CN117563789A - Centrifugal separation device and working method thereof - Google Patents
Centrifugal separation device and working method thereof Download PDFInfo
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- CN117563789A CN117563789A CN202311553540.8A CN202311553540A CN117563789A CN 117563789 A CN117563789 A CN 117563789A CN 202311553540 A CN202311553540 A CN 202311553540A CN 117563789 A CN117563789 A CN 117563789A
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- 238000000926 separation method Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000007246 mechanism Effects 0.000 claims abstract description 37
- 238000001514 detection method Methods 0.000 claims description 28
- 230000009471 action Effects 0.000 claims description 16
- 230000002829 reductive effect Effects 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 10
- 230000001360 synchronised effect Effects 0.000 claims description 7
- 230000007423 decrease Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 32
- 239000000126 substance Substances 0.000 description 42
- 238000007599 discharging Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 11
- 238000012423 maintenance Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
- B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B11/00—Feeding, charging, or discharging bowls
- B04B11/02—Continuous feeding or discharging; Control arrangements therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B13/00—Control arrangements specially designed for centrifuges; Programme control of centrifuges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
- B04B9/10—Control of the drive; Speed regulating
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- Centrifugal Separators (AREA)
Abstract
The invention relates to the technical field of separation devices, in particular to a centrifugal separation device and a working method thereof. The invention adopts a single driving structure, cancels the traditional differential mechanism, has simple and compact structure, small occupied volume, easy implementation and low cost, and drives the rotary drum to operate at variable speed through the power mechanism so as to realize the differential operation of the rotary drum and the spiral conveying shaft, thereby effectively realizing the centrifugal separation of materials.
Description
Technical Field
The invention relates to the technical field of separation devices, in particular to a centrifugal separation device and a working method thereof.
Background
The horizontal centrifuge uses a high-speed rotating drum to generate centrifugal force to trap solid particles in suspension in the drum and automatically discharge the solid particles out of the machine under the action of force; simultaneously, under the action of centrifugal force, the liquid in the suspension is thrown out through the filter medium and the small holes of the rotary drum, thereby achieving the purpose of liquid-solid separation and filtration. The existing horizontal centrifugal machine is driven by adopting a differential mechanism, specifically, an output shaft of the differential mechanism is connected with a spiral conveyer of the horizontal centrifugal machine, and a shell of the differential mechanism is connected with a rotary drum of the horizontal centrifugal machine, so that differential rotation of the spiral conveyer and the rotary drum is realized, and centrifugal separation is realized.
Disclosure of Invention
The invention aims to solve the technical problems and the technical task of improving the prior art, provides a centrifugal separation device, and solves the problems that a horizontal centrifuge in the prior art is usually driven by a differential mechanism, and has complex structure, large volume and high use and maintenance cost.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the centrifugal separation device comprises a rotary drum and a spiral conveying shaft, wherein the spiral conveying shaft is rotationally connected inside the rotary drum, a one-way bearing is connected between the rotary drum and the spiral conveying shaft, the rotary drum is in transmission connection with a power mechanism, and the rotary drum drives the spiral conveying shaft to rotate through the one-way bearing. The centrifugal separation device only adopts a single driving structure, has simple driving mode and low driving power consumption, is easy to maintain, the rotary drum is driven to rotate by the power mechanism, the spiral conveying shaft and the rotary drum are directly driven by the unidirectional bearing, the structure is simple and compact, the occupied volume is small, the implementation is easy, the cost is low, the unidirectional bearing is characterized in that the unidirectional bearing can freely rotate in one rotating direction and can be locked in the other rotating direction, in other words, the rotary drum can drive the spiral conveying shaft to rotate by the unidirectional bearing, the rotating speed of the spiral conveying shaft can be greater than or equal to the rotating speed of the rotary drum and cannot be smaller than the rotating speed of the rotary drum, namely, the spiral conveying shaft can rotate faster relative to the rotary drum, so that the rotating speed of the rotary drum can realize the differential operation of the rotary drum and the spiral conveying shaft through the control of the power mechanism, in particular, the rotary drum firstly carries out speed increasing, the spiral conveying shaft synchronously increases under the driving action of the unidirectional bearing, then the rotary drum reduces the rotating speed, and the spiral conveying shaft can maintain the original rotating speed due to inertia, and the spiral conveying shaft only reduces the speed under the action of lower system resistance, so that the spiral conveying shaft can effectively enter the centrifugal material between the rotary drum and the spiral conveying shaft and the centrifugal conveying shaft to realize the effective separation operation.
Further, two ends of the rotary drum and the spiral conveying shaft in the axial direction are respectively connected in a rotating way through rotating bearings, and one-way bearings are respectively arranged at two ends of the rotary drum and the spiral conveying shaft in the axial direction. The rotary drum and the screw conveying shaft are guaranteed to have stable rotation connection relation through the rotary bearing, rotation stability is guaranteed, high-speed rotation can be guaranteed to effectively perform centrifugal separation, the rotary drum is enabled to be more uniform and stable in driving of the screw conveying shaft through the unidirectional bearing at two ends, load of a single unidirectional bearing is reduced, service life is prolonged, and maintenance cost is reduced.
Further, the centrifugal separation device also comprises a control system, wherein the control system controls the power mechanism to drive the rotary drum to perform variable speed operation, and the control system is used for automatically controlling the power mechanism, so that the rotary drum and the spiral conveying shaft can accurately and stably operate according to a preset differential state, and the stability and the continuity of centrifugal separation are ensured.
Further, a first detection component and a second detection component are also arranged, the first detection component detects the rotating speed of the rotary drum, the second detection component detects the rotating speed of the spiral conveying shaft, and information detected by the first detection component and the second detection component is sent to the control system. The rotating speeds of the rotary drum and the spiral conveying shaft are controlled more efficiently and accurately, and centrifugal separation treatment is ensured to be carried out more effectively.
Further, the first detection component and the second detection component respectively comprise a rotating speed sensor, a synchronous belt and a gear, the gear of the first detection component is connected to the rotary drum, the second detection component is connected to the spiral conveying shaft, and the gear is in transmission connection with the rotating speed sensor through the synchronous belt. Simple structure, easy implementation, low cost, accurate and reliable rotation speed measurement.
Further, one end of the rotary drum is provided with a heavy phase outlet, the other end of the rotary drum is provided with a light phase outlet, a rotating shaft of the spiral conveying shaft is provided with a hollow part, one end of the rotating shaft is provided with a feeding hole communicated with the hollow part, and the middle part of the rotating shaft is provided with a discharging hole communicated with the hollow part. The material to be separated enters a separation chamber formed between the rotary drum and the spiral conveying shaft from the discharge port along the hollow part, the spiral conveying shaft enables the rotary drum and the spiral conveying shaft to be separated in the radial direction when rotating at high speed, the heavy phase material is located on the radial outer side, the light phase material is located on the radial inner side, the spiral conveying shaft further comprises a spiral blade arranged on the outer side of the rotating shaft, the spiral conveying shaft pushes the heavy phase material to move along the axial direction through the spiral blade to be discharged from the heavy phase outlet when rotating relative to the rotary drum, and the light phase material is located on the radial inner side and moves reversely along the axial direction to be discharged from the light phase outlet.
Further, the light phase outlet is provided with a baffle capable of adjusting the opening degree of the light phase outlet, the proportion of heavy phase substances and light phase substances contained in materials to be separated is different, the radial distribution conditions of the heavy phase substances and the light phase substances can be different during centrifugal separation, the requirements of different materials can be flexibly met through adjusting the baffle, and the heavy phase substances and the light phase substances can be ensured to be discharged from the corresponding outlets respectively.
A working method of an upper centrifugal separation device comprises the following steps:
s1, driving a rotary drum to accelerate by the power mechanism, and synchronously accelerating the spiral conveying shaft along with the rotary drum under the action of a one-way bearing;
s2, when the rotating speed of the rotating drum reaches a preset rotating speed, the rotating drum is driven by the power mechanism to reduce speed, and the spiral conveying shaft is discharged in a state that the rotating speed is higher than the rotating speed of the rotating drum;
and S3, executing the step S1 when the rotating speed of the spiral conveying shaft is reduced to a preset rotating speed II, wherein the preset rotating speed II is smaller than the preset rotating speed I.
Further, in the step S2, the power mechanism decreases the rotation speed of the drum as the rotation speed of the screw shaft decreases when discharging.
Further, in the step S2, during the discharging process, the rotation speed difference between the drum and the screw conveying shaft is kept stable at a preset differential value.
Compared with the prior art, the invention has the advantages that:
the centrifugal separation device and the working method thereof adopt a single driving structure, cancel the traditional differential mechanism, have simple and compact structure, small occupied volume, easy implementation and low cost, drive the rotary drum to operate at variable speed through the power mechanism so as to realize the differential operation of the rotary drum and the spiral conveying shaft, effectively realize the centrifugal separation of materials, and ensure that the heavy phase and the light phase obtained by separation are accurately and efficiently discharged from corresponding outlets.
Drawings
FIG. 1 is a schematic cross-sectional view of a centrifugal separator according to the present invention;
FIG. 2 is a schematic view showing the overall external structure of a centrifugal separator according to the present invention;
FIG. 3 is a schematic view of the structure of the light phase outlet of the drum;
FIG. 4 is a schematic diagram of the structure of the first and second detecting assemblies in cooperation with the drum and the screw conveying shaft;
fig. 5 is a schematic diagram of the control system in cooperation with the drum and the screw conveyor shaft.
In the figure:
the rotary drum 1, the heavy phase outlet 11, the light phase outlet 12, the baffle 13, the screw conveying shaft 2, the feed inlet 21, the hollow part 22, the discharge port 23, the power mechanism 3, the one-way bearing 4, the rotating bearing 41, the frame 5, the main bearing 51, the shell 6, the first discharge port 63, the second discharge port 64, the upper shell 61, the lower shell 62, the first detection component 71, the second detection component 72, the rotation speed sensor 711, the synchronous belt 712 and the gear 713.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The centrifugal separation device disclosed by the embodiment of the invention has the advantages of simple and compact structure, small occupied volume, high transmission efficiency, low implementation cost and easiness in maintenance.
As shown in fig. 1 to 4, a centrifugal separation device mainly comprises a rotary drum 1 and a spiral conveying shaft 2, wherein the spiral conveying shaft 2 is rotatably connected inside the rotary drum 1, a one-way bearing 4 is connected between the rotary drum 1 and the spiral conveying shaft 2, the rotary drum 1 is in transmission connection with a power mechanism 3, and the rotary drum 1 drives the spiral conveying shaft 2 to rotate through the one-way bearing 4. The unidirectional bearing 4 can rotate freely in one rotation direction and is locked in the other rotation direction, that is, the unidirectional bearing 4 can only drive unidirectionally, so that when the drum 1 rotates forwards relative to the spiral conveying shaft 2, the drum 1 can drive the spiral conveying shaft 2 to rotate along with the drum 1, and when the drum 1 rotates reversely relative to the spiral conveying shaft 2, the drum 1 cannot drive the spiral conveying shaft 2 to rotate, the drum 1 can rotate freely in the reverse direction relative to the spiral conveying shaft 2, and the drum 1 rotates reversely relative to the spiral conveying shaft 2. Furthermore, when the centrifugal separator operates, the power mechanism 3 drives the drum 1 to forward accelerate first, the spiral conveying shaft 2 synchronously forward accelerates with the drum 1 under the transmission effect of the one-way bearing, that is, the rotation speed of the spiral conveying shaft 2 is consistent with the rotation speed of the drum 1 in the process of accelerating the drum 1, the spiral conveying shaft 2 is in a static state relative to the drum 1 inside the drum 1, then the drum 1 decelerates, the spiral conveying shaft 2 maintains the original rotation speed due to inertia, the spiral conveying shaft 2 decelerates with lower deceleration under the effect of small system resistance only, so that the rotation speed of the spiral conveying shaft 2 is larger than the rotation speed of the drum 1 during decelerating the drum 1, that is, the speed of the spiral conveying shaft 2 is differential between the drum 1 and the spiral conveying shaft 2, in other words, the spiral conveying shaft 2 is in a forward rotating state relative to the drum 1 inside the drum 1, since the spiral conveying shaft 2 and the drum 1 are in a rotating state with higher absolute rotation speeds, the materials entering the space between the spiral conveying shaft 2 and the drum 1 are separated due to the effect, the heavy phase substances are separated by the effect, the heavy phase substances are close to the radial outside, the heavy phase substances are pushed by the light phase substances are pushed to the radial phase and the centrifugal phase substances are further discharged by the centrifugal phase, and the centrifugal phase substances are continuously discharged by the centrifugal phase substances are separated by the radial phase, and the centrifugal phase substances are discharged by the centrifugal phase is guaranteed, and the centrifugal phase separation effect is guaranteed.
Specifically, as shown in fig. 1, two axial ends of the rotary drum 1 are rotatably supported and connected on the frame 5 through the main bearing 51, the power mechanism 3 is specifically a motor, the rotating speed of the rotary drum 1 is conveniently and flexibly controlled, the motor is installed on the frame 5, the motor is in transmission connection with the rotary drum 1 through a transmission belt, and the whole centrifugal separation device only adopts a single driving structure, so that the centrifugal separation device has the advantages of simple and compact structure, small occupied space, low driving power consumption and high transmission efficiency. Further, the two axial ends of the rotary drum 1 and the screw conveying shaft 2 are respectively connected in a rotating way through the rotating bearings 41, so that a stable rotating connection relationship is formed between the rotary drum 1 and the screw conveying shaft 2, the rotary drum 1 and the screw conveying shaft 2 are ensured to rotate smoothly, and the unidirectional bearings 4 are respectively arranged at the two axial ends of the rotary drum 1 and the screw conveying shaft 2, so that the rotary drum 1 drives the screw conveying shaft 2 more uniformly and stably, the load of a single unidirectional bearing 4 is reduced, the service life is prolonged, and the maintenance cost is reduced.
As shown in fig. 1, the drum 1 includes two sections in its axial direction, one section being a cylindrical section of uniform diameter and the other section being a conical section of decreasing diameter toward the end, the two sections being joined as a unit. Correspondingly, the spiral conveying shaft 2 also comprises two sections in the axial direction, one section is an equal-diameter section in the cylindrical section, the other section is a conical section in the conical section, the two sections are connected into a whole, the outer diameters of the spiral blades on the equal-diameter section are kept consistent along the axial direction, and hollow holes are formed on the inner sides of the spiral blades on the equal-diameter section in the radial direction so as to allow separated light phase substances to pass through, namely, when the spiral conveying shaft 2 rotates relative to the rotary drum 1, the spiral blades on the equal-diameter section only exert an axial pushing effect on heavy phase substances on the outer sides in the radial direction, and exert no pushing effect on light phase substances on the inner sides in the radial direction, so that the heavy phase substances and the light phase substances are ensured to advance in different directions in the axial direction to be separated and discharged, and the spiral blades on the conical section are of a conical structure with the outer diameters matched with the conical section gradually reduced towards the end sides.
The heavy phase outlet 11 is arranged at one end of the rotary drum 1, the light phase outlet 12 is arranged at the end side of the conical section, the light phase outlet 12 is arranged at the end side of the cylindrical section, the light phase outlet 12 is radially close to the radially inner side, the rotating shaft of the spiral conveying shaft 2 is provided with a hollow part, one end of the rotating shaft is provided with a feed inlet 21 communicated with the hollow part, the middle part of the rotating shaft is provided with a discharge hole 23 communicated with the hollow part, materials to be separated enter a separation chamber formed between the rotary drum 1 and the spiral conveying shaft 2 from the discharge hole 23 along the hollow part 22, under the action of high-speed rotation of the rotary drum 1 and the spiral conveying shaft 2, centrifugal separation is carried out on the materials in the separation chamber, the heavy phase materials are radially outer side, the light phase materials are radially inner side, the spiral conveying shaft 2 is pushed by a spiral blade to axially move along the axial direction to be discharged from the heavy phase outlet 11, and the light phase materials are axially reversely moved along the axial direction to be discharged from the light phase outlet 12 when the spiral conveying shaft 2 rotates relative to the rotary drum 1. Further, the light phase outlet 12 is provided with a baffle 13 capable of adjusting the opening of the light phase outlet 12, the proportion of heavy phase substances and light phase substances contained in the materials to be separated is different, the radial distribution condition of the heavy phase substances and the light phase substances is different during centrifugal separation, that is, the radial boundary position of the heavy phase substances and the light phase substances is different, the requirements of different materials can be flexibly met by adjusting the baffle 13, the opening of the light phase outlet 12 is adjusted to adapt to the radial boundary position of the heavy phase substances and the light phase substances, the heavy phase substances and the light phase substances can be accurately and effectively discharged from the corresponding outlets, the discharge condition of the heavy phase substances from the light phase outlet and the discharge condition of the light phase substances from the heavy phase outlet are avoided, and the separation discharging effect is ensured.
Further, as shown in fig. 1 and 3, the centrifugal separation device further comprises a shell 6 covered outside the rotary drum 1, the shell 6 is fixedly connected to the frame 5, the shell 6 is provided with a first discharge outlet 63 corresponding to the heavy phase outlet 11, and a second discharge outlet 64 corresponding to the light phase outlet 12, when centrifugal separation is performed, the rotary drum 1 rotates at a high speed, so that materials discharged from the heavy phase outlet and the light phase outlet are thrown out at a high speed, and the shell 6 can play a role in collecting and converging, so that separated heavy phase materials and light phase materials can be discharged more intensively and orderly. The casing 6 is formed by combining an upper casing 61 and a lower casing 62 which are detachably connected in a split mode, and the centrifugal separation device in the embodiment is specifically of a horizontal structure, namely, the axial direction of the rotary drum 1 and the axial direction of the spiral conveying shaft 2 are along the transverse direction, and the upper casing 61 is hinged to the frame 5 to form a flip structure and is fixed through a hasp assembly, so that maintenance and cleaning are facilitated.
In this embodiment, the drum 1 needs to be driven by the power mechanism 3 to perform variable speed operation, in order to facilitate accurate control, the power mechanism 3 preferably adopts a variable frequency motor, as shown in fig. 4 and 5, and the centrifugal separation device further includes a control system, where the control system is used to control the power mechanism 3 to drive the drum 1 to perform variable speed operation, so that the drum 1 and the spiral conveying shaft 2 rotate at a high speed while still can maintain a differential speed, thereby performing centrifugal separation efficiently and stably, and enabling separated heavy phase substances and light phase substances to be orderly separated and discharged from corresponding outlets, so as to ensure continuity of centrifugal separation. Further, the centrifugal separation device is further provided with a first detection component 71 and a second detection component 72, the first detection component 71 detects the rotating speed of the rotary drum 1, the second detection component 72 detects the rotating speed of the spiral conveying shaft 2, information detected by the first detection component 71 and the second detection component 72 is sent to the control system, and the control system further precisely controls the action of the power mechanism 3 according to the detected real-time rotating speeds of the rotary drum 1 and the spiral conveying shaft 2, so that the rotary drum 1 and the spiral conveying shaft 2 can rotate at high speed and simultaneously can keep differential speed.
The first detection component 71 and the second detection component 72 may be of various types, including mechanical, electromagnetic, photoelectric, laser, etc., and the first detection component 71 and the second detection component 72 in this embodiment each include a rotation speed sensor 711, a synchronous belt 712, and a gear 713, the gear 713 of the first detection component 71 is connected to the drum 1, the gear 713 of the second detection component 72 is connected to the screw conveying shaft 2, and the gear 713 is in transmission connection with the rotation speed sensor 711 through the synchronous belt 712.
The working method of the centrifugal separation device comprises the following steps:
s1, driving the rotary drum 1 to accelerate by the power mechanism 3, and synchronously accelerating the spiral conveying shaft 2 along with the rotary drum 1 under the action of the unidirectional bearing 4, namely, keeping the same rotating speed of the spiral conveying shaft 2 and the rotary drum 1 to synchronously rotate, wherein the spiral conveying shaft 2 is in a standing state relative to the rotary drum 1;
s2, when the rotating speed of the rotary drum 1 reaches a preset rotating speed, the rotary drum 1 is driven by the power mechanism 3 to be decelerated, the spiral conveying shaft 2 and the rotary drum 1 are only assembled and connected through the rotary bearing 41 and the one-way bearing 4, the spiral conveying shaft 2 is not synchronously decelerated along with the rotary drum 1 due to the one-way bearing 4, the spiral conveying shaft 2 maintains the rotating speed of the spiral conveying shaft 2 due to inertia, the spiral conveying shaft 2 is slowly decelerated only with small deceleration under the action of friction resistance and material resistance, so that the spiral conveying shaft 2 operates at a rotating speed higher than the rotating speed of the rotary drum 1 under the action of inertia, a rotating speed difference occurs between the rotary drum 1 and the spiral conveying shaft 2, namely, the spiral conveying shaft 2 rotates relative to the rotary drum 1 in the rotary drum 1, the materials in a separation chamber are axially pushed by the spiral conveying shaft 2, the centrifugal action generated by the high-speed rotation in the separation chamber is already radially separated into heavy phase materials and light phase materials, the spiral conveying shaft 2 moves along the axial direction to discharge, and the light phase materials move along the axial direction reversely to discharge, and the light phase materials are kept at a state higher than the rotating speed of the rotary drum 1, and the rotating speed of the spiral conveying shaft 2 is discharged at the rotating speed higher than the rotary drum 1;
specifically, when the rotation speed of the drum 1 reaches the preset rotation speed, the power mechanism 3 drives the rotation speed of the drum 1 to reduce by a preset differential value, at this time, the rotation speed difference between the drum 1 and the screw conveying shaft 2 occurs due to the inertia effect, so that the screw conveying shaft 2 generates an axial pushing effect to realize discharging, the screw conveying shaft 2 slowly reduces speed due to the resistance effect, the stability and continuity of discharging of heavy phase substances and light substances are maintained, during discharging, along with the reduction of the rotation speed of the screw conveying shaft 2, the power mechanism 3 reduces the rotation speed of the drum 1 to maintain a state that the rotation speed of the screw conveying shaft 2 is greater than the rotation speed of the drum 1, more preferably, the rotation speed difference between the drum 1 and the screw conveying shaft 2 is kept at the preset differential value in the discharging process, so that the screw conveying shaft 2 rotates relative to the drum 1 in a stable state, and the axial pushing action of the screw conveying shaft 2 on the materials is kept constant during discharging, that is kept uniform, that the heavy phase substances and light phase substances are discharged from the drum are kept uniform, the condition that the heavy phase substances and the light phase substances are discharged from the drum are kept uniform and the heavy phase substances are kept to have a uniform and the centrifugal substances and the high-phase substances are kept as frequent as possible and the stability is avoided;
s3, the rotating speed of the spiral conveying shaft 2 is gradually reduced, when the rotating speed of the spiral conveying shaft 2 is reduced to a preset rotating speed II, the step S1 is executed, the preset rotating speed II is smaller than the preset rotating speed I, namely, when the rotating speed of the spiral conveying shaft 2 is reduced to the preset rotating speed II, the power mechanism 3 drives the rotary drum 1 again to accelerate, the rotary drum 1 drives the spiral conveying shaft 2 to accelerate synchronously along with the rotary drum 1 through the one-way bearing 4 again, so that the spiral conveying shaft 2 and the rotary drum 1 are maintained in a high rotating speed state, and therefore sufficient centrifugal force is ensured to enable materials to be effectively centrifugally separated in a separation chamber, and then separated heavy-phase materials and light-phase materials are discharged from the rotary drum 1 in a state that the rotating speed of the spiral conveying shaft 2 is larger than the rotating speed of the rotary drum 1, so that discharging is achieved.
The preset rotating speed I and the preset rotating speed II are set according to the property of the materials to be separated, the preset differential value is set according to the required discharging speed, for example, the preset rotating speed I is 4200 revolutions/min, the preset rotating speed II is 4000 revolutions/min, and the preset differential value is 50 revolutions/min. The working method of the centrifugal separation device is as follows:
s1, driving a rotary drum 1 to forward speed up by a power mechanism 3, and synchronously forward speed up the spiral conveying shaft 2 along with the rotary drum 1 under the action of a one-way bearing 4;
s2, when the rotating speed of the rotary drum 1 reaches 4200 r/min, the rotating speed of the rotary drum 1 is reduced by 50 r/min by the power mechanism 3, namely, when the rotating speed of the rotary drum 1 is 4150 r/min, the spiral conveying shaft 2 runs at a rotating speed which is larger than the rotating speed of the rotary drum 1 due to the action of inertia, meanwhile, the spiral conveying shaft 2 slowly reduces the rotating speed due to the action of resistance, namely, the spiral conveying shaft 2 starts to slowly reduce the rotating speed, the state that the rotating speed of the spiral conveying shaft 2 is 4200 r/min is maintained, discharging is carried out, further, during discharging, the rotating speed of the rotary drum 1 is reduced by the power mechanism 3 along with the rotating speed reduction of the spiral conveying shaft 2, and the rotating speed difference between the rotary drum 1 and the spiral conveying shaft 2 is kept stable at 50 r/min, namely, when the spiral conveying shaft 2 reduces the rotating speed of the rotary drum 1 to 4150 r/min, the rotating speed of the power mechanism 3 reduces the rotating speed of the rotary drum 1 to 4100 r/min, and when the spiral conveying shaft 2 reduces the rotating speed to 4100 r/min, the rotating speed of the rotary drum 1 is reduced to 40 r/min;
and S3, when the rotating speed of the spiral conveying shaft 2 is reduced to 4000 revolutions per minute (at the moment, the rotating speed of the rotary drum 1 is 3950 revolutions per minute), returning to the step S1, and driving the rotary drum 1 to forward speed up again by the power mechanism 3 so as to forward speed up the spiral conveying shaft 2.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that the above-mentioned preferred embodiment should not be construed as limiting the invention, and the scope of the invention should be defined by the appended claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.
Claims (10)
1. The utility model provides a centrifugal separation device, its characterized in that includes rotary drum (1) and screw conveying axle (2), screw conveying axle (2) rotate and connect inside rotary drum (1), be provided with one-way bearing (4) between rotary drum (1) and screw conveying axle (2), rotary drum (1) are connected with power unit (3) transmission, rotary drum (1) pass through one-way bearing (4) drive screw conveying axle (2) rotate.
2. Centrifugal separation device according to claim 1, wherein the drum (1) and the screw conveyor shaft (2) are rotatably connected at both axial ends by means of a rotational bearing (41), respectively, and wherein the drum (1) and the screw conveyor shaft (2) are provided with unidirectional bearings (4) at both axial ends, respectively.
3. A centrifugal separator device according to claim 1, further comprising a control system controlling the power mechanism (3) to drive the drum (1) in a variable speed.
4. A centrifugal separator according to claim 3, wherein a first detecting element (71) and a second detecting element (72) are provided, the first detecting element (71) detecting the rotational speed of the drum (1), the second detecting element (72) detecting the rotational speed of the screw conveyor shaft (2), and the information detected by the first detecting element (71) and the second detecting element (72) being sent to the control system.
5. The centrifugal separator according to claim 4, wherein the first detection assembly (71) and the second detection assembly (72) each comprise a rotation speed sensor (711), a synchronous belt (712) and a gear (713), the gear (713) of the first detection assembly (71) is connected to the drum (1), the gear (713) of the second detection assembly (72) is connected to the screw conveying shaft (2), and the gear (713) is in driving connection with the rotation speed sensor (711) through the synchronous belt (712).
6. Centrifugal separation device according to claim 1, characterized in that one end of the drum (1) is provided with a heavy phase outlet (11) and the other end is provided with a light phase outlet (12), the rotating shaft of the screw conveying shaft (2) is provided with a hollow part, one end of the rotating shaft is provided with a feed inlet (21) communicated with the hollow part, and the middle part of the rotating shaft is provided with a discharge outlet (23) communicated with the hollow part.
7. A centrifugal separator according to claim 6, wherein the light phase outlet (12) is provided with a baffle (13) for adjusting the opening of the light phase outlet (12).
8. A method of operating a centrifugal separation device according to any one of claims 1 to 7, characterized in that the steps comprise:
s1, the power mechanism (3) drives the rotary drum (1) to accelerate, and the spiral conveying shaft (2) synchronously accelerates along with the rotary drum (1) under the action of the unidirectional bearing (4);
s2, when the rotating speed of the rotary drum (1) reaches a preset rotating speed, the power mechanism (3) drives the rotary drum (1) to reduce speed, and the spiral conveying shaft (2) is kept to discharge in a state that the rotating speed is greater than the rotating speed of the rotary drum (1);
and S3, executing the step S1 when the rotating speed of the spiral conveying shaft (2) is reduced to a preset rotating speed II, wherein the preset rotating speed II is smaller than the preset rotating speed I.
9. Method according to claim 8, characterized in that in step S2, the power means (3) decreases the rotation speed of the drum (1) with the rotation speed of the screw conveyor shaft (2) during discharge.
10. Method according to claim 9, characterized in that in step S2, the difference in rotational speed between the drum (1) and the screw conveyor shaft (2) is kept stable at a preset differential value during the discharge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311553540.8A CN117563789A (en) | 2023-11-20 | 2023-11-20 | Centrifugal separation device and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311553540.8A CN117563789A (en) | 2023-11-20 | 2023-11-20 | Centrifugal separation device and working method thereof |
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| CN117563789A true CN117563789A (en) | 2024-02-20 |
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| CN202311553540.8A Pending CN117563789A (en) | 2023-11-20 | 2023-11-20 | Centrifugal separation device and working method thereof |
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