EP3448577B1 - Outlet nozzle for a centrifugal drum, centrifugal drum and assembly tool - Google Patents

Outlet nozzle for a centrifugal drum, centrifugal drum and assembly tool Download PDF

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Publication number
EP3448577B1
EP3448577B1 EP17716815.0A EP17716815A EP3448577B1 EP 3448577 B1 EP3448577 B1 EP 3448577B1 EP 17716815 A EP17716815 A EP 17716815A EP 3448577 B1 EP3448577 B1 EP 3448577B1
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EP
European Patent Office
Prior art keywords
outlet
nozzle
drum
outlet nozzle
protrusion
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.)
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Application number
EP17716815.0A
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German (de)
French (fr)
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EP3448577A1 (en
Inventor
Kristin Katja KETTERER
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GEA Mechanical Equipment GmbH
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GEA Mechanical Equipment GmbH
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Priority to PL17716815T priority Critical patent/PL3448577T3/en
Publication of EP3448577A1 publication Critical patent/EP3448577A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
    • B04B1/10—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
    • B04B1/10—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl
    • B04B1/12—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl with continuous discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
    • B04B1/04—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with inserted separating walls
    • B04B1/08—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with inserted separating walls of conical shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/02—Continuous feeding or discharging; Control arrangements therefor

Definitions

  • the invention relates to an outlet nozzle for a centrifuge drum according to the preamble of claim 1, to a centrifuge drum with such an outlet nozzle and to an assembly tool for mounting an outlet nozzle in an opening of the centrifuge drum.
  • the diameter of the inlet opening of the outlet nozzle in the region of the nozzle body is either the same size as the diameter of the outlet channel or it is a maximum of 50 percent larger or 50 percent smaller than the diameter of the outlet channel.
  • the inlet space is constantly expanding to a maximum diameter.
  • the diameter of the outlet duct in the nozzle block initially tapers to a narrow point and then widens in one of the variants of the DE 195 27 039 C1 conical at an angle of at least 5 °.
  • the WO 2014/086 735 A2 proposed that the narrowest point in terms of cross section of the outlet channel is formed by the inlet opening itself. It is further provided that the cross section of the outlet channel does not decrease at any point over the preferably entire axial length of the outlet channel in the exit direction - apart from a possibly provided manufacturing radius at the inlet. In this way, the tendency to clog and the formation of the nozzle jet are reduced by simply implementing a change in the design of the outlet duct of the nozzle block.
  • the task is to create an outlet nozzle which is advantageous from a hygienic point of view and also from an energy point of view, and a centrifuge drum with such an outlet nozzle.
  • Claim 1 creates an outlet nozzle for centrifuge drums with a nozzle body which has at least one cylindrical section and a shoulder, an inlet channel and an outlet channel oriented at an angle to it being formed in the nozzle body, and the shoulder having a torque transmission contour for attaching a tool with a complementarily designed tool -Torque transmission contour is provided in order to rotationally fasten the nozzle body in an opening of a rotatable centrifuge drum and to detach it from it, the attachment having a polygonal, in particular a rectangular, cross section which is smaller than the cross section of the cylindrical section, and wherein the attachment is starting passes from the polygonal, in particular rectangular cross-section over rounded surfaces with a radius with a size of more than 1.5 mm into the cylindrical section of the nozzle body.
  • This outlet nozzle is easy to assemble and disassemble and has a torque transmission contour that is hardly prone to dirt or build-up and is easy to clean hygienically.
  • attachment merges into the cylindrical section of the nozzle body via rounded surfaces with a radius with a size of more than 2.0 mm.
  • the inlet channel and the outlet channel are aligned / formed at an obtuse angle to one another.
  • an outlet end of the outlet channel is formed in the region of the shoulder, it being further preferred that the outlet end of the outlet channel is in an outer radial region , in particular the outer half of the approach.
  • the invention also advantageously provides a centrifuge drum with a drum wall which has a plurality of circumferentially distributed openings for inserting outlet nozzles, which are designed according to one of claims 1 to 5.
  • Fig. 3 shows a double-conical centrifuge drum designed as a separator drum 100, with a drum wall 110, which is preferably designed for continuous operation - ie the continuous and non-batch processing of a product.
  • the separator drum 100 has a vertical axis of rotation D.
  • a stack of separating plates 300 composed of conical separating plates 400 is arranged in the drum interior - also called the centrifugal chamber 200.
  • the separating plates 400 are arranged on a distributor shaft 600.
  • An inlet pipe 500 serves to feed a product to be processed into distribution channels 700 and from these into the centrifugal chamber 200.
  • the centrifugal chamber 200 clarifies the product from solids and optionally separates it into two or more liquid phases of different densities.
  • One or more processes 900 for liquid phases which can be provided, for example, with peeling disks, are used to discharge the at least one liquid phase.
  • the solids are expelled from the centrifuge drum 100 through circumferentially distributed, radially extending openings 800, preferably in the region of the largest radius / circumference of the centrifuge drum.
  • an outlet nozzle 1 is inserted into the cylindrical openings 800 of the drum wall 110, preferably screwed in ( Fig. 1a , 1b ).
  • the openings 800 are substantially radially aligned in the drum wall 110.
  • the outlet nozzle 1 has a nozzle body 2.
  • the nozzle body 2 is essentially cylindrical in shape.
  • an inlet duct 3 and an outlet duct 4 running at an obtuse angle to the inlet duct 3 are formed at an angle 91 ° ⁇ alpha ⁇ 179 °.
  • a nozzle block - see the prior art mentioned at the beginning - is not provided here in the nozzle body 2, but is optionally conceivable.
  • the outlet channel 4 is directed "backwards" in such a way that in an energy balance the energy loss of the rotating system "centrifuge drum 100" due to the product discharge is less than would be the case if the solid was expelled radially from the centrifuge drum 100.
  • the inlet channel 3 has an inlet opening 3a towards the inside of the drum, an adjoining short, conically tapering (funnel-like) section 3b, an adjoining longer cylindrical section 3c and a rounded channel end 3d with a radius R.
  • the outlet duct 4 has an inlet opening 4a at the duct end 3d - here in the radius R of the duct end 3d - of the inlet duct 3, an adjoining cylindrical section 4b and an opening 4c spaced therefrom in the outlet direction A by an axial distance.
  • the inlet channel 3 and the outlet channel 4 each have a constant diameter over most of their axial length.
  • the diameter of the outlet channel 4 is smaller, in particular by more than 50% smaller than the diameter of the inlet channel 3.
  • the outlet channel 4 is axially shorter, in particular by more than 50% shorter than the inlet channel 3.
  • the nozzle body 2 is preferably a component that is rotationally symmetrical except for a torque transmission contour 5. It is easy to manufacture in this way. It has a section 2a of a smaller outside diameter radially on the inside and a section 2b of a larger outside diameter adjoining it.
  • the torque transmission contour 5 forms an extension 2c which adjoins the cylindrical section 2b radially outward.
  • Two or more seals 6a, 6b - in particular each designed as a sealing ring - on the outer circumference of the nozzle body 2 seal the outlet nozzle 1 against the inner circumference of the opening 800 in the drum wall 110. These are positioned on the outlet nozzle in such a way that, when the outlet nozzle is installed, only short and easy-to-clean gaps are formed to the outer contour of the drum wall 110 or to the intermediate space 960.
  • the seals 6a, 6b are preferably arranged less than 5 mm or even less than 3 mm away from the ends of the cylindrical sections 2b, 2a.
  • a thread 7 on the outer circumference of the nozzle body 2 also enables the respective nozzle body 2 to be screwed into the drum wall or into the openings 800 in the drum wall 110, which has a corresponding thread.
  • a bayonet lock or similar locks with rotating opening or closing movements can also be used here.
  • the thread 7 is preferably formed on the outside of the section 2b of larger diameter.
  • the section 2b of larger diameter is screwed into the separator drum 100 or into the drum wall 110 of the opening 800.
  • the sections of smaller diameter 2a extend into spaces or openings 960 in inserts 950 in the interior of the separator drum 100, which are shaped such that they conduct a solid phase to the outlet nozzles 1 like a funnel.
  • the torque transmission contour 5 is formed at one end of the essentially cylindrical nozzle body 2.
  • the contour 5 In the state screwed into the separator drum 100, the contour 5 is accessible from the outside and thus allows the outlet nozzle to be screwed into the opening 800 of the separator drum 100 and the outlet nozzle 1 to be screwed out of the separator drum 100. However, it is fully screwed into the opening 800 Condition does not extend radially outward over the outer circumference of the separator drum 100, but is accessible in the outer region of the opening (bore) 800.
  • an inclined recess in particular a cutout 115, is formed in the drum wall 110 against the direction of rotation U in the reverse direction on the outside of the drum wall 110, preferably behind each of the openings 800.
  • These cutouts are designed such that the product is ejected obliquely backwards along the cutout 115 during operation, ie while the drum is rotating at an operating speed, without touching the cutout in the drum wall 110.
  • the radial depth of the oblique cutouts against the direction of rotation U becomes increasingly smaller with increasing distance from the respective opening 800 and becomes zero in front of the next opening 800 in the circumferential direction (backwards).
  • the torque transmission contour 5 has a non-cylindrical geometry.
  • it is advantageously designed as a rectangular extension 2c which is essentially flattened in cross section at the end and which adjoins the cylindrical section 2b.
  • circular chords have been cut out at the ends from an imaginary cylinder geometry, the straight base sides or long sides 5a, 5b of which are parallel to one another.
  • These basic sides form the longer sides of the polygonal contour or here the rectangular contour of attachment 2c.
  • the two other sides are the short sides 5c and 5d of the rectangular contour of the attachment 2c.
  • rounded surfaces are formed on the long sides 5a, 5b, which widen outwards to the cylindrical section 2b. It is preferably provided that, starting from the polygonal, in particular rectangular cross-section, rounded portions with a radius R1 greater than 1.0 mm, in particular more than 2 mm, merge into the cylindrical section of the nozzle body.
  • the radii R1 are advantageously dimensioned here such that they are as large as the maximum distance between the parallel base sides 5a, 5b of the torque transmission contour 5 and the outer circumference of the cylindrical section 2b, which has a larger cross section than the shoulder 2c.
  • a transition region to the torque transmission section 5 is created with large or outwardly opening radii R1. This is because such radii R1 have a significantly lower tendency to become soiled or clingy than undercuts or the like. In this respect, a torque transmission contour 5 which is only slightly or not at all soiling or clinging is created, which is easy to clean hygienically.
  • One of the short sides - the short side 5d - of the torque transmission contour 5 is designed as an inclined surface.
  • the inclined surface is formed on the short side 5d directed backwards against the direction of rotation U during operation of the separator drum 100.
  • the opening 4c of the outlet channel 4 lies in the region of this inclined surface. It is preferably in the radially outer half of the inclined surface or the short side 5d.
  • the inclined surface 5d is further preferably oriented perpendicular to the axial direction of the outlet channel 3.
  • An assembly tool 10 is used to assemble and disassemble the outlet nozzle 1 (see Fig. 2a ).
  • the assembly tool 10 is configured in two parts. It has a rotatable socket wrench 11 and a sleeve 12 which can be inserted via the socket wrench 11.
  • the socket wrench 11 of the assembly tool 10 has a torque transmission contour 13 which is complementary to the torque transmission contour 5 of the outlet nozzle 1 and is designed here as a slot.
  • the socket wrench can be placed on the torque transmission contour 5 in the area of the slot.
  • the slot is shaped in such a way that it can be positively placed on the complementary torque transmission contour 5 of the outlet nozzle in such a way that the outlet nozzle 5 can be screwed in and out into the outlet opening 800 and out of the outlet opening 800.
  • the assembly mouth 13 is followed by a type of rod or shaft 14, on the end of which, facing away from the torque transmission contour 13, is in turn a handle or an attachment for another tool (not shown here) in order to be able to turn the socket wrench 11.
  • the sleeve 12 is pushed over the socket wrench 11, the inside diameter of which is dimensioned such that the outlet nozzle 1 can be locked captively on the sealing ring 6b in the end of the tube.
  • the sleeve 12 with the clamped outlet nozzle 1 can be guided for assembly until shortly before the opening 800 of the drum wall 110.
  • the nozzle body 2 is then screwed into the outlet opening 800 using the socket wrench.
  • the sleeve 12 and the outlet opening 800 may have complementary conical insertion sections that are designed to allow the end of the sleeve 12 to engage the end of the outlet opening 800.
  • the end of the sleeve 12 is inserted into the radially outer end (preferably provided at the end with a short funnel geometry that facilitates the insertion of the sleeve 12) into the drum wall 110 and held there with a predetermined force.
  • the outlet nozzle 1 is then unscrewed with the socket wrench 11 until, when the sealing ring 6b of the outlet nozzle 1 is unscrewed, it slides into the sleeve 12, since the sleeve 12 is pressed into the opening 800 (or the opening 800) with a predetermined force.
  • the outlet nozzle 1 can now be completely screwed out of the outlet opening and finally removed or removed in the tube 12 from the space surrounding the centrifuge drum 100.

Landscapes

  • Centrifugal Separators (AREA)
  • Nozzles (AREA)

Description

Die Erfindung bezieht sich auf eine Auslassdüse für eine Zentrifugentrommel nach dem Oberbegriff des Anspruchs 1, auf eine Zentrifugentrommel mit einer solchen Auslassdüse und auf ein Montagewerkzeug zur Montage einer Auslassdüse in einer Öffnung der Zentrifugentrommel.The invention relates to an outlet nozzle for a centrifuge drum according to the preamble of claim 1, to a centrifuge drum with such an outlet nozzle and to an assembly tool for mounting an outlet nozzle in an opening of the centrifuge drum.

Auslassdüsen des Standes der Technik zeigen die DE 39 22 619 C1 , die DE 41 05 903 A1 , die US 2 560 239 und die DE 195 27 039 C1 sowie die gattungsgemäße
WO2006029200 .Prior art outlet nozzles show that DE 39 22 619 C1 , the DE 41 05 903 A1 , the US 2,560,239 and the DE 195 27 039 C1 as well as the generic
WO2006029200 .

Nach der Lehre der DE 195 27 039 C1 ist der Durchmesser der Eintrittsöffnung der Auslassdüse im Bereich des Düsenkörpers entweder genauso groß wie der Durchmesser des Auslasskanals oder er ist maximal 50 Prozent größer oder um 50 Prozent kleiner als der Durchmesser des Auslasskanals. Darüber hinaus weitet sich der Einlaufraum bis zu einem größten Durchmesser stetig auf. Der Durchmesser des Auslasskanals im Düsenstein verjüngt sich zunächst bis zu einer Engstelle und weitet sich dann bei einer der Varianten der DE 195 27 039 C1 um einen Winkel von wenigstens 5° konisch auf.According to the teaching of DE 195 27 039 C1 the diameter of the inlet opening of the outlet nozzle in the region of the nozzle body is either the same size as the diameter of the outlet channel or it is a maximum of 50 percent larger or 50 percent smaller than the diameter of the outlet channel. In addition, the inlet space is constantly expanding to a maximum diameter. The diameter of the outlet duct in the nozzle block initially tapers to a narrow point and then widens in one of the variants of the DE 195 27 039 C1 conical at an angle of at least 5 °.

Um die Verstopfungsneigung der Auslassdüse weiter zu verringern und um den Austrittsstrahl positiv zu beeinflussen, wird in der WO 2014/086 735 A2 vorgeschlagen, dass die in Hinsicht auf den Querschnitt engste Stelle des Auslasskanals von der Eintrittsöffnung selbst gebildet wird. Es ist ferner vorgesehen, dass sich der Querschnitt des Auslasskanals über die vorzugsweise gesamte axiale Länge des Auslasskanals in Austrittsrichtung an keiner Stelle - abgesehen von einem ggf. vorgesehenen Fertigungsradius am Einlass - verringert. Derart wird die Verstopfungsneigung und Düsenstrahlausbildung durch einfach umzusetzende Veränderung der Ausgestaltung des Auslasskanals des Düsensteins verringert.In order to further reduce the tendency of the outlet nozzle to clog and to positively influence the outlet jet, the WO 2014/086 735 A2 proposed that the narrowest point in terms of cross section of the outlet channel is formed by the inlet opening itself. It is further provided that the cross section of the outlet channel does not decrease at any point over the preferably entire axial length of the outlet channel in the exit direction - apart from a possibly provided manufacturing radius at the inlet. In this way, the tendency to clog and the formation of the nozzle jet are reduced by simply implementing a change in the design of the outlet duct of the nozzle block.

Zur Montage und Demontage derartiger Auslassdüsen sind Werkzeuge mit einer schwalbenschwanzförmigen Nut bekannt, die über einen im montierten Zustand radial äußeren schwalbenschanzartigen Ansatz der Auslassdüse schiebbar sind. Mit diesem Werkzeug kann die Düse, die ein Außengewinde oder ein Außenbajonett aufweist, in eine Trommelöffnung mit Innengewinde hinein und wieder aus dieser herausgeschraubt werden. Zur Vermeidung der Verschmutzungsneigung und zur besseren hygienischen Reinigbarkeit sollte eine Alternative zu dieser Lösung mit vielen Hinterschnitten und Spalten geschaffen werden, die keinen Schwalbenschwanz benötigt und keine schwer reinigbaren Spalte aufweist.Tools with a dovetail-shaped groove are known for the assembly and disassembly of such outlet nozzles, which can be pushed over a dovetail-like extension of the outlet nozzle which is radially outer in the assembled state. With In this tool, the nozzle, which has an external thread or an external bayonet, can be screwed into and out of a drum opening with an internal thread. To avoid the tendency to become dirty and for better hygienic cleanability, an alternative to this solution with many undercuts and gaps should be created, which does not require a dovetail and has no gaps that are difficult to clean.

Ausgehend von dem bekannten Stand der Technik ist es die Aufgabe, eine aus hygienischer Sicht und auch aus energetischer Sicht vorteilhafte Auslassdüse, sowie eine Zentrifugentrommel mit einer solchen Auslassdüse zu schaffen.Starting from the known prior art, the task is to create an outlet nozzle which is advantageous from a hygienic point of view and also from an energy point of view, and a centrifuge drum with such an outlet nozzle.

Die Erfindung löst diese Aufgaben durch die Gegenstände der Ansprüche 1-9.The invention solves these problems by the subject matter of claims 1-9.

Anspruch 1 schafft eine Auslassdüse für Zentrifugentrommeln mit einem Düsenkörper, der wenigstens einen zylindrischen Abschnitt aufweist und einen Ansatz, wobei im Düsenkörper ein Einlasskanal und ein winklig dazu ausgerichteter Auslasskanal ausgebildet sind und wobei der Ansatz mit einer Drehmomentübertragungskontur zum Ansetzen eines Werkzeugs mit einem komplementär ausgebildeten Werkzeug-Drehmomentübertragungskontur versehen ist, um den Düsenkörper drehend in einer Öffnung einer drehbaren Zentrifugentrommel zu befestigen und aus dieser zu lösen, wobei der Ansatz einen mehreckigen, insbesondere einen rechteckigen Querschnitt aufweist, der kleiner ist als der Querschnitt des zylindrischen Abschnitts, und wobei der Ansatz ausgehend von dem mehreckigen, insbesondere rechteckigen Querschnitt über abgerundete Flächen mit einem Radius mit einer Größe von mehr als 1,5 mm in den zylindrischen Abschnitt des Düsenkörpers übergeht.Claim 1 creates an outlet nozzle for centrifuge drums with a nozzle body which has at least one cylindrical section and a shoulder, an inlet channel and an outlet channel oriented at an angle to it being formed in the nozzle body, and the shoulder having a torque transmission contour for attaching a tool with a complementarily designed tool -Torque transmission contour is provided in order to rotationally fasten the nozzle body in an opening of a rotatable centrifuge drum and to detach it from it, the attachment having a polygonal, in particular a rectangular, cross section which is smaller than the cross section of the cylindrical section, and wherein the attachment is starting passes from the polygonal, in particular rectangular cross-section over rounded surfaces with a radius with a size of more than 1.5 mm into the cylindrical section of the nozzle body.

Diese Auslassdüse ist leicht montierbar und demontierbar und weist eine Drehmomentübertragungskontur auf, die kaum zu Verschmutzungen oder Anhaftungen neigt und gut hygienisch zu reinigen ist.This outlet nozzle is easy to assemble and disassemble and has a torque transmission contour that is hardly prone to dirt or build-up and is easy to clean hygienically.

Es ist dazu weiter zweckmäßig und noch vorteilhafter, wenn der Ansatz über abgerundete Flächen mit einem Radius mit einer Größe von mehr als 2,0 mm in den zylindrischen Abschnitt des Düsenkörpers übergeht.It is furthermore expedient and even more advantageous if the attachment merges into the cylindrical section of the nozzle body via rounded surfaces with a radius with a size of more than 2.0 mm.

Strömungstechnisch ist es vorteilhaft, wenn der Einlasskanal und der Auslasskanal stumpfwinklig zueinander ausgerichtet/ausgebildet sind.From a fluidic point of view, it is advantageous if the inlet channel and the outlet channel are aligned / formed at an obtuse angle to one another.

Um zu verhindern, dass ein großer Teil der aus den Öffnungen austretenden Produktphase gegen die Trommel spritzt, ist es vorteilhaft, wenn ein Austrittsende des Auslasskanals im Bereich des Ansatzes ausgebildet ist, wobei weiter bevorzugt wird, dass das Austrittsende des Auslasskanals in einem äußeren radialen Bereich, insbesondere der äußeren Hälfte des Ansatzes ausgebildet ist.In order to prevent a large part of the product phase emerging from the openings from splashing against the drum, it is advantageous if an outlet end of the outlet channel is formed in the region of the shoulder, it being further preferred that the outlet end of the outlet channel is in an outer radial region , in particular the outer half of the approach.

Die Erfindung schafft ferner in vorteilhafter Weise eine Zentrifugentrommel mit einer Trommelwand, der eine Mehrzahl umfangsverteilter Öffnungen zum Einsetzen von Auslassdüsen aufweist, welche nach einem der Ansprüche 1 bis 5 ausgebildet sind.The invention also advantageously provides a centrifuge drum with a drum wall which has a plurality of circumferentially distributed openings for inserting outlet nozzles, which are designed according to one of claims 1 to 5.

Weitere vorteilhafte Ausgestaltungen sind den Unteransprüchen zu entnehmen.Further advantageous refinements can be found in the subclaims.

Nachfolgend wird die Erfindung anhand eines Ausführungsbeispiels unter Bezug auf die Figuren näher beschrieben. Es zeigen:

Fig. 1
in a) einen Schnitt durch einen radial äußeren Teilbereich einer Zentrifugentrommel mit einer Auslassdüse, wobei die Drehachse in der Schnittebene verläuft und in b) einen Schnitt durch den Abschnitt aus a), wobei die Drehachse senkrecht zur Schnittebene verläuft; und
Fig. 2a
die Anordnung aus Fig. 1 mit einem Montagewerkzeug; und
Fig. 3
eine schematische Darstellung einer Zentrifugentrommel, in welche die erfindungsgemäßen Auslassdüsen einsetzbar sind.
The invention is described in more detail below using an exemplary embodiment with reference to the figures. Show it:
Fig. 1
in a) a section through a radially outer portion of a centrifuge drum with an outlet nozzle, the axis of rotation running in the section plane and in b) a section through the section from a), the axis of rotation running perpendicular to the section plane; and
Fig. 2a
the arrangement Fig. 1 with an assembly tool; and
Fig. 3
a schematic representation of a centrifuge drum in which the outlet nozzles according to the invention can be used.

Fig. 3 zeigt eine doppelt-konische, als Separatortrommel 100 ausgebildete Zentrifugentrommel, mit einer Trommelwand 110, die vorzugsweise für einen kontinuierlichen Betrieb - d.h. die kontinuierliche und nicht chargenweise Verarbeitung eines Produktes - ausgelegt ist. Fig. 3 shows a double-conical centrifuge drum designed as a separator drum 100, with a drum wall 110, which is preferably designed for continuous operation - ie the continuous and non-batch processing of a product.

Die Separatortrommel 100 weist eine vertikale Drehachse D auf. In der konischen bzw. hier sogar doppelt-konisch geformten Separatortrommel 100 ist im Trommelinnenraum - auch Schleuderraum 200 genannt - ein Trenntellerstapel 300 aus konischen Trenntellern 400 angeordnet. Die Trennteller 400 sind auf einem Verteilerschaft 600 angeordnet. Ein Zulaufrohr 500 dient zur Zuleitung eines zu verarbeitenden Produktes in Verteilerkanäle 700 und aus diesen in den Schleuderraum 200. In dem Schleuderraum 200 erfolgt eine Klärung des Produktes von Feststoffen erfolgt sowie ggf. optional eine Trennung in zwei oder mehr Flüssigkeitsphasen unterschiedlicher Dichte.The separator drum 100 has a vertical axis of rotation D. In the conical or even double-conically shaped separator drum 100, a stack of separating plates 300 composed of conical separating plates 400 is arranged in the drum interior - also called the centrifugal chamber 200. The separating plates 400 are arranged on a distributor shaft 600. An inlet pipe 500 serves to feed a product to be processed into distribution channels 700 and from these into the centrifugal chamber 200. The centrifugal chamber 200 clarifies the product from solids and optionally separates it into two or more liquid phases of different densities.

Zur Ableitung der wenigstens einen Flüssigkeitsphase dienen einer oder mehrere Abläufe 900 für Flüssigkeitsphasen, die beispielsweise mit Schälscheiben versehen sein können.One or more processes 900 for liquid phases, which can be provided, for example, with peeling disks, are used to discharge the at least one liquid phase.

Die Feststoffe werden dagegen durch umfangsverteilte, sich radial erstreckende Öffnungen 800 vorzugsweise im Bereich des größten Radius/Umfangs der Zentrifugentrommel aus der Zentrifugentrommel 100 nach außen ausgestoßen.In contrast, the solids are expelled from the centrifuge drum 100 through circumferentially distributed, radially extending openings 800, preferably in the region of the largest radius / circumference of the centrifuge drum.

Hierzu wird in die zylindrischen Öffnungen 800 der Trommelwand 110 jeweils eine Auslassdüse 1 eingesetzt, vorzugsweise eingeschraubt (Fig. 1a, 1b). Die Öffnungen 800 sind in der Trommelwand 110 im Wesentlichen radial ausgerichtet.
Die Auslassdüse 1 weist einen Düsenkörper 2 auf. Der Düsenkörper 2 ist im Wesentlichen zylindrischer Gestalt. Im Düsenkörper 2 sind ein Einlasskanal 3 und ein stumpfwinklig zum Einlasskanal 3 in einem Winkel 91° < Alpha < 179° verlaufender Auslasskanal 4 ausgebildet. Ein Düsenstein - siehe den eingangs genannten Stand der Technik - ist hier im Düsenkörper 2 nicht vorgesehen, ist aber optional denkbar.For this purpose, an outlet nozzle 1 is inserted into the cylindrical openings 800 of the drum wall 110, preferably screwed in ( Fig. 1a , 1b ). The openings 800 are substantially radially aligned in the drum wall 110.
The outlet nozzle 1 has a nozzle body 2. The nozzle body 2 is essentially cylindrical in shape. In the nozzle body 2, an inlet duct 3 and an outlet duct 4 running at an obtuse angle to the inlet duct 3 are formed at an angle 91 ° <alpha <179 °. A nozzle block - see the prior art mentioned at the beginning - is not provided here in the nozzle body 2, but is optionally conceivable.

Bezogen auf die Drehrichtung U ist der Auslasskanal 4 derart "rückwärts" gerichtet, dass in einer Energiebilanz der Energieverlust des drehenden Systems "Zentrifugentrommel 100" durch den Produktausstoß geringer ist als er bei einem radialen Ausstoß des Feststoffes aus der Zentrifugentrommel 100 wäre.Relative to the direction of rotation U, the outlet channel 4 is directed "backwards" in such a way that in an energy balance the energy loss of the rotating system "centrifuge drum 100" due to the product discharge is less than would be the case if the solid was expelled radially from the centrifuge drum 100.

Der Einlasskanal 3 weist zum Inneren der Trommel hin eine Einlassöffnung 3a auf, einen sich daran anschließenden kurzen sich konisch verjüngenden (trichterartigen) Abschnitt 3b, einen sich daran anschließenden längeren zylindrischen Abschnitt 3c und ein abgerundetes Kanalende 3d mit einem Radius R.The inlet channel 3 has an inlet opening 3a towards the inside of the drum, an adjoining short, conically tapering (funnel-like) section 3b, an adjoining longer cylindrical section 3c and a rounded channel end 3d with a radius R.

Der Auslasskanal 4 weist eine am Kanalende 3d - hier im Radius R des Kanalendes 3d - des Einlasskanals 3 ansetzende Eintrittsöffnung 4a auf, einen sich daran anschließenden zylindrischen Abschnitt 4b und eine hierzu in Austrittsrichtung A um eine axiale Strecke beabstandete Öffnung 4c.The outlet duct 4 has an inlet opening 4a at the duct end 3d - here in the radius R of the duct end 3d - of the inlet duct 3, an adjoining cylindrical section 4b and an opening 4c spaced therefrom in the outlet direction A by an axial distance.

Der Einlasskanal 3 und der Auslasskanal 4 weisen hier über den größten Teil ihrer axialen Länge jeweils einen konstanten Durchmesser auf. Dabei ist der Durchmesser des Auslasskanals 4 kleiner, insbesondere um mehr als 50% kleiner als der Durchmesser des Einlasskanals 3. Zudem ist der Auslasskanal 4 axial kürzer, insbesondere um mehr als 50% kürzer als der Einlasskanal 3.The inlet channel 3 and the outlet channel 4 each have a constant diameter over most of their axial length. The diameter of the outlet channel 4 is smaller, in particular by more than 50% smaller than the diameter of the inlet channel 3. In addition, the outlet channel 4 is axially shorter, in particular by more than 50% shorter than the inlet channel 3.

Der Düsenkörper 2 ist vorzugsweise ein bis auf eine Drehmomentübertragungskontur 5 rotationsymmetrisches Bauteil. Derart ist er leicht herstellbar. Er weist radial innen einen Abschnitt 2a kleineren Außendurchmessers auf und einen sich daran anschließenden Abschnitt 2b größeren Außendurchmessers. Die Drehmomentübertragungskontur 5 bildet einen Ansatz 2c, der sich radial nach außen hin an den zylindrischen Abschnitt 2b anschließt.The nozzle body 2 is preferably a component that is rotationally symmetrical except for a torque transmission contour 5. It is easy to manufacture in this way. It has a section 2a of a smaller outside diameter radially on the inside and a section 2b of a larger outside diameter adjoining it. The torque transmission contour 5 forms an extension 2c which adjoins the cylindrical section 2b radially outward.

Zwei oder mehr Dichtungen 6a, 6b - insbesondere jeweils als Dichtring ausgebildet - am Außenumfang des Düsenkörpers 2 dichten die Auslassdüse 1 gegen den Innenumfang der Öffnung 800 in der Trommelwand 110 ab. Diese sind so auf der Auslassdüse positioniert, dass sich bei montierter Auslassdüse nur kurze und gut reinigbare Spalte zur Außenkontur der Trommelwand 110 bzw. zu dem Zwischenraum 960 bilden. Insbesondere bedeutet dies, dass die Dichtungen 6a, 6b vorzugsweise weniger als 5 mm oder sogar weniger als 3 mm Abstand vor den Enden der zylindrischen Abschnitte 2b, 2a angebracht sind.Two or more seals 6a, 6b - in particular each designed as a sealing ring - on the outer circumference of the nozzle body 2 seal the outlet nozzle 1 against the inner circumference of the opening 800 in the drum wall 110. These are positioned on the outlet nozzle in such a way that, when the outlet nozzle is installed, only short and easy-to-clean gaps are formed to the outer contour of the drum wall 110 or to the intermediate space 960. In particular, this means that the seals 6a, 6b are preferably arranged less than 5 mm or even less than 3 mm away from the ends of the cylindrical sections 2b, 2a.

Ein Gewinde 7 am Außenumfang des Düsenkörpers 2 ermöglicht ferner ein Einschrauben des jeweiligen Düsenkörpers 2 in die Trommelwand bzw. in die Öffnungen 800 in der Trommelwand 110, die ein korrespondierendes Gewinde aufweist. Auch ein Bajonettverschluss oder ähnliche Verschlüsse mit drehender Öffnungs- oder Schließbewegung sind hier einsetzbar.A thread 7 on the outer circumference of the nozzle body 2 also enables the respective nozzle body 2 to be screwed into the drum wall or into the openings 800 in the drum wall 110, which has a corresponding thread. A bayonet lock or similar locks with rotating opening or closing movements can also be used here.

Vorzugsweise ist das Gewinde 7 außen an dem Abschnitt 2b größeren Durchmessers ausgebildet. Der Abschnitt 2b größeren Durchmessers ist in die Separatortrommel 100 bzw. in deren Trommelwand 110 in die Öffnung 800 eingeschraubt. Die Abschnitte kleineren Durchmessers 2a erstrecken sich hingegen in Zwischenräume oder Öffnungen 960 in Einsatzstücken 950 im Innenraum der Separatortrommel 100, welche so geformt sind, dass sie eine Feststoffphase wie ein Trichter zu den Auslassdüsen 1 leiten.The thread 7 is preferably formed on the outside of the section 2b of larger diameter. The section 2b of larger diameter is screwed into the separator drum 100 or into the drum wall 110 of the opening 800. The sections of smaller diameter 2a, on the other hand, extend into spaces or openings 960 in inserts 950 in the interior of the separator drum 100, which are shaped such that they conduct a solid phase to the outlet nozzles 1 like a funnel.

Die Drehmomentübertragungskontur 5 ist an dem einen Ende des im Wesentlichen zylindrischen Düsenkörpers 2 ausgebildet. In dem in die Separatortrommel 100 eingeschraubten Zustand ist die Kontur 5 von außen zugänglich und ermöglicht derart ein Eindrehen der Auslassdüse in die Öffnung 800 der Separatortrommel 100 und ein Herausdrehen der Auslassdüse 1 aus der Separatortrommel 100. Sie steht aber im vollständig in die Öffnung 800 eingedrehten Zustand nicht über den äußeren Umfang der Separatortrommel 100 radial nach außen vor, sondern ist im äußeren Bereich der Öffnung (Bohrung) 800 zugänglich. Dazu, und um zu gewährleisten, dass - bezogen auf die Drehrichtung U der Auslasskanal 4 "rückwärts" gerichtet ist, ist jeweils gegen die Drehrichtung U in Rückwärtsrichtung außen an der Trommelwand 110 vorzugsweise hinter jeder der Öffnungen 800 jeweils eine schräge Aussparung, insbesondere eine Ausfräsung 115, in der Trommelwand 110 ausgebildet. Diese Aussparungen sind so ausgelegt, dass das Produkt im Betrieb - d.h. während sich die Trommel mit einer Betriebsdrehzahl dreht - schräg nach hinten entlang der Aussparung 115 ausgestoßen wird, ohne dabei die Aussparung in der Trommelwand 110 zu berühren. Dazu wird die radiale Tiefe der schrägen Aussparungen gegen die Drehrichtung U mit zunehmendem Abstand von der jeweiligen Öffnung 800 immer geringer und wird vor der in Umfangsrichtung (rückwärts) nächsten Öffnung 800 gleich Null.The torque transmission contour 5 is formed at one end of the essentially cylindrical nozzle body 2. In the state screwed into the separator drum 100, the contour 5 is accessible from the outside and thus allows the outlet nozzle to be screwed into the opening 800 of the separator drum 100 and the outlet nozzle 1 to be screwed out of the separator drum 100. However, it is fully screwed into the opening 800 Condition does not extend radially outward over the outer circumference of the separator drum 100, but is accessible in the outer region of the opening (bore) 800. To do this and to ensure that - With respect to the direction of rotation U, the outlet channel 4 is directed “backwards”, an inclined recess, in particular a cutout 115, is formed in the drum wall 110 against the direction of rotation U in the reverse direction on the outside of the drum wall 110, preferably behind each of the openings 800. These cutouts are designed such that the product is ejected obliquely backwards along the cutout 115 during operation, ie while the drum is rotating at an operating speed, without touching the cutout in the drum wall 110. For this purpose, the radial depth of the oblique cutouts against the direction of rotation U becomes increasingly smaller with increasing distance from the respective opening 800 and becomes zero in front of the next opening 800 in the circumferential direction (backwards).

Die Drehmomentübertragungskontur 5 weist eine nichtzylindrische Geometrie auf. Hier ist sie vorteilhaft als am Ende im Querschnitt im Wesentlichen abgeflachter rechteckiger Ansatz 2c ausgebildet, der sich an den zylindrischen Abschnitt 2b anschließt. Im Querschnitt betrachtet, sind an den Enden quasi Kreissehnen aus einer gedachten Zylindergeometrie ausgespart worden, deren gerade Grundseiten bzw. Langseiten 5a, 5b parallel zueinander liegen. Diese Grundseiten bilden die längeren Seiten der Mehreckkontur bzw. hier der Rechteckkontur des Ansatzes 2c. Die beiden weiteren Seiten sind die Kurzseiten 5c und 5d der Rechteckkontur des Ansatzes 2c.The torque transmission contour 5 has a non-cylindrical geometry. Here it is advantageously designed as a rectangular extension 2c which is essentially flattened in cross section at the end and which adjoins the cylindrical section 2b. Viewed in cross section, circular chords have been cut out at the ends from an imaginary cylinder geometry, the straight base sides or long sides 5a, 5b of which are parallel to one another. These basic sides form the longer sides of the polygonal contour or here the rectangular contour of attachment 2c. The two other sides are the short sides 5c and 5d of the rectangular contour of the attachment 2c.

Im Übergangsbereich von den Langseiten 5a, 5b zu dem zylindrischen Abschnitt 2b hin sind an den Langseiten 5a, 5b abgerundete Flächen ausgebildet, die sich nach außen zu dem zylindrischen Abschnitt 2b aufweiten. Vorzugsweise ist vorgesehen, dass der Ansatz ausgehend von dem mehreckigen, insbesondere rechteckigen Querschnitt über abgerundete Flächen mit einem Radius R1 größer als 1,0 mm, insbesondere mehr als 2 mm in den zylindrischen Abschnitt des Düsenkörpers übergeht.In the transition area from the long sides 5a, 5b to the cylindrical section 2b, rounded surfaces are formed on the long sides 5a, 5b, which widen outwards to the cylindrical section 2b. It is preferably provided that, starting from the polygonal, in particular rectangular cross-section, rounded portions with a radius R1 greater than 1.0 mm, in particular more than 2 mm, merge into the cylindrical section of the nozzle body.

Die Radien R1 sind hier vorteilhaft so bemessen, dass sie so groß sind wie der maximale Abstand der parallelen Grundseiten 5a, 5b der Drehmomentübertragungskontur 5 zum Außenumfang des zylindrischen Abschnitts 2b, welcher einen größeren Querschnitt aufweist als der Ansatz 2c.The radii R1 are advantageously dimensioned here such that they are as large as the maximum distance between the parallel base sides 5a, 5b of the torque transmission contour 5 and the outer circumference of the cylindrical section 2b, which has a larger cross section than the shoulder 2c.

Ausgehend von einem Ende des zylindrischen Abschnitts 2b des Düsenkörpers 2 ist es somit bevorzugt, dass ein Übergangsbereich zum Drehmomentübertragungsabschnitt 5 mit großen bzw. sich nach außen öffnenden Radien R1 geschaffen wird. Denn derartige Radien R1 neigen deutlich weniger zur Verschmutzung oder Anhaftung als Hinterschnitte oder dgl. Es wird insofern eine nur kaum bzw. nicht zu Verschmutzungen oder Anhaftungen neigende Drehmomentübertragungskontur 5 geschaffen, welche gut hygienisch reinigbar ist.Starting from one end of the cylindrical section 2b of the nozzle body 2, it is therefore preferred that a transition region to the torque transmission section 5 is created with large or outwardly opening radii R1. This is because such radii R1 have a significantly lower tendency to become soiled or clingy than undercuts or the like. In this respect, a torque transmission contour 5 which is only slightly or not at all soiling or clinging is created, which is easy to clean hygienically.

Die eine der Kurzseiten - die Kurzseite 5d - der Drehmomentübertragungskontur 5 ist als eine Schrägfläche ausgebildet. Die Schrägfläche ist an der im Betrieb bei Drehungen der Separatortrommel 100 nach hinten gegen die Drehrichtung U gerichteten Kurzseite 5d ausgebildet. Die Öffnung 4c des Austrittskanals 4 liegt im Bereich dieser Schrägfläche. Vorzugsweise liegt sie in der radial äußeren Hälfte der Schrägfläche bzw. der Kurzseite 5d. Die Schrägfläche 5d ist weiter vorzugsweise senkrecht zur Axialrichtung des Austrittskanals 3 ausgerichtet.One of the short sides - the short side 5d - of the torque transmission contour 5 is designed as an inclined surface. The inclined surface is formed on the short side 5d directed backwards against the direction of rotation U during operation of the separator drum 100. The opening 4c of the outlet channel 4 lies in the region of this inclined surface. It is preferably in the radially outer half of the inclined surface or the short side 5d. The inclined surface 5d is further preferably oriented perpendicular to the axial direction of the outlet channel 3.

Zur Montage und Demontage der Auslassdüse 1 dient ein Montagewerkzeug 10 (Siehe Fig. 2a). Das Montagewerkzeug 10 ist zweistückig ausgestaltet. Es weist einen drehbaren Steckschlüssel 11 auf und eine über den Steckschlüssel 11 steckbare Hülse 12.An assembly tool 10 is used to assemble and disassemble the outlet nozzle 1 (see Fig. 2a ). The assembly tool 10 is configured in two parts. It has a rotatable socket wrench 11 and a sleeve 12 which can be inserted via the socket wrench 11.

Der Steckschlüssel 11 des Montagewerkzeugs 10 weist eine zur Drehmomentübertragungskontur 5 der Auslassdüse 1 komplementäre Drehmomentübertragungskontur 13 auf, die hier als ein Schlitz ausgebildet ist. Der Steckschlüssel ist im Bereich des Schlitzes auf die Drehmomentübertragungskontur 5 aufsetzbar. Der Schlitz ist derart geformt, dass er so formschlüssig auf die komplementäre Drehmomentübertragungskontur 5 der Auslassdüse aufsetzbar ist, dass ein Eindrehen und Herausdrehen der Auslassdüse 5 in die Auslassöffnung 800 hinein und aus der Auslassöffnung 800 heraus realisierbar ist. An das Montagemaul 13 schließt sich eine Art Stab bzw. Welle 14 an, an deren von der Drehmomentübertragungskontur 13 abgewandten Ende wiederum ein Griff oder ein Ansatz für ein weiteres Werkzeug vorgesehen ist (hier nicht dargestellt), um den Steckschlüssel 11 drehen zu können.The socket wrench 11 of the assembly tool 10 has a torque transmission contour 13 which is complementary to the torque transmission contour 5 of the outlet nozzle 1 and is designed here as a slot. The socket wrench can be placed on the torque transmission contour 5 in the area of the slot. The slot is shaped in such a way that it can be positively placed on the complementary torque transmission contour 5 of the outlet nozzle in such a way that the outlet nozzle 5 can be screwed in and out into the outlet opening 800 and out of the outlet opening 800. The assembly mouth 13 is followed by a type of rod or shaft 14, on the end of which, facing away from the torque transmission contour 13, is in turn a handle or an attachment for another tool (not shown here) in order to be able to turn the socket wrench 11.

Um das Montieren und Demontieren der Auslassdüse 1 zu erleichtern (beispielsweise in einer eher schwer zugänglichen Haube, welche die Zentrifugentrommel 100 umgibt), ist vorgesehen, dass über den Steckschlüssel 11 die Hülse 12 geschoben wird, deren Innendurchmesser so bemessen ist, dass die Auslassdüse 1 an dem Dichtring 6b im Ende des Rohres verliersicher festklemmbar ist. Derart kann die Hülse 12 mit der festgeklemmten Auslassdüse 1 zur Montage bis kurz vor die Öffnung 800 der Trommelwand 110 geführt werden. Sodann wird mit dem Steckschlüssel der Düsenkörper 2 in die Auslassöffnung 800 eingeschraubt. Die Hülse 12 und die Auslassöffnung 800 können komplementäre konische Einführabschnitte aufweisen, die derart gestaltet sind, dass sie es erlauben, dass das Ende der Hülse 12 in das Ende der Auslassöffnung 800 eingreifen kann.In order to facilitate the assembly and disassembly of the outlet nozzle 1 (for example in a hood which is rather difficult to access and which surrounds the centrifuge drum 100), it is provided that the sleeve 12 is pushed over the socket wrench 11, the inside diameter of which is dimensioned such that the outlet nozzle 1 can be locked captively on the sealing ring 6b in the end of the tube. In this way, the sleeve 12 with the clamped outlet nozzle 1 can be guided for assembly until shortly before the opening 800 of the drum wall 110. The nozzle body 2 is then screwed into the outlet opening 800 using the socket wrench. The sleeve 12 and the outlet opening 800 may have complementary conical insertion sections that are designed to allow the end of the sleeve 12 to engage the end of the outlet opening 800.

Zum Lösen der Auslassdüse 1 wird das Ende der Hülse 12 in das radial äußere Ende der (vorzugsweise am Ende mit einer kurzen, das Einführen der Hülse 12 erleichternden Trichtergeometrie versehenen) Auslassöffnung 800 in der Trommelwand 110 eingesteckt und dort mit einer vorgegebenen Kraft gehalten. Sodann wird mit dem Steckschlüssel 11 die Auslassdüse 1 losgeschraubt, bis beim Herausdrehen der Dichtring 6b der Auslassdüse 1 in die Hülse 12 hineingleitet, da die Hülse 12 mit einer vorgegebenen Kraft in die Öffnung 800 (oder an die Öffnung 800) gepresst wird. Jetzt kann die Auslassdüse 1 ganz aus der Auslassöffnung herausgeschraubt werden und schließlich im Rohr 12 aus dem die Zentrifugentrommel 100 umgebenden Raum entfernt bzw. herausgenommen werden.To release the outlet nozzle 1, the end of the sleeve 12 is inserted into the radially outer end (preferably provided at the end with a short funnel geometry that facilitates the insertion of the sleeve 12) into the drum wall 110 and held there with a predetermined force. The outlet nozzle 1 is then unscrewed with the socket wrench 11 until, when the sealing ring 6b of the outlet nozzle 1 is unscrewed, it slides into the sleeve 12, since the sleeve 12 is pressed into the opening 800 (or the opening 800) with a predetermined force. The outlet nozzle 1 can now be completely screwed out of the outlet opening and finally removed or removed in the tube 12 from the space surrounding the centrifuge drum 100.

Derart sind die Montage und die Demontage der Auslassdüse 1 in die Zentrifugentrommel 100 baulich einfach möglich.In this way, the assembly and disassembly of the outlet nozzle 1 in the centrifuge drum 100 is structurally simple.

BezugszeichenReference numerals

AuslassdüseOutlet nozzle
11
DüsenkörperNozzle body
22nd
AbschnitteSections
2a, 2b2a, 2b
Ansatzapproach
2c2c
EinlasskanalInlet duct
33rd
EinlassöffnungInlet opening
3a3a
sich verjüngender Abschnitttapered section
3b3b
zylindrischer Abschnittcylindrical section
3c3c
KanalendeChannel end
3d3d
AuslasskanalExhaust duct
44th
EintrittsöffnungEntrance opening
4a4a
zylindrischer Abschnittcylindrical section
4b4b
AustrittsöffnungOutlet opening
4c4c
DrehmomentübertragungskonturTorque transmission contour
55
GrundseitenBasic pages
5a, 5b5a, 5b
KurzseitenShort pages
5c, 5d5c, 5d
DichtungenSeals
66
Gewindethread
77
MontagewerkzeugAssembly tool
1010th
SteckschlüsselSocket wrench
1111
HülseSleeve
1212th
DrehmomentübertragungskonturTorque transmission contour
1313
Wellewave
1414
SeparatortrommelSeparator drum
100100
TrommelwandDrum wall
110110
AusfräsungMilling
115115
SchleuderraumSpin room
200200
TrenntellerstapelSeparator plate stack
300300
TrenntellerSeparating plate
400400
ZulaufrohrInlet pipe
500500
VerteilerschaftDistribution body
600600
VerteilerkanäleDistribution channels
700700
AustrittsöffnungenOutlet openings
800800
AbläufeProcesses
900900
EinsatzstückeInserts
950950
ZwischenräumeGaps
960960
RadienRadii
R, R1R, R1
Winkelangle
Alphaalpha
AustrittsrichtungExit direction
AA
DrehachseAxis of rotation
DD
DrehrichtungDirection of rotation
UU

Claims (9)

  1. An outlet nozzle (1) for centrifugal drums (100),
    a. comprising a nozzle body (2), which has at least one cylindrical portion and a protrusion (2c) adjoining the nozzle body,
    b. wherein in the nozzle body (2) are configured an inlet channel (3) and an outlet channel (4) oriented at an angle thereto, and
    c. wherein the protrusion (2c) is provided with a torque transmitting contour (5) for the application of a tool having a complementarily configured tool/torque transmitting contour (13), in order to fasten the nozzle body (2) rotatingly in an opening (800) of a rotatable centrifugal drum (100) and release the same,
    wherein
    d. the protrusion (2c) has a polygonal, in particular a rectangular cross section, which is smaller than the cross section of the cylindrical portion, characterized
    e. in that the protrusion (2c), starting from the polygonal, in particular rectangular cross section, merges into the cylindrical portion (2b) of the nozzle body (2) via rounded surfaces having a radius (R1) larger than 1.0 mm.
  2. The outlet nozzle (1) as claimed in claim 1, characterized in that the protrusion (2c), starting from the polygonal, in particular a rectangular cross section, merges into the cylindrical portion (2b) of the nozzle body (2) via rounded surfaces having a radius (R1) larger than 2.0 mm.
  3. The outlet nozzle (1) as claimed in one of the preceding claims, characterized in that the inlet channel (3) and the outlet channel (4) is oriented at an obtuse angle to each other.
  4. The outlet nozzle (1) as claimed in one of the preceding claims, characterized in that an exit end (4c) of the outlet channel (4) is configured in the region of the protrusion (2c).
  5. The outlet nozzle (1) as claimed in one of the preceding claims, characterized in that the exit end (4c) of the outlet channel (4) is configured in an outer radial region, in particular in the radial outer half, of the protrusion (2c).
  6. The outlet nozzle (1) as claimed in one of the preceding claims, characterized in that this is sealed with two or more seals (6a, 6b) against the inner circumference of the opening (800) in the drum wall (110).
  7. The outlet nozzle (1) as claimed in one of the preceding claims, characterized in that the two or more seals (6a, 6b) are positioned in such a way on the outlet nozzle that, when the outlet nozzle is installed, only short and easily cleanable gaps to the outer contour of the drum wall (110) or to the interspace (960) are formed.
  8. A centrifugal drum having a drum wall (110) which has a plurality of circumferentially distributed openings (800) for the insertion of outlet nozzles (1), characterized in that one or more of the outlet nozzles (1) are configured according to one of claims 1 to 7.
  9. The centrifugal drum as claimed in claim 8, characterized in that, respectively counter to the rotational direction (U) in the backward direction on the outside of the drum wall (110), behind the openings (800), is respectively configured a notch, in particular a milled recess (115), in the drum wall (110).
EP17716815.0A 2016-04-29 2017-04-04 Outlet nozzle for a centrifugal drum, centrifugal drum and assembly tool Active EP3448577B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL17716815T PL3448577T3 (en) 2016-04-29 2017-04-04 Outlet nozzle for a centrifugal drum, centrifugal drum and assembly tool

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016108057.8A DE102016108057B4 (en) 2016-04-29 2016-04-29 Outlet nozzle for a centrifuge drum, centrifuge drum and assembly tool
PCT/EP2017/057947 WO2017186459A1 (en) 2016-04-29 2017-04-04 Outlet nozzle for a centrifugal drum, centrifugal drum and assembly tool

Publications (2)

Publication Number Publication Date
EP3448577A1 EP3448577A1 (en) 2019-03-06
EP3448577B1 true EP3448577B1 (en) 2020-03-18

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US (2) US11020754B2 (en)
EP (1) EP3448577B1 (en)
DE (1) DE102016108057B4 (en)
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WO (1) WO2017186459A1 (en)

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DE102016108057B4 (en) * 2016-04-29 2018-08-02 Gea Mechanical Equipment Gmbh Outlet nozzle for a centrifuge drum, centrifuge drum and assembly tool
DE102018119620A1 (en) * 2018-08-13 2020-02-13 Flottweg Se Outlet nozzle for a centrifuge drum, nozzle insert, centrifuge drum, assembly tool and method for assembling an outlet nozzle
US12017331B2 (en) 2021-01-06 2024-06-25 Techtronic Cordless Gp Tool for powered sprayer

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Also Published As

Publication number Publication date
DE102016108057A1 (en) 2017-11-02
EP3448577A1 (en) 2019-03-06
PL3448577T3 (en) 2020-08-24
DE102016108057B4 (en) 2018-08-02
NZ746115A (en) 2024-03-22
US11701669B2 (en) 2023-07-18
WO2017186459A1 (en) 2017-11-02
US11020754B2 (en) 2021-06-01
US20210178407A1 (en) 2021-06-17
US20200023384A1 (en) 2020-01-23

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