CN118253222B - Different-direction differential screw kneading device, continuous kneader and material manufacturing system - Google Patents
Different-direction differential screw kneading device, continuous kneader and material manufacturing system Download PDFInfo
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- CN118253222B CN118253222B CN202410689959.4A CN202410689959A CN118253222B CN 118253222 B CN118253222 B CN 118253222B CN 202410689959 A CN202410689959 A CN 202410689959A CN 118253222 B CN118253222 B CN 118253222B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
- B01F27/72—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices
- B01F27/721—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices with two or more helices in the same receptacle
- B01F27/723—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices with two or more helices in the same receptacle the helices intermeshing to knead the mixture
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/50—Mixing liquids with solids
- B01F23/53—Mixing liquids with solids using driven stirrers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
- B01F27/72—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices
- B01F27/721—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices with two or more helices in the same receptacle
- B01F27/722—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices with two or more helices in the same receptacle the helices closely surrounded by a casing
- B01F27/7221—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices with two or more helices in the same receptacle the helices closely surrounded by a casing the stirrers being composed of helices and paddles on the same shaft, e.g. helically arranged ovally shaped paddles
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention discloses an anisotropic differential screw kneading device, a continuous kneader and a material manufacturing system, wherein a screw mechanism comprises a central screw and a peripheral screw which are matched in an anisotropic differential way, and a center She Aomian is arranged on one side of a central blade of the central screw facing the peripheral blade along the rotation direction of the central screw; the peripheral blade of the peripheral screw rod is provided with a periphery She Tumian along the rotation direction of the peripheral blade and one side facing the central blade; center She Aomian is envelope fitted with perimeter She Tumian; the central She Aomian and the peripheral convex surfaces of the blades are provided with material kneading sections, a kneading gap e is arranged between the two material kneading sections, and the kneading gaps e are equal from the beginning of engagement to the end of engagement. When the material kneading sections of the central screw and the peripheral screw are enveloped to knead materials, the constant kneading gap e is maintained, the forward conveying of the materials is ensured, the materials are fully kneaded and mixed, and the mixing effect of the materials is improved.
Description
Technical Field
The invention relates to the technical field of material mixing and dispersing, in particular to an anisotropic differential screw kneading device, a continuous kneader and a material manufacturing system applied to material mixing and dispersing.
Background
Mixing, shearing, plasticizing and other mixing functions are often carried out on high-viscosity fluids in industries such as petroleum, chemical industry, rubber, plastics, pharmacy, food and the like, and an extruder and a kneader are important equipment for mixing, shearing and plasticizing the high-viscosity fluids.
The Chinese patent 202010216298.5 discloses a different-direction differential rotation extrusion device, wherein a screw mechanism is arranged in a machine barrel and comprises a first screw and a second screw, and the first screw and the second screw rotate in different directions at a fixed rotation speed ratio; the top diameter and the root diameter of the first screw are respectively meshed with the root diameter and the top diameter of the second screw all the time, at least one first middle circular arc structure is arranged between the root diameter and the top diameter of the first screw, a second middle circular arc structure which is tangential to the first middle circular arc structure all the time is arranged between the root diameter and the top diameter of the second screw, and the mutual opening of the screw grooves of the two screws is realized through the first middle circular arc structure of the first screw and the second middle circular arc structure of the second screw, so that the original closed C-shaped chamber positive displacement conveying unit is expanded into an 8-shaped chamber positive displacement conveying unit, and the mixing effect is improved. The screw mechanism of the different-direction differential extrusion device realizes the mixing and conveying of materials through the mutual engagement of the spiral blades of the first screw and the second screw, and the contact area of the mixing area between the spiral blades of the two screws is smaller, so that the mixing effect is poor; although the first screw and the second screw expand the original closed C-shaped chamber positive displacement conveying unit into an 8-shaped chamber positive displacement conveying unit through the first middle circular arc structure and the second middle circular arc structure tangent to the first screw and the second screw, the contact area of the mixing area is increased, but a screw groove axial closed structure exists on the screw mechanism, that is, the mixing area of the positive displacement conveying unit between the first screw and the second screw is not completely penetrated along the axial direction, but is divided into a plurality of mixing subareas by the screw groove axial closed structure, and materials in the mixing subareas still realize mixing and conveying through the engagement of the helical blades, so that the contact area of the mixing subareas is still relatively small, and the mixing effect of the materials is still not ideal.
Disclosure of Invention
The application provides a reasonable-structure different-direction differential screw kneading device, a continuous kneader and a material manufacturing system, aiming at the defects of the existing different-direction differential rotary extrusion device, wherein a plurality of conveying units and kneading units are arranged on a screw assembly, so that the contact area of a mixing area is increased, and the material mixing effect is improved.
The technical scheme adopted by the invention is as follows:
The utility model provides a different directional differential screw kneading device, includes screw rod mechanism, and screw rod mechanism includes different directional differential cooperation's central screw rod and peripheral screw rod, and the central radial cross section of central screw rod includes a plurality of central paddles, and the peripheral radial cross section of peripheral screw rod includes a plurality of peripheral paddles, and central paddle is along its direction of rotation, sets up center She Aomian towards one side of peripheral paddle; the peripheral paddle is provided with a periphery She Tumian along the rotation direction thereof and facing to one side of the central paddle; center She Aomian is envelope fitted with perimeter She Tumian; the central She Aomian and the peripheral convex surfaces of the blades are provided with material kneading sections, a kneading gap e is formed between the material kneading sections, and the material kneading sections are equal from the beginning of engagement to the end of engagement; the center She Aomian is provided with a first concave surface section and a second concave surface section, the periphery She Tumian is provided with a convex surface section and a third concave surface section, and the first concave surface section and the convex surface section are material kneading sections; the ratio of the arc length L5 of the first concave surface section to the arc length L6 of the convex surface section is: l5/l6=n1/n 2, n1 being the rotational speed of the central screw and n2 being the rotational speed of the peripheral screw; the center blade comprises a center blade top diameter and a center blade root diameter, and the peripheral blade comprises a peripheral blade top diameter and a peripheral blade root diameter; the diameter D1 of the center blade top diameter is equal to the diameter D2 of the peripheral blade top diameter, and the diameter D1 of the center blade root diameter is equal to the diameter D2 of the peripheral blade root diameter; the meshing clearance c is arranged between the central blade root diameter of the central blade and the peripheral blade top diameter of the peripheral blade, c=b- (d1+d2)/2=b- (d1+d2)/2, and b is the distance between the central screw rod central point O1 and the peripheral screw rod central point O2.
As a further improvement of the above technical scheme:
The kneading gap e is 0.1mm to 10mm.
The engagement clearance c is 0.5mm to 20mm.
The number of the center paddles is greater than or equal to the number of the peripheral paddles, and the number of the center paddles is an integer multiple of the number of the peripheral paddles.
A plurality of center paddles extend outwards from the center screw rod along the rotation direction of the center screw rod and face the peripheral screw rod to rotate out; the peripheral paddles extend outwards from the peripheral screw rod along the rotation direction of the peripheral screw rod to face the central screw rod, and the rotation direction of the peripheral paddles is opposite to that of the central paddles.
The screw mechanism is provided with a plurality of conveying areas and a plurality of kneading areas along the axial direction of the screw; the conveying area and the kneading area are arranged at intervals; the central screw and the peripheral screw are provided with a plurality of conveying units corresponding to a plurality of conveying areas, and a plurality of kneading units corresponding to a plurality of kneading areas; the conveying units of the central screw and the peripheral screw are engaged by the helical blades, and the kneading units are engaged by the kneading blades.
The conveying units of the central screw and the peripheral screw are formed by spirally twisting radial cross sections containing a plurality of paddles along the axial direction, and the conveying units form a plurality of spiral blades on the screw.
The kneading unit of the central screw and the peripheral screw is formed by a plurality of kneading blades with the cross section of radial cross sections comprising a plurality of paddles, which are axially overlapped and sequentially deflected by a certain angle along the circumferential direction; the direction from the feed end to the discharge end, the angular deflection direction of the kneading blade is opposite to the rotation direction of the screw thereof.
The ratio of the deflection angle α of the center kneading blade of the center kneading unit to the deflection angle β of the peripheral kneading blade of the peripheral kneading unit is: α/β=n1/n 2.
The conveying areas comprise a feeding conveying area, an intermediate conveying area and a discharging conveying area, and a plurality of intermediate conveying areas and a plurality of kneading areas are arranged at intervals one by one; the central screw and the peripheral screw are provided with a first conveying unit, a second conveying unit and a third conveying unit, the spiral direction of the first conveying unit is the same as that of the second conveying unit, and the spiral direction of the third conveying unit is opposite to that of the first conveying unit and the second conveying unit; the first output unit is arranged in the feeding conveying area, the second conveying unit is arranged in the middle conveying area, and the third conveying unit is arranged in the middle conveying area and/or the discharging conveying area.
The axial length L1 of the first conveying unit is greater than the axial length L2 of the second conveying unit, l1= (2-50) L2; the axial length L2 of the second conveying unit is equal to the axial length L4 of the third conveying unit; the axial length L3 of the kneading unit is equal to or greater than the axial length L2 of the second conveying unit, l3= (1.0 to 2.5) L2.
At least one peripheral screw is meshed with the periphery of the central screw.
A continuous kneader comprises the anisotropic differential screw kneading device, a screw mechanism is arranged in a mixing cylinder, and one end of the screw mechanism is connected with a driving device; the mixing cylinder is provided with at least one powder inlet, a plurality of liquid inlets and a plurality of discharge holes; the powder inlet is arranged at one side of a feeding and conveying area of the screw mechanism, and the upper discharge port and the lower discharge port are arranged at one side of a discharging and conveying area of the screw mechanism; the mixing cylinder and the driving device are arranged on the frame.
A material making system comprises a continuous kneader; the device also comprises a powder batching system, a liquid batching system and a plurality of slurry dispersing systems, wherein the powder batching system is connected with a powder inlet of the kneader, the liquid batching system is connected with a liquid inlet of the kneader, and a discharge hole of the kneader is connected with the slurry dispersing systems.
As a further improvement of the above technical scheme:
The powder batching system comprises a plurality of powder bins and a buffer bin, wherein the powder bins are connected with the buffer bin through pipelines, and the buffer bin is connected with a powder inlet of the kneader through a pipeline; the liquid batching system comprises a plurality of liquid tanks, a part of the liquid tanks are connected with a liquid inlet of the kneader through pipelines, and the other part of the liquid tanks are connected to the slurry dispersing system through pipelines; the slurry dispersing system comprises a slurry tank, and a stirrer is arranged in the slurry tank.
The beneficial effects of the invention are as follows:
when the material kneading sections of the central screw and the peripheral screw are enveloped to knead materials, the constant kneading gap e is maintained, the forward conveying of the materials is ensured, the materials are fully kneaded and mixed, and the mixing effect of the materials is improved.
The meshing gap c is arranged between the top diameter/root diameter of the central screw rod and the root diameter/top diameter of the peripheral screw rod, so that the mixing area between the central screw rod and the peripheral screw rod is fully communicated along the axial direction, the contact area of the mixing area is greatly increased, the mixing effect of materials is greatly improved, the mixing capability of the materials is improved, the overall length of the screw rod can be greatly shortened under the condition of the same mixing requirement, the structure of a screw rod mechanism is simplified, and the abrasion of the screw rod is reduced.
The screw mechanism is provided with the conveying units and the kneading units at intervals along the axial direction, and in the conveying area, the central screw and the peripheral screws are used for continuously, frictionally, dispersedly and mixing materials and forward conveying the materials through the engagement of the helical blades of the conveying units, so that the positive displacement conveying capacity is improved, and the forward conveying efficiency of the materials is ensured. In the kneading area, the central screw and the peripheral screw continuously knead the materials through the meshing of the kneading blades, so that the materials are more fully mixed, the mixing effect of the materials is improved, and the mixing capability is improved. In the process of mixing and conveying, materials are subjected to dispersion mixing and kneading mixing continuously, so that the material conveying efficiency is ensured, the contact area of material mixing is increased, and the material mixing effect is improved.
The axial length of the first conveying unit is set longer, so that the positive displacement conveying capacity of feeding is improved, and forward conveying of materials is facilitated. The axial length of the kneading unit is larger than or equal to that of the second conveying unit, the kneading path is longer, the material stays in the kneading unit for a longer time, and the kneading effect is better.
Drawings
Fig. 1 is a schematic perspective view of a first embodiment of a screw mechanism according to the present invention.
Fig. 2 is a schematic top view of a first embodiment of the screw mechanism of the present invention.
Fig. 3 is a schematic view of a radial cross-section of a first embodiment of the screw mechanism of the present invention.
Fig. 4 is a schematic structural view of the central conveying unit of the central screw.
Fig. 5 is a schematic view of the structure of the central kneading unit of the central screw.
Fig. 6 is a left side view of the central kneading unit of the central screw.
Fig. 7 is a schematic structural view of the peripheral conveying unit of the peripheral screw.
Fig. 8 is a schematic structural view of a peripheral kneading unit of the peripheral screw.
Fig. 9 is a left side view of the peripheral kneading unit of the peripheral screw.
Fig. 10 is a schematic view of a radial cross section of a second embodiment of the screw mechanism of the present invention.
Fig. 11 is a schematic view of a radial cross-section of a third embodiment of the screw mechanism of the present invention.
Fig. 12 is a schematic view of a radial cross-section of a fourth embodiment of the screw mechanism of the present invention.
Fig. 13 is a front view of the structure of the kneader.
FIG. 14 is a schematic top view of the kneader.
Fig. 15 is a schematic structural diagram of a material making system.
In the figure: 100. a screw mechanism; 101. a feed delivery zone; 102. an intermediate conveying zone; 103. a kneading zone; 104. a discharge conveying area;
1. a central screw; 10. a central radial cross section; 11. a center conveying unit; 111. a central first conveying unit; 112. a central second conveying unit; 113. a central third conveying unit; 12. a center kneading unit; 13. a center paddle; 131. the top diameter of the central leaf; 132. a center blade root diameter; 133. a center She Aomian; 1331. a first concave section; 1332. a second concave section; 14. a central helical blade; 15. a center kneading blade;
2. A peripheral screw; 20. a peripheral radial cross section; 21. a peripheral conveying unit; 211. a peripheral first conveying unit; 212. a peripheral second conveying unit; 213. a peripheral third conveying unit; 22. a peripheral kneading unit; 23. peripheral paddles; 231. the diameter of the top of the peripheral leaf; 232. peripheral root diameter; 233. a perimeter She Tumian; 2331. a convex section; 2332. a third concave section; 24. peripheral helical blades; 25. peripheral kneading blades;
200. A kneader; 201. a frame; 202. a mixing cylinder; 203. a driving device; 204. a powder inlet; 205. a first liquid inlet; 206. a second liquid inlet; 207. an upper discharge port; 208. a lower discharge port;
300. A powder batching system; 301. a powder bin; 302. a buffer bin;
400. A liquid dosing system; 401. a liquid tank;
500. A slurry dispersing system; 501. a slurry tank; 502. a stirrer.
Detailed Description
The following describes specific embodiments of the present invention with reference to the drawings.
First embodiment of screw mechanism 100:
As shown in fig. 1 and 2, the screw mechanism 100 according to the present invention includes a central screw 1 and a peripheral screw 2 that are differentially engaged in opposite directions, and the screw directions of the central screw 1 and the peripheral screw 2 are opposite; the screw mechanism 100 is provided with a feeding conveying area 101, a plurality of intermediate conveying areas 102, a plurality of kneading areas 103 and a discharging conveying area 104 along the screw axial direction, wherein the plurality of intermediate conveying areas 102 and the plurality of kneading areas 103 are arranged at intervals one by one. The central screw 1 is provided with a plurality of central conveying units 11 and a plurality of central kneading units 12 corresponding to each region, and the peripheral screw 2 is also provided with a plurality of peripheral conveying units 21 and a plurality of peripheral kneading units 22 corresponding to each region; the central conveying unit 11 and the peripheral conveying units 21 are meshed with each other and arranged in the conveying area, and the powder and the liquid are continuously dispersed and mixed and conveyed forwards; the central kneading unit 12 cooperates with the peripheral kneading units 22 to continuously knead and mix the powder with the liquid and convey it forward.
The central conveying unit 11 of the central screw 1 comprises a central first conveying unit 111, a plurality of central second conveying units 112 and a central third conveying unit 113, wherein the central first conveying unit 111 is arranged in the feeding conveying area 101, the central second conveying unit 112 is arranged in the middle conveying area 102, the central third conveying unit 113 is arranged in the discharging conveying area 104, and the central kneading unit 12 is arranged in the kneading area 103. The peripheral conveying units 21 of the peripheral screws 2 include a peripheral first conveying unit 211, a plurality of peripheral second conveying units 212, and a peripheral third conveying unit 213, the peripheral first conveying unit 211 being provided in the feed conveying section 101, the peripheral second conveying unit 212 being provided in the intermediate conveying section 102, the peripheral third conveying unit 213 being provided in the discharge conveying section 104, and the peripheral kneading unit 22 being provided in the kneading section 103. The screw mechanism 100 is provided with a plurality of conveying units and kneading units along the axial direction at intervals on the screw, materials are continuously and alternately subjected to dispersive mixing and kneading mixing in the mixing and conveying process, the material conveying efficiency is ensured, the contact area of material mixing is increased, and the material mixing effect is improved.
As shown in fig. 2, the spiral direction of the first conveying unit (located in the feeding conveying area 101) and the spiral direction of the second conveying unit (located in the middle conveying area 102) of the central screw 1/the peripheral screw 2 are the same, the spiral direction of the third conveying unit (located in the discharging conveying area 104) is opposite to the spiral directions of the first conveying unit and the second conveying unit, the discharging conveying area 104 of the screw is provided with the third conveying unit with opposite spiral directions, and after the materials enter the third conveying unit, the materials turn, so that the sealing pressure of the discharging end part is reduced, and the sealing life is prolonged. In other embodiments, a third conveying unit with opposite spiral directions may be disposed in the middle conveying area 102, so that the residence time of the materials in the conveying area may be prolonged, the mixing time may be prolonged, and the mixing effect of the materials may be improved. The axial length L1 of the first conveying unit is greater than the axial length L2 of the second conveying unit, l1= (2-50) L2, and the axial length of the first conveying unit in the feeding conveying area 101 is set longer, which is beneficial to improving the positive displacement conveying capability of feeding and beneficial to forward conveying of materials. The axial length L2 of the second conveying unit is equal to the axial length L4 of the third conveying unit. The axial length L3 of the kneading unit is larger than or equal to the axial length L2 of the second conveying unit, L3= (1.0-2.5) L2, the kneading path is longer, the materials stay in the kneading unit for a longer time, and the kneading effect is better.
The rotating speed n1 of the central screw rod 1 is smaller than or equal to the rotating speed n2 of the peripheral screw rod 2, n2/n1 is larger than or equal to 1, and the rotating speed n2 is an integral multiple of the rotating speed n1, so that the processing and manufacturing of the screw rod are facilitated. The ratio of the pitch S1 of the central screw 1 to the pitch S2 of the peripheral screw 2 is: s1/s2=n1/n 2.
As shown in fig. 3, the central radial cross section 10 of the central screw 1 includes a plurality of central paddles 13, the peripheral radial cross section 20 of the peripheral screw 2 includes a plurality of peripheral paddles 23, the number of the central paddles 13 may be equal to the number of the peripheral paddles 23, and the number of the central paddles 13 may be an integer multiple of the number of the peripheral paddles 23, in this embodiment, four central paddles 13 and two peripheral paddles 23. The center blade 13 includes a center tip diameter 131 and a center root diameter 132, and the peripheral blade 23 includes a peripheral tip diameter 231 and a peripheral root diameter 232; the diameter D1 of the center tip diameter 131 is equal to the diameter D2 of the peripheral tip diameter 231 and the diameter D1 of the center root diameter 132 is equal to the diameter D2 of the peripheral root diameter 232; the distance b between the center point O1 of the center screw 1 and the center point O2 of the peripheral screw 2 is greater than (d1+d2)/2 or greater than (d1+d2)/2, that is, there is an engagement gap c between the center blade root diameter 132 of the center blade 13 and the peripheral blade tip diameter 231 of the peripheral blade 23, there is also an engagement gap c between the center blade tip diameter 131 of the center blade 13 and the peripheral blade root diameter 232 of the peripheral blade 23, c=b- (d1+d2)/2=b- (d1+d2)/2, and the engagement gap c is 0.5mm to 20mm. The meshing gap c is arranged between the top diameter/root diameter of the central screw 1 and the root diameter/top diameter of the peripheral screw 2, so that the mixing area between the central screw 1 and the peripheral screw 2 is fully penetrated along the axial direction, the contact area of the mixing area is greatly increased, the mixing effect of materials is greatly improved, the mixing capability of the materials is improved, the overall length of the screw can be greatly shortened under the condition of the same mixing requirement, the structure of the screw mechanism 100 is simplified, and the abrasion of the screw is reduced.
A plurality of center paddles 13 of the center screw 1 are formed extending outward from the screw in the direction of rotation thereof toward the peripheral screw 2. The peripheral screw 2 is formed by extending and rotating out from the screw in the rotation direction thereof toward the central screw 1, and the rotation direction of the peripheral blade 23 is opposite to the rotation direction of the central blade 13. The center blade 13 is provided with a center She Aomian on a side facing the peripheral blade 23 in the rotation direction thereof, and the center She Aomian includes a first concave section 1331 on the outside and a second concave section 1332 on the inside, and with reference to fig. 3, the ab curve section is the first concave section 1331 and the bc curve section is the second concave section 1332. The peripheral blade 23 is provided with a peripheral edge She Tumian, 233 along its rotation direction, on the side facing the central blade 13, the peripheral blade convex surface 233 comprising an outer convex surface section 2331 and an inner third concave surface section 2332, the DE curve section being the convex surface section 2331 and the ef curve section being the third concave surface section 2332, with reference to figure three. The first concave section 1331 of the center blade 13 and the convex section 2331 of the peripheral blade 23 are used as material kneading sections of the two, and are matched with each other to knead materials; the ratio of the arc length L5 of the first concave segment 1331 to the arc length L6 of the convex segment 2331 is: l5/l6=n1/n 2; the first concave section 1331 and the convex section 2331 are provided with a space therebetween to form a kneading gap e, the kneading gap e is 0.1mm-10mm, the first concave section 1331 and the convex section 2331 are equal from the start of engagement (the two enter envelope fit) to the end of engagement (the two leave envelope fit), namely, when the first concave section 1331 and the convex section 2331 are enveloped to knead materials, the constant kneading gap e is kept, the forward conveying of the materials is ensured, meanwhile, the materials are fully kneaded and mixed, and the mixing effect of the materials is improved.
As shown in fig. 4, the central conveying unit 11 of the central screw 1 is formed by axially helically twisting a central radial cross section 10 at a pitch S1, and a plurality of central helical blades 14 are formed on the central screw 1 in correspondence with a plurality of central blades 13; the direction from the feed end to the discharge end, the direction of the spiral twist of the central first conveying unit 111 and the central second conveying unit 112 is opposite to the direction of rotation of the central screw 1, and the direction of the spiral twist of the central third conveying unit 113 is the same as the direction of rotation of the central screw 1. As shown in fig. 5 and 6, the central kneading units 12 of the central screw 1 are formed by a plurality of central kneading blades 15 having a cross-sectional shape of a central radial cross section 10, which are arranged in a stacked manner in the axial direction and are sequentially deflected in the circumferential direction by a certain angle α from the feed end to the discharge end direction, the included angles (central blade deflection angles α) between the centerlines of adjacent two central kneading blades 15 are equal, and the angular deflection direction of the central kneading blades 15 is opposite to the rotation direction of the central screw 1 from the feed end to the discharge end direction.
As shown in fig. 7, the peripheral conveying unit 21 of the peripheral screw 2 is formed by axially helically twisting the peripheral radial cross section 20 at a pitch S2, and a plurality of peripheral helical blades 24 are formed on the peripheral screw 2 in correspondence with the plurality of peripheral paddles 23; the direction from the feed end to the discharge end is the spiral torsion direction of the peripheral first conveying unit 211 and the peripheral second conveying unit 212 opposite to the rotation direction of the peripheral screw 2, and the spiral torsion direction of the peripheral third conveying unit 213 is the same as the rotation direction of the peripheral screw 2. As shown in fig. 8 and 9, the peripheral kneading units 22 of the peripheral screw 2 are formed by a plurality of peripheral kneading blades 25 having a cross-sectional shape of a peripheral radial cross section 20, which are arranged in a stacked manner in the axial direction and are sequentially deflected by a certain angle β in the circumferential direction from the feed end to the discharge end direction, that is, the included angle (peripheral blade deflection angle β) between the centerlines of adjacent two peripheral kneading blades 25 is equal, and the angular deflection direction of the peripheral kneading blades 25 is opposite to the rotation direction of the peripheral screw 2 from the feed end to the discharge end direction. The ratio of the deflection angle α of the center kneading blade 15 of the center kneading unit 12 to the deflection angle β of the peripheral kneading blade 25 of the peripheral kneading unit 22 is: α/β=n1/n 2.
As shown in fig. 1 and 2, in the conveying areas (a feeding conveying area 101, a middle conveying area 102 and a discharging conveying area 104), the central screw 1 and the peripheral screw 2 are meshed through the spiral blades of the conveying units to continuously, frictionally, dispersedly and mixed and forward feed the materials, so that the positive displacement conveying capacity is improved, and the forward conveying efficiency of the materials is ensured. In the kneading zone 103, the central screw 1 and the peripheral screw 2 continuously knead the materials through the meshing of the kneading blades, so that the materials are more fully mixed, the mixing effect of the materials is improved, and the mixing capability is improved.
Second embodiment of screw mechanism 100:
As shown in fig. 10, unlike the first embodiment, the screw mechanism 100 of the present embodiment includes one center screw 1 and two peripheral screws 2 that are differentially engaged in opposite directions, three screws being arranged in a row, and the two peripheral screws 2 being located on the left and right sides of the center screw 1. The three-screw mechanism 100 provides better mixing and better throughput and efficiency.
Third embodiment of screw mechanism 100:
As shown in fig. 11, unlike the second embodiment, the screw mechanism 100 of the present embodiment includes one central screw 1 and four peripheral screws 2 which are differentially engaged in opposite directions, the five screws being arranged in a cross, the four peripheral screws 2 being located on the left and right and upper and lower sides of the central screw 1. The multi-screw mechanism 100 further improves mixing efficiency, throughput, and efficiency.
Fourth embodiment of screw mechanism 100:
As shown in fig. 12, unlike the first embodiment, the number of center blades 13 of the center screw 1 of the present embodiment is equal to the number of peripheral blades 23 of the peripheral screw 2, both of which are two. The central screw 1 and the peripheral screw 2 are provided with the same number of paddles, so that the structure is simpler and the assembly is more convenient.
Examples of kneader 200:
As shown in fig. 13 and 14, a mixing cylinder 202 and a driving device 203 are provided on a frame 201 of the kneader 200, the screw mechanism 100 is provided in the mixing cylinder 202, and one end of the screw mechanism 100 is connected to the driving device 203. The mixing cylinder 202 is provided with at least one powder inlet 204, a plurality of liquid inlets and a plurality of discharge outlets, in this embodiment, the mixing cylinder 202 is provided with a first liquid inlet 205, a second liquid inlet 206, an upper discharge outlet 207 and a lower discharge outlet 208. The powder inlet 204 is provided on the side of the feed conveying section 101 of the screw mechanism 100, and the upper discharge port 207 and the lower discharge port 208 are provided on the side of the discharge conveying section 104 of the screw mechanism 100.
Embodiments of the material making system:
As shown in fig. 15, the material making system includes the kneader 200, the powder batching system 300, the liquid batching system 400, and the slurry dispersing systems 500. The powder batching system 300 comprises a powder bin 301 and a buffer bin 302, wherein the powder bin 301 is connected with the buffer bin 302 through a pipeline, and the buffer bin 302 is connected with the powder inlet 204 of the kneader 200 through a pipeline. The liquid compounding system 400 includes a plurality of liquid tanks 401, and a part of the liquid tanks 401 are connected to the liquid inlet of the kneader 200 through pipes. The slurry dispersing system 500 comprises a slurry tank 501, wherein a stirrer 502 is arranged in the slurry tank 501, a discharge port of the kneader 200 is connected with the slurry tank 501, and a part of the liquid tank 401 of the liquid batching system 400 is also connected to the slurry tank 501 through a pipeline. In actual use, the powder of the powder batching system 300 is added into the kneader 200 through the powder inlet 204, the liquid of the liquid batching system 400 is added into the kneader 200 through the liquid inlet, the powder and the liquid are fully mixed in the kneader 200 and then output to the slurry dispersing system 500 from the discharge port, and the powder and the liquid are further mixed and dispersed in the slurry dispersing system 500.
The above description is illustrative of the invention and is not intended to be limiting, and the invention may be modified in any form without departing from the spirit of the invention.
Claims (15)
1. The utility model provides a device is kneaded to different direction differential screw rod, includes screw mechanism (100), and screw mechanism (100) include different direction differential complex center screw rod (1) and peripheral screw rod (2), its characterized in that: the central radial cross section (10) of the central screw (1) comprises a plurality of central paddles (13), the peripheral radial cross section (20) of the peripheral screw (2) comprises a plurality of peripheral paddles (23), and the central paddles (13) are provided with a center She Aomian (133) along the rotating direction of the central paddles and at one side facing the peripheral paddles (23); the peripheral blade (23) is provided with a periphery She Tumian (233) along the rotation direction thereof on the side facing the center blade (13); center She Aomian (133) is envelope fitted with perimeter She Tumian (233); the center She Aomian (133) and the periphery She Tumian (233) are provided with material kneading blocks, a kneading gap e is formed between the two material kneading blocks, and the kneading gaps e are equal from the beginning of engagement to the end of engagement; the center She Aomian (133) is provided with a first concave surface section (1331) and a second concave surface section (1332), the periphery She Tumian (233) is provided with a convex surface section (2331) and a third concave surface section (2332), and the first concave surface section (1331) and the convex surface section (2331) are material kneading sections; the ratio of the arc length L5 of the first concave section (1331) to the arc length L6 of the convex section (2331) is: l5/l6=n1/n 2, n1 being the rotational speed of the central screw (1) and n2 being the rotational speed of the peripheral screw (2); the center blade (13) comprises a center blade top diameter (131) and a center blade root diameter (132), and the peripheral blade (23) comprises a peripheral blade top diameter (231) and a peripheral blade root diameter (232); the diameter D1 of the center blade tip diameter (131) is equal to the diameter D2 of the peripheral blade tip diameter (231), and the diameter D1 of the center blade root diameter (132) is equal to the diameter D2 of the peripheral blade root diameter (232); the center blade root diameter (132) of the center blade (13) and the peripheral blade tip diameter (231) of the peripheral blade (23) have an engagement clearance c, c=b- (d1+d2)/2=b- (d1+d2)/2, and b is the distance between the center point O1 of the center screw (1) and the center point O2 of the peripheral screw (2).
2. The differential screw kneading device according to claim 1, wherein: the kneading gap e is 0.1mm to 10mm.
3. The differential screw kneading device according to claim 1, wherein: the engagement clearance c is 0.5mm to 20mm.
4. The differential screw kneading device according to claim 1, wherein: the number of the center paddles (13) is equal to or greater than the number of the peripheral paddles (23), and the number of the center paddles (13) is an integer multiple of the number of the peripheral paddles (23).
5. The differential screw kneading device according to claim 1, wherein: a plurality of center paddles (13) extend outwards from the center screw (1) along the rotation direction of the center screw and face the peripheral screw (2); the peripheral paddles (23) are formed by extending and rotating outwards from the peripheral screw (2) along the rotating direction of the peripheral screw towards the central screw (1), and the rotating direction of the peripheral paddles (23) is opposite to that of the central paddles (13).
6. The differential screw kneading device according to claim 1, wherein: the screw mechanism (100) is provided with a plurality of conveying areas and a plurality of kneading areas (103) along the axial direction of the screw; the conveying area and the kneading area (103) are arranged at intervals; the central screw (1) and the peripheral screw (2) are provided with a plurality of conveying units corresponding to a plurality of conveying areas, and a plurality of kneading units corresponding to a plurality of kneading areas (103); the central screw (1) is engaged with the conveying units of the peripheral screws (2) by helical blades, and the kneading units are engaged by kneading blades.
7. The differential screw kneading device according to claim 6, wherein: the conveying units of the central screw (1) and the peripheral screw (2) are formed by spirally twisting radial cross sections comprising a plurality of paddles along the axial direction, and the conveying units form a plurality of spiral paddles on the screws.
8. The differential screw kneading device according to claim 6, wherein: the kneading units of the central screw (1) and the peripheral screw (2) are formed by a plurality of kneading blades with cross sections in radial cross sections comprising a plurality of paddles, which are axially overlapped and sequentially deflected by a certain angle along the circumferential direction; the direction from the feed end to the discharge end, the angular deflection direction of the kneading blade is opposite to the rotation direction of the screw thereof.
9. The differential screw kneading device according to claim 8, wherein: the ratio of the deflection angle alpha of the center kneading blade (15) of the center kneading unit (12) to the deflection angle beta of the peripheral kneading blade (25) of the peripheral kneading unit (22) is: α/β=n1/n 2.
10. The differential screw kneading device according to claim 6, wherein: the conveying areas comprise a feeding conveying area (101), an intermediate conveying area (102) and a discharging conveying area (104), and a plurality of intermediate conveying areas (102) and a plurality of kneading areas (103) are arranged at intervals one by one; the central screw (1) and the peripheral screw (2) are provided with a first conveying unit, a second conveying unit and a third conveying unit, the spiral direction of the first conveying unit is the same as that of the second conveying unit, and the spiral direction of the third conveying unit is opposite to that of the first conveying unit and the second conveying unit; the first output unit is arranged in the feeding conveying area (101), the second conveying unit is arranged in the middle conveying area (102), and the third conveying unit is arranged in the middle conveying area (102) and/or the discharging conveying area (104).
11. The differential screw kneading device according to claim 10, wherein: the axial length L1 of the first conveying unit is greater than the axial length L2 of the second conveying unit, l1= (2-50) L2; the axial length L2 of the second conveying unit is equal to the axial length L4 of the third conveying unit; the axial length L3 of the kneading unit is equal to or greater than the axial length L2 of the second conveying unit, l3= (1.0 to 2.5) L2.
12. The differential screw kneading device according to claim 1, wherein: at least one peripheral screw (2) is meshed with the periphery of the central screw (1).
13. A continuous kneader, characterized in that: comprises the anisotropic differential screw kneading device of any of claims 1-12, wherein the screw mechanism (100) is arranged in the mixing cylinder (202), and one end of the screw mechanism (100) is connected with the driving device (203); at least one powder inlet (204), a plurality of liquid inlets and a plurality of discharge holes are arranged on the mixing cylinder (202); the powder inlet (204) is arranged at one side of a feeding and conveying area (101) of the screw mechanism (100), and the upper discharge port (207) and the lower discharge port (208) are arranged at one side of a discharging and conveying area (104) of the screw mechanism (100); the mixing cylinder (202) and the driving device (203) are arranged on the frame (201).
14. A material making system, characterized in that: comprising the continuous kneader of claim 13; the mixing device further comprises a powder batching system (300), a liquid batching system (400) and a plurality of slurry dispersing systems (500), wherein the powder batching system (300) is connected with a powder inlet (204) of the kneader (200), the liquid batching system (400) is connected with a liquid inlet of the kneader (200), and a discharge port of the kneader (200) is connected with the slurry dispersing systems (500).
15. The material making system according to claim 14, wherein: the powder batching system (300) comprises a plurality of powder bins (301) and a buffer bin (302), wherein the powder bins (301) are connected with the buffer bin (302) through pipelines, and the buffer bin (302) is connected with a powder inlet (204) of the kneader (200) through pipelines; the liquid batching system (400) comprises a plurality of liquid tanks (401), wherein part of the liquid tanks (401) are connected with a liquid inlet of the kneader (200) through pipelines, and the other part of the liquid tanks (401) are connected with the slurry dispersing system (500) through pipelines; the slurry dispersing system (500) comprises a slurry tank (501), and a stirrer (502) is arranged in the slurry tank (501).
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| CN202410689959.4A CN118253222B (en) | 2024-05-30 | 2024-05-30 | Different-direction differential screw kneading device, continuous kneader and material manufacturing system |
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| CN202410689959.4A CN118253222B (en) | 2024-05-30 | 2024-05-30 | Different-direction differential screw kneading device, continuous kneader and material manufacturing system |
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| CN118253222B true CN118253222B (en) | 2024-10-11 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102058011A (en) * | 2010-12-03 | 2011-05-18 | 兰州理工大学 | Screw structure of double-screw extruder |
| CN215463957U (en) * | 2021-03-16 | 2022-01-11 | 欣旺达电动汽车电池有限公司 | Kneading device and battery paste manufacturing equipment |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205164550U (en) * | 2015-12-07 | 2016-04-20 | 周凤举 | Circular arc helicoid blade differential kneading machine |
| CN213791055U (en) * | 2020-11-19 | 2021-07-27 | 上海科锐驰化工装备技术有限公司 | Double-shaft continuous kneading machine adopting kneading paddles |
| CN215463958U (en) * | 2021-03-17 | 2022-01-11 | 欣旺达电动汽车电池有限公司 | Kneading device and manufacturing equipment of battery slurry |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102058011A (en) * | 2010-12-03 | 2011-05-18 | 兰州理工大学 | Screw structure of double-screw extruder |
| CN215463957U (en) * | 2021-03-16 | 2022-01-11 | 欣旺达电动汽车电池有限公司 | Kneading device and battery paste manufacturing equipment |
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