EP2935898A1 - Géométrie permettant de compenser le jeu axial dans des pompes électriques - Google Patents

Géométrie permettant de compenser le jeu axial dans des pompes électriques

Info

Publication number
EP2935898A1
EP2935898A1 EP13777288.5A EP13777288A EP2935898A1 EP 2935898 A1 EP2935898 A1 EP 2935898A1 EP 13777288 A EP13777288 A EP 13777288A EP 2935898 A1 EP2935898 A1 EP 2935898A1
Authority
EP
European Patent Office
Prior art keywords
pump
electric
component
interface
pump component
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.)
Withdrawn
Application number
EP13777288.5A
Other languages
German (de)
English (en)
Inventor
Bernd Osswald
Joerg Sigrist
Eric Plantier
Erwin Franieck
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
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2935898A1 publication Critical patent/EP2935898A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/406—Casings; Connections of working fluid especially adapted for liquid pumps
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/605—Mounting; Assembling; Disassembling specially adapted for liquid pumps
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps

Definitions

  • a pump components such. an electric motor and a pump stage include.
  • the components are arranged in a common housing. When closing the housing, e.g. by crimping, beading or rolling the components are braced against each other.
  • the arranged inside the pump components may be made of different materials, so that it can come over the life of a pump to a setting of the components.
  • the internal bias of the components is lost to each other.
  • the components can through
  • an electric pump for conveying a fluid has a first pump component and a second pump component. At least a first interface is provided on the first pump component. The first pump component and the second pump component are in contact with each other at the first interface. The first interface has a slope relative to a plane perpendicular to a longitudinal axis of the electric pump.
  • the idea of the present invention is to provide a slope in areas where components of the electric pump are in contact with each other, so that when there is a gap between the components, the components can be rotated against each other and the gap is thereby closed becomes.
  • the slope is designed so that the surface of the interface encloses an angle with the plane perpendicular to a longitudinal axis of the electric pump.
  • the rotation can be e.g. by one of one of
  • Components generated torque can be effected.
  • one of the components can generate the torque or be connected in a torque-proof manner with a torque generator.
  • the other component can generate a counter-torque by being fixed to immovable, if necessary, components of the electric pump.
  • the electric pump can be used to convey different liquids or
  • Media such as fuel or windscreen washer fluid can be used.
  • the electric pump in motor vehicles for example as
  • Electric fuel pump can be used.
  • the electric pump may e.g. be designed as a side channel pump or roller cell pumping part with an electric motor.
  • the first pumping component may be an internal component of the electric pump, such as e.g. be a motor part or a motor housing.
  • the first pumping component may be an internal component of the electric pump, such as e.g. be a motor part or a motor housing.
  • the first pumping component may be an internal component of the electric pump, such as e.g. be a motor part or a motor housing.
  • the electric motor may have a stator, a rotatably mounted rotor in the stator and a shaft.
  • the first pump component can be designed as a connection cover of the electric pump.
  • the first pump component may be an intermediate housing or a suction cover of the electric pump.
  • the second pumping component may e.g. Anything with the first
  • the second pump component can be designed as an electric motor or as a housing of the electric motor. If the first pump component is designed as an electric motor, then the second pump component can be designed as a connection cover or as an intermediate housing. Furthermore, if the first pumping component is e.g. designed as an intermediate housing, so the second pump component as a suction cover or as
  • the first pump component has at least one first interface.
  • the first pump component may have a plurality of first interfaces.
  • the first interfaces define points of contact or
  • One or more corresponding second interfaces can correspondingly be provided on the second pump component.
  • the first interface has a slope or a flat slope with respect to a cross-sectional area perpendicular to a longitudinal axis of the electric pump.
  • the longitudinal axis of the electric pump runs, for example, parallel to a shaft of the electric motor.
  • the surface of the interface encloses an angle with the plane described.
  • the second interface has a surface with a magnitude equal to the slope same level. In this way, the first and the second
  • Pump component similar to a screw can be twisted against each other, so that the total length of the pump components along the longitudinal axis, even with expansion and compression of different materials of the
  • the first pump component is designed to generate, transmit or transmit a torque.
  • the torque causes a rotation of the first pump component against the second pump component.
  • the first pump member may be configured as an electric motor that generates a torque.
  • the second pump component may be an intermediate housing, which is arranged between the electric motor and a pump stage. Lies between the electric motor and the
  • the slope of the first interface closes with the vertical to the longitudinal axis of the electric pump Level an angle of 10 ° maximum.
  • This angle can be referred to as the rise angle.
  • the rise angle is a maximum of 5 ° and preferably a maximum of 2 °.
  • the bevel is designed such that upon rotation of the first pump component against the second pump component, a frictional engagement between the first and the second interface is formed.
  • the frictional engagement may be due to the geometric configuration, i. e.g. be favored by a flat slope at the interfaces and by an appropriate choice of materials.
  • the surfaces of the interfaces can be a material with a high
  • the coefficient of friction of the first interface and the second interface may be at least 0.3, in particular at least 0.5, and preferably at least 0.7.
  • the pitch angle of the slope i. the angle between the slope and the plane perpendicular to the longitudinal axis of the electric pump is less than a friction angle of the material of the first interface and the second
  • the drive direction and the coefficients of friction of the first and second pump components can be selected such that a rotation of the pump components relative to one another leads to a self-locking.
  • the second pump component has a second interface with a bevel corresponding to the first interface.
  • the second interface may be configured such that the first interface is smooth and possibly without
  • the second pump component designed as a housing of an electric motor or as an electric motor itself.
  • the second pump component is designed as an intermediate housing.
  • the second pump component between the electric motor and a Impeller arranged.
  • the impeller may also be referred to as an impeller or as a pump stage.
  • the Pump component designed as a housing of an electric motor or as an electric motor itself.
  • the second pump component is designed as a connection cover.
  • a method for manufacturing an above-described electric pump comprises the following steps: providing a first pump component having a first interface; Providing a second pump component; Arrange the
  • the first interface can first be skewed and then placed in the
  • Pump housing are arranged along a longitudinal axis of the electric pump. Furthermore, the method may include further steps such as e.g. Inject molding of the first pump component with plastic, in particular if this is designed as an electric motor.
  • a motor which generates an output torque.
  • the engine has a first engine part with a first interface. Furthermore, the engine has a second engine part. The first motor part and the second motor part are in contact with each other at the first interface.
  • the first interface has a slope with respect to a plane extending perpendicular to a longitudinal axis of the motor.
  • Fig. 1 shows components of an electric pump according to a
  • Fig. 2 shows a cross section through an electric pump according to a
  • Fig. 3 shows a plastically illustrated section of an electric pump according to an embodiment of the invention
  • the electric pump 1 is designed as an electric fuel pump for a motor vehicle.
  • the electric pump 1 may be suitable for arrangement in a storage tank of a fuel tank or directly in a fuel tank.
  • the first pump component 3 is embodied in the figures as a housing 23 of an electric motor 21. Furthermore, the second pump component 5 is as
  • the second pump component 5 may be designed as a connection cover 17.
  • any adjacent inner components of the electric pump 1 can function as first pump component 3 and second pump component 5.
  • the first pump component 3 as a connection cover 17 and the second
  • Pump component 5 may be designed as an electric motor 21 or as a housing 23 of the electric motor 21.
  • the electric pump 1 has a pump housing 15, e.g. made of steel. in the
  • Pump housings 15 are the internal components, i. the pump components 3, 5 arranged. In general, the pump components 3, 5 on the
  • Pump housing 15 braced so that they occupy with respect to each other defined positions. In this case, when closing the pump housing 15, e.g. by crimping, beading or rolling an axial force.
  • a bevel 11 is provided at the first interfaces 7, at which the first pump component 3 is in contact with the second pump component 5.
  • the pump components 3, 5 each have a plurality of webs distributed over the circumference and running in the direction of the pump axis 13, the bevels 11 being respectively formed on the webs of the pump components 3, 3 and the bevels 11 of the pump component 3 having the bevels 11 of the pump component 5 cooperate according to the invention.
  • the bevel 11 includes an angle ⁇ with a plane perpendicular to a longitudinal axis 13 of the electric pump 1 a plane. This angle is illustrated, for example, in FIGS. 3 and 4.
  • the angle ⁇ can also be referred to as the rise angle and is preferably less than 5 °.
  • the torque M is, for example, a counter-torque to the generated
  • Pump components 3, 5 are fixed with suitable geometry and choice of materials by the rotation against each other.
  • the slope 1 1 is aligned such that the counter-torque to the drive torque M closes the gap between the pump components 3.5.
  • the electric pump 1 has a pump housing 15, e.g. made of steel.
  • a suction cover 31 is arranged in the pump housing 15.
  • the fluid to be delivered such as e.g. Fuel get inside the electric pump 1.
  • the intermediate housing 27 which is e.g. PPS, a pump stage with a pump 29 is arranged.
  • the impeller 29 chambers are provided, in which the fluid is transported.
  • the pump housing 15 On the upper side, the pump housing 15 is closed by a connection cover 17 with a suction nozzle 19. Through the suction port 19, the fluid may e.g. via corrugated pipes to a consumer, e.g. one
  • the electric motor 21 has a stator and a rotor.
  • a shaft 25 of the electric motor 21 is rotatably connected to the impeller 31 and drives it.
  • the electric motor 21 and in particular the outer stator of the electric motor 21 may be connected to a plastic such
  • Polyamide be overmoulded.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

L'invention concerne une pompe électrique (1) servant à débiter un fluide. La pompe électrique (1) comporte un premier composant de pompe (3) possédant une première interface (7), ainsi qu'un second composant de pompe (5). Le premier composant de pompe (3) et le second composant de pompe (5) sont en contact l'un avec l'autre au niveau de la première interface (7). La première interface (7) possède une partie inclinée (11) par rapport à un plan perpendiculaire à un axe longitudinal (13) de la pompe électrique (1).
EP13777288.5A 2012-12-18 2013-10-17 Géométrie permettant de compenser le jeu axial dans des pompes électriques Withdrawn EP2935898A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012223592.2A DE102012223592A1 (de) 2012-12-18 2012-12-18 Geometrie zum Ausgleich axial auftretender Spalte in Elektropumpen
PCT/EP2013/071702 WO2014095118A1 (fr) 2012-12-18 2013-10-17 Géométrie permettant de compenser le jeu axial dans des pompes électriques

Publications (1)

Publication Number Publication Date
EP2935898A1 true EP2935898A1 (fr) 2015-10-28

Family

ID=49382426

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13777288.5A Withdrawn EP2935898A1 (fr) 2012-12-18 2013-10-17 Géométrie permettant de compenser le jeu axial dans des pompes électriques

Country Status (5)

Country Link
US (1) US9989061B2 (fr)
EP (1) EP2935898A1 (fr)
CN (1) CN104870826B (fr)
DE (1) DE102012223592A1 (fr)
WO (1) WO2014095118A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012223592A1 (de) * 2012-12-18 2014-07-03 Robert Bosch Gmbh Geometrie zum Ausgleich axial auftretender Spalte in Elektropumpen
DE102017210767B4 (de) * 2017-06-27 2019-10-17 Continental Automotive Gmbh Schraubenspindelpumpe, Kraftstoffförderaggregat und Kraftstofffördereinheit

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Also Published As

Publication number Publication date
US20150322950A1 (en) 2015-11-12
WO2014095118A1 (fr) 2014-06-26
CN104870826B (zh) 2017-10-03
US9989061B2 (en) 2018-06-05
CN104870826A (zh) 2015-08-26
DE102012223592A1 (de) 2014-07-03

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