EP0009449B1 - Palier pour pompe centrifuge ambivalente - Google Patents

Palier pour pompe centrifuge ambivalente Download PDF

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Publication number
EP0009449B1
EP0009449B1 EP79400651A EP79400651A EP0009449B1 EP 0009449 B1 EP0009449 B1 EP 0009449B1 EP 79400651 A EP79400651 A EP 79400651A EP 79400651 A EP79400651 A EP 79400651A EP 0009449 B1 EP0009449 B1 EP 0009449B1
Authority
EP
European Patent Office
Prior art keywords
pump
stop member
motor
centrifugal pump
driven
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
Application number
EP79400651A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0009449A1 (fr
Inventor
Claude Van Rossem
Jean-Claude Le Dall
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 EP0009449A1 publication Critical patent/EP0009449A1/fr
Application granted granted Critical
Publication of EP0009449B1 publication Critical patent/EP0009449B1/fr
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
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/06—Multi-stage 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
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system

Definitions

  • the present invention relates to centrifugal pumps, in particular those of them which, constituted by a plurality of stackable pump elements driven by an incorporated electric motor, belong to the so-called multicellular type.
  • centrifugal pumps In the construction technique of centrifugal pumps, a distinction is made between pumps intended to operate in air and others capable of pumping a liquid in which they are immersed.
  • the electric motor driving the pump is cooled by the effect of a circulation, usually forced, of the fluid borrowed from the ambient medium: air for the first, the liquid to be pumped for seconds.
  • a centrifugal pump with an electric motor cooled by the pumped fluid is known from British Patent No. 410322. Since it involves conveying a flammable liquid and preventing air from entering the motor, the latter is enclosed in a housing sealed inside the pump body. To cool the bearings of the shaft driven by the motor, these are lubricated by a fluid using an auxiliary pump which feeds a network of pipes connected to the bearings. The construction of this pump is complicated due to the particular arrangement of its motor and its bearings. Such an arrangement is not required in a multicellular type pump for aqueous fluid where the risk of ignition of the fluid is by nature excluded. Also known is a fuel pump described by French patent 2175388 in which the electric motor is cooled by the fuel carried by the pump.
  • the cooling of the fluid and the lubrication of the bearings are carried out using a double wall assembly and a branch in which the fluid circulates in a direction opposite to the fluid conveyed by the pump.
  • a cooling system which is also complicated and expensive is not necessary when it comes to pumping a liquid which is inherently non-flammable, for example an aqueous liquid, as is the case when it is a question of pumping water. water from a pond, river or well.
  • the present invention aims to lower the cost price of such bearings and therefore of centrifugal pumps provided with these bearings.
  • This object has been achieved mainly by using inexpensive materials that do not require final machining, as well as by a judicious arrangement of these bearings allowing effective cooling of these, this arrangement excluding the use of auxiliary cooling means, such as those provided in the prior art mentioned above.
  • the invention provides uti 'lisation bearings each comprising a sleeve driven by a dog clutch, a pad cooperating with a stop carried by a stopper support and said stop being adapted to be driven in rotation and being provided with self-alignment means.
  • the central drive part M comprises an electric motor with a flooded rotor. This rotor is visible at 3, the motor stator is illustrated at 4, the motor windings at '5. In order to avoid a possible short circuit between metallic masses of the rotor and the stator by a pumped liquid which would be conductive, it is planned to isolate them according to the rules of the art.
  • the motor shaft 6 drives the pump elements, by means of the extensions 7, 7 'along the common axis of rotation R'R and on either side of the central drive part.
  • each of the pump parts P and P ′ is constituted by the stack of two pump elements, such as the stacks EP1 and EP2 of the right end of FIG. 1.
  • any pump element such as the stack EP1
  • a wheel capable of turning in a chamber such as the wheel 11 in the chamber 12 of the stack EP1, under the action of a driving driving force from the single engine.
  • the wheels such as the wheel 11, are included coaxially with the pump shaft.
  • the wheels of the various superimposed elements are rigidly assembled together by a dog clutch as has been described in FR-A-2342416.
  • the superimposed wheels are assembled by clutches by means of a fitting of dog teeth with trapezoidal profile eliminating any axial play, as described in the aforementioned patent.
  • the cavities 1'3 'and 13 are individually in communication with the chambers 12' and 12 via the elements 15 'and 15 usually designated each by the term "return channel", the pumped liquid existing in the cavity 13 'is routed along the arrow through the conduit 14 in the cavity 13.
  • the fgiure being of revolution, the circulation of liquids established by the conduit 14 continuously and constitutes a true coolant jacket of the engine.
  • FIG. 2 shows the detail arrangement of a bearing in the embodiment of the invention illustrated by Figure 1.
  • the shaft sleeve is designated by 8, the stop support by 9, the bearing by 10, the stop ring by 29, the O-ring by 19.
  • the stop is constituted by a piece in the form of a ring 29. On the perimeter of large diameter of this ring are hollowed out several notches, in the example described there are three notches at 120 ° relating to the thickness of the ring. On the other hand, the circumferential edge of small diameter of the stop ring 29 is chamfered on one of its planar faces, as is particularly visible in the sectional view of Figure 1.
  • the assembly between the support stop 9 and the shaft sleeve 8 is made by dog clutch.
  • the stop support 9 is made integral with the motor shaft by means of a pin fixing 90 visible in FIG. 1.
  • the O-ring 19 is introduced at the bottom of the low-cut part of the stop support 9.
  • the stop support 9 has on its large diameter periphery three flexible extensions, such as the extension 39 in the shape of a claw or tongue.
  • the abutment ring 29 is threaded, anchoring the flexible tabs in the notches provided, so that the chamfered edge comes to bear on the joint 19.
  • the dog clutch 8-9 is assembled.
  • the stop support 9 rotates the shaft sleeve 8 by dog clutch and by means of the three claws, in retaining tabs, the stop ring 29.
  • any alignment imperfection is erased by the recommended arrangement.
  • the parts: shirt, pad and stopper are made of a material of the ceramic type.
  • the stop support is made of a thermoplastic material of the noryl type, flexible and robust.
  • the recommended solution is economical since the arrangement is self-aligning without requiring machined surfaces with too narrow tolerances. It has the very great advantage of erasing the alignment imperfections or those of surfacing of the parts.
  • the two bearings, front and rear, are both lubricated by the pumped liquid.
  • the abutment face of the bearings has three grooves at 120 °, so as to maintain a constant liquid film, between the friction faces. These grooves are not shown in the figure.
  • Such a pump is designed to be used interchangeably in air: for example, in line, on a pipe, or in the liquid to be pumped in which it is immersed without damage.
  • the liquid to be pumped can for example be pure water or water containing salts or impurities such as to make it electrically conductive.
  • the liquid may be different from water, the adaptation to the liquid to be pumped being within the domain of a person skilled in the art.
  • the example described constitutes an ambivalent pump model of the "amphibious" type operating in both air and water.
  • It can be used to drain water by submerging it at the bottom of a pond, a river, a well, etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
EP79400651A 1978-09-22 1979-09-18 Palier pour pompe centrifuge ambivalente Expired EP0009449B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7827164 1978-09-22
FR7827164A FR2436898A1 (fr) 1978-09-22 1978-09-22 Pompe centrifuge ambivalente

Publications (2)

Publication Number Publication Date
EP0009449A1 EP0009449A1 (fr) 1980-04-02
EP0009449B1 true EP0009449B1 (fr) 1982-05-05

Family

ID=9212906

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79400651A Expired EP0009449B1 (fr) 1978-09-22 1979-09-18 Palier pour pompe centrifuge ambivalente

Country Status (4)

Country Link
EP (1) EP0009449B1 (da)
DK (1) DK394179A (da)
ES (1) ES484345A1 (da)
FR (1) FR2436898A1 (da)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3014103A1 (de) * 1980-04-12 1981-10-15 Hermetic-Pumpen Gmbh, 7803 Gundelfingen Pumpenaggregat mit einem mehrstufigen pumpenteil
CH656677A5 (de) * 1981-11-03 1986-07-15 Ruetschi Ag Pumpenbau Brugg K Spaltrohrmotortauchpumpe.
DE3539883A1 (de) * 1985-09-18 1987-03-26 Hermetic Pumpen Gmbh Selbstansaugende kreiselpumpe
GB2244095A (en) * 1990-05-17 1991-11-20 Hwang Cheng Luen Aquarium pump arrangement
DE69329396T2 (de) * 1992-04-14 2001-04-12 Ebara Corp., Tokio/Tokyo Pumpengehäuse in Blechbauweise
JPH08177782A (ja) * 1994-12-27 1996-07-12 Ebara Corp 両吸込ポンプ
WO2001020168A1 (de) * 1999-09-16 2001-03-22 Gwj Engineering Gbr Turbogebläse
GB0411040D0 (en) * 2004-05-18 2004-06-23 Weir Pumps Ltd Pump assembly
GB2417523B (en) * 2004-08-23 2009-07-08 Frank Mohn Flatoey As Rotodynamic fluid machine
JP2015089697A (ja) * 2013-11-05 2015-05-11 トヨタ自動車株式会社 車両用音声認識装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB410322A (en) * 1933-05-31 1934-05-17 Daniel James Moran Pump assemblies
DE2211675A1 (de) * 1972-03-10 1973-09-13 Pierburg Autogeraetebau Kg Baueinheit von elektromotor und zellenpumpe zur brennstoff-foerderung
FR2342416A1 (fr) * 1976-02-27 1977-09-23 Materiel Telephonique Pompe centrifuge multicellulaire auto-amorcante
DE2709673A1 (de) * 1977-03-05 1978-09-07 Licentia Gmbh Mit einer axialen lagerflaeche versehene lagerkalotte

Also Published As

Publication number Publication date
ES484345A1 (es) 1980-05-16
FR2436898B1 (da) 1982-05-14
EP0009449A1 (fr) 1980-04-02
DK394179A (da) 1980-03-23
FR2436898A1 (fr) 1980-04-18

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