EP1331399A1 - Gleitlager mit schwimmenden Lagerschalen für eine Kreiselpumpe - Google Patents

Gleitlager mit schwimmenden Lagerschalen für eine Kreiselpumpe Download PDF

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Publication number
EP1331399A1
EP1331399A1 EP03290029A EP03290029A EP1331399A1 EP 1331399 A1 EP1331399 A1 EP 1331399A1 EP 03290029 A EP03290029 A EP 03290029A EP 03290029 A EP03290029 A EP 03290029A EP 1331399 A1 EP1331399 A1 EP 1331399A1
Authority
EP
European Patent Office
Prior art keywords
bearing
inner ring
shaft
ring
bearing 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.)
Withdrawn
Application number
EP03290029A
Other languages
English (en)
French (fr)
Inventor
Michel Caigny
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.)
KSB SAS
Original Assignee
KSB SAS
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 KSB SAS filed Critical KSB SAS
Publication of EP1331399A1 publication Critical patent/EP1331399A1/de
Withdrawn legal-status Critical Current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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • F04D29/0465—Ceramic bearing designs
    • 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
    • F04D1/063—Multi-stage pumps of the vertically split casing type
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • F04D29/047—Bearings hydrostatic; hydrodynamic
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • F04D29/049—Roller bearings

Definitions

  • Multicell pump includes a stack of impellers integral in rotation with a common shaft by means of at least one bearing. Each wheel is inserted into a diffuser. The diffusers are held together by forming a fixed pump body by means of support which are usually tie rods.
  • the bearing includes a ring interior of a material having a first hardness, in particular of sintered materials, such as carbides or graphite. The inner ring is integral in rotation with the shaft.
  • the bearing also includes a ring outer, usually of the same material of great hardness, which is fixed to the body and which is arranged opposite the inner ring with a certain game.
  • the inner ring and the outer ring rotate one compared to the other at high speed of up to 3500 rpm, they must be made of a material of great hardness so that there is no wear and the friction coefficient remains substantially constant.
  • the such hard materials are necessarily fragile. They are not able to withstand great mechanical stresses, so yet they are subject to such constraints when they transmit the forces applied by clamping means to the wheels axial.
  • There is often a rupture of the inner ring which causes the wheels are released inside the body. The wheels hit the diffusers and destroy themselves. A simple rupture of the bearing thus causes the total destruction of the pump.
  • Document EP 0667 456 discloses a centrifugal pump having a shaft end bearing, having an inner ring integral in rotation with the shaft, an outer ring facing the ring inner, an annular jacket interposed between the inner ring and the tree and having a rim at one end.
  • the bearing also has a clamping ring at the end of the tree.
  • This type of bearing cannot be used as a bearing intermediate in a multicellular pump.
  • this bearing is poorly lubricated and an additional device must be provided, namely the labyrinth (58 ') which ensures the presence of the element lubricant by sucking through the bearing part of the pumped liquid according to a direction of rotation (that of the labyrinth).
  • the labyrinth 58 '
  • the invention remedies these drawbacks by a bearing which can be used as an end bearing as well as an intermediate bearing, which is less subject to destruction, easier to manufacture, better lubricated and which, even when the inner ring seizes up, still retains a certain bearing function.
  • the bearing is as defined in claim 1.
  • the ring interior retains the function of ensuring the consistency of the coefficient of friction and resistance to wear, but it no longer has to provide resistance to axial stress due to the forces applied by the axial clamping means, this function being supported by the shirts which, made up of a less hard and therefore less fragile material, can better assume it.
  • the shirts may be made of metal and are in particular, preferably, stainless steel.
  • the inner ring seizes, without being able to turn by compared to the outer ring, it still has the possibility of turning by compared to shirts, which provides a leveling effect at least of relief. Even if the inner ring breaks, the bearing effect certainly disappears, but the wheels remain held in place by the clamping means. The pump does not destroy itself.
  • the drive means of the inner ring by the shirts is an elastic means, in particular being an O-ring interposed between the radial flanges and the inner ring.
  • This allows to flexibly compensate for dimensional tolerances between the ring inner and liners and thus prevents breakage of the inner ring.
  • a clearance is provided between the two shirts and the inner ring.
  • the present invention also relates to a multicellular pump having a bearing according to the invention.
  • Figure 1 is a partial view in axial section of a pump according to the invention.
  • Figure 2 is an enlarged view of the bearing of the pump of figure 1.
  • the multicell pump shown in Figure 1 includes a stack of wheels 1, integral in rotation with a shaft 2, the wheels being pinched between spacers 3, the shaft is common to all the wheels which are held together by end clamping means, comprising successively, from the inside to the outside, a washer 4 and a nut 5 inchtsserable. By tightening the nut, we tighten the spacers and thus tighten the wheels 1 also via the bearing which will be described in a way more precise below.
  • Each wheel 1 is inserted into a diffuser 6.
  • the diffusers 6 are held together in a pump body by tie rods 7 forming holding means.
  • the bearing itself includes an inner carbide ring 8 of silicon and an outer ring 9 of silicon carbide, fixed to the body 6 and disposed opposite the inner ring 8 with a clearance forming a bearing.
  • the bearing further comprises according to the invention two jackets 10, 11 annular interposed between the shaft 2 and the inner ring 8 made of stainless steel.
  • the shirts 10.11 are threaded end to end at one end 12 and they are provided with the opposite end of a radial rim 13 going outwards.
  • the bearing is semi-floating, in the axis of the shaft and perpendicular to the tree.
  • each shirt In axial section, in a plane parallel to the axis of the shaft (figure 2), each shirt has an L shape with the shortest branch corresponds to edge 13.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP03290029A 2002-01-24 2003-01-07 Gleitlager mit schwimmenden Lagerschalen für eine Kreiselpumpe Withdrawn EP1331399A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0200867 2002-01-24
FR0200867A FR2835020B1 (fr) 2002-01-24 2002-01-24 Pompe multicellulaire a palier semi-flottant

Publications (1)

Publication Number Publication Date
EP1331399A1 true EP1331399A1 (de) 2003-07-30

Family

ID=8871397

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03290029A Withdrawn EP1331399A1 (de) 2002-01-24 2003-01-07 Gleitlager mit schwimmenden Lagerschalen für eine Kreiselpumpe

Country Status (2)

Country Link
EP (1) EP1331399A1 (de)
FR (1) FR2835020B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1596069A3 (de) * 2004-05-10 2010-12-29 Hitachi Industries Co., Ltd. Kreiselpumpe
CN105317729A (zh) * 2014-08-04 2016-02-10 威乐(中国)水泵系统有限公司 滑动轴承和多级离心泵
CN108757544A (zh) * 2018-04-16 2018-11-06 广东永力泵业有限公司 碳化钨滑动轴承外套及水泵

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0492605A1 (de) * 1990-12-27 1992-07-01 Ebara Corporation Wellenbuchse aus Keramik
EP0667456A1 (de) * 1994-02-11 1995-08-16 A. Ahlstrom Corporation Kreiselpumpe

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0492605A1 (de) * 1990-12-27 1992-07-01 Ebara Corporation Wellenbuchse aus Keramik
EP0667456A1 (de) * 1994-02-11 1995-08-16 A. Ahlstrom Corporation Kreiselpumpe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1596069A3 (de) * 2004-05-10 2010-12-29 Hitachi Industries Co., Ltd. Kreiselpumpe
CN105317729A (zh) * 2014-08-04 2016-02-10 威乐(中国)水泵系统有限公司 滑动轴承和多级离心泵
CN108757544A (zh) * 2018-04-16 2018-11-06 广东永力泵业有限公司 碳化钨滑动轴承外套及水泵

Also Published As

Publication number Publication date
FR2835020B1 (fr) 2004-10-08
FR2835020A1 (fr) 2003-07-25

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