DE749782C

DE749782C - High pressure plunger pump

Info

Publication number: DE749782C
Application number: DEST60785D
Authority: DE
Inventors: Dipl-Ing Hinrich Stuelcken
Original assignee: HINRICH STUELCKEN DIPL ING
Current assignee: HINRICH STUELCKEN DIPL ING
Priority date: 1941-05-30
Filing date: 1941-05-30
Publication date: 1944-12-05

Description

Es sind Flüssigkeitspumpen bekannt, bei denen zwecks Änderung der Förderleistung durch Hubänderung zwischen der antreibenden Pleuelstange und dem angetriebenen S Plunger.eine Kulisse oder ein Übertragungshebel mit verschiebbarem Drehpunkt -angeordnet ist, wobei dann durch Verlagerung des Drehpunktes oder -Verschiebung der Kulisse der Hub des Plungers änderbar ist.There are known liquid pumps in which to change the delivery rate by changing the stroke between the driving connecting rod and the driven S plunger is, in which case the stroke of the plunger can be changed by shifting the pivot point or shifting the link.

Diese bekannten Ausführungen haben einen ortsfest angeordneten Zylinder und beweglichen Plunger und eignen sich nicht für hohe Arbeitsdrücke und für hohe Drehzahlen.
Es ist auch eine solche Pumpenausführung bekannt, die an sich für hohe Drücke und Drehzahlen geeignet ist, bei welcher jedoch das bewegliche Auflager, welches den Drehpunkt des Übertragungshebels bildet, an letzterem so angreift, daß auf den Plunger, besonders bei der Einstellung auf kleine Höhe, starke schädliche Seitenkräfte ausgeübt werden. Auch muß bei dieser Ausführung die Kurbelwelle den vollen Plungerdruck aufnehmen. These known designs have a stationary cylinder and movable plunger and are not suitable for high working pressures and for high speeds.
Such a pump design is also known which is suitable per se for high pressures and speeds, but in which the movable support, which forms the fulcrum of the transmission lever, engages the latter in such a way that on the plunger, especially when it is set to a small height , strong harmful side forces are exerted. In this design, too, the crankshaft must absorb the full plunger pressure.

Ferner ist eine Pumpenausführung bekannt, bei welcher der Bewegungsbereich des Plungers vor- und rückverlegt werden kann, wobei durch früheres oder späteres Überdecken der Saugöffnung eine Änderung der Förderleistung bewirkt wird.Furthermore, a pump design is known in which the range of motion of the plunger can be moved forwards and backwards, with if the suction opening is covered earlier or later, a change in the delivery rate is effected.

Gegenstand der Erfindung ist eine hydraulische Preßpumpe mit durch Hubregelung änderbarer Förderleistung für hohe Drücke, die insbesondere auch für den Betrieb mit hohen Drehzahlen geeignet -ist, deren Plunger aber ortsfest angeordnet und deren Zylinder beweglich ist, wodurch sich ein besonders gutes Arbeiten des im beweglichen Pumpenteil' angeordneten Saugventils ergibt. Erfindungsgemäß erfolgt der Antrieb des bewegliehen Zylinders durch einen angelenkten Hebel, der ihn rahmenartig umfaßt und der seinerseits an einem Ende von der Kurbelwelle angetrieben wird, während sein anderes Ende sich auf zwei "^seitlich verschiebbare Auflager stützt, wobei in der Mittellage der Kurbelwelle die Berührungslinie der Auflagerrollen mit dem Hebel und die Mittellinie der Zapfen, mit welchen der Hebel am Zylinder angelenkt ist, in einer Ebene liegen, die senkrecht zur Zylinderachse liegt.The invention relates to a hydraulic press pump with stroke control changeable delivery rate for high pressures, especially for the operation with high speeds -is suitable, but the plunger is fixed and the cylinder is movable, which means that the moving part of the pump works particularly well. arranged suction valve results. According to the invention, the drive of the movable takes place Cylinder by an articulated lever which surrounds it like a frame and which in turn is at one end of the crankshaft is driven, while its other end is laterally displaceable on two "^ Support supports, with the contact line of the support rollers in the central position of the crankshaft lie in one plane with the lever and the center line of the pins with which the lever is hinged to the cylinder, which is perpendicular to the cylinder axis.

Durch diesen Antrieb wird lediglich der Druckhub ausgeübt, während der Saughub durch eine außerhalb des Getrieberaumes an-This drive only exerts the pressure stroke during the suction stroke by an outside of the gear compartment

Claims

orderly pen is effected which every possible compensates for dead gear in the pivot points.

This design reduces the harmful effects Side pressure on the plunger to a minimum, only loads the crankshaft

"half the plunger pressure and is suitable for high pressures and speeds.

Of the figures, Fig. Ι shows a section along line CD in Fig.

2, Fig. 2 is a section along line AB of Fig. Ι; the figures show a single-cylinder pump for the sake of simplicity; the device can of course also be used for pumps with several plungers.

The pump body to which the pierced plunger 2 is attached is denoted by ι is. The cylinder 3 slides on the latter; 4 denotes the pressure valve and 5 the im Cylinder arranged suction valve. The cylinder is provided with two lateral pins 6, which are enclosed by eyes 7 which are connected to the frame-like lever 8 are. This lever carries the crank pin 9 at one end, which through the connecting rod 10 receives its drive from the crankshaft 11. The other end of the lever is supported on the supports 12, which are rotatable about pins 13. The pins 13 are in the slidable Frame 14 is attached, which in turn is movable on ball bearings 15. The frame 14 can be moved, for example, by means of a threaded spindle 16, however, equivalent means can of course also be used. The movement can be done manually, internally, pneumatically or electrically.

The entry of the pressure fluid takes place through the bore 17 into the interior of the housing, the exit through the bore 18. The cylinder 3 carries two at the top Push rods 19, which are supported on a spring plate 20. The suction stroke is effected by the spring 21 through the intermediary of the mentioned spring plate 20 and the push rods 19. The upper end of the spring is supported against the bottom of the closure cap 22.

The mode of action results from the preceding as follows: If the Support rollers 12 are in the position shown, the stroke of the cylinder is about half of the crank stroke. Now the sliding frame 14 in the drawing moved to the right, this reduces the stroke of the cylinder and reaches the value zero if the point of support of the lever on the support rollers is aligned with the axis the pin 6 in Fig. 2 covers.

Ρλ τ entanspruc η:

High pressure plunger pump with fixed, pierced plunger and movable cylinder, characterized in that for the purpose of changing the stroke with high-speed press pumps Valve control and high pressure and thus the delivery rate of the drive means a lever that is hinged to the cylinder and encompasses it in a frame-like manner takes place at one end of the crankshaft is driven, while the other end rests on two lateral supports that can be moved up to the middle of the cylinder, and that the axis of the pin (6) and the lines of contact of the rollers (12) with the lever in the central position of the cylinder in a plane perpendicular to its axis.

To differentiate the subject matter of the application from the state of the art are in the granting procedure the following publications have been considered:

German Patent No. 6oö 413;

British Patent Specification No. 13,920/1910, 305 829, 489 756.

1 sheet of drawings

BP.RMN. CJ-DIiITCKT IN riFIt