Global Patent Index - EP 1101939 A2

EP 1101939 A2 2001-05-23 - Multicylinder piston pump

Title (en)

Multicylinder piston pump

Title (de)

Mehrzylindrige Kolbenpumpe

Title (fr)

Pompe à piston avec plusieurs cylindres

Publication

EP 1101939 A2 (DE)

Application

EP 00124637 A

Priority

DE 19955778 A

Abstract (en)

The piston pump (3) includes a number of preferably homogeneous butt-cylinder units (30), in whose cylinders (31) respectively one associated displacement butt (32) is led, and a gearing arrangement (34, 35) which converts the rotation of a common drive shaft (33) to a periodic oscillating translational lift movement of the butts in the respective cylinders. Each butt executes at least one full period of its oscillation per 360 degree rotation of the drive shaft, whereby the oscillation is composed of a suction interval, in which the butt executes a lift in a first direction for taking in the fluid in the corresponding cylinder, and a pump interval, in which the butt executes a lift in the opposite direction, for pressing the fluid out of the cylinder. The oscillations of the butts are equal to each other, and are displaced with respect to phase. The gearing arrangement is formed in such way, that the pump interval of each butt covers a larger part than the suction interval, with such ratio, that inhomogenities in the temporal course of the total conveyed current are smaller than at equal pump- and suction intervals.

Abstract (de)

Gegenstand der Erfindung ist eine Kolbenpumpe (3) mit einer Mehrzahl von Kolben-Zylinder-Einheiten (30) und einer Getriebeanordnung (34,35), welche die Drehbewegung einer gemeinsamen Antriebswelle (33) in eine periodisch oszillierende translatorische Hubbewegung der Kolben (32) in den jeweiligen Zylindern (31) umsetzt. Zur Reduzierung der Ungleichförmigkeiten im Förderstrom der Pumpe (3), die bedingt sind durch die einzelnen, zeitlich gegeneinander versetzten Förderhübe der Kolben (32), ist die Getriebeanordnung (34,35) derart ausgebildet, vorzugsweise unter Verwendung eines Nockenprofils (34), daß bei jedem Kolben (32) das Förderintervall einen größeren Teil der Oszillationsperiode belegt als das Saugintervall. Vorzugsweise wird zur Minimierung der Ungleichförmigkeit das Größenverhältnis von Förderintervall zu Saugintervall gleich oder annähernd gleich (2z-1) zu 1 bei z-Zylindern bemessen, gewünschtenfalls unter Hinzufügung eines zusätzlichen Korrekturfaktors zur Kompensation von Leckage und gegebenenfalls anderen Erscheinungen, die weitere Ungleichförmigkeiten im Förderstrom verursachen können. <IMAGE>

IPC 1-7 (main, further and additional classification)

F04B 1/04; F02M 63/02

IPC 8 full level (invention and additional information)

F04B 1/04 (2006.01)

CPC (invention and additional information)

F04B 1/0413 (2013.01)

Designated contracting state (EPC)

DE FR GB IT

EPO simple patent family

EP 1101939 A2 20010523; EP 1101939 A3 20030108; EP 1101939 B1 20041006; DE 19955778 A1 20010613

INPADOC legal status


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