WO2001041998A1 - Transmission gearbox for a twin screw extruder - Google Patents

Transmission gearbox for a twin screw extruder Download PDF

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Publication number
WO2001041998A1
WO2001041998A1 PCT/EP2000/011270 EP0011270W WO0141998A1 WO 2001041998 A1 WO2001041998 A1 WO 2001041998A1 EP 0011270 W EP0011270 W EP 0011270W WO 0141998 A1 WO0141998 A1 WO 0141998A1
Authority
WO
WIPO (PCT)
Prior art keywords
inner frame
gear housing
frame segments
screw extruder
outer hood
Prior art date
Application number
PCT/EP2000/011270
Other languages
German (de)
French (fr)
Inventor
Rolf DÖBEREINER
Gerd MÖSTA
Dieter BRÄUTIGAM
Dieter RÜDDENKLAU
Thomas Wiegand
Original Assignee
Thyssen Henschel Industrietechnik Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE10052651A external-priority patent/DE10052651A1/en
Application filed by Thyssen Henschel Industrietechnik Gmbh filed Critical Thyssen Henschel Industrietechnik Gmbh
Priority to EP00985029A priority Critical patent/EP1235677A1/en
Publication of WO2001041998A1 publication Critical patent/WO2001041998A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/20—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members
    • F16H1/22—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/252—Drive or actuation means; Transmission means; Screw supporting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/22—Extrusion presses; Dies therefor
    • B30B11/24—Extrusion presses; Dies therefor using screws or worms
    • B30B11/241—Drive means therefor; screw bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion

Definitions

  • the invention relates to a gear housing for a twin-screw extruder according to claim 1.
  • Known gear housings for twin-screw extruders generally combine the ability to absorb and transmit force with the ability to seal oil in one housing. Such housings must therefore be made very stable, have a high weight and require complex machining of the functional surfaces.
  • the invention has for its object a gear housing for the high
  • the gear housing consists of an inner frame construction, which completely absorbs the bearing forces and back pressure forces from the extrusion process, and an outer hood, which does not have to absorb any operating forces and is specially optimized with regard to oil tightness and footprint on the foundation.
  • the inner frame construction consists of a series of frame segments arranged parallel and at a distance from one another, in each of which the necessary bearing bores are arranged. The individual frame segments are connected via axially parallel connecting struts to form a stable structural unit which then absorbs the entire bearing forces and in particular the axial forces caused by the extrusion process and transmits them in a short way.
  • the frame segments are of identical construction, at least in their outer contour, so that the outer hood, which can be pushed together from one or more parts, can at least enclose the entire inner frame construction in an oil-tight manner.
  • the modular design of several compact, partially identical frame segments ensures simple and precise processing of the functional surfaces. Furthermore, simple assembly and good accessibility are guaranteed.
  • the individual Get ⁇ ' ebewellen and wheels can in the inner
  • Frame construction in particular be arranged such that the drive shaft and output shaft are guided by intermediate gears without radial force in order to keep the radial bearing forces in the frame segments as low as possible.
  • the outer hood is relieved of the operating forces of the extruder gear and can be optimized with regard to its tasks of ensuring oil tightness and contact areas. Furthermore, the designer has extensive design freedom for the design of this hood, which does not have to or hardly needs to be based on the design of the frame construction. In contrast to the inner frame construction, the hood can also be made of non-ferrous materials.
  • the invention is associated with the advantage that the separation of individual housing functions and division of these functions into specially optimized components enables the designer to forego compromises at the expense of these functions.
  • the frame segments are adjusted exactly to the required force flows in the manner of a grid construction.
  • the outer hood can be made of a relatively light and smooth material.
  • FIGS. 1 and 2 show it 1 shows the basic housing structure of the transmission housing with the inner frame construction and the adjacent outer hood 7,
  • Fig. 2 shows the basic arrangement of the gears in such a gear housing.
  • the inner frame construction consists of four parallel and spaced frame segments (1 to 4) that absorb the bearing forces. These module-like frame segments are designed such that the bearing bores of all shafts in the module in question are arranged in one plane, preferably one above the other. Such a frame segment (1 to 4) can be produced simply and precisely. All mounting holes (la to lg) are easily accessible during assembly. The axial forces from the extrusion process are essentially absorbed by the frame segments (2 and 4). Via the connecting struts (6 and 7) a defined and closed flow of force is created in the inner frame construction.
  • the outer hood (7) can be made of thin sheet steel or an adequate surrogate, e.g. B. plastic. It does not contribute to the stability of the gear housing. The outer hood (7) ensures the oil tightness of the gearbox and can also provide noise insulation. It is connected to the foundation.
  • Fig. 2 shows the arrangement of the gears.
  • the left output shaft (8) which leads to the extruder shaft, is driven via the intermediate wheels (9 and 10) from above and via the intermediate wheels (11 and 12) from below.
  • the tooth meshes lie one above the other at a 180 ° angle. In this way it is achieved that these shafts are guided free of radial force from the frame.
  • the right output shaft (14), which is led to the second extruder shaft, is guided by the frame without force.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • General Details Of Gearings (AREA)

Abstract

The invention relates to a transmission gearbox for a twin screw extruder. The inventive gearbox consists of a) an inner frame construction (1 to 6) comprising at least two frame segments (1 to 4) that are arranged in parallel in relation to each other, bores of the bearing (1a to 1g) that are arranged therein and are used for the individual gear shafts and gear wheels (8 to 14) and at least two connecting struts (5, 6) that are arranged parallel to the axis thereof and are used for connecting the frame segments (1 to 6) and b) a one-piece or multi-piece, at least oil-proof outer cap (7) that is detachably connected to the inner frame construction (1 to 6) in such a way that operating forces of the inner frame construction (1 to 6) are not transmitted to the outer cap (7).

Description

Getriebegehäuse für DoppelschneckenextruderGear housing for twin screw extruders
Beschreibungdescription
Die Erfindung bezieht sich auf ein Getriebegehäuse für einen Doppelschneckenextruder nach Patentanspruch 1.The invention relates to a gear housing for a twin-screw extruder according to claim 1.
Bekannte Getriebegehäuse für Doppelschneckenextruder vereinen in der Regel die Fähigkeit der Kraftaufnahme und -weiterleitung mit der Fähigkeit der Olabdichtung in einem Gehäuse. Derartige Gehäuse müssen dadurch sehr stabil ausgeführt werden, besitzen ein hohes Gewicht und erfordern eine aufwendige Bearbeitung der Funktionsflächen.Known gear housings for twin-screw extruders generally combine the ability to absorb and transmit force with the ability to seal oil in one housing. Such housings must therefore be made very stable, have a high weight and require complex machining of the functional surfaces.
Der Erfindung liegt die Aufgabe zugrunde, ein Getriebegehäuse für die hohenThe invention has for its object a gear housing for the high
Anforderungen beim Doppelschneckenextruder vorzuschlagen, das leichter ist und preiswerter hergestellt werden kann sowie die Getriebemontage und Zugänglichkeit zu den Zahnrädern und Lagern erleichtert.Propose requirements for the twin-screw extruder, which is lighter and cheaper to manufacture and which facilitates gear assembly and access to the gears and bearings.
Die Lösung dieser Aufgabe ist im Patentanspruch 1 angegeben. Die Unteransprüche 2 bis 4 enthalten sinnvolle Ausführungsformen dazu.The solution to this problem is specified in claim 1. The sub-claims 2 to 4 contain useful embodiments.
Erfindungsgemäß besteht das Getriebegehäuse aus einer inneren Rahmenkonstruktion, die die Lagerkräfte und Rückdruckkräfte aus dem Extrusionsprozeß vollständig aufnimmt, und einer äußeren Haube, die keine Betriebskräfte aufzunehmen hat und speziell im Hinblick auf Öldichtheit und Aufstandsfläche auf dem Fundament optimiert ist. Die innere Rahmenkonstruktion besteht erfindungsgemäß aus einer Reihe von parallel und mit Abstand zueinander angeordneten Rahmensegmenten, in denen jeweils die erforderlichen Lagerbohrungen angeordnet sind. Die einzelnen Rahmensegmente sind über achsparallele Verbindungsstreben zu einer stabilen Baueinheit verbunden, die dann die gesamten Lagerkräfte und insbesondere die durch den Extrusionsprozeß hervorgerufenen Axialkräfte aufnimmt und auf kurzem Wege weiterleitet. Die Rahmensegmente sind zumindest in ihrer äußeren Kontur baugleich ausgeführt, so daß die aus ein oder mehreren Teilen zusammenschiebbare äußere Haube die gesamte innere Rahmenkonstruktion zumindest öldicht einschließen kann. Durch die modulare Bauweise aus mehreren kompakten, zum Teil baugleichen Rahmensegmenten ist eine einfache und genaue Bearbeitung der Funktionsflächen sichergestellt. Desweiteren ist eine einfache Montage und gute Zugänglichkeit gewährleistet.According to the invention, the gear housing consists of an inner frame construction, which completely absorbs the bearing forces and back pressure forces from the extrusion process, and an outer hood, which does not have to absorb any operating forces and is specially optimized with regard to oil tightness and footprint on the foundation. According to the invention, the inner frame construction consists of a series of frame segments arranged parallel and at a distance from one another, in each of which the necessary bearing bores are arranged. The individual frame segments are connected via axially parallel connecting struts to form a stable structural unit which then absorbs the entire bearing forces and in particular the axial forces caused by the extrusion process and transmits them in a short way. The frame segments are of identical construction, at least in their outer contour, so that the outer hood, which can be pushed together from one or more parts, can at least enclose the entire inner frame construction in an oil-tight manner. The modular design of several compact, partially identical frame segments ensures simple and precise processing of the functional surfaces. Furthermore, simple assembly and good accessibility are guaranteed.
Die einzelnen Getπ'ebewellen und -räder können in der innerenThe individual Getπ ' ebewellen and wheels can in the inner
Rahmenkonstruktion insbesondere derart angeordnet sein, daß Antriebswelle und Abtriebswelle durch Zwischenräder radialkraftfrei geführt werden, um die radialen Lagerkräfte in den Rahmensegmenten möglichst gering zu halten.Frame construction in particular be arranged such that the drive shaft and output shaft are guided by intermediate gears without radial force in order to keep the radial bearing forces in the frame segments as low as possible.
Um die Öldichtheit des Getriebegehäuses zu gewährleisten, ist die äußere Haube hinsichtlich der Betriebskräfte des Extrudergetriebes entlastet und kann hinsichtlich ihrer Aufgaben, für Öldichtheit und Aufstandsflächen zu sorgen, optimiert werden. Desweiteren hat der Konstrukteur eine weitgehende Gestaltungsfreiheit für das Design dieser Haube, das sich nicht oder kaum an der Ausführung der Rahmenkonstruktion orientieren muß. Im Unterschied zur inneren Rahmenkonstruktion ist auch eine Ausführung der Haube aus Nicht- Eisenwerkstoffen denkbar.In order to ensure the oil tightness of the gear housing, the outer hood is relieved of the operating forces of the extruder gear and can be optimized with regard to its tasks of ensuring oil tightness and contact areas. Furthermore, the designer has extensive design freedom for the design of this hood, which does not have to or hardly needs to be based on the design of the frame construction. In contrast to the inner frame construction, the hood can also be made of non-ferrous materials.
Die Erfindung ist mit dem Vorteil verbunden, daß durch die Trennung einzelner Gehäusefunktionen und Aufteilung dieser Funktionen auf speziell hierfür optimierte Bauteile der Konstrukteur in die Lage versetzt wird, auf Kompromisse zu Lasten dieser Funktionen zu verzichten. Die Rahmensegmente werden nach Art einer Gitterkonstruktion genau auf die erforderlichen Kraftflüsse eingestellt. Die äußere Haube kann aus einem relativ leichten und glatten Material bestehen.The invention is associated with the advantage that the separation of individual housing functions and division of these functions into specially optimized components enables the designer to forego compromises at the expense of these functions. The frame segments are adjusted exactly to the required force flows in the manner of a grid construction. The outer hood can be made of a relatively light and smooth material.
Die Erfindung wird anhand der beigefügten Fig. 1 und 2 beispielsweise näher erläutert. Es zeigen Fig. 1 den prinzipiellen Gehäuseaufbau des Getriebegehäuses mit der inneren Rahmenkonstruktion und der daneben liegenden äußeren Haube 7,The invention is explained in more detail for example with reference to the accompanying FIGS. 1 and 2. Show it 1 shows the basic housing structure of the transmission housing with the inner frame construction and the adjacent outer hood 7,
Fig. 2 die prinzipielle Anordnung der Zahnräder in einem derartigen Getriebegehäuse.Fig. 2 shows the basic arrangement of the gears in such a gear housing.
Die innere Rahmenkonstruktion setzt sich aus vier parallel und mit Abstand zueinander angeordneten Rahmensegmenten (1 bis 4) zusammen, die die Lagerkräfte aufnehmen. Diese modulartigen Rahmensegmente sind derart gestaltet, daß die Lagerbohrungen aller Wellen in dem betreffenden Modul in einer Ebene, vorzugsweise übereinander angeordnet sind. Ein derartiges Rahmensegment (1 bis 4) ist einfach und genau herstellbar. Bei der Montage sind alle Lagerbohrungen (la bis lg) gut zugänglich. Die Axialkräfte aus dem Extrusionsprozeß werden im Wesentlichen von den Rahmensegmenten (2 und 4) aufgenommen. Über die Verbindungsstreben (6 und 7) wird ein definierter und geschlossener Kraftfluß in der inneren Rahmenkonstruktion hergestellt. Die äußere Haube (7) kann aus dünnem Stahlblech oder einem adäquaten Surrogat, z. B. Kunststoff ausgeführt werden. Sie trägt nicht zur Stabilität des Getriebegehäuses bei. Die äußere Haube (7) gewährleistet dafür die Öldichtheit des Getriebegehäuses und kann zusätzlich eine Geräuschdämmung bewirken. Sie wird mit dem Fundament verbunden.The inner frame construction consists of four parallel and spaced frame segments (1 to 4) that absorb the bearing forces. These module-like frame segments are designed such that the bearing bores of all shafts in the module in question are arranged in one plane, preferably one above the other. Such a frame segment (1 to 4) can be produced simply and precisely. All mounting holes (la to lg) are easily accessible during assembly. The axial forces from the extrusion process are essentially absorbed by the frame segments (2 and 4). Via the connecting struts (6 and 7) a defined and closed flow of force is created in the inner frame construction. The outer hood (7) can be made of thin sheet steel or an adequate surrogate, e.g. B. plastic. It does not contribute to the stability of the gear housing. The outer hood (7) ensures the oil tightness of the gearbox and can also provide noise insulation. It is connected to the foundation.
Fig. 2 zeigt die Anordnung der Zahnräder. Der Antrieb der linken Abtriebswelle (8), die zur Extruderwelle führt, erfolgt über die Zwischenräder (9 und 10) von oben sowie über die Zwischenräder (11 und 12) von unten. Bei der Abtriebswelle (8) wie auch bei der Antriebswelle (13) liegen die Zahneingriffe in einem 180°-Winkel übereinander. Auf diese Weise wird erreicht, daß diese Wellen radialkraftfrei vom Rahmen geführt werden. Die rechte Abtriebswelle (14), die zur zweiten Extruderwelle geführt wird, wird kräftefrei vom Rahmen geführt. BezugszeichenlisteFig. 2 shows the arrangement of the gears. The left output shaft (8), which leads to the extruder shaft, is driven via the intermediate wheels (9 and 10) from above and via the intermediate wheels (11 and 12) from below. In the output shaft (8) as well as in the drive shaft (13), the tooth meshes lie one above the other at a 180 ° angle. In this way it is achieved that these shafts are guided free of radial force from the frame. The right output shaft (14), which is led to the second extruder shaft, is guided by the frame without force. LIST OF REFERENCE NUMBERS
1 Rahmensegment 1 la bis lg Lagerbohrungen in Rahmensegment 11 frame segment 1 la to lg bearing holes in frame segment 1
2 Rahmensegment II2 frame segment II
3 Rahmensegment III3 frame segment III
4 Rahmensegment IV4 frame segment IV
5 Verbindungsstrebe5 connecting strut
6 Verbindungsstrebe6 connecting strut
7 äußere Haube7 outer hood
8 Abtriebswelle links8 left output shaft
9 Zwischenrad9 idler gear
10 Zwischenrad10 intermediate wheel
11 Zwischenrad11 idler gear
12 Zwischenrad12 idler gear
13 Antriebswelle13 drive shaft
14 Abtriebswelle rechts 14 right output shaft

Claims

Patentansprüche claims
1. Getriebegehäuse für einen Doppelschneckenextruder bestehend aus a) einer inneren Rahmenkonstruktion (1 bis 6) mit mindestens zwei parallel und mit Abstand zueinander angeordneten Rahmensegmenten (1 bis 4), darin angeordneten Lagerbohrungen (la bis lg) für die einzelnen Getriebewellen und -räder (8 bis 14) und mindestens zwei achsparallel dazu angeordneten Verbindungsstreben (5, 6) zur Verbindung der Rahmensegmente (1 bis 6) und b) einer ein oder mehrteiligen, zumindest öldichten äußeren Haube (7), die derart lösbar mit der inneren Rahmenkonstruktion (1 bis 6) verbunden ist, daß keine Betriebskräfte von der inneren Rahmenkonstruktion (1 bis 6) an die äußere Haube (7) übertragen werden.1.Gear housing for a twin-screw extruder consisting of a) an inner frame structure (1 to 6) with at least two frame segments (1 to 4) arranged parallel and at a distance from one another, bearing bores arranged therein (la to lg) for the individual gear shafts and gears ( 8 to 14) and at least two axially parallel connecting struts (5, 6) for connecting the frame segments (1 to 6) and b) a one or more-part, at least oil-tight outer hood (7), which is detachable in this way with the inner frame structure (1 to 6) is connected that no operating forces are transmitted from the inner frame structure (1 to 6) to the outer hood (7).
2. Getriebegehäuse nach Anspruch 1, dadurch gekennzeichnet, daß die Rahmensegmente (1 bis 4), abgesehen von den erforderlichen Lagerbohrungen (la bis lg), im Wesentlichen baugleich sind.2. Gear housing according to claim 1, characterized in that the frame segments (1 to 4), apart from the required bearing bores (LA to LG), are substantially identical.
3. Getriebegehäuse nach Anspruch 1, dadurch gekennzeichnet, daß die äußere Haube (7) zumindest zweiteilig ausgebildet ist und daß die einzelnen Teile in axialer oder radialer Richtung kastenförmig zusammenschiebbar sind.3. Gear housing according to claim 1, characterized in that the outer hood (7) is formed at least in two parts and that the individual parts can be pushed together box-shaped in the axial or radial direction.
4. Getriebegehäuse nach Anspruch 1, dadurch gekennzeichnet, daß die Lagerbohrungen (1 a bis 1 g) in den Rahmensegmenten (1 bis 4) derart angeordnet sind, daß Antriebswelle (13) und Abtriebswelle (8) von Zwischenrädern (9 bis 12) radialkraftfrei geführt werden können. 4. Gear housing according to claim 1, characterized in that the bearing bores (1 a to 1 g) in the frame segments (1 to 4) are arranged such that the drive shaft (13) and output shaft (8) of intermediate wheels (9 to 12) free of radial force can be performed.
PCT/EP2000/011270 1999-12-09 2000-11-15 Transmission gearbox for a twin screw extruder WO2001041998A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP00985029A EP1235677A1 (en) 1999-12-09 2000-11-15 Transmission gearbox for a twin screw extruder

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19959312 1999-12-09
DE19959312.4 1999-12-09
DE10052651.9 2000-10-24
DE10052651A DE10052651A1 (en) 1999-12-09 2000-10-24 Gear housing for twin screw extruders

Publications (1)

Publication Number Publication Date
WO2001041998A1 true WO2001041998A1 (en) 2001-06-14

Family

ID=26007476

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/011270 WO2001041998A1 (en) 1999-12-09 2000-11-15 Transmission gearbox for a twin screw extruder

Country Status (3)

Country Link
EP (1) EP1235677A1 (en)
TW (1) TW457344B (en)
WO (1) WO2001041998A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1729390A1 (en) * 1967-08-24 1971-07-01 Weber Heinz Dipl Ing Plastic twin screw press
DE4305133A1 (en) * 1993-02-19 1994-08-25 Flender A F & Co Drive mechanism for twin-screw extruder
DE29804958U1 (en) * 1997-12-08 1998-07-30 Thyssen Henschel GmbH, 34127 Kassel Gear, especially for twin screw extruders

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1729390A1 (en) * 1967-08-24 1971-07-01 Weber Heinz Dipl Ing Plastic twin screw press
DE4305133A1 (en) * 1993-02-19 1994-08-25 Flender A F & Co Drive mechanism for twin-screw extruder
DE29804958U1 (en) * 1997-12-08 1998-07-30 Thyssen Henschel GmbH, 34127 Kassel Gear, especially for twin screw extruders

Also Published As

Publication number Publication date
TW457344B (en) 2001-10-01
EP1235677A1 (en) 2002-09-04

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