CN113530878B - Main shaft connecting structure of turbocharger - Google Patents
Main shaft connecting structure of turbocharger Download PDFInfo
- Publication number
- CN113530878B CN113530878B CN202110888065.4A CN202110888065A CN113530878B CN 113530878 B CN113530878 B CN 113530878B CN 202110888065 A CN202110888065 A CN 202110888065A CN 113530878 B CN113530878 B CN 113530878B
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- China
- Prior art keywords
- main shaft
- shaft
- sleeve
- triangular
- bolt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 14
- 239000010959 steel Substances 0.000 claims abstract description 14
- 230000000903 blocking effect Effects 0.000 claims description 5
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000411 inducer Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/053—Shafts
- F04D29/054—Arrangements for joining or assembling shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/02—Blade-carrying members, e.g. rotors
- F01D5/025—Fixing blade carrying members on shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/053—Shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
-
- 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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/266—Rotors specially for elastic fluids mounting compressor rotors on shafts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
Abstract
The invention discloses a main shaft connecting structure of a turbocharger, which comprises a main shaft, a thrust bearing body, a pressure end shaft sleeve, a nut, a main shaft bolt, a triangular shaft, a compressor impeller, a wheel disc, a center positioning table, a pin and a positioning surface, wherein the main shaft is connected with the thrust bearing body through the pin; one end of the main shaft is fixedly connected with the wheel disc through a pin, a central positioning table and a bolt, the other end of the main shaft is connected with the thrust bearing body and the end pressing shaft sleeve through a triangular shaft, a positioning surface is arranged among the end pressing shaft sleeve, the main shaft and the thrust bearing body, the compressor impeller is connected with the main shaft through the end pressing shaft sleeve, the compressor impeller, the end pressing shaft sleeve and the thrust bearing body are axially pressed on the main shaft through a main shaft bolt, and a nut is arranged at one end of the main shaft bolt. The air compressor impeller is assembled with the steel pressure end shaft sleeve in an interference way and positioned on the pressure end shaft sleeve with the main shaft, so that the problems that the inner hole of the aluminum alloy air compressor impeller with the old structure is expanded due to the centrifugal force effect when the rotor rotates, the main shaft cannot be positioned and the like are avoided, and the energy of the turbine end is transmitted to the air compressor impeller to compress air through the main shaft connection.
Description
Technical Field
The invention relates to the field of diesel engine accessories, in particular to a main shaft connecting structure of a turbocharger.
Background
In the existing turbocharger rotor structure, a turbine wheel disc is positioned with a main shaft through a pin and a center positioning table, and the main shaft is connected with the wheel disc through bolts. The other end of the main shaft is assembled and connected through the compressor impeller to transmit torque. The bearing sleeve compresses the upper shaft part by being in transition fit with the main shaft and by leaning on the main shaft nut. The inducer and the impeller are connected into a compressor working wheel through the interference fit of the pin and the bush. Therefore, the existing structure is complicated to install, the structure is complex, the positioning precision of single parts is poor, the influence on the dynamic balance of the rotor is large, and the dynamic balance repeatability is poor; the inner hole and the main shaft are adopted for positioning the aerostatic impeller, because the aerostatic impeller is made of aluminum alloy, the inner hole is expanded outwards under the action of centrifugal force when the rotor rotates, a gap is formed between the inner hole of the aerostatic impeller and the bushing, so that the dynamic unbalance of the rotor is increased, the bearing is burnt, and the fault occurs.
Disclosure of Invention
The invention provides a main shaft connecting structure of a turbocharger, which aims to solve the problem of increasing dynamic unbalance of a rotor.
In order to achieve the above object, the technical scheme of the present invention is as follows:
a turbocharger main shaft connection structure, characterized by comprising: the device comprises a main shaft, a thrust bearing body, a pressure end shaft sleeve, a nut, a main shaft bolt, a triangular shaft and a compressor impeller;
Triangular holes are formed in the thrust bearing body and the pressure end shaft sleeve;
One end of the main shaft is provided with a triangular shaft;
The thrust bearing body is connected with the triangular shaft through a triangular hole, the end pressing shaft sleeve is connected with the triangular shaft through a triangular hole, and the triangular shaft is connected with the main shaft through a bolt;
The compressor impeller, the end pressing shaft sleeve and the thrust bearing body are sleeved on the main shaft in an interference fit mode, the main shaft is pressed on the main shaft through the main shaft bolt, and the nut is arranged at one end of the main shaft bolt.
Further, the device also comprises a positioning surface, wherein the positioning surface is arranged among the end pressing shaft sleeve, the main shaft and the thrust bearing body.
Furthermore, the two ends of the spindle bolt are provided with threads, and one end connected with the spindle is further provided with a positioning table and a stopping table.
Furthermore, the end pressing shaft sleeve is provided with an oil blocking edge close to the outer side of the turbine end.
Further, the oil blocking edge is at an angle of 110-150 degrees relative to the thrust end face of the end pressing shaft sleeve.
Further, the device also comprises a flow guiding sleeve, wherein the flow guiding sleeve is positioned at one end of the spindle bolt, which is provided with the nut.
Further, the guide sleeve is conical.
Further, the outer end face of the end pressing shaft sleeve is a reverse thread.
Furthermore, the flange surface of the nut is triangular, the inner hole is provided with threads, and the lower part of the flange surface is a cylindrical surface.
Further, the device also comprises a center positioning table and a pin, wherein one end of the main shaft is fixedly connected with the wheel disc through the pin and the center positioning table.
Further, the main shaft is connected with the turbine disc through a pin and the center positioning table.
The beneficial effects are that: the air compressor impeller and the steel pressure end shaft sleeve are assembled in an interference manner, and are positioned on the pressure end shaft sleeve together with the main shaft, so that the problems that the inner hole of the aluminum alloy air compressor impeller with an old structure is swelled due to the centrifugal force effect when the rotor rotates, the air compressor impeller cannot be positioned together with the main shaft, the unbalance amount of guide actuation is increased, the rotation of the rotor is unstable, the abrasion of the bearing is aggravated and even the failure is avoided, and the like are avoided. The triangular shaft structure increases the rigidity of the shaft, and the positioning and the processing of the main shaft, the pressing end shaft sleeve and the thrust bearing body ensure the consistency of assembly and the repeatability and the quality stability of the dynamic balance of the rotor.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of the device of the present invention;
FIG. 2 is a schematic diagram of the assembly of a rotor and a spindle of the device of the present invention;
FIG. 3 is a schematic view of a positioning surface of the present invention;
FIG. 4 is a triangular axial cross-section of the present invention;
FIG. 5 is a schematic view of a front view of a nut structure of the present invention;
FIG. 6 is a schematic side view of a nut structure of the present invention;
FIG. 7 is a cross-sectional view of a press end sleeve according to the present invention.
Wherein, 1, a main shaft; 2. a thrust bearing body; 3. pressing an end shaft sleeve; 4. a nut; 5. a spindle bolt; 6. a triangular shaft; 7. a compressor wheel; 8. a diversion sleeve; 9. a wheel disc; 10. a center positioning table; 11. a pin; 12. a positioning surface; 13. a positioning table; 14. a stop table; 15. an oil blocking edge; 16. a thrust end face; 17. and (5) reversely threading.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The present embodiment provides a turbocharger main shaft connection structure, as shown in fig. 1 to 7, including: comprising the following steps: the device comprises a main shaft 1, a thrust bearing body 2, a pressure end shaft sleeve 3, a nut 4, a main shaft bolt 5, a triangular shaft 6 and a compressor impeller 7;
Triangular holes are formed in the thrust bearing body 2 and the end pressing shaft sleeve 3;
one end of the main shaft 1 is provided with a triangular shaft 6;
The thrust bearing body 2 is connected with the triangular shaft 6 through a triangular hole, the end pressing shaft sleeve 3 is connected with the triangular shaft 6 through a triangular hole, and the triangular shaft 6 is connected with the main shaft bolt 5;
The compressor impeller 7 and the end pressing shaft sleeve 3 are assembled on the main shaft 1 in an interference mode, the compressor impeller 7, the end pressing shaft sleeve 3 and the thrust bearing body 2 are sleeved on the main shaft 1 and are pressed on the main shaft 1 through the main shaft bolt 5, and the nut 4 is arranged at one end of the main shaft bolt 5.
The air compressor impeller and the steel pressure end shaft sleeve are assembled in an interference manner, and are positioned on the pressure end shaft sleeve together with the main shaft, so that the problems that the inner hole of the aluminum alloy air compressor impeller with an old structure is swelled due to the centrifugal force effect when the rotor rotates, the air compressor impeller cannot be positioned together with the main shaft, the unbalance amount of guide actuation is increased, the rotation of the rotor is unstable, the abrasion of the bearing is aggravated and even the failure is avoided, and the like are avoided.
In the specific embodiment, the positioning of the compressor impeller 7 and the main shaft 1 is realized through the steel end pressing shaft sleeve 3, so that the problem that the inner hole of the aluminum alloy compressor impeller in the prior art is deformed (hole expansion, hole diameter is enlarged, interference becomes excessive connection, and dynamic unbalance is enlarged) and cannot be positioned accurately is solved.
The air compressor impeller and the steel pressure end shaft sleeve are assembled in an interference manner, and are positioned on the pressure end shaft sleeve together with the main shaft, so that the problems that the inner hole of the aluminum alloy air compressor impeller with an old structure is swelled due to the centrifugal force effect when the rotor rotates, the air compressor impeller cannot be positioned together with the main shaft, the unbalance amount of guide actuation is increased, the rotation of the rotor is unstable, the abrasion of the bearing is aggravated and even the failure is avoided, and the like are avoided. The triangular shaft structure increases the rigidity of the shaft, and the positioning and the processing of the main shaft, the pressing end shaft sleeve and the thrust bearing body ensure the consistency of assembly and the repeatability and the quality stability of the dynamic balance of the rotor.
In a specific embodiment, the device further comprises a positioning surface 12, wherein the positioning surface 12 is arranged among the end pressing shaft sleeve 3, the main shaft 1 and the thrust bearing body 2. The positioning surface 12 is used for ensuring concentricity during assembling of the end pressing shaft sleeve and the impeller, concentricity during assembling of the thrust bearing body and the main shaft and precision of dynamic unbalance during rotation, and reducing influence of assembling on rotor unbalance.
In a specific embodiment, the two ends of the spindle bolt 5 are provided with threads, wherein one end connected with the spindle 1 is further provided with a positioning table 13 and a stopping table 14.
In a specific embodiment, the end pressing sleeve 3 is provided with a blocking edge 15 near the outer side of the turbine end for sealing lubricating oil coming to the bearing.
In a specific embodiment, the angle of the oil deflector 15 relative to the thrust end face 16 of the press end sleeve 3 is 110 ° to 150 °.
In a specific embodiment, one end of the spindle bolt 5 provided with the nut 4 is provided with 1 guide sleeve 8 with a conical outer surface, so that air flow entering the compressor impeller is smooth, and the guide sleeve 8 is screwed on the spindle bolt 5.
In a specific embodiment, the spindle bolt 5 is a long bolt. The long bolt is elastically deformed to assemble and compress the main shaft 1 and the compressor impeller 7.
In a specific embodiment, the outer end surface of the end pressing shaft sleeve 3 is a reverse thread and can be used for lubricating oil sealing.
In a specific embodiment, the flange surface of the nut 4 is triangular in shape and is used for disassembly; the inner hole is a thread, the inner hole is screwed on the main shaft bolt 5 to compress the assembly component, the lower part of the flange surface is a cylindrical surface, and the auxiliary positioning of the compressor impeller 7 is realized.
In a specific embodiment, the spindle 1 is connected to a turbine disk by pins and the centering table 10.
In the specific embodiment, the device further comprises a center positioning table 10 and a pin 11, wherein one end of the spindle 1 is fixedly connected with the wheel disc 9 through the pin 11 and the center positioning table 10. The main shaft 1 is connected with a turbine disc through pins and the center positioning table 10.
By using the main shaft connecting structure of the turbocharger, when the rotor dynamic balance test is repeatedly performed in actual work, the difference of the residual unbalance amount is reduced to about 0.2g from more than 1g at each interval, the vibration value and the stability of the turbocharger during the test are improved, and through statistics, the one-time qualification rate of the batch supercharger platform factory test is improved to 80-90% from 70-80%, the bearing burning failure rate is reduced to within 1% from 5%, and the maintenance period is prolonged to 5 years (90 km) from 2 years (or 30 km).
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; while the invention will be appreciated with reference to the foregoing embodiments, it will be appreciated that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (5)
1. A turbocharger main shaft connection structure, characterized by comprising: the device comprises a main shaft (1), a thrust bearing body (2), a steel pressure end shaft sleeve (3), a nut (4), a main shaft bolt (5), a triangular shaft (6), a compressor impeller (7) and a wheel disc (9);
Triangular holes are formed in the thrust bearing body (2) and the steel pressure end shaft sleeve (3);
One end of the main shaft (1) is provided with a triangular shaft (6);
The thrust bearing body (2) is connected with the triangular shaft (6) through a triangular hole, the steel pressure end shaft sleeve (3) is connected with the triangular shaft (6) through a triangular hole, and the triangular shaft (6) is connected with the main shaft bolt (5);
The compressor impeller (7) and the steel pressure end shaft sleeve (3) are assembled on the main shaft (1) in an interference mode, the compressor impeller (7), the steel pressure end shaft sleeve (3) and the thrust bearing body (2) are sleeved on the main shaft (1) and are tightly pressed on the main shaft (1) through the main shaft bolt (5), and one end of the main shaft bolt (5) is provided with the nut (4);
The device also comprises a positioning surface (12), wherein the positioning surface (12) is arranged among the steel end pressing shaft sleeve (3), the main shaft (1) and the thrust bearing body (2);
Threads are arranged at two ends of the main shaft bolt (5), and a positioning table (13) and a stopping table (14) are further arranged at one end connected with the main shaft (1);
the outer side of the steel pressure end shaft sleeve (3) close to the turbine end is provided with an oil blocking edge (15);
the outer end surface of the steel pressure end shaft sleeve (3) is provided with a reverse thread (17);
The device also comprises a center positioning table (10) and a pin (11), wherein one end of the main shaft (1) is fixedly connected with the wheel disc (9) through the pin (11) and the center positioning table (10);
the main shaft (1) is connected with the turbine disc through a pin and the center positioning table (10).
2. A turbocharger spindle connection as set forth in claim 1, wherein: the angle of the oil baffle edge (15) relative to the thrust end face (16) of the steel pressure end shaft sleeve (3) is 110-150 degrees.
3. A turbocharger spindle connection structure as set forth in claim 2, wherein: the novel spindle bolt is characterized by further comprising a guide sleeve (8), wherein the guide sleeve (8) is positioned at one end of the spindle bolt (5) where the nut (4) is arranged.
4. A turbocharger spindle connection as set forth in claim 3 wherein: the flow guiding sleeve (8) is conical.
5. A turbocharger spindle connection structure as set forth in claim 4, wherein: the flange surface of the nut (4) is triangular, the inner hole is provided with threads, and the lower part of the flange surface is a cylindrical surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110888065.4A CN113530878B (en) | 2021-08-03 | 2021-08-03 | Main shaft connecting structure of turbocharger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110888065.4A CN113530878B (en) | 2021-08-03 | 2021-08-03 | Main shaft connecting structure of turbocharger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113530878A CN113530878A (en) | 2021-10-22 |
| CN113530878B true CN113530878B (en) | 2024-06-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110888065.4A Active CN113530878B (en) | 2021-08-03 | 2021-08-03 | Main shaft connecting structure of turbocharger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113530878B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114278606A (en) * | 2021-12-28 | 2022-04-05 | 北京动力机械研究所 | Multi-working-medium helium gas compressor main shaft structure |
| CN114941661B (en) * | 2022-06-13 | 2023-06-27 | 贵州永红航空机械有限责任公司 | Combined shaft for dynamic balance test of oil mist separator impeller |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200949485Y (en) * | 2006-09-05 | 2007-09-19 | 大连经济技术开发区泽通机械有限公司 | Improvement of turbocharger structure used in vehicle diesel engine |
| CN107387174A (en) * | 2017-07-25 | 2017-11-24 | 湖南天雁机械有限责任公司 | Turbocharger with angular contact ceramic ball bearing |
| CN207297108U (en) * | 2017-10-10 | 2018-05-01 | 大连恒通机车配件有限公司 | A kind of rotor structure of exhaust-driven turbo-charger exhaust-gas turbo charger |
| CN112360573A (en) * | 2020-10-26 | 2021-02-12 | 北京动力机械研究所 | Compact radial flow turbine thermoelectric conversion system rotating assembly |
| CN112360574A (en) * | 2020-10-26 | 2021-02-12 | 北京动力机械研究所 | Rotating assembly structure of high-speed low-stress turbine power generation system |
| CN215719752U (en) * | 2021-08-03 | 2022-02-01 | 中车大连机车研究所有限公司 | Main shaft connecting structure of turbocharger |
-
2021
- 2021-08-03 CN CN202110888065.4A patent/CN113530878B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200949485Y (en) * | 2006-09-05 | 2007-09-19 | 大连经济技术开发区泽通机械有限公司 | Improvement of turbocharger structure used in vehicle diesel engine |
| CN107387174A (en) * | 2017-07-25 | 2017-11-24 | 湖南天雁机械有限责任公司 | Turbocharger with angular contact ceramic ball bearing |
| CN207297108U (en) * | 2017-10-10 | 2018-05-01 | 大连恒通机车配件有限公司 | A kind of rotor structure of exhaust-driven turbo-charger exhaust-gas turbo charger |
| CN112360573A (en) * | 2020-10-26 | 2021-02-12 | 北京动力机械研究所 | Compact radial flow turbine thermoelectric conversion system rotating assembly |
| CN112360574A (en) * | 2020-10-26 | 2021-02-12 | 北京动力机械研究所 | Rotating assembly structure of high-speed low-stress turbine power generation system |
| CN215719752U (en) * | 2021-08-03 | 2022-02-01 | 中车大连机车研究所有限公司 | Main shaft connecting structure of turbocharger |
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| Publication number | Publication date |
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| CN113530878A (en) | 2021-10-22 |
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