EP4493843A1 - Joint d'étanchéité comprenant une succession de zones avec et sans revêtement de matière anti-friction - Google Patents
Joint d'étanchéité comprenant une succession de zones avec et sans revêtement de matière anti-frictionInfo
- Publication number
- EP4493843A1 EP4493843A1 EP23713716.1A EP23713716A EP4493843A1 EP 4493843 A1 EP4493843 A1 EP 4493843A1 EP 23713716 A EP23713716 A EP 23713716A EP 4493843 A1 EP4493843 A1 EP 4493843A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- zone
- seal
- compartment
- coating
- waterproof material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/021—Sealings between relatively-stationary surfaces with elastic packing
- F16J15/022—Sealings between relatively-stationary surfaces with elastic packing characterised by structure or material
- F16J15/024—Sealings between relatively-stationary surfaces with elastic packing characterised by structure or material the packing being locally weakened in order to increase elasticity
- F16J15/027—Sealings between relatively-stationary surfaces with elastic packing characterised by structure or material the packing being locally weakened in order to increase elasticity and with a hollow profile
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/021—Sealings between relatively-stationary surfaces with elastic packing
- F16J15/022—Sealings between relatively-stationary surfaces with elastic packing characterised by structure or material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/064—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces the packing combining the sealing function with other functions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/064—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces the packing combining the sealing function with other functions
- F16J15/065—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces the packing combining the sealing function with other functions fire resistant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/102—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C7/00—Structures or fairings not otherwise provided for
- B64C7/02—Nacelles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D29/00—Power-plant nacelles, fairings or cowlings
- B64D29/06—Attaching of nacelles, fairings or cowlings
Definitions
- TITLE Seal comprising a succession of zones with and without coating of anti-friction material
- the present invention relates to a seal for a propulsion assembly, and more particularly a fire and fluid seal for a propulsion assembly.
- the propulsion assembly can for example be an assembly of the turbojet and nacelle type for the propulsion of aircraft.
- the invention applies to any field requiring the installation of a fluid-tight seal, the seal being capable of being substantially moved.
- Figure 1 shows in schematic section a nacelle 1 of a turbojet.
- the nacelle includes a thrust reverser 3 placed downstream, as well as a motor 5 positioned in the center of the nacelle on its longitudinal axis 7.
- Access to the engine 5 is via a first compartment 9, called the engine compartment. Access to said first compartment 9 is carried out in particular by opening a movable cover 11.
- the nacelle also includes a second compartment 13 juxtaposed to the first compartment 9 and comprising equipment for controlling the thrust reverser 3.
- the first compartment 9 includes pipes comprising flammable fluids. During a pipe burst type incident, the fluids are released into the first compartment 9 and are likely to ignite.
- the first compartment 9 and the equipment inside the first compartment 9 is also designed to resist in the event of fire, the first compartment 9 comprising for example automatic fire extinguishers.
- the released fluids are also drained outside through drainage holes, for example positioned in the movable cover 11.
- the second compartment 13 includes equipment which is not dimensioned to resist contact with the fluids of the first compartment 9, and even less to resist a fire in said second compartment 13.
- a fluid and fire seal 15 is therefore placed between these two compartments 9 and 13, one end of the seal being in particular in contact with the movable cover 11 when the latter is closed.
- FIG. 2 shows schematically a seal 15 fixed to a first element 17 and in contact with a second element 11, for example the movable cover 11.
- the seal separates for example a first compartment 9 and a second compartment 13.
- a coating of anti-friction material 19 is applied to the seal 15 to facilitate sliding contact between the seal 15 and the second element 11.
- the present invention therefore aims to overcome the aforementioned drawbacks and to provide a fire-tight and fluid-tight seal capable of preventing the passage of fluids by capillary action.
- the subject of the present invention is a seal configured to be placed between a first element and a second element of a propulsion assembly in an assembled configuration, the seal comprising a longitudinal sector intended to be in contact with the second element, the longitudinal sector being formed of a substantially elastic waterproof material and comprising, a first zone comprising a coating of anti-friction material, a second zone comprising a coating of waterproof material, and a third zone comprising a coating of anti-friction material.
- the seal is waterproof, is in frictionless sliding contact with the second element, and does not allow the passage by capillary action of a fluid at the level of the frictionless contact.
- the transverse width of the second zone is greater than or equal to 0.1 millimeter, preferably between 3 and 10 millimeters.
- the coating of anti-friction material is partially embedded in the waterproof material or covers the waterproof material.
- the coating of anti-friction material comprises a synthetic fiber, preferably poly(m-phenyleneisophtal amide).
- the longitudinal sector comprises at least a fourth zone comprising a coating of waterproof material and a fifth zone comprising a coating of anti-friction material.
- the waterproof material comprises a ceramic fabric and/or elastomer material.
- the seal comprises an “omega” type cross section comprising a first part substantially flat fixed to the first element and a second rounded part comprising the longitudinal sector.
- the second zone comprises a break dividing the second zone into two parts on either side of the break, the two parts being offset transversely.
- the present invention also relates to a propulsion assembly of an aircraft comprising a first compartment capable of being exposed to a fire and a second compartment, and comprising a seal as defined above between the first compartment and the second compartment , the second zone of the seal being preferably positioned at a distance from the second compartment less than its distance with the first compartment.
- the present invention also relates to an aircraft comprising a propulsion assembly as defined above and/or a joint as defined above.
- FIG 1 which has already been mentioned, is a schematic sectional view of a nacelle of a propulsion assembly of an aircraft according to the state of the art
- FIG 2 is a schematic sectional view of a seal according to the state of the art
- FIG 3B are schematic views respectively in section and in perspective of an embodiment of a seal according to the invention.
- FIG 4A and FIG 4B are schematic views respectively in section and in perspective of a first variant of the embodiment of the seal illustrated in Figures 3A and 3B;
- FIG 5B are schematic views respectively in section and in perspective of a second variant of the embodiment of the seal illustrated in Figures 3A and 3B;
- FIG 6 is a schematic perspective view of a third variant of the embodiment of the seal illustrated in Figures 3A and 3B;
- FIG 7 is a schematic perspective view of a fourth variant of the embodiment of the seal illustrated in Figures 3A and 3B.
- a first embodiment of a seal 23 according to the invention is shown schematically in Figures 3A and 3B.
- the seal 23 is configured to be disposed between a first element 17 and a second element 11 in an assembled configuration.
- the seal 23 has for example an elongated shape and comprises a cross section of type “Q” (omega) comprising a first substantially flat part 25 fixed to the first element 17 and a second part 27 rounded, and more particularly substantially tubular with a longitudinal direction which extends in the axis of this tube, a transverse direction extending perpendicular to the longitudinal direction.
- Q type “Q”
- the seal 23 can, however, have other shapes depending on its use.
- the first element 17 is for example a wall separating a first compartment 9 and a second compartment 13 and illustrated in Figure 1.
- the first compartment 9 gives access to an engine and is accessible from the outside via a movable cover and the second compartment 13 which is juxtaposed to the first compartment comprises equipment for controlling the thrust reverser of a nacelle of a turbojet.
- the joint 23 is fixed to the first element 17 and is intended to be positioned in contact with a second element 11 in assembled configuration.
- the second element 11 is for example the movable cover 11 mentioned in Figures 1 and 2.
- the seal 23 seals the first compartment 9 and the second compartment 13. More particularly, the seal 23 is fluid and fire-tight.
- the seal is for example included in a propulsion assembly of an aircraft.
- the second part 27 of the seal 23 is flexible, flexible and comprises a longitudinal sector 29 intended to be in contact with the second element 11.
- the longitudinal sector 29 is shown flat in the figures so that the seal 23 is shown in assembled configuration.
- the second part 11 of the seal 23, and consequently also the longitudinal sector 29, is formed in a substantially elastic waterproof material.
- the waterproof material comprises for example a ceramic fabric and/or elastomer material, for example silicone.
- Silicone ensures fluid tightness, and has a certain resistance to high temperatures, while its mechanical behavior is little dependent on temperature.
- the waterproof material includes glass fabric and/or carbon fabric and/or aramid fabric and/or boron fabric.
- Such materials just like ceramic fabrics in the broad sense, make it possible to provide a function of structural reinforcement of the joint 23 and fire-tightness.
- the longitudinal sector 29 comprises, arranged side by side, a first zone 31 comprising a coating of anti-friction material 19, a second zone 33 comprising a coating of waterproof material, and a third zone 35 comprising a coating of anti-friction material 19 .
- first zone 31 comprising a coating of anti-friction material 19
- second zone 33 comprising a coating of waterproof material
- third zone 35 comprising a coating of anti-friction material 19 .
- by coating of waterproof material is meant a wall which is on the surface of the joint 23 and intended to be in contact with the second element 1 1, this coating of waterproof material being formed by exposing the waterproof material of the longitudinal sector 29, for example by removing a layer of coating of anti-friction material, or being formed by adding a coating of waterproof material on a coating of anti-friction material positioned on the longitudinal sector, the coating of anti-friction material being used for the first and third zones 31 and 35.
- These three zones 31, 33 and 35 extend longitudinally over the longitudinal sector 29 from a first end to a second end (not shown).
- the three zones 31, 33 and 35 form transversely an alternation of zones comprising a coating of anti-friction material or a coating of waterproof material.
- anti-friction material 19 makes it possible to facilitate sliding contact between the seal 23 and the second element 11. It makes it possible in particular not to damage the seal 23 in the case of slight relative movements between the seal 23 and the second element 11.
- the coating of anti-friction material 19 comprises for example a synthetic fiber, preferably poly(m-phenyleneisophthalamide), more commonly called Nomex®.
- the coating of anti-friction material 19 is for example partially embedded in the waterproof material of the seal 23 and/or covers the waterproof material so as to create an overlayer.
- the second zone 33 does not include a coating of anti-friction material 19 so that a fluid 21 present in one of the two compartments 9 and 13, for example the first compartment 9, and moving by capillary action along the coating of anti-friction material 19 cannot pass through the second zone 33 and thus pass from one compartment to another.
- the second zone 33 has a transverse width equal to or greater than 0.1 millimeter.
- Figures 4A and 4B show a first variant of the embodiment illustrated in Figures 3A and 3B. In this variant, the first zone 31 is narrower than the third zone 35 so that the second zone 33 is closer to the second compartment 13 than to the first compartment 9.
- the first compartment 9 comprises a fluid 21 which can be ' infiltrate by capillarity or by the presence of deformations 37 in the joint 23.
- the deformations 37 being predominantly at the center of the joint 23, the positioning of the second zone 33 according to the variant illustrated in Figures 4A and 4B is favored in order to guarantee that the fluid does not pass from the first compartment 9 to the second compartment 13.
- Figures 5A and 5B show a second variant of the embodiment illustrated in Figures 3A and 3B.
- the longitudinal sector 29 comprises additional zones, namely a fourth zone 39 comprising a coating of waterproof material similar to the second zone 33 and a fifth zone 41 comprising a coating of anti-friction material 19 similar to the first zone 31, the fourth zone 39 and the fifth zone 41 extending longitudinally from a first end to a second end of the longitudinal sector 29.
- the first, second, third, fourth and fifth zones 31, 33, 35, 39 and 41 form an alternation of zones comprising a coating of anti-friction material or a coating of waterproof material. Additional areas can also be added.
- This variant is useful to ensure almost certainly that the movement by capillary action of the fluid 21 is indeed stopped, despite the presence of deformation 37 in the seal 23, deformations 37 into which fluid 21 could infiltrate.
- FIGS. 3A and 3B show a third variant of the embodiment illustrated in FIGS. 3A and 3B.
- the second zone 33 is not linear and its positioning evolves along the longitudinal sector 29.
- certain sections of the seal 23 can be subjected to fouling or to physical constraints more quickly than else.
- a positioning evolution of the second zone 33 makes it possible to prevent the second zone 33 from being positioned on certain edges of dirty sections which are likely to lose contact with the second element 1 1.
- the second zone 33 comprises at least one break 43 and is split into at least two parts at said break 43.
- the two parts separated by the break 43 are for example offset over the width of the seal 23 so that they are not aligned longitudinally.
- the two parts are preferably offset transversely and not longitudinally.
- the first and third zones 31 and 35 are then in contact with each other at the level of the break 43.
- the transverse movement of a fluid by capillarity remains limited by the second zone 33, which always extends over the entire length of the longitudinal sector 29 on either side of the break 43.
- This variant makes it possible to simplify the manufacture of the seal 23 and also makes it possible to position the second zone 33 on particular portions of the seal. sealing 23, so as to take into account the crushing or variable fouling of the seal on certain sections.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Sealing Devices (AREA)
- Gasket Seals (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2202340A FR3133655B1 (fr) | 2022-03-17 | 2022-03-17 | Joint d’étanchéité comprenant une succession de zones avec et sans revêtement de matière anti-friction |
| PCT/FR2023/050315 WO2023175258A1 (fr) | 2022-03-17 | 2023-03-08 | Joint d'étanchéité comprenant une succession de zones avec et sans revêtement de matière anti-friction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4493843A1 true EP4493843A1 (fr) | 2025-01-22 |
Family
ID=81648783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23713716.1A Pending EP4493843A1 (fr) | 2022-03-17 | 2023-03-08 | Joint d'étanchéité comprenant une succession de zones avec et sans revêtement de matière anti-friction |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20250215975A1 (fr) |
| EP (1) | EP4493843A1 (fr) |
| CN (1) | CN118974449A (fr) |
| FR (1) | FR3133655B1 (fr) |
| WO (1) | WO2023175258A1 (fr) |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU541318B2 (en) * | 1981-04-23 | 1985-01-03 | Kinugawa Rubber Industrial Co., Ltd. | Window sealing strip |
| FR2627835B1 (fr) * | 1988-02-26 | 1991-05-17 | Hutchinson | Coulisse d'etancheite de glace mobile, notamment de vitre de vehicule automobile |
| FR2631413B1 (fr) * | 1988-05-16 | 1991-01-25 | Hutchinson | Joint d'etancheite, notamment pour glace mobile de vehicule automobile |
| FR2633570B1 (fr) * | 1988-06-29 | 1991-04-12 | Hutchinson | Lecheur de bas de glace mobile de vehicule automobile |
| US5628150A (en) * | 1996-03-26 | 1997-05-13 | The Standard Products Company | Glass run channel with a composite reinforcement |
| US6286841B1 (en) * | 1998-12-30 | 2001-09-11 | Schlegel Corporation | Weather seal with reservoir structure |
| US20050129911A1 (en) * | 2003-12-12 | 2005-06-16 | Schlegel Corporation | Surface treated particulated polymeric matrix for forming an exposed surface of a weatherseal |
| DE102004050652A1 (de) * | 2004-10-18 | 2006-04-27 | Holger Forstner | Gleitdichtung für Fenster, Türen, Rolläden und dergleichen |
| FR2920215B1 (fr) * | 2007-08-20 | 2009-12-04 | Aircelle Sa | Joint d'etancheite a grande amplitude d'ecrasement |
| KR20130106547A (ko) * | 2012-03-20 | 2013-09-30 | 김창호 | 테프론 밴드 |
| CN104442611A (zh) * | 2013-09-20 | 2015-03-25 | 西川橡胶工业股份有限公司 | 防水用密封件以及使用了该防水用密封件的密封方法 |
| US10247021B2 (en) * | 2016-12-07 | 2019-04-02 | Rohr, Inc. | High temperature seals for blanketless inner fixed structure |
| FR3072908B1 (fr) * | 2017-10-26 | 2021-02-26 | Safran Nacelles | Ensemble propulsif pour aeronef |
| US20200240449A1 (en) * | 2018-05-30 | 2020-07-30 | The Boeing Company | Alignment-verifying sealable securing systems and methods |
-
2022
- 2022-03-17 FR FR2202340A patent/FR3133655B1/fr active Active
-
2023
- 2023-03-08 WO PCT/FR2023/050315 patent/WO2023175258A1/fr not_active Ceased
- 2023-03-08 US US18/847,976 patent/US20250215975A1/en active Pending
- 2023-03-08 EP EP23713716.1A patent/EP4493843A1/fr active Pending
- 2023-03-08 CN CN202380028145.XA patent/CN118974449A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US20250215975A1 (en) | 2025-07-03 |
| FR3133655B1 (fr) | 2024-03-08 |
| WO2023175258A1 (fr) | 2023-09-21 |
| FR3133655A1 (fr) | 2023-09-22 |
| CN118974449A (zh) | 2024-11-15 |
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