EP3234371A1 - Roue à aubes de pompe centrifuge - Google Patents

Roue à aubes de pompe centrifuge

Info

Publication number
EP3234371A1
EP3234371A1 EP15813022.9A EP15813022A EP3234371A1 EP 3234371 A1 EP3234371 A1 EP 3234371A1 EP 15813022 A EP15813022 A EP 15813022A EP 3234371 A1 EP3234371 A1 EP 3234371A1
Authority
EP
European Patent Office
Prior art keywords
impeller
centrifugal pump
metallic
hub
hub part
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.)
Granted
Application number
EP15813022.9A
Other languages
German (de)
English (en)
Other versions
EP3234371B1 (fr
Inventor
Ralf Kramme
Christian Schmidt
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 SE and Co KGaA
Original Assignee
KSB AG
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 AG filed Critical KSB AG
Publication of EP3234371A1 publication Critical patent/EP3234371A1/fr
Application granted granted Critical
Publication of EP3234371B1 publication Critical patent/EP3234371B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F04D29/02—Selection of particular materials
    • F04D29/026—Selection of particular materials 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
    • F04D29/18—Rotors
    • F04D29/20—Mounting rotors on shafts
    • 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
    • F04D29/2205—Conventional flow pattern
    • F04D29/2222—Construction and assembly
    • F04D29/2227—Construction and assembly for special materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/30—Retaining components in desired mutual position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/20—Oxide or non-oxide ceramics
    • F05D2300/22—Non-oxide ceramics
    • F05D2300/226—Carbides
    • F05D2300/2261—Carbides of silicon
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
    • F05D2300/603—Composites; e.g. fibre-reinforced
    • F05D2300/6033—Ceramic matrix composites [CMC]

Definitions

  • the invention relates to a Kreiselpumpeniaufrad with a non-metallic impeller part and connected to the impeller part metallic hub part, which is arranged on a shaft.
  • centrifugal pump impellers are usually mounted for a while by being pushed with their hub bore onto a shaft end and pressed by a nut against a collar of the shaft.
  • Such a fastening method is unfavorable in centrifugal pump impellers according to the preamble of the invention, since they comprise a non-metallic impeller part.
  • Many non-metallic materials, such as polymer casting or plastic, tend to flow under pressure.
  • no hub part is used.
  • an intermediate flange is used.
  • This intermediate flange is arranged between the shaft end and the impeller.
  • the impeller and the intermediate flange are provided with a bore, in the bore a bolt is arranged, which is provided at one end with a head and at the other end with a thread on which a nut is screwed. By turning a nut on the thread, the impeller and the intermediate flange are braced against each other.
  • the intermediate flange in turn is connected to the shaft via a screw connection.
  • the shaft is formed at one end with a flange, in which the holes for the screw between flange and shaft are arranged.
  • This construction of the attachment by means of an intermediate flange is very complicated and bulky, since the intermediate flange, in contrast to a Nabenteii is not arranged on the shaft, but is placed at the shaft end between the shaft and the impeller.
  • DE 2 319 463 describes a rotor for a pump for cooling internal combustion engines.
  • the rotor consists of a metallic hub part, which is pushed onto the shaft in a press fit. On this metallic hub part of Laufradteii is poured.
  • the impeller part consists of a thermosetting resin mixture. Also in this construction, a non-detachable, solid bond between hub part and impeller part is made.
  • the object of the invention is to provide a centrifugal pump impeller, which can be repaired inexpensively in the event of signs of wear and tear. In addition, the installation work should be carried out quickly and inexpensively.
  • the centrifugal pump impeller should be able to be manufactured with a low cost and thereby have a high quality.
  • the non-metallic impeller part is not poured around the metallic hub part around. Instead, impeller part and hub part are releasably connected to each other via driver elements.
  • the hub part is preferably an integrally formed metallic component.
  • the driver elements are formed in several parts. Preferably, it is a two-part design.
  • the driver elements preferably each have a sleeve and a connecting element with which a reliable screw connection can be produced.
  • the sleeves are arranged in recesses on an end face, in particular on the welien Schonde front side of the impeller part.
  • the recesses are preferably bores which are introduced into the nonmetallic impeller part, in particular round bores being suitable.
  • a plurality of bores on the front side for example in the region of the Supiatte, the impeller part can be introduced along a circular arrangement.
  • the number of holes corresponds to the number of blades of the impeller part.
  • the depressions are preferably introduced at positions of Rajpiatte, where attack the blades.
  • the sleeves are cast in one end face of the impeller part. This can be dispensed with the operation of drilling.
  • the sleeves have a suitable anti-rotation.
  • the connecting elements are arranged on a ring of the hub part and engage at least partially in the sleeves.
  • the connecting elements are screwed into the sleeves.
  • the connecting elements are screws.
  • the sleeves are provided with an internal thread, in which engages the external thread of the screw designed as connecting elements.
  • the screws preferably have a taper and are placed in bores on the ring of the hub part and then screwed into the sleeves.
  • the holes have complementary countersunk approaches to the cone approaches. This creates a play-free or largely play-free construction, in which the individual parts of the driver elements are detachably connected to each other.
  • a further advantage of the construction according to the invention is that no more stresses occur in the centrifugal pump impeller according to the invention, which occur in conventional centrifugal pump impellers made of polymer casting, due to the different thermal expansion values of impeller part and hub part during pouring.
  • the hub chamber has a projection which projects into the impeller part.
  • This projection is hollow cylindrical and surrounds the shaft. At this hollow cylindrical projection of the hub part is followed by the ring.
  • the ring of the hub part is aligned parallel to the shaft-side end face of the impeller part and abuts against the end face of the impeller part.
  • this extension is followed by an extension, which is likewise hollow-cylindrical and thus surrounds the shaft.
  • the metallic hub part has on its inside at least one groove in which a feather key engages, which establishes a connection between the shaft and hub part for torque transmission.
  • a disk is arranged on a shaft end for fixing the impeller part.
  • the non-metallic impeller part preferably has on the flow side a circular recess into which the disk is positioned.
  • the disc has holes, for example along its circumference. By means of suitable screws, the disc is fastened via the holes on the shaft end. As a result, the hub part and the impeller part are braced against each other.
  • the metallic hub part and the nonmetallic impeller part are connected.
  • the pre-assembled two-piece centrifugal pump impeller is pushed onto the shaft end.
  • impeller part and hub part are braced against each other by means of the disc, which is fastened to the shaft end.
  • a cap is arranged on the flow side of the disk. Since the cap comes into contact with flow medium, it is usually made of a corrosion-resistant material.
  • the impeller part consists in a particularly favorable embodiment of the invention of a ceramic material.
  • a ceramic-plastic composite material is suitable for this purpose. It proves to be particularly advantageous if this comprises silicon carbide particles which are arranged in a polymer matrix.
  • the metallic hub part is preferably made of a duplex stainless steel casting.
  • the method for manufacturing and assembling the circular pump impeller according to the invention comprises the following steps:
  • a screw lock is to be provided.
  • FIG. 1 shows an axial section through the housing of a centrifugal pump with arranged therein centrifugal pump impeller
  • Fig. 3 is an axial section through the centrifugal pump impeller on a shaft end.
  • Fig. 1 shows a centrifugal pump impeller 1, which is arranged in a housing 2 of a centrifugal pump.
  • the housing 2 comprises a suction opening 3, through which is sucked and is conveyed by means of the centrifugal pump impeller 1 in the direction of an outflow opening 4 and then leaves the centrifugal pump.
  • the centrifugal pump impeller 1 is arranged on a shaft 5.
  • the shaft 5 is rotated by a motor, not shown in rotation.
  • the torque is transmitted via two feather keys 6 on the metallic hub part 8 and the driver elements 12 on the non-metallic impeller part 7 of the centrifugal pump impeller 1.
  • the centrifugal pump impeller 1 consists of a non-metallic Laufradteii 7 and a metallic hub part 8.
  • the non-metallic impeller part 7 is made of a ceramic-plastic composite material, in the Siliziumcarbid- particles! embedded in a polymer matrix.
  • the hub part 8 is made of a duplex stainless steel casting which has a ferritic-austenitic structure.
  • the non-metallic impeller part 7 is made in one piece and is produced by casting. It has a carrier plate 9, on which blades 10 are formed.
  • the exemplary embodiment is a radial centrifugal pump impeller.
  • Fig. 2 shows an exploded perspective view of the centrifugal pump impeller 1 with the end of the shaft 5.
  • the non-metallic impeller part 7 recesses 11.
  • the depressions 11 are bores which are introduced into the impeller part 7 after or even before complete curing or, if they were already precast during the production, are then finished.
  • Fig. 3 shows that in the assembled state in the wells 1 driver elements 12 engage.
  • Each Mitêteiement 12 consists of a sleeve 13 and a Vietnamesesseiement 14.
  • the sleeve 13 is a hollow cylindrical body which is closed at one end face.
  • Each sleeve 13 has an internal thread.
  • the connecting element 14 is designed as a screw having an external thread.
  • the sleeves 13 may be cast on the Weil-side end face of the impeller part 7.
  • Fig. 2 shows that the hubbub! 8 has a ring 15 which is provided along its circumference with a plurality of holes 16.
  • the sleeves 13 are inserted into the recesses 11.
  • a suitable adhesive or epoxy resin bridges tolerances and fixes.
  • the connecting elements 14 are inserted into the bores 16 and screwed into the sleeves 13, which are arranged in the recesses 11, and secured.
  • screws 20 can be screwed into further designated threaded sleeves or threaded holes 21 in the non-metallic material of the impeller part 7 and serve as a transport lock or mounting aid, for example, if the sleeves 13 are not pressed or glued into the recesses 11 are.
  • the pre-assembled centrifugal pump impeller is pushed onto the end of the shaft 5.
  • the shaft 5 is rotatably connected to the hub part 8, wherein the feather keys 6 engage in grooves 17 of the hub part 8.
  • the grooves 17 extend in the axial direction in the interior of the hub part 8.
  • a disc 23 is fastened by means of screws 24 on the end face of the shaft 5.
  • 23 holes 25 are introduced in the disc through which the
  • Screw 24 are inserted and then engage in holes provided with an internal thread on the front side of the shaft 5.
  • the screws 24 are cylindrical screws. By tightening the screws 24, the hub part 8 and the impeller part 7 are braced against each other.
  • the cap 26 is screwed into a central bore 27, which is provided with an internal thread.
  • the cap 26 has a pin 28 which is provided with an external thread.
  • Fig. 3 shows that between the disc 23 and the impeller part 7, an elastomeric ring 29 may be arranged. By tightening the screws 24 is against this
  • FIG. 3 it can be seen that between the cap 26 and the disc 23, an O-ring 30 is arranged. There is an O-ring 31 between the cap 26 and the impeller part 7. Likewise, an O-ring 32 is disposed between the ring 15 of the hub part 8 and the surface 9 of the impeller part 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

La présente invention concerne une roue à aubes (1) de pompe centrifuge, qui comporte une partie roue à aubes (7) non métallique et une partie moyeu (8) métallique reliée à la partie roue à aubes (7) et qui est montée sur un arbre (5). Selon l'invention, la partie roue à aubes (7) et la partie moyeu (8) sont reliées l'une à l'autre par une liaison libérable.
EP15813022.9A 2014-12-19 2015-12-15 Roue à aubes de pompe centrifuge Active EP3234371B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014226525.8A DE102014226525A1 (de) 2014-12-19 2014-12-19 Kreiselpumpenlaufrad
PCT/EP2015/079729 WO2016096808A1 (fr) 2014-12-19 2015-12-15 Roue à aubes de pompe centrifuge

Publications (2)

Publication Number Publication Date
EP3234371A1 true EP3234371A1 (fr) 2017-10-25
EP3234371B1 EP3234371B1 (fr) 2020-05-06

Family

ID=54884031

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15813022.9A Active EP3234371B1 (fr) 2014-12-19 2015-12-15 Roue à aubes de pompe centrifuge

Country Status (5)

Country Link
EP (1) EP3234371B1 (fr)
CN (2) CN107250551A (fr)
DE (1) DE102014226525A1 (fr)
WO (1) WO2016096808A1 (fr)
ZA (1) ZA201704112B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018214650A1 (de) * 2018-08-29 2020-03-05 KSB SE & Co. KGaA Strömungsführende Vorrichtung
CN109296562A (zh) * 2018-09-05 2019-02-01 嘉兴美斯克电气科技有限公司 一种浴霸风轮固定结构
DE102021118384A1 (de) 2021-07-15 2023-01-19 KSB SE & Co. KGaA Leichtbau-Hydraulikdesign für verbesserte 3D-Druckbarkeit
DE102021005121A1 (de) 2021-10-13 2023-04-13 KSB SE & Co. KGaA Laufrad mit Verzahnung in Deckscheibe

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD18758A (fr)
DE895250C (de) * 1944-01-08 1953-11-02 Porzellanfabrik Kahla Keramisches Laufrad fuer Kreiselpumpen u. dgl.
GB1386937A (en) 1972-04-17 1975-03-12 Mecanique Ind Int Impellers of pumps for cooling systems of internal combustion engines
DE7610913U1 (de) 1976-04-08 1976-08-19 Wilo-Werk Gmbh & Co -Pumpen- Und Apparatebau-, 4600 Dortmund Kreiselpumpe
DE4444965A1 (de) 1994-12-16 1996-06-20 Klein Schanzlin & Becker Ag Laufradbefestigung
JP2005291116A (ja) * 2004-03-31 2005-10-20 Yamada Seisakusho Co Ltd ウォーターポンプ用インペラ
CN200958487Y (zh) * 2006-09-01 2007-10-10 湖南天一科技股份有限公司 多级泵叶轮定位机构
WO2013000032A1 (fr) * 2011-06-30 2013-01-03 Weir Minerals (India) Private Limited Rotor en céramique perfectionné à moyeu métallique
CN203035597U (zh) * 2012-11-16 2013-07-03 苏州海涛化工钛设备有限公司 叶轮轮毂装置

Also Published As

Publication number Publication date
ZA201704112B (en) 2022-03-30
CN114738313A (zh) 2022-07-12
WO2016096808A1 (fr) 2016-06-23
DE102014226525A1 (de) 2016-06-23
EP3234371B1 (fr) 2020-05-06
CN107250551A (zh) 2017-10-13

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