DE4203359A1 - Drag blades for hermetic pump running wheel - receive delivery flow fed by attached, driven hollow shaft producing torsion, and have entry angle of 90 degrees - Google Patents

Drag blades for hermetic pump running wheel - receive delivery flow fed by attached, driven hollow shaft producing torsion, and have entry angle of 90 degrees

Info

Publication number
DE4203359A1
DE4203359A1 DE19924203359 DE4203359A DE4203359A1 DE 4203359 A1 DE4203359 A1 DE 4203359A1 DE 19924203359 DE19924203359 DE 19924203359 DE 4203359 A DE4203359 A DE 4203359A DE 4203359 A1 DE4203359 A1 DE 4203359A1
Authority
DE
Germany
Prior art keywords
hollow shaft
blade
entry angle
degrees
attached
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.)
Withdrawn
Application number
DE19924203359
Other languages
German (de)
Inventor
Helmut Dipl Ing Mayer
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.)
Individual
Original Assignee
Individual
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
Priority claimed from DE9103741U external-priority patent/DE9103741U1/de
Application filed by Individual filed Critical Individual
Priority to DE19924203359 priority Critical patent/DE4203359A1/en
Publication of DE4203359A1 publication Critical patent/DE4203359A1/en
Withdrawn legal-status Critical Current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
    • F04D29/18—Rotors
    • F04D29/186—Shaftless rotors
    • 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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/24—Vanes
    • F04D29/242—Geometry, shape

Abstract

The blade (1) has an entry angle of Beta 1 = 90 deg. for the torsion produced by the connected hollow shaft (2). With reduced torsion through the hollow shaft, the medium rotates at the entry edge inevitably at its peripheral speed, and therefore with the greatest possible torsion. The blade is then performing as a drag blade, with thrust-free entry. The outlet angle (Beta 2), with normal blade curvature, is greater than that with known rearwards curved blades. ADVANTAGE - A new blade geometry for use on the running wheels of hermetic pumps.

Description

Die Erfindung betrifft die Schaufeln eines Pumpenlaufrades, dem der Förderstrom durch eine mit ihm verbundene, angetrie­ bene, drallgebende Hohlwelle zufließt.The invention relates to the blades of a pump impeller, which the flow is driven by a connected to it flat, swirling hollow shaft flows in.

Die Eintrittswinkel Beta 1 von bisherigen Laufrädern dieser Art unterscheiden sich nicht von denen, wie sie für eine fest­ stehende Saugleitung gewählt werden. Sie bilden mit der Um­ fangsrichtung spitze Winkel.The entry angle Beta 1 from previous wheels of this Kind of no different from those for a fixed type vertical suction line can be selected. They form with the um direction of capture acute angle.

Von Nachteil sind kleine, spitze Winkel, wenn die Hohlwelle ein großer Drallgeber ist, und sich das Fördermedium an der Eintrittskante stößt. Beim größtmöglichen Drall rotiert das Fördermedium mit der Winkelgeschwindigkeit der Hohlwelle.Small, acute angles are a disadvantage when the hollow shaft is a large swirl device, and the pumping medium at the Leading edge bumps. This rotates at the greatest possible twist Pumped medium with the angular velocity of the hollow shaft.

Die erfindungsgemäße Schaufel 1 (Fig. 1) wird deshalb vorteil­ haft für den größtmöglichen von der Hohlwelle 2 (Fig. 1) erzeug­ ten Drall mit dem Eintrittswinkel Beta 1=90° versehen. Bei geringerer Drallvorgabe durch die Hohlwelle 2 rotiert das Me­ dium an der Eintrittskante zwangsläufig mit deren Umfangsge­ schwindigkeit, also dem größtmöglichen Drall. Die Schaufel 1 wird dann zur "Schleppschaufel", die den Minderdrall von der Hohlwelle 2 als Förderhöhenanteil zum stoßfreien Ein­ tritt aufschleppt. Der Austrittswinkel Beta 2 wird damit bei normaler Schaufelkrümmung ebenfalls größer als der­ jenige herkömmlicher, bekannter, nach rückwärts gekrümm­ ter Schaufeln.The blade 1 according to the invention ( FIG. 1) is therefore advantageously provided for the greatest possible swirl generated by the hollow shaft 2 ( FIG. 1) with the entry angle Beta 1 = 90 °. With a lower swirl specification by the hollow shaft 2 , the medium inevitably rotates at the leading edge with its circumferential speed, that is to say the greatest possible swirl. The blade 1 then becomes a "dragline blade", which entrains the minor twist from the hollow shaft 2 as a head portion for bumplessness. The exit angle Beta 2 is thus also larger with normal blade curvature than that of conventional, known, backward curved blades.

Anwendung finden soll die neue Schaufelgeometrie insbeson­ dere in hermetischen Pumpen.The new blade geometry is to be used in particular others in hermetic pumps.

Claims (1)

Schleppschaufel von hohem Wirkungsgrad für Pumpenlauf­ räder, denen eine fest mit ihnen verbundene, drallge­ bende Hohlwelle 2 vorgeschaltet ist, dadurch gekennzeich­ net, daß der Eintrittswinkel Beta 1 der Schaufeln 1 für den größtmöglichen Eintrittsdrall, der am Schaufelein­ tritt vorhanden ist, mit Beta 1=90° festgelegt ist, so daß das Fördermedium stoßfrei, ohne Energieverlust in die Beschaufelung eintritt.Drag vane of high efficiency for pump impellers, which is connected to a firmly connected, drallge-giving hollow shaft 2 , characterized in that the entry angle Beta 1 of the blades 1 for the greatest possible entry swirl that occurs at the blade, with Beta 1 = 90 ° is set so that the pumped medium enters the blading without bumping and without loss of energy.
DE19924203359 1991-03-27 1992-02-06 Drag blades for hermetic pump running wheel - receive delivery flow fed by attached, driven hollow shaft producing torsion, and have entry angle of 90 degrees Withdrawn DE4203359A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19924203359 DE4203359A1 (en) 1991-03-27 1992-02-06 Drag blades for hermetic pump running wheel - receive delivery flow fed by attached, driven hollow shaft producing torsion, and have entry angle of 90 degrees

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9103741U DE9103741U1 (en) 1991-03-27 1991-03-27
DE19924203359 DE4203359A1 (en) 1991-03-27 1992-02-06 Drag blades for hermetic pump running wheel - receive delivery flow fed by attached, driven hollow shaft producing torsion, and have entry angle of 90 degrees

Publications (1)

Publication Number Publication Date
DE4203359A1 true DE4203359A1 (en) 1992-10-01

Family

ID=25911568

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19924203359 Withdrawn DE4203359A1 (en) 1991-03-27 1992-02-06 Drag blades for hermetic pump running wheel - receive delivery flow fed by attached, driven hollow shaft producing torsion, and have entry angle of 90 degrees

Country Status (1)

Country Link
DE (1) DE4203359A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19523661A1 (en) * 1995-06-29 1997-01-02 Mayer Helmut Self-supporting turbo-rotor e.g. for multistage pumps, blowers compressor and turbines
DE102012103965A1 (en) 2012-05-07 2013-11-07 Contitech Transportbandsysteme Gmbh Conveying system with a shock absorption-resistant conveyor belt

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2312848A (en) * 1941-01-07 1943-03-02 Albert R Pezzillo Motor driven pump unit
US2524269A (en) * 1946-10-14 1950-10-03 Sta Rite Products Inc Pump
DE1040376B (en) * 1953-05-16 1958-10-02 Hans Moser Dipl Ing Dr Compensation device on motor-driven conveyor pumps for flowing media
US3291056A (en) * 1965-04-22 1966-12-13 William W Steinman Electric motor pump
DE9003157U1 (en) * 1990-03-17 1990-05-17 Mayer, Helmut, Dipl.-Ing., 5407 Boppard, De

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2312848A (en) * 1941-01-07 1943-03-02 Albert R Pezzillo Motor driven pump unit
US2524269A (en) * 1946-10-14 1950-10-03 Sta Rite Products Inc Pump
DE1040376B (en) * 1953-05-16 1958-10-02 Hans Moser Dipl Ing Dr Compensation device on motor-driven conveyor pumps for flowing media
US3291056A (en) * 1965-04-22 1966-12-13 William W Steinman Electric motor pump
DE9003157U1 (en) * 1990-03-17 1990-05-17 Mayer, Helmut, Dipl.-Ing., 5407 Boppard, De

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19523661A1 (en) * 1995-06-29 1997-01-02 Mayer Helmut Self-supporting turbo-rotor e.g. for multistage pumps, blowers compressor and turbines
DE102012103965A1 (en) 2012-05-07 2013-11-07 Contitech Transportbandsysteme Gmbh Conveying system with a shock absorption-resistant conveyor belt
WO2013167442A1 (en) 2012-05-07 2013-11-14 Contitech Transportbandsysteme Gmbh Conveying installation having an impact‑absorption‑resistant conveying belt

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8122 Nonbinding interest in granting licenses declared
8130 Withdrawal