EP1046822A2 - Soufflante et boítier helicoidal - Google Patents

Soufflante et boítier helicoidal Download PDF

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Publication number
EP1046822A2
EP1046822A2 EP00108259A EP00108259A EP1046822A2 EP 1046822 A2 EP1046822 A2 EP 1046822A2 EP 00108259 A EP00108259 A EP 00108259A EP 00108259 A EP00108259 A EP 00108259A EP 1046822 A2 EP1046822 A2 EP 1046822A2
Authority
EP
European Patent Office
Prior art keywords
curvature
blade
cover plate
blower according
outside
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
EP00108259A
Other languages
German (de)
English (en)
Other versions
EP1046822A3 (fr
EP1046822B1 (fr
Inventor
Thomas Nawrot
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete 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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP1046822A2 publication Critical patent/EP1046822A2/fr
Publication of EP1046822A3 publication Critical patent/EP1046822A3/fr
Application granted granted Critical
Publication of EP1046822B1 publication Critical patent/EP1046822B1/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
    • 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
    • F04D29/66—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

Definitions

  • the invention relates to a blower with a rotatably mounted in a spiral housing Rotor with blades distributed around the circumference and a concentric suction opening, that of a cover disk connected on one side to the blades is surrounded such that the flow in the central space sector of the rotor of the intake opening coming through the. in an arc of approximately 90 ° Buckets is deflected through, especially blowers of this type for the promotion of process air or cooling air in a household clothes dryer.
  • Such a blower is known from DE 31 37 554 A1. In it takes over central passage of the cover plate that from the almost congruent with the passage Intake opening of an inflow gas.
  • the cover plate is also nozzle-shaped in the area of its passage towards the suction opening molded. The aim is to achieve a flow that is as uniform as possible. There but the flow paths in the inside of the deflection are shorter than in the outside and also the nozzle-shaped passage of the Cover disk gas rubbing along is subject to friction, in particular vertebrae on the nozzle-shaped inside of the cover disk.
  • Such swirls prevent separation-free flow and set the efficiency of the blower greatly down.
  • these vortices provide additional noise in the blower, which when used as in household tumble dryers be particularly annoying.
  • the invention has for its object fans of the type mentioned to improve in terms of their efficiency and at the same time their operating noise to diminish.
  • this object is achieved in that the cover plate facing side of each blade forms a multi-curved line that at least stands almost vertically on the outside of the bucket and moves away from there bends outward to one near the suction opening to the shovel to form an open arc, and at a distance from the suction opening in about Height ends.
  • the specified shaping of the blade sides facing the cover disk leads to a toroidal ring-shaped flow in the interior sector of the arches of the Blade sides.
  • This toroidal flow directs the main flow with minimal Low friction in an arc of approximately 90 ° from the intake opening the blades outwards. This increases the fan efficiency.
  • the delivery rate of the blower increases for a given drive power. At the same time the operating noise of the fan is reduced.
  • the outer curvature of the blade side as a circular arc advantageously supports the formation of a toroidal flow described above.
  • An embodiment of the blower according to the invention has proven to be particularly advantageous proven, in which the outer curvature forms an approximate semicircle and continuously merges into the counter-curvature that approximates Quarter circle and at least approximately perpendicular to the line on the outside the shovel is standing.
  • the desired currents are as above described best set. It can also be helpful here if the radius of the outer curvature coincides with the radius of the counter-curvature.
  • the profile of the cover plate is advantageously the curvature of the blade sides customized. Then if the one adjacent to the outer curvature of the cover plate Section of the wall of the volute to her a backflow allowable distance and has approximately the same profile as that External curvature of the cover plate, the backflow can flow unhindered.
  • the distance between the wall and the cover plate decreases in the direction from the outside of the bucket to the suction opening and has it at the slot between the suction opening and the central passage of the cover plate the smallest Dimension. Then it is possible to reverse flow in the area of Intake opening convey such a high speed that it slows down inflowing main flow in the mixing area entrains and swirled with her to the toroidal flow.
  • the invention is based on an exemplary embodiment shown in the drawing explained below.
  • the drawing shows a section through a fan according to the invention along a plane running through the axis 1 of the rotor 2.
  • the rotor 2 On the bottom pane 3, the rotor 2 is mounted on the shaft 4 in the housing of the fan and at the same time driven by a motor, not shown.
  • the rotor essentially by a group of blades 5 evenly distributed around the circumference formed between the bottom plate 3 and a suction-side cover plate 6 are clamped.
  • the rotor 2 is through to an intake opening 7 surround a spiral housing 8, the spiral shape of which cannot be seen here and for the present invention is also not significant.
  • the blades 5 have a shape that differs from a rectangle Form that the sides 51 facing the cover plate 6 have a section 52 (external curvature), which is bulged at least almost in the form of a circular arc, and one have another section 53 (counter-curvature), which also at least is almost curved inwards and finally approximated stands at right angles on the outside 54 of the airfoil 5.
  • the inner surface 51 now forms Cover plate 6, whose profile in the example shown the shape of the blade sides 51 is adapted, a ring and roller-shaped - a so-called toroidal - Flow 9, which ensures that the main flow 10 is almost free of separation is steered continuously around the inner circumference of the cover plate 6. It glides the main flow 10 almost smoothly across the toroid flow 9, so that the efficiency of air pressure generation improves considerably. Moreover the toroidal flow 9 forms a damping against any that may arise Noises. On the other hand, the toroidal flow prevents uncontrolled ones Vortex formation and the creation of noises from such vortices.
  • the formation of the toroidal flow 9 is extraordinary due to a backflow 11 promoted, which separates from the main flow outside the rotor 2 and between the cover plate 6 and the suction-side housing wall 12 for Edge area 71 of the suction opening 7 flows.
  • the invention is not restricted to the exemplary embodiment shown.
  • the spiral casing and the rotor can be shaped differently his.
  • the mutual success is essential for the solution of the task coordinated design of the housing (suction opening 7, inner edge 71, housing wall 12), the blades 5 and the cover plate 6.
  • the cover plate 6 the Spiral casing 8, the rotor 2 and the width of the latter

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP00108259A 1999-04-21 2000-04-14 Soufflante et boítier helicoidal Expired - Lifetime EP1046822B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19918085 1999-04-21
DE19918085A DE19918085A1 (de) 1999-04-21 1999-04-21 Gebläse mit einem Spiralgehäuse

Publications (3)

Publication Number Publication Date
EP1046822A2 true EP1046822A2 (fr) 2000-10-25
EP1046822A3 EP1046822A3 (fr) 2002-10-09
EP1046822B1 EP1046822B1 (fr) 2004-11-10

Family

ID=7905355

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00108259A Expired - Lifetime EP1046822B1 (fr) 1999-04-21 2000-04-14 Soufflante et boítier helicoidal

Country Status (2)

Country Link
EP (1) EP1046822B1 (fr)
DE (2) DE19918085A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007128641A1 (fr) * 2006-05-10 2007-11-15 BSH Bosch und Siemens Hausgeräte GmbH SÉchoir À condensation comprenant une spirale À air de procÉdÉ et procÉdÉ pour sÉcher dans un tel sÉchoir À condensation

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202009018770U1 (de) 2009-02-12 2013-03-07 Ebm-Papst Mulfingen Gmbh & Co. Kg Radial- oder Diagonal-Ventilatorrad
SI2218917T1 (sl) 2009-02-12 2013-05-31 Ebm-Papst Mulfingen Gmbh & Co. Kg Radialno ali diagonalno ventilatorsko kolo
DE102010009566A1 (de) 2010-02-26 2011-09-01 Ebm-Papst Mulfingen Gmbh & Co. Kg Radial- oder Diagonal-Ventilatorrad
DE102012012511A1 (de) 2011-07-22 2013-01-24 BSH Bosch und Siemens Hausgeräte GmbH Gebläse, vorzugsweise für ein Hausgerät
DE102012221916A1 (de) 2012-11-29 2014-06-05 BSH Bosch und Siemens Hausgeräte GmbH Gehäuse für ein Radialgebläse und Radialgebläse

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3137554A1 (de) 1981-09-22 1983-03-31 Wilhelm Gebhardt Gmbh, 7112 Waldenburg "radialventilator"

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5115210A (en) * 1974-07-02 1976-02-06 Rotoron Inc Zatsuongenshono fuan
IT8134017V0 (it) * 1981-04-15 1981-04-15 Zanussi A Spa Industrie Asciugabiancheria con dispositivo di controllo del filtro per la filaccia.
DE4318580A1 (de) * 1993-06-04 1994-12-08 Sel Alcatel Ag Radialgebläse

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3137554A1 (de) 1981-09-22 1983-03-31 Wilhelm Gebhardt Gmbh, 7112 Waldenburg "radialventilator"

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007128641A1 (fr) * 2006-05-10 2007-11-15 BSH Bosch und Siemens Hausgeräte GmbH SÉchoir À condensation comprenant une spirale À air de procÉdÉ et procÉdÉ pour sÉcher dans un tel sÉchoir À condensation

Also Published As

Publication number Publication date
EP1046822A3 (fr) 2002-10-09
EP1046822B1 (fr) 2004-11-10
DE50008560D1 (de) 2004-12-16
DE19918085A1 (de) 2000-10-26

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