CN110242805A - On-board hydrogen system pipe joint sealing structure and fuel-cell vehicle - Google Patents
On-board hydrogen system pipe joint sealing structure and fuel-cell vehicle Download PDFInfo
- Publication number
- CN110242805A CN110242805A CN201810191339.2A CN201810191339A CN110242805A CN 110242805 A CN110242805 A CN 110242805A CN 201810191339 A CN201810191339 A CN 201810191339A CN 110242805 A CN110242805 A CN 110242805A
- Authority
- CN
- China
- Prior art keywords
- sealing ring
- hydrogen system
- sealing structure
- pipe joint
- board hydrogen
- 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
- 238000007789 sealing Methods 0.000 title claims abstract description 118
- 239000001257 hydrogen Substances 0.000 title claims abstract description 66
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 66
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 238000009434 installation Methods 0.000 claims abstract description 8
- 239000000446 fuel Substances 0.000 claims description 14
- 239000007789 gas Substances 0.000 abstract description 7
- 238000003754 machining Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 150000002431 hydrogen Chemical class 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
-
- 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
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
- F16L19/0212—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means
- F16L19/0218—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means comprising only sealing rings
-
- 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
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
- F16L19/025—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Fuel Cell (AREA)
Abstract
The present invention relates to a kind of on-board hydrogen system pipe joint sealing structure and fuel-cell vehicles.The on-board hydrogen system pipe joint sealing structure includes two pipe fittings, the end face of at least one pipe fitting is equipped with annular groove, sealing ring is installed in the sealing ring installation cavity surrounded between two pipe fittings by annular groove, the sealing ring has annular cavity, the radially inner side of sealing ring offers the opening being connected to annular cavity, and on-board hydrogen system pipe joint sealing structure further includes the fastener for compressing two pipe fittings in opposite directions.The on-board hydrogen system pipe joint sealing structure requires to be greatly lowered compared with cutting ferrule sealing means to the machining accuracy and mounting process of two pipe fittings, the high pressure gas being passed through inside pipe fitting can enter the inner cavity of sealing ring by the opening on sealing ring, high pressure gas into inner cavity generates enough tensile forces to sealing ring, it avoids sealing ring to fail because of excessive flexible deformation, is effectively guaranteed high pressure hydrogen sealing and does not reveal.
Description
Technical field
The present invention relates to a kind of on-board hydrogen system pipe joint sealing structure and fuel-cell vehicles.
Background technique
For fuel-cell vehicle mainly using hydrogen as energy source, predominant emissions are that water is true to zero environmental
New energy vehicle in positive meaning.Fuel-cell vehicle is an important directions of vehicle development as environmentally friendly vehicle.
On-board hydrogen system is storage and the feed system of fuel-cell vehicle fuel, since hydrogen molecule amount is minimum, is easy to spread and easy
Fire explosive, each tie point is a potential hydrogen leak point in vehicle-mounted hydrogen storage system, tie point sealing means it is reliable
Property directly affect the stability and reliability of vehicle-mounted hydrogen storage system, and further influence the safety of fuel-cell vehicle.
Existing fuel-cell vehicle includes fuel cell 6 and vehicle-mounted hydrogen storage system, as shown in Figure 1, vehicle-mounted hydrogen storage system packet
Hydrogen storage bottle 5 is included, valve, sensor, solenoid valve, pipe connecting piece etc. are installed on the connecting line between fuel cell 6 and hydrogen storage bottle 5
Part, these parts are formed by connecting by steel pipe by a large amount of cutting ferrule, threeway or straight coupling.To generally use in the market
The fuel battery passenger car of 8 hydrogen storage bottle groups or the on-board hydrogen system of bus for, on main line in total design have 91 companies
Contact 7, each tie point 7 include two pipe fittings, and two pipe fittings mostly use bite type to seal, forever by cutting ferrule and end
Deformation long forms hard sealing.
But machining accuracy and erector of the sealing means of the tie point of vehicle-mounted hydrogen storage system to part in the prior art
Skill requires height, and sealing means are complicated, with high costs, cannot reuse.
Summary of the invention
The purpose of the present invention is to provide a kind of on-board hydrogen system pipe joint sealing structure, fuel electricity in the prior art is solved
Machining accuracy and mounting process demanding problem of the sealing means of tie point on pond and hydrogen storage bottle connecting line to part；
The object of the invention is also to provide a kind of fuel-cell vehicles.
To achieve the above object, the technical solution of on-board hydrogen system pipe joint sealing structure of the present invention is: the on-board hydrogen system
Sealing structure under the overall leadership includes two pipe fittings, and the end face of at least one pipe fitting is equipped with annular groove, two pipe fittings
Between sealing ring is installed in the sealing ring installation cavity that is surrounded by annular groove, the sealing ring has annular cavity, sealing ring
Radially inner side offer the opening being connected to annular cavity, on-board hydrogen system pipe joint sealing structure further includes connecing two pipes
The fastener that head compresses in opposite directions.
The beneficial effect is that: machining accuracy and erector of the on-board hydrogen system pipe joint sealing structure to two pipe fittings
Skill requires to be greatly lowered compared with cutting ferrule sealing means, and when being passed through high pressure gas inside two pipe fittings, high pressure gas is to sealing
Circle generates radial active force and is far longer than the radial forces that atmosphere generates sealing ring, and it is airtight to be effectively guaranteed High Pressure Hydrogen
Envelope is not revealed, and high pressure gas enters the inner cavity of sealing ring by the opening on sealing ring, into the high pressure gas pair of inner cavity
Sealing ring generates enough tensile forces, avoids sealing ring and fails because of excessive flexible deformation.
The outer profile in the section of the sealing ring under natural conditions is arc-shaped.
The shape in the section of the annular cavity under natural conditions is arc-shaped.
The beneficial effect is that: the cross sectional shape of annular cavity is circle, and the high pressure gas into sealing ring inner cavity can be
Sealing ring provides more uniform tensile force.
One of them of described two pipe fittings is equipped with annular groove.
The depth of the annular groove is the 78% of sealing ring thickness.
The end of described two pipe fittings is equipped with collar flange, and the collar flange of one of pipe fitting is equipped with outer spiral shell
Line is arranged with the nut for being adapted to connection with the external screw thread on another pipe fitting, and the inner hole wall of nut, which is equipped with, to be used for
The block step that collar flange cooperates along axial block, the nut form the fastener.
The opening is the annular opening circumferentially extended along sealing ring.
The technical solution of fuel-cell vehicle of the present invention is: a kind of fuel-cell vehicle includes fuel cell and hydrogen storage bottle,
Pass through piping connection between fuel cell and hydrogen storage bottle, the tie point on pipeline includes two pipe fittings, at least one pipe fitting
End face be equipped with annular groove, sealing is installed in the sealing ring installation cavity surrounded between two pipe fittings by annular groove
Circle, the sealing ring have annular cavity, and the radially inner side of sealing ring offers the opening being connected to annular cavity, on-board hydrogen system
Sealing structure under the overall leadership further includes the fastener for compressing two pipe fittings in opposite directions.
The outer profile in the section of the sealing ring under natural conditions is arc-shaped.
The shape in the section of the annular cavity under natural conditions is arc-shaped.
One of them of described two pipe fittings is equipped with annular groove.
The depth of the annular groove is the 78% of sealing ring thickness.
The end of described two pipe fittings is equipped with collar flange, and the collar flange of one of pipe fitting is equipped with outer spiral shell
Line is arranged with the nut for being adapted to connection with the external screw thread on another pipe fitting, and the inner hole wall of nut, which is equipped with, to be used for
The block step that collar flange cooperates along axial block, the nut form the fastener.
The opening is the annular opening circumferentially extended along sealing ring.
Detailed description of the invention
Fig. 1 is the sealing structure signal of the tie point of the connecting line between fuel cell and hydrogen storage bottle in the prior art
Figure；
Fig. 2 is structural representation Fig. 1 of the embodiment 1 of on-board hydrogen system pipe joint sealing structure of the present invention；
Fig. 3 is structural representation Fig. 2 of the embodiment 1 of on-board hydrogen system pipe joint sealing structure of the present invention；
Fig. 4 is the decomposition chart of Fig. 3；
Fig. 5 is the partial enlarged view of A in Fig. 4；
Fig. 6 is the structural schematic diagram of the embodiment 5 of on-board hydrogen system pipe joint sealing structure of the present invention.
Description of symbols: 1. first pipe fittings；11. the first collar flange；2. the second pipe fitting；21. annular groove；
22. the second collar flange；3. nut；31. block step；4. sealing ring；41. annular cavity；42. annular opening；5. hydrogen storage bottle；
6. fuel cell；7. tie point.
Specific embodiment
Embodiments of the present invention are described further with reference to the accompanying drawing.
The embodiment 1 of on-board hydrogen system pipe joint sealing structure of the present invention, as shown in Figures 2 to 5, the on-board hydrogen system pipe
Sealing structure includes two pipe fittings, sealing ring 4 and nut 3.
Two pipe fittings are respectively the first pipe fitting 1 and the second pipe fitting 2, and the end face of the first pipe fitting 1 is equipped with annular
Groove 21, the depth of annular groove 21 are the 78% of 4 thickness of sealing ring.Annular groove 21 and the second pipe on first pipe fitting connect
First 2 end face surrounds sealing ring installation cavity, and sealing ring 4 is equipped in sealing ring installation cavity, and sealing ring 4 has annular cavity 41,
The radially inner side of sealing ring 4 offers the opening being connected to annular cavity 41, is open as along the annular of the circumferentially extending of sealing ring 4
Opening 42.
The outer profile in the section of sealing ring 4 under natural conditions is arc-shaped, the section of annular cavity 41 under natural conditions
Shape is arc-shaped.
The end of first pipe fitting 1 is equipped with the first collar flange 11, and the end of the second pipe fitting 2 is equipped with the second collar flange
22, the first collar flange 11 is equipped with external screw thread, and the nut 3 for being adapted to the external screw thread is arranged on the second pipe fitting 2,
The inner hole wall of nut 3 is equipped with the block step 31 for cooperating with the first collar flange 11 along axial block.
On-board hydrogen system pipe joint sealing structure of the present invention is packed into 1 end of the first pipe fitting when being sealed, by sealing ring 4
In annular groove 21 on face, nut 3 is set on the second pipe fitting 2 and is connected with the first collar flange 11 by screw threads for fastening
It connects, sealing ring 4 is pressed into annular groove 21, because the depth of annular groove 21 is the 78% of 4 thickness of sealing ring, sealing ring 4 is produced
22% axial elastic deformation is given birth to.The outer profile in 4 section of sealing ring is arc-shaped, and annular groove 21 is divided into interval A, interval
B, 41 5 parts of annular cavity of C, interval D and sealing ring 4 are spaced, also, are spaced in the annular of A, interval C and sealing ring 4
41 3 parts of chamber are connected to the channel inside pipeline, are spaced C and interval D is communicated with atmosphere.
When the piping connection between the fuel cell for applying the invention to fuel-cell vehicle and hydrogen storage bottle, tie point
The first pipe fitting 1 and the second pipe fitting 2 in be passed through high pressure hydrogen, due to sealing ring 4 generate 22% axial elastic deformation, sealing
The axial ends of circle 4 forms with the end face of the slot bottom of annular groove 21 and another pipe fitting seal respectively, generates resistance to hydrogen
Every contact surface leakage of the prevention hydrogen to interval B, interval D and the first pipe fitting 1 and the second pipe fitting 2, high pressure hydrogen passes through
The region of inner cavity three that the contact face of first pipe fitting 1 and the second pipe fitting 2 enters interval A, is spaced C and sealing ring 4, high pressure
Hydrogen generates radial active force to sealing ring 4 and is far longer than the radial forces that atmosphere generates sealing ring 4, effectively guarantees
High pressure hydrogen sealing is not revealed, and high pressure hydrogen enters sealing ring 4 inner cavity by the annular opening 42 on sealing ring 4, into
The high pressure hydrogen for entering inner cavity generates enough tensile forces to sealing ring 4, avoids sealing ring 4 and loses because of excessive flexible deformation
Effect.
On-board hydrogen system pipe joint sealing structure machining accuracy of the present invention and mounting process require big compared with cutting ferrule sealing means
Amplitude reduction, when maintenance, only need replacing sealing ring 4, and nut 3 is reusable, and maintenance cost is low.
The embodiment 2 of on-board hydrogen system pipe joint sealing structure of the present invention, difference from example 1 is that, first
Pipe fitting 1 and the second pipe fitting 2 pass through flanged joint.
The embodiment 3 of on-board hydrogen system pipe joint sealing structure of the present invention, difference from example 1 is that, sealing
The outer profile in the section of circle 4 is rectangle.
The embodiment 4 of on-board hydrogen system pipe joint sealing structure of the present invention, difference from example 1 is that, opening
41 being provided at circumferentially spaced along sealing ring.
The embodiment 5 of on-board hydrogen system pipe joint sealing structure of the present invention, difference from example 1 is that, such as Fig. 6
It is shown, annular groove is respectively provided in two pipe structures, two pipe fittings make two annular grooves surround sealing ring installation cavity in opposite directions.
In other embodiments, the cross sectional shape of inner cavity can be other shapes, for example, rectangle or regular polygon.
The embodiment of fuel-cell vehicle of the present invention, the fuel-cell vehicle include fuel cell and hydrogen storage bottle, fuel electricity
Pass through piping connection between pond and hydrogen storage bottle, the tie point on pipeline includes two pipe fittings, the sealing structure of two pipe fittings
It is identical as the structure of any embodiment of aforementioned present invention on-board hydrogen system pipe joint sealing structure, it is not repeated to illustrate.
Claims (10)
1. on-board hydrogen system pipe joint sealing structure, including two pipe fittings, it is characterised in that: the end face of at least one pipe fitting
It is equipped with annular groove, sealing ring is installed in the sealing ring installation cavity surrounded between two pipe fittings by annular groove, it is described
Sealing ring has annular cavity, and the radially inner side of sealing ring offers the opening being connected to annular cavity, and on-board hydrogen system pipe connects
Head sealing structure further includes the fastener for compressing two pipe fittings in opposite directions.
2. on-board hydrogen system pipe joint sealing structure according to claim 1, it is characterised in that: the sealing ring nature shape
The outer profile in the section under state is arc-shaped.
3. on-board hydrogen system pipe joint sealing structure according to claim 2, it is characterised in that: the annular cavity is natural
The shape in the section under state is arc-shaped.
4. on-board hydrogen system pipe joint sealing structure according to claim 1 or 2 or 3, it is characterised in that: described two pipes
One of them of connector is equipped with annular groove.
5. on-board hydrogen system pipe joint sealing structure according to claim 4, it is characterised in that: the depth of the annular groove
Degree is the 78% of sealing ring thickness.
6. on-board hydrogen system pipe joint sealing structure according to claim 1 or 2 or 3, it is characterised in that: described two pipes
The end of connector is equipped with collar flange, and the collar flange of one of pipe fitting is equipped with external screw thread, on another pipe fitting
It is arranged with the nut for being adapted to connection with the external screw thread, the inner hole wall of nut is equipped with for collar flange along axial block
The block step of cooperation, the nut form the fastener.
7. on-board hydrogen system pipe joint sealing structure according to claim 1 or 2 or 3, it is characterised in that: the opening is
Along the annular opening of sealing ring circumferentially extending.
8. a kind of fuel-cell vehicle, including fuel cell and hydrogen storage bottle pass through piping connection between fuel cell and hydrogen storage bottle,
Tie point on pipeline includes two pipe fittings, it is characterised in that: and the end face of at least one pipe fitting is equipped with annular groove, and two
Sealing ring is installed, the sealing ring has in annular in the sealing ring installation cavity surrounded between a pipe fitting by annular groove
Chamber, the radially inner side of sealing ring offer the opening being connected to annular cavity, and on-board hydrogen system pipe joint sealing structure further includes
The fastener for compressing two pipe fittings in opposite directions.
9. fuel-cell vehicle according to claim 8, it is characterised in that: the section of the sealing ring under natural conditions
Outer profile is arc-shaped.
10. fuel-cell vehicle according to claim 9, it is characterised in that: section of the annular cavity under natural conditions
The shape in face is arc-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810191339.2A CN110242805A (en) | 2018-03-08 | 2018-03-08 | On-board hydrogen system pipe joint sealing structure and fuel-cell vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810191339.2A CN110242805A (en) | 2018-03-08 | 2018-03-08 | On-board hydrogen system pipe joint sealing structure and fuel-cell vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110242805A true CN110242805A (en) | 2019-09-17 |
Family
ID=67882165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810191339.2A Pending CN110242805A (en) | 2018-03-08 | 2018-03-08 | On-board hydrogen system pipe joint sealing structure and fuel-cell vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110242805A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4056882A1 (en) * | 2021-03-11 | 2022-09-14 | Pratt & Whitney Canada Corp. | Multi-seal coupling for a hydrogen fuel system of a gas turbine engine and gas turbine engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3561793A (en) * | 1969-09-03 | 1971-02-09 | Temper Corp | Seal element and spacer member for use therewith |
| US3588131A (en) * | 1967-01-09 | 1971-06-28 | Corrugated Packing Sheet Metal | Sealing means |
| US3758123A (en) * | 1970-02-19 | 1973-09-11 | Parker Hannifin Corp | Omega seal |
| US4915397A (en) * | 1986-02-07 | 1990-04-10 | Specialist Sealing Limited | Hollow metallic sealing rings |
| US5118141A (en) * | 1989-12-07 | 1992-06-02 | Sanko Kogyo Kabushiki Kaisha | Union joint |
| US5354072A (en) * | 1989-12-19 | 1994-10-11 | Specialist Sealing Limited | Hollow metal sealing rings |
| US20030094768A1 (en) * | 2001-11-21 | 2003-05-22 | Takanobu Kamiya | Seal ring and seal structure at flange joint used for composite tanks and pipes |
| US20030123979A1 (en) * | 2001-12-28 | 2003-07-03 | Abdul-Azeez Mohammed-Fakir | Supplemental seal for the chordal hinge seals in a gas turbine |
| CN201103757Y (en) * | 2007-09-06 | 2008-08-20 | 攀枝花新钢钒股份有限公司 | Connector of pipe |
| US20120139235A1 (en) * | 2009-08-26 | 2012-06-07 | Satoru Koyanagi | Metal seal ring and duct apparatus using the metal seal ring |
| CN203036254U (en) * | 2012-12-19 | 2013-07-03 | 上海舜华新能源系统有限公司 | Online hydrogen supply system of emergency dynamo van based on fuel cell |
| US20160215886A1 (en) * | 2010-09-09 | 2016-07-28 | Technetics Group Llc | Annular Sealing Device |
| EP3208500A1 (en) * | 2016-02-22 | 2017-08-23 | Carl Freudenberg KG | Sealing structure |
| CN208169741U (en) * | 2018-03-08 | 2018-11-30 | 郑州宇通客车股份有限公司 | A kind of on-board hydrogen system pipe joint sealing structure and fuel-cell vehicle |
-
2018
- 2018-03-08 CN CN201810191339.2A patent/CN110242805A/en active Pending
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| US3588131A (en) * | 1967-01-09 | 1971-06-28 | Corrugated Packing Sheet Metal | Sealing means |
| US3561793A (en) * | 1969-09-03 | 1971-02-09 | Temper Corp | Seal element and spacer member for use therewith |
| US3758123A (en) * | 1970-02-19 | 1973-09-11 | Parker Hannifin Corp | Omega seal |
| US4915397A (en) * | 1986-02-07 | 1990-04-10 | Specialist Sealing Limited | Hollow metallic sealing rings |
| US5118141A (en) * | 1989-12-07 | 1992-06-02 | Sanko Kogyo Kabushiki Kaisha | Union joint |
| US5354072A (en) * | 1989-12-19 | 1994-10-11 | Specialist Sealing Limited | Hollow metal sealing rings |
| US20030094768A1 (en) * | 2001-11-21 | 2003-05-22 | Takanobu Kamiya | Seal ring and seal structure at flange joint used for composite tanks and pipes |
| US20030123979A1 (en) * | 2001-12-28 | 2003-07-03 | Abdul-Azeez Mohammed-Fakir | Supplemental seal for the chordal hinge seals in a gas turbine |
| CN201103757Y (en) * | 2007-09-06 | 2008-08-20 | 攀枝花新钢钒股份有限公司 | Connector of pipe |
| US20120139235A1 (en) * | 2009-08-26 | 2012-06-07 | Satoru Koyanagi | Metal seal ring and duct apparatus using the metal seal ring |
| US20160215886A1 (en) * | 2010-09-09 | 2016-07-28 | Technetics Group Llc | Annular Sealing Device |
| CN203036254U (en) * | 2012-12-19 | 2013-07-03 | 上海舜华新能源系统有限公司 | Online hydrogen supply system of emergency dynamo van based on fuel cell |
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| CN208169741U (en) * | 2018-03-08 | 2018-11-30 | 郑州宇通客车股份有限公司 | A kind of on-board hydrogen system pipe joint sealing structure and fuel-cell vehicle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4056882A1 (en) * | 2021-03-11 | 2022-09-14 | Pratt & Whitney Canada Corp. | Multi-seal coupling for a hydrogen fuel system of a gas turbine engine and gas turbine engine |
| US11655921B2 (en) | 2021-03-11 | 2023-05-23 | Pratt & Whitney Canada Corp. | Multi-seal coupling for a hydrogen fuel system of a gas turbine engine |
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