EP0580555A1 - Propeller stirrer hub - Google Patents

Propeller stirrer hub Download PDF

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Publication number
EP0580555A1
EP0580555A1 EP93810520A EP93810520A EP0580555A1 EP 0580555 A1 EP0580555 A1 EP 0580555A1 EP 93810520 A EP93810520 A EP 93810520A EP 93810520 A EP93810520 A EP 93810520A EP 0580555 A1 EP0580555 A1 EP 0580555A1
Authority
EP
European Patent Office
Prior art keywords
propeller
hub
clamping device
slowly rotating
arms
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Withdrawn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
EP93810520A
Other languages
German (de)
French (fr)
Inventor
Eduard Arnold
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.)
Arnold AG
Original Assignee
Arnold 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 Arnold AG filed Critical Arnold AG
Publication of EP0580555A1 publication Critical patent/EP0580555A1/en
Withdrawn legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05Stirrers
    • B01F27/07Stirrers characterised by their mounting on the shaft
    • B01F27/071Fixing of the stirrer to the shaft

Definitions

  • the invention relates to a hub for slowly rotating propeller stirrers, according to the characterizing features of claim 1.
  • the stirring serves for the uniform distribution of dissimilar substances in any weight ratio and the stabilization of this state.
  • maintaining the suspended state of the solids has top priority, because the deposition of the chemically biologically active solids leads to anaerobic changes in these substances.
  • Tasks of this type are common in biological wastewater treatment, where the stirrers of slow-running propellers are preferred in order to save energy.
  • Another advantage of these propeller stirrers is that they are less sensitive to blocking by spun fibers and threads than the high-speed machines. In order to be able to treat suspensions with increased fiber and thread content and sufficient availability, propellers with propeller blades bent backwards in the direction of rotation have been proposed.
  • the present invention sets itself the task for the propeller bent backwards in the direction of rotation to create the possibility of changing the propeller geometry. According to the invention, this object is achieved by the characterizing features of claim 1 such that the pitch and the radius of the stirring propeller can be changed.
  • the propeller hub 1 of FIG. 1 has a central bore 2 in the axis of symmetry and shows the three spiral arms 4 ', 4'',4''' protruding from the hub 3 and arched around the hub 3.
  • the arms 4 ', 4'',4''' each end in a clamping device 5 ', 5'',5''' which is shaped like a clamp and directly with the arms 4 ', 4'',4''' connected legs 6 ', 6'',6'' and in each case one leg 7 ', 7 connected to the arms 4', 4 '', 4 ''' by the legs 6', 6 '', 6 ''''', 7 ''.
  • the legs 6 ', 7' and 6 '', 7 '', 6 ''',7''' enclose the recess 8 'and 8'',8''' in a clamp-like manner, which is used to hold and hold the Holmes (not shown) of a propeller wing is used.
  • the circular cross-section of the recesses 8 ', 8'',8''' is intended for receiving and holding the (not shown) cylindrical prop bar.
  • the Clamping devices 5 ', 5'',5'''' are several through holes 9 ', 9'',9''' for receiving screws 10 ', 10'',10''' provided as clamping means for the generation the clamping force and thus for holding the spars of the propeller blades embedded in the recesses 8 ', 8'',8'''.
  • the propeller pitch can be adjusted by turning the propeller blades into the recesses 8 ', 8'',8'''. By moving the propeller spar into the recesses 8 ', 8'',8''' the change in the radius of the propeller blades can be achieved.
  • the recess 8 ′′ of the clamping device 5 ′′ ends in a slot 11 ′′ according to FIG. According to the width of this slot 11 ′′, the cylindrical spar of the propeller blade can be lowered into the clamping device.
  • the fact that a marking or adjustment of the propeller pitch with a notch 12 on the front surface of the clamping device 5 ′′ and a sift in the propeller spar is possible is also indicated in FIG. 1.
  • the shape of the propeller hub 1 in FIGS. 1 and 2 is castable and permits casting, which is considered an inexpensive manufacturing process. For storage and handling, the same design offers the advantage that it is designed as a monoblock and thus consists of one piece except for the clamping means 10.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

So that a propeller stirrer, which on account of the risk of locking has blades arched to the rear in the direction of rotation, has variable geometry, a propeller hub (1) with spirally arched arms (4', 4'', 4''') projecting from the hub (3) is proposed, with in each case a clamping device (5', 5'', 5''') at the end of the arms (4', 4'', 4'''), which serves to accommodate and secure the propeller blades and permits the adjustment of the pitch of the propeller blade and the adjustment of the radius of the propeller blade. <IMAGE>

Description

Die Erfindung betrifft eine Nabe für langsam rotierende Propellerrührer , gemäss den kennzeichnenden Merkmalen des Anspruchs 1.The invention relates to a hub for slowly rotating propeller stirrers, according to the characterizing features of claim 1.

Das Rühren dient für die gleichmässige Verteilung ungleichartiger Stoffe in beliebigem Gewichtsverhältnis und der Stabilisierung dieses Zustandes. Im Falle biochemischer Suspensionen hat die Erhaltung des Schwebezustandes der Feststoffe erste Priorität, weil die Ablagerung der chemisch biologisch aktiven Feststoffe, zu anaeroben Veränderungen dieser Stoffe führt. Aufgaben dieser Art sind in der biologischen Abwasserreinigung häufig, wo Zwecks geringem Energiebedarf die Rührer langsamlaufender Propeller bevorzugt sind. Ein weiterer Vorteil dieser Propellerrührer ist, dass sie auf das Blockieren durch verspinnte Fasern und Fäden, weniger empfindlich als die hochtourige Maschinen sind. Um Suspensionen mit erhöhtem Faser- und Fädenanteil und ausreichender Verfügbarkeit behandeln zu können, sind die Propeller mit in der Drehrichtung nach hinten gebogenen Propellerflügel vorgeschlagen worden.The stirring serves for the uniform distribution of dissimilar substances in any weight ratio and the stabilization of this state. In the case of biochemical suspensions, maintaining the suspended state of the solids has top priority, because the deposition of the chemically biologically active solids leads to anaerobic changes in these substances. Tasks of this type are common in biological wastewater treatment, where the stirrers of slow-running propellers are preferred in order to save energy. Another advantage of these propeller stirrers is that they are less sensitive to blocking by spun fibers and threads than the high-speed machines. In order to be able to treat suspensions with increased fiber and thread content and sufficient availability, propellers with propeller blades bent backwards in the direction of rotation have been proposed.

Mit der Grösse der Propellerrührer wird ihr Leistungsbereich abgestuft. Nach der Installation ist in der Regel die Anpassung des Betriebspunktes Zwecks Optimierung fällig. Für Propeller konventioneller Bauart wird daher die Veränderung der Steigung und/oder die Veränderung der Propellerdrehzahl verwendet. Die Anpassung der Propellersteigung besteht aus Montagearbeit. Einfacher lässt sich die Änderung der Drehzahl mit regelbaren Antrieben vornehmen. Da solche Antriebe teuer sind, wird diese komfortabele Lösung hauptsächlich für die Ermittlung der Antriebsdaten verwendet. Die in der Drehrichtung des Propellers nach hinten gebogenen Propeller eignen sich für die Änderung der Propellersteigung nicht sonderlich. Aus diesem Grunde ist diese für die Abfallbeseitigung günstige Bauart der Rührpropeller mit fester Geometrie konzipiert.Their performance range is graded with the size of the propeller stirrer. After installation, it is usually necessary to adjust the operating point for optimization. For propellers of conventional design, the change in pitch and / or the change in propeller speed is therefore used. The adjustment of the propeller pitch consists of assembly work. Changing the speed is easier with controllable drives. Since such drives are expensive, this convenient solution is mainly used to determine the drive data. The propellers bent backwards in the direction of rotation of the propeller are not particularly suitable for changing the propeller pitch. For this reason, this design of the fixed-pitch stirrer propeller, which is favorable for waste disposal, is designed.

Die vorliegende Erfindung stellt sich die Aufgabe für den in der Drehrichtung nach hinten gebogenen Propeller die Möglichkeit der Veränderung der Propellergeometrie zu schaffen. Erfindungsgemäss wird diese Aufgabe durch die kennzeichnenden Merkmale des Anspruchs 1 so gelöst, dass die Steigung und der Radius des Rührpropellers verändert werden können.The present invention sets itself the task for the propeller bent backwards in the direction of rotation to create the possibility of changing the propeller geometry. According to the invention, this object is achieved by the characterizing features of claim 1 such that the pitch and the radius of the stirring propeller can be changed.

An Hand der beiliegenden Zeichnung wird die Erfindung beispielsweise erläutert. Es zeigen die

Fig. 1
die räumliche Darstellung einer Propellernabe nach der Erfindung,
Fig. 2
ein Längsschnitt durch die Klemmvorrichtung am Ende eines Naben-Armes.
The invention is explained, for example, with reference to the accompanying drawing. They show
Fig. 1
the spatial representation of a propeller hub according to the invention,
Fig. 2
a longitudinal section through the clamping device at the end of a hub arm.

Die Propellernabe 1 der Fig. 1 weist eine zentrale Bohrung 2 in der Symmetrieachse auf und zeigt die drei aus der Nabe 3 herausragenden, spiralförmigen um die Nabe 3 gewölbten Arme 4',4'',4'''. Die Arme 4',4'',4'''enden jeweils in einer Klemmvorrichtung 5',5'',5''' die schellenartig geformt ist und einen mit den Armen 4',4'',4'''direkt verbundenen Schenkel 6', 6'',6''' und jeweils einen mit den Armen 4',4'',4''' durch die Schenkel 6' ,6'',6''' verbundene Schenkel 7',7'',7''' aufweist. Die Schenkel 6',7' und 6'',7'',6''',7''' schliessen die Aussparung 8' und 8'',8''' schellenartig um, die für die Aufnahme und die Halterung des (nichtgezeigten) Holmes eines Propellerflügels dient. Der kreisförmige Querschnitt der Aussparungen 8',8'',8''' ist für die Aufnahme und die Halterung des (nichtgezeigten) zylinderförmigen Propellerholmes bestimmt. In die Schenkeln 6',6'',6''' und 7',7'',7''' der Klemmvorrichtungen 5',5'',5''' sind mehrere Durchgangslöcher 9',9'',9''' für die Aufnahme von Schrauben 10',10'',10''' als Klemmitteln vorgesehen, die für die Erzeugung der Klemmkraft und somit für das Festhalten der in die Aussparungen 8',8'',8''' eingelassenen Holme der Propellerflügel dienen. Durch das Drehen der Propellerflügel in die Aussparungen 8',8'',8''' wird die Verstellung der Propellersteigung möglich. Mit der Verschiebung des Propellerholmes in die Aussparungen 8',8'',8''' kann die Änderung des Radius der Propellerflügel erzielt werden. Die Aussparung 8'' der Klemmvorrichtung 5'' endet gemäss Fig.2 in einem Schlitz 11''. Entsprechend der Breite dieses Schlitzes 11'' lässt sich der zylinder förmige Holm des Propellerflügels in die Klemmvorrichtung senken. Dass eine Markierung oder Justierung der Propellersteigung mit einer Kerbe 12 an der Frontfläche der Klemmvorrichtung 5'' und ein Sift im Propellerholm möglich ist, wird in der Figur 1 ebenfalls angedeutet.
Die Formgebung der Propellernabe 1 der Figuren 1 und 2 ist gussgerecht und lässt das Giessen, das als preiswertes Herstellungsverfahren gilt, zu. Für die Lagerhaltung und die Handhabung bietet dieselbe Ausführung den Vorteil, dass sie als Monoblock ausgeführt ist und somit bis auf die Klemmittel 10 aus einem Stück besteht.
The propeller hub 1 of FIG. 1 has a central bore 2 in the axis of symmetry and shows the three spiral arms 4 ', 4'',4''' protruding from the hub 3 and arched around the hub 3. The arms 4 ', 4'',4''' each end in a clamping device 5 ', 5'',5''' which is shaped like a clamp and directly with the arms 4 ', 4'',4''' connected legs 6 ', 6'',6''' and in each case one leg 7 ', 7 connected to the arms 4', 4 '', 4 ''' by the legs 6', 6 '', 6 ''''', 7 '''. The legs 6 ', 7' and 6 '', 7 '', 6 ''',7''' enclose the recess 8 'and 8'',8''' in a clamp-like manner, which is used to hold and hold the Holmes (not shown) of a propeller wing is used. The circular cross-section of the recesses 8 ', 8'',8''' is intended for receiving and holding the (not shown) cylindrical prop bar. In the legs 6 ', 6'',6''' and 7 ', 7'',7''' the Clamping devices 5 ', 5'',5''' are several through holes 9 ', 9'',9''' for receiving screws 10 ', 10'',10''' provided as clamping means for the generation the clamping force and thus for holding the spars of the propeller blades embedded in the recesses 8 ', 8'',8'''. The propeller pitch can be adjusted by turning the propeller blades into the recesses 8 ', 8'',8'''. By moving the propeller spar into the recesses 8 ', 8'',8''' the change in the radius of the propeller blades can be achieved. The recess 8 ″ of the clamping device 5 ″ ends in a slot 11 ″ according to FIG. According to the width of this slot 11 ″, the cylindrical spar of the propeller blade can be lowered into the clamping device. The fact that a marking or adjustment of the propeller pitch with a notch 12 on the front surface of the clamping device 5 ″ and a sift in the propeller spar is possible is also indicated in FIG. 1.
The shape of the propeller hub 1 in FIGS. 1 and 2 is castable and permits casting, which is considered an inexpensive manufacturing process. For storage and handling, the same design offers the advantage that it is designed as a monoblock and thus consists of one piece except for the clamping means 10.

Claims (6)

Propellernabe 1 für langsam rotierende Propellerrührer mit einer zentralen Bohrung 2 in der Symmetrieachse und aus der Nabe 3 herausragenden Armen, dadurch gekennzeichnet, dass sich die Arme 4',4'',4''' um die Nabe 3 spiralartig wölben und Zwecks Aufnahme und Festhalten der einzelnen Propellerflügel jeweils in einer Klemmvorrichtung 5',5'',5''' enden.Propeller hub 1 for slowly rotating propeller stirrers with a central bore 2 in the axis of symmetry and arms protruding from the hub 3, characterized in that the arms 4 ', 4' ', 4' '' curve spirally around the hub 3 and for the purpose of receiving and Hold the individual propeller blades in each case in a clamping device 5 ', 5' ', 5' ''. Propellernabe 1 für langsam rotierende Propellerrührer nach Anspruch 1 dadurch gekennzeichnet, dass die Klemmvorrichtung 5',5'',5''' am Ende jedes Armes 4',4'',4''' der Nabe 3 schellenartig geformt ist.Propeller hub 1 for slowly rotating propeller stirrer according to claim 1, characterized in that the clamping device 5 ', 5'',5''' at the end of each arm 4 ', 4'',4''' of the hub 3 is shaped like a clamp. Propellernabe 1 für langsam rotierende Propellerrührer nach den Ansprüchen 1 und 2 dadurch gekennzeichnet, dass die Klemmvorrichtung 5',5'',5''' aus je eine Schelle aus den Schenkeln 6',6'',6''' und der Schenkeln 7',7'',7''' und den mechanischen Spannmittel besteht.Propeller hub 1 for slowly rotating propeller stirrers according to claims 1 and 2, characterized in that the clamping device 5 ', 5' ', 5' '' each from a clamp from the legs 6 ', 6' ', 6' '' and the legs 7 ', 7' ', 7' '' and the mechanical clamping means. Propellernabe 1 für langsam rotierende Propellerrührer nach den Ansprüchen 1 bis 3 dadurch gekennzeichnet, dass die Klemmvorrichtung 5',5'',5''' ein Teil von dem Arm 4',4'',4'''ist, in die der Arm 4',4'',4''' endet.Propeller hub 1 for slowly rotating propeller stirrers according to claims 1 to 3, characterized in that the clamping device 5 ', 5' ', 5' '' is part of the arm 4 ', 4' ', 4' '', in which the Arm 4 ', 4' ', 4' '' ends. Propellernabe 1 für langsam rotierende Propellerrührer nach den Ansprüchen 1 bis 4 dadurch gekennzeichnet, dass die Klemmvorrichtung 5',5'',5''' für das Einstellen und Festhalten des Propellerradius dient.Propeller hub 1 for slowly rotating propeller stirrers according to claims 1 to 4, characterized in that the clamping device 5 ', 5' ', 5' '' serves for setting and holding the propeller radius. Propellernabe 1 für langsam rotierende Propellerrührer nach den Ansprüchen 1 bis 5 dadurch gekennzeichnet, dass die Klemmvorrichtung 5',5'',5''' für das Einstellen und Festhalten des Einstellwinkels des Propellers des einzelnen Propellerflügels dient.Propeller hub 1 for slowly rotating propeller stirrers according to claims 1 to 5, characterized in that the clamping device 5 ', 5' ', 5' '' is used for adjusting and holding the setting angle of the propeller of the individual propeller blade.
EP93810520A 1992-07-21 1993-07-20 Propeller stirrer hub Withdrawn EP0580555A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2298/92 1992-07-21
CH2298/92A CH685603A5 (en) 1992-07-21 1992-07-21 Hub for propeller.

Publications (1)

Publication Number Publication Date
EP0580555A1 true EP0580555A1 (en) 1994-01-26

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ID=4230520

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EP93810520A Withdrawn EP0580555A1 (en) 1992-07-21 1993-07-20 Propeller stirrer hub

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CH (1) CH685603A5 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB276266A (en) * 1927-03-30 1927-08-25 Barrymore Concrete Mixer Corp Concrete mixer
FR887413A (en) * 1941-03-06 1943-11-12 Sand and gravel mixer
FR1360251A (en) * 1963-03-25 1964-05-08 Pechiney Saint Gobain Improvement in the mass polymerization of ethylene derivatives
CH487720A (en) * 1968-06-04 1970-03-31 In Nome Collettivo Braima Di T Mixer container for cement conglomerates
FR2236551A1 (en) * 1973-06-26 1975-02-07 Socomel S-shaped blade with inclined wedge ends - for mixer-crusher, secured to driving shaft by conical locking screw

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB276266A (en) * 1927-03-30 1927-08-25 Barrymore Concrete Mixer Corp Concrete mixer
FR887413A (en) * 1941-03-06 1943-11-12 Sand and gravel mixer
FR1360251A (en) * 1963-03-25 1964-05-08 Pechiney Saint Gobain Improvement in the mass polymerization of ethylene derivatives
CH487720A (en) * 1968-06-04 1970-03-31 In Nome Collettivo Braima Di T Mixer container for cement conglomerates
FR2236551A1 (en) * 1973-06-26 1975-02-07 Socomel S-shaped blade with inclined wedge ends - for mixer-crusher, secured to driving shaft by conical locking screw

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Publication number Publication date
CH685603A5 (en) 1995-08-31

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