CN110529503A - A kind of sealing structure for Main Shaft Bearing of Engine lubricating oil - Google Patents
A kind of sealing structure for Main Shaft Bearing of Engine lubricating oil Download PDFInfo
- Publication number
- CN110529503A CN110529503A CN201910714902.4A CN201910714902A CN110529503A CN 110529503 A CN110529503 A CN 110529503A CN 201910714902 A CN201910714902 A CN 201910714902A CN 110529503 A CN110529503 A CN 110529503A
- Authority
- CN
- China
- Prior art keywords
- ring
- sealing
- graphite
- lubricating oil
- sealing structure
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
- F16C33/6659—Details of supply of the liquid to the bearing, e.g. passages or nozzles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
- F16C33/783—Details of the sealing or parts thereof, e.g. geometry, material of the mounting region
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/26—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings
- F16J15/28—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings with sealing rings made of metal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/26—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings
- F16J15/30—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings with sealing rings made of carbon
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Of Bearings (AREA)
- Sealing Devices (AREA)
Abstract
The invention belongs to aircraft engine oil design of Sealing Structure technologies, are related to a kind of sealing structure for Main Shaft Bearing of Engine lubricating oil.The structure is made of axis of rotation the first sealing ring all the same, the second sealing ring, thrust ring, graphite-seal ring；Graphite-seal ring is placed in the cavity that the first sealing ring, the second sealing ring and thrust ring are assembled to form；The sealing structure is arranged between the bushing and rotor journal connecting with bearing block；Thrust ring is on being socketed in rotor journal.Sealing structure proposed by the present invention, structure is simple, and sealing performance is easy to detect easy.It using the radial end face contact type sealing structure of two-way function, obturages that effect is good, can effectively prevent lubricating oil from penetrating into air chamber from the lubricating cavity of bearing；The design of oil film graphite grazing structure can guarantee the oil seal requirement at each flight attitude lower support.
Description
Technical field
The invention belongs to aircraft engine oil design of Sealing Structure technologies, are related to a kind of for engine spindle axis
Hold the sealing structure of lubricating oil.
Background technique
In modern aeroengine, through frequently with end face or radial graphite seal device, by main shaft bearing and lubricant with
The gas circuit of engine is environmentally isolated out, and prevents lubricating oil to gas circuit leakage or gas too much to bearing endoluminal leak, to ensure to send out
Motivation lubricating system works normally.But when engine operation, end face or radial graphite seal device can often be ground because of graphite-seal ring
It damages or is broken and leads to seal failure, so that lubricating oil is revealed, cause lube use rate big, the serious peace that will affect engine
It entirely uses.Therefore, the oil seal demand at aeroplane engine mainshaft bearing, structure is complicated for existing sealing structure, is used
The form that waveform spring, locking plate, graphite-seal ring combine can only realize end face seal；Sealing effect is poor.
Summary of the invention
The purpose of the present invention is: to guarantee that aircraft under various flight attitudes, takes off, climbs and dives, start
The sealing of lubricating cavity at machine bearing, the invention proposes a kind of sealing structures for Main Shaft Bearing of Engine lubricating oil.
The technical solution of the invention is as follows: a kind of sealing structure for Main Shaft Bearing of Engine lubricating oil, the structure by
Axis of rotation the first sealing ring all the same, the second sealing ring, thrust ring, graphite-seal ring composition；Graphite-seal ring is placed in
In the cavity that one sealing ring, the second sealing ring and thrust ring are assembled to form；The lining connecting with bearing block is arranged in the sealing structure
Between set and rotor journal；Thrust ring is on being socketed in rotor journal.After the completion of the design of Sealing Structure, first laboratory into
Row leak check realizes the detection of sealing performance when particular exam by detecting the air leakage rate of sealing structure two sides.
The graphite-seal ring is on the one hand to be easily assembled, with the open type sealing ring of elasticity on the other hand limited
In space, it is adjacent to radial with opposing stationary bushing inner wall surface by the elastic force of itself, to eliminate between part
Radial clearance guarantees the radial seal of lubricating cavity.At the same time, in order to be connected to lubricating oil, graphite-seal ring has been arranged radially more
A through-hole, number of openings are 6, are uniformly distributed.It is also equipped between graphite-seal ring and the first, second sealing loop interface more
A groove, oil lubrication graphite-seal ring discharge side lubricating oil pressure.
The thrust ring is made of stainless steel, and the intermediate region contacted with rotor journal is provided with oil groove, reduces thrust
Friction between ring and shaft, the oil groove can also form oil film, play the role of damping.
First sealing ring, the second sealing ring are all made of stainless steel and are made, and end face is from centre to side at convergent contour
Formula can greatly reduce the weight of sealing structure.The contact plane of two sealing rings carries out surface smoothing processing.
The invention has the advantages that
1. a kind of brand-new design of aeroplane engine mainshaft bearing lubricating oil oil film seal apparatus structure；
2. the radial end face contact type sealing structure of two-way function, it is good to obturage effect, and effectively lubricating oil can be prevented from bearing
Lubricating cavity penetrates into air chamber；
3. the design of oil film graphite grazing structure can guarantee the oil seal requirement at each flight attitude lower support.
Detailed description of the invention
Fig. 1 is present invention sealing schematic diagram；
Fig. 2 is graphite-seal ring structural schematic diagram；
Fig. 3 is the first seal ring structure schematic diagram；
Fig. 4 is the second seal ring structure schematic diagram；
Number explanation: 1- graphite-seal ring, 2- thrust ring, the first sealing ring of 3-, the second sealing ring of 4-, 5- bushing, 6- turn
Son.
Specific embodiment
The present invention is described in further details below.
Referring to attached drawing 1-4, a kind of sealing structure for Main Shaft Bearing of Engine lubricating oil of the present invention, as shown in Figure 1, the knot
Structure is made of axis of rotation the first sealing ring 3 all the same, the second sealing ring 4, thrust ring 2, graphite-seal ring 1；Graphite grazing
Ring 1 is placed in the first sealing ring 3, in the cavity that the second sealing ring 4 is assembled to form with thrust ring 2；The sealing structure setting with axis
Between 6 axle journal of bushing 5 and rotor for holding seat connection；Thrust ring 2 is on being socketed in 6 axle journal of rotor.
The sealing structure is the radial end face contact type sealing structure of two-way function, wherein is used in graphite seal structure
Graphite-seal ring 1 be the open type sealing ring with elasticity, when work can by itself elastic force it is radial with it is relatively quiet
Bushing inner wall surface only is adjacent to, and to eliminate the radial clearance between part, guarantees the radial seal of lubricating cavity.In graphite grazing
The operative end surface of ring；The end face of CONTACT WITH FRICTION when work；It is machined with the hole that can be generated gas film lubrication and carry out gas dynamic balance
And slot, it is influenced caused by frictional heat with reducing friction and reducing.In addition, flatness and thick in the operative end surface of graphite-seal ring
Rugosity requires high, flatness ≯ 0.001, roughness ≯ 0.1, to guarantee the contact area of seal face, and in CONTACT WITH FRICTION
Position ensure that the sealing turned, between stator, to guarantee the leakproofness of lubricating cavity.Its structure is as shown in Figure 2:
On the basis of above-mentioned sealing structure, in the first sealing ring 3, the contact surface of the second sealing ring 4 and graphite-seal ring 1
On, it is machined with hole and the slot that can be generated gas film lubrication and carry out gas dynamic balance, is produced with reducing friction and reducing frictional heat
Raw influence.Its structure is distinguished shown in following Fig. 3, Fig. 4.
2 axial dimension of thrust ring is designed bigger than graphite-seal ring 1, guarantee graphite-seal ring 1 axially be can before
Vibration afterwards.When engine operation, under the action of pressure difference, graphite-seal ring 1 is extrudable to be close to high-speed rotating first sealing
It is squeezed when the end face of ring 3 or reverse differential pressure and is close to 4 end face of the second sealing ring and fits closely, between the axial direction between elimination part
Gap guarantees the sealing of lubricating cavity.
The thrust ring 2 is made of stainless steel, the intermediate region of 6 journal contact of rotor is provided with oil groove, reduction stops
Friction between throw-out collar 1 and shaft, the oil groove can also form oil film, play the role of damping.
First sealing ring 3, the second sealing ring 4 are all made of stainless steel and are made, and end face is from centre to side at converging form.
Contact plane surface carries out fairing processing to reach planarity requirements.
In order to be connected to lubricating oil, graphite-seal ring 1 has been arranged radially multiple through-holes, and number of openings is 6, is uniformly distributed.
Oil lubrication graphite-seal ring 1 discharges side lubricating oil pressure.After the completion of entire design of Sealing Structure, carried out first in laboratory
Leak check realizes the detection of sealing performance when particular exam by detecting the air leakage rate of sealing structure two sides.
Embodiment
This invention is applied on certain model engine.It ensure that not using sealing structure proposed by the present invention
With the sealing of the intracavitary lubricating oil of flight attitude lower support.It is a kind of for Main Shaft Bearing of Engine as shown in Figure 1: that schematic diagram is embodied
The sealing structure of lubricating oil is radial direction, the end surface contact type sealing structure of two-way function.The graphite-seal ring of sealing is mounted in by the
In the cavity that one sealing ring, the second sealing ring, thrust ring are assembled to form, which is arranged in the bushing connecting with bearing block
Between rotor journal；Graphite-seal ring and shaft itself are without direct relative friction.
The working principle of sealing structure proposed by the present invention is: when assembly, successively by the first sealing ring, thrust ring, second
Graphite-seal ring is then packed by the first sealing ring, the second sealing ring, thrust by seal ring set on engine rotor axle journal
In the cavity that ring is assembled to form；The lateral surface of graphite-seal ring exists
When engine operation, graphite-seal ring generates relative friction movement between axial direction and ring, and leans on graphite-seal ring
Pressure difference between the air chamber and lubricating cavity at both ends guarantees fitting closely for axial seal end face；Radially, graphite grazing
Ring is adjacent to radial with opposing stationary bushing inner wall surface by the elastic force of itself, in radial and opposing stationary bushing
Inner wall fitting guarantees fitting closely for seal face by graphite-seal ring periphery and the contact squeeze of bushing inner headed face, thus
Effectively lubricating oil is prevented to penetrate into air chamber from the lubricating cavity of support.
The oil film graphite grazing structure designed herein, tool when this sealing device works on the higher transmission shaft of revolving speed
Have prolonged sealing effect, long service life, lubrication leakage amount is small, or even does not leak completely, especially high temperature, high pressure,
Reliable sealing performance is still ensured that under high speed conditions, is not available for other type seal devices, to reduction engine
Oil consumption rate directly reduce in turn use cost play the role of it is very important.
Claims (10)
1. a kind of sealing structure for Main Shaft Bearing of Engine lubricating oil, it is characterised in that: the structure is all the same by axis of rotation
The first sealing ring, the second sealing ring, thrust ring, graphite-seal ring composition；Graphite-seal ring is placed in the first sealing ring, second close
In the cavity that seal ring and thrust ring are assembled to form；The sealing structure be arranged in the bushing being connect with bearing block and rotor journal it
Between；Thrust ring is on being socketed in rotor journal.
2. a kind of sealing structure for Main Shaft Bearing of Engine lubricating oil according to claim 1, it is characterised in that: described
Graphite-seal ring is the open type graphite-seal ring with elasticity.
3. a kind of sealing structure for Main Shaft Bearing of Engine lubricating oil according to claim 1, it is characterised in that: described
There is certain gap between graphite-seal ring and thrust ring.
4. a kind of sealing structure for Main Shaft Bearing of Engine lubricating oil according to claim 3, it is characterised in that: described
Graphite-seal ring has been arranged radially multiple through-holes.
5. a kind of sealing structure for Main Shaft Bearing of Engine lubricating oil according to any one of claims 1-4, special
Sign is: being provided with multiple grooves on the graphite-seal ring and the first sealing ring and the second sealing loop interface.
6. a kind of sealing structure for Main Shaft Bearing of Engine lubricating oil according to claim 1, it is characterised in that: described
Thrust ring and rotor journal contact portion are provided with oil groove.
7. a kind of sealing structure for Main Shaft Bearing of Engine lubricating oil according to claim 1 or 6, it is characterised in that:
The thrust ring axial dimension is slightly larger than graphite-seal ring, guarantee graphite-seal ring it is axial can front and back vibration.
8. a kind of sealing structure for Main Shaft Bearing of Engine lubricating oil according to claim 1, it is characterised in that: described
Small―gap suture cooperates between first sealing ring, the second sealing ring and the bushing of bearing block connection.
9. a kind of sealing structure for Main Shaft Bearing of Engine lubricating oil according to claim 8, it is characterised in that: described
On the contact surface of first sealing ring, the second sealing ring and graphite-seal ring, it is provided with to generate gas film lubrication and carry out gas force and puts down
The hole of weighing apparatus and slot.
10. according to claim 1, a kind of sealing structure for Main Shaft Bearing of Engine lubricating oil, feature described in 7 or 8 exist
In: first sealing ring, the second sealing ring are made of stainless steel, surface smoothing processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910714902.4A CN110529503A (en) | 2019-08-02 | 2019-08-02 | A kind of sealing structure for Main Shaft Bearing of Engine lubricating oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910714902.4A CN110529503A (en) | 2019-08-02 | 2019-08-02 | A kind of sealing structure for Main Shaft Bearing of Engine lubricating oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110529503A true CN110529503A (en) | 2019-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910714902.4A Pending CN110529503A (en) | 2019-08-02 | 2019-08-02 | A kind of sealing structure for Main Shaft Bearing of Engine lubricating oil |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927631A (en) * | 2020-07-31 | 2020-11-13 | 中国航发贵阳发动机设计研究所 | Graphite sealing device for sealing lubricating oil cavity of aircraft engine |
| CN112081831A (en) * | 2020-09-15 | 2020-12-15 | 中国航发沈阳发动机研究所 | Bearing cooling structure |
| CN112797078A (en) * | 2021-02-05 | 2021-05-14 | 中国航发沈阳发动机研究所 | Bearing seal supporting structure |
| CN113530880A (en) * | 2021-08-09 | 2021-10-22 | 中国科学院工程热物理研究所 | Suspended graphite sealing device used between moving and static structures in impeller machinery |
| CN113551039A (en) * | 2021-08-06 | 2021-10-26 | 中国科学院工程热物理研究所 | Self-adaptive graphite sealing structure for intermediate bearing cavity of aircraft engine |
| CN113653537A (en) * | 2021-09-10 | 2021-11-16 | 中国航发湖南动力机械研究所 | Graphite sealing shell with air guide groove and graphite sealing device |
| CN114215916A (en) * | 2021-11-29 | 2022-03-22 | 中国航发沈阳发动机研究所 | Air film sealing structure for main bearing cavity of aero-engine |
| CN114458454A (en) * | 2021-11-29 | 2022-05-10 | 中国航发沈阳发动机研究所 | Graphite piston ring sealing structure for aircraft engine |
| WO2024066426A1 (en) * | 2022-09-26 | 2024-04-04 | 哈电发电设备国家工程研究中心有限公司 | Oil and gas dual-effect seal structure for gas turbine |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927631A (en) * | 2020-07-31 | 2020-11-13 | 中国航发贵阳发动机设计研究所 | Graphite sealing device for sealing lubricating oil cavity of aircraft engine |
| CN112081831A (en) * | 2020-09-15 | 2020-12-15 | 中国航发沈阳发动机研究所 | Bearing cooling structure |
| CN112797078A (en) * | 2021-02-05 | 2021-05-14 | 中国航发沈阳发动机研究所 | Bearing seal supporting structure |
| CN113551039A (en) * | 2021-08-06 | 2021-10-26 | 中国科学院工程热物理研究所 | Self-adaptive graphite sealing structure for intermediate bearing cavity of aircraft engine |
| CN113530880A (en) * | 2021-08-09 | 2021-10-22 | 中国科学院工程热物理研究所 | Suspended graphite sealing device used between moving and static structures in impeller machinery |
| CN113653537A (en) * | 2021-09-10 | 2021-11-16 | 中国航发湖南动力机械研究所 | Graphite sealing shell with air guide groove and graphite sealing device |
| CN113653537B (en) * | 2021-09-10 | 2023-10-24 | 中国航发湖南动力机械研究所 | Graphite seal shell with air guide groove and graphite seal device |
| CN114215916A (en) * | 2021-11-29 | 2022-03-22 | 中国航发沈阳发动机研究所 | Air film sealing structure for main bearing cavity of aero-engine |
| CN114458454A (en) * | 2021-11-29 | 2022-05-10 | 中国航发沈阳发动机研究所 | Graphite piston ring sealing structure for aircraft engine |
| CN114215916B (en) * | 2021-11-29 | 2024-08-02 | 中国航发沈阳发动机研究所 | A air film seal structure for aeroengine main bearing chamber |
| WO2024066426A1 (en) * | 2022-09-26 | 2024-04-04 | 哈电发电设备国家工程研究中心有限公司 | Oil and gas dual-effect seal structure for gas turbine |
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Application publication date: 20191203 |