DE1017470B - Centrifugal pump with hydraulic sealing of the shaft gap by an auxiliary conveyor wheel during operation and with a shaft gap valve actuated by axial shaft displacement to seal the shaft gap during standstill - Google Patents

Centrifugal pump with hydraulic sealing of the shaft gap by an auxiliary conveyor wheel during operation and with a shaft gap valve actuated by axial shaft displacement to seal the shaft gap during standstill

Info

Publication number
DE1017470B
DE1017470B DEB34596A DEB0034596A DE1017470B DE 1017470 B DE1017470 B DE 1017470B DE B34596 A DEB34596 A DE B34596A DE B0034596 A DEB0034596 A DE B0034596A DE 1017470 B DE1017470 B DE 1017470B
Authority
DE
Germany
Prior art keywords
shaft
shaft gap
gap
centrifugal pump
slip ring
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.)
Pending
Application number
DEB34596A
Other languages
German (de)
Inventor
Paul Bungartz
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 DEB34596A priority Critical patent/DE1017470B/en
Publication of DE1017470B publication Critical patent/DE1017470B/en
Pending 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
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/14—Shaft sealings operative only when pump is inoperative
    • F04D29/146—Shaft sealings operative only when pump is inoperative especially adapted for liquid pumps

Landscapes

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

Description

Kreiselpumpe mit hydraulischer Abdichtung des Wellenspaltes durch ein Hilfsförderrad beim Betrieb und mit einem durch axiale Wellenverschiebung betätigtem Wellenspaltventil zur Abdichtung des Wellenspaltes beim Stillstand Die Erfindung bezieht sich auf Kreiselpumpen mit einem Wellenspaltventil, welches durch axiale Wellenverschiebung beim Betrieb geöffnet und im Stillstand geschlossen wird.Centrifugal pump with hydraulic sealing of the shaft gap an auxiliary feed wheel in operation and with one actuated by axial shaft displacement Shaft gap valve for sealing the shaft gap during standstill The invention refers to centrifugal pumps with a shaft gap valve, which is driven by axial Shaft displacement is opened during operation and closed at standstill.

Sie bezweckt besonders die weitere Ausbildung solcher Pumpen, bei denen der Wellenspalt beim Betrieb hydraulisch durch ein Hilfsförderrad abgedichtet wird. Bei bekannten Pumpen dieser Art sind die Ventilflächen unnachgiebig am Pumpengehäuse bzw. am Läufer angeordnet, und sie werden im Stillstand mit der gleichen Kraft belastet, mit der auch der Läufer in die Ruhestellung zurückgezogen wird. Die Kraft, die notwendig ist, um den Läufer in die Ruhestellung zurückzuziehen, ergibt aber für die Ventilflächen meist eine zu starke Flächenpressung, die einen vorzeitigen Verschleiß bedingt oder die Ventilflächen, wenn sie aus empfindlichen Baustoffen wie Kohle od. dgl. bestehen, zerstört. Besonders diese Nachteile sollen durch die Erfindung behoben werden. Sie besteht im wesentlichen darin, daß das Wellenspaltventil aus einer Schleif ringdichtungbesteht, deren einer Schleifring in an sich bekannter Weise axial verschieblich angeordnet ist und unter Wirkung einer Federspannung steht und einen Bund trägt, durch den beim Öffnen des Ventils die axiale Verschiebung des Schleifringes durch Anlegen dieses Bundes an einen Anschlag begrenzt ist.It is particularly aimed at the further training of such pumps where the shaft gap is hydraulically sealed by an auxiliary feed wheel during operation will. In known pumps of this type, the valve surfaces are rigid on the pump housing or arranged on the rotor, and they are loaded with the same force at standstill, with which the runner is also withdrawn to the rest position. The power that is necessary is to retract the runner into the rest position, but results for the valve surfaces usually too high a surface pressure, which causes premature wear or the valve surfaces, if they are made of sensitive building materials such as coal or the like, destroyed. These disadvantages in particular are intended to be remedied by the invention. she consists essentially in the fact that the shaft gap valve consists of a slip ring seal, one slip ring of which is arranged axially displaceably in a manner known per se is and is under the action of a spring tension and carries a collar through which when opening the valve, the axial displacement of the slip ring by applying it this covenant is limited to one stop.

Das in der Zeichnung dargestellte und im nachfolgenden beschriebene Ausführungsbeispiel soll die Erfindung erläutern. Bei dem Ausführungsbeispiel ist der am Gehäuse angeordnete Schleifring a mit diesem durch einen Federungskörper b nachgiebig und dicht verbunden. Bei geöffnetem Ventil legt sich der Schleifring u gegen einen Bund c am Gehäuse an. Die Federspannung zum Anpressen des einen Schleifringes a gegen den anderen kann bei dieser Anordnung unabhängig von der Federspannung der Feder d, die den Läufer beim Stillsetzen der Pumpe in die Ruhestellung zurückzieht, bestimmt werden. Außerdem hat diese Ausführung noch den Vorzug, daß das durch die beiden Schleifringe gebildete Wellenspaltventil beim Stillsetzen der Pumpe schon bei geringem Abfall der Drehzahl geschlossen wird, und zwar bevor das Hilfsförderrad, welches die Welle beim Betrieb abdichtet, unwirksam wird.That shown in the drawing and described below Exemplary embodiment is intended to explain the invention. In the embodiment is arranged on the housing slip ring a with this by a spring body b yielding and tightly connected. When the valve is open, the slip ring settles u against a collar c on the housing. The spring tension for pressing one slip ring a against the other can in this arrangement regardless of the spring tension of the Spring d, which pulls the rotor back into the rest position when the pump is stopped, to be determined. In addition, this version has the advantage that the shaft gap valve formed by both slip rings when the pump is stopped is closed with a slight drop in speed, namely before the auxiliary feed wheel, which seals the shaft during operation becomes ineffective.

hei dein dargestellten Ausführungsbeispiel ist der Schleifring cz. mit dem Gehäuse durch einen Federbalg verbunden, der eine dichte Verbindung bewirkt und außerdem die Federkraft erzeugt, die zum .'Anpressen der Dichtflächen der Schleifringe notwendig ist.In your illustrated embodiment, the slip ring is cz. connected to the housing by a bellows, which creates a tight connection and also generates the spring force that is used to press the sealing surfaces of the slip rings necessary is.

Claims (2)

PATENTANSPRÜCHE: 9.. Kreiselpumpe mit hydraulischer Abdichtung des Wellenspaltes durch ein Hilfsförderrad beim Betrieb und mit einem durch axiale Wellenverschiebung betätigten Wellenspaltventil zur Al)-dichtung des Wellenspaltes beim Stillstand, dadurch gekennzeichnet, daß das Wellenspaltventil aus einer Schleifringdichtung besteht, deren einer Schleifring in an sich bekannter Weise axial verschieblich angeordnet ist und unter Wirkung einer Federspannung steht und einen Bund trägt, durch den bei Öffnung des Ventils die axiale Verschiebung des Schleifringes durch Anlegen des Bundes an einen Anschlag begrenzt ist. PATENT CLAIMS: 9 .. Centrifugal pump with hydraulic sealing of the Shaft gap through an auxiliary conveyor wheel during operation and with one through axial shaft displacement actuated shaft gap valve for Al) sealing of the shaft gap at standstill, characterized in that the shaft gap valve consists of a slip ring seal consists, one slip ring of which is axially displaceable in a manner known per se is arranged and is under the action of a spring tension and carries a collar, due to the axial displacement of the slip ring when the valve is opened Creation of the federal government is limited to a stop. 2. Kreiselpumpe nach Anspruch 1, dadurch gekennzeichnet, daß der verschieblich angeordnete Schleifring in an sich bekannter Weise durch einen Federbalg mit dem ihm zugeordneten Pumpenteil abdichtend verbunden ist. In Betracht gezogene Druckschriften: Deutsche Patentschriften Nr. 8-13 813, 609 631; britische Patentschrift Nr. 644 326.2. Centrifugal pump according to claim 1, characterized in that the slidably arranged slip ring in itself in a known manner, sealing by means of a bellows with the pump part assigned to it connected is. Considered publications: German Patent Specifications No. 8-13 813, 609 631; British Patent No. 644 326.
DEB34596A 1955-02-21 1955-02-21 Centrifugal pump with hydraulic sealing of the shaft gap by an auxiliary conveyor wheel during operation and with a shaft gap valve actuated by axial shaft displacement to seal the shaft gap during standstill Pending DE1017470B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB34596A DE1017470B (en) 1955-02-21 1955-02-21 Centrifugal pump with hydraulic sealing of the shaft gap by an auxiliary conveyor wheel during operation and with a shaft gap valve actuated by axial shaft displacement to seal the shaft gap during standstill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB34596A DE1017470B (en) 1955-02-21 1955-02-21 Centrifugal pump with hydraulic sealing of the shaft gap by an auxiliary conveyor wheel during operation and with a shaft gap valve actuated by axial shaft displacement to seal the shaft gap during standstill

Publications (1)

Publication Number Publication Date
DE1017470B true DE1017470B (en) 1957-10-10

Family

ID=6964352

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB34596A Pending DE1017470B (en) 1955-02-21 1955-02-21 Centrifugal pump with hydraulic sealing of the shaft gap by an auxiliary conveyor wheel during operation and with a shaft gap valve actuated by axial shaft displacement to seal the shaft gap during standstill

Country Status (1)

Country Link
DE (1) DE1017470B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE609631C (en) * 1931-12-29 1935-02-20 Siemens Schuckertwerke Akt Ges Shaft seal for an electric motor directly driving a centrifugal pump
GB644326A (en) * 1946-08-08 1950-10-11 Stojimir Dobrosavljevic Improvements in universal tight packing susceptible of acting at the same time as a tight bearing and tight centering element
DE843813C (en) * 1948-01-23 1952-07-14 Filton Ltd Liquid seal for rotating machines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE609631C (en) * 1931-12-29 1935-02-20 Siemens Schuckertwerke Akt Ges Shaft seal for an electric motor directly driving a centrifugal pump
GB644326A (en) * 1946-08-08 1950-10-11 Stojimir Dobrosavljevic Improvements in universal tight packing susceptible of acting at the same time as a tight bearing and tight centering element
DE843813C (en) * 1948-01-23 1952-07-14 Filton Ltd Liquid seal for rotating machines

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