EP1574714A2 - Pump unit - Google Patents

Pump unit Download PDF

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Publication number
EP1574714A2
EP1574714A2 EP05005006A EP05005006A EP1574714A2 EP 1574714 A2 EP1574714 A2 EP 1574714A2 EP 05005006 A EP05005006 A EP 05005006A EP 05005006 A EP05005006 A EP 05005006A EP 1574714 A2 EP1574714 A2 EP 1574714A2
Authority
EP
European Patent Office
Prior art keywords
pump
pump unit
electric motor
hydraulic fluid
inner tube
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.)
Granted
Application number
EP05005006A
Other languages
German (de)
French (fr)
Other versions
EP1574714B1 (en
EP1574714A3 (en
Inventor
Dieter Jordan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Turbo H and L Hydraulic GmbH and Co KG
Original Assignee
Hartmann and Lammle GmbH and Co KG
Voith Turbo H and L Hydraulic GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hartmann and Lammle GmbH and Co KG, Voith Turbo H and L Hydraulic GmbH and Co KG filed Critical Hartmann and Lammle GmbH and Co KG
Publication of EP1574714A2 publication Critical patent/EP1574714A2/en
Publication of EP1574714A3 publication Critical patent/EP1574714A3/en
Application granted granted Critical
Publication of EP1574714B1 publication Critical patent/EP1574714B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04B23/00—Pumping installations or systems
    • F04B23/02—Pumping installations or systems having reservoirs
    • F04B23/021—Pumping installations or systems having reservoirs the pump being immersed in 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
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric 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
    • 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
    • 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
    • F04B53/08—Cooling; Heating; Preventing freezing

Definitions

  • the invention relates to a pump unit comprising a Electric motor and at least one by the electric motor driven delivery pump for conveying Hydraulic fluid, wherein the electric motor and the Feed pump together in a closed housing are housed.
  • Such pump units are used to supply in particular machine tools with hydraulic fluid. From the prior art (DE 38 39 689 C2 or DE 100 22 174 Al) are different, such pump units known.
  • Known pump units have the disadvantage that due to the moving parts of the electric motor and the Feed pump comparatively loud operating noise cause. With a corresponding performance of the Pump unit is also an additional cooling of the Electric motor or the feed pump desirable.
  • U1 is a low-noise Hydraulic unit has become known in which the Electric motor and the pump of sound-absorbing Sidewalls is surrounded.
  • the sound-absorbing side walls are partly having a U-shaped cross-section Reservoir and partly formed Dämmcontactn.
  • a hydraulic unit which provides a dry running electric motor, which is surrounded by an oil reservoir.
  • the oil tank sees an inner container tube and an outer container tube in front.
  • To the two container tubes is as a separate component a hydraulic pump flanged.
  • Between the electric motor and the inner container wall is a star-shaped, ribs having provided cooling element, by the one of Fan wheel sucked air flowing through a radiator flows through and causes the cooling of the electric motor.
  • the oil tank 10 serves as an oil tank and has depending on Operating state different levels on. To the Filling the oil tank is an oil filler neck intended.
  • the present invention is based on the object Pump unit of the type mentioned in the way to train that these low despite high performance Operating noise causes only a small Requested space and has a simple structure.
  • This task is accomplished by a pump set with the Characteristics of claim 1 solved. Due to the Flow through the gap of the housing wall is in particular, an effective noise damping of Pump unit causes, whereby the noise emission of the Pump unit can be greatly reduced. In addition, can by the flow cooling of the housing, the Electric motor and / or the feed pump can be achieved.
  • the Pump unit is therefore separated from two Hydraulic fluid flows through to one from the actual pumped by the pump pump suction liquid circulation in the space between the housing wall and on the other hand from the cooling liquid circuit through the Electric motor flows. It is both the feed pump as also the electric motor completely under Hydraulic fluid and the electric motor is from the Hydraulic fluid flows through.
  • the rotor of the Electric motor rotates in the hydraulic fluid.
  • the wall of the housing is at least is formed in sections as a double wall, whose Interspace of hydraulic fluid can be flowed through. This can be a large-scale and effective Vibration of the pump set can be achieved.
  • the housing cylindrical in particular circular cylindrical, is formed and that as a double wall an outer tube and a inner, concentrically arranged to the outer tube, inner tube is provided.
  • the space between the inner tube and the outer tube is flowed through.
  • the entire space between Inner tube and outer tube flows through evenly, so that optimal vibration damping and / or cooling of the Pump unit, or its housing reached can be.
  • Straight cylindrical geometries of the housing in Shape of inner tube and outer tube can be easily and inexpensive way to manufacture and still lead to an effective vibration damping and / or cooling.
  • the stator of the electric motor according to the invention at the Inside the inner tube arranged. He can do it for example, in the axial direction centered on the inside the inner tube shrunk, glued, welded, screwed or the like may be arranged. A simple yet durable arrangement results then when the electric motor hits the inside of the Shrunk on the inner tube and additionally with the inner tube is arranged glued.
  • At least one end face of the outer tube and the Inner tube covered by a common cover element is, wherein the cover member a first contact portion for the inner tube and a second abutment section for the Having outer tube.
  • the investment sections can hereby especially in each case as a collar, cylinder counterbore, Ring recess or the like, each with and / or without Be executed sealing elements.
  • the cover element In addition to the cover of open sides of the two tubes serves the cover element therefore also for centering and positionally accurate Arrangement of the two pipes.
  • both free sides of the tubes each have a cover element be arranged. It is conceivable that the two Cover elements formed at least substantially identical are.
  • attachment means for permanent attachment of the cover elements to the pipes be provided. In particular, for example Tie rods find use, with which the cover elements be clamped against the free ends of the tubes.
  • the cover elements also connections for the suction line and the pressure line of the feed pump and / or connections for the line for flowing around the feed pump or provide flow through the wall.
  • all connections of the Pump unit provided on the cover element.
  • a bearing plate on the inside of the Be arranged inside tube for storage of the drive shaft of the electric motor can According to the invention, a bearing plate on the inside of the Be arranged inside tube.
  • the drive shaft of the Electric motor advantageously takes advantage of this End shield such that on the electric motor opposite side of the bearing plate, the feed pump with the Drive shaft of the electric motor can be coupled.
  • the feed pump in turn is advantageously on the Attached inside the lid member.
  • the pump unit thus form the inner tube with the Electric motor and the bearing plate an assembly.
  • a further assembly forms the cover element, on which the Pre-pump conveyor is arranged.
  • the pump can, for example, by means of bolts on the Be screwed inside the lid member.
  • the cover element together with the pump on the Inner tube with electric motor and bearing plate attached.
  • at the coupling between the drive shaft of the electric motor and the feed pump may be a plug-in coupling, in particular a cross-coupling, act.
  • a cooling device for cooling the Part of the hydraulic fluid which is the Feed pump flows around or the wall flows through.
  • the cooling device can either inside the case or outside the case, then as a separate module, be provided.
  • About the Cooling device can reduce the temperature of the Hydraulic fluid can be adjusted.
  • the Pump unit as a multiple pump unit, and in particular as a double pump unit, is formed. It can the Electric motor on both sides of a drive shaft section have, which is in each case coupled with a feed pump. At the two, opposite free ends of the Inner tube and the outer tube can then each one Cover element may be provided, in each case at the Inside the respective lid member a feed pump is provided.
  • the feed pumps can hereby for Achieving different flow rates, respectively different pressures, be designed. This has in return to known multiple pump units, in which the individual feed pumps lying on a shaft arranged one behind the other, the advantage that the individual couplings only only the load torque have to transfer the coupled with them feed pump applies.
  • FIG. 1 shows an inventive pump unit 10 shown having an electric motor 12 and two through the Electric motor 12 driven feed pumps 14, 16 for Promotion of hydraulic fluid includes.
  • the Electric motor 12 and the two feed pumps 16 are in a housing 18 housed in the area of his Mantels has a double wall, the space between them 20 during operation of the pump unit of a part of hydraulic fluid delivered to the pump unit is flowed through.
  • the housing 18 is essentially formed by a circular cylindrical inner tube 22, a circular cylindrical Outer tube 24, and two the respective end faces of the Inner tube 22 and the outer tube 24 occlusive Cover elements 26, 28.
  • the inner tube 22 and the outer tube 24 are arranged concentrically with each other; between the Outside of the inner tube and the inside of the Outer tube is that of hydraulic fluid flow-through gap 20.
  • the stator 13 of the electric motor 12 is on the inside the inner tube 22 fixedly disposed, for example by Shrinking and / or gluing.
  • the electric motor 12 sees on the rotor 15, a drive shaft 30 before, the free ends one each on the inside of the inner tube 22nd pass through arranged bearing plate 32.
  • the free ends the drive shaft 30 are connected to the respective feed pump 14, 16 rotationally coupled and drive the respective feed pump 14, 16 on.
  • the rotary coupling is advantageously such that the feed pumps 14, 16 in the axial direction of the free ends of the drive shaft 30 can be plugged.
  • the feed pumps 16, 18 are bolt bolts 34 on the Inside of the respective lid member 26, 28th screwed on and are each in a corresponding Housing interior section 51.
  • the cover elements 26, 28 are in turn about tie rods 36 with each other such clamped that the inner tube 22 between the two Cover elements 26, 28 is held under pressure.
  • the outer tube 24 is floating between the Cover elements 26, 28 arranged.
  • abutment sections 38, 40 For positionally accurate arrangement of the inner tube 22 and Outer tube 24 have the cover elements 26, 28 on their inwardly facing sides abutment sections 38, 40 to centered system of the end faces of the inner tube 22 and of the outer tube 24.
  • the abutment sections 38, 40 become formed by ring-like circumferential shoulders.
  • Sealing elements provided for sealing the joining surface between the outer tube 24 and the respective cover element 26, 28 are provided.
  • an annular groove 42 for receiving an O-ring 44 provided.
  • the two cover elements 26, 28 each have at least three ports, namely a suction port 46 and a pressure port 48 of the suction pump fluid circuit and a circuit connection 50 for one from the suction pump liquid circuit separately trained cooling and damping medium circuit.
  • the Connections are shown in Figure 2, the Top view of the inside of the lid member 26th reproduces.
  • To the suction port 46 and the Pressure port 4B close to a suction line 47th or a pressure line 49.
  • the connection 46 leads to the suction side 52 of the feed pump 16.
  • Der Pressure port 48 comes from the pressure side 54 of Feed pump 16.
  • the circuit connection 50 leads to a Cover outlet 56, through which the through the circuit connection 50 pumped hydraulic fluid as cooling and Damping means 58 via which the feed pumps 14, 16 receiving housing interior portions 51 in the Gap 20 between the inner tube 22 and the outer tube 24 arrived.
  • the inner tube 22 sees various passages 60, through which the cooling and damping means 58 of the housing interior portions 51 into which it Delivery pumps 14, 16 flows around, in the intermediate space 20 arrives.
  • the cooling-damping means 58 first in the on the Inside of the inner tube 22 located Housing interior sections 51 passed from where it over the Passages 60 passes into the intermediate space 20.
  • corresponding passages 62 are present.
  • the lid exit 56 directly in the area between the inner tube 22 and the Outer tube 24 is located, whereby the cooling-damping means 58th is conveyed directly into the intermediate space 20.
  • both Delivery pumps 16, 18 and the double wall 18 of cooling and damping means 58 flows around or flows through.
  • This can be an effective Cooling of the electric motor 12 and the two feed pumps 16, 18 can be achieved and on the other hand an effective Damping of the entire pump set.
  • By the damping In particular, noise emissions are greatly reduced; the Operating noise of the pump set is greatly reduced.
  • a cooling device provided is, with the hydraulic oil or the cooling-damping means 58 to a corresponding temperature is cooled.
  • a cooling device is in the Figure 2 indicated by the reference numeral 68.
  • the Cooling device 68 may be within the pump set be arranged or as its own assembly the Pump unit 10 upstream.
  • the electric motor 12 with stator 13 and rotor 15 is in the in the embodiment shown in Figure 2 of the invention of Cooling and damping means 58 also flows through; of the Rotor 15 thus rotates in the cooling and damping means 58th
  • the two pumps 14, 16 can be different flow rates or realize delivery pressures. Depending on desired flow rate or delivery pressure can in one and the same housing to a corresponding feed pump the inside of the respective cover element 26, 28th be arranged. It is also conceivable that the pump unit 10 is operated only with a feed pump. Depending on Size of the inner tube 22 and outer tube 24 and the housing interior 51 may be the volume of the cooling-damping means 58 inside the pump unit be set. This can optionally be separate reservoir for hydraulic fluid be kept relatively small or completely eliminated.

Abstract

The electrically-driven pump assembly (10) for hydraulic fluid has pump modules (14,16) at either end of a shaft (30) carrying the rotor (15). The shaft is carried on two bearings (32). The stator (13) of the electric motor (12) is surrounded by a housing (22) which accommodates the two pump modules. The stator support tube fits concentrically inside an outer housing (18). The hydraulic fluid enters through a channel (58) in the first end (26) of the pump assembly. The first pump assembly drives the fluid through the annular channel (20) between the two housings toward the second pump. Fluid can flow through the motor to cool it.

Description

Die Erfindung betrifft ein Pumpenaggregat, umfassend einen Elektromotor und wenigstens eine durch den Elektromotor angetriebene Förderpumpe zum Fördern von Hydraulikflüssigkeit, wobei der Elektromotor und die Förderpumpe gemeinsam in einem geschlossenen Gehäuse untergebracht sind.The invention relates to a pump unit comprising a Electric motor and at least one by the electric motor driven delivery pump for conveying Hydraulic fluid, wherein the electric motor and the Feed pump together in a closed housing are housed.

Derartige Pumpenaggregate dienen zur Versorgung von insbesondere Werkzeugmaschinen mit Hydraulikflüssigkeit. Aus dem Stand der Technik (DE 38 39 689 C2 oder DE 100 22 174 Al) sind verschiedene, derartige Pumpenaggregate bekannt. Bekannte Pumpenaggregate haben den Nachteil, dass sie aufgrund der bewegten Teile des Elektromotors und der Förderpumpe vergleichsweise laute Betriebsgeräusche verursachen. Bei einer entsprechenden Leistung des Pumpenaggregats ist außerdem zusätzlich eine Kühlung des Elektromotors beziehungsweise der Förderpumpe wünschenswert.Such pump units are used to supply in particular machine tools with hydraulic fluid. From the prior art (DE 38 39 689 C2 or DE 100 22 174 Al) are different, such pump units known. Known pump units have the disadvantage that due to the moving parts of the electric motor and the Feed pump comparatively loud operating noise cause. With a corresponding performance of the Pump unit is also an additional cooling of the Electric motor or the feed pump desirable.

Aus der DE 202 202 46 U1 ist ein geräuscharmes Hydraulikaggregat bekannt geworden, bei dem der Elektromotor und die Förderpumpe von schalldämmenden Seitenwänden umgeben ist. Die schalldämmenden Seitenwänden werden teils von einem U-förmigen Querschnitt aufweisenden Vorratsbehälter und teils Dämmwänden gebildet.From DE 202 202 46 U1 is a low-noise Hydraulic unit has become known in which the Electric motor and the pump of sound-absorbing Sidewalls is surrounded. The sound-absorbing side walls are partly having a U-shaped cross-section Reservoir and partly formed Dämmwänden.

Aus der DE 198 59 340 C2 ist eine elektrohydraulische Einheit bekannt geworden, die einen trockenlaufenden Elektromotor vorsieht, der zum Antrieb einer Fördereinheit dient. Der trockenlaufende Elektromotor und die Fördereinheit sind dabei in einem gemeinsamen, komplex aufgebauten Gehäuse untergebracht. Um das Gehäuse ist abschnittsweise eine Schale vorhanden, wobei zwischen dem Gehäuse und der Schale Hydraulikflüssigkeit durchströmt.From DE 198 59 340 C2 is an electro-hydraulic Unit became known, which is a dry-running Electric motor provides that to drive a conveyor unit serves. The dry running electric motor and the Feed unit are doing in a common, complex housing housed. To the case is in sections, a shell exists, with between the Housing and the shell hydraulic fluid flows through.

Aus der DE 196 52 706 A1 ist ein Hydraulikaggregat bekannt geworden, das einen trockenlaufenden Elektromotor vorsieht, der von einem Ölbehälter umgeben ist. Der Ölbehälter sieht dabei ein inneres Behälterrohr und ein äußeres Behälterrohr vor. An die beiden Behälterrohre ist als separates Bauteil eine Hydropumpe angeflanscht. Zwischen dem Elektromotor und der inneren Behälterwandung ist ein sternförmiges, Rippen aufweisendes Kühlelement vorgesehen, durch das von einem Lüfterrad angesaugte, einen Kühler durchströmende Luft hindurchströmt und die Kühlung des Elektromotors bewirkt. Der Ölbehälter 10 dient dabei als Öltank und weist je nach Betriebszustand unterschiedliche Füllstände auf. Zum Befüllen des Ölbehälters ist ein Öleinfüllstutzen vorgesehen.From DE 196 52 706 A1 a hydraulic unit is known become, which provides a dry running electric motor, which is surrounded by an oil reservoir. The oil tank sees an inner container tube and an outer container tube in front. To the two container tubes is as a separate component a hydraulic pump flanged. Between the electric motor and the inner container wall is a star-shaped, ribs having provided cooling element, by the one of Fan wheel sucked air flowing through a radiator flows through and causes the cooling of the electric motor. The oil tank 10 serves as an oil tank and has depending on Operating state different levels on. To the Filling the oil tank is an oil filler neck intended.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Pumpenaggregat der eingangs genannten Art in der Weise auszubilden, dass diese trotz hoher Leistung geringe Betriebsgeräusche verursacht, lediglich einen geringen Bauraum beansprucht und einen einfachen Aufbau aufweist. Außerdem ist wünschenswert, das Pumpenaggregat mit einer geeigneten Kühlung zu betreiben.The present invention is based on the object Pump unit of the type mentioned in the way to train that these low despite high performance Operating noise causes only a small Requested space and has a simple structure. In addition, it is desirable that the pump unit with a to operate suitable cooling.

Diese Aufgabe wird durch ein Pumpenaggregat mit den Merkmalen des Anspruchs 1 gelöst. Aufgrund der Durchströmung des Zwischenraums der Gehäusewandung wird insbesondere eine effektive Geräuschdämpfung des Pumpenaggregats bewirkt, wodurch die Geräuschemission des Pumpenaggregats stark reduziert werden kann. Außerdem kann durch die Durchströmung eine Kühlung des Gehäuses, des Elektromotors und/oder der Förderpumpe erreicht werden. Das Pumpenaggregat wird folglich von zwei getrennten Hydraulikflüssigkeitsströmen durchflossen, zum einem vom eigentlichen von der Förderpumpe geförderten Saug-Pump-Flüssigkeitskreislauf im Zwischenraum der Gehäusewandung und zum anderen vom Kühlflüssigkeitskreislauf der durch den Elektromotor Strömt. Dabei liegt sowohl die Förderpumpe als auch der Elektromotor vollständig unter Hydraulikflüssigkeit und der Elektromotor wird von der Hydraulikflüssigkeit durchströmt. Der Rotor des Elektromotors dreht sich dabei in der Hydraulikflüssigkeit. Durch Verwendung von einem Teil der vom Pumpenaggregat geförderten Hydraulikflüssigkeit zur Schwingungsdämpfung und/oder Kühlung ist kein zusätzliches Betriebsmittel erforderlich. Das Pumpenaggregat kann auf einfache Art und Weise montiert werden, da bei der Montage später zum Einsatz kommende Schwingungsdämpfungsmittel und/oder Kühlmittel nicht mit montiert werden müssen. Außerdem wird aufgrund des Volumens, das für die Umströmung beziehungsweise Durchströmung vorgesehen ist, das gesamte vorratsvolumen der Hydraulikflüssigkeit vergrößert. Hierdurch kann der eigentliche Hydrauliktank, aus dem das Pumpenaggregat fördert, kleiner ausfallen oder auch ganz entfallen. This task is accomplished by a pump set with the Characteristics of claim 1 solved. Due to the Flow through the gap of the housing wall is in particular, an effective noise damping of Pump unit causes, whereby the noise emission of the Pump unit can be greatly reduced. In addition, can by the flow cooling of the housing, the Electric motor and / or the feed pump can be achieved. The Pump unit is therefore separated from two Hydraulic fluid flows through to one from the actual pumped by the pump pump suction liquid circulation in the space between the housing wall and on the other hand from the cooling liquid circuit through the Electric motor flows. It is both the feed pump as also the electric motor completely under Hydraulic fluid and the electric motor is from the Hydraulic fluid flows through. The rotor of the Electric motor rotates in the hydraulic fluid. By using part of the pump unit subsidized hydraulic fluid for vibration damping and / or cooling is not an additional resource required. The pump unit can easily and How to assemble, since during assembly later to Use coming vibration damping and / or Coolant does not have to be mounted with. In addition, will due to the volume required for the flow around or flow is provided, the entire Reservoir volume of the hydraulic fluid increases. This allows the actual hydraulic tank from which the Pump unit promotes smaller or even completely omitted.

Erfindungsgemäß ist die Wandung des Gehäuses wenigstens abschnittsweise als doppelte Wandung ausgebildet ist, deren Zwischenraum von Hydraulikflüssigkeit durchströmbar ist. Dadurch kann eine großflächige und effektive Schwingungsdampfung des Pumpenaggregats erreicht werden.According to the invention, the wall of the housing is at least is formed in sections as a double wall, whose Interspace of hydraulic fluid can be flowed through. This can be a large-scale and effective Vibration of the pump set can be achieved.

Erfindungsgemäß ist ferner vorgesehen, dass das Gehäuse zylindrisch, insbesondere kreiszylindrisch, ausgebildet ist und dass als doppelte Wandung ein Außenrohr und ein inneres, konzentrisch zum Außenrohr angeordnetes, Innenrohr vorgesehen ist. Der Zwischenraum zwischen dem Innenrohr und dem Außenrohr ist dabei durchströmbar. Im Betriebszustand wird vorteilhafterweise der gesamte Zwischenraum zwischen Innenrohr und Außenrohr gleichmäßig durchströmt, so dass eine optimale Schwingungsdämpfung und/oder Kühlung des Pumpenaggregats, beziehungsweise dessen Gehäuse, erreicht werden kann. Gerade zylindrische Geometrien des Gehäuses in Form von Innenrohr und Außenrohr lassen sich auf einfache und kostengünstige Art herstellen und führen dennoch zu einer effektiven Schwingungsdämpfung und/oder Kühlung.According to the invention it is further provided that the housing cylindrical, in particular circular cylindrical, is formed and that as a double wall an outer tube and a inner, concentrically arranged to the outer tube, inner tube is provided. The space between the inner tube and the outer tube is flowed through. In operating condition is advantageously the entire space between Inner tube and outer tube flows through evenly, so that optimal vibration damping and / or cooling of the Pump unit, or its housing reached can be. Straight cylindrical geometries of the housing in Shape of inner tube and outer tube can be easily and inexpensive way to manufacture and still lead to an effective vibration damping and / or cooling.

Der Stator des Elektromotor ist erfindungsgemäß an der Innenseite des Innenrohrs angeordnet. Er kann dabei beispielsweise in axialer Richtung mittig an der Innenseite des Innenrohrs aufgeschrumpft, angeklebt, angeschweißt, angeschraubt oder dergleichen angeordnet sein. Eine einfache, und dennoch dauerhafte Anordnung ergibt sich dann, wenn der Elektromotor auf die Innenseite des Innenrohrs aufgeschrumpft und zusätzlich mit dem Innenrohr verklebt angeordnet ist.The stator of the electric motor according to the invention at the Inside the inner tube arranged. He can do it for example, in the axial direction centered on the inside the inner tube shrunk, glued, welded, screwed or the like may be arranged. A simple yet durable arrangement results then when the electric motor hits the inside of the Shrunk on the inner tube and additionally with the inner tube is arranged glued.

Gemäß einer Ausbildung der Erfindung ist vorgesehen, dass wenigstens eine Stirnseite des Außenrohrs und des Innenrohrs von einem gemeinsamen Deckelelement abgedeckt wird, wobei das Deckelelement einen ersten Anlageabschnitt für das Innenrohr und einen zweiten Anlageabschnitt für das Außenrohr aufweist. Die Anlageabschnitte können hierbei insbesondere jeweils als Ringbund, Zylindersenkung, Ringaussparung oder dergleichen, jeweils mit und/oder ohne Dichtungselemente ausgeführt sein. Neben der Abdeckung der offenen Seiten der beiden Rohre dient das Deckelelement folglich außerdem zur Zentrierung und positionsgenauen Anordnung der beiden Rohre. Erfindungsgemäß können an beiden freien Seiten der Rohre jeweils ein Deckelelement angeordnet sein. Dabei ist denkbar, dass die beiden Deckelelemente wenigstens weitgehend identisch ausgebildet sind. An den Deckelelementen können Befestigungsmittel zur dauerhaften Befestigung der Deckelelemente an den Rohren vorgesehen sein. Insbesondere können beispielsweise Zuganker Verwendung finden, mit denen die Deckelelemente gegen die freien Stirnseiten der Rohre gespannt werden. According to one embodiment of the invention, it is provided that at least one end face of the outer tube and the Inner tube covered by a common cover element is, wherein the cover member a first contact portion for the inner tube and a second abutment section for the Having outer tube. The investment sections can hereby especially in each case as a collar, cylinder counterbore, Ring recess or the like, each with and / or without Be executed sealing elements. In addition to the cover of open sides of the two tubes serves the cover element therefore also for centering and positionally accurate Arrangement of the two pipes. According to the invention can both free sides of the tubes each have a cover element be arranged. It is conceivable that the two Cover elements formed at least substantially identical are. On the cover elements attachment means for permanent attachment of the cover elements to the pipes be provided. In particular, for example Tie rods find use, with which the cover elements be clamped against the free ends of the tubes.

Gemäß einer weiteren Ausführungsform der Erfindung können die Deckelelemente außerdem Anschlüsse für die Saugleitung und die Druckleitung der Förderpumpe und/oder Anschlüsse für die Leitung zum Umströmen der Förderpumpe beziehungsweise Durchströmen der Wandung vorsehen. Vorteilhafterweise sind sämtliche Anschlüsse des Pumpenaggregats am Deckelelement vorgesehen. Dies hat den Vorteil, dass insbesondere das Außenrohr als durchgängiges, geschlossenes Rohr verbaubar ist.According to a further embodiment of the invention the cover elements also connections for the suction line and the pressure line of the feed pump and / or connections for the line for flowing around the feed pump or provide flow through the wall. Advantageously, all connections of the Pump unit provided on the cover element. This has the Advantage that in particular the outer tube as a continuous, closed pipe is buildable.

Zur Lagerung der Antriebswelle des Elektromotors kann erfindungsgemäß ein Lagerschild an der Innenseite des Innenrohrs angeordnet sein. Die Antriebswelle des Elektromotors durchgreift dabei vorteilhafterweise das Lagerschild derart, dass auf der dem Elektromotor abgewandten Seite des Lagerschildes die Förderpumpe mit der Antriebswelle des Elektromotors koppelbar ist.For storage of the drive shaft of the electric motor can According to the invention, a bearing plate on the inside of the Be arranged inside tube. The drive shaft of the Electric motor advantageously takes advantage of this End shield such that on the electric motor opposite side of the bearing plate, the feed pump with the Drive shaft of the electric motor can be coupled.

Die Förderpumpe ihrerseits ist vorteilhafterweise auf der Innenseite des Deckelelements befestigt. Bei der Montage des Pumpenaggregats bilden folglich das Innenrohr mit dem Elektromotor und dem Lagerschild eine Baugruppe. Eine weitere Baugruppe bildet das Deckelelement, an dem die Förderpumpe vormonziert angeordnet ist. Die Förderpumpe kann dabei beispielsweise mittels Bolzenschrauben auf der Innenseite des Deckelelements angeschraubt sein. Bei der Endmontage wird das Deckelelement samt Förderpumpe auf das Innenrohr samt Elektromotor und Lagerschild aufgesetzt. Bei der Kopplung zwischen der Antriebswelle des Elektromotors und der Förderpumpe kann es sich um eine Steckkopplung, insbesondere um eine Kreuzsteckkopplung, handeln.The feed pump in turn is advantageously on the Attached inside the lid member. During installation the pump unit thus form the inner tube with the Electric motor and the bearing plate an assembly. A further assembly forms the cover element, on which the Pre-pump conveyor is arranged. The pump can, for example, by means of bolts on the Be screwed inside the lid member. In the Final assembly is the cover element together with the pump on the Inner tube with electric motor and bearing plate attached. at the coupling between the drive shaft of the electric motor and the feed pump may be a plug-in coupling, in particular a cross-coupling, act.

Gemäß einer weiteren Ausführungsform der Erfindung ist vorteilhaft, wenn eine Kühlvorrichtung zur Kühlung des Teils der Hydraulikflüssigkeit vorgesehen ist, der die Förderpumpe umströmt beziehungsweise die Wandung durchströmt. Die Kühlvorrichtung kann dabei entweder innerhalb des Gehäuses oder außerhalb des Gehäuses, dann als eigene Baugruppe, vorgesehen sein. Über die Kühlvorrichtung kann die Temperatur der Hydraulikflüssigkeit eingestellt werden.According to another embodiment of the invention advantageous if a cooling device for cooling the Part of the hydraulic fluid is provided, which is the Feed pump flows around or the wall flows through. The cooling device can either inside the case or outside the case, then as a separate module, be provided. About the Cooling device can reduce the temperature of the Hydraulic fluid can be adjusted.

Erfindungsgemäß ist ferner vorteilhaft, wenn das Pumpenaggregat als Mehrfachpumpenaggregat, und insbesondere als Doppelpumpenaggregat, ausgebildet ist. Dabei kann der Elektromotor beidseitig einen Antriebswellenabschnitt aufweisen, der jeweils mit einer Förderpumpe koppelbar ist. An den beiden, gegenüberliegenden freien Enden des Innenrohrs und des Außenrohrs kann dann jeweils ein Deckelelement vorgesehen sein, wobei jeweils an der Innenseite des jeweiligen Deckelelements eine Förderpumpe vorgesehen ist. Die Förderpumpen können hierbei zur Erreichung verschiedener Fördermengen, beziehungsweise verschiedener Drücke, ausgelegt sein. Dies hat im Gegenzatz zu bekannten Mehrfachpumpenaggregaten, bei denen die einzelnen Förderpumpen auf einer welle liegend hintereinander angeordnet sind, den Vorteil, dass die einzelnen Kopplungen lediglich nur das Lastmoment übertragen müssen, das die mit ihnen gekoppelte Förderpumpe aufbringt.According to the invention is also advantageous if the Pump unit as a multiple pump unit, and in particular as a double pump unit, is formed. It can the Electric motor on both sides of a drive shaft section have, which is in each case coupled with a feed pump. At the two, opposite free ends of the Inner tube and the outer tube can then each one Cover element may be provided, in each case at the Inside the respective lid member a feed pump is provided. The feed pumps can hereby for Achieving different flow rates, respectively different pressures, be designed. This has in return to known multiple pump units, in which the individual feed pumps lying on a shaft arranged one behind the other, the advantage that the individual couplings only only the load torque have to transfer the coupled with them feed pump applies.

Weitere Einzelheiten und vorteilhafte Ausgestaltungen der Erfindung sind der folgenden Beschreibung zu entnehmen, in der ein in der Figur dargestelltes Ausführungsbeispiel der Erfindung näher beschrieben und erläutert ist.Further details and advantageous embodiments of The invention will be apparent from the following description, in the one shown in the figure embodiment of the Invention described and explained in detail.

Es zeigen:Show it:

Figur 1FIG. 1
einen Längsschnitt durch ein erfindungsgemäßes Pumpenaggregat; unda longitudinal section through a inventive pump unit; and
Figur 2FIG. 2
eine Draufsicht auf die Innenseite des Deckelelements eines Pumpenaggregats gemäß Figur 1.a top view on the inside of the Cover element of a pump set according to FIG. 1

In der Figur 1 ist ein erfindungsgemäßes Pumpenaggregat 10 dargestellt, das einen Elektromotor 12 und zwei durch den Elektromotor 12 angetriebene Förderpumpen 14, 16 zur Förderung von Hydraulikflüssigkeit umfasst. Der Elektromotor 12 und die beiden Förderpumpen 16 sind in einem Gehäuse 18 untergebracht, das im Bereich seines Mantels eine doppelte Wandung aufweist, deren Zwischenraum 20 bei Betrieb des Pumpenaggregats von einem Teil der von dem Pumpenaggregat geförderten Hydraulikflüssigkeit durchströmt wird.FIG. 1 shows an inventive pump unit 10 shown having an electric motor 12 and two through the Electric motor 12 driven feed pumps 14, 16 for Promotion of hydraulic fluid includes. Of the Electric motor 12 and the two feed pumps 16 are in a housing 18 housed in the area of his Mantels has a double wall, the space between them 20 during operation of the pump unit of a part of hydraulic fluid delivered to the pump unit is flowed through.

Das Gehäuse 18 ist im Wesentlichen gebildet von einem kreiszylindrischen Innenrohr 22, einem kreiszylindrischen Außenrohr 24, und zwei die jeweiligen Stirnseiten des Innenrohrs 22 und des Außenrohrs 24 verschließenden Deckelelementen 26, 28. Das Innenrohr 22 und das Außenrohr 24 sind konzentrisch zueinander angeordnet; zwischen der Außenseite des Innenrohres und der Innenseite des Außenrohres liegt der von Hydraulikflüssigkeit durchströmbare Zwischenraum 20.The housing 18 is essentially formed by a circular cylindrical inner tube 22, a circular cylindrical Outer tube 24, and two the respective end faces of the Inner tube 22 and the outer tube 24 occlusive Cover elements 26, 28. The inner tube 22 and the outer tube 24 are arranged concentrically with each other; between the Outside of the inner tube and the inside of the Outer tube is that of hydraulic fluid flow-through gap 20.

Der Stator 13 des Elektromotors 12 ist an der Innenseite des Innenrohrs 22 fest angeordnet, beispielsweise durch Aufschrumpfen und/oder Verkleben. Der Elektromotor 12 sieht am Rotor 15 eine Antriebswelle 30 vor, deren freien Enden jeweils ein an der Innenseite des Innenrohrs 22 angeordnetes Lagerschild 32 durchgreifen. Die freien Enden der Antriebswelle 30 sind mit der jeweiligen Förderpumpe 14, 16 drehgekoppelt und treiben die jeweilige Förderpumpe 14, 16 an. Die Drehkopplung ist vorteilhafterweise derart, dass die Förderpumpen 14, 16 in axialer Richtung auf die freien Enden der Antriebswelle 30 aufsteckbar sind.The stator 13 of the electric motor 12 is on the inside the inner tube 22 fixedly disposed, for example by Shrinking and / or gluing. The electric motor 12 sees on the rotor 15, a drive shaft 30 before, the free ends one each on the inside of the inner tube 22nd pass through arranged bearing plate 32. The free ends the drive shaft 30 are connected to the respective feed pump 14, 16 rotationally coupled and drive the respective feed pump 14, 16 on. The rotary coupling is advantageously such that the feed pumps 14, 16 in the axial direction of the free ends of the drive shaft 30 can be plugged.

Die Förderpumpen 16, 18 sind über Bolzenschrauben 34 an der Innenseite des jeweiligen Deckelelements 26, 28 angeschraubt und liegen jeweils in einem entsprechenden Gehäuseinnenraumabschnitt 51. Die Deckelelemente 26, 28 sind ihrerseits über Zuganker 36 miteinander derart verspannt, dass das Innenrohr 22 zwischen den beiden Deckelelementen 26, 28 unter Druckbelastung gehalten wird. Das Außenrohr 24 ist schwimmend zwischen den Deckelelementen 26, 28 angeordnet.The feed pumps 16, 18 are bolt bolts 34 on the Inside of the respective lid member 26, 28th screwed on and are each in a corresponding Housing interior section 51. The cover elements 26, 28 are in turn about tie rods 36 with each other such clamped that the inner tube 22 between the two Cover elements 26, 28 is held under pressure. The outer tube 24 is floating between the Cover elements 26, 28 arranged.

Zur positionsgenauen Anordnung vom Innenrohr 22 und Außenrohr 24 weisen die Deckelelemente 26, 28 auf ihren nach innen gewandten Seiten Anlageabschnitte 38, 40 zur zentrierten Anlage der Stirnseiten des Innenrohrs 22 und des Außenrohrs 24 auf. Die Anlageabschnitte 38, 40 werden durch ringartig umlaufende Schultern gebildet. Vorteilhafterweise sind im Bereich der Anlageabschnitte 40 Dichtelemente vorgesehen, die zur Abdichtung der Fügefläche zwischen dem Außenrohr 24 und dem jeweiligen Deckelelement 26, 28 vorgesehen sind. In der Figur 1 ist im Bereich des Anlageabschnitts 28 eine Ringnut 42 zur Aufnahme eines O-Rings 44 vorgesehen.For positionally accurate arrangement of the inner tube 22 and Outer tube 24 have the cover elements 26, 28 on their inwardly facing sides abutment sections 38, 40 to centered system of the end faces of the inner tube 22 and of the outer tube 24. The abutment sections 38, 40 become formed by ring-like circumferential shoulders. Advantageously, in the area of the abutment sections 40 Sealing elements provided for sealing the joining surface between the outer tube 24 and the respective cover element 26, 28 are provided. In the figure 1 is in the range of Anlageabschnitts 28 an annular groove 42 for receiving an O-ring 44 provided.

Die beiden Deckelelemente 26, 28 weisen jeweils wenigstens drei Anschlüsse auf, nämlich einen Sauganschluss 46 und einen Druckanschluss 48 des Saug-Pump-Flüssigkeitskreislaufes sowie einen Kreislaufanschluss 50 für einem vom Saug-Pump- Flüssigkeitskreislauf separat ausgebildeten Kühl- und Dämpfungsmittelkreislauf. Die Anschlüsse sind in der Figur 2 dargestellt, die die Draufsicht auf die Innenseite des Deckelelements 26 wiedergibt. An den Sauganschluss 46 beziehungsweise den Druckanschluss 4B schließen sich eine Saugleitung 47 beziehungsweise eine Druckleitung 49 an. Der Anschluss 46 führt zur Saugseite 52 der Förderpumpe 16. Der Druckanschluss 48 kommt von der Druckseite 54 der Förderpumpe 16. Der Kreislaufanschluss 50 führt zu einem Deckelausgang 56, über den die durch den Kreislaufanschluss 50 geförderte Hydraulikflüssigkeit als Kühl- und Dämpfungsmittel 58 über die die Förderpumpen 14, 16 aufnehmenden Gehäuseinnenraumabschnitte 51 in den Zwischenraum 20 zwischen dem Innenrohr 22 und dem Außenrohr 24 gelangt. Das Innenrohr 22 sieht verschiedene Durchlässe 60 vor, durch welche das Kühl- und Dämpfungsmittel 58 von den Gehäuseinnenraumabschnitten 51, in den es die Förderpumpen 14, 16 umströmt, in den Zwischenraum 20 gelangt. Gemäß der Figur 1 wird über den Deckelausgang 56 das Kühl-Dämpfungsmittel 58 zunächst in die auf der Innenseite des Innenrohrs 22 gelegenen Gehäuseinnenraumabschnitte 51 geleitet, von wo es über die Durchlässe 60 in den Zwischenraum 20 gelangt. Auch am Lagerschild 32 sind entsprechende Durchlässe 62 vorhanden. Erfindungsgemäß wäre auch denkbar, dass der Deckelausgang 56 direkt im Bereich zwischen dem Innenrohr 22 und dem Außenrohr 24 liegt, wodurch das Kühl-Dämpfungsmittel 58 unmittelbar in den Zwischenraum 20 gefördert wird.The two cover elements 26, 28 each have at least three ports, namely a suction port 46 and a pressure port 48 of the suction pump fluid circuit and a circuit connection 50 for one from the suction pump liquid circuit separately trained cooling and damping medium circuit. The Connections are shown in Figure 2, the Top view of the inside of the lid member 26th reproduces. To the suction port 46 and the Pressure port 4B close to a suction line 47th or a pressure line 49. The connection 46 leads to the suction side 52 of the feed pump 16. Der Pressure port 48 comes from the pressure side 54 of Feed pump 16. The circuit connection 50 leads to a Cover outlet 56, through which the through the circuit connection 50 pumped hydraulic fluid as cooling and Damping means 58 via which the feed pumps 14, 16 receiving housing interior portions 51 in the Gap 20 between the inner tube 22 and the outer tube 24 arrived. The inner tube 22 sees various passages 60, through which the cooling and damping means 58 of the housing interior portions 51 into which it Delivery pumps 14, 16 flows around, in the intermediate space 20 arrives. According to FIG. 1, via the cover exit 56 the cooling-damping means 58 first in the on the Inside of the inner tube 22 located Housing interior sections 51 passed from where it over the Passages 60 passes into the intermediate space 20. As well on End shield 32 corresponding passages 62 are present. According to the invention, it would also be conceivable that the lid exit 56 directly in the area between the inner tube 22 and the Outer tube 24 is located, whereby the cooling-damping means 58th is conveyed directly into the intermediate space 20.

Wie in der Figur 2 deutlich wird, wird über den Sauganschluss 46 Hydraulikflüssigkeit aus einem Reservoir 64 gefördert. Über den Druckanschluss 48 wird die geförderte Hydraulikflüssigkeit einem Verbraucher 66 zugeführt. Ein Teil der Hydraulikflüssigkeit wird als Kühl- und Dämpfungsmittel 58 abgezweigt und über den Kreislaufanschluss 50 dem Pumpenaggregat 10 bzw. dem Kühl- und Dämpfungsmittelkreislauf zugeführt. Die Abzweigung kann innerhalb des Gehäuses oder. wie in Fig. 2 dargestellt, auch außerhalb des Gehäuses liegen.As is clear in the figure 2 is about the Suction connection 46 Hydraulic fluid from a reservoir 64 promoted. About the pressure port 48 is the delivered hydraulic fluid to a consumer 66th fed. Part of the hydraulic fluid is used as a coolant and damping means 58 branched off and over the Circuit connection 50 the pump unit 10 or the cooling and damping medium circuit supplied. The diversion can inside the case or. as shown in Fig. 2, also outside of the housing.

Wie aus der Figur 1 deutlich wird, werden beide Förderpumpen 16, 18 sowie die doppelte Wandung 18 von Kühl- und Dämpfungsmittel 58 umströmt beziehungsweise durchströmt. Hierdurch kann zum einen eine effektive Kühlung des Elektromotors 12 sowie der beiden Förderpumpen 16, 18 erreicht werden und zum anderen eine effektive Dämpfung des gesamten Pumpenaggregats. Durch die Dämpfung werden insbesondere Geräuschemissionen stark reduziert; das Betriebsgeräusch des Pumpenaggregats wird stark verringert.As is clear from Figure 1, both Delivery pumps 16, 18 and the double wall 18 of cooling and damping means 58 flows around or flows through. This can be an effective Cooling of the electric motor 12 and the two feed pumps 16, 18 can be achieved and on the other hand an effective Damping of the entire pump set. By the damping In particular, noise emissions are greatly reduced; the Operating noise of the pump set is greatly reduced.

Bevor das Hydrauliköl in das Pumpenaggregat 10 einfließt, kann vorgesehen sein, dass eine Kühlvorrichtung vorgesehen ist, mit der das Hydrauliköl beziehungsweise das Kühl-Dämpfungsmittel 58 auf eine entsprechende Temperatur gekühlt wird. Eine derartige Kühlvorrichtung ist in der Figur 2 mit dem Bezugszeichen 68 angedeutet. Die Kühlvorrichtung 68 kann innerhalb des Pumpenaggregats angeordnet sein oder als eigene Baugruppe dem Pumpenaggregat 10 vorgeschaltet sein.Before the hydraulic oil flows into the pump unit 10, can be provided that a cooling device provided is, with the hydraulic oil or the cooling-damping means 58 to a corresponding temperature is cooled. Such a cooling device is in the Figure 2 indicated by the reference numeral 68. The Cooling device 68 may be within the pump set be arranged or as its own assembly the Pump unit 10 upstream.

In der Figur 1 sind elektrische Leitungen 70 angedeutet, die von dem Elektromotor 12 zu einem Steckeranschluss 72 führen. Über die Leitungen 70 kann der Elektromotor 12 mit Strom versorgt werden-In the figure 1 electrical lines 70 are indicated, that of the electric motor 12 to a connector 72nd to lead. About the lines 70, the electric motor 12 with Supplied with electricity

Der Elektromotor 12 mit Stator 13 und Rotor 15 wird bei der in der Figur 2 gezeigten Ausführungsform der Erfindung vom Kühl- und Dämpfungsmittel 58 ebenfalls durchströmt; der Rotor 15 dreht sich folglich im Kühl- und Dämpfungsmittel 58. The electric motor 12 with stator 13 and rotor 15 is in the in the embodiment shown in Figure 2 of the invention of Cooling and damping means 58 also flows through; of the Rotor 15 thus rotates in the cooling and damping means 58th

Die beiden Pumpen 14, 16 können verschiedene Fördermengen beziehungsweise Förderdrücke realisieren. Je nach gewünschter Fördermenge beziehungsweise Förderdruck kann in ein und demselben Gehäuse eine entsprechende Förderpumpe an der Innenseite des jeweiligen Deckelelements 26, 28 angeordnet sein. Denkbar ist auch, dass das Pumpenaggregat 10 lediglich mit einer Förderpumpe betrieben wird. Je nach Größe des Innenrohrs 22 beziehungsweise Außenrohrs 24 und der Gehäuseinnenräume 51 kann das Volumen des Kühl-Dämpfungsmittels 58 innerhalb des Pumpenaggregats eingestellt werden. Dadurch kann gegebenenfalls ein separates Reservoir für Hydraulikflüssigkeit vergleichsweise klein gehalten werden oder ganz entfallen.The two pumps 14, 16 can be different flow rates or realize delivery pressures. Depending on desired flow rate or delivery pressure can in one and the same housing to a corresponding feed pump the inside of the respective cover element 26, 28th be arranged. It is also conceivable that the pump unit 10 is operated only with a feed pump. Depending on Size of the inner tube 22 and outer tube 24 and the housing interior 51 may be the volume of the cooling-damping means 58 inside the pump unit be set. This can optionally be separate reservoir for hydraulic fluid be kept relatively small or completely eliminated.

Claims (9)

Pumpenaggregat (10), umfassend einen Elektromotor (12) und wenigstens eine durch den Elektromotor (12) angetriebene Förderpumpe (14, 16) zum Fördern von Hydraulikflüssigkeit, wobei der Elektromotor (12) und die Förderpumpe (14, 16) bei Betrieb vollständig unter Hydraulikflüssigkeit liegend von Hydraulikflüssigkeit durchströmt werden und gemeinsam in einem geschlossenen und zylindrischen, insbesondere kreiszylindrischen Gehäuse (18) untergebracht sind, wobei das Gehäuse eine doppelte Wandung mit einem Außenrohr (24) und einem inneren, konzentrisch zum Außenrohr angeordneten Innenrohr (22) umfasst und der Zwischenraum der Wandung bei Betrieb von einem Teil (58) der von dem Pumpenaggregat (10) geförderten Hydraulikflüssigkeit durchströmt wird.Pump unit (10) comprising an electric motor (12) and at least one by the electric motor (12) driven feed pump (14, 16) for conveying Hydraulic fluid, wherein the electric motor (12) and the delivery pump (14, 16) completely under operation Hydraulic fluid lying from hydraulic fluid be flowed through and together in one closed and cylindrical, in particular circular cylindrical housing (18) are housed, the case being a double wall with a Outer tube (24) and an inner, concentric to Outer tube arranged inner tube (22) and the Interspace of the wall during operation of a part (58) of the pump unit (10) funded Hydraulic fluid is flowed through. Pumpenaggregat (10) nach Anspruch 1, dadurch gekennzeichnet, dass der Stator des Elektromotors an der Innenseite des Innenrohres (22) angeordnet ist (12).Pump unit (10) according to claim 1, characterized in that the stator of the electric motor on the inside of the inner tube (22) is arranged (12). Pumpenaggregat (10) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass wenigstens eine Stirnseite des Außenrohrs (24) und des Innenrohrs (22) von einem gemeinsamen Deckelement (26, 28) abgedeckt wird, wobei das Deckelelement einen erste Anlageabschnitt (38) für das Innenrohr (22) und einen zweiten Anlageabschnitt (40) für das Außenrohr (24) aufweist.Pump unit (10) according to claim 1 or 2, characterized in that at least one end face of the outer tube (24) and the inner tube (22) by a common cover element (26, 28) is covered, wherein the cover member has a first abutment portion (38) for the inner tube (22) and a second abutment portion (40) for the outer tube (24). Pumpenaggregat (10) nach Anspruch 3, dadurch gekennzeichnet, dass am Deckelelement (26, 28) Anschlüsse für die Saugleitung (47) und die Druckleitung (48) der Förderpumpe (14, 16) und/oder Anschlüsse (50) für die Leitung zum Umströmen der Förderpumpen (14, 16) und/oder Durchströmen der Wandung (18) vorgesehen sind.Pump unit (10) according to claim 3, characterized in that on the cover element (26, 28) connections for the suction line (47) and the pressure line (48) of the feed pump (14, 16) and / or connections (50) for the line to Circulation of the feed pumps (14, 16) and / or flow through the wall (18) are provided. Pumpenaggregat (10) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass wenigstens ein Lagerschild (32) zur Lagerung der Antriebswelle (30) des Elektromotors (12) an der Innenseite des Innenrohres angeordnet ist.Pump unit (10) according to one of claims 1 to 4, characterized in that at least one bearing plate (32) for supporting the drive shaft (30) of the electric motor (12) is arranged on the inside of the inner tube. Pumpenaggregat (10) nach Anspruch 5, dadurch gekennzeichnet, dass auf der dem Elektromotor (12) abgewandten Seite des Lagerschilds die mit der Antriebswelle (30) des Elektromotors (12) gekoppelte Förderpumpe (14, 16) angeordnet ist.Pump unit (10) according to claim 5, characterized in that on the side facing away from the electric motor (12) side of the bearing plate with the drive shaft (30) of the electric motor (12) coupled to the feed pump (14, 16) is arranged. , Pumpenaggregat (10) nach einem der Ansprüche 3 bis 6,
dadurch gekennzeichnet, dass die Förderpumpe (14, 16) auf der Innenseite des Deckelelements (26, 28) befestigt ist., Pump unit (10) according to one of claims 3 to 6,
characterized in that the feed pump (14, 16) on the inside of the cover member (26, 28) is attached. Pumpenaggregat (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass eine Kühlvorrichtung (68) zur Kühlung wenigstens des Teils (58) der Hydraulikflüssigkeit vorgesehen ist, die zur Umströmung der Förderpumpe (14, 16) und/oder zur Durchströmung der Wandung (18) vorgesehen ist.Pump unit (10) according to one of the preceding claims, characterized in that a cooling device (68) for cooling at least the part (58) of the hydraulic fluid is provided, which flows around the feed pump (14, 16) and / or to the flow through the wall ( 18) is provided. Pumpenaggregat (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Pumpenaggregat (10) als Doppelpumpenaggregat ausgebildet ist, wobei der Elektromotor (12) beidseitig jeweils ein Lagerschild und jeweils eine Förderpumpe aufweist.Pump unit (10) according to one of the preceding claims, characterized in that the pump unit (10) is designed as a double pump unit, wherein the electric motor (12) has on both sides in each case a bearing plate and in each case a feed pump.
EP05005006A 2004-03-10 2005-03-08 Pump unit Active EP1574714B1 (en)

Applications Claiming Priority (2)

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DE102004013053 2004-03-10
DE102004013053A DE102004013053B4 (en) 2004-03-10 2004-03-10 pump unit

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EP1574714A3 EP1574714A3 (en) 2006-05-03
EP1574714B1 EP1574714B1 (en) 2008-01-23

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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CN103590998A (en) * 2013-11-22 2014-02-19 北京机械设备研究所 Axial plunger hydraulic motor pump based on permanent-magnet synchronous motor
US9366114B2 (en) 2011-04-07 2016-06-14 Evolution Well Services, Llc Mobile, modular, electrically powered system for use in fracturing underground formations
WO2016100535A1 (en) * 2014-12-19 2016-06-23 Evolution Well Services, Llc Mobile electric power generation for hydraulic fracturing of subsurface geological formations
WO2017055145A1 (en) * 2015-10-02 2017-04-06 Robert Bosch Gmbh Electrohydraulic compact assembly
US10107084B2 (en) 2012-10-05 2018-10-23 Evolution Well Services System and method for dedicated electric source for use in fracturing underground formations using liquid petroleum gas
US10378326B2 (en) 2014-12-19 2019-08-13 Typhon Technology Solutions, Llc Mobile fracturing pump transport for hydraulic fracturing of subsurface geological formations
CN110469502A (en) * 2019-09-05 2019-11-19 兰州理工大学 A kind of non-oil-immersed type inside engaged gear electric-motor pump of air gap
US11255173B2 (en) 2011-04-07 2022-02-22 Typhon Technology Solutions, Llc Mobile, modular, electrically powered system for use in fracturing underground formations using liquid petroleum gas
US11293390B2 (en) * 2020-05-25 2022-04-05 Hyundai Motor Company Fuel pump for a liquid fuel injection system of a motor vehicle
US11708752B2 (en) 2011-04-07 2023-07-25 Typhon Technology Solutions (U.S.), Llc Multiple generator mobile electric powered fracturing system
US11955782B1 (en) 2022-11-01 2024-04-09 Typhon Technology Solutions (U.S.), Llc System and method for fracturing of underground formations using electric grid power

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US10774630B2 (en) 2011-04-07 2020-09-15 Typhon Technology Solutions, Llc Control system for electric fracturing operations
US11391136B2 (en) 2011-04-07 2022-07-19 Typhon Technology Solutions (U.S.), Llc Dual pump VFD controlled motor electric fracturing system
US9366114B2 (en) 2011-04-07 2016-06-14 Evolution Well Services, Llc Mobile, modular, electrically powered system for use in fracturing underground formations
US11939852B2 (en) 2011-04-07 2024-03-26 Typhon Technology Solutions (U.S.), Llc Dual pump VFD controlled motor electric fracturing system
US11913315B2 (en) 2011-04-07 2024-02-27 Typhon Technology Solutions (U.S.), Llc Fracturing blender system and method using liquid petroleum gas
US11708752B2 (en) 2011-04-07 2023-07-25 Typhon Technology Solutions (U.S.), Llc Multiple generator mobile electric powered fracturing system
US10718195B2 (en) 2011-04-07 2020-07-21 Typhon Technology Solutions, Llc Dual pump VFD controlled motor electric fracturing system
US11613979B2 (en) 2011-04-07 2023-03-28 Typhon Technology Solutions, Llc Mobile, modular, electrically powered system for use in fracturing underground formations using liquid petroleum gas
US10724353B2 (en) 2011-04-07 2020-07-28 Typhon Technology Solutions, Llc Dual pump VFD controlled system for electric fracturing operations
US10221668B2 (en) 2011-04-07 2019-03-05 Evolution Well Services, Llc Mobile, modular, electrically powered system for use in fracturing underground formations
US10227855B2 (en) 2011-04-07 2019-03-12 Evolution Well Services, Llc Mobile, modular, electrically powered system for use in fracturing underground formations
US11391133B2 (en) 2011-04-07 2022-07-19 Typhon Technology Solutions (U.S.), Llc Dual pump VFD controlled motor electric fracturing system
US11255173B2 (en) 2011-04-07 2022-02-22 Typhon Technology Solutions, Llc Mobile, modular, electrically powered system for use in fracturing underground formations using liquid petroleum gas
US11187069B2 (en) 2011-04-07 2021-11-30 Typhon Technology Solutions, Llc Multiple generator mobile electric powered fracturing system
US10502042B2 (en) 2011-04-07 2019-12-10 Typhon Technology Solutions, Llc Electric blender system, apparatus and method for use in fracturing underground formations using liquid petroleum gas
US10648312B2 (en) 2011-04-07 2020-05-12 Typhon Technology Solutions, Llc Dual pump trailer mounted electric fracturing system
US10689961B2 (en) 2011-04-07 2020-06-23 Typhon Technology Solutions, Llc Multiple generator mobile electric powered fracturing system
US11002125B2 (en) 2011-04-07 2021-05-11 Typhon Technology Solutions, Llc Control system for electric fracturing operations
US10982521B2 (en) 2011-04-07 2021-04-20 Typhon Technology Solutions, Llc Dual pump VFD controlled motor electric fracturing system
US10895138B2 (en) 2011-04-07 2021-01-19 Typhon Technology Solutions, Llc Multiple generator mobile electric powered fracturing system
US10718194B2 (en) 2011-04-07 2020-07-21 Typhon Technology Solutions, Llc Control system for electric fracturing operations
US10837270B2 (en) 2011-04-07 2020-11-17 Typhon Technology Solutions, Llc VFD controlled motor mobile electrically powered system for use in fracturing underground formations for electric fracturing operations
US10851634B2 (en) 2011-04-07 2020-12-01 Typhon Technology Solutions, Llc Dual pump mobile electrically powered system for use in fracturing underground formations
US10876386B2 (en) 2011-04-07 2020-12-29 Typhon Technology Solutions, Llc Dual pump trailer mounted electric fracturing system
WO2013107648A1 (en) * 2012-01-22 2013-07-25 Arburg Gmbh + Co. Kg Hydraulic device having a temperature-control device
US11118438B2 (en) 2012-10-05 2021-09-14 Typhon Technology Solutions, Llc Turbine driven electric fracturing system and method
US10107085B2 (en) 2012-10-05 2018-10-23 Evolution Well Services Electric blender system, apparatus and method for use in fracturing underground formations using liquid petroleum gas
US10107084B2 (en) 2012-10-05 2018-10-23 Evolution Well Services System and method for dedicated electric source for use in fracturing underground formations using liquid petroleum gas
CN103590998A (en) * 2013-11-22 2014-02-19 北京机械设备研究所 Axial plunger hydraulic motor pump based on permanent-magnet synchronous motor
US11168554B2 (en) 2014-12-19 2021-11-09 Typhon Technology Solutions, Llc Mobile fracturing pump transport for hydraulic fracturing of subsurface geological formations
US10374485B2 (en) 2014-12-19 2019-08-06 Typhon Technology Solutions, Llc Mobile electric power generation for hydraulic fracturing of subsurface geological formations
US10378326B2 (en) 2014-12-19 2019-08-13 Typhon Technology Solutions, Llc Mobile fracturing pump transport for hydraulic fracturing of subsurface geological formations
US9562420B2 (en) 2014-12-19 2017-02-07 Evolution Well Services, Llc Mobile electric power generation for hydraulic fracturing of subsurface geological formations
US9534473B2 (en) 2014-12-19 2017-01-03 Evolution Well Services, Llc Mobile electric power generation for hydraulic fracturing of subsurface geological formations
WO2016100535A1 (en) * 2014-12-19 2016-06-23 Evolution Well Services, Llc Mobile electric power generation for hydraulic fracturing of subsurface geological formations
WO2017055145A1 (en) * 2015-10-02 2017-04-06 Robert Bosch Gmbh Electrohydraulic compact assembly
CN110469502A (en) * 2019-09-05 2019-11-19 兰州理工大学 A kind of non-oil-immersed type inside engaged gear electric-motor pump of air gap
CN110469502B (en) * 2019-09-05 2021-04-13 兰州理工大学 Air gap non-oil-immersion type inner engaged gear motor pump
US11293390B2 (en) * 2020-05-25 2022-04-05 Hyundai Motor Company Fuel pump for a liquid fuel injection system of a motor vehicle
US11955782B1 (en) 2022-11-01 2024-04-09 Typhon Technology Solutions (U.S.), Llc System and method for fracturing of underground formations using electric grid power

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DE102004013053B4 (en) 2006-07-27
ATE384874T1 (en) 2008-02-15
EP1574714B1 (en) 2008-01-23
DE502005002603D1 (en) 2008-03-13
EP1574714A3 (en) 2006-05-03

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