DE20114020U1 - Bi-directional hydraulic pump with spindle drive - Google Patents
Bi-directional hydraulic pump with spindle driveInfo
- Publication number
- DE20114020U1 DE20114020U1 DE20114020U DE20114020U DE20114020U1 DE 20114020 U1 DE20114020 U1 DE 20114020U1 DE 20114020 U DE20114020 U DE 20114020U DE 20114020 U DE20114020 U DE 20114020U DE 20114020 U1 DE20114020 U1 DE 20114020U1
- Authority
- DE
- Germany
- Prior art keywords
- hydraulic pump
- piston rod
- bidirectional hydraulic
- pump according
- cylinder
- 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 - Lifetime
Links
- 230000002457 bidirectional effect Effects 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims 1
- 239000012530 fluid Substances 0.000 claims 1
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
-
- 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
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
- F04B9/025—Driving of pistons coacting within one cylinder
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Reciprocating Pumps (AREA)
Description
OM Pumpe Spindelantrieb dasOM pump spindle drive the
Beschreibung:Description:
Marktübliche Hydraulikpumpen wirken unidirektional, das heißt, Ansaug- und Druckanschluss liegen konstruktionsbedingt fest. Für die meisten praktischen Anwendungen ist dies unerheblich. Symmetrische Konstruktionen wie beispielsweise geradverzahnte Zahnradpumpen lassen sich zwar konstruktiv so ausfuhren, dass Ansaug- und Druckanschluss gleichwertig sind, die Pumpe also bidirektional genutzt werden kann, jedoch hat dieses Konstruktionsprinzip den Nachteil, dass beim Betrieb starke Pulsationen im Öldruck auftreten, was für viele Anwendungen nicht hinzunehmen ist. Schrägverzahnte Spindelpumpen arbeiten zwar weitgehend pulsationsfrei, wegen der großen in Axialrichtung wirkenden Kräfte ist eine symmetrische Konstruktion jedoch kaum zu verwirklichen.Commercially available hydraulic pumps work unidirectionally, which means that the suction and pressure connections are fixed by design. For most practical applications, this is irrelevant. Symmetrical designs such as straight-toothed gear pumps can be designed so that the suction and pressure connections are equivalent, meaning that the pump can be used bidirectionally. However, this design principle has the disadvantage that strong pulsations in the oil pressure occur during operation, which is unacceptable for many applications. Helical-toothed spindle pumps work largely pulsation-free, but due to the large forces acting in the axial direction, a symmetrical design is hardly feasible.
Aufgabenstellung und Zweck der Erfindung ist es, eine kostengünstige Hydraulikpumpe zu schaffen, die einen praktisch pulsationsfreien Betrieb erlaubt und darüber hinaus in beiden Richtungen im Vierquadrantenbetrieb arbeiten kann. In Verbindung mit Synchron- oder Asynchronmotor und elektronischem Leistungssteiler oder Frequenzumrichter steht damit ein einfaches Stellmittel für hydraulische Aktorsysteme zur Verfügung, wie es beispielsweise für hydraulisch betriebene Personenaufzüge mit Lastausgleich anwendbar ist.The task and purpose of the invention is to create a cost-effective hydraulic pump that allows practically pulsation-free operation and can also work in both directions in four-quadrant operation. In conjunction with a synchronous or asynchronous motor and an electronic power divider or frequency converter, this provides a simple actuating means for hydraulic actuator systems, such as can be used for hydraulically operated passenger elevators with load compensation.
Die Aufgabenstellung wird erfindungsgemäß gelöst, indem ein doppelt wirkender Hydraulikzylinder (I) mit einem Spindeltrieb bestehend aus Motor mit Kupplung (11), Spindel (4) und Mutter (3) gekoppelt wird. Die an der Kolbenstange (2) auftretenden Drehmomente werden beispielsweise über die Mutterbefestigung (5) mit Führungsschienen (6) und Gleit- oder Rollenschuhen (7) abgefangen. Eine besonders vorteilhafte Ausführung entsteht dadurch, dass die Kolbenstange (2) als durchgehendes Rohr ausgeführt wird. Wenn die Außendurchmesser beider Kolbenstangenhälften gleich sind, dann wird auf der jeweiligen Druckseite (8 oder 9) die gleiche Ölmenge abgegeben, wie auf der Saugseite (9 oder 8) aufgenommen wird. Im Gegensatz zu konventionellen Pumpensystemen ist daher nur ein sehr kleines Reservoir für die Ölmengen erforderlich, die durch Leckage verloren gehen. Die Hydraulikanschlüsse (10) können beispielsweise in konventioneller Weise realisiert werden.The problem is solved according to the invention by coupling a double-acting hydraulic cylinder (I) with a spindle drive consisting of a motor with coupling (11), spindle (4) and nut (3). The torques occurring on the piston rod (2) are absorbed, for example, via the nut fastening (5) with guide rails (6) and sliding or roller shoes (7). A particularly advantageous design is created by designing the piston rod (2) as a continuous tube. If the outside diameters of both piston rod halves are the same, the same amount of oil is released on the respective pressure side (8 or 9) as is taken in on the suction side (9 or 8). In contrast to conventional pump systems, only a very small reservoir is therefore required for the amounts of oil lost through leakage. The hydraulic connections (10) can, for example, be implemented in a conventional manner.
Durch die unvermeidlichen Fertigungstoleranzen sowie unsymmetrische Ölverluste an den Dichtlippen verschieben sich zwangsläufig Geber- und Nehmerwege gegeneinander im Laufe der Zeit. Mit Hilfe von Wegsensoren am Geber- oder Nehmersystem sowie gesteuerten oder passiven Bypassventilen wird der Gleichlauf von Geber- und Nehmersystem wieder hergestellt.Due to the unavoidable manufacturing tolerances and asymmetrical oil losses at the sealing lips, the master and slave travels inevitably shift relative to each other over time. With the help of travel sensors on the master or slave system as well as controlled or passive bypass valves, the synchronization of the master and slave systems is restored.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20114020U DE20114020U1 (en) | 2001-08-24 | 2001-08-24 | Bi-directional hydraulic pump with spindle drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20114020U DE20114020U1 (en) | 2001-08-24 | 2001-08-24 | Bi-directional hydraulic pump with spindle drive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE20114020U1 true DE20114020U1 (en) | 2002-03-14 |
Family
ID=7960901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE20114020U Expired - Lifetime DE20114020U1 (en) | 2001-08-24 | 2001-08-24 | Bi-directional hydraulic pump with spindle drive |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE20114020U1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20311033U1 (en) * | 2003-07-17 | 2004-11-25 | Cooper Cameron Corp., Houston | pumping device |
-
2001
- 2001-08-24 DE DE20114020U patent/DE20114020U1/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20311033U1 (en) * | 2003-07-17 | 2004-11-25 | Cooper Cameron Corp., Houston | pumping device |
| GB2419645B (en) * | 2003-07-17 | 2008-07-02 | Cooper Cameron Corp | Pump device for the hydraulic actuation of a valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R086 | Non-binding declaration of licensing interest | ||
| R207 | Utility model specification |
Effective date: 20020418 |
|
| R156 | Lapse of ip right after 3 years |
Effective date: 20050301 |