Influence of Design Parameters on Static Bifurcation Behavior of Magnetic Liquid Double Suspension Bearing
Magnetic liquid double suspension bearing (MLDSB) includes electromagnetic system and hydrostatic system, and the bearing capacity and stiffness can be greatly improved. It is very suitable for the occasions of medium speed, heavy load, and starting frequently. Due to the mutual coupling and interac...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | International Journal of Aerospace Engineering |
| Online Access: | http://dx.doi.org/10.1155/2021/6646235 |
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| author | Jianhua Zhao Xiaochen Wu Fang Han Xuchao Ma Weidong Yan Yingna Liang Dianrong Gao Guojun Du |
| author_facet | Jianhua Zhao Xiaochen Wu Fang Han Xuchao Ma Weidong Yan Yingna Liang Dianrong Gao Guojun Du |
| author_sort | Jianhua Zhao |
| collection | DOAJ |
| description | Magnetic liquid double suspension bearing (MLDSB) includes electromagnetic system and hydrostatic system, and the bearing capacity and stiffness can be greatly improved. It is very suitable for the occasions of medium speed, heavy load, and starting frequently. Due to the mutual coupling and interaction between electromagnetic system and hydrostatic system, the probability and degree of static bifurcation are greatly increased and the operation stability is reduced. And flow of bearing cavity, coil current, oil film thickness, and galvanized layer thickness are the key parameters to ensure operation safe and stable, which has an important influence on the static bifurcation behavior. So this article intends to establish the coupling model of MLDSB to reveal the range of parameter combination in the case of static bifurcation. The influences of different parameter groups on the singularity characteristics, phase trajectory, x−t curves, and suction basin of the single DOF bearing system are analyzed. The result shows that there are nonzero singularities and static bifurcation occurs when ε2>0 or δ2>0. As the flow of bearing cavity, coil current, oil film thickness, and galvanized layer thickness changes in turn, the singularities will convert between stable focus, unstable focus, stable node, and saddle point, and then the stable limit cycle may be generated. The attractiveness of singularity will change greatly with the flow of the bearing cavity and coil current changes slightly in the case of small current or large flow. The minimal change of galvanized layer thickness will lead to the fundamental change of the final stable equilibrium point of the rotor, while the final equilibrium point is slightly affected by the oil film thickness. This study can provide a reference for the supporting stability of MLDSB. |
| format | Article |
| id | doaj-art-f1305f2b4bfa48bea2540fa2cd6724c4 |
| institution | DOAJ |
| issn | 1687-5966 1687-5974 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Aerospace Engineering |
| spelling | doaj-art-f1305f2b4bfa48bea2540fa2cd6724c42025-08-20T03:20:47ZengWileyInternational Journal of Aerospace Engineering1687-59661687-59742021-01-01202110.1155/2021/66462356646235Influence of Design Parameters on Static Bifurcation Behavior of Magnetic Liquid Double Suspension BearingJianhua Zhao0Xiaochen Wu1Fang Han2Xuchao Ma3Weidong Yan4Yingna Liang5Dianrong Gao6Guojun Du7Fluid Power Transmission and Control Laboratory, Yanshan University, Qinhuangdao 066004, ChinaFluid Power Transmission and Control Laboratory, Yanshan University, Qinhuangdao 066004, ChinaFluid Power Transmission and Control Laboratory, Yanshan University, Qinhuangdao 066004, ChinaFluid Power Transmission and Control Laboratory, Yanshan University, Qinhuangdao 066004, ChinaFluid Power Transmission and Control Laboratory, Yanshan University, Qinhuangdao 066004, ChinaLiren College, Yanshan University, Qinhuangdao 066004, ChinaFluid Power Transmission and Control Laboratory, Yanshan University, Qinhuangdao 066004, ChinaCollege of Civil Engineering and Mechanics, Yanshan University, Qinhuangdao 066004, ChinaMagnetic liquid double suspension bearing (MLDSB) includes electromagnetic system and hydrostatic system, and the bearing capacity and stiffness can be greatly improved. It is very suitable for the occasions of medium speed, heavy load, and starting frequently. Due to the mutual coupling and interaction between electromagnetic system and hydrostatic system, the probability and degree of static bifurcation are greatly increased and the operation stability is reduced. And flow of bearing cavity, coil current, oil film thickness, and galvanized layer thickness are the key parameters to ensure operation safe and stable, which has an important influence on the static bifurcation behavior. So this article intends to establish the coupling model of MLDSB to reveal the range of parameter combination in the case of static bifurcation. The influences of different parameter groups on the singularity characteristics, phase trajectory, x−t curves, and suction basin of the single DOF bearing system are analyzed. The result shows that there are nonzero singularities and static bifurcation occurs when ε2>0 or δ2>0. As the flow of bearing cavity, coil current, oil film thickness, and galvanized layer thickness changes in turn, the singularities will convert between stable focus, unstable focus, stable node, and saddle point, and then the stable limit cycle may be generated. The attractiveness of singularity will change greatly with the flow of the bearing cavity and coil current changes slightly in the case of small current or large flow. The minimal change of galvanized layer thickness will lead to the fundamental change of the final stable equilibrium point of the rotor, while the final equilibrium point is slightly affected by the oil film thickness. This study can provide a reference for the supporting stability of MLDSB.http://dx.doi.org/10.1155/2021/6646235 |
| spellingShingle | Jianhua Zhao Xiaochen Wu Fang Han Xuchao Ma Weidong Yan Yingna Liang Dianrong Gao Guojun Du Influence of Design Parameters on Static Bifurcation Behavior of Magnetic Liquid Double Suspension Bearing International Journal of Aerospace Engineering |
| title | Influence of Design Parameters on Static Bifurcation Behavior of Magnetic Liquid Double Suspension Bearing |
| title_full | Influence of Design Parameters on Static Bifurcation Behavior of Magnetic Liquid Double Suspension Bearing |
| title_fullStr | Influence of Design Parameters on Static Bifurcation Behavior of Magnetic Liquid Double Suspension Bearing |
| title_full_unstemmed | Influence of Design Parameters on Static Bifurcation Behavior of Magnetic Liquid Double Suspension Bearing |
| title_short | Influence of Design Parameters on Static Bifurcation Behavior of Magnetic Liquid Double Suspension Bearing |
| title_sort | influence of design parameters on static bifurcation behavior of magnetic liquid double suspension bearing |
| url | http://dx.doi.org/10.1155/2021/6646235 |
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