CN116538110B - Magnetic suspension air compressor - Google Patents
Magnetic suspension air compressor Download PDFInfo
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- CN116538110B CN116538110B CN202310731804.8A CN202310731804A CN116538110B CN 116538110 B CN116538110 B CN 116538110B CN 202310731804 A CN202310731804 A CN 202310731804A CN 116538110 B CN116538110 B CN 116538110B
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- magnetic bearing
- heat dissipation
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- air outlet
- air inlet
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- 239000000725 suspension Substances 0.000 title claims abstract description 30
- 230000017525 heat dissipation Effects 0.000 claims abstract description 120
- 238000005339 levitation Methods 0.000 claims abstract description 24
- 238000006073 displacement reaction Methods 0.000 claims description 17
- 230000009471 action Effects 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 230000006835 compression Effects 0.000 description 11
- 238000007906 compression Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Classifications
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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
-
- 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
-
- 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
- F04D17/12—Multi-stage pumps
-
- 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
-
- 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
- F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
- F04D25/163—Combinations of two or more pumps ; Producing two or more separate gas flows driven by a common gearing arrangement
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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
-
- 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
-
- 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
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/09—Structural association with bearings with magnetic bearings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention relates to a magnetic suspension air compressor, which comprises a magnetic suspension motor, wherein the magnetic suspension motor is internally provided with a first impeller and a second impeller, the two ends of a rotor are respectively connected with the first impeller, the outside of the first impeller is provided with a first volute, and the outside of the second impeller is provided with a second volute; the air inlet end of the first volute is communicated with the air inlet pipeline, a first air outlet and a second air outlet are formed in the shell of the magnetic levitation motor, and the first air outlet and the second air outlet are communicated with the air inlet pipeline, so that a negative pressure environment is generated in the shell; baffle rings are arranged in the first air outlet and the second air outlet and used for drainage, so that the first magnetic bearing component and the second magnetic bearing component are cooled. According to the invention, the shell is communicated with the air inlet pipeline of the air compressor, so that a negative pressure environment is generated in the shell; through the water conservancy diversion effect of backing ring, realize the abundant heat dissipation to magnetic bearing part, effectively solved the insufficient problem of heat dissipation of the inside subassembly of magnetic suspension air compressor.
Description
Technical Field
The invention relates to a magnetic suspension air compressor, and belongs to the field of cooling of air compressors.
Background
The compression modes of the air compressor comprise a primary compression mode and a secondary compression mode, and the pressure generated by the secondary compression is high. Compared with the traditional double-screw secondary compression air compressor system, the magnetic suspension air compressor secondary compression system has the advantages of high efficiency, no mechanical friction, low power consumption, low noise and no need of adopting lubricating oil.
In the working process of the magnetic suspension air compressor, particularly the stator, the rotor and the magnetic bearing in the magnetic suspension motor can generate heat, but the current heat dissipation mode cannot more effectively realize heat dissipation of the internal components, and particularly the heat dissipation of the radial magnetic bearing, the displacement sensor and the axial magnetic bearing is insufficient, so that the stable operation of the magnetic suspension air compressor is affected.
Therefore, the heat dissipation problem of the magnetic levitation air compressor is still a big problem to be solved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the magnetic suspension air compressor, which enables the interior of the shell to generate a negative pressure environment by communicating the shell with an air inlet pipeline of the air compressor, and the problem of insufficient heat dissipation of internal components of the magnetic suspension air compressor is effectively solved by fully dissipating heat of a radial magnetic bearing, a displacement sensor and an axial magnetic bearing through the flow guiding function of a baffle ring.
The technical scheme of the invention is as follows:
the magnetic suspension air compressor comprises a magnetic suspension motor, wherein the magnetic suspension motor comprises a rotor, and a first magnetic bearing component, a stator and a second magnetic bearing component which are sequentially sleeved outside the rotor;
the two ends of the rotor are respectively connected with a first impeller and a second impeller, a first volute is arranged outside the first impeller, and a second volute is arranged outside the second impeller;
the air inlet end of the first volute is communicated with the air inlet pipeline, a first air outlet, a second air outlet, a first air inlet and a second air inlet are formed in the shell of the magnetic levitation motor, and the first air outlet and the second air outlet are communicated with the air inlet pipeline, so that a negative pressure environment is generated in the shell, and the magnetic levitation motor is cooled; baffle rings are arranged in the first air outlet and the second air outlet and used for drainage, so that the first magnetic bearing component and the second magnetic bearing component are cooled.
According to the invention, a first connecting pipe is arranged among the first air outlet, the second air outlet and the air inlet pipeline, and a first heat exchanger is arranged on the first connecting pipe.
According to the invention, the air inlet pipeline comprises a first air inlet pipeline, a gradual change pipeline and a second air inlet pipeline which are communicated with each other, the diameter of the first air inlet pipeline is smaller than that of the second air inlet pipeline, and the first connecting pipe is communicated with the second air inlet pipeline.
According to a preferred embodiment of the present invention, the first magnetic bearing member includes an axial magnetic bearing, a first radial position sensor, and a first radial magnetic bearing, which are sequentially disposed between the first impeller and the stator.
According to the invention, the first radial magnetic bearing is fixed on the first radial magnetic bearing seat, the axial magnetic bearing is fixed on the axial magnetic bearing seat, the axial magnetic bearing seat can be selectively fixed on the inner side of the first radial magnetic bearing seat, and the first radial magnetic bearing seat is fixed on the inner side of the shell;
the first radial magnetic bearing seat is provided with a first heat dissipation channel, the first heat dissipation channel comprises a first heat dissipation hole, a second heat dissipation hole and a third heat dissipation hole which are communicated with each other, the first heat dissipation hole and the second heat dissipation hole are parallel to the radial direction of the rotor, and the third heat dissipation hole is perpendicular to the first heat dissipation hole and the second heat dissipation hole; the first radiating hole is formed between the first radial position sensor and the first radial magnetic bearing, and the second radiating hole is formed between the first radial position sensor and the axial magnetic bearing;
the axial magnetic bearing seat is provided with a fourth heat dissipation through hole; the fourth heat dissipation through hole penetrates through the axial magnetic bearing seat;
under the action of negative pressure suction force, wind is sucked from the first air inlet, flows into the third heat dissipation hole under the flow guide of the baffle ring, and part of wind enters the first heat dissipation hole, flows into the first heat dissipation hole close to the first air outlet through the gap between the first radial magnetic bearing and the first radial displacement sensor, flows into the third heat dissipation hole through the flow guide of the baffle ring, and finally enters the first air outlet;
the other part of wind enters the second heat dissipation hole, passes through the gap between the axial magnetic bearing and the first radial displacement sensor and the fourth heat dissipation through hole, then enters the fourth heat dissipation through hole and the second heat dissipation hole which are arranged close to the first air outlet, passes through the third heat dissipation hole, passes through the flow guide of the baffle ring, and is sucked out from the first air outlet;
and the air is sucked in from the first air inlet, passes through the gap between the first radial magnetic bearing and the stator under the flow guide of the baffle ring, and is finally sucked out from the first air outlet.
According to a preferred embodiment of the present invention, the second magnetic bearing member includes a second radial magnetic bearing and a second radial position sensor, which are disposed in sequence between the second impeller and the stator.
According to the invention, the second radial magnetic bearing is fixed on a second radial magnetic bearing seat, and the second radial magnetic bearing seat is connected with the shell and the second volute;
the second radial magnetic bearing seat is provided with a second heat dissipation channel, the second heat dissipation channel comprises a fifth heat dissipation hole and a sixth heat dissipation hole which are communicated with each other, the fifth heat dissipation hole is a through hole, and the sixth heat dissipation hole is arranged between the second radial magnetic bearing and the second radial position sensor;
under the action of negative pressure suction force, wind is sucked in by the second air inlet, flows down through the baffle ring, enters the fifth heat dissipation hole, a part of wind enters the sixth heat dissipation hole, passes through the gap between the second radial magnetic bearing and the second radial displacement sensor, enters the sixth heat dissipation hole close to the second air outlet, passes through the fifth heat dissipation hole, flows through the baffle ring, and is sucked out by the second air outlet; after passing through the fifth heat dissipation hole, the other part of wind passes through the side surface of the second radial displacement sensor, which is far away from the first radial magnetic bearing, and enters the fifth heat dissipation hole, which is arranged close to the second air outlet, and is sucked out from the second air outlet through the flow guide of the baffle ring;
and after the air is sucked in from the second air inlet, the air passes through the gap between the second radial magnetic bearing and the stator and the gap between the rotor and the stator under the flow guide of the baffle ring, finally passes through the gap between the first radial magnetic bearing and the stator, and finally is sucked out from the second air outlet.
According to the invention, the first air outlet and the first air inlet are arranged between the first radial magnetic bearing and the stator, and the second air outlet are arranged between the second radial magnetic bearing and the stator.
According to the invention, the cross section of the baffle ring is L-shaped, the outer ring of the baffle ring is also provided with two fixing plates which are used for being fixed in the first air outlet or the second air outlet, and the inner ring of the baffle ring is fixed on the first radial magnetic bearing seat or the second radial magnetic bearing seat, so that a part of wind flows through the first heat dissipation channel or the second heat dissipation channel under the negative pressure environment of the air inlet pipeline.
The beneficial effects of the invention are as follows:
1. according to the invention, the shell is communicated with the air inlet pipeline of the magnetic suspension air compressor, so that a negative pressure environment is generated in the shell, wind enters through the first air inlet or the second air inlet under the action of negative pressure suction force and is discharged through the first air outlet or the second air outlet, and an external fan or a coaxial fan is not required to be arranged, so that the length of the rotor can be shortened, the volume of the magnetic suspension air compressor is reduced, and meanwhile, the heat dissipation mode is more energy-saving and environment-friendly.
2. Through the water conservancy diversion effect of backing ring, realize radial magnetic bearing, displacement sensor and axial magnetic bearing's abundant heat dissipation, effectively solved the insufficient problem of heat dissipation of magnetic suspension air compressor inner assembly. Meanwhile, the rotor and the stator inside the magnetic suspension air compressor can be fully cooled, and the efficient and stable operation of the magnetic suspension air compressor is facilitated.
Drawings
Fig. 1 is a schematic diagram of a complete machine structure of magnetic levitation air compression provided by the invention.
Fig. 2 is a schematic diagram of a magnetic levitation air compressed host structure according to the present invention.
Fig. 3 is a partial enlarged view of the area a in fig. 2.
Fig. 4 is a partial enlarged view of the region B in fig. 2.
Fig. 5 is a schematic structural view of a baffle ring according to the present invention.
FIG. 6 is a schematic view of an interface of A-A of the baffle ring provided by the present invention.
1. The rotor, 2, the stator, 3, the first radial magnetic bearing, 4, the second radial magnetic bearing, 5, the axial magnetic bearing, 6, the first impeller, 7, the second impeller, 8, the first spiral case, 9, the second spiral case, 10, the air inlet pipeline, 11, the first heat exchanger, 12, the baffle ring, 13, the first air outlet, 14, the second air outlet, 15, the first radial magnetic bearing seat, 16, the second radial magnetic bearing seat, 17, the axial magnetic bearing seat, 18, the first radial displacement sensor, 19, the second radial displacement sensor, 20, the second heat exchanger, 21, the first air inlet, 22, the second air inlet, 23, the cabinet, 24, the fixed plate, 25, the second heat dissipation hole, 26, the first heat dissipation hole, 27, the third heat dissipation hole, 28, the fifth heat dissipation hole, 29 and the sixth heat dissipation hole.
Detailed Description
The following description of the several embodiments of the present application, while clearly and fully describing the embodiments of the present invention, is provided by way of illustration, and is not intended to limit the invention to the particular embodiments disclosed, but to limit the scope of the invention to all other embodiments available to one of ordinary skill in the art without inventive faculty based on the embodiments disclosed herein.
Unless a direction is defined solely, the directions of up, down, left, right, etc. referred to herein are all directions of up, down, left, right, etc. as shown in fig. 2 of the embodiment of the present application, and if the specific gesture changes, the directional indication changes accordingly. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Furthermore, in various embodiments of the present disclosure, the same or similar reference numerals denote the same or similar components.
In the present invention, unless explicitly specified and limited otherwise, the terms "coupled," "affixed," and the like are to be construed broadly, and for example, "coupled" may be either fixedly coupled, detachably coupled, or integrally formed, unless otherwise explicitly specified. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of the claimed invention.
Example 1
The embodiment provides a magnetic suspension air compressor, as shown in fig. 1 and 2, the magnetic suspension air compressor comprises a cabinet 23, and a magnetic suspension motor, a first impeller 6, a first volute 8, a second impeller 7, a second volute 9, a first heat exchanger 11 and a second heat exchanger 20 which are arranged in the cabinet 23, wherein the magnetic suspension motor comprises a rotor 1, and a first magnetic bearing component, a stator 2 and a second magnetic bearing component which are sequentially sleeved outside the rotor 1;
the two ends of the rotor 1 are respectively connected with a first impeller 6 and a second impeller 7, a first volute 8 is arranged outside the first impeller 6, and a second volute 9 is arranged outside the second impeller 7; the first scroll casing 8 communicates with the second scroll casing 9, and a second heat exchanger 20 is provided between the first scroll casing 8 and the second scroll casing 9.
The air inlet end of the first volute 8 is communicated with the air inlet pipeline 10, a first air outlet 13, a second air outlet 14, a first air inlet 21 and a second air inlet 22 are formed in the shell of the magnetic levitation motor, and the first air outlet 13 and the second air outlet 14 are communicated with the air inlet pipeline 10, so that a negative pressure environment is generated in the shell, and the magnetic levitation motor is cooled; baffle rings 12 are arranged in the first air outlet 13 and the second air outlet 14 and used for guiding flow to realize cooling of the first magnetic bearing component and the second magnetic bearing component.
The working method of the magnetic suspension air compressor comprises the following steps: external gas enters the cabinet 23 through an air inlet arranged on the cabinet 23, enters an air inlet of the first volute 8 through an air inlet pipeline 10 and a current collector, realizes primary compression through the first impeller 6, is output by an air outlet of the first volute 8, and then the gas after primary compression firstly passes through the first heat exchanger 11 to reduce the temperature of the gas before secondary compression, then enters the second volute 9, realizes secondary compression through the second impeller 7, and is conveyed to the outside of the cabinet 23 through a gas pipeline, so that the gas reaches the use environment. Because the air inlet pipeline 10 presents a negative pressure environment, the inside of the casing presents a negative pressure environment, and under the action of the negative pressure environment, cooling air enters from the first air inlet 21 and the second air inlet 22, so that the rotor 1 and the stator 2 in the magnetic levitation motor are cooled, and the baffle ring 12 can split the sucked air, so that the first magnetic bearing component and the second magnetic bearing component are cooled.
Example 2
The present embodiment provides a magnetic levitation air compressor, which is different from embodiment 1 in that:
as shown in fig. 2, a first connection pipe is provided between the first air outlet 13, the second air outlet 14 and the air intake duct 10, and a first heat exchanger 11 is provided on the first connection pipe. Since the sucked air from the inside of the casing has a certain temperature, in order to prevent the sucked air from the inside of the casing from affecting the intake temperature of the first scroll case 8, the influence on the intake temperature of the first-stage compressed gas can be effectively avoided by providing the first heat exchanger 11.
Example 3
This embodiment provides a magnetic levitation air compressor, which differs from embodiment 2 in that:
as shown in fig. 2, the intake duct 10 includes a first intake duct 10, a gradual change duct, and a second intake duct 10 that communicate with each other, the first intake duct 10 having a smaller diameter than the second intake duct 10, and a first connection pipe communicating with the second intake duct 10. Because the heat that magnetic suspension air compressor produced is great, in order to reach the effect of anticipated self-priming cooling, through setting up first intake pipe 10, gradual change pipeline's design, can increase one-level air inlet flow, promote self-priming refrigerated suction.
Example 4
The present embodiment provides a magnetic levitation air compressor, which is different from embodiment 1 in that:
the first magnetic bearing component comprises an axial magnetic bearing 5, a first radial position sensor and a first radial magnetic bearing 3, the axial magnetic bearing 5, the first radial position sensor and the first radial magnetic bearing 3 being arranged in sequence between the first impeller 6 and the stator 2.
Example 5
This embodiment provides a magnetic levitation air compressor, which differs from embodiment 4 in that:
as shown in fig. 2, the first radial magnetic bearing 3 is fixed on the first radial magnetic bearing seat 15, the axial magnetic bearing 5 is fixed on the axial magnetic bearing seat 17, the axial magnetic bearing seat 17 can be fixed on the inner side of the first radial magnetic bearing seat 15, and the first radial magnetic bearing seat 15 is fixed on the inner side of the casing; the direction of flow of wind inside the motor may be referred to as the direction of the arrows in fig. 2.
As shown in fig. 3, a first heat dissipation channel is formed on the first radial magnetic bearing seat 15, the first heat dissipation channel comprises a first heat dissipation hole 26, a second heat dissipation hole 25 and a third heat dissipation hole 27 which are mutually communicated, the first heat dissipation hole 26 and the second heat dissipation hole 25 are parallel to the radial direction of the rotor 1, and the third heat dissipation hole 27 is perpendicular to the first heat dissipation hole 26 and the second heat dissipation hole 25; the first radiating holes 26 are formed between the first radial position sensor and the first radial magnetic bearing 3, and the second radiating holes 25 are formed between the first radial position sensor and the axial magnetic bearing 5;
the axial magnetic bearing seat 17 is provided with a fourth heat dissipation through hole; the fourth heat radiation through hole penetrates through the axial magnetic bearing seat 17;
in this application, the number of first heat dissipation channels formed on the first radial magnetic bearing seat 15 is the same as the number of magnetic poles in the first radial magnetic bearing 3.
Under the action of negative pressure suction force, wind is sucked in by the first air inlet 21, enters the third heat dissipation hole 27 under the flow guide of the baffle ring 12, and part of wind enters the first heat dissipation hole 26, passes through the gap between the first radial magnetic bearing 3 and the first radial displacement sensor 18, enters the first heat dissipation hole 26 arranged near the first air outlet 13, passes through the third heat dissipation hole 27, passes through the flow guide of the baffle ring 12, and finally enters the first air outlet 13;
the other part of wind enters the second heat dissipation holes 25, passes through the gap between the axial magnetic bearing 5 and the first radial displacement sensor 18 and the fourth heat dissipation through hole, then enters the fourth heat dissipation through hole and the second heat dissipation holes 25 which are arranged close to the first air outlet 13, passes through the third heat dissipation holes 27, passes through the flow guide of the baffle ring 12, and is sucked out from the first air outlet 13;
and the other part of wind is sucked in by the first air inlet 21, passes through the gap between the first radial magnetic bearing 3 and the stator 2 under the flow guide of the baffle ring 12, and is finally sucked out by the first air outlet 13.
Example 6
The present embodiment provides a magnetic levitation air compressor, which is different from embodiment 1 in that:
the second magnetic bearing component comprises a second radial magnetic bearing 4 and a second radial position sensor, which are in turn arranged between the second impeller 7 and the stator 2.
Example 7
This embodiment provides a magnetic levitation air compressor, which differs from embodiment 6 in that:
the second radial magnetic bearing 4 is fixed on a second radial magnetic bearing seat 16, and the second radial magnetic bearing seat 16 is connected with the shell and the second volute 9;
as shown in fig. 4 and 2, the flow direction of wind in the motor can refer to the direction of an arrow in fig. 2, a second heat dissipation channel is formed on the second radial magnetic bearing seat 16, the second heat dissipation channel comprises a fifth heat dissipation hole 28 and a sixth heat dissipation hole 29 which are mutually communicated, the fifth heat dissipation hole 28 is a through hole, and the sixth heat dissipation hole 29 is formed between the second radial magnetic bearing 4 and the second radial position sensor;
under the action of negative pressure suction force, wind is sucked in by the second air inlet 22, flows down through the baffle ring 12, enters the fifth heat dissipation hole 28, a part of wind enters the sixth heat dissipation hole 29, passes through the gap between the second radial magnetic bearing 4 and the second radial displacement sensor 19, enters the sixth heat dissipation hole 29 arranged near the second air outlet 14, passes through the fifth heat dissipation hole 28, flows through the baffle ring 12, and is sucked out by the second air outlet 14; after passing through the fifth heat dissipation holes 28, the other part of the wind passes through the side surface of the second radial displacement sensor 19, which is far away from the first radial magnetic bearing 3, enters the fifth heat dissipation holes 28, which are arranged close to the second air outlet 14, and is sucked out from the second air outlet 14 through the flow guide of the baffle ring 12;
after being sucked in by the second air inlet 22, the air is guided by the baffle ring 12 to pass through the gap between the second radial magnetic bearing 4 and the stator 2 and the gap between the rotor 1 and the stator 2, finally passes through the gap between the first radial magnetic bearing 3 and the stator 2, and finally is sucked out by the second air outlet 14.
Example 8
The present embodiment provides a magnetic levitation air compressor, which is different from embodiment 1 in that:
the first air outlet 13 and the first air inlet 21 are arranged between the first radial magnetic bearing 3 and the stator 2, and the second air outlet 14 are arranged between the second radial magnetic bearing 4 and the stator 2. The first air outlet 13 and the first air inlet 21 can be arranged on the circumference of the casing relatively, and the second air outlet 14 and the second air inlet 22 can be arranged on the circumference of the casing relatively, so that heat dissipation of the second magnetic bearing component and the first magnetic bearing component can be fully realized.
Example 9
This embodiment provides a magnetic levitation air compressor, which is different from embodiment 5 or embodiment 7 in that:
as shown in fig. 5 and 6, the cross section of the baffle ring 12 is L-shaped, and two fixing plates 24 are further disposed on the outer ring of the baffle ring 12 and used for being fixed in the first air outlet 13 or the second air outlet 14, and the inner ring of the baffle ring 12 is fixed on the first radial magnetic bearing seat 15 or the second radial magnetic bearing seat 16, so that a part of wind flows through the first heat dissipation channel or the second heat dissipation channel in the negative pressure environment of the air inlet pipeline.
While the foregoing description illustrates and describes the preferred embodiments of the present application, it is to be understood that this application is not limited to the forms disclosed herein, but is not to be construed as an exclusive use of other embodiments, and is capable of many other combinations, modifications and environments, and is capable of changes within the scope of the inventive subject matter, either as a result of the foregoing teachings or as a result of knowledge or technology in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the present invention are intended to be within the scope of the appended claims.
Claims (6)
1. The magnetic suspension air compressor is characterized by comprising a magnetic suspension motor, wherein the magnetic suspension motor comprises a rotor, a first magnetic bearing component, a stator and a second magnetic bearing component which are sequentially sleeved outside the rotor;
the two ends of the rotor are respectively connected with a first impeller and a second impeller, a first volute is arranged outside the first impeller, and a second volute is arranged outside the second impeller;
the air inlet end of the first volute is communicated with the air inlet pipeline, a first air outlet, a second air outlet, a first air inlet and a second air inlet are formed in the shell of the magnetic levitation motor, and the first air outlet and the second air outlet are communicated with the air inlet pipeline, so that a negative pressure environment is generated in the shell, and the magnetic levitation motor is cooled; baffle rings are arranged in the first air outlet and the second air outlet and used for drainage to realize cooling of the first magnetic bearing component and the second magnetic bearing component;
the first magnetic bearing component comprises an axial magnetic bearing, a first radial position sensor and a first radial magnetic bearing, and the axial magnetic bearing, the first radial position sensor and the first radial magnetic bearing are sequentially arranged between the first impeller and the stator;
the first radial magnetic bearing is fixed on the first radial magnetic bearing seat, the axial magnetic bearing is fixed on the axial magnetic bearing seat, and the axial magnetic bearing seat is fixed on the inner side of the first radial magnetic bearing seat;
the first radial magnetic bearing seat is provided with a first heat dissipation channel, the first heat dissipation channel comprises a first heat dissipation hole, a second heat dissipation hole and a third heat dissipation hole which are communicated with each other, the first heat dissipation hole and the second heat dissipation hole are parallel to the radial direction of the rotor, and the third heat dissipation hole is perpendicular to the first heat dissipation hole and the second heat dissipation hole; the first radiating hole is formed between the first radial position sensor and the first radial magnetic bearing, and the second radiating hole is formed between the first radial position sensor and the axial magnetic bearing;
the axial magnetic bearing seat is provided with a fourth heat dissipation through hole;
under the action of negative pressure suction force, wind is sucked from the first air inlet, flows into the third heat dissipation hole under the flow guide of the baffle ring, and part of wind enters the first heat dissipation hole, flows into the first heat dissipation hole close to the first air outlet through the gap between the first radial magnetic bearing and the first radial displacement sensor, flows into the third heat dissipation hole through the flow guide of the baffle ring, and finally enters the first air outlet; the other part of wind enters the second heat dissipation hole, passes through the gap between the axial magnetic bearing and the first radial displacement sensor and the fourth heat dissipation through hole, then enters the fourth heat dissipation through hole and the second heat dissipation hole which are arranged close to the first air outlet, passes through the third heat dissipation hole, passes through the flow guide of the baffle ring, and is sucked out from the first air outlet;
part of wind is sucked from the first air inlet, passes through the gap between the first radial magnetic bearing and the stator under the flow guide of the baffle ring, and is finally sucked from the first air outlet;
the second magnetic bearing component comprises a second radial magnetic bearing and a second radial position sensor, and the second radial magnetic bearing and the second radial position sensor are sequentially arranged between the second impeller and the stator.
2. A magnetic levitation air compressor according to claim 1, wherein a first connecting pipe is arranged between the first air outlet, the second air outlet and the air inlet pipe, and a first heat exchanger is arranged on the first connecting pipe.
3. A magnetic levitation air compressor according to claim 2, wherein the air inlet duct comprises a first air inlet duct, a gradual change duct and a second air inlet duct in communication with each other, the first air inlet duct having a smaller diameter than the second air inlet duct, the first connecting tube in communication with the second air inlet duct.
4. A magnetic levitation air compressor according to claim 1, wherein the second radial magnetic bearing is fixed on a second radial magnetic bearing seat, the second radial magnetic bearing seat being connected with the housing and the second volute;
the second radial magnetic bearing seat is provided with a second heat dissipation channel, the second heat dissipation channel comprises a fifth heat dissipation hole and a sixth heat dissipation hole which are communicated with each other, the fifth heat dissipation hole is a through hole, and the sixth heat dissipation hole is arranged between the second radial magnetic bearing and the second radial position sensor;
under the action of negative pressure suction force, wind is sucked in by the second air inlet, flows down through the baffle ring, enters the fifth heat dissipation hole, a part of wind enters the sixth heat dissipation hole, passes through the gap between the second radial magnetic bearing and the second radial displacement sensor, enters the sixth heat dissipation hole close to the second air outlet, passes through the fifth heat dissipation hole, flows through the baffle ring, and is finally sucked out by the second air outlet; after passing through the fifth heat dissipation hole, the other part of wind passes through the side surface of the second radial displacement sensor, which is far away from the first radial magnetic bearing, enters the fifth heat dissipation hole, which is arranged close to the second air outlet, and is guided by the baffle ring, and finally is sucked out by the second air outlet;
and after the air is sucked in from the second air inlet, the air passes through the gap between the second radial magnetic bearing and the stator and the gap between the rotor and the stator under the flow guide of the baffle ring, finally passes through the gap between the first radial magnetic bearing and the stator, and finally is sucked out from the second air outlet.
5. A magnetic levitation air compressor as defined in claim 1, wherein the first air outlet and the first air inlet are provided between the first radial magnetic bearing and the stator, and the second air inlet and the second air outlet are provided between the second radial magnetic bearing and the stator.
6. A magnetic levitation air compressor according to claim 1 or 4, wherein the cross section of the baffle ring is L-shaped, the outer ring of the baffle ring is further provided with two fixing plates for fixing in the first air outlet or the second air outlet, and the inner ring of the baffle ring is fixed on the first radial magnetic bearing seat or the second radial magnetic bearing seat, so that a part of wind flows through the first heat dissipation channel or the second heat dissipation channel in the negative pressure environment of the air inlet pipeline.
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| CN202310731804.8A CN116538110B (en) | 2023-06-20 | 2023-06-20 | Magnetic suspension air compressor |
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