Simulated identification on dynamic characteristics of large heavy-load bearing
It’s difficult to test repeatedly for large heavy-load bearings (LHLBs) with full-scale and real load due to complexity and costliness, so simulated identification on dynamic characteristics of 1750 MW nuclear generator bearing with diameter 800 mm and specific pressure 3.3 MPa is provided in this p...
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doaj-f149b854c14841019d9914c9d20fa3d02020-11-24T23:56:39ZengJVE InternationalJournal of Vibroengineering1392-87162538-84602017-08-011953230324210.21595/jve.2017.1825918259Simulated identification on dynamic characteristics of large heavy-load bearingWu Ouyang0Lin Peng1Runlin Chen2Xiaoyang Yuan3Reliability Engineering Institute, Key Laboratory of Marine Power Engineering and Technology (Ministry of Transport), School of Energy and Power Engineering, Wuhan University of Technology, Wuhan, ChinaDongfang Turbine Co., Ltd., Deyang, ChinaSchool of Mechanical and Precision Instrument Engineering, Xi’an University of Technology, Xi’an, ChinaKey Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, Xi’an Jiaotong University, Xi’an, ChinaIt’s difficult to test repeatedly for large heavy-load bearings (LHLBs) with full-scale and real load due to complexity and costliness, so simulated identification on dynamic characteristics of 1750 MW nuclear generator bearing with diameter 800 mm and specific pressure 3.3 MPa is provided in this paper. The identification model of bearing dynamic characteristic is established, the calculating method of positive and negative dynamic problems is provided, and effects of signal disturbances on identification precision are analyzed. The results show that the LHLBs’ permitted displacement disturbance should not be over 5 μm and the permitted ratio of dynamic load and static load is about 1 %-2 %, which is different from common knowledge of 15 %-20 % for small light-load bearings. If identification error of the main stiffness and main damping coefficients is less than 5 %, the amplitude of periodical disturbance of the dynamic load and displacement signals should be less than 5 %. If identification error of the main damping coefficients is less than 10 %, the phase of these two signals should be less than 1°. The roundness error and rotation error of the large shaft should be eliminated.https://www.jvejournals.com/article/18259large heavy-load bearingdynamic characteristic coefficientssimulated identificationidentification precisionsignal disturbance |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Wu Ouyang Lin Peng Runlin Chen Xiaoyang Yuan |
spellingShingle |
Wu Ouyang Lin Peng Runlin Chen Xiaoyang Yuan Simulated identification on dynamic characteristics of large heavy-load bearing Journal of Vibroengineering large heavy-load bearing dynamic characteristic coefficients simulated identification identification precision signal disturbance |
author_facet |
Wu Ouyang Lin Peng Runlin Chen Xiaoyang Yuan |
author_sort |
Wu Ouyang |
title |
Simulated identification on dynamic characteristics of large heavy-load bearing |
title_short |
Simulated identification on dynamic characteristics of large heavy-load bearing |
title_full |
Simulated identification on dynamic characteristics of large heavy-load bearing |
title_fullStr |
Simulated identification on dynamic characteristics of large heavy-load bearing |
title_full_unstemmed |
Simulated identification on dynamic characteristics of large heavy-load bearing |
title_sort |
simulated identification on dynamic characteristics of large heavy-load bearing |
publisher |
JVE International |
series |
Journal of Vibroengineering |
issn |
1392-8716 2538-8460 |
publishDate |
2017-08-01 |
description |
It’s difficult to test repeatedly for large heavy-load bearings (LHLBs) with full-scale and real load due to complexity and costliness, so simulated identification on dynamic characteristics of 1750 MW nuclear generator bearing with diameter 800 mm and specific pressure 3.3 MPa is provided in this paper. The identification model of bearing dynamic characteristic is established, the calculating method of positive and negative dynamic problems is provided, and effects of signal disturbances on identification precision are analyzed. The results show that the LHLBs’ permitted displacement disturbance should not be over 5 μm and the permitted ratio of dynamic load and static load is about 1 %-2 %, which is different from common knowledge of 15 %-20 % for small light-load bearings. If identification error of the main stiffness and main damping coefficients is less than 5 %, the amplitude of periodical disturbance of the dynamic load and displacement signals should be less than 5 %. If identification error of the main damping coefficients is less than 10 %, the phase of these two signals should be less than 1°. The roundness error and rotation error of the large shaft should be eliminated. |
topic |
large heavy-load bearing dynamic characteristic coefficients simulated identification identification precision signal disturbance |
url |
https://www.jvejournals.com/article/18259 |
work_keys_str_mv |
AT wuouyang simulatedidentificationondynamiccharacteristicsoflargeheavyloadbearing AT linpeng simulatedidentificationondynamiccharacteristicsoflargeheavyloadbearing AT runlinchen simulatedidentificationondynamiccharacteristicsoflargeheavyloadbearing AT xiaoyangyuan simulatedidentificationondynamiccharacteristicsoflargeheavyloadbearing |
_version_ |
1725457286362562560 |