EP1201931A2 - Gleitlager für eine Kreiselpumpe - Google Patents

Gleitlager für eine Kreiselpumpe Download PDF

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Publication number
EP1201931A2
EP1201931A2 EP01204014A EP01204014A EP1201931A2 EP 1201931 A2 EP1201931 A2 EP 1201931A2 EP 01204014 A EP01204014 A EP 01204014A EP 01204014 A EP01204014 A EP 01204014A EP 1201931 A2 EP1201931 A2 EP 1201931A2
Authority
EP
European Patent Office
Prior art keywords
aforementioned
ring
impeller
pump
case
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Withdrawn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
EP01204014A
Other languages
English (en)
French (fr)
Other versions
EP1201931A3 (de
Inventor
Edoardo Garibotti
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.)
Tmp SpA Termomeccanica Pompe
Original Assignee
Tmp SpA Termomeccanica Pompe
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 Tmp SpA Termomeccanica Pompe filed Critical Tmp SpA Termomeccanica Pompe
Publication of EP1201931A2 publication Critical patent/EP1201931A2/de
Publication of EP1201931A3 publication Critical patent/EP1201931A3/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Withdrawn legal-status Critical Current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
    • F04D29/041—Axial thrust balancing
    • F04D29/0413—Axial thrust balancing hydrostatic; hydrodynamic thrust bearings

Definitions

  • the object of the present invention is a protection device for centrifugal pumps with a vertical axis.
  • the purpose of the present invention is, therefore, to provide a device which eliminates this drawback, foreseeing, indeed, a device which allows said pump to start up, run and stop in dry conditions without being damaged.
  • a protection device for centrifugal pumps with a vertical axis where the aforementioned pump comprises a case which contains a shaft, with the pump also comprising an impeller connected to said shaft and free to rotate inside said case, characterised in that the aforementioned device comprises a first ring, which is mobile in rotation with the aforementioned impeller and a second ring, in a fixed position with respect to the case, so that the sliding contact between the aforementioned first and second ring allows the dry operation of the centrifugal pump.
  • the protection device for centrifugal pumps is applied to a pump which comprises a case or pump body 5 containing a shaft 21.
  • the pump also comprises an impeller 3, connected to the shaft 21 and free to rotate inside the case 5.
  • the device 20 comprises a first ring 1, fixed upon the hub of the impeller 3 and a second ring 2, in a fixed position on the case 5.
  • the second ring 2 is fixed to the closing lid 4 of the case 5, while the impeller 3 is provided with a wear ring 6.
  • a first holding member 13 is associated with the impeller 3, and a first ring 1 is integral with said member 13.
  • a second holding member 12 is associated with the lower lid 4 of the pump, and the second ring 2 is integral with said member 12.
  • the first and the second ring are of the removable type.
  • a plurality of screws 14, arranged on the hub of the impeller 3, allows a simple replacement of the first holding member 13 during the pump's maintenance operations; in the same way a plurality of screws 15, arranged on the closing lid 4 allows a simple replacement of the second holding member 12.
  • At least one of the two rings is made of self-lubricating material with a very low friction coefficient.
  • At least one of the two rings is made of a very hard material with a mirror-shine finish of the sliding face.
  • the ring 1 made of very hard material, with a mirror-shine finish and an excellent resistance to wear, guarantees an excellent duration and operation.
  • the ring 2 made of self-lubricating material with an extremely low friction coefficient, or alternatively made of very hard material with a mirror-shine finish guarantees favourable conditions for dry operation.
  • Such a device substantially takes on the characteristics of an axial sliding bearing.
  • the device of the invention can, for example, be installed in centrifugal pumps with a vertical axis, provided with wear rings with radial surfaces and a simple inlet.
  • It can also be installed in centrifugal pumps with a vertical axis, provided with wear rings with a radial surface and a double inlet.
  • the device of the invention allows the pump to start up, run and stop in dry working conditions without incurring damage of any sort.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP01204014A 2000-10-23 2001-10-22 Gleitlager für eine Kreiselpumpe Withdrawn EP1201931A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20002290 IT1319022B1 (it) 2000-10-23 2000-10-23 Dispositivo di protezione per pompe centrifughe ad asse verticale
ITMI002290 2000-10-23

Publications (2)

Publication Number Publication Date
EP1201931A2 true EP1201931A2 (de) 2002-05-02
EP1201931A3 EP1201931A3 (de) 2005-06-08

Family

ID=11446018

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01204014A Withdrawn EP1201931A3 (de) 2000-10-23 2001-10-22 Gleitlager für eine Kreiselpumpe

Country Status (2)

Country Link
EP (1) EP1201931A3 (de)
IT (1) IT1319022B1 (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29503755U1 (de) * 1995-03-08 1995-04-20 Grundfos As Flüssigkeitsgeschmiertes Axialgleitlager
DE19618767A1 (de) * 1996-05-10 1997-11-13 Wilo Gmbh Selbsteinstellendes Axiallager für Hochdruckkreiselpumpen
US5765950A (en) * 1996-11-29 1998-06-16 Goulds Pumps, Incorporated Thrust bearing assembly
US6106224A (en) * 1998-04-02 2000-08-22 Camco International Inc. Downthrust pads for submersible centrifugal pumps

Also Published As

Publication number Publication date
EP1201931A3 (de) 2005-06-08
ITMI20002290A1 (it) 2002-04-23
IT1319022B1 (it) 2003-09-19

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