EP3411522A1 - Rotorflügel und sortierer mit rotorflügel - Google Patents
Rotorflügel und sortierer mit rotorflügelInfo
- Publication number
- EP3411522A1 EP3411522A1 EP16797527.5A EP16797527A EP3411522A1 EP 3411522 A1 EP3411522 A1 EP 3411522A1 EP 16797527 A EP16797527 A EP 16797527A EP 3411522 A1 EP3411522 A1 EP 3411522A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wing
- rotor
- edge
- curved
- envelope
- 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
Links
- 239000000725 suspension Substances 0.000 claims abstract description 10
- 238000004140 cleaning Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
- D21D5/02—Straining or screening the pulp
- D21D5/023—Stationary screen-drums
- D21D5/026—Stationary screen-drums with rotating cleaning foils
Definitions
- the subject of this invention forms a wing for
- Pulp suspension are used.
- the wing is attachable to the rotor and has a front and rear edge.
- the subject of this invention also forms
- FIG. 1 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 are several
- Wing 3 screwed on mounting holes 7 to the brackets 4.
- Strainer 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.
- Rotor blades with a curved leading edge known.
- 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.
- wings which, viewed in the wing ground plan, on the one hand have a curved front edge or a curved envelope of the front edge.
- the curvature takes place in the direction of the trailing edge.
- the trailing edge or the envelope of the trailing edge is curved in the same direction as the leading edge.
- 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 results on the sorter side, allowing the use of this sash for paper machine headbox sorters where the lowest pressure variations are required.
- the leading edge can be from the middle of the wing to the
- Wings ends symmetrical, for example
- the wing preferably has one
- the leading edge is
- Trailing edge is curved.
- the trailing edge is formed stepwise.
- Such a wing shape can be produced, for example, when a conventional wing with straight front and rear edge is broken 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.
- the wing may be wider in the front area (area that is first moved through the pulp suspension) than in the back area, ie the distance between the wings both end points of the front 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 containing the
- the wings can be mounted parallel to the rotor axis or at an angle. Due to the inclination of the wing
- 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 the lower wing tip
- both inclinations can be performed on a rotor.
- the residence time depends on the type of pulp, or on the consistency and the flow behavior of the suspension.
- the wings arranged in the upper inlet area of the sorter can be closer to the strainer basket
- 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.
- FIG. 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;
- FIG. 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. 7 is a plan view of another wing according to the invention narrower in the rear area;
- FIG. 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;
- FIG. 2 shows an embodiment of the invention
- Leading edge 11 which is curved in the direction of the rear edge 12 viewed in plan. This direction is indicated by an arrow and the reference numeral 23.
- Leading edge 11 is symmetrically curved with respect to the wing centerline 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 although as strong as the leading edge 11. Die
- 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 with 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.
- 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.
- 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
- End points 14 and 15 of the wing leading edge 11 is parallel to the rotor axis. 2
- Figure 5 shows a wing 10 which is very similar to the wing 10 in Figure 2, but not both
- 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 web
- the two wing edges 17, 18 thus do not run parallel here or the distance a between the two end points 14 and 15 of the front edge 11 is 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 leading edge is here
- 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.
- 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 the stepped front and
- Trailing edge yields. In addition, thereby become at the
- Wing top and wing base made of webs.
- 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.
- 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 stepwise but wavy or can also
- the wings 10 are formed asymmetrically and attached to the rotor 1 at its upper edge region.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Wind Motors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA50063/2016A AT518213B1 (de) | 2016-02-03 | 2016-02-03 | Rotorflügel und sortierer mit rotorflügel |
PCT/EP2016/077749 WO2017133803A1 (de) | 2016-02-03 | 2016-11-15 | Rotorflügel und sortierer mit rotorflügel |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3411522A1 true EP3411522A1 (de) | 2018-12-12 |
EP3411522B1 EP3411522B1 (de) | 2019-09-11 |
Family
ID=57326390
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16797527.5A Active EP3411522B1 (de) | 2016-02-03 | 2016-11-15 | Rotorflügel und sortierer mit rotorflügel |
Country Status (5)
Country | Link |
---|---|
US (1) | US10724175B2 (de) |
EP (1) | EP3411522B1 (de) |
CN (1) | CN108474176B (de) |
AT (1) | AT518213B1 (de) |
WO (1) | WO2017133803A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111424458B (zh) * | 2020-04-30 | 2022-03-22 | 郑州磊展科技造纸机械有限公司 | 一种使用飞翼型旋翼片的压力筛转子及压力筛 |
CN111364274B (zh) * | 2020-04-30 | 2022-04-01 | 郑州磊展科技造纸机械有限公司 | 一种新型压力筛 |
CA3237289A1 (en) * | 2022-04-21 | 2023-09-21 | Iii John Joseph Egan | Rotor with forward-swept struts for pressure screen cylinders |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE374148B (de) * | 1972-08-31 | 1975-02-24 | S E E Ahlfors | |
US5307939A (en) * | 1992-07-13 | 1994-05-03 | Ingersoll-Rand Company | Screening apparatus for papermaking pulp |
US5497886A (en) * | 1992-07-13 | 1996-03-12 | Ingersoll-Rand Company | Screening apparatus for papermaking pulp |
JP3396456B2 (ja) * | 2000-02-04 | 2003-04-14 | 三菱重工業株式会社 | 紙料精選装置 |
AT408997B (de) * | 2000-04-03 | 2002-04-25 | Andritz Ag Maschf | Sortierer für die papier-erzeugung und flügel für sortierer |
ITVI20040208A1 (it) * | 2004-09-02 | 2004-12-02 | Comer Spa | Rotore perfezionato per epuratori di sospensioni fibrose |
JP2007254901A (ja) * | 2006-03-20 | 2007-10-04 | Aikawa Iron Works Co Ltd | スクリーン装置 |
FI120913B (fi) * | 2007-09-28 | 2010-04-30 | Andritz Oy | Laite massan lajittelemiseksi |
DE102009014810A1 (de) * | 2009-03-25 | 2010-09-30 | Andritz Fiedler Gmbh | Flügel für Sortiervorrichtungen |
EP2366892B1 (de) * | 2010-03-18 | 2014-07-30 | Nordex Energy GmbH | Windenergieanlagenrotorblatt |
DE102010063891A1 (de) * | 2010-12-22 | 2012-06-28 | Voith Patent Gmbh | Drucksortierer |
CN104532652A (zh) * | 2014-12-10 | 2015-04-22 | 新乡航空工业(集团)新平机械有限公司 | 压力筛转子、其圆筒体与旋翼的定位方法及压力筛 |
-
2016
- 2016-02-03 AT ATA50063/2016A patent/AT518213B1/de active
- 2016-11-15 EP EP16797527.5A patent/EP3411522B1/de active Active
- 2016-11-15 WO PCT/EP2016/077749 patent/WO2017133803A1/de active Search and Examination
- 2016-11-15 US US16/073,350 patent/US10724175B2/en active Active
- 2016-11-15 CN CN201680078325.9A patent/CN108474176B/zh active Active
Also Published As
Publication number | Publication date |
---|---|
CN108474176B (zh) | 2020-08-04 |
AT518213B1 (de) | 2018-06-15 |
EP3411522B1 (de) | 2019-09-11 |
CN108474176A (zh) | 2018-08-31 |
US20190040578A1 (en) | 2019-02-07 |
WO2017133803A1 (de) | 2017-08-10 |
US10724175B2 (en) | 2020-07-28 |
AT518213A1 (de) | 2017-08-15 |
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