DE2462064A1 - Centrifugal compressor for gases and vapours - has highly elastic thin blades of steel or plastic - Google Patents

Centrifugal compressor for gases and vapours - has highly elastic thin blades of steel or plastic

Info

Publication number
DE2462064A1
DE2462064A1 DE19742462064 DE2462064A DE2462064A1 DE 2462064 A1 DE2462064 A1 DE 2462064A1 DE 19742462064 DE19742462064 DE 19742462064 DE 2462064 A DE2462064 A DE 2462064A DE 2462064 A1 DE2462064 A1 DE 2462064A1
Authority
DE
Germany
Prior art keywords
blades
plastic
steel
highly elastic
gases
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
DE19742462064
Other languages
German (de)
Other versions
DE2462064B2 (en
DE2462064C3 (en
Inventor
Kurt Willy Dipl Ing Mugele
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to DE19742462064 priority Critical patent/DE2462064C3/en
Priority claimed from DE19742462064 external-priority patent/DE2462064C3/en
Publication of DE2462064A1 publication Critical patent/DE2462064A1/en
Publication of DE2462064B2 publication Critical patent/DE2462064B2/en
Application granted granted Critical
Publication of DE2462064C3 publication Critical patent/DE2462064C3/en
Expired legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D23/00Other rotary non-positive-displacement pumps
    • F04D23/008Regenerative pumps

Landscapes

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

Abstract

The compressor is of a centrifugal spiral type in which multiple acceleration produces a pressure ratio 10 to 15 times higher than can be achieved in a radial blower of similar dimensions. To reduce noise the product of the number of blades and the rotary speed is chosen to give the oscillation of the fluid at the inlet and discharge openings a frequency above the highest frequency discernible by the human ear. At low speeds this requires a large number of blades which is made possible by the use of very thin and highly elastic blades of steel or plastic which are either cast into slots in the hub or attached to the hub by adhesives.

Description

AKTIENGESELLSCHAE'T Erlangen, den 21.7.1975 Berlin und München Werner-von-Siemens-Str. 50AKTIENGESELLSCHAE'T Erlangen, July 21, 1975 Berlin and Munich Werner-von-Siemens-Str. 50

Unser Zeichen: VPA 74/3051 B Ch 21 MetOur reference: VPA 74/3051 B Ch 21 Met

Laufrad für einen Seitenkanal-RingverdichterImpeller for a side channel ring compressor

Die Erfindung "bezieht sich auf ein Laufrad für einen Seit enkanal-Ringverdi cht er.The invention "relates to an impeller for one side en-channel ring compressor.

Ringverdichter zum Förderndem Gasen und Dämpfen sind in mannigfacher Ausführung bekannt. Hierbei durchströmt das zu fördernde Medium den Verdichter auf einer schraubenförmigen Bahn, wobei durch die mehrfachen Beschleunigungen Drucksteigerungen erreicht werden, die 10 bis 15 mal höher sind als bei herkömmlichen Radialgebläsen gleicher Abmessung und gleicher Drehzahl. Ein besonders unangenehmes Problem ist der hohe Geräuschpegel dieser Verdichter, den man durch schalldämmende Konstruktionen beizukommen sucht (vgl. z.B. DT-Gbm 1 884 542).Ring compressors for conveying gases and vapors are in manifold execution known. The medium to be conveyed flows through the compressor in a helical manner Railway, whereby the multiple accelerations achieve pressure increases that are 10 to 15 times higher are of the same size and speed as with conventional radial fans. A particularly nasty problem is the high noise level of these compressors, which one tries to overcome by means of sound-absorbing constructions (see e.g. DT-Gbm 1 884 542).

Es wurde erkannt, daß sich eine beträchtliche Geräuschdämmung dann erzielen läßt, wenn das Produkt aus Schaufelzahl und Betriebsdrehzahl des Laufrades so gewählt wird, daß die Schwingungsmaxima des geförderten Mediums an den Saug- und Drucköffnungen der Pumpe eine über der Hörschwelle des menschlichen Ohres liegende Frequenz aufweisen.It has been recognized that considerable noise insulation can be achieved when the product of the number of blades and operating speed of the impeller is selected so that the vibration maxima of the conveyed medium at the suction and Pressure openings of the pump have a frequency above the hearing threshold of the human ear.

Bei relativ niedrigen Drehzahlen, z.B. 3000 Umdrehungen ist dann ein Laufrad mit relativ vielen Schaufeln erforderlich, das als Gußstück schwer herstellbar ist.At relatively low speeds, e.g. 3000 revs then an impeller with a relatively large number of blades is required, which is difficult to manufacture as a casting.

50 9 8 48/0313 21.7.197550 9 8 48/0313 July 21, 1975

- 2 - VPA 74/3051 B- 2 - VPA 74/3051 B

Die Aufgabe der Erfindung besteht in der Schaffung eines vielschaufligen Laufrad mit vorteilhaften Eigenschaften.The object of the invention is to create a multi-blade impeller with advantageous properties.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß' die Schaufeln aus hochelastischem Material, z.B. Stahl oder Kunststoff mit einer Dicke von unter 0,5 min bestehen und durch Eingießen oder Kleben in der Nabe befestigt sind. Auf diese Weise lassen sich die Schaufeln aus z.B. dem für Rasierklingen verwendeten Blechmaterial fertigen, angesichts der Biegsamkeit der dünnen Schaufelbleche kann dann gleichzeitig auch eine derartige Charakteristik der Ansaugmengen-Kennlinie über dem Druck erreicht werden, daß eine Überlastung des Antriebsmotors zuverlässig verhindert wird.This object is achieved according to the invention in that ' the blades are made of highly elastic material, e.g. steel or plastic with a thickness of less than 0.5 min and attached by casting or gluing in the hub. In this way the blades can be made from e.g. the sheet material used for razor blades, given the flexibility of the thin blades such a characteristic of the suction quantity curve can then be achieved at the same time as a function of the pressure, that reliably prevents overloading of the drive motor will.

Als Konstruktionsbeispiel sei ein Laufrad erwähnt, das einen Schaufelabstand von 2 mm an der Nabe und eine Schaufeldicke von 0,3 mm aufweist, wobei z.B. insgesamt 400 Schaufeln vorhanden sein könnten.An impeller with a blade spacing of 2 mm at the hub and a blade thickness should be mentioned as a design example 0.3 mm, for example a total of 400 blades could be.

509848/0313509848/0313

Claims (1)

- 3 - VPA 74/3051 B- 3 - VPA 74/3051 B PatentanspruchClaim Laufrad für einen Seitenkanal-Ringverdichter, dadurch gekennzeichnet, daß die Schaufeln aus hochelastischem Material, z.B. Stahl oder Kunststoff, mit. einer Dicke von unter 0,5 mm bestehen und durch Eingießen oder Kleben in der Nabe befestigt sind.Impeller for a side channel ring compressor, characterized in that the blades are made of highly elastic Material, e.g. steel or plastic, with. a thickness of less than 0.5 mm and by pouring or gluing are fixed in the hub. 509848/0313509848/0313
DE19742462064 1974-02-07 Impeller for a rare channel compressor Expired DE2462064C3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19742462064 DE2462064C3 (en) 1974-02-07 Impeller for a rare channel compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742462064 DE2462064C3 (en) 1974-02-07 Impeller for a rare channel compressor

Publications (3)

Publication Number Publication Date
DE2462064A1 true DE2462064A1 (en) 1975-11-27
DE2462064B2 DE2462064B2 (en) 1976-09-30
DE2462064C3 DE2462064C3 (en) 1977-05-26

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Also Published As

Publication number Publication date
DE2462064B2 (en) 1976-09-30

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Legal Events

Date Code Title Description
C3 Grant after two publication steps (3rd publication)
E77 Valid patent as to the heymanns-index 1977
EHJ Ceased/non-payment of the annual fee