EP0112462B1 - Pompe centrifuge autonettoyante - Google Patents

Pompe centrifuge autonettoyante Download PDF

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Publication number
EP0112462B1
EP0112462B1 EP83110748A EP83110748A EP0112462B1 EP 0112462 B1 EP0112462 B1 EP 0112462B1 EP 83110748 A EP83110748 A EP 83110748A EP 83110748 A EP83110748 A EP 83110748A EP 0112462 B1 EP0112462 B1 EP 0112462B1
Authority
EP
European Patent Office
Prior art keywords
pump
sealing ring
pocket
hub
drive shaft
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
Application number
EP83110748A
Other languages
German (de)
English (en)
Other versions
EP0112462A1 (fr
Inventor
Frank John Cantor
Robert Perry Horwitz
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.)
ITT Inc
Original Assignee
ITT Industries Inc
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 ITT Industries Inc filed Critical ITT Industries Inc
Publication of EP0112462A1 publication Critical patent/EP0112462A1/fr
Application granted granted Critical
Publication of EP0112462B1 publication Critical patent/EP0112462B1/fr
Expired 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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2261—Rotors specially for centrifugal pumps with special measures
    • F04D29/2266—Rotors specially for centrifugal pumps with special measures for sealing or thrust balance

Definitions

  • the present invention relates to a pump for liquids, in particular a self-cleaning pump of the type used for the hygienic production of food.
  • the centrifugal pump 10 shown in FIG. 1 is used in systems for the hygienic production of food.
  • the pump 10 consists of a housing 12 which has a central inlet 14 and a projecting outlet 16 which is integrally formed on the screw 18 of the housing 12.
  • a rear plate 20 closes the rear part of the housing 12.
  • the housing 12 and the rear plate 20 are connected to an adapter ring 22 by an annular bracket 24.
  • the adapter ring 22 is attached to the housing 25 of a motor 26.
  • a stub of the drive shaft 28 is attached to the motor shaft 30 by a key 32 which is within a keyway 34 in the motor shaft 30 and within a corresponding keyway 36 which is formed in the inner surface of the stub shaft 28.
  • a number of screws 38 hold the key 32 in the position inserted into the keyway 34.
  • the front end of the stub shaft 28 passes through a central bore 40 in the back plate 20.
  • the paddle wheel 42 of the pump 10 is held on the stub shaft 28 by a nut 44 and a washer 46.
  • a stationary ceramic sealing ring 48 is mounted in a counterbore 50 which is made in the rear side of the plate 20.
  • a sealing washer 52 is arranged between the sealing ring 48 and the wall of the counterbore 50. The sealing ring 48 and the sealing washer 52 are held in the counterbore 50 by a retaining plate 54 in the inserted position, which is secured to the back of the recessed plate 20 by screws 56, only one of which is shown.
  • a coiled spring 62 presses the sealing ring 60 against the sealing ring 48, so that the contact surface 64 between the sealing ring 60 and the sealing ring 48 is sealed.
  • the sealing ring 60 is provided with a radially inwardly extending flange part 66 and with an outwardly extending flange part 68.
  • the inner cylindrical surface 70 of the flange part 66 is in sealing contact with the surface of the shaft end 28.
  • An O-ring 72 is inserted behind the flange part 66 between the sealing ring 60 and the shaft end 28.
  • the coiled spring 62 is provided at one end with a bent section 74, which is inserted into a notch 76, which is embedded in the rear of the outer flange part 68 of the rotating sealing ring 60.
  • the other end of the spring 62 is provided with a bent section 78 which projects into the notch 80 in the stub shaft 28.
  • the hub 82 of the paddle wheel 42 has an annular part 84 which extends backwards and projects into the bore 40 of the plate 20 lying behind.
  • the distance between the wall of the bore 40 and the outer circumferential surface of the annular part 84 located on the rear side of the hub 82, the small distance between the inner, stationary sealing ring 48 and the shaft end 28 and the distance in front of the flange part 66 of the rotating sealing ring 60 below the sealing contact surface 64 form a pocket 86 or a closed space with only one access in which material can get caught from the outside if not enough liquid flows into this area.
  • means are now provided which generate turbulence within the pocket 86 and rinse out the particles which have penetrated into the pocket 86 so that the pump can clean itself, thereby avoiding the need to disassemble the pump for the purpose of cleaning.
  • a few diametrically opposed and axially extending slots 88 are provided in the drive shaft 30 or in the shaft stub 28. These slots 88 extend backward from a shoulder 90 on the stub shaft 28 to the flange part 66 of the rotating sealing ring 60 in the direction below the sealing contact surface 64 between the sealing ring 60 and the sealing ring 48 .
  • a plurality of axially extending bores or openings 96 in the area of the casing 98 of the hub 82 of the paddle wheel 42, in which the vanes 100 are fastened, are just inside the inner edges of the vanes 100 Paddle wheel 42 provided.
  • the openings 96 are preferably equally spaced and distributed around the circumference of the hub 82 of the impeller 42. For example, five openings 96 can be distributed around the circumference of the hub 82 of the impeller 42.
  • the vanes 100 of the paddle wheel 42 also extend in the direction of the plate 20 on the rear side of the casing 98 of the hub 82 of the paddle wheel 42 as protruding parts 102 of the vanes 100 of the paddle wheel 42 into the pocket 86.
  • the openings 96 and the protruding parts 102 the vanes 100 of the paddle wheel 42 together cause a circulating flow of the liquid through the pocket 86 and in the direction of the arrows represented by the openings 96 in FIG. 1. In this way, the pocket 86 is cleaned effectively.
  • the high velocity of the fluid flow through the remaining housing 12 tears the particles out of the pump housing and drives them through the adjacent outlet 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (6)

1. Pompe hydraulique comportant un arbre d'entraînement, ou un embout d'arbre monté sur celui-ci, sur lequel est fixé le moyeu d'une roue à aubes et un carter qui fait office de canal de guidage pour le fluide sous pression et qui entoure de manière étanche l'arbre d'entraînement ou l'embout d'arbre, et dans laquelle une poche est formée dans une paroi du carter à l'endroit de l'étancheité, caractérisé en ce que,
- une fente axiale (88) est creusée dans l'arbre d'entraînement (30) ou dans l'embout d'arbre (28) monté sur celui-ci, et s'étend dans la poche (86),
- le moyeu (82) de la roue à aubes (42) est muni d'un voile (98) dans lequel sont fixées une pluralité d'aubes (100) de façon qu'une partie (102) de celles-ci s'étende depuis l'arrière du voile (98) en direction de la poche (86),
- et en ce qu'il existe un alésage axial, ou une ouverture axiale (96) s'étendant à travers le voile et débouchant dans la poche (86).
2. Pompe selon la revendication 1, caractérisée en ce que la fente axiale (88) s'étende vers l'arrière jusqu'à un premier joint d'étanchéité (60) qui entoure l'arbre d'entraînement (30), ou l'embout d'arbre (28) monté sur celui-ci, et tourne avec ce dernier.
3. Pompe selon l'une des revendications 1 ou 2, caractérisée en ce qu'elle comporte une pluralité de fentes axiales (88), réparties circonférentiellement et espacées l'une de l'autre, creusées dans l'arbre d'entraînement (30) ou dans l'embout d'arbre (28).
4. Pompe selon la revendication 1 caractérisée en ce qu'elle comporte une pluralité d'alésages, ou d'ouvertures, (96) réparties circonférentiellement dans la voile (98) de moyeu (82) et espacées l'une de l'autre.
5. Pompe selon la revendication 1, caractérisée en ce que la poche (86) à nettoyer dans le boîtier (20), dans laquelle des turbulences sont provoquées au moyen de la ou des fente(s) (88), est délimitée par l'arbre d'entraînement (30), ou l'embout d'arbre (28), entouré du jointtournant (60, 64, 66) qui tourne avec ce dernier, un contre-alésage (50) dans lequel sont disposés de manière fixe un second joint d'étanchéité (48) et une garniture d'étancheité (52), une paroi interne d'un alésage (40), et un espace entre une plaque arrière (20) du boîtier (12) et la face arrière du voile (98) du moyeu (82).
6. Pompe selon l'une des revendications 1 à 5, caractérisé en ce que la ou les fente(s) (88) s'étend(ent) jusqu'en dessous d'une surface d'étanchéité (64) entre le second joint d'étanchéité (48) et le premier joint d'étanchéité (60).
EP83110748A 1982-11-01 1983-10-27 Pompe centrifuge autonettoyante Expired EP0112462B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/438,076 US4538959A (en) 1982-11-01 1982-11-01 Clean-in-place pump
US438076 1982-11-01

Publications (2)

Publication Number Publication Date
EP0112462A1 EP0112462A1 (fr) 1984-07-04
EP0112462B1 true EP0112462B1 (fr) 1986-07-16

Family

ID=23739110

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83110748A Expired EP0112462B1 (fr) 1982-11-01 1983-10-27 Pompe centrifuge autonettoyante

Country Status (5)

Country Link
US (1) US4538959A (fr)
EP (1) EP0112462B1 (fr)
JP (1) JPS5999095A (fr)
AU (1) AU557987B2 (fr)
DE (1) DE3364534D1 (fr)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4948336A (en) * 1987-12-10 1990-08-14 Sundstrand Corporation Mechanical shaft seal
JPH04107499U (ja) * 1991-02-27 1992-09-17 アイシン精機株式会社 ウオータポンプ
US5096396A (en) * 1991-03-05 1992-03-17 V. Q. Corporation Rotary apparatus having passageways to clean seal chambers
US5160693A (en) * 1991-09-26 1992-11-03 Eckert Charles E Impeller for treating molten metals
DE4400289C2 (de) * 1994-01-07 2001-07-05 Ksb Ag Kreiselpumpe
US5503521A (en) * 1994-07-14 1996-04-02 Tetra Laval Holdings & Finance S.A. Centrifugal pump
ES2130945B1 (es) * 1996-07-03 2000-02-16 Bombas Electricas Sa Bomba centrifuga de tipo vortice.
JP3545638B2 (ja) * 1999-03-30 2004-07-21 日本ミルクコミュニティ株式会社 回転軸に対するインペラーの取付構造
US6921245B2 (en) * 2003-02-11 2005-07-26 Envirotech Pumpsystems, Inc. Coaxial seal for a pump
CN100449155C (zh) * 2003-08-04 2009-01-07 苏舍泵有限公司 用于泵的叶轮、包括这种叶轮的泵及其工作方法
US20070036660A1 (en) * 2005-08-10 2007-02-15 Envirotech Pumpsystems, Inc. Low-profile impeller bolt
DE102006009495A1 (de) * 2006-02-27 2007-08-30 Oase Gmbh Wasserpumpe
US8221070B2 (en) * 2009-03-25 2012-07-17 Woodward, Inc. Centrifugal impeller with controlled force balance
DE102010050263A1 (de) * 2010-11-02 2012-05-03 Wilo Se Führung des Laternen-Einsteckteils
JP2013189886A (ja) * 2012-03-13 2013-09-26 Hitachi Automotive Systems Ltd ウォータポンプ
AU2014284140A1 (en) 2013-06-21 2016-01-21 Flow Control Llc. Debris removing impeller backvane
CN107567545B (zh) * 2014-10-23 2019-09-03 苏尔寿管理有限公司 泵送液体介质的方法、离心泵及其叶轮
CN105179259B (zh) * 2015-07-07 2017-08-22 君禾泵业股份有限公司 带有清洁装置的高效潜水泵及其清洁方法
JP2019015206A (ja) * 2017-07-05 2019-01-31 日本電産株式会社 羽根車及び送風装置
SE542626C2 (en) * 2018-04-11 2020-06-23 Roplan Holding Ab A pump housing device for a fluid pump, and a fluid pump

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA586433A (fr) * 1959-11-03 J. Klassen John Pompe de renfort submersible en ligne et systeme
US782271A (en) * 1904-04-30 1905-02-14 Henry R Worthington Centrifugal, turbine, or like pump.
US2386898A (en) * 1943-10-30 1945-10-16 Worthington Pump & Mach Corp Centrifugal pump
US2427656A (en) * 1944-08-28 1947-09-23 Byron Jackson Co Pump and shaft seal therefor
US2938661A (en) * 1956-06-13 1960-05-31 Gen Motors Corp Compressor seals
CH390687A (de) * 1961-02-27 1965-04-15 Egger & Co Kreiselpumpe
US3213798A (en) * 1964-03-16 1965-10-26 Ingersoll Rand Co Sealing and cooling device for a pump shaft
JPS4322549Y1 (fr) * 1967-09-28 1968-09-21
US3481273A (en) * 1968-02-26 1969-12-02 Ladish Co Sanitary processing pumps
US3639073A (en) * 1970-04-23 1972-02-01 Sundstrand Corp Centrifugal pump
US3632220A (en) * 1970-08-27 1972-01-04 Chrysler Corp Coolant pump
US3801226A (en) * 1970-08-28 1974-04-02 Goulds Pumps Pump impeller
DE2640990A1 (de) * 1976-09-11 1978-03-16 Klein Schanzlin & Becker Ag Kreiselpumpe mit selbsttaetiger axialschubregelung an einem der laufraeder
DE3026541C2 (de) * 1980-07-12 1985-12-19 Klein, Schanzlin & Becker Ag, 6710 Frankenthal Schmutzabscheider für Strömungsmaschinen
DE3026558C2 (de) * 1980-07-12 1982-09-09 Audi Nsu Auto Union Ag, 7107 Neckarsulm Turbomaschine, insbesondere Abgasturbolader für Brennkraftmaschinen

Also Published As

Publication number Publication date
EP0112462A1 (fr) 1984-07-04
DE3364534D1 (en) 1986-08-21
AU557987B2 (en) 1987-01-15
JPS5999095A (ja) 1984-06-07
AU2069983A (en) 1984-05-10
US4538959A (en) 1985-09-03

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