WO2002061923A1 - Lagerungseinrichtung für den rotor einer rotierenden maschine - Google Patents
Lagerungseinrichtung für den rotor einer rotierenden maschine Download PDFInfo
- Publication number
- WO2002061923A1 WO2002061923A1 PCT/IB2002/000358 IB0200358W WO02061923A1 WO 2002061923 A1 WO2002061923 A1 WO 2002061923A1 IB 0200358 W IB0200358 W IB 0200358W WO 02061923 A1 WO02061923 A1 WO 02061923A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bearing
- radial
- axial
- storage device
- rotor
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/06—Bearing arrangements
- F03B11/063—Arrangements for balancing axial thrust
- F03B11/066—Arrangements for balancing axial thrust in vertical axis machines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M1/00—Frames or casings of engines, machines or apparatus; Frames serving as machinery beds
- F16M1/04—Frames or casings of engines, machines or apparatus; Frames serving as machinery beds for rotary engines or similar machines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/083—Structural association with bearings radially supporting the rotary shaft at both ends of the rotor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Definitions
- the present invention relates to the field of rotating machines. It relates to a bearing device for the rotor of a rotating machine according to the preamble of claim 1.
- Such a storage device is e.g. known from the publication CH-A5-578 70S.
- the bearing bodies are the central body of a bearing star or support star or guide stem, which is formed by support arms extending from the bearing body in the radial direction. To support axial forces, the support arms are supported with their free outer ends in the axial direction either on the foundation, which is usually cast from concrete, which surrounds the generator concentrically, or on the stator of the generator. Examples of such support stars or guide stars are described in the aforementioned CH-A5-578 708 or the corresponding US-A-4,258,280 or CH-A5-583 469. An example of a combined axial and radial bearing or support and guide bearing can be found in FIG. 1 of EP-A1-0 586 861.
- the support arms in the prior art have been extended in a radial direction to the surrounding concrete wall and have been firmly screwed to the metal elements embedded therein.
- a high stiffness of the support star was achieved, which was essentially determined by the stiffness of the arms which are subjected to pressure in the longitudinal direction.
- a disadvantage of this arrangement is that when the arms of the supporting star expand thermally, very large compressive forces acting in the radial direction arise which, especially in the case of supporting stars arranged above the machine, cannot readily be absorbed by the rather thin concrete wall there.
- CH-A5-578 708 has taken a different approach to solving the problem associated with thermal expansion in the case of supporting stars or guide stars:
- connecting elements are used to intercept radial forces, which are arranged tangentially to an imaginary cylinder coaxial with the axis of rotation are and - with a pure radial or Guide bearings - form the arms of the bearing star (see Fig. 2 of CH-A5-578 708) or - for a combined axial and radial bearing - run between the ends of the (radial) support arms and the concrete wall (in Fig. 6 of CH -A5- 578 708).
- the tangentially oriented arrangement of the connecting elements or support arms ensures that thermal expansions are converted into uncritical rotations of the bearing body about the machine axis.
- the mode of operation of the tangentially oriented connecting elements or inclined spokes is described in detail in Brown Boveri Mitteilungen 2, Volume 67, pp. 108-116, February 1980.
- a disadvantage of the conventional supporting stars with tangentially oriented connecting elements is the direct link between the actual support arms, which absorb the axial forces and introduce them into the foundation, and the tangential connecting elements, which convert the radial forces into a twist and are responsible for centering the bearing body.
- This direct connection leads on the one hand to heavy and material-intensive constructions of the bearing star and on the other hand prevents a separate optimization of the construction elements responsible for the axial and radial forces.
- asymmetrical deformations such as those that can occur due to changes in the foundation or strong electromagnetic fields, cannot be easily compensated for.
- the object is achieved by the entirety of the features of claim 1.
- the essence of the invention is to completely decouple the absorption of the axial forces, such as weight and thrust forces, from the absorption of radial forces and the task of centering and radial guidance in the combined axial and radial bearing, by means of connecting elements which are oriented tangentially to accommodate radial forces and for centering are provided which are hinged at one end to the foundation and at the other end directly to the bearing body.
- the tangential orientation is understood to mean that the connecting elements are arranged at an angle to the radius in their articulation point in the circumferential direction, this angle of inclination being greater than 0 ° under all circumstances preferably greater than 30 °, and reaches 90 ° with full tangential orientation.
- this configuration can be viewed as a combination of two independent bearing stars. This makes it possible, in particular, to dispense with complex stretches between the support arms of the bearing star.
- the support structure can be simplified by the arrangement according to the invention and thus savings in material and weight can be achieved.
- the length of the tangentially oriented connecting elements is preferably adjustable, the connecting elements being infinitely variable in length, in particular in the manner of a turnbuckle, by combining a left-hand and a right-hand thread. This makes it possible to carry out a centering or a correction of the centering in a simple manner at any time and also to influence the operating behavior of the rotor and the entire machine advantageously by generating certain, evenly distributed, bias voltages.
- the decoupling of the axially and radially acting bearing stars and the flexible adaptation of the bearing device are further improved if the connecting elements are also designed as articulated struts which are pivotably articulated on the bearing body or on the foundation by means of bearing blocks.
- Such articulated struts and the associated bearing blocks are available as prefabricated parts in different dimensions and thus reduce the construction costs.
- FIG. 1 shows a schematic longitudinal section of the rotor of a vertically arranged hydrogen generator, which is mounted by means of a radial bearing and a combined axial and radial bearing, as is particularly suitable for the application of the invention;
- FIG. 2 shows a perspective view obliquely from above of a preferred exemplary embodiment of a bearing device according to the invention in the case of a hydrogenerator arranged in an annular foundation according to the configuration shown in FIG. 1;
- Fig. 3 in a perspective oblique view from below the storage device of Fig. 2 without the foundation.
- the rotor 11 rotates about a vertical axis 19. It has a shaft 12 which is rotatably supported by means of a (lower) radial bearing 16 and a (upper) combined axial and radial bearing 18.
- the combined axial and radial bearing 18 comprises a second radial bearing 15 and an axial bearing 14 arranged one above the other, on which the shaft 12 rests with a support ring 13.
- the radial bearings 15, 16 are provided for guiding and centering the rotor 11 with respect to the axis of rotation 19.
- the thrust bearing 14 absorbs the axial forces that result in particular from the weight of the rotor 11, the electromagnetic interaction between the rotor 11 and the stator concentrically surrounding it (not shown in FIG. 1) and the thrust caused by the action of the Water is generated on the turbine 17 attached to the lower end of the rotor 11.
- the combined axial and radial bearing 18 can, however, also exchange the position with the radial bearing 16 and be arranged accordingly below.
- the present invention now relates to the manner in which the axial and radial forces acting on the combined axial and radial bearing 18 are introduced directly or via the stator into the machine's foundation, which is usually made of concrete.
- 2 shows a preferred embodiment of a storage device according to the invention in a perspective view obliquely from above.
- the figure shows the (upper) combined axial and radial bearing 23 of a hydrogen generator 20, which is surrounded by a hollow cylindrical, annular foundation 21 made of concrete.
- a piece of the shaft 22 of the rotor extends through the combined axial and radial bearing 23, which is open at the top.
- the active rotor part is flanged to this piece of shaft 22 by means of a flange 32 (FIG.
- the combined axial and radial bearing 23 comprises a radial bearing 25 and an axial bearing arranged underneath (not visible in FIGS. 2 and 3). Both bearings are housed in a bearing body 24 which is bounded on the outside by an annular outer jacket.
- Six support arms 27 are attached to the bearing body 24 in the lower region of the axial bearing in a star shape and directed radially outward. Of course, these support arms do not have to be strictly radially oriented, as shown in the example.
- Each of the support arms 27 comprises a vertically standing, outwardly tapering metal plate 33 which is screwed to an associated rib 34.
- the ribs 34 are in turn partially welded under the bearing body 24.
- fastening elements 28 are arranged on the underside, with which the support arms 27 are fastened on the upper side of the stator.
- the fastening elements 28 are designed to be flexible in the radial direction. In the elements shown by way of example in FIGS. 2 and 3, this is achieved by two vertical, parallel and radially arranged sheet metal strips, which are connected to each other at the top and bottom by a horizontal plate.
- the fastening elements can of course also be buffers made of elastomers or other construction elements suitable for fulfilling the function.
- the support arms 27 together with the bearing body 24 form a bearing star 26 which introduces the axial forces which act on the axial bearing into the foundation 21 via a stator (not shown for the sake of clarity).
- the support arms are also designed in such a way that the axial bearing has only a low level of rigidity even in the circumferential direction.
- the exact positioning of the bearing body 24 or the shaft 22 with respect to the axis of rotation is taken over in the bearing device according to FIGS. 2 and 3, however, by (in the example six) length-adjustable articulated struts 29. In contrast to the designs that have been implemented to date, this has the advantage that the centering can also be adjusted in the fully assembled state.
- the hinge struts 29 are by means of bearing blocks 30, 31 with the inner end at the level of the radial bearing 25 on the outer surface of the bearing body 24 and with the outer end pivotally hinged to the inside of the foundation 21.
- the articulated struts 29 are oriented tangentially to an imaginary circle arranged concentrically to the shaft 22, so that an expansion of the bearing body 24 is converted into a rotation about the axis of rotation of the machine.
- the articulated struts 29 are designed to be length-adjustable by means of a combination of a right-hand and left-hand thread in the manner of a turnbuckle. This makes it possible, in a simple manner and at any time, not only to center or re-center the rotor or the shaft with respect to the axis of rotation, but also to build up symmetrical or asymmetrical preloads which affect the running properties of the rotor, in particular with regard to vibration frequencies, influence advantageous.
- the articulated struts 29 also have the advantage that they are available as commercially available components and are comparatively light and space-saving compared to complex welded structures. Suitable joint struts are offered, for example, by the German company Lisega GmbH, Zeven, under the type designation 39.
- the support arms are attached to the outside on flexible elements on the stator; the thermal expansion is recorded here so that the bearing body is not excessively stressed and deformed;
- the articulated struts are oriented tangentially at articulation points on the bearing body and on the foundation, so that the thermal expansion is easily converted into a rotary movement;
- the radial support arms have a low rigidity in the circumferential direction, such that the rotational movement of the bearing body is hampered as little as possible; - radial forces are conducted directly into the foundation via the articulated struts;
- the length of the joint struts is easily adjustable; this enables the shaft to be positioned exactly; a later necessary correction of the shaft position is also possible without any problems; and
- the adjustable hinge struts allow the setting of a predetermined bias of the storage device.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Sliding-Contact Bearings (AREA)
- Motor Or Generator Frames (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Support Of The Bearing (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR0206803-6A BR0206803A (pt) | 2001-02-02 | 2002-02-01 | Disposição de mancal para o rotor de uma máquina giratória |
CA002436577A CA2436577C (en) | 2001-02-02 | 2002-02-01 | Bearing device for the rotor of a rotating machine |
US10/470,558 US6942390B2 (en) | 2001-02-02 | 2002-02-01 | Bearing device for the rotor of a rotating machine |
EP02710227A EP1356573A1 (de) | 2001-02-02 | 2002-02-01 | Lagerungseinrichtung für den rotor einer rotierenden maschine |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10104696A DE10104696A1 (de) | 2001-02-02 | 2001-02-02 | Lagerunseinrichtung für den Rotor einer rotierenden Maschine |
DE10104696.0 | 2001-02-02 | ||
CH0500/01 | 2001-03-19 | ||
CH5002001A CH694978A5 (de) | 2001-03-19 | 2001-03-19 | Lagerungseinrichtung für den Rotor einer rotierenden Maschine. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002061923A1 true WO2002061923A1 (de) | 2002-08-08 |
Family
ID=25737477
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2002/000358 WO2002061923A1 (de) | 2001-02-02 | 2002-02-01 | Lagerungseinrichtung für den rotor einer rotierenden maschine |
Country Status (6)
Country | Link |
---|---|
US (1) | US6942390B2 (de) |
EP (1) | EP1356573A1 (de) |
CN (1) | CN1240173C (de) |
BR (1) | BR0206803A (de) |
CA (1) | CA2436577C (de) |
WO (1) | WO2002061923A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007142666A3 (en) * | 2005-09-30 | 2008-03-06 | Boeing Co | Hub joint for transferring load from a rotating shaft to a stationary body |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8316523B2 (en) | 2009-10-01 | 2012-11-27 | Pratt & Whitney Canada Corp. | Method for centering engine structures |
CN111986535A (zh) * | 2020-09-09 | 2020-11-24 | 国网湖南省电力有限公司 | 水轮机找中心用教学培训装置及其使用方法 |
SE2251385A1 (en) * | 2022-11-29 | 2024-05-30 | Heatex Ab | Adjustable rotor support and rotary heat exchanger with such support |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2282543A1 (fr) * | 1974-08-21 | 1976-03-19 | Siemens Ag | Groupe de machines, notamment hydrauliques, a axe vertical |
GB1484983A (en) * | 1974-11-19 | 1977-09-08 | Bbc Brown Boveri & Cie | Components of the supporting structure of electrical machines |
US4060744A (en) * | 1974-11-19 | 1977-11-29 | Bbc Brown Boveri & Company Limited | Rotary electrical machine or vertical construction |
US4258280A (en) | 1975-11-07 | 1981-03-24 | Bbc Brown Boveri & Company Limited | Supporting structure for slow speed large diameter electrical machines |
US4293786A (en) * | 1978-11-15 | 1981-10-06 | Bbc Brown, Boveri & Company, Limited | Carrying and guiding spider for the support of a rotor of a vertical electrical machine |
EP0586861A1 (de) | 1992-09-05 | 1994-03-16 | Asea Brown Boveri Ag | Kombiniertes Trag- und Führungslager einer vertikalachsigen Wasserkraftmaschine |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2149728A (en) * | 1933-06-27 | 1939-03-07 | Clifford B Cronan | Universal bearing support |
US2936999A (en) * | 1956-12-07 | 1960-05-17 | United Aircraft Corp | Tangential bearing supports |
DE1217490B (de) | 1964-02-01 | 1966-05-26 | Siemens Ag | Elektrische Maschine vertikaler Bauart mit Betonmantel |
DE2410437B2 (de) | 1974-03-01 | 1976-04-08 | Siemens AG, 1000 Berlin und 8000 München | Befestigung des tragsternes einer vertikalen elektrischen maschine, insbesondere eines wasserkraftgenerators |
US6386753B1 (en) * | 2000-12-29 | 2002-05-14 | Spx Corporation | Support assembly and method for supporting a steady bearing |
-
2002
- 2002-02-01 US US10/470,558 patent/US6942390B2/en not_active Expired - Fee Related
- 2002-02-01 BR BR0206803-6A patent/BR0206803A/pt not_active IP Right Cessation
- 2002-02-01 CA CA002436577A patent/CA2436577C/en not_active Expired - Fee Related
- 2002-02-01 WO PCT/IB2002/000358 patent/WO2002061923A1/de not_active Application Discontinuation
- 2002-02-01 CN CNB028043774A patent/CN1240173C/zh not_active Expired - Fee Related
- 2002-02-01 EP EP02710227A patent/EP1356573A1/de not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2282543A1 (fr) * | 1974-08-21 | 1976-03-19 | Siemens Ag | Groupe de machines, notamment hydrauliques, a axe vertical |
GB1484983A (en) * | 1974-11-19 | 1977-09-08 | Bbc Brown Boveri & Cie | Components of the supporting structure of electrical machines |
US4060744A (en) * | 1974-11-19 | 1977-11-29 | Bbc Brown Boveri & Company Limited | Rotary electrical machine or vertical construction |
US4258280A (en) | 1975-11-07 | 1981-03-24 | Bbc Brown Boveri & Company Limited | Supporting structure for slow speed large diameter electrical machines |
US4293786A (en) * | 1978-11-15 | 1981-10-06 | Bbc Brown, Boveri & Company, Limited | Carrying and guiding spider for the support of a rotor of a vertical electrical machine |
EP0586861A1 (de) | 1992-09-05 | 1994-03-16 | Asea Brown Boveri Ag | Kombiniertes Trag- und Führungslager einer vertikalachsigen Wasserkraftmaschine |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007142666A3 (en) * | 2005-09-30 | 2008-03-06 | Boeing Co | Hub joint for transferring load from a rotating shaft to a stationary body |
Also Published As
Publication number | Publication date |
---|---|
BR0206803A (pt) | 2004-02-03 |
US6942390B2 (en) | 2005-09-13 |
CN1489820A (zh) | 2004-04-14 |
CA2436577A1 (en) | 2002-08-08 |
CN1240173C (zh) | 2006-02-01 |
EP1356573A1 (de) | 2003-10-29 |
CA2436577C (en) | 2009-10-06 |
US20040101221A1 (en) | 2004-05-27 |
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