WO2000004623A1 - Bipolar synchronous motor with a horizontal rotor and method for controlling the amplitude of the sympathetic vibration of the double rotation frequencies in such a synchronous motor - Google Patents
Bipolar synchronous motor with a horizontal rotor and method for controlling the amplitude of the sympathetic vibration of the double rotation frequencies in such a synchronous motor Download PDFInfo
- Publication number
- WO2000004623A1 WO2000004623A1 PCT/DE1999/001852 DE9901852W WO0004623A1 WO 2000004623 A1 WO2000004623 A1 WO 2000004623A1 DE 9901852 W DE9901852 W DE 9901852W WO 0004623 A1 WO0004623 A1 WO 0004623A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rotor
- stator
- amplitudes
- rotor axis
- twice
- Prior art date
Links
Classifications
-
- 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
- H02K7/09—Structural association with bearings with magnetic bearings
-
- 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
Definitions
- the invention is in the field of dynamoelectric machines and is concerned with the suppression of such resonance vibrations of the horizontally arranged rotor of a two-pole synchronous machine, the frequency of which corresponds to twice the rotational frequency of the rotor.
- the cross-sectional anisotropy of the rotor leads together with the weight force to excite vibrations in the lateral, in particular vertical, direction, the frequencies of which correspond to twice the value of the respective rotational frequency of the rotor (DE-AS 1 262 686, column 1).
- the excited vibrations can have one or more resonance ranges. In particular in the case of machines which can be changed in speed, the resonance frequencies m generally lie in the operating speed range.
- the invention is based on the object of specifying measures with which the amplitudes of resonance vibrations at twice the rotational frequency of the rotor can be further reduced.
- the amplitudes of the resonance vibrations of twice the rotational frequency are set as a function of the vertical-eccentric orientation of the rotor axis in the stator bore.
- this setting it is expedient to proceed in such a way that - starting from an average setting of the vertical-eccentric orientation of the rotor in the stator bore - the amplitude of the double-rotational frequency resonance vibrations of the rotor is first measured in different operating states (idling, full load), that then, depending on the most unfavorable measured value (greatest vibration amplitude), the setting of the vertical-eccentric orientation of the rotor is changed by shifting the rotor axis against the stator axis, and that subsequently the steps "measurement of the amplitude of the double rotational frequency resonance vibrations" and "Displacement of the rotor axis" can be repeated until an optimum is reached and the optimal setting is then fixed.
- the measure of the vertical-eccentric alignment of the rotor axis is based on the Knows that in a synchronous machine of the type in question, in addition to the cross-sectional anisotropy of the rotor, there is a second excitation source for a radial force at twice the rotational frequency, which results from the interaction of a harmonic component of the rotor field generated by the rotor winding with one of the two basic eccentricity factors, i.e. due to a eccentric arrangement of the rotor in the stator bore resulting additional harmonic components of the magnetic air gap field results.
- This alternating force acting on the rotor at twice the rotational frequency acts in the opposite direction to the narrowest point of the air gap between the rotor and stator and always reaches its maximum when the extremes of the magnetic field pass the narrowest point.
- the amplitude of this alternating force is proportional to the air gap eccentricity.
- the amplitudes of the resonance vibrations at twice the rotational frequency can be adjusted by a vertical parallel displacement of the rotor axis and can be adjusted when a machine is in operation.
- the amplitudes of the resonance vibrations of twice the rotational frequency can optionally also be influenced by also inclining the rotor axis.
- the amplitudes of the resonance vibrations at twice the rotational frequency can also be adjusted by changing the excitation of the rotor.
- this measure only serves to fine-tune the amplitudes of the resonance vibrations in the sense of minimization.
- the setting of the vertically eccentric orientation of the rotor axis m of the stator bore can be carried out with the aid of different constructional means.
- this measure requires the rotor bearings to be displaced relative to the stator. If the rotor bearing and stator are fastened independently of one another on a base frame or on separate foundation plates, this can be done either by vertical displacement of the rotor bearing or else of the stator.
- the rotor axis can be shifted by raising or lowering the bearing feet of the rotor bearings using horizontally displaceable wedges.
- Another possibility is to use two rotatably adjustable eccentric disks for each rotor bearing, the outer of which is arranged in the end shield or on the base frame and the inner one accommodates the associated bearing housing.
- Such a displacement means also enables a horizontal displacement of the rotor axis.
- Another constructive means is to fix the bearing feet of the rotor bearings on a base frame or a base plate in such a way that the bearing feet can be raised by means of pressure screws, the final amount of the lifting being determined by inserting washers between the bearing feet and the base plate, and the Impression screws are then loosened.
- the stator can be lowered or raised in the same way.
- fastening screws can be used on the base plate or the base frame, which are designed as highly elastic expansion screws or equipped with a spring element below the screw head.
- FIGS. 1 to 6 Exemplary embodiments of the invention are shown in FIGS. 1 to 6.
- 1 shows a two-pole synchronous machine with a horizontal rotor in a schematic representation
- FIGS. 2 and 3 show a rotor bearing which can be adjusted vertically by means of wedge-shaped elements
- FIGS. 4 to 7 show two exemplary embodiments of the configuration of wedge-shaped elements
- FIG. 8 shows a rotor bearing which Impression screws can be raised
- Figure 9 shows a rotor bearing adjustable by means of eccentric disks in a perspective view.
- FIG. 1 shows a schematic representation of the basic structure of a two-pole electrical synchronous machine, which consists of a stator 1, which is arranged on a base frame 3, and a rotor 2, the rotor 2 with its axis 21 being arranged horizontally and a bore 6 of the stator 1 passes through.
- the ends of the shaft 8 of the rotor are supported in the two pillow blocks 4 and 5.
- the pillow block bearings are also arranged on the base frame 3.
- the rotor 2 is arranged in the bore 6 of the stator 1, which has an air gap 7 between the rotor and the stator.
- This theoretical alignment which essentially includes a vertical-eccentric arrangement of the rotor in the stator bore, is realized when the rotor is inserted into the stator by a corresponding assignment of the bearing axis of the two rotor bearings to the axis of the stator bore.
- the air gap dimensions are then measured, for example by means of a corresponding slide gauge, and the commercially available vibration sensors, for example inductively assigned to the rotor shaft, are used to record the double-rotational frequency vibrations of the rotor and then a change in one or more steps Adjustment of the air gap eccentricity made in the sense of an optimization.
- FIGS. 2 and 3 A first exemplary embodiment of this is shown in FIGS. 2 and 3.
- the plummer block 4 which consists essentially of the bearing block 41, the bearing shell 42 and the bearing base 43, is arranged on the base plate 3 by means of a support structure 44.
- the support structure 44 consists of two adjusting wedges 45 and 46 which can be displaced relative to one another by means of a clamping screw 47 shown as an axis.
- the bearing base 43 is also wedge-shaped on its underside, so that the wedge surfaces of the bearing base 43 and the adjusting wedges 45 and 47 lie one on top of the other. - By tightening the two adjusting wedges 45 and 47, the bearing 4 can be raised.
- the two adjustment lines 45 and 46 are assigned two further adjustment wedges 48 and 49, which can be adjusted transversely to the tensioning direction of the tensioning screw 47 by means of a tensioning screw 50.
- These adjusting wedges work with corresponding wedge surfaces on the inner ends of the two adjusting wedges 45 and 46, so that the adjusting wedges 48 and 49 can be used to press the two adjusting wedges 45 and 46 apart, which results in the plummer block 4 being lowered.
- Lateral guides 52 and fixing elements 51 are also assigned to the adjusting trowels 45 and 46.
- the bearing base 43 is fixed in the finally set state with fastening screws 53 which reach through the elongated holes in both the bearing base and the adjusting trowels 45 and 46.
- the support structure 44 can also be constructed in such a way that the adjusting wedges 45 and 46 with the clamping screw 47 are not arranged transversely but in the longitudinal direction to the axis of the rotor.
- Figures 4 and 5 show in a schematic representation that the adjusting wedges 45 and 46 have a flat wedge surface 54.
- the adjusting wedges 55 and 56 can also have a wedge-shaped wedge surface 58.
- the vertical parallel displacement of the rotor axis takes place by raising or lowering the associated pillow block bearings with the aid of screws 60 and 61, which penetrate the bearing foot 59.
- the screws 60 are impression screws with which the bearing foot can be raised, while the retaining screws 61 are designed as expansion screws (similar to DE 12 37 387 C).
- 3 washers 62 can be arranged between it and the base plate.
- Figure 8 shows in the right part of the illustration a retaining screw 63, which is equipped below the screw head with a spring element m in the form of disc springs 64.
- the rotor axis can also be shifted by means of two rotationally adjustable eccentric disks 65 and 66, of which the outer eccentric disk 66 is arranged in the end shield 67 or on the base frame and the inner eccentric disk 65 accommodates the bearing shell 68.
- the bearing shell 68 can not only be raised or lowered but also shifted laterally.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Motor Or Generator Frames (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000560649A JP2002520995A (en) | 1998-07-14 | 1999-06-22 | Two-pole synchronous machine with horizontal rotor and method of adjusting amplitude of double frequency resonant vibration in this synchronous machine |
EP99941386A EP1097501A1 (en) | 1998-07-14 | 1999-06-22 | Bipolar synchronous motor with a horizontal rotor and method for controlling the amplitude of the sympathetic vibration of the double rotation frequencies in such a synchronous motor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19832708.0 | 1998-07-14 | ||
DE1998132708 DE19832708C2 (en) | 1998-07-14 | 1998-07-14 | Two-pole electrical synchronous machine with a horizontal rotor and method for adjusting the amplitudes of resonance vibrations at twice the rotational frequency on such a synchronous machine |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000004623A1 true WO2000004623A1 (en) | 2000-01-27 |
Family
ID=7874768
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1999/001852 WO2000004623A1 (en) | 1998-07-14 | 1999-06-22 | Bipolar synchronous motor with a horizontal rotor and method for controlling the amplitude of the sympathetic vibration of the double rotation frequencies in such a synchronous motor |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1097501A1 (en) |
JP (1) | JP2002520995A (en) |
DE (1) | DE19832708C2 (en) |
WO (1) | WO2000004623A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5851880B2 (en) * | 2012-02-24 | 2016-02-03 | 三菱重工業株式会社 | Bearing device |
DE102014210600A1 (en) * | 2014-06-04 | 2015-12-17 | Siemens Aktiengesellschaft | Plummer block assembly and method for mounting a plummer block assembly |
JP7099361B2 (en) * | 2019-02-22 | 2022-07-12 | 株式会社明電舎 | Temporary fixing jig for rotary electric machine |
CN112072841A (en) * | 2020-09-03 | 2020-12-11 | 李楠楠 | Three-phase asynchronous vibration motor |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE360702C (en) * | 1922-10-06 | Kalman Von Kando | Storage for the runners of encapsulated electrical machines | |
DE850094C (en) * | 1951-04-10 | 1952-09-22 | Emanuel Wiegel | Adjustable guide bush |
DE1262686B (en) | 1964-07-21 | 1968-03-07 | Ass Elect Ind | Stabilizing support bearing for rotating shafts |
FR2109895A5 (en) * | 1970-10-01 | 1972-05-26 | Licentia Gmbh | |
DE2512009A1 (en) | 1974-04-30 | 1975-11-20 | Bbc Brown Boveri & Cie | PROCESS FOR CHANGING THE VIBRATION BEHAVIOR OF A SHAFT AND DEVICE FOR CARRYING OUT THE PROCESS |
DE2918763A1 (en) * | 1979-05-09 | 1981-01-22 | Kraftwerk Union Ag | BEARING ARRANGEMENT FOR RUNNERS OF ELECTRICAL MACHINES, ESPECIALLY FOR A RUNNER OF A TURBOG GENERATOR WITH SUPRAL-CONDUCTING FIELD DEVELOPMENT |
JPH02193547A (en) * | 1989-01-18 | 1990-07-31 | Akira Chiba | Electromagnetic rotary machine with radial position controller for rotary body utilizing rotary magnetic field of motor |
US5084643A (en) * | 1991-01-16 | 1992-01-28 | Mechanical Technology Incorporated | Virtual rotor balancing in magnetic bearings |
JPH0715926A (en) * | 1993-06-22 | 1995-01-17 | Hitachi Ltd | Aligning method of shaft center of rotating electric machine |
-
1998
- 1998-07-14 DE DE1998132708 patent/DE19832708C2/en not_active Expired - Fee Related
-
1999
- 1999-06-22 EP EP99941386A patent/EP1097501A1/en not_active Ceased
- 1999-06-22 WO PCT/DE1999/001852 patent/WO2000004623A1/en not_active Application Discontinuation
- 1999-06-22 JP JP2000560649A patent/JP2002520995A/en not_active Withdrawn
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE360702C (en) * | 1922-10-06 | Kalman Von Kando | Storage for the runners of encapsulated electrical machines | |
DE850094C (en) * | 1951-04-10 | 1952-09-22 | Emanuel Wiegel | Adjustable guide bush |
DE1262686B (en) | 1964-07-21 | 1968-03-07 | Ass Elect Ind | Stabilizing support bearing for rotating shafts |
FR2109895A5 (en) * | 1970-10-01 | 1972-05-26 | Licentia Gmbh | |
DE2512009A1 (en) | 1974-04-30 | 1975-11-20 | Bbc Brown Boveri & Cie | PROCESS FOR CHANGING THE VIBRATION BEHAVIOR OF A SHAFT AND DEVICE FOR CARRYING OUT THE PROCESS |
DE2918763A1 (en) * | 1979-05-09 | 1981-01-22 | Kraftwerk Union Ag | BEARING ARRANGEMENT FOR RUNNERS OF ELECTRICAL MACHINES, ESPECIALLY FOR A RUNNER OF A TURBOG GENERATOR WITH SUPRAL-CONDUCTING FIELD DEVELOPMENT |
JPH02193547A (en) * | 1989-01-18 | 1990-07-31 | Akira Chiba | Electromagnetic rotary machine with radial position controller for rotary body utilizing rotary magnetic field of motor |
US5084643A (en) * | 1991-01-16 | 1992-01-28 | Mechanical Technology Incorporated | Virtual rotor balancing in magnetic bearings |
JPH0715926A (en) * | 1993-06-22 | 1995-01-17 | Hitachi Ltd | Aligning method of shaft center of rotating electric machine |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 014, no. 471 (E - 0990) 15 October 1990 (1990-10-15) * |
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 04 31 May 1995 (1995-05-31) * |
Also Published As
Publication number | Publication date |
---|---|
JP2002520995A (en) | 2002-07-09 |
DE19832708A1 (en) | 2000-01-20 |
EP1097501A1 (en) | 2001-05-09 |
DE19832708C2 (en) | 2000-12-07 |
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