CN1006655B - Woven elastic seal packing and method for manufacturing same - Google Patents
Woven elastic seal packing and method for manufacturing sameInfo
- Publication number
- CN1006655B CN1006655B CN 88105015 CN88105015A CN1006655B CN 1006655 B CN1006655 B CN 1006655B CN 88105015 CN88105015 CN 88105015 CN 88105015 A CN88105015 A CN 88105015A CN 1006655 B CN1006655 B CN 1006655B
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- filler
- woven
- smis
- elastic seal
- sealing
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Abstract
The invention relates to a sealing filler, particularly to a sealing filler and a manufacturing method thereof. The sealing filler is widely used on a mechanical device storing and conveying a fluid medium in petrol chemical industry, fertilizers, chemical fiber, power generation and atomic industry to be used as a knitted elastic sealing filler used for preventing medium leakage. The filler has the advantages of high elasticity, good tracing ability, wear resistance, corrosion resistance, high pressure resistance and good heat conductivity. The filler can adapt to the work conditions of the sealing parts of high pressure fluid and a higher wire speed. The manufacturing technology is simple. Corresponding compounded fiber, inorganic fiber and elastic materials can be used according to different work conditions to be made into the sealing fillers of different types.
Description
The present invention relates to a kind of stuffing box packing, on particularly a kind of mechanical device that is widely used in storage, conveyance fluid medium in petrochemical industry, chemical fertilizer, chemical fibre, generating, the atomic industry, as Woven elastic seal packing that prevents dielectric leakage and manufacture method thereof.
The braiding stuffing box packing is with the longest history a kind of in the stuffing box packing.Along with development of modern industry, the braiding stuffing box packing has been carried out many innovations and creation at aspects such as forming material, braiding structure, manufacture method.Known stuffing box packing mainly is to be framework material by various synthetic fiber, inorfil, forms through immersion lubrication agent, binder braiding.These materials differ from one another, and when forming filler separately, the characteristic that has then becomes the shortcoming that must overcome.Otherwise, will have influence on the application usefulness and the sealing effect of filler.For example: with the stuffing box packing of teflon fibre braided one-tenth, chemical stability is strong, self lubricity good, and temperature resistant range is wide, intensity is high.Its shortcoming is a poor thermal conductivity, and expansion coefficient is big.If its filler of forming is separately packed in the Stuffing box, stop the leakage of fluid, only tighten gland, intensified pressure makes the also corresponding increasing of warp-wise power of filler, and the leakage problem of fluid just can be resolved.But, produced problem on the other hand thereupon, Here it is because the increasing of warp-wise power has increased frictional heat, cause abrasion big, add its poor thermal conductivity, the defective that expansion coefficient is big, the savings of frictional heat certainly will cause filler to be burnt out, the result of reduction of service life.Equally, have the compressive strength height, good heat conductivity, the carbon fiber of the advantage that self lubricity is strong is formed filler, and also because of tensile breaking strength is low, the shortcoming of tracing ability difference faces the test that is unable to undergo high pressure or strong oxide etch.So just, the filler of only using fiber as framework material, application area and application parameter are fixed on narrower scope.Under the relatively poor situation of the working condition at motive sealing position, because there is the degree of eccentricity in various degree in moving axis, single fiber easily makes its compression deformation ability surpass the performance range of itself, and does not reach the purpose of sealing as the filler of framework material.
Task of the present invention provides a kind of Woven elastic seal packing, not only elasticity is big for it, tracing ability is good, wear-resisting, corrosion-resistant, and the compressive strength height, heat-conductive characteristic is good, the working condition that can adapt to high-pressure liquid sealing position and higher line speed sealing position, its manufacturing process is simple, can select for use corresponding synthetic fiber, inorfil, elastic material to make different types of stuffing box packing according to different operating modes.
Task of the present invention is finished like this: the structure of sealing filler adopts synthetic fiber or inorfil or its to mix to use and is woven into outer foreskin, with the elastic material of uncured as SMIS, with oiling agent and Bond fiberfill fibers space, repressed again, high temperature processing vulcanization forming.Also can adopt and give that to vulcanize and carry out the hollow elastic material that the outer surface pitted skin handles earlier be SMIS,, be shaped with conventional method for sorting again, promptly make Woven elastic seal packing with oiling agent and Bond fiberfill fibers space.The model of this filler, specification are looked the actual working conditions manufacturing at given sealing position.
The manufacture method of filler of the present invention mainly is the requirement according to sealing position applying working condition, and according to the excellent specific property that various lamination coatings and elastic material self possess, rationally advantage is given full play in apolegamy, overcomes the deficiency, to improve the application usefulness of filler.Behind the integrated fiber tuft of lamination coating that apolegamy is good, immersion is furnished with in the mixed solution of oiling agent and binder, after making its surface impregnation one deck liquid, the Ex-all excess liquid is on bolster, solid elastomeric material with uncured is a SMIS, carry out jacket layer braiding or punching with knitting machine and weave and coat outer foreskin, it is in 70～100 ℃ the drying room that the filler that is woven into places temperature, dry 1～2 hour.Dried filler immerses in the mixed solution of being furnished with oiling agent and Bond again, floods 10～30 minutes dryings once more.Dipping, drying are 2～3 times so repeatedly.Then dried filler is placed special mould, pressurization attaches carries out vulcanizing treatment, and pressurize is 15～150 minutes under 150～250 ℃ temperature, naturally cools to room temperature and takes out, and promptly makes Woven elastic seal packing.
The manufacture method of filler of the present invention, also behind the integrated fiber tuft of lamination coating that can apolegamy is good, be woven into cylindric outer foreskin with knitting machine, again its immersion is furnished with in the mixed solution of oiling agent and Bond, make its dipping after 10～30 minutes, the Ex-all excess liquid, in temperature is 70～100 ℃ drying room, dry 1～6 hour.Dipping, drying are 2～3 times so repeatedly.Solid elastomeric material with dried cylindric outer foreskin, coating circumvolution uncured, in the circumvolution process, must be in the neutral position of outer foreskin volume layer as the solid elastomeric material of SMIS, filler after the circumvolution places special mould, pressurization attaches carries out vulcanizing treatment, pressurize is 15～150 minutes under 150～252 ℃ temperature, naturally cool to room temperature and take out, promptly make Woven elastic seal packing.
The manufacture method of filler of the present invention, also can be with the apolegamy integrated fiber tuft of lamination coating well, on bolster, to vulcanize and carry out the hollow elastic material that the outer surface pitted skin handles earlier be SMIS to give, and carries out jacket layer braiding or punching with knitting machine and weave and coat outer foreskin.The filler that is woven into places the mixed solution of being furnished with oiling agent and Bond again, flooded 10～30 minutes, and the Ex-all excess liquid, in temperature is 70～100 ℃ drying room, dry 1～2 hour.Dipping, drying are 2～3 times so repeatedly, then dried filler are shaped with conventional method arrangement, promptly make Woven elastic seal packing.
Woven elastic seal packing of the present invention since raw materials used be actual applying working condition apolegamy according to the sealing position, make full use of the excellent specific property of various lamination coatings, overcome the shortcoming of himself, improved the application usefulness of filler effectively, all obtained new raising at aspects such as high pressure resistant, corrosion-resistant, thermal conductivity.Particularly the braiding structure of outer foreskin has the advantages that to adapt to certain position sealing, and for example the punching braiding structure is applicable on the mechanical device of static and dynamic sealing, and the jacket layer braiding is applicable to the static seal position.Also can adopt the braiding of eight ingots for the little filler of braiding section.But no matter be the outer foreskin that adopts which kind of braiding structure braided packing, the solid elastomeric material that all adopts uncured is as SMIS, after the solid elastomeric material of uncured is coated by outer foreskin, carry out high temperature pressing and attach (it is fixed that applying working condition is neglected in pressurization greatly), make the surface of contact of outer foreskin and SMIS be indenting shape vulcanization forming, make to have enough join strengths between outer foreskin and SMIS, the ectomesoderm foreskin that guarantees to turn round does not produce and comes off.Low for the sealing site pressure, the applying working condition that the degree of eccentricity is big also can adopt the hollow elastic material that gives sulfuration earlier and handle through the outer surface pitted skin as SMIS, can reach running ectomesoderm foreskin equally and not produce the purpose that comes off.Rubber as one of elastic material, its great advantage is that the compression recovery performance spy is excellent, make the stuffing box packing of making that suitable elasticity and good tracing ability be arranged, even sealing surfaces degree of finish is relatively poor, sealed letter is bigger with the Concentricity tolerance of axle, the sealing filler also can remedy the flowing medium that therefore brings and leak, and also can guarantee sealability under comparatively harsh working condition.This Woven elastic seal packing is in sulfidation, because its actual applying working condition difference, pressurization varies in size, thus at a certain temperature the dwell time different in size.The applying working condition that has only definite filler could be formulated processing technology in view of the above, makes the Woven elastic seal packing of high-quality.
Below in conjunction with drawings and Examples the present invention is further described.
Fig. 1 is a kind of concrete structure schematic representation of the present invention's rope form Woven elastic seal packing of having solid SMIS.
Fig. 2 is a kind of concrete structure schematic representation of the present invention's rope form Woven elastic seal packing of having hollow SMIS.
Fig. 3 is a kind of concrete structure schematic representation of woven endless elastic seal packing of the present invention.
Fig. 4 is the cross sectional view of Fig. 3.
Describe concrete structure of the present invention in detail according to Fig. 1～4.The sealing filler is made of outer foreskin 1 and SMIS 2.Wherein Fig. 1 is the rope form stuffing box packing that has solid SMIS, and Fig. 2 is the rope form stuffing box packing that has hollow SMIS.Outer foreskin 1 can be matched according to the actual applying working condition at sealing position and the excellent specific property of various lamination coatings, weaves with knitting machine.SMIS 2 adopts the solid elastomeric material (cross section can just, can justify) of uncured, with oiling agent and Bond fiberfill fibers space, repressed, high temperature processing vulcanization forming.SMIS 2 also can adopt and give sulfuration earlier and make through the hollow elastic material that the outer surface pitted skin is handled.Fig. 3 and Fig. 4 are the structural representations of annular seal filler.As for the various models that adopt and the stuffing box packing of specification,, decide its manufacture method fully according to given sealing position applying working condition.Specify its detailed manufacturing process below in conjunction with embodiment.
Embodiment 1:
The sealing position of rotary dryer rotating shaft adopts the rope form sealing to fill out shape, and its applying working condition is:
Flowing medium: terephthalic acid
Fluid temperature (F.T.): 170 ℃
Hydrodynamic pressure: 20MPa
Linear velocity: 0.5m/s
The turning axle degree of eccentricity: ± 2mm
Filler specification: rope form filler.Cross-sectional dimension 25 * 27(mm)
According to above-mentioned applying working condition, the temperature of flowing medium is than higher and contain solid particle, according to the excellent specific property that various lamination coatings possess, select for use have tensile breaking strength and modulus height, the aramid fibre material of characteristic such as wear resistance is good, good heat resistance.The silicon rubber bar of solid squares of selecting uncured for use is as SMIS, and this is a kind ofly to have very high heat resistance, winter hardiness, corrosion resistance, ageing resistance, high resilience, and the material of higher resistance to pressure is arranged.In the mixed solution that contains oiling agent and Bond that is equipped with; select molybdenum disulfide and ptfe emulsion for use; wherein molybdenum disulfide has high pressure resistant, fluid-resistant flushing; form lubricating film in the lubricant housings very firm; survivable; favourable slip; and that ptfe emulsion has an acid-and base-resisting is strong; friction factor is low; characteristics such as adhesive quality is good, and have good high-and low-temperature resistance characteristic, it had both had the effect as viscose fibre; play space between fiberfill fibers and the fiber again, the effect of protection fiber.
The manufacture method of this filler is: earlier with the integrated fiber tuft of 3000 hole aramid fibre materials, its immersion is furnished with in the mixed solution of molybdenum disulfide and ptfe emulsion, after making its surface impregnation one deck liquid, the Ex-all excess liquid is on bolster, with the cross section of uncured be 19 * 21(mm) solid squares silicon rubber bar as SMIS, carry out jacket layer with knitting machine and weave and coat outer foreskin.It is 80 ℃ drying room inner drying 2 hours that the filler that is woven into places temperature, immerses once more in the mixed solution 30 minutes, and then dry, so repeatedly dipping, dry 2～3 times.At last dried filler being placed cross section is the pressurization that heats up of 25 * 27(mm) mould, when temperature rises to 180 ± 10 ℃, pressurize is 50～60 minutes under the pressure of 40MPa, naturally cools to room temperature again and takes out, and promptly makes the rope form Woven elastic seal packing.The aramid fibre that consists of of this filler accounts for 10% of gross weight, and silicone rubber accounts for 60% of gross weight, and molybdenum disulfide accounts for 1% of gross weight, and ptfe emulsion accounts for 29% of gross weight.
Embodiment 2:
Annular packing is adopted in the high pressure major diameter rotation water seal that the coal mine tunneling machine internal spraying is used, and its applying working condition is:
Flowing medium: clear water
Fluid temperature (F.T.): 50 ℃
Hydrodynamic pressure: 20MPa
Spindle speed: 50 rev/mins
Filler specification: annular packing φ 180 * φ 150 * 20(mm).Because the sealing ring requires the compressive strength height, tracing ability is good, and is corrosion-resistant, so we have selected friction factor little, thermal conductivity and self lubricity are good, and high voltage bearing carbon fiber adopts elastic material silicone rubber and molybdenum disulfide and the ptfe emulsion identical with embodiment 1.
The manufacture method of this filler is: earlier with the integrated fiber tuft of 1000 hole carbon fibre materials, be woven into the cylindric outer foreskin that girth is 480mm with knitting machine, then its immersion is furnished with in the mixed solution of molybdenum disulfide and ptfe emulsion, make its dipping 20 minutes, the Ex-all excess liquid, put into temperature and be 100 ℃ drying room, dry 6 hours, dipping, drying are 2～3 times so repeatedly, with dried cylindric outer foreskin, the specification that coats the circumvolution uncured is the falope of φ 114 * φ 156 * 14.In the circumvolution process, must be in the neutral position of outer foreskin volume layer as the falope of SMIS.Filler after the circumvolution places the mould of φ 180 * φ 150 * 20(mm) to heat up and pressurizes, and when temperature rose to 200 ± 10 ℃, pressurize was 60～80 minutes under the pressure of 55MPa, naturally cools to room temperature and takes out, and promptly makes the woven endless elastic seal packing.The carbon fiber that consists of of this filler accounts for 15.3% of gross weight, and silicone rubber accounts for 19.6% of gross weight, and molybdenum disulfide accounts for 0.6% of gross weight, and teflon accounts for 64.5% of gross weight.
Embodiment 3:
Chemical plant tri-coupling type high-pressure ammonia pump seal ring adopts annular packing, and its applying working condition is:
Flowing medium: liquefied ammonia
Fluid temperature (F.T.): 40 ℃
Hydrodynamic pressure: 16.5MPa
Plunger reciprocal time: 151 times/minute
Filler specification: annular packing φ 115 * φ 95 * 13(mm)
According to the applying working condition requirement, except that selecting the lamination coating identical with embodiment 2, molybdenum disulfide, ptfe emulsion for use, elastic material is selected the ethylene propylene rubber that ageing resistance is good, acidproof, alkaline-resisting, elasticity is high for use.
The manufacture method of this filler: earlier with the integrated fiber tuft of 1000 hole carbon fibre materials, being woven into girth with knitting machine is the cylindric outer foreskin of 360mm, and its dipping, drying process are with embodiment 2.With dried cylindric outer foreskin, the specification that coats the circumvolution uncured is the ethylene propylene rubber ring of φ 109 * φ 101 * 7(mm) then.In the circumvolution process, must be in the neutral position of outer foreskin volume layer as the falope of SMIS.Filler after the circumvolution places the mould of φ 115 * φ 95 * 13(mm) to heat up and pressurizes, and when temperature rose to 140 ± 10 ℃, pressurize was 15～20 minutes under the pressure of 50MPa, naturally cools to room temperature and takes out, and promptly makes the woven endless elastic seal packing.The carbon fiber that consists of of this filler accounts for 18.8% of gross weight, and ethylene propylene rubber accounts for 10% of gross weight, and molybdenum disulfide accounts for 0.6% of gross weight, and teflon accounts for 70.6% of gross weight.
Embodiment 4:
Hollow rope form stuffing box packing is adopted at the sealing position of rotary dryer rotating shaft, and its applying working condition is:
Flowing medium: the gas that contains solid particle
Fluid temperature (F.T.): 140 ℃
Hydrodynamic pressure: 0.1MPa
The turning axle degree of eccentricity: ± 4mm
Linear velocity: 3m/s
The filler specification: rope form filler cross section is φ 25mm
According to above-mentioned applying working condition, the sealing position of this filler is low at pressure, under the big service condition of the degree of eccentricity.Selecting for use of its material substantially with embodiment 1.
The manufacture method of this filler is: earlier with the integrated fiber tuft of 3000 hole aramid fibre materials, on bolster, to vulcanize and carry out the hollow silicone rubber tube (tube section is φ 19 * φ 7) that the outer surface pitted skin handles earlier be SMIS to give, and carries out jacket layer with knitting machine and weave and coat outer foreskin.The filler that is woven into places the mixed solution of being furnished with molybdenum disulfide and ptfe emulsion again, floods after 30 minutes, and the Ex-all excess liquid, in temperature is 80 ℃ drying room, dry 2 hours.Dipping, drying are 2～3 times so repeatedly, then dried filler are shaped with conventional method arrangement, promptly make Woven elastic seal packing.The composition aramid fibre of this filler accounts for 5% of gross weight, and carbon fiber accounts for 15% of gross weight, and elastic material silicone rubber accounts for 50% of gross weight, and molybdenum disulfide accounts for gross weight 1%, and ptfe emulsion accounts for 29% of gross weight.
Claims (4)
1, be the braiding stuffing box packing that has that outer foreskin and the polytetrafluoroethylplastic plastic that adopts fiber to be woven into made as SMIS, the present invention is a kind of Woven elastic seal material; It is characterized in that described SMIS adopts the solid rubber material of uncured or employing to give the hollow rubber material that vulcanizes earlier and carry out the processing of outer surface pitted skin, with oiling agent and Bond fiberfill fibers space, repressed again, high temperature processing vulcanization forming.
2, a kind of manufacture method of Woven elastic seal packing, adopt lamination coating, be woven into the stuffing box packing that has SMIS with knitting machine, it is characterized in that applying working condition according to the sealing position, the excellent specific property that possesses according to synthetic fiber or inorganic fibers self, the integrated fiber tuft of lamination coating that apolegamy is good: immerse and be furnished with in the mixed solution of oiling agent and Bond, solid rubber material with uncured is a SMIS, carrying out jacket layer braiding or punching with knitting machine weaves and coats outer foreskin, flood then, operations such as drying are handled or are coated the unvulcanized rubber of circumvolution as SMIS with the material that is woven into tubular, make it twist in the neutral position.Place special mould, pressurization attaches carries out vulcanizing treatment pressurize 15～150 minutes under 150～250 ℃ temperature, naturally cooling to room temperature takes out, promptly make Woven elastic seal packing, the also available rubber that has vulcanized carries out pitted skin to be handled, and weaves operations such as dipping, drying then and makes elastic seal packing.
3, manufacture method according to claim 2, adopt lamination coating, be woven into the stuffing box packing that has SMIS with knitting machine, it is characterized in that applying working condition according to the sealing position, the excellent specific property that possesses according to synthetic fiber or inorganic fibers self, rationally match, the integrated fiber tuft of lamination coating that apolegamy is good, be woven into cylindric outer foreskin with knitting machine, then its immersion is furnished with in the mixed solution of oiling agent and Bond, with dried cylindric outer foreskin, coat the solid rubber material of circumvolution uncured, in the circumvolution process, must be in the neutral position of outer foreskin volume layer as the rubber material of SMIS, filler after the circumvolution places special mould, press vulcanization is handled, naturally cool to room temperature and take out, promptly make the Woven elastic seal material.
4, will match the good integrated fiber tuft of lamination coating according to right 2 described manufacture methodes, to vulcanize and carry out the hollow rubber material that the outer surface pitted skin handles earlier be SMIS to give, carrying out jacket layer braiding or punching with knitting machine weaves and coats outer foreskin, the filler that is woven into places the mixed solution of being furnished with oiling agent and Bond again, then dried filler is shaped with conventional method arrangement, promptly makes Woven elastic seal packing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88105015 CN1006655B (en) | 1988-01-29 | 1988-01-29 | Woven elastic seal packing and method for manufacturing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88105015 CN1006655B (en) | 1988-01-29 | 1988-01-29 | Woven elastic seal packing and method for manufacturing same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN88105015A CN88105015A (en) | 1988-07-27 |
| CN1006655B true CN1006655B (en) | 1990-01-31 |
Family
ID=4833249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88105015 Expired CN1006655B (en) | 1988-01-29 | 1988-01-29 | Woven elastic seal packing and method for manufacturing same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1006655B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777605A (en) * | 2012-08-06 | 2012-11-14 | 江苏润洲塑胶有限公司 | Seal ring of roller |
| CN105134958A (en) * | 2015-08-11 | 2015-12-09 | 哈尔滨工业大学 | High-temperature dynamic sealing structure and design method thereof |
| CN112109406B (en) * | 2020-09-22 | 2022-04-12 | 航天特种材料及工艺技术研究所 | Low-heat-conductivity high-air-resistance heat sealing material and preparation method thereof |
-
1988
- 1988-01-29 CN CN 88105015 patent/CN1006655B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN88105015A (en) | 1988-07-27 |
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