CN111663965A - Mixed flow turbocharger vortex end sealing structure for sequential pressurization mode - Google Patents
Mixed flow turbocharger vortex end sealing structure for sequential pressurization mode Download PDFInfo
- Publication number
- CN111663965A CN111663965A CN202010716217.8A CN202010716217A CN111663965A CN 111663965 A CN111663965 A CN 111663965A CN 202010716217 A CN202010716217 A CN 202010716217A CN 111663965 A CN111663965 A CN 111663965A
- Authority
- CN
- China
- Prior art keywords
- oil
- oil baffle
- bearing
- baffle plate
- vortex
- 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.)
- Pending
Links
Images
Classifications
-
- 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
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
-
- 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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
-
- 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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
- F01D25/162—Bearing supports
-
- 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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
- F01D25/166—Sliding contact bearing
- F01D25/168—Sliding contact bearing for axial load mainly
-
- 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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/18—Lubricating arrangements
- F01D25/183—Sealing means
-
- 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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/18—Lubricating arrangements
- F01D25/183—Sealing means
- F01D25/186—Sealing means for sliding contact bearing
-
- 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
- F02B39/14—Lubrication of pumps; Safety measures therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Supercharger (AREA)
Abstract
The invention discloses a mixed flow turbocharger turbine end sealing structure for a sequential supercharging mode, which improves the sealing performance of a supercharger turbine end and solves the problem of oil leakage of a supercharger in the sequential supercharging process. The lubricating oil backflow bearing comprises a bearing shell, a vortex end bearing seat is fixed in the bearing shell, a supercharger main shaft is arranged in the vortex end bearing seat through a radial bearing, an axial spacing space is reserved between the vortex end bearing seat and the bearing shell, an oil baffle is arranged in the spacing space, an oil baffle hole is formed in the oil baffle, the supercharger main shaft is in clearance fit with the oil baffle hole, the oil baffle is fixed on the vortex end bearing seat through a bolt, an annular boss is arranged on the outer end face of the vortex end bearing seat, an annular groove is formed in the oil baffle, the inner circumferential surface of the annular groove is matched with the outer circumferential surface of the annular boss, a spacing distance is reserved between the top surface of the annular boss and the groove bottom of the annular groove, a lubricating oil leakage space is formed, a first oil return groove is formed in the.
Description
Technical Field
The invention relates to the technical field of turbochargers, in particular to a vortex end sealing structure of a mixed flow turbocharger for a sequential supercharging mode.
Background
The turbocharger is widely applied to the diesel engine, can improve the heat efficiency and the power density of the diesel engine and reduce the emission, and becomes one of key matching parts of the diesel engine. In the operation process, high-temperature and high-pressure waste gas is generated by combustion of a diesel engine cylinder, the waste gas passes through a supercharger waste gas turbine, the energy of the waste gas drives the turbine to rotate at a high speed and output shaft work, a compressor is driven to rotate to do work through a turbine main shaft, the air density is compressed and improved, and compressed air enters the cylinder after being cooled through an intercooler to participate in diesel oil combustion of the cylinder. Generally, more than 1 supercharger is used in a diesel engine, under the rated working condition of the diesel engine, the energy of the exhaust gas of the diesel engine is sufficient, the supercharging pressure of the supercharger is higher, and the use requirement of the diesel engine is met; when the diesel engine is partially loaded, the energy of the exhaust gas of the diesel engine is low, the supercharging pressure of the supercharger is low, the requirement of the diesel engine cannot be met, and the performance of the diesel engine is poor. In order to optimize the diesel part load performance, the use of sequential Supercharging (STC) is an effective means.
The premise of using the sequential supercharging mode is that the diesel engine uses more than 2 superchargers, and all the superchargers of the diesel engine work normally under the rated working condition of the diesel engine. At part load, some of the superchargers are turned off to ensure higher boost pressure and air flow. At this time, the closed supercharger is in a stall state, but the oil is normally supplied to prevent the supercharger from being burned out when suddenly started. Because the conventional supercharger mainly depends on the rotation sealing of the main shaft, when a sequential supercharging mode is adopted, the sealing fails when the main shaft of the supercharger stops, and the problem of oil leakage at the vortex end of the supercharger is solved.
Therefore, in order to improve the sealing performance of the vortex end of the supercharger and solve the problem of oil leakage of the supercharger in the sequential supercharging process, the design of the vortex end sealing structure of the mixed flow turbocharger is an effective method.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a mixed flow turbocharger turbine end sealing structure for a sequential supercharging mode, so that the sealing performance of a supercharger turbine end is improved, and the problem of oil leakage of a supercharger in the sequential supercharging process is solved.
The purpose of the invention is realized as follows:
a mixed flow turbocharger vortex end sealing structure for sequential supercharging mode comprises a bearing shell, a vortex end bearing seat is fixed in the bearing shell, a supercharger main shaft is supported and arranged in the vortex end bearing seat through a radial bearing, an axial spacing space is reserved between the vortex end bearing seat and the bearing shell, an oil baffle plate is arranged in the spacing space, an oil baffle plate hole is formed in the oil baffle plate, the supercharger main shaft is in clearance fit with the oil baffle plate hole, the inner end face of the oil baffle plate is attached to the outer end face of the vortex end bearing seat to form axial positioning of the oil baffle plate, the oil baffle plate is fixed on the vortex end bearing seat through a bolt, an annular boss is arranged on the outer end face of the vortex end bearing seat and surrounds the supercharger main shaft, an annular groove is arranged on the oil baffle plate and surrounds the supercharger main shaft, the inner peripheral face of the annular groove is matched with the outer peripheral face of the annular boss to form radial positioning of the oil baffle, a spacing distance is reserved between the top surface of the annular boss and the bottom of the annular groove to form a leakage space of lubricating oil, and a first oil return groove is formed in the lower portion of the annular groove and used for returning the leaked lubricating oil to the bearing shell.
Preferably, the vortex end bearing seat is provided with a bearing hole along the axial direction for mounting a radial bearing, the outer end of the vortex end bearing seat is provided with a flange plate for fixedly connecting with the bearing shell,
preferably, the turbine end bearing block is provided with a stepped hole with an increased diameter from outside to inside along the axial direction, the outer section of the stepped hole is the bearing hole, and the lower parts of the rest hole sections of the stepped hole are provided with second oil return grooves for returning lubricating oil to the bearing shell.
Preferably, a third oil return groove is formed in the lower portion of the annular boss, and is used for returning leaked oil to the bearing shell.
Preferably, be equipped with a plurality of bolt holes on the oil baffle for with vortex end bearing housing bolt fastening, a plurality of bolt holes are asymmetric distribution on the oil baffle for guarantee that the direction of first oil return groove is down.
Preferably, the oil baffle adopts milling processing or metal plate stamping processing.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
and an oil baffle plate of a bearing seat at the vortex end is added, so that the sealing performance of the vortex end of the supercharger is improved, and the problem of oil leakage at the vortex end of the supercharger in the sequential supercharging process is solved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of an oil baffle;
FIG. 3 is a schematic view of a turbine tip bearing housing;
FIG. 4 is a three-dimensional schematic of the inventive structure.
Reference numerals
In the drawing, 1 is the booster spindle, 2 is whirlpool end bearing frame, 3 is the oil baffle, 4 is the bearing housing, 5 is journal bearing (slide bearing), 6 is first oil return groove, 7 is the second oil return groove, 8 is the third oil return groove, 9 is the oil baffle hole, 10 is the oil baffle locating surface, 11 is the bolt hole, 12 is the dead eye, 13 is the annular groove, 14 is the annular boss, 15 is whirlpool end bearing frame locating surface.
Detailed Description
Referring to fig. 1, a mixed flow turbocharger vortex end sealing structure for sequential supercharging mode includes a bearing housing 4, a vortex end bearing seat 2 is fixed in the bearing housing 4, a supercharger spindle 1 is supported and arranged in the vortex end bearing seat 2 through a radial bearing 5, an axial spacing space is left between the vortex end bearing seat 2 and the bearing housing 4, an oil baffle plate 3 is arranged in the spacing space, an oil baffle hole is arranged on the oil baffle plate 3, and the supercharger spindle 1 and the oil baffle hole are in clearance fit, in this embodiment, the oil baffle plate and the spindle are in small clearance (0.3-0.5mm) fit to form sealing. The inner end face of the oil baffle 3 is attached to the outer end face of the vortex end bearing seat to form axial positioning of the oil baffle 3, the oil baffle 3 is fixed on the vortex end bearing seat 2 through bolts, an annular boss is arranged on the outer end face of the vortex end bearing seat and surrounds the supercharger spindle 1, an annular groove is arranged on the oil baffle 3 and surrounds the supercharger spindle 1, the inner circumferential surface of the annular groove is matched with the outer circumferential surface of the annular boss to form radial positioning of the oil baffle 3, and after the oil baffle is installed in place, the circumferential position and the radial position of the oil baffle keep high position accuracy and cannot interfere with other parts. And a spacing distance is reserved between the top surface of the annular boss and the bottom of the annular groove to form a leakage space of the lubricating oil, and a first oil return groove is arranged at the lower part of the annular groove and used for returning the leaked lubricating oil to the bearing shell 4.
The vortex end bearing block is provided with a bearing hole along the axial direction and used for installing a radial bearing 5, the outer end of the vortex end bearing block is provided with a flange plate and is used for being fixedly connected with a bearing shell 4, the vortex end bearing block is provided with a stepped hole with the diameter increased from the outside to the inside along the axial direction, the outer side section of the stepped hole is the bearing hole 5, and the lower parts of the rest hole sections of the stepped hole are provided with second oil return grooves and are used for returning lubricating oil to the bearing shell 4. And a third oil return groove is formed in the lower part of the annular boss and used for returning leaked lubricating oil to the bearing shell 4. The first oil return groove and the third oil return groove are correspondingly arranged and communicated with the space in the bearing shell 4 and the leakage space of the lubricating oil,
the first oil return groove and the third oil return groove are manufactured in the following modes:
and the lower part of the oil baffle plate and the lower part of the annular boss are milled along the horizontal direction, and the milling position is higher than the lower end of the bearing hole. Make annular boss, annular boss all form incomplete annular structure, increase oil return performance, form first oil return groove, third oil return groove.
The oil baffle adopts milling processing or metal plate stamping processing. The oil baffle plate is provided with a plurality of bolt holes for being fixed with the vortex end bearing seat 2 through bolts, and the bolt holes are asymmetrically distributed on the oil baffle plate, so that the oil baffle plate has a unique installation angle and is used for ensuring that the first oil return groove faces downwards.
The oil duct that is equipped with to radial bearing 5 oiling on the whirlpool end bearing block, radial bearing 5 is also equipped with the oil duct along radial, be equipped with the dynamic seal between 1 whirlpool end of booster and bearing housing 4, when the booster stops rotating, the normal supply of booster lubricating oil, lubricating oil leaks from whirlpool end bearing block 2 and radial bearing 5, radial bearing 5 and main shaft 1, and basically all lubricating oil is sheltered from by oil baffle 3, and flows into bearing housing 4 from the oil return groove, can not spray to the whirlpool end, prevents to move sealed department and takes place the leakage.
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 (6)
1. The utility model provides a mixed flow turbo charger whirlpool end seal structure for pressure boost mode in succession, includes the bearing housing, the bearing housing internal fixation has whirlpool end bearing frame, it is provided with booster main shaft, its characterized in that to support through radial bearing in the whirlpool end bearing frame: an axial spacing space is reserved between the vortex end bearing seat and the bearing shell, an oil baffle plate is arranged in the spacing space, the oil baffle plate is provided with an oil baffle plate hole, the supercharger main shaft is in clearance fit with the oil baffle plate hole, the inner end surface of the oil baffle plate is attached to the outer end surface of the vortex end bearing seat to form axial positioning of the oil baffle plate, the oil baffle plate is fixed on the vortex end bearing seat through a bolt, an annular boss is arranged on the outer end surface of the vortex end bearing seat around the main shaft of the supercharger, an annular groove is arranged on the oil baffle plate and surrounds the main shaft of the supercharger, the inner circumferential surface of the annular groove is matched with the outer circumferential surface of the annular boss to form radial positioning of the oil baffle plate, a spacing distance is reserved between the top surface of the annular boss and the groove bottom of the annular groove to form a lubricating oil leakage space, and a first oil return groove is formed in the lower part of the annular groove and used for returning leaked lubricating oil to the bearing shell.
2. A mixed flow turbocharger scroll end seal structure for a sequential supercharging mode according to claim 1, wherein: the turbine end bearing block is provided with a bearing hole along the axial direction and used for mounting a radial bearing, and the outer end of the turbine end bearing block is provided with a flange plate and used for being fixedly connected with a bearing shell.
3. A mixed flow turbocharger scroll end seal structure for a sequential supercharging mode according to claim 2, wherein: the vortex end bearing seat is provided with a stepped hole with the diameter increased from outside to inside along the axial direction, the outer side section of the stepped hole is the bearing hole, and the lower parts of the rest hole sections of the stepped hole are provided with second oil return grooves for returning lubricating oil to the bearing shell.
4. A mixed flow turbocharger scroll end seal structure for a sequential supercharging mode according to claim 1, wherein: and a third oil return groove is formed in the lower part of the annular boss and used for returning leaked lubricating oil to the bearing shell.
5. A mixed flow turbocharger scroll end seal structure for a sequential supercharging mode according to claim 1, wherein: the oil baffle plate is provided with a plurality of bolt holes for fixing with a vortex end bearing seat bolt, and the bolt holes are asymmetrically distributed on the oil baffle plate and used for ensuring that the direction of the first oil return groove faces downwards.
6. A mixed flow turbocharger scroll end seal structure for a sequential supercharging mode according to claim 1, wherein: the oil baffle adopts milling processing or metal plate stamping processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010716217.8A CN111663965A (en) | 2020-07-23 | 2020-07-23 | Mixed flow turbocharger vortex end sealing structure for sequential pressurization mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010716217.8A CN111663965A (en) | 2020-07-23 | 2020-07-23 | Mixed flow turbocharger vortex end sealing structure for sequential pressurization mode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111663965A true CN111663965A (en) | 2020-09-15 |
Family
ID=72392563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010716217.8A Pending CN111663965A (en) | 2020-07-23 | 2020-07-23 | Mixed flow turbocharger vortex end sealing structure for sequential pressurization mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111663965A (en) |
-
2020
- 2020-07-23 CN CN202010716217.8A patent/CN111663965A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1625290B1 (en) | Turbocharger system for an internal combustion engine | |
| US5066192A (en) | Oil sealing system for a turbo charger | |
| CN108533387B (en) | Turbocharging device with motor/generator | |
| CN201650444U (en) | Turbocharger | |
| CN212250157U (en) | Mixed flow turbocharger vortex end sealing structure for sequential pressurization mode | |
| CN200949485Y (en) | Improvement of turbocharger structure used in vehicle diesel engine | |
| CN2839564Y (en) | Petrol engine turbocharger | |
| CN111663965A (en) | Mixed flow turbocharger vortex end sealing structure for sequential pressurization mode | |
| CN218376590U (en) | Bearing cooling device of air bearing turbocharger | |
| CN218522723U (en) | Turbocharger of gas dynamic pressure foil bearing | |
| CN107605549B (en) | Mixed ceramic ball bearing turbocharger | |
| CN216894556U (en) | Turbocharger with improved positioning and oil supply assembly | |
| CN214741657U (en) | Lubricating oil connecting structure of supercharger | |
| CN102852976A (en) | Turbocharger oil film suspension sliding bearing | |
| CN114087040A (en) | High-temperature high-pressure high-rotation-speed condensing steam turbine | |
| CN214661568U (en) | Pressure end full floating bearing | |
| CN215334011U (en) | Vortex end semi-floating bearing | |
| CN2517874Y (en) | Vehicle turbosupercharger | |
| CN202756090U (en) | Low-damping diesel engine turbocharger | |
| CN102852630A (en) | Suspension supporting structure of low damping oil of turbocharger | |
| CN202756436U (en) | Turbocharger oil film suspension slide bearing | |
| CN202756088U (en) | Turbocharger low damping oil film suspension support structure | |
| CN2454542Y (en) | Integrated intermedioate casing of waste-gas turbine booster of diesel engine | |
| CN220850163U (en) | Low-noise compressor shell with replaceable air inlet | |
| CN220248201U (en) | Aluminum milling intermediate with fins for turbocharger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |