SE502118C2 - Liquid agitator, which comprises an electric motor and a propeller and is intended to operate immersed in the working medium - Google Patents

Liquid agitator, which comprises an electric motor and a propeller and is intended to operate immersed in the working medium

Info

Publication number
SE502118C2
SE502118C2 SE9402194A SE9402194A SE502118C2 SE 502118 C2 SE502118 C2 SE 502118C2 SE 9402194 A SE9402194 A SE 9402194A SE 9402194 A SE9402194 A SE 9402194A SE 502118 C2 SE502118 C2 SE 502118C2
Authority
SE
Sweden
Prior art keywords
propeller
electric motor
intended
working medium
liquid agitator
Prior art date
Application number
SE9402194A
Other languages
Swedish (sv)
Other versions
SE9402194L (en
SE9402194D0 (en
Inventor
Hjalmar Fries
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 SE9402194A priority Critical patent/SE502118C2/en
Publication of SE9402194D0 publication Critical patent/SE9402194D0/en
Priority to AU20163/95A priority patent/AU682589B2/en
Priority to EP95850101A priority patent/EP0688599B1/en
Priority to DE69503981T priority patent/DE69503981T2/en
Priority to JP7152899A priority patent/JPH0838874A/en
Priority to CA002152293A priority patent/CA2152293A1/en
Publication of SE9402194L publication Critical patent/SE9402194L/en
Publication of SE502118C2 publication Critical patent/SE502118C2/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/25—Mixers with both stirrer and drive unit submerged in the material being mixed

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Accessories For Mixers (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention concerns a cooling device for the electric motor in a submersible mixer. In order to increase the media exchange at the mantle surface of said motor (2) , the jet ring (4, 5) surrounding the propeller (3) is extended in such a way that the flow created by the propeller is partly forced to pass through the slot between the motor (2) and the ring (5). <IMAGE>

Description

502 118 2 Föreliggande uppfinning avser en anordning för att lösa ovannämnda problem. Uppfinningen beskrivs närmare nedan under hänvisning till bifogade figurer. The present invention relates to a device for solving the above-mentioned problems. The invention is described in more detail below with reference to the accompanying figures.

Fig 1 visar en omrörare försedd med en kylanordning enligt uppfin- ningen och fig 2 och 3 strömningsförlopp vid omrörare utan respektive med kylanordning enligt uppfinningen.Fig. 1 shows a stirrer provided with a cooling device according to the invention and Figs. 2 and 3 show flow processes with stirrers without or with a cooling device according to the invention.

I figurerna betecknar 1 en omrörare med drivenhet, elmotor 2 och propeller 3. 4 betecknar en strålring och 5 en förlängning av denna.In the figures, 1 denotes a stirrer with drive unit, electric motor 2 and propeller 3. 4 denotes a jet ring and 5 an extension thereof.

Med hänvisning till fig 2 diskuteras nu de förhållanden som kan uppstå vid omrörning av Binghamska vätskor. Omröraren skapar här en strömning symboliserad av pilarna i det ljusa partiet figuren. Om- rådet närmast elmotorn inkluderas emellertid ej i denna strömning, vilket kan medföra otillräckligt värmeutbyte mellan elmotorns hölje och omgivningen.With reference to Fig. 2, the conditions that can occur when stirring Bingham fluids are now discussed. The stirrer here creates a flow symbolized by the arrows in the bright part of the figure. However, the area closest to the electric motor is not included in this flow, which can lead to insufficient heat exchange between the electric motor housing and the surroundings.

Av fig 3 framgår den förbättring av strömningen, eller den utökning av området där strömning sker, som åstadkoms med hjälp av uppfin- ningen. Propellern skapar ett undertryck vid sin inloppssida, innan- för strålringen, vilket innebär att kritisk skjuvspänning överskrids och strömning kommer att ske genom stràlringen förbi elmotorns hölje, som därigenom kommer att få en effektiv kylning.Fig. 3 shows the improvement of the flow, or the expansion of the area where flow takes place, which is achieved with the aid of the invention. The propeller creates a negative pressure at its inlet side, inside the radiating ring, which means that critical shear voltage is exceeded and flow will take place through the radiating ring past the housing of the electric motor, which will thereby have an efficient cooling.

I exemplet ovan har en förlängd strålring använts för att åstadkomma en effektiv kylning av elmotorns hölje. Det är emellertid fullt möjligt att, inom ramen för uppfinningstanken, anordna ett eller flera organ runt elmotorn, skilda från strålringen, vilka åstadkommer den erforderliga strömningen.In the example above, an extended radiant ring has been used to provide efficient cooling of the electric motor housing. However, it is quite possible, within the scope of the inventive idea, to arrange one or more means around the electric motor, separate from the jet ring, which provide the required flow.

Claims (2)

1. tå 502 118 Patentk faV 1 Omrörare för vätskor innefattande en elmotor (2) och en propeller (3) förenade medelst en drivaxel, varvid hela omröraren, inklusive elmotor, är avsedd att ar- beta nedsänkti arbetsmediet, k ä n n e t e c k n a d därav, att elmotorn (2) för sin kylning är försedd med en vägg (5) runt hela eller en del av mantelytan som skapar en spalt runt motorns hölje där medieutbytet intensifieras, varvid ström- ningen genom spalten åstadkoms av propellern (3).1. toe 502 118 Patentk faV 1 Agitators for liquids comprising an electric motor (2) and a propeller (3) connected by means of a drive shaft, the whole agitator, including electric motor, being intended to work immersed in the working medium, characterized in that the electric motor (2) for its cooling is provided with a wall (5) around all or part of the jacket surface which creates a gap around the motor housing where the media exchange is intensified, whereby the flow through the gap is provided by the propeller (3). 2. Omrörare enligt krav 1, k ä n n e t e c k n a d därav, att väggen har formen av en förlängning av en stràlring (4,5) som omger propellern (3).2. A stirrer according to claim 1, characterized in that the wall has the shape of an extension of a jet ring (4,5) surrounding the propeller (3).
SE9402194A 1994-06-22 1994-06-22 Liquid agitator, which comprises an electric motor and a propeller and is intended to operate immersed in the working medium SE502118C2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
SE9402194A SE502118C2 (en) 1994-06-22 1994-06-22 Liquid agitator, which comprises an electric motor and a propeller and is intended to operate immersed in the working medium
AU20163/95A AU682589B2 (en) 1994-06-22 1995-05-19 A cooling device for mixers
EP95850101A EP0688599B1 (en) 1994-06-22 1995-06-07 Mixer with a cooling device for Bingham liquids
DE69503981T DE69503981T2 (en) 1994-06-22 1995-06-07 Mixer with cooling device for Bingham liquids
JP7152899A JPH0838874A (en) 1994-06-22 1995-06-20 Cooler for mixer
CA002152293A CA2152293A1 (en) 1994-06-22 1995-06-21 Cooling device for mixers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9402194A SE502118C2 (en) 1994-06-22 1994-06-22 Liquid agitator, which comprises an electric motor and a propeller and is intended to operate immersed in the working medium

Publications (3)

Publication Number Publication Date
SE9402194D0 SE9402194D0 (en) 1994-06-22
SE9402194L SE9402194L (en) 1995-08-21
SE502118C2 true SE502118C2 (en) 1995-08-21

Family

ID=20394478

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9402194A SE502118C2 (en) 1994-06-22 1994-06-22 Liquid agitator, which comprises an electric motor and a propeller and is intended to operate immersed in the working medium

Country Status (6)

Country Link
EP (1) EP0688599B1 (en)
JP (1) JPH0838874A (en)
AU (1) AU682589B2 (en)
CA (1) CA2152293A1 (en)
DE (1) DE69503981T2 (en)
SE (1) SE502118C2 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56161893A (en) * 1980-05-15 1981-12-12 Kurimoto Iron Works Ltd Axial-flow aerator for aeration
JPH0331392Y2 (en) * 1987-04-06 1991-07-03

Also Published As

Publication number Publication date
AU682589B2 (en) 1997-10-09
CA2152293A1 (en) 1995-12-23
JPH0838874A (en) 1996-02-13
SE9402194L (en) 1995-08-21
SE9402194D0 (en) 1994-06-22
AU2016395A (en) 1996-01-04
DE69503981T2 (en) 1998-12-17
EP0688599B1 (en) 1998-08-12
EP0688599A1 (en) 1995-12-27
DE69503981D1 (en) 1998-09-17

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