CN1038844C - Sealing filler - Google Patents
Sealing filler Download PDFInfo
- Publication number
- CN1038844C CN1038844C CN93105206A CN93105206A CN1038844C CN 1038844 C CN1038844 C CN 1038844C CN 93105206 A CN93105206 A CN 93105206A CN 93105206 A CN93105206 A CN 93105206A CN 1038844 C CN1038844 C CN 1038844C
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- China
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- body material
- lock packing
- expanded graphite
- mentioned
- strongthener
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- Sealing Material Composition (AREA)
- Sealing Devices (AREA)
- Gasket Seals (AREA)
Abstract
The present invention relates to a sealing filler, the tensile strength and the toughness of which are improved through the multiplication effect of expandable graphite and reinforcing materials which are buried in the expandable graphite, consequently, damage, such as breaking off or cracking, is prevented when the present invention is used for weaving or twisting processes, and the early reducing of corrosion-resisting properties and sealing properties can be restrained at the same time. The reinforcing materials (2), (8), (24), (31) and (36) are buried in basis materials (1), (1'), (20), (22), (27), (29), (30) and (37) formed by the expandable graphite, the expandable graphite of which the expansion rate is over 40 times is used as the basis materials, the graphite content is over 90% of the weight, and the density is over 3 g/cm<3>.
Description
The present invention relates to that a kind of shaft sealing place of grading at fluid machinery uses, as the lock packing of the structured material of gland packing.
Lock packing in the past, for example through weaving or turn round the stubborn lock packing that is processed to form, in order not use asbestos, adopt the structure of the strongthener that the shortcoming of burying underground for the poor tensile strength that remedies this body material, the line of being made by various fibers constitute in the body material that thermotolerance and the good expanded graphite of stopping property are made.
Yet, the body material that above-mentioned expanded graphite is made is after known flakey natural graphite is expand into worm, with this expanded graphite compression molding, in the lock packing in the past that the body material of being made by this expanded graphite constitutes, relatively poor because of tensile strength, embrittlement is easily weaving or is turning round the stubborn man-hour that adds, owing on body material, applied bigger drawing force, the situation of be full of cracks on body material, often occurred.In addition, in the body material of above-mentioned lock packing in the past, because the ashes in the expanded graphite, residual foreign matter contents such as bowl Huang are very high, a large amount of impurity can make expanded graphite particles physical adsorption power each other weaken, the reason that this tensile strength that just becomes body material reduces, the oxidation owing to a large amount of impurity is simultaneously corroded body material long since, thereby corrosion resistance nature of the lock packing of making and the problem that sealing property reduces are more for a long time arranged.
The present invention makes in view of above-mentioned situation, its purpose is to provide a kind of lock packing, it is the tensile strength that has improved the body material itself that expanded graphite makes, and by body material and the synergism that is embedded in strongthener wherein, can prevent from braiding or turn round to twist to add the man-hour body material be full of cracks damage takes place, can suppress that corrosion resistance nature and sealing property are early stage just to be reduced simultaneously.
In order to realize above-mentioned purpose, lock packing of the present invention has body material that is formed by expanded graphite and the strongthener that is embedded in the body material, what above-mentioned body material used is that rate of expansion is at the expanded graphite more than 40 times, the while content of graphite is more than 90 weight %, and density is at 0.3g/cm
3More than.
If adopt the lock packing that is embedded with above-mentioned strongthener, owing to used the body material that forms at the expanded graphite more than 40 times by rate of expansion, just there is physical adsorption power fully acting on each other in expanded graphite particles, by body material and the synergism that is embedded in the strongthener in the body material of making by expanded graphite, make it have high tensile strength and toughness.In addition, because content of graphite is more than 90 weight %, thereby make the ash disadvantageous effect that impurity produced of grading reduce, be that the problem that expanded graphite particles physical adsorption power each other is lowered significantly also improves, thereby suppressed the reduction of tensile strength.And, suppressed the early stage corrosion that oxidation produced to body material because of a large amount of impurity, improved the long-term corrosion resistance nature and the sealing property of lock packing.Not, because the density of the body material that is formed by expanded graphite is set in 0.3g/cm
3More than, above-mentioned expanded graphite particles physical adsorption power each other is just very abundant, can not appear at the problem of shape collapse under the user mode.
Fig. 1 is the stereographic map of the lock packing of expression one embodiment of the present of invention,
Fig. 2 is the stereographic map of the lock packing of expression another embodiment of the present invention,
Fig. 3 is the lock packing stereographic map of expression with the gland packing of lock packing through turning round stubborn processing of six roots of sensation the foregoing description,
Fig. 4 is a gland seal filler stereographic map of representing the lock packing of eight the foregoing descriptions is carried out square weave,
Fig. 5 be the expression cloth shown in Figure 3 stereographic map as the gland seal filler of fuse,
Fig. 6 be the expression cloth shown in Figure 4 stereographic map as the gland seal filler of fuse,
Fig. 7 is a stereographic map of representing sheet material is used as the lock packing of strongthener,
Fig. 8 is expression the gather together schematic illustration figure of the lock packing manufacturing state that uses as body material of short slab shape sheet material,
Fig. 9 is the stereographic map of the expression lock packing of making according to Fig. 8,
Figure 10 is that expression folds the expanded graphite sheet and the formation body material, by the stereographic map of its lock packing that constitutes,
The stereographic map that the outstanding expression of Figure 11 is carried out the lock packing of corrugated shaping to the body material in the lock packing shown in Figure 10,
To be expression return again the stereographic map of the lock packing of folding twice and formation body material to the expanded graphite sheet to Figure 12,
Figure 13 is the stereographic map that expression is carried out the lock packing of corrugated shaping to the body material of Figure 12,
Figure 14 is the stereographic map of the lock packing of expression other embodiment of the present invention,
Figure 15 is the stereographic map that expression has the lock packing of the covering material that is different from Figure 14.
Below, with reference to accompanying drawing embodiments of the invention are described.
Fig. 1 is the stereographic map of the lock packing of expression one embodiment of the present of invention.
In Fig. 1, the 1st, the body material that constitutes by expanded graphite, the 2nd, be embedded in the strongthener in the body material 1 for the tensile strength that improves body material.
Above-mentioned body material 1 be lepidiod natural graphite is expanded after, it is carried out compression molding and the banded expanded graphite body that forms.The rate of expansion of the expanded graphite that uses in this body material 1 is set in more than 40 times, and content of graphite is that the density of body material is set in 0.3g/cm more than the 90 weight %
3More than.
In addition, above-mentioned strongthener 2 is from natural fibers such as cotton, fiber crops; Nylon, artificial silk, aromatic polyamide, PBI organic fibres such as (polybenzimidazole); Inorganic fibre such as glass, pottery; Choose in the line that various fibers such as steel fiber such as Stainless Steel Fibre, Inconel(nickel alloys) fiber are made, use many splicing threads that constitute by cotton in the present embodiment, with it intactly or make in its proofing after the tackiness agent, when body material 1 compression molding, be embedded in the body material 1.
By above-mentioned body material 1 be embedded in interim strongthener 2 and constitute lock packing P, also can in body material 1, only bury a this strongthener 2 underground.
In the resonable body material 1 of establishing above-mentioned strongthener 2, owing in this body material 1, use rate of expansion at the expanded graphite more than 40 times, thereby expansion phase act on physical adsorption power when fully each other effectively at graphite particle.Though can set rate of expansion and be the arbitrary value more than 40 times, preferably rate of expansion is set at about 200 times.In addition, because content of graphite is more than 90 weight %, the disadvantageous effect of being brought by ash content, residual impurity such as Sulfur just reduces, the i.e. decline of the tensile strength that is caused by the reduction of expanded graphite particles physical adsorption power each other also is improved, and suppressed to cause the early stage corrosion of body material 1, thereby the long-term corrosion resistance nature and the sealing property of lock packing also are improved by the oxidation of a lot of impurity.Here, content of graphite is 90 weight %, and in other words, if impurity less than 10 weight %, its set(ting)value then can be arbitrarily.Drawn by various experimental results, ash content accounts for 5% in the impurity, residual Sulfur is just enough below 1000ppm.In addition, because the density of the body material 1 that expanded graphite forms is set at 0.3g/cm
3More than, thereby the mutual physical adsorption power between the above-mentioned expanded graphite particles just can act on quite fully, do not have the problem that occurs the shape collapse under user mode simultaneously.
Fig. 2 represents the lock packing of another embodiment of the present invention, among the figure, and 1
1Be the body material that forms by expanded graphite, 2
1Be in order to strengthen body material 1
1Tensile strength and be embedded in body material 1
1In strongthener.In this embodiment, above-mentioned body material 1
1Be flexible expanded graphite sheet 1 to be arranged by polylith
1A is piled up formation, and is for example overlapping by four, to strengthen tensile strength.With thickness at thin and each expanded graphite sheet 1 of conduct that width is narrower, below for example 5mm about 0.05～0.38mm
1A.
At above-mentioned body material 1
1In use be the flakey natural graphite is expanded after, make it form flaky expanded graphite sheet.At this body material 1
1In the rate of expansion of used expanded graphite more than 40 times, content of graphite is more than 90 weight %, and body material 1
1Density be set in 0.3g/cm
3More than.
In addition, above-mentioned strongthener 2
1Be by natural fibers such as cotton, fiber crops; Nylon, artificial silk, aromatic polyamide, PBI organic fibres such as (polybenzimidazole); Inorganic fibre such as glass, pottery; Line that the fiber of choosing in the steel fibers such as Stainless Steel Fibre, Inconel(nickel alloys) fiber is made constitutes, and in the present embodiment, the line of being made by the diameter Inconel(nickel alloys) 600 that is 0.15mm constitutes splicing thread, and it is embedded in expanded graphite sheet 1
1Each centre of two up and down of A is perhaps held it under the arm with tackiness agent and is buried underground.Strongthener 2
1Can bury many underground.
As shown in Figure 2, body material 1 in the present embodiment
1The surface, with being selected from fiber in the above-mentioned various fiber, by knitting, the covering material 3 that pipe-type woven or method such as tubular knitted are made covers, and constitutes lock packing 4.
The original monomer of the lock packing 4 of said structure or lock packing P is turned round stubborn processing, after perhaps as illustrated in fig. 3 the monomer of six roots of sensation lock packing 4 or P being bundled, carry out turning round about 20 circle/rice and twist processing, carry out rolling forming simultaneously, just can constitute gland seal filler 6.Also can carry out the angle braiding to the monomer of eight above-mentioned lock packing 4 or lock packing P as illustrated in fig. 4, constitute gland seal filler 7, except weaving with the angle, also available interlocking braid.
As shown in Figure 5, also can constitute gland seal filler 16 thus twisting the core body 15A that is processed into and be arranged in the covering cloth 14 by many lock packing 4 or P monomer braiding (for example using tubular knitted) through turning round by the monomer of many above-mentioned lock packing 4 or lock packing P.Also can and cover in the cloth 14 any with lock packing 4 or P core body 15A, its another constitute the gland seal filler with the lock packing of other kinds.In addition, as shown in Figure 6, can also be with eight lock packing 4 or lock packing P monomer, in the core body 15B that square braid is made is arranged on covering cloth 14 with many lock packing 4 or lock packing P monomer braiding (for example through tubular knitted), constitute gland seal filler 17 thus.Also can and cover in the cloth 14 any with lock packing 4 or lock packing P core body 15B, its another constitute the gland seal filler with other lock packing.
Above-mentioned body material 1 or 1
1In the splicing thread buried underground be not limited to cotton material, also can be monofilament, multifilament or yarn.In addition, body material 1 or 1
1In the strongthener buried underground be not limited to the splicing thread of making by above-mentioned multiple fiber, can be to be attached to expanded graphite sheet 1 as shown in Figure 7 also
1On the surface of A, be clipped in multi-disc expanded graphite sheet 1
1Bury the such sheet strongthener 18 of tinsel between each layer of A underground.And this sheet strongthener 18 also can be attached to expanded graphite sheet 1
1On the two sides of A.In addition, the sheet strongthener is attached to expanded graphite sheet 1
1After on the one or both sides of A, it is formed circle, so just can constitute the bar-shaped lock packing that inside has the sheet strongthener.
Fig. 8 is the stereographic map of the embodiment of the another kind of lock packing of the present invention.In this embodiment, with natural fibers such as cotton, fiber crops; Organic fibres such as nylon, artificial silk, aromatic polyamide, PBI; Inorganic fibre such as glass, pottery; The fiber of selecting in the steel fibers such as Stainless Steel Fibre, Inconel(nickel alloys) fiber is for example used 40 aromatic polyamide fibre, forms tubular covering material 19 through knitting, pipe-type woven or tubular knitted etc.On the other hand, be thickness that the expanded graphite sheet of 0.38mm is cut into width below 5mm, longly be the short plate-like tile 20A of the multi-disc about 25mm, these short plate-like tile 20A are arbitrarily made with body material 20, with this body material 20 and above-mentioned strongthener 2
1As illustrated in fig. 9 by making strongthener 2
1Become heart in body material 20 is filled into covering material 19, thereby form lock packing 21.It is identical with the body material 1 of above-mentioned lock packing 4 that the rate of expansion of the expanded graphite of this body material 20, content of graphite and density are set for.This lock packing 21 also situation with above-mentioned lock packing 4 is identical, can be applicable in Fig. 3, Fig. 4, Fig. 5, the gland seal filler shown in Figure 6.
Figure 10 is the stereographic map of the embodiment of the another kind of lock packing of expression the present invention.It is that the expanded graphite sheet 22 that forms the broad more than the 5mm by width is longitudinally folding, promptly is folded into the S font, and the shoestring that has foldable layer 23A, 23B, 23C is constituted as body material 23.Between foldable layer 23A, the 23B of this body material 23,23C, longitudinally be provided with by natural fibers such as cotton, fiber crops; Nylon, artificial silk, organic fibres such as aromatic polyamide, PB worker; Inorganic fibre such as glass, pottery; Line or sheet material that the various fibers of selecting in the steel fibers such as Stainless Steel Fibre, Inconel(nickel alloys) fiber are made for example are the thread many strongtheners 24 of metal of 0.1mm by diameter.On the surface of this body material 23, use by the knitting covering material 25 that wait cloth make cover identical, thereby constitute lock packing 26 with lock packing 4 situations.Wherein, rate of expansion, content of graphite and the density that constitutes the expanded graphite of above-mentioned body material 23 is all set for identical with the body material 1 of above-mentioned lock packing 4.
Also can be as illustrated in fig. 11, form foldable layer 23A, 23B, 23C make its formation band ripple 22A (processing of band gauffer) through fold processing or embossing processing body material 27 with above-mentioned wide cut expanded graphite sheet 22, like this, just can obtain making body material 27 and the stronger lock packing 26 of strongthener 24 bonding forces.
Also can be as shown in figure 12, with the expanded graphite sheet 22 shown in Figure 10, longitudinally folding twice, constitute and to have the body material 28 of foldable layer 23A, 23B, 23C, in addition, also can make above-mentioned expanded graphite sheet 22 longitudinally folding twice, form foldable layer 23A, 23B, 23C, the while forms body material 29 after carrying out above-mentioned corrugated 22A shaping as illustrated in fig. 13.
Figure 14 is the embodiment of the another kind of lock packing of expression the present invention.It is the body material 30 that forms by the narrower expanded graphite sheet of 3mm left and right sides width with from natural fibers such as cotton, fiber crops; Organic fibres such as nylon, artificial silk, aromatic polyamide, PBI; Inorganic fibre such as glass, pottery; Monofilament, multifilament, yarn, sheet plate that the fiber of selecting in the steel fibers such as Stainless Steel Fibre, Inconel(nickel alloys) fiber constitutes, be to be wound in spirrillum under the strongthener 31 contacted states made of the fiber of 0.5～3mm for example with diameter, differently untouched like this or on the surface of body material 30, carry out reverse helically with line 32 again and twine with big helical pitch ground, thus constitute lock packing 33.In this case, rate of expansion, content of graphite and the density etc. that constitute the expanded graphite sheet of body material 30 are all set the body material 1 with above-mentioned lock packing 4 for
1Identical.
Be not limited to be twined with line 32 as illustrated in fig. 14, also can be as shown in figure 15, the covering material 34 that the fiber of selecting from above-mentioned various fibers is made through knitting, pipe-type woven, tubular knitted etc. covers on the body material 30, constitutes lock packing 35.
The body material that is formed by above-mentioned expanded graphite also is not limited to the shape shown in the various embodiments described above, for example also may be selected to the bar-shaped different shape of Denging.
In addition, on Fig. 3, Fig. 4, gland seal filler shown in Figure 5, also can on corresponding surface, flood silicone oil, flaky graphite or rubber adhesive etc. and block materials as required.
As above said, the present invention is owing to be set in the rate of expansion of burying expanded graphite used in the body material of strongthener underground more than 40 times, and the content of expanded graphite is more than 90 weight %, and the density of body material is at 0.3g/cm
3More than, by means of high rate of expansion and high content of graphite, the high-density of expanded graphite, make it form high cohesion, like this, the expanded graphite particles physical adsorption power each other that forms body material is fully guaranteed.Again owing in the body material that this expanded graphite is made, burying strongthener underground, thereby when making sealing material such as gland seal filler,, can prevent the equivalent damage that fractures, chaps of body material effectively promptly in braiding or turn round to twist and add man-hour.And, also because the high content of graphite of the expanded graphite that uses in this body material so can suppress the corrosion that the oxidation of the grey impurity that grades brings, can be guaranteed secular corrosion resistance nature and sealing property.In addition, be not only lock packing,, therefore can improve its use properties even collapse such as the shape of the gland seal filler that is made of this lock packing etc. also is difficult to produce.
Claims (1)
1. lock packing, it has body material that is formed by expanded graphite and the strongthener that is embedded in the body material, it is characterized in that above-mentioned body material uses rate of expansion at the expanded graphite more than 40 times, the while content of graphite is more than 90 weight %, and the density of body material is at 0.3g/cm
3More than.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93105206A CN1038844C (en) | 1993-04-05 | 1993-04-05 | Sealing filler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93105206A CN1038844C (en) | 1993-04-05 | 1993-04-05 | Sealing filler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1093449A CN1093449A (en) | 1994-10-12 |
| CN1038844C true CN1038844C (en) | 1998-06-24 |
Family
ID=4985621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93105206A Expired - Fee Related CN1038844C (en) | 1993-04-05 | 1993-04-05 | Sealing filler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1038844C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2645800B2 (en) * | 1993-12-14 | 1997-08-25 | 日本ピラー工業株式会社 | Expanded graphite seal material, method for producing the same, and gasket sheet |
| TW200535356A (en) * | 2004-03-31 | 2005-11-01 | Nippon Pillar Packing | Expanding graphite yarn, and gland packing |
| JP5760364B2 (en) * | 2010-08-19 | 2015-08-12 | オイレス工業株式会社 | Sphere seal |
| CA2849462C (en) * | 2011-09-26 | 2019-11-26 | A.W. Chesterton Company | Methods and apparatuses for producing a braided dual-sided compression packing seal and methods of using the same |
| CN106286839A (en) * | 2016-08-10 | 2017-01-04 | 袁春华 | A kind of preparation method of pump flexible gasket |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4667969A (en) * | 1986-07-30 | 1987-05-26 | Klinger, A.G. Zug | Packing materials for shaft seals |
| JPH03788A (en) * | 1989-05-29 | 1991-01-07 | Nippon Pillar Packing Co Ltd | Carbon fiber/expanded graphite composite packing and its manufacture |
| JPH04160271A (en) * | 1990-10-25 | 1992-06-03 | Hitachi Chem Co Ltd | Graphite sheet gasket member |
-
1993
- 1993-04-05 CN CN93105206A patent/CN1038844C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4667969A (en) * | 1986-07-30 | 1987-05-26 | Klinger, A.G. Zug | Packing materials for shaft seals |
| JPH03788A (en) * | 1989-05-29 | 1991-01-07 | Nippon Pillar Packing Co Ltd | Carbon fiber/expanded graphite composite packing and its manufacture |
| JPH04160271A (en) * | 1990-10-25 | 1992-06-03 | Hitachi Chem Co Ltd | Graphite sheet gasket member |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1093449A (en) | 1994-10-12 |
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|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 19980624 Termination date: 20100405 |