Distributed dynamics characteristics of water-lubricated stern bearing under offset load

OUYANG Wu; CHENG Qi-chao; WANG Lei; JIN Yong

doi:10.19818/j.cnki.1671-1637.2019.02.009

Volume 19 Issue 2

Turn off MathJax

Article Contents

Article Navigation > Journal of Traffic and Transportation Engineering > 2019 > 19(2): 92-100

Next Previous

OUYANG Wu, CHENG Qi-chao, WANG Lei, JIN Yong. Distributed dynamics characteristics of water-lubricated stern bearing under offset load[J]. Journal of Traffic and Transportation Engineering, 2019, 19(2): 92-100. doi: 10.19818/j.cnki.1671-1637.2019.02.009

Citation:

OUYANG Wu, CHENG Qi-chao, WANG Lei, JIN Yong. Distributed dynamics characteristics of water-lubricated stern bearing under offset load[J]. Journal of Traffic and Transportation Engineering, 2019, 19(2): 92-100. doi: 10.19818/j.cnki.1671-1637.2019.02.009

Citation:

PDF( 7453 KB)

Distributed dynamics characteristics of water-lubricated stern bearing under offset load

doi: 10.19818/j.cnki.1671-1637.2019.02.009

OUYANG Wu^{1, 2, 3
,},
CHENG Qi-chao¹,
WANG Lei⁴,
JIN Yong^{1, 3}

1.
School of Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063, Hubei, China
2.
National Engineering Research Center for Water Transportation Safety, Wuhan University of Technology, Wuhan 430063, Hubei, China
3.
Key Laboratory of Marine Power Engineering and Technology of Ministry of Communications, Wuhan University of Technology, Wuhan 430063, Hubei, China
4.
Chinese Research and Design Center of Ship, Wuhan 430064, Hubei, China

More Information

Author Bio:
OUYANG Wu (1987-), male, associate professor, PhD, ouyangw@whut.edu.cn
Received Date: 2018-09-09
Publish Date: 2019-04-25

Abstract

Abstract

In order to reveal the hydrodynamics behavior of water-lubricated stern bearing with a large length-diameter ratio under offset load, a test method of distributed dynamics characteristics parameters was proposed. A large-size water-lubricated stern bearing with a diameter of 324 mm and a length of 1 200 mm was tested on a large-scale propulsion shafting simulation test stand. Three cross sections of the bearing were selected along the axis direction, and two eddy current sensors perpendicular to each other were arranged on each cross section to obtain the axis orbits. At the same time, four cross sections of the shaft were selected along the axis direction and each section installed with a micro pressure sensor, respectively, and the signals of water film pressure distributions of the sections were obtained by the wireless telemetry. The inclined angle of the axis was adjusted by changing the elevation of the adjacent bearing, and the influence rules of rotation speed and elevation on the water film pressure distribution and running state of journal of test bearing were studied. Research result shows that the pressure test value of the section closest to the cantilever end due to the offset load is obviously larger than that of other sections, and the maximum value is about 3.6 MPa. The lubrication state of the bearing is partitioned along the axial direction, and the closer to the cantilever end, the more obvious the elastohydrodynamic lubrication characteristics. Different bearing segments need different speeds to generate hydrodynamic water film. The "water pocket" at the top of pressure curve of the section closest to the cantilever end appears with the increase of the rotating speed, but it is not obvious at 220 r·min^-1. The negative pressure phenomenon appears in the pressure distribution of each section. The spatial form of the journal in the bearing hole is relatively complex. The journal severely bends down on both sides of the bearing and arches in the middle, and the deflection angles of different bearing sections are different. The farther away from the cantilever end, the larger the axis orbit area. Compared with the bearing with a single lubrication state and a straight journal, the hydrodynamics model of water-lubricated stern bearing with large length-diameter ratio under offset load should take into account the factors, such as the zoning characteristics of lubrication state, the bending state of the shaft and the negative pressure phenomenon.
- marine engineering,
- water-lubricated stern bearing,
- pressure distribution,
- axis orbit,
- wireless telemetry,
- distributed characteristic

FullText(HTML)

References(31)

References

[1]	YAN Xin-ping, YUAN Cheng-qing, BAI Xiu-qin, et al. Research status and advances of tribology of green ship[J]. Tribology, 2012, 32 (4): 410-420. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-MCXX201204015.htm
[2]	YAN Xin-ping, LIANG Xing-xin, LIU Zheng-lin, et al. Research progress of marine water lubricated stern bearing[J]. Shipbuilding of China, 2017, 58 (3): 221-232. (in Chinese). doi: 10.3969/j.issn.1000-4882.2017.03.022
[3]	ORNDORFFJR R J. New UHMWPE/rubber bearing alloy[J]. Journal of Tribology, 2000, 122 (1): 367-373. doi: 10.1115/1.555361
[4]	SHI Fang-hui, SALANT R F. A mixed soft elastohy-drodynamic lubrication model with interasperity cavitation and surface shear deformation[J]. Journal of Tribology, 2000, 122 (1): 308-316. doi: 10.1115/1.555358
[5]	HOOKE C J, O'DONOGHUE J P. Elastohydrodynamic lubrication of soft, highly deformed contacts[J]. Journal of Mechanical Engineering Science, 1972, 14 (1): 34-48. doi: 10.1243/JMES_JOUR_1972_014_008_02
[6]	HOOKE C J. Roughness in soft elastohydrodynamically lubricated contacts—attenuation and the complementary wave reassessed[J]. Journal of Engineering Tribology, 2015, 230 (11): 1325-1335.
[7]	HOOKE C J, HUANG P. Elastohydrodynamic lubrication of soft viscoelastic materials in line contact[J]. Journal of Engineering of Tribology, 1997, 211: 185-194.
[8]	LAHMAR M, ELLAGOUNE S, BOU-SAÏD B. Elastohydro-dynamic lubrication analysis of a compliant journal bearing considering static and dynamic deformations of the bearing liner[J]. Tribology Transactions, 2010, 53 (3): 349-368. doi: 10.1080/10402000903312356
[9]	HU Yuan-zhong, ZHU Dong. A full numerical solution to the mixed lubrication in point contacts[J]. Journal of Tribology, 2000, 122 (1): 1-9. doi: 10.1115/1.555322
[10]	DE KRAKER A, VAN OSTAYEN R A, RIXEN D J. Calculation of stribeck curves for (water) lubricated journal bearings[J]. Tribology International, 2007, 40 (3): 459-469. doi: 10.1016/j.triboint.2006.04.012
[11]	WANG Yue-chang, LIU Ying, HUANG Wei-feng, et al. The progress and engineering application of theoretical model for mixed lubrication[J]. Tribology, 2016, 36 (4): 520-530. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-MCXX201604018.htm
[12]	HAN Yan-feng, XIONG Shang-wu, WANG Jia-xu, et al. A new singularity treatment approach for journal-bearing mixed lubrication modeled by the finite difference method with a herringbone mesh[J]. Journal of Tribology, 2016, 138 (1): 011704-1-10. doi: 10.1115/1.4031138
[13]	OUYANG Wu, CHEN Run-lin, PENG Lin, et al. Main stiffness and main damping of sliding bearings considering local contact[J]. Journal of Xi'an Jiaotong University, 2014, 48 (1): 112-117. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-XAJT201401019.htm
[14]	OUYANG Wu, ZHANG Xue-bing, JIN Yong, et al. Experimental study on the dynamic performance of water-lubricated rubber bearings with local contact[J]. Shock and Vibration, 2018, 2018: 1-10.
[15]	QIN Hong-lin, ZHOU Xin-cong, ZHAO Xin-ze, et al. A new rubber/UHMWPE alloy for water-lubricated stern bearings[J]. Wear, 2015, 328/329: 257-261. doi: 10.1016/j.wear.2015.02.016
[16]	DONG Cong-lin, SHI Li-chun, LI Lyu-zhou, et al. Stick-slip behaviours of water lubrication polymer materials under low speed conditions[J]. Tribology International, 2017, 106: 55-61. doi: 10.1016/j.triboint.2016.10.027
[17]	ZHANG Zhen-guo, ZHANG Zhi-yi, HUANG Xiu-chang, et al. Stability and transient dynamics of a propeller-shaft system as induced by nonlinear friction acting on bearing-shaft contact interface[J]. Journal of Sound and Vibration, 2014, 333 (12): 2608-2630. doi: 10.1016/j.jsv.2014.01.026
[18]	MITSUI J, AKUTSU Y. Analysis of shaft alignment taking oil film characteristics of stern tube bearing into consideration: Part 1, theoretical analysis[J]. Bulletin of JSME, 1984, 27 (224): 317-324. doi: 10.1299/jsme1958.27.317
[19]	MURAWSKI L. Shaft line alignment analysis taking ship construction flexibility and deformations into consideration[J]. Marine Structures, 2005, 18 (1): 62-84. doi: 10.1016/j.marstruc.2005.05.002
[20]	HE Tao, ZOU De-quan, LU Xi-qun, et al. Mixed-lubrication analysis of marine stern tube bearing considering bending deformation of stern shaft and cavitation[J]. Tribology International, 2014, 73: 108-116. doi: 10.1016/j.triboint.2014.01.013
[21]	LITWIN W. Influence of local bush wear on water lubricated sliding bearing load carrying capacity[J]. Tribology International, 2016, 103: 352-358. doi: 10.1016/j.triboint.2016.06.044
[22]	SUN Jun, ZHU Xin-long, ZHANG Liang, et al. Effect of surface roughness, viscosity-pressure relationship and elastic deformation on lubrication performance of misaligned journal bearings[J]. Industrial Lubrication and Tribology, 2014, 66 (3): 337-345. doi: 10.1108/ilt-12-2011-0110
[23]	XU Guo-hui, ZHOU Jian, GENG Hai-peng, et al. Research on the static and dynamic characteristics of misaligned journal bearing considering the turbulent and thermohydrodynamic effects[J]. Journal of Tribology, 2015, 137 (2): 024504-1-8. doi: 10.1115/1.4029333
[24]	ZHANG Xiu-li, YIN Zhong-wei, JIANG Dan, et al. Load carrying capacity of misaligned hydrodynamic water-lubricated plain journal bearings with rigid bush materials[J]. Tribology International, 2016, 99: 1-13. doi: 10.1016/j.triboint.2016.02.038
[25]	CABRERA D L, WOOLLEY N H, ALLANSON D R, et al. Film pressure distribution in water-lubricated rubber journal bearings[J]. Journal of Engineering Tribology, 2005, 219: 125-132.
[26]	ZHOU Guang-wu, WANG Jia-xu, HAN Yan-feng, et al. An experimental study on film pressure circumferential distribution of water lubricated rubber bearings with multiple grooves[J]. Tribology Transactions, 2017, 60 (3): 385-391. doi: 10.1080/10402004.2016.1163760
[27]	LITWIN W. Experimental research on water lubricated three layer sliding bearing with lubrication grooves in the upper part of the bush and its comparison with a rubber bearing[J]. Tribology International, 2015, 82: 153-161. doi: 10.1016/j.triboint.2014.10.002
[28]	LITWIN W. Properties comparison of rubber and three layer PTFE-NBR-bronze water lubricated bearings with lubricating grooves along entire bush circumference based on experimental tests[J]. Tribology International, 2015, 90: 404-411. doi: 10.1016/j.triboint.2015.03.039
[29]	LITWIN W, DYMARSKI C. Experimental research on water lubricated marine stern tube bearings in conditions of improper lubrication and cooling causing rapid bush wear[J]. Tribology International, 2016, 95: 449-455. doi: 10.1016/j.triboint.2015.12.005
[30]	WANG Nan, MENG Qing-feng, WANG Peng-peng, et al. Experimental research on film pressure distribution of water-lubricated rubber bearing with multiaxial grooves[J]. Journal of Fluids Engineering, 2013, 135 (8): 084501-1-6. doi: 10.1115/1.4024147
[31]	PIERRE I, BOUYER J, FILLON M. Thermohydrodynamic behavior of misaligned plain journal bearings: theoretical and experimental approaches[J]. Tribology Transactions, 2004, 47 (4): 594-604. doi: 10.1080/05698190490513974

Relative Articles

Supplements(0)

Cited By

Get Citation

PDF

XML

Article Metrics

Article views (1101) PDF downloads(309)

Distributed dynamics characteristics of water-lubricated stern bearing under offset load

doi: 10.19818/j.cnki.1671-1637.2019.02.009

Abstract

References

Catalog

Article Metrics

Related

Distributed dynamics characteristics of water-lubricated stern bearing under offset load

doi: 10.19818/j.cnki.1671-1637.2019.02.009

Abstract

References

Catalog

Article Metrics

Related

Export File

Citation

Format

Content