DE8802212U1 - Centrifugal fan impellers made of materials of different densities and strengths - Google Patents

Centrifugal fan impellers made of materials of different densities and strengths

Info

Publication number
DE8802212U1
DE8802212U1 DE8802212U DE8802212U DE8802212U1 DE 8802212 U1 DE8802212 U1 DE 8802212U1 DE 8802212 U DE8802212 U DE 8802212U DE 8802212 U DE8802212 U DE 8802212U DE 8802212 U1 DE8802212 U1 DE 8802212U1
Authority
DE
Germany
Prior art keywords
radial fan
materials
support disk
blades
strengths
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
Application number
DE8802212U
Other languages
German (de)
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.)
Werner Co
Original Assignee
Werner Co
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 Werner Co filed Critical Werner Co
Priority to DE8802212U priority Critical patent/DE8802212U1/en
Publication of DE8802212U1 publication Critical patent/DE8802212U1/en
Expired legal-status Critical Current

Links

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
    • F04D29/283—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 rotors of the squirrel-cage type

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

Radialventilatorräder-Trommelläufer aus Werkstoffen verschiedener Dichte und FestigkeitCentrifugal fan impellers made of materials of different densities and strengths

Die Erfindung betrifft Radialventilatorräder-Tronunelläufer, die eine Tragscheibe, einen Abdeckring und viele, dazwischen angeordnete Schaufeln aufweisen.The invention relates to radial fan wheels - rotors, which have a support disk, a cover ring and many blades arranged between them.

Solche Radialventilatorräder werden üblicherweise aus Stahl, Leichtmetall oder Kunststoff hergestellt.Such radial fan wheels are usually made of steel, light metal or plastic.

Die aus Stahlblech gefertigten Radialventilatorräder sind aufgrund der hohen Festigkeit und hohen Dichte von &tahl sehr formstabil und dadurch für hohe Beanspruchungen bestens ; geeignet, aber infolge der hohen Dichte des Werkstoffes schwer. Ihr hohes Einsatzgewicht bringt es mit sich, daß diese Radialventilatorräder zur Beseitigung von schädlicher Unwucht ausgewuchtet werden müssen. Des weiteren sind hohe Anlaufmomente der Antriebsmotoren notwendig, um solche Ventilatorräder zu beschleunigen.The radial fan wheels made of sheet steel are very dimensionally stable due to the high strength and high density of steel and are therefore ideally suited to high loads, but are heavy due to the high density of the material. Their high operating weight means that these radial fan wheels have to be balanced to eliminate harmful imbalance. In addition, high starting torques of the drive motors are necessary to accelerate such fan wheels.

Um diese Nachtelle zu vermeiden, werden die Radialventilator* räder aus Werkstoffen geringerer Dichte, beispielsweise Aluminium, hergestellt. Durch die gegenüber Stahl wesentlich geringere Dichte haben diese Räder ein erheblich niedrigeres Einsatzgewicht, wodurch die erforderliche Wuchtgüte ohne zusätzlichen Arbeitsgang erreicht werden kann und die netwendigen Anlaufmomente der Motoren zum Beschleunigen der Räder erheblich niedriger sind. Durch die geringere Festigkeit von Leichtmetallen gegenüber Stahl sind solche Radialventilatorräder jedoch wesentlich labiler und können deshalb nicht so hoch beansprucht werden.To avoid this disadvantage, the radial fan* wheels are made of materials with a lower density, such as aluminum. Due to the significantly lower density compared to steel, these wheels have a significantly lower operating weight, which means that the required balancing quality can be achieved without additional work and the necessary starting torque of the motors to accelerate the wheels is significantly lower. However, due to the lower strength of light metals compared to steel, such radial fan wheels are significantly more unstable and therefore cannot withstand such high loads.

Der Erfindung liegt die Aufgabe zugrunde, Radialventilfttorräder zu bauen, die bei niedrigem Einsatzgewicht für hohe Beanspruchung geeignet sind und die erforderliche Wuchtgute ohne Nachwuchten erreichen.The invention is based on the object of building radial valve impellers which are suitable for high loads with a low operating weight and which achieve the required balancing quality without rebalancing.

• t · · I• t · · I

Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Werkstoff aus dem die Schaufeln und der Abdeckring ge= fertigt sind» eine wesentlich geringere Dichte aufweist, als der Werkstoff fur die Tragscheibe. Da die Tragacheibe das bestimmende Bauelement für die Stabilität des Radialventilatorrades ist, wird erfindungsgemäß die Tragscheibe aus Werkstoff mit hoher Festigkeit und großer Dichte, z.B. Stahl hergestellt. Die Schaufeln und der Abdeckring, die wesentlich die unwucht bestimmen, bestehen dagegen aus Werkstoff mit geringerer Dichte und Festigkeit, 2.B. Aluminium. Durch die Kombination der beiden in Dichte und Festigkeit unterschiedlichen Werkstoffe erhält das Radialventilatorrad große Formstabilität und geringes Einsatzgewicht .The object is achieved according to the invention in that the material from which the blades and the cover ring are made has a significantly lower density than the material for the support disk. Since the support disk is the determining component for the stability of the radial fan wheel, according to the invention the support disk is made from a material with high strength and high density, e.g. steel. The blades and the cover ring, which essentially determine the imbalance, are made from a material with lower density and strength, e.g. aluminum. The combination of the two materials with different densities and strengths gives the radial fan wheel great dimensional stability and a low operating weight.

Ein Ausfuhrungsbeispiel eines erfindungsgemäßen Radialventilatorrades ist in der Zeichnung dargestellt und besteht aus der Tragscheibe 1, dem Abdeckring 2 und vielen, dazwischen angeordneten Schaufeln 3.An exemplary embodiment of a radial fan wheel according to the invention is shown in the drawing and consists of the support disk 1, the cover ring 2 and many blades 3 arranged in between.

Claims (4)

hehe 1. Radialventilatorrad-Trommelläufer aus Tragscheibe, Abdeckring und dazwischen angeordneten Schaufeln, dadurch gekennzeichnet, daß der Werkstoff für die Schaufeln (3) und den Abdeckring (2) eine wesentlich geringere Dichte aufweist als der Werkstoff für die Tragscheibe (1).1. Radial fan wheel drum rotor made of support disk, cover ring and blades arranged between them, characterized in that the material for the blades (3) and the cover ring (2) has a significantly lower density than the material for the support disk (1). 2. Radialventilatorrad nach Anspruch 1, dadurch gekennzeichnet, daß die Tragscheibe (1), der Abdeckring (2) unö die Schaufeln (3) unterschiedliche Werkstoffdicke aufweisen.2. Radial fan wheel according to claim 1, characterized in that the support disk (1), the cover ring (2) and the blades (3) have different material thicknesses. 3. Radialventilatorrad nach Anspruch 1, dadurch gekennzeichnet, daß die Tragscheibe (1), der Abdeckring (2) und die Schaufeln (3) gleiche Werkstoffdicke aufweisen.3. Radial fan wheel according to claim 1, characterized in that the support disk (1), the cover ring (2) and the blades (3) have the same material thickness. 4. Radialventilatorrad nach Anspruch 1, 2 und 3, dadurch gekennzeicnnet» daß die mechanische Festigkeit des Werkstoffs der Tragscheibe (1) Über der des Werkstoffs der Abdeckscheibe (2) und der Schaufeln (3) liegt.4. Radial fan wheel according to claim 1, 2 and 3, characterized in that the mechanical strength of the material of the support disk (1) is higher than that of the material of the cover disk (2) and the blades (3).
DE8802212U 1988-02-20 1988-02-20 Centrifugal fan impellers made of materials of different densities and strengths Expired DE8802212U1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8802212U DE8802212U1 (en) 1988-02-20 1988-02-20 Centrifugal fan impellers made of materials of different densities and strengths

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE8802212U DE8802212U1 (en) 1988-02-20 1988-02-20 Centrifugal fan impellers made of materials of different densities and strengths

Publications (1)

Publication Number Publication Date
DE8802212U1 true DE8802212U1 (en) 1988-07-07

Family

ID=6820900

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8802212U Expired DE8802212U1 (en) 1988-02-20 1988-02-20 Centrifugal fan impellers made of materials of different densities and strengths

Country Status (1)

Country Link
DE (1) DE8802212U1 (en)

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