EP1813819B1 - Pompe centrifuge - Google Patents

Pompe centrifuge Download PDF

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Publication number
EP1813819B1
EP1813819B1 EP07000756A EP07000756A EP1813819B1 EP 1813819 B1 EP1813819 B1 EP 1813819B1 EP 07000756 A EP07000756 A EP 07000756A EP 07000756 A EP07000756 A EP 07000756A EP 1813819 B1 EP1813819 B1 EP 1813819B1
Authority
EP
European Patent Office
Prior art keywords
impeller
centrifugal pump
shaft
sealing disc
sealing
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.)
Active
Application number
EP07000756A
Other languages
German (de)
English (en)
Other versions
EP1813819A2 (fr
EP1813819A3 (fr
Inventor
Roland Stracke
Helmut Rückwardt
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 SE
Original Assignee
Wilo SE
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 Wilo SE filed Critical Wilo SE
Publication of EP1813819A2 publication Critical patent/EP1813819A2/fr
Publication of EP1813819A3 publication Critical patent/EP1813819A3/fr
Application granted granted Critical
Publication of EP1813819B1 publication Critical patent/EP1813819B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/12—Shaft sealings using sealing-rings
    • F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps
    • F04D29/128—Shaft sealings using sealing-rings especially adapted for liquid pumps with special means for adducting cooling or sealing fluid
    • 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
    • F04D29/10—Shaft sealings
    • F04D29/106—Shaft sealings especially adapted for liquid pumps

Definitions

  • the invention relates to a centrifugal pump with an impeller, which sits on one end of a motor-driven shaft, wherein a mechanical seal on the side facing away from the impeller inlet side of the impeller surrounds the shaft.
  • the object of the invention is to improve a centrifugal pump of the type mentioned so that optimal cooling and lubrication is ensured and in this case the solids, in particular suspended parts are safely dissipated.
  • the partial flow through the seal chamber dissipates heat and solids, or suspended particles from the seal chamber, and also ensures optimum lubrication of the mechanical seal. It is created with regard to cooling, rinsing and cleaning an optimal environment for the mechanical seal.
  • the passage channel is formed by at least one longitudinal recess, in particular a longitudinal groove, in the outer jacket of the shaft. It is also advantageous if the passage between the shaft and the central opening of the sealing disc is arranged.
  • the pressure side of the pump can in particular be sealed to the sealing space through the sealing disk, wherein the partition between the pressure side, in particular the pressure chamber and the seal chamber has a particular annular opening which is closed in particular closed by a region of the sealing disc.
  • the pressure of the pump pressure chamber bears against the sealing disk, on the side facing the impeller, so that the sealing disk presses the impeller in a direction over the shaft, which counteracts the pull of the impeller caused by the suction of the liquid into the impeller he follows.
  • the sealing disk on the side facing away from the impeller has at least one groove which leads from the outer edge of the disk to the passage of the sealing disk. It is preferably proposed that the sealing disc has a particular annular contact surface for the mechanical seal.
  • the housing 1 of a centrifugal pump 2 forms a pump chamber 3, in which an impeller 4 is mounted, which is fixed to one end of a shaft 5, which is driven by an electric motor, not shown.
  • the impeller 4 has a coaxial inlet 6, with which the impeller from an inlet channel 7 sucks the liquid, which is connected to a suction nozzle 8.
  • the sucked from the inlet 6 liquid is pushed out through impeller blade 9 from the impeller circumference, in a pressure chamber 10 and from there via a pressure channel to a discharge nozzle 11.
  • a mechanical seal 12 On the side facing away from the inlet 6 of the impeller 4 sits on the shaft 5, a mechanical seal 12, the surrounded by a mechanical seal space 13 annular.
  • the mechanical seal chamber 13 is connected to the pressure chamber 10 via a channel 22, which starts from the pressure chamber 10 and opens into the space 13.
  • a circular sealing disc 14 coaxially mounted on the shaft 5 rotatably, so that it rotates with the shaft 5.
  • the sealing disc 14 is located on one side on the back of the impeller, or on a coaxially projecting sleeve-shaped nozzle 15 of the impeller 4, and with its other side to a coaxial annular shoulder of the shaft 5, so that it is axially immovable against the shaft 5 is stuck on this.
  • the sealing disc 14 has a central opening 16, with which it sits positively on the shaft 5.
  • this opening 16 has at least one passage opening which allows the liquid to pass from the mechanical seal chamber 13 via a longitudinal channel 17, in particular a longitudinal groove, to the inlet 6 or the inlet opening of the rotor 4.
  • This flow leading from the mechanical seal chamber 13 to the inlet 6 is further improved by the fact that the sealing disk has at least one groove 18 on the side facing away from the rotor, which groove leads from the outer edge of the sealing disk 14 to the passage of the sealing disk.
  • two semicircular grooves 18 are arranged near the edge of the disk, with their end in each case merging in a radial region which leads to the passage 19.
  • the sealing disc 14 has an inner annular abutment surface 20 in which the mechanical seal 12 abuts and which is interrupted only by the one or more end portions 18a of the grooves 18 of the sealing washer 14, these Nutenend Schemee 18a are arranged approximately radially to the outer ring or partially annular groove area to connect with the opening 16 and the longitudinal channel 17.
  • the sliding ring sealing space 13 is connected to the pressure chamber 10 via an annular coaxial opening 19 when the sealing disc 14 is missing.
  • the sealing disc 14 closes this opening 19, so that the pressure in the pressure chamber 10 rests against the impeller 4 facing side of the sealing disc 14.
  • the sealing disk 14 is pressed by the pressure in the pressure chamber 10 in the direction of the electric motor and thus exerted a pressure on the impeller 4 via the shaft 5 in the same direction. This pressure is opposite to the force that generates the impeller 4 during the suction of the liquid.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Reciprocating Pumps (AREA)

Claims (8)

  1. Pompe centrifuge (2) pourvue d' un rotor (4) monté sur une extrémité d'un arbre (5) motorisé, une garniture étanche à anneau glissant (12) entourant l'arbre sur le côté du rotor opposé à l'admission (6) du rotor, et la garniture étanche à anneau glissant (12) étant entourée par un espace d'étanchéité (13), balayé par un courant partiel du liquide refoulé, caractérisée en ce que
    - un disque d'étanchéité rotatif (14) est fixé sur l'arbre (5) dans la direction axiale entre le rotor (4) et la garniture étanche à anneau glissant (12),
    - le disque d'étanchéité (14) provoque une force axiale opposée à la force de traction axiale du rotor (4), et
    - le disque d'étanchéité (14) présente, pour le courant partiel de liquide, au moins un passage (19) raccordé à au moins un canal de passage (17), qui mène à l'admission (6) du rotor.
  2. Pompe centrifuge (2) suivant la revendication 1, caractérisée en ce que le canal de passage (17) est formé par au moins un creux longitudinal, en particulier une gorge longitudinale, dans l'enveloppe de l'arbre (5).
  3. Pompe centrifuge (2) suivant l'une des revendications 1 et 2, caractérisée en ce que le passage (19) est disposé entre l'arbre (5) et l'ouverture centrale (16) du disque d'étanchéité (14).
  4. Pompe centrifuge (2) suivant l'une des revendications précédentes, caractérisée en ce que le courant partiel, s'écoulant au travers de l'espace d'étanchéité (13), est en dérivation du côté refoulement de la pompe.
  5. Pompe centrifuge (2) suivant l'une des revendications précédentes, caractérisée en ce que le côté refoulement de la pompe, en particulier un compartiment de refoulement (10), est étanchéifié en direction de l'espace d'étanchéité par le disque d'étanchéité (14).
  6. Pompe centrifuge (2) suivant la revendication 5, caractérisée en ce que la cloison (21) entre le côté refoulement, en particulier le compartiment de refoulement (10), et l'espace d'étanchéité (13) présente une ouverture (19) en particulier annulaire, qui est fermée, en particulier remplie, par une zone du disque d'étanchéité (14).
  7. Pompe centrifuge suivant l'une des revendications précédentes, caractérisée en ce que le disque d'étanchéité (14) présente, sur le côté opposé au rotor (4), au moins une gorge (18) qui mène du bord extérieur du disque d'étanchéité (14) au passage (19) de ce dernier.
  8. Pompe centrifuge suivant l'une des revendications précédentes, caractérisée en ce que le disque d'étanchéité (14) présente un surface de contact (20), en particulier annulaire, pour la garniture étanche à anneau glissant (12).
EP07000756A 2006-01-31 2007-01-16 Pompe centrifuge Active EP1813819B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006004266A DE102006004266A1 (de) 2006-01-31 2006-01-31 Kreiselpumpe

Publications (3)

Publication Number Publication Date
EP1813819A2 EP1813819A2 (fr) 2007-08-01
EP1813819A3 EP1813819A3 (fr) 2008-02-27
EP1813819B1 true EP1813819B1 (fr) 2011-04-27

Family

ID=38024250

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07000756A Active EP1813819B1 (fr) 2006-01-31 2007-01-16 Pompe centrifuge

Country Status (3)

Country Link
EP (1) EP1813819B1 (fr)
AT (1) ATE507395T1 (fr)
DE (2) DE102006004266A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113202809A (zh) * 2021-05-22 2021-08-03 中国计量大学 一种不会对外泄漏泵内输送液体分子的全密封型水泵的结构
CN113357186A (zh) * 2021-05-22 2021-09-07 中国计量大学 一种全密封型水泵的结构
CN113236599A (zh) * 2021-05-22 2021-08-10 中国计量大学 不外泄泵内被输送液体分子的且扬程全由电机决定的化工泵结构

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1120231A (en) * 1964-07-08 1968-07-17 Worthington Simpson Rotary pumps
DE2914652A1 (de) * 1979-04-11 1980-10-30 Kloeckner Humboldt Deutz Ag Verstellbares mikrofilmkartenlesegeraet
DE3432662C2 (de) * 1984-09-05 1986-10-16 Tanabe Machinery Co., Ltd., Tokio/Tokyo Vorrichtung zum Erfassen eines Sollmaßes eines Schachtelzuschnittes für eine Schachtelherstellungsmaschine
DE3438662C2 (de) * 1984-10-22 1997-01-30 Sihi Gmbh & Co Kg Kreiselpumpe für heiße Medien
DE8601166U1 (de) * 1986-01-18 1986-02-27 Sihi Gmbh & Co Kg, 2210 Itzehoe Pumpe zur Förderung von Heißwasser
DE8627766U1 (de) * 1986-10-17 1988-02-11 Sihi Gmbh & Co Kg, 2210 Itzehoe Kreiselpumpe
DE3825799A1 (de) * 1988-07-29 1990-02-01 Messer Griesheim Gmbh Kreiselpumpe
DE3914652A1 (de) * 1989-05-03 1990-11-08 Sihi Gmbh & Co Kg Kreiselpumpe
CA2015777C (fr) * 1990-04-30 1993-10-12 Lynn P. Tessier Pompe centrifuge
GB2290113B (en) * 1994-05-31 1998-07-15 Ingersoll Dresser Pump Co Centrifugal pump

Also Published As

Publication number Publication date
DE102006004266A1 (de) 2007-08-02
DE502007007033D1 (de) 2011-06-09
ATE507395T1 (de) 2011-05-15
EP1813819A2 (fr) 2007-08-01
EP1813819A3 (fr) 2008-02-27

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