CN106065816B - A kind of contact floating air film between centers sealing structure and installation method - Google Patents
A kind of contact floating air film between centers sealing structure and installation method Download PDFInfo
- Publication number
- CN106065816B CN106065816B CN201610621389.0A CN201610621389A CN106065816B CN 106065816 B CN106065816 B CN 106065816B CN 201610621389 A CN201610621389 A CN 201610621389A CN 106065816 B CN106065816 B CN 106065816B
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- Prior art keywords
- sealed track
- sealing ring
- sealing
- air film
- sealed
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Classifications
-
- 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
- F02C7/28—Arrangement of seals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
- B23P11/02—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits
- B23P11/025—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits by using heat or cold
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/003—Preventing or minimising internal leakage of working-fluid, e.g. between stages by packing rings; Mechanical seals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
- F01D11/04—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam
Abstract
The present invention relates to a kind of contact floating air film between centers sealing structure, for making to form sealing structure between external bushing and high-pressure shaft, contact floating air film between centers sealing structure includes retainer ring, spring, the first sealed track, sealing ring, the second sealed track, fixed pin, the 3rd sealed track, locking bed and locking member, and retainer ring, spring, the first sealed track, sealing ring, the second sealed track, fixed pin, the 3rd sealed track are placed between external bushing and high-pressure shaft；By being equipped with multiple bleed holes on sealing ring, air-flow forms air film by bleed hole in the sealed track end face contacted with sealing ring.The contact floating gas film sealing structure of the present invention can effectively improve seal performance relative to the sealing of comb tooth, reduce leakage rate, it is of great significance to solving the problems, such as that the next oil temperature of aero-engine, gas turbine application comb tooth band is high and lube use rate is big, the reliability of engine can be improved.
Description
Technical field
The invention belongs to engine, gas turbine design field, more particularly to a kind of contact floating air film between centers to seal
Structure and installation method.
Background technology
Between centers sealing is that various countries develop the sealing technique problem that advanced aero engine is faced, at present, aero-engine
Upper between centers sealing still generally uses comb tooth seal style, but since comb tooth sealing relative leakage amount is larger, easily produces engine
The problem of oil temperature height and big lube use rate, so as to reduce the reliability of engine.To further improve engine
Can, there is an urgent need to develop a kind of brand-new between centers sealing structure, to make up the performance loss that comb tooth band comes, but due to this
Sealing structure is between two high-speed rotation axis, and technical parameter is high, and design difficulty is very big.
The content of the invention
The object of the present invention is to provide a kind of contact floating air film between centers sealing structure, solve between current engine shaft
The problem of sealing leak amount is big.
To reach above-mentioned purpose, the technical solution adopted by the present invention is：A kind of contact floating air film between centers sealing structure,
For making to form sealing structure between external bushing and high-pressure shaft, the contact floating air film between centers sealing structure includes fixing
Ring, spring, the first sealed track, sealing ring, the second sealed track, fixed pin, the 3rd sealed track, locking bed and locking member,
And retainer ring, spring, the first sealed track, sealing ring, the second sealed track, fixed pin, the 3rd sealed track are placed in outer lining
Between set and high-pressure shaft；Wherein, retainer ring, spring, the first sealed track, the second sealed track offset successively, and sealing ring is placed in
Between first sealed track and the second sealed track, multiple fixed pins fix the second sealed track, and it is close that sealing ring is also placed in second
Seal between runway and the 3rd sealed track, the 3rd sealed track and locking bed are sequentially connected, and locking member is by locking bed and high-pressure shaft
It is fixed；Multiple bleed holes are equipped with sealing ring, air-flow is formed by bleed hole in the sealed track end face contacted with sealing ring
Air film.
Further, sealing ring is made of graphite material；Axis and sealing ring axis in the bleed hole that sealing ring is set
It is parallel, and bleed hole is evenly distributed with sealing ring radial direction.
Further, the position contacted on external bushing with sealing ring scribbles the graphite of material identical with sealing ring.
Further, fixed pin is three, and is distributed in the second sealed track radially, for preventing in hot state, heat
There is gap between the coefficient of expansion different sealing ring and external bushing.
Further, be equipped with swivelling chute in the face that the second sealed track is contacted with sealing ring, the 3rd sealed track with it is close
The face of seal ring contact also is provided with swivelling chute, and swivelling chute is used to promote the second sealed track and/or the 3rd sealed track and sealing ring
Between be easily formed air film.
Further, the first sealed track, the second sealed track and the 3rd sealed track and high-pressure shaft use small―gap suture
Coordinate, the scope of the small―gap suture x is 0mm ＜ x≤0.065mm.
Further, retainer ring is made of the metal material identical with high-pressure shaft.
Further, spring is wavy spring.
Further, sealing ring is further included, sealing ring is placed in the groove of the 3rd sealed track.
Present invention also offers a kind of installation method of contact floating air film between centers sealing structure, comprise the following steps
1) first heating retainer ring is loaded into high pressure axle journal, is interference fitted between retainer ring and high pressure axle journal；
2) spring, the first sealed track, sealing ring and the second sealed track are sequentially placed into, makes the bleed hole pair in sealing ring
Swivelling chute on accurate first sealed track, the first sealed track is fixed with fixed pin；
3) sealing ring is put into, sealing ring is put into the groove of the 3rd sealed track, is supported afterwards with the 3rd sealed track (7)
Firmly sealing ring；
4) after propping up the 3rd sealed track with locking bed, locking bed and high-pressure shaft are fixed with locking member.
The contact floating gas film sealing structure of the present invention can form stable hydrostatic air film in sealing surface, relatively
Seal performance can be effectively improved in the sealing of comb tooth, reduces leakage rate, it is close to solving aero-engine, gas turbine application comb tooth
Seal the problem of the oil temperature brought is high and lube use rate is big and be of great significance, the reliability of engine can be improved, promoted
Into the development of engine between centers sealing technique, the country of aero-engine and gas turbine between centers contact seal design has been filled up
Blank, is of great significance.
Brief description of the drawings
Attached drawing herein is merged in specification and forms the part of this specification, shows the implementation for meeting the present invention
Example, and for explaining the principle of the present invention together with specification.
Fig. 1 is the contact floating air film between centers sealed structure chart of one embodiment of the invention.
Fig. 2 is the sealing ring schematic diagram of one embodiment of the invention.
Fig. 3 is the sealing ring sectional view of one embodiment of the invention.
Fig. 4 is the second sealed track end view drawing of one embodiment of the invention.
Wherein, 1- retainer rings, 2- springs, the first sealed tracks of 3-, 4- sealing rings, the second sealed tracks of 5-, 6- fixed pins,
The 3rd sealed tracks of 7-, 8- locking beds, 9- locking members, 10- sealing rings, 11- external bushings, 12- high-pressure shafts, 13- low-pressure shafts, 41-
Bleed hole, 51- swivelling chutes.
Embodiment
To make the purpose, technical scheme and advantage that the present invention is implemented clearer, below in conjunction with the embodiment of the present invention
Attached drawing, the technical solution in the embodiment of the present invention is further described in more detail.In the accompanying drawings, identical from beginning to end or class
As label represent same or similar element or there is same or like element.Described embodiment is the present invention
Part of the embodiment, instead of all the embodiments.Embodiment below with reference to attached drawing description is exemplary type, it is intended to is used
It is of the invention in explaining, and be not considered as limiting the invention.Based on the embodiments of the present invention, ordinary skill people
Member's all other embodiments obtained under the premise of the work of creation type is not made, belong to the scope of protection of the invention.Under
Face is described in detail the embodiment of the present invention with reference to attached drawing.
In the description of the present invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", "front", "rear",
The orientation or position relationship of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " is based on attached drawing institutes
The orientation or position relationship shown, is for only for ease of the description present invention and simplifies description, rather than instruction or the dress for implying meaning
Put or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that the present invention is protected
The limitation of scope.
As shown in Figure 1 to shown in Fig. 4, contact floating air film between centers sealing structure of the invention, for make external bushing 1 with
Sealing structure is formed between high-pressure shaft 12, contact floating air film between centers sealing structure includes retainer ring 1, spring 2, first seals
Runway 3, sealing ring 4, the second sealed track 5, fixed pin 6, the 3rd sealed track 7, locking bed 8 and locking member 9, and retainer ring 1,
Spring 2, the first sealed track 3, sealing ring 4, the second sealed track 5, fixed pin 6, the 3rd sealed track 7 are placed in external bushing 1
Between high-pressure shaft 12；Wherein, retainer ring 1, spring 2, the first sealed track 3 offset successively, and sealing ring 4 is placed in the first sealing race
Between 3 and second sealed track 5 of road, multiple fixed pins 6 fix the second sealed track 5, and sealing ring 4 is also placed in the second sealed track
5 and the 3rd between sealed track 7, and the 3rd sealed track 7 and locking bed 8 offset successively, and locking member 9 is by locking bed 8 and high-pressure shaft
12 fix；Multiple bleed holes 41 are equipped with sealing ring 4, air-flow is by bleed hole 41 in the sealed track contacted with sealing ring 4
End face forms air film.Use mutual anti-rotation structure between each component, during work, the first sealed track 3, the second sealed track 5 and
3rd sealed track 7 is rotated with high-pressure shaft 12, and retainer ring 1 is rotated with low pressure components, sealing ring 4 will by high and low pressure component it
Between some rotary speed working.
It should be further noted that the sealing ring 4 in the present invention is made of graphite material, using sealing made of graphite
4 sealing effect of ring is excellent, and the axis in the bleed hole 41 that sealing ring 4 is set is parallel with 4 axis of sealing ring, and bleed hole 41 is close
4 radial direction of seal ring is evenly distributed with.As shown in figure 3, cause the stepped hole that hole 41 is set, air-flow flows into from the larger-diameter hole in left side,
Flowed out from the hole of right side small diameter, the stepped hole so set can amplify the pressure for the end face that air-flow is set to sealed track.Work
When making, air-flow may pass through bleed hole 41 and shoot to the end face for contacting sealed track, can form air film afterwards, further add
Strong sealing effect.Moreover, the graphite with 4 identical material of sealing ring is scribbled with the position that sealing ring 4 contacts on external bushing 11.
In addition, be equipped with swivelling chute 51 in the face that the second sealed track 5 is contacted with sealing ring 4, the 3rd sealed track 7 with it is close
The face that seal ring 4 contacts also is provided with swivelling chute 51, and swivelling chute 51 is easy to promote the second sealed track 5 and/or the in rotary course
Air film is easily formed between three sealed tracks 7 and sealing ring 4, in addition, the depth of swivelling chute 51 is nanoscale.As shown in figure 4, rotation
51 shape of turn trough is crescent.
In the present invention, fixed pin 6 is three, and is distributed in the second sealed track 5 radially, for preventing in Warm status
Under, there is gap between thermal coefficient of expansion different sealing ring 4 and external bushing 11.
In the present invention, the first sealed track 3, the second sealed track 5 and the 3rd sealed track 7 are used with high-pressure shaft 12
Small―gap suture coordinates, you can ensure that leakproofness has the advantages that more convenient installation again, the scope of the small―gap suture x be 0mm ＜ x≤
0.065mm。
In addition, retainer ring 1 is made of the metal material identical with high-pressure shaft 12, such as high-strength alloy steel etc., for protecting
Demonstrate,prove the intensity of total device.
Need specification, the spring 2 in the present invention can be installed to space using wavy spring, wavy spring
The position of very little, and with noise is reduced, reduce the specific function of vibration.
Finally, contact floating air film between centers sealing structure of the invention further includes sealing ring 10, and sealing ring 10 is placed in
In the groove of three sealed tracks 7, for ensureing leakproofness.
Contact floating air film between centers sealing structure more than introduces its installation method, comprises the following steps
1) first heating retainer ring 1 is loaded into high pressure axle journal, is interference fitted between retainer ring 1 and high pressure axle journal；
2) spring 2, the first sealed track 3,4 and second sealed track 5 of sealing ring are sequentially placed into, makes the bleed in sealing ring
Hole 41 is directed at the swivelling chute 51 on the first sealed track, and the first sealed track 5 is fixed with fixed pin 6；
3) sealing ring 4 is put into, sealing ring 10 is put into the groove of the 3rd sealed track 7, afterwards with the 3rd sealed track 7
Prop up sealing ring 4；
4) after propping up the 3rd sealed track 7 with locking bed 8, locking bed 8 and high-pressure shaft 12 are fixed with locking member 9.Locking
Part can be the component of bolt etc.
During work, low-pressure shaft 13 does not turn, high-pressure shaft 12 and the contact floating air film between centers sealing structure that is attached thereto are equal
Rotation, and the air-flow in the left side of sealing ring 4 is mapped to the end face of sealed track through bleed hole 41, in the end face swivelling chute of sealed track
51 form sealing air film, and employ two-stage sealing ring 4, add sealing effect.
The contact floating gas film sealing structure of the present invention can form stable hydrostatic air film in sealing surface, relatively
Seal performance can be effectively improved in the sealing of comb tooth, reduces leakage rate, it is close to solving aero-engine, gas turbine application comb tooth
Seal the problem of the oil temperature brought is high and lube use rate is big and be of great significance, the reliability of engine can be improved, promoted
Into the development of engine between centers sealing technique, the country of aero-engine and gas turbine between centers contact seal design has been filled up
Blank, is of great significance.
The above, is only the optimal embodiment of the present invention, but protection scope of the present invention is not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of the claim
Subject to enclosing.
Claims (10)
- A kind of 1. contact floating air film between centers sealing structure, for making to form sealing between external bushing (11) and high-pressure shaft (12) Structure, it is characterised in that contact floating air film between centers sealing structure includes retainer ring (1), spring (2), the first sealed track (3), sealing ring (4), the second sealed track (5), fixed pin (6), the 3rd sealed track (7), locking bed (8) and locking member (9), And retainer ring (1), spring (2), the first sealed track (3), sealing ring (4), the second sealed track (5), fixed pin (6), the 3rd Sealed track (7) is placed between external bushing 1 and high-pressure shaft 12；Wherein, retainer ring (1), spring (2), the first sealed track (3), the second sealed track (5) is sequentially connected, and sealing ring (4) is placed between the first sealed track (3) and the second sealed track (5) Gap, multiple fixed pins (6) fix the second sealed track (5) and are also placed in second in high-pressure shaft (12), and sealing ring (4) Between sealed track (5) and the 3rd sealed track (7), the 3rd sealed track (7) and locking bed (8) are sequentially connected, locking member (9) Locking bed (8) and high-pressure shaft (12) is fixed；Multiple bleed holes (41) are equipped with sealing ring (4), air-flow passes through bleed hole (41) air film is formed in the sealed track end face contacted with sealing ring (4).
- 2. contact floating air film between centers sealing structure according to claim 1, it is characterised in that sealing ring (4) is stone Ink material is made；Axis in the bleed hole (41) that sealing ring (4) is set is parallel with sealing ring (4) axis, and bleed hole (41) In sealing ring (4), radial direction is uniformly distributed.
- 3. contact floating air film between centers sealing structure according to claim 1, it is characterised in that on external bushing (11) The graphite of material identical with sealing ring (4) is scribbled with the position that sealing ring (4) contacts.
- 4. contact floating air film between centers sealing structure according to claim 1, it is characterised in that fixed pin (6) is three It is a, and it is distributed in the second sealed track (5) radially.
- 5. contact floating air film between centers sealing structure according to claim 1, it is characterised in that in the second sealed track (5) face contacted with sealing ring (4) is equipped with swivelling chute (51), is equipped with the 3rd sealed track (7) with the face that sealing ring (4) contacts Swivelling chute (51).
- 6. contact floating air film between centers sealing structure according to claim 1, it is characterised in that the first sealed track (3), the second sealed track (5) and the 3rd sealed track (7) are coordinated with high-pressure shaft (12) using small―gap suture, the small―gap suture x Scope be 0mm ＜ x≤0.065mm.
- 7. contact floating air film between centers sealing structure according to claim 1, it is characterised in that retainer ring (1) uses The metal material identical with high-pressure shaft (12) is made.
- 8. contact floating air film between centers sealing structure according to claim 1, it is characterised in that spring (2) is waveform Spring.
- 9. contact floating air film between centers sealing structure according to claim 1, it is characterised in that further include sealing ring (10), sealing ring (10) is placed in the groove of the 3rd sealed track (7).
- 10. a kind of installation method of contact floating air film between centers sealing structure as described in claim 1 to 9 is any, it is special Sign is, comprises the following steps1) first heat retainer ring (1) and be loaded into high pressure axle journal, be interference fitted between retainer ring (1) and high pressure axle journal；2) spring (2), the first sealed track (3), sealing ring (4) and the second sealed track (5) are sequentially placed into, is made in sealing ring Bleed hole (41) is directed at the swivelling chute (51) on the first sealed track, and the first sealed track (5) is fixed with fixed pin (6)；3) sealing ring (4) is put into, sealing ring (10) is put into the groove of the 3rd sealed track (7), is run afterwards with the 3rd sealing Road (7) props up sealing ring (4)；4) it is with locking member (9) that locking bed (8) and high-pressure shaft (12) is solid after propping up the 3rd sealed track (7) with locking bed (8) It is fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610621389.0A CN106065816B (en) | 2016-08-02 | 2016-08-02 | A kind of contact floating air film between centers sealing structure and installation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610621389.0A CN106065816B (en) | 2016-08-02 | 2016-08-02 | A kind of contact floating air film between centers sealing structure and installation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106065816A CN106065816A (en) | 2016-11-02 |
| CN106065816B true CN106065816B (en) | 2018-04-13 |
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| CN201610621389.0A Active CN106065816B (en) | 2016-08-02 | 2016-08-02 | A kind of contact floating air film between centers sealing structure and installation method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109612655B (en) * | 2018-12-10 | 2021-01-15 | 中国航发四川燃气涡轮研究院 | Inter-shaft seal dynamic test 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003343206A (en) * | 2002-05-21 | 2003-12-03 | Kawasaki Heavy Ind Ltd | Sealing method and sealing structure of gas turbine |
| CN103100970A (en) * | 2013-01-31 | 2013-05-15 | 西安工业大学 | Rotating sealing device capable of polishing with air |
| CN204371432U (en) * | 2014-12-10 | 2015-06-03 | 河南龙宇煤化工有限公司 | A kind of Turbine seal formula oil catch |
| CN204511526U (en) * | 2015-01-07 | 2015-07-29 | 中国航空动力机械研究所 | Seal arrangement |
| CN105422859A (en) * | 2014-09-17 | 2016-03-23 | 贵州航空发动机研究所 | Transmission shaft head end face sealing device |
-
2016
- 2016-08-02 CN CN201610621389.0A patent/CN106065816B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003343206A (en) * | 2002-05-21 | 2003-12-03 | Kawasaki Heavy Ind Ltd | Sealing method and sealing structure of gas turbine |
| CN103100970A (en) * | 2013-01-31 | 2013-05-15 | 西安工业大学 | Rotating sealing device capable of polishing with air |
| CN105422859A (en) * | 2014-09-17 | 2016-03-23 | 贵州航空发动机研究所 | Transmission shaft head end face sealing device |
| CN204371432U (en) * | 2014-12-10 | 2015-06-03 | 河南龙宇煤化工有限公司 | A kind of Turbine seal formula oil catch |
| CN204511526U (en) * | 2015-01-07 | 2015-07-29 | 中国航空动力机械研究所 | Seal arrangement |
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| Publication number | Publication date |
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| CN106065816A (en) | 2016-11-02 |
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