CN220758776U - Double-planetary screw mixer with two ends supported - Google Patents

Abstract

The utility model discloses a double-planetary screw mixer with two ends supported, which relates to the technical field of slurry preparation and comprises: a driving device comprising an input shaft system; the first end of the sun shaft system is connected with the input shaft system through gear engagement; the planetary shaft system comprises two planetary shafts, and the planetary shafts are connected with the second end of the sun shaft system through gear meshing; a barrel; the mixing device comprises two screws which are arranged in the machine barrel in parallel; the passive connecting seat is arranged at the first end of the machine barrel, and the first ends of the two screws penetrate through the passive connecting seat and are coaxially connected with the planetary shaft; the solar shafting is connected with the double-planetary transmission case through keys; and the second ends of the two screws are connected with the passive transmission device. The device can solve the problems of intermittent production and variability among different batches of the existing double-planetary mixer, and improve the problems of screw deflection deformation and easy contact abrasion with the cylinder wall caused by the large length-diameter ratio of the double-screw extruder.

Description

Double-planetary screw mixer with two ends supported

Technical Field

The utility model relates to the technical field of slurry preparation, in particular to a double-planetary screw mixer with two ends supported.

Background

In the related art, in the field of lithium battery slurry preparation, a double-planetary stirrer is mostly adopted to realize powder and liquid mixing, dispersing and homogenizing so as to obtain slurry with relatively stable properties and moderate viscosity. However, the preparation of lithium battery slurry by the double-planetary mixer belongs to an intermittent production mode, the difference can be generated among different batches, and the mixed slurry is more and more uniform only by prolonging the mixing time, so that the material difference is smaller, and compared with a continuous production mode, such as a double-screw extruder, a high-speed dispersing machine and the like, the mixing efficiency of the double-planetary mixer is relatively lower. However, when a parallel double-screw extruder is used for pulping, heat is generated due to the bending deformation of the screw and friction of the cylinder wall, more metal particles are generated, and the method is not suitable for preparing the lithium battery anode slurry.

In summary, how to solve the problems of intermittent production and variability among different batches of the existing double-planetary mixer and improve the problems of bending deformation and easy contact abrasion with the cylinder wall of the screw caused by large length-diameter ratio of the double-screw extruder is a urgent problem to be solved by the present technicians in the field.

Disclosure of Invention

In view of the above, the utility model aims to provide a double-planetary screw mixer with two ends supported, which can solve the problems of intermittent production and difference among different batches of the existing double-planetary mixer, and improve the problems of screw deflection deformation and easy contact abrasion with a cylinder wall caused by large length-diameter ratio of a double-screw extruder.

In order to achieve the above object, the present utility model provides the following technical solutions:

a double-planetary screw mixer supported at both ends, comprising:

a drive device comprising an input shaft system for circumferential rotation;

the first end of the sun shaft system is connected with the input shaft system through gear engagement;

the planetary shaft system comprises two planetary shafts, and the planetary shafts are connected with the second end of the sun shaft system through gear meshing so as to enable the planetary shaft system to perform planetary motion around the sun shaft system;

the machine barrel is provided with a feed inlet at the top and a discharge outlet at the bottom;

the mixing device comprises two screws which are arranged in the machine barrel in parallel, and the two screws are used for mixing materials in a matched rotation mode;

the passive connecting seats are arranged at the first ends of the machine barrels to support the screws, and the first ends of the two screws penetrate through the passive connecting seats and are coaxially connected with the planetary shafts;

the double-planetary transmission box is arranged at the first end of the passive connecting seat and is used for axially mounting the planetary shaft system, and the sun shaft system is connected with the double-planetary transmission box through a key;

and the passive transmission device is arranged at the second end of the machine barrel, and the second ends of the two screw rods are connected with the passive transmission device.

Preferably, the driving device comprises a motor, an input shaft system connected with the motor, a reduction gearbox connected with the input shaft system and a base, wherein the motor and the reduction gearbox are arranged on the base, and the reduction gearbox is connected with a sun shaft system.

Preferably, the input shaft system comprises an input shaft and a driving gear sleeved on the periphery of the second end of the input shaft, and the first end of the input shaft is connected with the motor;

the sun shaft system comprises a sun shaft, a driven gear sleeved on the periphery of the first end of the sun shaft and a sun gear sleeved on the periphery of the second end of the sun shaft, the input shaft and the sun shaft are arranged in the reduction gearbox, and the driven gear is meshed with the driving gear.

Preferably, a non-through sun shaft lightening hole is formed in the sun shaft, and the end part of the sun shaft lightening hole is plugged through a sun shaft sealing plate.

Preferably, the planetary shaft system comprises two planetary shafts, two planetary gears respectively sleeved on the outer peripheral part of the first end of the planetary shafts, and planetary shaft involute external splines arranged on the second end of the planetary shafts;

the sun shaft is connected with the double planetary transmission boxes through a transmission flat key for transmission, and the spline housing correspondingly connects the planetary shaft involute external spline with the screw involute external spline of the screw through an involute spline pair.

Preferably, the double-planetary transmission case comprises a transmission case body arranged at the first end of the passive connecting seat, the first end of the transmission case body is connected with a transmission case cover, and the second end of the transmission case body is connected with a transmission case shaft end cover and a central cover plate;

the side part of the transmission box body is provided with a spline housing mounting hole for mounting the spline housing and a sun gear mounting hole for mounting the sun gear, and the spline housing mounting hole and the sun gear mounting hole are both provided with a mounting hole cover plate.

Preferably, the machine barrel comprises a barrel body which is penetrated along the axial direction, a machine barrel sealing packing arranged between the passive connecting seat and the barrel body, and a packing gland;

the first end of the cylinder is provided with the packing gland to axially limit the cylinder sealing packing, and the second end of the cylinder is connected with the passive transmission device outer cylinder of the passive transmission device.

Preferably, the passive transmission device comprises the passive transmission device outer cylinder, a passive transmission device sealing cover arranged at the second end of the passive transmission device outer cylinder, and a passive transmission seat connected with the second end of the screw;

and the passive transmission seat is sequentially provided with a passive transmission seat sealing packing, a passive transmission seat bearing and a passive transmission seat sealing plate.

Preferably, the screw comprises a driving screw head and a screw mandrel, a screw is arranged on the periphery of the screw mandrel, and the second end of the screw mandrel is connected with the driving screw head;

the screw mandrel sealing packing, the first screw mandrel bearing inner ring limit, the second screw mandrel bearing and the second screw mandrel bearing inner ring limit are sequentially arranged at the first end of the screw mandrel;

the driving screw head sealing packing, the driving screw head bearing and the driving screw head bearing inner ring are arranged between the second end of the driving screw head and the driven transmission device in sequence in a limiting way.

Preferably, the periphery of the screw mandrel is sequentially provided with at least two sections of mixing spirals, at least two sections of first lead feeding spirals, at least two sections of second lead feeding spirals and at least two sections of reverse spirals along the axial direction;

the mixing spiral, the first lead feeding spiral and the second lead feeding spiral are forward spirals, and the lead of the first lead feeding spiral is larger than that of the second lead feeding spiral.

When the double-planetary screw mixer with the two end supports is used, the driving device is controlled to operate so as to drive the input shaft system to rotate positively, the sun shaft system connected with the input shaft system through gear engagement can rotate reversely, and the planetary shaft connected with the sun shaft system through gear engagement can rotate positively. Because the sun shaft system is connected with the double-planetary transmission case through the key, the double-planetary transmission case can also reversely rotate along with the sun shaft system. Finally, the screw rod coaxially connected with the planetary shaft can rotate positively relative to the double-planetary transmission box, and the output of the screw rod is planetary motion of rotating in the forward direction and revolving in the reverse direction. And a passive transmission connected to the second ends of the two screws will revolve in opposite directions with the screws.

Then, the materials can enter the machine barrel through the feed inlet of the machine barrel, and the materials are continuously stirred under the reverse rotation of the two planetary rotating screws. Because the forward rotation of screw rod produces the velocity difference with reverse revolution, forms strong shearing, has strengthened the dispersion of material, produces the trend that the flow is more chaotic for different materials mix more even, and finally, the material accessible bin outlet discharges, with the problem of solving current double planetary mixer intermittent type production, having the difference between different batches. Because the driving mode of the screw is a double-planetary driving mode, the materials in direct contact with the screw are limited, the direct forward pushing of the screw edges on the screw to the materials is reduced, the materials have longer residence time in the machine barrel, and the materials are more fully mixed.

And the two ends of the screw are respectively supported by the passive connecting seat and the passive transmission device, so that the situation that rotation parts are subjected to uneven stress and locked due to the bending deformation of the screw is avoided, namely, the two ends of the screw are supported, the running stability of the screw is improved, and the problems that the screw is bent and deformed and is easy to contact and wear with the inner wall of a machine barrel due to the large length-diameter ratio of the double-screw extruder are solved.

In summary, the double-planetary screw mixer with two ends supported by the utility model can solve the problems of intermittent production and difference among different batches of the existing double-planetary mixer, and improve the problems of bending deformation and contact abrasion of the screw and the cylinder wall caused by large length-diameter ratio of the double-screw extruder.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a double-planetary screw mixer with two-end support according to the present utility model;

FIG. 2 is a detailed view of the input side structure of a two-end supported twin-planetary screw mixer from a top view;

FIG. 3 is a detailed view of the input side structure of a two-end supported double-planetary screw mixer in front view;

FIG. 4 is a detailed view of the output side structure of a two-end supported double-planetary screw mixer in top view;

FIG. 5 is a detailed view of the output side structure of a double-planetary screw mixer with two ends supported in front view;

fig. 6 is a schematic diagram of the structure of the sun shaft, the planet shaft, the double-planet transmission case and the passive connection base.

In fig. 1-6:

the driving device comprises a driven driving device 1, a driven driving device sealing cover 101, a driven driving device outer cylinder 102, a driven driving seat 103, a driven driving seat lightening hole 104, a driven driving seat sealing packing 105, a driven driving seat bearing 106 and a driven driving seat sealing plate 107;

the method comprises the steps of 2, namely a screw, 201 a drive screw head, 202 a drive screw head connecting screw thread, 203 a drive screw head sealing packing, 204 a drive screw head bearing, 205 a drive screw head bearing inner ring limit, 206 a mixing screw, 207 a first lead feeding screw, 208 a second lead feeding screw, 209 a screw mandrel, 210 a screw involute external spline, 211 a screw mandrel sealing packing, 212 a first screw mandrel bearing, 213 a first screw mandrel bearing inner ring limit, 214 a second screw mandrel bearing, 215 a second screw mandrel bearing inner ring limit and 216 a reverse screw;

3 is a machine barrel, 301 is a machine barrel, 302 is a feed inlet, 303 is a discharge outlet, 304 is a bracket, 305 is a machine barrel sealing packing, and 306 is a packing gland;

the passive connecting seat is 4, the passive connecting seat lightening hole is 401, the passive connecting seat lightening hole sealing plate is 402, and the shaft end cover is 403;

5 is a spline housing;

6 is a double-planetary transmission case, 601 is a transmission case body, 602 is a transmission case cover, 603 is a transmission case shaft end cover, 604 is a central cover plate, 605 is a spline housing mounting hole, and 606 is a sun gear mounting hole;

7 is a planetary shaft system, 701 is a planetary shaft, 702 is a planetary gear, 703 is a planetary shaft involute external spline;

8 is a sun shaft system, 801 is a sun shaft, 802 is a sun wheel, 803 is a sun wheel fixing bolt, 804 is a sun shaft transmission flat key, 805 is a driven gear, 806 is a sun shaft lightening hole, 807 is a sun shaft lightening hole sealing plate;

9 is a reduction gearbox, 901 is an upper box body, 902 is a lower box body, 903 is a shaft end cover plate of the reduction gearbox;

10 is an input shaft system, 1001 is an input shaft, 1002 is a driving gear;

the base is 11, the motor is 12, and the supporting roller is 13.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model aims to provide a double-planetary screw mixer with two ends supported, which can solve the problems of batch production and difference among different batches of the existing double-planetary mixer and improve the problems of flexible deformation and easy contact abrasion with a cylinder wall of a screw caused by large length-diameter ratio of the double-screw extruder.

Please refer to fig. 1 to 6.

The embodiment provides a double planetary screw mixer that both ends supported, includes:

a drive device comprising an input shaft 10 for circumferential rotation;

a sun shaft system 8, a first end of which is connected with an input shaft system 10 through gear engagement;

a planetary shaft system 7, which comprises two planetary shafts 701, wherein the planetary shafts 701 are connected with the second end of the sun shaft system 8 through gear engagement, so that the planetary shaft system 7 performs planetary motion around the sun shaft system 8;

barrel 3, the top of which is provided with a feed inlet 302, and the bottom of which is provided with a discharge outlet 303;

the mixing device comprises two screws 2 which are arranged in the machine barrel 3 in parallel, and the two screws 2 are used for mixing materials in a matched rotation way;

the passive connecting seat 4 is arranged at the first end of the machine barrel 3 to support the screw rods 2, and the first ends of the two screw rods 2 penetrate through the passive connecting seat 4 and are coaxially connected with the planetary shaft 701;

the double-planetary transmission box 6 is arranged at the first end of the passive connecting seat 4 and is used for axially mounting the planetary shaft system 7, and the sun shaft system 8 is connected with the double-planetary transmission box 6 through keys;

and the driven transmission device 1 is arranged at the second end of the machine barrel 3, and the second ends of the two screws 2 are connected with the driven transmission device 1.

The first end of the present application corresponds to the left end of the drawing, and the second end corresponds to the right end of the drawing. The center of the passive connecting seat 4 is provided with a passive connecting seat lightening hole 401 which is not penetrated from the left side, partial materials are removed through drilling, so that the weight of the passive connecting seat 4 is effectively reduced, the strength of the passive connecting seat 4 is not affected, in order to avoid dust accumulation in the passive connecting seat lightening hole 401, the passive connecting seat lightening hole 401 is blocked by welding a passive connecting seat lightening hole sealing plate 402, and a shaft end blocking cover 403 is fastened with the first end of the passive connecting seat 4 through threaded connection, so that the second screw mandrel bearing outer ring 214 of the screw 2 is prevented from falling off.

On the basis of the above embodiment, preferably, the driving device includes a motor 12, an input shaft system 10 connected with the motor 12, a reduction gearbox 9 connected with the input shaft system 10, and a base 11, where the motor 12 and the reduction gearbox 9 are both disposed on the base 11, and the reduction gearbox 9 is connected with the sun shaft system 8. Thus, the motor 12 may be controlled to operate to transmit power to the sun shaft 8 through the input shaft 10 and the reduction gearbox 9.

Preferably, the input shaft system 10 includes an input shaft 1001 and a driving gear 1002 fitted around the outer periphery of the second end of the input shaft 1001, and the first end of the input shaft 1001 is connected to a motor 12;

the sun shaft 8 includes a sun shaft 801, a driven gear 805 fitted around the outer periphery of the first end of the sun shaft 801, and a sun gear 802 fitted around the outer periphery of the second end of the sun shaft 801, and both the input shaft 1001 and the sun shaft 801 are disposed in the reduction gearbox 9, with the driven gear 805 meshing with the driving gear 1002.

The reduction gearbox 9 includes an upper box 901, a lower box 902 and a reduction gearbox shaft end cover plate 903, wherein the upper box 901 and the lower box 902 are connected by a flange and fastened by screw connection; the shaft end cover plate 903 of the reduction gearbox is fastened with the upper box 901 and the lower box 902 which are installed through threaded connection. The driving gear 1002 is fitted around the second end outer periphery of the input shaft 1001, and is integrally formed therewith. In addition, bearings and bearing inner rings are mounted on both sides of the input shaft 1001, and the left end of the input shaft 1001 is directly connected with the motor 12 or connected with the motor through a coupling. The driven gear 805 is fitted around the outer periphery of the sun shaft 801, and is integrally formed with bearings and bearing inner rings, and the bearings and bearing inner rings are mounted on both sides of the sun shaft 801.

In assembling the driving device, firstly, the motor 12 and the reduction gearbox 9 may be mounted on the base 11, then, the lower box 902 with the input shaft system 10 mounted thereon is mounted and fixed on the base 11, then, the motor 12 is connected with the input shaft 1001, then, the mounted sun shaft system 8 is mounted in the lower box 902, the phase of the driven gear 805 is adjusted by manually rotating the sun shaft system 8, the driven gear 805 and the driving gear 1002 are engaged with each other, and finally, the upper box 901 and the reduction gearbox shaft end cover 903 are assembled.

Preferably, a sun shaft 801 is provided with a sun shaft lightening hole 806 which is not penetrated, and the end of the sun shaft lightening hole 806 is sealed by a sun shaft sealing plate 807.

The sun shaft 801 and the sun gear 802 are connected and driven by a sun gear fixing bolt 803, and a sun shaft driving flat key 804 is mounted on the sun shaft 801 to be connected and driven with the double planetary gear box 6. The sun shaft lightening hole 806 is a hole machined from the left end of the center of the sun shaft 801, the size and depth of a drilled hole cannot influence the installation of the sun gear fixing bolt 803, the weight of the sun shaft 801 can be effectively reduced by the material removed through the drilled hole, the strength of the sun shaft 801 is not influenced, and in order to avoid dust accumulation in the sun shaft lightening hole 806, the sun shaft lightening hole 806 is blocked by welding the sun shaft lightening hole sealing plate 807.

On the basis of the above embodiment, it is preferable that the planetary shaft system 7 includes two planetary shafts 701, two planetary gears 702 respectively fitted around the outer peripheral portions of the first ends of the planetary shafts 701, and planetary shaft involute external splines 703 provided at the second ends of the planetary shafts 701;

the sun shaft 801 is connected with the double planetary transmission case 6 through a transmission flat key 804 for transmission, and the spline housing 5 correspondingly connects the planetary shaft involute external spline 703 with the screw involute external spline 210 of the screw 2 through an involute spline pair. That is, the planetary gear 702 is sleeved on the outer periphery of the first end of the planetary shaft 701, and the planetary gear 702 and the first end are integrally machined. In addition, bearings and bearing inner ring limit are also arranged on two sides of the planetary shaft 701.

Preferably, the double-planetary gear box 6 comprises a gear box body 601 arranged at the first end of the passive connecting seat 4, the first end of the gear box body 601 is fastened with a gear box sealing cover 602 through threaded connection, and the second end of the gear box body 601 is fastened with a gear box shaft end blocking cover 603 and a central cover plate 604 through threaded connection;

the side of the transmission case 601 is provided with a spline housing mounting hole 605 for mounting the spline housing 5 and a sun gear mounting hole 606 for mounting the sun gear 802, and the spline housing mounting hole 605 and the sun gear mounting hole 606 are both provided with a mounting hole cover plate and a sealing gasket.

And can set up two sets of backing rolls 13 below double-planetary gear box 6, two sets of backing rolls 13 symmetrical arrangement plays the supporting role to double-planetary gear box 6, simultaneously, can assist double-planetary gear box 6 to realize revolution.

Preferably, the barrel 3 comprises a barrel 301 which penetrates along the axial direction, a barrel sealing packing 305 arranged between the passive connector 4 and the barrel 301 and a packing gland 306;

the first end of the barrel 301 is provided with a packing gland 306 to axially define a barrel seal packing 305 and the second end of the barrel 301 is connected to the passive transmission outer barrel 102 of the passive transmission 1.

The left and right ends of the cylinder 301 may be welded with connection flanges and perforated, the connection flanges at the left and right ends are respectively used to connect the packing gland 306 and the outer cylinder 102 of the passive transmission device, and the upper and lower ends of the cylinder 301 are respectively welded with a feed inlet 302 and a discharge outlet 303. And, two supports 304 for supporting may be welded under the cylinder 301. The cylinder sealing packing 305 is located between the passive connecting seat 4 and the cylinder 301, plays a role in supporting and dynamic sealing, and the packing gland 306 is fastened with the cylinder 301 through threaded connection, so that an axial limiting effect is achieved on the cylinder sealing packing 305.

Preferably, the passive transmission 1 includes a passive transmission outer cylinder 102, a passive transmission cover 101 provided at a second end of the passive transmission outer cylinder 102, and a passive transmission seat 103 for connection with a second end of the screw 2; the passive transmission seat 103 is provided with a passive transmission seat sealing packing 105, a passive transmission seat bearing 106 and a passive transmission seat sealing plate 107 in sequence.

The passive transmission cover 101 is a detachable structure, and is fastened to the passive transmission outer tube 102 by a threaded connection, and the left side of the passive transmission outer tube 102 is a flange structure, which is fastened to the right flange of the cylinder 301 by a threaded connection.

And, can open in the middle of passive transmission seat 103 has passive transmission seat lightening hole 104, installs passive transmission seat seal packing 105, passive transmission seat bearing 106 on the passive transmission seat 103 to finally install passive transmission seat shrouding 107 through threaded connection, passive transmission seat shrouding 107 can stop external foreign matter entering inside, avoid influencing the rotation of the drive screw head 201 of screw rod 2, can play inner circle axial limiting displacement to passive transmission seat bearing 106 again.

On the basis of the above embodiment, preferably, the screw 2 includes a drive screw head 201 and a screw spindle 209, a screw is provided on the outer periphery of the screw spindle 209, and a second end of the screw spindle 209 is connected with the drive screw head 201;

the screw mandrel sealing packing 211, the first screw mandrel bearing 212, the first screw mandrel bearing inner ring limit 213, the second screw mandrel bearing 214 and the second screw mandrel bearing inner ring limit 215 are sequentially arranged at the first end of the screw mandrel 209;

the drive screw head sealing packing 203, the drive screw head bearing 204 and the drive screw head bearing inner ring limit 205 are sequentially arranged between the second end of the drive screw head 201 and the driven transmission device 1.

Preferably, at least two sections of mixing spirals 206, at least two sections of first lead feeding spirals 207, at least two sections of second lead feeding spirals 208 and at least two sections of reverse spirals 216 are sequentially arranged on the periphery of the screw mandrel 209 along the axial direction; the mixing screw 206, the first lead feeding screw 207 and the second lead feeding screw 208 are all forward screws, and the lead of the first lead feeding screw 207 is greater than the lead of the second lead feeding screw 208.

The driving screw head 201 is connected and fastened with the screw spindle 209 through the driving screw head connecting screw thread 202, and the screw 2 and the driven transmission device 1 are installed after the driving screw head sealing packing 203, the driving screw head bearing 204 and the driving screw head bearing inner ring limit 205 are installed; the multi-stage mixing screw 206, the multi-stage first lead feeding screw 207, the multi-stage second lead feeding screw 208, and the multi-stage reverse screw 216 are mounted on the screw mandrel 209 by involute spline connection.

And, the second lead feed screw 208 is effective to reduce the tendency of material to flow rearward. The first lead feed screw 207 enables a greater tendency for material to flow forward. The moderate lead of the mixing screw 206 can slow down the larger forward flow trend caused by the first lead feeding screw 207, effectively increasing the material residence time and enabling more thorough mixing. In addition, the reverse spiral 216 can effectively reduce the continuous forward flow trend of the materials and generate the backward flow trend, so that the materials generate staggered flow between the mixing spiral 206 and the reverse spiral 216, the mixing effect is enhanced, and the front-end material accumulation is reduced.

To further illustrate the method of using the two-end supported double planetary screw mixer provided by the utility model, an example is provided below.

The motor 12 on the base 11 is started, the output rotates forward, the forward rotation is transmitted to the driving gear 1002 through the input shafting 10, the driven gear 805 meshed with the driving gear 1002 rotates reversely, and the reverse rotation is transmitted to the sun gear 802 through the sun shafting 8; since the sun shaft 801 is connected with the transmission case 601 by a key, the transmission case 601 also rotates reversely; the planetary gear 702 meshed with the sun gear 802 rotates forward relative to the transmission box body 601, the screw rod 2 connected through the spline housing 5 also rotates forward relative to the transmission box body 601, and the planetary motion of autorotation forward rotation and revolution reverse rotation is output; the driven transmission seat 103 in the driven transmission 1 at the right end of the screw 2 performs reverse revolution along with the screw 2.

The materials enter the cylinder 301 through the feed inlet 302 and are continuously stirred under the reverse rotation of the two planetary rotating screws 2; because the screw rod 2 rotates in the forward direction and revolves in the reverse direction to generate speed difference, strong shearing is formed, the dispersion of materials is enhanced, the trend of more chaotic flowing direction is generated, and different materials are mixed more uniformly;

because the mixing screw 206, the first lead feeding screw 207 and the second lead feeding screw 208 of the screw 2 are all forward screws, the materials directly contacted with the screw 2 are conveyed forward along the screws in the process of being stirred, and the materials not directly contacted with the screw 2 also have a forward conveying trend, so that the materials entering the cylinder 301 are in a forward conveying state as a whole;

the second lead feeding screw 208 on the screw rod 2 can effectively reduce the backward flow trend of materials, the first lead feeding screw 207 can enable the materials to generate a larger forward flow trend, the lead of the mixing screw 206 is moderate, the larger forward flow trend caused by the first lead feeding screw 207 can be slowed down, the material residence time is effectively prolonged, and the materials are mixed more fully.

The reverse spiral 216 can effectively reduce the trend of the material to continue to flow forwards and generate a backward flow trend, so that the material generates staggered flow between the mixing spiral 206 and the reverse spiral 216, the mixing effect is enhanced, the accumulation of the front-end material is reduced, and the material is more favorably discharged from the discharge port 303; wherein, the passive transmission seat sealing packing 105, the transmission screw head sealing packing 203, the screw mandrel sealing packing 211, the machine barrel sealing packing 305 and the like play a role in sealing materials, and prevent the materials from penetrating into the bearing to lead the bearing to be worn.

The device has the outstanding characteristics of good stability, long material residence time, more sufficient material mixing, high reliability of multi-packing sealing, reduced abrasion and heat generation caused by bending deformation due to support at two ends, convenient disassembly, maintenance and cleaning:

1) Due to the revolution of the double planetary transmission case, the materials in direct contact with the screw 2 are limited, so that the direct forward pushing of the screw 2 to the materials by the screw is reduced, the materials have longer residence time in the cylinder 301, and the mixing is more complete;

2) All sealing points contacted with the materials are sealed by adopting a plurality of packing, so that the sealing reliability is extremely high;

3) The two ends of each rotating shaft are perfectly supported by adopting bearings and dynamic supports, so that the situation that rotary parts are locked due to uneven stress caused by bending deformation is avoided, and the running stability is extremely high;

4) Because both ends of the screw rod 2 are supported, the deflection deformation of the screw rod 2 is greatly reduced, and abrasion and friction heat generation between the screw rod 2 and the cylinder 301 are avoided.

It should be noted that, in the present application, the first end and the second end, the first screw mandrel bearing 212 and the second screw mandrel bearing 214, the first screw mandrel bearing inner ring limit 213 and the second screw mandrel bearing inner ring limit 215, the first lead feeding spiral 207 and the second lead feeding spiral 208 are mentioned, where the first and the second are merely for distinguishing the difference of the positions, and no sequential distinction is made.

It should be noted that the azimuth or positional relationship indicated by "left and right" and the like in the present application is based on the azimuth or positional relationship shown in the drawings, and is merely for convenience of description and understanding, and does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present utility model.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. Any combination of all the embodiments provided in the present utility model is within the protection scope of the present utility model, and will not be described herein.

The double-planetary screw mixer with two ends supported by the utility model is described in detail above. The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.

Claims (10)

1. Two planetary screw blendor that both ends supported, its characterized in that includes:

a drive device comprising an input shaft system (10) for circumferential rotation;

a sun shaft system (8), the first end of which is connected with the input shaft system (10) through gear engagement;

a planetary shaft system (7) comprising two planetary shafts (701), wherein the planetary shafts (701) are connected with the second end of the sun shaft system (8) through gear meshing so as to enable the planetary shaft system (7) to perform planetary motion around the sun shaft system (8); a machine barrel (3) is provided with a feed inlet (302) at the top and a discharge outlet (303) at the bottom;

the mixing device comprises two screws (2) which are arranged in the machine barrel (3) in parallel, and the two screws (2) are used for mixing materials in a matched rotation mode;

the passive connecting seats (4) are arranged at the first ends of the machine barrels (3) to support the screw rods (2), and the first ends of the two screw rods (2) penetrate through the passive connecting seats (4) and are coaxially connected with the planetary shafts (701);

the double planetary transmission box (6) is arranged at the first end of the passive connecting seat (4) and is used for axially mounting the planetary shaft system (7), and the sun shaft system (8) is connected with the double planetary transmission box (6) through a key;

and the driven transmission device (1) is arranged at the second end of the machine barrel (3), and the second ends of the two screw rods (2) are connected with the driven transmission device (1).

2. The double-planetary screw mixer with two ends supported according to claim 1, wherein the driving device comprises a motor (12), an input shaft system (10) connected with the motor (12), a reduction gearbox (9) connected with the input shaft system (10) and a base (11), the motor (12) and the reduction gearbox (9) are arranged on the base (11), and the reduction gearbox (9) is connected with the solar shaft system (8).

3. The double-planetary screw mixer with two ends supported according to claim 2, wherein the input shaft system (10) comprises an input shaft (1001) and a driving gear (1002) sleeved on the outer periphery of the second end of the input shaft (1001), and the first end of the input shaft (1001) is connected with the motor (12);

the sun shaft system (8) comprises a sun shaft (801), a driven gear (805) sleeved on the outer periphery of the first end of the sun shaft (801) and a sun gear (802) sleeved on the outer periphery of the second end of the sun shaft (801), the input shaft (1001) and the sun shaft (801) are arranged in the reduction gearbox (9), and the driven gear (805) is meshed with the driving gear (1002).

4. A double-planetary screw mixer with two ends supported according to claim 3, wherein a sun shaft lightening hole (806) is arranged in the sun shaft (801), and the end part of the sun shaft lightening hole (806) is plugged by a sun shaft sealing plate 807.

5. A twin-planetary screw mixer supported at both ends according to claim 3, characterized in that the planetary shaft system (7) comprises two planetary shafts (701), two planetary gears (702) respectively sleeved on the outer peripheral parts of the first ends of the planetary shafts (701), and planetary shaft involute external splines (703) provided on the second ends of the planetary shafts (701);

the sun shaft (801) is connected with the double-planetary transmission box (6) through a transmission flat key (804) for transmission, and the spline housing (5) is correspondingly connected with the planetary shaft involute external spline (703) and the screw involute external spline (210) of the screw (2) through an involute spline pair.

6. The double-planetary screw mixer with two ends supported according to claim 5, wherein the double-planetary transmission box (6) comprises a transmission box body (601) arranged at the first end of the passive connecting seat (4), the first end of the transmission box body (601) is connected with a transmission box cover (602), and the second end of the transmission box body (601) is connected with a transmission box shaft end baffle cover (603) and a central cover plate (604);

spline housing mounting holes (605) for mounting the spline housing (5) and sun gear mounting holes (606) for mounting the sun gear (802) are formed in the side portions of the transmission housing body (601), and the spline housing mounting holes (605) and the sun gear mounting holes (606) are both provided with mounting hole cover plates.

7. The two-end supported double-planetary screw mixer according to any one of claims 1 to 6, characterized in that the barrel (3) comprises a barrel (301) passing through axially, a barrel sealing packing (305) and a packing gland (306) arranged between the passive connection seat (4) and the barrel (301);

the first end of the cylinder (301) is provided with the packing gland (306) to axially define the cylinder sealing packing (305), and the second end of the cylinder (301) is connected with the passive transmission outer cylinder (102) of the passive transmission (1).

8. The two-end supported double planetary screw mixer according to claim 7, characterized in that the passive transmission (1) comprises the passive transmission outer cylinder (102), a passive transmission cover (101) provided at the second end of the passive transmission outer cylinder (102), and a passive transmission seat (103) for connection with the second end of the screw (2);

the passive transmission seat (103) is sequentially provided with a passive transmission seat sealing packing (105), a passive transmission seat bearing (106) and a passive transmission seat sealing plate (107).

9. The two-end supported double-planetary screw mixer according to any one of claims 1 to 6, wherein the screw (2) comprises a drive screw head (201) and a screw spindle (209), a screw is provided at the outer periphery of the screw spindle (209), and a second end of the screw spindle (209) is connected to the drive screw head (201);

the screw mandrel sealing packing (211), the first screw mandrel bearing (212), the first screw mandrel bearing inner ring limit (213), the second screw mandrel bearing (214) and the second screw mandrel bearing inner ring limit (215) are sequentially arranged at the first end of the screw mandrel (209);

the driving screw head sealing packing (203), the driving screw head bearing (204) and the driving screw head bearing inner ring limit (205) are sequentially arranged between the second end of the driving screw head (201) and the driven transmission device (1).

10. The double-planetary screw mixer with two ends supported according to claim 9, wherein the outer periphery of the screw mandrel (209) is provided with at least two sections of mixing screws (206), at least two sections of first lead feeding screws (207), at least two sections of second lead feeding screws (208) and at least two sections of reverse screws (216) in sequence along the axial direction;

the mixing spiral (206), the first lead feeding spiral (207) and the second lead feeding spiral (208) are all forward spirals, and the lead of the first lead feeding spiral (207) is larger than that of the second lead feeding spiral (208).