WO2013000015A1 - Centrifugeuse vibratoire - Google Patents

Centrifugeuse vibratoire Download PDF

Info

Publication number
WO2013000015A1
WO2013000015A1 PCT/AU2012/000749 AU2012000749W WO2013000015A1 WO 2013000015 A1 WO2013000015 A1 WO 2013000015A1 AU 2012000749 W AU2012000749 W AU 2012000749W WO 2013000015 A1 WO2013000015 A1 WO 2013000015A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
vibratory
assembly
centrifuge
vibratory centrifuge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/AU2012/000749
Other languages
English (en)
Inventor
Mariusz MILEWICZ
Wayne CHATTERJEE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sandvik Rock Processing Australia Pty Ltd
Original Assignee
Schenck Process Australia Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU2011902638A external-priority patent/AU2011902638A0/en
Application filed by Schenck Process Australia Pty Ltd filed Critical Schenck Process Australia Pty Ltd
Priority to CN201280032691.2A priority Critical patent/CN104080542B/zh
Priority to AU2012276274A priority patent/AU2012276274A1/en
Priority to DE112012004649.8T priority patent/DE112012004649T5/de
Publication of WO2013000015A1 publication Critical patent/WO2013000015A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B3/00—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering
    • B04B3/06—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering discharging solid particles by vibrating the bowl
    • 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
    • B04B9/12—Suspending rotary bowls ; Bearings; Packings for bearings

Definitions

  • the present invention relates broadly to a vibratory centrifuge shaft assembly.
  • the invention also relates generally to a vibratory centrifuge.
  • Vibratory centrifuges are constructed from:
  • conical baskets made from wire sieve segments that are rotated to achieve up to 100g of centrifugal acceleration for the purpose of solid/liquid separation to dewater coal, salt, sand and phosphate in mineral processing plants; ii) a solids transport system consisting of some form of mechanical excitation to vibrate the minerals along the basket.
  • the bulk material is fed through a chute onto the basket.
  • the rotation of the basket speeds up the feed material to begin centrifugal dewatering.
  • the rotating parts (the basket and shaft assembly) are vibrated to transport the mineral, such as coal.
  • the effluent water is collected in the main housing and drained away, the dewatered solids vibrated off the basket to a discharge chute.
  • the main housing is mounted on resilient vibration isolators above a base frame fixed to a foundation.
  • a vibratory centrifuge shaft assembly comprising:
  • a shaft rotationally mounted in a shaft housing and adapted at opposing ends to connect to a basket assembly and a drive mechanism, respectively;
  • a preloaded thrust bearing mounted to the shaft and designed to handle axial vibratory loads in the shaft.
  • a vibratory centrifuge comprising:
  • a preloaded thrust bearing mounted to the shaft and designed to handle axial vibratory loads in the shaft.
  • the preloaded thrust bearing is one of a pair of preloaded thrust bearings mounted to the shaft proximate one another and located at or adjacent the drive mechanism. More preferably one only of the preloaded thrust bearings is mounted to the shaft housing and designed to also handle radial loads.
  • the shaft assembly further comprises biasing means mounted intermediate the pair of preloaded thrust bearings to maintain a predetermined constant static preload under the axial vibratory loads.
  • the biasing means includes disc springs mounted between the preloaded thrust bearing and an internal annular flange of the shaft housing. Even more preferably the other of the pair of the preloaded thrust bearings is located on an opposite side of and abuts the internal annular flange at the predetermined constant static preload.
  • the shaft assembly also comprises a radial bearing mounted to the shaft and the shaft housing at or adjacent the basket assembly. More preferably the radial bearing together with said one only of the preloaded thrust bearings handle radial imbalance loads in the shaft.
  • the basket assembly includes a frusto-conical basket connected at its smaller diameter end to a basket mount connected to the shaft. More preferably the basket is fabricated at least in part from a mesh or sieve material.
  • the drive mechanism includes a pulley connected to the shaft and coupled to a drive motor via a continuous belt.
  • Figure 1 is an isometric view of a vibratory centrifuge according to an embodiment of the invention
  • Figure 2 is an isometric sectioned view of the vibratory centrifuge of figure 1 ;
  • Figure 3 is a side sectioned view of the vibratory centrifuge of figures 1 and 2;
  • Figure 4 is an isometric sectioned view of a shaft assembly taken from the vibratory centrifuge of the preceding figures;
  • Figure 5 is a side sectioned view of the vibratory centrifuge shaft assembly of figure 4.
  • Figure 6 is a schematic of the shaft assembly of figures 4 and 5.
  • a vibratory centrifuge 10 comprising a shaft assembly 12 mounted to a basket assembly 14 which is rotated by a drive mechanism depicted generally as 16.
  • the vibratory centrifuge 10 also comprises a chute 18 which is operatively coupled to the basket assembly 14 to provide it with a solid/liquid feed such as coal, salt, sand and phosphate to be dewatered in a mineral processing plant. It should however be understood that the vibratory centrifuge has other applications besides solid/liquid separation.
  • the vibratory centrifuge 10 otherwise comprises a baseframe 20 to which a main housing 22 is connected via support mounts such as 24 (see figure 3) and vibration isolators such as 26 (see figure 1 ).
  • the vibration isolators such as 26 of this embodiment are oriented as inclined mounts to handle high axial vibratory loading together with high rotating imbalance loads.
  • the inclined vibration isolators such as 26 are designed to handle all dynamic loads, both axial/thrust and radial loads, prevalent in vibratory centrifuges of this type.
  • the drive mechanism 16 of this embodiment includes a pulley 28 connected to the shaft assembly 12 and coupled to a drive motor 30 (see figure 1 ) via a continuous belt 32.
  • the basket assembly 14 includes a frusto-conical basket 34 connected at its smaller diameter end to a basket mount 36 connected to the shaft assembly 12.
  • the basket 34 is about its tapered or conical surface fabricated from a mesh or in this example wire sieve segments.
  • the shaft assembly 12 includes a shaft 38 rotationally mounted in a shaft housing 40 and adapted at opposing ends to connect to the basket assembly 14 and the drive mechanism 16, respectively (see figures 2 and 3).
  • the shaft assembly 12 also includes a pair of preloaded thrust bearings 42A and 42B mounted to the shaft 38 and designed to handle axial vibratory loads in the shaft 38.
  • One of the preloaded thrust bearings 42A is mounted to the shaft housing 40 and thus designed to also handle radial loads.
  • the pair of preloaded bearings 42A/B are located on the shaft 38 adjacent its connection to the drive mechanism 16.
  • the shaft assembly 12 also comprises a radial bearing 44 mounted to the shaft 38 and the shaft housing 40 adjacent the basket assembly 14.
  • the preloaded bearing 42A together with the radial bearing 44 handle radial loads in the shaft from rotating imbalance forces generated by uneven distribution of feed material on the basket 34.
  • the shaft assembly 12 further comprises biasing means in the form of disc springs such as 46 mounted between the pair of preloaded bearings 42A/B to maintain a predetermined constant static preload under the axial vibratory loads.
  • the disc springs 46 are mounted between the other of the preloaded thrust bearings 42B and an internal annular flange 48 of the shaft housing 40.
  • the preloaded thrust bearing 42A is located on an opposite side of and abuts the internal annular flange 48 at the predetermined constant static preload.
  • the preloaded bearings 42A/B are a tolerance fit on the shaft 38 and are preloaded before operation by hydraulic pressure in applying a compression on the disc springs 46 inside the shaft assembly 12. This preload is maintained by a combination of a lock nut 50 and the tolerance fit of the preloaded bearings 42A/B on the shaft 38.
  • the preloaded thrust bearing 42B has radial clearance from the shaft housing 40 and thus has no applied radial loads. Therefore, two of the three bearings 42A and 44 handle radial imbalance loads, and two of the three bearings 42A B handle preload and axial/thrust vibration loads.
  • the shaft assembly 12 and associated bearing arrangement of this embodiment maintains a set preload force on the bearings to avoid high cyclic and/or shock loading degrading the condition and service life of the bearings.
  • the disc springs 46 and associated pair of preloaded thrust bearings 42A/B are preloaded to between 100 to 120 kN with axial vibratory loads at around 60 kN.
  • the preloaded bearings 42A/B are effectively balanced either side of the annular flange 48 to handle the vibratory axial loads produced by the solids transport system (not shown).
  • Figure 6 is a schematic illustration of the shaft assembly 12 showing the described arrangement of bearings 42A B and 44, disc springs 46, shaft 38 and shaft housing 40.
  • the expected service life of the bearing assembly is extended; 2.
  • the shaft and more particularly bearing assembly is understood to produce significantly less heat compared to traditional systems which may heat up to and in excess of 90°C;
  • the inclined vibration isolators simplify the baseframe whereas traditional designs having several vertical, horizontal and axial isolators are necessarily quite large and complex to accommodate multiple isolators.

Landscapes

  • Centrifugal Separators (AREA)
  • Support Of The Bearing (AREA)

Abstract

La présente invention concerne de manière générale une centrifugeuse vibratoire (10) comprenant une ligne d'arbre (12) montée à un assemblage de panier (14) qui est mis en rotation par un mécanisme d'entraînement (16). La ligne d'arbre (12) inclut un arbre (38) monté de manière à tourner dans un logement d'arbre (40) et adapté aux extrémités opposées pour être connecté à l'assemblage de panier (14) et au mécanisme d'entraînement (16), respectivement. La ligne d'arbre (12) inclut aussi une paire de paliers de butée préchargés (42A et 42B) montés à l'arbre (38) et conçus pour gérer les charges axiales vibratoires dans l'arbre (38). Un des paliers de butée préchargés (42A) est monté au logement de l'arbre (40) et est donc conçu pour gérer les charges radiales. La ligne d'arbre (12) comprend en outre un système de sollicitation sous la forme de disques à ressort (46) montés entre la paire de paliers préchargés (42A/B) pour maintenir une précharge prédéterminée statique constante sous les charges axiales vibratoires.
PCT/AU2012/000749 2011-06-29 2012-06-28 Centrifugeuse vibratoire Ceased WO2013000015A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201280032691.2A CN104080542B (zh) 2011-06-29 2012-06-28 振荡离心机
AU2012276274A AU2012276274A1 (en) 2011-06-29 2012-06-28 Vibratory centrifuge
DE112012004649.8T DE112012004649T5 (de) 2011-06-29 2012-06-28 Vibrationszentrifuge

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2011902638 2011-06-29
AU2011902638A AU2011902638A0 (en) 2011-06-29 Vibratory Centrifuge

Publications (1)

Publication Number Publication Date
WO2013000015A1 true WO2013000015A1 (fr) 2013-01-03

Family

ID=47423283

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2012/000749 Ceased WO2013000015A1 (fr) 2011-06-29 2012-06-28 Centrifugeuse vibratoire

Country Status (4)

Country Link
CN (1) CN104080542B (fr)
AU (1) AU2012276274A1 (fr)
DE (1) DE112012004649T5 (fr)
WO (1) WO2013000015A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106552721A (zh) * 2017-01-13 2017-04-05 周国亮 离心浮沉干法分选机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB862916A (en) * 1959-02-03 1961-03-15 Siteg Siebtech Gmbh Oscillating centrifuge
US3225934A (en) * 1961-05-13 1965-12-28 Machf Reineveld N V Centrifuge
GB1146883A (en) * 1965-05-04 1969-03-26 Kloeckner Humboldt Deutz Ag A vibratory centrifugal strainer
US20020030024A1 (en) * 1998-06-04 2002-03-14 Leung Wallace Woon Fong Method for separating a liquid-solid slurry
US20100120600A1 (en) * 2008-11-10 2010-05-13 Andritz Separation Inc. Vibrating centrifuge

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1024440B (de) * 1954-01-21 1958-02-13 Siteg Siebtech Gmbh Selbstaustragende Siebzentrifuge
CN100528368C (zh) * 2006-12-05 2009-08-19 上海安亭科学仪器厂 超速冷冻离心机

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB862916A (en) * 1959-02-03 1961-03-15 Siteg Siebtech Gmbh Oscillating centrifuge
US3225934A (en) * 1961-05-13 1965-12-28 Machf Reineveld N V Centrifuge
GB1146883A (en) * 1965-05-04 1969-03-26 Kloeckner Humboldt Deutz Ag A vibratory centrifugal strainer
US20020030024A1 (en) * 1998-06-04 2002-03-14 Leung Wallace Woon Fong Method for separating a liquid-solid slurry
US20100120600A1 (en) * 2008-11-10 2010-05-13 Andritz Separation Inc. Vibrating centrifuge

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106552721A (zh) * 2017-01-13 2017-04-05 周国亮 离心浮沉干法分选机

Also Published As

Publication number Publication date
DE112012004649T5 (de) 2015-03-12
AU2012276274A1 (en) 2014-01-09
CN104080542B (zh) 2016-06-01
CN104080542A (zh) 2014-10-01

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