CN104141775B - For deaerator and the aeroengine of power plant gear-box - Google Patents
For deaerator and the aeroengine of power plant gear-box Download PDFInfo
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- CN104141775B CN104141775B CN201410314605.8A CN201410314605A CN104141775B CN 104141775 B CN104141775 B CN 104141775B CN 201410314605 A CN201410314605 A CN 201410314605A CN 104141775 B CN104141775 B CN 104141775B
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- cover
- gas mixture
- connecting bushing
- wall body
- deaerator
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- 239000000203 mixture Substances 0.000 claims abstract description 86
- 230000008676 import Effects 0.000 claims abstract description 58
- 238000000926 separation method Methods 0.000 claims abstract description 56
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 4
- 239000003921 oil Substances 0.000 claims description 61
- 239000010687 lubricating oil Substances 0.000 claims description 30
- 230000000694 effects Effects 0.000 description 12
- 238000005119 centrifugation Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006557 surface reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B5/00—Other centrifuges
Abstract
The invention discloses a kind of deaerator for power plant gear-box and aeroengine.Deaerator for power plant gear-box comprises separator cover and cyclone cover; The shaft core position of separator cover is provided with connecting bushing, and cyclone cover is sealed on semiclosed cavity that separator cover and connecting bushing enclose formation and forms gas mixture separation cavity; Cyclone cover on the wall body near connecting bushing or separator cover near connecting bushing wall body on offer at least one gas mixture import, the wall body relative with wall body residing for gas mixture import offers at least one relief opening, and relief opening is arranged near connecting bushing; The wall of connecting bushing is provided with arranges separation dividing plate in gas mixture separation cavity, is separated between dividing plate and separator cover and leaves spacing; Separator cover offers at least one oil outlet, separation separator face is in same plane to the one side of gas mixture import with oil outlet.Do not interfere with each other between each import and export.
Description
Technical field
The present invention relates to aeroengine field, especially, relate to a kind of deaerator for power plant gear-box.In addition, the invention still further relates to a kind of aeroengine comprising above-mentioned deaerator.
Background technique
When lubricating oil is by oil pump, oil circuit and high rotating speed bearing, a large amount of dissociated airs is brought in lubricating oil, thus reduce the cooling capacity of lubricating oil, increase the oil flow resistance in oil circuit, for work that can be safe and reliable with the pressure balance outside chamber and whole gear-box oil system in guarantee gear-box chamber, need to utilize gas and oil separating plant the gas separaion in lubricating oil out.In addition, discharging and atmosphere pollution with gas for reducing lubricating oil consumption and lubricating oil, needing the lubricating oil in separation oil and gas mixture as much as possible.
The deaerator that current Aero-Engine Lubrication System adopts mainly contains centrifugal Oil-gas Separation, dynamic pressure type deaerator peace plate-type oil gas separating device.
Flat deaerator is that when utilizing lubricating oil to flow through flat board or hole formula filter screen with thin layer, bubbles burst makes air overflow from lubricating oil, thus reaches the object of Oil-gas Separation.But flat deaerator in oil viscosity large or bubble hour, inferior separating effect, and when oil mass is larger, deaerator volume is large.
Dynamic pressure type deaerator utilizes liquid in rotation centrifugal force to realize Oil-gas Separation.But dynamic pressure type deaerator is comparatively large by the impact of frictional force, lubricating oil angular velocity of rotation, and separating effect is not good.
Centrifugal oil-air separator utilizes the High Rotation Speed of rotor to make oil gas obtain very high tangential velocity, utilizes lubricating oil to realize Oil-gas Separation from the different of air density.The gas mixture import of existing centrifugal oil-air separator and oil outlet are same aperture, increase gas mixture and enter the resistance that the resistance of deaerator and lubricating oil be thrown out of, thus cause separating effect to decline; Complex structure simultaneously, difficulty of processing is large, and the installation position needing configuration to match and installation regulate, and matching requirements are high, assembling difficulty is large.
Summary of the invention
The object of the invention is to provide a kind of deaerator for power plant gear-box and aeroengine, enters large with the resistance being separated discharge, cause inferior separating effect to solve existing centrifugal oil-air separator oil gas thing; Complex structure, difficulty of processing is large, and the installation position needing configuration to match and installation regulate, and matching requirements are high, assembling difficulty is large; And the technical problem of the deaerator inferior separating effect of other types etc.
For achieving the above object, the technical solution used in the present invention is as follows:
For a deaerator for power plant gear-box, comprise separator cover and cyclone cover; The shaft core position of separator cover is provided with the connecting bushing for connecting gearbox drive axle, gearbox drive axle to be connected on connecting bushing and to drive deaerator to rotate, and cyclone cover is sealed on semiclosed cavity that separator cover and connecting bushing enclose formation and forms gas mixture separation cavity; Cyclone cover on the wall body near connecting bushing or separator cover near connecting bushing wall body on offer at least one gas mixture import, the wall body relative with wall body residing for gas mixture import offers at least one for isolated gas being discharged the relief opening of gas mixture separation cavity, relief opening is arranged near connecting bushing; The wall of connecting bushing is provided with the separation dividing plate arranged in gas mixture separation cavity for gas mixture being carried out centrifugal separation, is separated between dividing plate and separator cover and leaves spacing; Separator cover offers at least one for isolated lubricating oil being discharged the oil outlet of gas mixture separation cavity, separation separator face is in same plane to the one side of gas mixture import with oil outlet; Or it is tangent with the hole wall of oil outlet to the one side of described gas mixture import to be separated separator face.
Further, separator cover comprises cover chassis and cover sidewall, connecting bushing is located at the shaft core position on cover chassis, and cover chassis, cover sidewall and connecting bushing enclose semiclosed cavity, and cyclone cover is sealed on the semiclosed cavity between cover sidewall and connecting bushing and forms gas mixture separation cavity; Gas mixture import be located at cover chassis near connecting bushing wall body on or be located at cyclone cover near connecting bushing wall body on, relief opening is opened on the wall body that residing for gas mixture import, wall body is relative; Oil outlet is opened on the wall body of cover sidewall.
Further, separation dividing plate is annular slab, is separated dividing plate and cyclone cover and/or covers chassis parallel.
Further, be separated at least one of dividing plate and wear tapering; Or the two sides being separated dividing plate is plane.
Further, gas mixture import is set to multiple, and multiple gas mixture import is equidistantly arranged along wall body circumference; Relief opening is set to multiple, and multiple relief opening is equidistantly arranged along wall body circumference; Oil outlet is set to multiple, and multiple oil outlet is equidistantly arranged along wall body circumference.
Further, gas mixture import and relief opening one_to_one corresponding are arranged.
Further, at least one in gas mixture import, relief opening, oil outlet is set to tapered opening or circular open.
Further, at least one side being separated dividing plate is provided with the guiding groove radially arranged, the gib block radially arranged, volute gib block or volute guiding groove.
Further, adopt between separator cover and cyclone cover and be tightly connected; Adopt between connecting bushing and cyclone cover and be tightly connected.
According to a further aspect in the invention, additionally provide a kind of aeroengine, comprise drive gearbox, in drive gearbox, be provided with the above-mentioned deaerator for power plant gear-box.
The present invention has following beneficial effect:
Deaerator of the present invention, is provided with separately gas mixture import, oil outlet and relief opening, does not interfere with each other between each import and export; Be separated dividing plate when rotated, gas mixture is subject to the centrifugal force double action of axial resistance and radial direction being separated baffle surface, gas is bloated rapidly from lubricating oil, thus is effectively separated with heavy lubricating oil by light gas; Separation separator face is in same plane to the one side of gas mixture import with oil outlet, is convenient to the lubricating oil after centrifugation and discharges from oil outlet; Gas mixture import and relief opening lay respectively at and are separated dividing plate both sides, and are positioned as close to separator axle center layout, make gas mixture at separation baffle surface lengthened stroke, thus are separated by oil gas fully, improve the effect be separated.
Gas mixture and isolated air are isolated by dividing plate by this technology, good separating effect.Deaerator adopts kit form, and part is convenient to processing, ensure that functional reliability.
The present invention has been applied on certain type auxiliary power unit, shows, this technical products good separating effect, reliable operation, not by the impact of frictional force, lubricating oil angular velocity of rotation through reality examination and use.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to accompanying drawings, the present invention is further detailed explanation.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of the deaerator for power plant gear-box of the preferred embodiment of the present invention.
Marginal data:
1, separator cover; 101, chassis is covered; 102, cover sidewall; 2, cyclone cover; 3, connecting bushing; 4, gas mixture import; 5, relief opening; 6, dividing plate is separated; 7, oil outlet.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the present invention can by the multitude of different ways that limits and cover implement.
Fig. 1 is the structural representation of the deaerator for power plant gear-box of the preferred embodiment of the present invention.As shown in Figure 1, the deaerator for power plant gear-box of the present embodiment, comprises separator cover 1 and cyclone cover 2; The shaft core position of separator cover 1 is provided with the connecting bushing 3 for connecting gearbox drive axle, gearbox drive axle to be connected on connecting bushing 3 and to drive deaerator to rotate, and cyclone cover 2 is sealed on semiclosed cavity that separator cover 1 and connecting bushing 3 enclose formation and forms gas mixture separation cavity; Cyclone cover 2 near connecting bushing 3 wall body on or separator cover 1 near connecting bushing 3 wall body on offer at least one gas mixture import 4, the wall body relative with wall body residing for gas mixture import 4 offers at least one for isolated gas being discharged the relief opening 5 of gas mixture separation cavity, relief opening 5 is arranged near connecting bushing 3; The wall of connecting bushing 3 is provided with the separation dividing plate 6 arranged in gas mixture separation cavity for gas mixture being carried out centrifugal separation, is separated between dividing plate 6 and separator cover 1 and leaves spacing; Separator cover 1 offers at least one for isolated lubricating oil being discharged the oil outlet 7 of gas mixture separation cavity, separation dividing plate 6 is in same plane towards the one side of gas mixture import 4 with oil outlet 7; Or it is tangent with the hole wall of oil outlet 7 towards the one side of gas mixture import 4 to be separated dividing plate 6.Deaerator of the present invention, is provided with separately gas mixture import 4, oil outlet 7 and relief opening 5, does not interfere with each other between each import and export, be separated dividing plate 6 when rotated, gas mixture is subject to the centrifugal force double action of axial resistance and radial direction being separated dividing plate 6 surface, gas is bloated rapidly from lubricating oil, thus is effectively separated with heavy lubricating oil by light gas, separation dividing plate 6 is in same plane towards the one side of gas mixture import 4 with oil outlet 7, or it is tangent with the hole wall of oil outlet 7 towards the one side of gas mixture import 4 to be separated dividing plate 6, be convenient to the lubricating oil after centrifugation discharge from oil outlet 7, especially when being separated dividing plate 6 and being tangent with the hole wall of oil outlet 7 towards the one side of gas mixture import 4, oil outlet 7 is just in time in the interface of centrifugation, the lubricating oil separated just in time enters into oil outlet 7 along the centrifugal track that separates, and penetrate from oil outlet 7, the obstruction of wall body to lubricating oil is little, gas mixture import 4 and relief opening 5 lay respectively at and are separated dividing plate 6 both sides, and are positioned as close to separator axle center layout, gas mixture is extended at separation dividing plate 6 surface travel, thus is separated by oil gas fully, improve the effect be separated.
As shown in Figure 1, in the present embodiment, separator cover 1 comprises cover chassis 101 and cover sidewall 102, connecting bushing 3 is located at the shaft core position on cover chassis 101, cover chassis 101, cover sidewall 102 and connecting bushing 3 enclose semiclosed cavity, and cyclone cover 2 is sealed on the semiclosed cavity between cover sidewall 102 and connecting bushing 3 and forms gas mixture separation cavity; Gas mixture import 4 be located at cover chassis 101 near connecting bushing 3 wall body on or be located at cyclone cover 2 near connecting bushing 3 wall body on, relief opening 5 is opened on the wall body that residing for gas mixture import 4, wall body is relative; Oil outlet 7 is opened on the wall body of cover sidewall 102.
As shown in Figure 1, in the present embodiment, being separated dividing plate 6 be annular slab, separation dividing plate 6 and cyclone cover 2 and/or to cover chassis 101 parallel.Thus reduce the resistance rotated, reduce energy consumption, raise the efficiency.
As shown in Figure 1, in the present embodiment, be separated at least one of dividing plate 6 and worn tapering; Or the two sides being separated dividing plate 6 is plane.As required, change the surface reaction forces being separated dividing plate 6 pairs of gas mixtures, thus improve the efficiency of Oil-gas Separation.
As shown in Figure 1, in the present embodiment, gas mixture import 4 is set to multiple, and multiple gas mixture import 4 is equidistantly arranged along wall body circumference; Relief opening 5 is set to multiple, and multiple relief opening 5 is equidistantly arranged along wall body circumference; Oil outlet 7 is set to multiple, and multiple oil outlet 7 is equidistantly arranged along wall body circumference.Improve the efficiency of Oil-gas Separation.
As shown in Figure 1, in the present embodiment, gas mixture import 4 and relief opening 5 one_to_one corresponding are arranged.Improve the efficiency of Oil-gas Separation.
In the present embodiment, at least one in gas mixture import 4, relief opening 5, oil outlet 7 is set to tapered opening or circular open.Change the caliber size of import and export as required, import and export can implement corresponding structure function smoothly so that each, improve the efficiency of Oil-gas Separation.
In the present embodiment, at least one side being separated dividing plate 6 is provided with the guiding groove radially arranged, the gib block radially arranged, volute gib block or volute guiding groove.In order to guide the course of gas mixture, be convenient to Oil-gas Separation and lubricating oil throws away.
As shown in Figure 1, in the present embodiment, adopt between separator cover 1 and cyclone cover 2 and be tightly connected; Adopt between connecting bushing 3 and cyclone cover 2 and be tightly connected.Preferably, be tightly connected employing welded seal.Improve sealing effect, prevent gas mixture from leaking and cause Oil-gas Separation failure.
The aeroengine of the present embodiment, comprises drive gearbox, is provided with the above-mentioned deaerator for power plant gear-box in drive gearbox.
During enforcement, gas mixture enters from gas mixture import 4, under the effect of the high tangential velocity produced under the High Rotation Speed of deaerator, the lubricating oil that density is large enters in gear-box chamber by oil outlet 7 under the guiding being separated dividing plate 6, air after separation discharges gear-box by relief opening 5, thus realizes oil, gas separation.
The efficient deaerator of the present invention as shown in Figure 1, comprises separator cover 1, cyclone cover 2 and is separated dividing plate 6, is separated dividing plate 6 and the lubricating oil separated is guided to oil outlet 7, and in order to the air of isolating gas mixture He separate.Several gas mixture import 4 is evenly had near axle center place in cyclone cover 2; Separator cover 1 outer wall be positioned at gas mixture import 4 side and be separated the tangent place of dividing plate 6 and circumferentially evenly have oil outlet 7.For preventing gas mixture from entering in separator chamber from oil outlet 7, oil outlet 7 is designed to narrow and small aperture.The relative wall of the gas mixture import 4 of separator cover 1 evenly offers relief opening 5 near shaft core position place.Gas mixture import 4, oil outlet 7, relief opening 5 three import and export are separate, are independent of each other.When deaerator High Rotation Speed, enter the mixture of separator under the influence of centrifugal force, the sidewall of separator cover 1 is thrown toward along separation dividing plate 6, and by oil outlet 7, lubricating oil is got rid of in gear-box chamber, separated air is less due to density, is discharged by the relief opening 5 of separator cover 1, realizes oil, gas is separated.
Deaerator has the following advantages:
(1) be provided with separately gas mixture import 4, oil outlet 7 and relief opening 5, do not interfere with each other between each import and export;
(2) being separated dividing plate 6 is piths of deaerator, and separator when rotated can separation oil and gas mixture effectively;
(3) have oil outlet 7 in separator cover 1 outer wall radial direction, position at the suction side of gas mixture import 4, and with to be separated dividing plate 6 tangent, be convenient to the lubricating oil after centrifugation and discharged from oil outlet 7;
(4) gas mixture import 4 and relief opening 5 lay respectively at and are separated dividing plate 6 both sides, and as far as possible near separator axle center.
(5) deaerator adopts kit form, and part is convenient to processing, ensure that functional reliability.
(6) be applied on certain type auxiliary power unit, show through reality examination and use, this deaerator good separating effect, reliable operation, not by the impact of frictional force, lubricating oil angular velocity of rotation.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. for a deaerator for power plant gear-box,
Comprise separator cover (1) and cyclone cover (2);
The shaft core position of described separator cover (1) is provided with the connecting bushing (3) for connecting gearbox drive axle,
It is characterized in that,
Described cyclone cover (2) is sealed on semiclosed cavity that described separator cover (1) and described connecting bushing (3) enclose formation and forms gas mixture separation cavity;
Described cyclone cover (2) near described connecting bushing (3) wall body on or described separator cover (1) near described connecting bushing (3) wall body on offer at least one gas mixture import (4)
The wall body relative with the residing wall body of described gas mixture import (4) offers at least one for isolated gas being discharged the relief opening (5) of gas mixture separation cavity,
Described relief opening (5) is arranged near described connecting bushing (3);
The wall of described connecting bushing (3) is provided with the separation dividing plate (6) arranged in gas mixture separation cavity for gas mixture being carried out centrifugal separation,
Spacing is left between described separation dividing plate (6) and described separator cover (1);
Described separator cover (1) offers at least one for isolated lubricating oil being discharged the oil outlet (7) of gas mixture separation cavity,
Described separation dividing plate (6) is in same plane towards the one side of described gas mixture import (4) with the central axis of described oil outlet (7); Or described separation dividing plate (6) is tangent with the hole wall of described oil outlet (7) towards the one side of described gas mixture import (4).
2. the deaerator for power plant gear-box according to claim 1, is characterized in that,
Described separator cover (1) comprises cover chassis (101) and cover sidewall (102),
Described connecting bushing (3) is located at the shaft core position of described cover chassis (101),
Described cover chassis (101), described cover sidewall (102) and described connecting bushing (3) enclose described semiclosed cavity,
Described cyclone cover (2) is sealed on the described semiclosed cavity between described cover sidewall (102) and described connecting bushing (3) and forms described gas mixture separation cavity;
Described gas mixture import (4) be located at described cover chassis (101) near described connecting bushing (3) wall body on or be located at described cyclone cover (2) near described connecting bushing (3) wall body on
Described relief opening (5) is opened on the relative wall body of the residing wall body of described gas mixture import (4);
Described oil outlet (7) is opened on the wall body of described cover sidewall (102).
3. the deaerator for power plant gear-box according to claim 2, is characterized in that,
Described separation dividing plate (6) is annular slab,
Described separation dividing plate (6) is parallel with described cyclone cover (2) and/or described cover chassis (101).
4. the deaerator for power plant gear-box according to claim 2, is characterized in that, described at least one of separation dividing plate (6) has worn tapering; Or the two sides of described separation dividing plate (6) is plane.
5. the deaerator for power plant gear-box according to claim 1, is characterized in that,
Described gas mixture import (4) is set to multiple,
Multiple described gas mixture import (4) is equidistantly arranged along wall body circumference;
Described relief opening (5) is set to multiple,
Multiple described relief opening (5) is equidistantly arranged along wall body circumference;
Described oil outlet (7) is set to multiple,
Multiple described oil outlet (7) is equidistantly arranged along wall body circumference.
6. the deaerator for power plant gear-box according to claim 1, is characterized in that, described gas mixture import (4) and described relief opening (5) one_to_one corresponding are arranged.
7. the deaerator for power plant gear-box according to any one of claim 1 to 6, it is characterized in that, at least one in described gas mixture import (4), described relief opening (5), described oil outlet (7) is set to tapered opening or circular open.
8. the deaerator for power plant gear-box according to any one of claim 1 to 6, it is characterized in that, at least one side of described separation dividing plate (6) is provided with the guiding groove radially arranged, the gib block radially arranged, volute gib block or volute guiding groove.
9. the deaerator for power plant gear-box according to any one of claim 1 to 6, is characterized in that,
Adopt between described separator cover (1) and described cyclone cover (2) and be tightly connected;
Adopt between described connecting bushing (3) and described cyclone cover (2) and be tightly connected.
10. an aeroengine, comprises drive gearbox, it is characterized in that, is provided with the deaerator for power plant gear-box according to any one of claim 1 to 9 in described drive gearbox.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410314605.8A CN104141775B (en) | 2014-07-03 | 2014-07-03 | For deaerator and the aeroengine of power plant gear-box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410314605.8A CN104141775B (en) | 2014-07-03 | 2014-07-03 | For deaerator and the aeroengine of power plant gear-box |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104141775A CN104141775A (en) | 2014-11-12 |
| CN104141775B true CN104141775B (en) | 2016-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410314605.8A Active CN104141775B (en) | 2014-07-03 | 2014-07-03 | For deaerator and the aeroengine of power plant gear-box |
Country Status (1)
| Country | Link |
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| CN (1) | CN104141775B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108204281B (en) * | 2016-12-20 | 2019-08-27 | 中国航发商用航空发动机有限责任公司 | Gs-oil separator, oil and gas separating system and aero-engine |
| CN106621578B (en) * | 2016-12-21 | 2019-05-14 | 中国燃气涡轮研究院 | A kind of axial admission eccentric contract |
| JP2019157708A (en) * | 2018-03-09 | 2019-09-19 | 株式会社豊田自動織機 | Centrifugal compressor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4362473A (en) * | 1980-05-19 | 1982-12-07 | Zeilon Sten Olof | Rotary compressor for gas and liquid mixtures |
| EP0162441B1 (en) * | 1984-05-23 | 1989-07-26 | STEIN INDUSTRIE Société Anonyme dite: | Centrifugal separator for mixtures |
| CN2764467Y (en) * | 2005-02-24 | 2006-03-15 | 山东省潍坊生建机械厂（集团） | Gas-liquid separator |
| CN201486620U (en) * | 2009-06-15 | 2010-05-26 | 奇瑞汽车股份有限公司 | Oil-gas separator of automobile engine |
| CN102872982B (en) * | 2012-10-08 | 2014-08-06 | 中国航空动力机械研究所 | Oil gas separation device |
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2014
- 2014-07-03 CN CN201410314605.8A patent/CN104141775B/en active Active
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| CN104141775A (en) | 2014-11-12 |
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Address after: Dong Jiaduan 412002 in Hunan province Zhuzhou city Lusong District Patentee after: AECC HUNAN AVIATION POWERPLANT Research Institute Country or region after: China Address before: Dong Jiaduan 412002 in Hunan province Zhuzhou city Lusong District Patentee before: CHINA AVIATION POWER MACHINERY INSTITUTE Country or region before: China |
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