JPH022024B2 - - Google Patents
Info
- Publication number
- JPH022024B2 JPH022024B2 JP59044766A JP4476684A JPH022024B2 JP H022024 B2 JPH022024 B2 JP H022024B2 JP 59044766 A JP59044766 A JP 59044766A JP 4476684 A JP4476684 A JP 4476684A JP H022024 B2 JPH022024 B2 JP H022024B2
- Authority
- JP
- Japan
- Prior art keywords
- filler material
- spiral
- gasket
- expanded graphite
- wound gasket
- 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.)
- Expired - Lifetime
Links
- 239000000463 material Substances 0.000 claims description 32
- 239000000945 filler Substances 0.000 claims description 30
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 18
- 239000010439 graphite Substances 0.000 claims description 18
- 229910002804 graphite Inorganic materials 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 8
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims description 8
- 239000000835 fiber Substances 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 description 9
- 239000010425 asbestos Substances 0.000 description 7
- 229910052895 riebeckite Inorganic materials 0.000 description 7
- 239000007789 gas Substances 0.000 description 4
- 239000001307 helium Substances 0.000 description 4
- 229910052734 helium Inorganic materials 0.000 description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003466 welding Methods 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
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/322—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip supported in a direction perpendicular to the surfaces
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Description
【発明の詳細な説明】
本発明は、断面波形の金属帯板と帯状のフイラ
ー材とを、互いに重合させた状態で複数回うず巻
状に巻回してなるうず巻形ガスケツトに関するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a spirally wound gasket formed by winding a metal strip having a corrugated cross-section and a strip-shaped filler material in a spiral shape a plurality of times in a superposed state.
従来のこの種うず巻形ガスケツトにおいては、
石綿製のフイラー材が用いられることが多いが、
石綿は、その結晶水が低温下で固化して、低温脆
性化し易いものであるため、石綿製のフイラー材
を用いたうず巻形ガスケツトは、低温条件下で
は、フイラー材の変形能が低下して金属帯板に対
する追随性も悪くなり、良好な密封機能を期待し
得ないものである。 In conventional spiral-wound gaskets of this type,
Asbestos filler material is often used,
Asbestos tends to solidify at low temperatures and become brittle at low temperatures. Therefore, in spiral-wound gaskets using asbestos filler material, the deformability of the filler material decreases under low-temperature conditions. Therefore, the conformability to the metal strip plate becomes poor, and a good sealing function cannot be expected.
そこで、従来からも、膨張黒鉛製のフイラー材
を用いたうず巻形ガスケツトが提案されており、
かかるガスケツトは、膨張黒鉛が石綿に比して低
温特性及び屈曲性に優れているところから、低温
条件下においても、石綿製のフイラー材を用いた
ものに比して、優れた密封機能が期待されるもの
である。 Therefore, spiral-wound gaskets using filler material made of expanded graphite have been proposed.
Since expanded graphite has superior low-temperature properties and flexibility compared to asbestos, such gaskets are expected to have superior sealing performance even under low-temperature conditions compared to gaskets using asbestos filler material. It is something that will be done.
しかしながら、膨張黒鉛は、その性質上、もろ
く且つ塑性流動性が悪いものであるところから、
使用時にうず巻形ガスケツトを圧縮させた場合、、
第１図に示す如く、フイラー材２の、金属帯板１
の屈曲凹部１ａに密接する部分２ａに、隙間３若
しくは密度の疎な部分が生じる虞れがある。この
ような虞れは、程度の差こそあれ、密封温度条件
に拘わらず、また石綿製のフイラー材を用いた場
合にも、同様に生じる。 However, expanded graphite is brittle and has poor plastic fluidity due to its nature.
If the spiral gasket is compressed during use,
As shown in FIG. 1, a metal strip 1 of filler material 2
There is a possibility that a gap 3 or a low-density portion may occur in the portion 2a that is in close contact with the bent recess 1a. Such a risk occurs to varying degrees regardless of the sealing temperature conditions and even when asbestos filler material is used.
而して、上記の如く両者１，２間に隙間３（若
しくは密度の疎な部分）が生じると、ガスケツト
のフランジ接触面たる表面４ａ，４ｂからの表面
洩れが何ら生じていないにも拘わらず、密封流体
がガスケツトの巻始め端から前記隙間３を伝つて
うず巻方向に洩れるといつた浸透洩れが生じるこ
とになり、良好な密封機能が発揮されないことに
なる。 Therefore, if a gap 3 (or a low-density area) occurs between both 1 and 2 as described above, even though no surface leakage occurs from the surfaces 4a and 4b, which are the flange contact surfaces of the gasket. If the sealing fluid leaks from the winding start end of the gasket through the gap 3 in the spiral direction, seepage leakage will occur, and a good sealing function will not be achieved.
本発明は、上記した点に鑑みてなされたもの
で、浸透洩れを防止でき、低温条件下においても
良好な密封機能を発揮しうるうず巻形ガスケツト
を提供するものである。 The present invention has been made in view of the above-mentioned points, and provides a spiral-wound gasket that can prevent permeation leakage and exhibit a good sealing function even under low-temperature conditions.
この課題を解決した本発明のうず巻形ガスケツ
トは、特に、前記フイラー材を膨張黒鉛で構成す
ると共に、該フイラー材の、前記金属帯板の屈曲
凹部に密接する部位に、黒鉛粒子を均一に配合さ
せた四弗化エチレン樹脂繊維からなる補助フイラ
ー材を充填したものである。 In particular, the spirally wound gasket of the present invention which solves this problem comprises the filler material made of expanded graphite, and graphite particles are evenly distributed in the portion of the filler material that is in close contact with the bent recess of the metal strip. It is filled with an auxiliary filler material made of blended tetrafluoroethylene resin fibers.
次に、その実施例を第２図について説明する。 Next, an example thereof will be explained with reference to FIG.
第２図に示すうず巻形ガスケツトは、断面く字
形の金属帯板１１と膨張黒鉛からなる帯状のフイ
ラー材１２と黒鉛粒子を均一に配合させた四弗化
エチレン樹脂繊維からなる補助フイラー材１３と
からなり、フイラー材１２の巾方向中央部にその
長手方向に沿つて補助フイラー材１３を重合密着
させたものを、該補助フイラー材１３を金属帯板
１１の屈曲凹部１１ａ内に嵌入させた状態で、金
属帯板１１にその長手方向に沿つて重合密着させ
た上、これらを複数回うず巻状に巻回しリング状
に成形したものである。なお、ガスケツトの内周
部及び外周部においては、金属帯板１１のみ単独
で数回巻装し、その端部を溶接により止着せしめ
ている。 The spiral-wound gasket shown in FIG. 2 consists of a metal band plate 11 with a dog-shaped cross section, a band-shaped filler material 12 made of expanded graphite, and an auxiliary filler material 13 made of tetrafluoroethylene resin fibers uniformly mixed with graphite particles. An auxiliary filler material 13 is polymerized and adhered to the widthwise central portion of the filler material 12 along its longitudinal direction, and the auxiliary filler material 13 is fitted into the bent recess 11a of the metal strip 11. In this state, the metal band plate 11 is superimposed and adhered to the metal band plate 11 along its longitudinal direction, and then these are wound in a spiral shape a plurality of times to form a ring shape. In addition, the metal band plate 11 is individually wound several times around the inner and outer peripheral parts of the gasket, and the ends are fixed by welding.
補助フイラー材１３を構成する四弗化エチレン
樹脂繊維は、例えば、未焼成の四弗化エチレン樹
脂粉末と黒鉛粒子とを均一に混合撹拌した上、押
出し加工法等により繊維化して得られたものであ
り、黒鉛粒子が均一に分散配合されているもので
ある。この場合、四弗化エチレン樹脂粉末に対す
る黒鉛粒子の混合重量比は20〜80％であることが
望ましく、上記実施例のものでは約20％に設定し
てある。 The tetrafluoroethylene resin fibers constituting the auxiliary filler material 13 are obtained by, for example, uniformly mixing and stirring unfired tetrafluoroethylene resin powder and graphite particles, and then turning the mixture into fibers by extrusion processing or the like. Graphite particles are uniformly dispersed and blended. In this case, the mixing weight ratio of the graphite particles to the tetrafluoroethylene resin powder is preferably 20 to 80%, and in the above example, it is set to about 20%.
このような構成のうず巻形ガスケツトにあつて
は、冒頭で述べた如く浸透洩れの原因となる隙間
若しくは密度の疎な部分が生じ易い箇所、つまり
フイラー材１２の、金属帯板１１の屈曲凹部１１
ａに密接する箇所１２ａにおいて、補助フイラー
材１３が屈曲凹部１１ａ内に密に嵌入された状態
でうず巻方向に連続して充填されているから、上
記隙間若しくは密度の疎な部分が生じることがな
く、うず巻方向の浸透洩れが確実に防止される。 In the case of a spiral gasket having such a configuration, as mentioned at the beginning, gaps or low-density areas that cause seepage leakage are likely to occur, that is, the bent recesses of the metal strip 11 of the filler material 12. 11
Since the auxiliary filler material 13 is tightly fitted into the bent recess 11a and is continuously filled in the spiral direction at the location 12a that is in close contact with the curved recess 11a, the above-mentioned gaps or areas with low density do not occur. Therefore, permeation leakage in the spiral direction is reliably prevented.
しかも、補助フイラー材１３は、黒鉛粒子を均
一に配合した四弗化エチレン樹脂繊維からなるた
め、金属帯板１１に対する滑り性に優れていると
共に、黒鉛粒子が一種の目詰め材としての機能を
果たすことになり、したがつて浸透洩れをより有
効に防止することになる。 In addition, since the auxiliary filler material 13 is made of tetrafluoroethylene resin fiber with graphite particles evenly mixed therein, it has excellent sliding properties on the metal strip 11, and the graphite particles function as a kind of plugging material. Therefore, seepage leakage can be more effectively prevented.
さらに、フイラー材１２を構成する膨張黒鉛及
び補助フイラー材１３を構成する黒鉛粒子配合の
四弗化エチレン樹脂は、何れも石綿に比して低温
特性に優れているものであるから、抵温条件下に
おいて、特に極低温条件下においても、良好な密
封機能を発揮しうる。 Furthermore, the expanded graphite constituting the filler material 12 and the tetrafluoroethylene resin containing graphite particles constituting the auxiliary filler material 13 both have superior low-temperature properties compared to asbestos. It can exhibit a good sealing function even under low temperature conditions, especially at extremely low temperatures.
ところで、本発明のうず巻形ガスケツトの常温
条件下及び極低温条件下における密封性能を、補
助フイラー材を有さず膨張黒鉛製のフイラー材を
用いた従来のうず巻形ガスケツトを比較例として
比較実験したところ、第３図及び第４図に示す如
き結果が得られた。なお、第３図及び第４図にお
いては、本発明のうず巻形ガスケツトの実験結果
を実線で、従来のうず巻形ガスケツトの実験結果
を破線で示してある。 By the way, the sealing performance of the spiral-wound gasket of the present invention under normal temperature conditions and extremely low temperature conditions was compared with a conventional spiral-wound gasket that did not have an auxiliary filler material and used an expanded graphite filler material as a comparative example. As a result of the experiment, the results shown in FIGS. 3 and 4 were obtained. In FIGS. 3 and 4, the experimental results for the spiral-wound gasket of the present invention are shown by solid lines, and the experimental results for the conventional spiral-wound gasket are shown by broken lines.
すなわち、常温条件下の実験においては、内径
128mm、外径145mm及び厚さ4.5mmのリング状に成
形した各ガスケツトをフランジ間に締付面圧400
Kg／cm2で装着させた上で、ヘリウムガス50Kg／cm2
を負荷して、この流体圧力負荷後の経過時間に対
する各ガスケツトからのヘリウムガスの漏洩量を
測定した。その結果は、第３図に示す通りであ
る。 In other words, in experiments under room temperature conditions, the inner diameter
Each gasket is formed into a ring shape with a diameter of 128 mm, an outer diameter of 145 mm, and a thickness of 4.5 mm and is tightened between the flanges with a surface pressure of 400 mm.
Kg/cm 2 and helium gas 50Kg/cm 2
was applied, and the amount of helium gas leaking from each gasket was measured over the elapsed time after this fluid pressure was applied. The results are shown in FIG.
また、極低温条件の実験においては、フランジ
内部に液体窒素を通し、各ガスケツトの近傍部分
の温度が−170℃以下になるまで冷却し、その後
ヘリウムガス50Kg／cm2を負荷して、流体圧力負荷
後の経過時間に対する各ガスケツトからのヘリウ
ムガスの漏洩量を測定した。その結果は、第４図
に示す通りである。なお、上記以外の実験条件は
前記常温条件下の実験におけると同一である。 In addition, in experiments under cryogenic conditions, liquid nitrogen was passed inside the flange to cool it until the temperature of the area near each gasket was -170℃ or less, and then 50 kg/cm 2 of helium gas was loaded to increase the fluid pressure. The amount of helium gas leaking from each gasket with respect to the elapsed time after loading was measured. The results are shown in FIG. Note that the experimental conditions other than the above were the same as in the experiment under room temperature conditions.
したがつて、これらの実験結果及び前記説明か
らも容易に理解されるように、本発明のうず巻形
ガスケツトは、従来のものに比して、浸透洩れを
有効に防止することができ、低温条件下、特に極
低温条件下においても、良好な密封機能を発揮し
うるものであつて、その実用価値極めて大なるも
のである。 Therefore, as can be easily understood from these experimental results and the above explanation, the spiral-wound gasket of the present invention can more effectively prevent seepage leakage than the conventional gasket, and can withstand low temperatures. It can exhibit a good sealing function even under conditions, especially at extremely low temperatures, and its practical value is extremely great.
第１図は従来のうず巻形ガスケツトを示す圧縮
使用状態の一部切欠縦断側面図であり、第２図は
本発明に係るうず巻形ガスケツトの一実施例を示
す圧縮使用状態の一部切欠縦断側面図であり、第
３図は常温条件下における実験結果を示すグラフ
であり、第４図は極低温条件下における実験結果
を示すグラフである。
１１……金属帯板、１１ａ……屈曲凹部、１２
……フイラー材、１３……補助フイラー材。
FIG. 1 is a partially cutaway vertical side view showing a conventional spiral-wound gasket in a compressed use state, and FIG. 2 is a partially cutaway side view showing an embodiment of the spiral-wound gasket according to the present invention in a compressed use state. FIG. 3 is a graph showing the experimental results under normal temperature conditions, and FIG. 4 is a graph showing the experimental results under extremely low temperature conditions. 11...Metal band plate, 11a...Bending recess, 12
...Filler material, 13...Auxiliary filler material.
Claims (1)
を、互いに重合させた状態で複数回うず巻状に巻
回してなるうず巻形ガスケツトにおいて、前記フ
イラー材を膨張黒鉛で構成すると共に、該フイラ
ー材の、前記金属帯板の屈曲凹部に密接する部位
に、黒鉛粒子を均一に配合させた四弗化エチレン
樹脂繊維からなる補助フイラー材を充填したこと
を特徴とするうず巻形ガスケツト。1. A spirally wound gasket formed by winding a metal band plate with a corrugated cross-section and a band-shaped filler material multiple times in a spiral shape in a superposed state, in which the filler material is made of expanded graphite, and the filler material is made of expanded graphite. A spirally wound gasket characterized in that an auxiliary filler material made of tetrafluoroethylene resin fibers uniformly mixed with graphite particles is filled in a portion of the material that is in close contact with the bent recess of the metal band plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59044766A JPS60188664A (en) | 1984-03-07 | 1984-03-07 | Spiral gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59044766A JPS60188664A (en) | 1984-03-07 | 1984-03-07 | Spiral gasket |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60188664A JPS60188664A (en) | 1985-09-26 |
| JPH022024B2 true JPH022024B2 (en) | 1990-01-16 |
Family
ID=12700537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59044766A Granted JPS60188664A (en) | 1984-03-07 | 1984-03-07 | Spiral gasket |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60188664A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH086810B2 (en) * | 1988-03-03 | 1996-01-29 | 日本ピラー工業株式会社 | Spiral wound gasket |
-
1984
- 1984-03-07 JP JP59044766A patent/JPS60188664A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60188664A (en) | 1985-09-26 |
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