EP0546458A1 - Sichtrad für Schleuderrad-Windsichter - Google Patents

Sichtrad für Schleuderrad-Windsichter Download PDF

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Publication number
EP0546458A1
EP0546458A1 EP92120687A EP92120687A EP0546458A1 EP 0546458 A1 EP0546458 A1 EP 0546458A1 EP 92120687 A EP92120687 A EP 92120687A EP 92120687 A EP92120687 A EP 92120687A EP 0546458 A1 EP0546458 A1 EP 0546458A1
Authority
EP
European Patent Office
Prior art keywords
wheel
classifying
classifying wheel
blades
hub
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.)
Withdrawn
Application number
EP92120687A
Other languages
German (de)
English (en)
French (fr)
Inventor
Georg Dipl.-Ing. Schumacher (Fh)
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.)
Hosokawa Alpine AG
Original Assignee
Alpine AG
Hosokawa Alpine AG
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
Application filed by Alpine AG, Hosokawa Alpine AG filed Critical Alpine AG
Publication of EP0546458A1 publication Critical patent/EP0546458A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
    • B07B7/08—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
    • B07B7/083—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force generated by rotating vanes, discs, drums, or brushes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
    • F04D29/283—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis rotors of the squirrel-cage type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/289—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps having provision against erosion or for dust-separation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2230/00—Manufacture
    • F05B2230/20—Manufacture essentially without removing material
    • F05B2230/22—Manufacture essentially without removing material by sintering

Definitions

  • the invention relates to a wind classifier with the classifying air flowing through it from the outside inward against the direction of its centrifugal rotation, with ring-shaped blades that run parallel to the axis of rotation and are arranged between a circular disk carrying the classifying wheel hub and an annular cover disk. It relates to a classifying wheel for such an air classifier with blades made of a wear-resistant sintered material.
  • a classifying wheel of the required type has become known, for example, from DE-C 35 08 889.
  • An air classifier is described there, in the classifying wheel of which the blades, which are made entirely of a wear-resistant sintered material, are inserted into the recesses of a circular disk carrying the classifying wheel hub on the one hand and an annular cover plate on the other hand with axial play and are inserted into the recesses from a rubber-elastic, wear-resistant material mutual position are fixed and radially supported against circular disc or cover disc.
  • This air classifier high-purity substances, in which even the slightest contamination, e.g. due to abrasion on well-touched surfaces, which make the product unusable, can be processed without wear or abrasion. Even with heavily abrasive fabrics with a Mohs hardness of 4 or more, wear-free and therefore economical operation of the air classifier is possible.
  • classifying wheels with blades made of sintered material are not quite as stiff in design as those made entirely of steel, so that they operate without changing the design of the seal between classifying wheel and suction pipe for the fine material at only about 80% of the maximum circumferential speed of the classifying wheels made of steel can be.
  • the object of the invention is to avoid these disadvantages.
  • classifying wheel with the features according to claim 1, according to which the classifying wheel bearing the classifying wheel hub, the annular cover plate and the classifying wheel blades arranged therebetween and running parallel to the axis of rotation are produced completely and in one piece from a wear-resistant sintered material.
  • the process measures and devices of sintering technology or powder metallurgy are used for the production of the classifying wheel body.
  • the powdered starting material - ceramic or metallic sintered materials - is shaped together with a binder to form a pressed body, which is converted into the desired final shape by mechanical processing and then sintered.
  • all that is required is a fine machining of the hub bore of the classifying wheel to a finished dimension for a direct seat on the drive shaft, as well as the outer end faces of the circular disk and cover plate of the classifying wheel so that they run exactly perpendicular to its axis of rotation.
  • the molding can be shaped, for example, according to DE-C 469 805, which describes methods and pressing devices by means of which a compact body as complex as the classifying wheel body can be produced with a uniform density.
  • a pump impeller to cut the individual impeller blades together with parts of the cover disks axially delimiting the flow channels as a coherent blade element made of a refractory and wear-resistant material (examples of which are tungsten carbide or aluminum oxide) Shaping machining before sintering. After sintering, the individual blade elements are assembled to form the impeller and this is stretched between two shape-matched metal disks, so that a sandwich-like structure with the necessary strength is produced.
  • the parts made of sintered material are used here only as protection against wear due to the pumped fluid containing a solid. Pure sliding friction occurs here, since the geometry of the blade channels, as with any turbomachine, is designed for flow that is as parallel as possible to the wall.
  • paddlewheel air classifiers of the type considered here, however, completely different flow conditions in the blade channels have to be taken into account.
  • a functionally essential component there is a motor-driven paddle wheel like a pump or a blower, but a blower arranged outside the air classifier creates a flow in the bucket channels of the classifying wheel that is opposite to the flow that occurs when the classifying wheel is operated as Blower wheel would arise, ie the flow in the classifying wheel runs radially inward from its outer circumference, that is to say counter to its direction of rotation. This creates a very strong flow deflection at the blade edges on the wheel circumference, through which only the good particles carried in the classifying air receive a centrifugal acceleration that also determines the classifying process.
  • the sighting process then results from the interaction of the particle centrifugal force and the drag force which the sighting air exerts on the particles.
  • this predominates Towing force, so that they are carried away by the classifying air and discharged as fine material.
  • the centrifugal force predominates, so that they receive a component of motion transversely to the direction of flow of the classifying air, which deflects them outwards and makes them collide with the classifying wheel blades.
  • compact particles are thrown out completely, so that they finally leave the classifier as coarse material. Agglomerates are dissolved in the individual particles and subjected to the screening process again.
  • the blades of the classifying wheel are primarily stressed by impact forces and the wear they cause.
  • an inventive sight wheel is shown in two views and partially in section.
  • the classifying wheel 1, which consists of the circular disk 2 with the hub 3, the cover disk 4 and the blades 5 forming the flow channels 6, is made completely and in one piece from a sintered material.
  • the bore in the hub 3 has a finished size, which allows the sight wheel 1 to be mounted directly onto the drive shaft (not shown).
  • a correspondingly shaped feather key is used for torque transmission, which engages in the groove 7 in the hub 3, which is semicircular in cross section.
  • the radially directed flow channels 6 are formed by surfaces of the blades 5 which run parallel to one another and in the direction of the axis of rotation 8 and which are connected to one another in the transition region to the circular disc 2 or cover disc 4 by an arc surface.
  • the shape of the flow channels 6 can be most easily obtained with the aid of a cylindrical end mill.
  • the enlarged details A and B show the chamfered edges of the blades 5 on the outer circumference of the classifying wheel 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Combined Means For Separation Of Solids (AREA)
EP92120687A 1991-12-10 1992-12-04 Sichtrad für Schleuderrad-Windsichter Withdrawn EP0546458A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4140656 1991-12-10
DE4140656A DE4140656C1 (pt) 1991-12-10 1991-12-10

Publications (1)

Publication Number Publication Date
EP0546458A1 true EP0546458A1 (de) 1993-06-16

Family

ID=6446688

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92120687A Withdrawn EP0546458A1 (de) 1991-12-10 1992-12-04 Sichtrad für Schleuderrad-Windsichter

Country Status (4)

Country Link
US (1) US5377843A (pt)
EP (1) EP0546458A1 (pt)
JP (1) JPH0655140A (pt)
DE (1) DE4140656C1 (pt)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994012290A1 (en) * 1992-12-01 1994-06-09 Sinvent A/S Rotor for mechanical air classifiers
EP0736337A1 (de) * 1995-04-07 1996-10-09 HOSOKAWA ALPINE Aktiengesellschaft Sichtrad für Schleuderrad-Windsichter

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4311242C2 (de) * 1993-04-06 1995-08-31 Daimler Benz Ag Rotor für eine elektrische Maschine
DE4419522B4 (de) * 1994-06-03 2006-06-29 Hosokawa Alpine Ag Sichtrad für Schleuderrad-Windsichter
US6107430A (en) * 1996-03-14 2000-08-22 The Dow Chemical Company Low application temperature hot melt adhesive comprising ethylene α-olefin
ID17196A (id) * 1996-03-14 1997-12-11 Dow Chemical Co Bahan-bahan perekat yang mengandung polimer-polimer olefin
DE19613902C2 (de) * 1996-04-06 1998-08-06 Hosokawa Alpine Ag Windsichter mit steifem Sichterradgrundkörper
AU6759096A (en) * 1996-08-08 1996-11-29 Yalestown Corporation N.V. Grader
DE19743491C2 (de) * 1996-10-04 2003-03-20 Schmidt & Co Gmbh & Co Kg Windsichter mit Sichtrotor und Verfahren zur Trennung von Kornklassen
DE19643043C2 (de) * 1996-10-18 1998-11-05 Hosokawa Alpine Ag Schleuderrad-Windsichter mit radialem Feingutaustrag
DK0836893T3 (da) * 1996-10-18 2003-03-24 Hosokawa Alpine Ag & Co Vertikalakset vindsigte
US5927510A (en) * 1997-02-19 1999-07-27 Xerox Corporation Particle classification apparatus and processes thereof
MXPA00013015A (es) 1998-06-30 2002-11-07 Fuller H B Licensing Financ Composicion adhesiva en caliente que comprende interpolimero de etileno homogeneo y copolimero de bloque.
DE19840344C2 (de) * 1998-09-04 2002-04-04 Hosokawa Alpine Ag & Co Sichtrad für einen Zentrifugalkraft-Windsichter
US6038987A (en) * 1999-01-11 2000-03-21 Pittsburgh Mineral And Environmental Technology, Inc. Method and apparatus for reducing the carbon content of combustion ash and related products
DE19903948C2 (de) * 1999-02-02 2002-07-18 Hosokawa Alpine Ag & Co Zentrifugalkraft-Sichterrad
US6776291B1 (en) 2000-09-27 2004-08-17 Xerox Corporation Article and apparatus for particulate size separation
WO2005028584A1 (en) 2003-08-19 2005-03-31 Dow Global Technologies Inc. Interpolymers suitable for use in hot melt adhesives and processes to prepare same
JP2006061902A (ja) * 2004-07-28 2006-03-09 Ricoh Co Ltd 粉砕装置及び粉砕方法
DE102004053530B4 (de) * 2004-11-05 2008-04-30 Aufbereitungstechnologie Noll Gmbh Sichterrad für eine Vorrichtung zur Trennung staubförmiger, fasriger oder körniger Güter
AU2013364469B2 (en) 2012-12-19 2017-09-21 Delaval Holding Ab A milk conduit, a milk conduit device, a milk-receiving member and a milking member
DE102016015051B4 (de) 2016-12-16 2019-01-31 Hosokawa Alpine Aktiengesellschaft Sichtrad für einen Zentrifugalkraft-Windsichter
DE102018008127B4 (de) 2018-10-13 2022-06-09 Hosokawa Alpine Aktiengesellschaft Blaskopf und Verfahren zur Herstellung einer Mehrschichtschlauchfolie
DE102018009632B4 (de) 2018-12-11 2021-12-09 Hosokawa Alpine Aktiengesellschaft Vorrichtung zum Aufwickeln und Wickelwechsel von bahnförmigem Material und ein Verfahren dafür
CN110090797A (zh) * 2019-04-23 2019-08-06 新德隆特种陶瓷（大连）有限公司 一种一体式氮化硅全陶瓷高精度分级轮
CN114230349B (zh) * 2021-12-28 2023-05-05 北京中材人工晶体研究院有限公司 一种氮化硅陶瓷件及其加工方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2061399A (en) * 1979-10-29 1981-05-13 Rockwell International Corp A composite pump impeller
DE3131442A1 (de) * 1981-08-07 1983-02-24 Mitsubishi Electric Corp Pumpe
WO1990006827A1 (en) * 1988-12-21 1990-06-28 Abb Stal Ab Method for manufacturing rings or discs having a blade or vane rim
DE3508889C1 (de) * 1985-03-13 1992-02-20 Alpine Ag, 8900 Augsburg Windsichter mit verschleissfreiem Sichtrad

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE469805C (de) * 1926-09-09 1928-12-27 Bound Brook Oil Less Bearing C Herstellung von Gegenstaenden aus pulverigen oder bildsamen Stoffen durch Zusammenpressen
DE555228C (de) * 1928-06-16 1932-07-19 Patra Patent Treuhand Verfahren zur Herstellung von Formkoerpern fuer Werkzeuge aus schwer bearbeitbaren Verbindungen schwer schmelzbarer Metalle oder Gemischen solcher Verbindungen mit leicht schmelzbaren Metallen
US2269412A (en) * 1940-07-18 1942-01-06 Sturtevant Mill Co Air separator
BE482847A (pt) * 1947-06-26
US2953307A (en) * 1956-10-15 1960-09-20 Microcylclomat Co Synergistic fluid energy reducing and classifying unit
DE1167634B (de) * 1961-07-12 1964-04-09 Alpine Ag Maschinenfabrik Und Sichter mit Sichtrad
US3384238A (en) * 1966-02-17 1968-05-21 Air Sifters Inc Classifying system
US3498453A (en) * 1967-10-10 1970-03-03 Alpine Ag Fluid flow classifier
US4409097A (en) * 1981-10-16 1983-10-11 Omya Gmbh Improved pivotable centrifugal classifier and method of classifying
DE3303078C1 (de) * 1983-01-29 1984-05-30 Alpine Ag, 8900 Augsburg Windsichter fuer den Feinstbereich
JPH01297182A (ja) * 1988-05-25 1989-11-30 Kurimoto Ltd 気流式遠心分級機
DE3912076A1 (de) * 1989-04-13 1990-10-25 Happle Gmbh & Co Maschf Fliehkraftabscheider
JPH0344825A (ja) * 1989-07-12 1991-02-26 Hitachi Ltd 光学式情報再生装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2061399A (en) * 1979-10-29 1981-05-13 Rockwell International Corp A composite pump impeller
DE3131442A1 (de) * 1981-08-07 1983-02-24 Mitsubishi Electric Corp Pumpe
DE3508889C1 (de) * 1985-03-13 1992-02-20 Alpine Ag, 8900 Augsburg Windsichter mit verschleissfreiem Sichtrad
WO1990006827A1 (en) * 1988-12-21 1990-06-28 Abb Stal Ab Method for manufacturing rings or discs having a blade or vane rim

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 14, no. 80 (C-689)(4023) 15. Februar 1990 & JP-A-01 297 182 ( KURIMOTO LTD. ) 30. November 1989 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994012290A1 (en) * 1992-12-01 1994-06-09 Sinvent A/S Rotor for mechanical air classifiers
US5593043A (en) * 1992-12-01 1997-01-14 Sinvent A/S Rotor for mechanical air classifiers
AU677371B2 (en) * 1992-12-01 1997-04-24 Sinvent As Rotor for mechanical air classifiers
EP0736337A1 (de) * 1995-04-07 1996-10-09 HOSOKAWA ALPINE Aktiengesellschaft Sichtrad für Schleuderrad-Windsichter
CN1054552C (zh) * 1995-04-07 2000-07-19 霍索卡瓦阿尔彼股份公司及两合公司 用于离心轮空气分级器的分级轮

Also Published As

Publication number Publication date
JPH0655140A (ja) 1994-03-01
DE4140656C1 (pt) 1992-09-10
US5377843A (en) 1995-01-03

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