CN104842577B - single-screw extruder - Google Patents
single-screw extruder Download PDFInfo
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- CN104842577B CN104842577B CN201510269465.1A CN201510269465A CN104842577B CN 104842577 B CN104842577 B CN 104842577B CN 201510269465 A CN201510269465 A CN 201510269465A CN 104842577 B CN104842577 B CN 104842577B
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- screw extruder
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Abstract
The invention discloses a kind of single-screw extruder, it comprises frame, bearing chamber, transition axis, seal bootr, charging aperture, discharging cover, discharging opening, the spiral axis of cone etc., one end of the described spiral axis of cone is connected with transition axis spindle nose is bushing through the left side of seal bootr, and it is interior and overlap movable cantilever with discharging and be connected that spiral axis of cone other end exit side is arranged on discharging cover; The spiral axis of cone is provided with multiple helical blade, between the spiral axis of cone and seal bootr, is provided with sieve plate; The shape of the described spiral axis of cone is that diameter first diminishes the displacement taper becoming large afterwards from feed end to discharge end; The pitch of helical blade becomes large gradually from feed end to discharge end, and the axis of cone diameter near first blade place of discharging cover is 396-398mm, and the axis of cone diameter near the 3rd blade place of discharging cover is 386-392mm; The shape of described discharging cover is cylindrical shape, and internal diameter is 400-406mm, and the spacing of discharging cover and the spiral axis of cone is 7-10mm; It has express material, and to tear dehydrating effect good, and the spiral axis of cone such as not easily to be worn and torn at the advantage.
Description
Technical field
The present invention relates to express material and tear dehydration equipment, be specifically related to a kind of single-screw extruder tearing dehydration for express material in chemical-mechanical pulping.
Background technology
Screw extruder is a kind of mechanical presses dewater unit, and the sheet material large to multiple water content has good dehydrating effect.Its operation principle works as motor driving reducer, after helical axis works well, material evenly adds from material feeding box, enter the material of skewed slot, along helicla flute forward under helical blade thrust, material is advanced to change pitch and spiral shell footpath, in the extruded segment process that helical blade is formed, be subject to changing pitch, spiral shell footpath, the effect of helical blade and pressure screen frame, by the VFC of motor, form larger controllable moment of torsion, at the active force such as extruding force and frictional force extrusion dehydration, water, tiny wood is cut, flow out outside body by screen cloth filter opening, remaining compacting, extruding, tear material through spiral outlet, annulus between cavity mutually extrudes and discharges respectively, thus complete whole mechanical presses dehydration.
But, the screw extruder occurred in the market generally dewaters for material, not clearly to the tearing effects of material, be particularly be difficult to extruding to tear into the material of loose soft shape for the screw extruder that the larger employing of some material density is current, the normal production of slurrying production technology cannot be met; And have strong extrusion friction effect due to helical axis and wood chip, and cause surface, the higher-pressure region of helical axis because easily wearing and tearing by strong extruding force effect, especially more serious in the wearing and tearing of cone section spindle nose end, its abrasive resistance is poor, service life is short, and maintenance cost is high, and costs and poor dehydration results torn by material.Therefore, for the deficiency that existing screw extruder exists, the critical component helical axis of screw extruder is improved, dehydrating effect is torn to the extruding improving screw extruder, improve service life of equipment, reduce maintenance cost and be necessary.
Domestic patent database disclosed some patented technologies about single-screw extruder in recent years:
Such as: patent document [application number] CN200620030675.1, open (bulletin) number [CN2918507Y], this publication discloses one " screw extruder ".This screw extruder, comprise filter plate, main shaft and on helical blade, screw extruder has following a kind of structure at least: a) diameter of filter plate is by diminishing gradually greatly from feed end to discharge end, and b) pitch of helical blade diminishes gradually from feed end to discharge end.From feed end to the diameter of discharge end filter plate from large to small, from large to small, major axis diameter from large to small for the pitch of helical blade.The direct connection for transmission mechanism of major axis diameter of this utility model helical blade, easy wearing and tearing, affect the service life of equipment, simultaneously, the pitch of helical blade from large to small, from large to small, the dynamics that this project organization material is torn along with frictional force extruding extrudes in discharge end moving process is large not, and tearing effects is not good for major axis diameter.
Such as: patent document [application number] CN201320804575.X, open (bulletin) number [CN203629209U], this publication discloses " a kind of reducing single-screw shaft squeezing machine ".This reducing single-screw shaft squeezing machine comprises frame, drive unit, the feeding assembly being arranged at frame two ends and discharge component, is arranged at the conical screen cage in frame and is installed on and sieve in cage and the coaxial driving rotating shaft arranged, described driving rotating shaft one end is connected with drive unit, described driving rotating shaft is provided with helical blade, described helical blade diameter diminishes gradually with conical screen cage internal diameter, described driving rotating shaft diameter reduces with sieve cage internal diameter and becomes large gradually, and described helical blade pitch shortens greatly and gradually with driving the change of rotating shaft diameter.The helical blade diameter of this utility model diminishes gradually, and the dynamics that during work, material is torn along with frictional force extruding extrudes in discharge end moving process is large not, and tearing effects is not good.
Summary of the invention
The object of the invention is to for deficiency of the prior art, dehydrating effect is good, helical axis is not easy to wear, service life of equipment long, the single-screw extruder tearing dehydration for express material in chemical-mechanical pulping of maintenance cost to provide a kind of extruding to tear.
In order to achieve the above object, the present invention solves the technical scheme that its technical problem takes and is:
Single-screw extruder, comprises frame, bearing chamber, seal bootr, and described bearing chamber is fixed on the left side of frame, and bearing chamber is movably installed with transition axis; Described seal bootr is fixed on the right of frame, is provided with charging aperture above the left side of seal bootr, and the right side of seal bootr is provided with discharging cover, and discharging cover is fixedly connected with discharging opening; In described seal bootr, the spiral axis of cone is also installed, one end of the spiral axis of cone is connected with transition axis spindle nose is bushing through the left side of seal bootr, spiral axis of cone other end exit side to be arranged in discharging cover and to overlap movable cantilever with discharging and be connected, when not having a material, the spiral axis of cone is unsettled, when there being material, discharging cover forms material ring and holds up the spiral axis of cone; The described spiral axis of cone is provided with multiple helical blade; Sieve plate is provided with between the described spiral axis of cone and seal bootr; The shape of the described spiral axis of cone is that diameter first diminishes the displacement taper becoming large afterwards from feed end to discharge end; The pitch of described helical blade becomes large gradually from feed end to discharge end, and the axis of cone diameter near first blade place of discharging cover is 396-398mm, and the axis of cone diameter near the 3rd blade place of discharging cover is 386-392mm; The shape of described discharging cover is cylindrical shape, and internal diameter is 400-406mm, and the spacing of discharging cover and the spiral axis of cone is 7-10mm.
Further illustrate as of the present invention, described transition axis is connected with drive unit, drives single-screw extruder work by drive unit.
Further illustrate as of the present invention, in described discharging cover, also spraying nozzle is installed, when design makes material uncolled after completing extruding and tearing dehydration like this, spray medicine can be carried out by spraying nozzle, to reach the effect that peak efficiency absorbs liquid, convenient and swift.
Further illustrate as of the present invention, the described main material of the spiral axis of cone is 41Cr1MoTiA, adopt this main material that the tensile strength of the spiral axis of cone can be made in 8-10% scope, to enhance the toughness of the spiral axis of cone at 650-700Mpa and percentage elongation in 900-1000Mpa, yield strength.
Further illustrate as of the present invention, the described spiral axis of cone, the surface overlaying of helical blade have wearing layer, thus improve the spiral axis of cone, wear-resisting, corrosion-resistant, the tension property the turned round degree of helical blade and hardness.
Further illustrate as of the present invention, described wearing layer is evanohm, adopts evanohm that the HRC of wearing layer can be made in 52-56 degree scope.
Further illustrate as of the present invention, the described transition axis shaft shoulder is provided with chamfering, and chamfer radius is 4-6mm.
Single-screw extruder of the present invention has following beneficial effect:
First to diminish the reducing pyramidal structure becoming large afterwards by the spiral axis of cone being arranged to diameter, helical blade is arranged to distance changing mechanism, that can strengthen material tears dynamics, and it is stepped that the internal diameter of discharging cover is arranged to classification expansion, the discharging speed of single-screw extruder can be reduced, what increase wood chip tears extrusion time, and make material more soft loose, it is good that dehydrating effect is torn in extruding.
Meanwhile, the main material selection 41Cr1MoTiA of the spiral axis of cone of the present invention, tensile strength is 900-1000Mpa, yield strength is 650-700Mpa and percentage elongation is 8-10%, enhances spiral axis of cone toughness, and wearing layer HRC is 52-56 degree; And the surface overlaying of the spiral axis of cone, helical blade has wearing layer, and (evanohm, its wilfulness, wearability, corrosion resistance, the tension property turned round degree and hardness are high, make helical axis not easy to wear, extend the service life of equipment, reduce maintenance cost.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the structural representation of single-screw extruder of the present invention.
In figure, 1-frame; 2-bearing chamber; 3-transition axis; 4-seal bootr; 5-charging aperture; 6-discharging cover; 7-discharging opening; 8-spiral axis of cone; 9-helical blade; 10-sieve plate; 11-spraying nozzle.
Detailed description of the invention
As shown in Figure 1, single-screw extruder of the present invention, comprises frame 1, bearing chamber 2, seal bootr 4, and described bearing chamber 2 is fixed on the left side of frame 1, and bearing chamber 2 is movably installed with transition axis 3; Described seal bootr 4 is fixed on the right of frame 1, is provided with charging aperture 5 above the left side of seal bootr 4, and the right side of seal bootr 4 is provided with discharging cover 6, and discharging cover 6 is fixedly connected with discharging opening 7; In described seal bootr 4, the spiral axis of cone 8 is also installed, one end of the spiral axis of cone 8 is connected with transition axis 3 spindle nose is bushing through the left side of seal bootr 4, the spiral axis of cone 8 other end exit side to be arranged in discharging cover 6 and to overlap 6 movable cantilevers with discharging and be connected, when not having a material, the spiral axis of cone 8 is unsettled, when there being material, discharging cover 6 forms material ring and holds up the spiral axis of cone 8; The described spiral axis of cone 8 is provided with multiple helical blade 9; Sieve plate 10 is provided with between the described spiral axis of cone 8 and seal bootr 4; The shape of the described spiral axis of cone 8 is that diameter first diminishes the displacement taper becoming large afterwards from feed end to discharge end; The pitch of described helical blade 9 becomes large gradually from feed end to discharge end, and the axis of cone diameter near first blade place of discharging cover 6 is 396-398mm, and the axis of cone diameter near the 3rd blade place of discharging cover 6 is 386-392mm; The shape of described discharging cover 6 is cylindrical shape, and internal diameter is 400-406mm, and discharging cover 6 is 7-10mm with the spacing of the spiral axis of cone 8.
First to diminish the reducing pyramidal structure becoming large afterwards by the spiral axis of cone 8 being arranged to diameter, helical blade 9 is arranged to distance changing mechanism, because the change of material volume forms compression ratio, what under the effect such as extruding force and frictional force, form different materials by control torque tears dynamics, and the internal diameter of discharging cover 6 is arranged to the diameter being greater than the spiral axis of cone 8 end, the discharging speed of single-screw extruder can be reduced, what increase wood chip tears extrusion time, make material more soft loose, it is good that dehydrating effect is torn in extruding, for chemical-mechanical pulping, be convenient to the refining energy consumption that next step absorbs chemical liquid better and reduces high-density paste mill, and the liquid forming effective high concentration absorbs bleaching.
Described drive unit is connected with transition axis 3, drives single-screw extruder work by transition axis 3 spindle nose nested structure.
After tearing to make express material, fully can absorb chemicals, in this discharging cover 6, spraying nozzle 11 is installed, spraying nozzle 11 is multiple and is evenly arranged on above discharging cover 6, on the inner surface of three, front and back, in order to be herbal sprinkling more fully, put in place, also spraying nozzle 11 can be installed again at the lower inner surface of discharging cover 6.
As a further improvement on the present invention, the described main material of the spiral axis of cone 8 is 41Cr1MoTiA, adopt this main material can make the tensile strength of the spiral axis of cone 8 in 900-1000Mpa, yield strength at 650-700Mpa and percentage elongation in 8-10% scope; There is wearing layer in the surface overlaying of the spiral axis of cone 8, helical blade 9 simultaneously, it can be evanohm, make the HRC of wearing layer in 52-56 degree scope, thus the toughness of the raising spiral axis of cone 8, helical blade 9, wearability, corrosion resistance, the tension property turned round and hardness, make helical axis not easy to wear, extend the service life of equipment, reduce maintenance cost.
As a further improvement on the present invention; described transition axis 3 shaft shoulder is provided with chamfering; chamfer radius is 4-6mm; this is because transition axis 3 is arranged in bearing chamber 2; the other end and connect and vibrate that the very large spiral axis of cone 8 is bushing to be connected; when vibrating very large, this bushing connection easily causes transition axis 3 to twist off; especially time the startup-shutdown spiral axis of cone 8 discharging opening 7 does not also form material plug; in order to head it off; by transition axis 3 shaft shoulder is designed to chamfering, transition axis 3 spindle nose can be avoided to be twisted off because of excessive by stress.
Its course of work is as follows:
The drive unit of frequency conversion drives transition axis 3 to rotate, and transition axis 3 drives the spiral axis of cone 8 again, helical blade 9 rotates, material enters from charging aperture 5, the helical blade 9 of the spiral axis of cone 8 rotates to be pushed material to discharging opening 7 through the spiral axis of cone 8 and sieve plate 10 from charging aperture 5, along with material is constantly pushed forward, become again large after the spiral axis of cone 8 diameter first diminishes, helical blade 9 pitch becomes large gradually, the space of material in seal bootr 4 is constantly diminished, material is pressed tighter and tighter, again due to the rubbing action of helical blade 9, material is extruded tear, dehydration, water is then discharged from the osculum sieve plate 10, after dehydration torn by material, formation Multiple level loosens, and strand is spongy to flow out from discharging opening 7, after material flows out, sprinkling chemicals can be carried out by spraying nozzle 11 pairs of materials, chemicals is absorbed more abundant, thus complete whole mechanical presses dehydration.
After tested, adopt single-screw extruder of the present invention to tear dehydration to the extruding of Eucalyptus sheet, water content is lower than 25%, and wood chip unit weight piles up unit weight 150 ~ 160kg/m by original over dry
3become over dry and pile up unit weight 70-90kg/m
3, after dehydration is torn in extruding, to form the good Multiple level strand that loosens spongy for wood chip, is convenient to absorb chemical liquid.
Claims (7)
1. a single-screw extruder, comprises frame (1), bearing chamber (2), seal bootr (4), and described bearing chamber (2) is fixed on the left side of frame (1), and bearing chamber (2) is movably installed with transition axis (3); Described seal bootr (4) is fixed on the right of frame (1), is provided with charging aperture (5) above the left side of seal bootr (4), and the right side of seal bootr (4) is provided with discharging cover (6), and discharging cover (6) is fixedly connected with discharging opening (7); In described seal bootr (4), the spiral axis of cone (8) is also installed, one end of the spiral axis of cone (8) is connected with transition axis (3) spindle nose is bushing through the left side of seal bootr (4), and it is interior and be connected with discharging cover (6) movable cantilever that the other end of the spiral axis of cone (8) is sleeved on discharging cover (6); The described spiral axis of cone (8) is provided with multiple helical blade (9); Sieve plate (10) is provided with between the described spiral axis of cone (8) and seal bootr (4); It is characterized in that: the shape of the described spiral axis of cone (8) is that diameter first diminishes the displacement taper becoming large afterwards from feed end to discharge end; The pitch of described helical blade (9) becomes large gradually from feed end to discharge end, and the axis of cone diameter near first blade place of discharging cover (6) is 396-398mm, and the axis of cone diameter near the 3rd blade place of discharging cover (6) is 386-392mm; The shape of described discharging cover (6) is cylindrical shape, and internal diameter is 400-406mm, and discharging cover (6) is 7-10mm with the spacing of the spiral axis of cone (8).
2. single-screw extruder according to claim 1, is characterized in that: described transition axis (3) is connected with drive unit.
3. single-screw extruder according to claim 1, is characterized in that: be also provided with spraying nozzle (11) in described discharging cover (6).
4. single-screw extruder according to claim 1, is characterized in that: the described spiral axis of cone (8) main material is 41Cr1MoTiA.
5. single-screw extruder according to claim 1, is characterized in that: the described spiral axis of cone (8), the surface overlaying of helical blade (9) have wearing layer.
6. single-screw extruder according to claim 5, is characterized in that: described wearing layer is evanohm.
7. single-screw extruder according to claim 1, is characterized in that: described transition axis (3) shaft shoulder is provided with chamfering, and chamfer radius is 4-6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510269465.1A CN104842577B (en) | 2015-05-25 | 2015-05-25 | single-screw extruder |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510269465.1A CN104842577B (en) | 2015-05-25 | 2015-05-25 | single-screw extruder |
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| CN104842577A CN104842577A (en) | 2015-08-19 |
| CN104842577B true CN104842577B (en) | 2016-04-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018197269A1 (en) * | 2017-04-25 | 2018-11-01 | Hamilton Stephen Windsor | Apparatus and method for carrying out supercritical water oxidation of a material |
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| CN106390555B (en) * | 2016-10-11 | 2018-12-11 | 鹤壁职业技术学院 | A kind of screw extrusion automatic dewatering unit |
| CN106671466B (en) * | 2017-02-04 | 2019-06-21 | 包头国士鼎盛投资有限公司 | Screw extruder for straw dehydration |
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| CN106927659A (en) * | 2017-04-13 | 2017-07-07 | 北京工商大学 | The small-sized quick desiccation charing all-in-one of sludge |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006247683A (en) * | 2005-03-09 | 2006-09-21 | Heisei Kiko Kk | Screw type dehydrator |
| CN203063154U (en) * | 2013-01-17 | 2013-07-17 | 新乡市众科机械有限公司 | Spiral dehydrating barrel for liquid material |
| CN203779900U (en) * | 2014-02-17 | 2014-08-20 | 北京世纪国瑞环境工程技术有限公司 | Household garbage extrusion device |
| CN204109408U (en) * | 2014-08-11 | 2015-01-21 | 安徽中盛食用油科技有限公司 | A kind of pressafiner |
| CN204712493U (en) * | 2015-05-25 | 2015-10-21 | 南宁糖业股份有限公司 | single-screw extruder |
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- 2015-05-25 CN CN201510269465.1A patent/CN104842577B/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018197269A1 (en) * | 2017-04-25 | 2018-11-01 | Hamilton Stephen Windsor | Apparatus and method for carrying out supercritical water oxidation of a material |
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