CN113819077A - Magnetic suspension air blower with single-stage double-suction and double stator and rotor - Google Patents
Magnetic suspension air blower with single-stage double-suction and double stator and rotor Download PDFInfo
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- CN113819077A CN113819077A CN202111001149.8A CN202111001149A CN113819077A CN 113819077 A CN113819077 A CN 113819077A CN 202111001149 A CN202111001149 A CN 202111001149A CN 113819077 A CN113819077 A CN 113819077A
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- 239000000725 suspension Substances 0.000 title claims description 19
- 238000005339 levitation Methods 0.000 claims abstract 12
- 230000001681 protective effect Effects 0.000 claims description 30
- 238000007789 sealing Methods 0.000 claims description 14
- 230000017525 heat dissipation Effects 0.000 claims description 12
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 238000005452 bending Methods 0.000 abstract description 12
- 238000005299 abrasion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
- F04D17/105—Centrifugal pumps for compressing or evacuating with double suction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
- F04D29/058—Bearings magnetic; electromagnetic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
- F04D29/444—Bladed diffusers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/5806—Cooling the drive system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
- F04D29/584—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps cooling or heating the machine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/60—Shafts
- F05D2240/61—Hollow
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Electromagnetism (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
本发明涉及鼓风机领域，尤其涉及一种单级双吸、双定转子的磁悬浮鼓风机。该鼓风机包括双吸蜗壳、第一机壳、第二机壳、电机轴和双吸叶轮；第一机壳和第二机壳分别固定在双吸蜗壳两侧，双吸叶轮固定在电机轴上；第一机壳和第二机壳都设置有定位孔，并且两者的定位孔都固定嵌设有电机定子和径向磁轴承；电机轴包括第一轴段和第二轴段；第一轴段和第二轴段都固定设置有电机转子和轴承转子，并且两者的电机转子和轴承转子分别与第一机壳和第二机壳的电机定子启动端和径向磁轴承支撑端位置相对应；该鼓风机减小叶轮对电机轴中心产生的弯矩，增加了驱动力，并且增加了电机轴使用寿命。
The invention relates to the field of blowers, in particular to a magnetic levitation blower with single-stage double suction and double stator and rotor. The blower includes a double suction volute, a first casing, a second casing, a motor shaft and a double suction impeller; the first casing and the second casing are respectively fixed on both sides of the double suction volute, and the double suction impeller is fixed on the motor on the shaft; both the first casing and the second casing are provided with positioning holes, and both the positioning holes are fixedly embedded with a motor stator and a radial magnetic bearing; the motor shaft includes a first shaft segment and a second shaft segment; Both the first shaft segment and the second shaft segment are fixedly provided with a motor rotor and a bearing rotor, and the motor rotor and bearing rotor of the two are respectively supported with the motor stator starting end and the radial magnetic bearing of the first casing and the second casing. The end positions correspond; the blower reduces the bending moment generated by the impeller on the center of the motor shaft, increases the driving force, and increases the service life of the motor shaft.
Description
Technical Field
The invention relates to the field of blowers, in particular to a magnetic suspension blower with single stage, double suction and double stators and rotors.
Background
The magnetic suspension blower is a mechanical device for compressing and conveying gas, and is a high-tech, green, energy-saving and environment-friendly product manufactured by adopting core technologies such as advanced magnetic suspension bearings, three-dimensional flow turbines, high-speed permanent magnet motors, high-speed variable frequency speed regulation, intelligent monitoring control and the like. Because the magnetic suspension blower utilizes an active magnetic suspension bearing system and carries out non-contact and non-abrasion suspension support on the blower through controllable electromagnetic force, redundant transmission links are not needed between a rotor and an impeller, the rotating speed of the magnetic suspension blower is far greater than that of the traditional blower, and meanwhile, the effects of successfully conveying gas, no abrasion, low noise, no lubrication and the like of a machine can be achieved.
The Chinese utility model patent application (publication No. CN207761977U, published: 20180824) discloses a high-speed direct-drive double-suction centrifugal blower unit for VPSA gas separation, which comprises a centrifugal blower head and a high-speed asynchronous motor, wherein the centrifugal blower head is divided into two groups, the two groups are respectively arranged at two ends of the high-speed asynchronous motor, the centrifugal blower head comprises a centrifugal open impeller, an impeller housing, a diffuser, an exhaust volute and a labyrinth gas seal, a rotating shaft connected with a main shaft of the high-speed asynchronous motor through a shaft coupling penetrates through the middle of the impeller housing, the utility model discloses a rotor of the high-speed asynchronous motor is respectively provided with two centrifugal blowers at two ends, the high-speed asynchronous motor is determined to have the best rotating speed by a control system according to the inlet temperature and the pressure ratio of the blowers, and drives the high-speed asynchronous variable frequency motor through a communication frequency converter with the high-speed asynchronous motor, the rotor has small rotational inertia, fast variable speed response time, large single machine flow, high efficiency, low noise and simple later maintenance.
The prior art has the following defects: in the traditional magnetic suspension blower, two impellers are respectively arranged on the left side and the right side of a motor shaft, and a single motor stator and a motor rotor are arranged between the two impellers and are used for driving the two impellers simultaneously; the time distance between the two impellers on the left side and the right side of the motor shaft is large, and when the two impellers generate pressure on the motor shaft due to the impact of high-pressure gas, the two impellers with the longer distance generate a large bending moment on the center of the motor shaft according to the amplification effect of the lever principle; thereby increasing the load borne by the motor shaft and being not beneficial to the stable operation of the whole equipment. Meanwhile, a large driving force is needed for driving the two impellers, and the driving force is small when the single motor stator and the motor rotor are adopted for simultaneously driving the two impellers; moreover, the driving position of the stator of the single motor is positioned between the two impellers, and the position is the maximum bending deformation position of the motor shaft; where the application of a large driving force tends to cause the motor shaft to bend, thereby reducing the service life of the motor shaft.
Disclosure of Invention
The purpose of the invention is: aiming at the problems, the double-suction impeller with smaller distance is arranged in the middle of the motor shaft, so that the bending moment of the impeller to the center of the motor shaft is reduced; meanwhile, the motor stator and the motor rotor are arranged on the left side and the right side of the double-suction impeller and used for driving the two impellers simultaneously so as to increase the driving force, and the motor stator generating the larger driving force is not positioned at the position of the middle part of the motor shaft, which is easy to deform, so that the service life of the motor shaft is prolonged.
In order to achieve the purpose, the invention adopts the following technical scheme:
a magnetic suspension blower with single stage, double suction and double stators and rotors comprises a double suction volute, a first casing, a second casing, a motor shaft and a double suction impeller; the first casing and the second casing are respectively fixed on two sides of the double-suction volute, and the double-suction impeller is fixed on the motor shaft; the double-suction impeller comprises an impeller body, a first blade and a second blade, the double-suction volute is provided with a volute channel communicated with the outside, and the first blade and the second blade are arranged back to back and are both positioned in the volute channel; the first machine shell and the second machine shell are both provided with positioning holes, and the positioning holes of the first machine shell and the second machine shell are both fixedly embedded with a motor stator and a radial magnetic bearing; the motor shaft comprises a first shaft section and a second shaft section; the first shaft section and the second shaft section are both fixedly provided with a motor rotor and a bearing rotor, and the motor rotor and the bearing rotor of the first shaft section and the second shaft section respectively correspond to the starting end of the motor stator and the supporting end of the radial magnetic bearing of the first casing and the second casing; the positioning hole of the second casing is also fixedly embedded with an axial magnetic bearing, the second shaft section is also fixedly provided with a thrust disc, and the limiting ends of the two axial magnetic bearings are respectively positioned at the two axial sides of the thrust disc.
Preferably, the double-suction volute comprises a volute body, a first volute current collector and a second volute current collector, wherein the first volute current collector and the second volute current collector are fixed on two sides of the volute body; the first volute current collector and the second volute current collector are respectively located on the outer sides of the first blade and the second blade and are used for guiding gas entering the first blade and the second blade, and flow field efficiency is improved.
Preferably, a diffuser is arranged in the volute passage and located between the air outlet end of the first blade and the air outlet end of the second blade, and the diffuser is used for guiding the air flow output by the first blade and the air flow output by the second blade, so that the flow field efficiency is improved.
Preferably, the first volute collector and the second volute collector are both provided with sealing blocks, the sealing blocks are respectively located at the radial outer sides of the air inlet ends of the first blade and the second blade, and the sealing blocks are used for preventing high-pressure air at the air outlet ends of the first blade and the second blade from flowing back to the air inlet ends.
Preferably, O-ring seals are arranged between the first volute collector and the volute body, between the second volute collector and the volute body, between the first volute collector and the first housing, and between the second volute collector and the second housing; the O-shaped sealing ring is used for sealing the connection part between each part and preventing the air inside the blower from leaking to the outside.
Preferably, the impeller body is provided with an axial threaded hole, and the first shaft section and the second shaft section are both provided with screw holes penetrating axially; the plurality of screws respectively penetrate through the screw holes of the first shaft section and the second shaft section and are respectively screwed with the threaded holes of the impeller body so as to respectively screw the first shaft section and the second shaft section to the impeller body.
Preferably, the magnetic suspension blower further comprises a radial-axial sensor, and a plurality of silicon steel sheets stacked along the axial direction are sleeved on the outer walls of the first shaft section and the second shaft section; a plurality of footpath axial direction sensors are located first casing and second casing respectively to footpath axial direction sensor's response end is aligned with the stacked silicon steel sheet in relevant position respectively.
Preferably, the outer end face of the first casing and the outer end face of the second casing are respectively and fixedly provided with a first protection bearing seat and a second protection bearing seat, and the magnetic suspension blower is further provided with a protection bearing; the plurality of protective bearings are respectively sleeved on the outer walls of the first shaft section and the second shaft section and are respectively arranged in the inner holes of the first protective bearing seat and the second protective bearing seat; the outer ring of the protective bearing is in interference fit with inner holes of the first protective bearing seat and the second protective bearing seat, and a gap exists between the inner ring of the protective bearing and the outer walls of the first shaft section and the second shaft section.
Preferably, fairings are arranged on the outer sides of the first protective bearing seat and the second protective bearing seat and used for guiding sucked air, so that the air inlet efficiency is improved; the first shell and the second shell are both provided with air inlet channels which axially penetrate through the first shell and the second shell, and the air inlet channels are positioned outside the positioning apertures; one end of the air inlet channel of the first shell is communicated with the outside, and the other end of the air inlet channel of the first shell is communicated with the air inlet end of the first blade.
Preferably, the fairing is provided with a first channel which penetrates through the fairing in the axial direction, the first protection bearing seat and the second protection bearing seat are both provided with second channels which penetrate through the fairing in the axial direction, and the inner sides of the first casing and the second casing are both provided with third channels which penetrate through the fairing in the radial direction and are communicated with the air inlet channels; the first shaft section and the second shaft section are provided with fourth channels which penetrate through the first shaft section and the second shaft section in the radial direction and are communicated with the screw holes; a first channel in the first casing, a second channel of the first protective bearing seat, a gap between a motor stator and a motor rotor in the first casing, a gap between a radial magnetic bearing and a bearing rotor in the first casing, and a third channel of the first casing are communicated with an air inlet channel in the first casing to form a first heat dissipation channel; a first channel in the second casing, a second channel of the second protection bearing seat, a gap between a motor stator and a motor rotor in the second casing, a gap between a radial magnetic bearing and a bearing rotor in the second casing, a gap between an axial magnetic bearing and a thrust disc, and a third channel of the second casing are communicated with an air inlet channel in the second casing to form a second heat dissipation channel; the first channel in the first machine shell, the screw hole of the first shaft section, the fourth channel of the first shaft section, the third channel in the first machine shell and the air inlet channel in the first machine shell are communicated to form a third heat dissipation channel; the first channel in the second machine shell, the screw hole of the second shaft section, the fourth channel of the second shaft section, a gap between the axial magnetic bearing and the thrust disc, and the third channel of the second machine shell are communicated with the air inlet channel in the second machine shell to form a fourth heat dissipation channel.
The magnetic suspension blower adopting the technical scheme has the advantages that:
during operation, the motor stators in the first casing and the second casing drive the motor rotors in the first casing and the second casing simultaneously, so as to drive the motor shaft to rotate simultaneously, and then the rotating double-suction impeller compresses air and discharges along the volute channel to complete the working process of the magnetic suspension air blower. In the mode, the double-suction impellers in a back-to-back mode are arranged in the middle of the motor shaft, and the first blades and the second blades are closer to each other, so that the condition that a larger bending moment is generated due to the larger distance between the two impellers is avoided, and the bending moment generated by the impellers to the center of the motor shaft is reduced; thereby reducing the load borne by the motor shaft and ensuring the stable operation of the whole equipment. Meanwhile, the first casing and the second casing are both provided with a motor stator and a motor rotor, namely two driving devices are used for driving the double-suction impeller simultaneously, so that the driving force for the double-suction impeller is increased; moreover, the motor stator and the motor rotor in the first casing and the motor stator and the motor rotor in the second casing are respectively positioned at the left side and the right side of the motor shaft and are not positioned at the position where the middle part of the motor shaft is easy to deform; the motor stator in the first machine shell and the motor stator in the second machine shell generate driving force in the same direction to the motor shaft, so that the directions of bending moments generated to the center of the motor shaft are opposite to each other, and a part of bending moments can be offset; thereby further reducing the influence on the deformation of the motor shaft and prolonging the service life of the motor shaft.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2-4 are schematic structural views of the double suction impeller.
Fig. 5 is a schematic view of a double-suction volute.
Fig. 6 and 7 are schematic structural diagrams of the first shaft segment and the second shaft segment, respectively.
FIG. 8 is a schematic view of a fairing configuration.
Fig. 9 is a schematic structural view of the first protective bearing seat.
Fig. 10-12 are schematic structural views of the first housing.
Fig. 13-15 are schematic structural views of the second housing.
FIG. 16 is a schematic view of the structure of the cooling channel of the present invention.
17-O-shaped sealing ring and 85-casing guide vane.
Detailed Description
The following describes in detail embodiments of the present invention with reference to the drawings.
Example 1
1-5, the blower comprises a double-suction volute 1, a first casing 2, a second casing 3, a motor shaft 4 and a double-suction impeller 5; the first machine shell 2 and the second machine shell 3 are respectively fixed on two sides of the double-suction volute 1, and the double-suction impeller 5 is fixed on the motor shaft 4; the double-suction impeller 5 comprises an impeller body 51, a first blade 52 and a second blade 53, the double-suction volute 1 is provided with a volute channel 14 communicated with the outside, and the first blade 52 and the second blade 53 are arranged back to back and are both positioned in the volute channel 14; the first machine shell 2 and the second machine shell 3 are both provided with positioning holes 21, and the positioning holes 21 of the first machine shell and the second machine shell are both fixedly embedded with a motor stator 22 and a radial magnetic bearing 23; the motor shaft 4 comprises a first shaft section 41 and a second shaft section 42; the first shaft section 41 and the second shaft section 42 are both fixedly provided with a motor rotor 44 and a bearing rotor 45, and the motor rotor 44 and the bearing rotor 45 of the two respectively correspond to the starting end of the motor stator 22 and the supporting end of the radial magnetic bearing 23 of the first casing 2 and the second casing 3; the positioning hole 21 of the second housing 3 is further fixedly embedded with an axial magnetic bearing 24, the second shaft section 42 is further fixedly provided with a thrust disc 46, and the limiting ends of the two axial magnetic bearings 24 are respectively located at two axial sides of the thrust disc 46. In operation, the motor stators 22 in the first housing 2 and the second housing 3 simultaneously drive the motor rotors 44 in the two housings, so as to simultaneously drive the motor shaft 4 to rotate, and then the rotating double-suction impeller 5 compresses air and discharges the air along the volute channel 14 to complete the working process of the magnetic suspension blower. In this way, the double-suction impellers 5 in a back-to-back manner are arranged in the middle of the motor shaft 4, and the first blades 52 and the second blades 53 are closer to each other, so that the situation that a large bending moment is generated due to the fact that the distance between the two impellers is large is avoided, and the bending moment generated by the impellers to the center of the motor shaft 4 is reduced; thereby reducing the load borne by the motor shaft 4 and ensuring the stable operation of the whole equipment. Meanwhile, the motor stator 22 and the motor rotor 44 are arranged in the first casing 2 and the second casing 3, that is, two driving devices are provided to drive the double-suction impeller 5 simultaneously, so that the driving force for the double-suction impeller 5 is increased; moreover, the motor stator 22 and the motor rotor 44 in the first housing 2 and the motor stator 22 and the motor rotor 44 in the second housing 3 are respectively located at the left and right sides of the motor shaft 4, and are not located at a position where the middle of the motor shaft 4 is easily deformed; and the motor stator 22 in the first housing 2 and the motor stator 22 in the second housing 3 generate driving force in the same direction to the motor shaft 4, so that the directions of the bending moments generated to the center of the motor shaft 4 are opposite to each other to offset a part of the bending moments; thereby further reducing the influence on the deformation of the motor shaft 4 and increasing the service life of the motor shaft 4.
The double-suction volute 1 comprises a volute body 11, a first volute current collector 12 and a second volute current collector 13, wherein the first volute current collector 12 and the second volute current collector 13 are fixed on two sides of the volute body 11; the first volute collector 12 and the second volute collector 13 are respectively located outside the first vane 52 and the second vane 53, and the first volute collector 12 and the second volute collector 13 are used for guiding gas entering the first vane 52 and the second vane 53, so that the flow field efficiency is improved.
A diffuser 15 is arranged in the volute passage 14, the diffuser 15 is located between the air outlet end of the first blade 52 and the air outlet end of the second blade 53, and the diffuser 15 is used for guiding the air flow output by the first blade 52 and the second blade 53, so that the flow field efficiency is improved.
The first volute collector 12 and the second volute collector 13 are both provided with a sealing block 16, the sealing block 16 is respectively located at the radial outer sides of the air inlet ends of the first vane 52 and the second vane 53, and the sealing block 16 is used for preventing high-pressure gas at the air outlet ends of the first vane 52 and the second vane 53 from flowing back to the air inlet ends.
As shown in fig. 1 and 5, O-ring seals are disposed between the first volute collector 12 and the volute body 11, between the second volute collector 13 and the volute body 11, between the first volute collector 12 and the first casing 2, and between the second volute collector 13 and the second casing 3; the O-shaped sealing ring is used for sealing the connection part between each part and preventing the air inside the blower from leaking to the outside.
As shown in fig. 5-7, the impeller body 51 is provided with an axial threaded bore 54, and both the first shaft section 41 and the second shaft section 42 are provided with an axial through threaded bore 47; a plurality of screws are inserted through the screw holes 47 of the first and second shaft segments 41 and 42, respectively, and are screwed into the screw holes 54 of the impeller body 51, respectively, to screw the first and second shaft segments 41 and 42 to the impeller body 51, respectively.
As shown in fig. 1, the magnetic suspension blower further includes a radial-axial sensor 6, and the outer walls of the first shaft section 41 and the second shaft section 42 are sleeved with a plurality of silicon steel sheets stacked along the axial direction; the plurality of radial and axial sensors 6 are respectively positioned in the first machine shell 2 and the second machine shell 3, and the sensing ends of the radial and axial sensors 6 are respectively aligned with the silicon steel sheets stacked at corresponding positions. The radial and axial sensor 6 controls the radial and axial positions of the motor shaft 4 by sensing the radial and axial positions of the silicon steel sheet and transmitting them to the radial and axial magnetic bearings 23 and 24.
A first protective bearing seat 71 and a second protective bearing seat 72 are respectively fixedly arranged on the outer side end face of the first machine case 2 and the outer side end face of the second machine case 3, and a protective bearing 73 is further arranged on the magnetic suspension blower; a plurality of protective bearings 73 are respectively sleeved on the outer walls of the first shaft section 41 and the second shaft section 42 and respectively arranged in the inner holes of the first protective bearing seat 71 and the second protective bearing seat 72; the outer ring of the protective bearing 73 is in interference fit with the inner holes of the first protective bearing seat 71 and the second protective bearing seat 72, and a gap exists between the inner ring of the protective bearing 73 and the outer walls of the first shaft section 41 and the second shaft section 42. When the equipment is suddenly powered off or stopped, the radial magnetic bearing 23 and the axial magnetic bearing 24 lose magnetic force and can not support and limit the motor shaft 4, and at the moment, the motor shaft 4 falls down and contacts with the inner ring of the protective bearing 73 to be supported by the protective bearing 73; thereby avoiding the damage of important parts such as the radial magnetic bearing 23 and the axial magnetic bearing 24 caused by the sudden falling of the motor shaft 4 when the motor is suddenly powered off or stopped.
As shown in fig. 1 and fig. 8 to 9, cowlings 74 are disposed outside the first protective bearing seat 71 and outside the second protective bearing seat 72, and the cowlings 74 are used for guiding the sucked air to improve the air intake efficiency; the first machine shell 2 and the second machine shell 3 are both provided with air inlet channels 25 which axially penetrate through, and the air inlet channels 25 are positioned on the radial outer sides of the positioning holes 21; one end of the air inlet channel 25 of the first housing 2 and the second housing 3 is communicated with the outside, and the other end is communicated with the air inlet end of the first blade 52 and the second blade 53. The external air is introduced into the air inlet ends of the first and second vanes 52 and 53 through the air inlet passage 25 to be compressed, and then discharged along the scroll passage 14.
As shown in fig. 1 and 16, the fairing 74 is provided with a first channel 81 passing through axially, the first protective bearing seat 71 and the second protective bearing seat 72 are provided with a second channel 82 passing through axially, and the inner side of the first casing 2 and the inner side of the second casing 3 are provided with a third channel 83 passing through radially and communicating with the air inlet channel 25; both the first shaft section 41 and the second shaft section 42 are provided with a fourth passage 84 radially penetrating and communicating with the screw hole 47; a first channel 81 in the first housing 2, a second channel 82 of the first protective bearing seat 71, a gap between the motor stator 22 and the motor rotor 44 in the first housing 2, a gap between the radial magnetic bearing 23 and the bearing rotor 45 in the first housing 2, a third channel 83 of the first housing 2 and the air inlet channel 25 in the first housing 2 are communicated to form a first heat dissipation channel; a first channel 81 in the second housing 3, a second channel 82 of the second protective bearing seat 72, a gap between the motor stator 22 and the motor rotor 44 in the second housing 3, a gap between the radial magnetic bearing 23 and the bearing rotor 45 in the second housing 3, a gap between the axial magnetic bearing 24 and the thrust disc 46, and a third channel 83 of the second housing 3 are communicated with the air inlet channel 25 in the second housing 3 to form a second heat dissipation channel; the first channel 81 in the first chassis 2, the screw hole 47 of the first shaft section 41, the fourth channel 84 of the first shaft section 41, the third channel 83 in the first chassis 2 and the air inlet channel 25 in the first chassis 2 are communicated to form a third heat dissipation channel; the first channel 81 in the second housing 3, the screw hole 47 of the second shaft section 42, the fourth channel 84 of the second shaft section 42, the gap between the axial magnetic bearing 24 and the thrust disc 46, the third channel 83 of the second housing 3 and the air inlet channel 25 in the second housing 3 are communicated to form a fourth heat dissipation channel.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111001149.8A CN113819077A (en) | 2021-08-30 | 2021-08-30 | Magnetic suspension air blower with single-stage double-suction and double stator and rotor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111001149.8A CN113819077A (en) | 2021-08-30 | 2021-08-30 | Magnetic suspension air blower with single-stage double-suction and double stator and rotor |
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| CN113819077A true CN113819077A (en) | 2021-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111001149.8A Pending CN113819077A (en) | 2021-08-30 | 2021-08-30 | Magnetic suspension air blower with single-stage double-suction and double stator and rotor |
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| CN116658458A (en) * | 2023-05-29 | 2023-08-29 | 鑫磊压缩机股份有限公司 | A double-motor impeller structure |
| CN118242301A (en) * | 2024-05-20 | 2024-06-25 | 季华实验室 | Axial-flow centrifugal combined magnetic suspension air compressor |
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| CN118242301B (en) * | 2024-05-20 | 2024-08-09 | 季华实验室 | Axial-flow centrifugal combined magnetic suspension air compressor |
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