EP2273123B9 - Sécurisation d'une roue de pompe centrifuge - Google Patents

Sécurisation d'une roue de pompe centrifuge Download PDF

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Publication number
EP2273123B9
EP2273123B9 EP09164927.7A EP09164927A EP2273123B9 EP 2273123 B9 EP2273123 B9 EP 2273123B9 EP 09164927 A EP09164927 A EP 09164927A EP 2273123 B9 EP2273123 B9 EP 2273123B9
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EP
European Patent Office
Prior art keywords
rotor
pump
stop ring
rotor axis
coolant pump
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.)
Active
Application number
EP09164927.7A
Other languages
German (de)
English (en)
Other versions
EP2273123A1 (fr
EP2273123B1 (fr
Inventor
Jens Teubel
Rene Geinitz
Ronald Rathke
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.)
Pierburg Pump Technology GmbH
Original Assignee
Pierburg Pump Technology 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
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Application filed by Pierburg Pump Technology GmbH filed Critical Pierburg Pump Technology GmbH
Priority to EP09164927.7A priority Critical patent/EP2273123B9/fr
Publication of EP2273123A1 publication Critical patent/EP2273123A1/fr
Publication of EP2273123B1 publication Critical patent/EP2273123B1/fr
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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
    • F04D13/0606—Canned motor pumps
    • F04D13/0633—Details of the bearings
    • 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
    • F04D13/0673—Units comprising pumps and their driving means the pump being electrically driven the motor being of the inside-out type
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/041—Axial thrust balancing
    • F04D29/0413—Axial thrust balancing hydrostatic; hydrodynamic thrust bearings
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • F04D29/047—Bearings hydrostatic; hydrodynamic

Definitions

  • the invention relates to an electrically driven motor vehicle coolant pump for a motor vehicle driven by an internal combustion engine, wherein the coolant pump has a motor housing and a containment shell.
  • DE 44 11 960 C2 discloses a coolant pump for a motor vehicle internal combustion engine, in which a rotor axis is mounted at one end centrally in an end face of a plastic containment shell.
  • a pump rotor On the rotor axis, a pump rotor is arranged, which is axially fixed at the distal end of the rotor axis by means of a thrust washer and with a introduced into a circumferential groove stop ring, in the form of a spring ring.
  • the stop ring must be introduced radially into the circumferential groove.
  • it is necessary that the pump rotor must be rotationally aligned before mounting the stop ring, so that the stop ring mounting device can reach through between the pump blades.
  • this type of stop ring assembly is not possible for reasons of space. The exact position of the stop ring and its holding force can only be checked consuming, which complicates a fully automatic assembly.
  • stop ring is pulled axially to the circumferential groove on the rotor axis.
  • this type of fixation can only be realized using high assembly forces, since the stop ring must be stretched considerably radially.
  • the stop ring must have a certain strength to a sufficient Apply holding force.
  • the stop ring must have a certain elasticity in order to be able to be sunk in the groove.
  • stop rings are used with a typical axial thickness of 3/10 mm.
  • the stop ring is subject in operation wear in the form of material removal, which is significantly enhanced by foreign bodies in the coolant, and eventually can lead to premature failure of the pump by breaking the stop ring.
  • the object of the invention is in contrast to provide an electric cardenilttelpumpe, which allows a simple and inexpensive installation of the rotor on the rotor axis and ensures a long life.
  • the coolant pump according to the invention has a split-pot motor arrangement, with a pump rotor with pump blades, which is mounted by a sliding bearing on a fixed metallic rotor axis.
  • the pump blades of the pump rotor are arranged axially in the region of a plain bearing sleeve and are fixed with a metallic stop ring at the distal end of the metallic rotor axis, wherein the metallic stop ring is welded to the metallic rotor axis.
  • the stop ring may preferably be formed as a closed or open stop ring, and before the fixation, which is carried out by means of a welding process, are mounted.
  • the stop ring has an axial thickness of at least 0.9 mm. This material thickness, in contrast to conventional stop rings, which ideally have a typical axial thickness of 3/10 mm, a higher resistance to wear in the form of material removal, which is significantly enhanced by foreign bodies in the coolant on.
  • the combination of axial strength of the stop ring and the fixation by welding on the rotor axis leads to an additional backup in case of breakage of the stop ring. Due to the welding of the stop ring remains despite a break at least partially on the rotor axis, so that the rotor body remains positioned on the rotor axis.
  • the plain bearing sleeve is positively injected into the rotor body, wherein the plain bearing sleeve forms a thrust bearing with the stop ring.
  • the electric motor vehicle coolant pump has an axial gap between the rotor body and the stop ring, which is at least 0.5 mm.
  • the electric vehicle coolant pump has a metallic stop ring, which is preferably fixed by laser welding to the rotor axis.
  • laser welding a focused laser beam is directed at the joint to be machined.
  • a targeted heat transfer which leads to a lower distortion of the material.
  • higher welding speeds can be achieved because the laser welding process is fully automated.
  • the metallic axial rotor axis is rotatably and positively inserted into the containment shell.
  • the electric vehicle coolant pump preferably has a structure, wherein a single housing made of plastic is provided for the pump rotor and the motor rotor, which is produced in one piece by means of an injection molding process.
  • the electric vehicle coolant pump preferably has a housing and a containment shell, which are formed as a one-piece component.
  • Fig. 1 shows a coolant pump 10 in longitudinal section.
  • the coolant pump 10 has a plastic housing 12, which is integrally formed, wherein the inner cup-shaped part forms the containment shell 14, which consists of a circular disk-shaped End wall 16 and a cylindrical side wall 18 is made.
  • a metallic rotor axis 26 is embedded with its one end in a form-fitting axial alignment by an injection molding process in the end wall 14.
  • a pump rotor 20 which has an embedded in the pump rotor 20 plain bearing sleeve 22 which forms the sliding bearing 24 together with the rotor axis 26.
  • the plastic pump rotor 20 has pumping blades 50 arranged axially in the region of the metal plain bearing sleeve 22.
  • the pump rotor 20 consists of a one-piece plastic body and has a plurality of embedded permanent magnets in a cylindrical motor rotor 23, so that a multi-pole magnetization of the motor rotor 23 is present.
  • the motor rotor 23 is entrained by the rotational magnetic field generated in the magnetic coils 60 and rotated.
  • the free end of the rotor axis 26 of the pump rotor 20 is fixed by means of a closed stop ring 40 in axial alignment, with an axial gap 28 of 0.5 mm to the pump rotor 20 remains.
  • the attachment of the stop ring 40 takes place on the rotor axis 26 through a weld point 42.
  • the weld point 42 is set on the stop ring 40, which has an axial thickness of at least 0.9 mm, by laser welding.
  • the assembly of the coolant pump 10 takes place from the free end of the rotor axis 26, wherein the component 11, consisting of the housing 12 and the can 14, and the rotor shaft 26 arranged fixedly can have a vertical or horizontal orientation.
  • the pump rotor 20 is positioned above the component 11 and the rotor axis 26, wherein the pump rotor 20 is deposited by gravity on the rotor axis 26.
  • the pump rotor 20 When mounted horizontally, the pump rotor 20 is axially aligned on the rotor axis 26 due to the axial magnetic forces acting between the motor rotor 23 and the solenoids 60.
  • the stop ring 40 is pulled over the rotor axis 26 in the axial direction until it stops against the pump rotor 20. Subsequently, by means of a device, an axial displacement of the pump rotor 20 on the rotor axis 26 is performed, by which a defined axial gap 28 is formed to the stop ring 42. This made displacement of the pump rotor 20 and the stop ring 42 on the rotor axis 26 is maintained until the fixation of the stop ring 42 with the rotor axis 26 by means of a welding process, which leads to the formation of a welding point 42 through the device.
  • the gap between the rotor axis 26 and the stop ring 42 is at least 0.5 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (7)

  1. Pompe à réfrigérant (10) électrique pour le refroidissement d'un moteur à combustion interne de véhicule, comprenant
    un agencement manchon d'entrefer/moteur,
    un rotor de pompe (20) avec aubes de pompe (50) et un coussinet de palier lisse (22) supporté sur un axe de rotor (26) fixe en métal, les aubes de pompe (50) dudit rotor de pompe (20) étant disposés axialement dans la région du coussinet de palie lisse (22), et
    une bague de butée (40) métallique à l'extrémité distale de l'axe de rotor (26).
    caractérisée en ce que
    la bague de butée (40) a une épaisseur axiale d'au moins 0,9 mm, et
    la bague de butée (40) est soudée à l'axe de rotor (26).
  2. Pompe à réfrigérant (10) électrique selon la revendication 1, dans laquelle le coussinet de palier lisse (22) est moulé par injection, de manière positive; dans un corps de rotor (21) comportant les aubes de pompe (50)
  3. Pompe à réfrigérant (10) électrique selon la revendication 1 ou 2, dans laquelle une fente (28) axiale entre le corps de rotor (21) et la bague de butée (40) présent une largeur de fente d'au moins 0.5 mm.
  4. Pompe à réfrigérant (10) électrique selon l'une quelconque des revendications précédentes, dans laquelle la bague de butée (40) métallique est fixée sur l'axe de rotor (26) par soudage à laser.
  5. Pompe à réfrigérant (10) électrique selon l'une quelconque des revendications précédentes, dans laquelle l'axe de rotor (26) axial métallique est inséré de manière positive dans un manchon d'entrefer (14) pour tourner avec celui-ci.
  6. Pompe à réfrigérant (10) électrique selon l'une quelconque des revendications précédentes, dans laquelle un seul carter (12) en matière plastique est prévu pour le rotor de pompe (20) et le rotor de moteur (23), le carter étant fabriqué en une seule pièce par un procédé de moulage par injection.
  7. Pompe à réfrigérant (10) électrique selon la revendication 6, dans laquelle le carter (12) et le manchon d'entrefer (14) forment un composant (11) formé en une seule pièce.
EP09164927.7A 2009-07-08 2009-07-08 Sécurisation d'une roue de pompe centrifuge Active EP2273123B9 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09164927.7A EP2273123B9 (fr) 2009-07-08 2009-07-08 Sécurisation d'une roue de pompe centrifuge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09164927.7A EP2273123B9 (fr) 2009-07-08 2009-07-08 Sécurisation d'une roue de pompe centrifuge

Publications (3)

Publication Number Publication Date
EP2273123A1 EP2273123A1 (fr) 2011-01-12
EP2273123B1 EP2273123B1 (fr) 2016-10-05
EP2273123B9 true EP2273123B9 (fr) 2018-03-21

Family

ID=41396455

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09164927.7A Active EP2273123B9 (fr) 2009-07-08 2009-07-08 Sécurisation d'une roue de pompe centrifuge

Country Status (1)

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EP (1) EP2273123B9 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011079226B4 (de) * 2011-07-15 2014-12-24 Bühler Motor GmbH Flüssigkeitspumpe, insbesondere Wasserpumpe
DE102013221245A1 (de) * 2013-10-21 2015-04-23 Volkswagen Aktiengesellschaft Nassläuferpumpe
CN103790835B (zh) * 2014-01-14 2017-01-18 苏州泰格动力机器有限公司 一体水套式永磁电机水泵
EP3114351B1 (fr) * 2014-03-06 2020-05-06 Pierburg Pump Technology GmbH Pompe à liquide électrique pour automobile
EP3006742B1 (fr) 2014-10-08 2021-12-01 Pierburg Pump Technology GmbH Pompe électrique à liquide de refroidissement pour véhicule automobile
CN105715559A (zh) * 2014-12-05 2016-06-29 杭州三花研究院有限公司 电子泵
CN106194823B (zh) * 2015-04-30 2020-03-24 浙江三花汽车零部件有限公司 离心泵
CN106194756B (zh) * 2015-04-30 2020-02-14 浙江三花汽车零部件有限公司 离心泵制造方法
US10584705B2 (en) 2015-04-30 2020-03-10 Zhejiang Sanhua Automotive Components Co., Ltd. Centrifugal pump and method for manufacturing the same
CN106286378B (zh) * 2015-05-20 2020-12-01 浙江三花汽车零部件有限公司 离心泵
DE102020126720A1 (de) * 2020-10-12 2022-04-14 Volkswagen Aktiengesellschaft Vorrichtung mit einem Gehäuse, einer formschlüssig in das Gehäuses eingebetteten Achse und einem drehbar auf der Achse gelagerten Rotor
DE102022210734A1 (de) 2022-10-12 2024-04-18 Robert Bosch Gesellschaft mit beschränkter Haftung Flüssigkeitspumpe, insbesondere Kühlmittelpumpe

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Also Published As

Publication number Publication date
EP2273123A1 (fr) 2011-01-12
EP2273123B1 (fr) 2016-10-05

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