EP2930372B1 - Rotor à tambour avec poches d'équlibrage - Google Patents

Rotor à tambour avec poches d'équlibrage Download PDF

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Publication number
EP2930372B1
EP2930372B1 EP15161266.0A EP15161266A EP2930372B1 EP 2930372 B1 EP2930372 B1 EP 2930372B1 EP 15161266 A EP15161266 A EP 15161266A EP 2930372 B1 EP2930372 B1 EP 2930372B1
Authority
EP
European Patent Office
Prior art keywords
balancing
bulge
drum rotor
rotor wheel
blades
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.)
Active
Application number
EP15161266.0A
Other languages
German (de)
English (en)
Other versions
EP2930372A1 (fr
Inventor
Markus Hoff
Katrin Bohl
Reinhard Strohmeier
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.)
Ebm Papst Mulfingen GmbH and Co KG
Original Assignee
Ebm Papst Mulfingen GmbH and Co KG
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 Ebm Papst Mulfingen GmbH and Co KG filed Critical Ebm Papst Mulfingen GmbH and Co KG
Priority to SI201530134T priority Critical patent/SI2930372T1/en
Publication of EP2930372A1 publication Critical patent/EP2930372A1/fr
Application granted granted Critical
Publication of EP2930372B1 publication Critical patent/EP2930372B1/fr
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Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/02—Blade-carrying members, e.g. rotors
    • F01D5/027—Arrangements for balancing
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/30—Vanes
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/662—Balancing of rotors
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
    • F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05D2240/306—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the suction side of a rotor blade

Definitions

  • the invention relates to a drum rotor wheel for a fan.
  • Tumbler fans are radial flow machines with a rotor wheel having numerous short, forwardly curved blades. Due to the forward curved blading drum runners reach in terms of producible flow velocity and pressure increase in the flow medium desired operating points at significantly lower speeds than radial fan with backward curved blading, which is desired, for example, when used in air conditioning. The forward curvature causes a high energy transfer from the fan to the delivery fluid. Drum runners are used with a housing that converts the high kinetic energy into pressure energy. The flow enters axially into the fan, is accelerated and leaves the housing radially.
  • the forward curvature of the blades is characterized by a strong flow deflection, wherein the flow can not follow the blade curvature in most cases and peels or flows back.
  • the detachment bladder on the suction side of the blade thereby represents a loss area.
  • the efficiency of such drum rotor fans is therefore relatively low. Nevertheless, the high power density and therefore the low installation space required has led to a widespread use in the field of heating, air conditioning and ventilation technology. This shows the WO 2007/003416 A1 a drum rotor wheel with suction-profiled blades to reduce flow separation.
  • a generic radial fan with a drive motor and a driven by this via a connecting member radial fan, which has a plurality of elongated fan blades, is from the German utility model DE 20 2009 006872 U1 known.
  • the fan blades each have a radial inner side, a radial outer side, a drive-side longitudinal end which is in drive connection with the connecting member, a drive-remote longitudinal end facing away from the drive-side longitudinal end, intermediate spaces between adjacent ones Fan blades through which in the operation of the air delivered by the fan is conveyed from the radially inner side of the radial fan to the outside, on.
  • the fan blades are provided in the region of their drive-side longitudinal end on at least one adjacent fan blade facing side with an associated thickening, which extend which thickening in the spaces between adjacent fan blades, without fully filling these gaps.
  • Rotor impellers for blowers and fans usually need to be balanced for practical use to ensure smooth, low-vibration running.
  • balancing weights are arranged above all on the outer periphery.
  • the impeller has a hub for connecting the impeller to a drive motor, fan blades disposed about the hub, the fan blades defining a flow path for airflow generated by the impeller, and pockets for inserting balancing weights, the pockets at least partially are arranged in the fan blades.
  • German publication DE 10 2009 032 411 A1 discloses a centrifugal multi-bladed fan for drawing air from an air intake portion provided from one end side or two end sides of an axial direction of a rotation shaft, and for blowing the drawn air into a radial outer side, the centrifugal multiple-blade fan having a plurality of Leaves which are arranged around the axis of rotation around.
  • the centrifugal multiple-blade blower has a front side portion provided in the blade to face toward an open surface of the air suction portion, an edge line on a meridian plane of the front side portion extending in a direction crossing with the axial direction one Balance weight, which is attached to the front side portion in the blades to adjust a fan balance on.
  • a counterweight for example, it is possible to attach at least one counterweight to a radial impeller arrangement with a backward-curved radial impeller with a circular bottom disk and a circular cover disk with press-in blade on at least one of the two disks in the disk edge region.
  • the impeller can build larger by the balance weight.
  • a two-piece balancing weight can be used, which has a spring clip and an additional weight, wherein the spring clip has a holding portion for attachment to the impeller and a receiving portion for holding the additional weight.
  • Such balancing weights must be laboriously assembled. In particular, it is customary to mount balancing weights manually.
  • the present invention is therefore based on the object to provide a Drummellellerrad that is easily balanced and automatically ausuchtbar is also manually balanced, the efficiency of the Trommelelerierrads should not be degraded.
  • a drum rotor wheel having the features of independent claim 1.
  • Advantageous developments of the Drummel scholarrrads emerge from the dependent claims 2-8.
  • An inventive Drummel definitionrrad has numerous short, forward curved blades. The blades have a suction side and a pressure side.
  • a cover plate and a bottom plate are provided at the Trommelrellerrad.
  • At least one blade of the drum rotor wheel has a bulge on its suction side. The bulge minimizes the area of flow separation, thereby also minimizing the amount of flow separation. In other words, the efficiency of the Trommeleltechnikrrads is increased by the bulge.
  • the bulge is connected to the bottom plate.
  • the bulge is completely provided in the area of the otherwise occurring during operation flow separation. If the bulge lies only in the region of the flow separation, but substantially completely fills it, the vortex formation is almost completely prevented and the efficiency of the drum rotor wheel is optimized. On the other hand, the maximum cross section for the flow between the blades is available, whereby the flow resistance is minimized and the efficiency of the Trommelelenvironrrads is further optimized.
  • the bulge on a blade of the Trommelel mecanicrrads on at least one balancing pocket, which extends into the bottom plate and is guided through them.
  • the balancing bag is designed in a hollow shape for receiving a balancing weight.
  • the balancing pocket extends into the bottom plate and is guided through it, it has an opening in the bottom plate through which a balancing weight can be spent in the balancing bag.
  • the balancing bag can be designed so that a rectangular plug-in weight for balancing can be pressed into the balancing pocket in a form-fitting manner.
  • Such a configuration is particularly well suited for the automated balancing of drum rotor wheels.
  • the hollow design of the bulge material accumulation is minimized.
  • Tumbler wheels are usually made of plastics, especially thermoplastics and mainly by injection molding.
  • the bulge in the axial direction x is made shorter than the axial extent of the blade.
  • the balancing pocket extends into the cover disk.
  • the bulge extends over the entire height of the blade.
  • a correspondingly increased balance weight can be spent, whereby the balancing effect can be increased.
  • the balancing pocket is guided through the cover disk.
  • an opening of the balancing pocket is achieved in the cover plate, whereby a balancing weight can be brought into the balancing pocket.
  • this embodiment provides an additional feeding possibility for a balancing weight, which is advantageous in the case of an automated balancing of the feed through the bottom disk, since the flexibility of the supply of a balancing weight is increased. If, for example, due to geometric conditions on the balancing machine, no balancing weight can be supplied through the bottom disk, in this embodiment the balancing weight can alternatively be introduced through the cover disk.
  • all blades have a bulge. This minimizes flow separation on all blades, further increasing the efficiency of the entire drum rotor wheel.
  • the balancing quality can be increased since the location of a balancing weight required for optimal balancing can be more accurately determined. It is an aspect of the invention that the bulge is provided entirely in the area of flow separation otherwise occurring during operation. The efficiency of the Trommeleltechnikrrads is thereby further increased, while a maximized flow area is provided at the same time.
  • the cover plate has an additional ring on its outer side, wherein the inner contour of the additional ring has a radius-shaped area.
  • the radius-shaped area on the inner contour of the ring allows a guided deflection of the flow and further minimizes the flow losses, whereby the efficiency of the Trommeleltechnikrrads is further increased.
  • the additional ring has at least one second balancing pocket.
  • a second level is still obtained for the balance, whereby the balancing quality is improved.
  • Fig. 1 shows a flow pattern on a Trommelellibraryrrad 10 according to the prior art.
  • the blades 20 are curved forward with great curvature.
  • the flow can not follow the high curvature and dissolves on the suction side 21 of the blades 20, creating an area 25 of flow separation, which causes vortex formation in this area 25, causing losses due to dissipation.
  • Fig. 2 shows a drum pulley 10 according to the invention in a three-dimensional view from the perspective of the cover plate 30.
  • the drum rotor 10 has numerous short, forward curved blades 20.
  • the blades 20 have a suction side 21 and a pressure side 22.
  • the blades 20 of the Drummelêtrrads 10 have on their suction side 21 bulges 23.
  • the area 25 in Fig. 1 minimizes flow separation on each blade 20, thereby also minimizing the amount of total flow separation.
  • the bulges 23 are connected to the bottom plate 40 and made shorter in the axial direction x than the axial extent of the blade 20 itself.
  • the cover plate 30 has an additional ring 31.
  • This additional ring 31 has second balancing pockets 33.
  • Fig. 3 shows a drum rotor 10 according to the invention in a three-dimensional representation from the perspective of the bottom plate 40.
  • the drum rotor 10 is made for example of a thermoplastic material by injection molding.
  • the bulge 23 (in Fig. 3 not visible) on the blades 20 of the Drummel culminrrads 10 have balancing pockets 24 which extend into the bottom plate 40 into and are guided therethrough.
  • the balancing pockets 24 are hollow shaped, so that they can take balancing weights. Characterized in that the balancing pockets 24 extend into the bottom plate 40 and are guided through them, they have openings 41 in the bottom plate 40, can be spent by the balancing weights in the balancing pockets 24.
  • Fig. 4 shows the Drummell 10 in longitudinal section.
  • the cover plate 30 has an additional ring 31.
  • This additional ring 31 has a second balancing pocket 33.
  • the second balancing pockets 33 in the additional ring 31 is still a second level for the balance obtained the balancing quality can be improved.
  • the additional ring 31 has below the second balancing pocket 33 in the opposite x-direction an annular material cut with a radius-shaped region 32.
  • Fig. 5 shows the section C - C through the bulges 23 of the blades 20 on the bottom plate 40 of a Trommeleltechnikrrads 10.
  • the bulges 23 have substantially a contour, that of the area 25 of the flow separation from Fig. 1 equivalent.
  • the balancing pockets 24 have, for example, a rectangular cross section, so that suitable rectangular balancing weights can be pressed into the balancing pockets 24 in a form-fitting manner. Other balancing pocket and balancing weights geometries are also possible.
  • Fig. 6 shows a flow pattern on a drum rotor 10 according to the invention.
  • the bulge 23 is completely provided in the area 25 of the flow separation otherwise occurring during operation. If the bulge 23 is only in the region 25 of the flow separation, but substantially completely fills it, the vortex formation is almost completely prevented, as can be seen from the vortex arrows, and the efficiency of the Trommeleltechnikrrads 10 is optimized.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Centrifugal Separators (AREA)

Claims (8)

  1. Rotor à tambour (10), comportant un grand nombre de pales (20) courtes et courbées vers l'avant, les pales (20) présentant un côté aspiration (21) et un côté refoulement (22), une plaque de couverture (30) et une plaque de fond (40), le rotor à tambour (10) comportant au moins une pale (20) qui présente une convexité (23) sur son côté aspiration (21), la convexité (23) étant reliée à la plaque de fond (40) et la convexité (23) étant prévue entièrement dans la zone d'une interruption de flux (25) survenant autrement en service, caractérisé en ce que la convexité (23) comporte en outre une poche d'équilibrage (24) qui va jusque dans la plaque de fond (40) et la traverse, la plaque de couverture (30) comportant une bague supplémentaire (31) sur son côté extérieur, le contour intérieur de la bague supplémentaire (31) présentant une zone en forme de rayon (32).
  2. Rotor à tambour (10) selon la revendication 1,
    caractérisé en ce que
    la convexité (23) est, en direction axiale x, réalisée plus courte que l'extension axiale de la pale (20).
  3. Rotor à tambour (10) selon la revendication 1,
    caractérisé en ce que
    la poche d'équilibrage (24) va jusque dans la plaque de couverture (30).
  4. Rotor à tambour (10) selon la revendication 3,
    caractérisé en ce que
    la poche d'équilibrage (24) traverse la plaque de couverture (30).
  5. Rotor à tambour (10) selon l'une des revendications précédentes, caractérisé en ce que
    toutes les pales (20) présentent une convexité (23).
  6. Rotor à tambour (10) selon l'une des revendications précédentes,
    caractérisé en ce que la convexité (23) correspond sensiblement, en direction radiale, à la forme de la zone de l'interruption de flux (25).
  7. Rotor à tambour (10) selon l'une des revendications précédentes,
    caractérisé en ce que
    la bague supplémentaire (31) présente au moins une deuxième poche d'équilibrage (33).
  8. Rotor à tambour (10) selon l'une des revendications précédentes,
    caractérisé en ce que
    la bague supplémentaire (31) comporte, en dessous de la deuxième poche d'équilibrage (33), dans le sens opposé à la direction x, une entaille annulaire ménagée dans la matière.
EP15161266.0A 2014-04-11 2015-03-27 Rotor à tambour avec poches d'équlibrage Active EP2930372B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI201530134T SI2930372T1 (en) 2014-04-11 2015-03-27 Wheel of drum rotor with center pockets

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014207059 2014-04-11
DE102014208372.9A DE102014208372A1 (de) 2014-04-11 2014-05-05 Wuchttaschen

Publications (2)

Publication Number Publication Date
EP2930372A1 EP2930372A1 (fr) 2015-10-14
EP2930372B1 true EP2930372B1 (fr) 2017-09-27

Family

ID=53058897

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15161266.0A Active EP2930372B1 (fr) 2014-04-11 2015-03-27 Rotor à tambour avec poches d'équlibrage

Country Status (7)

Country Link
US (1) US9909423B2 (fr)
EP (1) EP2930372B1 (fr)
CN (2) CN204828033U (fr)
DE (2) DE102014208372A1 (fr)
ES (1) ES2653529T3 (fr)
HU (1) HUE037743T2 (fr)
SI (1) SI2930372T1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD771235S1 (en) * 2014-04-11 2016-11-08 Ebm-Papst Mulfingen Gmbh & Co. Kg Fan drum rotor
US11105203B2 (en) 2018-01-29 2021-08-31 Carrier Corporation High efficiency centrifugal impeller with balancing weights
TWI681127B (zh) * 2018-02-01 2020-01-01 大陸商佛山市建準電子有限公司 離心扇及其扇輪

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007003416A1 (fr) * 2005-07-04 2007-01-11 Behr Gmbh & Co. Kg Turbine

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5331206A (en) * 1976-09-06 1978-03-24 Hitachi Ltd Fan with forward blades
DE4136293B4 (de) * 1990-11-03 2004-08-26 Papst Licensing Gmbh & Co. Kg Laufrad für ein Gebläse, insbesondere Radialgebläse
US6042335A (en) * 1998-05-04 2000-03-28 Carrier Corporation Centrifugal flow fan and fan/orifice assembly
JP2006077723A (ja) * 2004-09-13 2006-03-23 Matsushita Electric Ind Co Ltd 多翼ファン
US8167562B2 (en) * 2007-06-29 2012-05-01 Denso Corporation Centrifugal fan and blower having the same
DE212009000007U1 (de) * 2008-05-27 2010-08-19 Ebm-Papst St. Georgen Gmbh & Co. Kg Radiallüfter
JP2010031664A (ja) * 2008-07-25 2010-02-12 Denso Corp 遠心式多翼ファン
JP5634782B2 (ja) * 2009-08-11 2014-12-03 山洋電気株式会社 遠心ファン
JP5287772B2 (ja) * 2010-03-16 2013-09-11 株式会社デンソー 遠心式多翼ファン
DE102011000208A1 (de) * 2011-01-19 2012-07-19 Minebea Co., Ltd. Laufrad für ein Gebläse
DE202012103554U1 (de) * 2012-09-18 2013-12-20 Ebm-Papst Mulfingen Gmbh & Co. Kg Laufrad mit Wuchtausgleich

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007003416A1 (fr) * 2005-07-04 2007-01-11 Behr Gmbh & Co. Kg Turbine

Also Published As

Publication number Publication date
CN104976151A (zh) 2015-10-14
ES2653529T3 (es) 2018-02-07
SI2930372T1 (en) 2018-01-31
HUE037743T2 (hu) 2018-09-28
CN204828033U (zh) 2015-12-02
US20150292331A1 (en) 2015-10-15
DE202015101563U1 (de) 2015-04-28
DE102014208372A1 (de) 2015-10-15
EP2930372A1 (fr) 2015-10-14
US9909423B2 (en) 2018-03-06

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