As the first link element for the transmission of shaft vibration to the pedestal and even to the hull, water-lubricated bearing plays a key role in suppressing vibration. Although the porous structure is considered as one of the main methods for improving the wideband vibration and noise reduction performance of materials in many industrial fields, the studies in the field of water-lubricated bearing remain insufficient. To enhance vibration reduction performance, a fluid-saturated perforated slab is designed in this study, and via the establishment of a fluid-solid coupled vibration model, the influence law and impact levels were analyzed and verified by simulation and experiments. The results obtained verified that the total vibration amplitude of damping-enhanced stern bearing in the vertical direction was smaller than that of the normal stern bearing, and the reduction amplitude of the characteristic frequency agreed with the optimal value at approximately 0.1 of the volume fraction of the liquid phase when the solid-fluid phase was rubber–water. Additionally, the increase in fluid fraction did not enhance the damping effect, instead, it unexpectedly reduced the natural frequency of the raw material significantly. This research indicates that the design of the fluid-saturated perforated slab is effective in reducing the transmission of the vibration amplitude from the shaft, and presents the best volume fraction of the liquid phase.
Yong Jin
,
Jianjun Lu
,
Wu Ouyang
,
Zhenglin Liu
,
Kunsheng Lao
. Vibration Reduction Performance of Damping-Enhanced Water-Lubricated Bearing Using Fluid-Saturated Perforated Slabs[J]. Chinese Journal of Mechanical Engineering, 2020
, 33(6)
: 92
-92
.
DOI: 10.1186/s10033-020-00516-5
As the first link element for the transmission of shaft vibration to the pedestal and even to the hull, water-lubricated bearing plays a key role in suppressing vibration. Although the porous structure is considered as one of the main methods for improving the wideband vibration and noise reduction performance of materials in many industrial fields, the studies in the field of water-lubricated bearing remain insufficient. To enhance vibration reduction performance, a fluid-saturated perforated slab is designed in this study, and via the establishment of a fluid-solid coupled vibration model, the influence law and impact levels were analyzed and verified by simulation and experiments. The results obtained verified that the total vibration amplitude of damping-enhanced stern bearing in the vertical direction was smaller than that of the normal stern bearing, and the reduction amplitude of the characteristic frequency agreed with the optimal value at approximately 0.1 of the volume fraction of the liquid phase when the solid-fluid phase was rubber–water. Additionally, the increase in fluid fraction did not enhance the damping effect, instead, it unexpectedly reduced the natural frequency of the raw material significantly. This research indicates that the design of the fluid-saturated perforated slab is effective in reducing the transmission of the vibration amplitude from the shaft, and presents the best volume fraction of the liquid phase.
[1] R L Orndorff, R C Spangler. SPA super demountable bearing: US6648510 B2. 2003-11-18.
[2] J M Peng, J X Wang. Research on key technologies to improve bearing capacity of water-lubricated bearing. Journal of Agricultural Machinery, 2005, 36(6): 149-151. (in Chinese)
[3] F M Kuang, X C Zhou, J Huang, et al. Tribological properties of Nitrile Rubber/UHMWPE/Nano-MoS2 water-lubricated bearing material under low speed and heavy duty. Journal of Tribology, 2018, 140(6): 061301.
[4] J Huang, X R Zhou, X Z Zhou, et al. Study on preparation process of a new UHMWPE/graphite/NBR water lubricated bearing material. The 4nd International Conference on Transportation Information and Safety, Canada, 2017: 907-910.
[5] T Chang, C Q Yuan, Z W Guo. Tribological behavior of aged UHMWPE under water-lubricated condition. Tribology International, 2019, 133(1): 1-11.
[6] K Li, J X Wang, Y Guo, et al. Analysis of the impact of slats on friction noise of water-lubricated rubber bearing. Journal of Mechanical Transmission, 2013(11): 138-141. (in Chinese)
[7] Tala-Ighil N, Fillon M. A numerical investigation of both thermal and texturing surface effects on the journal bearings static characteristics. Tribology International, 2015, 90: 228-239.
[8] N Tala-Ighil, M Fillon, P Maspeyrot. Effect of textuted area on the performances of a hydrodynamic journal bearing. Tribology International, 2011, 44: 211-219.
[9] A Blatter, M Maillat, S M Pimenov, et al. Lubricated sliding performance of laser-patterned sapphire. Wear, 1999, 232: 226-230.
[10] Wojciech Litwin. 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. Tribology International, 2015, 82(A): 153-161.
[11] V Bhardwaj, R K Pandey, V K Agarwal. Performance studies of textured race ball bearing. Industrial Lubrication and Tribology, 2019, 71(9): 1116-1124.
[12] J Dong, X J Wang, J Zhang, et al. An experimental research on the vibration of surface-textured journal bearings. Shock & Vibration, 2017: 1-9.
[13] U Sudeep. Comparisons of tribological and vibration behaviors of textured point contacts of bearing steel lubricated with oil and grease under starved conditions. Journal of Tribology, 2016, 138(3): 1-12.
[14] H Yamada. Numerical and experimental analyses of the dynamic characteristics of journal bearings with square dimples. Journal of Tribology, 2018, 140(1): 1-10.
[15] S Adamczak, P Zmarzły. Research of the influence of the 2D and 3D surface roughness parameters of bearing raceways on the vibration level. Journal of Physics: Conference Series, 2019, 1183 (Conference 1): 012001.
[16] J Yang, Z L Liu, Q C Chen, et al. The effect of wear on the frictional vibration suppression of water-lubricated rubber slat with/without surface texture. Wear, 2019, 426-427(B): 1304-1317.
[17] K Okada, M Yoshida. Copper-graphite brushes lined with porous metals. Electrical Contacts, 1991. Proceedings of the Thirty-Seventh IEEE Holm Conference on. IEEE, 2002: 149-152.
[18] D Shan, Y Han. Static & dynamic performances analysis and optimization design for the whole casting column of a certain high-speed horizontal machining center using ABAQUS. IEEE International Conference on Information Management and Engineering, 2010: 367-371.
[19] F X Zhou, D Li, X L Cao. Random vibration of fluid-satuated porous elastic plates. Journal of Vibration and Shock, 2017(36): 169-174. (in Chinese)
[20] C S Rajesh, I P Nayan. Impact of various and arbitrary porous structure in the study of squeeze step bearing lubricated with magnetic fluid considering variable magnetic field. Journal of Engineering Tribology, 2015, 229(5): 646-659.
[21] S J Eder, C Ielchici, S Krenn, et al. An experimental framework for determining wear in porous journal bearings operated in the mixed lubrication regime. Tribology International, 2018, 123: 1-9.
[22] Yanguo Yin, Guotao Zhang. Lubrication and friction of porous oil bearing materials. IntechOpen, 72620, Chapter 7: 113-122.
[23] S Shitendu, K G Sisir. Comparison between steady-state characteristics of isotropic and anisotropic doubled-layered porous journal bearings under coupled stress lubrication. IOP Conf. Series: Materials Science and Engineering, 2018(377), 012106: 1-6.
[24] N M Bujurke, N B Naduvinamani. On the performance of narrow porous journal bearing lubricated with couple stress fluid. Acta Mechanica, 1991, 86(1-4): 179-191.
[25] S Ohishi. Bearing clearance in design calculation for porousaerostatic thrust bearings. Seimitsu Kogaku Kaishi/Journal of the Japan Society for Precision Engineering, 2018, 84(11): 931-935.
[26] N Sharma. Adiabatic analysis of microtextured porous journal bearings functioned with power law fluid model. Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2019, 233(10): 1541-1553.
[27] N Sharma, R K Sharma, Sunil, et al. A comparative study for lubrication of surface textured porous journal bearing with two different non-Newtonian fluid models. International Journal of Surface Science and Engineering, 2016, 10(5): 485-502.
[28] Z W Wu, X M Sun, H F Xu, et al. Microstructural characterization and in-situ sulfur isotopic analysis of silver-bearing sphalerite from the Edmond hydrothermal field. Central Indian Ridge Ore Geology Reviews, 2018, 92(1): 318-347.
[29] S Lee, D Jang, X Y Wang, et al. Lubrication characteristics of a textured porous sliding bearing. Advances in Mechanical Engineering, 2015, 7(3): 404-415.
[30] Y Jin, Z L Liu, Y Z Tian, et al. Vibration monitoring of ship stern bearing based on pulse system. Journal of Wuhan University of Technology, 2010, 32(6): 84-89. (in Chinese)
