CN112953106A - Electric spindle for air-conditioning compressor in space environment - Google Patents
Electric spindle for air-conditioning compressor in space environment Download PDFInfo
- Publication number
- CN112953106A CN112953106A CN202110439905.9A CN202110439905A CN112953106A CN 112953106 A CN112953106 A CN 112953106A CN 202110439905 A CN202110439905 A CN 202110439905A CN 112953106 A CN112953106 A CN 112953106A
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- Prior art keywords
- main shaft
- periphery
- spindle
- rotor
- casing
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- 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
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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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The utility model provides an electricity main shaft for air condition compressor under space environment, belong to outer space field, the main shaft periphery is provided with the rotor, the stator sets up the interior week at the casing, be provided with a plurality of air supporting bearings between main shaft periphery and the casing interior week, air supporting bearing includes axial air supporting bearing and radial air supporting bearing, be provided with cooling system in the casing, the casing periphery is provided with the entry and the export of floating gas and coolant liquid, gas and coolant liquid communicate with air supporting bearing and cooling cavity through gas passage and coolant liquid passageway respectively, with gaseous contact between main shaft and the periphery, utilize the space to keep apart between main shaft rear end and the rear end cap, the reducible or the wearing and tearing of elimination motor of this electricity main shaft, prevent to generate heat and damage the motor winding, reduce the friction damage part, the life of extension equipment.
Description
Technical Field
The invention relates to an electric spindle, in particular to an electric spindle for an air conditioner compressor in a space environment, and belongs to the field of outer space.
Background
Spacecraft, space stations, planet base stations and the like in space have the characteristics of extremely low or high temperature, no air circulation, high heat dissipation difficulty, and mainly radiation in a heat transfer mode, for example, the surface of the spacecraft, which is directly irradiated by sunlight, can generate the temperature of over 100 ℃, and the surface of the spacecraft, which is shaded, can be as low as-100 ℃ to-200 ℃; in addition, the pressure of the spacecraft is generally 10-6pa due to the microgravity state, the gravity is reduced due to the fact that the pressure is far away from the earth, and the gravity acceleration is also in a range of less than 1% g.
The space station and the planet base station have similar regional environments, belong to a high vacuum state due to the space environment without air, have certain pressure in the operation regions of the common spacecraft, the space station and the planet base station, and have the biggest influence on the space working device, namely high temperature, low temperature and high vacuum degree.
Because the spacecraft, the space station, the celestial sphere base station and other space have the characteristics that the temperature is extremely low or equipment and astronauts need to move in a stable environment, and related mechanical electrical equipment needs to operate in a certain temperature environment, therefore, the spacecraft, the space station and the celestial sphere base station need to be equipped with the environments of temperature, pressure and the like suitable for the survival and operation of the astronauts and the equipment, in order to meet the conditions, some air conditioning equipment is needed to be equipped for adjusting the temperature, various components equipped on the air conditioning equipment are required to have good performance and long operation life, errors influencing the survival and operation of the astronauts and the equipment cannot occur within the specified time, the spacecraft, the space station and the celestial sphere base station need to be capable of maintaining long-term stable operation, high temperature cannot be caused by operation friction, and mechanical abrasion cannot be caused by long operation time, in addition, because the spacecraft, the space station, The space station and the planet base station need to be sent into the space by a rocket or a space plane, the weight is also required to be light on the basis of the required quality, and in order to keep the normal operation of air-conditioning equipment such as the spacecraft, the space station, the planet base station and the like, therefore, the value of the equipment sent into the space is equivalent to the gold value and even higher than the gold value, wherein a compressor motor is one of key components, the performance is directly related to whether the spacecraft, the space station and the planet base station can normally work or not, the life of a spacecraft is also related to, and how to meet the normal operation of the air-conditioning equipment in the space environment is a difficulty for technicians in the field to overcome.
Disclosure of Invention
The invention provides an electric spindle for an air-conditioning compressor in a space environment, aiming at the problems that no air exists in the space, the heat dissipation cannot be realized by utilizing the air circulation as the earth, the temperature is extreme, the requirements of operating equipment in the space fields such as space stations, spacecrafts, planet base stations and the like and the living environments of spacemen and scientific researchers are met, and particularly the environmental temperature needs to be regulated.
The technical scheme of the invention is as follows: an electric main shaft for an air-conditioning compressor in a space environment comprises a main shaft, a rotor and a stator, wherein the rotor is arranged on the periphery of the main shaft, the stator is arranged on the inner periphery of a casing, the main shaft and an outer peripheral rotating part of the main shaft are separated from the inner periphery of the casing and an inner peripheral fixing part of the casing through gas, a plurality of air bearing are arranged between the main shaft and the outer peripheral rotating part of the main shaft, the air bearing comprises an axial air bearing and a radial air bearing, a cooling system is arranged in the casing, the periphery of the casing is provided with an inlet and an outlet of floating gas and cooling liquid, the gas and the cooling liquid are respectively communicated with the air bearing and a cooling inner cavity through a gas channel and a cooling liquid channel, a compressor impeller centering hole or a centering boss is;
furthermore, the main shaft is a stepped shaft, the rear part of the rotor at the small-diameter periphery of the main shaft is provided with a shaft sleeve, the inner periphery of the whole casing is provided with a lining, the stator is arranged at the inner periphery of the lining, two ends of the rotor are provided with magnetism isolating rings, and the rotor is internally provided with a balance ring;
further, a shaft sleeve is arranged on the periphery of the rear part of the main shaft, radial air bearing devices are respectively arranged on the periphery of the front part of the main shaft and the periphery of the shaft sleeve on the rear part of the main shaft, and a plurality of radial bearing throttlers are arranged on the radial air bearing devices;
further, an axial air bearing is arranged in the radial direction of the front end face of the shell, and a plurality of thrust bearing throttlers and gap adjusting rings are arranged on the axial air bearing;
further, the cooling system comprises a plurality of cooling cavities, the plurality of cooling cavities are arranged between the shell and the lining, and at least one of the plurality of cooling cavities is arranged on the periphery of the stator;
furthermore, two ends of the shell are respectively provided with an end cover, wherein the front end cover is fixed on the axial air bearing, the axial air bearing is fixed on the end surface of the shell, and the rear end cover is fixed at the rear end of the shell;
further, the rotor and the stator are a permanent magnet stator and a permanent magnet rotor, and the highest rotating speed of the main shaft is 80000 r/min;
further, a plurality of sealing rings are arranged at the connecting part of the cooling system and the gas channel.
The invention has the beneficial effects that: the air bearing is arranged between the main shaft and the outer periphery rotating part thereof as well as the inner periphery of the shell and the fixing part thereof through gas separation, the isolation space is arranged at the rear end of the rotor, the main shaft can be suspended in the shell, the contact between the main shaft and other parts is reduced, the rotating resistance can be reduced, the rotating energy consumption is reduced, the operation is carried out in a friction-free state, the damage probability of the electric main shaft is reduced, the service life of the electric main shaft is prolonged, the long-life operation in a space environment can be ensured, the temperature generated by the rotor and the stator in the operation process can be reduced by cooling through the arrangement of the cooling liquid channel and the cooling inner cavity between the lining and the shell, and the phenomena of insulation breakdown, coil fusing and the like caused by; the two ends of the rotor are provided with the magnetism isolating rings, and the rotor is internally provided with the balance ring, so that the magnetism of the permanent magnet can be ensured, the influence of the magnetism on other parts can be prevented, the stable rotation of the rotor can be ensured, and the eccentric rotation of the rotor in the rotation process can be prevented; the shaft sleeve is arranged at the periphery of the stator, so that a cooling inner cavity is favorably arranged, particularly, the cooling inner cavity is arranged at the periphery of the stator, the heating of the stator can be prevented, the normal operation of the electric spindle is influenced, the leakage of gas and cooling liquid can be prevented by arranging the sealing rings at the connecting parts of the cooling system and the gas channel, and the stable operation of the cooling system and the air bearing can be ensured. The invention can reduce or eliminate the abrasion of the motor, prevent the motor winding from being damaged by heating, reduce the friction damage parts and prolong the service life of the equipment.
Drawings
FIG. 1 is a schematic cross-sectional view of a pneumatic channel along an electric spindle.
Fig. 2 is a schematic cross-sectional view of the coolant passage of the electric spindle.
Description of reference numerals: 1-rear end cover plug, 2-rear end cover, 3-rear radial air bearing, 4-bush, 5-rear radial bearing restrictor, 6-shaft sleeve, 7-stator, 8-rotor, 9-magnetic isolating ring, 10-balance ring, 11-machine shell, 12-front radial air bearing, 13-front radial bearing restrictor, 14-thrust bearing restrictor I, 15-thrust bearing restrictor II, 16-gap adjusting ring, 17-axial air bearing, 18-front end cover, 19-main shaft, 20-O type sealing ring I, 21-O type sealing ring II, 22-O type sealing ring III, 23-O type sealing ring IV, 24-O type sealing ring V, 25 b-cooling liquid outlet, 25 a-cooling liquid inlet, 25 a-cooling liquid outlet, 25 b-cooling liquid outlet, 25 a-cooling liquid inlet, 2-cooling liquid outlet, 25, 26-fixing screw, 27 a-gas inlet, 27 b-gas outlet, 28-gas channel, 29-cooling liquid channel and 30-cooling inner cavity.
Detailed Description
In order to make those skilled in the art further understand the technical solution of the present invention, the technical solution of the present invention is further described in detail below with reference to the accompanying drawings.
The technical scheme of the invention is an electric spindle for an air-conditioning compressor in a space environment, and fig. 1 is a schematic sectional structure view along an electric spindle pneumatic channel and fig. 2 is a schematic sectional structure view along an electric spindle cooling liquid channel 29. The electric spindle comprises a spindle 19, a rotor 8 and a stator 7, the rotor 8 is arranged on the periphery of the spindle 19, the stator 7 is arranged on the inner periphery of a casing 11, the spindle 19 and the outer periphery rotating part thereof are separated from the inner periphery of the casing 11 and the inner periphery fixing part thereof through gas, a plurality of air bearings are arranged between the spindle 19 and the outer periphery rotating part thereof, the air bearings comprise axial air bearings 17 and radial air bearings, the axial air bearings 17 are thrust bearings, a cooling system is arranged in the casing 11, the outer periphery of the casing 11 is provided with inlets and outlets of floating gas and cooling liquid, 25a is a cooling liquid inlet, 25b is a cooling liquid outlet, 27a is a gas inlet, 27b is a gas outlet, the gas and the cooling liquid are respectively communicated with the air bearings and a cooling inner cavity 30 through a gas channel 28 and a cooling liquid channel 29, and a compressor impeller centering hole or a centering boss.
The main shaft 19 is of a stepped shaft structure, the diameter of the front end of the main shaft 19 is larger than that of the rear end of the main shaft, the rotor 8 is arranged on the periphery of the rear end with a small diameter, the stator 7 is arranged on the inner periphery of the shell 11 corresponding to the periphery of the rotor 8, the main shaft 19 is in contact with the periphery with gas, the rear end of the main shaft 19 is isolated from the rear end cover 2 by using a space, and the rear end cover 2 is provided with a rear end cover plug 1, and 26 are fixing screws of the rear end cover 2.
The rear part of a rotor 8 at the small-diameter periphery of the main shaft 19 is provided with a shaft sleeve 6, the inner periphery of the whole machine shell 11 is provided with a lining 4, a stator 7 is arranged at the inner periphery of the lining 4, two ends of the rotor 8 are provided with magnetism isolating rings 9, and a balance ring 10 is arranged in the rotor 8.
The rear portion periphery of the main shaft 19 is provided with a shaft sleeve 6, the front portion periphery of the main shaft 19 and the periphery of the rear portion shaft sleeve 6 of the main shaft 19 are respectively provided with a front portion radial air bearing 12 and a rear portion radial air bearing 3, and the radial air bearings are provided with a plurality of radial bearing throttles, wherein 5 is a rear portion radial bearing throttle, 13 is a front portion radial bearing throttle, 14 is a thrust bearing throttle I of the axial air bearing, and 15 is a thrust bearing throttle II of the axial air bearing.
An axial air bearing is arranged on the front end face of the casing 11 in the radial direction, and a plurality of axial air bearings 17 throttlers and clearance adjusting rings 16 are arranged on the axial air bearing.
The cooling system includes a plurality of cooling cavities 30, the plurality of cooling cavities 30 being disposed between the casing 11 and the liner 4, at least one of the plurality of cooling cavities 30 being disposed at an outer periphery of the stator 7.
In this embodiment, the coolant is cooled by water, and the lead wire of the motor is introduced from the rear end cap 2 side.
Two ends of the casing 11 are respectively provided with an end cover, wherein the front end cover 18 is fixed on an axial air bearing, the axial air bearing is fixed on the end surface of the casing 11, and the rear end cover 2 is fixed at the rear end of the casing 11.
The rotor 8 and the stator 7 are a permanent magnet stator 7 and a permanent magnet rotor, and the highest rotating speed of the main shaft 19 is 80000 r/min.
The connecting part of the cooling system and the gas channel 28 is provided with a plurality of sealing rings, wherein 20 is an O-shaped sealing ring I, 21 is an O-shaped sealing ring II, 22 is an O-shaped sealing ring III, 23 is an O-shaped sealing ring IV and 24-O-shaped sealing ring V.
According to the invention, the air bearing is arranged at the periphery of the main shaft 19, the isolation space is arranged at the rear end of the rotor 8, the main shaft 19 can be arranged in the casing in a suspended manner, the contact between the main shaft 19 and other components can be reduced, the rotation resistance is reduced, the rotation energy consumption is reduced, the operation is carried out in a friction-free state, the damage probability of the electric main shaft is reduced, the service life of the electric main shaft is prolonged, the long-life operation in a space environment can be ensured, the cooling liquid channel 29 and the cooling inner cavity 30 are arranged between the lining 4 and the casing 11, the temperature generated in the operation process of the rotor 8 and the stator 7 can be reduced by cooling, and the phenomena of insulation breakdown, coil fusing and the like caused by high temperature can be avoided; through arranging the magnetism isolating rings 9 at the two ends of the rotor 8 and arranging the balance ring 10 in the rotor 8, the magnetism of the permanent magnet can be ensured, the influence of the magnetism on other parts can be prevented, the stable rotation of the rotor 8 can be ensured, and the eccentric rotation of the rotor 8 in the rotation process can be prevented; the shaft sleeve 6 is arranged on the periphery of the stator 7, so that the cooling inner cavity 30 is favorably arranged, particularly, the cooling inner cavity 30 is arranged on the periphery of the stator 7, the heat generation of the stator 7 can be prevented, the normal operation of the electric spindle is influenced, the leakage of gas and cooling liquid can be prevented by arranging the sealing rings on the connecting part of the cooling system and the gas channel 28, and the stable operation of the cooling system and the air bearing can be ensured. The invention can reduce or eliminate the abrasion of the motor, prevent the motor winding from being damaged by heating, reduce the friction damage parts and prolong the service life of the equipment.
Claims (9)
1. The utility model provides an electricity main shaft for air condition compressor under space environment, includes main shaft, rotor and stator, its characterized in that: the spindle is characterized in that a rotor is arranged on the periphery of the spindle, a stator is arranged on the inner periphery of the casing, the spindle and the outer periphery rotating part thereof are separated from the inner periphery of the casing and the inner periphery fixing part thereof through gas, a plurality of air bearing are arranged between the spindle and the outer periphery rotating part thereof, the air bearing comprises an axial air bearing and a radial air bearing, a cooling system is arranged in the casing, an inlet and an outlet of floating gas and cooling liquid are arranged on the periphery of the casing, the gas and the cooling liquid are respectively communicated with the air bearing and a cooling inner cavity through a gas channel and a cooling liquid channel, a compressor impeller centering hole or a centering boss is arranged at the front end axial center of the spindle, and.
2. The electric spindle of the air conditioner compressor in the space environment as claimed in claim 1, characterized in that: the main shaft is of a stepped shaft structure, the diameter of the front end of the main shaft is larger than that of the rear end of the main shaft, the rotor is arranged on the small-diameter periphery of the rear end of the main shaft, and a stator is arranged on the inner periphery of the shell corresponding to the outer periphery of the rotor.
3. The electric spindle of the air conditioner compressor in the space environment as claimed in claim 1, characterized in that: the main shaft is a stepped shaft, a shaft sleeve is arranged at the rear part of the rotor on the outer periphery of the small diameter of the main shaft, a bushing is arranged on the inner periphery of the whole casing, the stator is arranged on the inner periphery of the bushing, magnetic isolation rings are arranged at two ends of the rotor, and a balance ring is arranged in the rotor.
4. The electric spindle of the air conditioner compressor in the space environment as claimed in claim 1, characterized in that: the spindle is characterized in that a shaft sleeve is arranged on the periphery of the rear portion of the spindle, radial air bearing devices are respectively arranged on the periphery of the front portion of the spindle and the periphery of the shaft sleeve of the rear portion of the spindle, and a plurality of radial bearing throttlers are arranged on the radial air bearing devices.
5. The electric spindle of the air conditioner compressor in the space environment as claimed in claim 1, characterized in that: the radial direction of the front end face of the shell is provided with an axial air bearing, and the axial air bearing is provided with a plurality of thrust bearing throttlers and a clearance adjusting ring.
6. The electric spindle of the air conditioner compressor in the space environment as claimed in claim 1, characterized in that: the cooling system comprises a plurality of cooling inner cavities, the cooling inner cavities are arranged between the shell and the lining, and at least one cooling inner cavity is arranged on the periphery of the stator.
7. The electric spindle of the air conditioner compressor in the space environment as claimed in claim 1, characterized in that: the two ends of the shell are respectively provided with an end cover, wherein the front end cover is fixed on the axial air bearing, the axial air bearing is fixed on the end surface of the shell, and the rear end cover is fixed at the rear end of the shell.
8. The electric spindle of the air conditioner compressor in the space environment as claimed in claim 1, characterized in that: the rotor and the stator are a permanent magnet stator and a permanent magnet rotor, and the highest rotating speed of the main shaft is 80000 r/min.
9. The electric spindle of the air conditioner compressor in the space environment as claimed in claim 1, characterized in that: and a plurality of sealing rings are arranged at the connecting part of the cooling system and the gas channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110439905.9A CN112953106A (en) | 2021-04-23 | 2021-04-23 | Electric spindle for air-conditioning compressor in space environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110439905.9A CN112953106A (en) | 2021-04-23 | 2021-04-23 | Electric spindle for air-conditioning compressor in space environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112953106A true CN112953106A (en) | 2021-06-11 |
Family
ID=76233340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110439905.9A Pending CN112953106A (en) | 2021-04-23 | 2021-04-23 | Electric spindle for air-conditioning compressor in space environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112953106A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114221518A (en) * | 2021-12-09 | 2022-03-22 | 北京航空航天大学 | Superconducting motor system with air bearing structure |
-
2021
- 2021-04-23 CN CN202110439905.9A patent/CN112953106A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114221518A (en) * | 2021-12-09 | 2022-03-22 | 北京航空航天大学 | Superconducting motor system with air bearing structure |
| CN114221518B (en) * | 2021-12-09 | 2023-02-21 | 北京航空航天大学 | Superconducting motor system with air bearing structure |
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