EP0408569A1 - Welle. - Google Patents
Welle.Info
- Publication number
- EP0408569A1 EP0408569A1 EP89902254A EP89902254A EP0408569A1 EP 0408569 A1 EP0408569 A1 EP 0408569A1 EP 89902254 A EP89902254 A EP 89902254A EP 89902254 A EP89902254 A EP 89902254A EP 0408569 A1 EP0408569 A1 EP 0408569A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shaft
- bearing
- parts
- clamping device
- area
- 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
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
- F04D29/18—Rotors
- F04D29/20—Mounting rotors on shafts
Definitions
- the invention relates to a shaft for centrifugal pumps according to the preamble of the main claim.
- DE-AS 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 tapered surface, and a clamping device attached to the outer end of the shaft ensures that the individual parts arranged on the shaft are held 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 a 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.
- Sleeves pushed onto the shafts are used to hold the bearings and the gland seals.
- the bearings are held in their position by means of thread egg cut into or in the shaft ends as well as corresponding screw elements.
- the clamping mechanism for the shaft connection is located outside the bearings, at the outer shaft end.
- 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 according to one embodiment are arranged between the parts mounted on the shaft and the tensioning device, bring about a reliable contact of the individual parts under all operating conditions, which are also to be secured against rotation by the prestressing forces acting on them.
- 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 thereon, and that in the area of the shaft bearings
- Shaft ends with the same or smaller shaft diameters allow the use of drawn round material for shaft production. Time-consuming adjustment and fitting work and the associated controls can be omitted.
- Yet another embodiment of the invention provides that sealing rings arranged between a sleeve abutting the impeller and the impeller seal the shaft against the pumped medium. This reliably prevents access to the pumped medium between the impeller and shaft or between shaft protection sleeve and shaft or spacer sleeve and shaft. This reliably excludes possible corrosion of the fit, which in turn requires little manufacturing effort and disassembly.
- Embodiments of the invention are shown in the drawings and are described in more detail below. They show
- Fig. 1 shows a longitudinally divided double flow turbomachine with a roller-mounted pump shaft and the
- Fig. 2 shows a rotor of such a machine, the shaft of which is mounted in a roller bearing and a medium-hatched plain bearing.
- 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, shaft 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 likewise smaller diameter 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 to 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) which cooperate with the shaft protection sleeves (6) prevent the medium from getting between the shaft and the parts mounted on it.
- Fig. 2 shows 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 simultaneously 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 tightened by a tensioning device (10) and a nut
- 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)
Description
Claims
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 |
---|---|---|---|
DE3805899 | 1988-02-25 | ||
DE3805899A DE3805899A1 (de) | 1988-02-25 | 1988-02-25 | Welle |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0408569A1 true EP0408569A1 (de) | 1991-01-23 |
EP0408569B1 EP0408569B1 (de) | 1992-05-27 |
Family
ID=6348138
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89902254A Expired - Lifetime EP0408569B1 (de) | 1988-02-25 | 1989-02-10 | Welle |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0408569B1 (de) |
DE (2) | DE3805899A1 (de) |
WO (1) | WO1989008193A1 (de) |
Families Citing this family (2)
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 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4815164B1 (de) * | 1968-08-20 | 1973-05-12 | ||
US3861825A (en) * | 1970-12-21 | 1975-01-21 | Borg Warner | Multistage pump and manufacturing method |
CS179215B1 (en) * | 1975-10-07 | 1977-10-31 | Bronislav Begar | Centrifugal pump rotor,especially of multistage pump |
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 |
-
1988
- 1988-02-25 DE DE3805899A patent/DE3805899A1/de not_active Withdrawn
-
1989
- 1989-02-10 DE DE8989902254T patent/DE58901547D1/de not_active Expired - Lifetime
- 1989-02-10 EP EP89902254A patent/EP0408569B1/de not_active Expired - Lifetime
- 1989-02-10 WO PCT/EP1989/000123 patent/WO1989008193A1/de active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO8908193A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1989008193A1 (en) | 1989-09-08 |
EP0408569B1 (de) | 1992-05-27 |
DE3805899A1 (de) | 1989-09-07 |
DE58901547D1 (de) | 1992-07-02 |
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Legal Events
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