CN203517310U - Sealing structure for high-pressure composite cylinder - Google Patents
Sealing structure for high-pressure composite cylinder Download PDFInfo
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- CN203517310U CN203517310U CN201320551236.5U CN201320551236U CN203517310U CN 203517310 U CN203517310 U CN 203517310U CN 201320551236 U CN201320551236 U CN 201320551236U CN 203517310 U CN203517310 U CN 203517310U
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- end socket
- sealing configuration
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- tube nozzle
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Abstract
The utility model discloses a sealing structure for a high-pressure (35MPa) composite cylinder. The sealing structure (14) comprises a cylinder seal head (1) and a filler neck (2), wherein an axial sealing structure of a metal gasket (10) is arranged on one side of a connection thread (3) for connecting the cylinder seal head (1) and the filler neck (2); a radial sealing structure of a retain ring (11) and a rubber O-shaped ring (9) is arranged on the other side of the connection thread (3) for connecting the cylinder seal head (1) and the filler neck (2). The sealing structure (14) solves the reliability and sealing problem of the connection part of the cylinder seal head (1) and the filler neck (2) under the wide temperature range (100-373K) operating condition, the temperature change origins from the rapid change of the temperature on a mouth of the cylinder during the air filling process and the air discharging process. The sealing structure ensures that the leak rate of the connection part of the cylinder seal head (1) and the filler neck (2) is not larger than 1x10-5Pa.m3/s, when the air filling and air charging times of the cylinder are not lower than 100.
Description
Technical field
The utility model belongs to technical field of sealing technology, relates generally to a kind of sealing technique of high-pressure composite gas cylinder, relates in particular to the composite cylinder sealing configuration and the sealing material that under the wide temperature range working condition with higher reliability requirement, use.
Background technique
Along with the progress of metal machine shaping technology and the development of composite technology, current aluminium alloy lining is wound around the composite cylinder of the reinforcing fiber of impregnation outward, lightweight owing to having, leak prior to features such as explosions, in civilian particularly military domain, extensively adopt.
Traditional gas cylinder (industrial helium tank, oxygen cylinder etc.) adopts forced sealing structure conventionally one, by link, realizes sealing with direct contact of bottleneck.This seal form easily forms damage to bottle sealing face, causes use and maintainable decline of gas cylinder; On the other hand owing to only having one sealing, at shock and vibration environment, operating temperature sharply under change condition the risk of its seal failure also larger.By investigation, what at present no matter the composite cylinder of home or overseas all adopted is a seal structures, some employing metallic shims, some employing rubber washers.Seal failure adopts a seal structures, if may cause serious leakage.
Gas cylinder at other civil area also has the sealing configuration that adopts twice 0 shape rubber seal, as disclosed a kind of gas cylinder sealing configuration in US Patent specification US7971852B2, two O shape rubber seal series connection have been adopted, two 0 shape circles adopt different rubber materials, adapt to respectively the working condition of low temperature and hot environment.But due to the material reason of rubber packing material, its resistance to low temperature is not as good as metal sealing material, so the also restriction to some extent of its low temperature usability.
Under special usage requirement, composite cylinder need to be through quick inflation/deflation repeatedly, and the limit high temperature that inflation forms reaches 373K, and venting forms limit low temperature and reaches 100K, and limiting temperature operating mode is all created in gas cylinder end socket place; Due to liner flow forming and molding process, the physical dimension of end socket is limited, and end socket is the key position of gas cylinder sealing, therefore need to be in limited space by rational design of Sealing Structure to meet wide temperature range, the usage requirement of high reliability.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of composite cylinder sealing configuration that can use under the wide temperature range working condition of higher reliability requirement.This composite cylinder design of Sealing Structure metallic gasket axial seal and rubber o-ring radial seal double-channel sealing structure; Material selection aspect, rubber material and metallic material are selected rubber and the softer metals with respective range heat resistance according to applying working condition; Structural design aspect, metal sealing adopts plain cushion structure, and seal groove has adopted step trough form, and rubber o-ring has increased the ring washer that anti-high pressure is extruded.
The utility model discloses a kind of for the high-pressure composite gas cylinder sealing configuration under wide temperature range condition.Described sealing configuration comprises: end socket, and connecting-tube nozzle, the connecting thread of end socket and connecting-tube nozzle, and the metallic gasket axial seal structure of connecting thread one side, connecting thread opposite side is equipped with the radial seal structure of ring washer and rubber o-ring; It is characterized in that: the top of described gas cylinder end socket has place's step trough, the mid-metallic gasket that is placed with of step trough, connecting-tube nozzle has place's step trough, and has formed enclosed slot structure after the step trough combination of end socket; The step trough plane of described end socket and connecting-tube nozzle all has a little triangular groove, and the length of side is 0.3～0.5mm; Connecting-tube nozzle is connected with gas cylinder end socket by screw thread, and the coupling torque of its screw thread is 150～350Nm; Circular groove together with having towards one section that extends in bottle under the screw thread that connecting-tube nozzle and end socket connect, seal groove for assembling ring washer and rubber o-ring, the decrement of this rubber seal is 15%～35%, and bottom blocking cap is connected with connecting-tube nozzle by screw thread, and the coupling torque of its screw thread is 50～85Nm; Described end socket outside diameter is at φ 45mm～60mm.
High-pressure composite gas cylinder sealing configuration as above, the rubber o-ring material described in it is silicone rubber or neoprene.
High-pressure composite gas cylinder sealing configuration as above, the ring washer material described in it is the rare or polychlorotrifluoroethylene of perfluoroethylene third.
High-pressure composite gas cylinder sealing configuration as above, the metal sealing cushion material described in it is copper or mild steel.
High-pressure composite gas cylinder sealing configuration as above, the end socket described in it is aluminum alloy material, connecting-tube nozzle is stainless steel material.
The beneficial effects of the utility model are:
High-pressure composite gas cylinder sealing configuration described in the utility model, adopted the double-channel sealing structure form of the form that is threaded, end socket outside adopts step trough and soft metal sealing gasket axial seal, inner side adopts rubber o-ring radial seal, solved the reliable sealing problem of the gas cylinder under wide temperature range (100～373K) working condition, described temperature variation comes from the quick variation of gas cylinder bottleneck temperature in inflation and deflation course, while wherein inflating, temperature reaches 373K, and during venting, temperature decrease is to 100K.
The utility model has carried out above-mentioned sealing configuration the wide temperature range of-196～100 ℃, under 35MPa working pressure condition, by the sealing simulation certification test of limit low temperature-limit high temperature iterative cycles 100 times, test result shows that sealing configuration leak rate is not more than 1 * 10-5Pa.m
3/ s (normal temperature helium).
Accompanying drawing explanation
Fig. 1 is composite cylinder double-channel sealing structure sectional drawing;
Fig. 2 is the amplification profile of metal sealing pad mounting structure in double-channel sealing structure;
Fig. 3 is the amplification profile of ring washer and rubber o-ring mounting structure in double-channel sealing structure;
As shown in Fig. 1 to 2: 1-gas cylinder end socket, 2-connecting-tube nozzle, 3-connecting thread, 4-end socket one side steps groove, 5-connecting-tube nozzle one side steps groove, 6,7-triangular groove, 8-seal groove, 9-blocking cap, 10-metallic gasket, 11-ring washer, 12-rubber o-ring, 13-connecting thread.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Embodiment 1:
As shown in Figure 1, a kind of high-pressure composite gas cylinder sealing configuration for using under wide temperature range condition, wherein connecting-tube nozzle 2 is connected with gas cylinder end socket 1 by connecting thread 3.The material of gas cylinder end socket is 5AO6, and the outside diameter of end socket is φ 52mm; The material of connecting-tube nozzle is OCr18Ni9, and the specification of connecting thread is M30 * 1.5.
As shown in Figure 2, on the top of gas cylinder end socket 1, have a step-like seal groove in place, to one section that extends in the bottle screw thread for being connected with connecting-tube nozzle, connecting-tube nozzle 2 has place's step slot too, with after the step slot combination of end socket, formed enclosed slot structure, the width of step slot is 3.5mm, is the seal groove of assembling metallic gasket, places therein the copper sealing gasket 4 matching with its shape.The step trough plane of described end socket and connecting-tube nozzle all has a little triangular groove, and the length of side is 0.35mm.
As shown in Figure 3, circular groove together with having towards one section that extends in bottle under the connecting thread of connecting-tube nozzle 2 and end socket, the degree of depth of groove is 2.1mm, seal groove for assembling ring washer 11 and rubber o-ring 12, place therein the rare ring washer of perfluoroethylene third and φ 2.65 silicone rubber O shape circles, the decrement of this rubber o-ring is 20%.
The above-mentioned assembly process for the high-pressure composite gas cylinder sealing configuration that uses under wide temperature range condition is as follows: the step slot that copper sealing gasket (upper and lower end face evenly applies a small amount of lubricating grease) is installed on to end socket, the rare ring washer of perfluoroethylene third and silicone rubber O shape circle (surface uniform of rubber o-ring applies a small amount of lubricating grease) are installed in the seal groove 8 of connecting-tube nozzle successively, blocking cap 9 is connected by screw thread 13 with connecting-tube nozzle 2, with the moment of 65Nm, tightens blocking cap 9.Finally connecting-tube nozzle 2 is connected with end socket by screw thread 3, with the moment of 250Nm, tightens connecting-tube nozzle 2.
For the double-channel sealing structure of above-mentioned assembling, the sealing simulation certification test under 35MPa working pressure condition, by-196 ℃ of limit low temperature-100 ℃ limit high temperature through circulation 100 times, test result shows that sealing configuration leak rate is not more than 1 * 10-5Pa.m
3/ s (normal temperature helium).
Embodiment 2:
As shown in Figure 1, a kind of high-pressure composite gas cylinder sealing configuration for using under wide temperature range condition, wherein connecting-tube nozzle 2 is connected with gas cylinder end socket 1 by connecting thread.The material of gas cylinder end socket is 5AO6, and the outside diameter of end socket is φ 45mm; The material of connecting-tube nozzle is OCr18Ni9, and the specification of connecting thread is M27 * 1.5.
As shown in Figure 2, on the top of gas cylinder end socket 1, have a step-like seal groove in place, to one section that extends in the bottle screw thread for being connected with connecting-tube nozzle, connecting-tube nozzle 2 has place's step slot too, with after the step slot combination of end socket, formed enclosed slot structure, the width of step slot is 3mm, is the seal groove of assembling metallic gasket, places therein the copper sealing gasket 4 matching with its shape.The step trough plane of described end socket and connecting-tube nozzle all has a little triangular groove, and the length of side is 0.3mm.
As shown in Figure 3, circular groove together with having towards one section that extends in bottle under the connecting thread of connecting-tube nozzle 2 and end socket, the degree of depth of groove is 1.65mm, seal groove for assembling ring washer 11 and rubber o-ring 12, place therein polychlorotrifluoroethylene ring washer and φ 2.2 neoprene O shape circles, the decrement of this rubber o-ring is 25%.
The above-mentioned assembly process for the high-pressure composite gas cylinder sealing configuration that uses under wide temperature range condition is as follows: the step slot that copper sealing gasket (upper and lower end face evenly applies a small amount of lubricating grease) is installed on to end socket, polychlorotrifluoroethylene ring washer and neoprene O shape circle (surface uniform of rubber o-ring applies a small amount of lubricating grease) are installed in the seal groove 8 of connecting-tube nozzle successively, blocking cap 9 is connected by screw thread 13 with connecting-tube nozzle 2, with the moment of 50Nm, tightens blocking cap 9.Finally connecting-tube nozzle 2 is connected with end socket by connecting thread 3, with the moment of 230Nm, tightens connecting-tube nozzle 2.
For the double-channel sealing structure of above-mentioned assembling, the sealing simulation certification test under 35MPa working pressure condition, by-196 ℃ of limit low temperature-100 ℃ limit high temperature through circulation 100 times, test result shows that sealing configuration leak rate is not more than 1 * 10-5Pa.m
3/ s (normal temperature helium).
Embodiment 3:
As shown in Figure 1, a kind of high-pressure composite gas cylinder sealing configuration for using under wide temperature range condition, wherein connecting-tube nozzle 2 is connected with gas cylinder end socket 1 by connecting thread.The material of gas cylinder end socket is 5AO6, and the outside diameter of end socket is φ 50mm; The material of connecting-tube nozzle is OCr18Ni9, and the specification of connecting thread is M30 * 1.5.
As shown in Figure 2, on the top of gas cylinder end socket 1, have a step-like seal groove in place, to one section that extends in the bottle screw thread for being connected with connecting-tube nozzle, connecting-tube nozzle 2 has place's step slot too, with after the step slot combination of end socket, formed enclosed slot structure, the width of step slot is 3.5mm, is the seal groove of assembling metallic gasket, places therein the mild steel sealing gasket 4 matching with its shape.The step trough plane of described end socket and connecting-tube nozzle all has a little triangular groove, and the length of side is 0.5mm.
As shown in Figure 3, circular groove together with having towards one section that extends in bottle under the connecting thread of connecting-tube nozzle 2 and end socket, the degree of depth of groove is 2.1mm, seal groove for assembling ring washer 11 and rubber o-ring 12, place therein the rare ring washer of perfluoroethylene third and φ 2.65 silicone rubber O shape circles, the decrement of this rubber o-ring is 20%.
The above-mentioned assembly process for the high-pressure composite gas cylinder sealing configuration that uses under wide temperature range condition is as follows: the step slot that mild steel sealing gasket (upper and lower end face evenly applies a small amount of lubricating grease) is installed on to end socket, the rare ring washer of perfluoroethylene third and silicone rubber O shape circle (surface uniform of rubber o-ring applies a small amount of lubricating grease) are installed in the seal groove 8 of connecting-tube nozzle successively, blocking cap 9 is connected by screw thread 13 with connecting-tube nozzle 2, with the moment of 65Nm, tightens blocking cap 9.Finally connecting-tube nozzle 2 is connected with end socket by screw thread 3, with the moment of 350Nm, tightens connecting-tube nozzle 2.
For the double-channel sealing structure of above-mentioned assembling, the sealing simulation certification test under 35MPa working pressure condition, by-196 ℃ of limit low temperature-100 ℃ limit high temperature through circulation 100 times, test result shows that sealing configuration leak rate is not more than 1 * 10-5Pa.m
3/ s (normal temperature helium).
In conjunction with the accompanying drawings and embodiments the present invention be have been described in detail above; the present invention is not limited to above-mentioned each embodiment; through test of many times; adopt the soft metal sealing gasket of unlike material and different rubber o-ring materials; within the scope of corresponding serviceability temperature, effect is similar; its version and other embodiments should be in the protection domains of claim, and its effect is also that those skilled in the art predict.Although adopted in this article particular term, they are general and descriptive explanation just, is not to limit.
Claims (9)
1. the sealing configuration for high-pressure composite gas cylinder (14), comprise: end socket (1), connecting-tube nozzle (2), the connecting thread (3) of end socket (1) and connecting-tube nozzle (2), and metallic gasket (10) axial seal structure of connecting thread (3) one sides, connecting thread (3) opposite side is equipped with the radial seal structure of ring washer (11) and rubber o-ring (12);
It is characterized in that:
The top of end socket (1) has place's step trough (4), in its plane, have a triangular groove (6), the mid-metallic gasket (10) that is placed with of step trough (4), connecting-tube nozzle (2) has place's step trough (5) too, in its plane, also have a triangular groove (7), step trough (5) combines the rear enclosed slot structure that forms with the step trough (4) of end socket (1);
Under connecting thread (3) towards one section that extends in bottle have one base open for assembling the seal groove (8) of ring washer (11) and rubber o-ring (12), connecting-tube nozzle (2) is connected by connecting thread (13) in bottom with blocking cap (9).
2. sealing configuration according to claim 1, is characterized in that: described end socket (1) is aluminum alloy material.
3. sealing configuration according to claim 1, is characterized in that: the outside diameter of described end socket (1) is 45mm～60mm.
4. according to the sealing configuration described in any one in claims 1 to 3, it is characterized in that: described connecting-tube nozzle (2) is stainless steel.
5. according to the sealing configuration described in any one in claims 1 to 3, it is characterized in that: described metallic gasket (10) material is copper or mild steel.
6. according to the sealing configuration described in any one in claims 1 to 3, it is characterized in that: described ring washer (11) material is the rare or polychlorotrifluoroethylene of perfluoroethylene third.
7. according to the sealing configuration described in any one in claims 1 to 3, it is characterized in that: described rubber o-ring (12) material is silicone rubber or neoprene.
8. according to the sealing configuration described in any one in claims 1 to 3, it is characterized in that: the decrement of described rubber o-ring (12) is 15%～35%.
9. according to the sealing configuration described in any one in claims 1 to 3, it is characterized in that: the length of side of described triangular groove (6,7) is 0.3～0.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320551236.5U CN203517310U (en) | 2013-09-06 | 2013-09-06 | Sealing structure for high-pressure composite cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320551236.5U CN203517310U (en) | 2013-09-06 | 2013-09-06 | Sealing structure for high-pressure composite cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN203517310U true CN203517310U (en) | 2014-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320551236.5U Expired - Lifetime CN203517310U (en) | 2013-09-06 | 2013-09-06 | Sealing structure for high-pressure composite cylinder |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105290736A (en) * | 2015-11-20 | 2016-02-03 | 沈阳航天新光集团有限公司 | Seal of front sealing head of high-pressure gas cylinder and machining method of seal |
| CN108679440A (en) * | 2018-07-05 | 2018-10-19 | 张家港富瑞氢能装备有限公司 | A kind of high-pressure hydrogen storage cylinder |
| CN108899100A (en) * | 2018-07-05 | 2018-11-27 | 清华大学 | A kind of ball bed high-temperature stack sets maintenance sealing structure |
| CN112943483A (en) * | 2021-01-26 | 2021-06-11 | 西安航天动力研究所 | Double-channel redundant sealing device of liquid rocket engine |
-
2013
- 2013-09-06 CN CN201320551236.5U patent/CN203517310U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105290736A (en) * | 2015-11-20 | 2016-02-03 | 沈阳航天新光集团有限公司 | Seal of front sealing head of high-pressure gas cylinder and machining method of seal |
| CN105290736B (en) * | 2015-11-20 | 2018-05-04 | 沈阳航天新光集团有限公司 | The processing method of gas cylinder front head sealing |
| CN108679440A (en) * | 2018-07-05 | 2018-10-19 | 张家港富瑞氢能装备有限公司 | A kind of high-pressure hydrogen storage cylinder |
| CN108899100A (en) * | 2018-07-05 | 2018-11-27 | 清华大学 | A kind of ball bed high-temperature stack sets maintenance sealing structure |
| CN112943483A (en) * | 2021-01-26 | 2021-06-11 | 西安航天动力研究所 | Double-channel redundant sealing device of liquid rocket engine |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20140402 |