CN114135393A - Electric auxiliary turbocharger structure - Google Patents
Electric auxiliary turbocharger structure Download PDFInfo
- Publication number
- CN114135393A CN114135393A CN202210003957.6A CN202210003957A CN114135393A CN 114135393 A CN114135393 A CN 114135393A CN 202210003957 A CN202210003957 A CN 202210003957A CN 114135393 A CN114135393 A CN 114135393A
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- Prior art keywords
- hollow shaft
- shaft
- shell
- air
- impeller
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- 238000001816 cooling Methods 0.000 claims description 19
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000004904 shortening Methods 0.000 claims description 2
- 230000001914 calming effect Effects 0.000 claims 1
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
- F02B39/02—Drives of pumps; Varying pump drive gear ratio
- F02B39/08—Non-mechanical drives, e.g. fluid drives having variable gear ratio
- F02B39/10—Non-mechanical drives, e.g. fluid drives having variable gear ratio electric
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
Abstract
The invention discloses an electric auxiliary turbocharger structure which is used for improving the performance of a turbocharger under the condition of low load of a diesel engine. An electric auxiliary turbocharger structure comprises an impeller housing of a turbocharger, a turbine shaft, a gas compression impeller arranged on the turbine shaft, and an impeller locking nut in threaded fit on the turbine shaft, wherein a flange is sleeved at one end, extending out of the impeller locking nut, of the turbine shaft, and is axially locked through a shaft sleeve in threaded fit on the turbine shaft; the high-speed permanent magnet motor is provided with a shell, a motor stator and a motor rotor, the shell is fixed in an impeller housing of the turbocharger, and one end of the motor rotor is coaxially fixed on the flange plate through a connecting bolt.
Description
Technical Field
The invention relates to the technical field of turbochargers, in particular to an electric auxiliary turbocharger structure.
Background
The electric auxiliary turbocharger can optimize the low working condition performance of the diesel engine and improve the fuel economy of the diesel engine, and is a trend of the technical development of the turbocharger. Because the exhaust gas quantity is insufficient when the diesel engine runs at low load, and the turbocharger cannot provide enough air for the turbocharger to optimize the engine performance to the maximum, an electric auxiliary turbocharger is adopted, a specially designed high-speed permanent magnet motor is installed on the turbocharger, the high-speed permanent magnet motor applies torque to a rotor of the turbocharger, so that the speed of the rotor can be maintained or changed under the condition of low exhaust gas quantity of the engine, and therefore enough compressed air is provided for the engine.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an electric auxiliary turbocharger structure which is used for improving the performance of a turbocharger at the low load of a diesel engine.
The purpose of the invention is realized as follows:
an electric auxiliary turbocharger structure comprises a turbine wheel cover of a turbocharger, a turbine shaft, a gas compressing impeller arranged on the turbine shaft, and an impeller locking nut in threaded fit on the turbine shaft,
one end of the turbine shaft, which extends out of the impeller locking nut, is sleeved with a flange which is axially locked through a shaft sleeve in threaded fit on the turbine shaft;
the high-speed permanent magnet motor is provided with a shell, a motor stator and a motor rotor, the shell is fixed in an impeller housing of the turbocharger, and one end of the motor rotor is coaxially fixed on the flange plate through a connecting bolt.
Preferably, the motor rotor comprises a hollow shaft, a coil arranged on the hollow shaft, and an end turn in threaded fit on the hollow shaft, wherein the end turn is matched with a step arranged on the hollow shaft to lock the coil.
Preferably, one end of the hollow shaft fixed with the flange is disc-shaped.
Preferably, the notch cuttype is personally submitted in the periphery of axle sleeve, the ring flange passes through hole axle cooperation step location and installs on the axle sleeve, one section that the axle sleeve is adjacent with the hollow shaft is equipped with the hexagonal structure.
Preferably, the matching part of the shaft sleeve and the flange is coated with a wear-resistant coating.
Preferably, gaps are arranged among the hollow shaft, the flange plate and the shell to serve as air flow channels, a first cooling channel is formed between the shell and the impeller housing, a gap is arranged between the shell and the motor stator to form a second cooling channel, and a gap is arranged between the motor stator and the motor rotor to form a third cooling channel.
Preferably, the shape of the shell is a streamline shape convenient for air intake of the supercharger, and the shell and an inner flow passage of the compressor impeller are in smooth transition, so that air intake loss is reduced.
Preferably, an annular cavity is arranged between the hollow shaft and the shaft sleeve, the part of the hollow shaft corresponding to the annular cavity is arc-shaped, so that the annular cavity forms an arc-shaped cavity, the volume of the annular cavity is enlarged, the distance between the annular cavity and the third cooling channel is shortened, air in the arc-shaped cavity is cooled through the third cooling channel, the arc-shaped cavity is adjacent to an inner hole of the hollow shaft, and in the working state of the high-speed permanent magnet motor, annular air flow is formed in the arc-shaped cavity and exchanges heat with air in the hollow shaft, so that cooling for the interior of the hollow shaft is formed.
Preferably, a gap is formed at the matching position of the hollow shaft and the flange plate, so that heat exchange is carried out between air in the circular arc-shaped cavity and air in the air flow channel.
Preferably, interference magnitude exists between the shaft sleeve and the impeller locking nut as well as between the shaft sleeve and the end face of the hollow shaft; the end face of the hollow shaft is simultaneously contacted with the end face of the shaft sleeve and the end face of the turbine shaft.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
according to the invention, the high-speed permanent magnet motor is arranged in the impeller housing, the shaft of the high-speed permanent magnet motor is connected with the shaft of the turbocharger through the flange, the flange is in interference fit with the shaft sleeve, and torque is transmitted through friction, so that when the shaft of the high-speed permanent magnet motor rotates, the turbocharger is driven to rotate, and electric auxiliary pressurization is realized.
The high-speed permanent magnet motor is connected with the turbocharger, the turbocharger is driven to rotate by the high-speed permanent magnet motor to replace an air inlet blower, the high-speed permanent magnet motor and the turbocharger are simple and reliable in connection mode, the threaded shaft sleeve and the flange plate are simple to mount and dismount, and the high-speed permanent magnet motor has the characteristics of small structure, convenience in mounting, stability and reliability in operation and the like.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged partial schematic view of FIG. 1;
FIG. 3 is a schematic view of a bushing;
fig. 4 is an air flow diagram of the cooling structure of the present invention.
Reference numerals
In the attached drawing, 1-shell, 2-motor stator, 3-shaft sleeve, 4-connecting bolt, 5-impeller locking nut, 6-compressed air impeller, 7-turbine shaft, 8-flange, 9-hollow shaft, 10-coil and 11-end turn.
Detailed Description
Mode for the invention hereinafter, a detailed description will be given of a specific embodiment of the present invention in conjunction with the accompanying drawings.
As shown in fig. 1 to 4, the electric assist turbocharger structure according to the embodiment of the present invention includes: the motor stator comprises a shell 1, a motor stator 2, a shaft sleeve 3, a connecting bolt 4, an impeller locking nut 5, a compressed air impeller 6, a turbine shaft 7, a flange plate 8, a hollow shaft 9, a coil 10 and an end turn 11. The high-speed permanent magnet motor shaft 9 is designed to be of a special-shaped hollow structure, the hollow shaft 9 is in a stepped form, the right side of the shaft is processed to be of a disc-shaped structure matched with the flange plate 8, the left side of the shaft is processed to be provided with an annular notch, the end turns 11 are convenient to install, the middle part of the shaft is matched with the coil 10, after the hollow shaft 9 is installed in place, the end face of the right side of the shaft is in contact with the end faces of the shaft sleeve 3 and the turbine shaft 7, the purpose of design is to improve the operation stability of the hollow shaft 9, the purpose of designing the hollow shaft is to reduce the rotational inertia of the shaft, meanwhile, the heat productivity of the high-speed permanent magnet motor can be greatly reduced by adopting air convection heat exchange, and the service life of the high-speed permanent magnet motor is prolonged. The high-speed permanent magnet motor shaft 9 adopts a cantilever beam arrangement form, and structures such as bearings and the like are eliminated, so that the structure of the high-speed permanent magnet motor is greatly simplified. The motor stator is arranged in the high-speed permanent magnet motor shell, and the end face of the inner hole of the stator is chamfered. The appearance of the high-speed permanent magnet motor shell is designed to be streamline, an inner hole is matched with the motor stator, a certain gap is reserved between the inner hole and the motor stator, and the end face of the inner hole is processed to be streamline and matched with the end face of the motor stator.
Milling has the hexagonal structure on axle sleeve 3, only need during installation, dismantlement with turbine shaft 7 locking, adopt torque wrench to carry out the axle sleeve installation and dismantle, axle sleeve 3 left side terminal surface and the contact of hollow shaft 9 right side terminal surface to there is a little magnitude of interference, this hollow shaft operating stability will be improved greatly.
The contact part of the right side of the hollow shaft 9 and the end face of the shaft sleeve 3 is designed into an arc-shaped structure, so that the centrifugal force borne by the high-speed permanent magnet motor during rotation can be reduced, the inertia of the hollow shaft is reduced, meanwhile, the stress of the hollow shaft can be reduced by the arc-shaped structure, the stress distribution is improved, the stress concentration is reduced, and the high-cycle fatigue life of the hollow shaft is prolonged. Meanwhile, the cavity surrounded by the arc-shaped area is filled with air, and when the hollow shaft rotates, the air is sucked into the cavity to exchange heat with the air in the arc-shaped cavity in a convection mode, so that the temperature of the hollow shaft is reduced. A gap exists at the matching position of the hollow shaft and the flange (a certain gap exists between the outer circular surface of the flange and the inner circular surface of the hollow shaft of the high-speed permanent magnet motor, and a certain gap exists between the end surface of the left side of the flange and the hollow shaft of the high-speed permanent magnet motor), so that the shaft of the high-speed permanent magnet motor is convenient to disassemble.
When the air compressor impeller rotates, negative pressure is formed at the head part (near the high-speed motor) of the air compressor impeller to promote air to be continuously sucked by the air compressor impeller, the flow direction of the air in the high-speed permanent magnet motor is shown as an arrow in figure 4, the air flows along the wall surface of the motor shell to take away the heat of the motor shell, the air also flows along the gap between the motor shell and the stator to take away the heat of the stator, meanwhile, air flows along the gap between the coil and the stator to take away the heat of the coil, the air flowing at high speed is continuously mixed with the air generated by friction in the hollow shaft of the high-speed motor to carry out convection heat exchange, therefore, the motor is cooled by the air sucked by the rotation of the air compressing impeller through a special design, the heat productivity of the motor is greatly reduced, an additional cooling device is reduced, and the service life of the motor is prolonged.
The cooling structure is as follows: gaps are arranged among the hollow shaft, the flange plate and the shell and are used as air flow channels, a first cooling channel is formed between the shell and the impeller housing, a gap is arranged between the shell and the motor stator to form a second cooling channel, and a gap is arranged between the motor stator and the motor rotor to form a third cooling channel. An annular cavity is arranged between the hollow shaft and the shaft sleeve, the part of the hollow shaft corresponding to the annular cavity is arc-shaped, the annular cavity forms an arc-shaped cavity, the annular cavity is used for expanding the volume of the annular cavity and shortening the distance between the annular cavity and the third cooling channel, air in the arc-shaped cavity is cooled through the third cooling channel, the arc-shaped cavity is adjacent to an inner hole of the hollow shaft, and under the working state of the high-speed permanent magnet motor, annular air flow is formed in the arc-shaped cavity and exchanges heat with the air in the hollow shaft to cool the interior of the hollow shaft. A gap is formed at the matching position of the hollow shaft and the flange plate, so that heat exchange is carried out between air in the circular arc-shaped cavity and air in the air flow channel.
The hollow shaft of the high-speed permanent magnet motor and the matched flange have certain gaps with the shell of the high-speed permanent magnet motor, the gaps are air flow channels, the appearance of the motor is designed to be streamline, air can be conveniently fed into the supercharger, and meanwhile, the shell of the motor and the inner flow channel of the air compression impeller are in smooth transition, so that air inlet loss is reduced.
After lock nut 5 installed in place, install ring flange 8 on axle sleeve 3 through the frock, install axle sleeve 3 on turbine shaft 7 again, connect hollow shaft 9 on ring flange 8 through bolt 4, install the coil on motor stator 2, install motor stator 2 in the shell 1, install shell 1 in turbo charger impeller housing, accomplish high-speed permanent-magnet machine installation promptly, axle sleeve 3 scribbles wear-resistant coating with ring flange 8 cooperation department, the life of axle sleeve 3 and ring flange 8 has been improved, after axle sleeve 3 and ring flange 8 wear, only need change it, need not maintain the hollow shaft, reduce cost of maintenance.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides an electronic supplementary turbo charger structure, includes turbo charger's impeller housing, turbine shaft, installs the impeller of calming anger on the turbine shaft to and screw-thread fit is in impeller lock nut on the turbine shaft, its characterized in that:
one end of the turbine shaft, which extends out of the impeller locking nut, is sleeved with a flange which is axially locked through a shaft sleeve in threaded fit on the turbine shaft;
the high-speed permanent magnet motor is provided with a shell, a motor stator and a motor rotor, the shell is fixed in an impeller housing of the turbocharger, and one end of the motor rotor is coaxially fixed on the flange plate through a connecting bolt.
2. An electric assist turbocharger structure according to claim 1, wherein: the motor rotor comprises a hollow shaft, a coil arranged on the hollow shaft and an end turn in threaded fit with the hollow shaft, wherein the end turn is matched with a step arranged on the hollow shaft to lock the coil.
3. An electric assist turbocharger structure according to claim 2, wherein: and one end of the hollow shaft, which is fixed with the flange plate, is disc-shaped.
4. An electric assist turbocharger structure according to claim 2, wherein: the notch cuttype is personally submitted to the periphery of axle sleeve, the ring flange passes through hole axle cooperation step location and installs on the axle sleeve, one section that the axle sleeve is adjacent with the hollow shaft is equipped with the hexagonal structure.
5. An electric assist turbocharger structure according to claim 4, wherein: and the matching part of the shaft sleeve and the flange plate is coated with a wear-resistant coating.
6. An electric assist turbocharger structure according to claim 2 or 4, wherein: gaps are arranged among the hollow shaft, the flange plate and the shell and are used as air flow channels, a first cooling channel is formed between the shell and the impeller housing, a gap is arranged between the shell and the motor stator to form a second cooling channel, and a gap is arranged between the motor stator and the motor rotor to form a third cooling channel.
7. An electric assist turbocharger structure according to claim 6, wherein: the appearance of the shell is a streamline shape which is convenient for the air inlet of the supercharger, and the shell and the inner flow passage of the air compressing impeller are in smooth transition, so that the air inlet loss is reduced.
8. An electric assist turbocharger structure according to claim 6, wherein: an annular cavity is arranged between the hollow shaft and the shaft sleeve, the part of the hollow shaft corresponding to the annular cavity is arc-shaped, the annular cavity forms an arc-shaped cavity, the annular cavity is used for expanding the volume of the annular cavity and shortening the distance between the annular cavity and the third cooling channel, air in the arc-shaped cavity is cooled through the third cooling channel, the arc-shaped cavity is adjacent to an inner hole of the hollow shaft, and under the working state of the high-speed permanent magnet motor, annular air flow is formed in the arc-shaped cavity and exchanges heat with the air in the hollow shaft to cool the interior of the hollow shaft.
9. An electric assist turbocharger structure according to claim 8, wherein: a gap is formed at the matching position of the hollow shaft and the flange plate, so that heat exchange is carried out between air in the circular arc-shaped cavity and air in the air flow channel.
10. An electric assist turbocharger structure according to claim 2, wherein: interference magnitude exists between the shaft sleeve and the impeller locking nut as well as between the shaft sleeve and the end face of the hollow shaft; the end face of the hollow shaft is simultaneously contacted with the end face of the shaft sleeve and the end face of the turbine shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210003957.6A CN114135393B (en) | 2022-01-05 | Electric auxiliary turbocharger structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210003957.6A CN114135393B (en) | 2022-01-05 | Electric auxiliary turbocharger structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114135393A true CN114135393A (en) | 2022-03-04 |
| CN114135393B CN114135393B (en) | 2024-06-11 |
Family
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007141968A1 (en) * | 2006-06-02 | 2007-12-13 | Ihi Corporation | Electric supercharger |
| DE102007043656A1 (en) * | 2007-09-13 | 2009-05-07 | Siemens Ag | Electrical machine has rotor supported on hollow shaft, where hollow shaft is formed in inner side of closed hollow space and stator is arranged within housing |
| CN108775289A (en) * | 2018-05-23 | 2018-11-09 | 北京石油化工学院 | A kind of self-cooling type air suspension compressor with gas storage function |
| CN110500300A (en) * | 2019-08-02 | 2019-11-26 | 烟台菱辰能源有限公司 | A kind of spiral vortex type hydrogen circulating pump |
| CN110985199A (en) * | 2019-12-20 | 2020-04-10 | 中国北方发动机研究所(天津) | Electric auxiliary booster structure based on ducted-air gap air intake |
| CN211791059U (en) * | 2020-05-14 | 2020-10-27 | 重庆江增船舶重工有限公司 | Cooling structure of electric supercharger motor |
| CN112539090A (en) * | 2020-10-30 | 2021-03-23 | 新乡航空工业(集团)有限公司 | Boost type air-floating turbine cooler structure for pod |
| CN113572298A (en) * | 2020-04-29 | 2021-10-29 | Lg电子株式会社 | Motor assembly and hair dryer with same |
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007141968A1 (en) * | 2006-06-02 | 2007-12-13 | Ihi Corporation | Electric supercharger |
| DE102007043656A1 (en) * | 2007-09-13 | 2009-05-07 | Siemens Ag | Electrical machine has rotor supported on hollow shaft, where hollow shaft is formed in inner side of closed hollow space and stator is arranged within housing |
| CN108775289A (en) * | 2018-05-23 | 2018-11-09 | 北京石油化工学院 | A kind of self-cooling type air suspension compressor with gas storage function |
| CN110500300A (en) * | 2019-08-02 | 2019-11-26 | 烟台菱辰能源有限公司 | A kind of spiral vortex type hydrogen circulating pump |
| CN110985199A (en) * | 2019-12-20 | 2020-04-10 | 中国北方发动机研究所(天津) | Electric auxiliary booster structure based on ducted-air gap air intake |
| CN113572298A (en) * | 2020-04-29 | 2021-10-29 | Lg电子株式会社 | Motor assembly and hair dryer with same |
| CN211791059U (en) * | 2020-05-14 | 2020-10-27 | 重庆江增船舶重工有限公司 | Cooling structure of electric supercharger motor |
| CN112539090A (en) * | 2020-10-30 | 2021-03-23 | 新乡航空工业(集团)有限公司 | Boost type air-floating turbine cooler structure for pod |
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