CN108131399A - A kind of engine shaft bearing cooling structure - Google Patents
A kind of engine shaft bearing cooling structure Download PDFInfo
- Publication number
- CN108131399A CN108131399A CN201711158797.8A CN201711158797A CN108131399A CN 108131399 A CN108131399 A CN 108131399A CN 201711158797 A CN201711158797 A CN 201711158797A CN 108131399 A CN108131399 A CN 108131399A
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- Prior art keywords
- partition
- internal
- channel
- engine
- cooling structure
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Classifications
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- 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
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/12—Cooling of plants
- F02C7/16—Cooling of plants characterised by cooling medium
- F02C7/18—Cooling of plants characterised by cooling medium the medium being gaseous, e.g. air
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to a kind of engine shaft bearing cooling structures, belong to engine art.Engine shaft bearing cooling scheme proposed by the present invention has preferable cooling effect for the bearing block at engine thermal end pieces; by the thermal force for reducing bearing block; reduce the bear vibration in bearing block inner cavity in engine working process; the purpose of protection bearing is played, improves engine job stability, the service life for extending bearing.
Description
Technical field
The present invention relates to technical field of engines, and in particular to a kind of engine shaft bearing cooling structure.
Background technology
The fulcrum of all rotors is bearing in engine, and all load of engine are all by bearing load, and bearing block is
The bearing of bearing and stress point undertake the loading force from bearing in engine working process.Bearing block structure is usually compact,
So to work when stability requirement it is higher.In engine working process, in addition to the cooling effect of bearing to be ensured, bearing
Seat also needs enough cooling effects, otherwise easily causes the problems such as bearing working is unstable, vibration is big, bearing wear, and then
It influences engine behavior and even damages engine.Therefore in the design structure of engine, spininess designs bearing block special
Cooling structure, especially hot junction bearing block cooling structure.
As shown in Figure 1, the bearing block cooling structure form at the engine thermal end pieces of existing conventional design is double-layer structure,
It is made of partition board 2 and shell 3, forms internal channel 5 and outer tunnel 6, be normally at the lower section of combustion chamber 4, drawn from the outlet of compressor 1
But gas cools down the bearing block 7 of 8 top of bearing to conduction cooling.
Since the air-flow for being directed to bearing block cooling all is from blower outlet, temperature is higher, therefore works in engine
In the process, it is poor to the cooling effect of bearing block, especially after engine speed reaches working speed, indoor combustion zone of burning
A large amount of thermal energy are radiated to burner inner liner, thermal energy quickly heated the cooling gas for flowing through burner inner liner, gas temperature caused to steeply rise,
Such gas stream easily leads to bearing block structure deformation, becomes large-sized through bearing block.When the gap between bearing block and bearing becomes
During the distortion variation of big and contact surface, vibration values increase therewith at this；Bearing block overheats, and also results in the lubricating oil cooling at bearing
Decreased effectiveness, after multiple heat run, bearing wear is serious, so as to need often to reprocess or replace bearing block.
Invention content
(1) technical problems to be solved
The technical problem to be solved by the present invention is to：How preferable cooling is played for the bearing block at engine thermal end pieces
The engine shaft bearing cooling structure of effect.
(2) technical solution
In order to solve the above technical problem, the present invention provides a kind of engine shaft bearing cooling structure, which is three
Layer cyclic structure, including support plate 11, external partition 12, middle partition board 13, internal partition 14 and bearing 20；The internal partition 14, middle partition board
13 and external partition 12 these three partition boards internal channel 18, middle channel 17, outer tunnel 16 totally three layers of channel are formed in engine, it is interior logical
Road 18 is between internal partition 14 and combustion chamber 15, and middle channel 17 is between internal partition 14 and middle partition board 13, outer tunnel 16
Between middle partition board 13 and external partition 12, top, middle part and the root of this three layers of channel difference unicom bearing blocks 21, and with starting
Machine is coaxial, positioned at the lower section of combustion chamber 15；Bearing block 21 is located at the top of bearing 20；What outer tunnel 16 and middle channel 17 connected is
The intergrade of compressor 10, the wheel hub of the intergrade are equipped with bleed hole 9, the branch positioned at 17 front end of outer tunnel 16 and middle channel
Plate 11 connects internal partition 14, middle partition board 13 and external partition 12 respectively；What the internal channel 18 connected is the outlet of compressor 10, institute
It states channel 17 and passes through circumferentially uniformly distributed 19 unicom of hole on internal partition 14 with internal channel 18；The internal partition 14 and middle partition board 13
It is raised to 15 direction of combustion chamber in the position close to 21 pre-determined distance of bearing block.
Preferably, the material of the internal partition 14, middle partition board 13 and external partition 12 be 1Cr11Ni2W2MoV, thickness 1mm
Plank.
Preferably, the internal partition 14, middle partition board 13 and external partition 12 all in a manner of electron beam welding one end with calming the anger
Machine 10 connects, and other end is connect with bearing block 21.
Preferably, between 12 3 internal partition 14, middle partition board 13 and external partition partition boards mutual normal direction spacing
For 5mm ± 1mm, the distance of the normal direction between internal partition 14 and combustion chamber 15 is 30mm ± 1mm.
Preferably, totally 32, the bleed hole 9, aperture are Φ 3.
Preferably, 11 material of support plate is 1Cr11Ni2W2MoV, and quantity is evenly distributed with 8 to be circumferential, and axial length is
10mm, width 4mm, in oblong.
Preferably, 11 head of support plate and tail portion are handled with arc transition.
Preferably, hole 19 circumferentially uniformly distributed on the internal partition 14 is 36, and aperture is Φ 10.
Preferably, the radius of 13 protrusion of the middle partition board is twice of the radius of 14 protrusion of internal partition.
(3) advantageous effect
The present invention proposes a kind of engine shaft bearing cooling structure and cooling means, and the program is for engine thermal end
Bearing block at part has preferable cooling effect, by reducing the thermal force of bearing block, makes to be in engine working process
The bear vibration of bearing block inner cavity reduces, and plays the purpose of protection bearing, improves engine job stability, extends making for bearing
Use the service life.Experiments have shown that engine shaft bearing cooling structure provided by the invention is compared to existing conventional cooling structure, cooling effect
Fruit can promote 10%-30%；Oil temperature can reduce by 10 DEG C -20 DEG C at bearing；In engine working process, vibration it is comprehensive
2g-5g can be reduced by closing virtual value；Bearing life can improve 10%-20%.
Description of the drawings
Fig. 1 is the engine shaft bearing cooling structure form structure schematic diagram of conventional design；
Fig. 2 is engine shaft bearing cooling structure schematic diagram provided by the invention.
Specific embodiment
To make the purpose of the present invention, content and advantage clearer, with reference to the accompanying drawings and examples, to the present invention's
Specific embodiment is described in further detail.
The present invention proposes a kind of structure has preferable cooling effect for the bearing block at engine thermal end pieces,
By reducing the thermal force of bearing block, reduce the bear vibration in bearing block inner cavity in engine working process, play guarantor
The purpose of bearing is protected, improves engine job stability, the service life for extending bearing.
Engine shaft bearing cooling structure provided by the invention is shellring shape structure, which is shellring shape structure,
Including support plate 11, external partition 12, middle partition board 13, internal partition 14 and bearing 20, three partition boards formed in engine internal channel 18,
Middle channel 17, outer tunnel 16 totally three layers of channel, between internal partition 14 and combustion chamber 15, middle channel 17 is located at interior internal channel 18
Between partition board 14 and middle partition board 13, outer tunnel 16 is between middle partition board 13 and external partition 12；This three layers of channel difference unicom axis
Top, middle part and the root of bearing 21, and it is coaxial with engine, positioned at the lower section of combustion chamber 15.Bearing block 21 is in bearing 20
Top.What outer tunnel 16 and middle channel 17 connected is the intergrade of compressor 10, and the wheel hub of intergrade has bleed hole 9, is located at
The support plate 11 of 17 front end of outer tunnel 16 and middle channel is connected to internal partition 14, middle partition board 13 and external partition 12 respectively；Internal channel 18
What is connected is the outlet of compressor 10, and middle channel 17 passes through circumferentially uniformly distributed 19 unicom of hole on internal partition 14 with internal channel 18；
Internal partition 14 and middle partition board 13 are raised to 15 direction of combustion chamber in the position close to bearing block 21.
The method that engine shaft bearing cooling is carried out using the structure, is included the following steps：
When engine enters working condition, engine shaft bearing cooling structure provided by the invention is respectively from compressor 10
Middle part and exit bleed.Cooling gas flows out, then from bleed hole 9 of the intergrade through wheel hub of compressor 10 through support plate 11 all the way
After respectively enter outer tunnel 16 and middle channel 17, into outer tunnel 16 cooling gas be directly entered bearing block 21 root carry out it is cold
But, in addition to the cooling gas of channel 17 is cooled down except the middle part for entering bearing block 21 in, also pass through hole 19 and internal channel 18
The cooling gas in addition exported all the way from compressor 10 carry out heat exchange, due to coming from 10 intergrade of compressor in middle channel 17
Cooling temperature degree less than the cooling temperature degree exported in internal channel 18 from compressor 10, therefore by heat exchange can reduce come
The influence of the cooling gas of the heat radiation inward passage 18 of spontaneous combustion room 15, lowers the gas flow temperature in internal channel 18, so as to improve
The air-flow of internal channel 18 is to the cooling effect at 21 top of bearing block.The tail end of internal partition 14 and middle partition board 13 is to 15 direction of combustion chamber
Protrusion, it is therefore an objective to which hot extrusion produced by the temperature difference of 13 liang of sidewinds of internal partition 14 and middle partition board is offset in the thermal expansion of balancing axial
Compression, so as to improve the stability of cooling structure provided by the invention and safety.
It is illustrated below.
Bearing block cooling structure in certain engine is shellring shape structure, by internal partition 14, middle partition board 13 and external partition
12 are formed, and internal channel 18, middle channel 17, outer tunnel 16 totally three layers of channel are formed in engine, this three layers of channel difference unicom
Top, middle part and the root of bearing block 21, and it is coaxial with engine, positioned at the lower section of combustion chamber 15.Internal partition 14, middle partition board 13
The plank that material with external partition 12 is 1Cr11Ni2W2MoV, thickness is 1mm, one end and pressure all in a manner of electron beam welding
Mechanism of qi 10 connects, and other end is connect with bearing block 21.The spacing of mutual normal direction is 5mm ± 1mm between three partition boards, interior
The distance of normal direction between partition board 14 and combustion chamber 15 is 30mm ± 1mm.What outer tunnel 16 and middle channel 17 connected is to calm the anger
The intergrade of machine 10, the wheel hub of intergrade have the consistent bleed hole 9 of circumferentially uniformly distributed size, and totally 32, bleed hole 9, aperture is
Φ3mm.Support plate 11 positioned at outer tunnel 16 and the front end of middle channel 17 is connected to internal partition 14, interval by way of electron beam weldering
Plate 13 and external partition 12.11 material of support plate is 1Cr11Ni2W2MoV, and quantity is evenly distributed with 8 to be circumferential, axial length 10mm, width
4mm, in oblong, 11 head of support plate and tail portion 2 transition processing of circular arc R.What internal channel 18 connected is going out for compressor 10
Mouthful；For middle channel 17 with internal channel 18 by 36 circumferentially uniformly distributed 19 unicom of hole, aperture is Φ 10；Internal partition 14 and middle partition board
13 is raised to 15 direction of combustion chamber in the position close to bearing block 21, and the radius of 14 protrusion of internal partition is R10, middle 13 protrusion of partition board
Radius be R20.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformation can also be made, these are improved and deformation
Also it should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of engine shaft bearing cooling structure, which is characterized in that the structure be shellring shape structure, including support plate (11),
External partition (12), middle partition board (13), internal partition (14) and bearing (20)；The internal partition (14), middle partition board (13 and external partition
(12) these three partition boards form internal channel (18), middle channel (17), outer tunnel (16) totally three layers of channel, internal channel in engine
(18) between internal partition (14) and combustion chamber (15), middle channel (17) between internal partition (14) and middle partition board (13),
Outer tunnel (16) between middle partition board (13) and external partition (12), internal channel (18), middle channel (17), outer tunnel (16) this three
Top, middle part and the root of layer channel difference unicom bearing block (21), and it is coaxial with engine, under combustion chamber (15)
Side；Bearing block (21) is positioned at the top of bearing (20)；What outer tunnel (16) and middle channel (17) connected is in compressor (10)
Intercaste, the wheel hub of the intergrade are equipped with bleed hole (9), the support plate (11) positioned at outer tunnel (16) and middle channel (17) front end
Connection internal partition (14), middle partition board (13) and external partition (12) respectively；Internal channel (18) connection is compressor (10)
Outlet, the middle channel (17) pass through circumferentially uniformly distributed hole (19) unicom on internal partition (14) with internal channel (18)；In described
Partition board (14) and middle partition board (13) are raised to combustion chamber (15) direction in the position close to bearing block (21) pre-determined distance.
2. engine shaft bearing cooling structure as described in claim 1, which is characterized in that the internal partition (14), middle partition board
(13) and the material of external partition (12) be 1Cr11Ni2W2MoV, the plank that thickness is 1mm.
3. engine shaft bearing cooling structure as described in claim 1, which is characterized in that the internal partition (14), middle partition board
(13) it is connect with external partition (12) one end all in a manner of electron beam welding with compressor (10), other end and bearing block (21)
Connection.
4. engine shaft bearing cooling structure as described in claim 1, which is characterized in that the internal partition (14), middle partition board
(13) spacing of mutual normal direction is 5mm ± 1mm, internal partition (14) and combustion chamber between (12) three partition boards of external partition
(15) distance of the normal direction between is 30mm ± 1mm.
5. engine shaft bearing cooling structure as described in claim 1, which is characterized in that the bleed hole (9) totally 32, hole
Diameter is Φ 3.
6. engine shaft bearing cooling structure as described in claim 1, which is characterized in that support plate (11) material is
1Cr11Ni2W2MoV, quantity are evenly distributed with 8 to be circumferential, axial length 10mm, width 4mm, in oblong.
7. engine shaft bearing cooling structure as described in claim 1, which is characterized in that support plate (11) head and tail portion
It is handled with arc transition.
8. engine shaft bearing cooling structure as described in claim 1, which is characterized in that circumferential on the internal partition (14)
Uniformly distributed hole (19) is 36, and aperture is Φ 10.
9. engine shaft bearing cooling structure as described in claim 1, which is characterized in that the half of middle partition board (13) protrusion
Diameter is twice of the radius of internal partition (14) protrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711158797.8A CN108131399B (en) | 2017-11-20 | 2017-11-20 | A kind of engine bearing seat cooling structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711158797.8A CN108131399B (en) | 2017-11-20 | 2017-11-20 | A kind of engine bearing seat cooling structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108131399A true CN108131399A (en) | 2018-06-08 |
| CN108131399B CN108131399B (en) | 2019-06-28 |
Family
ID=62389802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711158797.8A Active CN108131399B (en) | 2017-11-20 | 2017-11-20 | A kind of engine bearing seat cooling structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN108131399B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB609338A (en) * | 1946-03-11 | 1948-09-29 | Robert Clarkson Plumb | Improvements in or relating to means for removing dirt or solid particles from a fluid |
| CH263759A (en) * | 1946-03-25 | 1949-09-15 | Rolls Royce | Combustion turbine plant with cooling device. |
| GB642506A (en) * | 1948-09-15 | 1950-09-06 | Havilland Engine Co Ltd | Improvements in or relating to gas turbines |
| CN1828140A (en) * | 2005-03-02 | 2006-09-06 | 通用电气公司 | One-piece can combustor |
| US20140060075A1 (en) * | 2012-01-31 | 2014-03-06 | United Technologies Corporation | Gas turbine engine buffer system |
| CN104169649A (en) * | 2012-03-16 | 2014-11-26 | 西门子公司 | Annular combustion chamber bypass |
| CN104296160A (en) * | 2014-09-22 | 2015-01-21 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Flow guide bush of combustion chamber of combustion gas turbine and with cooling function |
| CN104819016A (en) * | 2015-05-05 | 2015-08-05 | 中国航空动力机械研究所 | Turbine rear support bearing seat, cooling method and turbine fan engine |
| CN104930544A (en) * | 2014-03-18 | 2015-09-23 | 阿尔斯通技术有限公司 | Combustion chamber with cooling sleeve |
| EP2927426A1 (en) * | 2014-04-03 | 2015-10-07 | United Technologies Corporation | Cooling system with a bearing compartment bypass |
-
2017
- 2017-11-20 CN CN201711158797.8A patent/CN108131399B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB609338A (en) * | 1946-03-11 | 1948-09-29 | Robert Clarkson Plumb | Improvements in or relating to means for removing dirt or solid particles from a fluid |
| CH263759A (en) * | 1946-03-25 | 1949-09-15 | Rolls Royce | Combustion turbine plant with cooling device. |
| GB642506A (en) * | 1948-09-15 | 1950-09-06 | Havilland Engine Co Ltd | Improvements in or relating to gas turbines |
| CN1828140A (en) * | 2005-03-02 | 2006-09-06 | 通用电气公司 | One-piece can combustor |
| US20140060075A1 (en) * | 2012-01-31 | 2014-03-06 | United Technologies Corporation | Gas turbine engine buffer system |
| CN104169649A (en) * | 2012-03-16 | 2014-11-26 | 西门子公司 | Annular combustion chamber bypass |
| CN104930544A (en) * | 2014-03-18 | 2015-09-23 | 阿尔斯通技术有限公司 | Combustion chamber with cooling sleeve |
| EP2927426A1 (en) * | 2014-04-03 | 2015-10-07 | United Technologies Corporation | Cooling system with a bearing compartment bypass |
| CN104296160A (en) * | 2014-09-22 | 2015-01-21 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Flow guide bush of combustion chamber of combustion gas turbine and with cooling function |
| CN104819016A (en) * | 2015-05-05 | 2015-08-05 | 中国航空动力机械研究所 | Turbine rear support bearing seat, cooling method and turbine fan engine |
| CN104819016B (en) * | 2015-05-05 | 2016-09-21 | 中国航空动力机械研究所 | Turbine rear trunnion bearing, cooling means and turbofan |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108131399B (en) | 2019-06-28 |
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