Influence of mechanical sealing surface shape of marine stern shaft on sealing performance
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摘要: 针对船舶轴系轴线弯曲、轴系不对中、尾轴承磨损、螺旋桨水动力等多种因素导致的船舶尾轴机械密封性能不稳定问题, 应用经验公式与ANSYS有限元法, 研究了球面与平面2种密封面形状对密封性能的影响规律。在水深为200、400、600 m情况下, 分别建立了球面与平面密封面的热-结构耦合模型, 比较了2种机械密封的密封面接触面积、泄漏量、密封准数与单位面积摩擦功, 分析了2种机械密封面形状对变形、接触压力与温度等关键参数的影响规律。研究结果表明: 相同水深下, 球面密封的间隙区域与最大间隙均小于平面密封, 球面密封接触压力变化较平面密封平缓, 其最大接触压力仅为平面密封的40%~50%;随水深的增加, 2种密封面的接触压力、温度与变形均增大, 密封面的接触区域缩小, 间隙区域不断扩大; 当水深由200 m增加到600 m时, 球面密封的接触节点由10个减少为6个, 平面密封的接触节点由7个减少为4个; 当水深为200 m时, 球面密封面的最高温度比平面密封面低5.499℃; 球面密封的接触面积、泄漏量、密封准数与单位面积摩擦功均优于平面密封。可见, 球形密封能够提高船舶尾轴机械密封性能。Abstract: In allusion to the unstable performance of marine stern shaft mechanical seal caused by the factors such as marine shaft axis bending, shaft misalignment, the wear of stern bearing, the force of propeller, etc., the influence laws of both spherical and planar sealing surface shapes on sealing performance were researched by using both empirical formula and ANSYS finite element method.When water depths are 200, 400, 600 m, the thermal-structural coupling models of both spherical and planar sealing surface were established respectively.The contact areas, the leakage rates, the seal criterias, and the friction powers of unit area were compared, and the influence laws of both spherical and planar sealing surface shapes on the key parameters such as deformation, contact pressure, and temperature, etc., were discussed.Analysis result shows that under the same water depth, the clearance region and the maximum clearance of spherical seal are less than the values of planar seal.Compared to planar seal, the contact pressure of spherical seal changes more smoothly, and the maximum contact pressure of spherical seal is only 40%-50% of the pressure of planar seal. With the increasing of water depth, the contactpressure, temperature, and deformation of the two kinds of sealing surfaces increase, the contact region of sealing surface decrease, the clearance region extends gradually.When water depth increases from 200 m to 600 m, the contact node number of spherical seal decreases from 10 to 6, and the number of planar seal decreases from 7 to 4.When water depth is 200 m, the maximum temperature of spherical sealing surface is 5.499℃ lower than the value of planar sealing surface.The contact area, leakage rate, seal criteria, and the friction power of unit area of spherical seal are all better than the parameters of planar seal, so the spherical seal can improve the mechanical sealing performance of marine stern shaft.
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图 1 机械密封结构
1—动环座; 2—动环; 3—静环; 4—静环座; 5—弹簧; 6—弹簧座; 7—尾管; 8—舱壁; 9—尾轴; 10—O型密封圈; 11—固定环; 12—海水
Figure 1. Structures of mechanical seals
图 2 压力载荷边界条件
1—动环座; 2—动环; 3—静环座; 4—静环; 5—约束U
Figure 2. Boundary conditions of pressure loads
图 5 球面与平面密封轴向变形分布
Figure 5. Axial deformation distributions of spherical and planar seals
图 7 球面与平面密封接触压力分布
Figure 7. Contact pressure distributions of spherical and planar seals
表 1 球面与平面密封结构主要参数
Table 1. Key parameters of sealing structures of spherical and planar seals
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[1] 魏龙, 常新中, 张鹏高. 接触式机械密封端面泄漏模型的研究进展[J]. 流体机械, 2012, 40(2): 36-40. doi: 10.3969/j.issn.1005-0329.2012.02.008WEI Long, CHANG Xin-zhong, ZHANG Peng-gao. Progress of study on leakage models of contacting mechanical seal end faces[J]. Fluid Machinery, 2012, 40(2): 36-40. (in Chinese). doi: 10.3969/j.issn.1005-0329.2012.02.008 [2] 赫晓光, 王隽, 杨俊, 等. 船舶艉轴机械密封试验装置的设计及密封试验[J]. 润滑与密封, 2010, 35(2): 94-97. doi: 10.3969/j.issn.0254-0150.2010.02.024HE Xiao-guang, WANG Jun, YANG Jun, et al. The design of mechanical seal testing device of marine stern shaft and the sealing tests[J]. Lubrication Engineering, 2010, 35(2): 94-97. (in Chinese). doi: 10.3969/j.issn.0254-0150.2010.02.024 [3] MINET C, BRUNETIRE N, TOURNERIE B. A deterministic mixed lubrication model for mechanical seals[J]. Journal of Tribology, 2011, 133(4): 80-80. https://asmedigitalcollection.asme.org/tribology/article/133/4/042203/468693/A-Deterministic-Mixed-Lubrication-Model-for [4] NYEMECK A P, BRUNETIRE N, TOURNERIE B. A multiscale approach to the mixed lubrication regime: application to mechanical seals[J]. Tribology Letters, 2012, 47(3): 417-429. doi: 10.1007/s11249-012-9997-5 [5] 王玉玲, 姚翠翠, 惠英龙. 船舶艉轴机械密封环温度场与变形的理论研究[J]. 船舶工程, 2015, 37(3): 44-48. https://www.cnki.com.cn/Article/CJFDTOTAL-CANB201503015.htmWANG Yu-ling, YAO Cui-cui, HUI Ying-long. Study on temperature field and deformation of mechanical seal of ship stern shaft[J]. Ship Engineering, 2015, 37(3): 44-48. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-CANB201503015.htm [6] 丁雪兴, 吴昊, 严如奇, 等. 基于ANSYS的机械密封热力耦合变形计算及分析[J]. 兰州理工大学学报, 2014, 40(5): 41-45. https://www.cnki.com.cn/Article/CJFDTOTAL-GSGY201405010.htmDING Xue-xing, WU Hao, YAN Ru-qi, et al. Analysis and calculation of thermal stressing coupled deformation of mechanical seal based on ANSYS[J]. Journal of Lanzhou University of Technology, 2014, 40(5): 41-45. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-GSGY201405010.htm [7] 陶凯, 涂桥安, 孙见君, 等. 基于ANSYS的剖分式机械密封变形分析[J]. 润滑与密封, 2014, 39(3): 84-90. doi: 10.3969/j.issn.0254-0150.2014.03.019TAO Kai, TU Qiao-an, Sun Jian-jun, et al. Deformation analysis of the split mechanical seal based on ANSYS[J]. Lubrication Engineering, 2014, 39(3): 84-90. (in Chinese). doi: 10.3969/j.issn.0254-0150.2014.03.019 [8] YAN Guo-ping, LIU Zheng-lin, ZHU Xue-ming, et al. Numerical analysis of the thermal-field of ship stern-shaft mechanical sealed faces under the variational working conditions[J]. Journal of Ship Mechanics, 2008, 12(3): 483-489. [9] WU Da-zhuan, JIANG Xin-kuo, YANG Shuai, et al. Three dimensional coupling analysis of flow and thermal performance of a mechanical seal[J]. Journal of Thermal Science and Engineering Applications, 2014, 6(1): 1-9. [10] BAI Shao-xian, PENG Xu-dong, LI Ye-feng, et al. A hydrodynamic laser surface-textured gas mechanical face seal[J]. Tribology Letters, 2010, 38(2): 187-194. doi: 10.1007/s11249-010-9589-1 [11] Kim D K, Shon I J, Song J, et al. A study on the metal carbide composite diffusion bonding for mechanical seal[J]. Archives of Metallurgy and Materials, 2015, 60(2): 1479-1483. https://www.researchgate.net/publication/282518885_A_Study_On_The_Metal_Carbide_Composite_Diffusion_Bonding_For_Mechanical_Seal/fulltext/57a710ab08aee07544becbbb/A-Study-On-The-Metal-Carbide-Composite-Diffusion-Bonding-For-Mechanical-Seal.pdf [12] 王晓雪, 刘莹, 李京浩, 等. 核主泵用动静压波度机械密封机理[J]. 机械工程学报, 2010, 46(24): 131-135, 142. https://www.cnki.com.cn/Article/CJFDTOTAL-JXXB201024022.htmWANG Xiao-xue, LIU Ying, LI Jing-hao, et al. Mechanism of combined coning and waviness mechanical face seal for nuclear reactor coolant pump[J]. Journal of Mechanical Engineering, 2010, 46(24): 131-135, 142. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-JXXB201024022.htm [13] 彭旭东, 刘伟, 白少先, 等. 热弹变形对核主泵用流体静压型机械密封性能的影响[J]. 机械工程学报, 2010, 46(23): 146-153. https://www.cnki.com.cn/Article/CJFDTOTAL-JXXB201023020.htmPENG Xu-dong, LIU Wei, BAI Shao-xian, et al. Effects analysis of thermo-elastic deformation on the performance of hydrostatic mechanical seals in reactor coolant pumps[J]. Journal of Mechanical Engineering, 2010, 46(23): 146-153. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-JXXB201023020.htm [14] MINET C, BRUNETIERE N, TOURNERIE B, et al. Analysis and modeling of the topography of mechanical seal faces[J]. Tribology Transactions, 2010, 53(6): 799-815. [15] PUSTAN M, BELCIN O, BIRLEANU C. Mechanical seals with oscillating stator[J]. Meccanica, 2013, 48(5): 1191-1200. doi: 10.1007/s11012-012-9660-0 [16] DELGADO A, ANDRS L S. Identification of force coefficients in a squeeze film damper with a mechanical seal: large contact force[J]. Journal of Tribology, 2010, 132(3): 1-7. [17] TOMA M, LUNTZ J, BREI D, et al. Design and proof-ofconcept validation of a latched arch active seal[J]. Journal of Mechanical Design, 2012, 134(7): 1-12. https://energyresources.asmedigitalcollection.asme.org/SMASIS/proceedings/SMASIS2008/43314/709/328482 [18] WANG Tao, HUANG Wei-feng, LIU Xiang-feng, et al. Experimental study of two-phase mechanical face seals with laser surface texturing[J]. Tribology International, 2014, 72(2): 90-97. https://www.sciencedirect.com/science/article/pii/S0301679X1300412X [19] 邱明, 李正国, 李迎春, 等. 倾斜摆动条件下衬垫改性对自润滑关节轴承摩擦学性能的影响[J]. 摩擦学学报, 2014, 34(1): 59-64. https://www.cnki.com.cn/Article/CJFDTOTAL-MCXX201401009.htmQIU Ming, LI Zheng-guo, LI Ying-chun, et al. Effect of liner modification on the tribological properties of self-lubricating spherical plain bearings under tilting oscillation[J]. Tribology, 2014, 34(1): 59-64. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-MCXX201401009.htm [20] SCHOLES S C, UNSWORTH A. Wear studies on the likely performance of CFR-PEEK/CoCrMo for use as artificial joint bearing materials[J]. Journal of Materials Science: Materials in Medicine, 2009, 20(1): 163-170. doi: 10.1007/s10856-008-3558-3 [21] 高斌超, 孟祥铠, 李纪云, 等. 机械密封热力耦合有限元模型与密封性能分析[J]. 摩擦学学报, 2015, 35(5): 550-556. https://www.cnki.com.cn/Article/CJFDTOTAL-MCXX201505006.htmGAO Bin-chao, MENG Xiang-kai, LI Ji-yun, et al. Thermalmechanical coupled finite element model and seal performance analysis of mechanical seals[J]. Tribology, 2015, 35(5): 550-556. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-MCXX201505006.htm [22] 范维, 吴新跃. 舰船艉轴密封系统有限元法分析[J]. 舰船电子工程, 2008, 28(3): 122-124. https://www.cnki.com.cn/Article/CJFDTOTAL-JCGC200803038.htmFAN Wei, WU Xin-yue. Analyses in finite element method of the tail shaft sealing system[J]. Ship Electronic Engineering, 2008, 28(3): 122-124. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-JCGC200803038.htm [23] SHI Li-ping, HUANG Wei, WANG Xiao-lei, et al. A hydrodynamic model for dimpled mechanical gas seal considering interaction effect[J]. Transactions of Nanjing University of Aaeronautics and Astronautics, 2015, 32(4): 438-445. [24] BRUNETIRE N, APOSTOLESCU A. A simple approach to the thermoelastohydrodynamic behavior of mechanical face seals[J]. Tribology Transactions, 2009, 52(2): 243-255. [25] 朱学明. 机械密封性能的数值分析及优化研究[D]. 武汉: 武汉理工大学, 2005.ZHU Xue-ming. Research on numerical analysis and optimization of mechanical sealing performance[D]. Wuhan: Wuhan University of Technology, 2005. (in Chinese). -
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