EP1052410A2 - Rouet monté sur un rotor - Google Patents

Rouet monté sur un rotor Download PDF

Info

Publication number
EP1052410A2
EP1052410A2 EP00108901A EP00108901A EP1052410A2 EP 1052410 A2 EP1052410 A2 EP 1052410A2 EP 00108901 A EP00108901 A EP 00108901A EP 00108901 A EP00108901 A EP 00108901A EP 1052410 A2 EP1052410 A2 EP 1052410A2
Authority
EP
European Patent Office
Prior art keywords
impeller
rotor
pump according
pump
wall
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.)
Granted
Application number
EP00108901A
Other languages
German (de)
English (en)
Other versions
EP1052410A3 (fr
EP1052410B1 (fr
Inventor
Albert Genster
Ingo Fabricius
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.)
Wilo SE
Original Assignee
Wilo 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
Priority claimed from DE1999121362 external-priority patent/DE19921362A1/de
Priority claimed from DE19921365A external-priority patent/DE19921365B4/de
Application filed by Wilo GmbH filed Critical Wilo GmbH
Publication of EP1052410A2 publication Critical patent/EP1052410A2/fr
Publication of EP1052410A3 publication Critical patent/EP1052410A3/fr
Application granted granted Critical
Publication of EP1052410B1 publication Critical patent/EP1052410B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant 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
    • 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
    • F04D13/064—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
    • F04D13/0686—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
    • F04D29/18—Rotors
    • F04D29/20—Mounting rotors on shafts

Definitions

  • the present invention relates to an electrically operated Pump, in particular a canned pump to promote a Medium in a heating or cooling system with stator and with a rotatably mounted rotor, the rotor a hollow Rotor cylinder with arranged in the cylinder wall Has permanent magnets, in the cavity of a rotor bearing is arranged and carries an impeller on one end face.
  • Block construction pumps with low output up to about 100 watts are known from the prior art.
  • she have a thick-walled rotor cylinder, in the Cavity protrudes a rigid axis, the axis of the Rotor is rotatably mounted.
  • the impeller is directly on the front of the particular made of plastic Rotor cylinder molded so that on a shaft between the Rotor and the impeller can be dispensed with.
  • the magnetization of the rotor is achieved in a special embodiment by means of a magnetizable material, for example with a metal powder, which is mixed with the plastic from which the rotor cylinder is made.
  • a magnetizable material for example with a metal powder
  • the rotor cylinder and the impeller are made in one piece from such magnetisable "plastic, in particular injection molded from this plastic.
  • the rotor is magnetized after production by applying external magnetic fields.
  • a disadvantage of the known pumps is that the entire rotor-impeller unit from the expensive magnetizable plastic must be manufactured, although the magnetization only in the small areas of the rotor facing the stator coils necessary is. The rotor-impeller unit is therefore expensive.
  • Another disadvantage is that only open in the spraying process Impellers can be made that are known to be a have very low efficiency.
  • the object of the invention is therefore to provide such a pump create that with high reliability and cost-effective Manufacturing great flexibility in terms of customization the pump to meet various requirements.
  • the central idea of the invention is to separate the impeller and the rotor cylinder and to form both parts in such a way that they can be positively connected to one another at least in the circumferential direction.
  • the separation of the two parts has the advantage when using the plastic mixed with magnetizable material that only the rotor cylinder on the comparatively expensive magnetisable "plastic must be manufactured. Because of the smaller quantities required, a higher quality material ( Power magnet ”) can be used.
  • the impeller is then injection molded from conventional and cheap plastic. This is either a significant cost saving or an increase in performance at the same cost.
  • the pump according to the invention with that on the rotor cylinder mounted impeller is also characterized by a large Insensitivity to structural tolerances.
  • Impeller is detachably attachable to the rotor cylinder and can be replaced if worn or defective.
  • the expensive rotor cylinder remains in the pump.
  • the interchangeability The impeller offers greater flexibility Pump, because depending on the area of application a corresponding impeller can be placed on the rotor cylinder. It can be used by everyone Type of application ensures optimal efficiency become.
  • the impeller can also be made of metal and on be placed on the rotor cylinder, with metal impellers can also be easily produced in closed form can. Such closed impellers is another Pump efficiency can be increased.
  • the impeller is advantageously in the axial direction non-positively, in particular by a latch, or positively by a locking mechanism on the front wall of the Rotor cylinder attached. This makes it easy Ensure assembly and disassembly of the impeller. For the Disassembly of the impeller will simply be the pump housing and the motor part separated and the impeller from the rotor cylinder deducted. This embodiment makes one special easy maintenance.
  • the pump a rigid axle, which in the case of a canned pump the rear end wall of the containment shell is attached and in this protrudes into it.
  • the rotor cylinder is on the axis mounted by means of a plain bearing, advantageously into the cavity of the rotor cylinder made of plastic a ring of a coal bearing is pressed in on the axle running.
  • This embodiment is characterized by the particularly simple mechanical structure and a large Reliability and can be inexpensive as a mass product manufactured and advantageously in the cooling circuit of Motor vehicles are used.
  • the rotor cylinder magnetizable plastic it is advantageous to press or insert an inner sleeve made of metal covering the inner wall into the cavity of the rotor in order to ensure greater stability of the rotor. It is also advantageous to protrude this sleeve toward the impeller beyond the end face of the rotor cylinder and insert the protruding ring into a cylindrical groove in the rear end face of the impeller and extending in the axial direction.
  • the plastic manufactured rotor cylinder from an outer sleeve made of metal surround, it being particularly advantageous to form a shape to form the inner and outer sleeve into which the Plastic for the rotor cylinder can be cast.
  • the metallic sleeves ensure closed magnetic flux.
  • the axial bearing of the rotor and impeller formed Unit accomplished by a plain bearing that between the Impeller and the inner wall of the impeller chamber is arranged.
  • the slide bearing is particularly simple and advantageous to design the slide bearing as an axial slide bearing which is arranged between an annular surface arranged around the suction opening and an end surface of the impeller.
  • the impeller is held against the pump housing in the axial direction.
  • the plain bearing is particularly advantageous if the impeller and shaft or rotor are decoupled in the axial direction.
  • the impeller is in this case floating "held in the axial direction in the impeller chamber, which contributes to a large tolerance against structural inaccuracies and thus to a simplification of production.
  • the greater insensitivity also has an effect on different thermal expansion of the individual components.
  • the impeller advantageously remains against in the axial direction
  • the rotor cylinder is stabilized in the axial direction by the magnetic forces between the stator and the rotor.
  • the impeller rotates on a separate impeller axis store that protrudes into the impeller chamber.
  • the impeller has a central hub in this embodiment, in which can be pressed into the bearing bush of a coal warehouse and in which the impeller shaft is inserted.
  • this Embodiment can completely the hydraulic part of the electrical part to be separated, resulting in a large Maintenance friendliness of the centrifugal pump leads.
  • FIG 1 is a section through an electrically operated Canned tube pump shown how to promote the cooling medium can be used in a motor vehicle.
  • the one Motor housing 1 made of plastic surrounded electric drive the pump has a stator with stator windings 2 which can be applied to a supply voltage via lines 3.
  • the control electronics 4 of the pump is on the rear Front of the pump arranged.
  • the stator is through one Can 5 rotatable from within the stator mounted rotor 6 hydraulically separated.
  • the motor housing 1 is attached to a pump housing 7 via a flange and sealed with an O-ring seal 8.
  • an impeller 9 with blades 10 arranged In an impeller chamber located in the pump housing 7 in this case an open impeller 9 with blades 10 arranged, the medium via an inlet port 11th is supplied and which the medium to an outlet port 12 promotes.
  • the impeller with the molded blades 10 is in in this case molded from plastic.
  • the rotor 6 has a fetching rotor cylinder 13 which is in this case is molded from plastic, being in the Plastic is a magnetizable material embedded. After the material has been magnetized, the outer wall bears of the rotor cylinder 13 permanent magnets with the Interact stator windings 2.
  • a metal sleeve 14 is introduced in the interior of the Rotor cylinder 13 serves to stabilize the rotor cylinder 13.
  • a bushing 15 of a coal store pressed in which is rotatably mounted on a rigid shaft 16 is.
  • Rotor cylinder 13 through an axial bearing with a slide ring 17 secured in the manner of a circlip that fits into a groove is inserted at the head of the axis 16.
  • the rigid axis 16 is into a cylindrical holder 20 formed on the containment shell 5 plugged in.
  • the impeller 9 is on the front wall of the Mounted rotor cylinder 13 and is in by a bracket Circumferential direction held positively. These are at the Rear of the impeller 9 arranged pins 18 in corresponding recesses in the front of the Rotor cylinder inserted. In the axial direction it is Impeller 9 held non-positively. To center the Impeller has this axially in its rear extending annular groove 19 into which the metal sleeve 14 is plugged in.
  • FIG 2 a similar pump is shown, in which the Rotor cylinder 13 against displacement in the axial direction by the magnetic force between the stator and the rotor held.
  • the rigid axis 16 is in turn in a Can 5 molded cylindrical holder 15 inserted.
  • the impeller 9 is thus over the slide bearing against the inner wall, with a sliding ring in the inner wall 21 is embedded.
  • the impeller points to separate storage a hub 25 with which it is on one on the pump housing attached and protruding into the impeller chamber Impeller axis 21 slides.
  • the impeller axis 21 is in a Pump housing molded socket 22 inserted, the Bushing 22 via radial webs 23 with the Inner wall of the suction opening is connected.
  • the webs 23 have a hydrodynamically particularly favorable profile and offer only a small flow to the medium Resistance.
  • In the hub of the impeller 9 is a bearing bush 24 of a coal bearing pressed in with the impeller axis Plain bearing forms.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP00108901A 1999-05-10 2000-04-27 Rouet monté sur un rotor Expired - Lifetime EP1052410B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE1999121362 DE19921362A1 (de) 1999-05-10 1999-05-10 Auf den Rotor aufgestecktes Laufrad
DE19921362 1999-05-10
DE19921365A DE19921365B4 (de) 1999-05-10 1999-05-10 Elektromagnetisch betriebene Pumpe mit Axialspaltlager
DE19921365 1999-05-10

Publications (3)

Publication Number Publication Date
EP1052410A2 true EP1052410A2 (fr) 2000-11-15
EP1052410A3 EP1052410A3 (fr) 2001-09-12
EP1052410B1 EP1052410B1 (fr) 2003-07-30

Family

ID=26053286

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00108901A Expired - Lifetime EP1052410B1 (fr) 1999-05-10 2000-04-27 Rouet monté sur un rotor

Country Status (2)

Country Link
EP (1) EP1052410B1 (fr)
DE (1) DE50003066D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100429408C (zh) * 2005-07-09 2008-10-29 于国强 改进的微型罩极式水泵

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109474109B (zh) * 2019-01-11 2024-03-29 苏州优德通力科技有限公司 一种密封型外转子电机结构

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2406947A (en) * 1944-08-30 1946-09-03 Smith Corp A O Centrifugal pump
DE1538894A1 (de) * 1966-08-16 1970-03-26 Licentia Gmbh Umwaelzpumpe,welche von einem Elektromotor betrieben wird
DE3822897A1 (de) * 1988-07-06 1990-01-11 Webasto Ag Fahrzeugtechnik Umwaelzpumpe
US5269664A (en) * 1992-09-16 1993-12-14 Ingersoll-Dresser Pump Company Magnetically coupled centrifugal pump
US5288215A (en) * 1992-11-19 1994-02-22 Chancellor Dennis H Integral motor centrifugal pump
DE4446606A1 (de) * 1994-12-28 1996-07-04 Wilo Gmbh Piezo-Wanderwellenmotor
JPH10311293A (ja) * 1997-05-13 1998-11-24 Japan Servo Co Ltd キャンドモータポンプ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100429408C (zh) * 2005-07-09 2008-10-29 于国强 改进的微型罩极式水泵

Also Published As

Publication number Publication date
EP1052410A3 (fr) 2001-09-12
EP1052410B1 (fr) 2003-07-30
DE50003066D1 (de) 2003-09-04

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