EP1413772A1 - Low noise hydraulic power unit - Google Patents

Low noise hydraulic power unit Download PDF

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Publication number
EP1413772A1
EP1413772A1 EP03021586A EP03021586A EP1413772A1 EP 1413772 A1 EP1413772 A1 EP 1413772A1 EP 03021586 A EP03021586 A EP 03021586A EP 03021586 A EP03021586 A EP 03021586A EP 1413772 A1 EP1413772 A1 EP 1413772A1
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EP
European Patent Office
Prior art keywords
frame
motor
reservoir
hydraulic unit
pump
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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.)
Granted
Application number
EP03021586A
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German (de)
French (fr)
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EP1413772B1 (en
Inventor
Alfons Herr
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Bosch Rexroth AG
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Bosch Rexroth AG
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Publication of EP1413772A1 publication Critical patent/EP1413772A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/008—Reduction of noise or vibration
    • 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
    • F04B23/00—Pumping installations or systems
    • F04B23/02—Pumping installations or systems having reservoirs
    • F04B23/025—Pumping installations or systems having reservoirs the pump being located directly adjacent the reservoir
    • 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
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/06—Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/001—Noise damping
    • F04B53/002—Noise damping by encapsulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/26—Supply reservoir or sump assemblies

Definitions

  • the invention relates to a low-noise hydraulic unit, which is designed in the manner of a cuboidal frame closed on all sides, according to the preamble of claim 1.
  • a reservoir for hydraulic pressure medium in a U-shape encloses from three sides a motor-pump group, which is formed from an air-cooled electric motor and a pump driven by this.
  • the reservoir thereby forms three side walls of a cuboid frame whose bottom is formed by a base plate.
  • the frame is laterally closed by a first insulating wall, which is arranged between the legs of the reservoir so that it forms the fourth side wall of the cuboid frame.
  • a second insulating wall which rests on the reservoir and forms the ceiling of the frame.
  • the motor-pump group is arranged horizontally in a receiving space, which is enclosed by the base plate, three side walls formed by the reservoir and two Dämmcommunn.
  • the motor-pump group is held on the base plate of the frame via vibration dampers.
  • This structural design of the hydraulic unit allows a very good noise attenuation.
  • the lateral Dämmwand and also designed as insulating wall ceiling can be easily inserted into the frame and solve when needed again from the frame. This not only facilitates the assembly of the individual components inside the frame in the production of the hydraulic unit but also allows a good accessibility of the individual components, eg. For maintenance or repairs.
  • the invention has for its object to provide a hydraulic unit of the type mentioned above, which allows an increase in the number of motor-pump groups without having to increase the individual Dämmread corresponding to the base of the hydraulic unit.
  • a symmetrical design results when the motor-pump groups are evenly distributed to the two receiving spaces. If the motor-pump groups are arranged side by side in the receiving spaces such that the pumps face the transverse wall, particularly short suction lines can be realized.
  • FIG. 1 shows a horizontal section through a hydraulic unit designed according to the invention, which is guided along the line labeled C - D in FIG.
  • FIG. 2 shows a vertical section through the hydraulic unit, which is guided along the line A - B in FIG. Since FIGS. 1 and 2 complement each other in their illustration of the hydraulic unit, the following description relates both to FIG. 1 and FIG. 2.
  • the hydraulic unit has the shape of a cuboid frame 10 closed on all sides.
  • the bottom of the frame 10 forms a base plate 11 which is formed of two nested and welded together wells 11u and 11o. While the lower tray 11u rests on a foundation 12, an H-shaped reservoir 13 for receiving hydraulic fluid is held on the upper tray 11o.
  • the trough 11o forms the bottom of the reservoir 13.
  • Two sections 13a and 13b of the reservoir 13 form a first side wall of the frame 10.
  • Two further sections 13c and 13d of the reservoir 13 form a second side wall of the frame 10.
  • the two side walls of the frame 10 are connected by a transverse wall 13e.
  • a first lateral insulating wall 15 is arranged, which forms a further side wall of the frame 10.
  • the insulating wall 15 is located at two vertically arranged angle sections 16, 17 and two horizontally arranged angle sections 18, 19 at.
  • a second lateral insulating wall 20 is arranged, which forms the fourth side wall of the frame 10.
  • the insulating wall 20 is located at two vertically arranged angle sections 21, 22 and at two horizontally arranged angle sections 23, 24 at.
  • the section 13a, the transverse wall 13e, the section 13c and the insulating wall 15 enclose a first receiving space 25, which is closed at the bottom by the base plate 11 and upwards by an insulating wall 28.
  • the insulating wall 28 rests on the angled section 18, on an angle section 29 held on the section 13a, on an angle section 30 held on the transverse wall 13e, and on a further angular profile not visible in FIGS. 1 and 2, which is held on the section 13c
  • the section 13b, the transverse wall 13e, the section 13d and the insulating wall 20 enclose a second receiving space 32 which is closed at the bottom by the base plate 11 and at the top by a further insulating wall 33.
  • the insulating wall 33 rests on the angle profile 24, on an angle section 35 held on the section 13b, on an angle section 36 held on the transverse wall 13e, and on a further angle profile, not visible in FIGS. 1 and 2, which is held on the section 13d. on.
  • Each of the motor-pump groups has an electric motor M, which drives two hydraulic pumps P1 and P2 respectively.
  • the electric motor M is attached to a motor support T, which in turn via damping elements D to the upper tray 11o of the base plate 11 is held.
  • the motor-pump groups 40 to 42 are arranged horizontally.
  • the pumps P1 and P2 face the transverse wall 13e. From the pump P1, a suction line S1 leads into the transverse wall 13e of the reservoir 13 for the hydraulic pressure medium. In the same way leads from the pump P2, a suction line S2 in the transverse wall 13e. This measure makes it possible to keep the suction lines S1 and S2 of the pumps P1 and P2 short.
  • three further motor-pump groups 44, 45, 46 are arranged side by side.
  • the motor-pump groups 44 to 46 also have an electric motor M which drives two hydraulic pumps P1 and P2 held on it.
  • the pumps P1 and P2 of the motor-pump groups 44 to 46 face the transverse wall 13e, wherein in each case one suction line S1 or S2 into the transverse wall of the pumps P1 and P2 13e of the reservoir 13 for the hydraulic pressure medium leads.
  • the insulating walls need 15, 20, 28 and 33 in a reservoir with H-shaped cross-section according to The invention in each case only one of the receiving spaces 25 and 32 to close.
  • the inventive design of the reservoir 13 therefore allows Dämmread that have smaller dimensions than is the case in the prior art.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Valve Device For Special Equipments (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

A low-noise hydraulic system is installed within a rectangular frame (10) on a base plate (11) which also forms the base of a hydraulic reservoir (13). The reservoir forms at least two of the frame sidewalls. The other sidewalls are noise-insulating sidewalls (20, 33). The unit also encloses several groups of pumps (40, 41, 42) fixed to the base-plate. The reservoir forms two sidewall (13a, 13b; 13c, 13d) sections of the frame. One transverse sidewall (13e) links the two sidewalls to form an H-shaped group. The motor pump groups are located within two compartments.

Description

Die Erfindung betrifft ein geräuscharmes Hydraulikaggregat, das in der Art eines allseitig geschlossenen quaderförmigen Rahmens ausgebildet ist, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a low-noise hydraulic unit, which is designed in the manner of a cuboidal frame closed on all sides, according to the preamble of claim 1.

Ein derartiges Hydraulikaggregat ist aus der Zeitschrift "Technische Rundschau", 2001, Nr. 6, Seiten 34 und 35, insbesondere Bild 2 und die zugehörige Beschreibung, bekannt. Ein Vorratsbehälter für hydraulisches Druckmittel in U-Form umschließt von drei Seiten eine Motor-Pumpe-Gruppe, die aus einem luftgekühlten Elektromotor und einer von diesem angetriebenen Pumpe gebildet ist. Der Vorratsbehälter bildet dabei drei Seitenwände eines quaderförmigen Rahmens, dessen Boden von einer Grundplatte gebildet ist. Der Rahmen ist seitlich durch eine erste Dämmwand abgeschlossen, die so zwischen den Schenkeln des Vorratsbehälters angeordnet ist, daß sie die vierte Seitenwand des quaderförmigen Rahmens bildet. Nach oben ist der quaderförmige Rahmen durch eine zweite Dämmwand abgeschlossen, die auf dem Vorratsbehälter aufliegt und die Decke des Rahmens bildet. Die Motor-Pumpe-Gruppe ist waagerecht liegend in einem Aufnahmeraum angeordnet, der von der Grundplatte, drei von dem Vorratsbehälter gebildeten Seitenwänden sowie zwei Dämmwänden umschlossen ist. Die Motor-Pumpe-Gruppe ist über Schwingungsdämpfer an der Grundplatte des Rahmens gehalten. Diese konstruktive Ausgestaltung des Hydraulikaggregats ermöglicht eine sehr gute Geräuschdämpfung. Die seitliche Dämmwand und die ebenfalls als Dämmwand ausgebildete Decke lassen sich leicht in den Rahmen einsetzen und bei Bedarf wieder von dem Rahmen lösen. Dies erleichtert nicht nur bei der Fertigung des Hydraulikaggregats die Montage der einzelnen Komponenten im Inneren des Rahmens sondern erlaubt auch später eine gute Zugänglichkeit der einzelnen Komponenten, z. B. für Wartungsarbeiten oder Reparaturen.Such a hydraulic unit is known from the magazine "Technical Review", 2001, No. 6, pages 34 and 35, in particular Figure 2 and the associated description. A reservoir for hydraulic pressure medium in a U-shape encloses from three sides a motor-pump group, which is formed from an air-cooled electric motor and a pump driven by this. The reservoir thereby forms three side walls of a cuboid frame whose bottom is formed by a base plate. The frame is laterally closed by a first insulating wall, which is arranged between the legs of the reservoir so that it forms the fourth side wall of the cuboid frame. At the top of the cuboid frame is completed by a second insulating wall, which rests on the reservoir and forms the ceiling of the frame. The motor-pump group is arranged horizontally in a receiving space, which is enclosed by the base plate, three side walls formed by the reservoir and two Dämmwänden. The motor-pump group is held on the base plate of the frame via vibration dampers. This structural design of the hydraulic unit allows a very good noise attenuation. The lateral Dämmwand and also designed as insulating wall ceiling can be easily inserted into the frame and solve when needed again from the frame. This not only facilitates the assembly of the individual components inside the frame in the production of the hydraulic unit but also allows a good accessibility of the individual components, eg. For maintenance or repairs.

Diese Hydraulikaggregate wurden in der Weise weiter entwikkelt, daß in dem Aufnahmeraum mehrere Motor-Pumpe-Gruppen nebeneinander angeordnet sind. Derartige Konstruktionen benötigen eine größere Grundfläche als Hydraulikaggregate mit nur einer Motor-Pumpe-Gruppe. Dies führt zu einer entsprechenden Vergrößerung der Fläche der seitlichen Dämmwand und der oberen Dämmwand. Damit sich die Dämmwände nicht durchbiegen, sind zusätzliche konstruktive Maßnahmen, wie eine Verstärkung der Dämmwände oder zusätzliche Abstützungen erforderlich. Diese Maßnahmen führen, insbesondere im Fall der oberen Dämmwand, zu einer Erhöhung ihres Gewichts und/oder im Fall von zusätzlichen Abstützungen zu einer Verschlechterung der Zugänglichkeit des Aufnahmeraums bei der Montage, Wartung und Reparatur.These hydraulic units have been further developed in such a way that several motor-pump groups are arranged side by side in the receiving space. Such constructions require a larger footprint than hydraulic units with only one motor-pump group. This leads to a corresponding increase in the area of the lateral insulating wall and the upper insulating wall. So that the insulating walls do not bend, additional structural measures, such as a reinforcement of the insulating walls or additional supports are required. These measures lead, especially in the case of the upper insulating wall, to an increase in their weight and / or in the case of additional supports to a deterioration in the accessibility of the receiving space during assembly, maintenance and repair.

Der Erfindung liegt die Aufgabe zugrunde, ein Hydraulikaggregat der eingangs genannten Art zu schaffen, das eine Erhöhung der Anzahl der Motor-Pumpe-Gruppen erlaubt, ohne die einzelnen Dämmwände entsprechend der Grundfläche des Hydraulikaggregats vergrößern zu müssen.The invention has for its object to provide a hydraulic unit of the type mentioned above, which allows an increase in the number of motor-pump groups without having to increase the individual Dämmwände corresponding to the base of the hydraulic unit.

Diese Aufgabe wird durch die im Anspruch 1 gekennzeichneten Merkmale gelöst. Die Unterteilung des Rahmens in zwei getrennte Aufnahmeräume erlaubt es, für die obere Wand des Rahmens des Hydraulikaggregats Dämmplatten zu verwenden, deren Fläche kleiner als die gesamte Grundfläche des Hydraulikaggregats ist. In gleicher Weise können für die den Rahmen seitlich abschließende Wand Dämmplatten verwendet werden, deren Breite kleiner als die gesamte Länge der Grundplatte ist. Die Verbindung der Seitenwände des Vorratsbehälters durch die Querwand erlaubt darüber hinaus eine besonders stabile Konstruktion des Rahmens des Hydraulikaggregats, ohne daß die Zugänglichkeit der Aufnahmeräume behindernde zusätzliche Abstützungen erforderlich sind.This object is achieved by the features characterized in claim 1. The subdivision of the frame into two separate receiving spaces makes it possible to use for the upper wall of the frame of the hydraulic unit insulation boards whose area is smaller than the entire base of the hydraulic unit. In the same way can be used for the frame laterally final wall insulating panels whose width is smaller than the entire length of the base plate. The connection of the side walls of the reservoir through the transverse wall also allows a particularly stable construction of the frame of the hydraulic unit, without the accessibility of the receiving spaces obstructing additional supports are required.

Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet. Ein symmetrischer Aufbau ergibt sich, wenn die Motor-Pumpe-Gruppen gleichmäßig auf die beiden Aufnahmeräume verteilt sind. Wenn die Motor-Pumpe-Gruppen in den Aufnahmeräumen derart nebeneinander liegend angeordnet sind, daß die Pumpen der Querwand zugewandt sind, lassen sich besonders kurze Saugleitungen realisieren.Advantageous developments of the invention are characterized in the subclaims. A symmetrical design results when the motor-pump groups are evenly distributed to the two receiving spaces. If the motor-pump groups are arranged side by side in the receiving spaces such that the pumps face the transverse wall, particularly short suction lines can be realized.

Die Erfindung wird im folgenden mit ihren weiteren Einzelheiten anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels näher erläutert. Es zeigen

Figur 1
einen waagerechten Schnitt durch ein erfindungsgemäß ausgebildetes Hydraulikaggregat und
Figur 2
einen senkrechten Schnitt durch das in der Figur 1 dargestellte Hydraulikaggregat.
The invention will be explained in more detail below with its further details with reference to an embodiment shown in the drawings. Show it
FIG. 1
a horizontal section through an inventively designed hydraulic unit and
FIG. 2
a vertical section through the hydraulic unit shown in the figure 1.

Die Figur 1 zeigt einen waagerechten Schnitt durch ein erfindungsgemäß ausgebildetes Hydraulikaggregat, der entlang der in der Figur 2 mit C - D bezeichneten Linie geführt ist. Die Figur 2 zeigt einen senkrechten Schnitt durch das Hydraulikaggregat, der entlang der in der Figur 1 mit A - B bezeichneten Linie geführt ist. Da sich die Figuren 1 und 2 in ihrer Darstellung des Hydraulikaggregats jeweils ergänzen, bezieht sich die folgende Beschreibung sowohl auf die Figur 1 als auch auf die Figur 2.FIG. 1 shows a horizontal section through a hydraulic unit designed according to the invention, which is guided along the line labeled C - D in FIG. FIG. 2 shows a vertical section through the hydraulic unit, which is guided along the line A - B in FIG. Since FIGS. 1 and 2 complement each other in their illustration of the hydraulic unit, the following description relates both to FIG. 1 and FIG. 2.

Das Hydraulikaggregat weist die Form eines allseitig geschlossenen quaderförmigen Rahmens 10 auf. Den Boden des Rahmens 10 bildet eine Grundplatte 11, die aus zwei ineinander gestellten und miteinander verschweißten Wannen 11u und 11o gebildet ist. Während die untere Wanne 11u auf einem Fundament 12 aufliegt, ist an der oberen Wanne 11o ein H-förmiger Vorratsbehälter 13 für die Aufnahme von Hydraulikflüssigkeit gehalten. Die Wanne 11o bildet den Boden des Vorratsbehälters 13. Zwei Abschnitte 13a und 13b des Vorratsbehälters 13 bilden eine erste Seitenwand des Rahmens 10. Zwei weitere Abschnitte 13c und 13d des Vorratsbehälters 13 bilden eine zweite Seitenwand des Rahmens 10. Die beiden Seitenwände des Rahmens 10 sind durch eine Querwand 13e verbunden. Zwischen den Abschnitten 13a und 13c des Vorratsbehälters 13 ist eine erste seitliche Dämmwand 15 angeordnet, die eine weitere Seitenwand des Rahmens 10 bildet. Die Dämmwand 15 liegt an zwei senkrecht angeordneten Winkelprofilen 16, 17 sowie an zwei waagerecht angeordneten Winkelprofilen 18, 19 an. Zwischen den Abschnitten 13b und 13d des Vorratsbehälters 13 ist eine zweite seitliche Dämmwand 20 angeordnet, die die vierte Seitenwand des Rahmens 10 bildet. Die Dämmwand 20 liegt an zwei senkrecht angeordneten Winkelprofilen 21, 22 sowie an zwei waagerecht angeordneten Winkelprofilen 23, 24 an.The hydraulic unit has the shape of a cuboid frame 10 closed on all sides. The bottom of the frame 10 forms a base plate 11 which is formed of two nested and welded together wells 11u and 11o. While the lower tray 11u rests on a foundation 12, an H-shaped reservoir 13 for receiving hydraulic fluid is held on the upper tray 11o. The trough 11o forms the bottom of the reservoir 13. Two sections 13a and 13b of the reservoir 13 form a first side wall of the frame 10. Two further sections 13c and 13d of the reservoir 13 form a second side wall of the frame 10. The two side walls of the frame 10 are connected by a transverse wall 13e. Between the sections 13 a and 13 c of the reservoir 13, a first lateral insulating wall 15 is arranged, which forms a further side wall of the frame 10. The insulating wall 15 is located at two vertically arranged angle sections 16, 17 and two horizontally arranged angle sections 18, 19 at. Between the sections 13b and 13d of the storage container 13, a second lateral insulating wall 20 is arranged, which forms the fourth side wall of the frame 10. The insulating wall 20 is located at two vertically arranged angle sections 21, 22 and at two horizontally arranged angle sections 23, 24 at.

Der Abschnitt 13a, die Querwand 13e, der Abschnitt 13c und die Dämmwand 15 umschließen einen ersten Aufnahmeraum 25, der nach unten durch die Grundplatte 11 und nach oben durch eine Dämmwand 28 abgeschlossen ist. Die Dämmwand 28 liegt auf dem Winkelprofil 18, auf einem an dem Abschnitt 13a gehaltenen Winkelprofil 29, einem an der Querwand 13e gehaltenen Winkelprofil 30 sowie auf einem in den Figuren 1 und 2 nicht sichtbaren weiteren Winkelprofil, das an dem Abschnitt 13c gehalten ist, auf. Der Abschnitt 13b, die Querwand 13e, der Abschnitt 13d und die Dämmwand 20 umschließen einen zweiten Aufnahmeraum 32, der nach unten durch die Grundplatte 11 und nach oben durch eine weitere Dämmwand 33 abgeschlossen ist. Die Dämmwand 33 liegt auf dem Winkelprofil 24, auf einem an dem Abschnitt 13b gehaltenen Winkelprofil 35, auf einem an der Querwand 13e gehaltenen Winkelprofil 36 sowie auf einem in den Figuren 1 und 2 nicht sichtbaren weiteren Winkelprofil, das an dem Abschnitt 13d gehalten ist, auf.The section 13a, the transverse wall 13e, the section 13c and the insulating wall 15 enclose a first receiving space 25, which is closed at the bottom by the base plate 11 and upwards by an insulating wall 28. The insulating wall 28 rests on the angled section 18, on an angle section 29 held on the section 13a, on an angle section 30 held on the transverse wall 13e, and on a further angular profile not visible in FIGS. 1 and 2, which is held on the section 13c , The section 13b, the transverse wall 13e, the section 13d and the insulating wall 20 enclose a second receiving space 32 which is closed at the bottom by the base plate 11 and at the top by a further insulating wall 33. The insulating wall 33 rests on the angle profile 24, on an angle section 35 held on the section 13b, on an angle section 36 held on the transverse wall 13e, and on a further angle profile, not visible in FIGS. 1 and 2, which is held on the section 13d. on.

In dem Aufnahmeraum 25 sind drei Motor-Pumpe-Gruppen 40, 41, 42 nebeneinander angeordnet. Jede der Motor-Pumpe-Gruppen weist einen Elektromotor M auf, der jeweils zwei Hydropumpen P1 und P2 antreibt. Der Elektromotor M ist an einem Motorträger T befestigt, der seinerseits über Dämpfungselemente D an der oberen Wanne 11o der Grundplatte 11 gehalten ist. Die Motor-Pumpe-Gruppen 40 bis 42 sind liegend angeordnet. Die Pumpen P1 und P2 sind der Querwand 13e zugewandt. Von der Pumpe P1 führt eine Saugleitung S1 in die Querwand 13e des Vorratsbehälters 13 für das hydraulische Druckmittel. In gleicher Weise führt von der Pumpe P2 eine Saugleitung S2 in die Querwand 13e. Diese Maßnahme erlaubt es, die Saugleitungen S1 und S2 der Pumpen P1 bzw. P2 kurz zu halten.In the receiving space 25, three motor-pump groups 40, 41, 42 are arranged side by side. Each of the motor-pump groups has an electric motor M, which drives two hydraulic pumps P1 and P2 respectively. The electric motor M is attached to a motor support T, which in turn via damping elements D to the upper tray 11o of the base plate 11 is held. The motor-pump groups 40 to 42 are arranged horizontally. The pumps P1 and P2 face the transverse wall 13e. From the pump P1, a suction line S1 leads into the transverse wall 13e of the reservoir 13 for the hydraulic pressure medium. In the same way leads from the pump P2, a suction line S2 in the transverse wall 13e. This measure makes it possible to keep the suction lines S1 and S2 of the pumps P1 and P2 short.

In dem zweiten Aufnahmeraum 32 sind drei weitere Motor-Pumpe-Gruppen 44, 45, 46 nebeneinander liegend angeordnet. Die Motor-Pumpe-Gruppen 44 bis 46 weisen ebenfalls einem Elektromotor M auf, der jeweils zwei an ihm gehaltene Hydropumpen P1 und P2 antreibt. Die Pumpen P1 und P2 der Motor-Pumpe-Gruppen 44 bis 46 sind wie die entsprechenden Pumpen der Motor-Pumpe-Gruppen 40 bis 42 der Querwand 13e zugewandt, wobei von den Pumpen P1 und P2 je eine Saugleitung S1 bzw. S2 in die Querwand 13e des Vorratsbehälters 13 für das hydraulische Druckmittel führt.In the second receiving space 32, three further motor-pump groups 44, 45, 46 are arranged side by side. The motor-pump groups 44 to 46 also have an electric motor M which drives two hydraulic pumps P1 and P2 held on it. The pumps P1 and P2 of the motor-pump groups 44 to 46, like the corresponding pumps of the motor-pump groups 40 to 42, face the transverse wall 13e, wherein in each case one suction line S1 or S2 into the transverse wall of the pumps P1 and P2 13e of the reservoir 13 for the hydraulic pressure medium leads.

Im Gegensatz zu einem beim Stand der Technik eingesetzten Vorratsbehälter mit einem U-förmigen Querschnitt, bei dem sich die Dämmwände über sämtliche Motor-Pumpe-Gruppen erstrecken, brauchen die Dämmwände 15, 20, 28 und 33 bei einem Vorratsbehälter mit H-förmigem Querschnitt gemäß der Erfindung jeweils nur einen der Aufnahmeräume 25 bzw. 32 zu verschließen. Die erfindungsgemäße Ausgestaltung des Vorratsbehälters 13 ermöglicht daher Dämmwände, die kleinere Abmessungen besitzen als dies beim Stand der Technik der Fall ist.In contrast to a reservoir used in the prior art with a U-shaped cross section, in which the insulating walls extend over all motor-pump groups, the insulating walls need 15, 20, 28 and 33 in a reservoir with H-shaped cross-section according to The invention in each case only one of the receiving spaces 25 and 32 to close. The inventive design of the reservoir 13 therefore allows Dämmwände that have smaller dimensions than is the case in the prior art.

Abweichend von dem in den Figuren 1 und 2 dargestellten Ausführungsbeispiel, bei dem die einzelnen Motor-Pumpe-Gruppen liegend in den beiden Aufnahmeräumen angeordnet sind, ist es auch möglich, die Motor-Pumpe-Gruppen stehend anzuordnen, wobei der Elektromotor vorzugsweise jeweils oberhalb der Hydropumpe (bzw. der Hydropumpen) angeordnet ist.Notwithstanding the embodiment shown in Figures 1 and 2, in which the individual motor-pump groups are arranged horizontally in the two receiving spaces, it is also possible to arrange the motor-pump groups standing, the electric motor preferably above the Hydro pump (or the hydraulic pump) is arranged.

Claims (3)

Geräuscharmes Hydraulikaggregat, das in der Art eines allseitig geschlossenen quaderförmigen Rahmens ausgebildet ist, - mit einer den Boden des Rahmens bilden Grundplatte, - mit einem Vorratsbehälter für hydraulisches Druckmittel, der mindestens zwei Wände des Rahmens bildet, - mit mehreren an der Grundplatte gehaltenen Motor-Pumpe-Gruppen, die aus je einem Elektromotor und mindestens einer von diesem angetriebenen Pumpe gebildet sind, und - bei dem die weiteren Wände des Rahmens als Dämmwände ausgebildet sind, dadurch gekennzeichnet, - daß der Vorratsbehälter (13) zwei Seitenwände (13a und 13b, 13c und 13d) des Rahmens (10) bildet, - daß eine Querwand (13e) die beiden Seitenwände (13a und 13b, 13c und 13d) derart miteinander verbindet, daß der Vorratsbehälter (13) H-förmigen Querschnitt aufweist, wobei sich zwischen der Querwand (13e) und zwei an diese angrenzenden, einander gegenüberliegenden Abschnitten (13a und 13c, 13b und 13d) der Seitenwände (13a und 13b, 13c und 13d) je ein Aufnahmeraum (25, 32) erstreckt, und - daß die Motor-Pumpe-Gruppen (40 bis 42, 44 bis 46) in den Aufnahmeräumen (25, 32) angeordnet sind. Low-noise hydraulic unit, which is designed in the manner of an all-round closed cuboid frame, - with a base plate forming the bottom of the frame, - With a reservoir for hydraulic pressure medium, which forms at least two walls of the frame, - With several held on the base plate motor-pump groups, which are each formed of an electric motor and at least one pump driven by this, and - In which the other walls of the frame are formed as Dämmwände, characterized, - That the reservoir (13) has two side walls (13a and 13b, 13c and 13d) of the frame (10), - That a transverse wall (13 e), the two side walls (13 a and 13 b, 13 c and 13 d) interconnected such that the reservoir (13) has H-shaped cross section, wherein between the transverse wall (13 e) and two adjacent to each other, each other opposite portions (13a and 13c, 13b and 13d) of the side walls (13a and 13b, 13c and 13d) each have a receiving space (25, 32) extending, and - That the motor-pump groups (40 to 42, 44 to 46) in the receiving spaces (25, 32) are arranged. Hydraulikaggregat nach Anspruch 1, dadurch gekennzeichnet, daß die Motor-Pumpe-Gruppen (40 bis 42, 44 bis 46) gleichmäßig auf die Aufnahmeräume (25, 32) verteilt sind.Hydraulic unit according to Claim 1, characterized in that the motor-pump groups (40 to 42, 44 to 46) are distributed uniformly over the receiving spaces (25, 32). Hydraulikaggregat nach Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, daß die Motor-Pumpe-Gruppen (40 bis 42, 44 bis 46) derart nebeneinander liegend angeordnet sind, daß die Pumpen (P1, P2) der Querwand (13e) zugewandt sind.Hydraulic unit according to Claim 1 or Claim 2, characterized in that the motor-pump groups (40 to 42, 44 to 46) are arranged side by side in such a way that the pumps (P1, P2) face the transverse wall (13e).
EP03021586A 2002-10-22 2003-09-25 Low noise hydraulic power unit Expired - Lifetime EP1413772B1 (en)

Applications Claiming Priority (2)

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DE10249337 2002-10-22
DE10249337A DE10249337A1 (en) 2002-10-22 2002-10-22 Low-noise hydraulic unit

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ATE309470T1 (en) 2005-11-15

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