EP0068948A1 - Elektrisch angetriebene Motorpumpe mit Tauchrotor - Google Patents

Elektrisch angetriebene Motorpumpe mit Tauchrotor Download PDF

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Publication number
EP0068948A1
EP0068948A1 EP82401042A EP82401042A EP0068948A1 EP 0068948 A1 EP0068948 A1 EP 0068948A1 EP 82401042 A EP82401042 A EP 82401042A EP 82401042 A EP82401042 A EP 82401042A EP 0068948 A1 EP0068948 A1 EP 0068948A1
Authority
EP
European Patent Office
Prior art keywords
pump
shaft
rotor
motor
group according
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
EP82401042A
Other languages
English (en)
French (fr)
Other versions
EP0068948B1 (de
Inventor
Jean-Jacques Destelle
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.)
ELECTRO-HYDRAULIQUE SEH Ste
Original Assignee
ELECTRO-HYDRAULIQUE SEH Ste
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 ELECTRO-HYDRAULIQUE SEH Ste filed Critical ELECTRO-HYDRAULIQUE SEH Ste
Publication of EP0068948A1 publication Critical patent/EP0068948A1/de
Application granted granted Critical
Publication of EP0068948B1 publication Critical patent/EP0068948B1/de
Expired 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
    • F04D13/0606—Canned motor pumps
    • F04D13/0613—Special connection between the rotor compartments
    • 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
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/12—Shaft sealings using sealing-rings
    • F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps

Definitions

  • the invention relates to a motor pump unit for circulating a liquid and comprising a pump and an electric motor driving the pump, the rotor of which is embedded in a liquid of the same nature as the circulating liquid.
  • a pump unit is used in particular to constitute a circulator of a central heating or sanitary water installation.
  • the seals are not completely absent from the connection between the pump and the motor. '
  • the liquid in which the rotor is embedded is free of abrasive particles, and / or to avoid sedimentation, which are detrimental to the proper functioning and to the life of the engine, means are generally provided between pump and engine. limit the exchange of liquid between the pump enclosure and the rotor enclosure.
  • a support is provided carried by the shaft and carrying a surface centered on the axis of the shaft and transverse to the latter which is applied by means of a spring against another surface.
  • the invention makes it possible to dispense with a spring.
  • the pump set according to the invention is characterized in that the surface carried by the shaft is transverse to the latter, and applied, by virtue of the axial thrust resulting from the operation of the pump, against a corresponding stationary surface, for example integral with the partition between the pump and the motor.
  • the invention makes it possible to dispense with the stop means provided for absorbing the axial thrust due to the operation of the pump and arranged inside the motor, because in the group according to the invention these stop means are formed by the transverse surfaces in contact.
  • the filling of the engine with the liquid is obtained when stopped because, in this condition there is no axial thrust and there appears a gap between the surfaces normally in contact which is sufficient to ensure rapid filling. This filling can also be obtained even when the surfaces are in contact due to the inevitable leaks.
  • the examples shown are pump units constituting circulators for central heating installation.
  • Each of these groups includes a pump 1 proper for circulating water in the pipes of the installation and a single-phase asynchronous electric motor 2 with a rotor 3 mounted on a shaft 4 and driving the pump 1.
  • the rotor 3 is enclosed in a housing 5, one end of which is mounted for sealing, by means of a seal 6, on a sleeve 7 extended outside the housing 5 by a wall 8 perpendicular to the axis 9 of the shaft and constituting, with the sleeve 7, the partition wall between the enclosure of the motor 2 proper and the enclosure of the pump 1.
  • the stator 2 a is on the other hand outside the housing 5.
  • This sleeve 7 has around the bearing 10, axial channels 11 for the introduction of the liquid into the enclosure of the rotor.
  • FIG. 1 the axial force on the shaft 4, due to the operation of the pump 1, operates in the direction of arrow F, that is to say from the motor to the pump.
  • the shaft 4 carries outside the motor 2, that is to say on the side of the sleeve 7 opposite to that which is turned towards the rotor 3, a solid disc 12 made of a flexible material such as rubber.
  • This disc 12 has a flat face 13 perpendicular to the axis 9 and directed towards the pump in which is formed an annular housing 14 for a ring 15 made of a friction material such as steel, ceramic or graphite, whose free surface 16 projecting from the face 13 is applied against a contact surface 17 constituting the end surface of another ring 18, also made of steel, ceramic or graphite, housed in an annular groove, centered on the axis 9, of a flange 19 with a cylindrical edge 20 itself housed in a recess 21 of the wall 8 and welded to the latter.
  • the surface 13 of the disc 12 is substantially coplanar with the surface 22 of the wall 8 which faces the pump.
  • the flange 19 has a central opening 23 centered on the axis 9 and of diameter greater than the diameter of the shaft 4 so that the liquid contained in the pump can access the ring 15 and the ring 18.
  • the engine 2 is filled when stopped, when no axial thrust is exerted. In this case, a slight gap is formed between the rings, which allows the passage of water first in the interval between the disc 12 and the sleeve 7, then in the enclosure 5 by passing through the channels. 11 of the sleeve 7.
  • the average engine run time is greater than with known groups due to the limitation of exchanges between the pump and the rotor enclosure.
  • the axial force exerted on the shaft 4 is in the direction of the arrow F ', that is to say from the pump 1 towards the motor 2.
  • the ring 18 ′ is arranged in a housing 30 in the wall 8 which opens onto the face 22 facing the pump.
  • the housing 30 has a cylindrical surface with an axis 9 and a bottom 31 parallel to the face 22.
  • the solid disc 12 'driven by the shaft 4 carrying the ring 15' and ending with the contact surface 16 'perpendicular to the axis 9 is, in this example, further from the motor than in the example in the figure 1.
  • a filter 35 surrounding the shaft 4 and disposed in a housing 36 of smaller diameter than that, 21, housing the flange 20 of the flange 19 (FIG. 1) or that that, 30, housing the ring 18 '( Figure 2).
  • This filter 35 being placed upstream of the orifices 11, contributes to preventing particles in suspension in the liquid, which could have passed through the gap between the rings in contact, from entering the enclosure 5 of the rotor 3.
  • the fixed ring, 18 or 18 ′ instead of constituting a piece attached to the wall 8 or to a bowl 19 integral with this wall, forms a piece in one piece with said bowl (FIG. 1) or with the actual wall ( Figure 2), thus constituting a boss on the bottom of the bowl or the wall.

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)
EP82401042A 1981-06-26 1982-06-08 Elektrisch angetriebene Motorpumpe mit Tauchrotor Expired EP0068948B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8112610A FR2508563B1 (fr) 1981-06-26 1981-06-26 Motopompe a moteur electrique a rotor noye
FR8112610 1981-06-26

Publications (2)

Publication Number Publication Date
EP0068948A1 true EP0068948A1 (de) 1983-01-05
EP0068948B1 EP0068948B1 (de) 1985-05-15

Family

ID=9259914

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401042A Expired EP0068948B1 (de) 1981-06-26 1982-06-08 Elektrisch angetriebene Motorpumpe mit Tauchrotor

Country Status (3)

Country Link
EP (1) EP0068948B1 (de)
DE (1) DE3263512D1 (de)
FR (1) FR2508563B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0928914A1 (de) * 1998-01-07 1999-07-14 WILO GmbH Kreiselmotorpumpe mit Gleitringdichtung
WO2013189571A1 (de) * 2012-06-22 2013-12-27 Wilo Se Motorkreiselpumpe mit einer gleitringdichtung

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7264450B2 (en) * 2000-12-22 2007-09-04 Grundfos A/S Pump unit and method for operating a pump unit
DE10322464B4 (de) * 2003-05-16 2012-05-03 Ksb Ag Spaltrohrmotorpumpe
DE102004048557A1 (de) * 2004-10-04 2006-04-06 Aweco Appliance Systems Gmbh & Co. Kg Flüssigkeitspumpe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR775739A (fr) * 1934-07-11 1935-01-08 Joint interstitiel pour pompes centrifuges
US3366068A (en) * 1965-09-13 1968-01-30 Smedegaard As Fluid circulation pump
FR2006034A1 (de) * 1968-04-11 1969-12-19 Hercole Marelli Et C

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR775739A (fr) * 1934-07-11 1935-01-08 Joint interstitiel pour pompes centrifuges
US3366068A (en) * 1965-09-13 1968-01-30 Smedegaard As Fluid circulation pump
FR2006034A1 (de) * 1968-04-11 1969-12-19 Hercole Marelli Et C

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0928914A1 (de) * 1998-01-07 1999-07-14 WILO GmbH Kreiselmotorpumpe mit Gleitringdichtung
WO2013189571A1 (de) * 2012-06-22 2013-12-27 Wilo Se Motorkreiselpumpe mit einer gleitringdichtung
CN104411977A (zh) * 2012-06-22 2015-03-11 威乐欧洲股份公司 具有滑环密封装置的马达离心泵
CN104411977B (zh) * 2012-06-22 2018-02-23 威乐欧洲股份公司 具有滑环密封装置的马达离心泵

Also Published As

Publication number Publication date
FR2508563B1 (fr) 1985-11-08
EP0068948B1 (de) 1985-05-15
DE3263512D1 (en) 1985-06-20
FR2508563A1 (fr) 1982-12-31

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