DE963749C - Emptying device for gear pumps - Google Patents

Emptying device for gear pumps

Info

Publication number
DE963749C
DE963749C DED21502A DED0021502A DE963749C DE 963749 C DE963749 C DE 963749C DE D21502 A DED21502 A DE D21502A DE D0021502 A DED0021502 A DE D0021502A DE 963749 C DE963749 C DE 963749C
Authority
DE
Germany
Prior art keywords
pump
cylindrical
suction
gear pumps
pump housing
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
DED21502A
Other languages
German (de)
Inventor
Anton Dornenberg
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.)
ANTON DORNENBERG
Original Assignee
ANTON DORNENBERG
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 ANTON DORNENBERG filed Critical ANTON DORNENBERG
Priority to DED21502A priority Critical patent/DE963749C/en
Application granted granted Critical
Publication of DE963749C publication Critical patent/DE963749C/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
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/10—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by changing the positions of the inlet or outlet openings with respect to the working chamber
    • F04C14/12—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by changing the positions of the inlet or outlet openings with respect to the working chamber using sliding valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/06—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for stopping, starting, idling or no-load operation

Description

Die Vorrichtung soll die Entleerung von Zahnradpumpen ermöglichen, die zum Fördern verschiedener Flüssigkeiten in einem zylindrischen Schaltring mit ihrem ebenfalls zylindrischen Pumpengehäuse drehbar gelagert sind und jeweils vor dem Umschalten auf eine andere Flüssigkeit restlos entleert werden müssen.The device is intended to enable the emptying of gear pumps, for pumping various liquids in a cylindrical switching ring with their also cylindrical pump housing are rotatably mounted and in front of each must be completely emptied before switching to another liquid.

Dies wird nach der Erfindung dadurch erreicht, daß zum Zwecke des allseitigen Abschlusses der laufenden t'umpe im Saug- und im Druckkanal des zylindrischen Pumpengehäuses zwei axial in Richtung der Zahnradachsen verschiebbare Schieberkolben vorgesehen sind, die zur gleichzeitigen Steuerung außerhalb der Pumpe fest miteinander verbunden sind.This is achieved according to the invention in that for the purpose of all-round closure of the running pump in the suction and pressure channels of the cylindrical Pump housing two axially displaceable slide pistons in the direction of the gear axles are provided that are fixed to one another for simultaneous control outside the pump are connected.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt.An exemplary embodiment of the invention is shown in the drawing.

Die Zahnräder 3 und q. fördern in der bekannten Weise die Flüssigkeit durch einen der Saugstutzen des Schaltringes r über den freien Saugkanal des Pumpengehäuses :2 in die Druckseite des Gehäuses und des Schaltringes. Der Querschnitt des Saug-und Druckkanals im Pumpengehäuse ist zylindrisch zur Aufnahme der Schieberkolben 5 und 6. Diese Schieberkolben werden außerhalb der Pumpe durch den Bedienungshebel ? miteinander verbunden und sind gemeinsam axial verschiebbar.The gears 3 and q. promote the liquid in the known manner through one of the suction nozzles of the switching ring r via the free suction channel of the pump housing : 2 in the pressure side of the housing and the switching ring. The cross section of the suction and The pressure channel in the pump housing is cylindrical to accommodate the slide piston 5 and 6. These slide pistons are operated outside of the pump by the operating lever? together connected and are axially displaceable together.

Im Bereich der Zahnräder sind die Schieberkolben über den ganzen Saug- und Druckquerschnitt den Zahnradaußendurchmessern angepaßt.In the area of the gears, the spool pistons are positioned over the entire suction and pressure cross-section adapted to the outer diameter of the gear.

Das Entleeren der Pumpen erfolgt beim Laufen derselben. Wenn ein Pumpvorgang beendet ist, fördert die Pumpe über ein Überströmventil, welches die Druck- und Saugseite des jeweiligen Mediums kurzschließt. Jetzt werden die Schieberkolben 5 und 6 bei laufender Pumpe durch den Bedienungshebel 7 in den Saug- und Druckquerschnitt bis zur hinteren Stirnseite der Zahnräder hineingeschoben. Die durchfließende Menge wird immer kleiner, bis in der Endstellung sich keine Flüssigkeit mehr in den Räumen der SchieberkoIben befindet. Auch die Zahnlücken der Zahnräder sind restlos geleert, da der Zufluß durch den immer kleiner werdenden Saugquerschnitt in jedem Fall bei optimalem Vakuum geringer ist als der Abfluß durch Druck im jeweilig gleich großen Druckquerschnitt. Es kann nur ein Flüssigkeitsfilm in Abhängigkeit von der Präzision der Fertigung verbleiben, der praktisch bedeutungslos ist.The pumps are emptied while they are running. When a pumping action is finished, the pump delivers via an overflow valve, which the pressure and Short-circuits the suction side of the respective medium. Now the spool pistons 5 and 6 with the pump running through the operating lever 7 in the suction and pressure cross-section pushed in to the rear face of the gears. The amount flowing through gets smaller and smaller until there is no more liquid in the room in the end position the slide piston is located. The gaps between the teeth of the gears are also completely emptied, because the inflow due to the ever smaller suction cross-section in each case optimal vacuum is less than the outflow due to pressure in the respective same size Pressure cross-section. There can only be a liquid film depending on the precision remain of manufacturing, which is practically meaningless.

Claims (1)

PATENTANSPRUCH: Vorrichtung zur Entleerung von Zahnradpumpen, die zum Fördern verschiedener Flüssigkeiten in einem zylindrischen Schaltring mit ihrem ebenfalls zylindrischen Pumpengehäuse drehbar gelagert sind und jeweils vor dem Umschalten auf eine andere Flüssigkeit restlos entleert werden müssen, dadurch gekennzeichnet, daß zum Zwecke des allseitigen Abschlusses der laufenden Pumpe im Saug- und im Druckkanal des zylindrischen Pumpengehäuses zwei axial in Richtung der Zahnradachsen verschiebbare Schieberkolben vorgesehen sind, die zur gleichzeitigen Steuerung außerhalb der Pumpe fest miteinander verbunden sind.PATENT CLAIM: Device for emptying gear pumps that for conveying different liquids in a cylindrical switching ring with their also cylindrical pump housing are rotatably mounted and each in front of the Switching to another liquid must be completely emptied, characterized in that that for the purpose of all-round completion of the running pump in the suction and pressure channels of the cylindrical pump housing two axially displaceable in the direction of the gear axles Spool pistons are provided for simultaneous control outside the pump are firmly connected to each other.
DED21502A 1955-10-16 1955-10-16 Emptying device for gear pumps Expired DE963749C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED21502A DE963749C (en) 1955-10-16 1955-10-16 Emptying device for gear pumps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED21502A DE963749C (en) 1955-10-16 1955-10-16 Emptying device for gear pumps

Publications (1)

Publication Number Publication Date
DE963749C true DE963749C (en) 1957-05-09

Family

ID=7037106

Family Applications (1)

Application Number Title Priority Date Filing Date
DED21502A Expired DE963749C (en) 1955-10-16 1955-10-16 Emptying device for gear pumps

Country Status (1)

Country Link
DE (1) DE963749C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3162138A (en) * 1962-05-04 1964-12-22 Prematex S A Hydraulic gear engine, also adapted for use as a gear pump
DE3940036A1 (en) * 1989-12-04 1991-06-06 Rosemount Gmbh & Co METHOD AND DEVICE FOR MEASURING OXYGEN USING THE PARAMAGNETIC PROPERTIES OF THE OXYGEN

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3162138A (en) * 1962-05-04 1964-12-22 Prematex S A Hydraulic gear engine, also adapted for use as a gear pump
DE3940036A1 (en) * 1989-12-04 1991-06-06 Rosemount Gmbh & Co METHOD AND DEVICE FOR MEASURING OXYGEN USING THE PARAMAGNETIC PROPERTIES OF THE OXYGEN

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