EP0408956B1 - Roue ouverte à ailettes - Google Patents

Roue ouverte à ailettes Download PDF

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Publication number
EP0408956B1
EP0408956B1 EP90112515A EP90112515A EP0408956B1 EP 0408956 B1 EP0408956 B1 EP 0408956B1 EP 90112515 A EP90112515 A EP 90112515A EP 90112515 A EP90112515 A EP 90112515A EP 0408956 B1 EP0408956 B1 EP 0408956B1
Authority
EP
European Patent Office
Prior art keywords
impeller
fan
hub
outlet opening
flow
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.)
Expired - Lifetime
Application number
EP90112515A
Other languages
German (de)
English (en)
Other versions
EP0408956A2 (fr
EP0408956A3 (en
Inventor
Wolfgang Schmidtke
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.)
Linde GmbH
Original Assignee
Linde 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 Linde GmbH filed Critical Linde GmbH
Publication of EP0408956A2 publication Critical patent/EP0408956A2/fr
Publication of EP0408956A3 publication Critical patent/EP0408956A3/de
Application granted granted Critical
Publication of EP0408956B1 publication Critical patent/EP0408956B1/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
    • 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
    • F04D29/287—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps with adjusting means

Definitions

  • the invention relates to an impeller with a plurality of vanes arranged perpendicularly to the drive hub in a common plane, with a hollow section which is open in the direction of rotation and which has an axial inlet extension in the hub region and is provided with a radial outlet opening at the outer end.
  • Such impellers can be used, for example, as ventilation impellers for hot or cold gas circulation.
  • the wing cross sections of impellers are generally designed as aerodynamically shaped wing profiles.
  • the problem can arise that the flow profile is changed by icing of the blades, as a result of which the flow conditions deteriorate and the volume flow rate is reduced.
  • the speed of the impeller can at best be increased, but this has a disadvantageous effect on the noise level and the power consumption.
  • a generic impeller is known from DE-B-1 033 839, in which the impeller is located in a housing jacket in which an intake duct nozzle is arranged centrally. The air flow entering the impeller radially on the inside is therefore separated from the radially exiting air flow.
  • such an impeller can only be used in certain applications.
  • the present invention has for its object to provide a generic impeller available, which enables a high volume flow rate at low speed and a favorable energy exchange in cooling and heating processes.
  • each wing is provided with a deflecting element in the direction of the outflow side and that between the axial inlet extension and the radial outlet opening on the outflow side of the impeller to produce a circular flow, none of the air flow emerging from the outlet opening into the Inlet extension entering air flow separating component is arranged outside the wing area.
  • a box profile can be used as the hollow profile.
  • a radial flow is generated within each airfoil, which is deflected in the axial direction by the deflecting elements at the outer end and then onto the object to be loaded, e.g. a heat exchanger.
  • a partial flow of the flow deflected at the outer end of each wing is returned to the impeller hub by a negative pressure which is present in the hub region of the impeller as a result of the radial flow.
  • a circular flow thus arises on each vane, which, due to the superposition with the rotary movement of the impeller perpendicular to the circular flow, leads to a spiral radial flow flow between the impeller and the object to be charged with the volume flow.
  • Such a flow pattern favors the exchange of energy in cooling and heating processes and remains essentially unaffected by icing when used in the cooling area, since the radial flow does not change.
  • a constant high volume flow circulation is achieved with a relatively low speed, low noise level and low power consumption.
  • An impeller of the type according to the invention saves weight and space and is easy to manufacture, easy to clean and repair.
  • the flow formation of the impeller can be further improved if a baffle plate is arranged on the plane of the impeller opposite the hub inflow side.
  • the deflection elements For individual adaptation of the volume flow generated by the impeller to special environments, it is expedient to design the deflection elements to be adjustable.
  • impeller according to the invention in cold gas circulation in the freezer area is particularly advantageous because of the icing problem already described. But also for use in heating. and air conditioning technology, such an impeller proves to be well suited. It is also conceivable to use the impeller as a dispersing blade or for the gas entry in liquids or for mixing liquids of different densities.
  • the impeller consists of a hub 1 with vanes 2 arranged perpendicular to it and fastened thereon. For example, a total of three vanes can be provided.
  • the hub 1 is driven by a shaft 3, which is connected to a drive, not shown in the figures.
  • the impeller is arranged in front of a body 4 to be charged with a volume flow, which is not shown in detail. It can be a heat exchanger.
  • Each wing 2 consists of a box-shaped hollow profile which is of constant or tapering cross-section from the area near the hub to the outer end.
  • the hollow profile is open in the direction of rotation.
  • An axial inlet widening 5 facing the inflow side is provided in the wing region near the hub.
  • the hollow profile has a radial outlet opening 6, which can also be widened somewhat in the axial direction towards the outflow side.
  • a deflection element 7 is provided, which can be adjustable and is curved towards the outflow side.
  • a baffle plate 8 is arranged on the plane of the impeller opposite the hub inflow side.
  • the action of the impeller is as follows: The rotation in the direction of the open sides of the blades 2 creates radial flows on or in the hollow profiles, which emerge from the hollow profiles at the outer ends and are deflected by the deflecting elements in the axial direction, ie towards the body 4 become. This also creates a negative pressure in the area of the inlet extension 5, causing a partial flow from the axial Flow direction is returned, so that an internal wing flow forms (symbolized by arrows), which is brought into a spiral radial flow due to the rotary movement of the impeller.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Saccharide Compounds (AREA)
  • Polarising Elements (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Rotary Pumps (AREA)
  • Catalysts (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)

Claims (4)

  1. Roue à ailettes comprenant plusieurs ailettes (2) disposées perpendiculairement à un moyeu d'entraînement (1) dans un plan commun, chaque ailette étant ménagée par un profilé creux ouvert dans le sens de la rotation, qui comporte, dans le voisinage du moyeu, un prolongement axial d'entrée (5) et est munie à son extrémité extérieure d'une ouverture radiale de sortie (6), caractérisée en ce que chaque ailette (2) est munie d'un élément déviateur (7) incurvé du côté de l'écoulement de sortie et en ce que, entre le prolongement axial de sortie (5) et l'ouverture radiale de sortie (6) aucun composant séparant le courant d'air sortant de l'ouverture radiale de sortie (6) du courant d'air pénétrant dans le prolongement d'entrée (5) n'est disposé à l'extérieur de la zone des ailettes sur la face d'écoulement de sortie de la roue à ailettes, pour l'obtention d'un écoulement circulaire.
  2. Roue à ailettes selon la revendication 1, caractérisée en ce qu'un écran déflecteur (8) est disposé dans le plan de la roue à ailettes à l'opposé du prolongement d'entrée.
  3. Roue à ailettes selon l'une des revendications précédentes, caractérisée en ce que les éléments déviateurs (7) sont réglables.
  4. Application d'une roue à ailettes selon l'une des revendications 1 à 3, pour la circulation de gaz froid dans le domaine de la congélation.
EP90112515A 1989-07-18 1990-06-30 Roue ouverte à ailettes Expired - Lifetime EP0408956B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3923779 1989-07-18
DE3923779A DE3923779A1 (de) 1989-07-18 1989-07-18 Fluegelrad

Publications (3)

Publication Number Publication Date
EP0408956A2 EP0408956A2 (fr) 1991-01-23
EP0408956A3 EP0408956A3 (en) 1992-01-02
EP0408956B1 true EP0408956B1 (fr) 1995-01-18

Family

ID=6385307

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90112515A Expired - Lifetime EP0408956B1 (fr) 1989-07-18 1990-06-30 Roue ouverte à ailettes

Country Status (6)

Country Link
EP (1) EP0408956B1 (fr)
AT (1) ATE117411T1 (fr)
AU (1) AU632341B2 (fr)
BR (1) BR9003426A (fr)
DE (2) DE3923779A1 (fr)
ES (1) ES2069630T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2809481B1 (fr) * 2000-05-23 2002-08-16 Air Liquide Ventilateur destine notamment a equiper un tunnel de refrigeration de produits tels que des produits alimentaires et tunnel equipe d'un ensemble de ces ventilateurs
ITMI20021394A1 (it) * 2002-06-25 2003-12-29 Sol Spa Apparecchiatura di surgelazione particolarmente per prodotti alimentari atta a limitare l'inflitrazione di aria umida nella camera di surgel
US9126176B2 (en) 2012-05-11 2015-09-08 Caisson Technology Group LLC Bubble implosion reactor cavitation device, subassembly, and methods for utilizing the same
CN103452902B (zh) * 2013-08-21 2015-12-30 谢坤 压缩空气收集装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1074017A (en) * 1912-04-24 1913-09-23 William F Rothenberg Ventilating-fan.
US2104306A (en) * 1935-07-10 1938-01-04 Mcleod George Harnett Screw propeller
US2385070A (en) * 1941-10-08 1945-09-18 Gant Leslie Fan
DE1033839B (de) * 1956-03-15 1958-07-10 Rudolf Hingst Dipl Ing Geblaeselaufrad mit axialem Zufluss und entgegengesetzt axialem Abfluss
DE2627344C2 (de) * 1976-06-18 1985-11-14 Richard 4630 Bochum Engels Flügelrad eines Radialventilators

Also Published As

Publication number Publication date
ES2069630T3 (es) 1995-05-16
AU632341B2 (en) 1992-12-24
DE3923779A1 (de) 1991-01-31
BR9003426A (pt) 1991-08-27
DE59008287D1 (de) 1995-03-02
EP0408956A2 (fr) 1991-01-23
ATE117411T1 (de) 1995-02-15
AU5809490A (en) 1991-01-24
EP0408956A3 (en) 1992-01-02

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