Numerical Simulation of Nonlinear Oil Film Forces of Tilting-Pad Guide Bearing in Large Hydro-unit
A new numerical method is proposed for predicting the nonlinearity of tilting-pad guide bearing oilfilm force in the rotor-bearing system in a large hydro-unit. Nonlinear displacement and velocity of the journal center, as well as nonlinear tilting angles and angular velocities of the pads in non-st...
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| Format: | Article |
| Language: | English |
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Wiley
2000-01-01
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| Series: | International Journal of Rotating Machinery |
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| Online Access: | http://dx.doi.org/10.1155/S1023621X00000324 |
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| author | Li-Feng Ma Xin-Zhi Zhang |
| author_facet | Li-Feng Ma Xin-Zhi Zhang |
| author_sort | Li-Feng Ma |
| collection | DOAJ |
| description | A new numerical method is proposed for predicting the nonlinearity of tilting-pad guide bearing oilfilm force in the rotor-bearing system in a large hydro-unit. Nonlinear displacement and velocity of the journal center, as well as nonlinear tilting angles and angular velocities of the pads in non-stationary Reynolds equation are taken into account. This method is also suited for other small rotor-bearing system. As an example, the response due to a momentarily created unbalance is Calculated. The nonlinear motion patterns of the pad and journal whirling orbit are obtained. Finally, the nonlinear orbit is compared to the linear one that could be calculated from linear stiffness and damping coefficients. It is shown that there are important differences between those two orbits and that the nonlinear simulation is more accurate. |
| format | Article |
| id | doaj-art-03ebe186a1ca4cf6becfa89835779197 |
| institution | Kabale University |
| issn | 1023-621X |
| language | English |
| publishDate | 2000-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Rotating Machinery |
| spelling | doaj-art-03ebe186a1ca4cf6becfa898357791972025-02-03T01:26:20ZengWileyInternational Journal of Rotating Machinery1023-621X2000-01-016534535310.1155/S1023621X00000324Numerical Simulation of Nonlinear Oil Film Forces of Tilting-Pad Guide Bearing in Large Hydro-unitLi-Feng Ma0Xin-Zhi Zhang1School of Civil Engineering and Mechanics, Xi'an Jiaotong University, 710049, ChinaZhengzhou Research Institute of Mechanics Engineering, 450052, ChinaA new numerical method is proposed for predicting the nonlinearity of tilting-pad guide bearing oilfilm force in the rotor-bearing system in a large hydro-unit. Nonlinear displacement and velocity of the journal center, as well as nonlinear tilting angles and angular velocities of the pads in non-stationary Reynolds equation are taken into account. This method is also suited for other small rotor-bearing system. As an example, the response due to a momentarily created unbalance is Calculated. The nonlinear motion patterns of the pad and journal whirling orbit are obtained. Finally, the nonlinear orbit is compared to the linear one that could be calculated from linear stiffness and damping coefficients. It is shown that there are important differences between those two orbits and that the nonlinear simulation is more accurate.http://dx.doi.org/10.1155/S1023621X00000324Tilting-pad guide bearingNonlinear oil film forceHydro-unitComputer numerical simulation. |
| spellingShingle | Li-Feng Ma Xin-Zhi Zhang Numerical Simulation of Nonlinear Oil Film Forces of Tilting-Pad Guide Bearing in Large Hydro-unit International Journal of Rotating Machinery Tilting-pad guide bearing Nonlinear oil film force Hydro-unit Computer numerical simulation. |
| title | Numerical Simulation of Nonlinear Oil Film Forces of
Tilting-Pad Guide Bearing in Large Hydro-unit |
| title_full | Numerical Simulation of Nonlinear Oil Film Forces of
Tilting-Pad Guide Bearing in Large Hydro-unit |
| title_fullStr | Numerical Simulation of Nonlinear Oil Film Forces of
Tilting-Pad Guide Bearing in Large Hydro-unit |
| title_full_unstemmed | Numerical Simulation of Nonlinear Oil Film Forces of
Tilting-Pad Guide Bearing in Large Hydro-unit |
| title_short | Numerical Simulation of Nonlinear Oil Film Forces of
Tilting-Pad Guide Bearing in Large Hydro-unit |
| title_sort | numerical simulation of nonlinear oil film forces of tilting pad guide bearing in large hydro unit |
| topic | Tilting-pad guide bearing Nonlinear oil film force Hydro-unit Computer numerical simulation. |
| url | http://dx.doi.org/10.1155/S1023621X00000324 |
| work_keys_str_mv | AT lifengma numericalsimulationofnonlinearoilfilmforcesoftiltingpadguidebearinginlargehydrounit AT xinzhizhang numericalsimulationofnonlinearoilfilmforcesoftiltingpadguidebearinginlargehydrounit |