EP0484214A1 - Gehäuse einer Druckkammer und Motorpumpe, die ein solches Gehäuse verwendet - Google Patents

Gehäuse einer Druckkammer und Motorpumpe, die ein solches Gehäuse verwendet Download PDF

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Publication number
EP0484214A1
EP0484214A1 EP91402858A EP91402858A EP0484214A1 EP 0484214 A1 EP0484214 A1 EP 0484214A1 EP 91402858 A EP91402858 A EP 91402858A EP 91402858 A EP91402858 A EP 91402858A EP 0484214 A1 EP0484214 A1 EP 0484214A1
Authority
EP
European Patent Office
Prior art keywords
rotor
casing
pump
fixing
chamber body
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
EP91402858A
Other languages
English (en)
French (fr)
Other versions
EP0484214B1 (de
Inventor
Michel Moire
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 Salmson France SAS
Original Assignee
Pompes Salmson SAS
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Filing date
Publication date
Application filed by Pompes Salmson SAS filed Critical Pompes Salmson SAS
Publication of EP0484214A1 publication Critical patent/EP0484214A1/de
Application granted granted Critical
Publication of EP0484214B1 publication Critical patent/EP0484214B1/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
    • F04D13/0606—Canned motor 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
    • F04D29/40—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
    • 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

  • the present invention relates to a pressure chamber body, in particular to a pump body consisting of a rotor casing, in one piece, of generally annular shape centered on the rotor and having: an inlet connection opening out at the center of '' an annular outer face, at least one peripheral outlet connection and an open face intended to be closed by pressing a peripheral rim on a support body, the rotor casing being reinforced by an outer casing which is more resistant and rigid than the rotor casing and resting thereon. It also relates to pump units using such pump bodies.
  • the present invention aims to make it possible to produce pressure chamber bodies such as pump bodies, of plastic material or of composite material (reinforced by fibers) very resistant to corrosion and, where appropriate, to abrasion, and much less expensive to produce than traditional foundry materials and which make it possible to withstand not only the pressure forces but also the mechanical forces of fixing a pump unit to a rigid support and to the stresses caused by the connections of the pump to the fluid circuits served.
  • the outer casing is able to come to bear axially, by a central annular part surrounding said inlet fitting, on the annular outer face of the rotor casing and to come surround at at least partially, the periphery of the rotor casing, excluding the peripheral outlet connection (s), by a connecting part connecting a front support part and the central annular part and said front support part is provided at least two tabs or supports intended to allow the fixing of said outer casing on said support body by fixing members such as screws by applying the rotor casing in a sealed manner, by its peripheral rim, to the body of support.
  • the lugs or supports are each associated with bearing surfaces of the outer casing on a bearing surface provided outside the peripheral rim of the rotor casing.
  • the outer casing is in one piece and its connecting part projects at least two front fixing bosses of said outer casing on an outer support.
  • Each fixing boss has a bore substantially parallel to the rotor axis and capable of receiving a fixing rod such as a bolt or screw.
  • the load of an entire pump set can thus be transmitted to an external support directly by the part of the outer casing which provides the connection between the central annular part of the outer casing and the support body generally constituted by the casing of an electric motor much heavier than the pump itself.
  • the connecting part advantageously has the shape of a bell whose flared central part is crossed by at least one cut open on the front bearing edge and allowing the passage of a peripheral outlet fitting of the rotor casing.
  • the central annular part is crossed by the inlet connector which it surrounds by an open sleeve part which ends on the outside by a flange capable of come to bear on the outer edge of said inlet fitting while allowing free passage of a connecting duct to the inlet fitting.
  • the flange projects slightly inward from an outlet bore formed in the inlet connector, so as to retain axially in position an annular seal disposed in said outlet bore.
  • the monobloc rotor casing being made of a flexible material resistant to corrosion by the liquid conveyed by the pump, for example plastic or fiber-based composite material , it may contain a pump rotor centered and guided on the inside outlet of the inlet fitting and the rotor casing is devoid of any fixing means or fixing accessory such as lug and hole but has an open external face rim capable of cooperating sealingly with a ring for fixing the envelope of the drive motor.
  • the outer casing is made in one piece by molding in a metal, such as an aluminum alloy, capable of receiving self-tapping screws.
  • a pump unit comprising a rotor pump block mounted in cantilever on the shaft of an electric drive motor and an electric motor block consisting of a rotor tube sealingly enclosing the rotor and its bearings and a stator housed in an engine casing
  • the pump rotor mounted on the motor rotor is housed inside a pressure chamber body produced according to the embodiments which have just been described and the monobloc outer casing of which is rigidly fixed to a crown of the motor casing by sealingly applying the rotor casing to the motor casing, so as to delimit a pressure chamber containing the pump rotor and the inside the rotor tube.
  • FIG. 1 There is shown in section in Figure 1 a complete pump unit forming a heating circulator.
  • the pump rotor 1 provided with centrifugal fins la is fixed in rotation and in axial position (by claws) at the end of a rotor shaft 2 which carries the rotor 3 of the electric drive motor 4 of the pump .
  • This electric motor 4 comprises a stator 5 which is sealingly isolated from the rotor 3 by a non-magnetic and non-magnetic metal gap tube 6 and which is surrounded by a rigid metal carcass 7 surmounted by a terminal box 8 and forming an envelope of the motor.
  • Carcass 7 has, on the side of the pump rotor, a ring 7a open on the electric motor and closed in leaktight manner on the stator 5 up to the airgap tube 6 (via the O-ring 10) by a sheet metal flange 9 which engages by its periphery in a centering bore 7b of the crown 7a and which carries a friction bearing 11 ensuring at the same time the axial guidance of the rotor shaft 2.
  • the pump rotor 1 is housed in a pump body 12 intended to form the pump volute and with which it cooperates to generate an overpressure on the fluid normally sucked by a suction pipe 13 and discharged by a discharge pipe 14.
  • the pump body 12 is made up, according to the invention, by the assembly of two monobloc parts: on the one hand, a rotor casing 15 of generally annular shape and centered on the rotor 1 by an inner sleeve 16 and, d on the other hand, an outer casing 17 more resistant and more rigid than the casing 15 and produced here in molded metal alloy, in particular in aluminum alloy.
  • the rotor casing 15 is provided, in the axis, with a connection 18 for inlet of the fluid to be pumped.
  • This connector 18 is formed by a bore 18a formed inside a sleeve 19 which projects in the center of the annular outer face of the rotor casing.
  • the bore 18a is extended outwards by a bore of larger diameter 18b intended to serve as a bearing for an O-ring seal 20 and, inwards, by the inner sleeve 16 which is housed in the inlet bore 21 of the rotor 1 at the inlet of the centrifugal fins 1a.
  • a substantially cylindrical ring-shaped portion 22 of the rotor casing 15 goes towards the metal carcass 7 by surrounding the rotor 1 and ends in an open face 23 (see FIGS. 3 and 4) which comes to bear on respective bearing faces 24 and 25 of the flange 9 and of the carcass 7, the seal being ensured between the face 24 and the flange 9 by interposition of an annular seal.
  • the open face 23 ends in a short section of sleeve 26 which engages inside the centering bore 7b formed in the carcass 7 and which ends in a front face of support provided with a seal.
  • the sleeve section 26 is extended outwards by a shoulder 27 bearing on the face 25 of the carcass 7 which corresponds to a flange 28 projecting over a small height outside the substantially cylindrical ring 22.
  • the face of the rim 28 which looks on the side opposite to the open face 23 is here inclined to provide a carrying surface 29 whose function will be described later.
  • the rotor casing 15 has fluid outlet connections opening onto its periphery.
  • a drain connection 30, closed in service by a threaded plug, is provided at the bottom of the substantially cylindrical part 22.
  • a discharge connection 31 is provided at the upper part of the ring 22 and has a lateral orifice 32 forming a tangential start d a pump casing 33 delimited by an annular rib 34 projecting from the inside and a sleeve connector 31a provided with a cylindrical bore 35 for tightly receiving the discharge pipe 14 fitted, if necessary, with an O-ring 36.
  • the outer casing 17 has a shape complementary to that of the rotor casing 15, centered on the suction opening 18a, 16 and showing a part of the sleeve 38 which surrounds the sleeve 19 and ends in a flange 39 which protrudes slightly beyond the bore 18b of the sleeve 19 to retain the O-ring 20 axially, without however coming into contact with the suction pipe 13.
  • the casing 17 continues after the sleeve 38 by a central annular part 40 which is provided with external ribs 41 and capable of coming to bear axially, directly or as shown, by means of an internal annular rib 40a, on the convex central bearing surface 42 of the annular external face 43, here partially toric , of the rotor casing 15.
  • the annular part 40 continues, opposite the sleeve 38, by a partially toric connecting surface 44 followed by a connecting part 45 in the general shape of a cylindrical ring coming to surround the substantially cylindrical ring 22 of the rotor casing. 15.
  • This part 45 presents cutouts to allow the outlet connections of the casing to open out on the outside 15.
  • a cutout 37 (see FIG. 4) allows the drain connection 30 to protrude outside.
  • a wider cutout 46 see FIGS.
  • the connecting part 45 of generally cylindrical shape, is shaped into two substantially semi-cylindrical parts 45a and 45b (see the two parts indicated on the Figure 4) which end frontally with two flanges 47 and 48 constituting a front support part.
  • the flanges 47 and 48 each have respectively an inner surface 49 and 50 forming a bearing surface intended to cooperate with the carrying surface 29 formed on the flange 28 of the rotor casing 15.
  • a respective tab or support 51, 52 provided with means of attachment to the rigid metal carcass 7 of the motor forming the support body.
  • the fixing means here consist of a hole or bore 53, 54 for the passage of a fixing screw 55, 56 on corresponding lugs 57, 58 of the carcass 7 of the engine, using nuts 59, 60
  • the bores 53, 54 can be replaced by tapped holes directly receiving a fixing screw whose head is disposed on the side of the electric motor 4.
  • Each of the two substantially semicylindrical parts 45a, 45b of the connecting part 45 comprises at least one cylindrical fixing boss 61, 62, 63 (see the three bosses in FIG. 2) coming from one-piece molding with the corresponding connecting part 45a or 45b and with the central annular part 40 continues and reinforced by the ribs 41.
  • Each fixing boss 61, 62, 63 has a central bore 64 substantially parallel to the rotor axis 65.
  • the bore 64 of generally cylindrical shape, the if necessary with a screw engagement pilot hole 66, generally came from the foundry with the outer casing 17 made of an aluminum alloy much stiffer than the rotor casing 15 but relatively softer than steel .
  • Bore 64 is provided a thread into which engages a screw 67 for fixing the motor pump assembly to a support structure 68 such as a boiler body.
  • the rotor casing 15 being made of a relatively soft material, it would be possible to provide smooth bores 64 in which a self-tapping screw would come to engage.
  • the assembly and operation of the motor pump assembly according to the invention will now be described.
  • the entire electric motor being prepared and mounted, it is equipped with the pump rotor 1 mounted in cantilever at the end of the rotor shaft 2.
  • the outer casing 17 surrounds the rotor casing 15 which is thus positioned in rotation by engagement of the peripheral outlet fittings 30 and 31 in the corresponding cutouts 37 and 46.
  • the outer casing 17 is positioned axially with respect to the rotor casing 15 by axial support of the annular rib 34 on the convex surface 42 of the outer annular face 43 of the envelope 15.
  • the bottoms of the cutouts 37 and 46 then come in close proximity to the outer surface of the corresponding fittings 30 and 31 without however coming into contact with them.
  • the flange 39 is placed in the immediate vicinity of the end of the sleeve 19 by axially trapping the O-ring 20.
  • the bearing surfaces 49 and 50 also come in close proximity to the conical bearing surface 29 formed on the flange 28 of the rotor casing 15.
  • the rotor casing 15, thus equipped with its outer casing 17, is then carefully engaged on the rotor 1, taking care that its inner sleeve 16 engages well in the inlet bore 21 of the rotor. pump 1 to center the latter, and for the sleeve section 26 to engage inside the centering bore 7b up to the stop of the seal on the bearing face of the section 26 on the peripheral surface 24 for supporting the flange 9.
  • the pressure chamber 69 containing the pump rotor 1 is sealed against the stator of the electric motor which is isolated from the rotor by the rotor tube 6 resting on the stator parts via two O-rings (seal 10 and seal 10a).
  • the pump assembly thus mounted includes a flexible pump body inside, to cooperate well with the rotor 1, in a material resistant to the aggression of the transported liquid (here hot water) and not creating electrical torque with the pump rotor also made of composite plastic (generally in two parts welded by friction with ultrasound).
  • the outer casing 17 protects the rotor casing 15 against external mechanical attack and allows it to be rigidly fixed to a support or a support structure, so as to support the external electric cantilever heavier than the pump.
  • the pump body can be engaged axially by its internal bore 18a on the suction pipe 13 already in place, the screws attachment 67 then being screwed into the threaded bore 64 corresponding to the bosses 61, 62 or 63 brought in front of these screws, to the engagement on the suction line 13.
  • the motor pump assembly is rigidly fixed in position on the suction line 13, it is then possible to engage a discharge line 14 provided with its O-ring seal 36, in the cylindrical bore 35 of the discharge connection 31.
  • An annular seal could also be permanently installed in an annular groove formed inside the bore 35.
  • the mounted pump When the mounted pump is operating, it generates an overpressure in the pressure chamber 69 which tends to cause the rotor casing 15 to swell.
  • the latter is surrounded directly, wherever have large sections capable of inducing high pressure stresses, by the rigid outer casing 17. Only are subjected to the action of pressure without the reinforcement of the outer casing 15, the peripheral fittings 30 and 31 which have either extra thicknesses (connector 30), ie reinforcements and ribs (connector 31) allowing them to resist the action of pressure.
  • a first type of pump for example, washing machine drain pumps
  • a second type of manufactured pump uses the rotor casing made of plastic and / or composite material, reinforced by the monobloc outer casing according to the invention to convey fluids under pressures and / or at higher temperatures.
  • the embodiment which has been shown for a single-stage pump with a single rotor can, of course, be used for multi-stage pumps with several rotors in series on the same motor shaft and the electric actuating motor 4 can be replaced by an engine of another type, for example, internal combustion.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Pens And Brushes (AREA)
  • Regulating Braking Force (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Motor Or Generator Frames (AREA)
  • Dry Shavers And Clippers (AREA)
  • Telephone Function (AREA)
  • External Artificial Organs (AREA)
EP91402858A 1990-10-29 1991-10-25 Gehäuse einer Druckkammer und Motorpumpe, die ein solches Gehäuse verwendet Expired - Lifetime EP0484214B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9013361 1990-10-29
FR9013361A FR2668556B1 (fr) 1990-10-29 1990-10-29 Corps de chambre sous pression et groupe motopompe utilisant un tel corps.

Publications (2)

Publication Number Publication Date
EP0484214A1 true EP0484214A1 (de) 1992-05-06
EP0484214B1 EP0484214B1 (de) 1994-12-28

Family

ID=9401642

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91402858A Expired - Lifetime EP0484214B1 (de) 1990-10-29 1991-10-25 Gehäuse einer Druckkammer und Motorpumpe, die ein solches Gehäuse verwendet

Country Status (7)

Country Link
EP (1) EP0484214B1 (de)
AT (1) ATE116408T1 (de)
DE (1) DE69106318T2 (de)
DK (1) DK0484214T3 (de)
ES (1) ES2066397T3 (de)
FR (1) FR2668556B1 (de)
GR (1) GR3015006T3 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0844723A2 (de) * 1996-11-25 1998-05-27 Flender Austria Antriebstechnik Aktiengesellschaft Elektromotorisch angetriebene Pumpe
EP1281870A2 (de) * 2001-08-02 2003-02-05 WILO GmbH Spaltrohrmotorpumpenaggregat

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013221571B4 (de) * 2013-10-23 2016-06-02 BSH Hausgeräte GmbH Haushaltsgerät mit einem Pumpengehäuse
CN106555765A (zh) * 2015-09-30 2017-04-05 杭州三花研究院有限公司 电驱动泵
CN111120339B (zh) * 2019-12-26 2020-10-13 江苏盐邦泵业制造有限公司 一种卧式水泵
CN216111302U (zh) * 2021-08-16 2022-03-22 博西华电器（江苏）有限公司 可输送经加热的流体的泵

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB883624A (en) * 1958-10-06 1961-12-06 Miles Lowell Edwards Tank and replaceable motor driven pump assembly
GB1092533A (en) * 1964-02-27 1967-11-29 Speedwell Res Ltd Improvements relating to pump casings
GB1526940A (en) * 1975-12-18 1978-10-04 British Gas Corp Centrifugal liquid pumps
FR2402785A1 (fr) * 1977-09-07 1979-04-06 Julien & Mege Pompe centrifuge
DE3011888A1 (de) * 1980-03-27 1981-10-01 Richard 7066 Baltmannsweiler Halm Kreiselpumpe
DE3622269A1 (de) * 1986-07-03 1988-01-14 Richard Halm Spaltrohrmotorpumpe

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB883624A (en) * 1958-10-06 1961-12-06 Miles Lowell Edwards Tank and replaceable motor driven pump assembly
GB1092533A (en) * 1964-02-27 1967-11-29 Speedwell Res Ltd Improvements relating to pump casings
GB1526940A (en) * 1975-12-18 1978-10-04 British Gas Corp Centrifugal liquid pumps
FR2402785A1 (fr) * 1977-09-07 1979-04-06 Julien & Mege Pompe centrifuge
DE3011888A1 (de) * 1980-03-27 1981-10-01 Richard 7066 Baltmannsweiler Halm Kreiselpumpe
DE3622269A1 (de) * 1986-07-03 1988-01-14 Richard Halm Spaltrohrmotorpumpe

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0844723A2 (de) * 1996-11-25 1998-05-27 Flender Austria Antriebstechnik Aktiengesellschaft Elektromotorisch angetriebene Pumpe
EP0844723A3 (de) * 1996-11-25 1999-05-06 ATB Austria Antriebstechnik Aktiengesellschaft Elektromotorisch angetriebene Pumpe
EP1281870A2 (de) * 2001-08-02 2003-02-05 WILO GmbH Spaltrohrmotorpumpenaggregat
EP1281870A3 (de) * 2001-08-02 2004-01-07 WILO GmbH Spaltrohrmotorpumpenaggregat

Also Published As

Publication number Publication date
EP0484214B1 (de) 1994-12-28
DE69106318D1 (de) 1995-02-09
DK0484214T3 (da) 1995-03-20
FR2668556B1 (fr) 1995-01-27
FR2668556A1 (fr) 1992-04-30
ES2066397T3 (es) 1995-03-01
GR3015006T3 (en) 1995-05-31
DE69106318T2 (de) 1995-05-18
ATE116408T1 (de) 1995-01-15

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