EP2946882A1 - Impulseur d'alimentation en agent de grenaillage d'une turbine de grenaillage - Google Patents

Impulseur d'alimentation en agent de grenaillage d'une turbine de grenaillage Download PDF

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Publication number
EP2946882A1
EP2946882A1 EP15001438.9A EP15001438A EP2946882A1 EP 2946882 A1 EP2946882 A1 EP 2946882A1 EP 15001438 A EP15001438 A EP 15001438A EP 2946882 A1 EP2946882 A1 EP 2946882A1
Authority
EP
European Patent Office
Prior art keywords
impeller
blades
radially
interior
section
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Withdrawn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
EP15001438.9A
Other languages
German (de)
English (en)
Inventor
Jost Wadephul
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP2946882A1 publication Critical patent/EP2946882A1/fr
Withdrawn legal-status Critical Current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
    • B24C5/068—Transferring the abrasive particles from the feeding means onto the propeller blades, e.g. using central impellers

Definitions

  • the invention relates to an impeller for feeding blasting agent to be accelerated in the blast wheel of a blasting system, wherein the impeller is designed as a blade wheel rotatable about a longitudinal central axis and can be arranged in the central region of the impeller, wherein the impeller formed by one of several or all blades, of these at least radially outwardly limited interior has, which extends up to a feed end formed by the blades with feed opening, through which the interior of a blasting medium source derived blasting agent can be fed.
  • the invention further relates to a blasting device for the mechanical surface irradiation of workpieces with a blast wheel and such, in the central region arranged impeller.
  • the object of the invention is to reduce the abrasion caused by the blasting agent of the impeller and at the same time to produce a spray pattern with uniform coverage over the entire ejection angle of the blasting agent from the blast wheel with approximately parallel side boundary.
  • blades of the impeller of the type mentioned are formed so that in cross-section each of the vanes limited interior surface in at least one (other) interior section is greater than at the formed by the blades, in particular in the region of an axial End of the impeller arranged feed end.
  • the feed port at the feed end forms part of the interior space formed by the blades by forming the axial end of this interior space. Accordingly, at least a portion of the formed interior space is widened compared to the inlet opening of the interior formed by the blades. Surprisingly, it has been shown that as a result of the wear of the impeller is significantly reduced.
  • the individual blades are arranged on at least one side pane of the impeller.
  • the blades are furthermore preferably distributed with a certain, in particular in each case identical, angular distance from each other over the side window.
  • each case radially standing, ie pointing in cross section in a radial direction.
  • they can furthermore each extend perpendicularly to the side window in the axial direction and in this case run in different planes positioned at an angle to each other, each extending parallel to the longitudinal central axis.
  • the blades of the impeller preferably each have at least in the region in which they define the interior, via a free, radially inwardly arranged blade end. These radially inwardly arranged blade ends of the blades then bound together radially outside the regularly around the longitudinal center axis rotationally symmetrical interior formed. In cross section, the free blade ends are arranged distributed along a common circle.
  • the blade ends surrounding the interior radially on the outside expediently do not form a closed boundary surface, but in each case adjacent blade ends are arranged at a distance from one another.
  • a channel can pass through the blasting agent from radially inward to radially outward.
  • contour lines In a longitudinal section of the interior according to the invention preferably between two imaginary, radially spaced, formed by the corresponding radially inwardly arranged blade ends or limited contour lines positioned. Both contour lines extend at least in a portion of the inner space from the feed end or from the feed opening of the feed end in the direction of an opposite axial impeller end. Furthermore, the contour lines run radially further outward in at least one section than at their respective end point at the feed end.
  • the interior can be formed by appropriate design of the blades further such that the aforementioned contour lines in the aforementioned longitudinal section each have at least one curved portion which extends radially outward than the end point of the respective contour line at the feed end or at the feed opening of the feed end.
  • the interior is shaped in such a way that the contour lines each have at least two rectilinear sections, namely via a first section extending from radially further inward to radially further outward and another, in particular directly adjacent thereto , from radially further outward to radially further inwardly extending portion, wherein the radial further inside radially further outwardly extending portion is arranged closer to the feed end than the further, from radially further outward to radially further inside extending portion.
  • the blasting device 10 for mechanical surface irradiation of workpieces has a blast wheel 12 which can be set in rapid rotation along a central axis by means of a motor 11.
  • an auxiliary spinner wheel which is designed as a paddle wheel, i. an impeller 14 is arranged. This is also set in rotation during operation of the jet device 10.
  • the use of auxiliary centrifugal wheels or impellers in connection with blast machines having blast wheels is well known in the art.
  • the impeller 14 is seated in a likewise known, stationary dispensing sleeve 16 with discharge opening.
  • An inlet pipe 18 opens into an inlet end 20 of the impeller arranged at an axial impeller end. Via the inlet pipe 18, a presently circular feed opening 20a of the feed end 20 is supplied from the outside blasting agents such as quartz sand or steel shot.
  • the individual blades 13 of the impeller 14 accelerate in the operation of the blasting machine the blasting agent supplied to this radially outward.
  • the part of the blasting medium whose trajectory caused by the impeller has suitable directional components exits from an unillustrated upper or radial opening of the dispensing sleeve 16 and is thrown into the area of the blades of the impeller 12.
  • the individual blades 13 of the impeller 14 are - this is only slightly recognizable in the drawing - arranged radially on a side plate 22 of the impeller 14. In any case, in the present exemplary embodiment, they extend in different (non-curved) planes which run parallel to the axial direction or parallel to the longitudinal central axis. But that does not have to be this way.
  • the planes can basically also be curved.
  • the blades 13 of the impeller bound in an area radially inside an interior space 24, in particular a cavity, or they include this. More specifically, the inner space 24 is formed or bounded by radially inwardly arranged free blade ends 25 of the blades 13.
  • the inner space 24 extends axially as far as the feed opening 20a of the feed end 20 also formed by the radially inner blade ends 25.
  • the feed opening 20 is therefore part of the inner space 24 and forms the axial end thereof.
  • the feed end 20 and the feed opening 20a also forms one of the two axial (lateral) terminations or ends of the impeller 14.
  • only one side window 22 is provided for the impeller 14.
  • the side end plate associated with the feed end 20 would then form the axial impeller termination.
  • this side window could / should be arranged for this case then a central opening through which the blasting agent would be supplied to the feed end 20 formed by the impeller blades 13 and the feed opening 20a.
  • the interior 24 of the impeller 14 is formed with respect to the longitudinal center axis or the axis of rotation of the impeller 14 otherwise rotationally symmetrical. The same applies to the impeller 14 itself.
  • the interior 24 in the present case has a kind of barrel shape, wherein the interior 24 is widened in sections in the direction of the side window 22 or in the direction of the feed end 20 opposite axial end of the impeller 14. This is such that, based on a cross-sectional view, the interior cross-sectional area in at least a portion of the interior 14 is greater than the cross-sectional area of the interior 14 at the inlet end 20, that is, the cross-sectional area of the inlet opening 20a.
  • the radial diameter of the inner space 14, for example in the region of the double arrow 26, is greater than that of the feed opening 20a of the inner space 14.
  • an upper contour line 28a and a lower contour line 28b can be seen. These contour lines 28a, 28b are formed by the free ends 25 of the blades 13. In cross-section (not shown), the free blades 13 and the free blade ends 25 are arranged along a circle.
  • the upper contour line 28a and the lower contour line 28b are curved in sections. Furthermore, at least a portion of the contour line 28a and the contour line 28b are each arranged radially further outward than the end point 30a or 30b of the contour line 28a or 28b at the feed end 20 or at the feed opening 20a. For example, in each case that section in which the double arrow 26 is located.
  • the interior 24 is also partially bounded by the blades 13 in an axial direction, for example in the sections 32a, 32b which form part sections of the contour lines 28a, 28b.
  • the blades 13 of the impeller 14 need not be configured as shown in the present embodiment. Rather, it is decisive that the blades 13 define a shape of the inner space 24, which leads to the fact that the inner space 24 is widened at least in a section opposite its design at the feed end 20.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP15001438.9A 2014-05-19 2015-05-13 Impulseur d'alimentation en agent de grenaillage d'une turbine de grenaillage Withdrawn EP2946882A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014007218 2014-05-19

Publications (1)

Publication Number Publication Date
EP2946882A1 true EP2946882A1 (fr) 2015-11-25

Family

ID=53268570

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15001438.9A Withdrawn EP2946882A1 (fr) 2014-05-19 2015-05-13 Impulseur d'alimentation en agent de grenaillage d'une turbine de grenaillage

Country Status (2)

Country Link
EP (1) EP2946882A1 (fr)
DE (1) DE102015006248A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10155299B1 (en) 2017-08-23 2018-12-18 Wheelabrator Group, Inc. Impeller for a blast wheel machine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2363437A (en) * 1943-06-14 1944-11-21 Rolland E Peterson Centrifugal blasting machine
US5769693A (en) * 1995-09-30 1998-06-23 Wadephul; Jost Impeller wheel
DE19838733C1 (de) * 1998-08-26 1999-11-25 Jost Wadephul Schleuderrad
WO2001049456A1 (fr) * 1999-12-29 2001-07-12 Andreas Robert Deck Dispositif de traitement de surfaces
EP1632310A1 (fr) * 2000-10-02 2006-03-08 Pangborn Corporation Roue centrifuge et arrangement d'aubes pour celle-ci

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2363437A (en) * 1943-06-14 1944-11-21 Rolland E Peterson Centrifugal blasting machine
US5769693A (en) * 1995-09-30 1998-06-23 Wadephul; Jost Impeller wheel
DE19838733C1 (de) * 1998-08-26 1999-11-25 Jost Wadephul Schleuderrad
WO2001049456A1 (fr) * 1999-12-29 2001-07-12 Andreas Robert Deck Dispositif de traitement de surfaces
EP1632310A1 (fr) * 2000-10-02 2006-03-08 Pangborn Corporation Roue centrifuge et arrangement d'aubes pour celle-ci

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10155299B1 (en) 2017-08-23 2018-12-18 Wheelabrator Group, Inc. Impeller for a blast wheel machine
WO2019040208A1 (fr) * 2017-08-23 2019-02-28 Wheelabrator Group, Inc. Roue à aubes pour une machine à roue de décapage

Also Published As

Publication number Publication date
DE102015006248A1 (de) 2015-12-03

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