FR2668718A3 - Centrifugal shredding machine - Google Patents

Centrifugal shredding machine Download PDF

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Publication number
FR2668718A3
FR2668718A3 FR9113436A FR9113436A FR2668718A3 FR 2668718 A3 FR2668718 A3 FR 2668718A3 FR 9113436 A FR9113436 A FR 9113436A FR 9113436 A FR9113436 A FR 9113436A FR 2668718 A3 FR2668718 A3 FR 2668718A3
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FR
France
Prior art keywords
blade
shredding machine
wear
turbine
knives
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
Application number
FR9113436A
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French (fr)
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FR2668718B3 (en
Inventor
Pessa Luciano
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PESSA SpA
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PESSA SpA
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Filing date
Publication date
Application filed by PESSA SpA filed Critical PESSA SpA
Publication of FR2668718A3 publication Critical patent/FR2668718A3/en
Application granted granted Critical
Publication of FR2668718B3 publication Critical patent/FR2668718B3/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27LREMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L11/00Manufacture of wood shavings, chips, powder, or the like; Tools therefor
    • B27L11/005Tools therefor

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Centrifugal Separators (AREA)

Abstract

The centrifugal shredding machine comprises a hollow cylindrical container (1) equipped with a series of knives (3) located on the internal circumferential wall, and a turbine (wheel) (4) inside the container and equipped with several vanes (5), each one including a mating knife (bedknife) projecting laterally and outwardly. It is characterised in that each vane (5) of the turbine (4) is equipped with a removable anti-wear protection plate (6), and the mating knife of the said vane is fixed to the end of the vane (5) by means of an anti-wear blocking plate.

Description

Machine à déchiqueter centrifuge
La présente invention concerne une machine à déchiqueter centrifuge.
Centrifugal shredding machine
The present invention relates to a centrifugal shredding machine.

Des machines à déchiqueter des petits morceaux de bois (chips) sont connues. Généralement elles comprennent un conteneur cylindrique tournant ou non tournant creux muni d'une série de couteaux disposés sur la paroi circonférentielle intérieure sur laquelle sont lancés, par effet de la force centrifuge, les morceaux de bois provenant d'une turbine logée à l'intérieur du conteneur. En particulier, chaque aube de la turbine intérieure est munie à son extrémité d'un contre-couteau, fixé à l'aube par des vis, prévu pour presser les morceaux de bois contre les couteaux du conteneur. Machines for shredding small pieces of wood (chips) are known. Generally they comprise a hollow rotating or non-rotating cylindrical container provided with a series of knives arranged on the inner circumferential wall on which are thrown, by effect of centrifugal force, the pieces of wood coming from a turbine housed inside of the container. In particular, each blade of the inner turbine is provided at its end with a counter knife, fixed to the blade by screws, intended to press the pieces of wood against the knives of the container.

Ces machines à déchiqueter connues présentent toutefois certains inconvénients et-notamment - une usure importante des aubes de la turbine intérieure et des contre-couteaux fixés sur les aubes, - un fonctionnement et un réglage difficiles des contre-couteaux en raison même de leur système de fixation sur les aubes, - l'obtention d'un produit final de qualité médiocre (copeau) parce que la position des morceaux de bois au moment de la coupe est due au hasard et que leurs fibres ne sont pas parallèles au tranchant des couteaux comme cela serait nécessaire pour pouvoir obtenir un produit de bonne qualité. These known shredding machines have certain drawbacks, however - and in particular - significant wear of the blades of the internal turbine and the counter knives attached to the blades, - difficult operation and adjustment of the counter knives because of their system of fixation on the blades, - obtaining a final product of poor quality (chip) because the position of the pieces of wood at the time of cutting is due to chance and their fibers are not parallel to the edge of the knives as this would be necessary in order to obtain a good quality product.

D'autre part, la solution qui consiste à compenser l'usure des aubes par des reports de soudure anti-usure s'est avérée inefficace car elle est difficile à mettre en oeuvre et les résultats obtenus ne sont pas satisfaisants les reports déséquilibrent la turbine et ses paliers de support sont soumis à des vibrations et à des contraintes qui, à leur tour, affectent la qualité du produit final.  On the other hand, the solution which consists in compensating for the wear of the blades by anti-wear weld deferrals has proved ineffective since it is difficult to implement and the results obtained are not satisfactory the deferrals unbalance the turbine and its support bearings are subject to vibrations and stresses which, in turn, affect the quality of the final product.

Ces inconvénients sont éliminés grâce à la machine à déchiqueter centrifuge selon l'invention comprenant un conteneur cylindrique creux muni d'une série de couteaux disposés sur la paroi circonférentielle intérieure, et une turbine à l'intérieur du conteneur et munie de plusieurs aubes comportant chacune un contre-couteau saillant latéralement et extérieurement, caractérisée en ce que chaque aube de la turbine est munie d'une plaque amovible de protection anti-usure, et le contre-couteau de ladite aube est fixé à l'extrémité de l'aube au moyen d'une plaque de blocage anti-usure. These drawbacks are eliminated thanks to the centrifugal shredding machine according to the invention comprising a hollow cylindrical container provided with a series of knives arranged on the inner circumferential wall, and a turbine inside the container and provided with several blades each comprising a counter-knife projecting laterally and externally, characterized in that each blade of the turbine is provided with a removable anti-wear protection plate, and the counter-knife of said blade is fixed to the end of the blade at by means of an anti-wear blocking plate.

Selon d'autres caractéristiques de l'invention
- la plaque de protection anti-usure peut être fixée sur l'aube par des boulons,
- la plaque de blocage anti-usure peut être fixée sur l'aube par des vis,
- le contre-couteau peut être disposé dans un logement situé sur l'aube.
According to other features of the invention
- the anti-wear protection plate can be fixed to the blade by bolts,
- the anti-wear blocking plate can be fixed to the blade by screws,
- the counter knife can be placed in a housing located on the blade.

D'autres avantages de la présente invention apparaîtront plus clairement à la lecture de la description qui suit de réalisation préférée de l'invention en référence aux dessins annexés correspondants dans lesquels
- la figure 1 est une vue schématique partielle d'une machine à déchiqueter selon l'invention; et
- la figure 2 est une vue en coupe transversale agrandie d'une aube de la turbine.
Other advantages of the present invention will appear more clearly on reading the description which follows of the preferred embodiment of the invention with reference to the corresponding appended drawings in which
- Figure 1 is a partial schematic view of a shredding machine according to the invention; and
- Figure 2 is an enlarged cross-sectional view of a blade of the turbine.

Comme le montrent les figures, la machine à déchiqueter selon l'invention comprend essentiellement un panier cylindrique creux 1 muni sur la paroi circonférentielle intérieure de plusieurs porte-couteaux 2 fixés aux couteaux correspondants 3. As the figures show, the shredding machine according to the invention essentially comprises a hollow cylindrical basket 1 provided on the inner circumferential wall with several knife holders 2 fixed to the corresponding knives 3.

A l'intérieur du panier 1 est disposée une turbine 4 dont la surface circonférentielle extérieure est revêtue d'acier anti-usure et qui est munie de plusieurs aubes 5 réalisées de préférence en acier. Inside the basket 1 is arranged a turbine 4 whose outer circumferential surface is coated with anti-wear steel and which is provided with several blades 5 preferably made of steel.

Chaque aube 5 est munie, dans sa partie la plus intérieure et sur le côté tourné dans le sens de la rotation de la turbine, d'une petite plaque de protection anti-usure 6 fixée sur l'aube par des boulons 7. Each blade 5 is provided, in its innermost part and on the side turned in the direction of rotation of the turbine, with a small anti-wear protection plate 6 fixed to the blade by bolts 7.

En outre, à chaque aube 5 correspond, toujours du même côté, mais à l'extérieur, un logement 8 dans lequel est disposé un contre-couteau correspondant 9 réalisé en acier. In addition, each blade 5 corresponds, always on the same side, but outside, a housing 8 in which is disposed a corresponding counter knife 9 made of steel.

Le contre-couteau 9 est maintenu dans son logement par une plaque 10, également réalisée en acier anti-usure et munie de vis 11 de blocage sur l'aube 5.The counter knife 9 is held in its housing by a plate 10, also made of wear-resistant steel and provided with screws 11 for locking on the blade 5.

Le mode d'utilisation de la machine à déchiqueter est identique à celui des machines traditionnelles
Les morceaux de bois sont injectés à l'intérieur de la turbine 4 à travers un collecteur d'alimentation équipé d'un système magnétique et de sélection qui élimine les corps métalliques et étrangers. La rotation rapide de la turbine aspire et lance les morceaux de bois, les pressant contre les couteaux 3 du panier extérieur. La partie des couteaux qui dépasse ayant été préalablement réglée, on obtient des copeaux plats, de l'épaisseur souhaitée, qui sont déchargés par la partie inférieure de la machine.
The mode of use of the shredding machine is identical to that of traditional machines
The pieces of wood are injected inside the turbine 4 through a supply manifold equipped with a magnetic and selection system which eliminates metallic and foreign bodies. The rapid rotation of the turbine sucks and launches the pieces of wood, pressing them against the knives 3 of the outer basket. The part of the knives which protrudes having been previously adjusted, flat shavings of the desired thickness are obtained, which are discharged from the lower part of the machine.

En cas d'usure de la plaque 6, celle-ci peut être facilement remplacée en desserrant les boulons 7. In the event of wear of the plate 6, it can be easily replaced by loosening the bolts 7.

S'il s 'avère nécessaire de remplacer les contre-couteaux 9, cette opération peut être effectuée facilement en desserrant les vis de blocage 11 et en dégageant ensuite axialement le contre-couteau 9 de son siège 8 afin de le remplacer par un autre. I1 est évident qu'en cas d'usure de la plaque 10, celle-ci peut être remplacée en retirant toutes les vis 11. If it proves necessary to replace the counter knives 9, this operation can be carried out easily by loosening the locking screws 11 and then axially disengaging the counter knife 9 from its seat 8 in order to replace it with another. It is obvious that in the event of wear of the plate 10, it can be replaced by removing all the screws 11.

Il apparaît clairement de ce qui précède que la machine à déchiqueter centrifuge selon l'invention permet d'obtenir de nombreux avantages, parmi lesquels - la remise en état rapide du profil de l'aube assurant l'équilibre parfait des masses en rotation, - le remplacement rapide des contre-couteaux et/ou des plaques d'usure de blocage sur les aubes, - l'obtention d'un produit final de meilleure qualité car la plaque anti-usure a également pour fonction de faciliter le placement des morceaux de bois avec les fibres parallèles au tranchant des couteaux.  It is clear from the above that the centrifugal shredding machine according to the invention makes it possible to obtain numerous advantages, among which - the rapid restoration of the blade profile ensuring the perfect balance of the rotating masses, - the rapid replacement of the counter-blades and / or the wear plates for locking on the blades, - obtaining a final product of better quality because the anti-wear plate also has the function of facilitating the placement of the pieces of wood with fibers parallel to the edge of the knives.

Claims (4)

REVENDICATIONS 1. Machine à déchiqueter centrifuge comprenant un conteneur cylindrique creux (1) muni d'une série de couteaux (3) disposés sur la paroi circonférentielle intérieure, et une turbine (4) à l'intérieur du conteneur et munie de plusieurs aubes (5) comportant chacune un contre-couteau (9) saillant latéralement et extérieurement, caractérisée en ce que chaque aube (5) de la turbine (4) est munie d'une plaque amovible de protection anti-usure (6), et le contre-couteau (9) de ladite aube est fixé à l'extrémité de l'aube (5) au moyen d'une plaque de blocage anti-usure (10). 1. Centrifugal shredding machine comprising a hollow cylindrical container (1) provided with a series of knives (3) arranged on the inner circumferential wall, and a turbine (4) inside the container and provided with several blades (5 ) each comprising a counter-knife (9) projecting laterally and externally, characterized in that each blade (5) of the turbine (4) is provided with a removable anti-wear protection plate (6), and the counter knife (9) of said blade is fixed to the end of the blade (5) by means of an anti-wear blocking plate (10). 2. Machine à déchiqueter selon la revendication 1, caractérisée en ce que la plaque de protection anti-usure (6) est fixée sur l'aube (5) par des boulons (7). 2. A shredding machine according to claim 1, characterized in that the anti-wear protection plate (6) is fixed to the blade (5) by bolts (7). 3. Machine à déchiqueter selon la revendication 1 ou 2, caractérisée en ce que la plaque de blocage anti-usure (10) est fixée sur l'aube (5) par des vis (11). 3. A shredding machine according to claim 1 or 2, characterized in that the anti-wear blocking plate (10) is fixed to the blade (5) by screws (11). 4. Machine à déchiqueter selon l'une des revendications 1 à 3, caractérisée en ce que le contre-couteau (9) est disposé dans un logement (8) situé sur l'aube (5).  4. A shredding machine according to one of claims 1 to 3, characterized in that the counter knife (9) is disposed in a housing (8) located on the blade (5).
FR9113436A 1990-11-06 1991-10-30 CENTRIFUGAL SHREDDING MACHINE. Expired - Lifetime FR2668718B3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT6196990U IT221203Z2 (en) 1990-11-06 1990-11-06 CENTRIFUGAL CHIPPING MACHINE

Publications (2)

Publication Number Publication Date
FR2668718A3 true FR2668718A3 (en) 1992-05-07
FR2668718B3 FR2668718B3 (en) 1992-09-25

Family

ID=11293121

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9113436A Expired - Lifetime FR2668718B3 (en) 1990-11-06 1991-10-30 CENTRIFUGAL SHREDDING MACHINE.

Country Status (3)

Country Link
DE (1) DE9103035U1 (en)
FR (1) FR2668718B3 (en)
IT (1) IT221203Z2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107790278A (en) * 2017-08-10 2018-03-13 合肥富通环保新能源科技有限公司 A kind of piece-rate system for house refuse Geldart-D particle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI86973C (en) * 1991-05-10 1992-11-10 Kone Oy MOTKNIV FOER ANVAENDNING I EN FLISHUGG
WO1999059784A2 (en) * 1998-05-16 1999-11-25 B. Maier Zerkleinerungstechnik Gmbh Blade ring cutter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107790278A (en) * 2017-08-10 2018-03-13 合肥富通环保新能源科技有限公司 A kind of piece-rate system for house refuse Geldart-D particle

Also Published As

Publication number Publication date
FR2668718B3 (en) 1992-09-25
IT9061969U1 (en) 1992-05-06
IT9061969V0 (en) 1990-11-06
IT221203Z2 (en) 1994-02-16
DE9103035U1 (en) 1991-06-13

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