EP0609197B1 - Schneckenpumpe zum Fördern von Metallschmelzen - Google Patents

Schneckenpumpe zum Fördern von Metallschmelzen Download PDF

Info

Publication number
EP0609197B1
EP0609197B1 EP94890019A EP94890019A EP0609197B1 EP 0609197 B1 EP0609197 B1 EP 0609197B1 EP 94890019 A EP94890019 A EP 94890019A EP 94890019 A EP94890019 A EP 94890019A EP 0609197 B1 EP0609197 B1 EP 0609197B1
Authority
EP
European Patent Office
Prior art keywords
pump
shaft
screw
melt
tube
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.)
Expired - Lifetime
Application number
EP94890019A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0609197A1 (de
Inventor
Erich Ing. Rauch
Josef Ing. Rapp
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.)
Ing Rauch Fertigungstechnik GmbH
Original Assignee
Ing Rauch Fertigungstechnik GmbH
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 Ing Rauch Fertigungstechnik GmbH filed Critical Ing Rauch Fertigungstechnik GmbH
Publication of EP0609197A1 publication Critical patent/EP0609197A1/de
Application granted granted Critical
Publication of EP0609197B1 publication Critical patent/EP0609197B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/043—Shafts
    • F04D29/044—Arrangements for joining or assembling shafts
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • F04D29/0465—Ceramic bearing designs
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • F04D29/0467—Spherical bearings
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/605—Mounting; Assembling; Disassembling specially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D3/00—Axial-flow pumps
    • F04D3/02—Axial-flow pumps of screw type

Definitions

  • the invention relates to a screw pump for conveying metal melts with a pump tube which can be supported by a mounting flange and which forms a lower melt inlet and an upper melt outlet, and a pump shaft which is mounted on a drive motor which can be fitted on the mounting flange and runs inside the pump tube, in the lower end region of the Pump pipe for the pump shaft in the height range between the melt inlet and outlet carrying a screw conveyor a guide is provided.
  • Such a pump is known from DE-C-868 110.
  • a prerequisite for the correct loading of casting machines or the like is the possibility of a functionally reliable and meterable melt conveyance, in particular from containers such as melting or holding furnaces, whereby flow rates usually have to be managed below 100 l / min and continuous use or intermittent operation occurs .
  • flow rates usually have to be managed below 100 l / min and continuous use or intermittent operation occurs .
  • the highest demands are placed on conveying devices for conveying metal melts and so far there has been practically no really satisfactory melt pump.
  • the well-known screw pumps e.g.
  • the invention is therefore based on the object of eliminating these deficiencies and of creating a worm pump of the type described at the outset which, when fully utilizing its advantages specific to the worm, is ideally suited for conveying melt.
  • the invention according to claim 1 solves this problem in that the pump shaft above the melt outlet has a joint with a swivel axis running transversely to the pump axis, preferably a universal joint, and the lower shaft guide forms a holder that offers a swivel movement play to the shaft.
  • the universal joint and shaft guide allow the pump shaft, in addition to its rotary movement, to perform a compensating movement for absorbing temperature-related expansions and deformations, so that the functionally reliable operation of the screw pump is ensured in a rational manner.
  • the universal joint it is of course also possible to use a ball joint or another joint with a swivel axis running transversely to the pump axis, which permits a kind of pendulum movement of the shaft part immersed in the melt.
  • a ball bearing-like slide bearing made of ceramic material or a spherical roller bearing can preferably be used made of chrome-nickel steel, which bearings not only allow a rotational movement and possibly an axial displacement movement, but also a pivoting movement of the shaft in the bearing area.
  • the pump tube is composed of a tube section made of chrome-nickel steel forming the upper melt outlet and a mouthpiece made of ceramic material attached to it below, which has the melt inlet and the shaft guide, since this creates a temperature-resistant, sufficiently firm and resilient pump tube results.
  • melt outlet forms an outlet chamber that widens compared to the cross-section of the pump tube, material accumulations and blockages in the delicate outlet area and thus the risk of functional solidification phenomena are avoided. If the clear cross-section of the pump tube extends above the screw conveyor, the melt flow inside the pump tube after the screw can be calmed and the risk of freezing of the metal can also be eliminated here.
  • a screw pump 1 for conveying molten metal consists of a pump tube 3 which is suspended from a mounting flange 2 and a drive motor 4 mounted on the mounting flange 2 with a pump shaft 5 running through the pump tube 3, the mounting flange 2 being movable via support springs 6 on a ceiling part which is only indicated 7 of a melt container or the like is attached.
  • the pump pipe 3 is composed of a pipe section 3a made of chrome nickel steel and a lower mouthpiece 3b made of ceramic material and forms an upper melt outlet 8 and a lower melt inlet 9.
  • the melt outlet 8 has an outlet chamber 10 which is enlarged compared to the pipe section 3a and the melt inlet 9 results from symmetrically arranged inlet openings 9a in the mouthpiece 3b.
  • the pump shaft 5 carries a screw conveyor 11 above the melt inlet 9 in the area of the mouthpiece 3b, the pipe section 3a expanding after the screw conveyor 11 with respect to the clear cross section compared to the mouthpiece 3b.
  • a universal joint 12 is installed in the pump shaft 5 above the melt outlet 8 and there is a slide bearing 13 made of ceramic material for shaft guidance in the mouthpiece 3b, which is inserted in a bearing bush 14 like a ball joint.
  • the screw pump 1 is particularly suitable for conveying the melt, since on the one hand the materials used with sufficient strength and stability can withstand the extreme temperature conditions in the melt bath and on the other hand due to the shaft bearings which offer compensatory movement play a temperature-related deformation and expansion can be given functionally.
  • the resilient suspension of the entire pump also leads to a corresponding compensation of the bath movement when the melt freezes, which is further compounded by the fact that the widening flow path within the pump tube and the widening outlet chamber at the melt outlet ensure a low-turbulence flow of the melt and so that the risk of the melt freezing and solidifying within the pump is eliminated.
EP94890019A 1993-01-26 1994-01-24 Schneckenpumpe zum Fördern von Metallschmelzen Expired - Lifetime EP0609197B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0011693A AT399205B (de) 1993-01-26 1993-01-26 Schneckenpumpe zum fördern von metallschmelzen
AT116/93 1993-01-26

Publications (2)

Publication Number Publication Date
EP0609197A1 EP0609197A1 (de) 1994-08-03
EP0609197B1 true EP0609197B1 (de) 1996-09-04

Family

ID=3481946

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94890019A Expired - Lifetime EP0609197B1 (de) 1993-01-26 1994-01-24 Schneckenpumpe zum Fördern von Metallschmelzen

Country Status (7)

Country Link
US (1) US5441390A (ja)
EP (1) EP0609197B1 (ja)
JP (1) JPH071109A (ja)
AT (1) AT399205B (ja)
DE (1) DE59400561D1 (ja)
ES (1) ES2092881T3 (ja)
NO (1) NO940255L (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5908066A (en) * 1995-03-24 1999-06-01 Ing. Rauch Fertigungstechnik Gesellschaft M.B.H. Process and device for charging foundry machines
US6306338B1 (en) 1998-09-10 2001-10-23 Ing. Rauch Fertigungstechnik Gesellschaft M.B.H. Melt withdrawal device for melt furnaces for charging casting machines

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5842832A (en) * 1996-12-20 1998-12-01 Thut; Bruno H. Pump for pumping molten metal having cleaning and repair features
AT407232B (de) * 1998-09-10 2001-01-25 Rauch Fertigungstech Gmbh Schmelzenentnahmevorrichtung für schmelzenöfen zur beschickung von giessmaschinen
US7927081B2 (en) * 2006-03-10 2011-04-19 Macneil Wash Systems Limited Pump and motor arrangement
FI120549B (fi) * 2006-10-18 2009-11-30 Boildec Oy Menetelmä ja laite soodakattilan pohjan tyhjentämiseen
FI122836B (fi) * 2008-12-05 2012-07-31 Boildec Oy Menetelmä ja laite soodakattilan pohjan tyhjentämiseen
JP5780608B2 (ja) 2009-06-16 2015-09-16 パイロテック インコーポレイテッド オーバーフロー渦流移送システム
JP5330278B2 (ja) * 2010-01-15 2013-10-30 株式会社ザ・トーカイ マグネシウム給湯ポンプおよびマグネシウム給湯ポンプの制御方法
CN102943761A (zh) * 2012-10-26 2013-02-27 中南大学 一种小流量金属熔体泵
WO2015120009A1 (en) * 2014-02-04 2015-08-13 Pyrotek, Inc. Adjustable flow overflow vortex transfer system
BR112017018374B1 (pt) * 2015-02-27 2022-11-22 Pyrotek, Inc Bomba de transferência de transbordo de material avançado
DE102020124007A1 (de) 2020-09-15 2022-03-17 Lutz Pumpen Gmbh Pumpwerk

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE555861C (de) * 1932-07-29 Aluminium Ind Akt Ges Verfahren zur Entnahme von Aluminium aus Aluminium-Elektrolyse-OEfen
US1656281A (en) * 1926-02-24 1928-01-17 Layne & Bowler Corp Rotary well mechanism
US1883266A (en) * 1927-08-22 1932-10-18 Penberthy Injector Co Portable sump pump
DE868110C (de) * 1942-02-07 1953-02-23 Walter Dipl-Ing Urbahn Pumpe zum Foerdern von fluessigem Metall
DE875302C (de) * 1942-03-25 1953-04-30 Walter Dipl-Ing Urbahn Pumpe zum Foerdern von fluessigem Metall, insbesondere von Zink
US2842208A (en) * 1953-09-14 1958-07-08 Phillips Petroleum Co Spring mounted vertical pump support
US3048384A (en) * 1959-12-08 1962-08-07 Metal Pumping Services Inc Pump for molten metal
US3115096A (en) * 1960-02-03 1963-12-24 Jonkopings Mek Werkstads Ab Pump unit
US3612715A (en) * 1969-11-19 1971-10-12 Worthington Corp Pump for molten metal and other high-temperature corrosive liquids
US3776660A (en) * 1972-02-22 1973-12-04 Nl Industries Inc Pump for molten salts and metals
SU879031A2 (ru) * 1979-09-07 1981-11-07 Восточно-Казахстанское Ремонтно-Строительное Специализированное Управление Треста "Казцветметремонт" Осевой насос дл перекачивани расплавленных металлов
JPS62135695A (ja) * 1985-12-09 1987-06-18 Mitsui Kinzoku Eng Kk 溶融金属ポンプ

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5908066A (en) * 1995-03-24 1999-06-01 Ing. Rauch Fertigungstechnik Gesellschaft M.B.H. Process and device for charging foundry machines
US6306338B1 (en) 1998-09-10 2001-10-23 Ing. Rauch Fertigungstechnik Gesellschaft M.B.H. Melt withdrawal device for melt furnaces for charging casting machines

Also Published As

Publication number Publication date
ES2092881T3 (es) 1996-12-01
EP0609197A1 (de) 1994-08-03
AT399205B (de) 1995-04-25
JPH071109A (ja) 1995-01-06
NO940255L (no) 1994-07-27
US5441390A (en) 1995-08-15
ATA11693A (de) 1994-08-15
DE59400561D1 (de) 1996-10-10
NO940255D0 (no) 1994-01-25

Similar Documents

Publication Publication Date Title
EP0609197B1 (de) Schneckenpumpe zum Fördern von Metallschmelzen
EP0071012B1 (de) Zentrifugensieb
EP1355043B1 (de) Laufschaufel für eine Turbomaschine
CH679748A5 (ja)
EP0040692B1 (de) Drehschiebeverschluss für metallurgische Schmelzegefässe
DE19511943C2 (de) Vorrichtung zum kontinuierlichen Beschichten von Metallband
WO1992012391A1 (de) Drehrohrwärmbehandlungsanlage, insbesondere drehrohrofen, mit indirekter wärmezu- oder -abführung
EP0033309B1 (de) Schutzvorrichtung für einen aus einem metallurgischen Gefäss austretenden Giessstrahl
DE19538530C5 (de) Gefäß für metallurgische Zwecke
DE3903210C1 (ja)
DE1207554B (de) Wahlweise um zwei verschiedene Kippachsen kippbarer rinnenloser Induktions-Tiegelofen
WO2021032354A1 (de) Antriebsvorrichtung für einen stopfenverschluss an einem metallurgischen gefäss
DE4038304C2 (de) Mit elektromagnetischem Hub arbeitende Stranggießeinrichtung
DE2931671A1 (de) Aufhaengung fuer einen kippbaren, metallurgischen behaelter
DE2707726A1 (de) Vorrichtung zum trennen einer mischung aus komponenten, insbesondere schmelzfluessiger metalle, metallverbindungen und/oder metallhaltiger schlacke in einem fliehkraftfeld
DE2315805B2 (de) Betaetigungsvorrichtung fuer einen sperrschieber zum oeffnen und schliessen der bodenausgussoeffnung eines giessgefaesses
DE966454C (de) Halterung fuer Russblaserohre
DE2822139C2 (de) Traglager in Gelenkhebeln einer Stranggießkokillen-Oszillationsvorrichtung
DE2547365C2 (de) Vorrichtung zum Bewegen der Gießwanne einer Schleudergießmaschine
DE628041C (de) Giessrinne zum Herstellen von Schleudergusshohlkoerpern
DE2921280A1 (de) Einrichtung zum stranggiessen von metallen unter elektromagnetischem ruehren
DE3409910A1 (de) Verfahren zum betrieb einer doppelbandstranggiesskokille zum druckgiessen von stahl und mit einer doppelbandstranggiesskokille zusammenwirkende giessduese zur durchfuehrung des verfahrens
DE1807680A1 (de) Runde Brennmaschine
DE3616157A1 (de) Rinnensystem zur zuleitung von fluessigem metall in einen ofen
DE3717220A1 (de) Giessmaschine zum eingiessen von fluessigen metallen in formen

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE CH DE ES FR GB IT LI SE

17P Request for examination filed

Effective date: 19950124

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 19960219

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE CH DE ES FR GB IT LI SE

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: DIPL.-ING. W. STEUDTNER

REF Corresponds to:

Ref document number: 59400561

Country of ref document: DE

Date of ref document: 19961010

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19961017

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2092881

Country of ref document: ES

Kind code of ref document: T3

ITF It: translation for a ep patent filed

Owner name: STUDIO CONS. BREVETTUALE S.R.L.

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19970109

Year of fee payment: 4

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19970130

Year of fee payment: 4

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19970131

Year of fee payment: 4

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980125

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980131

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980131

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980131

BERE Be: lapsed

Owner name: RAUCH FERTIGUNGSTECHNIK G.M.B.H.

Effective date: 19980131

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

EUG Se: european patent has lapsed

Ref document number: 94890019.6

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20040115

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20040119

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20040130

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20040312

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050124

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050124

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050125

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050802

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20050124

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050930

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20050125