EP1770283B1 - Pumpe mit integriertem Motor - Google Patents

Pumpe mit integriertem Motor Download PDF

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Publication number
EP1770283B1
EP1770283B1 EP06026954A EP06026954A EP1770283B1 EP 1770283 B1 EP1770283 B1 EP 1770283B1 EP 06026954 A EP06026954 A EP 06026954A EP 06026954 A EP06026954 A EP 06026954A EP 1770283 B1 EP1770283 B1 EP 1770283B1
Authority
EP
European Patent Office
Prior art keywords
rotor
pump
pump according
impeller
ring
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.)
Expired - Lifetime
Application number
EP06026954A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1770283A1 (de
Inventor
Michal Kalavsky
Pietro De Filippis
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete 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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP1770283A1 publication Critical patent/EP1770283A1/de
Application granted granted Critical
Publication of EP1770283B1 publication Critical patent/EP1770283B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04D13/0633—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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps

Definitions

  • the present invention relates to a pump with integrated, electronically commutated wet-rotor motor.
  • Such pumps are for example FR 2 608 228 A1 .
  • a shaft rotates with a rotor of the motor in a rotor chamber and an impeller of the pump in a hydraulic chamber.
  • a bearing plate with a plain bearing for supporting the shaft and a rubber seal to protect the sliding bearing against contamination and corrosion by the water.
  • This bearing shield prevents water from flowing from the hydraulic chamber into the rotor chamber. If a defect occurs on the sealing rubber, the water can enter the rotor chamber. This contamination by the water and corrosion can cause damage to the sleeve bearing and the rotor chamber.
  • the object of the invention is to provide a pump with integrated, electronically commutated wet-rotor motor, which is protected in a simple manner against damage.
  • the pump chamber is constantly cleaned by water flow during the pumping process, so that no strong contamination of the water occurs.
  • the rotor can be cooled by the water flow.
  • the pump chamber is formed by a front housing shell and a shield of the engine. To this Way, it is possible to reduce the size of the pump, as can be dispensed with a bearing plate between the rotor and an impeller of the pump.
  • the shield is cup-shaped.
  • the rotor can be covered by the shield with the least possible gap, resulting in a high volume utilization of the engine.
  • the pump has a rotationally mounted axle on which the rotor is rotatably mounted.
  • the axis for vibration damping in the shield is mounted in at least one O-ring, which is preferably formed of rubber.
  • the rotor is supported by at least one radial sliding bearing on the axle. In this way, the life of the sliding bearing is increased because it rotates together with the rotor on the axis.
  • the radial sliding bearing is held in the rotor by an O-ring.
  • tolerances in the plain bearing receptacle of the rotor can be compensated by the elastic O-ring, so that the sliding bearing is concentric on the axis.
  • vibrations of the rotor are damped by the O-ring, so that the requirement for vibration damping of the axle can be reduced.
  • the rotor is supported by a thrust bearing on the axle.
  • This has the advantage that the thrust bearing reduces axial play of the rotor.
  • the sliding bearing and / or the thrust bearing on a liquid seal, in particular with a sealing rubber and / or an O-ring.
  • a sealing rubber and / or an O-ring In this way, the sliding bearing and / or the thrust bearing is sealed during the pumping process, so that a water flow through the sliding bearing and / or by the axial bearing is prevented and thus no corrosion can occur in the bearings.
  • the rotor has an interior which is subdivided into two subregions tapering conically towards one another.
  • a predetermined breaking point is provided in two parts for entered into the interior and freezing water, whereby the on the rotor in radial and axial direction tensile stresses can be reduced.
  • the two sections are arranged between two radial plain bearings, wherein the two radial plain bearings are each held in the rotor with an elastic O-ring, so that the freezing water can expand in the axial direction by slight displacements of the radial plain bearings.
  • the rotor has an impeller.
  • the impeller is integrally formed on the rotor. In this way, an assembly of the pump is simplified, since the number of separate components is reduced.
  • the rotor is plastic coated. This ensures in a simple manner that the rotor is waterproof. The epicn thus is a one-piece design of the rotor with the impeller made of plastic very easy to perform.
  • FIG. 1 and the FIG. 2 show a section through a pump with integrated, electronically commutated wet rotor motor.
  • the housing of the pump 1 is composed of a front housing shell 2 and a pot-shaped plate 3, which are both positively connected to each other.
  • the housing of the pump 1 forms a one-piece pump chamber 4, which comprises in its interior a rotor 5 with an impeller 6.
  • the impeller 6 is integrally formed on the rotor 5.
  • the rotor 5 is rotatably mounted on a shaft 9 by a front, the impeller 6 facing slide bearing 7 and by a rear, the shield 3 facing slide bearing 8.
  • the rotor 5 fixed at its two ends by a respective clamping ring 10, 11.
  • the rotor 5 at its front, the impeller 6 facing end to reduce the axial movement of a thrust bearing 12, with a socket for a O-ring 13 between the thrust bearing 12 and the sliding bearing 7.
  • the O-ring 13 By the O-ring 13, the sliding bearing 7 against a liquid inlet, in particular against a water inlet, sealed and elastically centered in the radial direction.
  • a rubber shock absorber 14 is inserted between the thrust bearing 12 and the clamping ring 11, a rubber shock absorber 14 is inserted.
  • the axis 9 is at its front, the impeller 6 end facing in a seat 15 which is fixed by support arms 16 to the front housing shell 2, and at its rear, the shield 3 end facing in a seat 17 which in the shield. 3 is formed rotatably mounted.
  • a compensating element 18 is inserted, which is preferably designed as a rubber disc to compensate for axial changes in length of the axis 9 with temperature fluctuations can.
  • the axis 9 fixed in the seat 17 of the shield 3 by an O-ring 19.
  • the O-rings 13, 19 as well as the compensation element 18 made of rubber, so that vibrations of the rotor 5 and thus the axis 9 can be absorbed.
  • the entire rotor 5 is plastic coated. From the same plastic, the impeller 6 of the pump 1 is formed on the rotor 5.
  • the rotor 5 and the impeller 6 can be manufactured as one piece. This one-piece design is not mandatory, but has the advantage that the number of components is smaller and the problem of fixing the impeller 6 on the rotor 5 is bypassed.
  • stator 21 of the wet-rotor motor is arranged, so it is a so-called internal rotor. It is also an embodiment as an external rotor possible.
  • the electrical connection of the stator 21 is in the form of a resilient contact 22 to an electrical drive circuit, which is arranged on a circuit board 23. In this way it is possible to mount the pump 1 without a special soldering tool.
  • the board 23 is covered by a rear housing shell 24 which is connected by screws 25 to the stator 21 and the cup-shaped shield 3.
  • the impeller 6 In order to improve the flow characteristics within the impeller 6, sitting on the axis 9 as a final piece in front of the front, the impeller 6 facing Clamping ring 11 a shaped head piece 26 which separates the clamping ring 11 of the water-conducting portion 27 of the impeller.
  • the shape of the head piece 26 is adapted to the shape of the impeller 6 such that the flow resistance is minimal.
  • a gap seal 28 is formed, in which the impeller 6 rotates.
  • FIG. 2 are the radial bearings 7, 8 held in the rotor 5 by a respective elastic O-ring 30, 31.
  • these O-rings 30, 31 serve to compensate for tolerances in the plain bearing receptacle of the rotor 5, so that the plain bearings 30, 31 sit concentrically on the axis 9.
  • vibrations of the rotor 5 are damped by the elastic O-rings 30, 31. Therefore, in comparison to the first embodiment according to FIG. 1 be dispensed with the O-ring 19 in the seat 17 of the shield 3 and the rubber shock absorbers 14 for vibration damping of the axle 9.
  • the functionality of the clamping ring 11 already exists in the head piece 26 FIG. 1 integrated, so that can be dispensed with this further component.
  • the interior of the rotor 5 is divided into two conically tapered sections 32, 33. If water enters this interior space of the rotor 5 between the two slide bearings and freezes this water to ice, it breaks up into two parts corresponding to the partial areas 32, 33. When expanding, these two parts can press the radial slide bearings 7, 8 to a slight extent in the axial direction outwards, so that tensile stresses on the rotor 5 are reduced both in the radial and in the axial direction.
  • the pump 1 is designed in particular for use in water-conducting household appliances, such as dishwashers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Valve Device For Special Equipments (AREA)
  • Rotary Pumps (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Control Of Electric Motors In General (AREA)
  • Compressor (AREA)
  • Motor Or Generator Frames (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
EP06026954A 2003-07-22 2004-07-07 Pumpe mit integriertem Motor Expired - Lifetime EP1770283B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10333308 2003-07-22
DE10352487A DE10352487A1 (de) 2003-07-22 2003-11-07 Pumpe mit integriertem Motor
EP04740758A EP1649169B1 (de) 2003-07-22 2004-07-07 Pumpe mit integriertem motor

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP04740758A Division EP1649169B1 (de) 2003-07-22 2004-07-07 Pumpe mit integriertem motor

Publications (2)

Publication Number Publication Date
EP1770283A1 EP1770283A1 (de) 2007-04-04
EP1770283B1 true EP1770283B1 (de) 2009-04-01

Family

ID=34137300

Family Applications (4)

Application Number Title Priority Date Filing Date
EP06026955A Expired - Lifetime EP1777416B1 (de) 2003-07-22 2004-07-07 Pumpe mit integriertem Motor
EP06026954A Expired - Lifetime EP1770283B1 (de) 2003-07-22 2004-07-07 Pumpe mit integriertem Motor
EP04740758A Expired - Lifetime EP1649169B1 (de) 2003-07-22 2004-07-07 Pumpe mit integriertem motor
EP06026953A Expired - Lifetime EP1777415B1 (de) 2003-07-22 2004-07-07 Pumpe mit integriertem Motor

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP06026955A Expired - Lifetime EP1777416B1 (de) 2003-07-22 2004-07-07 Pumpe mit integriertem Motor

Family Applications After (2)

Application Number Title Priority Date Filing Date
EP04740758A Expired - Lifetime EP1649169B1 (de) 2003-07-22 2004-07-07 Pumpe mit integriertem motor
EP06026953A Expired - Lifetime EP1777415B1 (de) 2003-07-22 2004-07-07 Pumpe mit integriertem Motor

Country Status (11)

Country Link
US (1) US7819640B2 (es)
EP (4) EP1777416B1 (es)
KR (1) KR100776476B1 (es)
CN (1) CN100434720C (es)
AT (4) ATE372464T1 (es)
DE (5) DE10352487A1 (es)
ES (3) ES2323277T3 (es)
PL (1) PL1649169T3 (es)
RU (1) RU2332587C2 (es)
SI (1) SI1649169T1 (es)
WO (1) WO2005015023A1 (es)

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Also Published As

Publication number Publication date
EP1777415A1 (de) 2007-04-25
ES2324177T3 (es) 2009-07-31
US20060251513A1 (en) 2006-11-09
PL1649169T3 (pl) 2008-01-31
WO2005015023A1 (de) 2005-02-17
EP1777416B1 (de) 2009-04-29
ES2293285T3 (es) 2008-03-16
RU2332587C2 (ru) 2008-08-27
ES2323277T3 (es) 2009-07-10
KR20060040709A (ko) 2006-05-10
CN100434720C (zh) 2008-11-19
ATE372464T1 (de) 2007-09-15
ATE427428T1 (de) 2009-04-15
EP1649169B1 (de) 2007-09-05
DE502004004892D1 (de) 2007-10-18
KR100776476B1 (ko) 2007-11-16
DE502004009291D1 (de) 2009-05-14
DE502004009441D1 (de) 2009-06-10
DE10352487A1 (de) 2005-02-10
DE502004009289D1 (de) 2009-05-14
ATE427429T1 (de) 2009-04-15
EP1770283A1 (de) 2007-04-04
US7819640B2 (en) 2010-10-26
ATE430262T1 (de) 2009-05-15
SI1649169T1 (sl) 2008-02-29
CN1826470A (zh) 2006-08-30
RU2006100277A (ru) 2006-07-10
EP1777416A1 (de) 2007-04-25
EP1649169A1 (de) 2006-04-26
EP1777415B1 (de) 2009-04-01

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