EP2104570A1 - Endless screw of a centrifuge - Google Patents
Endless screw of a centrifugeInfo
- Publication number
- EP2104570A1 EP2104570A1 EP07856193A EP07856193A EP2104570A1 EP 2104570 A1 EP2104570 A1 EP 2104570A1 EP 07856193 A EP07856193 A EP 07856193A EP 07856193 A EP07856193 A EP 07856193A EP 2104570 A1 EP2104570 A1 EP 2104570A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- screw
- centrifuge
- ceramic
- projections
- recesses
- 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.)
- Granted
Links
- 239000000919 ceramic Substances 0.000 claims abstract description 44
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims description 4
- 238000005495 investment casting Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
- B04B1/2008—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 with an abrasion-resistant conveyor or drum
Definitions
- the invention relates to a centrifuge screw for discharging Zentrifugengut from a centrifuge, wherein at the outer edge of the screw a number of ceramic plates are attached side by side.
- the object of the invention is to improve a centrifuge screw of the type mentioned above so that with a simple production and attachment a secure hold of the ceramic plate is given even at high stress.
- the ceramic platelets have at least two recesses in which on a side surface of the screw edge protruding, molded projections in particular metal pins einre, which are shaped according to the recesses.
- the attachment of the ceramic plate reaches a secure positive connection, with production and attachment are particularly simple.
- a secure orientation of the platelets is possible. Ceramic plates with recesses are easier to produce. Against strong shear requirements a higher breaking strength is achieved. Also, then the platelets can be easily made of other wear-resistant materials.
- the attachment is particularly simple if the projections and the corresponding recesses have a round cross section. Alternatively, they may also be non-circular, in particular rectangular or square in cross section.
- a particularly secure hold and long service life are given when attached to the outer edge of the screw supporting parts in particular as investment castings above the edge protruding, in particular welded, that they widen the screw surface over its edge and recesses or projections in particular form pins for the ceramic tile , which have projections for this purpose, in particular pins or recesses.
- the ceramic platelets may be glued on the support parts, in particular fine cast particles. It is also advantageous in this case if ceramic flakes are fastened to both sides of the supporting parts, in particular the precision cast particles.
- the wear is significantly reduced and increases the service life, when the ceramic platelets at the end facing away from the outer edge of the screw edge form a projecting surface that covers the outside of the screw to protect the weld covering the attachment of the support parts.
- a lesser wear of the support members is achieved when the sides, or side edges of the support members, with which they rest on adjacent support members, are obliquely and / or stepped shaped to lie positively and close to each other.
- Figures 7 and 8 are perspective views of two-sided attached ceramic plate on the centrifuge edge
- Figure 9 is a section through the centrifuge edge
- FIG. 10 shows a ceramic plate
- Figure 12 views of the supporting parts from two sides and in plan view
- FIGS. 13 to 18 correspond to FIGS. 1 to 5, with the difference that the supporting parts have projections and the ceramic platelets have corresponding recesses.
- the helix of a centrifuge screw 1 has an outer edge 2, on which outwardly projecting rectangular, in particular plate-shaped, supporting parts 3, preferably made of investment casting, are welded in particular.
- the centrifuge screw 1 or its helix are preferably made of steel.
- the radially outwardly projecting support members 3 each have two holes as recesses 4, which are arranged radially one above the other.
- On the supporting parts 3 elongated rectangular ceramic plates 5 are fixed, which cover the supporting parts.
- On the ceramic plate 5 projecting pin-shaped projections 6 are arranged radially above each other and formed, their size and dimensions which correspond to the recesses 4, so that the ceramic plates 5 are laterally fastened to the support members 3 positively.
- the support members 3 each form a step 3b in the region of their foot, so that the foot 3a attached to the outer edge 2 has a greater thickness D than the thickness of the adjoining outer portion of the support member 3.
- This step 3b is formed by a step 6a of FIG Platelets 5 covered, wherein the ceramic plates then form the step 6a projecting towards the screw axis protruding surface 7, which protrudes so far to the axis that the screw surface, or the helical surface and thus the outer edge 2 is surmounted to this Optimal protection against wear.
- the platelets 5 carrying support members 3 are on both sides, or side edges 3c, with which they rest on adjacent support members 3, obliquely and / or stepped, so that they overlap there. This prevents gaps between the supporting parts and thus wear.
- the projections 6 and the recesses 4 have a round cross section and are thus cylindrical. Instead, however, the projections and the recesses may have a non-circular, in particular rectangular or square cross-section.
- the width of the ceramic plate 5 corresponds to the width of the support members 3, wherein on each support member is a ceramic plate, the ceramic plates 5, the support members 3 do not project beyond the outside, but complete with them.
- the exemplary embodiment according to FIGS. 7 to 9 differs from the previous ones in that ceramic plates 5 are fastened on both sides of the support parts 3, wherein the support parts 3 each have two recesses 4 on both sides, in particular for use on both sides.
- the ceramic platelets 5 on the supporting parts 3 an additional hold is given by the fact that the ceramic platelets on the supporting parts 3 are glued. Further, instead of two protrusions 6 and two recesses 4, three or more protrusions and recesses may be provided on the platelets and supporting members.
- the protrusions may be provided on the support members 3 and the recesses on the ceramic platelets 5. This is shown in FIGS. 13 to 18.
- the support parts 3 pin-shaped projections 9, which eino positively in correspondingly shaped recesses 8 of the ceramic plate 5.
Landscapes
- Centrifugal Separators (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006058431A DE102006058431A1 (en) | 2006-12-12 | 2006-12-12 | centrifuges screw |
PCT/EP2007/010014 WO2008071290A1 (en) | 2006-12-12 | 2007-11-20 | Endless screw of a centrifuge |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2104570A1 true EP2104570A1 (en) | 2009-09-30 |
EP2104570B1 EP2104570B1 (en) | 2016-05-04 |
Family
ID=39092561
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07856193.3A Active EP2104570B1 (en) | 2006-12-12 | 2007-11-20 | Endless screw of a centrifuge |
Country Status (8)
Country | Link |
---|---|
US (1) | US8523751B2 (en) |
EP (1) | EP2104570B1 (en) |
CN (1) | CN101528354B (en) |
AU (1) | AU2007331784B2 (en) |
DE (1) | DE102006058431A1 (en) |
PL (1) | PL2104570T3 (en) |
WO (1) | WO2008071290A1 (en) |
ZA (1) | ZA200902576B (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7574016B2 (en) * | 2003-06-26 | 2009-08-11 | Fotonation Vision Limited | Digital image processing using face detection information |
DE102006058431A1 (en) * | 2006-12-12 | 2008-06-19 | Siebtechnik Gmbh | centrifuges screw |
US20110281716A1 (en) * | 2010-05-14 | 2011-11-17 | Hurd David E | Wear Tiles for Centrifugal Separators |
US20130210601A1 (en) * | 2010-08-27 | 2013-08-15 | Alfa Laval Corporate Ab | Centrifugal separator |
EP2996812B1 (en) * | 2013-05-15 | 2017-07-05 | Andritz S.A.S. | Protection tiles for scroll conveyor flights |
KR20150104711A (en) * | 2014-03-06 | 2015-09-16 | 엘지전자 주식회사 | Video display device and operating method thereof |
US11065628B2 (en) | 2018-07-09 | 2021-07-20 | Kennametal Inc. | Centrifuge tile assembly |
EP4309797A1 (en) | 2022-07-20 | 2024-01-24 | Alfa Laval Corporate AB | Wear assembly for a helically formed, metal decanter screw conveyor |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3194385A (en) * | 1962-01-15 | 1965-07-13 | Barnese Anthony | Screw-type conveyor with resilient bearing means |
US3485341A (en) * | 1968-03-04 | 1969-12-23 | Kenneth V Lutz | Replaceable shoes for paving augers |
US3762537A (en) * | 1971-09-24 | 1973-10-02 | K Lutz | Replaceable shoe for auger |
US3977515A (en) * | 1974-12-16 | 1976-08-31 | Bird Machine Company, Inc. | Hard-surfaced screw conveyor for centrifuges |
US4328925A (en) * | 1978-02-13 | 1982-05-11 | Pennwalt Corporation | Hard surfacing for a centrifuge conveyor |
GB2098517B (en) * | 1979-05-15 | 1984-01-18 | Pennwalt Corp | Centrifuge with abrasion-resistant conveyor |
SE427901B (en) * | 1979-05-15 | 1983-05-24 | Pennwalt Corp | CENTRIFUG WITH NOTIFICATION |
US4398607A (en) * | 1981-06-08 | 1983-08-16 | Roscoe Brown Corporation | Auger with adjustable wear plate |
DE3140364C2 (en) * | 1981-10-10 | 1983-09-15 | Siebtechnik GmbH, 4330 Mülheim | Conveyor screw, especially for solid bowl centrifuges |
DK148736C (en) * | 1981-12-09 | 1986-03-03 | Alfa Laval Separation As | TRANSPORT SEAL, NAME FOR A DECANTER CENTER |
JPS58119362A (en) * | 1982-01-07 | 1983-07-15 | Kobe Steel Ltd | Structure for protecting leading end of screw flight of horizontal type centrifugal separator |
DE3225207C1 (en) * | 1982-07-06 | 1983-11-03 | Elba Werk Maschinen Gmbh & Co | Mixing unit for concrete mixing machines |
JPS5926813A (en) * | 1982-08-06 | 1984-02-13 | Ebara Corp | Screw conveyer |
DE3242300A1 (en) * | 1982-11-16 | 1984-05-17 | Klöckner-Humboldt-Deutz AG, 5000 Köln | SCREW CENTRIFUGE FOR THE CONTINUOUS SEPARATION OF SOLIDS-LIQUID MIXTURES |
FR2555085B1 (en) * | 1983-11-23 | 1987-06-12 | Guinard Centrifugation | ASSEMBLY CONSISTING OF A METAL PART AND AN ELEMENT RELATED THEREWITH AND ITS MANUFACTURING METHOD |
DE3527548A1 (en) * | 1985-08-01 | 1987-03-12 | Tigra Hartstoff Gmbh | Wear protection for a conveying screw |
DE3533194C1 (en) * | 1985-09-18 | 1987-03-12 | Abel Pumpen Masch | Rotor for a worm centrifuge with a reinforcement consisting of wear plates |
JPS62193663A (en) * | 1986-02-19 | 1987-08-25 | Nishihara Environ Sanit Res Corp | Centrifugal separator |
JP2754055B2 (en) * | 1989-10-11 | 1998-05-20 | 月島機械株式会社 | Screw conveyor blades |
US5429581A (en) * | 1994-03-07 | 1995-07-04 | Dorr-Oliver Incorporated | Wear-resistant tile surfacing for a centrifuge conveyor |
CN2477582Y (en) * | 2001-04-11 | 2002-02-20 | 段辉 | Compound spiral vane |
DE102006058431A1 (en) * | 2006-12-12 | 2008-06-19 | Siebtechnik Gmbh | centrifuges screw |
DE102007046193A1 (en) * | 2007-09-26 | 2009-04-02 | Schrage, Otto, Dipl.-Ing. | Tile for use as e.g. plate, for spiral screw of decanting centrifuge, has carrier with hard coating formed as wear layer and made of material e.g. chromium oxide, aluminum oxide, titanium oxide, chromium carbide or tungsten carbide |
JP2012000551A (en) * | 2010-06-15 | 2012-01-05 | Daiwa Kiko Kk | Screw conveyor |
-
2006
- 2006-12-12 DE DE102006058431A patent/DE102006058431A1/en not_active Ceased
-
2007
- 2007-11-20 CN CN2007800400816A patent/CN101528354B/en active Active
- 2007-11-20 PL PL07856193.3T patent/PL2104570T3/en unknown
- 2007-11-20 WO PCT/EP2007/010014 patent/WO2008071290A1/en active Application Filing
- 2007-11-20 EP EP07856193.3A patent/EP2104570B1/en active Active
- 2007-11-20 AU AU2007331784A patent/AU2007331784B2/en active Active
- 2007-11-20 US US12/518,802 patent/US8523751B2/en active Active
-
2009
- 2009-04-15 ZA ZA200902576A patent/ZA200902576B/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2008071290A1 * |
Also Published As
Publication number | Publication date |
---|---|
US8523751B2 (en) | 2013-09-03 |
AU2007331784B2 (en) | 2011-12-22 |
AU2007331784A1 (en) | 2008-06-19 |
PL2104570T3 (en) | 2016-11-30 |
EP2104570B1 (en) | 2016-05-04 |
US20100016140A1 (en) | 2010-01-21 |
DE102006058431A1 (en) | 2008-06-19 |
CN101528354A (en) | 2009-09-09 |
ZA200902576B (en) | 2010-03-31 |
WO2008071290A1 (en) | 2008-06-19 |
CN101528354B (en) | 2012-10-10 |
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