CN110005545A - A kind of mouse cage elastically yielding bearing cavity configuration - Google Patents
A kind of mouse cage elastically yielding bearing cavity configuration Download PDFInfo
- Publication number
- CN110005545A CN110005545A CN201910130151.1A CN201910130151A CN110005545A CN 110005545 A CN110005545 A CN 110005545A CN 201910130151 A CN201910130151 A CN 201910130151A CN 110005545 A CN110005545 A CN 110005545A
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- China
- Prior art keywords
- mouse cage
- bearing
- shell
- inner ring
- elastic support
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- 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
- F01D25/18—Lubricating arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/42—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using liquid or gaseous propellants
- F02K9/60—Constructional parts; Details not otherwise provided for
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Rolling Contact Bearings (AREA)
- Sealing Of Bearings (AREA)
Abstract
The present invention relates to a kind of mouse cage elastically yielding bearing cavity configurations, obturage comb tooth, graphite annulus, bearing, snap ring and shaft etc. in the intracorporal Zigzag type mouse cage elastic support of shell, contact face seals, lubricating oil including being provided with the shell of oil inlet pipe and being arranged；Zigzag type mouse cage elastic support is installed in casing annular slot, and the aperture of multiple circumference uniform distributions is provided in shell inner ring；Contact end face seal is set to bearing cavity configuration one end；Under working condition, high pressure lubricating oil, which is set, enters bearing bore in the oil inlet pipe on shell, contact end face seal and bearing are successively cooled down by predetermined flowpath, lubricating oil after cooling, which is set, is discharged bearing bore in the aperture in shell inner ring, acts on through orifice restriction, lubricating oil is full of in bearing bore, form 0.6MPa~0.7MPa normal pressure, to meet the pressure condition of contact end face seal normal work, the isolation to external high-temperature fuel gas is realized, it is ensured that bearing bore works normally.
Description
Technical field
The present invention relates to a kind of mouse cage elastically yielding bearing cavity configurations, can be applied to liquid-propellant rocket engine and air suction type group
Close power engine.
Background technique
In air suction type assembly power engine, it usually needs setting is used for the turbine of supercharging air, and suction air is simultaneously
Pressurization, provides combustion air for engine.Turbine is mainly made of compressor, turbine and shaft etc., compressor, turbine and
Therefore shaft high speed rotation needs to be arranged in the turbine corresponding supporting structure, realization is close to the bearing of shaft and to bearing
The cooling and lubricating of envelope.
Air suction type assembly power engine is mainly formed by aero-engine, punching engine and rocket combination,
Wherein the turbine technology of assembly power engine is mostly derived from aero-engine, on its basis further development and improvement.
In aero-engine, being supported to shaft, carrying out the structure of cooling and lubricating to bearing seal is bearing bore, and bearing bore is general
By oil seal, pressurization bleed air system, air sealing, blow-off system, draining off leak oil exhaust system and hot environment shielding system
Deng typical technical characteristic are as follows: in aero-engine, the maximum pressure of the aerodynamic parameter of compressor and turbine basic one
Cause, when bearing bore is set to any position of engine, can by from generator terminal bleed of calming the anger come the intracavitary external environment pressure of equalizer bearing
Power is realized to the sealing of lubricating oil, oil extraction, meets hot environment shielding system service pressure condition etc., it is ensured that bearing bore is just
Often work.
In assembly power engine of the present invention, the compressor part of turbine is taken out under high-temperature high-pressure fuel gas turbine drives
It inhales high temperature air and is pressurized, air pressure is far below turbine gaseous-pressure.Bearing bore integral outer environment is high-temperature low-pressure air,
Side is the combustion gas of high temperature and pressure turbine.Since air pressure is low, temperature is high, bearing bore can not be introduced and be pressurized, once it introduces,
Aerodynamic Heating is caused to bearing bore instead, influences the normal work of bearing seal, Aero-engine Bearing chamber design method can not
Meet requirement.
The content of invention
To solve the problems, such as that existing bearing cavity configuration is unable to satisfy assembly power engine requirement, the present invention provides one
Kind mouse cage elastically yielding bearing cavity configuration, establishes the lubricating oil flow path in bearing bore, realizes cooling and lubricating bearing.
The technical solution of the invention is as follows:
A kind of mouse cage elastically yielding bearing cavity configuration is provided, including shell, the oil inlet pipe being set on shell, is arranged in shell
Intracorporal Zigzag type mouse cage elastic support, contact face seal components, lubricating oil obturage comb tooth, graphite annulus, bearing；
The shell includes the annular groove of inner ring and outer rings composition, is provided with multiple circumferentially uniformly distributed apertures in inner ring；Institute
Zigzag type mouse cage elastic support is stated to be installed in casing annular slot；
The Zigzag type mouse cage elastic support includes outer ring and inner ring；The coaxial bearing is set to Zigzag type mouse cage elasticity
The inner hole of support inner ring, outer race are fixed to the inner ring of Zigzag type mouse cage elastic support；
The graphite annulus is coaxially arranged to obturage comb in shell inner ring inner hole, the graphite annulus and the lubricating oil being set in shaft
Tooth cooperatively forms sealing structure；
The open end of the contact face seal components closing shell, isolation bearing chamber and external high temperature combustion gas；
Lubricating oil enters bearing bore through oil inlet pipe, through the cooling contact face seal components of Zigzag type mouse cage elastic support outer ring
And bearing, it is discharged through the aperture in shell inner ring.
Preferably, the Zigzag type mouse cage elastic support inner ring and the unilateral setting gap of interannular in shell, are arranged O shape rubber
Sealing ring blocks the lubricating oil flowing in gap.
Preferably, Zigzag type mouse cage elastic support outer ring is made of the spoke being uniformly distributed circumferentially.
Preferably, the graphite ring outer surface and shell inner ring inner hole are interference fitted.
Preferably, Zigzag type mouse cage elastic support is made of spring steel.
Preferably, the outer ring of bearing is fixed by the protrusion of snap ring and Zigzag type mouse cage elastic support from both ends axial limiting.
Preferably, when shaft works normally, O shape rubber seal inhibits the vibration of Zigzag type mouse cage elastic support；?
When shaft is abnormal radial vibration, radial vibration occurs therewith for Zigzag type mouse cage elastic support inner ring, and vibration amplitude is more than folding
When returning the gap size of interannular in formula mouse cage elastic support inner ring and shell, shell inner ring generates radial limit to it, avoids sending out
It is bad that raw structure touches worn-off.
Preferably, contact face seal components include rotating ring and stationary ring, and rotating ring is set in shaft, in bearing rear end,
It is rotated with shaft；Stationary ring is for bearing bore to be isolated with external high temperature combustion gas.
Preferably, it is full of lubricating oil in bearing bore, forms 0.6MPa~0.7MPa normal pressure, reaches contact end face seal group
The pressure condition that part works normally realizes the isolation to high-temperature fuel gas.
Preferably, it is adjusted into the aperture of aperture and number on the lubricating oil pressure and shell inner ring of oil inlet pipe, to bearing
Intracavitary lubricating oil pressure and flow are adjusted, thus meet bearing and contact face seal components cooling and lubricating requirement, and
The operating pressure requirement of contact face seal components.
The invention has the following advantages over the prior art:
(1) annular groove being made of inner ring and outer rings is provided on inventive shell 1, Zigzag type mouse cage elastic support 3 is pacified
Loaded in 1 annular groove of shell, the bearing to shaft, compact dimensions are realized；
(2) it is provided with oil inlet pipe 2 on inventive shell 1, under working condition, high pressure lubricating oil enters bearing bore through oil inlet pipe 2,
Collected through bearing bore liquid collecting cavity, circumference uniform distribution shunts, contact face seal components 4 are successively cooled down by predetermined flowpath rub it is secondary and
Bearing 7 meets the cooling and lubricating requirement of bearing 7 and contact face seal components 4；Lubricating oil after cooling is set in shell
Bearing bore is discharged in aperture in 1 inner ring, acts on through orifice restriction, and lubricating oil is full of in bearing bore, formed in bearing bore 0.6MPa~
0.7MPa normal pressure reaches the pressure condition of the normal work of contact face seal components 4, realize to external high-temperature fuel gas every
From, it is ensured that bearing bore works normally；Compared with prior art, the present invention do not quote compressor air carry out bearing bore pressurization and it is close
Envelope, is designed by bearing cavity configuration, carries out orifice restriction to lubricating oil oil extraction in bearing bore, is established and is met sealing requirement
Bearing cavity pressure can effectively reduce the mistake of compressor air Secondary Flow path loss, improve engine efficiency.
(3) interannular is provided with O shape rubber seal 9 in 3 inner ring of Zigzag type mouse cage elastic support of the present invention and shell 1, and one
Aspect can assist the lubricating oil flow path established in bearing bore, it is ensured that lubricating oil presses design point cooling and lubricating bearing and sealing；It is another
Aspect, O shape rubber seal 9 have elastic damping effect, can be realized the vibration suppression to Zigzag type mouse cage elastic support 3,
Structure is simple and effective.
Detailed description of the invention
Fig. 1 is a kind of mouse cage elastically yielding bearing cavity configuration sectional view of the invention；
Fig. 2 is shell of the invention and Zigzag type mouse cage elastic support inner ring and outer rings structure；
Fig. 3 is lubricating oil flow path of the invention；
Fig. 4 is inventive shell end face aperture distribution schematic diagram；
Fig. 5 is Zigzag type mouse cage elastic support outer ring structure schematic diagram of the present invention；
Fig. 6 is O shape rubber seal scheme of installation of the present invention.
Wherein appended drawing reference are as follows: 1- shell, 2- oil inlet pipe, 3- Zigzag type mouse cage elastic support, the end face seal of 4- contact,
5- lubricating oil obturages comb tooth, 6- graphite annulus, 7- bearing, 8- snap ring, 9-O shape rubber seal.
Specific embodiment
A kind of mouse cage elastically yielding bearing cavity configuration of the present invention is one kind of assembly power engine bearing cavity configuration design
Brand-new scheme.A kind of mouse cage elastically yielding bearing cavity configuration provided by the present invention in conjunction with Fig. 1-2, including shell 1, is set to
Oil inlet pipe 2, setting on shell 1 is in the intracorporal Zigzag type mouse cage elastic support 3 of shell, contact face seal components 4, lubricating oil envelope
Tight comb tooth 5, graphite annulus 6, bearing 7, snap ring 8, O shape rubber seal 9 and shaft etc..
It is provided with the annular groove being made of inner ring and outer rings on the shell 1, multiple circumference uniform distributions are provided in inner ring
Aperture, in conjunction with Fig. 4, aperture is circumferentially uniformly distributed along end face；The Zigzag type mouse cage elastic support 3 is installed on 1 annular groove of shell
It is interior；Zigzag type mouse cage elastic support 3 is made of outer ring and inner ring, spoke connection is provided on outer ring, in conjunction with Fig. 5, spoke is set
It sets so that the rigidity of Zigzag type mouse cage elastic support reduces, elasticity increases, and Zigzag type mouse cage elastic support is made of spring steel；
Bearing 7 is coaxially disposed at the inner hole of 3 inner ring of elastic support, and the outer ring of bearing 7 is by snap ring 8 and Zigzag type mouse cage elastic support 3
Raised axial limiting fix, the inner ring of bearing 7 is set in shaft, provides bearing for shaft high speed rotation.
The gap interannular unilateral setting 0.2mm in 3 inner ring of Zigzag type mouse cage elastic support and shell 1, while being provided with O
Shape rubber seal 9, the O shape rubber seal 9 can block the lubricating oil in gap to flow.In conjunction with Fig. 6, O shape rubber seal
Circle 9 is arranged in the card slot of 1 inner ring of shell, and closes the gap 0.2mm.The graphite annulus 6 is coaxially arranged in 1 inner ring inner hole of shell
Place, 6 outer surface of graphite annulus and 1 inner ring bore area of shell are interference fitted, cunning graphite annulus 6 and be set in shaft
Oil sealing sternly comb tooth 5 cooperatively forms minim gap sealing structure.
The contact face seal components 4 are set to bearing bore side, contact face seal components 4 include rotating ring and
Stationary ring, rotating ring are set in shaft, in bearing rear end, are rotated with shaft；Stationary ring be used for by bearing bore and external high temperature combustion gas into
Row isolation.
It is provided with oil inlet pipe 2 on shell 1, under working condition, high pressure lubricating oil enters bearing bore through oil inlet pipe 2, through bearing bore
Liquid collecting cavity, which is collected, circumference uniform distribution shunts, contact face seal components 4 are successively cooled down by predetermined flowpath rubs secondary and bearing 7, full
Sufficient bearing 7 and the requirement of the cooling and lubricating of contact face seal components 4；Lubricating oil after cooling is set in 1 inner ring of shell
Bearing bore is discharged in aperture, acts on through orifice restriction, and lubricating oil is full of in bearing bore, forms 0.6MPa~0.7MPa positive pressure in bearing bore
Power reaches the pressure condition of the normal work of contact face seal components 4, realizes the isolation to external high-temperature fuel gas, it is ensured that axis
Hold chamber normal work.
As shown in figure 3, high pressure lubricating oil, which is set, enters bearing bore in the oil inlet pipe 2 on shell 1, through bearing bore when work
Liquid collecting cavity, which is collected, circumference uniform distribution shunts, contact face seal components 4 are successively cooled down by predetermined flowpath rubs secondary and bearing 7, cold
But the lubricating oil after, which is set, is discharged bearing bore in the aperture in 1 inner ring of shell, acts on through orifice restriction, full of cunning in bearing bore
Oil, bearing bore is interior to form 0.6MPa~0.7MPa normal pressure, to meet the pressure of the normal work of contact face seal components 4
Condition realizes the isolation to external high-temperature fuel gas, it is ensured that bearing bore works normally；When shaft works normally, due to O shape rubber
Sealing ring 9 has elastic damping effect, can inhibit to the vibration of Zigzag type mouse cage elastic support 3, improves shaft operating
Stability；When shaft is abnormal radial vibration, through bearing intermal force, 3 inner ring of Zigzag type mouse cage elastic support is sent out therewith
Raw radial vibration, when unilateral radial vibration deforms more than 0.2mm, 1 inner ring of shell generates radial position-limiting action to it, avoids occurring
Structure touches mill and destruction.
The present invention can aperture by adjusting aperture in entrance lubricating oil pressure, 1 inner ring of shell and number, to sliding in bearing bore
Oil pressure is adjusted, to adapt to 4 cooling and lubricating demand of different operating condition lower bearings 7 and contact face seal components, adapt to
4 service pressure condition of contact face seal components requirement under different external environments.
The above, optimal specific embodiment only of the invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.
The content that description in the present invention is not described in detail belongs to the well-known technique of professional and technical personnel in the field.
Claims (10)
1. a kind of mouse cage elastically yielding bearing cavity configuration, including shell (1), the oil inlet pipe (2) being set on shell (1), setting
Comb tooth (5), graphite annulus are obturaged in the intracorporal Zigzag type mouse cage elastic support (3) of shell, contact face seal components (4), lubricating oil
(6), bearing (7)；It is characterized by:
The shell (1) includes the annular groove of inner ring and outer rings composition, is provided with multiple circumferentially uniformly distributed apertures in inner ring；It is described
Zigzag type mouse cage elastic support (3) is installed in shell (1) annular groove；
The Zigzag type mouse cage elastic support (3) includes outer ring and inner ring；Bearing (7) coaxial arrangement is in Zigzag type mouse cage bullet
The inner hole of property support (3) inner ring, bearing (7) outer ring are fixed to the inner ring of Zigzag type mouse cage elastic support (3)；
The graphite annulus (6) is coaxially arranged in shell (1) inner ring inner hole, lubricating oil graphite annulus (6) and be set in shaft
It obturages comb tooth (5) and cooperatively forms sealing structure；
The open end of contact face seal components (4) closing shell (1), isolation bearing chamber and external high temperature combustion gas；
Lubricating oil enters bearing bore through oil inlet pipe (2), through the cooling contact end face seal group of Zigzag type mouse cage elastic support (3) outer ring
Part (4) and bearing (7) are discharged through the aperture in shell (1) inner ring.
2. mouse cage elastically yielding bearing cavity configuration as described in claim 1, which is characterized in that
The rubber seal of O shape is arranged in Zigzag type mouse cage elastic support (3) inner ring and the unilateral setting gap of shell (1) interior interannular
Enclosing (9) blocks the lubricating oil in gap to flow.
3. mouse cage elastically yielding bearing cavity configuration as claimed in claim 2, which is characterized in that Zigzag type mouse cage elastic support
(3) outer ring is made of the spoke being uniformly distributed circumferentially.
4. mouse cage elastically yielding bearing cavity configuration as claimed in claim 2 or claim 3, which is characterized in that graphite annulus (6) appearance
Face and shell (1) inner ring inner hole are interference fitted.
5. mouse cage elastically yielding bearing cavity configuration as claimed in claim 2 or claim 3, which is characterized in that Zigzag type mouse cage elasticity branch
Seat (3) is made of spring steel.
6. mouse cage elastically yielding bearing cavity configuration as claimed in claim 2 or claim 3, which is characterized in that the outer ring of bearing (7) is by card
The protrusion of ring (8) and Zigzag type mouse cage elastic support (3) is fixed from both ends axial limiting.
7. mouse cage elastically yielding bearing cavity configuration as claimed in claim 2 or claim 3, which is characterized in that when shaft works normally,
O shape rubber seal (9) inhibits the vibration of Zigzag type mouse cage elastic support (3)；When shaft is abnormal radial vibration, turn back
Radial vibration occurs therewith for formula mouse cage elastic support (3) inner ring, vibration amplitude be more than Zigzag type mouse cage elastic support (3) inner ring with
When the gap size of shell (1) interior interannular, shell (1) inner ring generates radial limit to it, avoids recurring structure from touching worn-off bad.
8. mouse cage elastically yielding bearing cavity configuration as claimed in claim 2 or claim 3, which is characterized in that contact end face seal group
Part (4) includes rotating ring and stationary ring, and rotating ring is set in shaft, in bearing rear end, is rotated with shaft；Stationary ring be used for by bearing bore with
External high temperature combustion gas is isolated.
9. mouse cage elastically yielding bearing cavity configuration as claimed in claim 2 or claim 3, which is characterized in that lubricating oil is full of in bearing bore,
0.6MPa~0.7MPa normal pressure is formed, the pressure condition of contact face seal components (4) normal work is reached, is realized to height
The isolation of warm combustion gas.
10. mouse cage elastically yielding bearing cavity configuration as claimed in claim 2 or claim 3, which is characterized in that be adjusted into oil inlet pipe
(2) aperture of aperture and number, adjust lubricating oil pressure in bearing bore and flow on lubricating oil pressure and shell (1) inner ring
It is whole, to meet bearing (7) and the requirement of contact face seal components (4) cooling and lubricating and contact face seal components
(4) operating pressure requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910130151.1A CN110005545B (en) | 2019-02-21 | 2019-02-21 | Squirrel-cage elastic supporting bearing cavity structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910130151.1A CN110005545B (en) | 2019-02-21 | 2019-02-21 | Squirrel-cage elastic supporting bearing cavity structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110005545A true CN110005545A (en) | 2019-07-12 |
| CN110005545B CN110005545B (en) | 2020-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910130151.1A Active CN110005545B (en) | 2019-02-21 | 2019-02-21 | Squirrel-cage elastic supporting bearing cavity structure |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110529425A (en) * | 2019-08-16 | 2019-12-03 | 中国航发北京航科发动机控制系统科技有限公司 | A kind of lubrication system for high revolving speed centrifugal pump |
| CN111637150A (en) * | 2020-05-27 | 2020-09-08 | 西安交通大学 | Foil hydrodynamic gas bearing system with elastic damping support structure |
| CN111911531A (en) * | 2020-07-29 | 2020-11-10 | 中国航发湖南动力机械研究所 | Return type elastic supporting structure and engine |
| CN111927632A (en) * | 2020-08-11 | 2020-11-13 | 中国航发湖南动力机械研究所 | Lubricating oil sealing structure and aircraft engine |
| CN112483415A (en) * | 2020-11-13 | 2021-03-12 | 西安航天动力研究所 | Liquid rocket engine low-temperature turbine pump based on integrated cylindrical supporting seat |
| CN112483650A (en) * | 2020-10-27 | 2021-03-12 | 中国船舶重工集团公司第七0三研究所 | Radial support and oil cavity seal of gas compressor |
| CN112503096A (en) * | 2020-11-27 | 2021-03-16 | 中国航发四川燃气涡轮研究院 | Bearing and bearing outer ring integrated structure |
| CN115217536A (en) * | 2022-09-14 | 2022-10-21 | 中国航发沈阳发动机研究所 | Intermediate fulcrum bearing cavity structure of counter-rotating turbine |
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| CN107165680A (en) * | 2017-05-27 | 2017-09-15 | 中国航发湖南动力机械研究所 | Power turbine output shaft structure |
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| GB582082A (en) * | 1941-05-07 | 1946-11-05 | Henry Lewis Guy | Improvements in pipe connections to enclosed members |
| US3994541A (en) * | 1975-10-03 | 1976-11-30 | Carrier Corporation | Bearing assembly |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110529425A (en) * | 2019-08-16 | 2019-12-03 | 中国航发北京航科发动机控制系统科技有限公司 | A kind of lubrication system for high revolving speed centrifugal pump |
| CN111637150A (en) * | 2020-05-27 | 2020-09-08 | 西安交通大学 | Foil hydrodynamic gas bearing system with elastic damping support structure |
| CN111637150B (en) * | 2020-05-27 | 2021-10-19 | 西安交通大学 | Foil hydrodynamic gas bearing system with elastic damping support structure |
| CN111911531A (en) * | 2020-07-29 | 2020-11-10 | 中国航发湖南动力机械研究所 | Return type elastic supporting structure and engine |
| CN111911531B (en) * | 2020-07-29 | 2021-12-24 | 中国航发湖南动力机械研究所 | Return type elastic supporting structure and engine |
| CN111927632A (en) * | 2020-08-11 | 2020-11-13 | 中国航发湖南动力机械研究所 | Lubricating oil sealing structure and aircraft engine |
| CN111927632B (en) * | 2020-08-11 | 2022-05-31 | 中国航发湖南动力机械研究所 | Lubricating oil sealing structure and aircraft engine |
| CN112483650A (en) * | 2020-10-27 | 2021-03-12 | 中国船舶重工集团公司第七0三研究所 | Radial support and oil cavity seal of gas compressor |
| CN112483415A (en) * | 2020-11-13 | 2021-03-12 | 西安航天动力研究所 | Liquid rocket engine low-temperature turbine pump based on integrated cylindrical supporting seat |
| CN112503096A (en) * | 2020-11-27 | 2021-03-16 | 中国航发四川燃气涡轮研究院 | Bearing and bearing outer ring integrated structure |
| CN115217536A (en) * | 2022-09-14 | 2022-10-21 | 中国航发沈阳发动机研究所 | Intermediate fulcrum bearing cavity structure of counter-rotating turbine |
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|---|---|
| CN110005545B (en) | 2020-08-18 |
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