CH258404A - Hydraulic control device on multiple piston pumps. - Google Patents
Hydraulic control device on multiple piston pumps.Info
- Publication number
- CH258404A CH258404A CH258404DA CH258404A CH 258404 A CH258404 A CH 258404A CH 258404D A CH258404D A CH 258404DA CH 258404 A CH258404 A CH 258404A
- Authority
- CH
- Switzerland
- Prior art keywords
- control device
- pumps
- hydraulic control
- piston
- pressure
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
- F04B49/24—Bypassing
- F04B49/243—Bypassing by keeping open the inlet valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/007—Installations or systems with two or more pumps or pump cylinders, wherein the flow-path through the stages can be changed, e.g. from series to parallel
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Description
Hydraulische Regeleinrichtung an Mehrfach-Kolbenpumpen. Die vorliegende Erfindung betrifft eine hy draulische Regeleinrichtung an Mehrfach- Kolbenpumpen zur Veränderung der Förder menge in der Weise, dass bei steigender Druckhöhe die Wirkung einzelner Kolben automatisch nacheinander ausgeschaltet wird, wobei der Flüssigkeitsdruck als Steuer impuls dient.
Die fortschreitende Entwicklung im mo dernen Maschinenbau mit seiner steigenden Anwendung hydraulischer Hilfsapparate bringt es mit sieh, dass man der Wirtschaft lichkeit solcher Einrichtungen mehr und mehr grössere Aufmerksamkeit schenken muss. In der Regel ist es so, dass man im Verlaufe eines längeren Arbeitsganges erst eine grosse Fördermenge und geringen Druck und dann eine kleine Fördermenge und hohen Druck braucht. Eine Pumpe, welche man für das Maximum der im Betriebe auftretenden Fördermenge bei Höchstdruck bauen würde, wäre unrationell, weil die nötige Antriebs leistung dadurch viel zuggross wäre. Die Er findung weist den Weg zu einer wirtschaft lichen Pumpenanlage.
Die Zeichnung zeigt ein Ausführungsbei spiel der Erfindung. Fig. I ist ein Vertikal schnitt in Längsrichtung einer Kolbenachse. Fig. II ist der Grundriss einer vierfachen Kolbenpumpe.
In Fig. I sind Pumpengehäuse 1, Flüs- sigkeitshehälter 2, Pumpenzylinder 3, Pum penkolben 4, Druckventil 5 und Saugventil 6 auf bekannte Artausgeführt. Ferner ist eine Steuervorrichtung, bestehend aus dem Stö ssel 7, der Gegenfeder 8, dem Steuerkolben 9 und dem Steuergehäuse 10, vorhanden. Jede der vier parallel geschalteten Pumpen - ver gleiche Fig. II - besitzt eine solche Steuer- vorrichtunig, bei der der Flüssigkeitsdruck auf die freie Stirnfläche des Steuerkolbens 9 einwirkt und diesen Kolben axial gegen die Wirkung der Feder 8 zu schieben sucht.
Die Federspannung der Federn unter sich ist verschieden, so, dass die Axialversehiebung der Steuerkolben im gleichen Masse verschie den ist. Wie aus Fig. I ersichtlich ist, lüftet ,der Stössel 7 das Sau, >entil der Pumpe, wenn die Axialversehiebung des Steuerkol bens ein gewisses Mass erreicht hat. Damit ist die Förderung dieser Pumpe ausgeschaltet. Die Einstellung der Federspannungen kann z.
B. so sein, dass die erste Pumpe 12 bei 10 a;tü, die zweite, 13, bei 20 atü, die dritte, 14, bei 30 atü und schliesslich .die letzte, 15, bei 40 atü ausser Förderung gesetzt wird. Sinkt dann der Flüssigkeitsdruck, s ;o schal ten sich alle Pumpen: - in umgekehrter Rei henfolge - automatisch wieder ein.
Die einzelnen Pumpenkolben können un ter sich verschiedenen Durchmesser haben und dadurch dem jeweiligen Bedarf an För dermenge und Druck angepasst sein.
Die Erfindung sichert eine zuverlässige und vollständig automatische Steuerung je nach Betriebserfordernis. Durch das Ab schalten einzelner Kolben wird die Antriebs leistung reduziert,
Hydraulic control device on multiple piston pumps. The present invention relates to a hy draulic control device on multiple piston pumps to change the delivery amount in such a way that when the pressure level increases, the action of individual pistons is automatically switched off one after the other, the liquid pressure serving as a control pulse.
The progressive development in modern mechanical engineering with its increasing use of hydraulic auxiliary equipment means that more and more attention must be paid to the economic viability of such facilities. As a rule it is the case that in the course of a longer work step you first need a large flow rate and low pressure and then a small flow rate and high pressure. A pump that would be built for the maximum flow rate occurring in the company at maximum pressure would be inefficient, because the necessary drive power would be much larger than that. The invention points the way to an economical pumping system.
The drawing shows a Ausführungsbei game of the invention. Fig. I is a vertical section in the longitudinal direction of a piston axis. Figure II is the plan of a quadruple piston pump.
In FIG. 1, the pump housing 1, liquid container 2, pump cylinder 3, pump piston 4, pressure valve 5 and suction valve 6 are designed in a known manner. Furthermore, a control device consisting of the plunger 7, the counter spring 8, the control piston 9 and the control housing 10 is present. Each of the four pumps connected in parallel - similar to FIG. II - has such a control device in which the fluid pressure acts on the free end face of the control piston 9 and tries to push this piston axially against the action of the spring 8.
The spring tension of the springs among themselves is different, so that the axial displacement of the control piston is different to the same extent. As can be seen from Fig. I, the plunger 7 lifts the sow,> entil the pump when the axial displacement of the control piston has reached a certain level. This switches off the delivery of this pump. The setting of the spring tensions can, for.
B. be so that the first pump 12 at 10 a; tü, the second, 13, at 20 atm, the third, 14, at 30 atm and finally .the last, 15, at 40 atm is put out of delivery. If the fluid pressure then sinks, all pumps switch on again: - in reverse order - automatically.
The individual pump pistons can have different diameters and thus be adapted to the respective demand for delivery and pressure.
The invention ensures reliable and fully automatic control depending on the operating requirements. By switching off individual pistons, the drive power is reduced,
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH258404T | 1945-11-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH258404A true CH258404A (en) | 1948-11-30 |
Family
ID=4472620
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH258404D CH258404A (en) | 1945-11-22 | 1945-11-22 | Hydraulic control device on multiple piston pumps. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH258404A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE961056C (en) * | 1954-12-07 | 1957-03-28 | Felix Leber | Piston pump for the production of pressure oil |
DE1104340B (en) * | 1953-10-26 | 1961-04-06 | Jean Louis Gratzmuller | Pressure control device for hydraulic piston pumps |
DE1107094B (en) * | 1953-05-28 | 1961-05-18 | Elisabeth Zoeller Geb Kehl | Hydraulic tilting device powered by compressed air |
FR2447474A1 (en) * | 1979-01-26 | 1980-08-22 | Pellenc & Motte | Self-regulating pressure control for hydraulic pump - uses excessive rise in delivery pressure to hold inlet valve open |
DE3028396A1 (en) * | 1980-07-26 | 1982-02-11 | Wepuko-Hydraulik GmbH & Co Pumpen- und Kompressorenfabrik, 7418 Metzingen | High pressure reciprocating pump - has inlet valves held open to give simple throughput control |
DE3026253A1 (en) * | 1980-07-11 | 1982-02-18 | Wabco Fahrzeugbremsen Gmbh, 3000 Hannover | Reciprocating piston type hydraulic pump - has unloading plunger operated by discharge pressure to limit working pressure |
AT394892B (en) * | 1989-09-18 | 1992-07-10 | Tech Hydraulikgeraete Ges M B | RADIAL PISTON PUMP |
DE10153189A1 (en) * | 2001-10-27 | 2003-05-15 | Bosch Gmbh Robert | Fuel pump, fuel system, method for operating a fuel system and internal combustion engine |
-
1945
- 1945-11-22 CH CH258404D patent/CH258404A/en unknown
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1107094B (en) * | 1953-05-28 | 1961-05-18 | Elisabeth Zoeller Geb Kehl | Hydraulic tilting device powered by compressed air |
DE1104340B (en) * | 1953-10-26 | 1961-04-06 | Jean Louis Gratzmuller | Pressure control device for hydraulic piston pumps |
DE961056C (en) * | 1954-12-07 | 1957-03-28 | Felix Leber | Piston pump for the production of pressure oil |
FR2447474A1 (en) * | 1979-01-26 | 1980-08-22 | Pellenc & Motte | Self-regulating pressure control for hydraulic pump - uses excessive rise in delivery pressure to hold inlet valve open |
DE3026253A1 (en) * | 1980-07-11 | 1982-02-18 | Wabco Fahrzeugbremsen Gmbh, 3000 Hannover | Reciprocating piston type hydraulic pump - has unloading plunger operated by discharge pressure to limit working pressure |
DE3028396A1 (en) * | 1980-07-26 | 1982-02-11 | Wepuko-Hydraulik GmbH & Co Pumpen- und Kompressorenfabrik, 7418 Metzingen | High pressure reciprocating pump - has inlet valves held open to give simple throughput control |
AT394892B (en) * | 1989-09-18 | 1992-07-10 | Tech Hydraulikgeraete Ges M B | RADIAL PISTON PUMP |
DE10153189A1 (en) * | 2001-10-27 | 2003-05-15 | Bosch Gmbh Robert | Fuel pump, fuel system, method for operating a fuel system and internal combustion engine |
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