EP1543922A1 - Schleuderrad mit austauschbaren Schaufeln - Google Patents

Schleuderrad mit austauschbaren Schaufeln Download PDF

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Publication number
EP1543922A1
EP1543922A1 EP03447289A EP03447289A EP1543922A1 EP 1543922 A1 EP1543922 A1 EP 1543922A1 EP 03447289 A EP03447289 A EP 03447289A EP 03447289 A EP03447289 A EP 03447289A EP 1543922 A1 EP1543922 A1 EP 1543922A1
Authority
EP
European Patent Office
Prior art keywords
pallet
turbine
axis
shot
active
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Withdrawn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
EP03447289A
Other languages
English (en)
French (fr)
Inventor
Léon Rutten
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.)
Rutten SA-NV
Original Assignee
Rutten SA-NV
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 Rutten SA-NV filed Critical Rutten SA-NV
Priority to EP03447289A priority Critical patent/EP1543922A1/de
Priority to PCT/BE2004/000162 priority patent/WO2005065887A1/fr
Publication of EP1543922A1 publication Critical patent/EP1543922A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/06—Impeller wheels; Rotor blades therefor
    • B24C5/062—Rotor blades or vanes; Locking means therefor

Definitions

  • the present invention relates to a blasting turbine for centrifugal projection to high speed shot, such as round shot, angular hardness, glass beads, etc.
  • This type of turbine is used in a whole series of applications, by specific adaptation of the spray jet, for example starting from the most concentrated jet to the widest: rolling mill rolls, shot peening , foundry (cleaning of parts) and metal construction (stripping before painting), shot blasting, etc.
  • the pallets possess generally a single active surface, flat and wide uniform, which extends between a first end adjacent to that axis for the initial support of the shot to be shot and a distant second end of said axis for the final ejection thereof. For some reasons of balance, these pallets are usually arranged in pairs.
  • vane turbines straight lines arranged radially to the axis of rotation, so compared to the distribution device, and which have two potentially active surfaces.
  • the pallets can therefore rotate in both directions of rotation or simply be returned in the turbine so to also use the other active face, when a single sense of rotation is imposed.
  • Centrifugal shot blasting turbines have for the purpose of projecting the shot with the largest possible speed while maintaining rotational speed within reasonable limits (1500 to 3000 revolutions / minute) and with the best resistance to wear due to the abrasion of the shot on the active faces of pallets.
  • a first evolution of turbines centrifugal shot blasting was brought by the replacement of the straight pallets by profiled pallets curve, for example concave or alternatively convex and concave (see for example US-A-4,277,965, DE-A-44 09 690, etc.).
  • the single curved pallet offers, besides a high projection speed for a moderate rotation speed, wear resistance exceptional when these pallets are made in specific alloys with ultra-high hardness such as carbide tungsten, ceramic, etc.
  • the present invention aims to propose a solution that makes it possible to overcome the disadvantages of the state of the art.
  • the invention aims to reconcile in a single solution the advantages of turbines one-sided curved shot blasting with the advantages of straight pallets with two active faces.
  • An object of the invention is therefore to propose a palette capable of projecting the shot at a speed almost identical to the speed of the curved palette, so more efficient about 25% in the resulting speed compared to the right pallet, for the same diameter of turbine and the same speed of rotation, but having the particularity to have two active faces, so to be reversible.
  • a first object of the present invention relates to a pallet for high shot blast turbine speed, mounted essentially radially on a rotor to be rotated about an axis of it, and of which at least one wearing surface or active surface extends between a first proximal end of said axis where is performed taking care of the shot and a second end distal of said axis where is performed ejection of the shot, characterized in that the pallet has two active surfaces at least partially curved, concave and turning their concavity in essentially opposite directions.
  • each active surface comprises in addition a straight part.
  • the right part leads to the said proximal end of the axis and the concave portion leads to said distal end of the axis.
  • the invention is concretized in a manner advantageous because the pallet comprises a trunk common from the proximal end of the extended axis by two distinct branches ending in the end distal to the axis.
  • the curvatures of both active surfaces may be the same or different.
  • the pallet has a symmetry with respect to the radial position in which the pallet is positioned in the turbine.
  • the curvature of one of the two active surfaces can tend to infinity, that is to say that one of the two active surfaces is essentially right.
  • Another advantageous feature of the invention is that the tangents to the two active surfaces curves at the centrifugal exhaust of the shot form between them an angle ⁇ between 30 and 180 °, and preferably between 60 and 120 °.
  • each slices of the pallet has a reinforcement or tenon for fixing the pallet in grooves machined in turbine flanges.
  • the two parts of active surface limiting the common core of the pallet are straight and form a small angle ⁇ between them, preferably limited to 5 °.
  • the right common core has a length between 20 and 80%, and preferably between 40 and 60% of the total length of the pallet.
  • the thickness of the common core grows with the distance to the outside, from the edge of entrance.
  • trunk common right may also not be present, each active surfaces then being entirely curved.
  • the internal faces of the two aforementioned branches of the pallet which are therefore not active, are connected, at the level of a region called "chalice", by a circular connection, able to marry exactly the shape of a machined groove in the face internal flange or that of an abutment axis or a end of axis-stop.
  • the pallet can be produced aforesaid cast steel alloy or forged treated, but preferably ultra-hard alloy such as carbide tungsten, without being limiting to the invention, or ceramic.
  • said pallets are secured to flanges by embedding them in grooves machined on the inner face of each flange and marrying the shape of the palette.
  • said pallets are secured to the flanges by means of abutment pins or ends of abutment axes and small recesses machined in the flanges to accommodate the foot of the pallets.
  • each pallet is positioned on the rotor of way such that an axis of the pallet is mounted translated of a given distance, in the direction of rotation, by relative to the radial while being parallel to it.
  • This configuration allows support for the shot at the foot of each pallet with a zero shock, if the distance is chosen appropriately.
  • the speed of ejection of shot at the outlet of the turbine is between 40 and 200 m / s
  • the speed of rotation of the turbine is between 1000 and 5000 rpm, preferably between 1500 and 3000 rpm.
  • the diameter of the flanges, and therefore the total diameter of the turbine is between 200 and 600 mm.
  • a third subject of the invention concerns a flange for blast turbine as described above, said flange comprising a plurality of openings Circulars made through the flange for laying axes-abutment or stop-axis ends and a plurality of aforementioned small fittings or a plurality of supporting grooves adapted to the contour of the pallets, and in particular the pins provided for this purpose. These grooves are machined on the inner surface side of the flange for embedding the pallets of the invention.
  • Figure 1 already mentioned, represents schematically a sectional view of a form of execution a "gamma" shape pallet according to the present invention.
  • Figure 2 schematically represents the pallet of Figure 1 integrated into machined grooves in the flanges.
  • Figure 3 shows a flange section machined to accommodate said pallet.
  • Figure 4 schematically represents two other methods of fixing pallets.
  • the calyx of the pallet is supported on an axis-stop fixed by the two flanges enclosing the pallet.
  • Figure 4b we have the same layout where the thrust axis is replaced by two ends of abutment pins located in each flange.
  • Figure 5 shows a palette where the parts straight lines disappeared and are replaced by curves continuous extending to the foot of the pallet.
  • Figure 6 shows a two-sided pallet in accordance with the invention but offset from the radial for zero shock support at the foot of the palette.
  • Figure 7 shows a palette of which one first active face consists of a straight part and of a curved part and of which a second active face is straight.
  • the so-called "gamma” shape pallet the object of the present invention combines the high output speeds with two active faces 2, 2 'allowing to rotate the turbine indifferently in one direction or in the other, or just giving the possibility to return the pallet in the turbine for get a doubled life for the pallet.
  • the pallet 1 for blast turbine is characterized by a rectilinear portion 3 having a length The corresponding to a fraction of the total length L of pallet, which is close to the difference between largest radius R and the smallest radius r of the flange 10 (see Figure 1).
  • This straight part is extended by two curved parts 3 ', 3 "offering ejection speeds significantly larger than a straight pallet mounted in a turbine of the same diameter and rotating at the same speed.
  • the angle ⁇ formed by the two tangent to the escape of the shot at the level of two active faces must be between 60 and 120 °, said angle depending on the diameter of the turbine in question and the desired performance.
  • An angle ⁇ lower than 60 ° or greater than 120 ° may also be suitable but making a less suitable palette drawing.
  • the pallet In the case of an angle ⁇ lower than 60 °, for example, the pallet has very large wings long. Moreover, in the case of a larger angle ⁇ than 120 °, the wings of exit are very curved and are therefore much more sensitive to wear.
  • the blasting turbine pallet includes a common part supporting both sides active in the palette.
  • the two active faces of this common part are advantageously straight and form a slight angle ⁇ between them, for example between 1 and 5 °.
  • An angle ⁇ 0 could also be suitable but with of useless material.
  • the length L 'of the part common right represents a fraction between 40 and 60% of the total length L of the pallet.
  • the "gamma" pallets 1 are advantageously secured to flanges 10, by means of grooves 11 machined in each flange and marrying the shape of the tenons 4 and 4 '(Fig. 1) of the pallet. Studs 4 and 4 'create a channel that keeps the shot on the active side and thus prevent the use of flanges in the area close to the active face of the pallet, or active faces when the turbine rotates in both directions of rotation.
  • Figures 4a and 4b show another arrangement where the flanges do not have grooves, of "gamma” form but are held radially by complete thrust axes 13 or end stops 14, 14 'leaning in the bottom of the chalice 12 of the pallet while the foot of the pallet 5 gets into a small groove 16 prevents the pallet from rotating around the axis 13 or 14, 14 '.
  • the pallet is made in such a way that the faces internal, therefore not active, of the two curved parts 3 ', 3 " are connected in a circular connection 12, in which just fits the edge of the grooves 15 or in the other mode of attachment, the axis-abutment 13 or the ends stop axis 14, 14 '(FIGS. 3, 4a and 4b).
  • the pallet presents a first active face which consists of a straight part and a curved part, as described above, and a second active face straight.
  • This embodiment can be used in turbines intended to rotate at two different speeds, or having to offer differentiated performances, according to the direction of rotation adopted.
EP03447289A 2003-12-15 2003-12-15 Schleuderrad mit austauschbaren Schaufeln Withdrawn EP1543922A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP03447289A EP1543922A1 (de) 2003-12-15 2003-12-15 Schleuderrad mit austauschbaren Schaufeln
PCT/BE2004/000162 WO2005065887A1 (fr) 2003-12-15 2004-11-12 Turbine de grenaillage a hautes performances equipee de palettes reversibles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03447289A EP1543922A1 (de) 2003-12-15 2003-12-15 Schleuderrad mit austauschbaren Schaufeln

Publications (1)

Publication Number Publication Date
EP1543922A1 true EP1543922A1 (de) 2005-06-22

Family

ID=34486583

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03447289A Withdrawn EP1543922A1 (de) 2003-12-15 2003-12-15 Schleuderrad mit austauschbaren Schaufeln

Country Status (2)

Country Link
EP (1) EP1543922A1 (de)
WO (1) WO2005065887A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2650084A1 (de) 2012-04-11 2013-10-16 Straaltechniek International N.V./S.A. Turbine
EP2826593A1 (de) * 2013-07-19 2015-01-21 Prefer - Equipamentos Para Decapagem LDA. Strahlturbine und Komponenten
CN106425886A (zh) * 2016-11-04 2017-02-22 济南大学 Y型叶片抛丸器
CN106425885A (zh) * 2016-11-04 2017-02-22 济南大学 V型叶片抛丸器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015101485A1 (de) * 2015-02-02 2016-08-04 Rösler Holding GmbH & Co. KG Schleuderrad

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU427848A1 (ru) * 1972-01-04 1974-05-15 Лопасть ротора дробеметного аппарата
FR2252174A1 (en) * 1973-11-22 1975-06-20 Fischer Ag Georg Slinger wheel for polishing granular plastics material - blades have radial portion followed by cranked portion
US4069025A (en) * 1975-10-24 1978-01-17 Tilghman Wheelabrator Limited Blast impellor wheels
DE4409690A1 (de) * 1993-03-24 1994-09-29 Leon Rutten Kugelstrahlturbine
DE10104703C1 (de) * 2001-02-02 2001-12-06 Schlick Jennifer Schleuderradanordnung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU427848A1 (ru) * 1972-01-04 1974-05-15 Лопасть ротора дробеметного аппарата
FR2252174A1 (en) * 1973-11-22 1975-06-20 Fischer Ag Georg Slinger wheel for polishing granular plastics material - blades have radial portion followed by cranked portion
US4069025A (en) * 1975-10-24 1978-01-17 Tilghman Wheelabrator Limited Blast impellor wheels
DE4409690A1 (de) * 1993-03-24 1994-09-29 Leon Rutten Kugelstrahlturbine
DE10104703C1 (de) * 2001-02-02 2001-12-06 Schlick Jennifer Schleuderradanordnung

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2650084A1 (de) 2012-04-11 2013-10-16 Straaltechniek International N.V./S.A. Turbine
US9206698B2 (en) 2012-04-11 2015-12-08 Straaltechniek International N.V/S.A. Turbine
EP2826593A1 (de) * 2013-07-19 2015-01-21 Prefer - Equipamentos Para Decapagem LDA. Strahlturbine und Komponenten
EP2829362A1 (de) * 2013-07-19 2015-01-28 Prefer - Equipamentos Para Decapagem, Lda. Schaufel für eine Steuerung für eine Sandstrahlturbine und Komponenten
CN106425886A (zh) * 2016-11-04 2017-02-22 济南大学 Y型叶片抛丸器
CN106425885A (zh) * 2016-11-04 2017-02-22 济南大学 V型叶片抛丸器

Also Published As

Publication number Publication date
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