WO2012007395A2 - Groupe pompe - Google Patents

Groupe pompe Download PDF

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Publication number
WO2012007395A2
WO2012007395A2 PCT/EP2011/061670 EP2011061670W WO2012007395A2 WO 2012007395 A2 WO2012007395 A2 WO 2012007395A2 EP 2011061670 W EP2011061670 W EP 2011061670W WO 2012007395 A2 WO2012007395 A2 WO 2012007395A2
Authority
WO
WIPO (PCT)
Prior art keywords
pump
drive shaft
rotor
shaft
electric motor
Prior art date
Application number
PCT/EP2011/061670
Other languages
German (de)
English (en)
Other versions
WO2012007395A3 (fr
Inventor
Frank Gutjahr
Siegfried Mann
Magnus Junginger
Gerhard Faehnle
Original Assignee
Voith Patent Gmbh
Baumüller Nürnberg GmbH
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 Voith Patent Gmbh, Baumüller Nürnberg GmbH filed Critical Voith Patent Gmbh
Publication of WO2012007395A2 publication Critical patent/WO2012007395A2/fr
Publication of WO2012007395A3 publication Critical patent/WO2012007395A3/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/02—Arrangements of bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/008—Enclosed motor pump units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F04C15/0073—Couplings between rotors and input or output shafts acting by interengaging or mating parts, i.e. positive coupling of rotor and shaft

Definitions

  • the invention relates to a pump unit with an electric motor and at least one feed pump for conveying hydraulic fluid.
  • a pump rotor of the at least one feed pump can be driven by a drive shaft of the electric motor.
  • an at least partially torsionally elastic coupling in particular a metal bellows coupling or a dog clutch and / or a gear is usually provided between the drive shaft of the electric motor and the pump rotor of the feed pump.
  • the present invention has the object to provide a pump unit with improved control behavior.
  • the invention has the advantage that due to, in particular the torsion-resistant drive of the pump rotor, compared to an embodiment of a pump unit with a transmission no or at least largely no play exists and the connection is substantially torsionally rigid than when using prior art elastic couplings. This results in advantages in terms of the control behavior of the feed pump, for example by associated control circuits.
  • the construction of the torsionally rigid drive makes it possible to significantly reduce the space requirement, noise, and the parts and installation effort of the pump set.
  • the torsion-free drive of the pump rotor by means of the drive shaft is characterized in that at a constant force of the drive shaft in the pump shaft or vice versa substantially the same angular velocity of the drive shaft and the pump shaft is guaranteed, that is a backlash-free or at least largely play-free coupling the drive shaft is present with the pump shaft.
  • controlled synchronous or asynchronous motors come into consideration as electric motors.
  • feed pumps come into consideration as feed pumps, which are not adjustable in their flow and therefore rely on controllable drives.
  • a suitable controllability then results from the coupling of non-adjustable pumps with controllable drives, wherein the dynamics and control quality of this combination results from the fact that the pump rotor by means of the drive shaft is driven torsionally rigid.
  • the pump rotor is arranged on a pump shaft and the pump shaft can be driven torsionally rigid with the drive shaft.
  • the pump shaft and the drive shaft can be pre-assembled independently of each other and combined in a further assembly step such that the pump shaft is torsionally connected to the drive shaft.
  • a corresponding repair can be performed without the drive shaft or the pump shaft must be removed for this purpose.
  • the drive shaft has an abutment portion
  • the pump shaft has a counter portion corresponding to the abutment portion and the counter portion of the pump shaft cooperates with the abutment portion of the drive shaft such that torque can be introduced from the motor shaft directly into the pump shaft
  • the contact section or the counterpart section can be formed as a transverse groove or as a transverse web. This is advantageously achieved that the torque can be introduced in a simple manner without high component costs of the drive shaft directly into the pump shaft.
  • the pump unit connects a rigid coupling, in particular a frictional coupling or a shaft-hub connection, the drive shaft and the pump shaft such that the torque can be introduced from the drive shaft via the coupling in the pump shaft.
  • the rigid coupling has the advantage that a torsionally rigid connection between the drive shaft and the pump shaft is created in a simple manner.
  • the pump rotor is arranged directly on the drive shaft. This results in the advantage that only one shaft, the drive shaft is provided for direct connection of the rotor of the electric motor and the pump rotor of the feed pump and thus the number of components that are associated with leading to an undesirable clearance tolerance is reduced.
  • the drive shaft and / or the pump shaft is free of bearings between the rotor of the electric motor and the pump rotor.
  • the space can be reduced. Also possible sources of error, such as the wear of a bearing, minimized.
  • a bearing for supporting the drive shaft and / or the pump shaft is arranged adjacent to the contact section and / or adjacent to the counter section and / or adjacent to the rigid coupling.
  • the bearing is arranged directly adjacent to the contact section and / or to the counter section and / or to the coupling.
  • the abovementioned bearing is arranged directly adjacent to the rotor of the electric motor and / or the pump rotor of the at least one feed pump. This results in the further advantage that the movement of the drive shaft and / or the pump shaft is limited in both longitudinal directions.
  • FIGS. 1 to 3 schematic sections of longitudinal sections of various pump units.
  • Figure 1 shows a schematic section of a longitudinal section of a pump unit 2 along a rotation axis 8.
  • a drive shaft 12 of an electric motor, not shown, and a pump shaft 14 of a feed pump not shown are arranged.
  • the drive shaft 12 and the pump shaft 14 are connected via a fixed coupling 24 such that the pump shaft 14 is driven by the drive shaft 12 torsionally rigid.
  • the drive shaft 12 and the pump shaft 14 thus form a torsionally rigid connection.
  • the drive shaft 12 and / or the pump shaft 14 has a rotational degrees of freedom which is determined by bearings 26, 28 and 32.
  • the drive shaft 12 and the rotor shaft 14 can perform a self-rotation about the rotation axis 8 in one of two directions of rotation.
  • a rotor 18 of an electric motor Adjacent to the bearing 26, a rotor 18 of an electric motor is fixedly connected to the drive shaft 12.
  • the rotor may comprise, for example, a rotor winding of the electric motor.
  • Adjacent to the rotor 18 is the region of the transition from the drive shaft 12 to the pump shaft 14. In this area is also the clutch 24.
  • Adjacent to the clutch 24 is the bearing 32.
  • Adjacent to the bearing 32 is a pump rotor 22 of a feed pump, wherein the pump rotor 22 is fixedly connected to the pump shaft 14. Between the rotor 18 and the coupling 24 or between the rotor 18 and the bearing 32, the drive shaft 12 and the pump shaft 14 is free of bearings.
  • the pump rotor 22 is designed here as a gear.
  • the feed pump may be, for example, a gear pump, a vane pump, a rotary pump or another pump. According to the pump type, the pump rotor 22 may also be designed differently. Adjacent to the pump rotor 22 is the bearing 28.
  • the electric motor further comprises a stator, not shown.
  • the feed pump includes the respective type according to other components not shown.
  • the drive shaft 12 or the rotor shaft 14 can each have an abutment section or a countersection corresponding to the abutment section on the convergent end faces.
  • the countersection of the pump shaft 14 cooperates with the abutment section of the drive shaft 12 in such a way that a torque can be introduced from the drive shaft 12 directly into the pump shaft 14.
  • FIG. 2 essentially corresponds to FIG. 1. Unlike FIG. 1, instead of a bearing 32 provided between the coupling 24 and the pump rotor 22, a bearing 34 is provided between the rotor 18 and the coupling 24.
  • the rotor 18 of the electric motor Adjacent to the bearing 26, the rotor 18 of the electric motor is arranged and fixedly connected to the drive shaft 12. Directly adjacent to the rotor 18, a bearing 34 is arranged, wherein the bearing 34 with respect to the rotor 18 is located on the opposite side of the bearing 26. Directly adjacent to the bearing 34 is the coupling 24. Thus, the rotor 18, the bearing 34 and the coupling 24 are directly adjacent.
  • the coupling 24 connects, as in FIG. 1, the drive shaft 12 to the pump shaft 14. Between the coupling 24 and the pump rotor 22 or between the bearing 34 and the pump rotor 22, the drive shaft 12 or the pump shaft 14 is free of bearings.
  • Adjacent to the coupling 24 is the pump rotor 22.
  • the pump rotor 22 is frictionally or positively connected to the pump shaft 14 as in FIG.
  • Adjacent to the pump rotor 22 is the bearing 28, which is provided for mounting the pump shaft 14.
  • Figure 3 shows, unlike in Figures 1 and 2, an elongated, integrally formed drive shaft 12, on which the pump rotor 22 is fixedly mounted.
  • the rotor 18 of the electric motor and the pump rotor 22 of the feed pump are arranged.
  • the bearing 26 is located on the side facing away from the pump rotor 22 of the rotor 18.
  • the bearing 28 is located on the rotor 18 side facing away from the pump rotor 22.
  • the drive shaft 12 is free of bearings.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

Groupe pompe (2) comportant un moteur électrique et au moins une pompe de refoulement pour refouler un liquide hydraulique. Le moteur électrique comporte un arbre d'entraînement (12). La ou les pompes de refoulement comportent un rotor de pompe (22) pouvant être entraîné par l'arbre d'entraînement (12). Selon l'invention, l'arbre d'entraînement (12) et le rotor de pompe (22) sont disposés de façon que le rotor de pompe (22) puisse être entraîné par l'arbre d'entraînement (12) de manière rigide en torsion.
PCT/EP2011/061670 2010-07-16 2011-07-08 Groupe pompe WO2012007395A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102010031494 2010-07-16
DE102010031494.3 2010-07-16
DE201110075278 DE102011075278A1 (de) 2010-07-16 2011-05-05 Pumpenaggregat
DE102011075278.1 2011-05-05

Publications (2)

Publication Number Publication Date
WO2012007395A2 true WO2012007395A2 (fr) 2012-01-19
WO2012007395A3 WO2012007395A3 (fr) 2012-11-08

Family

ID=44628797

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/061670 WO2012007395A2 (fr) 2010-07-16 2011-07-08 Groupe pompe

Country Status (2)

Country Link
DE (1) DE102011075278A1 (fr)
WO (1) WO2012007395A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014001138A3 (fr) * 2012-06-29 2014-05-15 Robert Bosch Gmbh Pompe à engrenage
DE102013011900A1 (de) * 2013-07-17 2015-01-22 Voith Patent Gmbh Kupplung mit flexiblem Element

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4002029A (en) * 1975-09-22 1977-01-11 Towmotor Corporation Pump motor combination for hydraulic treatment
DE50208947D1 (de) * 2002-02-27 2007-01-25 Siemens Ag Motor-Pumpen-Aggregat, insbesondere für eine Kraftfahrzeug-Bremsvorrichtung
JP4475391B2 (ja) * 2004-02-16 2010-06-09 株式会社ジェイテクト 電動ポンプユニット
DE102008063983A1 (de) * 2008-12-19 2010-07-01 Dürr Systems GmbH Pumpe zum Fördern eines Fluids, insbesondere Dosierpumpe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014001138A3 (fr) * 2012-06-29 2014-05-15 Robert Bosch Gmbh Pompe à engrenage
DE102013011900A1 (de) * 2013-07-17 2015-01-22 Voith Patent Gmbh Kupplung mit flexiblem Element
DE102013011900B4 (de) * 2013-07-17 2019-04-04 Voith Patent Gmbh Kupplung mit flexiblem Element

Also Published As

Publication number Publication date
DE102011075278A1 (de) 2012-02-23
WO2012007395A3 (fr) 2012-11-08

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