EP1092877B1 - Pompe équilibrée avec aspiration et refoulement co-axiaux - Google Patents

Pompe équilibrée avec aspiration et refoulement co-axiaux Download PDF

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Publication number
EP1092877B1
EP1092877B1 EP00203553A EP00203553A EP1092877B1 EP 1092877 B1 EP1092877 B1 EP 1092877B1 EP 00203553 A EP00203553 A EP 00203553A EP 00203553 A EP00203553 A EP 00203553A EP 1092877 B1 EP1092877 B1 EP 1092877B1
Authority
EP
European Patent Office
Prior art keywords
impeller
ring
shell
pump
balanced pump
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 - Lifetime
Application number
EP00203553A
Other languages
German (de)
English (en)
Other versions
EP1092877A2 (fr
EP1092877A3 (fr
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 EP1092877A2 publication Critical patent/EP1092877A2/fr
Publication of EP1092877A3 publication Critical patent/EP1092877A3/fr
Application granted granted Critical
Publication of EP1092877B1 publication Critical patent/EP1092877B1/fr
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
    • 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
    • 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
    • F04D29/0416—Axial thrust balancing balancing pistons
    • 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
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/165—Sealings between pressure and suction sides especially adapted for liquid pumps
    • F04D29/167—Sealings between pressure and suction sides especially adapted for liquid pumps of a centrifugal flow wheel
    • 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 balanced pump with suction and delivery on the same axis.
  • Such a pump is particularly beneficial in the naval field owing to the complicated position, which leaves restricted operating spaces available.
  • the object of the present invention is therefore to provide a pump of the aforesaid type with regular deterioration of the wear rings and which does not require repeated and frequent replacement operations.
  • a further object is to provide a pump that in any case is of extremely simple construction, although with excellent seal and outstanding operation.
  • the pump 11 comprises a shell 12 with fixed to the top, in line with a flanged part 15, a drive mechanism 16, such as an electric motor, a diesel motor, a turbine, etc..
  • a lower part of the shell 12 is open 17 to house a lower cover 18 which is fixed to the shell itself by means of bolts 14.
  • the shell 12 also has a suction port 19 on one side and a delivery port 20 on the other side. From the upper drive mechanism 16 a driving shaft 21 extends inside the shell 12; this fits into a cupped end part 22 of control shaft 23 for an impeller 24.
  • the driving shaft 21 is anchored axially to the control shaft 23 by means of a key 25 and fastened by a grub screw 30, thus preventing it from sliding downward.
  • the control shaft 23 rotates the impeller 24 integrally by means of a splined coupling device 26; in fact, the impeller 24 is free to disengage and slide axially, both during operation and when the lower cover 18 is removed.
  • the shaft 23 can in any case be replaced by extending the shaft 21 of the drive mechanism 16, wherever the use of special material for the shaft 23 is not required.
  • the top part of the impeller 24 is equipped with upper wear rings 31 facing outwards on radial surfaces which collaborate with other upper wear rings 32 integral to the shell 12.
  • the wear rings 31 and 32 can be provided under the form of rings in a wear-resistant material, either fitted subsequently or integral, placed opposite one another. The presence of radial rings prevents damage to the pump parts.
  • an other lower wear ring 51 for example in stainless steel, integral to the lower cover 18, is provided in a ring seat 50.
  • a first stainless steel ring 53 is positioned, to support a lower ring 54, with larger outward radial dimensions, for example in antifriction material.
  • the facing surfaces of the two rings 53 and 54 are joined together with a bonding agent (not shown).
  • rings 51 and 54 may have a similar maximum diameter and in any case projecting in relation to the maximum overall dimensions of the supporting surface 52.
  • a shaped fixed ring 56 is provided, which surrounds the free perimetric ends of these rings 51 and 54 with an extension 57 facing inward according to a radial direction.
  • This shaped ring 56 may be made of stainless steel and establishes a labyrinth passage for the pumped fluid that attempts to flow between the cover 18 and the lower central part of the impeller 24.
  • the shaped ring 56 is a balancing element that regulates the inflow of fluid and stabilises the pressure acting on the impeller from below and tending to move this upward.
  • the shaped ring 56 may be fastened to the cover 18 by means of a series of radial grub screws 58.
  • a cap 59 is fitted that can be anchored to a lower hole 60 made in the lower central part of the impeller 24.
  • This stainless steel cap 59 can also collaborate centrally with a disc 33, facing upward or towards the lower end of the control shaft 23, which in this case is covered. In this way it may be used in the event of accidental breakage of the shaft to avoid direct contact with the lower cover 18, thus preventing further damage to the entire pump.
  • the impeller 24 may thus be overhauled or replaced, as may any wear ring with excessive wear.
  • the balancing of thrust permits maintenance of axiality and precise alignment of the moving parts inside the shell 12.
  • Impeller thrusts are absorbed by the radial wear rings and by the lower central part between the cover and the impeller which centre the pump components with improved performance.
  • FIG. 3 shows a second example of the pump according to the invention, particularly suitable for dry start-up.
  • the same reference numbers are used for the same components.
  • the other lower wear ring 51 integral to the cover 18 has been eliminated, while the layout of the rings 53 and 54 integral to the impeller 24 has been maintained.
  • the impeller 24 is integral to the control shaft 23 by means of a bolt 61 screwed into a hole 62 in the shaft 23, after having been fitted in a through hole 67 in the base of the impeller itself 24.
  • the presence of the shaped ring 56 establishes in any case a labyrinth passage for the pumped fluid which collaborates in the correct positioning of the impeller 24 during operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • External Artificial Organs (AREA)

Claims (11)

  1. Pompe équilibrée simple à démonter, avec aspiration et refoulement sur le même axe, comprenant une coquille (12) contenant une roue (24) à laquelle est reliée un dispositif d'entraînement (16), un côté de la coquille présentant un orifice d'aspiration (19) et un autre côté de la coquille présentant un orifice de refoulement (20) positionné sur le même axe, dans laquelle la coquille (12) comprend un couvercle (18) qui peut être librement retiré par le dessous, puisque la coquille est conçue pour être surélevée au niveau d'une partie de celle-ci ouverte sur le côté, la roue (24) étant également munie d'une bague d'usure supérieure de roue (31) et d'une bague d'usure inférieure de roue (54) tournées vers l'extérieur sur des surfaces radiales qui collaborent avec une autre bague d'usure supérieure (32) d'un seul tenant avec ladite coquille (12) et/ou une autre bague d'usure inférieure (51), d'un seul tenant avec ledit couvercle inférieur (18) respectivement, caractérisée en ce que des extrémités périmétriques libres de ladite bague d'usure inférieure de roue (54) ou des deux dites bagues d'usure inférieures de roue (54) et de ladite autre bague d'usure inférieure (51) sont partiellement couvertes et enveloppées par une bague fixe formée (56, 57) qui établit un passage en labyrinthe pour un fluide pompé.
  2. Pompe équilibrée selon la revendication 1, caractérisée en ce que ladite bague fixe formée comprend une partie de bague (56) fixée au dit couvercle (18) et une extension (57) tournée vers l'intérieur selon un sens radial.
  3. Pompe équilibrée selon la revendication 1, caractérisée en ce que ladite bague formée (56, 57) est fixée au dit couvercle (18) au moyen d'une série de vis sans tête radiales (58).
  4. Pompe équilibrée selon la revendication 1, caractérisée en ce qu'une bague en acier inoxydable (53) est positionnée entre ladite roue (24) et ladite bague d'usure inférieure (54).
  5. Pompe équilibrée selon la revendication 1, caractérisée en ce que ladite bague d'usure inférieure (54) et ladite bague en acier inoxydable (53) ne sont attachées qu'à ladite roue (24) et en ce qu'aucune bague d'usure d'un seul tenant avec ledit couvercle n'est prévue.
  6. Pompe équilibrée selon la revendication 1, caractérisée en ce que ladite bague d'usure inférieure (54) et ladite autre bague d'usure inférieure (51) s'étendent à un diamètre maximal par rapport aux dimensions générales d'une surface de support (52) positionnée sur ladite roue (24).
  7. Pompe équilibrée selon la revendication 1, caractérisée en ce qu'une extrémité inférieure d'un arbre (23) faisant saillie à partir dudit dispositif d'entraînement (16) ainsi que ladite roue (24) sont reliées par un couplage moleté (26).
  8. Pompe équilibrée selon la revendication 7, caractérisée en ce que ladite roue (24) est munie d'un orifice inférieur (60) pour recevoir un bouchon (59) qui peut être librement ancré à celui-ci.
  9. Pompe équilibrée selon la revendication 1, caractérisée en ce que ladite roue (24) est munie d'un orifice inférieur (67) à travers lequel un boulon (61) avec des garnitures d'étanchéité (63, 64) est adapté pour rendre ladite roue (24) d'un seul tenant avec un arbre de commande (23) faisant saillie à partir dudit dispositif d'entraînement (16).
  10. Pompe équilibrée selon la revendication 9, caractérisée en ce que ledit boulon (61) peut être retiré en déplaçant une protection (65) prévue pour obturer une ouverture (66) effectuée dans ledit couvercle (18).
  11. Pompe équilibrée selon la revendication 1, caractérisée en ce que lesdites bagues d'usure supérieure, inférieure, autre bague d'usure supérieure et autre bague d'usure inférieure (31, 32, 54, 51) sont du type amovible.
EP00203553A 1999-10-15 2000-10-12 Pompe équilibrée avec aspiration et refoulement co-axiaux Expired - Lifetime EP1092877B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1999MI000626U ITMI990626U1 (it) 1999-10-15 1999-10-15 Pompa bilanciata con aspirazione e mandata sullo stesso asse
ITMI990626U 1999-10-15

Publications (3)

Publication Number Publication Date
EP1092877A2 EP1092877A2 (fr) 2001-04-18
EP1092877A3 EP1092877A3 (fr) 2001-05-16
EP1092877B1 true EP1092877B1 (fr) 2006-03-08

Family

ID=11382460

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00203553A Expired - Lifetime EP1092877B1 (fr) 1999-10-15 2000-10-12 Pompe équilibrée avec aspiration et refoulement co-axiaux

Country Status (4)

Country Link
EP (1) EP1092877B1 (fr)
AT (1) ATE319937T1 (fr)
DE (1) DE60026446T2 (fr)
IT (1) ITMI990626U1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2911166B1 (fr) * 2007-01-09 2012-08-03 Siebec Soc Pompe a entrainement magnetique et etancheite coulissante
EP3171033A1 (fr) * 2015-11-19 2017-05-24 Grundfos Holding A/S Pompe centrifuge à étages multiples avec ouverture de carter pour la maintenance d'un piston d'équilibrage de poussée axiale
DE102016210516A1 (de) * 2016-06-14 2017-12-14 Mahle International Gmbh Flüssigkeitspumpe

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2250306A (en) * 1939-05-15 1941-07-22 Bour Harry E La Vertical pump and mounting
FR2409406A1 (fr) * 1977-11-22 1979-06-15 Air Liquide Procede de realisation des etancheites interne et de sortie d'arbre d'une pompe et pompe mettant en oeuvre ce procede
ITMI981570A1 (it) * 1998-07-09 2000-01-09 Termomeccanica S P A Pompa con aspirazione e mandata sullo stesso asse a semplice smontaggio

Also Published As

Publication number Publication date
DE60026446D1 (de) 2006-05-04
DE60026446T2 (de) 2006-11-09
ITMI990626U1 (it) 2001-04-15
ATE319937T1 (de) 2006-03-15
EP1092877A2 (fr) 2001-04-18
ITMI990626V0 (it) 1999-10-15
EP1092877A3 (fr) 2001-05-16

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