WO2024236246A1 - Bride de liaison fluide - Google Patents
Bride de liaison fluide Download PDFInfo
- Publication number
- WO2024236246A1 WO2024236246A1 PCT/FR2024/050607 FR2024050607W WO2024236246A1 WO 2024236246 A1 WO2024236246 A1 WO 2024236246A1 FR 2024050607 W FR2024050607 W FR 2024050607W WO 2024236246 A1 WO2024236246 A1 WO 2024236246A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wall
- fluid connection
- connection flange
- solid
- filling portion
- 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.)
- Ceased
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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/032—Flanged joints the flanges being connected by members tensioned axially characterised by the shape or composition of the flanges
Definitions
- the present disclosure relates to a fluid connection flange for rigidly and tightly connecting a hydraulic component such as a pipeline, a reservoir, a rotating machine or any other hydraulic equipment.
- Such a fluid connection flange can in particular be used in the space or aeronautical field, for example within a rocket engine or a supply line of a space launcher. It can concern any type of fluid, gas or liquid, and in particular a propellant such as liquid hydrogen or liquid oxygen.
- the known metal flanges are very thick and provided with a large number of bolts to enable them to withstand all these constraints while ensuring a sufficient level of compression of the metal joints.
- the present disclosure relates to a fluid connection flange, comprising a first solid wall, forming a bearing surface intended to be applied against a fixing surface, a second solid wall, provided opposite the first wall, at least one solid, cylindrical spacer, extending perpendicularly between the first and second walls, forming a passage intended to allow the passage of a rod of a fixing member, and a gapped filling portion extending between the first wall and the second wall, outside the spacers, in which the first wall, the second wall, said at least one spacer and the filling portion are produced jointly and integrally by an additive manufacturing technique.
- the filling portion is directly connected to the first and second walls and that it comprises gaps, i.e. voids, preferably macroscopic, distributed throughout the filling portion.
- gaps i.e. voids, preferably macroscopic, distributed throughout the filling portion.
- the bearing surface intended to be applied against the fixing surface remains full, as well as the rear surface against which the heads of the fixing members will be tightened.
- the spacers, rigidly connecting the two walls are provided at the level of the fixing members to ensure the mechanical strength of the flange against the axial compression forces of the members fixing and thus prevent crushing of the flange and therefore a release of the compressive forces holding it firmly applied against the fixing surface.
- a gasket is provided at the flange, the latter remains suitably compressed, which maintains a satisfactory level of sealing.
- this structure allows, like a sandwich panel, to obtain a high bending moment of inertia, reducing the risk of deformation of the flange between the fixing members.
- the filling portion is sufficient to maintain the spacing between the first and second walls in the least loaded areas of the flange.
- the first wall is planar. This configuration is particularly suitable when the fixing surface against which the flange is applied is planar.
- the first wall is annular. This configuration is particularly suitable when the fluid connection interface is circular.
- the second wall is planar.
- the second wall is annular.
- the second wall is parallel to the first wall.
- the thickness of the second wall is between 50% and 200% of the thickness of the first wall, preferably substantially equal to the thickness of the first wall.
- the gap between the first wall and the second wall is constant. This gap is measured perpendicular to the first wall.
- the gap between the first wall and the second wall is at least 300%, preferably at least 500%, of the thickness of the first wall. This increases the bending moment of inertia of the flange.
- the flange comprises several spacers.
- a spacer is thus preferably provided for each fixing member. They can be regularly spaced along the first wall, in particular in the circumferential direction when the flange is annular. They can be located on the same diameter of the flange when the latter is annular.
- the thickness of said at least one spacer is at least equal to the thickness of the first wall. However, it may be strictly greater and, in particular, at least equal to 150% of the thickness of the first wall. Such a thickness makes it possible to satisfactorily withstand the axial stresses imposed by the fixing members.
- the void rate of the filling portion is at least equal to 20%, preferably at least equal to 50%, preferably at least equal to 80% or even at least equal to 90%.
- void rate is meant here the ratio between the cumulative volume of the voids included in the filling portion on the total volume occupied by the filling portion.
- the filling portion has a cellular, columnar or lattice structure. This structure may be regular or not, in geometry and/or in size of the gaps.
- the filling portion occupies at least 50%, preferably at least 80%, more preferably at least 90% of the volume defined between the first and second walls, outside each spacer. This helps to maintain the spacing of the two walls throughout the flange.
- the flange comprises a notch formed in the bearing surface. Such a notch may be useful for placing an accessory in the flange, for example a seal. Such a notch may in particular be formed by the local interruption of the first wall, for example at its internal end. The notch may also be partially formed by a recess in the filling portion.
- the flange comprises a seal installed in said notch formed in the bearing surface. It may in particular be an O-ring, or a seal having a C- or V-shaped cross-section, the latter allowing for greater elasticity and, therefore, ensuring a greater force to promote sealing, during movements of the interfaces.
- This seal may in particular be made of stainless steel or Inconel.
- the flange comprises a solid reinforcing wall extending from the second wall to the first wall, perpendicular to the second wall.
- This reinforcing wall makes it possible to locally reinforce the flange against axial forces, for example at right angles to a seal located in said flange or opposite in the fixing surface.
- This reinforcing wall may extend to the first wall or stop before reaching the latter.
- said reinforcing wall extends to said notch formed in the bearing surface. In such a case, the distal end of the reinforcing wall forms a portion of the bottom of the notch.
- the thickness of the reinforcing wall is at least equal to 100%, preferably at least equal to 200%, of the thickness of the first wall. This makes it possible to effectively resist axial compressive forces.
- the flange comprises, at least along one edge of the first wall, a solid closure wall extending from said edge of the first wall toward the second wall.
- a closure wall is particularly useful when a fluid flows along this edge in order to at least partially mask the gap filling portion with a smooth surface in order to reduce the risk of disturbing the flow.
- This closure wall closure may extend to the edge of the second wall in order to completely hide the filling portion at this location, or may stop before the second wall, particularly in the presence of a notch.
- a closure wall extends at least along the inner edge of the first wall.
- At least one dust removal hole is provided in the closure wall. Such a dust removal hole allows for the evacuation of unsolidified material corresponding to the gaps in the filling portion at the end of the additive manufacturing.
- the filling portion opens along the outer edge of the first wall.
- no closing wall is provided along the outer edge.
- such a closing wall is superfluous: its absence on the contrary makes it possible to reduce the mass and to allow the dust removal of the filling portion at the end of the additive manufacturing.
- the flange comprises a solid useful wall extending from the second wall, opposite the first wall.
- This wall may for example be the peripheral wall of a pipeline or the casing of a hydraulic member.
- the useful wall extends perpendicular to the second wall.
- the useful wall extends from an edge of the second wall, preferably from its inner edge.
- the useful wall is cylindrical.
- the thickness of the first wall is between 50% and 100%, preferably between 60 and 80%, of the thickness of the useful wall.
- the flange comprises a solid transition wall extending obliquely between the second wall and the useful wall. This facilitates the transmission of forces to the interface between the useful wall and the flange, which reduces the phenomenon of stress concentration at this interface.
- the thickness of the transition wall is between 50% and 100% of the thickness of the useful wall.
- the angle formed between the transition wall and the second wall is between 30 and 60°, preferably between 40 and 50°. Such angles facilitate the transmission of forces.
- a second filling portion is provided in the volume defined between the useful wall, the transition wall and the second wall.
- this second filling portion occupies at least 50%, preferably at least 80%, more preferably at least 90%, of the volume defined between the useful wall, the transition wall and the second wall.
- At least one dust removal hole is provided in the transition wall.
- the flange is made of metal, preferably selected from the group consisting of nickel-based alloys, aluminum-based alloys, titanium-based alloys and steels.
- the housing may in particular be made of Inconel, in particular Inconel 625 or Inconel 718 (registered trademarks).
- an alloy is considered to be based on a given element when this element is the main element in the composition of this alloy, advantageously when this element is present in a content greater than the other components, even more advantageously in a content of at least 50% in molar percentage, even more advantageously of at least 60% in molar percentage.
- the present disclosure also relates to a mechanical part, comprising a fluid connection flange according to any of the preceding embodiments. It may in particular be a pipe, a tank, a pump, a turbine, an exchanger, a combustion chamber or any other hydraulic equipment.
- Figure 1 is an axial sectional view of two pipes connected to each other using fluid connection flanges.
- Figure 2 shows a view of a fluid connection flange along plane B-B of Figure 1.
- Figure 1 shows, in section along a plane passing their main axis A, a first pipe 1 and a second pipe 1’ assembled one in the extension of the other so as to ensure the continuity of their flow.
- These lines 1 and 1' may in particular be lines of a propellant supply line of a rocket engine.
- the fluid circulating in these lines 1 and 1' may in particular be a cryogenic propellant such as liquid hydrogen or liquid oxygen.
- this fluid may have a temperature of the order of 20K and a pressure of the order of 200 to 300 bar.
- Each pipe 1, 1' comprises a cylindrical peripheral wall 10, 10', defining a vein 11, 11' for the flow of the fluid, and a fluid connection flange 20, 20' making it possible to mechanically and fluidically connect the pipes 1, 1' so that the veins 11, 11' extend in continuity with one another while ensuring the sealing of the flow at the interface between the flanges 20, 20'.
- Each fluid connection flange 20 comprises a first wall 21 and a second wall 22, flat, parallel and facing each other. They extend radially relative to the main axis A, therefore perpendicular to the peripheral wall 10 of the pipe 1 which can also be considered as a useful wall of the flange 10 within the meaning of the present disclosure.
- the second wall 22 therefore extends radially outwards from the end of the peripheral wall 10.
- Each fluid connection flange 20 also comprises a plurality of cylindrical spacers 23 extending axially between the first wall 21 and the second wall 22, rigidly connecting the latter to each other.
- Each spacer 23 forms a cylindrical passage 24 opening onto the surface of the first wall 21 and the second wall 22 so as to allow the rod 3a of a connection member 3 to pass through.
- the spacers 23 are regularly distributed over a diameter D23 of the flange 20 centered around the main axis A.
- the first wall 21 forms a bearing surface 21a intended to be applied against a fixing surface, here the bearing surface 21a’ of the fluid connection flange 20’ of the opposite pipe 1’.
- the bearing surfaces 21 a, 21 a’ of the fluid connection flanges 20, 20’ of each pipe 1, 1’ are therefore attached to each other and connection members, here bolts 3, are inserted into the passages 24 of the spacers 23 so as to firmly hold the flanges 20, 20’ against each other, the head 3b of the rod 3a and the nut 3c of each bolt 3 pressing against the seat surface 22a, 22a’ formed by the second wall 22, 22’ of each flange 20, 20’, at right angles to the spacers 23, 23’.
- Each fluid connection flange 20 also comprises a transition wall 25 extending obliquely between the second wall 22 and the peripheral wall. 10: this transition wall 25 is therefore truncated cone-shaped in its entirety.
- the fluid connection flange 20 of the first pipe 1, that is to say of the upper pipe in FIG. 1, further comprises a closing wall 26, cylindrical and axial, extending between the first wall 21 and the second wall 22 in the extension of the peripheral wall 10, thus extending the vein 11 without discontinuity.
- the fluid connection flange 20 of the first pipe 1, that is to say of the upper pipe in FIG. 1, further comprises a cylindrical and axial reinforcing wall 27, extending between the first wall 21 and the second wall 22 concentrically with the axis A.
- This reinforcing wall 27 extends along a diameter D27 between the diameter D11 of the vein 11 and the diameter D23 of the spacers 23. The function of this reinforcing wall 27 will be explained a little later.
- All of the walls mentioned above are solid and made of metal, preferably stainless steel, Inconel, titanium or aluminum alloy.
- the volume located between the peripheral wall 10, the second wall 22 and the transition wall 25 forms another filling portion 32 occupied by the same gap filling material.
- the filling portions 31, 32 are made of the same material as the solid walls of the fluid connection flange 20. More precisely, all of the solid walls mentioned 1, 21, 22, 23, 25, 26, 27, as well as the filling potions 31, 32, are produced simultaneously during the same additive manufacturing step.
- the fluid connection flange 20’ of the second pipe 1’ is completely identical to that of the first pipe 1 except that it comprises a notch 40 in which an O-ring 41 is installed, the latter here being metallic.
- the structure of the flange 20’ of the second pipe 1’ is therefore identical to that of the flange 20 of the first pipe 1 except that the first wall 21’ does not extend to the vein 11’ and that the closing wall 26’ and the reinforcing wall 27’ do not extend to the first wall 21’ so as to form the notch 40. Similarly, the volume of the notch 40 is excluded from the filling portion 31’.
- the seal 41 is positioned at the diameter D27, i.e. at the reinforcing wall 27’, the distal end of the latter being in contact with the seal 41 .
- the seal 41 is placed in compression between the reinforcing wall 27’ of the flange 20’ of the lower pipe 1’ and the bearing surface 21a of the flange 20 of the upper pipe 1 , at the level of the reinforcing wall 27 of the latter.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
- Vehicle Body Suspensions (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP24731046.9A EP4710029A1 (fr) | 2023-05-12 | 2024-05-07 | Bride de liaison fluide |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FRFR2304748 | 2023-05-12 | ||
| FR2304748A FR3148635B1 (fr) | 2023-05-12 | 2023-05-12 | Bride de liaison fluide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024236246A1 true WO2024236246A1 (fr) | 2024-11-21 |
Family
ID=87974277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2024/050607 Ceased WO2024236246A1 (fr) | 2023-05-12 | 2024-05-07 | Bride de liaison fluide |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4710029A1 (fr) |
| FR (1) | FR3148635B1 (fr) |
| WO (1) | WO2024236246A1 (fr) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1508968A (en) * | 1976-01-23 | 1978-04-26 | Stuebbe Armaturen Kg | Reinforced flange |
| EP0878644A1 (fr) * | 1997-05-13 | 1998-11-18 | Vicente Cunat Martinez | Flasque adaptable à plusieurs diamètres |
| KR101113814B1 (ko) * | 2011-06-10 | 2012-03-02 | 유옥수 | 안전 연결형 상하수도관 |
-
2023
- 2023-05-12 FR FR2304748A patent/FR3148635B1/fr active Active
-
2024
- 2024-05-07 EP EP24731046.9A patent/EP4710029A1/fr active Pending
- 2024-05-07 WO PCT/FR2024/050607 patent/WO2024236246A1/fr not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1508968A (en) * | 1976-01-23 | 1978-04-26 | Stuebbe Armaturen Kg | Reinforced flange |
| EP0878644A1 (fr) * | 1997-05-13 | 1998-11-18 | Vicente Cunat Martinez | Flasque adaptable à plusieurs diamètres |
| KR101113814B1 (ko) * | 2011-06-10 | 2012-03-02 | 유옥수 | 안전 연결형 상하수도관 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4710029A1 (fr) | 2026-03-18 |
| FR3148635A1 (fr) | 2024-11-15 |
| FR3148635B1 (fr) | 2025-05-09 |
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