• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The subject of this invention forms a sash (10) for sorters for treating a pulp suspension, wherein the wing (10) on a rotor (1) of the sorter is fastened. According to the invention, the wing (10) has a leading edge (11) curved in the direction of the trailing edge (12) or a curved envelope (21) of the leading edge (11). The invention also includes a sorter with a rotor (1) to which the wings (10) according to the invention are attached.
    公开号:AT518213A1
    申请号:T50063/2016
    申请日:2016-02-03
    公开日:2017-08-15
    发明作者:Ing Alexander Gscheider Dipl；Erwin Hertl Ing
    申请人:Andritz Ag Maschf；
    IPC主号:
    专利说明:

    ROTOR WING AND SORTER WITH ROTOR WING
    The subject of this invention is a wing for sorters, which are usually used for the treatment of a pulp suspension. The wing is attachable to the rotor and has a front and rear edge. The subject of this invention also forms a sorter with the wings according to the invention.
    A sorter for cleaning a pulp suspension according to the prior art is shown in FIG. It has a rotor 1 and a strainer 8. The rotor 1 rotates about the rotor axis 2. The direction of rotation of the rotor 1 is indicated by an arrow. On the rotor 1 a plurality of wings 3 are screwed on mounting holes 7 on the brackets 4. Of course it is also possible to fix the wings by welding. The wing distance to the screen basket 8 is shown here with y.
    The wings 3 have viewed in plan a straight front edge 5 and a straight trailing edge 6. In cross-section, they have a wing profile, but other shapes are possible here and in use.
    In operation, 8 pressure and suction pulses and turbulence triggered by the wings 3 at the perforation (holes or slots) of the screen basket. As a result, clogging of Siebkorböffnungen is prevented. The operation of a sorter is very energy-intensive and thus expensive due to the generation of these pulses and turbulences.
    The invention is therefore based on the object to improve conventional wings or sorters so that they require less energy at least the same cleaning performance.
    This problem is solved by wings, which have a curved front edge when viewed in the wing outline or a curved envelope of the leading edge. The curvature takes place in the direction of the trailing edge.
    Surprisingly, this new design has found that sorters with appropriate blades require less energy for the same or even better cleaning performance.
    The curved front edge also better distributes the pressure impulse caused by the wing onto the screen basket. As a result, the locally acting forces are reduced to the screen basket and increases the service life of the basket. Furthermore, a very flat pulsation pattern on the sorters soap results, allowing the use of this sash for paper machine headbox sorters where lowest pressure variations are required.
    The leading edge may be symmetrical, for example circular arc, curved from the middle of the wing to the wing tips.
    Even better results can be achieved, even if the trailing edge or the envelope of the trailing edge is curved in the same direction as the leading edge.
    In cross section, the wing preferably has an airfoil profile, wherein the curved wing top faces the screen basket.
    In one embodiment, the front edge is step-shaped, so that the envelope in the direction
    Trailing edge is curved. Preferably, then, the trailing edge is formed stepwise.
    Such a wing shape can be produced, for example, when a conventional wing with straight front and rear edges is divided into individual slices, the cut surfaces are normal to the leading edge. The slices are then offset from the middle of the wing to the rear edges towards the trailing edge and then joined together again. This results in a wing with stepped front and rear edges whose envelopes are each curved backwards. If the original wing has an airfoil profile, then one also obtains a partially stepped upper wing side or wing lower side (FIGS. 8 and 9), which in turn improves the flow behavior.
    It is advantageous if webs are provided on the wing surface, which run from the front edge to the trailing edge. These webs do not have to start directly at the leading edge, but can also be made shortened. These webs can be present both on the side facing the screen basket and on the side facing the rotor.
    In one possible embodiment, the leading edge or its envelope and the trailing edge or its envelope curve are equally curved and the airfoil profile substantially the same over the entire blade length.
    The wing may be wider in the front area (area which is first moved by the pulp suspension) than in the rear area, i. the distance between the two end points of the leading edge is then greater than the distance between the two end points of the trailing edge.
    The invention also relates to a sorter for treating a pulp suspension with a rotor having the wings according to the invention.
    The wings can be mounted parallel to the rotor axis or at an angle. Due to the inclination of the wing (see Fig. 6), the load on the screen basket can be further reduced. The pitch of the wings may be different in the various rows of wings to be at an optimum angle to the material spiral flow. This angle preferably ranges from 0 ° to +/- 25 °.
    The inclination of the wings may be such that, in operation, the upper wing tip is leading the lower wing tip or the lower wing tip is leading the upper wing tip.
    Likewise, both inclinations can be performed on a rotor. Thus, the residence time of the stock suspension in the rotor body and screen basket can be adjusted and optimized. The residence time depends on the type of pulp, or on the consistency and the flow behavior of the suspension.
    It is advantageous if the distance y of the individual vanes from the sieve basket varies over the rotor height z.
    Thus, for example, the wings arranged in the upper inlet area of the sorter can travel closer to the screen basket than the wings arranged in the lower area or vice versa (depends on the type of pulp, or on the consistency and flow behavior of the suspension).
    Hereinafter, some embodiments of the invention will be described with reference to drawings. Show it:
    Fig. 1 shows a conventional sorter according to the prior art, as has already been described above.
    Fig. 2 is a plan view of a wing according to the invention;
    3 shows a cross section through the wing of Figure 2 with a possible embodiment with screw fastening.
    FIG. 4 shows a sorter with the wings according to the invention according to FIGS. 2 and 3;
    5 shows a plan view of a further wing according to the invention;
    FIG. 6 shows a sorter with the wings according to FIG. 5; FIG.
    Fig. 7 is a plan view of another wing according to the invention narrower in the rear area;
    8 shows a plan view of a wing according to the invention, in which the front edge and the rear edge are step-shaped;
    9 shows a cross section through the wing according to FIG. 8;
    10 shows a further sorter with wings according to the invention;
    Like reference numerals in the respective figures indicate like components.
    FIG. 2 shows an embodiment of the wing 10 according to the invention. It has a front edge 11 which, viewed in plan view, is curved in the direction of the trailing edge 12. This direction is indicated by an arrow and the reference numeral 23. The leading edge 11 is symmetrically curved with respect to the wing center line 24. On the wing center line 24 are also the two mounting holes 13 for receiving the mounting screws. The leading edge 11 ends at the wing edges in the end points 14 and 15 whose connecting line is denoted by the reference numeral 16. The distance between the two end points 14 and 15 is marked with a.
    The trailing edge 12 is also curved in the direction 23 and indeed as strong as the leading edge 11. The trailing edge 12 ends at the wing edges in the end points 31 and 32, the distance between these two points 31 and 32 is marked b. Both distances a and b are equal here or the wing 10 is uniformly wide.
    Both edges 11, 12 are curved in a circular arc.
    Figure 3 shows a cross section through the wing 10 of Figure 2. It can be seen well here the airfoil profile, the domed top points to the screen basket.
    FIG. 4 shows a sorter with a screen basket 8 and a rotor 1 on which several wings 10 according to FIGS. 2 and 3 are mounted. The wings 10 in the edge regions are not shown here for clarity. The height of the rotor 1 is denoted by z. The wings 10 are here distributed over the rotor height z distributed in three planes, of course, more or fewer levels can be provided. In FIG. 4, the wings 10 are arranged circumferentially relative to the height Z in each case in one plane, so that the wings 10 of different planes cover different screen basket areas. The wings 10 can also be arranged offset over the height z of the rotor 1 so that wings 10 of different levels cover the same screen basket areas.
    All wings 10 are arranged in Fig. 4 parallel to the rotor axis 2, i. the connecting line 16 of the two end points 14 and 15 of the wing leading edge 11 is parallel to the rotor axis. 2
    Figure 5 shows a vane 10 which is very similar to the vane 10 in Figure 2, but not both mounting holes 13 are on the vane centerline 24 here. This vane 10 is mounted obliquely on the rotor 1, as shown in Figure 6. The connecting line 16 of the two end points 14 and 15 of the wing leading edge 11 is therefore not parallel to the rotor axis 2, but forms with this in cross-section viewed an angle α of +/- 20 °, preferably of +/- 10 °.
    The wing 10 according to FIG. 5 has two webs 19 on the wing inside (the side facing away from the screen basket 8) and two webs 20 on the wing outside (screen basket 8). These webs 19, 20 have a favorable effect on the flow behavior, of course more or fewer webs 19 or 20 can be provided. The two
    Wing edges 17 and 18 are parallel here, i. the wing is uniformly wide.
    FIG. 7 shows a wing 10 which, in contrast to the wing 10 in FIG. 5, is narrower in the rear area than in the area of the front edge 11. The two wing edges 17, 18 thus do not run parallel or the distance a between the two End points 14 and 15 of the leading edge 11 greater than the distance b between the two end points 31 and 32 of the trailing edge 12th
    FIG. 8 shows another wing 10 according to the invention in plan view. The front edge is here stepped, as well as the trailing edge in such a way that the envelope 21 is curved in the direction of the trailing edge. The trailing edge envelope 22 is curved in the same direction but, in the present example, is stronger than the trailing edge envelope 21.
    In Figure 9, the wing 10 of Figure 8 is shown in cross-section, it can be seen well the airfoil. The individual wing segments 101, 102 and 103 all have an airfoil profile and are narrower at the rear than at the front. The wing segments 101, 102 and 103 are offset from each other, so that thereby results in the stepped front and rear edge. In addition, webs are thereby formed on the wing top and wing underside.
    This wing 10 is narrower than the front by the slightly wedge-shaped segments 101, 102 and 103 behind. The distance a of the two end points 14 and 15 of the leading edge is therefore greater than the decency b of the two end points 31 and 32 of the wing trailing edge. Of course, it is also conceivable that both distances a and b are equal, so that the wing side edges 17 and 18 are parallel.
    The wing 10 according to FIG. 8 is not only suitable for a straight assembly on the rotor 1, but can also be mounted obliquely through the elongated attachment hole 13, i. the connecting straight line 16 of the two end points 14 and 15 does not run parallel to the rotor axis 2. With this variant, a customized adjustment of the angle for the particular application is possible. It is also conceivable that the wing leading edge 11 is not formed step-like but wavy or can also be performed wavy wing surface.
    FIG. 10 shows another sorter with the wings 10 according to the invention. The wings 10 are formed asymmetrically and attached to the rotor 1 at its upper edge region.
    权利要求:
    Claims (17)
    [1]
    claims
    A sorter wing (10) for treating a pulp suspension, the wing (10) being securable to a rotor (1) of the sorter, and the wing (10) having a leading edge (11) and a trailing edge (12), characterized in that viewed in the wing plan view, the leading edge (11) or an envelope (21) of the front edge (11) in the direction (23) trailing edge (12) is curved.
    [2]
    2. wing (10) according to claim l, characterized in that viewed in the wing plan view, the rear edge (12) is curved.
    [3]
    3. wing (10) according to claim 1 or 2, characterized in that the wing (10) in cross section has a wing profile, wherein the front edge (11) forms the profile nose.
    [4]
    4. wing (10) according to one of claims 1 to 3, characterized in that the front edge (11) from the wing center (24) to the wing tips (17, 18) is symmetrically curved out.
    [5]
    5. wing (10) according to claim 4, characterized in that the front edge (11) or the envelope (21) of the front edge (11) is arcuately curved.
    [6]
    6. wing (10) according to one of claims 1 to 5, characterized in that the front edge (11) is step-shaped and that the envelope (21) in the direction (23) trailing edge (12) is curved.
    [7]
    7. wing (10) according to claim 6, characterized in that the rear edge (12) is formed stepwise and that the envelope (22) of the trailing edge (12) is curved.
    [8]
    8. wing (10) according to one of claims 1 to 7, characterized in that on the wing surface webs (19, 20) are provided.
    [9]
    9. wing (10) according to one of claims 1 to 8, characterized in that the leading edge (11) or its envelope (21) and the trailing edge (12) or its envelope (22) are curved equally strong and that in Cross-section considered the airfoil profile over the entire wing length (a) is substantially equal.
    [10]
    10. wing (10) according to one of claims 1 to 8, characterized in that the front edge (11) or its envelope (21) and the trailing edge (12) or its envelope (22) are curved to different degrees.
    [11]
    11. wing (10) according to one of claims 1 to 8, characterized in that the distance (a) between the two end points (14, 15) of the front edge (11) is greater than the distance (b) between the two end points ( 31, 32) of the trailing edge (12).
    [12]
    12. wing (10) according to one of claims 1 to 11, characterized in that the wing has at least two mounting holes (13) for the attachment of the wing (10) on a rotor (1), wherein at least one mounting hole (13) elongated is formed so that the mounting position on the rotor (1) is adjustable.
    [13]
    13. A sorter for treating a pulp suspension with a rotor (1) and a screen basket (8), wherein on the rotor (1) a plurality of wings (10) are fastened, characterized in that the wings (10) according to one of claims 1 to 12 are formed.
    [14]
    14. A sorter according to claim 13, characterized in that the wings (10) on the rotor (1) are fixed such that a connecting line (16) between the two end points (14, 15) of the front edge (11) parallel to the rotor axis (2 ) runs.
    [15]
    15. A sorter according to claim 13, characterized in that the wings (10) on the rotor (1) are mounted obliquely, so that a connecting line (16) between the two end points (14, 15) of the front edge (11) not parallel to the rotor axis ( 2) runs.
    [16]
    16. A sorter according to any one of claims 13 to 15, characterized in that a plurality of wings (10) over the rotor height (z) are fixed, and that the vane spacing (y) from the strainer basket (8) over the rotor height (z) varies.
    [17]
    17. Sorter according to one of claims 15 or 16, characterized in that a plurality of wings (10) over the rotor height (z) are fixed, and that the wings (10) are mounted at different obliquely.
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3939065A|1972-08-31|1976-02-17|Ahlfors S E E|Screening device|
    WO1994001618A1|1992-07-13|1994-01-20|Ingersoll-Rand Company|Screening apparatus for papermaking pulp|
    DE69424661T2|1993-04-15|2001-01-25|Beloit Technologies Inc|SCREENING DEVICE FOR PAPER-FREE|
    DE60121377T2|2000-02-04|2007-07-05|Mitsubishi Heavy Industries, Ltd.|Device for sifting pulp|
    EP1143065A2|2000-04-03|2001-10-10|Andritz AG|Screen and foil for papermaking|
    EP2203590A1|2007-09-28|2010-07-07|Andritz Oy|Apparatus for screening fibrous suspensions|
    DE102009014810A1|2009-03-25|2010-09-30|Andritz Fiedler Gmbh|Flank for sorting devices, particularly for fiber suspensions in paper pulp, has outer contour facing sieve wall, where outer surface of flank has limiting edge till flank end|
    WO2012084562A1|2010-12-22|2012-06-28|Voith Patent Gmbh|Pressure screen|
    CN104532652A|2014-12-10|2015-04-22|新乡航空工业新平机械有限公司|Pressure screen rotor, cylinder body and rotor wing positioning method of pressure screen rotor and pressure screen|
    ITVI20040208A1|2004-09-02|2004-12-02|Comer Spa|PERFECTED ROTOR FOR FIBROUS SUSPENSION CLEANERS|
    JP2007254901A|2006-03-20|2007-10-04|Aikawa Iron Works Co Ltd|Screening apparatus|
    EP2366892B1|2010-03-18|2014-07-30|Nordex Energy GmbH|Wind turbine rotor blade|CN111364274A|2020-04-30|2020-07-03|郑州磊展科技造纸机械有限公司|Novel pressure screen|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50063/2016A|AT518213B1|2016-02-03|2016-02-03|ROTOR WING AND SORTER WITH ROTOR WING|ATA50063/2016A| AT518213B1|2016-02-03|2016-02-03|ROTOR WING AND SORTER WITH ROTOR WING|
    CN201680078325.9A| CN108474176B|2016-02-03|2016-11-15|Rotor blade and screening machine with rotor blade|
    EP16797527.5A| EP3411522B1|2016-02-03|2016-11-15|Rotor blade, and screen comprising a rotor blade|
    PCT/EP2016/077749| WO2017133803A1|2016-02-03|2016-11-15|Rotor blade, and screen comprising a rotor blade|
    US16/073,350| US10724175B2|2016-02-03|2016-11-15|Rotor blade and screen comprising a rotor blade|
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