A permanent magnet variable frequency Roots blower

Abstract

The present invention discloses a permanent magnet variable frequency Roots blower, which includes a housing, a first drive motor, a driving shaft, a magnetic levitation bearing seat, a first impeller, an air outlet and a dust removal and heat dissipation mechanism. The first drive motor, the magnetic levitation bearing seat, the air outlet and the dust removal and heat dissipation mechanism are all fixedly connected to the housing. The output end of the first drive motor is fixedly connected to the driving shaft. The driving shaft is rotationally connected to the magnetic levitation bearing seat, and the driving shaft is in transmission connection with the first impeller. The present invention relates to the technical field of Roots blowers. By means of the magnetic levitation bearing, the friction loss during transmission is reduced, the dust existing in the air flow is screened out, and it is avoided that particles enter between the impellers to cause impeller wear and affect the air blowing efficiency. At the same time, it is avoided that the lubricating oil is polluted, resulting in a reduction in the lubricating effect and the heat dissipation effect. The blower is actively cooled to avoid overheating, damage and deformation of the impeller.

Description

Technical Field

[0001] The present invention relates to the technical field of Roots blowers, and in particular to a permanent magnet variable frequency Roots blower. Background Art

[0002] The principle of a Roots blower is a rotary compressor that uses two lobe-shaped rotors to move relative to each other in a cylinder to compress and transport gas. This type of blower has a simple structure and is easy to manufacture. It is widely used in aquaculture for oxygenation, sewage treatment for aeration, cement transportation, and is more suitable for gas transportation and pressurization systems in low-pressure situations. It can also be used as a vacuum pump, etc.

[0003] When the Roots blower is blowing air, impurities entering the interior can cause wear on the two groups of impellers, resulting in an increase in the relative gap between the impellers, affecting the air-blowing efficiency. At the same time, dust will cause fouling of the lubricating oil between the impellers, leading to a reduction in lubrication and heat dissipation efficiency. Additionally, there is a problem that the impellers can become overheated and deformed during long-term operation. Summary of the Invention

[0004] The purpose of the present invention is to provide one, so as to solve the problems raised in the above background art.

[0005] To solve the above technical problems, the present invention provides the following technical solution: A permanent magnet variable frequency Roots blower includes a housing, a first drive motor, a driving shaft, a magnetic levitation bearing housing, a first impeller, an air outlet, and a dust removal and heat dissipation mechanism. The first drive motor, the magnetic levitation bearing housing, the air outlet, and the dust removal and heat dissipation mechanism are all fixedly connected to the housing. The output end of the first drive motor is fixedly connected to the driving shaft. The driving shaft is rotationally connected to the magnetic levitation bearing housing, and the driving shaft is in transmission connection with the first impeller.

[0006] This Roots blower inputs gas into the housing through the dust removal and heat dissipation mechanism. The first drive motor outputs torque to the driving shaft. The driving shaft and the magnetic levitation bearing housing rotate relative to each other through magnetic levitation. The first drive motor drives the first impeller to rotate through the driving shaft. The two relatively rotating first impellers compress air, causing the air to be blown out from the air outlet, achieving the function of blowing air. When the dust removal and heat dissipation mechanism is admitting air, it can screen out the dust existing in the air flow, preventing particles from entering between the two first impellers, causing wear on the first impellers and affecting the air-blowing efficiency of the blower. At the same time, the entry of dust into the interior of the blower can cause fouling of the lubricating oil, reducing the lubrication effect and heat dissipation effect. After the blower finishes working, the dust removal and heat dissipation mechanism can actively dissipate heat from the blower, preventing the first impellers of the blower from being overheated, damaged, and deformed.

[0007] Furthermore, the dust removal and heat dissipation mechanism includes an air duct, a cylindrical shell, an air intake mechanism, an opening and closing mechanism, a wind expansion mechanism, and a two-way impeller mechanism. The housing and the air duct are both fixedly connected to the cylindrical shell. The air intake mechanism is fixedly connected to the air duct. The opening and closing mechanism is fixedly connected to the cylindrical shell. The wind expansion mechanism is fixedly connected to the air intake mechanism. The two-way impeller mechanism is fixedly connected to the wind expansion mechanism.

[0008] The gas enters through the air duct. The air inlet mechanism first detects the dust content in the gas, and then inputs the gas into the cylinder shell. When impurities are detected in the gas, the air expanding mechanism is in the air expanding state, and the gas entering downwards from the air duct will be blown in all directions. The two-way impeller mechanism provides an upward lifting force for the gas expanding in all directions, the opening and closing mechanism opens, and the dust gas is discharged from the side wall; when no impurities are detected in the gas, the air expanding mechanism is in the air gathering state, and the gas entering downwards from the air duct will gather towards the axis, the opening and closing mechanism closes, and the two-way impeller mechanism blows the gathered gas into the machine shell; when active heat dissipation of the fan is required, the air expanding mechanism is in the air gathering state, the two-way impeller mechanism pumps the overheated gas in the machine shell into the cylinder shell, the air inlet mechanism pumps the cooling gas in the air duct into the cylinder shell, the overheated gas is neutralized with the cooling gas along the wind surface slope formed by the air expanding mechanism, the opening and closing mechanism opens, and the gas is discharged from the side wall.

[0009] Furthermore, the air inlet mechanism includes a mounting plate, a second driving motor, a connecting column, a second impeller and a dust detector. The mounting plate is fixedly connected to the air duct, the second driving motor and the dust detector are both fixedly connected to the mounting plate, the output end of the second driving motor is in transmission connection with the connecting column, and the connecting column is fixedly connected to the second impeller and the air expanding mechanism.

[0010] The dust detector detects the dust content in the air flow in the air duct. The second driving motor outputs torque to the connecting column, drives the second impeller to rotate through the connecting column, the second impeller rotates to input the gas in the air duct into the cylinder shell, and the connecting column transmits torque to drive the air expanding mechanism to rotate.

[0011] Furthermore, the opening and closing mechanism includes a first servo motor, a first gear, an inner circular rail, a toothed ring, a baffle and a mounting ring. The first servo motor and the mounting ring are both fixedly connected to the cylinder shell, the output end of the first servo motor is in transmission connection with the first gear, the first gear is meshed with the tooth surface of the toothed ring, the toothed ring is rotatably connected to the inner circular rail, a chute is provided on the toothed ring, the chute is slidably connected to the baffle, and the baffle is rotatably connected to the mounting ring.

[0012] When impurities are detected in the gas, the first servo motor outputs torque to the first gear, the tooth surface of the first gear meshes with the toothed ring, drives the toothed ring to rotate a certain angle along the inner circular rail, drives the baffle to rotate around the mounting ring through the chute on the toothed ring, so that the cylinder shell communicates with the outside, and the dust gas is discharged from the side wall. Through the reciprocation of the toothed ring, the opening and closing of the baffle are controlled.

[0013] Furthermore, the air expanding mechanism includes a pushing cylinder, a top plate, a ring column, a main rod, a bottom plate, an upper expanding mechanism, a spring arc plate, a connecting cylinder, and a lower expanding mechanism. The pushing cylinder is fixedly connected to both the connecting column and the top plate. The output end of the pushing cylinder is fixedly connected to the ring column. The ring column is fixedly connected to the upper expanding mechanism. The connecting cylinder is fixedly connected to both the upper expanding mechanism and the lower expanding mechanism. The upper expanding mechanism is fixedly connected to the top plate. The lower expanding mechanism is fixedly connected to the bottom plate. The upper expanding mechanism, the connecting cylinder, and the lower expanding mechanism are all slidably connected to the main rod. The upper expanding mechanism and the lower expanding mechanism have the same structure. The spring arc plate is hinged to both the upper expanding mechanism and the lower expanding mechanism. The main rod is fixedly connected to the bottom plate. The bottom plate is fixedly connected to the two-way impeller mechanism.

[0014] When the air expanding mechanism is in the air expanding state, the radius of the virtual circle formed by the upper expanding mechanism is smaller than the radius of the virtual circle of the lower expanding mechanism. The spring arc plate hinged to the upper expanding mechanism and the lower expanding mechanism is in an inclined state with the upper end offset towards the axis. The inner arc surface of the spring arc plate faces the rotation direction of the whole air expanding mechanism. The gas entering the cylinder shell from above is thrown to the surroundings under the drive of the rotation of the inner arc surface. When the air expanding mechanism is in the air gathering state, the pushing cylinder pulls back the upper expanding mechanism. The upper expanding mechanism fixes the lower expanding mechanism through the connecting cylinder. The upper expanding mechanism approaches the top plate, and the lower expanding mechanism moves away from the bottom plate. The radius of the virtual circle formed by the upper expanding mechanism is larger than the radius of the virtual circle of the lower expanding mechanism. The spring arc plate is in an inclined state with the lower end offset towards the axis. The gas entering the cylinder shell from above is gathered and transported from the upper virtual circle to the lower virtual circle under the gathering of the inner arc surface rotation, and the gas is output to the machine shell by the two-way impeller mechanism. When active heat dissipation is carried out, the gas is output from the machine shell to the cylinder shell by the two-way impeller mechanism, and the gas expands to the surroundings along the virtual wind surface with the lower end offset towards the axis formed by the spring arc plate.

[0015] Furthermore, the upper expanding mechanism includes a telescopic rod, a double-headed hinge seat, a connecting rod, and a hinge ring seat. There are several groups of telescopic rods, and several groups of telescopic rods are evenly distributed along the circumference of the top plate. The telescopic rod is fixedly connected to the double-headed hinge seat. The hinge ring seat is fixedly connected to the connecting cylinder. The connecting rod is hinged to both the double-headed hinge seat and the hinge ring seat. The double-headed hinge seat is hinged to the spring arc plate.

[0016] The pushing cylinder pulls back the hinge ring seat upwards. Due to the hinge relationship among the double-headed hinge seat, the connecting rod, and the hinge ring seat, the double-headed hinge seat moves away from the pushing cylinder in the direction of stretching the telescopic rod, and the radius of the virtual circle formed by the double-headed hinge seat increases. On the contrary, the radius of the virtual circle of the lower expanding mechanism decreases. Finally, the radius of the virtual circle formed by the upper expanding mechanism is larger than the radius of the virtual circle of the lower expanding mechanism.

[0017] Furthermore, the two-way impeller mechanism includes an internal torsion mechanism, a rotating blade, an inner ring, and a reverse impeller. The internal torsion mechanism is fixedly connected to both the bottom plate and the rotating blade. The rotating blade is rotatably connected to the inner ring. The reverse impeller is fixedly connected to the inner ring.

[0018] When the two-way impeller mechanism inputs gas from the cylinder shell to the casing, the inner arc surface of the rotating blade faces downward, and the gas is input from the cylinder shell to the casing along the outer arc surface of the rotating blade. The inner arc surface of the reverse impeller is fixedly upward, continuously inputting an upward air flow to the outer circle; when active heat dissipation is carried out, the inner torsion mechanism outputs torque to the rotating blade, and the rotating blade rotates until the inner arc surface faces upward, and the gas is input from the casing to the cylinder shell.

[0019] Further, the inner torsion mechanism includes a housing, a second servo motor, bevel gears, a bevel gear table and a bevel gear head. The housing is fixedly connected to the bottom plate and the second servo motor. The output end of the second servo motor is in transmission connection with the bevel gear. The bevel gear is meshed with the tooth surface of the bevel gear table. The bevel gear table is rotatably connected to the housing. The bevel gear table is meshed with the tooth surface of the bevel gear head. A through hole is provided on the housing, and the bevel gear head is rotatably connected to the through hole. The bevel gear head is fixedly connected to the rotating blade.

[0020] When active heat dissipation is carried out, the second servo motor outputs torque to the bevel gear. Through the meshing of the tooth surfaces of the bevel gear and the bevel gear table, the bevel gear table rotates around the axis of the housing as the center. Through the meshing of the tooth surfaces of the bevel gear table and the bevel gear head, the torque is transmitted to the bevel gear head. The bevel gear head rotates 180 degrees in the through hole, so that the rotating blade rotates until the inner arc surface faces upward.

[0021] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention designs a dust removal and heat dissipation mechanism. The dust detector first detects the dust content. When impurities are detected, the air expansion mechanism is in the air expansion state, and the gas is blown in all directions. The bidirectional impeller mechanism provides an upward lifting force for the gas expanding in all directions, and the dust is discharged from the side wall; when no impurities are detected, the air expansion mechanism is in the air gathering state, and the gas entering from the air duct will gather towards the axis and be blown into the casing to screen the dust, preventing particles from entering between the two first impellers and causing wear of the first impeller and affecting the air blowing efficiency of the fan; when actively dissipating heat from the fan, in the air gathering state, the bidirectional impeller mechanism pumps the overheated gas in the casing into the cylinder shell, and the air inlet mechanism pumps the cooling gas into the cylinder shell. The overheated gas is neutralized with the cooling gas along the wind surface slope formed by the air expansion mechanism, and the gas is discharged from the side wall, preventing the first impeller of the fan from being damaged, deformed due to overheating; the present invention designs an air expansion mechanism. In the air expansion state, the radius of the virtual circle formed by the upper expansion mechanism is smaller than that of the lower expansion mechanism, and the spring arc plate is in an inclined state with the upper end offset towards the axis. The inner arc surface of the spring arc plate faces the rotation direction of the overall air expansion mechanism, and the gas entering the cylinder shell is thrown in all directions under the drive of the rotation of the inner arc surface; in the air gathering state, the push cylinder is adjusted so that the radius of the virtual circle formed by the upper expansion mechanism is larger than that of the lower expansion mechanism, and the spring arc plate is in an inclined state with the lower end offset towards the axis. The gas entering the cylinder shell is gathered and conveyed from the upper end to the lower end to the casing under the gathering of the inner arc surface rotation; during active heat dissipation, the gas is output from the casing to the cylinder shell, expands in all directions along the virtual wind surface with the lower end offset towards the axis formed by the spring arc plate, is neutralized with the cooling gas, and the inclination angle of the spring arc plate is self-adjusted through the air expansion mechanism to form virtual wind surfaces with different inclination angles to cooperate with the bidirectional impeller mechanism to achieve the functions of dust removal and temperature reduction; the present invention reduces the frictional loss during transmission through a magnetic levitation bearing, screens the dust existing in the air flow, prevents particles from entering between the impellers and causing impeller wear and affecting the air blowing efficiency, and at the same time prevents lubricating oil from being contaminated and reducing the lubrication effect and heat dissipation effect, actively dissipates heat from the fan, and prevents the impeller from being damaged and deformed due to overheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the drawings:

[0023] Figure 1 is the overall structural schematic diagram of the present invention;

[0024] Figure 2 is the structural schematic diagram of the dust removal and heat dissipation mechanism of the present invention;

[0025] Figure 3 is the structural schematic diagram of the air inlet mechanism of the present invention;

[0026] Figure 4It is a schematic structural diagram of the opening and closing mechanism of the present invention;

[0027] Figure 5 It is a schematic structural diagram of the air expansion mechanism of the present invention;

[0028] Figure 6 It is a schematic structural diagram of the upper expansion mechanism of the present invention;

[0029] Figure 7 It is a schematic structural diagram of the two-way impeller mechanism of the present invention;

[0030] Figure 8 is Figure 7 a partial enlarged schematic diagram of region A of

[0031] In the figure: 1. Housing; 2. First driving motor; 3. Driving shaft; 4. Magnetic suspension bearing seat; 5. First impeller; 6. Air outlet; 7. Dust removal and heat dissipation mechanism; 71. Air duct; 72. Cylindrical shell; 73. Air inlet mechanism; 731. Mounting plate; 732. Second driving motor; 733. Connecting column; 734. Second impeller; 735. Dust detector; 74. Opening and closing mechanism; 741. First servo motor; 742. First gear; 743. Inner circular rail; 744. Tooth ring; 745. Slide groove; 746. Baffle; 747. Mounting ring; 75. Air expansion mechanism; 751. Pushing cylinder; 752. Top plate; 753. Ring column; 754. Main rod; 755. Bottom plate; 756. Upper expansion mechanism; 7561. Telescopic rod; 7562. Double-headed hinge seat; 7563. Connecting rod; 7564. Hinge ring seat; 757. Spring arc plate; 758. Connecting cylinder; 759. Lower expansion mechanism; 76. Two-way impeller mechanism; 761. Inner torsion mechanism; 7641. Outer shell; 7642. Second servo motor; 7643. Bevel gear; 7644. Bevel gear table; 7645. Bevel gear head; 7646. Through hole; 762. Rotating blade; 763. Inner ring; 764. Reverse impeller. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] The present invention provides a technical solution:

[0034] As Figure 1As shown in the figure, the blower includes a casing 1, a first driving motor 2, a driving shaft 3, a magnetic levitation bearing seat 4, a first impeller 5, an air outlet 6, and a dust removal and heat dissipation mechanism 7. The first driving motor 2, the magnetic levitation bearing seat 4, the air outlet 6, and the dust removal and heat dissipation mechanism 7 are all fixedly connected to the casing 1. The output end of the first driving motor 2 is fixedly connected to the driving shaft 3. The driving shaft 3 is rotatably connected to the magnetic levitation bearing seat 4, and the driving shaft 3 is drivingly connected to the first impeller 5.

[0035] This Roots blower inputs gas into the casing 1 through the dust removal and heat dissipation mechanism 7. The first driving motor 2 outputs torque to the driving shaft 3. The driving shaft 3 and the magnetic levitation bearing seat 4 rotate relative to each other through magnetic levitation. The first driving motor 2 drives the first impeller 5 to rotate through the driving shaft 3. The two sets of relatively rotating first impellers 5 compress air, causing the air to be blown out from the air outlet 6, achieving the function of blowing air. When the dust removal and heat dissipation mechanism 7 intakes air, it can screen out the dust existing in the air flow, preventing particles from entering between the two sets of first impellers 5, causing wear of the first impellers 5 and affecting the blowing efficiency of the blower. At the same time, the entry of dust into the blower will cause the lubricating oil to become contaminated, reducing the lubrication effect and heat dissipation effect. After the blower finishes working, the dust removal and heat dissipation mechanism 7 can actively dissipate heat from the blower, preventing the first impellers 5 of the blower from overheating, being damaged, and deformed.

[0036] As Figure 2 As shown in the figure, the dust removal and heat dissipation mechanism 7 includes an air duct 71, a cylindrical shell 72, an air intake mechanism 73, an opening and closing mechanism 74, a wind expansion mechanism 75, and a two-way impeller mechanism 76. The casing 1 and the air duct 71 are both fixedly connected to the cylindrical shell 72. The air intake mechanism 73 is fixedly connected to the air duct 71. The opening and closing mechanism 74 is fixedly connected to the cylindrical shell 72. The wind expansion mechanism 75 is fixedly connected to the air intake mechanism 73. The two-way impeller mechanism 76 is fixedly connected to the wind expansion mechanism 75.

[0037] The gas enters through the air duct 71. The air intake mechanism 73 first detects the dust content in the gas and then inputs the gas into the cylindrical shell 72. When impurities are detected in the gas, the wind expansion mechanism 75 is in a wind expansion state. The gas entering downward from the air duct 71 will be blown in all directions. The two-way impeller mechanism 76 provides an upward lifting force for the gas expanding in all directions. The opening and closing mechanism 74 opens, and the dusty gas is discharged from the side wall; when no impurities are detected in the gas, the wind expansion mechanism 75 is in a wind gathering state. The gas entering downward from the air duct 71 will gather towards the axis. The opening and closing mechanism 74 closes, and the two-way impeller mechanism 76 blows the gathered gas into the casing 1; when the blower needs to be actively cooled, the wind expansion mechanism 75 is in a wind gathering state. The two-way impeller mechanism 76 pumps the overheated gas in the casing 1 into the cylindrical shell 72. The air intake mechanism 73 pumps the cooling gas in the air duct 71 into the cylindrical shell 72. The overheated gas neutralizes with the cooling gas along the wind surface slope formed by the wind expansion mechanism 75. The opening and closing mechanism 74 opens, and the gas is discharged from the side wall.

[0038] AsFigure 3 As shown, the air inlet mechanism 73 includes a mounting plate 731, a second drive motor 732, a connecting column 733, a second impeller 734, and a dust detector 735. The mounting plate 731 is fixedly connected to the air duct 71. The second drive motor 732 and the dust detector 735 are both fixedly connected to the mounting plate 731. The output end of the second drive motor 732 is in transmission connection with the connecting column 733. The connecting column 733 is fixedly connected to both the second impeller 734 and the air diffusing mechanism 75.

[0039] The dust detector 735 detects the dust content in the air flow in the air duct 71. The second drive motor 732 outputs torque to the connecting column 733, drives the second impeller 734 to rotate through the connecting column 733. The second impeller 734 rotates to input the gas in the air duct 71 into the cylinder shell 72. The connecting column 733 transmits torque to drive the air diffusing mechanism 75 to rotate.

[0040] As Figure 4 shown, the opening and closing mechanism 74 includes a first servo motor 741, a first gear 742, an inner circular rail 743, a toothed ring 744, a baffle 746, and a mounting ring 747. The first servo motor 741 and the mounting ring 747 are both fixedly connected to the cylinder shell 72. The output end of the first servo motor 741 is in transmission connection with the first gear 742. The first gear 742 is in meshing engagement with the tooth surface of the toothed ring 744. The toothed ring 744 is rotatably connected to the inner circular rail 743. A chute 745 is provided on the toothed ring 744. The chute 745 is in sliding connection with the baffle 746. The baffle 746 is rotatably connected to the mounting ring 747.

[0041] When impurities are detected in the gas, the first servo motor 741 outputs torque to the first gear 742. The first gear 742 meshes with the tooth surface of the toothed ring 744, drives the toothed ring 744 to rotate a certain angle along the inner circular rail 743, drives the baffle 746 to rotate around the mounting ring 747 through the chute 745 on the toothed ring 744, so that the cylinder shell 72 communicates with the outside, and the dust gas is discharged from the side wall. The opening and closing of the baffle 746 is controlled by the reciprocation of the toothed ring 744.

[0042] As Figure 5As shown in the figure, the wind expanding mechanism 75 includes a pushing cylinder 751, a top plate 752, a ring column 753, a main rod 754, a bottom plate 755, an upper expanding mechanism 756, a spring arc plate 757, a connecting cylinder 758 and a lower expanding mechanism 759. The pushing cylinder 751 is fixedly connected to both the connecting column 733 and the top plate 752. The output end of the pushing cylinder 751 is fixedly connected to the ring column 753. The ring column 753 is fixedly connected to the upper expanding mechanism 756. The connecting cylinder 758 is fixedly connected to both the upper expanding mechanism 756 and the lower expanding mechanism 759. The upper expanding mechanism 756 is fixedly connected to the top plate 752. The lower expanding mechanism 759 is fixedly connected to the bottom plate 755. The upper expanding mechanism 756, the connecting cylinder 758 and the lower expanding mechanism 759 are all slidably connected to the main rod 754. The upper expanding mechanism 756 and the lower expanding mechanism 759 have the same structure. The spring arc plate 757 is hinged to both the upper expanding mechanism 756 and the lower expanding mechanism 759. The main rod 754 is fixedly connected to the bottom plate 755. The bottom plate 755 is fixedly connected to the two-way impeller mechanism 76.

[0043] When the wind expanding mechanism 75 is in the wind expanding state, the radius of the virtual circle formed by the upper expanding mechanism 756 is smaller than the radius of the virtual circle of the lower expanding mechanism 759. The spring arc plate 757 hinged to the upper expanding mechanism 756 and the lower expanding mechanism 759 is in an inclined state with the upper end offset towards the axis. The inner arc surface of the spring arc plate 757 faces the rotation direction of the whole wind expanding mechanism 75. The gas entering the cylinder shell 72 from above is thrown to the surroundings under the drive of the rotation of the inner arc surface. When the wind expanding mechanism 75 is in the wind gathering state, the pushing cylinder 751 pulls back the upper expanding mechanism 756. The upper expanding mechanism 756 fixes the lower expanding mechanism 759 through the connecting cylinder 758. The upper expanding mechanism 756 approaches the top plate 752, and the lower expanding mechanism 759 moves away from the bottom plate 755. The radius of the virtual circle formed by the upper expanding mechanism 756 is larger than the radius of the virtual circle of the lower expanding mechanism 759. The spring arc plate 757 is in an inclined state with the lower end offset towards the axis. The gas entering the cylinder shell 72 from above is gathered and conveyed from the upper virtual circle to the lower virtual circle under the gathering of the inner arc surface rotation, and the gas is output to the machine shell 1 by the two-way impeller mechanism 76. When active heat dissipation is carried out, the gas is output from the machine shell 1 to the cylinder shell 72 by the two-way impeller mechanism 76, and the gas expands around along the virtual wind surface with the lower end offset towards the axis formed by the spring arc plate 757.

[0044] As Figure 6 shown in the figure, the upper expanding mechanism 756 includes a telescopic rod 7561, a double-headed hinge seat 7562, a connecting rod 7563 and a hinge ring seat 7564. There are several groups of telescopic rods 7561, and several groups of telescopic rods 7561 are evenly distributed along the circumference of the top plate 752. The telescopic rod 7561 is fixedly connected to the double-headed hinge seat 7562. The hinge ring seat 7564 is fixedly connected to the connecting cylinder 758. The connecting rod 7563 is hinged to both the double-headed hinge seat 7562 and the hinge ring seat 7564. The double-headed hinge seat 7562 is hinged to the spring arc plate 757.

[0045] The pushing cylinder 751 pulls the articulated ring seat 7564 upward. Due to the articulated relationship among the double-headed articulated seat 7562, the connecting rod 7563, and the articulated ring seat 7564, the double-headed articulated seat 7562 moves away from the pushing cylinder 751 through the telescopic movement of the telescopic rod 7561. The radius of the virtual circle formed by the double-headed articulated seat 7562 increases, while the radius of the virtual circle of the lower expansion mechanism 759 decreases. Eventually, the radius of the virtual circle formed by the upper expansion mechanism 756 is greater than that of the lower expansion mechanism 759.

[0046] As Figure 7 shown in the figure, the two-way impeller mechanism 76 includes an internal torsion mechanism 761, a rotating blade 762, an inner ring 763, and a reverse impeller 764. The internal torsion mechanism 761 is fixedly connected to both the bottom plate 755 and the rotating blade 762. The rotating blade 762 is rotatably connected to the inner ring 763, and the reverse impeller 764 is fixedly connected to the inner ring 763.

[0047] When the two-way impeller mechanism 76 inputs gas from the cylinder shell 72 to the machine shell 1, the inner arc surface of the rotating blade 762 faces downward, and the gas is input from the cylinder shell 72 to the machine shell 1 along the outer arc surface of the rotating blade 762. The inner arc surface of the reverse impeller 764 is fixedly upward, continuously inputting an upward air flow to the outer circle. When actively dissipating heat, the internal torsion mechanism 761 outputs torque to the rotating blade 762, and the rotating blade 762 rotates until its inner arc surface faces upward, inputting the gas from the machine shell 1 to the cylinder shell 72.

[0048] As Figure 8 shown in the figure, the internal torsion mechanism 761 includes a housing 7641, a second servo motor 7642, a bevel gear 7643, a bevel gear platform 7644, and a bevel gear head 7645. The housing 7641 is fixedly connected to both the bottom plate 755 and the second servo motor 7642. The output end of the second servo motor 7642 is in transmission connection with the bevel gear 7643. The bevel gear 7643 is in tooth surface engagement with the bevel gear platform 7644. The bevel gear platform 7644 is rotatably connected to the housing 7641. The bevel gear platform 7644 is in tooth surface engagement with the bevel gear head 7645. A through hole 7646 is provided on the housing 7641. The bevel gear head 7645 is rotatably connected to the through hole 7646, and the bevel gear head 7645 is fixedly connected to the rotating blade 762.

[0049] When actively dissipating heat, the second servo motor 7642 outputs torque to the bevel gear 7643. Through the tooth surface engagement of the bevel gear 7643 and the bevel gear platform 7644, the bevel gear platform 7644 rotates around the axis of the housing 7641. Through the tooth surface engagement of the bevel gear platform 7644 and the bevel gear head 7645, the torque is transmitted to the bevel gear head 7645. The bevel gear head 7645 rotates 180 degrees in the through hole 7646, causing the rotating blade 762 to rotate until its inner arc surface faces upward.

[0050] Working principle of the present invention: This Roots blower inputs gas into the casing 1 through the dust removal and heat dissipation mechanism 7. The first driving motor 2 outputs torque to the driving shaft 3. The driving shaft 3 and the magnetic levitation bearing housing 4 rotate relative to each other through magnetic levitation. The first driving motor 2 drives the first impeller 5 to rotate through the driving shaft 3. The two groups of first impellers 5 that rotate relative to each other compress air, so that the air is blown out from the air outlet 6 to achieve the function of blowing air. The dust content in the air flow in the air duct 71 is detected by the dust detector 735, and then the gas is input into the cylinder shell 72. When impurities are detected in the gas, the virtual circle radius formed by the upper expansion mechanism 756 is smaller than the virtual circle radius of the lower expansion mechanism 759. The spring arc plate 757 hinged to the upper expansion mechanism 756 and the lower expansion mechanism 759 is in an inclined state with the upper end offset towards the axis. The inner arc surface of the spring arc plate 757 faces the rotation direction of the overall air expansion mechanism 75. The gas entering the cylinder shell 72 from the air duct 71 is thrown to the surroundings under the drive of the rotation of the inner arc surface. The two-way impeller mechanism 76 provides a downward lifting force for the gas expanding to the surroundings. The opening and closing mechanism 74 opens, and the dust gas is discharged from the side wall; when no impurities are detected in the gas, the air expansion mechanism 75 is in a wind-gathering state. The gas entering from the air duct 71 downward will gather towards the axis. The opening and closing mechanism 74 closes, and the two-way impeller mechanism 76 blows the gathered gas into the casing 1; when active heat dissipation of the blower is required, the air expansion mechanism 75 is in a wind-gathering state. The gas is output from the casing 1 to the cylinder shell 72 by the two-way impeller mechanism 76. The gas expands to the surroundings along the virtual wind surface formed by the spring arc plate 757 with the lower end offset towards the axis. The air inlet mechanism 73 pumps the cooling gas in the air duct 71 into the cylinder shell 72. The overheated gas is neutralized with the cooling gas along the wind surface slope formed by the air expansion mechanism 75. The opening and closing mechanism 74 opens, and the gas is discharged from the side wall.

[0051] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0052] Finally, it should be noted that the above are only 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 modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A permanent magnet variable frequency Roots blower, characterized in that: The blower includes a casing (1), a first driving motor (2), a driving shaft (3), a magnetic suspension bearing seat (4), a first impeller (5), an air outlet (6), and a dust removal and heat dissipation mechanism (7). The first driving motor (2), the magnetic suspension bearing seat (4), the air outlet (6), and the dust removal and heat dissipation mechanism (7) are all fixedly connected to the casing (1). The output end of the first driving motor (2) is fixedly connected to the driving shaft (3). The driving shaft (3) is rotatably connected to the magnetic suspension bearing seat (4). The driving shaft (3) is in transmission connection with the first impeller (5). The dust removal and heat dissipation mechanism (7) includes an air duct (71), a cylindrical shell (72), an air inlet mechanism (73), an opening and closing mechanism (74), a wind expansion mechanism (75), and a two-way impeller mechanism (76). The casing (1) and the air duct (71) are both fixedly connected to the cylindrical shell (72). The air inlet mechanism (73) is fixedly connected to the air duct (71). The opening and closing mechanism (74) is fixedly connected to the cylindrical shell (72). The wind expansion mechanism (75) is fixedly connected to the air inlet mechanism (73). The two-way impeller mechanism (76) is fixedly connected to the wind expansion mechanism (75). The air inlet mechanism (73) includes a mounting plate (731), a second driving motor (732), a connecting column (733), a second impeller (734), and a dust detector (735). The mounting plate (731) is fixedly connected to the air duct (71). The second driving motor (732) and the dust detector (735) are both fixedly connected to the mounting plate (731). The output end of the second driving motor (732) is in transmission connection with the connecting column (733). The connecting column (733) is fixedly connected to both the second impeller (734) and the wind expansion mechanism (75). The wind expansion mechanism (75) includes a pushing cylinder (751), a top plate (752), an annular column (753), a main rod (754), a bottom plate (755), an upper expansion mechanism (756), a spring arc plate (757), a connecting cylinder (758), and a lower expansion mechanism (759). The pushing cylinder (751) is fixedly connected to both the connecting column (733) and the top plate (752). The output end of the pushing cylinder (751) is fixedly connected to the annular column (753). The annular column (753) is fixedly connected to the upper expansion mechanism (756). The connecting cylinder (758) is fixedly connected to both the upper expansion mechanism (756) and the lower expansion mechanism (759). The upper expansion mechanism (756) is fixedly connected to the top plate (752). The lower expansion mechanism (759) is fixedly connected to the bottom plate (755). The upper expansion mechanism (756), the connecting cylinder (758), and the lower expansion mechanism (759) are all slidably connected to the main rod (754). The upper expansion mechanism (756) and the lower expansion mechanism (759) have the same structure. The spring arc plate (757) is hinged to both the upper expansion mechanism (756) and the lower expansion mechanism (759). The main rod (754) is fixedly connected to the bottom plate (755). The bottom plate (755) is fixedly connected to the two-way impeller mechanism (76). The opening and closing mechanism (74) includes a first servo motor (741), a first gear (742), an inner circular rail (743), a toothed ring (744), a baffle (746) and a mounting ring (747). The first servo motor (741) and the mounting ring (747) are both fixedly connected to the cylinder shell (72). The output end of the first servo motor (741) is in transmission connection with the first gear (742). The first gear (742) is in meshing engagement with the tooth surface of the toothed ring (744). The toothed ring (744) is rotatably connected to the inner circular rail (743). A chute (745) is provided on the toothed ring (744). The chute (745) is in sliding connection with the baffle (746). The baffle (746) is rotatably connected to the mounting ring (747). The upper expansion mechanism (756) includes a telescopic rod (7561), a double-headed hinge seat (7562), a connecting rod (7563) and a hinge ring seat (7564). There are several groups of the telescopic rods (7561). The several groups of telescopic rods (7561) are evenly distributed along the circumference of the top plate (752). The telescopic rod (7561) is fixedly connected to the double-headed hinge seat (7562). The hinge ring seat (7564) is fixedly connected to the connecting cylinder (758). The connecting rod (7563) is hinged to both the double-headed hinge seat (7562) and the hinge ring seat (7564). The double-headed hinge seat (7562) is hinged to the spring arc plate (757).

2. The permanent magnet variable frequency Roots blower according to claim 1, characterized in that: The two-way impeller mechanism (76) includes an internal torsion mechanism (761), a rotating blade (762), an inner ring (763) and a reverse impeller (764). The internal torsion mechanism (761) is fixedly connected to both the bottom plate (755) and the rotating blade (762). The rotating blade (762) is rotatably connected to the inner ring (763). The reverse impeller (764) is fixedly connected to the inner ring (763).

3. The permanent magnet variable frequency Roots blower according to claim 2, characterized in that: The internal torsion mechanism (761) includes a housing (7641), a second servo motor (7642), a bevel gear (7643), a bevel gear table (7644) and a bevel gear head (7645). The housing (7641) is fixedly connected to both the bottom plate (755) and the second servo motor (7642). The output end of the second servo motor (7642) is in transmission connection with the bevel gear (7643). The bevel gear (7643) is in meshing engagement with the tooth surface of the bevel gear table (7644). The bevel gear table (7644) is rotatably connected to the housing (7641). The bevel gear table (7644) is in meshing engagement with the bevel gear head (7645). A through hole (7646) is provided on the housing (7641). The bevel gear head (7645) is rotatably connected to the through hole (7646). The bevel gear head (7645) is fixedly connected to the rotating blade (762).

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