CN114439939B - Metal ripple self-sealing composite gasket - Google Patents
Metal ripple self-sealing composite gasket Download PDFInfo
- Publication number
- CN114439939B CN114439939B CN202210020553.8A CN202210020553A CN114439939B CN 114439939 B CN114439939 B CN 114439939B CN 202210020553 A CN202210020553 A CN 202210020553A CN 114439939 B CN114439939 B CN 114439939B
- Authority
- CN
- China
- Prior art keywords
- metal
- ring
- ripple
- annular
- corrugated
- 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.)
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 141
- 239000002184 metal Substances 0.000 title claims abstract description 141
- 238000007789 sealing Methods 0.000 title claims abstract description 31
- 239000002131 composite material Substances 0.000 title claims description 19
- 150000001875 compounds Chemical class 0.000 claims abstract description 3
- 241000283216 Phocidae Species 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 5
- -1 polytetrafluoroethylene Polymers 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000008859 change Effects 0.000 abstract description 2
- 238000012856 packing Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/12—Details
- F16J9/20—Rings with special cross-section; Oil-scraping 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/26—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction characterised by the use of particular materials
Abstract
The invention discloses a metal ripple self-sealing compound gasket which comprises a first covering layer, a first metal ripple ring piece, an annular metal framework, a second metal ripple ring piece and a second covering layer, wherein metal filling layers with hardness smaller than that of the annular metal framework and the first metal ripple ring piece and the second metal ripple ring piece are respectively arranged on one sides, close to the periphery, of an upper annular groove and a lower annular groove of the annular metal framework, and at least two ripples of the first metal ripple ring piece and the second metal ripple ring piece are in line sealing contact with the metal filling layers. The invention has good sealing performance, is more suitable for occasions with frequent pressure change, is easy to produce and manufacture, and has lower manufacturing cost.
Description
Technical Field
The invention relates to a sealing gasket, in particular to a metal corrugated self-sealing composite gasket.
Background
Gaskets are mainly used for sealing detachable parts such as pipelines, pressure vessels and the like. The gasket is sealed mainly by the pretightening force of the bolts and the flanges, and the bolts add pretightening force to the upper flange surface and the lower flange surface to enable the upper flange surface and the lower flange surface to squeeze the gasket, so that the gasket is sealed. In the conventional gasket, the stress of the gasket is often reduced due to the increase of the internal pressure of the medium, and the sealing property is affected.
Chinese patent publication No. CN113431901a discloses a metal corrugated self-sealing composite gasket that compensates for the reduction of stress of the gasket by introducing a medium between the carcass and the corrugated sheets. Compared with the prior composite gasket with the annular seam, the manufacturing difficulty is reduced, but the requirement on the tightness is higher. The technical scheme mainly relies on the corrugated sheet to set up the packing ring with the skeleton to and set up annular draw-in groove at the skeleton lateral wall, utilizes the cooperation between corrugated sheet and the packing ring to improve sealed effect. The gasket has reduced sealing performance in applications where pressure changes are frequent, because the packing ring is deformed less than the corrugated sheets. In addition, the good matching between the filling ring and the corrugated sheet is ensured, and the requirement on the manufacturing process is high, so the manufacturing cost is still high.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the metal corrugated self-sealing composite gasket, which has the advantages of improving the sealing performance of the gasket under frequent pressure change and reducing the manufacturing cost of the gasket.
The technical scheme of the invention is as follows: the utility model provides a metal ripple self sealss compound gasket, includes first overburden, first metal ripple ring piece, annular metal skeleton, second metal ripple ring piece and second overburden, annular metal skeleton's upper and lower surface sets up ring channel and lower ring channel respectively, first metal ripple ring piece set up in go up in the ring channel, second metal ripple ring piece set up in the ring channel down, first overburden cover in first metal ripple ring piece's upper surface, second overburden cover in metal ripple ring piece's lower surface, metal skeleton is equipped with a plurality of blind holes that extend along by the outside periphery of central through-hole, the blind hole is in go up between ring channel and the ring channel down, first metal ripple ring piece with constitute first cavity between the ring channel, first cavity passes through a plurality of through-holes of going up the tank bottom of ring channel with the blind hole intercommunication, second metal ripple ring piece with constitute the second cavity between the ring channel down, the second cavity passes through down the through-hole with be equipped with a plurality of ring channel and ring channel have a plurality of ring channel and ring channel periphery to be equipped with a plurality of ring channel and second ripple ring channel, the metal seal ring is filled with the metal ripple layer is filled to one side at least two the metal ripple ring seal ring has the hardness to be equipped with the metal ripple ring is filled in the metal ripple layer.
Further, the surface of the metal filling layer is flush with the bottoms of the upper annular groove and the lower annular groove.
Further, the thickness of the metal filling layer is 0.2-0.3 mm.
Further, the blind holes are formed by welding and plugging through holes which transversely penetrate through the annular metal framework on the outer periphery side of the annular metal framework.
Further, the blind holes are arranged in 4-8 positions which are distributed at equal intervals on the circumference of the annular metal framework along the radial direction of the annular metal framework.
Further, the first metal corrugated ring sheet and the second metal corrugated ring sheet are nickel-titanium alloy or copper-zinc-aluminum alloy.
Further, the nominal diameter corrugation number of the first metal corrugated ring sheet and the second metal corrugated ring sheet is 6-8, and the corrugation amplitude value is 0.8-1.5 mm.
Further, the thickness of the first metal corrugated ring sheet and the second metal corrugated ring sheet is 0.3-0.6 mm.
Further, the first covering layer and the second covering layer are graphite layers, polytetrafluoroethylene layers, copper sheets, aluminum sheets or lead sheets.
Compared with the prior art, the invention has the advantages that:
the upper annular groove and the lower annular groove of the annular metal framework are provided with softer metal filling layers, the first metal corrugated ring piece, the second metal corrugated ring piece and the metal filling layers form gasket inner line sealing, deformation of the first metal corrugated ring piece and the second metal corrugated ring piece can keep signing line sealing with the metal filling layers in the repeated fluctuation process of medium pressure, leakage of medium from the gasket is prevented, the structure is simple, the processing is easy, and the processing and manufacturing cost is lower while the performance is guaranteed. The gasket further ensures the sealing performance of the gasket by utilizing the rebound force provided by the super-elastic effect of the first metal corrugated ring sheet and the second metal corrugated ring sheet made of the nickel-titanium alloy and the pressure of the internal high-pressure medium, and has small pretightening force and obviously prolonged service life. The annular metal framework is provided with the through hole, the through hole is formed in the annular metal framework, and the through hole is formed in the annular metal framework.
Drawings
FIG. 1 is a schematic cross-sectional view of a metal corrugated self-sealing composite gasket of the present invention.
Fig. 2 is a schematic diagram of a semi-side cross-sectional structure of the metal corrugated self-sealing composite gasket of the present invention.
Fig. 3 is a schematic top view of the annular metal skeleton.
Fig. 4 is a schematic view of a partial structure at a in fig. 3.
Fig. 5 is a schematic view of the cross-sectional structure of B-B of fig. 3.
Detailed Description
The invention is further illustrated, but is not limited, by the following examples.
In the embodiment, referring to fig. 1 to 5, a metal corrugated self-sealing composite gasket according to the present embodiment includes, from top to bottom, a first cover layer 1, a first metal corrugated ring sheet 2, an annular metal skeleton 3, a second metal corrugated ring sheet 4 and a second cover layer 5 that are coaxially disposed. The section of the annular metal framework 3 is H-shaped and is made of stainless steel. The annular metal bobbin 3 is provided with a central through hole 301, and flanges 302 are provided on the inner and outer circumferences of the upper and lower surfaces of the annular metal bobbin 3, respectively, whereby an upper annular groove 303 is formed between the inner and outer flanges 302 of the upper surface, and a lower annular groove 304 is formed between the inner and outer flanges 302 of the lower surface. There are 4 to 6 through holes 305 on the wall of the central through hole 301, and 6 through holes 305 are selected in this embodiment, and each through hole 305 is angularly spaced 60 degrees, that is, equally distributed in the circumferential direction. The through holes 305 extend horizontally to the outer peripheral side of the annular metal frame 3, and during machining, holes can be drilled inward from the outer peripheral side of the annular metal frame 3, and the through holes 305 can be sealed by welding to form blind holes on the outer peripheral side of the annular metal frame 3. 2-5 longitudinal through holes 306 are formed in the bottoms of the upper annular groove 303 and the lower annular groove 304 corresponding to each blind hole, and 3 sealing sheets are selected in the embodiment, namely, the sealing sheets enter the upper annular groove 303 and the lower annular groove 304 through the blind holes and the longitudinal through holes 306 and are positioned between the first metal corrugated ring sheet 2 and the upper annular groove 303 and between the second metal corrugated ring sheet 4 and the lower annular groove 304 when in use.
As shown in fig. 5, the bottoms of the upper annular groove 303 and the lower annular groove 304 are provided with an annular concave cavity 307 on the side close to the outer periphery (i.e., close to the outer flange), and it should be noted that the above-mentioned longitudinal through hole 306 communicating with the blind hole should not be in the range of the annular concave cavity 307. An annular metal sheet is laid in the annular concave cavity 307 to form a metal filling layer 6, and the annular metal sheet can be a material with hardness smaller than that of the annular metal framework 3, the first metal corrugated annular sheet 2 and the second metal corrugated annular sheet 4, such as a silver layer, an aluminum layer or a copper layer, and the thickness is 0.2-0.3 mm, and the embodiment selects 0.3mm. The top surface of the metal filling layer 6 is flush with the bottoms of the upper annular groove 303 and the lower annular groove 304. The first metal corrugated ring sheet 2 and the second metal corrugated ring sheet 4 are made of nickel-titanium alloy or copper-zinc-aluminum alloy, the sections of the first metal corrugated ring sheet and the second metal corrugated ring sheet are cosine waves, and the wave amplitude is: 0.8-1.5 mm, 1.4mm is adopted in the embodiment, the thickness is 0.3-0.6 mm, and the embodiment is 0.3mm. The first metal corrugated ring sheet 2 and the second metal corrugated ring sheet 4 are symmetrically arranged in the upper annular groove 303 and the lower annular groove 304, and the groove depth of the upper annular groove 303 and the lower annular groove 304 is smaller than the corrugated amplitude of the first metal corrugated ring sheet 2 and the second metal corrugated ring sheet 4. The two ends of the first metal corrugated ring sheet 2 and the second metal corrugated ring sheet 4 are respectively contacted with the side walls of the inner flange 302 and the outer flange 302, and can be fixed by welding. The number of corrugations of the first metal corrugated ring sheet 2 and the second metal corrugated ring sheet 4 is 6 to 8, and 6 are selected in this embodiment, wherein three of the first metal corrugated ring sheet 2 and the second metal corrugated ring sheet 4 near the inner ring are directly contacted with the bottoms of the upper annular groove 303 and the lower annular groove 304, and three of the first metal corrugated ring sheet 2 and the second metal corrugated ring sheet 4 near the outer ring are contacted with the upper surface of the metal filling layer 6 to form a line seal. When the gasket is installed, the internal wire seal is formed by utilizing the pretightening force of the bolt, so that the medium can be effectively prevented from leaking from the gasket.
The surface of the first metal corrugated ring sheet 2 is covered with a first cover layer 1, the surface of the second metal corrugated ring sheet 4 is covered with a second cover layer 5, and the first cover layer 1 and the second cover layer 5 extend to the peripheral edge from the central through hole 301 of the annular metal framework 3. The first cover layer 1 and the second cover layer 5 are graphite layers, polytetrafluoroethylene layers, copper sheets, aluminum sheets or lead sheets, and the surfaces in contact with the first metal corrugated ring sheet 2 and the second metal corrugated ring sheet 4 are corrugated surfaces to form close contact, and in the embodiment, the graphite layers are adopted.
The above examples were tested to have comparable rebound rates at the same pressure as the composite shims disclosed in CN113431901 a. Under the action of the pre-tightening stress of 45MPa and the medium pressure of 30MPa, the minimum contact stress of the wire sealing ring of the embodiment is 52.6MPa, and the minimum contact stress of the composite gasket disclosed in the CN113431901A is 33MPa, so that the embodiment has better self-sealing performance. According to measurement and calculation, the invention has lower mass production cost than CN113431901A, simple processing scheme and easy manufacture.
Claims (9)
1. The utility model provides a metal ripple self sealss compound gasket, includes first overburden, first metal ripple ring piece, annular metal skeleton, second metal ripple ring piece and second overburden, the upper and lower surface of annular metal skeleton sets up ring channel and lower ring channel respectively, first metal ripple ring piece set up in go up in the ring channel, the second metal ripple ring piece set up in the ring channel down, first overburden cover in the upper surface of first metal ripple ring piece, the second overburden cover in the lower surface of metal ripple ring piece, the metal skeleton is equipped with a plurality of blind holes that extend along the periphery by central through-hole, the blind hole is in go up between ring channel and the ring channel down, first metal ripple ring piece with constitute first cavity between the ring channel, first cavity passes through a plurality of through-holes of the tank bottom of going up the ring channel with the blind hole intercommunication, the second metal ripple ring piece with constitute the second cavity between the ring channel down, the second cavity passes through down the through-hole with the upper surface of first metal ripple ring piece, the second metal ripple ring piece is equipped with a plurality of ring channel and annular groove, the ring groove and the ring groove are filled with the metal ripple ring carrier is equipped with a plurality of hardness and is equipped with to be close to one side respectively in the metal ripple ring carrier, the metal ripple is filled in the metal ripple ring has the ring seal to be equipped with one side.
2. The metal corrugated self-sealing composite gasket of claim 1, wherein the surface of the metal filler layer is flush with the bottoms of the upper annular groove and the lower annular groove.
3. The metal corrugated self-sealing composite gasket of claim 2, wherein the thickness of the metal filling layer is 0.2-0.3 mm.
4. The metal corrugated self-sealing composite gasket according to claim 1, wherein the blind hole is formed by welding a plug at an outer peripheral side of the annular metal skeleton through a through hole penetrating the annular metal skeleton transversely.
5. The metal corrugated self-sealing composite gasket according to claim 1, wherein the number of blind holes is 4-8 along the radial direction of the annular metal framework and distributed at equal circumferential positions of the annular metal framework.
6. The metal corrugated self-sealing composite gasket of claim 1, wherein the first metal corrugated ring sheet and the second metal corrugated ring sheet are nickel-titanium alloy.
7. The metal corrugated self-sealing composite gasket according to claim 1, wherein the number of nominal diameter corrugations of the first metal corrugated ring sheet and the second metal corrugated ring sheet is 6-8, and the corrugated amplitude value is 0.8-1.5 mm.
8. The metal corrugated self-sealing composite gasket of claim 1, wherein the first metal corrugated ring sheet and the second metal corrugated ring sheet have a thickness of 0.3-0.6 mm.
9. The metal corrugated self-sealing composite gasket of claim 1, wherein the first and second cover layers are graphite layers, polytetrafluoroethylene layers, copper sheets, aluminum sheets, or lead sheets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210020553.8A CN114439939B (en) | 2022-01-10 | 2022-01-10 | Metal ripple self-sealing composite gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210020553.8A CN114439939B (en) | 2022-01-10 | 2022-01-10 | Metal ripple self-sealing composite gasket |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114439939A CN114439939A (en) | 2022-05-06 |
| CN114439939B true CN114439939B (en) | 2023-10-24 |
Family
ID=81366980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210020553.8A Active CN114439939B (en) | 2022-01-10 | 2022-01-10 | Metal ripple self-sealing composite gasket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114439939B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2828475A1 (en) * | 1978-06-29 | 1980-01-03 | Kempchen & Co Gmbh | Laminated annular seal - comprises corrugated steel core ring with sharp-crest corrugations and cuttable incompressible plastics or soft metal washers on either side |
| CN102261473A (en) * | 2011-07-22 | 2011-11-30 | 宁波金杉密封机械有限公司 | Metal vermiculite compound seal gasket |
| CN203963006U (en) * | 2014-05-12 | 2014-11-26 | 慈溪卡希尔密封材料有限公司 | A kind of high-strength graphite Composition spacer |
| CN113431901A (en) * | 2021-07-12 | 2021-09-24 | 常熟理工学院 | Metal corrugated self-sealing composite gasket |
-
2022
- 2022-01-10 CN CN202210020553.8A patent/CN114439939B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2828475A1 (en) * | 1978-06-29 | 1980-01-03 | Kempchen & Co Gmbh | Laminated annular seal - comprises corrugated steel core ring with sharp-crest corrugations and cuttable incompressible plastics or soft metal washers on either side |
| CN102261473A (en) * | 2011-07-22 | 2011-11-30 | 宁波金杉密封机械有限公司 | Metal vermiculite compound seal gasket |
| CN203963006U (en) * | 2014-05-12 | 2014-11-26 | 慈溪卡希尔密封材料有限公司 | A kind of high-strength graphite Composition spacer |
| CN113431901A (en) * | 2021-07-12 | 2021-09-24 | 常熟理工学院 | Metal corrugated self-sealing composite gasket |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114439939A (en) | 2022-05-06 |
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