CN112387428A - Spiral pusher of centrifugal machine and horizontal spiral centrifugal machine - Google Patents
Spiral pusher of centrifugal machine and horizontal spiral centrifugal machine Download PDFInfo
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- CN112387428A CN112387428A CN202011402437.XA CN202011402437A CN112387428A CN 112387428 A CN112387428 A CN 112387428A CN 202011402437 A CN202011402437 A CN 202011402437A CN 112387428 A CN112387428 A CN 112387428A
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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
- B04B15/00—Other accessories for centrifuges
- B04B15/06—Other accessories for centrifuges for cleaning bowls, filters, sieves, inserts, or the like
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Abstract
The invention relates to a spiral pusher and a horizontal screw centrifuge of a centrifuge, which comprise a spiral pusher component II, wherein the inner wall of the spiral pusher component II is provided with a plurality of ribs and washing holes, and the outer wall of the spiral pusher component II is provided with a nozzle corresponding to the washing holes; the inner wall of the spiral pusher component II is provided with an annular bulge, and the ribs and the washing liquid outlet are arranged between the annular bulge and the end part of one end of the spiral pusher component II. The spiral pusher is provided with the nozzles, and the spiral pusher is internally provided with the liquid pool and the wear-resistant ribs, so that the cleaning liquid entering the spiral pusher can be sprayed out through the nozzles under the action of centrifugal force to clean solid-phase materials, thereby reducing the residue of impurities on the surfaces of the solid-phase materials, improving the integral purity of the solid-phase materials, and being particularly suitable for preparing chemical raw materials.
Description
Technical Field
The invention relates to the technical field of centrifuges, in particular to a spiral pusher of a centrifuge and a horizontal spiral centrifuge.
Background
The horizontal screw centrifuge is an automatic device for continuous feeding, separation and discharging, which is widely applied to the industries of chemical industry, sewage, medical treatment, food and the like. The working principle of the centrifuge is as follows: the rotary drum and the screw rotate at a high speed in the same direction at a certain differential speed, the materials continuously enter a feeding bin of the screw pusher from a feeding pipe, enter the rotary drum after being accelerated, and the heavier solid-phase substances are deposited on the wall of the rotary drum to form a slag settling layer under the action of centrifugal force. The spiral pusher continuously pushes the deposited solid-phase substances to the conical section of the rotary drum and discharges the solid-phase substances out of the machine through the slag discharge port. The lighter liquid phase forms an inner layer liquid ring, continuously overflows from the rotary drum through an overflow port at the liquid phase end of the rotary drum, and is discharged out of the machine through a liquid discharge port.
The existing centrifuge spiral pusher is not provided with a washing nozzle, cannot be washed in the centrifugation process, and cannot simultaneously meet the requirements of solid-liquid separation and washing.
Disclosure of Invention
The invention provides a spiral pusher of a centrifugal machine and a horizontal screw centrifugal machine for solving the technical problems.
The invention is realized by the following technical scheme:
the spiral pusher of the centrifuge comprises a spiral pusher component II, wherein a plurality of ribs and washing holes are distributed on the inner wall of the spiral pusher component II, and nozzles are arranged on the outer wall of the spiral pusher component II corresponding to the washing holes.
Furthermore, the inner wall of the spiral pusher component II is provided with an annular bulge, and the ribs and the washing liquid outlet are arranged between the annular bulge and the end part of one end of the spiral pusher component II.
Furthermore, a plurality of overflow ports B are arranged on the inner circular surface of the annular bulge, and the overflow ports B penetrate through the outer side wall of the spiral pusher component II.
Furthermore, the spiral pusher of the centrifuge further comprises a spiral pusher component I, one end of the spiral pusher component I is connected with one end of the spiral pusher component II, and the blade pitch of the spiral pusher component I is larger than that of the spiral pusher component II.
Further, a material distribution baffle and a conical feeding baffle are arranged inside the spiral pusher component I, and the conical feeding baffle is positioned between the material distribution baffle and the spiral pusher component II;
a feeding bin is formed between the distributing baffle and the conical feeding baffle, and a plurality of feeding holes are formed in the wall of the feeding bin.
Furthermore, a discharge port is formed in the side wall of one end, close to the spiral pusher component I, of the spiral pusher component II.
Preferably, the ribs are arranged in parallel to the axial direction of the spiral pusher assembly II, and a plurality of ribs are arranged at intervals along the circumferential direction.
The horizontal screw centrifuge comprises a screw pusher and a drum component, wherein the screw pusher is rotatably arranged in the drum component.
Compared with the prior art, the invention has the following beneficial effects:
the spiral pusher is provided with the nozzles, and the spiral pusher is internally provided with the liquid pool and the wear-resistant ribs, so that the cleaning liquid entering the spiral pusher can be sprayed out through the nozzles under the action of centrifugal force to clean solid-phase materials, thereby reducing the residue of impurities on the surfaces of the solid-phase materials, improving the integral purity of the solid-phase materials, and being particularly suitable for preparing chemical raw materials.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention.
FIG. 1 is a cross-sectional view of a screw pusher;
FIG. 2 is a three-dimensional perspective view of the screw pusher;
FIG. 3 is a schematic view of the configuration of the rotating part of the horizontal decanter centrifuge of the present invention;
FIG. 4 is a schematic diagram of the horizontal decanter centrifuge of the present invention;
FIG. 5 is a cross-sectional view of the feed tube;
FIG. 6 is a three-dimensional perspective view of the feed tube;
FIG. 7 is an enlarged view of a portion of FIG. 4 at A;
fig. 8 is a three-dimensional view of the upper housing.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
In order to improve the separation effect, the present embodiment separates the separation and the washing. As shown in fig. 1 and 2, the screw pusher 6 of the centrifuge disclosed by the invention comprises a screw pusher assembly I61 and a screw pusher assembly II62, the outer surfaces of which are both provided with pushing blades, but the pitch of the blades of the screw pusher assembly I61 is greater than that of the blades of the screw pusher assembly II 62. In order to facilitate the installation of the two components, the two components are connected by the spigot in a matching way.
Wherein, the screw pusher component I61 is internally provided with a feeding bin 611 and a feeding hole 612. In order to realize the feeding and distribution of materials. The internal structure of the screw pusher assembly I61 is: a material distribution baffle 613 and a tapered feed baffle 614 are provided, the material distribution baffle 613 is located in the middle of the screw pusher assembly I61, and the tapered feed baffle 614 is located between the material distribution baffle 613 and the screw pusher assembly II 62. A feeding bin 611 is formed between the material distribution baffle 613 and the conical feeding baffle 614, and a plurality of feeding holes 612 are formed in the wall of the feeding bin 611; the cavity between the conical feeding baffle 614 and the spiral pusher component II62 is a water return bin I615, and a plurality of through holes A are formed on the inner wall of the water return bin.
An end flange 626 is arranged at one end of the spiral pusher component II62, which is far away from the spiral pusher component I61, an inner cavity of the spiral pusher component II62 forms a water return bin II624, an annular bulge 621 and wear-resistant ribs 625 are arranged on the inner wall, a plurality of through holes B622 are formed in the inner wall and can be used as washing holes, and the through holes B622 are threaded holes for mounting the nozzles 623; a nozzle 623 is arranged on the outer wall corresponding to the through hole B622; the nozzles 623 are arranged in a helical pattern to ensure that material is washed everywhere in the screen drum 53.
A plurality of wear-resistant ribs 625 are arranged on the cavity wall of the water return bin II624 along the circumferential direction, and the wear-resistant ribs 625 are parallel to the axis of the spiral pusher component II 62. The inner wall of the tail end of the spiral pusher component II62 close to one end of the spiral pusher component I61 is provided with a primary discharge port 63, the screen drum 53 is provided with a secondary discharge port 54, and the secondary discharge port 54 is provided with a slag discharging sleeve.
The liquid pool depth of the water returning bin II624 is determined by the thickness of the annular protrusion 621, a plurality of overflow ports B6211 are arranged on the inner circular surface of the annular protrusion 621, and the overflow ports B penetrate through the outer side wall of the spiral pusher component II202 to ensure the liquid pool depth.
The water returning bin I615 is provided with a plurality of through holes A, and the water returning bin II624 is provided with a plurality of overflow ports B6211, which has the following effects: when the device normally operates, the feeding amount is too large, and a small part of suspension overflowing from the feeding bin 611 can flow out of the water returning bin I615 and the water returning bin II624 in sequence; secondly, when the machine is shut down, the liquid ring in the straight-section rotary drum 51 is disintegrated, so that suspension cannot be discharged from the liquid-phase end overflow port A71 in time, and at the moment, the suspension can flow out of the water return bin I615 and the water return bin II624 in sequence; the water return bin I615 and the water return bin II624 can drain the flow direction of water, so that the water cannot flow to each bearing inside, and the internal bearing is damaged. As shown in FIGS. 3 and 4, the horizontal decanter centrifuge disclosed by the invention comprises a machine base 4, a rotary drum component 5, a screw pusher 6, a feeding pipe 1, a housing 10 and a driving mechanism. The driving mechanism in this embodiment comprises a first motor 8 for driving the drum member 5 in rotation and a second motor for driving the auger 6. The rotary drum part 5 is arranged in the housing 10, the spiral pusher 6 is rotatably arranged in the rotary drum part 5, one end of the rotary drum part 5 is connected with the solid-phase end part 3, and the other end of the rotary drum part is connected with the liquid-phase end part 7. First motor 8 and second motor 9 first motor 8 is disposed outside liquid phase end member 7.
The housing 10 is divided into an upper housing and a lower housing. Four discharge ports are formed in the lower side of the lower cover shell, flanges are arranged at the discharge ports, and the four discharge ports are a primary dehydration liquid outlet 1001, a secondary dehydration liquid outlet 1002, a washing liquid discharge port 1003 and a slag outlet 1004 respectively.
The inner wall of the housing 10 is provided with a plurality of annular rib plates 101 at intervals along the axial direction. As shown in fig. 7 and 8, an arc-shaped water guard plate 102 is arranged on a rib plate 101 corresponding to the screen drum 53 in the upper housing, and the water guard plate 102 and the rib plate 101 are arranged at an included angle.
In order to clean the materials staying in the housing and on the outer surface of the rotary drum regularly, the inside of the cavity is clean and tidy. As shown in fig. 4, a washing pipeline 103 is installed at the top of the housing 10, and the washing pipeline 103 is arranged in the upper housing and is arranged along the axial direction of the housing. A plurality of flushing holes 104 are distributed on the lower side of the pipe wall of the flushing pipe 103. Also, as shown in FIG. 3, the solid phase slag hole is also provided with a solid phase washing pipe 105.
When the interior of the centrifuge needs to be washed, washing water is injected through the washing pipe 103, and the washing water is ejected through the washing hole 104, so that the exterior of the rotary drum and the interior of the housing are washed. An included angle between the water retaining guard plate 102 and the rib plate 101 of the upper cover shell can form a guide water tank, so that liquid on the cover shell flows down to two sides along with the guide water tank, and mutual mixing of mother liquor and washing liquor is reduced; the flow of washing liquid to the slag outlet and the mixing with the separated material are avoided as much as possible.
If the cleaning is not performed regularly, materials or crystals can be retained in the cavity, and the crystals attached to the outer part of the rotary drum influence the dynamic balance of the rotary drum; the material of solid phase slag notch is detained too much, can plug up row's sediment passageway, influences equipment ejection of compact effect.
In order to realize different functions, as shown in fig. 3, in the present embodiment, the drum member 5 includes a straight drum 51, a docking flange drum 52 and a screen drum 53, which are sequentially arranged, the screen drum 53 has a larger diameter than the straight drum 51, and a screen 531 is provided in the screen drum 53. In this embodiment, the screen 531 is milled, which is convenient for processing, installation and maintenance, and improves the service life of the screen and the equipment.
The docking flange drum 52 has a conical cavity, and the diameter of the large diameter opening of the conical cavity is the same as the inner diameter of the straight drum 51, and the diameter of the small diameter opening of the conical cavity is smaller than the inner diameter of the screen 531. Wherein, the straight section rotary drum 51 belongs to a primary material distribution settling zone of a centrifuge; the docking flange drum 52 belongs to the extrusion drying zone of the centrifuge; the wall of the screen drum 53 is provided with a plurality of through holes, which together with the screen 531 arranged inside form a centrifuge secondary material dewatering area.
The end of the screen drum 53 remote from the counterflange drum 52 is provided with a solid phase end part 3, and the end of the straight drum 51 remote from the counterflange drum 52 is provided with a liquid phase end part 7. The liquid-phase end part 7 is provided with an overflow port 71A, and the overflow port A71 is used for discharging the first separation liquid. A secondary discharge port 54 is arranged on the screen drum 53, and a slag discharging sleeve is arranged at the secondary discharge port 54.
Both ends of the solid-phase end part 3 and the liquid-phase end part 7 form a journal structure, the outer journal of the liquid-phase end part 7 is installed on the machine base 4 through the bearing and the bearing seat 2, and the outer journal of the solid-phase end part 3 is installed on the machine base 4 through the bearing and the bearing seat 2.
Both the solid end piece 3 and the liquid end piece 7 have a central axial bore. The shaft neck of the liquid-phase end part 7 is also matched and mounted with a differential connecting disc 81 through a flat key and a flat key slot, the side surface of an outer disc of the differential connecting disc 81 is provided with a belt slot, the differential connecting disc 81 is connected with the first motor 8 through a belt, and the differential connecting disc 81 is fixed on a shell of the differential 91. The first motor 8 drives the differential connecting disc 81 and the shell of the differential 91 to rotate together through a belt, and the differential connecting disc 81 drives the straight-section rotary drum 51 to rotate, so that the rotary drum part 5 rotates.
Wherein the screw pusher assembly I61 is located within the straight drum 51 and the docking flange drum 52, and the screw pusher assembly II62 is located within the screen drum 53.
In the present embodiment, the screen drum 53 has 8 rows of holes in total in the axial direction: the row 1-2 is solid-liquid secondary separation, and mother liquor is separated; 3-6 rows are washing zones, and washing liquid is separated and corresponds to the spray nozzles 623 on the spiral pusher component II62, wherein the spray nozzles 623 are 24 in the embodiment; rows 6-8 are the drying section, and the separation washing zone does not separate the thorough washing liquid.
The end flange 626 of the spiral pusher component II62 is sleeved on the shaft neck of the solid phase end part 3 through a bearing; the end of the spiral pusher component I61 far away from the spiral pusher component II62 is sleeved on the shaft neck of the liquid-phase end component 7 through a bearing.
In order to realize the rotation of the spiral pusher 6, an inner spline connecting disc 615 is further arranged in one end of the spiral pusher assembly I61, which is far away from the spiral pusher assembly II62, the inner spline connecting disc 615 is connected with one end of a spline shaft 92, the spline shaft 92 axially penetrates through a central shaft hole of the liquid-phase end part 7, the other end of the spline shaft is connected with a differential 91, an input shaft of the differential 91 passes through a coupler and is driven by a second motor 9, and therefore the rotation of the spiral pusher 6 is realized. The advantages of this structure are: the spiral pusher 6 and the rotary drum part 5 form a certain rotation speed difference, so that the spiral pusher 6 continuously pushes the solid phase object to the solid phase end.
As shown in FIG. 5, a washing path 2 is provided in the feeding pipe 1, a washing liquid inlet 21 is provided on the side wall of the rear end of the feeding pipe 1, and a washing liquid outlet 22 is provided on the side wall of the front end of the feeding pipe 1. The side wall of the rear end of the feeding pipe 1 is connected with a mounting flange 11. One end of the washing channel 2 is connected with the washing liquid inlet, and the other end of the washing channel 2 is connected with the washing liquid outlet 22.
The mounting structure of inlet pipe 1 does: one end of the feed pipe 1 extends into the feed bin 611 through the central axial hole of the solid phase end part 3, and the washing liquid outlet 22 is communicated with the water return bin II624 in the screw pusher assembly II 62.
As shown in fig. 3, a bearing outer ring gland is installed at the bearing of the solid-phase end part 3, an installation spigot of the feed pipe 1 is arranged on the bearing outer ring gland, and an installation flange 11 on the feed pipe 1 is matched with the spigot of the bearing outer ring gland and then is fixedly connected through a bolt. The benefits of this configuration are at least two: on one hand, the feeding pipe 1 is easier to center, so that the feeding pipe can be effectively prevented from being scraped with an internal rotating part, and the feeding pipe is prevented from being damaged; on the other hand, concentricity of the feed pipe 1 is easily ensured, so that the fit clearance of the feed pipe 1 and the solid-phase end part 3 can be reduced, the wall thickness of the journal of the solid-phase end part 3 can be increased, and the bearing capacity of the journal can be increased. In the embodiment, the fit clearance between the feed pipe 1 and the central shaft hole of the solid-phase end part 3 is 2mm-5 mm.
In another embodiment, as shown in fig. 6, a plurality of water-retaining bosses 12 are provided on one side of the outer pipe wall of the feeding pipe 1, and the plurality of water-retaining bosses 12 are sequentially spaced along the axial direction of the pipe wall. The number of the water-blocking bosses 12 is set according to the requirement, including but not limited to setting 4 water-blocking bosses 12.
In this embodiment, the water-blocking boss 12 is a circular ring shape coaxial with the feeding pipe 1, and the water-blocking boss 12 and the feeding pipe 1 are integrally manufactured.
Through setting up manger plate boss 12 at the outer wall of inlet pipe 1, when suspension flowed out from inlet pipe 1 exit end, a small amount of liquid when flowing back to manger plate boss 12 along the outer wall of pipe, manger plate boss 12 can block the liquid of backward flow for backward flow liquid blocks manger plate boss 12 department, and drips downwards under self action of gravity, thereby effectively prevents backward flow liquid backward flow to inlet pipe 1 rear end, can effectively protect the bearing subassembly.
The method of using the horizontal decanter centrifuge of the present invention will be described below with reference to an example.
Example 1
The separation process of the raw material needing to be washed comprises the following steps:
s1, feeding: the material is sprayed on the material distribution baffle 613 from the mouth of the feed pipe 1;
s2, cloth: the material distribution baffle 613 moves at a high speed, and throws the material sprayed on the material distribution baffle out of the feeding bin 611 to the inner wall of the straight-section rotating drum 51 along the radial direction, so as to realize the first material distribution;
s3, first separation: under the action of centrifugal force, solid-phase materials in the straight-section rotary drum 51 are rapidly settled and separated from liquid-phase materials, the spiral pusher component I61 and the straight-section rotary drum 51 rotate in a differential mode, the solid-phase materials are continuously pushed out to the butt flange rotary drum 52, the separated liquid-phase materials are discharged from an overflow port A71 on the liquid-phase end part 7, the first separation of the materials is realized, and the separated liquid is led out through a primary dehydration liquid outlet 1001;
s4, extrusion drying: the butt flange rotary drum 52 is a conical cavity, the space of the material is gradually reduced in the process of being pushed, the material is extruded, and the material is pushed away from the liquid level and dried;
s5, secondary material distribution: as the spiral pusher component I61 and the spiral pusher component II62 are connected in a matching way, the extruded and dried material enters the cavity between the spiral pusher component II62 and the screen drum 53 from the primary discharge port 63 of the spiral pusher component II62, and is crushed and dispersed again under the action of centrifugal force, so that secondary material distribution is realized, and as the diameter of the screen drum is larger than that of the straight drum, the material is thinner at the moment, and the material layer is thinner;
s6, second separation and washing: the residual liquid phase material passes through the gap of the screen 531, is separated from the solid phase material again by centrifugal force and is discharged through the through hole of the screen drum 53, so that the second separation is realized, and the liquid separated for the second time is led out through a secondary dehydration liquid outlet 1002;
s7, washing liquid enters the water returning bin II624 through the washing channel 2, the wear-resistant ribs 625 enable the liquid in the water returning bin II624 to rotate, centrifugal force is generated, the liquid is sprayed out through the through holes B622 and the nozzles 623, so that the material between the spiral pusher assembly II62 and the screen drum 53 is washed, the washing liquid is separated from solid-phase materials again through the centrifugal force, is discharged through the through holes of the screen drum 53 and is led out through a washing liquid outlet 1003;
s8, the screen drum 53 and the auger assembly II62 rotate at a differential speed such that the more dried solid phase material from the second separation is discharged through the secondary discharge port 54 and out the slag outlet 1004.
The above embodiments are provided to further explain the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. Centrifuge's spiral pusher, its characterized in that: the cleaning device comprises a spiral pusher component II, wherein a plurality of ribs and cleaning holes are distributed on the inner wall of the spiral pusher component II, and nozzles are arranged on the outer wall of the spiral pusher component II corresponding to the positions of the cleaning holes.
2. The screw pusher of a centrifuge according to claim 1, wherein: the inner wall of the spiral pusher component II is provided with an annular bulge, and the ribs and the washing liquid outlet are arranged between the annular bulge and the end part of one end of the spiral pusher component II.
3. The screw pusher of a centrifuge according to claim 2, wherein: and a plurality of overflow ports B are arranged on the inner circular surface of the annular bulge, and the overflow ports B penetrate through the outer side wall of the spiral pusher component II.
4. The screw pusher of a centrifuge according to claim 1, wherein: the spiral pusher is characterized by further comprising a spiral pusher component I, one end of the spiral pusher component I is connected with one end of the spiral pusher component II, and the blade pitch of the spiral pusher component I is larger than that of the spiral pusher component II.
5. The screw pusher of a centrifuge according to claim 1, wherein: a material distribution baffle and a conical feeding baffle are arranged in the spiral pusher component I, and the conical feeding baffle is positioned between the material distribution baffle and the spiral pusher component II;
a feeding bin is formed between the distributing baffle and the conical feeding baffle, and a plurality of feeding holes are formed in the wall of the feeding bin.
6. The screw pusher of a centrifuge according to claim 2, wherein: and a discharge port is formed on the side wall of one end of the spiral pusher component II, which is close to the spiral pusher component I.
7. The screw pusher of a centrifuge according to claim 2, wherein: the ribs are arranged in parallel to the axial direction of the spiral pusher component II, and the plurality of ribs are arranged at intervals along the circumferential direction.
8. A decanter centrifuge comprising a screw pusher of the centrifuge of any one of claims 1 to 7, characterized in that: the spiral pusher is rotatably arranged in the drum component.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011402437.XA CN112387428B (en) | 2020-12-04 | 2020-12-04 | Spiral pusher of centrifugal machine and horizontal spiral centrifugal machine |
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| CN202011402437.XA CN112387428B (en) | 2020-12-04 | 2020-12-04 | Spiral pusher of centrifugal machine and horizontal spiral centrifugal machine |
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| CN210449542U (en) * | 2019-08-20 | 2020-05-05 | 成都高分离心机有限公司 | Drum structure of horizontal spiral discharge sedimentation filter centrifuge |
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| EP0083302B1 (en) * | 1981-11-30 | 1986-03-26 | Maschinenfabrik Ad. Schulthess & Co.AG. | Drum for washing machines and/or centrifugal dryers and its use in washing machines or centrifugal dryers |
| US5354255A (en) * | 1992-12-17 | 1994-10-11 | Alfa Laval Separation Inc. | Decanter centrifuge with conveyor capable of high speed and higher flow rates |
| WO2004060567A1 (en) * | 2002-12-26 | 2004-07-22 | Tomoe Engineering Co., Ltd. | Centrifugal separator |
| WO2011134736A1 (en) * | 2010-04-28 | 2011-11-03 | BSH Bosch und Siemens Hausgeräte GmbH | Drum of laundry care device |
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| CN112387428B (en) | 2021-11-16 |
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