magnet high-speed motor

Abstract

The invention discloses an explosion-proof centrifugal fan directly driven by a permanent magnet high-speed motor, which relates to the field of centrifugal fan structures and comprises a shell, the high-speed permanent magnet motor is arranged in the shell and forms an air chamber with the shell, a first wind wheel is arranged in the shell and is coaxially fixed on one side of the high-speed permanent magnet motor, and a heat dissipation wheel is arranged in the shell and is coaxially fixed on the other side of the high-speed permanent magnet motor. The cooling assembly is arranged on the side, close to the first wind wheel, of the shell, and the cooling assembly can reduce the temperature of the air chamber. The permanent-magnet high-speed motor direct-drive explosion-proof centrifugal fan can improve the heat dissipation effect when the permanent-magnet high-speed motor works, so that the temperature generated in the operation process of the permanent-magnet high-speed motor direct-drive explosion-proof centrifugal fan is reduced, explosion caused when the motor works at high temperature is avoided, meanwhile, the operation efficiency and stability of the motor can be improved, and the service life of the motor is prolonged. The service life of the motor is prolonged.

Description

Technical Field

[0001] The present invention relates to the field of centrifugal fan structures, and in particular to a permanent magnet high-speed motor directly driven explosion-proof centrifugal fan. Background Art

[0002] The permanent magnet high-speed motor direct-drive explosion-proof centrifugal fan is a high-speed fan that directly connects the wind wheel to the permanent magnet high-speed motor, achieving high efficiency and directness of power transmission, improving the operating efficiency and energy saving effect of the fan, and realizing the explosion-proof function.

[0003] However, during the operation of a permanent magnet high-speed motor, various losses are inevitably generated, including eddy current loss, core loss, and resistance loss. These losses are converted into heat energy inside the motor, causing the motor temperature to rise, which in turn increases the temperature of the air chamber between the permanent magnet high-speed motor and the housing.

[0004] The increase in the air chamber temperature will slow down the activity of the gas inside the air chamber, thereby increasing the air pressure inside the air chamber, which in turn brings the risk of explosion. At the same time, excessively high air chamber temperature will reduce the internal magnetism of the permanent magnet, causing the magnetic properties of the motor to decline and accelerate the aging of the insulation material inside the motor, thereby affecting the operating efficiency and stability of the fan and shortening the service life of the motor.

[0005] Therefore, an efficient and reliable cooling system is needed to solve the high temperature problem of permanent magnet high-speed motor direct-driven centrifugal fans. Summary of the Invention

[0006] The purpose of the present invention is to provide a permanent magnet high-speed motor directly driven flameproof centrifugal fan, which can improve the heat dissipation effect of the permanent magnet high-speed motor when it is working, thereby reducing the temperature generated by the permanent magnet high-speed motor directly driven flameproof centrifugal fan during operation, avoiding explosions caused by the motor when working at high temperatures, and at the same time improving the operating efficiency and stability of the motor and extending the service life of the motor.

[0007] The above-mentioned optimized structure of the present invention is achieved by the following technical solutions: A permanent magnet high-speed motor directly driven explosion-proof centrifugal fan comprises a housing; a high-speed permanent magnet motor, the high-speed permanent magnet motor being arranged in the housing and forming an air chamber with the housing; a first wind wheel, the first wind wheel being disposed in the housing and coaxially fixed to one side of the high-speed permanent magnet motor; a heat dissipation wheel, the heat dissipation wheel being arranged in the housing and being coaxially fixed to the other side of the high-speed permanent magnet motor; A cooling component is provided on a side of the housing close to the first wind wheel, and the cooling component can reduce the temperature of the air chamber.

[0008] In some embodiments, the housing includes a fixed shell, and the high-speed permanent magnet motor is disposed in the fixed shell; a volute, the volute being arranged on a side of the fixed housing close to the first wind wheel and surrounding the first wind wheel; an air inlet pipe connected to one side of the volute; A heat dissipation cover is provided on a side of the fixed shell close to the heat dissipation wheel, and the heat dissipation cover is provided on the heat dissipation wheel; A connecting plate is arranged in the shell and between the fixed shell and the volute.

[0009] In some embodiments, the high-speed permanent magnet motor includes a driving member, and the driving member is disposed in the housing; Two floating members, the two floating members are arranged in the housing and symmetrically arranged on both sides of the driving member; A rotating shaft is provided, wherein the rotating shaft passes through the driving member and the two floating members, and the first wind wheel and the heat dissipation wheel are respectively provided on both sides of the rotating shaft.

[0010] In some embodiments, the driving member includes a stator, and the stator is fixed in the housing; The rotor is coaxially arranged in the stator, the rotating shaft is passed through the rotor, and an air gap is left between the rotor and the stator.

[0011] In some embodiments, the cooling component includes a second wind wheel, and the second wind wheel is coaxially sleeved on the high-speed permanent magnet motor; A heat dissipation inner shell, the heat dissipation inner shell is coaxially arranged in the shell body, and the heat dissipation inner shell is provided with the high-speed permanent magnet motor; a main air flow channel, the main air flow channel being provided in the high-speed permanent magnet motor and being in communication with the second wind wheel; A return channel is provided between the shell and the heat dissipation inner shell, and is communicated with the air chamber and the second wind wheel.

[0012] In some embodiments, the cooling component further includes guide ribs, a plurality of the guide ribs are disposed between the shell and the heat dissipation inner shell, and the plurality of the guide ribs are distributed in a spiral shape.

[0013] In some embodiments, the cooling assembly further comprises a liquid storage chamber, and the liquid storage chamber is provided on the inner wall of the housing; Micro-pore nozzles, a plurality of micro-pore nozzles are arranged at equal intervals between the high-speed permanent magnet motor and the first wind wheel, and are connected to the liquid storage chamber; A liquid feeding pump is provided between the liquid storage chamber and the microporous nozzle.

[0014] In some embodiments, the cooling assembly further includes a liquid return tank, which is provided on the inner wall of the housing and surrounds the second wind wheel; A reflux channel is transversely arranged on the inner bottom wall of the shell, and is connected to the liquid return groove and the micropore nozzle.

[0015] In some embodiments, a temperature measuring component is further included, and the temperature measuring component is electrically connected to the liquid delivery pump.

[0016] In some embodiments, the temperature measurement component includes a plurality of platinum thermal resistors, and the plurality of platinum thermal resistors are pre-buried in the high-speed permanent magnet motor; A plurality of infrared sensors are arranged in the air chamber in an array.

[0017] One or more of the above technical solutions in the embodiments of the present invention have at least the following technical effects or advantages: The present invention directly connects the high-speed permanent magnet motor with the first wind wheel to achieve direct drive of the first wind wheel, improves the efficiency of the fan and reduces energy consumption; a cooling component is set in the shell, which can effectively promote the circulation of gas in the air chamber, take away the heat generated by the high-speed permanent magnet motor, reduce the temperature of the air chamber, improve the heat dissipation efficiency, avoid the problems of permanent magnet magnetism decline and insulation material aging caused by excessive temperature, improve the operation stability and reliability of the motor, extend the service life of the motor, and at the same time reduce the air pressure in the air chamber, reduce the risk of explosion, and ensure the safe operation of the fan in dangerous environments. A heat dissipation wheel is set at the end of the high-speed permanent magnet motor to form a dual heat dissipation structure with the cooling component, thereby improving the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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 embodiments or the description of the prior art. 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 paying any creative work.

[0019] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 A structural diagram of another perspective of the present invention; Figure 3 It is the front view of the present invention; Figure 4 It is a cross-sectional view taken along AA of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point B in the middle.

[0020] In the figure: 1. Shell; 11. Fixed shell; 12. Volute; 13. Air inlet pipe; 14. Heat dissipation cover; 15. Connecting plate; 2. High-speed permanent magnet motor; 21. Driving part; 211. Stator; 212. Rotor; 22. Floating part; 23. Rotating shaft; 3. First wind wheel; 4. Heat dissipation wheel; 5. Cooling component; 51. Second wind wheel; 52. Heat dissipation inner shell; 53. Main air flow channel; 54. Return channel; 55. Guide ribs; 56. Liquid return tank; 6. Air chamber. DETAILED DESCRIPTION

[0021] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0022] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0024] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0025] Example 1: refer to Figure 1-5A permanent magnet high-speed motor direct-driven explosion-proof centrifugal fan includes a shell 1, which can provide fixed support and protection for internal components; the shell 1 can be made of explosion-proof materials such as Class IIB explosion-proof steel plate (thickness 8mm) that meets the GB3836.1-2021 standard, and the surface can be sprayed with a ceramic-based composite coating (thickness 0.5mm), and the explosion-proof joint surface gap is ≤0.15mm, which can improve the impact resistance of the shell 1 and the protection performance of the centrifugal fan, so that it meets the use requirements of explosive gas environments. A high-speed permanent magnet motor 2 is arranged inside the shell 1, and a relatively closed air chamber 6 is formed between the high-speed permanent magnet motor 2 and the shell 1. When the high-speed permanent magnet motor 2 is running, various losses (such as eddy current loss, core loss, etc.) will be generated inside it, which will gradually heat up the inside of the high-speed permanent magnet motor 2, and then the temperature in the air chamber 6 will continue to rise; a first wind wheel 3 is provided in the shell 1, and the first wind wheel 3 is directly coaxially fixed on one side of the high-speed permanent magnet motor 2. When the high-speed permanent magnet motor 2 is started, the first wind wheel 3 rotates at a high speed, sucking air from the outside of the shell 1, and forming a strong airflow around the first wind wheel 3 to discharge it; opposite to the first wind wheel 3, the heat dissipation wheel 4 is also coaxially fixed on the other side of the high-speed permanent magnet motor 2. Through the rotation of the high-speed permanent magnet motor, the heat dissipation wheel 4 follows the rotation, generating airflow, taking away part of the heat in the air chamber 6, and realizing the heat dissipation of the centrifugal fan. A cooling component 5 is provided on the side of the housing 1 close to the first wind wheel 3. The cooling component 5 can further reduce the temperature of the air chamber 6 to avoid explosion caused by the motor working at high temperature and ensure that the motor can maintain stability and efficiency under long-term, high-load operation.

[0026] In some embodiments, the first wind wheel 3 includes a hub and multiple blades, and a three-dimensional flow design can be adopted to maximize the efficiency of the first wind wheel 3 and expand the working area. The first wind wheel 3 as a whole can be made of high-strength forged aluminum or titanium alloy, and is slightly more finely processed by a five-axis CNC machining center, with better corrosion resistance and strong deformation resistance, so that it can meet the high-speed working environment requirements of the centrifugal fan.

[0027] Specifically, when the high-speed permanent magnet motor 2 is started, it drives the first wind wheel 3 to rotate at high speed, sucking in air from the outside of the shell 1, generating a strong airflow. This part of the airflow will rotate with the first wind wheel 3 and eventually be thrown out of the shell 1; at the same time, the heat dissipation wheel 4 follows the rotation, absorbing and taking away the heat in the relatively sealed air chamber 6, thereby reducing the temperature of the air chamber 6. At the same time, the cooling component 5 is also working continuously, forming a dual heat dissipation structure with the heat dissipation wheel 4 to accelerate the dissipation of heat.

[0028] In some embodiments, the shell 1 includes a fixed shell 11, which can be made of explosion-proof materials such as Class IIB explosion-proof steel plates (thickness 8mm) in accordance with GB3836.1-2021 standards. The surface of the fixed shell 11 can be provided with multiple fins to give it good heat dissipation performance and structural strength. A high-speed permanent magnet motor 2 is provided in the fixed shell 11, and a motor mounting seat can be provided inside the fixed shell 11 to fix the high-speed permanent magnet motor 2. This is a prior art and will not be repeated here. An air chamber 6 is formed between the fixed shell 11 and the high-speed permanent magnet motor 2. A volute 12 is provided on the side of the fixed shell 11 close to the first wind wheel 3. The volute 12 can be made of explosion-proof materials such as Class IIB explosion-proof steel plates (thickness 8mm) in accordance with GB3836.1-2021 standards. It can be made by CNC machining, which can ensure the smoothness of the air duct and the uniform distribution of the airflow, while ensuring the explosion-proof performance of the volute 12. The volute 12 can be connected by bolts or welding. The vent 12 is fixed on one side of the fixed shell 11 close to the first wind wheel 3, and is arranged around the outside of the first wind wheel 3 to form an air outlet air flow channel for the first wind wheel 3. The volute 12 is connected to an air inlet pipe 13 on the side away from the fixed shell 11, and the other side of the air inlet pipe 13 can be connected to an external air duct or pipeline for introducing external air; a heat dissipation cover 14 is provided on the side of the fixed shell 11 close to the heat dissipation wheel 4. The heat dissipation cover 14 can be made of lightweight aluminum alloy material through a stamping forming process. The heat dissipation cover 14 can be covered on the heat dissipation wheel 4. The heat dissipation cover 14 can be connected to the fixed shell 11 by bolts or snaps. This is the existing technology and will not be repeated here. The heat dissipation cover 14 forms a heat dissipation channel for the heat dissipation wheel 4 to prevent external foreign matter from entering and affecting the normal operation of the fan. The connecting plate 15 is arranged in the shell 1 and between the fixed shell 11 and the volute 12. The connecting plate 15 can connect the fixed shell 11 and the volute 12 to ensure the stability of the structure.

[0029] In some embodiments, the high-speed permanent magnet motor 2 includes a driving member 21, which includes a stator 211 and a rotor 212. The stator 211 is fixed in the housing 1, and the rotor 212 is coaxially arranged in the stator 211. An air gap is left between the rotor 212 and the stator 211 to ensure efficient operation of the motor. The structure of the stator 211 and the rotor 212 is the existing technology and will not be repeated here. Two floating members 22 are also provided in the housing 1. The two floating members 22 are symmetrically arranged on both sides of the driving member 21, and the rotating shaft 23 passes through. A rotor 212 and two floating parts 22 are provided. The two floating parts 22 can support the rotating shaft 23. The floating parts 22 can be magnetic bearings, which can realize contactless rotation of the rotating shaft 23, reduce friction when the rotating shaft 23 rotates, and thus reduce the heat caused by friction. A first wind wheel 3 and a heat dissipation wheel 4 are respectively provided on both sides of the rotating shaft 23. The rotating shaft 23 is driven by the driving part 21 to rotate contactlessly, thereby driving the rotation of the first wind wheel 3 and the heat dissipation wheel 4, thereby realizing the blowing and heat dissipation of the centrifugal fan.

[0030] In some embodiments, the cooling assembly 5 includes a second wind wheel 51, a heat dissipation inner shell 52, a main airflow channel 53, and a return flow channel 54. The second wind wheel 51 is coaxially mounted on the high-speed permanent magnet motor 2. When the high-speed permanent magnet motor 2 is running, the second wind wheel 51 rotates at high speed. The second wind wheel 51 is the core power component that drives the gas to flow in and out of the high-speed permanent magnet motor 2. Because the second wind wheel 51 is coaxial with the high-speed permanent magnet motor 2, it can fully utilize the rotational energy of the high-speed permanent magnet motor 2 without the need for an additional power source, thus saving energy and simplifying the structure. The blade shape and angle of the second wind wheel 51 can be designed according to actual conditions to ensure that sufficient wind pressure can be generated when the second wind wheel 51 rotates at high speed to promote rapid gas flow.

[0031] The heat dissipation inner shell 52 is coaxially arranged in the shell 1, and the heat dissipation inner shell 52 is provided with a high-speed permanent magnet motor 2, which can provide a relatively independent heat dissipation space for the high-speed permanent magnet motor 2. The heat dissipation inner shell 52 can be made of a metal material with good thermal conductivity, such as aluminum alloy, which can be formed by spinning. It can quickly conduct the heat generated by the motor and at the same time make the airflow inside more stable and orderly.

[0032] The main air flow channel 53 is arranged in the high-speed permanent magnet motor 2 and is connected to the second wind wheel 51. When the second wind wheel 51 rotates, it can drive the gas to flow in the main air flow channel 53. The strong suction force generated by the second wind wheel 51 drives the gas to enter the main air flow channel 53 from one end of the high-speed permanent magnet motor 2. The gas flows rapidly in the main air flow channel 53 and fully contacts the heat-generating components of the high-speed permanent magnet motor 2, such as the stator 211 and the rotor 212, taking away a large amount of heat generated by the operation of the high-speed permanent magnet motor 2. The shape and size of the main air flow channel 53 can be designed according to actual conditions to reduce the resistance of the gas flowing in the main air flow channel 53, increase the flow speed of the gas, and thus improve the heat dissipation efficiency.

[0033] The return channel 54 is provided between the shell 1 and the heat dissipation inner shell 52 . One end of the return channel 54 is connected to the air chamber 6 , and the other end is connected to the second wind wheel 51 , thereby cooperating with the main air flow channel 53 to form a complete gas circulation flow path.

[0034] Specifically, the second wind wheel 51 rotates to generate a strong suction force, causing the gas in the air chamber 6 to enter the main air flow channel 53, pass through the high-speed permanent magnet motor 2, and fully contact the heat-generating components of the high-speed permanent magnet motor 2, taking away a large amount of heat generated by the operation of the high-speed permanent magnet motor 2, and flow to the second wind wheel 51, and contact with the second wind wheel 51, and initially heat exchange occurs. At the same time, the rotation of the second wind wheel 51 generates a strong centrifugal force, which throws the hot gas carrying heat into the return channel 54. When the hot gas flows through the return channel 54, it exchanges heat with the external environment through the fixed shell 11, so that its temperature is reduced, and under the suction of the second wind wheel 51, it enters the main air flow channel 53 again to achieve circulating heat dissipation.

[0035] In some embodiments, the cooling component 5 also includes a plurality of guide ribs 55, which are evenly distributed between the inner wall of the fixed shell 11 and the heat dissipation inner shell 52, and can realize the connection between the fixed shell 11 and the heat dissipation inner shell 52, play a certain structural reinforcement role, and improve the stability of the entire cooling component. At the same time, the return channel 54 is divided into multiple flow units to guide the flow direction of the gas, so that the flow of the gas in the return channel 54 is more orderly. The plurality of guide ribs 55 are distributed in a spiral shape. The spiral distribution can increase the flow length of the gas, thereby increasing the residence time of the gas in the channel, so that the gas has more opportunities to exchange heat with the heat dissipation inner shell 52, and further enhance the heat dissipation effect.

[0036] The specific working principle is as follows: When the permanent magnet high-speed motor directly drives the flameproof centrifugal fan, the high-speed permanent magnet motor 2 is powered on. Within the driver 21 of the high-speed permanent magnet motor 2, the stator 211 generates a rotating magnetic field, causing the rotor 212 to rotate at high speed within the air gap, driving the rotating shaft 23 extending therethrough to rotate synchronously. The first wind wheel 3 and the heat dissipation wheel 4, respectively fixed on either side of the rotating shaft 23, rotate at high speed in response.

[0037] When the first impeller 3 rotates at high speed, it draws in external air from the air inlet duct 13. The air inlet duct 13 is connected to the volute 12. Under the action of the first impeller 3, the air acquires strong kinetic energy and is discharged along the air outlet channel formed by the volute 12, thus realizing the gas transportation function of the fan.

[0038] The high-speed permanent magnet motor 2 generates heat, which increases the temperature of the air chamber 6. While the first wind wheel 3 is working, the heat dissipation wheel 4 also rotates at high speed. The rotation of the heat dissipation wheel 4 generates airflow, which takes away part of the heat in the air chamber 6 and plays a preliminary heat dissipation role.

[0039] The second wind wheel 51 in the cooling component 5 rotates synchronously with the rotating shaft 23. When the second wind wheel 51 rotates at high speed, it generates a strong suction force, causing the gas in the air chamber 6 to enter the main air flow channel 53 from one end of the high-speed permanent magnet motor 2. The gas flows rapidly in the main air flow channel 53, fully contacts the heat-generating components of the high-speed permanent magnet motor 2, and takes away a large amount of heat. The hot gas carrying heat flowing out of the main air flow channel 53 is thrown into the return channel 54 under the action of the centrifugal force generated by the rotation of the second wind wheel 51. When the hot gas flows through the return channel 54, it exchanges heat with the external environment through the fixed shell 11, and the temperature is reduced. Afterwards, under the suction of the second wind wheel 51, it enters the main air flow channel 53 again to achieve cyclic heat dissipation.

[0040] Example 2: refer to Figure 5 , this embodiment differs from embodiment 1 in that: In some embodiments, the cooling component 5 further includes a liquid storage chamber, a plurality of microporous nozzles, and a liquid delivery pump. The liquid storage chamber is provided on the inner wall of the housing 1 and can store cooling liquid. The cooling liquid can be a solution such as a propylene glycol aqueous solution. These liquids have good heat exchange performance, a low vaporization temperature, and will not damage the internal components of the fan. Multiple micro-pore nozzles are evenly spaced and positioned on a side wall of connecting plate 15 near high-speed permanent magnet motor 2. These nozzles are connected to a liquid storage chamber. A liquid delivery pump, serving as a power source, is located between the liquid storage chamber and the micro-pore nozzles. When cooling is required, the delivery pump activates and delivers the cooling liquid in the liquid storage chamber to the micro-pore nozzles at a constant pressure. The aperture size and distribution density of the micro-pore nozzles ensure that the cooling liquid is sprayed in a fine and uniform mist, thereby increasing the contact area between the cooling liquid and the surrounding air, enabling more efficient heat exchange and effectively reducing the temperature of the surrounding air, particularly focusing on cooling the high-temperature area near high-speed permanent magnet motor 2.

[0041] In some embodiments, the cooling component 5 also includes a liquid return tank 56 and a reflow channel. The liquid return tank 56 is provided on the inner wall of the shell 1 and is arranged around the second wind wheel 51. When the gas containing the vaporized cooling liquid is thrown to the liquid return tank 56 by the second wind wheel 51, the gas contacts the liquid return tank 56, heat exchange occurs, and the cooling liquid is liquefied, thereby realizing the recovery of the scattered liquid after spray cooling. The reflow channel is horizontally provided on the inner bottom wall of the shell 1, and the reflow channel is connected to the liquid return tank 56 and the microporous nozzle. After the liquid return tank 56 collects a certain amount of cooling liquid, the liquid returns to the liquid storage chamber through the reflow channel under the action of gravity (the liquid return tank 56 can be tilted) or a small circulation pump (if necessary), thereby realizing the recycling of the cooling liquid, saving resources, reducing operating costs, and avoiding liquid waste and environmental pollution. At the same time, it ensures that the spray cooling system can operate continuously and stably, providing reliable guarantee for the efficient heat dissipation of the fan.

[0042] In some embodiments, a temperature measuring component is also included, which is electrically connected to the liquid delivery pump and is used to monitor the temperature of the high-speed permanent magnet motor 2 and the air chamber 6, and control the operation of the liquid delivery pump according to the temperature, thereby achieving precise spray cooling control.

[0043] Specifically, the temperature measuring component may include multiple platinum thermal resistors and multiple infrared sensors. Multiple platinum thermal resistors are pre-buried in the high-speed permanent magnet motor 2 and can accurately measure the temperature changes inside the motor. Multiple infrared sensors are arranged in an array in the air chamber 6 to monitor the temperature distribution in the air chamber 6 and to grasp the temperature information of different areas of the air chamber 6. When the temperature measuring component detects that the temperature in the high-speed permanent magnet motor 2 or the air chamber 6 reaches a preset threshold, it immediately sends a signal to the liquid delivery pump. The liquid delivery pump starts or adjusts the working state according to the signal to realize intelligent spray cooling control, ensuring that it plays a role in time when cooling is most needed, thereby improving energy utilization efficiency.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A permanent magnet high-speed motor directly driven explosion-proof centrifugal fan, characterized by: comprising a housing (1); A high-speed permanent magnet motor (2), the high-speed permanent magnet motor (2) being arranged in the housing (1) and forming an air chamber (6) with the housing (1); a first wind wheel (3), the first wind wheel (3) being arranged in the housing (1) and coaxially fixed to one side of the high-speed permanent magnet motor (2); A heat dissipation wheel (4), the heat dissipation wheel (4) being arranged in the housing (1) and being coaxially fixed to the other side of the high-speed permanent magnet motor (2); A cooling component (5) is provided on a side of the housing (1) close to the first wind wheel (3), and the cooling component (5) can reduce the temperature of the air chamber (6).

2. The permanent magnet high-speed motor direct-driven explosion-proof centrifugal fan according to claim 1, characterized in that: The housing (1) comprises a fixed shell (11), and the high-speed permanent magnet motor (2) is arranged in the fixed shell (11); A volute (12), the volute (12) being arranged on a side of the fixed housing (11) close to the first wind wheel (3), and the volute (12) being arranged outside the first wind wheel (3); an air inlet pipe (13), the air inlet pipe (13) being connected to one side of the volute (12); a heat dissipation cover (14), the heat dissipation cover (14) being arranged on a side of the fixed shell (11) close to the heat dissipation wheel (4), and the heat dissipation cover (14) being covered on the heat dissipation wheel (4); A connecting plate (15) is provided in the housing (1) and between the fixed housing (11) and the volute (12).

3. The permanent magnet high-speed motor direct-driven explosion-proof centrifugal fan according to claim 1, characterized in that: The high-speed permanent magnet motor (2) comprises a driving component (21), and the driving component (21) is arranged in the housing (1); Two floating members (22), the two floating members (22) being arranged in the housing (1) and symmetrically arranged on both sides of the driving member (21); A rotating shaft (23) is provided, wherein the rotating shaft (23) passes through the driving member (21) and the two floating members (22), and the first wind wheel (3) and the heat dissipation wheel (4) are provided on both sides of the rotating shaft (23).

4. The permanent magnet high-speed motor direct-driven explosion-proof centrifugal fan according to claim 3, characterized in that: The driving member (21) comprises a stator (211), and the stator (211) is fixed in the housing (1); A rotor (212) is coaxially arranged in the stator (211), the rotating shaft (23) is passed through the rotor (212), and an air gap is left between the rotor (212) and the stator (211).

5. The permanent magnet high-speed motor direct-driven explosion-proof centrifugal fan according to claim 1, characterized in that: The cooling component (5) comprises a second wind wheel (51), and the second wind wheel (51) is coaxially sleeved on the high-speed permanent magnet motor (2); A heat dissipation inner shell (52), the heat dissipation inner shell (52) being coaxially arranged in the housing (1), and the heat dissipation inner shell (52) being provided with the high-speed permanent magnet motor (2); a main air flow channel (53), the main air flow channel (53) being provided in the high-speed permanent magnet motor (2) and being in communication with the second wind wheel (51); A return channel (54), the return channel (54) is provided between the housing (1) and the heat dissipation inner housing (52), and is in communication with the air chamber (6) and the second wind wheel (51).

6. The permanent magnet high-speed motor direct-driven explosion-proof centrifugal fan according to claim 5, characterized in that: The cooling component (5) further comprises guide ribs (55), a plurality of the guide ribs (55) are arranged between the shell (1) and the heat dissipation inner shell (52), and the plurality of the guide ribs (55) are distributed in a spiral shape.

7. The permanent magnet high-speed motor direct-driven explosion-proof centrifugal fan according to claim 5, characterized in that: The cooling component (5) further comprises a liquid storage chamber, wherein the liquid storage chamber is provided on the inner wall of the housing (1); Microporous nozzles, a plurality of microporous nozzles are arranged at equal intervals between the high-speed permanent magnet motor (2) and the first wind wheel (3), and are connected to the liquid storage chamber; A liquid feeding pump is provided between the liquid storage chamber and the microporous nozzle.

8. The permanent magnet high-speed motor direct-driven flameproof centrifugal fan according to claim 7, characterized in that: The cooling component (5) further includes a liquid return tank (56), wherein the liquid return tank (56) is provided on the inner wall of the housing (1) and is arranged outside the second wind wheel (51); A reflux channel is provided transversely on the inner bottom wall of the shell (1), and the reflux channel is connected to the liquid return groove (56) and the microporous nozzle.

9. The permanent magnet high-speed motor direct-driven flameproof centrifugal fan according to claim 8, characterized in that: It also includes a temperature measuring component, which is electrically connected to the liquid feeding pump.

10. The permanent magnet high-speed motor directly driven explosion-proof centrifugal fan according to claim 9, characterized in that: The temperature measurement component comprises a plurality of platinum thermal resistors, and the plurality of platinum thermal resistors are pre-buried in the high-speed permanent magnet motor (2); A plurality of infrared sensors are arranged in an array in the air chamber (6).

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