EP0408569B1 - Arbre - Google Patents

Arbre Download PDF

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Publication number
EP0408569B1
EP0408569B1 EP89902254A EP89902254A EP0408569B1 EP 0408569 B1 EP0408569 B1 EP 0408569B1 EP 89902254 A EP89902254 A EP 89902254A EP 89902254 A EP89902254 A EP 89902254A EP 0408569 B1 EP0408569 B1 EP 0408569B1
Authority
EP
European Patent Office
Prior art keywords
shaft
bearing
parts
adjacent
sleeves
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
EP89902254A
Other languages
German (de)
English (en)
Other versions
EP0408569A1 (fr
Inventor
Horst SCHÄFER
Günter Beiss
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 AG
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
Priority to AT89902254T priority Critical patent/ATE76675T1/de
Publication of EP0408569A1 publication Critical patent/EP0408569A1/fr
Application granted granted Critical
Publication of EP0408569B1 publication Critical patent/EP0408569B1/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
    • F04D29/18—Rotors
    • F04D29/20—Mounting rotors on shafts

Definitions

  • the invention relates to the shaft of a centrifugal pump according to the preamble of claim 1.
  • DE-B-10 44 621 shows a shaft that has its maximum thickness in the area of the drive and tapers continuously up to the opposite shaft end.
  • a collar is provided in the area of the drive against which the inner ring of a roller bearing rests.
  • the impeller is positioned on the shaft with the help of spacer rings as well as shaft protection sleeves and a conical surface, and a tensioning device attached to the outer end of the shaft keeps the individual parts arranged on the shaft together. This requires a great deal of effort during production, since the machining of the shaft provides for a large number of fits.
  • the assembly also requires precise adjustment of the individual parts.
  • the shaft is formed in two parts, the coupling of the two shaft parts being carried out by means of spur gearing.
  • the one shaft part is provided with a clamping bolt, over which the other shaft part is pushed and the two shaft parts are clamped together by a screw connection.
  • the impellers are pushed onto shoulders of the shaft and are held in place by circlips. Necks pushed onto the shaft ends serve to accommodate the bearings and the gland seals.
  • the bearings are held in their position by means of threads cut on or in the shaft ends and appropriately attached screw elements.
  • the clamping mechanism for the shaft connection is located outside the bearings, at the outer shaft end.
  • the DD-A-126 125 shows a shaft corresponding to the generic term.
  • separate clamping devices are provided on the shaft ends. Under the influence of heat or overloading, permanent deformations can occur inside the shaft, which can lead to the shaft breaking or the connection becoming loose.
  • the invention has for its object to develop a rotor for a turbomachine, the parts can be easily manufactured and assembled and disassembled in a low cost. This object is achieved in accordance with the characterizing part of the main claim.
  • the spring elements which are arranged between the parts mounted on the shaft and the clamping device, bring about a reliable contact of the individual parts under all operating conditions.
  • the pre-tensioning forces also protect against rotation.
  • the spring elements can be designed as disc springs, ring springs or the like. This enables a space-saving design with high security against unintentional loosening.
  • the shaft has a constant diameter in the area of the shaft protection sleeves, spacer sleeves and impellers mounted on it.
  • Shaft ends In the area of the shaft bearings Shaft ends have the same or smaller shaft diameters. This enables the use of drawn round material for shaft production. Time-consuming adjustment and fitting work and the associated controls can be omitted.
  • a turbomachine (1) here a centrifugal pump with a single-stage design.
  • a roller bearing (3) is secured to the tapered force-introducing shaft end (2) by means of retaining rings (4).
  • Spacers (5), shaft protection sleeves (6) and impeller (7) are supported on the inner ring of the roller bearing (3).
  • a roller bearing (9) mounted on the output shaft end (8) on a diameter that is also smaller here is pressed by a clamping device (10) designed as a nut against the spacer sleeve (5) and ultimately against the fixed bearing (3).
  • a disc spring (11) is arranged, by means of which a reliable pressing and positioning of the parts on the shaft is ensured.
  • the bearing housing construction flanged onto the pump housing enables the respective bearing to be dismantled in the simplest manner at its shaft end in the event of bearing damage.
  • Sealing rings (12) cooperating with the shaft protection sleeves (6) prevent the medium from getting between the shaft and the parts mounted on it.
  • Fig. 2 shows in an enlarged view and without a surrounding housing the so-called rotor, a fully assembled shaft with impeller, seals and bearings.
  • a fixed roller bearing (3) is attached by means of a circlip (4) on the smaller shaft journal. It forms the fixed bearing in this embodiment and in contrast to FIG. 1.
  • a shaft protection sleeve which is also designed as a liner (13) and interacts with a corresponding slide bearing (14).
  • ceramics are suitable as suitable bearing materials.
  • the parts arranged on the shaft (15) are pressed together by a clamping device (10) designed as a nut, as well as disc springs (11).
  • a second nut (12) serves as a lock nut if no self-locking nuts are used.

Landscapes

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

Abstract

Un arbre (15) dont les extrémités (2, 8) ont un diamètre égal ou inférieur à celui du tronçon de l'arbre est utilisé dans une turbo-machine pourvue de rotors (7), de douilles de protection (6) de l'arbre, de douilles d'écartement (5), etc. Un palier (3) disposé du côté d'attaque (2) de l'arbre supporte les organes (5, 6, 7) disposés sur le tronçon d'arbre (15) à diamètre constant. Un dispositif de précontrainte (10) monté sur l'extrémité libre (8) de l'arbre serre, par le moyen de ressorts (11), les organes (5, 6, 7) montés sur l'arbre contre le palier (3), qui peut être un palier libre ou un palier fixe.

Claims (2)

1. Arbre d'une turbo machine avec une ou plusieurs roues montées sur celui-ci et positionnées à l'aide de douilles de protection et/ou de douilles d'écartement ainsi qu'à l'aide de paliers, arbre dans lequel les pièces ordonnées sur l'arbre sont pressées contre un palier situé dans la zone de l'extrêmité de l'arbre qui introduit les forces grâce à un dispositif de serrage placé à l'extrêmité libre de l'arbre, lequel présente, dans la zone des douilles de protection de l'arbre, des douilles d'écartement ainsi que de celle des roues, un diamètre constant et, dans la zone des extrêmités de l'arbre qui supportent les paliers de l'arbre, ainsi que dans la zone de l'extrêmité de l'arbre qui introduit les forces, des diamètres d'arbre semblables ou plus petits, en particulier pour turbo machines à plusieurs flux, caractérisé en ce que le Dispositif de serrage (10) presse des pièces (5, 6, 7) bloquées en rotation sur l'arbre contre un palier (3) placé dans la zone (2) de l'arbre d'introduction des forces ou contre un élément du dispositif, les éléments (11) de ressort sur l'extrêmité de sortie de l'arbre (8) sont placés entre le dispositif de serrage (10) et des pièces placées sur l'arbre.
2. Arbre selon la revendication 1 caractérisé en ce que des bagues d'étanchéité (12) placées entre une douille (5, 6) collant à la roue et la roue (7) rendent l'arbre étanche au fluide.
EP89902254A 1988-02-25 1989-02-10 Arbre Expired - Lifetime EP0408569B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89902254T ATE76675T1 (de) 1988-02-25 1989-02-10 Welle.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3805899A DE3805899A1 (de) 1988-02-25 1988-02-25 Welle
DE3805899 1988-02-25

Publications (2)

Publication Number Publication Date
EP0408569A1 EP0408569A1 (fr) 1991-01-23
EP0408569B1 true EP0408569B1 (fr) 1992-05-27

Family

ID=6348138

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89902254A Expired - Lifetime EP0408569B1 (fr) 1988-02-25 1989-02-10 Arbre

Country Status (3)

Country Link
EP (1) EP0408569B1 (fr)
DE (2) DE3805899A1 (fr)
WO (1) WO1989008193A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010041208B4 (de) * 2010-09-22 2013-05-08 Siemens Aktiengesellschaft Anordnung mit einer Dichtung, Dichtung und Turboverdichter
CN110043504B (zh) * 2019-05-23 2024-03-01 湖南机电职业技术学院 泵轴套

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD126125A1 (fr) * 1975-10-07 1977-06-22

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4815164B1 (fr) * 1968-08-20 1973-05-12
US3861825A (en) * 1970-12-21 1975-01-21 Borg Warner Multistage pump and manufacturing method
DE7923037U1 (de) * 1979-08-11 1981-02-12 Robert Bosch Gmbh, 7000 Stuttgart Luefter mit einem aus einem gehaeuse eines antriebsaggregates ragenden, mit einem luefterrad versehenen, in dem gehaeuse gelagerten wellenstumpf
DE8619811U1 (de) * 1986-07-23 1986-09-18 Wilhelm Düchting KG Pumpen- und Maschinenfabrik, 5810 Witten Kreiselpumpe mit Radialspalteinstellung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD126125A1 (fr) * 1975-10-07 1977-06-22

Also Published As

Publication number Publication date
EP0408569A1 (fr) 1991-01-23
DE3805899A1 (de) 1989-09-07
WO1989008193A1 (fr) 1989-09-08
DE58901547D1 (de) 1992-07-02

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