CN111663965B - Mixed-flow turbocharger vortex end sealing structure for sequential supercharging mode - Google Patents
Mixed-flow turbocharger vortex end sealing structure for sequential supercharging mode Download PDFInfo
- Publication number
- CN111663965B CN111663965B CN202010716217.8A CN202010716217A CN111663965B CN 111663965 B CN111663965 B CN 111663965B CN 202010716217 A CN202010716217 A CN 202010716217A CN 111663965 B CN111663965 B CN 111663965B
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- China
- Prior art keywords
- oil
- vortex end
- bearing
- oil baffle
- bearing seat
- 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
- 238000007789 sealing Methods 0.000 title abstract description 11
- 239000003921 oil Substances 0.000 claims abstract description 85
- 239000010687 lubricating oil Substances 0.000 claims abstract description 19
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 238000003801 milling Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 6
- 239000002912 waste gas Substances 0.000 description 4
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
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- 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 vortex end sealing structure for a sequential supercharging mode, which improves the sealing performance of a turbocharger vortex end and solves the oil leakage problem of a supercharger in the sequential supercharging process. The 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 interval space is reserved between the vortex end bearing seat and the bearing shell, an oil baffle plate is arranged in the interval 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 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, an annular groove is formed in the oil baffle plate, the inner peripheral face of the annular groove is matched with the outer peripheral face of the annular boss, an interval distance is reserved between the top face of the annular boss and the bottom of the annular groove, a leakage space of lubricating oil is formed, 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.
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 thermal efficiency and the power density of the diesel engine, reduces the emission, and becomes one of key fittings of the diesel engine. In the running process, the diesel engine cylinder burns to generate high-temperature high-pressure waste gas, the waste gas energy drives the turbine to rotate at a high speed and output shaft work through the supercharger waste gas turbine, the compressor is driven to rotate to do work through the turbine main shaft, the air density is compressed and improved, and compressed air enters the cylinder after being cooled through the intercooler to participate in diesel oil combustion of the cylinder. Usually, more than 1 supercharger is used by the diesel engine, under the rated working condition of the diesel engine, the energy of the waste 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 diesel engine exhaust 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. To optimize the part load performance of a diesel engine, the sequential Supercharging (STC) approach is an effective approach.
The precondition of using the sequential supercharging mode is that the diesel engine uses more than 2 superchargers, and under the rated working condition of the diesel engine, all superchargers of the diesel engine work normally. At part load, part of the booster is turned off to ensure higher boost pressure and air flow. At this time, the closed supercharger is in a stalling state, but the lubricating oil is normally supplied, so that the supercharger is prevented from being burned when suddenly started. Because the conventional supercharger mainly relies on the main shaft to rotate and seal, when a sequential supercharging mode is adopted, the seal fails when the main shaft of the supercharger stops rotating, and the vortex end of the supercharger generates the oil leakage problem.
Therefore, in order to improve the sealing performance of the vortex end of the supercharger and solve the oil leakage problem 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, provides a vortex end sealing structure of a mixed-flow turbocharger in a sequential supercharging mode, improves the sealing performance of the vortex end of the turbocharger, and solves the oil leakage problem of the turbocharger in the sequential supercharging process.
The purpose of the invention is realized in the following way:
The utility model provides a mixed flow turbocharger vortex end seal structure for sequential pressurization mode, includes the bearing shell, the bearing shell internal fixation has vortex end bearing frame, be provided with the booster main shaft through radial bearing support in the vortex end bearing frame, leave axial interval space between vortex end bearing frame and the bearing shell, be equipped with the oil baffle in this interval space, be equipped with the oil baffle hole on the oil baffle, booster main shaft and oil baffle hole clearance fit, the inner terminal surface of oil baffle is laminated with the outer terminal surface of vortex end bearing frame, forms the axial positioning to the oil baffle, the oil baffle passes through the bolt fastening on the vortex end bearing frame, is equipped with annular boss around the booster main shaft on the outer terminal surface of vortex end bearing frame, be equipped with annular groove around the booster main shaft on the oil baffle, the inner peripheral surface of annular groove cooperates with the outer peripheral surface of annular boss, forms the radial positioning to the oil baffle, leaves the interval distance between the top surface of annular boss and the tank bottom of annular groove, forms the leakage space of lubricating oil, the lower part of annular groove is equipped with first oil return groove for with the bearing shell that leaks.
Preferably, the bearing seat of the vortex end is provided with a bearing hole along the axial direction for installing a radial bearing, the outer end of the bearing seat of the vortex end is provided with a flange plate for fixedly connecting with a bearing shell,
Preferably, the bearing seat of the vortex end is provided with a stepped hole with an increased diameter 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 a second oil return groove for returning lubricating oil to the bearing shell.
Preferably, a third oil return groove is arranged at the lower part of the annular boss and used for returning leaked lubricating oil to the bearing shell.
Preferably, the oil baffle is provided with a plurality of bolt holes for being fixed with the bearing seat bolts at the vortex end, and the plurality of bolt holes are asymmetrically distributed on the oil baffle and used for ensuring that the direction of the first oil return groove is downward.
Preferably, the oil baffle plate is processed by milling or sheet metal stamping.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
The oil baffle of the 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 diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the structure of an oil baffle;
FIG. 3 is a schematic view of a tip bearing;
FIG. 4 is a three-dimensional schematic of the structure of the present invention.
Reference numerals
In the drawing, 1 is a supercharger main shaft, 2 is a vortex end bearing seat, 3 is an oil baffle, 4 is a bearing shell, 5 is a radial bearing (sliding bearing), 6 is a first oil return groove, 7 is a second oil return groove, 8 is a third oil return groove, 9 is an oil baffle hole, 10 is an oil baffle locating surface, 11 is a bolt hole, 12 is a bearing hole, 13 is an annular groove, 14 is an annular boss, and 15 is a vortex end bearing seat locating surface.
Detailed Description
Referring to fig. 1, a vortex end sealing structure of a mixed-flow turbocharger in a sequential pressurizing mode comprises a bearing shell 4, a vortex end bearing seat 2 is fixed in the bearing shell 4, a supercharger main shaft 1 is supported and arranged in the vortex end bearing seat 2 through a radial bearing 5, an axial interval space is reserved between the vortex end bearing seat 2 and the bearing shell 4, an oil baffle plate 3 is arranged in the interval space, an oil baffle plate hole is formed in the oil baffle plate 3, and the supercharger main shaft 1 is in clearance fit with the oil baffle plate hole, and in the embodiment, the oil baffle plate and a main shaft small clearance (0.3-0.5 mm) are matched to form a seal. 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 around the supercharger spindle 1, an annular groove is arranged on the oil baffle 3 around the supercharger spindle 1, 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 3, and after the oil baffle is installed in place, the circumferential position and the radial position of the oil baffle keep higher position accuracy and cannot interfere with other parts. The top surface of the annular boss and the bottom of the annular groove are separated by a distance 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 bearing pedestal of the vortex end is axially provided with a bearing hole for installing a radial bearing 5, the outer end of the bearing pedestal of the vortex end is provided with a flange plate for being fixedly connected with a bearing shell 4, the bearing pedestal of the vortex end is axially provided with a stepped hole with the diameter increased from outside to inside, the outer 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 a second oil return groove for returning lubricating oil to the bearing shell 4. The lower part of the annular boss is provided with a third oil return groove 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 are communicated with the space in the bearing shell 4 and the leakage space of the lubricating oil,
The manufacturing modes of the first oil return groove and the third oil return groove are as follows:
The lower parts of the oil baffle plate and the annular boss are milled along the horizontal direction, and the milling position is higher than the lower end of the bearing hole. The annular boss and the annular boss form incomplete annular structures, oil return performance is improved, and a first oil return groove and a third oil return groove are formed.
The oil baffle is processed by milling or stamping by sheet metal. Be equipped with a plurality of bolt holes on the oil baffle for with vortex end bearing seat 2 bolt fastening, a plurality of bolt holes are asymmetric distribution on the oil baffle, make the oil baffle have unique installation angle, are used for guaranteeing that the direction of first oil return groove is down.
The bearing seat of the vortex end is provided with an oil duct for injecting oil into the radial bearing 5, the radial bearing 5 is also provided with an oil duct along the radial direction, a dynamic seal is arranged between the vortex end of the main shaft 1 of the supercharger and the bearing shell 4, when the supercharger stops running, the lubricating oil of the supercharger is normally supplied, the lubricating oil leaks from the bearing seat 2 of the vortex end, the radial bearing 5 and the main shaft 1, and basically all the lubricating oil is blocked by the oil baffle 3 and flows into the bearing shell 4 from an oil return groove, so that the lubricating oil cannot be injected to the vortex end, and the leakage of the dynamic seal is prevented.
Finally, it is noted that the above-mentioned preferred embodiments are only intended to illustrate rather than limit the invention, and that, although the invention has been described in detail by means of the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (3)
1. The utility model provides a mixed flow turbocharger vortex end seal structure for following pressurization mode, includes the bearing shell, the bearing shell internal fixation has vortex end bearing frame, be provided with the booster main shaft through radial bearing support in the vortex end bearing frame, its characterized in that: an axial interval space is reserved between the vortex end bearing seat and the bearing shell, an oil baffle is arranged in the interval space, an oil baffle hole is formed in the oil baffle, a main shaft of the supercharger is in clearance fit with the oil baffle hole, the inner end face of the oil baffle is attached to the outer end face of the vortex end bearing seat to form axial positioning of the oil baffle, the oil baffle is fixed on the vortex end bearing seat through bolts, an annular boss is arranged on the outer end face of the vortex end bearing seat around the main shaft of the supercharger, an annular groove is arranged on the oil baffle around the main shaft of the supercharger, 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, an interval distance is reserved between the top face 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 arranged at the lower part of the annular groove and used for returning the leaked lubricating oil to the bearing shell;
The bearing seat of the vortex end is axially provided with a bearing hole for installing a radial bearing, and the outer end of the bearing seat of the vortex end is provided with a flange plate for fixedly connecting with a bearing shell;
the bearing seat of the vortex end is axially provided with a stepped hole with an increased diameter from outside to inside, 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;
be equipped with a plurality of bolt holes on the oil baffle for with vortex end bearing seat 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.
2. The mixed flow turbocharger tip seal structure for sequential supercharging according to claim 1, wherein: and a third oil return groove is arranged at the lower part of the annular boss and used for returning leaked lubricating oil to the bearing shell.
3. The mixed flow turbocharger tip seal structure for sequential supercharging according to claim 1, wherein: the oil baffle is processed by milling or stamping by sheet metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010716217.8A CN111663965B (en) | 2020-07-23 | 2020-07-23 | Mixed-flow turbocharger vortex end sealing structure for sequential supercharging mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010716217.8A CN111663965B (en) | 2020-07-23 | 2020-07-23 | Mixed-flow turbocharger vortex end sealing structure for sequential supercharging mode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111663965A CN111663965A (en) | 2020-09-15 |
| CN111663965B true CN111663965B (en) | 2024-09-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010716217.8A Active CN111663965B (en) | 2020-07-23 | 2020-07-23 | Mixed-flow turbocharger vortex end sealing structure for sequential supercharging mode |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212250157U (en) * | 2020-07-23 | 2020-12-29 | 重庆江增船舶重工有限公司 | Mixed flow turbocharger vortex end sealing structure for sequential pressurization mode |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0218092D0 (en) * | 2002-08-03 | 2002-09-11 | Holset Engineering Co | Turbocharger |
| GB0623705D0 (en) * | 2006-11-28 | 2007-01-10 | Cummins Turbo Tech Ltd | Hydraulic for a turbocharger |
| CN201627605U (en) * | 2010-01-21 | 2010-11-10 | 重庆德蚨乐机械制造有限公司 | Sealing and heat insulation structure at vortex end of turbocharger |
| CN104454150A (en) * | 2014-12-04 | 2015-03-25 | 湖南天雁机械有限责任公司 | Turbocharger gas compressor sealing structure |
| JP6242833B2 (en) * | 2015-03-23 | 2017-12-06 | 三菱重工業株式会社 | Exhaust turbine turbocharger |
| CN204804886U (en) * | 2015-06-25 | 2015-11-25 | 重庆德蚨乐机械制造有限公司 | Turbocharger |
| CN107605549B (en) * | 2017-10-26 | 2024-03-08 | 凤城市时代龙增压器制造有限公司 | Mixed ceramic ball bearing turbocharger |
| CN109404060B (en) * | 2018-12-10 | 2024-02-02 | 重庆江增船舶重工有限公司 | Variable geometry mixed flow turbocharger sealing structure |
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2020
- 2020-07-23 CN CN202010716217.8A patent/CN111663965B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212250157U (en) * | 2020-07-23 | 2020-12-29 | 重庆江增船舶重工有限公司 | Mixed flow turbocharger vortex end sealing structure for sequential pressurization mode |
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| CN111663965A (en) | 2020-09-15 |
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