CN218598463U - Self-cooling system of two-stage magnetic suspension turbine vacuum pump - Google Patents
Self-cooling system of two-stage magnetic suspension turbine vacuum pump Download PDFInfo
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- CN218598463U CN218598463U CN202222557882.4U CN202222557882U CN218598463U CN 218598463 U CN218598463 U CN 218598463U CN 202222557882 U CN202222557882 U CN 202222557882U CN 218598463 U CN218598463 U CN 218598463U
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Abstract
The utility model discloses a self-cooling system of doublestage magnetic suspension turbo vacuum pump, including doublestage magnetic suspension motor, doublestage magnetic suspension motor includes the motor housing, one side of vacuum pump motor housing is installed one-level air runner, the air inlet department intercommunication of one-level air runner has the import reducing pipe, the below intercommunication of import reducing pipe has the high temperature cooling air passageway, the other end of high temperature cooling air passageway communicates with the inner chamber of vacuum pump motor housing, set up on the vacuum pump motor housing and be used for introducing outside cold wind into the cooling air inlet duct in the vacuum pump motor housing, the utility model discloses need not to use external fan, only need arrange the high temperature magnetic suspension cooling air passageway between doublestage magnetic suspension motor and the import reducing pipe, can guarantee the cooling requirement of doublestage turbo vacuum pump; the whole volume is reduced, the space utilization rate is improved, the pipeline design is simple, and the operation and the installation are easy; the cost of the cooling system is reduced, the installation difficulty of the pipeline system is reduced, and the installation efficiency is improved.
Description
Technical Field
The utility model belongs to the technical field of the magnetic suspension vacuum pump cooling, specific theory relates to a doublestage magnetic suspension turbine vacuum pump's self-cooling system.
Background
The magnetic suspension turbine vacuum pump is an intelligent turbine device researched and developed by a magnetic suspension bearing technology, a high-speed permanent magnet motor technology, a high-frequency vector frequency conversion technology and a high-efficiency fluid mechanical technology, and is widely applied to energy-saving transformation of a vacuum pump dehydration process in the paper industry.
The conventional magnetic suspension turbine vacuum pump is mainly a single-stage magnetic suspension vacuum pump and cannot meet the requirement of using high vacuum degree, so that the invention of the two-stage magnetic suspension turbine vacuum pump is inevitable; the two-stage magnetic suspension turbine vacuum pump is high in vacuum degree and better in effect.
However, when the two-stage magnetic suspension turbine vacuum pump works, the temperature rise speed inside the motor is high, the temperature inside the motor is too high, the service life of the motor is influenced, and in order to solve the problem of the too high temperature inside the motor, the air cooling mode is adopted to cool the motor of the magnetic suspension vacuum pump in the prior art.
In the prior art, the air-cooled two-stage magnetic suspension turbine vacuum pump mostly uses an external fan for air blowing cooling, so that when the overall structure of the two-stage magnetic suspension turbine vacuum pump is required to be arranged and designed, the spatial position of the external fan needs to be reserved, and a connecting pipeline between the external fan and the turbine vacuum pump is designed; therefore, the overall size of the two-stage magnetic suspension turbine vacuum pump system is increased, the occupied space is large, and the pipeline system is complex; this will cause the cost increase of the double-stage magnetic suspension turbine vacuum pump system, the installation difficulty of the pipeline system is increased, and the installation efficiency is low.
In addition, the existing air-cooled and cooled two-stage magnetic suspension turbine vacuum pump has the advantages that a plurality of external fans are selected and used according to the use working conditions of the vacuum pump, and meanwhile, in order to meet the use requirements of the vacuum pump under different working conditions, the air quantity, the pressure and the like of the external fans are required to be adjustable, so that the whole control system is complicated, the external fans are complex in structure and multiple in parts, and the failure mode of the whole vacuum pump system is increased.
The adjustment of the air quantity and the pressure of the external fan is represented by a control signal given by a control system and the change of the rotating speed, the whole process has certain hysteresis, the motor damage probability caused by untimely cooling when the motor is overheated is increased, and the service life of the motor is reduced.
SUMMERY OF THE UTILITY MODEL
The main technical problem to be solved by the utility model is to provide a self-cooling system of a two-stage magnetic suspension turbine vacuum pump, which can solve the problems of large overall volume, large occupied space, complex pipeline system and increased cost of the two-stage magnetic suspension turbine vacuum pump system caused by using an external fan on the basis of meeting the cooling requirement of the two-stage magnetic suspension turbine vacuum pump; meanwhile, the problems that the overall control system is complex due to the use of an external fan, the failure modes of the whole vacuum pump system are increased, and the service life of a motor is shortened are solved.
In order to solve the technical problem, the utility model provides a following technical scheme:
the utility model provides a self-cooling system of doublestage magnetic suspension turbo vacuum pump, includes doublestage magnetic suspension motor, doublestage magnetic suspension motor includes motor housing, one-level air runner is installed to one side of vacuum pump motor housing, the inlet port department intercommunication of one-level air runner has the import reducing pipe, the below intercommunication of import reducing pipe has high temperature cooling air passageway, the other end and the inner chamber intercommunication of vacuum pump motor housing of high temperature cooling air passageway, offer on the vacuum pump motor housing and be used for introducing the interior cooling air intake duct of vacuum pump motor housing with outside cold wind.
The following is the utility model discloses to above-mentioned technical scheme's further optimization:
a stator shell is arranged in the motor shell, and a motor stator is arranged in the middle of the stator shell; a high-temperature cooling air cavity is arranged between the motor shell and the motor stator in the motor shell.
Further optimization: the cooling air inlet duct comprises a plurality of cooling air inlets, the plurality of cooling air inlets are arranged on the outer surface of the motor shell and far away from the position of the primary air flow channel, and the plurality of cooling air inlets are sequentially arranged at intervals along the outer surface of the motor shell.
Further optimization: a plurality of cooling air channels are arranged in the outer side wall of the stator shell, the cooling air channels are arranged in an annular mode along the axis of the stator shell at intervals in sequence, and the axis of each cooling air channel and the axis of the motor shell are arranged in parallel.
Further optimization: one end of each cooling air channel is communicated with the corresponding cooling air inlet, and the other end of each cooling air channel is communicated with the high-temperature cooling air cavity.
And (4) further optimizing: the diameter of the inner hole of the cooling air inlet is larger than that of the inner hole of the cooling air channel.
Further optimization: the high-temperature cooling air channel comprises a first connecting pipeline which is fixedly arranged on the motor shell and communicated with the high-temperature cooling air cavity.
Further optimization: the other end of the first connecting pipeline is communicated with a second connecting pipeline, the other end of the second connecting pipeline is communicated with a connecting hose, and the other end of the connecting hose is communicated with a third connecting pipeline.
Further optimization: a high-temperature air inlet is formed in the position, close to the third connecting pipeline, on the outer surface of the inlet reducer pipe and communicated with the inner cavity of the inlet reducer pipe; one end of the third connecting pipeline, which is far away from the connecting hose, is communicated with the high-temperature air inlet.
Further optimization: and the second connecting pipeline is connected with an automatic control valve in series, and the opening of the automatic control valve is adjusted to adjust the output air volume in the second connecting pipeline.
The utility model adopts the above technical scheme, the conception is ingenious, the structure is reasonable, the design and the use of the self-cooling system of the two-stage magnetic suspension turbine vacuum pump can ensure the cooling requirement of the two-stage magnetic suspension turbine vacuum pump only by arranging the high-temperature cooling air channel between the two-stage magnetic suspension motor and the inlet reducer pipe without using an external fan; the design and the use reduce the whole volume of the two-stage magnetic suspension turbine vacuum pump, occupy small space, improve the space utilization rate, and simultaneously, the pipeline design is simple and easy to operate and install; the design and the use reduce the cost of the cooling system, reduce the installation difficulty of the pipeline system and improve the installation efficiency.
The high-temperature cooling air channel is connected with an automatic control valve in series, the adjustability and the controllability can be realized through the automatic control valve, the opening of the pipeline can be controlled through the automatic control valve according to the temperature change of the double-stage magnetic suspension motor in actual use, and the purpose of real-time adjustment is achieved, so that the motor damage probability caused by overheating and untimely cooling of the double-stage magnetic suspension motor is greatly reduced, and the service life of the motor is prolonged.
The present invention will be further explained 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 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 2;
fig. 4 is a partially enlarged view of C in fig. 3.
In the figure: 1-a steam-water separator; 2-an inlet reducer pipe; 3-a primary air flow channel; 4-a motor housing; 5-a first connecting line; 6-a second connecting line; 7-automatic control valve; 8-connecting a hose; 9-a third connecting pipeline, 10-a motor stator; 11-cooling air inlet; 12-a first-stage impeller; 13-a two-stage magnetic suspension motor; 14-a stator housing; 15-secondary air flow channel; 16-a two-stage impeller; 22-cooling air channel; 33-high temperature cooling air cavity; 44-high temperature cooling air channel; 55-high temperature air inlet; 66-primary air outlet area.
Detailed Description
As shown in fig. 1-4, a self-cooling system of a two-stage magnetic suspension turbine vacuum pump includes a two-stage magnetic suspension motor 13, the two-stage magnetic suspension motor 13 includes a motor housing 4, a first air flow channel 3 is installed on one side of the motor housing 4 of the vacuum pump, an air inlet of the first air flow channel 3 is communicated with an inlet reducer pipe 2, a high-temperature cooling air channel 44 is communicated with a lower portion of the inlet reducer pipe 2, the other end of the high-temperature cooling air channel 44 is communicated with an inner cavity of the motor housing 4 of the vacuum pump, and a cooling air inlet channel for introducing external cold air into the motor housing 4 of the vacuum pump is provided on the motor housing 4 of the vacuum pump.
In the present embodiment, the two-stage magnetic levitation motor 13 is a conventional motor, and includes a motor housing 4, and a motor stator 10, a motor rotor, and a magnetic bearing are installed in the motor housing 4.
A primary impeller 12 is installed in the primary air flow channel 3, and the primary impeller 12 is in transmission connection with the end part of the motor rotor.
A primary air outlet area 66 is arranged in the primary air flow channel 3.
When the two-stage magnetic suspension motor 13 works, the first-stage impeller 12 is driven to rotate, the first-stage impeller 12 generates suction, air enters the first-stage air outlet area 66 through the steam-water separator 1 and the inlet reducer 2 at the moment, and then the air is discharged from the air outlet of the first-stage air flow channel 3 after the flow speed and the pressure of the air are increased by the first-stage impeller 12.
The steam-water separator 1 is used for separating moisture in air flowing through so as to reduce the moisture content of the air entering the primary air outlet area 66.
A high-temperature cooling air cavity 33 is arranged between the motor shell 4 and the motor stator 10 in the motor shell 4; the heat generated in the motor case 4 is concentrated in the high temperature cooling air chamber 33.
The cooling air inlet duct comprises a plurality of cooling air inlets 11, the cooling air inlets 11 are arranged on the outer surface of the motor shell 4 and far away from the position of the primary air flow channel 3, and the cooling air inlets 11 are sequentially arranged at intervals along the outer surface of the motor shell 4.
The axis of the cooling air inlet 11 is perpendicular to the axis of the motor shell 4.
The motor comprises a motor shell 4, a stator shell 14 is arranged inside the motor shell 4, the outer surface of the stator shell 14 is matched with the inner surface of the motor shell 4, and the middle of the stator shell 14 is used for installing a motor stator 10.
A plurality of cooling air channels 22 are formed in the outer side wall of the stator shell 14, the plurality of cooling air channels 22 are annularly arranged along the axis of the stator shell 14 and are sequentially arranged at intervals, and the axis of the cooling air channel 22 is arranged in parallel with the axis of the motor shell 4.
One end of each cooling air channel 22 is communicated with the corresponding cooling air inlet 11, and the other end of each cooling air channel 22 is communicated with the high-temperature cooling air cavity 33.
By the design, external cold air enters the cooling air channel 22 through the cooling air inlet 11, then is guided by the cooling air channel 22, and enters the high-temperature cooling air cavity 33, and then cools the inside of the two-stage magnetic suspension motor 13 after entering the high-temperature cooling air cavity 33.
In this embodiment, the number of the cooling air inlets 11 is twelve, twelve cooling air inlets 11 are formed in the outer surface of the motor housing 4, and the twelve cooling air inlets 11 are sequentially and alternately arranged in a ring shape along the outer surface of the motor housing 4.
In this embodiment, the number of the cooling air channels 22 is forty-six, the forty-six cooling air channels 22 are opened in the outer side wall of the stator casing 14, are annular along the axis of the stator casing 14, and are sequentially arranged at intervals, one ends of the forty-six cooling air channels 22 are communicated with the corresponding cooling air inlets 11, and the other ends of the forty-six cooling air channels 22 are communicated with the high-temperature cooling air cavity 33.
In this embodiment, the inner diameter of the cooling air inlet 11 is larger than that of the cooling air channel 22, so that one end of the cooling air channel 22 can communicate with the corresponding cooling air inlet 11.
In addition to this embodiment, the stator housing 14 may also be integrally connected to the motor housing 4, that is, the stator housing 14 is integrally formed on the motor housing 4, and at this time, the stator housing 14 is a part of the motor housing 4, that is, the cooling air channel 22 may also be opened in an outer side wall of the stator housing 14.
The high-temperature cooling air channel 44 comprises a first connecting pipeline 5, the first connecting pipeline 5 is fixedly installed on the motor shell 4, and the first connecting pipeline 5 is communicated with the high-temperature cooling air cavity 33.
The other end of the first connecting pipeline 5 is communicated with a second connecting pipeline 6, the other end of the second connecting pipeline 6 is communicated with a connecting hose 8, and the other end of the connecting hose 8 is communicated with a third connecting pipeline 9.
The axis of the first connecting pipeline 5 is perpendicular to the axis of the motor shell 4, and the axis of the second connecting pipeline 6 is perpendicular to the axis of the first connecting pipeline 5.
The axis of the third connecting pipeline 9 is perpendicular to the axis of the second connecting pipeline 6.
Connecting tube 8 sets up between third connecting line 9 and second connecting line 6, can adjust and the interval between third connecting line 9 and the second connecting line 6 of self-adaptation through connecting tube 8, facilitates the use.
And a high-temperature air inlet 55 is formed in the position, close to the third connecting pipeline 9, on the outer surface of the inlet reducer 2, and the high-temperature air inlet 55 is communicated with the inner cavity of the inlet reducer 2.
One end of the third connecting pipeline 9 far away from the connecting hose 8 is communicated with a high-temperature air inlet 55.
By means of the design, the high-temperature air in the high-temperature cooling air cavity 33 can be guided into the inlet reducer pipe 2 through the first connecting pipeline 5, the second connecting pipeline 6, the connecting hose 8, the third connecting pipeline 9 and the high-temperature air inlet 55.
By the design, after the vacuum pump is normally started, the first-stage impeller 12 rotates, gas passing through the steam-water separator 1 is in a negative pressure state, the pressure in the high-temperature cooling air cavity 33 is in a positive pressure state, and at the moment, due to the existence of the pressure difference, a self-cooling system of the whole two-stage magnetic suspension turbine vacuum pump can be formed.
The cooling air is sucked from the cooling air inlet 11, passes through the cooling air channel 22, and is collected in the high-temperature cooling air cavity 33, and at the moment, the cooling air cools the inside of the two-stage magnetic levitation motor 13.
Then, the high-temperature air in the high-temperature cooling air cavity 33 is guided into the inlet reducer pipe 2 through the first connecting pipeline 5, the second connecting pipeline 6, the connecting hose 8, the third connecting pipeline 9 and the high-temperature air inlet 55.
Then, under the work of the first-stage impeller 12, the high-temperature air is sucked into the first-stage air outlet area 66, a cooling cycle of the two-stage magnetic suspension turbine vacuum pump is completed at the moment, and the self-cooling mode continuously works along with the normal work of the vacuum pump, so that the function of cooling the motor is achieved.
The design and the use of the self-cooling system of the two-stage magnetic suspension turbine vacuum pump can ensure the cooling requirement of the two-stage magnetic suspension turbine vacuum pump only by arranging the high-temperature cooling air channel 44 between the two-stage magnetic suspension motor 13 and the inlet reducer pipe 2 without using an external fan.
The high-temperature cooling air channel 44 is arranged at the middle shaft of the motor, and does not occupy the whole space of the two-stage magnetic suspension turbine vacuum pump, namely, compared with the scheme of an external fan, the high-temperature cooling air channel reduces the whole volume of the two-stage magnetic suspension turbine vacuum pump and improves the space utilization rate.
The high-temperature cooling air channel 44 is simple in design and easy to operate and install; the design and the use reduce the cost of the system, reduce the installation difficulty of a pipeline system and improve the installation efficiency.
An automatic control valve 7 is connected in series on the second connecting pipeline 6, and the opening of the automatic control valve 7 is adjusted, so that the output air volume in the second connecting pipeline 6 is adjusted.
By the design, the automatic control valve 7 is connected in series on the second connecting pipeline 6 of the high-temperature cooling air channel 44, the automatic control valve 7 can realize adjustability and controllability, and the automatic control valve 7 can control the opening of the pipeline according to the temperature change of the double-stage magnetic suspension motor 13 in actual use, so that the purpose of real-time adjustment is achieved, the motor damage probability caused by overheating and untimely cooling of the double-stage magnetic suspension motor 13 is greatly reduced, and the service life of the motor is prolonged.
A secondary air flow passage 15 is arranged on the other side of the two-stage magnetic suspension motor 13, a secondary impeller 16 is arranged in the secondary air flow passage 15, and the secondary impeller 16 is in transmission connection with the end part of the motor rotor.
A series pipeline 17 is arranged between the secondary air flow passage 15 and the primary air flow passage 3.
One end of the serial pipeline 17 close to the primary air flow channel 3 is communicated with an air outlet of the primary air flow channel 3.
One end of the serial pipeline 17 close to the secondary air flow passage 15 is communicated with an air inlet of the secondary air flow passage 15.
With the design, the air in the primary air outlet area 66 of the primary air flow channel 3 enters the secondary air flow channel 15 through the series pipeline 17, and is discharged from the air outlet of the secondary air flow channel 15 after the pressure is increased by the rotation of the secondary impeller 16.
For those skilled in the art, based on the teachings of the present invention, changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.
Claims (10)
1. The utility model provides a self-cooling system of doublestage magnetic suspension turbine vacuum pump, includes doublestage magnetic suspension motor (13), and doublestage magnetic suspension motor (13) include motor housing (4), and one-level air runner (3), its characterized in that are installed to one side of vacuum pump motor housing (4): an air inlet of the primary air flow channel (3) is communicated with an inlet reducer pipe (2), a high-temperature cooling air channel (44) is communicated with the lower portion of the inlet reducer pipe (2), the other end of the high-temperature cooling air channel (44) is communicated with an inner cavity of a vacuum pump motor shell (4), and a cooling air inlet channel used for introducing external cold air into the vacuum pump motor shell (4) is formed in the vacuum pump motor shell (4).
2. The self-cooling system of the two-stage magnetic suspension turbine vacuum pump as claimed in claim 1, wherein: a stator shell (14) is arranged in the motor shell (4), and the middle part of the stator shell (14) is used for mounting a motor stator (10); a high-temperature cooling air cavity (33) is arranged between the motor shell (4) and the motor stator (10) in the motor shell (4).
3. The self-cooling system of the two-stage magnetic suspension turbine vacuum pump as claimed in claim 2, wherein: the cooling air inlet duct comprises a plurality of cooling air inlets (11), the plurality of cooling air inlets (11) are arranged on the outer surface of the motor shell (4) and far away from the position of the primary air flow channel (3), and the plurality of cooling air inlets (11) are sequentially arranged at intervals along the outer surface of the motor shell (4).
4. The self-cooling system of the two-stage magnetic suspension turbine vacuum pump as claimed in claim 3, wherein: a plurality of cooling air channels (22) are arranged in the outer side wall of the stator shell (14), the plurality of cooling air channels (22) are arranged in an annular mode along the axis of the stator shell (14) at intervals in sequence, and the axis of each cooling air channel (22) is arranged in parallel with the axis of the motor shell (4).
5. The self-cooling system of the two-stage magnetic suspension turbine vacuum pump as claimed in claim 4, wherein: one end of each cooling air channel (22) is communicated with the corresponding cooling air inlet (11), and the other end of each cooling air channel (22) is communicated with the high-temperature cooling air cavity (33).
6. The self-cooling system of the two-stage magnetic suspension turbine vacuum pump as claimed in claim 5, wherein: the diameter of the inner hole of the cooling air inlet (11) is larger than that of the inner hole of the cooling air channel (22).
7. The self-cooling system of the two-stage magnetic suspension turbine vacuum pump as claimed in claim 6, wherein: the high-temperature cooling air channel (44) comprises a first connecting pipeline (5), the first connecting pipeline (5) is fixedly mounted on the motor shell (4), and the first connecting pipeline (5) is communicated with the high-temperature cooling air cavity (33).
8. The self-cooling system of the two-stage magnetic suspension turbine vacuum pump as claimed in claim 7, wherein: the other end of the first connecting pipeline (5) is communicated with a second connecting pipeline (6), the other end of the second connecting pipeline (6) is communicated with a connecting hose (8), and the other end of the connecting hose (8) is communicated with a third connecting pipeline (9).
9. The self-cooling system of the two-stage magnetic suspension turbine vacuum pump as claimed in claim 8, wherein: a high-temperature air inlet (55) is formed in the position, close to the third connecting pipeline (9), on the outer surface of the inlet reducer pipe (2), and the high-temperature air inlet (55) is communicated with the inner cavity of the inlet reducer pipe (2); one end of the third connecting pipeline (9) far away from the connecting hose (8) is communicated with the high-temperature air inlet (55).
10. The self-cooling system of the two-stage magnetic suspension turbine vacuum pump as claimed in claim 9, wherein: and the second connecting pipeline (6) is connected with an automatic control valve (7) in series, and the opening of the automatic control valve (7) is adjusted to adjust the output air volume in the second connecting pipeline (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222557882.4U CN218598463U (en) | 2022-09-27 | 2022-09-27 | Self-cooling system of two-stage magnetic suspension turbine vacuum pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222557882.4U CN218598463U (en) | 2022-09-27 | 2022-09-27 | Self-cooling system of two-stage magnetic suspension turbine vacuum pump |
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| CN218598463U true CN218598463U (en) | 2023-03-10 |
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| CN202222557882.4U Active CN218598463U (en) | 2022-09-27 | 2022-09-27 | Self-cooling system of two-stage magnetic suspension turbine vacuum pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117639384A (en) * | 2024-01-26 | 2024-03-01 | 山东天瑞重工有限公司 | Self-cooling system and method of double-stage magnetic suspension turbine vacuum pump |
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2022
- 2022-09-27 CN CN202222557882.4U patent/CN218598463U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117639384A (en) * | 2024-01-26 | 2024-03-01 | 山东天瑞重工有限公司 | Self-cooling system and method of double-stage magnetic suspension turbine vacuum pump |
| CN117639384B (en) * | 2024-01-26 | 2024-05-24 | 山东天瑞重工有限公司 | Self-cooling system and method of double-stage magnetic suspension turbine vacuum pump |
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