CN108187925A - A kind of double tapered angle rotary drum - Google Patents
A kind of double tapered angle rotary drum Download PDFInfo
- Publication number
- CN108187925A CN108187925A CN201711480556.5A CN201711480556A CN108187925A CN 108187925 A CN108187925 A CN 108187925A CN 201711480556 A CN201711480556 A CN 201711480556A CN 108187925 A CN108187925 A CN 108187925A
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- Prior art keywords
- cone
- rotary drum
- angle rotary
- section
- cone section
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- 239000007790 solid phase Substances 0.000 claims abstract description 60
- 239000007788 liquid Substances 0.000 claims abstract description 29
- 239000007787 solid Substances 0.000 claims abstract description 16
- 238000007599 discharging Methods 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 229910052573 porcelain Inorganic materials 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims 2
- 238000001035 drying Methods 0.000 abstract description 7
- 238000000926 separation method Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229960000074 biopharmaceutical Drugs 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B7/00—Elements of centrifuges
- B04B7/08—Rotary bowls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B7/00—Elements of centrifuges
- B04B7/08—Rotary bowls
- B04B7/12—Inserts, e.g. armouring plates
- B04B7/16—Sieves or filters
Landscapes
- Centrifugal Separators (AREA)
Abstract
A kind of double tapered angle rotary drum of the present invention can enhance solid phase drying, be conducive to the discharge of high viscosity solid phase, for separation of solid and liquid.Hollow rotating shaft is rotatably connected on the inside of cone angle rotary drum, cone angle rotary drum and hollow rotating shaft are coaxial, spiral transmitter is fixed on hollow rotating shaft, BD plates are fixed on hollow rotating shaft, space between cone angle rotary drum and hollow rotating shaft is divided into left chamber body and right chamber body, there are spacing, unidirectional filter device between the outer end face of BD plates and the inner surface of cone angle rotary drum to be arranged on BD plates, filter device is located at right chamber body end, and solid-phase outlet is located at left chamber body end；Cone angle rotary drum is respectively to bore section I, cone section II, cone section III, cone section IV and cone section V from left end toward right end, and solid-phase outlet is arranged in cone section I, and filter device is arranged in cone section V；Feed inlet and outlet, feed inlet and outlet are provided on hollow rotating shaft, feed inlet is located at one end of hollow rotating shaft, and outlet is positioned at the inside of cone angle rotary drum and in right chamber body.
Description
Technical field
The present invention relates to a kind of rotary drums, are in particular a kind of double tapered angle rotary drums.
Background technology
Rotary drum is a kind of equipment for separating liquid from solid being industrially commonly used, and the practicality of Patent No. 201420667704.X is new
Type patent discloses a kind of double tapered angle drum structure of decanter centrifuge, it includes rotary drum housing (1), is set in rotary drum housing (1)
There is screw feeder (2), the rotary drum housing (1) includes front end shell (101) and rear piece housing (102), front end shell (101)
Angle is formed between rear piece housing (102), it is characterised in that：The preceding piece housing (101) is bores tubular shell, the back segment
Housing (102) is cone tubular shell, and the cone angle of the rear piece housing (102) is more than the cone angle of preceding piece housing (101).The practicality is new
Type efficiently utilizes the effect of centrifugal force, and resultant force is collectively formed in the effect with spiral pusher, and solid is made to be more advantageous to discharging, can
Effectively to solve the problems, such as that the wet and slippery material of solid is difficult to be detached with existing decanter centrifuge, in bio-pharmaceuticals, food processing row
Industry is with a wide range of applications.But the rotary drum housing in the utility model is only single taper, and high viscosity solid phase is discharged
Improvement is smaller.In addition, the pressure having no idea using liquid, pushes the discharge of high viscosity solid phase.
Invention content
The invention mainly solves the technical problem of providing a kind of double tapered angle rotary drums, can enhance solid phase drying, be conducive to
High viscosity solid phase is discharged.
In order to solve the above technical problems, a kind of double tapered angle rotary drum of the present invention is transferred by cone angle rotary drum, hollow rotating shaft, spiral
Device, BD plates, unidirectional filter device, filter device and solid-phase outlet composition, can enhance solid phase drying, be conducive to high viscosity solid phase
Discharge.
The hollow rotating shaft is rotatably connected on the inside of the cone angle rotary drum, and the cone angle rotary drum and hollow rotating shaft are coaxial,
The spiral transmitter is fixed on the hollow rotating shaft, and the BD plates is annular slabs and are fixed on the hollow rotating shaft, institute
State BD plates and the space between cone angle rotary drum and hollow rotating shaft be divided into left chamber body and right chamber body, the outer end face of the BD plates with it is described
There are spacing, the unidirectional filter device between the inner surface of cone angle rotary drum to be arranged on the BD plates, the filter device and
Solid-phase outlet is separately positioned on the both ends of the cone angle rotary drum, and the filter device is located at right chamber body end, the solid-phase outlet position
In left chamber body end；
The cone angle rotary drum is made of cone section I, cone section II, cone section III, cone section IV and cone section V, and the cone angle rotary drum is from a left side
It is respectively to bore section I, cone section II, cone section III, cone section IV and cone section V to hold toward right end, and the solid-phase outlet is arranged on the cone section I
On, the filter device is arranged in the cone section V；
Feed inlet and outlet, the feed inlet and outlet are provided on the hollow rotating shaft, the feed inlet is located at
One end of the hollow rotating shaft, the outlet is positioned at the inside of the cone angle rotary drum and in right chamber body.
It is advanced optimized as of the invention, the cone section I described in a kind of double tapered angle rotary drum of the present invention is parallel with cone section III
Section, the cone section II, cone section IV and cone section V are tilting section, and the cone section II tilts outward, the left end of the cone section II
For small end, the right end of the cone section II is big end, and the cone section IV tilts and bore inwardly the angle of inclination of section V with section V is bored
More than cone section IV, the cone section IV and the left end for boring section V are big end, and the cone section IV and the right end for boring section V are small end.
As advanced optimizing for the present invention, the outer end face and the cone of the BD plates described in a kind of double tapered angle rotary drum of the present invention
Section III is parallel, and spacing between the two is 2-3mm, and cavity tilts the BD plates to the left.
As advanced optimizing for the present invention, the unidirectional filter device described in a kind of double tapered angle rotary drum of the present invention is porous pottery
Porcelain so that only liquid can flow to right chamber body from left chamber body by unidirectional filter device.
As advanced optimizing for the present invention, the filter device described in a kind of double tapered angle rotary drum of the present invention is porous ceramics,
For discharging the liquid in right chamber body and solid being prevented to discharge.
It is advanced optimized as of the invention, the cone angle rotary drum and hollow rotating shaft described in a kind of double tapered angle rotary drum of the present invention
Junction is provided with sealing device.
A kind of double tapered angle rotary drum of the invention has the beneficial effect that：
1. being provided with multistage cone section on cone angle rotary drum, solid phase drying can be enhanced, be conducive to the discharge of high viscosity solid phase.
2. being provided with BD plates, can have and squeeze solid phase using fluid pressure, solid phase drying can be enhanced, be conducive to high viscosity and consolidate
Mutually discharge.
Description of the drawings
The present invention will be further described in detail with specific implementation method below in conjunction with the accompanying drawings.
Fig. 1 is a kind of structure diagram of double tapered angle rotary drum of the present invention.
In figure：Cone angle rotary drum 1；Bore I 1-1 of section；Bore II 1-2 of section；Bore III 1-3 of section；Bore IV 1-4 of section；Bore V 1-5 of section；It is hollow
Shaft 2；Feed inlet 2-1；Export 2-2；Spiral transmitter 3；BD plates 4；Unidirectional filter device 5；Filter device 6；Solid-phase outlet 7.
Specific embodiment
Illustrate present embodiment with reference to Fig. 1, a kind of double tapered angle rotary drum of the present invention can enhance solid phase drying, favorably
It is discharged in high viscosity solid phase.
The double tapered angle rotary drum is by cone angle rotary drum 1, hollow rotating shaft 2, spiral transmitter 3, BD plates 4, unidirectional filter device 5, mistake
Filter device 6 and solid-phase outlet 7 form, and the hollow rotating shaft 2 is rotatably connected on the inside of the cone angle rotary drum 1, and the cone angle turns
Drum 1 and hollow rotating shaft 2 are coaxial, and the speed that hollow rotating shaft 2 rotates is less than the speed that cone angle rotary drum 1 rotates.The spiral transmitter 3
It is fixed on the hollow rotating shaft 2, is followed by hollow rotating shaft 2 and rotates together.Spiral transmitter 3 is during rotation by solid phase
Constantly pushed toward solid-phase outlet 7.The BD plates 4 is annular slab and are fixed on the hollow rotating shaft 2, and the BD plates 4 are by cone angle
Space between rotary drum 1 and hollow rotating shaft 2 is divided into left chamber body and right chamber body, the outer end face of the BD plates 4 and the cone angle rotary drum 1
Inner surface between there are spacing, this spacing to pass through for solid phase.The unidirectional filter device 5 is arranged on the BD plates 4, institute
It states filter device 6 and solid-phase outlet 7 is separately positioned on the both ends of the cone angle rotary drum 1, the filter device 6 is located at right chamber body
End, the solid-phase outlet 7 are located at left chamber body end；Unidirectional filter device 5 allows the liquid in left chamber body to lead to right chamber body, and
Liquid in right chamber body cannot lead to left chamber body, and solid phase can not pass through from unidirectional filter device 5.Filter device 6 is used for
Discharge excessive liquid in right chamber body, when the liquid in right chamber body is continuously increased will be from filter device 6 more than filter device 6
Middle discharge.Solid-phase outlet 7 is used to discharge solid phase from left chamber body.
The cone angle rotary drum 1 is made of I 1-1 of cone section, II 1-2 of cone section, III 1-3 of cone section, cone IV 1-4 of section and cone V 1-5 of section,
The cone angle rotary drum 1 is respectively to bore I 1-1 of section, II 1-2 of cone section, III 1-3 of cone section, cone IV 1-4 of section and cone section V from left end toward right end
1-5, the solid-phase outlet 7 are arranged on I 1-1 of the cone section, and the filter device 6 is arranged on V 1-5 of the cone section；
Feed inlet 2-1 is provided on the hollow rotating shaft 2 and outlet 2-2, the feed inlet 2-1 are connected with outlet 2-2, institute
One end that feed inlet 2-1 is located at the hollow rotating shaft 2 is stated, the outlet 2-2 is located at the inside of the cone angle rotary drum 1 and positioned at the right side
In cavity.Solid-liquid batch mixing enters 2 inside of hollow rotating shaft from feed inlet 2-1 and enters in right chamber body from outlet 2-2.Due to hollow turn
1 high-speed rotation of axis 2 and cone angle rotary drum, under the influence of centrifugal force, the big solid phase particles of density, which are got rid of, to be attached in cone angle rotary drum 1
Surface forms solid circular layer, and the smaller liquid of density can only form pendular ring layer since centrifugal force is smaller in the inside of solid circular layer.
I 1-1 of cone section and III 1-3 of cone section is parallel-segment, II 1-2 of cone section, cone IV 1-4 of section and V 1- of cone section
5 be tilting section, and cone II 1-2 of section is tilted outward, and the left end of II 1-2 of the cone section is small end, the right side for boring II 1-2 of section
It holds as big end, cone IV 1-4 of section and bores V 1-5 of section and tilt inwardly and bore the angle of inclination of V 1-5 of section and be more than and bore IV 1- of section
4, cone IV 1-4 of section and the left end for boring V 1-5 of section are big end, and cone IV 1-4 of section and the right end for boring V 1-5 of section are small end.
The inclined direction and angle of V 1-5 of cone IV 1-4 of section and cone section moves convenient for solid phase to solid-phase outlet 7.I 1-1 of section is bored convenient for discharge
Solid phase.
The outer end face of the BD plates 4 is parallel with cone section III 1-3, and spacing between the two is 2-3mm, the BD plates
4 cavity inclinations to the left.Spacing between III 1-3 of 4 outer end face of BD plates and cone section leads to left chamber body for solid phase from right chamber body, simultaneously
Solid phase is squeezed, the content liquid in solid phase is reduced.When spacing is excessive, extruding solid phase is not just had, reduces liquid in solid phase
The effect of content when spacing is too small, is unfavorable for solid phase discharge.
The cavity inclination to the left of BD plates 4 leads to left chamber body convenient for solid phase from right chamber body.
The unidirectional filter device 5 is porous ceramics so that only liquid can pass through unidirectional filter device 5 from left chamber body
Right chamber body is flowed to, and liquid cannot flow to left chamber body from right chamber body by unidirectional filter device 5.In addition, solid phase can not pass through
Unidirectional filter device 5.
The filter device 6 is porous ceramics, for discharging the liquid in right chamber body and solid being prevented to discharge.
The junction of the cone angle rotary drum 1 and hollow rotating shaft 2 is provided with sealing device, prevents liquid or solid from cone angle
Rotary drum 1 and the junction of hollow rotating shaft 2 leak out.
The present invention operation principle be：
Cone angle rotary drum 1 turns to identical with hollow rotating shaft 2, and 2 rotating ratio cone angle rotary drum 1 of hollow rotating shaft is low, when solid-liquid batch mixing
Enter 2 inside of hollow rotating shaft from feed inlet 2-1 and enter in right chamber body from outlet 2-2.Due to hollow rotating shaft 2 and cone angle rotary drum 1
High-speed rotation, under the influence of centrifugal force, the big solid phase particles of density are got rid of the inner surface for being attached to cone angle rotary drum 1, form solid ring
Layer, the smaller liquid of density can only form pendular ring layer since centrifugal force is smaller in the inside of solid circular layer.Due to cone angle rotary drum 1 with
The rotating speed of hollow rotating shaft 2 is different, and there are relative motions, i.e. speed discrepancy, i.e. cone angle rotary drum 1 to be deposited with 3 the two of spiral transmitter for the two
In relative motion.Using the relative motion between cone angle rotary drum 1 and spiral transmitter 3, solid circular layer is slowly pushed to solid phase
It is simultaneously discharged from solid-phase outlet 7 outlet 7.
In the process, the liquid in right chamber body can be more and more, and liquid in right chamber body can be controlled by filter device 6
Amount, excessive liquid is discharged from right chamber body.When the amount of liquid in right chamber body increases, liquid can squeeze solid circular layer, add
The solid circular layer of speed enters 7 row of solid-phase outlet along cone V 1-5 of section, IV 1-4 of cone section, III 1-3 of cone section, cone II 1-2 of section and cone I 1-1 of section
Go out.It bores V 1-5 of section, cone IV 1-4 of section and bores the setting in II 1-2 angles of inclination of section and direction and discharged convenient for solid phase.4 outer end face of BD plates
Spacing between cone III 1-3 of section can cause solid phase to lead to left chamber body from right chamber body, while squeeze solid phase, by the liquid in solid phase
Body content reduces, and is discharged convenient for solid phase.The cavity inclination to the left of BD plates 4 also allows for solid phase and leads to left chamber body from right chamber body.
When the liquid in left chamber body is more and more, will be entered in right chamber body by unidirectional filter device 5, so as to squeeze
Solid phase in right chamber body is moved toward solid-phase outlet 7.Additionally due to cone II 1-2 of section is tilted outward, the space of left chamber body from it is right toward
It is left less and less so that Gu the extruding force that circular layer is subject to is increasing, Gu the liquid in circular layer is pressed further by discharging, increase
The drying of solid circular layer is conducive to the discharge of high viscosity solid phase.
Certainly, above description is not limitation of the present invention, and the present invention is also not limited to the example above, the art
The variations, modifications, additions or substitutions that those of ordinary skill is made in the essential scope of the present invention also belong to the guarantor of the present invention
Protect range.
Claims (6)
1. a kind of double tapered angle rotary drum, it is characterised in that：The double tapered angle rotary drum is turned by cone angle rotary drum (1), hollow rotating shaft (2), spiral
Send device (3), BD plates (4), unidirectional filter device (5), filter device (6) and solid-phase outlet (7) composition, the hollow rotating shaft (2)
The inside of the cone angle rotary drum (1) is rotatably connected on, with hollow rotating shaft (2) coaxially, the spiral transfers the cone angle rotary drum (1)
Device (3) is fixed on the hollow rotating shaft (2), and the BD plates (4) is annular slabs and are fixed on the hollow rotating shaft (2), institute
It states BD plates (4) and the space between cone angle rotary drum (1) and hollow rotating shaft (2) is divided into left chamber body and right chamber body, the BD plates (4)
There are spacing, the unidirectional filter device (5) between the inner surface of outer end face and the cone angle rotary drum (1) to be arranged on the BD plates
(4) on, the filter device (6) and solid-phase outlet (7) are separately positioned on the both ends of the cone angle rotary drum (1), the filtering dress
(6) are put positioned at right chamber body end, the solid-phase outlet (7) is positioned at left chamber body end；
The cone angle rotary drum (1) is by cone section I (1-1), cone section II (1-2), cone section III (1-3), cone section IV (1-4) and cone section V
(1-5) is formed, and the cone angle rotary drum (1) is respectively to bore section I (1-1), cone section II (1-2), III (1- of cone section from left end toward right end
3), cone section IV (1-4) and cone section V (1-5), the solid-phase outlet (7) are arranged on the cone section I (1-1), the filtering dress
(6) are put to be arranged on the cone section V (1-5)；
Feed inlet (2-1) and outlet (2-2), the feed inlet (2-1) and outlet (2-2) are provided on the hollow rotating shaft (2)
Connection, the feed inlet (2-1) is positioned at one end of the hollow rotating shaft (2), and the outlet (2-2) is positioned at the cone angle rotary drum
(1) inside and in right chamber body.
2. a kind of double tapered angle rotary drum according to claim 1, it is characterised in that：The cone section I (1-1) and cone section III
(1-3) is parallel-segment, and the cone section II (1-2), cone section IV (1-4) and cone section V (1-5) are tilting section, the cone section II
(1-2) is tilted outward, and the left end of the cone section II (1-2) is small end, and the right end of the cone section II (1-2) is big end, described
Boring section IV (1-4) and cone section V (1-5), the angle of inclination of inclination and cone section V (1-5) is more than cone section IV (1-4) inwardly, described
The left end for boring section IV (1-4) and cone section V (1-5) is big end, and the right end of the cone section IV (1-4) and cone section V (1-5) is small
End.
3. a kind of double tapered angle rotary drum according to claim 1, it is characterised in that：The outer end face of the BD plates (4) and institute
It is parallel to state cone section III (1-3), spacing between the two is 2-3mm, and cavity tilts the BD plates (4) to the left.
4. a kind of double tapered angle rotary drum according to claim 1, it is characterised in that：The unidirectional filter device (5) is more
Hole ceramics so that only liquid can flow to right chamber body from left chamber body by unidirectional filter device (5).
5. a kind of double tapered angle rotary drum according to claim 1, it is characterised in that：The filter device (6) is porous pottery
Porcelain, for discharging the liquid in right chamber body and solid being prevented to discharge.
6. a kind of double tapered angle rotary drum according to claim 1, it is characterised in that：The cone angle rotary drum (1) with hollow turn
The junction of axis (2) is provided with sealing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711480556.5A CN108187925A (en) | 2017-12-29 | 2017-12-29 | A kind of double tapered angle rotary drum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711480556.5A CN108187925A (en) | 2017-12-29 | 2017-12-29 | A kind of double tapered angle rotary drum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108187925A true CN108187925A (en) | 2018-06-22 |
Family
ID=62586732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711480556.5A Pending CN108187925A (en) | 2017-12-29 | 2017-12-29 | A kind of double tapered angle rotary drum |
Country Status (1)
| Country | Link |
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| CN (1) | CN108187925A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110170386A (en) * | 2019-04-22 | 2019-08-27 | 昆明理工大学 | A kind of three taper wear-resisting centrifugal machine rotary drums |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2049199A1 (en) * | 1991-08-14 | 1993-02-15 | Souroku Suzuki | Sedimentation centrifuge |
| CN2306839Y (en) * | 1997-07-25 | 1999-02-10 | 四川联合大学 | Centrifugal force and magnetic force compound action horizontal centrifuge |
| CN201287081Y (en) * | 2008-07-18 | 2009-08-12 | 上海瑞威机电设备有限公司 | Horizontal helix discharging sedimentation centrifuge using helix stock pusher |
| DE102009012532A1 (en) * | 2009-03-11 | 2010-09-16 | Süd-Chemie AG | Decanter-centrifuge, useful for the continuous separation of fine crystalline products from a suspension, comprises a drum with first and second end, a feeding device, a rotatable conveying screw, a discharge chamber and an overflow weir |
| CN204294380U (en) * | 2014-11-10 | 2015-04-29 | 上海市离心机械研究所有限公司 | A kind of double tapered angle drum structure of horizontal screw centrifuge |
| CN104998765A (en) * | 2015-07-02 | 2015-10-28 | 蚌埠市兴利离心机制造有限公司 | Material pushing device of horizontal sedimenting centrifuge |
| CN207970990U (en) * | 2017-12-29 | 2018-10-16 | 海申机电总厂(象山) | A kind of double tapered angle rotary drum |
-
2017
- 2017-12-29 CN CN201711480556.5A patent/CN108187925A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2049199A1 (en) * | 1991-08-14 | 1993-02-15 | Souroku Suzuki | Sedimentation centrifuge |
| CN2306839Y (en) * | 1997-07-25 | 1999-02-10 | 四川联合大学 | Centrifugal force and magnetic force compound action horizontal centrifuge |
| CN201287081Y (en) * | 2008-07-18 | 2009-08-12 | 上海瑞威机电设备有限公司 | Horizontal helix discharging sedimentation centrifuge using helix stock pusher |
| DE102009012532A1 (en) * | 2009-03-11 | 2010-09-16 | Süd-Chemie AG | Decanter-centrifuge, useful for the continuous separation of fine crystalline products from a suspension, comprises a drum with first and second end, a feeding device, a rotatable conveying screw, a discharge chamber and an overflow weir |
| CN204294380U (en) * | 2014-11-10 | 2015-04-29 | 上海市离心机械研究所有限公司 | A kind of double tapered angle drum structure of horizontal screw centrifuge |
| CN104998765A (en) * | 2015-07-02 | 2015-10-28 | 蚌埠市兴利离心机制造有限公司 | Material pushing device of horizontal sedimenting centrifuge |
| CN207970990U (en) * | 2017-12-29 | 2018-10-16 | 海申机电总厂(象山) | A kind of double tapered angle rotary drum |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110170386A (en) * | 2019-04-22 | 2019-08-27 | 昆明理工大学 | A kind of three taper wear-resisting centrifugal machine rotary drums |
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