CN102899743B - Heating device for drying densification of polyacrylonitrile-based carbon fiber precursor - Google Patents
Heating device for drying densification of polyacrylonitrile-based carbon fiber precursor Download PDFInfo
- Publication number
- CN102899743B CN102899743B CN201210376085.4A CN201210376085A CN102899743B CN 102899743 B CN102899743 B CN 102899743B CN 201210376085 A CN201210376085 A CN 201210376085A CN 102899743 B CN102899743 B CN 102899743B
- Authority
- CN
- China
- Prior art keywords
- roller
- main shaft
- connecting ring
- ring
- installation sleeve
- 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.)
- Active
Links
Landscapes
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a heating device for drying densification of a polyacrylonitrile-based carbon fiber precursor, characterized in that: a gear case is arranged at the central portion of the main shaft; a roller and a slip ring are respectively arranged at the two sides of the gear case; the roller is positioned at one end of the main shaft, and the slip ring is fixed at the other end of the main shaft; the gears are arranged close to the side of the slip ring in the gear case; a wiring ring installing sleeve of the roller is sleeved on the main shaft and fixed on the main shaft, and a heating pipe sleeve is arranged between the case of the roller and the wiring ring installing sleeve and is sleeved on the wiring ring installing sleeve; an outer wiring ring and an inner wiring ring are respectively fixed at the end surfaces of the wiring ring installing sleeve; the end surface of the heating pipe sleeve is uniformly provided with a plurality of heating pipe installing holes and radiating holes. According to the invention, electrical heating pipes with same power are uniformly distributed in the roller, thus the temperature uniformity of the roller surface is good, the operational temperature range is relative wide, and the technological requirements of precursor drying densification can be satisfied; the requirement on the electrical system used herein is low, the control precision is high, the heat stability is good, the uniformity of the temperature of the roller surface is raised, thus the quality and the quality stability of the polyacrylonitrile precursor are effectively raised.
Description
Technical field
The present invention relates to a kind of polyacrylonitrile base carbon fiber precursors compacting by drying heater.
Background technology
Polyacrylonitrile-based carbon fibre is widely used in the fields such as Aero-Space, national defense construction because the excellent specific properties such as its high specific strength, high ratio modulus, heat-resisting, corrosion-resistant, endurance, creep resistant are used as a kind of reinforcing material, is the necessary strategic materials of Aero-Space, national defense construction.The main raw material of high-performance polyacrylonitrile-based carbon fiber is polyacrylonitrile fibril, and the quality of precursor is determining the quality of final carbon fiber to a great extent.
Precursor in process of production, fiber after boiling water drawing-off is in swollen state and multi-hole state, this microstructure is unfavorable for further high drafting, by the compacting by drying operation under some tension, can make space closed, it is fine and close that the network structure of fiber becomes, this be improve of polyacrylonitrile-based carbon fibre mechanical property important with requisite step.Compacting by drying temperature must be higher than the glass transition temperature of as-spun fibre, but will be lower than thermo-color temperature (by white to micro-yellow).General compacting by drying 1～10min at 120 ℃～170 ℃.
At present polyacrylonitrile base carbon fiber precursors compacting by drying is adopted to Steam Heating mode conventionally, this mode can guarantee the roll surface temperature uniformity, but temperature is wayward, fluctuation is larger, the swivel joint of equipment itself, backwater steam trap etc. are partly prone to fault, draw in silk operation, the steam of excess pressure also easily causes the security incidents such as scald.
Summary of the invention
In order to overcome, the comparison in equipment existing in prior art is complicated, the uppity problem of temperature, the present invention proposes a kind of polyacrylonitrile base carbon fiber precursors compacting by drying heater.
The present invention includes roller, main shaft, heating tube, platinum resistance thermometer sensor,, external wire loop, internal wiring ring, slip ring, gear-box and motor.Gear-box is positioned at the middle part of main shaft.Roller and slip ring are arranged on main shaft, and lay respectively at gear-box both sides.Described roller is positioned at one end of gear-box, and slip ring is fixed on the other end of gear-box.Gear is positioned at gear-box near slip ring one side.
Described roller comprises housing, heating pipe box, connecting ring installation sleeve and end plate, and connecting ring installation sleeve is set with and is fixed on main shaft, heats pipe box between the housing and connecting ring installation sleeve of roller, and is sleeved on connecting ring installation sleeve.External wire loop and internal wiring ring are separately fixed at the end face of connecting ring installation sleeve, and external wire loop is positioned at the outer rim place of described connecting ring installation sleeve end face, and internal wiring ring is positioned at the inner edge place of described connecting ring installation sleeve end face.
Outer rim place at heating pipe box end face is evenly equipped with a plurality of heating tube installing holes.At wiring ring set end face, be evenly equipped with a plurality of louvres.
The quantity of described heating tube is definite according to formula P * t=C * m * △ t, and wherein P is heating tube power, and unit is W.T is heated to the needed time of assigned temperature, and unit is S.C is heat-conducting medium specific heat capacity, and m is the quality of heat-conducting medium, and unit is Kg.△ t is the changing value of temperature, and unit is ℃.
The power line hole that has perforation in described main shaft.Power line is positioned at this power line hole, and one end is connected with the rotor of slip ring, and the other end is connected with connecting ring.The stator of described slip ring is connected with electric control unit by wire.
The center line of described louvre and described heating tube installing hole is all parallel with the center line of main shaft.
On connecting ring and internal wiring ring, there is respectively an electric power incoming line hole outside.
Interference engagement between the inner surface of the outer surface of described connecting ring installation sleeve and heating pipe box.Interference engagement between the heating outer surface of pipe box and the inner surface of roller housing.
The present invention carries out electrical heating by heating tube pair roller barrel, the identical electric heating tube of watt level is uniformly distributed in roller, make roll surface temperature good evenness, operating temperature range is wider, after hot water drawing-off and the strand of oil agent, moisture is greatly about 30%～50%(mass fraction) between, the moisture after this example device compacting by drying is below 0.5%, can meet precursor compacting by drying technological requirement completely.
The present invention adopts electrically heated mode pair roller barrel to heat, because used electrical system requirement is lower, and control accuracy is high, Heat stability is good, improve the uniformity of roll surface temperature, thereby effectively improved quality and the quality stability of polyacrylonitrile fibril.
Accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present invention;
Accompanying drawing 2 is plan structure schematic diagrames of the present invention;
Accompanying drawing 3 is roller schematic diagrames of the present invention.In figure:
1. roller 2. heating tube 3. main shaft 4. gear-box 5. driving gear 6. slip rings
7. motor 8. slip ring containment vessels 9. heat external wire loop 11. end cap fixing hole 12. platinum resistance thermometer sensor,s of pore 10.
13. internal wiring ring 14. heating pipe box 15. connecting ring installation sleeve 16. end plate 17. louvre 18. locknuts
The specific embodiment
The present embodiment is for polyacrylonitrile base carbon fiber precursors compacting by drying heater, as shown in Figure 1 and Figure 2, comprises roller 1, main shaft 3, heating tube 2, platinum resistance thermometer sensor,, external wire loop 10, internal wiring ring 13, slip ring 6, gear-box 4 and motor 7.
In the present embodiment, roller 1, gear 5 and slip ring 6 are arranged on respectively on main shaft 3, and wherein, gear-box 4 is positioned at the middle part of main shaft 3, and is arranged on main shaft by bearing.Roller 1 and slip ring 6 lay respectively at the two ends of gear-box 4, and roller 1 is positioned at main shaft 3 one end, and are fixed on main shaft 3; The lock-screw that slip ring 6 carries by itself is fixed on the main shaft other end.Gear 5 is positioned at gear-box 4 near slip ring 6 one sides, by key, is fixed on main shaft.
The power line hole that has perforation in described main shaft, and this power line hole is concentric with main shaft.Power line is arranged in this power line hole, and one end is connected with the rotor of slip ring 6, and the other end is connected with connecting ring.The stator of described slip ring 6 is connected with electric control unit by wire.
Motor 7 is positioned at the outer side of gear-box.The output shaft of motor 7 is positioned at gear-box.Be positioned at driving gear and driven gear 5 engagements that are positioned at gear-box on motor output shaft, thereby drive main shaft 3 to rotate.
As shown in Figure 3, described roller 1 comprises housing, heating pipe box 14, connecting ring installation sleeve 15 and end plate 16.
Described connecting ring installation sleeve 15 and heating pipe box 14 are all positioned at the housing of roller, and connecting ring installation sleeve 15 suits are also fixed on main shaft by locknut 18, heat pipe box 14 between the housing and connecting ring installation sleeve 15 of roller, and be sleeved on connecting ring installation sleeve 15.External wire loop 10 and internal wiring ring 13 are separately fixed at the end face of connecting ring installation sleeve 15, and external wire loop 10 is positioned at the outer rim place of described connecting ring installation sleeve 15 end faces, and internal wiring ring 13 is positioned at the inner edge place of described connecting ring installation sleeve 15 end faces.On the end face of the connecting ring installation sleeve 15 between connecting ring 10 and internal wiring ring 13, be evenly equipped with outside the louvre 17 of a plurality of perforations.On connecting ring 10 and internal wiring ring 13, have respectively an electric power incoming line hole outside, power line penetrates this electric power incoming line hole and is connected with this residing connecting ring in electric power incoming line hole.
On the end face of heating pipe box 14, be evenly equipped with a plurality of blind holes, for heating tube 2 is installed.The center line of described louvre 17 and described heating tube 2 is all parallel with the center line of main shaft.Interference engagement between the inner surface of the outer surface of described connecting ring installation sleeve 15 and heating pipe box 14; Interference engagement between the heating outer surface of pipe box 14 and the inner surface of roller 1 housing.
End cap 16 has 2, is separately fixed at the two ends of roller 1 housing, and described connecting ring installation sleeve 15 and heating pipe box 14 are enclosed in roller 1.
The quantity basis roller surface temperature process of described heating tube 2 requires definite, and according to P * t=C * m * △ t, wherein P is heating tube power, and unit is W; T is heated to the needed time of assigned temperature, and unit is S; C is heat-conducting medium specific heat capacity, and m is the quality of heat-conducting medium, and unit is Kg; △ t is the changing value of temperature, and unit is ℃; According to the difference of roll surface temperature technological parameter, can select the heating tube of different capacity and varying number to realize different requirements.In the present embodiment, t is that 15min is 900S by technological requirement, and the specific heat capacity C of aluminium is 0.88 * 10
3, temperature change value is 150 ℃, according to P * t=C * m * △ t, can obtain P=1466.67W, and heating tube 2 power used in this example are 150W, and quantity is 12.
The quantity of described louvre 17 is 8～16, and in the present embodiment, the quantity of louvre 17 is 12.
On the end face of heating pipe box 14,1 platinum resistance thermometer sensor, 12 is installed.Described platinum resistance thermometer sensor, 12 is between any two heating tubes 2.The wire of described platinum resistance thermometer sensor, 12, through main shaft 3 central through holes, is connected with the rotor of slip ring 6.
During installation, 12 heating tubes 2 are respectively charged into respectively and are heated in pore.The live wire end of electric power incoming line is connected with internal wiring ring 13, the live wire end of 12 heating tubes is also connected with internal wiring ring 13 respectively simultaneously; The zero line side of electric power incoming line is connected with external wire loop 10, the zero line side of 12 heating tubes is also connected with external wire loop 10 respectively simultaneously; By above-mentioned connection, make 12 heating tube parallel operations.
Roller in the present embodiment is three-decker, roller diameter φ 220mm, and thickness is 160mm, and center is porose, and centre bore is point diameter φ 45mm, the bellmouth of rear end diameter phi 50mm; Centered by roller ground floor, hole is to φ 122mm place, and ground floor material is heatproof bakelite, in the hole of uniform 12 the φ 12mm in the φ of bakelite 86mm place, for heat radiation, at the φ of ground floor 62mm and φ 110mm place, connecting ring is housed respectively; The roller second layer is φ 122mm to φ 206mm place, and second layer material is ZL101, at φ 163mm place uniform 12 for the φ 12mm circular hole of heating tube is installed, two holes of leaving 1 dark 50mm of φ 4mm in the middle of holes are for installing platinum resistance thermometer sensor, therein; The 3rd layer of roller is φ 206mm to φ 220mm place, is the superficial layer of roller, and its material is 0Cr18Ni9; Roller two ends are all provided with cover plate.
Described spindle material is 40Cr, connection teeth roller box, roller and slip ring, for transmission, front-end of spindle 28mm is M32 * 1.5 external screw thread and locknut, for fixing roller, the alignment of shafts is the through hole of φ 12mm, and from then on the stube cable of heating tube, platinum resistance thermometer sensor, passes in hole, is connected to slip ring.
Described heating tube is single head stainless steel heating tube, single power is about 220VAC 150W, 12 altogether, is distributed on roller φ 163mm place, while connecing power line, the live wire of every heating tube is terminated on roller φ 62mm connecting ring, zero line side is received on roller φ 110mm connecting ring.
Described platinum resistance thermometer sensor, calibration number is Pt100, diameter phi 4mm, and long 50mm, inserts in roller φ 163mm preformed hole, for measuring roller temperature.
Described connecting ring has two, is arranged on respectively roller φ 62mm and φ 110mm place, and its material is LY12, is the annulus of 8mm * 8mm, two connecting rings be all evenly equipped with 12 M4 through holes for wiring and 3 M5 through holes for connecting ring is fixed on to roller.
Power supply and signal conduction when described slip ring is used for solving roller rotation, the feed cable that connects out from roller connecting ring and platinum resistance thermometer sensor, cable are received the rotor-side of slip ring, and stator side cable is received respectively electric power incoming line and control terminal, and slip ring is equipped with containment vessel.
Described gear-box is 304 stainless steels, and two gears are equipped with in inside, and one is connected with motor, and another is to be connected with main shaft, completes power transmission.
Described motor is common servomotor.
During work, tow is wrapped in to roller surface, cornerite installs Passive Positioning roller additional according to technological requirement and regulates, adjustable flexibly to realize drying time, and surface temperature can arbitrarily regulate in room temperature to 180 ℃.
Claims (4)
1. a polyacrylonitrile base carbon fiber precursors compacting by drying heater, is characterized in that, comprises roller, main shaft, heating tube, platinum resistance thermometer sensor,, external wire loop, internal wiring ring, slip ring, gear-box and motor; Gear-box is positioned at the middle part of main shaft; Roller and slip ring are arranged on main shaft, and lay respectively at gear-box both sides; Described roller is positioned at main shaft one end, and slip ring is fixed on the main shaft other end; Gear is positioned at gear-box near slip ring one side; The power line hole that has perforation in described main shaft; Power line is positioned at this power line hole, and one end is connected with the rotor of slip ring, and the other end is connected with connecting ring; The stator of described slip ring is connected with electric control unit by wire; Described roller comprises housing, heating pipe box, connecting ring installation sleeve and end plate, and connecting ring installation sleeve is set with and is fixed on main shaft, heats pipe box between the housing and connecting ring installation sleeve of roller, and is sleeved on connecting ring installation sleeve; External wire loop and internal wiring ring are separately fixed at the end face of connecting ring installation sleeve, and external wire loop is positioned at the outer rim place of described connecting ring installation sleeve end face, and internal wiring ring is positioned at the inner edge place of described connecting ring installation sleeve end face; Outer rim place at heating pipe box end face is evenly equipped with a plurality of heating tube installing holes, at the inner edge place of heating pipe box end face, is evenly equipped with a plurality of louvres;
The quantity of described heating tube is definite according to formula P * t=C * m * △ t, and wherein P is heating tube power, and unit is W; T is heated to the needed time of assigned temperature, and unit is s; C is heat-conducting medium specific heat capacity, and m is the quality of heat-conducting medium, and unit is kg; △ t is the changing value of temperature, and unit is ℃.
2. a kind of polyacrylonitrile base carbon fiber precursors compacting by drying heater as claimed in claim 1, is characterized in that, the center line of described louvre and described heating tube installing hole is all parallel with the center line of main shaft.
3. a kind of polyacrylonitrile base carbon fiber precursors compacting by drying heater as claimed in claim 1, is characterized in that on connecting ring and internal wiring ring, having respectively an electric power incoming line hole outside.
4. a kind of polyacrylonitrile base carbon fiber precursors compacting by drying heater as claimed in claim 1, is characterized in that, interference engagement between the outer surface of described connecting ring installation sleeve and the inner surface of heating pipe box; Interference engagement between the heating outer surface of pipe box and the inner surface of roller housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210376085.4A CN102899743B (en) | 2012-10-08 | 2012-10-08 | Heating device for drying densification of polyacrylonitrile-based carbon fiber precursor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210376085.4A CN102899743B (en) | 2012-10-08 | 2012-10-08 | Heating device for drying densification of polyacrylonitrile-based carbon fiber precursor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102899743A CN102899743A (en) | 2013-01-30 |
| CN102899743B true CN102899743B (en) | 2014-07-23 |
Family
ID=47572221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210376085.4A Active CN102899743B (en) | 2012-10-08 | 2012-10-08 | Heating device for drying densification of polyacrylonitrile-based carbon fiber precursor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102899743B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104178790A (en) * | 2014-08-19 | 2014-12-03 | 中复神鹰碳纤维有限责任公司 | Carbon fiber surface treatment method and treatment device |
| CN104233513B (en) * | 2014-09-30 | 2017-05-17 | 安庆安纳特种纤维有限公司 | Chemical fiber densifying all-in-one machine and densifying method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2500692Y (en) * | 2001-11-20 | 2002-07-17 | 上海市合成纤维研究所 | Equipment for drying densifying of polyacrylonitrile fibre presoma |
| CN1668552A (en) * | 2002-07-12 | 2005-09-14 | 马塞尔-布加蒂股份有限公司 | Method and an installation for subjecting carbon fabrics to high temperature heat treatment and to densification by chemical vapor infiltration |
| CN102041564A (en) * | 2010-12-03 | 2011-05-04 | 西安航科等离子体科技有限公司 | Drying device and method for spinning fiber tow |
-
2012
- 2012-10-08 CN CN201210376085.4A patent/CN102899743B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2500692Y (en) * | 2001-11-20 | 2002-07-17 | 上海市合成纤维研究所 | Equipment for drying densifying of polyacrylonitrile fibre presoma |
| CN1668552A (en) * | 2002-07-12 | 2005-09-14 | 马塞尔-布加蒂股份有限公司 | Method and an installation for subjecting carbon fabrics to high temperature heat treatment and to densification by chemical vapor infiltration |
| CN102041564A (en) * | 2010-12-03 | 2011-05-04 | 西安航科等离子体科技有限公司 | Drying device and method for spinning fiber tow |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102899743A (en) | 2013-01-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102361090B (en) | Method of preparing carbon substrate for gas diffusion layer of polymer electrolyte fuel cell, carbon substrate prepard by using the method, and system for manufacturing the same | |
| CN101994169B (en) | Continuous silicon carbide fiber preparation method and production device | |
| CN105088420B (en) | The preparation method of high heat conduction pitch graphite fibre | |
| CN102899743B (en) | Heating device for drying densification of polyacrylonitrile-based carbon fiber precursor | |
| CN102051711A (en) | Process for producing polyacrylonitrile based carbon fibers | |
| CN102912477A (en) | Production equipment for polyacrylonitrile-based carbon fiber (PAN-CF) | |
| CN105063807B (en) | Preparation method of high-intensity intermediate modulus carbon fiber | |
| US8703091B2 (en) | High modulus graphite fiber and manufacturing method thereof | |
| CN102943331B (en) | Industrialized polyimide fiber drafting method | |
| CN108203848A (en) | A kind of hot high modulus pitch-based carbon fiber of high-strength highly-conductive and preparation method thereof | |
| CN109402795A (en) | Improve the method for pre-oxidizing and equipment of carbon fiber mechanical property | |
| CN108251919A (en) | A kind of interval adds continuous Pitch-Based Graphite Fibers filament preparation process | |
| EP3288339B1 (en) | Induction heating roller | |
| CN104153020A (en) | Cantilever type oil and electric heating filament drying device | |
| CN209624212U (en) | A kind of carbon fiber sheath performance test machine hypervelocity device | |
| CN104903500A (en) | Precursor fiber for carbon fibers, carbon fiber, and method for producing carbon fiber | |
| Liu et al. | Influence of External Tension on the Structure and Properties of Melt‐Spun PAN Precursor Fibers during Thermal Oxidation | |
| CN215757750U (en) | Laboratory is with small-size haplopore melt spinning machine | |
| CN109402794B (en) | Apparatus and heat treatment method for weakening skin-core structure in carbon fiber | |
| CN112176458B (en) | Preparation method of asphalt-based carbon fiber | |
| CN205529176U (en) | A drafting arrangement for carbon fiber preliminary heat treatment in oxidizing processing | |
| CN103213290B (en) | Hot oil type tubular heater | |
| CN104451963A (en) | Pre-oxidizing experimental device for carbon fiber precursor | |
| CN209584433U (en) | A kind of high-temperature shaping device | |
| CN208829897U (en) | Fibre single thread dried coating film device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |