Energy-saving magnetic suspension blower

Abstract

The invention relates to the technical field of magnetic suspension air blowers, and discloses an energy-saving magnetic suspension air blower which comprises a magnetic suspension motor, a volute and an impeller. The volute is connected to the outer side of the front end of the magnetic suspension motor in a sealed mode, the magnetic suspension motor comprises a rotor shaft, and the rotor shaft extends forwards into the volute and is connected with the impeller. A plurality of circles of annular first flow guide plates are arranged on the front side of the rear wall of the volute, a plurality of annular second flow guide plates matched with the first flow guide plates are arranged on the rear side of the impeller, and the edges of the first flow guide plates and the edges of the second flow guide plates are bent oppositely and surround each other at intervals. A plurality of vent holes are uniformly distributed in the circumference of the second guide plate; by means of the first flow guide plate and the second flow guide plate which are bent oppositely and surround in a spaced mode, the airflow direction can be changed, and airflow reversely flows in a multiple-direction-changing mode; the vent holes can distribute part of airflow and cross with main airflow to consume airflow energy, air flow resistance is increased, air leakage is reduced, and the magnetic suspension air blower is energy-saving and efficient.

Description

Technical Field

[0001] This invention relates to the field of magnetic levitation blower technology, and specifically to an energy-saving magnetic levitation blower. Background Technology

[0002] The magnetic levitation blower is a new type of high-efficiency, energy-saving, and environmentally friendly blower that integrates magnetic levitation bearing technology, high-speed permanent magnet synchronous motor technology, and three-dimensional flow impeller technology. Its core working principle involves using a high-speed permanent magnet synchronous motor direct-drive structure, integrating the centrifugal impeller and motor drive into a single integrated design. A built-in inductive position sensor continuously monitors the vibration and spatial clearance of the rotor shaft in the X, Y, and Z directions. The sensor signals are conditioned, analyzed, and processed by the magnetic levitation bearing controller to generate a control current, which is input to the magnetic bearing's winding coil to generate electromagnetic force, achieving contactless levitation of the rotor shaft. The impeller follows the rotor shaft... High-speed rotation draws air in through the volute inlet, which guides and pressurizes it before it is blown out through the outlet. Compared to traditional Roots blowers, it achieves energy savings of over 30%, requires no lubrication during operation, operates with low noise due to frictionlessness, and is equipped with an intelligent control system. Maintenance is minimal, requiring only periodic filter replacements, resulting in low maintenance costs and a service life of over 20 years. Magnetic levitation blowers are widely used in numerous industries, including wastewater treatment, pressurized raw material conveying, food and pharmaceutical processing, metal processing, thermal power generation, cement, chemicals, semiconductors, brewing, biopharmaceuticals, fermentation, papermaking, and textile printing and dyeing.

[0003] A sealing structure must be installed between the impeller and the motor of a magnetic levitation blower to isolate the conveyed gas on the impeller side from the precision cavity on the motor side. The gas on the impeller side may contain dust, oil, corrosive substances, or be under pressure. Meanwhile, the magnetic levitation bearings, permanent magnet rotors, and other components in the motor cavity are highly sensitive to impurities and humidity. The seal can isolate the medium in the impeller cavity, protect the motor and bearing system, reduce the impact of gas leakage on blower efficiency, ensure blower compression efficiency, improve energy saving, and reduce safety risks caused by gas leakage.

[0004] Mechanical seals involve contact friction. While they offer excellent sealing performance, they reduce fan efficiency, limit the energy-saving rate of magnetic levitation blowers, and shorten maintenance cycles. Patent CN112594199A discloses a core structure and leak-proof sealing design method for a high-speed magnetic levitation blower. It employs a non-contact labyrinth seal to isolate the medium between the impeller and motor sides. Labyrinth seals are the most commonly used sealing method for magnetic levitation blowers. Because the impeller is suspended with the rotor shaft, the internal sealing structure is non-contact and maintains a floating gap. Labyrinth seals achieve a sealing effect by altering the gas medium's flow path, increasing the difficulty and obstruction of airflow, and reducing gas leakage. However, existing labyrinth seal structures merely bend the gas passage, offering limited obstruction and limiting of gas flow, leaving room for improvement in gas leakage. Therefore, this paper proposes an energy-saving magnetic levitation blower. Summary of the Invention

[0005] The purpose of this invention is to solve at least one of the problems in the prior art and to provide an energy-saving magnetic levitation blower.

[0006] To achieve the above objectives, the present invention provides the following technical solution: An energy-saving magnetic levitation blower includes a magnetic levitation motor, a volute, and an impeller. The volute is sealed to the outer side of the front end of the magnetic levitation motor. The magnetic levitation motor includes a rotor shaft that extends forward into the volute and connects to the impeller. The front side of the rear wall of the volute is provided with several annular first guide plates, and the rear side of the impeller is provided with several annular second guide plates that cooperate with the first guide plates. The edges of the first and second guide plates are curved relative to each other and surround each other with a gap. Several ventilation holes are evenly distributed around the circumference of the second guide plates.

[0007] Furthermore, the radial cross-sections of both the first and second guide plates include straight portions and arc portions, and the arc portions of the first and second guide plates are interlaced.

[0008] Furthermore, the impeller is provided with several rings of guide ribs on its rear side, and the guide ribs rotate synchronously with the impeller to cause the gas to disperse centrifugally.

[0009] Furthermore, a first annular plate supporting the first guide plate is sealed to the front side of the rear wall of the volute, and a second annular plate supporting the second guide plate is provided on the rear side of the impeller, the second annular plate rotating synchronously with the impeller.

[0010] Furthermore, a transition cylinder is connected to the rear side of the inner edge of the first annular plate. The transition cylinder extends into the inner side of the output end of the magnetic levitation motor and surrounds the rotor shaft with gaps. A core cylinder is connected to the rear side of the inner edge of the second annular plate. The core cylinder rotates synchronously with the impeller and extends to the inner side of the transition cylinder. Several spiral guide vanes are evenly distributed on the outer circumference of the core cylinder. The guide vanes rotate synchronously with the impeller and move the gas forward.

[0011] Furthermore, the inner side of the transition cylinder has a tapered hole that gradually decreases in size forward, the gyration radius of the guide vane gradually decreases forward, and there is a gap between the outer side and the tapered hole.

[0012] Furthermore, the rotor shaft is provided with a step, the core cylinder abuts against the front side of the step, the impeller seal abuts against the front side of the second annular plate, and the front end of the rotor shaft is connected by a threaded locking nut to limit the impeller position; a key is provided on the outer side of the rotor shaft, and through grooves that cooperate with the key are provided on the inner side of the core cylinder and the inner side of the impeller.

[0013] Furthermore, the rear side of the second annular plate is provided with a plurality of annularly distributed centrifugal blades, the gaps between the centrifugal blades surrounding the outer side of the core cylinder.

[0014] Furthermore, the first annular plate and the volute are connected to the front end of the magnetic levitation motor by bolts, and the second annular plate is provided with several through holes through which the bolts can pass completely.

[0015] Furthermore, the second annular plate is formed by connecting several annular plates together, and the second guide plate is connected to the rear side of the outer edge of the annular plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention utilizes a first and a second guide plate that are relatively curved and interlocked to change the airflow direction, causing the airflow to flow in opposite directions multiple times. The vent can divert part of the airflow and cross with the main airflow, consuming airflow energy, increasing gas flow resistance, reducing gas leakage, and making the magnetic levitation blower energy-efficient. The second guide plate rotates relative to the first guide plate, and the first and second guide plates do not affect the magnetic levitation of the rotor shaft and impeller, thus not generating frictional losses. This invention utilizes guide ribs and centrifugal blades that rotate with the impeller to cause the gas to disperse centrifugally, generating a reverse airflow that inhibits gas leakage and enhances the sealing effect. The guide ribs and centrifugal blades are located behind the second annular plate and have a gap with the first annular plate, creating a circulating airflow between the rear side of the impeller and the front side of the rear wall of the volute, forming a gas sealing effect. Combined with the enhanced labyrinth seal of the guide plate, this significantly reduces gas leakage and improves the efficiency of the fan. The present invention utilizes a transition cylinder and a core cylinder to connect with the first annular plate and the second annular plate respectively, thereby communicating with the impeller rear clearance. It also utilizes spiral guide vanes to make the gas inside the motor cavity flow towards the impeller rear clearance, thereby preventing the gas behind the impeller from entering the motor cavity. This invention employs a conical hole and conical guide vanes to pressurize the gas in the motor cavity and resist gas leakage from the impeller cavity. There is a gap between the guide vanes and the conical hole, which does not affect the magnetic levitation of the shaft and the impeller. The design of the conical guide vanes and the conical hole can minimize gas leakage from the gap. In this invention, the first annular plate and the volute are bolted to the front end of the motor. The perforation facilitates the installation and fixation of the first annular plate. The second annular plate rotates with the rotor shaft through the core and through slot, and the locking nut is used to simultaneously position the core, the second annular plate and the impeller. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the external structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the internal structure of the present invention.

[0019] Figure 3 This is a schematic cross-sectional view of the first annular plate and the second annular plate of the present invention.

[0020] Figure 4 This is a schematic diagram of the front structure of the first annular plate of the present invention.

[0021] Figure 5 This is a schematic diagram of the rear structure of the first annular plate of the present invention.

[0022] Figure 6 This is a schematic diagram of the rear structure of the second annular plate of the present invention.

[0023] Figure 7 This is a schematic diagram of the front structure of the second annular plate of the present invention.

[0024] Figure 8 This is a schematic diagram of the front structure of the rotor shaft of the present invention.

[0025] Figure 9 This is a schematic diagram of the volute structure of the present invention.

[0026] Figure 10 This is a schematic diagram of the rear side of the impeller of the present invention.

[0027] In the diagram: 1. Magnetic levitation motor; 2. Volute; 3. Impeller; 4. First annular plate; 5. Second annular plate; 6. First guide plate; 7. Second guide plate; 8. Vent hole; 9. Guide rib; 10. Transition cylinder; 11. Core cylinder; 12. Conical hole; 13. Guide vane; 14. Centrifugal vane; 15. Bolt hole; 16. Perforation; 17. Step; 18. Key; 19. Locking nut; 101. Rotor shaft; 201. Outer shell; 202. Side ring cover. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention; that is, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] Specific embodiments of the energy-saving magnetic levitation blower provided by this invention: Please see Figures 1-10 An energy-saving magnetic levitation blower includes a magnetic levitation motor 1, a volute 2, and an impeller 3. The volute 2 is sealed to the outer front end of the magnetic levitation motor 1, and its rear wall is attached to the front side of the front wall of the magnetic levitation motor 1 by bolts, achieving a seal between the volute 2 and the magnetic levitation motor 1. In some other embodiments, a rubber sealing ring can be added between the rear side of the volute 2 and the magnetic levitation motor 1. A through hole is provided in the center of the rear wall of the volute 2 for the output shaft of the magnetic levitation motor 1 to pass through. An input pipe is connected to the front side of the volute 2, and a flange is provided at the end of the input pipe for connection to an external air inlet duct. A tangential output pipe is connected to the volute 2, and a flange is connected to the end of the output pipe for connection to an external exhaust duct.

[0030] The magnetic levitation motor 1 includes a rotor shaft 101, which extends forward into the volute 2 and is connected to an impeller 3. The impeller 3 is located inside the volute 2. The rotation of the impeller 3 generates centrifugal force, which introduces gas from the input pipe and discharges the gas from the output pipe. There is a gap between the rear side of the impeller 3 and the rear wall of the volute 2.

[0031] The rotor shaft 101 has a rotor on its outer side. The magnetic levitation motor 1 includes a motor housing, within which is a stator that rotates the rotor and a magnetic levitation bearing that provides non-contact support to the rotor shaft 101. The magnetic levitation bearing includes at least two radial bearings and one axial bearing. The front part of the rotor shaft 101 extends into the volute 2 and supports the impeller 3. Under the levitation support of the magnetic levitation bearing, the rotor shaft 101 and the impeller 3 produce slight axial movement and radial floating.

[0032] The front side of the rear wall of the volute 2 is provided with several annular first guide plates 6, and the rear side of the impeller 3 is provided with several annular second guide plates 7 that cooperate with the first guide plates 6. The edges of the first guide plates 6 and the edges of the second guide plates 7 are curved relative to each other and surround each other with gaps. In this embodiment, there are four first guide plates 6 and four second guide plates 7. All first guide plates 6 are concentric annular rings, and different first guide plates 6 have different diameters. There are gaps between adjacent first guide plates 6. All second guide plates 7 are concentric annular rings, and different second guide plates 7 have different diameters. There are gaps between adjacent second guide plates 7.

[0033] A first annular plate 4, supporting the first guide plate 6, is sealed to the front side of the rear wall of the volute 2. A second annular plate 5, supporting the second guide plate 7, is provided on the rear side of the impeller 3. The second annular plate 5 rotates synchronously with the impeller 3. The first annular plate 4 is fixedly attached to the front side of the rear wall of the volute 2, and the second annular plate 5 is attached to the rear side of the impeller 3. In some other embodiments, rubber sealing rings can be provided between the volute 2 and the first annular plate 4, and between the second annular plate 5 and the impeller 3, to improve the sealing effect.

[0034] The radial sections of both the first guide plate 6 and the second guide plate 7 include straight portions and arc portions, with the arc portions of the first guide plate 6 and the second guide plate 7 intersecting each other. The straight portions are inclined to the first annular plate 4 or the second annular plate 5. The side of the straight portion of the first guide plate 6 facing the center of the first annular plate 4 forms an acute angle with the first annular plate 4, and the side of the straight portion of the second guide plate 7 facing away from the center of the second annular plate 5 also forms an acute angle with the second annular plate 5. The arc of the arc portion is 210-240 degrees, and the arc portions of the first guide plate 6 and the second guide plate 7 intersect each other, with gaps extending into the inner side of the corresponding arc portions.

[0035] The gas inside the volute 2 enters between the outer edges of the first annular plate 4 and the second annular plate 5 and moves towards the center. Guided by the straight portion of the first guide plate 6, it changes direction laterally, then changes direction again through the arc portion of the first guide plate 6, moving away from the center. It then moves towards the center again, and subsequently, guided by the arc portion of the second guide plate 7, it first changes direction away from the center, then changes direction laterally towards the straight portion of the second guide plate 7. Guided by the straight portion of the second guide plate 7 and the second annular plate 5, it finally changes direction again towards the center. The gas needs to change direction multiple times to pass through the gap between the first guide plate 6 and the second guide plate 7, and a vortex is formed at the center position between the first guide plate 6 and the second guide plate 7, consuming airflow energy, increasing airflow resistance, and reducing gas passage and leakage. This embodiment uses four sets of first guide plates 6 and second guide plates 7, which can minimize gas leakage, improve fan efficiency, and reduce energy consumption. There is a gap between the first guide plate 6 and the second guide plate 7, which allows the second guide plate 7 to rotate relative to the first guide plate 6 without affecting the magnetic levitation of the rotor shaft 101 and the impeller 3, and without generating frictional loss.

[0036] The second guide plate 7 has several vent holes 8 evenly distributed around its circumference. The vent holes 8 are vertically aligned with the edge of the first guide plate 6. The vent holes 8 can divert part of the airflow, directly change the direction of the diverted airflow, cross and merge with the main airflow that has passed through the arc section and reversed direction, consume airflow energy, increase gas flow resistance, and reduce gas leakage.

[0037] A transition cylinder 10 is integrally connected to the rear inner edge of the first annular plate 4. The transition cylinder 10 extends into the inner side of the output end of the magnetic levitation motor 1 and surrounds the rotor shaft 101 with a gap. A core cylinder 11 is connected to the rear inner edge of the second annular plate 5. The core cylinder 11 rotates synchronously with the impeller 3 and extends to the inner side of the transition cylinder 10. There is a gap between the outer side of the core cylinder 11 and the inner side of the transition cylinder 10.

[0038] The rotor shaft 101 is provided with a step 17, the core cylinder 11 abuts against the front side of the step 17, and the impeller 3 is sealed against the front side of the second annular plate 5. The front end of the rotor shaft 101 is connected by a threaded locking nut 19 to limit the position of the impeller 3. The outside of the rotor shaft 101 is provided with a groove, which is located in front of the step 17. A key 18 is placed in the groove, and the key 18 protrudes from the outside of the rotor shaft 101. The inner side of the core cylinder 11 and the inner side of the impeller 3 are provided with through grooves that cooperate with the key 18. The rotor shaft 101 drives the core cylinder 11 and the impeller 3 to rotate simultaneously through the key 18, and drives the second annular plate 5 on the outer side of the front end of the core cylinder 11 to rotate synchronously. The step 17 and the locking nut 19 realize the axial positioning of the core cylinder 11 and the impeller 3.

[0039] Several spiral guide vanes 13 are evenly distributed around the outer circumference of the core cylinder 11. The guide vanes 13 rotate synchronously with the impeller 3, causing the gas inside the magnetic levitation motor 1 to tend to move forward through the transition cylinder 10. The forward-moving gas resists the leakage of gas from the impeller 3 cavity inside the volute 2. By utilizing the spiral guide vanes 13 as the rotor shaft 101 rotates, the gas inside the motor cavity tends to flow towards the gap behind the impeller 3, thereby resisting the entry of gas from the rear side of the impeller 3 into the motor cavity.

[0040] The inner side of the transition cylinder 10 has a tapered hole 12 that gradually decreases in size forward. The gyration radius of the guide vanes 13 also gradually decreases forward, and there is a gap between their outer sides and the tapered hole 12. The combination of the tapered hole 12 and the tapered guide vanes 13 pressurizes the gas in the motor cavity to resist gas leakage from the impeller 3 cavity. The gap between the guide vanes 13 and the tapered hole 12 does not affect the magnetic levitation of the rotor shaft 101 and the impeller 3. The design of the tapered guide vanes 13 and the tapered hole 12 is based on the tapered hole 12's decreasing diameter forward. The guide vanes 13 increase the forward airflow pressure within the tapered hole 12, thereby resisting the greater gas pressure within the impeller 3 cavity. This minimizes gas leakage into the motor cavity through the gap between the tapered hole 12 and the guide vanes 13.

[0041] Several rings of guide ribs 9 are provided on the rear side of the impeller 3. The guide ribs 9 rotate synchronously with the impeller 3, causing the gas to disperse centrifugally. In this embodiment, the guide ribs 9 are connected to the rear side of the second annular plate 5. The guide ribs 9 are plate-shaped structures that are radially inclined to the second annular plate 5. There are four rings of guide ribs 9, with several evenly distributed around the circumference of each ring. The four rings of guide ribs 9 correspond to the four rings of second guide plates 7 and are located on the inner ring side of the corresponding second guide plates 7. The airflow passing through the first guide plate 6 and the second guide plate 7 moves from the inside of the straight portion of the second guide plate 7 towards the center. The driving effect of the guide ribs 9 on the airflow is to move it away from the center, thereby resisting the airflow from moving towards the center and reducing gas leakage. The width of the guide rib 9 is less than half the distance between the first annular plate 4 and the second annular plate 5. Airflow moving towards the center through the first guide plate 6 and the second guide plate 7 can only change direction and move towards the center from the outside of the guide rib 9. The airflow driven by the guide rib 9 weakens the energy leaking from the airflow moving towards the center and reduces the airflow moving towards the inner guide plate group, forming a circulating airflow between adjacent guide plate groups. One first guide plate 6 and one second guide plate 7 form a guide plate group.

[0042] Several centrifugal blades 14 are arranged in a ring on the rear side of the center of the second annular plate 5. The centrifugal blades 14 are evenly arranged in a circle and are vertically connected to the rear side of the second annular plate 5. The centrifugal blades 14 are radially inclined to the second annular plate 5. The rear end of the centrifugal blades 14 is connected to an annular plate structure. The lateral span of the centrifugal blades 14 is greater than half the distance between the first annular plate 4 and the second annular plate 5. The gaps between the centrifugal blades 14 surround the outer side of the core cylinder 11, and the inner side of the annularly distributed centrifugal blades 14 corresponds to the front end of the conical hole 12.

[0043] Centrifugal blades 14 cause the central airflow to diverge and move away from the center, creating a circulating airflow inside the innermost guide vane assembly and resisting gas leakage from the impeller chamber 3 towards the center. The guide ribs 9 and centrifugal blades 14 directly resist gas movement towards the center, thereby reducing gas leakage into the motor cavity. They also create multiple circulating airflows between the rear side of the second annular plate 5 and the front side of the first annular plate 4, forming a multi-ring gas seal. Combined with the labyrinth seal structure of the guide vane assembly, this significantly reduces gas leakage, improves blower output efficiency, and contributes to energy saving and consumption reduction in the blower.

[0044] The first annular plate 4 and the volute 2 are bolted to the front end of the magnetic levitation motor 1. Both the first annular plate 4 and the volute 2 are provided with bolt holes 15 for the bolts to pass through, and the front end of the magnetic levitation motor 1 is provided with threaded holes that mate with the bolts. In this embodiment, the bolt holes 15 on the first annular plate 4 are arranged in two rings, located at the inner edge and outer edge of the first annular plate 4, respectively.

[0045] The second annular plate 5 has several through holes 16 for bolts to pass through completely. Each through hole 16 corresponds one-to-one with a bolt hole 15. The inner diameter of each through hole 16 is larger than that of the bolt hole 15, allowing the bolt head to pass through. The thickness of the bolt head is less than the distance between the first annular plate 4 and the second annular plate 5. Two rings of through holes 16 are arranged on the second annular plate 5, with the outer ring extending to the edge of the second annular plate 5 in a notch-like shape. When installing bolts, rotating the rotor shaft 101 and the second annular plate 5 aligns the through holes 16 with the bolt holes 15, allowing for bolt installation and the fixing of the first annular plate 4 and the volute 2.

[0046] The volute 2 includes an outer shell 201 and a side ring cover 202. The outer shell 201 is tangentially connected to the aforementioned output pipe. The front side of the outer shell 201 has an opening and is connected to the side ring cover 202 via a flange. The inner diameter of the opening on the front side of the outer shell 201 is larger than the outer diameter of the second annular plate 5. The outer diameter of the first annular plate 4 is the same as the outer diameter of the second annular plate 5. The aforementioned input pipe is integrally connected to the inner edge of the side ring cover 202. The locking nut 19 can be installed or removed by disassembling the side ring cover 202, thereby enabling the installation and removal of the impeller 3, the second annular plate 5, and the first annular plate 4.

[0047] The second annular plate 5 is composed of several ring plates connected together, and the second guide plate 7 is connected to the rear side of the outer edge of the ring plate. There are five ring plates. The inner and outer edges of adjacent ring plates are welded together to form a flat second annular plate 5. The innermost ring plate is welded to the outer side of the front end of the core cylinder 11. The inner ring perforation 16 is located on the innermost ring plate, and the outer ring perforation 16 is located on the outermost ring plate. There is no second guide plate 7 on the inner side of the outermost ring plate. During processing, the first guide plate 6 is first welded to the first annular plate 4, and the second guide plate 7 is fitted to the first guide plate 6. The second guide plate 7 is composed of two half-rings welded together to form a circular structure. Then, the ring plates are gradually fitted and welded from the inside to the outside, and the inner edge of the ring plate is welded to the corresponding second guide plate 7.

[0048] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An energy-saving magnetic levitation blower, comprising a magnetic levitation motor (1), a volute (2), and an impeller (3); wherein the volute (2) is sealed to the outer side of the front end of the magnetic levitation motor (1), the magnetic levitation motor (1) includes a rotor shaft (101), the rotor shaft (101) extending forward into the volute (2) and connecting to the impeller (3); characterized in that, The front side of the rear wall of the volute (2) is provided with several annular first guide plates (6), and the rear side of the impeller (3) is provided with several annular second guide plates (7) that cooperate with the first guide plates (6). The edges of the first guide plates (6) and the edges of the second guide plates (7) are curved relative to each other and surround each other with gaps. Several ventilation holes (8) are evenly distributed on the circumference of the second guide plate (7).

2. The energy-saving magnetic levitation blower according to claim 1, characterized in that, The radial sections of the first guide plate (6) and the second guide plate (7) both include straight sections and arc sections, and the arc sections of the first guide plate (6) and the second guide plate (7) are intersected.

3. The energy-saving magnetic levitation blower according to claim 1, characterized in that, The impeller (3) has several rings of guide ribs (9) on its rear side. The guide ribs (9) rotate synchronously with the impeller (3) to cause the gas to disperse centrifugally.

4. The energy-saving magnetic levitation blower according to claim 1, characterized in that, The front side of the rear wall of the volute (2) is sealed with a first annular plate (4) that supports the first guide plate (6). The rear side of the impeller (3) is provided with a second annular plate (5) that supports the second guide plate (7). The second annular plate (5) rotates synchronously with the impeller (3).

5. The energy-saving magnetic levitation blower according to claim 4, characterized in that, The inner rear edge of the first annular plate (4) is connected to a transition cylinder (10), which extends into the inner side of the output end of the magnetic levitation motor (1) and surrounds the rotor shaft (101) with gaps. The inner rear edge of the second annular plate (5) is connected to a core cylinder (11), which rotates synchronously with the impeller (3) and extends to the inner side of the transition cylinder (10). Several spiral guide vanes (13) are evenly distributed on the outer circumference of the core cylinder (11), which rotate synchronously with the impeller (3) to move the gas forward.

6. The energy-saving magnetic levitation blower according to claim 5, characterized in that, The inner side of the transition cylinder (10) has a tapered hole (12) that gradually decreases in size forward, and the radius of rotation of the guide vane (13) gradually decreases in size forward, and there is a gap between the outer side and the tapered hole (12).

7. The energy-saving magnetic levitation blower according to claim 5, characterized in that, The rotor shaft (101) is provided with a step (17), the core cylinder (11) abuts against the front side of the step (17), the impeller (3) seals against the front side of the second annular plate (5), and the front end of the rotor shaft (101) is connected by a threaded locking nut (19) to limit the impeller (3); the outside of the rotor shaft (101) is provided with a key (18), and the inside of the core cylinder (11) and the inside of the impeller (3) are both provided with through grooves that cooperate with the key (18).

8. The energy-saving magnetic levitation blower according to claim 4, characterized in that, The second annular plate (5) has several annularly distributed centrifugal blades (14) on its rear side, and the gaps between the centrifugal blades (14) surround the outer side of the core cylinder (11).

9. The energy-saving magnetic levitation blower according to claim 4, characterized in that, The first annular plate (4) and the volute (2) are connected to the front end of the magnetic levitation motor (1) by bolts, and the second annular plate (5) is provided with several through holes (16) for the bolts to pass through completely.

10. The energy-saving magnetic levitation blower according to claim 4, characterized in that, The second annular plate (5) is formed by connecting several annular plates, and the second guide plate (7) is connected to the rear side of the outer edge of the annular plate.

Images