WO2000039554A1 - Verfahren zum auswuchten eines rotors - Google Patents
Verfahren zum auswuchten eines rotors Download PDFInfo
- Publication number
- WO2000039554A1 WO2000039554A1 PCT/EP1999/008217 EP9908217W WO0039554A1 WO 2000039554 A1 WO2000039554 A1 WO 2000039554A1 EP 9908217 W EP9908217 W EP 9908217W WO 0039554 A1 WO0039554 A1 WO 0039554A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- balancing
- rotor
- plane
- test
- carried out
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000012360 testing method Methods 0.000 claims abstract description 27
- 238000005457 optimization Methods 0.000 claims description 11
- 238000004364 calculation method Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 7
- 230000010355 oscillation Effects 0.000 abstract description 4
- 230000003466 anti-cipated effect Effects 0.000 abstract 1
- 238000011156 evaluation Methods 0.000 description 12
- 238000012937 correction Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/14—Determining imbalance
- G01M1/16—Determining imbalance by oscillating or rotating the body to be tested
- G01M1/20—Determining imbalance by oscillating or rotating the body to be tested and applying external forces compensating forces due to imbalance
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/16—Centering rotors within the stator; Balancing rotors
- H02K15/165—Balancing the rotor
Definitions
- mass asymmetries with respect to the axis of rotation of a rotor Due to the centrifugal force during rotation, mass asymmetries with respect to the axis of rotation of a rotor produce a periodic force on the bearing of the rotor.
- the causes of mass asymmetries can be, for example, design errors, material errors, manufacturing and assembly errors or operational errors. This leads to a vibration load on the machine and its components, e.g. B. the storage and thus wear and damage.
- the task of balancing is to minimize these unfavorable effects, to increase the efficiency of the machine and to increase the safety when operating the machine.
- the mass asymmetry is determined during balancing and compensated for by counterweights. The balancing takes place on balancing machines. If the balanced rotor is installed in the machine, changes in the balancing condition can result. Likewise, the operating time of the machine, e.g. B. deterioration due to corrosion, erosion and caking.
- Balancing the rotor in its final storage (in situ) depending on the deteriorating balance condition during operation and ensuring a specified running condition is the task of the operation balancing.
- the imbalance of a rotor cannot be determined directly during operational balancing.
- the absolute bearing vibrations occurring at the bearing points or the relative shaft vibrations are recorded by means of sensors.
- the circulating frequency vibrations are determined and displayed according to magnitude and phase angle.
- a reference encoder creates a speed and angle reference to the rotor.
- single-plane balancing is carried out for a narrow, disc-shaped rotor (mass correction in a radial plane of the rotor), or two-plane or multi-plane balancing is carried out for an elongated, roller-shaped rotor (mass corrections in at least two radial planes).
- influence coefficient method is used as the calculation method, which is described in the article "A least Squares method for Computing balance corrections" Goodman, TP, Trans. ASME, Ser. 3, vol. 36, no. 3, August 1964, on page
- test runs since the vibration transmission properties of the mounting and foundation are generally not known.
- the number of test runs is at least equal to the number of levels in which balancing is to take place. These test runs represent a considerable effort.
- the method according to the invention described above avoids unnecessary test runs and thus improves the accuracy of the unbalance compensation. Only the necessary test runs are carried out so that the effort and the time required and thus the downtime of the machine during operational balancing is reduced.
- the rotor 1 to be balanced is rotatably mounted about the axis of rotation 3 in two housings in a housing 2.
- the housing 2 is supported on a foundation 4-.
- the two bearing points are each assigned a measuring sensor 5, 5 ', which record the absolute bearing vibrations occurring at the bearing points.
- the relative shaft vibrations could also be measured.
- the measured vibration signals of the rotor 1 are fed to an evaluation unit 6.
- a reference transmitter for.
- a photoelectric scanning head 7 is arranged at a distance from a shaft end 8 of the rotor 1 which projects from the housing and which scans a reference mark 9 which rotates with the shaft end 8.
- the reference signals determined by the reference transmitter 7 are also fed to the evaluation unit 6.
- the reference signals establish the angle and speed reference between the rotor 1 to be balanced and the evaluation unit 6.
- an initial unbalance measurement is carried out in a first step, i. H. the rotor rotates at the operating speed and the vibration signals at the two bearing points are measured and transmitted to the evaluation unit 6. Furthermore, a reference signal is sampled by the reference transmitter 7 and transmitted to the evaluation unit 6.
- the measured vibration signals are first amplified and then filtered.
- the filter circuit eliminates the spurious vibrations so that the unbalance components of the bearing vibrations are obtained as a result. From the unbalance components of the bearing vibrations, the vibration amplitude and the phase angle of the unbalance vibrations can be taken into account
- Reference signals are determined. These data are stored as primary unbalance data in the evaluation unit 6.
- a balancing level is now defined.
- balancing operations it is often unclear whether balancing must be carried out on one or two or more levels.
- a test mass is attached to the balancing plane.
- the data of the test run ie size, mounting bracket and possibly The fastening radius of the test mass is transmitted to the evaluation unit.
- a test run is carried out. H. the rotor with the test mass rotates and the vibration signals at the two bearing points are measured and fed to the evaluation unit. Furthermore, the reference signals sampled by the reference transmitter 7 are transmitted to the evaluation unit 6. The measured vibration signals and the reference signals are processed and evaluated in accordance with the explanations for the original unbalance measurement, so that the vibration amplitudes resulting from the unbalance components of the bearing vibration as well as the phase angle of the unbalance vibration can be displayed and stored as test run data.
- the initial unbalance data and the test data for calculating the influence coefficients are first displayed in a first iteration.
- the method of calculating the influence coefficients is also explained in detail in the above-mentioned article.
- the original unbalance measurement data and the influence coefficients are then used to calculate the size and the angular position of a balancing mass in the predetermined balancing plane and the remaining vibrations.
- the weighted least squares method there is another iteration using the weighted least squares method. This method optimally minimizes the remaining vibrations i. S. d. Balancing, since large residual vibrations have a greater influence on the underlying mathematical algorithm, ie weighting takes place according to the amount of the residual vibrations.
- the result of the further iteration based on the weighted least squares method can be optimized by further iteration steps using the least squares method.
- This result is then compared to an optimization condition.
- This optimization condition can consist of one or more criteria that are defined in advance. Some possible criteria that can be selected are listed below as examples:
- the existing balancing problem can be viewed as a single level problem and an unbalance compensation can be carried out using the calculated optimal balancing mass. If the optimization condition cannot be met, a second test run must be carried out. After the further test run, the compensation weights are calculated. If a subsequent test run shows that the required balancing quality has not been achieved, the procedure described above must be expanded to more than two levels.
- the individual residual vibrations to be optimized can be provided with weight factors which enable an individual evaluation of the individual vibration quantities. So that the method z. B. adapt to the use of different transducers to the different effects of the vibration on the system to be balanced.
- the method is advantageously integrated in portable measuring devices.
- the measuring device connects the measuring device, measurement of the orbital frequency oscillation according to amount and phase with the energy supply of the measuring transducers and the evaluation device. This is advantageous because the operational balancing usually has to take place on the machine.
- the method could also be implemented on a computer which is connected to the measured value acquisition via remote data transmission.
- the data acquisition could supply monitoring system Being r z .. B-. is connected to the evaluation unit via a coupling via telephone or Internet.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Testing Of Balance (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99953955A EP1147392A1 (de) | 1998-12-23 | 1999-10-29 | Verfahren zum auswuchten eines rotors |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19859664.2 | 1998-12-23 | ||
DE1998159664 DE19859664A1 (de) | 1998-12-23 | 1998-12-23 | Verfahren und Vorrichtung zum Auswuchten eines Rotors |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000039554A1 true WO2000039554A1 (de) | 2000-07-06 |
Family
ID=7892387
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1999/008217 WO2000039554A1 (de) | 1998-12-23 | 1999-10-29 | Verfahren zum auswuchten eines rotors |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1147392A1 (de) |
DE (1) | DE19859664A1 (de) |
WO (1) | WO2000039554A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10032600B4 (de) * | 2000-07-07 | 2014-02-13 | Brüel & Kjaer Vibro GmbH | Verfahren und Vorrichtung zum Auswuchten eines Rotors |
GB0317344D0 (en) * | 2003-07-24 | 2003-08-27 | Newage Int Ltd | A method of balancing a rotor and a balacing machine |
DE102004044070B3 (de) * | 2004-09-11 | 2006-01-19 | Pierburg Gmbh | Unwuchtausgleichselement, Pumpe und Verfahren zum Auswuchten einer Pumpe |
CN102107691A (zh) * | 2011-02-24 | 2011-06-29 | 奇瑞汽车股份有限公司 | 一种汽车悬架应力释放设备 |
CN102539072B (zh) * | 2012-01-18 | 2014-12-10 | 山东电力研究院 | 一种电厂锅炉侧风机现场动平衡测量装置及动平衡方法 |
GB2580344B (en) * | 2019-01-02 | 2023-06-14 | Universal Balancing Ltd | Method of balancing a rotor |
DE102019123277B4 (de) * | 2019-08-30 | 2023-01-19 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Verfahren zum Auswuchten von Läufern elektrischer Maschinen |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4098127A (en) * | 1976-04-12 | 1978-07-04 | Hitachi, Ltd. | Balancing method for use in multiple-span rotor shaft system and balancing system using same |
DE2756829A1 (de) * | 1977-12-20 | 1979-06-21 | Hofmann Gmbh & Co Kg Maschinen | Schaltungsanordnung zur ermittlung der ausgleichsgewichtsgroessen und -phasenlagen fuer rotierende maschinenteile, insbesondere bei der betriebsauswuchtung |
US4626147A (en) * | 1984-10-03 | 1986-12-02 | Whirlpool Corporation | Method of and apparatus for balancing a rotary body |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4227014A1 (de) * | 1992-08-14 | 1994-02-17 | Budig Peter Klaus Prof Dr Sc T | Verfahren und Anordnung zum Auswuchten eines Rotors |
DE19501959C2 (de) * | 1995-01-24 | 1998-07-02 | Bosch Gmbh Robert | Verfahren zum Auswuchten einer elektrisch angetriebenen Luftgebläseeinheit |
DE19700258C2 (de) * | 1997-01-07 | 1999-04-08 | Deutsche Bahn Ag | Verfahren zum Auswuchten von Dieselgeneratoren für Lokomotiven mit einseitiger Lagerung des Generators, bei dem eine Resonanz im Bereich der Betriebsdrehzahlen auftritt |
-
1998
- 1998-12-23 DE DE1998159664 patent/DE19859664A1/de not_active Withdrawn
-
1999
- 1999-10-29 WO PCT/EP1999/008217 patent/WO2000039554A1/de not_active Application Discontinuation
- 1999-10-29 EP EP99953955A patent/EP1147392A1/de not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4098127A (en) * | 1976-04-12 | 1978-07-04 | Hitachi, Ltd. | Balancing method for use in multiple-span rotor shaft system and balancing system using same |
DE2756829A1 (de) * | 1977-12-20 | 1979-06-21 | Hofmann Gmbh & Co Kg Maschinen | Schaltungsanordnung zur ermittlung der ausgleichsgewichtsgroessen und -phasenlagen fuer rotierende maschinenteile, insbesondere bei der betriebsauswuchtung |
US4626147A (en) * | 1984-10-03 | 1986-12-02 | Whirlpool Corporation | Method of and apparatus for balancing a rotary body |
Also Published As
Publication number | Publication date |
---|---|
DE19859664A1 (de) | 2000-06-29 |
EP1147392A1 (de) | 2001-10-24 |
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