US20040062664A1 - Pump driven by an electromotor and method for producing a pump of this type - Google Patents

Pump driven by an electromotor and method for producing a pump of this type Download PDF

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Publication number
US20040062664A1
US20040062664A1 US10/168,902 US16890203A US2004062664A1 US 20040062664 A1 US20040062664 A1 US 20040062664A1 US 16890203 A US16890203 A US 16890203A US 2004062664 A1 US2004062664 A1 US 2004062664A1
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US
United States
Prior art keywords
pump
stator
motor
wall
rotor
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.)
Abandoned
Application number
US10/168,902
Other languages
English (en)
Inventor
Thomas Weigold
Gerald Zierer
Johannes Pfetzer
Guenther Riehl
Matthias Henschel
Matthias Schmitz
Gerta Rocklage
Torsten Heidrich
Frank Melzer
Hansjuergen Linde
Uwe Neumann
Andreas Rehklau
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.)
Robert Bosch GmbH
Original Assignee
Individual
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7660955&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US20040062664(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Publication of US20040062664A1 publication Critical patent/US20040062664A1/en
Assigned to ROBERT BOSCH GMBH reassignment ROBERT BOSCH GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SCHMITZ, MATTHIAS, REHKLAU, ANDREAS, NEUMANN, UWE, LINDE, HANSJUERGEN, MELZER, FRANK, HEIDRICH, TORSTEN, HENSCHEL, MATTHIAS, ROCKLAGE, GERTA, RIEHL, GUENTHER, PFETZER, JOHANNES, ZIERER, GERALD, WEIGOLD, THOMAS
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606—Canned motor pumps
    • F04D13/064—Details of the magnetic circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606—Canned motor pumps
    • F04D13/0626—Details of the can
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0686—Mechanical details of the pump control unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5813—Cooling the control unit
    • 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
    • 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
    • F04C15/008—Prime movers

Definitions

  • the invention is based on a motor pump having a pump head and an electric motor that drives the pump head, as generically defined by the preamble to claim 1, and to a method for producing such a pump, as generically defined by the preamble to claim 20.
  • Such motor pumps serve to transport or increase the pressure of a fluid and have long been used, for instance as water pumps in heating circuits.
  • a pump-motor unit which acts as a coolant pump of a motor vehicle internal combustion engine.
  • the pump-motor unit described in EP-0 778 649 B1 is a centrifugal pump, which is driven by an electronically commutated direct-current motor.
  • the centrifugal pump and the direct-current motor are connected to one another via a radiator.
  • a split pot Fastened between the pump housing and the radiator is a split pot, made of a suitable material, which separates the rotor of the electric motor from the stator.
  • a seal placed between the pump housing and the split pot seals off the fluid-filled rotor chamber from an outer stator chamber.
  • a split tube motor for pumps is disclosed, with a split pot disposed between the rotor and the stator.
  • the rotor has a thin-walled, sleevelike and in particular laminated base body. On its outside, this base body has radially oriented ribs, which carry the stator winding, and with its cylindrical inside, it rests at least partly on the outside of the split tube.
  • the complex assembly and sealing of the additional split pot is a disadvantage.
  • the split tube must be built in and sealed off between the stator packet and the rotor.
  • the open- and closed-loop control electronics of the split tube motor of EP-0 713 282 is embodied as a module and requires complicated cooling.
  • the electronic module rests with one side of its housing by positive engagement on the stator winding.
  • the heat energy generated by the electronics is given off via the switch housing to the motor housing, with the stator winding located inside it.
  • the stator winding in turn gives up the heat energy it has absorbed to the pumping medium via the split pot.
  • the pump of the invention having the characteristics of claim 1 has the advantage that in a simple way, it becomes possible to seal off the rotor chamber, which is open toward the pumping medium, from the stator chamber, and good cooling of the electronics of the pump motor is achieved as well.
  • the sealing wall of the split pot belongs directly to the stator, it is possible to dispense with a split tube as an additional component.
  • the assembly step of introducing the split tube between the stator and the rotor is dispensed with, leading to a corresponding simplification and cost reduction for the production of the pump of the invention.
  • One advantageous feature of the pump of the invention is obtained by providing that the pump head, the electric motor driving this pump head, and an electronic switch mechanism that serves to control the electric motor are disposed in common in a housing.
  • This housing can be a one-piece housing or can comprise multiple components that are to be associated with the various functions (pump, motor, switch mechanism) and are connected to one another.
  • the motor housing can thus be used simultaneously as a housing part and as a radiator for the electronics.
  • a wall embodied integrally with the motor housing lends the pump of the invention the requisite mechanical stability and can at the same time contribute to sealing off the rotor chamber.
  • this wall can be produced of metal, which has advantages in terms of strength and heat transfer. In principle, it is thus possible to use only a single metal part for the pump housing of the pump of the invention, which makes for a marked cost reduction for such a pump.
  • this sealing wall can be embodied as a casing of the stator that is completely closed in the circumferential direction of the rotor chamber.
  • This casing of the stator can advantageous be produced from plastic or some other suitable material.
  • Encasing the stator with a plastic furthermore offers the advantage that the stator pole teeth, which can for instance be formed by discrete sheet-metal lamination packets, can simply and advantageously be injected directly into the plastic and thus fixed.
  • the sealing element between the rotor chamber and the stator chamber it is furthermore possible for the sealing element between the rotor chamber and the stator chamber to be assigned a number of additional functions, which a separate split tube in its original sense cannot perform.
  • the stator lamination packets can be secured by the injection and for instance secured against rotation. This means a simple, secure fixation of the lamination packets.
  • the spray-coated stator also makes it possible for the requisite winding bodies of the stator winding to be jointly embodied directly in the injection-molding process.
  • Contact pockets required for connecting the stator winding can accordingly, like other required retaining means on the stator, advantageously be formed directly in the injection molding process. All of this makes the structure and sealing of the stator simpler, reduces the number of components, and thus facilitates the assembly of the pump of the invention. With a split tube pump of the conventional design, this is not feasible.
  • stator is connected to a motor housing wall, in particular a metal wall, then this wall can absorb the incident forces and moments.
  • This metal wall because of its thermal conductivity, can then also expediently be used directly as a radiator for the electronics of the pump motor. Good cooling of the electronic switch elements is obtained if these elements are mounted directly on the metal wall.
  • a heat conduction foil can optionally be placed between the component and the radiator as well. It is conceivable for the power components of the electronics to be pressed against the cooling surface by way of springs, or to be coupled thermally directly with the cooling surface via an electrically insulating adhesive. This assures good heat transfer from the power component of the electronics into the metal motor housing.
  • a further marked improvement in cooling of the elements of the control electronics can be attained if the metal cooling wall is in turn additionally cooled actively.
  • some of the fluid to be pumped is therefore carried past the cooling wall toward the motor.
  • Such cooling is possible because the expected coolant temperatures of the internal combustion engine come to be below the ambient temperatures.
  • an opening on the compression side is provided in the pump head; via a conduit in the common shaft of the electric motor, this opening together with the pump wheel creates a communication with the intake side of the pump.
  • the full pressure difference of the pump is applied, so that a secondary flow of the fluid to be pumped, which is moved precisely past the cooling face of the motor housing, has been achieved.
  • the electric motor is disposed between the switch mechanism having the power electronics and the pump head.
  • FIG. 1 a longitudinal section through an electric-motor-driven pump of the invention
  • FIG. 2 a cross section through the stator of the electric motor of the electric-motor-driven pump of the invention.
  • FIG. 3 a detail of the stator of the electric-motor-driven pump of the invention.
  • an electric-motor-driven pump 10 of the invention comprises a pump head 12 , which is driven by a brushless, electronically commutated electric motor 14 , and a switch mechanism 16 for controlling the electric motor 14 .
  • the pump head 12 has a pump housing 18 , in which an impeller 22 , secured to a drive shaft 20 , is located in a pump chamber 11 .
  • the impeller 22 is provided with vanes 24 for transporting and increasing the pressure of a fluid to be recirculated.
  • An opening 26 for aspirating the fluid in the direction of the arrow 28 leads into the pump housing 18 .
  • the pump housing also has an outlet opening 30 , not completely shown in FIG. 1, on the compression side of the pump.
  • the intake opening 26 discharges at the vanes 24 of the impeller 22 of the pump 10 .
  • the pump housing 18 is connected via a flange 32 to the motor housing 34 and sealed off via an O-ring 36 , which is located between the two housing parts.
  • O-ring 36 is located between the two housing parts.
  • the electric motor 14 of the pump 10 of the invention has a rotor 38 , disposed in the motor housing 34 , and a stator 40 , radially surrounding the rotor 38 .
  • the stator 40 comprises a plastic carrier part 42 , into which a plurality of soft iron teeth 44 forming the stator poles are injected directly. These soft iron teeth are embodied for instance in the form of sheet-metal lamination packets 46 —as suggested in FIG. 1.
  • FIG. 2 shows a cross section through the stator 40 .
  • the plastic carrier part 42 and the pole teeth 44 injected into it can be seen.
  • the plastic carrier part 42 on its inside 48 oriented toward the rotor 38 (not shown in FIG. 2 for the sake of simplicity), forms a completely closed plastic casing 50 of the stator 40 .
  • the plastic casing 50 is designed such that it seals off the rotor 38 located on the inside, that is, in the interstice 52 of the plastic carrier part 42 , from the stator 40 .
  • the plastic casing 50 of the stator pole teeth 44 serves not only as a sealing wall 51 for the stator but also as a carrier form and winding body 54 for the windings 56 of the stator coils 58 .
  • FIG. 3 in a detail shows one possible embodiment of the carrier form 54 for the windings 56 of the stator 40 .
  • the plastic casing 50 of the pole teeth 44 is shaped such that a stable receptacle is obtained for the windings 56 of the coil 58 .
  • Additional contact pockets 60 for the winding wire 62 can—as shown in FIG. 3—be formed—just like other required retaining means—directly on the plastic carrier part 42 of the stator 40 by a shaping process.
  • the stator 40 with its plastic carrier part 42 is secured in the axial direction, in a manner fixed against rotation, on one wall 64 of the motor housing 34 and is additionally sealed off from the motor housing 34 via sealing elements 66 .
  • the wall 64 , remote from the pump head 12 , of the motor housing 34 is embodied, in the exemplary embodiment shown, integrally with the motor housing 34 and has a plurality of retainers—embodied in this exemplary embodiment as pegs 68 —for fixation of the stator 40 .
  • the housing wall 64 furthermore has a number of leadthroughs 70 for one or more electrical connections 72 connecting the electric motor 14 to the switch mechanism 16 .
  • the housing wall 64 can preferably—like the motor housing 34 —be made of metal, so as to better absorb the forces and moments of the motor and to guarantee a secure fastening of the stator 40 .
  • a metal wall is an attractive option for the cooling wall 65 .
  • the housing wall 64 additionally has a retainer 74 —embodied integrally in the exemplary embodiment—into which a first bearing 76 of the motor shaft 20 is placed.
  • the interior 52 , encased by the plastic carrier part 42 , of the stator 40 and the correspondingly covered region of the housing wall 64 of the motor housing 34 form a cup-shaped chamber 78 , in which the rotor 38 of the electric motor 14 rotates.
  • the rotor 38 is seated firmly on a shaft, which in this exemplary embodiment is also the drive shaft 20 of the pump impeller 22 .
  • the rotor 38 has permanent magnets 80 in the axial direction, which are distributed uniformly over its entire circumference.
  • the cup-shaped chamber 78 forming a rotor chamber 82 is precisely large enough radially that the parts of the rotor remote from the axis revolve in the immediate vicinity of the inside 48 of the plastic casing 50 of the stator 40 but do not touch it.
  • the plastic casing 50 of the invention on the stator 40 it is possible for the gap between the stator and the rotor 38 of the electric motor 14 to be kept very slight.
  • the rotor chamber 82 is closed off by a wall 84 and sealing elements 86 .
  • the wall 84 of the rotor chamber 82 carries a second bearing 88 for the drive shaft 20 of the pump 10 .
  • the wall 84 toward the pump head has an opening 90 toward the compression side of the pump 10 .
  • the switch mechanism 16 for controlling and regulating the pump 10 of the invention is located on the side of the motor housing 34 remote from the pump head 12 .
  • the switch mechanism 16 is joined integrally to the motor housing 34 and advantageously shares the housing wall 64 with it.
  • power elements 96 of the switch electronics 98 of the electric motor 14 are secured on the side of the housing wall 64 remote from the motor 14 .
  • These power elements 96 which can for instance be transistors, are mounted directly on the housing wall 64 , in this exemplary embodiment, resulting in good thermal conductivity between these electrical components of the switch mechanism 16 and the wall 64 .
  • the heat produced by the electronics 98 can be given up quickly to the housing wall 64 —which in the exemplary embodiment is of metal.
  • the housing wall 64 is furthermore bathed at least in part, toward the motor, by the fluid to be recirculated, so that according to the invention, a substantially improved heat dissipation is obtained for the components of the switch mechanism 16 .
  • the switch mechanism 16 itself is to be closed via a lid 100 , which in the exemplary embodiment is mounted directly on the motor housing 34 of the pump 10 .
  • the lid 100 can be slipped on, screwed on, riveted, adhesively bonded, or fastened securely and optionally reversibly by some other suitable technique to the motor housing 34 .
  • the lid 100 of the switch mechanism 16 has a terminal 102 for externally supplying voltage to the motor pump 10 of the invention.
  • the invention is not limited to the exemplary embodiment of an electric-motor-driven pump described.
  • a sealing wall joined integrally to the stator can advantageously be employed as well.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Motor Or Generator Frames (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
US10/168,902 2000-10-25 2001-09-20 Pump driven by an electromotor and method for producing a pump of this type Abandoned US20040062664A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10052797A DE10052797A1 (de) 2000-10-25 2000-10-25 Elektromotorisch angetriebene Pumpe und Verfahren zur Herstellung einer solchen Pumpe
DE10052797.3 2000-10-25
PCT/DE2001/003624 WO2002035098A1 (fr) 2000-10-25 2001-09-20 Pompe commandee par un moteur electrique et procede de production d'une telle pompe

Publications (1)

Publication Number Publication Date
US20040062664A1 true US20040062664A1 (en) 2004-04-01

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ID=7660955

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/168,902 Abandoned US20040062664A1 (en) 2000-10-25 2001-09-20 Pump driven by an electromotor and method for producing a pump of this type

Country Status (7)

Country Link
US (1) US20040062664A1 (fr)
EP (1) EP1328731B1 (fr)
JP (1) JP2004512462A (fr)
KR (1) KR20020064360A (fr)
DE (2) DE10052797A1 (fr)
ES (1) ES2305115T3 (fr)
WO (1) WO2002035098A1 (fr)

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CN109026682A (zh) * 2018-09-11 2018-12-18 江阴爱尔姆真空设备有限公司 一种转子的新型结构及其制造工艺
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DE102021108178A1 (de) 2021-03-31 2022-10-06 HELLA GmbH & Co. KGaA Stator für einen Motor einer Pumpe, Motor mit diesem Stator und Pumpe mit diesem Motor
EP4374077A1 (fr) 2021-07-21 2024-05-29 Pierburg Pump Technology GmbH Pompe à liquide à canal latéral électrique de véhicule automobile dotée d'un refroidissement par moteur
DE102022205009A1 (de) 2022-05-19 2023-11-23 Robert Bosch Gesellschaft mit beschränkter Haftung Pumpenvorrichtung und Pumpe

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ES2305115T3 (es) 2008-11-01
DE10052797A1 (de) 2002-05-08
EP1328731A1 (fr) 2003-07-23
KR20020064360A (ko) 2002-08-07
JP2004512462A (ja) 2004-04-22
DE50114041D1 (de) 2008-07-31
WO2002035098A1 (fr) 2002-05-02

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