EP1046822A2 - Gebläse mit einem Spiralgehäuse - Google Patents
Gebläse mit einem Spiralgehäuse Download PDFInfo
- 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
Links
- 238000001816 cooling Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 238000013016 damping Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Images
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)
Abstract
Description
Claims (8)
- Gebläse mit einem in einem Spiralgehäuse drehbar gelagerten Rotor mit am Umfang verteilten Schaufeln und einer konzentrischen Ansaugöffnung, die von einer mit den Schaufeln einseitig verbundenen Deckscheibe derart umgeben ist, daß die Strömung im zentralen Raumsektor des Rotors von der Ansaugöffnung kommend in einem Bogen von annähernd 90° durch die Schaufeln hindurch umgelenkt wird, insbesondere Gebläse dieser Art für die Förderung von Prozeßluft oder Kühlluft in einem Haushaltwäschetrockner, dadurch gekennzeichnet, daß die der Deckscheibe zugewandte Seite jeder Schaufel eine mehrfach gekrümmte Linie bildet, die wenigstens annähernd senkrecht auf der Außenseite der Schaufel steht und sich von dort nach außen krümmt, um in der Nähe der Ansaugöffnung einen zur Schaufel hin offenen Bogen zu bilden, und mit Abstand zur Ansaugöffnung etwa in deren Höhe endet.
- Gebläse nach Anspruch 1, dadurch gekennzeichnet, daß die Außenkrümmung der Schaufelseite ein Kreisbogen ist.
- Gebläse nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die an die Außenkrümmung der Schaufelseite anschließende, auf die Außenseite der Schaufel zulaufende Gegenkrümmung ein nach außen offener Kreisbogen ist.
- Gebläse nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß die Außenkrümmung einen angenäherten Halbkreis bildet und kontinuierlich in die Gegenkrümmung übergeht, die einen angenäherten Viertelkreis bildet und wenigsten annähernd senkrecht auf der Linie der Außenseite der Schaufel steht.
- Gebläse nach Anspruch 4, dadurch gekennzeichnet, daß der Radius der Außenkrümmung mit dem Radius der Gegenkrümmung übereinstimmt.
- Gebläse nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Profil der Deckscheibe der Krümmung der Schaufelseiten angepaßt ist.
- Gebläse nach Anspruch 6, dadurch gekennzeichnet, daß der der Außenkrümmung der Deckscheibe benachbarte Abschnitt der Wandung des Spiralgehäuses zu ihr einen eine Rückströmung zulassenden Abstand und ein angenähert gleiches Profil hat wie die Außenkrümmung der Deckscheibe.
- Gebläse nach Anspruch 7, dadurch gekennzeichnet, daß der Abstand der Wandung zur Deckscheibe sich in Richtung von der Schaufel-Außenseite auf die Ansaugöffnung vermindert und am Schlitz zwischen der Ansaugöffnung und dem zentralen Durchtritt der Deckscheibe die geringste Abmessung hat.
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 (de) | 2000-10-25 |
| EP1046822A3 EP1046822A3 (de) | 2002-10-09 |
| EP1046822B1 EP1046822B1 (de) | 2004-11-10 |
Family
ID=7905355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00108259A Expired - Lifetime EP1046822B1 (de) | 1999-04-21 | 2000-04-14 | Gebläse mit einem Spiralgehäuse |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1046822B1 (de) |
| DE (2) | DE19918085A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007128641A1 (de) * | 2006-05-10 | 2007-11-15 | BSH Bosch und Siemens Hausgeräte GmbH | Kondensationstrockner mit einer prozessluftspirale, und verfahren zum trocknen in einem solchen kondensationstrockner |
Families Citing this family (5)
| 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 |
| ES2404073T3 (es) | 2009-02-12 | 2013-05-23 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Rueda de ventilador radial o diagonal |
| 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)
| 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)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5115210A (en) * | 1974-07-02 | 1976-02-06 | Rotoron Inc | Zatsuongenshono fuan |
| IT8134017U1 (it) * | 1981-04-15 | 1982-10-15 | 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 |
-
1999
- 1999-04-21 DE DE19918085A patent/DE19918085A1/de not_active Withdrawn
-
2000
- 2000-04-14 DE DE50008560T patent/DE50008560D1/de not_active Expired - Lifetime
- 2000-04-14 EP EP00108259A patent/EP1046822B1/de not_active Expired - Lifetime
Patent Citations (1)
| 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)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007128641A1 (de) * | 2006-05-10 | 2007-11-15 | BSH Bosch und Siemens Hausgeräte GmbH | Kondensationstrockner mit einer prozessluftspirale, und verfahren zum trocknen in einem solchen kondensationstrockner |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1046822A3 (de) | 2002-10-09 |
| EP1046822B1 (de) | 2004-11-10 |
| DE50008560D1 (de) | 2004-12-16 |
| DE19918085A1 (de) | 2000-10-26 |
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