EP3551323A1 - Ailette de mélange comprenant un élément d'usure ainsi que procédé permettant de fixer un élément d'usure à une partie de base d'une ailette de mélange - Google Patents

Ailette de mélange comprenant un élément d'usure ainsi que procédé permettant de fixer un élément d'usure à une partie de base d'une ailette de mélange

Info

Publication number
EP3551323A1
EP3551323A1 EP17822573.6A EP17822573A EP3551323A1 EP 3551323 A1 EP3551323 A1 EP 3551323A1 EP 17822573 A EP17822573 A EP 17822573A EP 3551323 A1 EP3551323 A1 EP 3551323A1
Authority
EP
European Patent Office
Prior art keywords
base
wear
wear element
recess
base part
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP17822573.6A
Other languages
German (de)
English (en)
Inventor
Clemens Schmitt
Simon Blau
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maschinenfabrik Gustav Eirich GmbH and Co KG
Original Assignee
Maschinenfabrik Gustav Eirich GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Maschinenfabrik Gustav Eirich GmbH and Co KG filed Critical Maschinenfabrik Gustav Eirich GmbH and Co KG
Publication of EP3551323A1 publication Critical patent/EP3551323A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B4/00—Shrinkage connections, e.g. assembled with the parts at different temperature; Force fits; Non-releasable friction-grip fastenings
    • F16B4/004—Press fits, force fits, interference fits, i.e. fits without heat or chemical treatment
    • 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
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
    • F16B19/02—Bolts or sleeves for positioning of machine parts, e.g. notched taper pins, fitting pins, sleeves, eccentric positioning rings

Definitions

  • Blade with wear element and method for attaching a
  • the present invention relates to a mixing blade consisting of a fastened to a shaft base and a wear element, wherein the wear element is releasably attached or attachable to the base. Furthermore, the present invention relates to a method for mounting a wear element on the base.
  • Such a mixing blade with detachable wear element is known, for example, from DE 10 2005 019 010 A1.
  • Such mixing blades are intended for use in mixers in which granular, abrasive materials are processed.
  • Mixers which have one or more mixer shafts arranged perpendicularly to the mixing container bottom and which are provided with mixing blades arranged in several planes and extending radially.
  • the mixing vanes are generally of substantially rectangular cross-section, this cross-sectional shape sometimes being tapered towards the front edge of the mixing blade, so that the mixing vanes have the overall shape of a flat, one-sided rectangular trapezium.
  • the leading edge of the mixing blades is the front edge in the direction of rotation of the corresponding rotor, which comes into engagement with the material to be mixed with the rotor rotating in front of the remaining parts of the mixing blade.
  • the base generally consists of one piece and is made of a relatively soft material. To protect against wear, it is known to apply wear elements on the base.
  • mixing blades are only interchangeable as a whole.
  • mixing blades having a detachable wearing element have already been described, but here the wearing elements have been screwed to the base part.
  • the wear element it would be possible, for example, for the wear element to be designed in the form of a sleeve so that it has a passage recess into which the base part can engage.
  • the outer contour of the base is slightly larger than the inner contour of the wear element, so cooled for mounting the base and / or the wear element must be heated, whereby the inner contour of the recess of the wear element widens and the wear element can be pushed over the base.
  • the wear element sits firmly on the base part, resulting in an elastic deformation of both the wear element and the base part.
  • the wear element If the wear element to be released again from the base, the wear element must be reheated and the base as possible cooled.
  • the elastic deformation of at least one element thus leads to a distortion of the wear element on the base part. It is not excluded that in addition to the elastic deformation takes place a plastic deformation.
  • sleeve-shaped wear element Under a sleeve-shaped wear element is also understood a wear element whose recess does not completely surround the base, but only partially. Therefore, "slotted" sleeves are also conceivable in the longitudinal direction, whereby the slot should extend in the circumferential direction by less than 180 °. Sleeve-shaped thus means any shape which is able to enclose the base part over a circumferential angle of more than 180 °.
  • an intermediate element is arranged between the wear element and the base part, wherein the intermediate element has a greater elasticity than the base part and wear element.
  • the intermediate element is then substantially elastically deformed, so that it is supported both on the base part and on the wear element.
  • the intermediate element may consist of a plastic, preferably of an elastomer and particularly preferably of a fluororubber.
  • the base part it would be possible for the base part to have circular grooves in which elastic O-rings are arranged so that the O-ring between the wear element on the one hand and the base part on the other hand is elastically deformed in the fastened state and thus makes it possible to fix the wear element to the base part. light.
  • an additional plastic deformation of the intermediate element may be desired.
  • the force exerted by the elastic deformation on another element should be greater than the force normally applied to the wear element during operation of the mixing blades.
  • the mixing vanes are fixed to a mixing shaft and the mixing shaft rotates about its axis, so that a centrifugal force is exerted on the mixing vanes, the force exerted by the elastic deformation should therefore be greater than the centrifugal force.
  • the base has an elongate shape with a longitudinal direction.
  • the intermediate element has an elongated shape with a longitudinal direction and the longitudinal direction of the intermediate element is arranged parallel or coaxial with the longitudinal direction of the base part.
  • the intermediate element may be an elongated rubber seal, which is elastically deformed between the base part and the wear element.
  • the mixing blade on a plurality of wear elements which are fastened or fixed in the longitudinal direction of the base in succession to the base.
  • This embodiment makes it possible for the wear elements to be used for mixing blades of different lengths, with mixing blades of greater length simply attaching more wear elements one after the other to the mixing blade.
  • at least one wear element has a passage recess and a wear element has a pocket recess.
  • the wear elements are first pushed onto the base part with a passage recess, so that the base part extends through the passage recess. Finally, the wear element is pushed with Sackaus Principleung on the base so that it covers the base completely like a kind of hood.
  • the intermediate element when the wear elements are attached to the base, the intermediate element contacts at least two wear elements. Particularly preferably, the intermediate element comes into contact with all the wear elements.
  • sealing elements are arranged between the wear elements, wherein the sealing elements are preferably made of plastic and best of all made of an elastomer. Alternatively, the sealing elements could also be made of silicone.
  • the sealing elements prevent in operation that dust or small components of the mixed material passes between adjacent wear elements and passes to the base or even between adjacent wear elements sets and pushes them apart.
  • the end surfaces should be made with high precision, so that as little dust as possible can pass to the base in operation between adjacent wear elements.
  • the intermediate element is arranged between the base part and the wear element such that the base part and the wear element do not touch each other.
  • base and wear element can be made of materials with significantly different coefficients of thermal expansion without problems in the operational heating of the mixing blade problems due to the different extent of the two elements, since then only the intermediate element more or less expands.
  • the wear element has a recess with an inner contour for receiving a base part
  • the base part has an outer contour
  • the inner contour of the recess of the wear element and the outer contour of the base are formed corresponding to each other so that when in the recess of the wear element Mentes inserted base part between the base and wear element at least partially remains a distance which is dimensioned such that an elastically deformed intermediate element can be accommodated.
  • the object mentioned at the outset is achieved by a base part having a fastening section which is intended to be connected to a shaft and a working section, wherein the working section is arranged on the fastening section, the base part having a jacket surface and a fastening section having opposite end face.
  • the lateral surface has at least one recess for receiving an intermediate element, wherein preferably the recess is designed as a groove extending from the fastening section via the working section to the end face, the groove preferably having a part-circular cross-section.
  • the base may have a substantially quadrangular cross-section, the groove preferably extending along an edge of the base.
  • the cross section may be exactly quadrangular, but embodiments are also conceivable in which the corners are rounded or individual sides are concave or convex curved.
  • the object mentioned is achieved by a wear element with a recess for receiving a base part, which forms an inner contour of the wear element.
  • the inner contour has at least one recess for receiving an intermediate element, wherein preferably the recess is a groove which extends along the recess, wherein best of all the groove has a part-circular cross-section.
  • the use of the wear element according to the invention does not exclude that the base also has a corresponding recess.
  • the intermediate element is then arranged such that it lies both in the recess of the base element and in the recess of the wear element.
  • the recess extends along a straight line and best along the entire length of the recess.
  • the recess extends along the entire wear element.
  • the recess can extend through the wear element, so that the wear element completely surrounds the base part when the base part is arranged in the recess.
  • the present invention also relates to a mixer with a mixing container and a mixer shaft to which at least one mixing blade of the type described is attached.
  • the mixing vessel rotates about a fixed mixer shaft.
  • both mixer shaft and mixing container rotate, in which case the mixer shaft is preferably arranged eccentrically in the mixing vessel, ie, the mixing vessel rotation axis and the mixer shaft axis are arranged spaced from each other.
  • the object mentioned at the outset is achieved by a method for fastening a wearing element to a base part of a mixing wing, having the following steps:
  • the base parts according to the invention wear elements, intermediate elements and mixing blades can be used.
  • the gap width does not have to be constant.
  • the gap could also be wedge-shaped.
  • FIG. 1 shows a perspective view of a basic part of a first embodiment
  • FIG. 2 shows a perspective view of a second embodiment of the base part with a pushed-on wear element
  • Figure 3 is a perspective view of the base of Figure 2, which is completely with
  • FIG. 4 shows a perspective view similar to FIG. 3, with the end piece being shown in a partially sectioned illustration
  • FIG. 5 shows a cross-sectional view through the embodiments of FIGS. 2 to 4,
  • FIG. 6 shows a sectional view through a third embodiment of the invention
  • FIG. 8 shows a sectional view through a fifth embodiment of the invention
  • FIG. 9 shows a sectional view through a sixth embodiment of the invention
  • FIG. 10 shows a perspective view of a basic part of a seventh embodiment of the invention
  • Figure 1 1 is a sectional view through a mixing blade of an eighth embodiment of the invention.
  • Figure 12 is a sectional view through a mixing blade of a ninth embodiment of the invention.
  • FIG. 1 shows a perspective view of a base part 1 of a first embodiment of the invention.
  • the base 1 has a mounting portion 2 with a bore 3.
  • the base can be fastened with its attachment portion 2 to a mixer shaft.
  • the base part 1 has a working section 4, which is delimited by an end face 5 facing away from the fastening section 2.
  • the working portion 4 has a substantially rectangular cross-section, wherein in the corners recesses 6 have been attached, which extend substantially over the entire length of the working portion 4 to the attachment portion 2.
  • FIG. 2 shows a second embodiment of a base part 1.
  • This embodiment differs from the embodiment shown in Figure 1 only by a threaded bore 16 and two holes 17 for receiving anti-rotation pins 12.
  • plastic cords 7 of fluorine rubber (FPM) are now inserted. If these plastic cords stretched in the longitudinal direction, so they reduce their cross-section. In the tensioned state, therefore, a wearing element 8 can be pushed with a passage opening over the base part 1 or its working section 4. As soon as the wear element 8 is in its desired position, the tension of the plastic cord 7 can be reduced so that the cross section expands again and the base part 1 and wear element 8 are braced against each other.
  • FPM fluorine rubber
  • FIG. 3 the state is shown in which two wear elements 8 have been pushed with through hole on the base 1.
  • a closure element 9 is screwed to the base 1.
  • FIG. 1 a partially sectioned view is shown in FIG. It can be seen that the closing element 9 by means of a screw 1 1, which is arranged in a stepped bore, is bolted to the base member 1. The stepped bore is closed by means of a cover 10.
  • pins 12 are provided which are positioned in corresponding bore in both the closing element 9 and the base element 1.
  • FIG. 5 shows a sectional view through the embodiment of FIGS. 2 to 4.
  • the cross-sectional area of the wear element 8 is substantially trapezoidal, but opposite corners are significantly rounded.
  • the outer contour can be freely selected and is trapezoidal here by way of example. It can be seen that the recesses 6 remain in the assembled state, but whose cross section is smaller than the cross section of the plastic cord in the relaxed state. By the four plastic cords, which are arranged in the corresponding recesses 6, the wear element 8 is held relative to the base 1 in its position, so that a gap between the base 1 and the wear element 8 forms and the two parts do not touch each other.
  • FIG. 6 shows a sectional view of a third embodiment of the invention.
  • a wear element 9 has been pushed over the base 1 here as well.
  • a further wear element 13 is arranged here.
  • This wearing element 13 is pushed over the frontal region of the base part 1 in such a way that it projects beyond the edge of the base part facing away from the fastening section.
  • a frontal recess 18 is formed in the mixing blade, which can either remain empty so that it can be filled with mix, or with another material, such as e.g. Building foam, can be completed.
  • a sealing element 14 is provided between the two wear elements 8 and 13, to prevent that accumulates powdery material between the sleeves and these apart with time.
  • the requirements for the flatness of the end faces of the wear elements can be reduced by this measure.
  • FIG. 7 shows a fourth embodiment of the invention. You can only see a cross section.
  • the wear element 8 ' is shown here with a different cross-sectional shape. It has a substantially rectangular recess with rounded corners.
  • longitudinally extending recesses 6 are introduced, are inserted in the plastic cords 7.
  • FIG. 8 shows a fifth embodiment of the invention. This embodiment essentially differs from the embodiment in Figure 7 in that the recesses 6 are mounted not only in the base part 1, but also in the wear element 8 "Alternatively, the recesses 6 could also be arranged only in the wear element 6 shows the sixth embodiment of the invention, from which it can be seen that the wearing element 8 "'does not necessarily have to completely enclose the base part 1.
  • the remaining slot can either remain open or be foamed, for example.
  • the slot is provided at a position at which no wear is expected during operation, so that no wear element must be present here.
  • FIG. 1 shows a sectional view through a mixing blade according to an eighth embodiment of the invention.
  • the base part does not have a rectangular cross section but a trapezoidal cross section.
  • FIG. 12 shows a sectional view through a mixing blade according to a ninth embodiment of the invention.
  • the base part 1 "" has guide ribs 19 on both sides, which engage in corresponding guide grooves 20 in the wear element 8 ""'and mount the wear element 8 ""' on the base part V ". facilitate. reference numeral

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

La présente invention concerne une ailette de mélange constituée d'une partie de base (1) pouvant être fixée à un arbre et d'un élément d'usure (8), l'élément d'usure (8) étant fixé ou pouvant être fixé de manière amovible à la partie de base (1). L'invention vise à fournir une ailette de mélange qui permet de séparer facilement l'élément d'usure (8) de la partie de base (1). À cet effet, afin de fixer l'élément d'usure (8) à la partie de base (1), au moins un élément parmi le groupe constitué de l'élément d'usure (8), de la partie de base (1) et d'un élément intermédiaire disposé éventuellement au moins partiellement entre l'élément d'usure (8) et la partie de base (1) est déformé élastiquement de telle sorte qu'il exerce une force sur un autre élément du groupe.
EP17822573.6A 2016-12-07 2017-12-05 Ailette de mélange comprenant un élément d'usure ainsi que procédé permettant de fixer un élément d'usure à une partie de base d'une ailette de mélange Withdrawn EP3551323A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016123712.4A DE102016123712A1 (de) 2016-12-07 2016-12-07 Mischflügel mit Verschleißelement sowie Verfahren zum Befestigen eines Verschleißelementes an einem Grundteil eines Mischflügels
PCT/EP2017/081482 WO2018104286A1 (fr) 2016-12-07 2017-12-05 Ailette de mélange comprenant un élément d'usure ainsi que procédé permettant de fixer un élément d'usure à une partie de base d'une ailette de mélange

Publications (1)

Publication Number Publication Date
EP3551323A1 true EP3551323A1 (fr) 2019-10-16

Family

ID=60888365

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17822573.6A Withdrawn EP3551323A1 (fr) 2016-12-07 2017-12-05 Ailette de mélange comprenant un élément d'usure ainsi que procédé permettant de fixer un élément d'usure à une partie de base d'une ailette de mélange

Country Status (4)

Country Link
EP (1) EP3551323A1 (fr)
CN (1) CN110049812B (fr)
DE (1) DE102016123712A1 (fr)
WO (1) WO2018104286A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202019100903U1 (de) 2019-02-18 2019-03-12 Akw Apparate + Verfahren Gmbh Vorrichtung zur Reinigung verunreinigter Stoffe durch Attrition mittels Rühren in feststoffreichen Suspensionen

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Also Published As

Publication number Publication date
WO2018104286A1 (fr) 2018-06-14
CN110049812B (zh) 2021-11-16
DE102016123712A1 (de) 2018-06-07
CN110049812A (zh) 2019-07-23

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