EP0355082A1 - Strahlring für Mischer - Google Patents

Strahlring für Mischer Download PDF

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Publication number
EP0355082A1
EP0355082A1 EP89850233A EP89850233A EP0355082A1 EP 0355082 A1 EP0355082 A1 EP 0355082A1 EP 89850233 A EP89850233 A EP 89850233A EP 89850233 A EP89850233 A EP 89850233A EP 0355082 A1 EP0355082 A1 EP 0355082A1
Authority
EP
European Patent Office
Prior art keywords
jet ring
ring
inlet
propeller
jet
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
Application number
EP89850233A
Other languages
English (en)
French (fr)
Other versions
EP0355082B1 (de
Inventor
Ingvar Karlsson
Martin Mohammar
Ulf Arbeus
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.)
Xylem Water Solutions AB
Original Assignee
Flygt AB
ITT Flygt AB
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20373081&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0355082(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Flygt AB, ITT Flygt AB filed Critical Flygt AB
Publication of EP0355082A1 publication Critical patent/EP0355082A1/de
Application granted granted Critical
Publication of EP0355082B1 publication Critical patent/EP0355082B1/de
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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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

Definitions

  • the invention concerns a jet ring of the type designed to surround the propeller in a so-called propeller mixer.
  • Mixers of the above mentioned type include a driving unit, an electric motor, a propeller and a driving shaft between those two.
  • the propeller may have two or more blades and can be arranged to be driven with varying speeds, all depending on the use.
  • Mixers are used within various fields for homogenizing and suspension maintenance of liquids for different industrial processes, for liquid manure, for waste water etc.
  • the mixer can be arranged horizontally or vertically or with different angles therebetween. It can also be arranged movable so that the flow from the mixer is brought to sweep over bigger areas or directed towards certain spots within the liquid tank.
  • Another field where a mixer may be used is for creation of currents in a lake to prevent formation of ice.
  • jet ring is cylindrically formed and provided with a somewhat outwards bent collar to make the inflow easier.
  • Such jet rings are shown in the Swe­dish Design Registration No:s 34601 and 39392.
  • a disadvantage with these known designs is that the flow close to the ring may be turbulent depending on a too sharp altera­tion. This causes so-called discontinuance of the boundary layer with an often unstable blocking as a result. The flow through the machine and thus the mixing ability then decrea­ses.
  • Fig 1 shows a side view of a mixer provided with a jet ring according to the invention.
  • Fig 2 shows the jet ring seen in axial direction and
  • Fig 3 shows a diagram over the fluid losses as a function of the ratio between the radius and the diameter of the jet ring.
  • FIG. 1 stands for an electric motor, 2 a driving shaft, 3 a propeller with blades 4, 5 a jet ring with inlet and outlet rims 6 and 7 respectively.
  • a jet ring 5 In order to obtain an effective mixing a jet ring 5 must thus be arranged around the propeller 3. In this way an axially directed jet is obtained which in its turn brings parts of the surrounding fluid mass.
  • the flow towards and into the propel­ler has mainly a direction perpendicular to the axis of rota­tion.
  • the ring is designed in a special way according to the invention.
  • the conventional, mainly cylindric ring is replaced by a funnel shaped ring having a significant radial extension.
  • the ratio betwen the axial and radial extensions of the jet ring may vary somewhat depending on number of revolutions, type of mixer, the qualities of the liquid to be mixed etc. It is important however, that the inlet rim is directed mainly radially and that the transition from inlet to inlet takes place along an even curve having a relatively big radius. The latter is of course dependant on the diameter of the ring. The bigger the ratio is between the transition radius and the ring diameter, the smaller the flow losses will be and thereby the disturbances (within certain limits). A ratio between 0.1 and 0.3 is normally sufficient. Bigger ratios may cause manufactu­ring problems.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Catching Or Destruction (AREA)
  • Food-Manufacturing Devices (AREA)
EP89850233A 1988-08-16 1989-07-19 Strahlring für Mischer Revoked EP0355082B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8802902A SE8802902L (sv) 1988-08-16 1988-08-16 Straalring foer omroerare
SE8802902 1988-08-16

Publications (2)

Publication Number Publication Date
EP0355082A1 true EP0355082A1 (de) 1990-02-21
EP0355082B1 EP0355082B1 (de) 1993-05-12

Family

ID=20373081

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89850233A Revoked EP0355082B1 (de) 1988-08-16 1989-07-19 Strahlring für Mischer

Country Status (5)

Country Link
EP (1) EP0355082B1 (de)
JP (1) JPH0275333A (de)
AU (1) AU614630B2 (de)
DE (1) DE68906484T2 (de)
SE (1) SE8802902L (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012205577B3 (de) * 2012-04-04 2013-06-06 Invent Umwelt-Und Verfahrenstechnik Ag Horizontalrührwerk

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1446245A (en) * 1923-02-20 Assicotob tq- the eltsia jejstameled pbodtjcts
US1510514A (en) * 1921-12-10 1924-10-07 Walker Noah Agitator
US1765386A (en) * 1925-01-17 1930-06-24 Nat Aniline & Chem Co Inc Producing nonturbulent circulation of liquids
FR1254351A (fr) * 1960-04-19 1961-02-17 Cofinin Company For Financial Procédé de mélange d'une masse liquide hétérogène et dispositif agitateur correspondant
US3365178A (en) * 1965-02-26 1968-01-23 Mowid Anstalt Apparatus for agitating and aerating exposed bodies of water
CH593712A5 (en) * 1975-04-29 1977-12-15 Waelchli Andres Aeration of fermenting liquid fertilisers - using propeller with surrounding flow guide into which air is drawn

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU524892B2 (en) * 1978-01-06 1982-10-07 Mono Pumps Limited Axial-flow and partly axial-flow pumps
GB8334120D0 (en) * 1983-12-21 1984-02-01 Gerry U K Diffusers

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1446245A (en) * 1923-02-20 Assicotob tq- the eltsia jejstameled pbodtjcts
US1510514A (en) * 1921-12-10 1924-10-07 Walker Noah Agitator
US1765386A (en) * 1925-01-17 1930-06-24 Nat Aniline & Chem Co Inc Producing nonturbulent circulation of liquids
FR1254351A (fr) * 1960-04-19 1961-02-17 Cofinin Company For Financial Procédé de mélange d'une masse liquide hétérogène et dispositif agitateur correspondant
US3365178A (en) * 1965-02-26 1968-01-23 Mowid Anstalt Apparatus for agitating and aerating exposed bodies of water
CH593712A5 (en) * 1975-04-29 1977-12-15 Waelchli Andres Aeration of fermenting liquid fertilisers - using propeller with surrounding flow guide into which air is drawn

Also Published As

Publication number Publication date
JPH0275333A (ja) 1990-03-15
SE8802902L (sv) 1990-02-17
SE8802902D0 (sv) 1988-08-16
DE68906484D1 (de) 1993-06-17
AU614630B2 (en) 1991-09-05
DE68906484T2 (de) 1993-12-02
AU3643689A (en) 1990-02-22
EP0355082B1 (de) 1993-05-12

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