SE507479C2 - Cooking apparatus for electrically driven mixer in hot liquids - Google Patents

Cooking apparatus for electrically driven mixer in hot liquids

Info

Publication number
SE507479C2
SE507479C2 SE9504104A SE9504104A SE507479C2 SE 507479 C2 SE507479 C2 SE 507479C2 SE 9504104 A SE9504104 A SE 9504104A SE 9504104 A SE9504104 A SE 9504104A SE 507479 C2 SE507479 C2 SE 507479C2
Authority
SE
Sweden
Prior art keywords
cooling
motor
jacket
gap
inlet
Prior art date
Application number
SE9504104A
Other languages
Swedish (sv)
Other versions
SE9504104D0 (en
SE9504104L (en
Inventor
Jan Mickos
Roland Naerholm
Per G L Stjerna
Peter Uvemo
Original Assignee
Flygt Ab Itt
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 Flygt Ab Itt filed Critical Flygt Ab Itt
Priority to SE9504104A priority Critical patent/SE507479C2/en
Publication of SE9504104D0 publication Critical patent/SE9504104D0/en
Priority to AU70426/96A priority patent/AU704494B2/en
Priority to US08/739,390 priority patent/US5684346A/en
Priority to DE69614485T priority patent/DE69614485T2/en
Priority to AT96850184T priority patent/ATE204207T1/en
Priority to EP96850184A priority patent/EP0774293B1/en
Priority to JP30257096A priority patent/JP3631861B2/en
Priority to CA002190440A priority patent/CA2190440C/en
Publication of SE9504104L publication Critical patent/SE9504104L/en
Publication of SE507479C2 publication Critical patent/SE507479C2/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H02K5/132—Submersible electric motors

Abstract

Cooling device for an electric motor (1) intended for driving a propeller mixer for liquids or a rotating pump impeller. Motor (1) is normally surrounded by the treated pumped liquid. Cooling device consists of a cooling jacket that entirely or partly surrounds motor (1). Jacket (5) has inlet (9) and outlet (10) for cooling medium. Jacket (5) concentrically surrounds the mantle surface (4) of motor (1). Jacket (5) has an axially directed cylindrical partition wall (6) that divides the jacket (5) into two concentric gaps (7,8). Inner gap (7) is connected to cooling liquid inlet (9) and has a width of at most 50% of the outer gap (8). Gap (8) is connected to the cooling water outlet (10).

Description

507 479 Den värme som utvecklas i elmotorn 1, såsom tidigare sagts, avledas till omgivningen för att en skadligt hög temperatur ej skall uppkomma i motorns iindningar. 507 479 The heat generated in the electric motor 1, as previously stated, is dissipated to the environment so that a harmful high temperature does not arise in the windings of the motor.

Genom SE 405 533 och US 4516044 är det känt att åstadkomma kylning med hjälp av tillförsel av kylvatten som bringas att cirkulera i kanaler runt motom. Detta fungerar i regel bra om statorn omges av luft med rimlig temperatur. I den här aktuella applikationen där motorn omges av vätska som kan vara mycket varm är en sådan utföringsform ej tillräckligt effektiv. l varje fall om rimliga kylvattenmängder skall användas.From SE 405 533 and US 4516044 it is known to provide cooling by means of a supply of cooling water which is caused to circulate in channels around the engine. This usually works well if the stator is surrounded by air with a reasonable temperature. In this current application where the engine is surrounded by liquid which can be very hot, such an embodiment is not sufficiently efficient. In each case if reasonable amounts of cooling water are to be used.

Enligt uppfinningen anordnas en kylkàpa 5 runt hela eller en del av motorn 1, vilken kåpa har en inre cylindrisk skiljevägg 6 längs större delen av sin axiella utsträckning. Kylvatten tillförs utrymmet 7 innanför skiljevägen, d v s närmast motorns mantelyta 4, och leds bort fràn utrymmet 8 utanför skiljevägen 6, efter att först ha strömmat igenom det inre utrymmet runt statorns mantelyta och sedan det yttre. Enligt uppfinningen är skiljeväggen 6 sä placerad att spalten 7 mellan denna och motorns mantelyta är avsevärt smalare än spalten 8 mellan skiljeväggen 6 och kylkàpans yttervägg 5. Skillnaden i spaltbredd är tvä till fyra gånger, företrädesvis tre gånger. Eftersom samma kylvätskemängd skall passera spalterna 7 och 8, betyder detta att strömningshastigheten blir högre i den inre spalten än i den yttre. Den höga hastigheten i den inre spalten 7 medför en mycket god värmeöverfö- ring från motorns mantelyta 4 till kylmediet. Den lägre hastigheten i den yttre spalten medför ett lägre värmeutbyte, d v s mediet i denna spalt tjänstgör som ett isolerskikt ut mot den varma omgivande vätskan.According to the invention, a cooling cover 5 is arranged around all or a part of the motor 1, which cover has an inner cylindrical partition 6 along the greater part of its axial extent. Cooling water is supplied to the space 7 inside the partition, i.e. closest to the motor surface 4 of the motor, and is diverted from the space 8 outside the partition 6, after first flowing through the inner space around the stator surface and then the outer. According to the invention, the partition wall 6 is placed so that the gap 7 between it and the outer surface of the engine is considerably narrower than the gap 8 between the partition wall 6 and the outer wall 5 of the cooling hood. The difference in gap width is two to four times, preferably three times. Since the same amount of coolant is to pass through the slots 7 and 8, this means that the flow rate will be higher in the inner slot than in the outer one. The high speed in the inner gap 7 results in a very good heat transfer from the engine surface 4 to the coolant. The lower velocity in the outer gap results in a lower heat exchange, i.e. the medium in this gap serves as an insulating layer towards the warm surrounding liquid.

En ökad tillförd vätskemängd per tidsenhet medför naturligtvis ett ökat värmeutbyte. Det väsentliga enligt uppfinningen är dock att de tvà spalterna har olika bredd, vilket gör att hastigheten i den inre alltid är högre än i den yttre.An increased amount of liquid added per unit time naturally leads to an increased heat exchange. The essential thing according to the invention is, however, that the two gaps have different widths, which means that the speed in the inner is always higher than in the outer.

Med hjälp av uppfinningen har àstadkommits en kylanordning för en elektrisk motor som arbetar nedsänkt i det behandlade mediet och där detta ej är tillräckligt eller lämpligt att utnyttja för kyländamàl. Konstruktionen enligt uppfinningen med den beskrivna spalt- breddsdifferensen medför en god kylning med en begränsad mängd tillfört kylmedium.By means of the invention, a cooling device has been provided for an electric motor which operates immersed in the treated medium and where this is not sufficient or suitable to be used for cooling purposes. The construction according to the invention with the described gap width difference results in a good cooling with a limited amount of supplied cooling medium.

Claims (1)

1. 507 479 Patentkrav Kylanordning för en elektrisk motor avsedd att driva en propelleromrörare för vätskor eller ett roterande pumphjul, vilken motor (1) normalt är helt omgiven av den behandlade, pumpade vätskan, innefattande en kylkåpa (5) som helt eller delvis omger motorn och är försedd med tillopp (9) och utlopp (10) för kylmedium, k ä n n e t e c k n a d därav, att kylkåpan (5), som koncentriskt omger elmotorns mantelyta (4), är försedd med en axiellt riktad cylindrisk mellanvägg (6), som uppdelar kylkåpan i två koncentriska spalter (7) respektive (8), av vilka den inre, till vilken kylvätskeinloppet (9) är anslutet, har en bredd som är högst 50% av den yttre till vilken kylvätskeutloppet (10) är anslutet.A cooling device for an electric motor intended to drive a propeller stirrer for liquids or a rotating impeller, which motor (1) is normally completely surrounded by the treated, pumped liquid, comprising a cooling cap (5) which completely or partially surrounds the motor and is provided with inlet (9) and outlet (10) for cooling medium, characterized in that the cooling cover (5), which concentrically surrounds the mantle surface (4) of the electric motor, is provided with an axially directed cylindrical partition wall (6), which divides the cooling cover in two concentric slots (7) and (8), respectively, of which the inner one, to which the coolant inlet (9) is connected, has a width not more than 50% of the outer one to which the coolant outlet (10) is connected.
SE9504104A 1995-11-17 1995-11-17 Cooking apparatus for electrically driven mixer in hot liquids SE507479C2 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
SE9504104A SE507479C2 (en) 1995-11-17 1995-11-17 Cooking apparatus for electrically driven mixer in hot liquids
AU70426/96A AU704494B2 (en) 1995-11-17 1996-10-25 A cooling device
US08/739,390 US5684346A (en) 1995-11-17 1996-10-29 Cooling device
DE69614485T DE69614485T2 (en) 1995-11-17 1996-11-04 cooler
AT96850184T ATE204207T1 (en) 1995-11-17 1996-11-04 COOLER
EP96850184A EP0774293B1 (en) 1995-11-17 1996-11-04 A cooling device
JP30257096A JP3631861B2 (en) 1995-11-17 1996-11-14 Cooling system
CA002190440A CA2190440C (en) 1995-11-17 1996-11-15 A cooling device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9504104A SE507479C2 (en) 1995-11-17 1995-11-17 Cooking apparatus for electrically driven mixer in hot liquids

Publications (3)

Publication Number Publication Date
SE9504104D0 SE9504104D0 (en) 1995-11-17
SE9504104L SE9504104L (en) 1997-05-18
SE507479C2 true SE507479C2 (en) 1998-06-08

Family

ID=20400262

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9504104A SE507479C2 (en) 1995-11-17 1995-11-17 Cooking apparatus for electrically driven mixer in hot liquids

Country Status (4)

Country Link
AT (1) ATE204207T1 (en)
AU (1) AU704494B2 (en)
DE (1) DE69614485T2 (en)
SE (1) SE507479C2 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4516044A (en) * 1984-05-31 1985-05-07 Cincinnati Milacron Inc. Heat exchange apparatus for electric motor and electric motor equipped therewith
DE4104959A1 (en) * 1991-02-18 1992-08-20 Siemens Ag HEAT EXCHANGER
SE467752B (en) * 1991-09-03 1992-09-07 Flygt Ab Itt DEVICE FOR ASTADCOMMATING BY COOLING A CHEATED CHEATED ELECTRICAL ENGINE

Also Published As

Publication number Publication date
AU7042696A (en) 1997-05-22
ATE204207T1 (en) 2001-09-15
DE69614485T2 (en) 2002-05-29
SE9504104D0 (en) 1995-11-17
DE69614485D1 (en) 2001-09-20
SE9504104L (en) 1997-05-18
AU704494B2 (en) 1999-04-22

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