CN112610699A - High-temperature gas dynamic sealing structure - Google Patents
High-temperature gas dynamic sealing structure Download PDFInfo
- Publication number
- CN112610699A CN112610699A CN202011477070.8A CN202011477070A CN112610699A CN 112610699 A CN112610699 A CN 112610699A CN 202011477070 A CN202011477070 A CN 202011477070A CN 112610699 A CN112610699 A CN 112610699A
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- Prior art keywords
- piston
- sealing
- sealing ring
- ring
- sealing structure
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- 238000007789 sealing Methods 0.000 title claims abstract description 57
- 239000002184 metal Substances 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000007769 metal material Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
- F16J15/46—Sealings with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable packings
- F16J15/48—Sealings with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable packings influenced by the pressure within the member to be sealed
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Architecture (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses a high-temperature gas dynamic sealing structure, which is characterized in that a piston is sealed by a U-shaped sealing ring, reliable sliding sealing is realized by utilizing the gas pressure difference at two sides of the sealing, and the sealing elastic sheet is made of metal materials and can bear higher environmental temperature, so the scheme of the sealing structure can realize dynamic sealing of high-temperature gas within 800 ℃.
Description
Technical Field
The invention belongs to the technical field of high-temperature sealing, and particularly relates to a high-temperature gas dynamic sealing structure.
Background
At present, the gas dynamic seal mainly adopts a gap dynamic seal scheme and a rubber plastic dynamic seal scheme, such as tenon tooth gap dynamic seal, rubber O-shaped ring dynamic seal, flexible graphite dynamic seal and the like which are commonly adopted by an aircraft engine. The tenon tooth dynamic sealing structure is suitable for a high-speed rotating sealing environment, the rubber and plastic material is suitable for a medium-low temperature sealing environment, and the high-temperature gas sealing is mainly sealed by a metal C ring or a metal W ring at present.
Disclosure of Invention
In view of the above, the present invention provides a high temperature gas dynamic seal structure, which realizes dynamic seal of a large-scale high temperature and high pressure gas ring cavity, and meets the application of high temperature gas dynamic seal of micro leakage class such as aircraft engine.
A pneumatic sealing structure in a high-temperature environment comprises an annular cavity (1), a piston (2) and a U-shaped sealing ring (3); a synchronous piston (2) is arranged at the opening end of the annular cavity (1), the space between the annular cavity (1) and the piston (2) is in a high-pressure environment, and the outside of the annular cavity (1) is in a low-pressure environment; the U-shaped sealing ring (3) is made of metal plates, is integrally annular, and has a U-shaped cross section, the U-shaped sealing ring (3) is sleeved on the piston (2), an inner circle is fixedly connected with the outer wall of the piston (2), and an outer circle of the U-shaped sealing ring (3) is tightly pressed on the inner wall surface of the annular cavity (1).
Preferably, the inner circle of the U-shaped sealing ring (3) and the piston (2) can be connected through threads, welding or screws.
The invention has the following beneficial effects:
according to the high-temperature gas dynamic sealing structure, the piston is sealed by the U-shaped sealing ring, reliable sliding sealing is realized by utilizing the gas pressure difference on two sides of the sealing, and the sealing elastic sheet is made of metal materials and can bear higher environmental temperature, so that dynamic sealing of high-temperature gas within 800 ℃ can be realized by the sealing structure scheme.
Drawings
FIG. 1 is a schematic view of the present invention installed in a ring cavity;
FIG. 2 is a schematic structural view of a U-shaped seal ring;
fig. 3 is a detail view of the installation of the U-shaped seal ring with the piston and the ring cavity.
Wherein, 1-ring cavity, 2-piston, 3-U type sealing ring, 4-mounting hole.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The invention provides a design scheme of a pneumatic sealing structure in a high-temperature environment, wherein the structure is made of metal plates and is suitable for an annular pressure ring cavity 1, as shown in figure 1. A synchronous piston 2 is arranged at the opening end of the annular cavity 1, the space between the annular cavity 1 and the piston 2 is in a high-pressure environment, and the outside of the annular cavity 1 is in a low-pressure environment; as shown in figure 2, the U-shaped sealing ring 3 of the invention is in a ring shape as a whole, the section of the U-shaped sealing ring is in a U shape, as shown in figure 3, the U-shaped sealing ring 3 is sleeved on the piston 2, the inner circle of the U-shaped sealing ring is fixedly connected with the outer wall of the piston 2, and the outer circle of the U-shaped sealing ring 3 is tightly pressed on the inner wall surface of the ring cavity 1.
The inner circle of the U-shaped sealing ring 3 and the piston 2 can be connected through threads, welded or connected through screws by arranging the mounting holes 4.
When the gas pressure in the ring cavity 1 is gradually increased, the outer circle of the U-shaped sealing ring 3 is bounced outwards under the action of the pressure of high-pressure gas, is in close contact with the fixed surface of the ring cavity and generates local deformation to form a sealing surface, the sealing surface can change along with the change of the pressure, the automatic pressure pre-tightening function is realized, sealing failure caused by the increase of the gas pressure is avoided, meanwhile, larger sliding friction resistance is avoided under the condition of smaller pressure, the effect of better balancing the pressure and the sliding resistance can be realized, and the pre-pressure can also ensure the condition of insufficient metal creep sealing elasticity caused by long-term use.
The dynamic sealing scheme of the invention can meet the requirement of high-temperature gas dynamic sealing in a large-size (meter-scale) space, the leakage amount is very small, and through detection, under the size of 1 meter in diameter and 4 atmospheric pressures of gas pressure difference, the average leakage amount is 0.73g/s, and the leakage area is about 1.11mm2. The sealing structure scheme has good dynamic sealing effect, simple structure and high reliability.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A pneumatic sealing structure in a high-temperature environment is characterized by comprising a ring cavity (1), a piston (2) and a U-shaped sealing ring (3); a synchronous piston (2) is arranged at the opening end of the annular cavity (1), the space between the annular cavity (1) and the piston (2) is in a high-pressure environment, and the outside of the annular cavity (1) is in a low-pressure environment; the U-shaped sealing ring (3) is made of metal plates, is integrally annular, and has a U-shaped cross section, the U-shaped sealing ring (3) is sleeved on the piston (2), an inner circle is fixedly connected with the outer wall of the piston (2), and an outer circle of the U-shaped sealing ring (3) is tightly pressed on the inner wall surface of the annular cavity (1).
2. A high temperature environment pneumatic sealing structure according to claim 1, wherein the inner circle of the U-shaped sealing ring (3) is connected with the piston (2) by screw thread.
3. A pneumatic sealing structure in high temperature environment according to claim 1, characterized in that the inner circle of the U-shaped sealing ring (3) is welded with the piston (2).
4. A high temperature environment pneumatic sealing structure according to claim 1, wherein the inner circle of the U-shaped sealing ring (3) is connected with the piston (2) by screws.
5. A high temperature environment pneumatic sealing structure according to claim 1, wherein the average leakage amount of the ring cavity (1) is 0.73g/s and the leakage area is about 1.11mm under the gas pressure difference of 4 atmospheric pressures under the diameter of 1 meter2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011477070.8A CN112610699A (en) | 2020-12-15 | 2020-12-15 | High-temperature gas dynamic sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011477070.8A CN112610699A (en) | 2020-12-15 | 2020-12-15 | High-temperature gas dynamic sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112610699A true CN112610699A (en) | 2021-04-06 |
Family
ID=75234144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011477070.8A Pending CN112610699A (en) | 2020-12-15 | 2020-12-15 | High-temperature gas dynamic sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112610699A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114909596A (en) * | 2022-06-23 | 2022-08-16 | 西安热工研究院有限公司 | Gravity-type gas storage structure for easy construction |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB848590A (en) * | 1958-06-11 | 1960-09-21 | Angus George Co Ltd | Improvements in fluid-tight packing rings |
| JPH0882372A (en) * | 1994-09-09 | 1996-03-26 | Mitsubishi Cable Ind Ltd | U-shaped seal |
| US6302402B1 (en) * | 1999-07-07 | 2001-10-16 | Air Products And Chemicals, Inc. | Compliant high temperature seals for dissimilar materials |
| CN102537350A (en) * | 2012-02-14 | 2012-07-04 | 中国航空动力机械研究所 | Sealing ring and aircraft engine with same |
| WO2015084441A2 (en) * | 2013-08-30 | 2015-06-11 | United Technologies Corporation | Sliding seal |
| CN106715880A (en) * | 2014-10-01 | 2017-05-24 | 大众汽车有限公司 | Piston, piston machine having such a piston, and motor vehicle having such a piston machine |
| CN212106919U (en) * | 2020-04-20 | 2020-12-08 | 凯氟隆（厦门）密封件有限公司 | Sealing structure for sealing miniature plunger |
-
2020
- 2020-12-15 CN CN202011477070.8A patent/CN112610699A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB848590A (en) * | 1958-06-11 | 1960-09-21 | Angus George Co Ltd | Improvements in fluid-tight packing rings |
| JPH0882372A (en) * | 1994-09-09 | 1996-03-26 | Mitsubishi Cable Ind Ltd | U-shaped seal |
| US6302402B1 (en) * | 1999-07-07 | 2001-10-16 | Air Products And Chemicals, Inc. | Compliant high temperature seals for dissimilar materials |
| CN102537350A (en) * | 2012-02-14 | 2012-07-04 | 中国航空动力机械研究所 | Sealing ring and aircraft engine with same |
| WO2015084441A2 (en) * | 2013-08-30 | 2015-06-11 | United Technologies Corporation | Sliding seal |
| CN106715880A (en) * | 2014-10-01 | 2017-05-24 | 大众汽车有限公司 | Piston, piston machine having such a piston, and motor vehicle having such a piston machine |
| CN212106919U (en) * | 2020-04-20 | 2020-12-08 | 凯氟隆（厦门）密封件有限公司 | Sealing structure for sealing miniature plunger |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114909596A (en) * | 2022-06-23 | 2022-08-16 | 西安热工研究院有限公司 | Gravity-type gas storage structure for easy construction |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210406 |