EP3427937A1 - Conical worm of a conical worm separator - Google Patents
Conical worm of a conical worm separator Download PDFInfo
- Publication number
- EP3427937A1 EP3427937A1 EP18181313.0A EP18181313A EP3427937A1 EP 3427937 A1 EP3427937 A1 EP 3427937A1 EP 18181313 A EP18181313 A EP 18181313A EP 3427937 A1 EP3427937 A1 EP 3427937A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- screw
- reinforcing element
- worm
- longitudinal axis
- wing
- 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
Links
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 85
- 238000000034 method Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000010146 3D printing Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 210000002414 leg Anatomy 0.000 description 20
- 230000007704 transition Effects 0.000 description 11
- 230000010006 flight Effects 0.000 description 6
- 210000001364 upper extremity Anatomy 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 210000000689 upper leg Anatomy 0.000 description 2
- 241000237858 Gastropoda Species 0.000 description 1
- 241000209035 Ilex Species 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 239000010871 livestock manure Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000010841 municipal wastewater Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B9/00—Presses specially adapted for particular purposes
- B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
- B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
- B30B9/121—Screw constructions
-
- 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
- B01F27/05—Stirrers
- B01F27/051—Stirrers characterised by their elements, materials or mechanical properties
- B01F27/052—Stirrers with replaceable wearing elements; Wearing elements therefor
Definitions
- the invention relates to a screw, which is used in particular in press screw separators.
- the worm has reinforcing elements on the worm wings. Furthermore, the invention relates to a method for producing the screw.
- Press screw separators are for example in DE 20 2012 011 864 U1 and DE 20 2012 008 077 U1 described.
- DE 42 14 217 A1 shows angular reinforcing elements, here referred to as wear elements, on the wings of the screw of a press screw separator.
- the invention is achieved by a screw.
- This screw is used in particular in a press screw separator.
- a press screw separator is for example in DE 20 2012 011 864 U1 and DE 20 2012 008 077 U1 described.
- the screw extruder comprises a sieve.
- the screw In the sieve, the screw is arranged and is rotated by means of a drive in rotation. Alternatively, the screw can be fixed and the screen set in rotation.
- the press screw separator is a slurry, such as manure, municipal wastewater or industrial wastewater fed. Along the snail, the turbid is squeezed out. Liquid components of the pulp pass through the sieve radially outwards and flow off.
- a plug of solid forms. This plug is usually held with a discharge regulator.
- the area facing the plug and the radial side of the at least one worm wing are subject to a relatively high mechanical stress and corresponding wear.
- the screw according to the invention comprises a soul.
- the soul extends along a longitudinal axis. Perpendicular to the longitudinal axis, a radial direction is defined. Around the longitudinal axis, a circumferential direction is defined.
- the worm comprises at least one worm wing.
- two or three worm wings can be arranged on the soul.
- the at least one worm wing is wound in the circumferential direction and along the longitudinal axis around the soul.
- the worm wing can also be called a worm spiral.
- a front axial side points forward with respect to the conveying direction of the worm.
- the front axial side is a rear axial side.
- the two axial sides are connected to each other via a relatively narrow radial side.
- the radial side is substantially perpendicular to the radial direction.
- the front axial side and the radial side are subject to the relatively high mechanical stress and wear. Therefore, the document shows DE 42 14 217 A1 angular wear elements that cover the front axial side and the radial side.
- At least one reinforcing element preferably on each screw wing, several of the reinforcing elements are used.
- the configuration of a single reinforcing element will be described in each case.
- several of the reinforcing elements can be used in succession on a worm wing without any problem.
- the single reinforcing element has a U-shaped cross-section.
- the reinforcing member is applied to the radial side of the worm wing, so that a front leg of the U-shape on the front axial side and a rear leg of the U-shape abut the rear axial side of the worm wing; the two legs of the U-shape connecting portion of the reinforcing element covers the radial side of the screw flight.
- the reinforcing element is positively secured in both directions perpendicular to the axial sides of the worm wing.
- the U-shape basically includes all cross-sectional shapes with two opposing, connected legs, such as a C-shape or V-shape. However, it is particularly preferred that the two legs are parallel to each other.
- the reinforcing element and the worm wing are formed so that the reinforcing element on the worm wing only alswindbar and not in the radial direction can be plugged.
- the unwinding of the reinforcing element takes place from the end of the auger blade along the turn of the auger wing.
- the reinforcing element is arranged with respect to the radial direction form-fitting manner on the worm wing.
- the geometric configuration of the worm wing and / or the pitch of the worm wing and / or the geometric configuration of the reinforcing element cause the reinforcing element auffanbar only on the worm wing and not plugged in the radial direction.
- the positive connection between the reinforcing element and screw flights with respect to the radial direction is achieved in that the reinforcing element extends over a relatively large angle ⁇ .
- This angle ⁇ is measured about the longitudinal axis and in a plane perpendicular to the longitudinal axis. If the reinforcing element extends, for example, by half a turn of the worm wing, the angle ⁇ is 180 °.
- the angle ⁇ over which the individual reinforcing element extends is at least 30 °, preferably at least 45 °, more preferably at least 60 °, particularly preferably at least 90 °. Furthermore, embodiments are also possible in which the angle ⁇ is at least 120 °, preferably at least 150 °.
- the two legs of the reinforcing element are formed so that they do not undercut the worm wing.
- This is achieved for example by a cross section in which the two legs are parallel to each other or by a V-shape.
- the positive connection is achieved in the radial direction only by the described, relatively large angle ⁇ and not by an undercut between the reinforcing element and the worm wing.
- the receiving area for the reinforcing element on the screw wing may have a simple geometry with flat surfaces.
- the single reinforcing element is made in one piece.
- one-piece manufacturing is meant that the reinforcing element is not composed of several components.
- the reinforcing element is preferably made by machining from the solid or by primary molding. The original forming production preferably takes place by casting, 3D printing or sintering.
- the "3D printing” includes all additive manufacturing processes, such as powder bed processes, free space processes, liquid metal processes or other layer construction processes.
- additive manufacturing processes such as powder bed processes, free space processes, liquid metal processes or other layer construction processes.
- the green compact of the reinforcing element can be produced in a conventional manner or also with 3D printing.
- a reinforcing element is preferably formed as a transition element. This transition element is first turned on the screw wing.
- the transition member has a tapered portion such that the portion of the flight wing formed by the reinforcing members passes into the unreinforced portion of the flight wing without any appreciable edge.
- a reinforcing element is preferably designed as a closing element. This final element is last turned on the auger wing.
- the closing element preferably comprises a stop side, which rests against the end of the worm wing and reinforces the worm wing in this area.
- At least one reinforcing element is preferably designed as an intermediate element.
- the intermediate element is located on the worm wing between the transition element and the end element.
- the transition element and the closing element and several of the intermediate elements can be arranged.
- a sleeve is pushed onto the core of the screw and secured.
- the sleeve abuts the foremost reinforcing element (closing element) and thus prevents a twisting or loosening of this reinforcing element in the circumferential direction.
- All other reinforcing elements are secured by their positive engagement with the respective further forward reinforcing element against twisting or loosening in the circumferential direction.
- the reinforcing element is preferably made of hard metal and / or hard ceramic.
- the sintered reinforcing member is made of a ceramic hard material such as tungsten carbide and a tough matrix of cobalt and nickel or iron.
- the invention further comprises a method for producing a screw.
- the screw is especially designed for use in a screw extruder.
- the process produces the already described screw.
- a provision of the soul takes place, wherein on the soul at least one Schneckeneriel is arranged.
- At least one reinforcing element is turned on on this screw wing.
- the reinforcing element has the described U-shaped cross-section. The turning takes place along the longitudinal axis and in the circumferential direction.
- the at least one reinforcing element is produced in one piece, preferably in a 3D printing.
- a green compact of the reinforcing element is produced.
- the green body is preferably produced in a 3D print.
- the green compact is sintered to form the reinforcing element.
- the green compact is wound on the screw wing as described and then sintered on the screw wing.
- all the reinforcing elements used are first turned on the worm wing and then sintered all reinforcing elements together.
- the invention further comprises a press screw separator with one of the described screws or with a screw, produced by a method described here.
- FIGS. 1 to 7 show a screw 1 or details of the screw 1 of a press screw separator 100th
- the screw extruder 100 comprises a housing 101, which in FIG. 1 partially broken away.
- a drive 102 is flanged with electric motor and gearbox.
- a cylindrical sieve 106 In the housing 101 is a cylindrical sieve 106. Through the housing 101 and the sieve 106 extends the screw 1.
- the screw 1 is connected to the drive 102, so that the screw 1 can be set in rotation.
- an inlet 103 is formed in the housing 101 for the slurry.
- a drain 105 Radially outside the screen 106 is a drain 105 for passing through the screen 106 to the outside liquid components of the pulp.
- the worm 1 comprises a core 2 and two worm wings 3 wound around the core 2.
- a discharge regulator 104 is located on the housing 101.
- the core 2 has a region without worm wings 3 which extends into this discharge regulator 104.
- a plug of the solids of the slurry forms.
- the core 2 extends along a longitudinal axis 30 of the screw 1. Perpendicular to the longitudinal axis 30, a radial direction 31 is defined. Around the longitudinal axis 30 around a circumferential direction 32 is defined. Along the longitudinal axis 30 and in the circumferential direction 32, the screw vanes 3 are wound. The pitch of the screw 1 results from the distance between the two screw flights 3, parallel to the longitudinal axis 30.
- the two worm wings 3 each have a reinforced area, which is formed by a plurality of reinforcing elements 4.
- a reinforcing element 4 is formed as a final element 10, a reinforcing element 4 formed as a transition element 15 and a plurality of reinforcing elements 4, formed as intermediate elements fourteenth
- FIGS. 5 to 7 show these three different types of reinforcing elements 4.
- Each of the figures shows a respective reinforcing element 4 of the one worm wing 3 and the other worm wing 3. den FIGS. 5 to 7 It can be seen that the reinforcing elements 4 each have a U-shaped cross-section. This cross section is formed by a front leg 8, a rear leg 9 and a region connecting the two legs 8, 9 together.
- Each reinforcing element 4 is made in one piece, for example by casting, sintering or 3D printing.
- the worm wings 3 each comprise a front axial side 5 which faces the discharge regulator 104, an opposite rear axial side 6 and a radial side 7.
- the radial side 7 of the worm wings 3 faces radially outwards and thus towards the sieve 106.
- the front leg 8 abuts against the front axial side 5.
- the rear leg 9 abuts against the rear axial side 6.
- the transition region between the two legs 8, 9 covers the radial side 7 and is preferably located on the radial side 7.
- FIGS. 5 to 7 show, the two legs 8, 9 of the U-shape are arranged parallel to each other. There are no undercuts that would hold the respective reinforcing element 4 with respect to the radial direction 31 positively on the worm wing 3.
- the reinforcing elements 4 extend over a relatively large length along the helical screw flights 3.
- the angle ⁇ is defined.
- FIG. 3 shows a schematic view of the screw 1 in a plane perpendicular to the longitudinal axis 30 level. In this illustration, it can be seen that the single reinforcing element 4, as a one-piece component, extends over the angle ⁇ . In the illustrated embodiment, the angle ⁇ is 90 °.
- reinforcing element 4 formed as a transition element 15, has a tapered portion 16.
- the reinforcing element 4 merges without edge into the non-reinforced region of the worm wing 3.
- reinforcing element 4 designed as a closure element 10
- This stop side 11 covers the end of the worm wing 3.
- the stop side 11 extends from the core 2 to the radial end of the worm wing 3.
- FIG. 4 shows a sleeve 12, as shown in FIG. 2 , on the soul 2 is attached.
- the sleeve 12 has in each case a blocking edge 13 for the two worm wings 3. This blocking edge 13 bears against the closing element 10.
- the sleeve 12 is fixedly connected to the core 2, for example via a press or transition fit. As a result, the sleeve 12 prevents the reinforcing elements 4 from rotating or loosening along the circumferential direction 32.
- FIGS. 5 to 7 show further that the front leg 8 has on its outer side a first leg length 33 and the rear leg 9 on its outer side a second leg length 34.
- the two leg lengths 33, 34 are measured parallel to the radial direction 31.
- the first leg length 33 is greater than the second leg length 34.
- the front axial side 5 is primarily reinforced.
- FIG. 5 shows a third length 35, also parallel to the radial direction 31.
- the stop side 11 towards the first leg length 33 increases up to this third length 35, so that the front leg 8 merges into the stop side 11.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Centrifugal Separators (AREA)
- Cyclones (AREA)
- Treatment Of Sludge (AREA)
- Gears, Cams (AREA)
Abstract
Die Erfindung betrifft eine Schnecke (1), insbesondere eines Pressschneckenseparators, umfassend eine Seele (2), die sich entlang einer Längsachse (30) erstreckt, wobei senkrecht zur Längsachse (30) eine Radialrichtung (31) und um die Längsachse (30) eine Umfangsrichtung (32) definiert sind, zumindest einen auf der Seele (2) angeordneten und in Umfangsrichtung (32) gewundenen Schneckenflügel (3), wobei am Schneckenflügel (3) bezüglich der Längsachse (30) eine vordere Axialseite (5), eine hintere Axialseite (6) und eine Radialseite (7) definiert sind, und zumindest ein Verstärkungselement (4) mit U-förmigem Querschnitt, das auf der Radialseite (7) des Schneckenflügels (3) aufgebracht ist, wobei die beiden Schenkel (8, 9) der U-Form an der vorderen Axialseite (5) und der hinteren Axialseite (6) anliegen. The invention relates to a screw (1), in particular a press screw separator, comprising a core (2) extending along a longitudinal axis (30), wherein a radial direction (31) perpendicular to the longitudinal axis (30) and a longitudinal axis (30) Peripheral direction (32) are defined, at least one arranged on the core (2) and in the circumferential direction (32) spiraled worm wing (3), wherein the worm wing (3) with respect to the longitudinal axis (30) has a front axial side (5), a rear axial side (6) and a radial side (7) are defined, and at least one reinforcing element (4) with U-shaped cross-section, which is applied to the radial side (7) of the screw flight (3), wherein the two legs (8, 9) of the U-shape on the front axial side (5) and the rear axial side (6) abut.
Description
Die Erfindung betrifft eine Schnecke, die insbesondere in Pressschneckenseparatoren verwendet wird. Die Schnecke weist Verstärkungselemente auf den Schneckenflügeln auf. Des Weiteren betrifft die Erfindung ein Verfahren zum Herstellen der Schnecke.The invention relates to a screw, which is used in particular in press screw separators. The worm has reinforcing elements on the worm wings. Furthermore, the invention relates to a method for producing the screw.
Pressschneckenseparatoren sind beispielsweise in
Es ist eine Aufgabe der Erfindung, eine Schnecke mit Verstärkungselementen anzugeben, wobei die Verstärkungselemente einfach herstellbar und sicher auf den Schneckenflügeln montierbar sein sollen.It is an object of the invention to provide a screw with reinforcing elements, wherein the reinforcing elements should be easy to manufacture and safe to be mounted on the screw flights.
Die Lösung dieser Aufgabe erfolgt durch die Merkmale der unabhängigen Ansprüche. Die abhängigen Ansprüche haben vorteilhafte Ausgestaltungen der Erfindung zum Gegenstand.The solution of this object is achieved by the features of the independent claims. The dependent claims relate to advantageous embodiments of the invention.
Somit wird die Erfindung gelöst durch einen Schnecke. Diese Schnecke wird insbesondere in einem Pressschneckenseparator verwendet. Solch ein Pressschneckenseparator ist beispielsweise in
Der Pressschneckenseparator umfasst ein Sieb. In dem Sieb ist die Schnecke angeordnet und wird mittels eines Antriebs in Rotation versetzt. Alternativ hierzu kann auch die Schnecke feststehen und das Sieb in Rotation versetzt werden. Dem Pressschneckenseparator wird eine Trübe, beispielsweise Gülle, kommunale Abwässer oder industrielle Abwässer, zugeführt. Entlang der Schnecke wird die Trübe ausgepresst. Flüssige Bestandteile der Trübe treten durch das Sieb radial nach außen und fließen ab. Am Ende der Schnecke bildet sich ein Pfropfen aus Feststoff. Dieser Pfropfen wird üblicherweise mit einem Ausstoßregler gehalten. Insbesondere der dem Pfropfen zugewandte Bereich und die Radialseite des zumindest einen Schneckenflügels unterliegen einer relativ hohen mechanischen Beanspruchung und entsprechendem Verschleiß.The screw extruder comprises a sieve. In the sieve, the screw is arranged and is rotated by means of a drive in rotation. Alternatively, the screw can be fixed and the screen set in rotation. The press screw separator is a slurry, such as manure, municipal wastewater or industrial wastewater fed. Along the snail, the turbid is squeezed out. Liquid components of the pulp pass through the sieve radially outwards and flow off. At the end of the screw, a plug of solid forms. This plug is usually held with a discharge regulator. In particular, the area facing the plug and the radial side of the at least one worm wing are subject to a relatively high mechanical stress and corresponding wear.
Die erfindungsgemäße Schnecke umfasst eine Seele. Die Seele erstreckt sich entlang einer Längsachse. Senkrecht zur Längsachse ist eine Radialrichtung definiert. Um die Längsachse herum ist eine Umfangsrichtung definiert.The screw according to the invention comprises a soul. The soul extends along a longitudinal axis. Perpendicular to the longitudinal axis, a radial direction is defined. Around the longitudinal axis, a circumferential direction is defined.
Ferner umfasst die Schnecke zumindest einen Schneckenflügel. Insbesondere können auch zwei oder drei Schneckenflügel auf der Seele angeordnet werden. Der zumindest eine Schneckenflügel ist in Umfangsrichtung und entlang der Längsachse um die Seele gewunden. Der Schneckenflügel kann auch als Schneckenwendel bezeichnet werden.Furthermore, the worm comprises at least one worm wing. In particular, two or three worm wings can be arranged on the soul. The at least one worm wing is wound in the circumferential direction and along the longitudinal axis around the soul. The worm wing can also be called a worm spiral.
Zur Beschreibung vorliegender Erfindung sind an dem Schneckenflügel folgende Seiten definiert: eine vordere Axialseite weist bezüglich der Förderrichtung der Schnecke nach vorne. Gegenüber der vorderen Axialseite liegt eine hintere Axialseite. Die beiden Axialseiten sind über eine relativ schmale Radialseite miteinander verbunden. Die Radialseite steht im Wesentlichen senkrecht zur Radialrichtung. Bei der Verwendung der Schnecke im Pressschneckenseparator ist die Radialseite dem Sieb zugewandt; die vordere Axialseite ist dem Ausstoßregler zugewandt.For the description of the present invention, the following sides are defined on the worm wing: a front axial side points forward with respect to the conveying direction of the worm. Opposite the front axial side is a rear axial side. The two axial sides are connected to each other via a relatively narrow radial side. The radial side is substantially perpendicular to the radial direction. When using the screw in the press screw separator, the radial side faces the screen; the front axial side faces the discharge regulator.
Insbesondere die vordere Axialseite und die Radialseite unterliegen der relativ hohen mechanischen Beanspruchung und dem Verschleiß. Deshalb zeigt die Druckschrift
Erfindungsgemäß wird zumindest ein Verstärkungselement, vorzugsweise auf jedem Schneckenflügel mehrere der Verstärkungselemente, verwendet. Der Einfachheit halber wird jeweils die Ausgestaltung eines einzelnen Verstärkungselements beschrieben. Allerdings können ohne weiteres mehrere der Verstärkungselemente hintereinander auf einem Schneckenflügel verwendet werden.According to the invention, at least one reinforcing element, preferably on each screw wing, several of the reinforcing elements are used. For the sake of simplicity, the configuration of a single reinforcing element will be described in each case. However, several of the reinforcing elements can be used in succession on a worm wing without any problem.
Das einzelne Verstärkungselement weist einen U-förmigen Querschnitt auf. Das Verstärkungselement ist auf die Radialseite des Schneckenflügels aufgebracht, sodass ein vorderer Schenkel der U-Form an der vorderen Axialseite und ein hinterer Schenkel der U-Form an der hinteren Axialseite des Schneckenflügels anliegen; der die beiden Schenkel der U-Form verbindende Anteil des Verstärkungselements überdeckt die Radialseite des Schneckenflügels. Durch diese U-Form ist das Verstärkungselement in beide Richtungen senkrecht zu den Axialseiten des Schneckenflügels formschlüssig befestigt.The single reinforcing element has a U-shaped cross-section. The reinforcing member is applied to the radial side of the worm wing, so that a front leg of the U-shape on the front axial side and a rear leg of the U-shape abut the rear axial side of the worm wing; the two legs of the U-shape connecting portion of the reinforcing element covers the radial side of the screw flight. By this U-shape, the reinforcing element is positively secured in both directions perpendicular to the axial sides of the worm wing.
Die U-Form umfasst grundsätzlich alle Querschnittsformen mit zwei gegenüberliegenden, verbundenen Schenkeln, so beispielsweise auch eine C-Form oder V-Form. Besonders bevorzugt ist jedoch vorgesehen, dass die beiden Schenkel parallel zueinander liegen.The U-shape basically includes all cross-sectional shapes with two opposing, connected legs, such as a C-shape or V-shape. However, it is particularly preferred that the two legs are parallel to each other.
Besonders bevorzugt ist vorgesehen, dass das Verstärkungselement und der Schneckenflügel so ausgebildet sind, dass das Verstärkungselement auf den Schneckenflügel nur aufdrehbar und nicht in Radialrichtung aufsteckbar ist. Das Aufdrehen des Verstärkungselements erfolgt vom Ende Schneckenflügels entlang der Windung des Schneckenflügels. In dieser Ausgestaltung ist das Verstärkungselement auch bezüglich der Radialrichtung formschlüssig auf dem Schneckenflügel angeordnet.It is particularly preferably provided that the reinforcing element and the worm wing are formed so that the reinforcing element on the worm wing only aufdrehbar and not in the radial direction can be plugged. The unwinding of the reinforcing element takes place from the end of the auger blade along the turn of the auger wing. In this embodiment, the reinforcing element is arranged with respect to the radial direction form-fitting manner on the worm wing.
Insbesondere die geometrische Ausgestaltung des Schneckenflügels und/oder die Steigung des Schneckenflügels und/oder die geometrische Ausgestaltung des Verstärkungselements führen dazu, dass das Verstärkungselement lediglich auf den Schneckenflügel aufdrehbar und nicht in Radialrichtung aufsteckbar ist.In particular, the geometric configuration of the worm wing and / or the pitch of the worm wing and / or the geometric configuration of the reinforcing element cause the reinforcing element aufdrehbar only on the worm wing and not plugged in the radial direction.
Vorzugsweise wird die formschlüssige Verbindung zwischen Verstärkungselement und Schneckenflügel bezüglich der Radialrichtung dadurch erreicht, dass sich das Verstärkungselement über einen relativ großen Winkel α erstreckt. Dieser Winkel α wird um die Längsachse und in einer zur Längsachse senkrechten Ebene gemessen. Erstreckt sich das Verstärkungselement beispielsweise um eine halbe Windung des Schneckenflügels, so beträgt der Winkel α 180 °.Preferably, the positive connection between the reinforcing element and screw flights with respect to the radial direction is achieved in that the reinforcing element extends over a relatively large angle α. This angle α is measured about the longitudinal axis and in a plane perpendicular to the longitudinal axis. If the reinforcing element extends, for example, by half a turn of the worm wing, the angle α is 180 °.
Insbesondere ist vorgesehen, dass der Winkel α, über den sich das einzelne Verstärkungselement erstreckt, zumindest 30°, vorzugsweise zumindest 45°, weiter vorzugsweise zumindest 60°, besonders vorzugsweise zumindest 90°, beträgt. Ferner sind auch Ausführungen möglich, bei denen der Winkel α zumindest 120°, vorzugsweise zumindest 150°, beträgt.In particular, it is provided that the angle α over which the individual reinforcing element extends is at least 30 °, preferably at least 45 °, more preferably at least 60 °, particularly preferably at least 90 °. Furthermore, embodiments are also possible in which the angle α is at least 120 °, preferably at least 150 °.
Besonders bevorzugt sind die beiden Schenkel des Verstärkungselements so ausgebildet, dass sie den Schneckenflügel nicht hinterschneiden. Dies wird beispielsweise durch einen Querschnitt erreicht, bei dem die beiden Schenkel parallel zueinander liegen oder durch eine V-Form. Dadurch wird die formschlüssige Verbindung in Radialrichtung lediglich durch den beschriebenen, relativ großen Winkel α und nicht etwa durch eine Hinterschneidung zwischen Verstärkungselement und Schneckenflügel erreicht. So kann der Aufnahmebereich für das Verstärkungselement am Schneckenflügel eine einfache Geometrie mit ebenen Flächen aufweisen.Particularly preferably, the two legs of the reinforcing element are formed so that they do not undercut the worm wing. This is achieved for example by a cross section in which the two legs are parallel to each other or by a V-shape. As a result, the positive connection is achieved in the radial direction only by the described, relatively large angle α and not by an undercut between the reinforcing element and the worm wing. Thus, the receiving area for the reinforcing element on the screw wing may have a simple geometry with flat surfaces.
Vorzugsweise wird das einzelne Verstärkungselement einteilig gefertigt. Unter "einteiliger Fertigung" ist zu verstehen, dass das Verstärkungselement nicht aus mehreren Bauteilen zusammengesetzt ist. So ist das Verstärkungselement vorzugsweise durch spanende Bearbeitung aus dem Vollen oder durch Urformen gefertigt. Die urformende Fertigung erfolgt vorzugsweise durch Guss, 3D-Druck oder Sintern.Preferably, the single reinforcing element is made in one piece. By "one-piece manufacturing" is meant that the reinforcing element is not composed of several components. Thus, the reinforcing element is preferably made by machining from the solid or by primary molding. The original forming production preferably takes place by casting, 3D printing or sintering.
Der "3D-Druck" umfasst alle additiven Herstellungsverfahren, wie beispielsweise Pulverbettverfahren, Freiraumverfahren, Flüssigmetallverfahren oder andere Schichtbauverfahren. Für das Sintern kann der Grünling des Verstärkungselements auf herkömmliche Weise oder ebenfalls mit 3D-Druck hergestellt werden.The "3D printing" includes all additive manufacturing processes, such as powder bed processes, free space processes, liquid metal processes or other layer construction processes. For sintering, the green compact of the reinforcing element can be produced in a conventional manner or also with 3D printing.
Vorzugsweise werden auf dem einzelnen Schneckenflügel drei unterschiedliche Verstärkungselemente angeordnet. Diese Verstärkungselemente weisen im Wesentlichen die gleichen U-förmigen Querschnitte und vorzugsweise den Winkel α auf:
Ein Verstärkungselement ist vorzugsweise als Übergangselement ausgebildet. Dieses Übergangselement wird zuerst auf den Schneckenflügel aufgedreht. Vorzugsweise weist das Übergangselement einen verjüngten Abschnitt auf, sodass der durch die Verstärkungselemente gebildete Bereich des Schneckenflügels ohne eine nennenswerte Kante in den nicht verstärkten Bereich des Schneckenflügels übergeht.Preferably, three different reinforcing elements are arranged on the single screw wing. These reinforcing elements have substantially the same U-shaped cross-sections and preferably the angle α:
A reinforcing element is preferably formed as a transition element. This transition element is first turned on the screw wing. Preferably, the transition member has a tapered portion such that the portion of the flight wing formed by the reinforcing members passes into the unreinforced portion of the flight wing without any appreciable edge.
Ferner ist ein Verstärkungselement vorzugsweise als Abschlusselement ausgebildet. Dieses Abschlusselement wird zuletzt auf den Schneckenflügel aufgedreht. Das Abschlusselement umfasst vorzugsweise eine Anschlagseite, die am Ende des Schneckenflügels anliegt und in diesem Bereich den Schneckenflügel verstärkt.Furthermore, a reinforcing element is preferably designed as a closing element. This final element is last turned on the auger wing. The closing element preferably comprises a stop side, which rests against the end of the worm wing and reinforces the worm wing in this area.
Des Weiteren ist zumindest ein Verstärkungselement vorzugsweise als Zwischenelement ausgebildet. Das Zwischenelement befindet sich auf dem Schneckenflügel zwischen dem Übergangselement und dem Abschlusselement. Insbesondere können zwischen Übergangselement und Abschlusselement auch mehrere der Zwischenelemente angeordnet werden.Furthermore, at least one reinforcing element is preferably designed as an intermediate element. The intermediate element is located on the worm wing between the transition element and the end element. In particular, between the transition element and the closing element and several of the intermediate elements can be arranged.
Vorzugsweise ist auf die Seele der Schnecke eine Hülse aufgeschoben und befestigt. Die Hülse liegt am vordersten Verstärkungselement (Abschlusselement) an und verhindert somit ein Abdrehen bzw. Lösen dieses Verstärkungselements in Umfangsrichtung. Alle weiteren Verstärkungselemente sind durch ihre formschlüssige Anlage an dem jeweils weiter vorne angeordneten Verstärkungselement gegen ein Abdrehen bzw. Lösen in Umfangsrichtung gesichert.Preferably, a sleeve is pushed onto the core of the screw and secured. The sleeve abuts the foremost reinforcing element (closing element) and thus prevents a twisting or loosening of this reinforcing element in the circumferential direction. All other reinforcing elements are secured by their positive engagement with the respective further forward reinforcing element against twisting or loosening in the circumferential direction.
Das Verstärkungselement wird vorzugsweise aus Hartmetall und/oder Hartkeramik gefertigt. Insbesondere das gesinterte Verstärkungselement besteht aus einem keramischen Hartstoff, wie beispielsweise Wolframcarbit und einer zähen Matrix aus Kobalt und Nickel oder Eisen.The reinforcing element is preferably made of hard metal and / or hard ceramic. In particular, the sintered reinforcing member is made of a ceramic hard material such as tungsten carbide and a tough matrix of cobalt and nickel or iron.
Die Erfindung umfasst ferner ein Verfahren zum Herstellen einer Schnecke. Die Schnecke ist insbesondere zur Verwendung in einem Pressschneckenseparator ausgebildet. Insbesondere wird mit dem Verfahren die bereits beschriebene Schnecke hergestellt. Beim dem Verfahren erfolgt ein Bereitstellen der Seele, wobei auf der Seele zumindest ein Schneckenflügel angeordnet ist. Auf diesen Schneckenflügel wird zumindest ein Verstärkungselement aufgedreht. Das Verstärkungselement weist den beschriebenen U-förmigen Querschnitt auf. Das Aufdrehen erfolgt entlang der Längsachse und in Umfangsrichtung.The invention further comprises a method for producing a screw. The screw is especially designed for use in a screw extruder. In particular, the process produces the already described screw. In the method, a provision of the soul takes place, wherein on the soul at least one Schneckenflügel is arranged. At least one reinforcing element is turned on on this screw wing. The reinforcing element has the described U-shaped cross-section. The turning takes place along the longitudinal axis and in the circumferential direction.
Die im Rahmen der erfindungsgemäßen Schnecke vorgestellten vorteilhaften Ausgestaltungen und Unteransprüche finden entsprechend vorteilhafte Anwendung auf das erfindungsgemäße Verfahren.The presented in the context of the screw according to the invention advantageous embodiments and subclaims find correspondingly advantageous application to the inventive method.
Insbesondere ist vorgesehen, dass das zumindest eine Verstärkungselement einteilig, vorzugsweise in einem 3D-Druck, hergestellt wird.In particular, it is provided that the at least one reinforcing element is produced in one piece, preferably in a 3D printing.
Bevorzugt wird zunächst ein Grünling des Verstärkungselements hergestellt. Der Grünling wird vorzugsweise in einem 3D-Druck hergestellt. Anschließend wird der Grünling zur Bildung des Verstärkungselements gesintert.Preferably, first of all a green compact of the reinforcing element is produced. The green body is preferably produced in a 3D print. Subsequently, the green compact is sintered to form the reinforcing element.
Besonders bevorzugt wird der Grünling auf den Schneckenflügel wie beschrieben aufgedreht und erst anschließend auf dem Schneckenflügel gesintert. Insbesondere werden alle verwendeten Verstärkungselemente zunächst auf den Schneckenflügel aufgedreht und anschließend alle Verstärkungselemente gemeinsam gesintert.Particularly preferably, the green compact is wound on the screw wing as described and then sintered on the screw wing. In particular, all the reinforcing elements used are first turned on the worm wing and then sintered all reinforcing elements together.
Nach dem Aufbringen der Verstärkungselemente auf den Schneckenflügel ist es möglich, die Verstärkungselemente, beispielsweise spanend, zu bearbeiten.After applying the reinforcing elements on the screw flights, it is possible to machine the reinforcing elements, for example by machining.
Die Erfindung umfasst ferner einen Pressschneckenseparator mit einer der beschriebenen Schnecken bzw. mit einer Schnecke, hergestellt nach einem hier beschriebenen Verfahren.The invention further comprises a press screw separator with one of the described screws or with a screw, produced by a method described here.
Weitere Einzelheiten, Vorteile und Merkmale der vorliegenden Erfindung ergeben sich aus nachfolgender Beschreibung eines Ausführungsbeispiels anhand der Zeichnung. Es zeigt:
Figur 1- eine schematische Ansicht eines Pressschneckenseparators mit erfindungsgemäßer Schnecke gemäß dem Ausführungsbeispiel,
Figur 2- die erfindungsgemäße Schnecke gemäß dem Ausführungsbeispiel,
Figur 3- eine schematische Ansicht der Schnecke aus
Figur 2 in einer zur Längsachse senkrechten Ebene, Figur 4- eine Hülse der Schnecke aus
Figur 2 , - Figur 5
- ein Verstärkungselement der Schnecke aus
Figur 2 , ausgebildet als Abschlusselement, Figur 6- ein Verstärkungselement der Schnecke aus
Figur 2 , ausgebildet als Zwischenelement, und Figur 7- ein Verstärkungselement der Schnecke aus
Figur 2 , ausgebildet als Übergangselement.
- FIG. 1
- a schematic view of a press screw separator with inventive screw according to the embodiment,
- FIG. 2
- the screw according to the invention according to the embodiment,
- FIG. 3
- a schematic view of the screw
FIG. 2 in a plane perpendicular to the longitudinal axis, - FIG. 4
- a sleeve of the screw
FIG. 2 . - FIG. 5
- a reinforcing element of the screw
FIG. 2 , designed as a final element, - FIG. 6
- a reinforcing element of the screw
FIG. 2 , formed as an intermediate element, and - FIG. 7
- a reinforcing element of the screw
FIG. 2 formed as a transition element.
Die
Der Pressschneckenseparator 100 gemäß
Am Anfang der Schnecke 1 ist im Gehäuse 101 ein Zulauf 103 für die Trübe ausgebildet. Radial außerhalb des Siebes 106 befindet sich ein Ablauf 105 für die durch das Sieb 106 nach außen tretenden flüssigen Bestandteile der Trübe.At the beginning of the
Die Schnecke 1 umfasst eine Seele 2 und zwei um die Seele 2 gewundene Schneckenflügel 3. Am Gehäuse 101 befindet sich ein Ausstoßregler 104. Die Seele 2 weist einen Bereich ohne Schneckenflügel 3 auf, der sich bis in diesen Ausstoßregler 104 erstreckt. Am Ausstoßregler 104 bildet sich ein Pfropfen aus dem Feststoff der Trübe.The
Anhand der
Gemäß
Die beiden Schneckenflügel 3 weisen jeweils einen verstärkten Bereich auf, der durch mehrere Verstärkungselemente 4 gebildet ist. Auf jedem Schneckenflügel 3 befindet sich ein Verstärkungselement 4 ausgebildet als Abschlusselement 10, ein Verstärkungselement 4 ausgebildet als Übergangselement 15 und mehrere Verstärkungselemente 4, ausgebildet als Zwischenelemente 14.The two
Die
Die Schneckenflügel 3 umfassen jeweils eine vordere Axialseite 5, die dem Ausstoßregler 104 zugewandt ist, eine gegenüberliegende hintere Axialseite 6 und eine Radialseite 7. Die Radialseite 7 der Schneckenflügel 3 ist radial nach außen und somit dem Sieb 106 zugewandt.The
Der vordere Schenkel 8 liegt an der vorderen Axialseite 5 an. Der hintere Schenkel 9 liegt an der hinteren Axialseite 6 an. Der Übergangsbereich zwischen den beiden Schenkeln 8, 9 überdeckt die Radialseite 7 und liegt vorzugsweise auf der Radialseite 7 auf.The
Wie die
Durch die relativ große Ausgestaltung des Winkels α und den U-förmigen Querschnitt der Verstärkungselemente 4, ist es nicht möglich, die Verstärkungselemente 4 von außen, also entlang der Radialrichtung 31, auf den Schneckenflügel 3 aufzustecken. Die Verstärkungselemente 4 werden deshalb in Umfangsrichtung 32 und entlang der Längsachse 30 auf den Schneckenflügel 3 aufgedreht.Due to the relatively large configuration of the angle α and the U-shaped cross-section of the reinforcing
Das in
Das in
Es ist auch vorgesehen, die Hülse 12 einteilig mit dem Abschlusselement 10 zu fertigen.It is also provided to manufacture the
Neben der vorstehenden schriftlichen Beschreibung der Erfindung wird zu deren ergänzender Offenbarung hiermit explizit auf die zeichnerische Darstellung der Erfindung in den Figuren Bezug genommen.In addition to the foregoing written description of the invention, reference is hereby made to the drawings of the invention in the figures to the additional disclosure thereof.
- 11
- Schneckeslug
- 22
- Seelesoul
- 33
- Schneckenflügelscrew flights
- 44
- Verstärkungselementereinforcing elements
- 55
- vordere Axialseitefront axial side
- 66
- hintere Axialseiterear axial side
- 77
- Radialseiteradial side
- 88th
- vorderer Schenkelfront thigh
- 99
- hinterer Schenkelrear thigh
- 1010
- Abschlusselementtermination element
- 1111
- Anschlagseitestop side
- 1212
- Hülseshell
- 1313
- Blockierkanteblocking edge
- 1414
- Zwischenelementintermediate element
- 1515
- ÜbergangselementTransition element
- 1616
- verjüngter Abschnitttapered section
- 3030
- Längsachselongitudinal axis
- 3131
- Radialrichtungradial direction
- 3232
- Umfangsrichtungcircumferentially
- 3333
- erste Schenkellängefirst leg length
- 3434
- zweite Schenkellängesecond leg length
- 3535
- dritte Längethird length
- 100100
- Pressschneckenseparatorscrew extractor
- 101101
- Gehäusecasing
- 102102
- Antriebdrive
- 103103
- ZulaufIntake
- 104104
- Ausstoßregleremissions controls
- 105105
- Ablaufprocedure
- 106106
- Siebscreen
Claims (10)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI201830598T SI3427937T1 (en) | 2017-07-13 | 2018-07-03 | Conical worm of a conical worm separator |
HRP20220394TT HRP20220394T1 (en) | 2017-07-13 | 2018-07-03 | Conical worm of a conical worm separator |
PL18181313T PL3427937T3 (en) | 2017-07-13 | 2018-07-03 | Conical worm of a conical worm separator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017212008.8A DE102017212008A1 (en) | 2017-07-13 | 2017-07-13 | Screw of a screw extruder |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3427937A1 true EP3427937A1 (en) | 2019-01-16 |
EP3427937B1 EP3427937B1 (en) | 2022-01-12 |
Family
ID=62846005
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18181313.0A Active EP3427937B1 (en) | 2017-07-13 | 2018-07-03 | Conical worm of a conical worm separator |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP3427937B1 (en) |
DE (1) | DE102017212008A1 (en) |
DK (1) | DK3427937T3 (en) |
ES (1) | ES2908959T3 (en) |
HR (1) | HRP20220394T1 (en) |
HU (1) | HUE058222T2 (en) |
PL (1) | PL3427937T3 (en) |
PT (1) | PT3427937T (en) |
SI (1) | SI3427937T1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6917102B1 (en) * | 2021-04-30 | 2021-08-11 | 株式会社アクアトリム | Dehydrator |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202022100751U1 (en) * | 2022-02-10 | 2023-05-17 | Vogelsang Gmbh & Co. Kg | Conveyor screw for a screw separator |
Citations (9)
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FR2289411A1 (en) * | 1974-10-30 | 1976-05-28 | Egretier M | Archimedean screw apparatus esp. for processing grapes - having PTFE cover extending over part of windings of screw |
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DE4214217A1 (en) | 1992-04-30 | 1993-11-04 | Fan Engineering Gmbh | Wearing elements attachment device to liq.-solid screw press separator screws - comprises wearing elements in form of angles shaped to suit and attached to screw vanes and tapering to screw axis, for waste paper residue and cattle slurry |
JPH10128156A (en) * | 1996-11-05 | 1998-05-19 | Nippei Toyama Corp | Screw conveyor type centrifugal separator |
DE202012008077U1 (en) | 2012-08-23 | 2012-09-17 | Röhren- und Pumpenwerk Bauer Gesellschaft m.b.H. | Press screw separator for separating solids from a solid-liquid mixture |
DE202012011864U1 (en) | 2012-12-11 | 2013-01-14 | Röhren- und Pumpenwerk Bauer GmbH | screw extractor |
CA2939609A1 (en) * | 2015-12-07 | 2017-06-07 | Yuehua Xu | Metal matrix compositions and methods for manufacturing same |
-
2017
- 2017-07-13 DE DE102017212008.8A patent/DE102017212008A1/en not_active Ceased
-
2018
- 2018-07-03 PT PT181813130T patent/PT3427937T/en unknown
- 2018-07-03 EP EP18181313.0A patent/EP3427937B1/en active Active
- 2018-07-03 PL PL18181313T patent/PL3427937T3/en unknown
- 2018-07-03 HR HRP20220394TT patent/HRP20220394T1/en unknown
- 2018-07-03 DK DK18181313.0T patent/DK3427937T3/en active
- 2018-07-03 SI SI201830598T patent/SI3427937T1/en unknown
- 2018-07-03 HU HUE18181313A patent/HUE058222T2/en unknown
- 2018-07-03 ES ES18181313T patent/ES2908959T3/en active Active
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2289411A1 (en) * | 1974-10-30 | 1976-05-28 | Egretier M | Archimedean screw apparatus esp. for processing grapes - having PTFE cover extending over part of windings of screw |
EP0034847A1 (en) * | 1980-02-19 | 1981-09-02 | Metallgesellschaft Ag | Workpieces with armoured edges and/or surfaces |
DE3140364A1 (en) * | 1981-10-10 | 1983-04-28 | Siebtechnik GmbH, 4330 Mülheim | Screw conveyor, in particular for solid bowl centrifuges |
DE3907817A1 (en) * | 1989-03-10 | 1990-09-13 | Heinz Kasten | Apparatus and process for dewatering liquid manure (slurry) and sewage sludge |
DE4214217A1 (en) | 1992-04-30 | 1993-11-04 | Fan Engineering Gmbh | Wearing elements attachment device to liq.-solid screw press separator screws - comprises wearing elements in form of angles shaped to suit and attached to screw vanes and tapering to screw axis, for waste paper residue and cattle slurry |
JPH10128156A (en) * | 1996-11-05 | 1998-05-19 | Nippei Toyama Corp | Screw conveyor type centrifugal separator |
DE202012008077U1 (en) | 2012-08-23 | 2012-09-17 | Röhren- und Pumpenwerk Bauer Gesellschaft m.b.H. | Press screw separator for separating solids from a solid-liquid mixture |
DE202012011864U1 (en) | 2012-12-11 | 2013-01-14 | Röhren- und Pumpenwerk Bauer GmbH | screw extractor |
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JP2022171047A (en) * | 2021-04-30 | 2022-11-11 | 株式会社アクアトリム | Dehydrator |
Also Published As
Publication number | Publication date |
---|---|
SI3427937T1 (en) | 2022-05-31 |
DK3427937T3 (en) | 2022-03-28 |
PT3427937T (en) | 2022-03-15 |
ES2908959T3 (en) | 2022-05-04 |
DE102017212008A1 (en) | 2019-01-17 |
PL3427937T3 (en) | 2022-05-09 |
HUE058222T2 (en) | 2022-07-28 |
HRP20220394T1 (en) | 2022-05-27 |
EP3427937B1 (en) | 2022-01-12 |
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