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DE9103741U1 - Dragline bucket - Google Patents

Dragline bucket

Info

Publication number
DE9103741U1
DE9103741U1 DE9103741U DE9103741U DE9103741U1 DE 9103741 U1 DE9103741 U1 DE 9103741U1 DE 9103741 U DE9103741 U DE 9103741U DE 9103741 U DE9103741 U DE 9103741U DE 9103741 U1 DE9103741 U1 DE 9103741U1
Authority
DE
Germany
Prior art keywords
entry
swirl
dragline bucket
suction shaft
betai
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
DE9103741U
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.)
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
Application filed by Individual filed Critical Individual
Priority to DE9103741U priority Critical patent/DE9103741U1/en
Publication of DE9103741U1 publication Critical patent/DE9103741U1/en
Priority to DE19924203359 priority patent/DE4203359A1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2261—Rotors specially for centrifugal pumps with special measures
    • F04D29/2277—Rotors specially for centrifugal pumps with special measures for increasing NPSH or dealing with liquids near boiling-point
    • 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
    • F04D29/181—Axial flow rotors

Landscapes

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

Description

Anmelder und Erfinder :Applicant and inventor:

Dipl.-Ing. Helmut Mayer
Simmerner Str. 3
D-5407 Boppard (Rhein)Dipl.-Ing. Helmut Mayer
Simmerner Str. 3
D-5407 Boppard (Rhine)

" SCHLEPPSCHAUFEL "" DRAG BUCKET "

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

Gebrauchsmuster G 90 03 157.1, eingetragen für denselben Anmelder, bezeichnet einen solchen Rohr-Rad Verbund als "Saugwellenrad" und sclägt eine Beschaufelung für besseren Wirkungsgrad und geringen Achsschub vor. Dies wird durch eine größere Anzahl kürzerer Schaufeln erreicht, die an einem Eintrittsdurchmesser beginnen, der größer als der eines üblichen Normalrades mit rückseitiger Nabe ist.Utility model G 90 03 157.1, registered for the same applicant, designates such a tube-wheel combination as a "suction shaft wheel" and suggests blading for better efficiency and low axial thrust. This is achieved by a larger number of shorter blades that start at an inlet diameter that is larger than that of a conventional normal wheel with a rear hub.

In der Beschreibung des Gegenstandes sind die Eintrittswinkel dieser Beschaufelung als kleiner werdend beschrieben. Unter den Schutzansprüchen wurde darauf nicht eingegangen.In the description of the object, the entry angles of this blading are described as decreasing. This was not addressed in the protection claims.

Von Nachteil sind kleine Winkel für den Eintritt, wenn die Saugwelle ein großer Drallgeber ist. Beim größtmöglichen Drall rotiert das Fördermedium wie ein starrer Körper mit der Winkelgeschwindigkeit der Saugwelle.Small angles for the entry are disadvantageous if the suction shaft is a large swirler. With the greatest possible swirl, the conveying medium rotates like a rigid body at the angular velocity of the suction shaft.

Die erfindugsgemäße Schaufel wird deshalb vorteilhaft für den größtmöglichen Drall mit dem Eintrittswinkel Betai = 90° versehen. Bei geringerer Drallvorgabe ist sie eine "Schleppschaufel", die den Minderdrall als Förderhöhenanteil zum stoßfreien Eintritt aufschleppt.The blade according to the invention is therefore advantageously provided with the entry angle Betai = 90° for the greatest possible swirl. With a lower swirl specification, it is a "drag blade" which drags the reduced swirl as a delivery head component for shock-free entry.

Der Austrittswinkel Beta2 wird damit bei normaler Schaufelkrümmung ebenfalls größer als derjenige herkömmlicher, bekannter, nach rückwärts gekrümmter Schaufeln.The exit angle Beta2 is therefore also larger with normal blade curvature than that of conventional, known backward-curved blades.

Claims (1)

Schutzanspruch :Protection claim: 1. Schleppschaufel für Pumpenlaufräder mit rotierender, drallgebender Hohlwelle (Saugwellenrad) von gutem Wirkungsgrad, geringem Achsschub und stoßfreiem Eintritt, dadurch gekennzeichnet, daß ihr Eintrittswinkel Betai = 90° beträgt.1. Drag blade for pump impellers with rotating, swirl-generating hollow shaft (suction shaft impeller) of good efficiency, low axial thrust and shock-free entry, characterized in that its entry angle Betai = 90°.
DE9103741U 1991-03-27 1991-03-27 Dragline bucket Expired - Lifetime DE9103741U1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE9103741U DE9103741U1 (en) 1991-03-27 1991-03-27 Dragline bucket
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 (1)

Application Number Priority Date Filing Date Title
DE9103741U DE9103741U1 (en) 1991-03-27 1991-03-27 Dragline bucket

Publications (1)

Publication Number Publication Date
DE9103741U1 true DE9103741U1 (en) 1991-06-27

Family

ID=6865714

Family Applications (1)

Application Number Title Priority Date Filing Date
DE9103741U Expired - Lifetime DE9103741U1 (en) 1991-03-27 1991-03-27 Dragline bucket

Country Status (1)

Country Link
DE (1) DE9103741U1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1040376B (en) * 1953-05-16 1958-10-02 Hans Moser Dipl Ing Dr Compensation device on motor-driven conveyor pumps for flowing media
DE9003157U1 (en) * 1990-03-17 1990-05-17 Mayer, Helmut, Dipl.-Ing., 5407 Boppard Suction shaft wheel
DE9017083U1 (en) * 1990-12-19 1991-03-07 Mayer, Helmut, Dipl.-Ing., 5407 Boppard Hollow shaft gear

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1040376B (en) * 1953-05-16 1958-10-02 Hans Moser Dipl Ing Dr Compensation device on motor-driven conveyor pumps for flowing media
DE9003157U1 (en) * 1990-03-17 1990-05-17 Mayer, Helmut, Dipl.-Ing., 5407 Boppard Suction shaft wheel
DE9017083U1 (en) * 1990-12-19 1991-03-07 Mayer, Helmut, Dipl.-Ing., 5407 Boppard Hollow shaft gear

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DE-Buch: Kreiselpumpen-Lexicon der Fa. KSB AG, D-6710 Frankenthal, S.270-271 *

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