CN114177865A - Rigid-flexible splicing stirring device and chaotic variable-frequency stirring method thereof - Google Patents
Rigid-flexible splicing stirring device and chaotic variable-frequency stirring method thereof Download PDFInfo
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- CN114177865A CN114177865A CN202111452145.1A CN202111452145A CN114177865A CN 114177865 A CN114177865 A CN 114177865A CN 202111452145 A CN202111452145 A CN 202111452145A CN 114177865 A CN114177865 A CN 114177865A
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- 238000003756 stirring Methods 0.000 title claims abstract description 109
- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000000739 chaotic effect Effects 0.000 title claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 45
- 238000007599 discharging Methods 0.000 claims abstract description 11
- 238000010907 mechanical stirring Methods 0.000 claims abstract description 10
- 239000007921 spray Substances 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims description 28
- 230000008859 change Effects 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 7
- 230000001133 acceleration Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 10
- 238000002955 isolation Methods 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
- B01J19/0066—Stirrers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
- B01J4/005—Feed or outlet devices as such, e.g. feeding tubes provided with baffles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/008—Feed or outlet control devices
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Abstract
The invention discloses a rigid-flexible splicing stirring device and a chaotic variable-frequency stirring method thereof, wherein the chaotic variable-frequency stirring method comprises the following steps of: the method comprises the following steps: determining the type and material of the paddle and the diameter-length ratio of the rigid part and the flexible part according to the material and the working condition; step two: determining the variable frequency voltage of a driving motor and the jet flow strength of a spray gun according to the characteristics of materials and working conditions; step three: feeding and discharging materials at a designated speed through a feeding and discharging controller, carrying out mechanical stirring and airflow stirring according to the variable frequency voltage of the driving motor and the jet flow strength of the spray gun in the step two, and controlling the baffle to carry out intermittent mechanical motion through the driving motor; step four: after the stirring is finished, the driving motor, the air pump and the flow controller are closed, and the material is controlled to flow out of the discharge hole by the feeding and discharging controller.
Description
Technical Field
The invention relates to the technical field of stirring equipment, in particular to a rigid-flexible splicing stirring device and a chaotic variable-frequency stirring method thereof.
Background
Mechanical stirring makes a multiphase flow mixing operation which is most common and widely applied in the metallurgical and chemical industries. When high-viscosity materials are stirred, a large amount of energy is consumed by the traditional rigid paddle, and an isolated mixing isolation area can be formed, so that the materials are pseudo-uniform in the stirring process; when the polymer material sensitive to shearing is stirred, the structure and the structure of the polymer material are easily damaged by the shearing force, so the borne stirring rotating speed cannot be too high; under the working condition of high viscosity and low rotating speed, the suction surface of the rigid paddle is easy to form air pockets, so that a large amount of energy is consumed while the stirring effect is influenced; the traditional flexible paddle can effectively reduce the cavitation amount and eliminate an isolated mixed isolation region, but the flexibility and the fault ratio are greatly influenced by the viscosity of a solution, and the improper flexibility and solid ratio can cause the waste of energy; meanwhile, the flexible paddle is easy to damage due to large shearing force, and needs to be replaced. And the prior art does not have a composite stirring mode of combining two rigid and flexible stirring paddles according to a proper proportion of material viscosity adjustment, the conventional stirring generally adopts one of mechanical stirring or airflow stirring, the stirring mode is single, the stirring effect is poor, and the mechanical stirring generally adopts a constant-speed motor to drive the stirring paddles to stir, so that the uniform mixing of materials can not be realized by using lower stirring energy, and therefore a mixing and stirring device and a method which are capable of stirring by using the rigid and flexible stirring paddles and compounding mechanical stirring and airflow stirring are urgently needed.
Disclosure of Invention
The invention aims to provide a rigid-flexible splicing stirring device and a chaotic variable-frequency stirring method thereof, so as to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a rigid-flexible splicing and stirring device which comprises a reaction kettle, wherein a feed inlet is formed in the top of the reaction kettle, a mechanical stirrer is rotationally connected in the reaction kettle, the mechanical stirrer is connected with a driving motor, the driving motor is electrically connected with a motor controller, a plurality of side nozzles are fixedly mounted on the side wall of the reaction kettle, the side nozzles are communicated with an air pump and a flow controller, a baffle is mounted in the reaction kettle, the baffle is rotationally connected with the driving motor through a transmission part, and a discharge outlet is formed in the bottom of the reaction kettle.
Preferably, the mechanical stirrer comprises a stirring shaft, an airflow channel is formed in the middle of the stirring shaft, the top of the stirring shaft is communicated with an air pump, a cyclone is fixedly mounted in the stirring shaft, a rigid blade is detachably connected to the outer wall of the stirring shaft, and a flexible blade is fixedly connected to one end of the stirring shaft far away from the rigid blade.
Preferably, the transmission part is a sheave mechanism, the sheave mechanism comprises a notch disc and a sheave which are matched, the notch disc is in transmission connection with the driving motor through a bevel gear set, the notch disc is fixedly connected with a rotating arm, one end, far away from the notch disc, of the rotating arm is fixedly connected with a cylindrical pin, a sliding groove matched with the cylindrical pin is formed in the sheave, and the sheave is fixedly connected with the baffle.
A chaotic variable frequency stirring method of a rigid-flexible splicing stirring device comprises the following steps:
the method comprises the following steps: determining the type and material of the paddle and the diameter-length ratio of the rigid part and the flexible part according to the material and the working condition;
step two: determining the variable frequency voltage of a driving motor and the jet flow strength of a spray gun according to the characteristics of materials and working conditions;
step three: feeding and discharging materials at a designated speed through a feeding and discharging controller, carrying out mechanical stirring and airflow stirring according to the variable frequency voltage of the driving motor and the jet flow strength of the spray gun in the step two, and controlling the baffle to carry out intermittent mechanical motion through the driving motor;
step four: after the stirring is finished, the driving motor, the air pump and the flow controller are closed, and the material is controlled to flow out of the discharge hole by the feeding and discharging controller.
Preferably, the driving motor is a variable speed motor, and the variable speed process of the driving motor follows the following formula:
wherein, wrIn order to drive the motor speed, a is the maximum speed that the drive motor can bear, k is a fixed parameter value of 3.9, i is a natural number, i is 0,1,2,3,4 … …, x is an iteration coefficient and is used for representing the speed of the drive motor at the next iteration node, and x is the rotation speed of the drive motor at the next iteration node0＝0.1。
Preferably, in the process of speed change of the driving motor, when the viscosity of the material is less than 0.3mpa, the time difference between the iterative speed change points is controlled to be 10s, when the viscosity of the material is more than 0.3mpa and less than 0.7mpa, the time difference between the iterative speed change points is controlled to be 20s, and when the viscosity of the material is more than 0.7mpa, the time difference between the iterative speed change points is controlled to be 25 s.
Preferably, the diameter-length ratio of the diameter of the stirring tank to the diameter of the blade in the reaction kettle is not less than 3: 2.
preferably, the specific determination method in the step one is as follows:
when the material viscosity is greater than 0.7mpa, the paddle adopts a mode of combining the short rigid blade with the long flexible blade, the ratio of the short rigid blade to the long flexible blade is not less than 1:2, when the material viscosity is less than 0.7mpa, the long rigid blade and the short flexible blade are combined, and the ratio of the long rigid blade to the short flexible blade is not less than 2: 1.
Preferably, the stirring work is carried out in a reaction kettle, and the volume of the reaction kettle is 10-30 cubic; when the driving motor enters an acceleration stage, the air pump above the stirring shaft starts to work, air is pumped in for 25-50 m/s, and the air pump above the stirring shaft stops working 5s before the driving motor decelerates.
Preferably, the drive motor is controlled by an open-loop control method by adopting a control square wave, so that the drive motor can be rapidly changed in speed.
The invention discloses the following technical effects: according to the invention, the rigid blade and the flexible blade are combined, the flexible blade is arranged at the tip, so that air pockets formed between suction surfaces of the stirring paddle can be effectively reduced, the small disturbance at the tip of the paddle can inhibit the stable existence of an isolated mixing isolation region, the stirring efficiency is improved, then the swirling flow gas is introduced to assist in stirring, the stirring effect is good, the ratio of the rigid blade to the flexible blade is reasonably matched according to different mineral physical properties, and the stirring uniformity can be realized by using the lowest stirring energy; the baffle is arranged on the side face, and the baffle is controlled to perform intermittent mechanical motion through the driving motor, so that the baffle can assist airflow to form rotating airflow, dead zones can be effectively reduced through periodic rotation, and the efficiency of the baffle is improved; according to the invention, the variable frequency motor is adopted to drive the stirring paddle, and the micro disturbance of the flow field in the stirring tank in the reaction kettle is realized through the variable frequency of the driving motor, so that the horseshoe effect of Martiff is realized, and the stirring efficiency is improved; the invention has simple structure and convenient operation, utilizes the variable frequency motor to control the rotation of the stirring shaft, combines mechanical stirring and airflow stirring, and has good stirring effect by matching the rigid blade and the flexible blade for stirring.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic view of the structure of a stirring device according to the present invention;
FIG. 2 is a schematic view of the structural connection between the stirring shaft and the blades of the present invention;
FIG. 3 is a schematic view of the transmission portion of the present invention;
FIG. 4 is a graph of the speed of the drive motor over time;
FIG. 5 is a schematic structural view of a blade according to a second embodiment;
wherein: 1-a reaction kettle, 2-a feed inlet, 3-a driving motor, 4-a motor controller, 5-a side nozzle, 6-an air pump and a flow controller, 7-a baffle, 8-a discharge outlet, 9-a stirring shaft, 10-a swirler, 11-a rigid blade, 12-a flexible blade, 13-a notched disc, 14-a grooved wheel, 15-a rotating arm, 16-a cylindrical pin, 17-a chute and 18-a feed and discharge controller.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The first embodiment is as follows:
referring to fig. 1-4, the invention provides a rigid-flexible splicing stirring device, which comprises a reaction kettle 1, wherein a feed inlet 2 is formed in the top of the reaction kettle 1, a mechanical stirrer is rotationally connected in the reaction kettle 1, the mechanical stirrer is connected with a driving motor 3, the driving motor 3 is electrically connected with a motor controller 4, a plurality of side nozzles 5 are fixedly installed on the side wall of the reaction kettle 1, the side nozzles 5 are communicated with an air pump and a flow controller 6, a baffle 7 is installed in the reaction kettle 1, the baffle 7 is rotationally connected with the driving motor 3 through a transmission part, and a discharge outlet 8 is formed in the bottom of the reaction kettle 1. Control driving motor 3 through machine controller 4 and carry out the frequency conversion, realize the small disturbance of the stirred tank internal flow field of reation kettle 1, be convenient for realize the horseshoe effect of Martifu, make the material disperse more, area of contact strengthens, improves stirring efficiency. The side nozzle 5 can blow gas, so that the gas forms a rotating airflow in the reaction kettle 1 to assist stirring.
Further optimization scheme, mechanical agitator includes (mixing) shaft 9, and airflow channel has been seted up at (mixing) shaft 9 middle part, and (mixing) shaft 9 top intercommunication has the air pump, and fixed mounting has swirler 10 in the (mixing) shaft 9, and (mixing) shaft 9 outer wall can be dismantled and be connected with rigid blade 11, and rigid blade 11 fixedly connected with flexible blade 12. The flexible blades 12 are fixed at one ends of the rigid blades 11, which are far away from the stirring shaft 9, so that the flexible blades 12 can stir at the outer side, air pockets formed between suction surfaces of the blades are effectively reduced, the stable existence of an isolated mixing isolation area can be inhibited by the tiny disturbance at the tips of the blades, and the stirring efficiency is improved.
According to the further optimized scheme, the transmission part is a sheave mechanism, the sheave mechanism comprises a notch disc 13 and a sheave 14 which are matched, the notch disc 13 is in transmission connection with the driving motor 3 through a bevel gear set, the notch disc 13 is fixedly connected with a rotating arm 15, one end, far away from the notch disc 13, of the rotating arm 15 is fixedly connected with a cylindrical pin 16, a sliding groove 17 matched with the cylindrical pin 16 is formed in the sheave 14, and the sheave 14 is fixedly connected with the baffle 7. Through the continuous rotation of the notched disc 13, the cylindrical pin 16 slides in the sliding groove 17, and the grooved pulley 14 is continuously stirred to rotate intermittently.
According to a further optimized scheme, a speed reducer is arranged between the driving motor 3 and the notch disc 13, a first conical wheel is fixedly connected to an output shaft of the speed reducer, a second conical wheel is fixedly connected to the notch disc 13, and the first conical wheel is meshed with the second conical wheel. The notched disc 13 is allowed to rotate at a proper rotation speed by the reduction of the reducer and then by the engagement of the first and second tapered wheels, and then the sheave 14 is controlled to rotate intermittently.
A chaotic variable frequency stirring method of a rigid-flexible splicing stirring device comprises the following steps:
the method comprises the following steps: determining the type and material of the paddle and the diameter-length ratio of the rigid part and the flexible part according to the material and the working condition;
step two: and determining the variable frequency voltage of the driving motor 3 and the jet flow strength of the spray gun according to the characteristics of the materials and the working conditions.
Step three: feeding and discharging materials at a specified speed through a feeding and discharging controller 18, carrying out mechanical stirring and airflow stirring according to the variable frequency voltage of the driving motor 3 and the jet flow strength of the spray gun in the step two, and controlling the baffle 7 to carry out intermittent mechanical motion through the driving motor 3; the driving motor 3 drives the baffle 7 to do periodic intermittent mechanical motion through the transmission part, so that dead zones between the baffles can be reduced, and stirring is more sufficient.
Step four: after the stirring is finished, the driving motor 3, the air pump and the flow controller 6 are closed, and the material is controlled to flow out of the discharge hole 8 by the feeding and discharging controller 18.
Further optimize the scheme, install laser emitter in reation kettle 1, adjust laser emitter's intensity and shine the plane, utilize the high-speed camera can monitor the mixed condition of material in reation kettle 1. The stirring condition in the reaction kettle 1 can be observed conveniently.
In a further optimized scheme, the driving motor 3 is a variable speed motor, and the variable speed process of the driving motor 3 follows the following formula:
wherein, wrIn order to indicate the rotation speed of the driving motor, a is the maximum rotation speed which can be carried by the driving motor, k is a fixed parameter value of 3.9, i is a natural number, i is 0,1,2,3,4 … …, x is an iteration coefficient and is used for indicating the rotation speed of the driving motor of the next iteration node, and x is0＝0.1。
In the further optimization scheme, in the speed change process of the driving motor 3, when the viscosity of the material is less than 0.3mpa, the time difference between the iterative speed change points is controlled to be 10s, when the viscosity of the material is greater than 0.3mpa and less than 0.7mpa, the time difference between the iterative speed change points is controlled to be 20s, and when the viscosity of the material is greater than 0.7mpa, the time difference between the iterative speed change points is controlled to be 25 s.
In a further optimization scheme, the diameter-length ratio of the diameter of the stirring tank to the diameter of the blade of the reaction kettle 1 is not less than 3: 2. according to experiments, the effect is not obvious when the groove diameter ratio is less than 3: 2.
Further optimizing the scheme, the specific determination method in the step one is as follows:
when the material viscosity is greater than 0.7mpa, the paddle adopts a mode of combining the short rigid blade 11 with the long flexible blade 12, the ratio of the short rigid blade 11 to the long flexible blade 12 is not less than 1:2, when the material viscosity is less than 0.7mpa, the long rigid blade 11 and the short flexible blade 12 are combined, and the ratio of the long rigid blade 11 to the short flexible blade 12 is not less than 2: 1; aiming at the diameter-length ratio of the rigid blades 11 and the flexible blades 12 which are reasonably matched with the physical properties of different materials in different stirring tanks, the flexible blades 12 can be just utilized to eliminate air pockets formed between the suction surfaces of the blades, and the lowest stirring energy is used for realizing uniform stirring.
The scheme is further optimized, stirring work is carried out in the reaction kettle 1, and the volume of the reaction kettle 1 is 10-30 cubic; when the driving motor 3 enters an acceleration stage, the air pump above the stirring shaft 9 starts to work, air is pumped in for 25m/s-50m/s, and 5s before the driving motor 3 decelerates, the air pump above the stirring shaft 9 stops working.
Further optimizing the scheme, when controlling the driving motor 3, the method of controlling square waves is adopted for open-loop control, so that the driving motor 3 can be quickly changed in speed.
According to the scheme, a PLC (programmable logic controller) and an adjusting valve are introduced into a mechanical stirring part and an air flow stirring part, the two mechanisms can be controlled, the area of a mixing area can be enhanced through mixing rotating speed and variable frequency flow, the horseshoe effect of a flow field in a stirring tank is realized, and stable cyclic change of annular large vortex-axial flow-annular large vortex is ensured to exist in the flow field.
The invention can ensure that the device realizes mixing in a short time under the low Reynolds number flow of different years, thereby greatly improving the mixing efficiency of material fluid.
According to the invention, the rotating speed of the driving motor is controlled to change according to the attached figure 4, so that the stirring time is reduced from 45 minutes to 20 minutes, the stirring efficiency is greatly improved, although partial power consumption is increased by controlling the rotating speed of the driving motor, the total power consumption is reduced by 34 percent due to the reduction of time, and the diffusion flux is increased to 9.5g/s from 7.3 g/s.
Example two: referring to fig. 5, the present embodiment discloses a rigid-flexible splicing stirring device and a chaotic frequency conversion stirring method thereof, and the present embodiment differs from the first embodiment only in that when the viscosity of the material is less than 0.7mpa, a long rigid blade 11 and a short flexible blade 12 are combined, and the ratio of the long rigid blade 11 to the short flexible blade 12 is not less than 2: 1; when the viscosity of the material is low, the air pocket formed by the rigid blade 11 in the stirring process is small, so that the flexible blade 12 with short length is adopted to be matched with the rigid blade, the influence of the air pocket can be reasonably eliminated, and the rigid blade 11 with long length can ensure the stirring effect.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (10)
1. The utility model provides a just gentle concatenation agitating unit which characterized in that:
including reation kettle (1), feed inlet (2) have been seted up at reation kettle (1) top, reation kettle (1) internal rotation is connected with mechanical agitator, mechanical agitator is connected with driving motor (3), driving motor (3) electric connection has motor controller (4), fixed mounting has a plurality of side nozzle (5) on reation kettle (1) lateral wall, side nozzle (5) intercommunication has air pump and flow controller (6), install baffle (7) in reation kettle (1), baffle (7) through transmission portion with driving motor (3) rotate and connect, discharge gate (8) have been seted up to reation kettle (1) bottom.
2. A rigid-flexible splice mixing device as defined in claim 1 wherein: mechanical agitator includes (mixing) shaft (9), airflow channel has been seted up at (mixing) shaft (9) middle part, (mixing) shaft (9) top intercommunication has the air pump, fixed mounting has swirler (10) in (mixing) shaft (9), (mixing) shaft (9) outer wall can be dismantled and is connected with rigidity blade (11), keep away from rigidity blade (11) the one end fixedly connected with flexible blade (12) of (mixing) shaft (9).
3. A rigid-flexible splice mixing device as defined in claim 1 wherein: the transmission part is a sheave mechanism, the sheave mechanism comprises a notch disc (13) and a sheave (14) which are matched, the notch disc (13) is in transmission connection with the driving motor (3) through a bevel gear set, the notch disc (13) is fixedly connected with a rotating arm (15), one end, far away from the notch disc (13), of the rotating arm (15) is fixedly connected with a cylindrical pin (16), a sliding groove (17) matched with the cylindrical pin (16) is formed in the sheave (14), and the sheave (14) is fixedly connected with the baffle (7).
4. The chaotic variable frequency stirring method of the rigid-flexible splicing stirring device based on any one of claims 1 to 3, characterized in that: the method comprises the following steps:
the method comprises the following steps: determining the type and material of the paddle and the diameter-length ratio of the rigid part and the flexible part according to the material and the working condition;
step two: determining the variable frequency voltage of the driving motor (3) and the jet flow strength of the spray gun according to the characteristics of materials and working conditions;
step three: feeding and discharging materials at a designated speed by a feeding and discharging controller (18), carrying out mechanical stirring and airflow stirring according to the variable frequency voltage of the driving motor (3) and the jet flow strength of the spray gun in the step two, and controlling the baffle (7) to carry out intermittent mechanical motion by the driving motor (3);
step four: and after the stirring is finished, closing the stirring device and collecting the materials.
5. The chaotic variable frequency stirring method of the rigid-flexible splicing stirring device according to claim 4, characterized in that: the driving motor (3) is a variable speed motor, and the variable speed process of the driving motor (3) follows the following formula:
wherein, wrIn order to drive the motor speed, a is the maximum speed that the drive motor can bear, k is a fixed parameter value of 3.9, i is a natural number, i is 0,1,2,3,4 … …, x is an iteration coefficient and is used for representing the speed of the drive motor at the next iteration node, and x is the rotation speed of the drive motor at the next iteration node0＝0.1。
6. The chaotic frequency conversion stirring method of the rigid-flexible splicing stirring device according to claim 5, characterized in that: in the speed change process of the driving motor (3), when the viscosity of the material is smaller than 0.3mpa, the time difference between the iterative speed change points is controlled to be 10s, when the viscosity of the material is larger than 0.3mpa and smaller than 0.7mpa, the time difference between the iterative speed change points is controlled to be 20s, and when the viscosity of the material is larger than 0.7mpa, the time difference between the iterative speed change points is controlled to be 25 s.
7. The chaotic variable frequency stirring method of the rigid-flexible splicing stirring device according to claim 4, characterized in that: the diameter-length ratio of the diameter of the stirring tank in the reaction kettle (1) to the diameter of the blade is not less than 3: 2.
8. The chaotic variable frequency stirring method of the rigid-flexible splicing stirring device according to claim 4, characterized in that: the specific determination method in the first step is as follows:
when the viscosity of the material is more than 0.7mpa, the paddle adopts a mode that the short rigid blade (11) is combined with the long flexible blade (12), the ratio of the short rigid blade (11) to the long flexible blade (12) is not less than 1:2, when the viscosity of the material is less than 0.7mpa, the long rigid blade (11) is combined with the short flexible blade (12), and the ratio of the long rigid blade (11) to the short flexible blade (12) is not less than 2: 1.
9. The chaotic variable frequency stirring method of the rigid-flexible splicing stirring device according to claim 4, characterized in that: stirring is carried out in the reaction kettle (1), and the volume of the reaction kettle (1) is 10-30 cubic; when the driving motor (3) enters an acceleration stage, the air pump above the stirring shaft (9) starts to work, air is pumped in for 25-50 m/s, and 5s before the driving motor (3) decelerates, the air pump above the stirring shaft (9) stops working.
10. The chaotic variable frequency stirring method of the rigid-flexible splicing stirring device according to claim 4, characterized in that: when the driving motor (3) is controlled, open-loop control is carried out by adopting a square wave control method, so that the driving motor (3) can be quickly changed in speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111452145.1A CN114177865A (en) | 2021-12-01 | 2021-12-01 | Rigid-flexible splicing stirring device and chaotic variable-frequency stirring method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111452145.1A CN114177865A (en) | 2021-12-01 | 2021-12-01 | Rigid-flexible splicing stirring device and chaotic variable-frequency stirring method thereof |
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| CN114177865A true CN114177865A (en) | 2022-03-15 |
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