CN117639384B - Self-cooling system and method of double-stage magnetic suspension turbine vacuum pump - Google Patents
Self-cooling system and method of double-stage magnetic suspension turbine vacuum pump Download PDFInfo
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- CN117639384B CN117639384B CN202410110558.9A CN202410110558A CN117639384B CN 117639384 B CN117639384 B CN 117639384B CN 202410110558 A CN202410110558 A CN 202410110558A CN 117639384 B CN117639384 B CN 117639384B
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- 238000001816 cooling Methods 0.000 title claims abstract description 171
- 239000000725 suspension Substances 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims description 5
- 238000005339 levitation Methods 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 11
- 239000007789 gas Substances 0.000 description 10
- 239000000112 cooling gas Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 238000009825 accumulation Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 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
- 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
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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
- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/10—Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention belongs to the technical field of cooling of magnetic suspension motors and discloses a self-cooling system and a self-cooling method of a two-stage magnetic suspension turbine vacuum pump.
Description
Technical Field
The invention belongs to the technical field of magnetic suspension motor cooling, and particularly relates to a self-cooling system and a self-cooling method of a two-stage magnetic suspension turbine vacuum pump.
Background
The gas cooling principle of the magnetic suspension turbine vacuum pump is that cooling gas is introduced into the pump body through a gas circulation system, so that the pump body is cooled.
The external cooling device introduces cooling gas into the pump body of the magnetic suspension turbine vacuum pump through a cooling channel; after the cooling gas enters the pump body, the cooling gas flows through a cooling channel arranged inside the pump body (the cooling channel is usually positioned in the outer wall or a specific structure inside the pump body); in the flowing process, the cooling gas contacts heat generated in the pump body and absorbs the heat; the cooling gas will continue to flow after absorbing heat, carrying heat out of the pump body.
At present, the gas circulation of the magnetic suspension turbine vacuum pump is usually carried out by using a circulating fan or a fan, and the equipment introduces cooling gas into the pump body for circulating flow by generating air flow so as to realize cooling; however, once the circulating fan fails, heat accumulation inside the pump body cannot be discharged in time, and the operation of the whole vacuum pump can be affected.
In order to solve the above technical problems, a self-cooling system has been developed in the market, for example, the patent application number is: CN202222557882.4 discloses a self-cooling system of a two-stage magnetic suspension turbine vacuum pump, which comprises a two-stage magnetic suspension motor, wherein the two-stage magnetic suspension motor comprises a motor housing, a primary air runner is arranged on one side of the motor housing of the vacuum pump, an inlet reducer is communicated with an air inlet of the primary air runner, a high-temperature cooling air channel is communicated with the lower part of the inlet reducer, the other end of the high-temperature cooling air channel is communicated with an inner cavity of the motor housing of the vacuum pump, and a cooling air inlet channel for introducing external cold air into the motor housing of the vacuum pump is arranged on the motor housing of the vacuum pump.
The existing self-cooling system can introduce cooling gas into the pump body, so that the temperature of the pump body is effectively reduced, and the normal operation of the pump body is ensured; meanwhile, the circulating flow of the cooling gas can also take away heat generated in the pump body, so that the equipment is prevented from being overheated due to heat accumulation; but this kind of current self-cooling system, it is internal with the cooling air introduction pump through the cooling air inlet that sets up on the motor housing, then gaseous high temperature cooling air chamber between motor stator front side and the motor housing gathers, and afterwards will high temperature wind introduce the import department of one-level air runner through high temperature cooling air passageway, consequently can not cool off between motor stator and the motor rotor, can not cool off the cavity that forms between motor stator rear side and the motor housing, and then the phenomenon is concentrated to the heat appears easily, reduces the result of use.
Disclosure of Invention
The invention aims to solve the main technical problems of providing a self-cooling system and a self-cooling method for a double-stage magnetic suspension turbine vacuum pump, which can realize the cooling stability of the double-stage magnetic suspension turbine vacuum pump, and can perform self-cooling on the double-stage magnetic suspension turbine vacuum pump without arranging a circulating fan, so that the occupied space of equipment is saved, the consumption of energy is reduced, the motor stator and the motor rotor can be cooled, and the cooling effect is improved.
In order to solve the technical problems, the invention provides the following technical scheme:
the utility model provides a self-cooling system of doublestage magnetic suspension turbine vacuum pump, including doublestage magnetic suspension motor, doublestage magnetic suspension motor includes motor housing, and one side of motor housing installs one-level air runner, and the second grade air runner is installed to motor housing's opposite side, communicates through the intercommunication pipeline between the air outlet of one-level air runner and the air intake of second grade air runner, and the position department intercommunication that is close to the second grade air runner on the communicating pipeline has from inhaling the hose, and the other end of inhaling the hose communicates with motor housing's inner chamber, has seted up the cooling air inlet channel that is used for introducing outside cold wind in the motor housing on the motor housing.
The following is a further optimization of the above technical solution according to the present invention:
The communication pipeline comprises a primary pipeline arranged on an air outlet of the primary air flow channel, an elbow bend pipe is communicated at an air inlet of the secondary air flow channel, and a secondary pipeline is communicated with the other end of the elbow bend pipe; one end of the primary pipeline and one end of the secondary pipeline, which are close to each other, are communicated with two ends of the ripple compensator.
Further optimizing: the cooling air inlet duct comprises an air exhaust groove which is sleeved on the motor shell and is positioned at the middle position, an inner annular groove is formed in the inner surface of the air exhaust groove, and an air inlet is formed in the air exhaust groove; a plurality of air inlets are formed in the motor shell at positions covered by the air exhaust grooves, and the outer ends of the air inlets are communicated with the air exhaust grooves.
Further optimizing: an exhaust port is formed in one side of the motor shell, which is positioned at the air inlet, the lower end of the self-priming hose is communicated with the exhaust port, and the other end of the self-priming hose is communicated with the secondary pipeline; a ball valve is arranged on the self-priming hose at a position close to the secondary pipeline.
Further optimizing: a motor stator, a motor rotor and a magnetic bearing are arranged in the motor shell; a high-temperature cooling air cavity is arranged in the motor shell and positioned on one side of the motor shell, which is close to the primary air flow channel, of the motor stator.
Further optimizing: and a cooling exhaust cavity is arranged in the motor shell and positioned at one side of the motor shell, which is close to the secondary air flow passage, of the motor stator.
Further optimizing: the motor rotor is arranged in the motor stator, the outer surface of the motor rotor and the inner surface of the motor stator are distributed at intervals, and a cooling channel is formed between the motor rotor and the inner surface of the motor stator.
Further optimizing: the motor is characterized in that a cooling shell is arranged in the motor shell, the middle of the cooling shell is used for installing a motor stator, a plurality of cooling air channels are formed in the outer side wall of the cooling shell, one ends of the cooling air channels are communicated with corresponding air inlets, and the other ends of the cooling air channels are communicated with a high-temperature cooling air cavity.
Further optimizing: the inner end of the exhaust port is communicated with the cooling exhaust cavity, and high-temperature gas in the cooling exhaust cavity enters the self-priming hose through the exhaust port.
The invention also provides a self-cooling method of the two-stage magnetic suspension turbine vacuum pump, which is based on the self-cooling system of the two-stage magnetic suspension turbine vacuum pump and comprises the following steps:
Step one: the double-stage magnetic suspension motor works to enable external air to be integrated into the first-stage air flow channel and improve the flow speed and the pressure, then the air is discharged from an air outlet of the first-stage air flow channel and is conveyed into the second-stage air flow channel through a communication pipeline, and at the moment, the air is discharged from the air outlet of the second-stage air flow channel after the flow speed and the pressure are improved again, so that double-stage supercharging is realized;
Step two: the external cooling air enters the exhaust groove through an air inlet on the exhaust groove and then sequentially enters the high-temperature cooling air cavity through an air inlet and a cooling air channel, and at the moment, the cooling air cools the inside of the double-stage magnetic levitation motor;
step three: cooling air in the high-temperature cooling air cavity flows through the cooling channel to enter the cooling exhaust cavity, and the cooling air is used for cooling the motor stator and the motor rotor at the moment;
Step four: the air cooled in the cooling exhaust cavity enters the self-priming hose through the exhaust port, the air enters the secondary pipeline through the diversion of the self-priming hose, and finally is discharged after passing through the secondary air flow passage, so that the self-cooling of the two-stage magnetic suspension turbine vacuum pump is completed.
By adopting the technical scheme, the self-priming pump is ingenious in design and reasonable in structure, the self-priming hose is arranged between the exhaust port and the secondary pipeline, the cooling channel in the two-stage magnetic suspension motor is communicated with the secondary pipeline through the self-priming hose, when the two-stage magnetic suspension turbine vacuum pump works, gas in the two-stage magnetic suspension motor is discharged through the secondary air channel after flowing from the self-priming hose to the secondary pipeline, and meanwhile, external gas enters the cooling channel in the two-stage magnetic suspension motor through the exhaust groove and the air inlet, and the self-cooling effect of the pump body is realized through the circulation; in addition, the method does not need to additionally arrange a circulating fan, so that the occupied space of equipment is saved, the structure of the equipment is simplified, and meanwhile, the energy consumption is reduced.
And through cooling channel's design, can make the cooling wind of high temperature cooling wind intracavity get into the cooling through cooling channel and exhaust the intracavity of airing exhaust, then rethread gas vent and self-priming hose exhaust cooling accomplish the air to when cooling wind flows through cooling channel, can cool off between motor stator and the motor rotor, improve the cooling effect, and then can avoid the heat phenomenon of concentrating, guarantee that doublestage magnetic suspension can normally work, improve the result of use.
The invention will be further described with reference to the drawings and examples.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a dual-stage magnetic levitation motor according to an embodiment of the present invention;
fig. 3 is a schematic view of a cooling air passage according to an embodiment of the present invention.
In the figure: 1-a first-stage air flow passage; 2-an exhaust groove; 3-primary pipeline; 4-exhaust port; 5-self priming hose; 6-ripple compensator; 7-ball valve; 8-a secondary air flow passage; 9-diode; 10-a motor housing; 11-bending the elbow; 12-air inlet; 13-a high-temperature cooling air cavity; 14-cooling air channels; 15-a motor stator; 16-cooling the shell; 17-a motor rotor; 18-a two-stage magnetic levitation motor; 19-cooling the exhaust cavity; 20-cooling channels.
Detailed Description
As shown in fig. 1-3: the utility model provides a self-cooling system of doublestage magnetic suspension turbine vacuum pump, includes doublestage magnetic suspension motor 18, doublestage magnetic suspension motor 18 includes motor housing 10, one side of motor housing 10 installs one-level air runner 1, and second grade air runner 8 is installed to motor housing 10's opposite side, communicates through the intercommunication pipeline between the air outlet of one-level air runner 1 and the air intake of second grade air runner 8, and the position department intercommunication that is close to second grade air runner 8 on the intercommunication pipeline has from inhaling hose 5, the other end and the inner chamber intercommunication of motor housing 10 of inhaling hose 5, offered the cooling air inlet channel that is used for introducing outside cold wind in the motor housing 10 on the motor housing 10.
In this embodiment, the two-stage magnetic levitation motor 18 is a prior art, and the specific structure includes a motor housing 10, and a motor stator 15, a motor rotor 17 and a magnetic bearing are installed in the motor housing 10.
A primary impeller is arranged in the primary air flow passage 1 and is in transmission connection with the corresponding end part of the motor rotor 17.
An air inlet is formed in one side, away from the two-stage magnetic levitation motor 18, of the primary air flow channel 1.
The secondary air flow passage 8 is internally provided with a secondary impeller which is in transmission connection with the corresponding end part of the motor rotor 17.
And an air outlet is arranged on the secondary air flow passage 8.
The two-stage magnetic suspension motor 18 works to drive the primary impeller and the secondary impeller to synchronously rotate through the motor rotor 17, at the moment, the primary impeller rotates to absorb external air and enter the primary air flow channel 1, and then the external air is discharged from an air outlet of the primary air flow channel 1 after the flow rate and the pressure of the external air are increased under the action of the primary impeller.
The high-pressure gas exhausted from the air outlet of the primary air flow channel 1 is conveyed into the secondary air flow channel 8 through a communication pipeline, and at the moment, the secondary impeller rotates to improve the flow speed and the pressure of the air again and then is exhausted through the air outlet of the secondary air flow channel 8, so that two-stage supercharging is realized, and the using effect is improved.
The communication pipeline comprises a primary pipeline 3, one end of the primary pipeline 3 is communicated with an air outlet of the primary air flow channel 1, an elbow pipe 11 is communicated with an air inlet of the secondary air flow channel 8, and the other end of the elbow pipe 11 is communicated with a secondary pipeline 9.
One end of the primary pipeline 3 and one end of the secondary pipeline 9, which are close to each other, are communicated with two ends of the ripple compensator 6, and the primary pipeline 3 is communicated with the secondary pipeline 9 through the ripple compensator 6.
In this way, the primary pressurized air discharged from the primary air flow channel 1 is delivered to the secondary air flow channel 8 through the primary pipeline 3, the ripple compensator 6, the secondary pipeline 9 and the elbow bend 11, and the air is pressurized again in the secondary air flow channel 8.
In this embodiment, the corrugated compensator 6 can automatically adjust the distance and position between two ends thereof, thereby facilitating the butt joint communication between the primary pipeline 3 and the secondary pipeline 9, and facilitating the use.
The cooling air inlet duct comprises an exhaust groove 2 which is sleeved on the motor shell 10 and is positioned at the middle position, an inner annular groove is formed in the inner surface of the exhaust groove 2, and the exhaust groove 2 is fixedly arranged on the motor shell 10.
The motor shell 10 is provided with a plurality of air inlets 12 at the position covered by the air exhaust groove 2, and the outer ends of the air inlets 12 are communicated with the air exhaust groove 2.
An air inlet is arranged on the air exhaust groove 2, external cooling air enters the air exhaust groove 2 through the air inlet, and then the cooling air sequentially enters each air inlet 12 through the guide of the air exhaust groove 2.
In this embodiment, the number of the air inlets 12 is plural, and the plurality of air inlets 12 are annularly and alternately arranged along the outer surface of the motor housing 10.
In this embodiment, only two air inlets 12 are used, and the remaining air inlets 12 are plugged by a plugging cap, so that the number of openings of the air inlets 12 can be selectively adjusted according to the cooling rate and the cooling effect.
In this embodiment, the axis of the air inlet 12 is perpendicular to the axis of the motor housing 10.
An exhaust port 4 is formed in the motor housing 10 at one side of the air inlet 12.
In this embodiment, the axis of the exhaust port 4 is perpendicular to the axis of the motor housing 10.
The lower end of the self-priming hose 5 is communicated with the exhaust port 4, and the other end of the self-priming hose 5 is communicated with the secondary pipeline 9.
A ball valve 7 is arranged on the self-priming hose 5 at a position close to the secondary pipeline 9, and the ball valve 7 is used for opening or closing the communication between the self-priming hose 5 and the secondary pipeline 9.
In this embodiment, the diameter of the inner surface of the self-priming hose 5 is smaller than that of the inner surface of the secondary pipe 9, and the flow rate in the secondary pipe 9 is larger than that in the self-priming hose 5, so that the venturi tube principle is adopted to suck the air in the self-priming hose 5 into the secondary pipe 9.
The motor housing 10 is internally provided with a high-temperature cooling air cavity 13 at one side of the motor housing 10 and the motor stator 15, which is close to the primary air flow passage 1.
And a cooling exhaust cavity 19 is arranged in the motor housing 10 and positioned on one side of the motor housing 10 and the motor stator 15, which is close to the secondary air flow passage 8.
The motor rotor 17 is installed inside the motor stator 15, the outer surface of the motor rotor 17 and the inner surface of the motor stator 15 are distributed at intervals, and a cooling channel 20 is formed between the two surfaces.
The two ends of the cooling channel 20 are respectively communicated with the corresponding high-temperature cooling air cavity 13 and the cooling exhaust cavity 19, and cooling air in the high-temperature cooling air cavity 13 flows into the cooling exhaust cavity 19 through the cooling channel 20.
The inside of the motor housing 10 is provided with a cooling shell 16, the outer surface of the cooling shell 16 is matched with the inner surface of the motor housing 10, and the middle part of the cooling shell 16 is used for installing a motor stator 15.
A plurality of cooling air channels 14 are formed in the outer side wall of the cooling shell 16, the plurality of cooling air channels 14 are annularly and sequentially distributed at intervals along the axis of the cooling shell 16, and the axis of the cooling air channels 14 and the axis of the motor shell 10 are distributed in parallel.
One end of the cooling air channel 14 is communicated with the corresponding air inlet 12, and the other end of the cooling air channel 14 is communicated with the high-temperature cooling air cavity 13.
Through the design, external cold air enters the cooling air channel 14 through the air inlet 12, and then is guided by the cooling air channel 14, so that the cold air enters the high-temperature cooling air cavity 13, and at the moment, the cold air enters the high-temperature cooling air cavity 13 and then cools the inside of the two-stage magnetic levitation motor 18.
The inner end of the exhaust port 4 is communicated with the cooling exhaust cavity 19, and high-temperature gas in the cooling exhaust cavity 19 enters the self-priming hose 5 through the exhaust port 4.
The invention also provides a self-cooling method of the two-stage magnetic suspension turbine vacuum pump, which is based on the self-cooling system of the two-stage magnetic suspension turbine vacuum pump, and comprises the following steps:
Step one: the two-stage magnetic suspension motor 18 works to drive the primary impeller and the secondary impeller to synchronously rotate, at the moment, the primary impeller rotates to absorb external air and enter the primary air flow channel 1 to increase the flow speed and the pressure, then the air is discharged from an air outlet of the primary air flow channel 1 and is conveyed into the secondary air flow channel 8 through a communication pipeline, at the moment, the secondary impeller rotates to increase the flow speed and the pressure again and then is discharged from an air outlet of the secondary air flow channel 8, and two-stage supercharging is realized.
In the first step, the air discharged from the air outlet of the primary air flow channel 1 enters the secondary air flow channel 8 through the primary pipeline 3, the ripple compensator 6, the secondary pipeline 9 and the elbow bend 11.
Step two: the external cooling air enters the exhaust groove 2 through the air inlet on the exhaust groove 2, then sequentially enters the cooling air channel 14 through the air inlet 12, and the cooling air enters the high-temperature cooling air cavity 13 through the diversion of the cooling air channel 14, and at the moment, the cooling air enters the high-temperature cooling air cavity 13 and then cools the inside of the two-stage magnetic levitation motor 18.
Step three: the cooling air in the high-temperature cooling air cavity 13 flows through a cooling channel 20 between the motor stator 15 and the motor rotor 17 and enters a cooling exhaust cavity 19, and at this time, the cooling air is used for cooling the motor stator 15 and the motor rotor 17.
Step four: the air cooled in the cooling exhaust cavity 19 enters the self-priming hose 5 through the exhaust port 4, the air enters the secondary pipeline 9 through the diversion of the self-priming hose 5, and finally is discharged after passing through the secondary air flow passage 8, so that the self-cooling of the two-stage magnetic suspension turbine vacuum pump is completed.
By adopting the technical scheme, the self-cooling system of the two-stage magnetic suspension turbine vacuum pump does not need an external fan, and the cooling requirement of the two-stage magnetic suspension turbine vacuum pump can be ensured by only arranging the self-suction hose 5 between the two-stage magnetic suspension motor 18 and the secondary pipeline 9.
The self-priming hose 5 is arranged between the two-stage magnetic suspension motor 18 and the two-stage pipeline 9, so that the whole space of the two-stage magnetic suspension turbine vacuum pump is not occupied, the whole volume of the two-stage magnetic suspension turbine vacuum pump is further reduced, and the space utilization rate is improved.
And through the design of cooling channel 20, can make the cooling wind in the high temperature cooling wind chamber 13 get into the cooling through cooling channel 20 and exhaust the intracavity of airing exhaust 19, then rethread gas vent 4 and self-priming hose 5 exhaust cooling accomplish the air to when cooling wind flows through cooling channel 20, can cool off between motor stator 15 and the motor rotor 17, improve the cooling effect, and then can avoid the heat phenomenon of concentrating, guarantee that doublestage magnetic levitation motor 18 can normally work, improve the result of use.
Alterations, modifications, substitutions and variations of the embodiments herein will be apparent to those of ordinary skill in the art in light of the teachings of the present invention without departing from the spirit and principles of the invention.
Claims (5)
1. The utility model provides a self-cooling system of doublestage magnetic suspension turbine vacuum pump, includes doublestage magnetic suspension motor (18), doublestage magnetic suspension motor (18) include motor housing (10), and one-level air runner (1) are installed to one side of motor housing (10), and second grade air runner (8) are installed to the opposite side of motor housing (10), its characterized in that: the air outlet of the primary air flow passage (1) is communicated with the air inlet of the secondary air flow passage (8) through a communication pipeline, a self-priming hose (5) is communicated at a position, close to the secondary air flow passage (8), on the communication pipeline, the other end of the self-priming hose (5) is communicated with the inner cavity of the motor shell (10), and a cooling air inlet channel for introducing external cold air into the motor shell (10) is formed in the motor shell (10);
The communication pipeline comprises a primary pipeline (3) arranged on an air outlet of the primary air flow channel (1), an elbow bend (11) is communicated at an air inlet of the secondary air flow channel (8), and a secondary pipeline (9) is communicated with the other end of the elbow bend (11); one end of the primary pipeline (3) and one end of the secondary pipeline (9) which are close to each other are communicated with two ends of the ripple compensator (6);
the cooling air inlet duct comprises an air exhaust groove (2) sleeved on the motor shell (10) and positioned at the middle position, an inner annular groove is formed in the inner surface of the air exhaust groove (2), and an air inlet is formed in the air exhaust groove (2); a plurality of air inlets (12) are formed in the motor shell (10) at positions covered by the air exhaust grooves (2), and the outer ends of the air inlets (12) are communicated with the air exhaust grooves (2);
An exhaust port (4) is formed in one side, located at the air inlet (12), of the motor shell (10), the lower end of the self-priming hose (5) is communicated with the exhaust port (4), and the other end of the self-priming hose (5) is communicated with the secondary pipeline (9); a ball valve (7) is arranged at the position, close to the secondary pipeline (9), of the self-priming hose (5);
A high-temperature cooling air cavity (13) is arranged at one side, close to the primary air flow channel (1), in the motor shell (10);
A cooling exhaust cavity (19) is arranged at one side of the motor shell (10) close to the secondary air flow channel (8);
A cooling shell (16) is arranged in the motor shell (10), a plurality of cooling air channels (14) are formed in the outer side wall of the cooling shell (16), one end of each cooling air channel (14) is communicated with a corresponding air inlet (12), and the other ends of the cooling air channels (14) are communicated with a high-temperature cooling air cavity (13);
The inner end of the exhaust port (4) is communicated with the cooling exhaust cavity (19), and high-temperature gas in the cooling exhaust cavity (19) enters the self-priming hose (5) through the exhaust port (4).
2. The self-cooling system of a two-stage magnetic levitation turbine vacuum pump of claim 1, wherein: a motor stator (15), a motor rotor (17) and a magnetic bearing are arranged in the motor shell (10).
3. The self-cooling system of a two-stage magnetic levitation turbine vacuum pump of claim 2, wherein: the motor rotor (17) is arranged in the motor stator (15), the outer surface of the motor rotor (17) and the inner surface of the motor stator (15) are distributed at intervals, and a cooling channel (20) is formed between the outer surface of the motor rotor and the inner surface of the motor stator (15).
4. A self-cooling system for a dual-stage magnetic levitation turbine vacuum pump as defined in claim 3, wherein: the middle part of the cooling shell (16) is used for installing the motor stator (15).
5. A self-cooling method of a two-stage magnetic levitation turbine vacuum pump, based on the self-cooling system of the two-stage magnetic levitation turbine vacuum pump of claim 4, characterized in that: the method comprises the following steps:
Step one: the double-stage magnetic levitation motor (18) works to enable external air to be integrated into the first-stage air flow channel (1) and improve the flow speed and the pressure, then the air is discharged from an air outlet of the first-stage air flow channel (1) and is conveyed into the second-stage air flow channel (8) through a communication pipeline, and at the moment, the air is discharged from the air outlet of the second-stage air flow channel (8) after the flow speed and the pressure are improved again, so that double-stage supercharging is realized;
Step two: the external cooling air enters the exhaust groove (2) through an air inlet on the exhaust groove (2), then sequentially enters the high-temperature cooling air cavity (13) through the air inlet (12) and the cooling air channel (14), and at the moment, the cooling air cools the inside of the double-stage magnetic levitation motor (18);
Step three: cooling air in the high-temperature cooling air cavity (13) flows through the cooling channel (20) and enters the cooling exhaust cavity (19), and the cooling air is used for cooling the motor stator (15) and the motor rotor (17);
Step four: air cooled in the cooling exhaust cavity (19) enters the self-priming hose (5) through the exhaust port (4), the air enters the secondary pipeline (9) through the diversion of the self-priming hose (5), and finally is discharged after passing through the secondary air flow channel (8), so that the self-cooling of the two-stage magnetic suspension turbine vacuum pump is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410110558.9A CN117639384B (en) | 2024-01-26 | 2024-01-26 | Self-cooling system and method of double-stage magnetic suspension turbine vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410110558.9A CN117639384B (en) | 2024-01-26 | 2024-01-26 | Self-cooling system and method of double-stage magnetic suspension turbine vacuum pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117639384A CN117639384A (en) | 2024-03-01 |
| CN117639384B true CN117639384B (en) | 2024-05-24 |
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| CN202410110558.9A Active CN117639384B (en) | 2024-01-26 | 2024-01-26 | Self-cooling system and method of double-stage magnetic suspension turbine vacuum pump |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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