EP1002957A2 - Ventilateur radial - Google Patents

Ventilateur radial Download PDF

Info

Publication number
EP1002957A2
EP1002957A2 EP99122993A EP99122993A EP1002957A2 EP 1002957 A2 EP1002957 A2 EP 1002957A2 EP 99122993 A EP99122993 A EP 99122993A EP 99122993 A EP99122993 A EP 99122993A EP 1002957 A2 EP1002957 A2 EP 1002957A2
Authority
EP
European Patent Office
Prior art keywords
impeller
blade ring
radial fan
fan according
partition
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
EP99122993A
Other languages
German (de)
English (en)
Other versions
EP1002957B1 (fr
EP1002957A3 (fr
Inventor
Ernst Dipl.-Ing. Claussen
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.)
Punker GmbH
Original Assignee
Punker GmbH
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 Punker GmbH filed Critical Punker GmbH
Publication of EP1002957A2 publication Critical patent/EP1002957A2/fr
Publication of EP1002957A3 publication Critical patent/EP1002957A3/fr
Application granted granted Critical
Publication of EP1002957B1 publication Critical patent/EP1002957B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
    • F04D25/166—Combinations of two or more pumps ; Producing two or more separate gas flows using fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/02—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal
    • F04D17/04—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal of transverse-flow type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/102—Shaft sealings especially adapted for elastic fluid pumps

Definitions

  • the invention relates to a radial fan with a pot-like Impeller with a blade ring on its circumference is provided with a receiving the impeller Housing that starts from a part-circle-curved, running directly along the blade ring Circumferential wall area like a screw in the direction of rotation of the Impeller expanded radially to one outlet and two the side walls covering axial end faces of the impeller has, one on one of the side walls arranged partition engages in the pot-like impeller and its interior into a first and a second Suction chamber divided, the first suction chamber, a suction opening is assigned and the second suction chamber circumferential wall area running directly along the blade ring is facing.
  • labyrinth-like elevations and / or depressions are advantageously transverse to the direction of travel transverse ribs of the impeller and / or Cross grooves provided that are perpendicular or oblique to the direction of travel can run, with curved designs can be beneficial. Especially at sloping or curved designs will still be a reduction the running noise of the fan is reached.
  • the one running directly along the blade ring The circumferential area preferably extends over a Angle from 60 ° to 150 ° to achieve the desired increase in performance to reach safely.
  • the housing can be adapted or optimized.
  • the peripheral wall of the housing is removed the rear end of the wheel as seen in the direction of rotation of the impeller directly along the circumferential wall region running along the blade ring forming this spiral expansion angle increasingly radial from the impeller, being a continuous or abrupt transition is provided and the transition curvature can be optimized.
  • the blades of the blade ring also preferably take an angle to the radial direction that is most favorable Can be 26 - 29 °.
  • a radial fan is a pot-like impeller 10 rotatably mounted in a screw-like housing 11.
  • the impeller 10 consists of a circular disc Bottom 12, the center of a hub 13 for connection to the Drive axis of a not shown for simplicity Drive motor owns.
  • On the radially outer peripheral area of the floor 12 rises perpendicular to the plane of the floor 12 a plurality of blades 14 which form a blade ring 15 form.
  • the blades 14 are at one end on the bottom 12 and at the other end with a retaining ring 16 by means of bent Retaining tabs 17 connected.
  • the blades 14 are curved in and opposite to the radial direction an angle ⁇ inclined, which is preferably 26-29 °.
  • the housing 11 consists of a helically shaped Circumferential wall 18, with a curved part-circle Circumferential wall area 19 directly with a very small Gap of less than 1 mm along the blade ring 15 extends, in the exemplary embodiment over an angle of approx. 110 °. However, this angle can vary and between 60 ° and 150 °.
  • This peripheral edge area 19 is with a plurality of parallel groove-like depressions 20 provided, which are parallel to the axis of rotation of the impeller 10th extend and opposite the blade ring 15 of the impeller 10 effect a seal in the manner of a labyrinth seal.
  • the rotation of the impeller 10 produces small ones Vortex in the groove-like recesses 20, which is the target Sealing to increase fan performance and of the working pressure.
  • groove-like depressions 20 shown can also reduce running noise run at an angle to the axis of rotation of the impeller or one have a curved course.
  • peripheral edge region 19 widens the peripheral wall 18 increasing the radial distance from the axis of rotation the impeller 10 up to a blower outlet 21.
  • the peripheral wall 18 thus forms a in this area Spiral expansion angle ⁇ towards the impeller 10, the Circumferential wall 18 in the transition area a slight kink experiences.
  • One against the direction of curvature of the groove-like Recesses 20 provided peripheral edge region 19th curved end portion 22 of the peripheral wall 18 connects the peripheral edge region 19 with the blower outlet 21.
  • the peripheral wall 18 forms, together with two, the open ones Sides of the peripheral wall 18 cover side walls 23, 24, the housing 11.
  • These side walls cover 23, 24 also the axial end faces of the impeller 10.
  • To seal the impeller 10 to the two side walls 23, 24 serve labyrinth seals 25, such as they, for example, in the state of the Technology are described.
  • the bottom 12 of the impeller 10 is adapted to the shape of the adjacent side wall 23, the multiple-angled one shown in FIG. 3 Cross-sectional shape of the bottom 12 an additional Sealing causes.
  • a partition extends from the side wall 24 26 and divided into the interior of the pot-like impeller 10 whose interior into a first suction chamber V1 and one second suction chamber V2, which faces the peripheral wall region 19 is.
  • This partition 26 extends from the Side wall 24 from obliquely to the bottom 12 of the impeller 10 down, in principle also a parallel course to Axis of rotation of the impeller 10 is possible, as in one Embodiment of the state of the Technology is shown.
  • To seal the gap between the bottom 12 of the impeller 10 and this bottom 12 facing edge of the partition 26 is this edge a felt strip 27 or a felt strip.
  • the Felt strips 27 can be dimensioned so that it in new condition grazes on floor 12 and when rotating the Impeller 10 is ground so that a minimal gap arises.
  • a felt strip 27 or a felt strip another fiber or foam-like for sealing Bar provided on this edge of the partition 26 be, e.g. also a fleece-like or bristle-like Strip.
  • the bottom 12 of the impeller 10 can also as be flat plate so that the floor 12th facing edge of the partition 26 beveled accordingly is that the gap width is essentially everywhere is equal to.
  • the side wall 24 has an air intake opening 28 provided, which opens into the first suction chamber V1.
  • Impeller 10 in the area of the first suction chamber V1 as a radial fan. Outside air is drawn in through the air intake opening 28 in sucked the first suction chamber V1 and over the circumferential area of the first suction chamber V1 radially through the blade ring 15 accelerated to the outside. This accelerated air flow divides outside into a working current A1 and one Working current A2 on.
  • the working current A1 comes in again the first suction chamber V1 and is due to the radial fan action accelerated outward again, whereby a substantial part of this work flow on the opposite End of the first suction chamber V1 in the by the Spiral expansion angle ⁇ formed spiral expansion range reached.
  • the impeller is on in the area of the second suction chamber V2 its two axial end faces through the side walls 23, 24 tightly sealed. Towards the interior the partition 26 forms a tight seal, and on the peripheral edge region 19 opposite the partition seal the groove-like recesses 20 the impeller 10.
  • This therefore works in the area of the second suction chamber V2 exclusively as a cross flow fan, which is the working flow in the area of the blower outlet 21, compressed and in the by the spiral expansion angle ⁇ blows out limited spiral expansion area or diffuser.
  • the radial fan thus works in part as a two-stage Blower with a formed by the first suction chamber V1 as a radial fan stage and one by the second suction chamber V2 formed as a cross-flow fan working level. To achieve a high working pressure and a high fan performance is therefore the good seal of the second suction chamber V2 is essential.
  • Three flow islands 29 - 31 in the interior of the housing 11 are as connecting elements between the two side walls 23, 24 trained and are used for elimination of turbulent flow components (vortex zones) and Establishing a flow profile that is as homogeneous as possible. Turbulent Currents would produce the desired flow hinder and cause increased noise.
  • FIG. 4 is an alternative construction for sealing shown between the partition 26 and the impeller 10.
  • the edge of the partition wall 26 facing the bottom 12 is with a perforated disc 40 which corresponds to the shape of the floor 12 of the impeller 10 is adapted and towards this bottom 12 the smallest possible, constructively acceptable gap forms.
  • the hub 13 protrudes through the central hole of the Perforated disk 40 through. If the hub 13 is off the ground 12 extends outwards, so instead of one Perforated disc 40 a continuous disc can be used.
  • Fig. 5 is a third way for sealing between partition 26 and bottom 12 of the impeller 10.
  • the edge of the partition wall 26 facing the floor 12 is with a sealing strip oriented parallel to the floor 12 32 provided that pointing to the floor 12 Side provided with two groove-like depressions 33 is.
  • the groove-like Wells 33 also directly on the edge of the Partition 26 may be provided.
  • the number of groove-like Wells 33 of course not on the Number two limited. In the simplest case, only a single groove-like recess 33 may be provided.
  • an S-shaped curved edge 34 is provided, also having an arcuate or other curvature is possible.
  • the edges 36 of the partition 26 form the outer ends less and towards the middle one increasing gap to the blade ring 15. This is 9 reversed, that is, there form the edges 37 of the partition 26 in the central area a smaller one and a growing towards the two end areas Gap towards the blade ring 15.
  • the peripheral wall 38 of the housing 11 ' forms there from the end of circumferential edge area provided with groove-like depressions 20 39 a larger spiral widening angle ⁇ , where there is a jump edge-like transition, that is, the distance between the peripheral wall 38 and the impeller 10 initially expanded almost by leaps and bounds, then expanded continue to expand to the blower outlet 21.
  • ⁇ the spiral widening angle

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
EP99122993A 1998-11-20 1999-11-19 Ventilateur radial Expired - Lifetime EP1002957B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29820767U DE29820767U1 (de) 1998-11-20 1998-11-20 Radialgebläse
DE29820767U 1998-11-20

Publications (3)

Publication Number Publication Date
EP1002957A2 true EP1002957A2 (fr) 2000-05-24
EP1002957A3 EP1002957A3 (fr) 2002-01-16
EP1002957B1 EP1002957B1 (fr) 2003-08-13

Family

ID=8065601

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99122993A Expired - Lifetime EP1002957B1 (fr) 1998-11-20 1999-11-19 Ventilateur radial

Country Status (4)

Country Link
EP (1) EP1002957B1 (fr)
AT (1) ATE247231T1 (fr)
DE (2) DE29820767U1 (fr)
ES (1) ES2200457T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1188930A1 (fr) 2000-09-14 2002-03-20 PUNKER GmbH & CO. Dispositif de soufflante, particulièrement dispositif d'un ventilateur radial
EP1528258A1 (fr) * 2003-10-31 2005-05-04 Punker GmbH & Co. Ventilaterur radial pour un brûleur à gaz

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1022469B1 (fr) 1999-01-20 2004-10-06 Punker GmbH & Co. Soufflante radial
DE59910827D1 (de) 1999-01-20 2004-11-18 Punker Gmbh & Co Radialgebläse

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4997340A (en) * 1989-09-25 1991-03-05 Carrier Corporation Balance piston and seal arrangement
DE9216709U1 (de) * 1992-09-25 1993-02-11 Schilling, Siegfried W., Russikon Radialgebläse
DE19501816B4 (de) * 1995-01-21 2004-11-18 Körting Hannover AG Radialgebläse, insbesondere für Gebläsebrenner

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1188930A1 (fr) 2000-09-14 2002-03-20 PUNKER GmbH & CO. Dispositif de soufflante, particulièrement dispositif d'un ventilateur radial
EP1528258A1 (fr) * 2003-10-31 2005-05-04 Punker GmbH & Co. Ventilaterur radial pour un brûleur à gaz

Also Published As

Publication number Publication date
DE29820767U1 (de) 1999-01-14
DE59906574D1 (de) 2003-09-18
EP1002957B1 (fr) 2003-08-13
ES2200457T3 (es) 2004-03-01
ATE247231T1 (de) 2003-08-15
EP1002957A3 (fr) 2002-01-16

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