| MECHANICAL ENGINEERING |
|
|
|
|
|
Experimental investigation to improve marine diesel engine crankcase shaft seals |
| CAO Hengchao1, XU Yiren2, SUN Nannan1, HAN Chengmin1, ZHU Guixiang1, LI Yongjian2 |
1. Weichai Power Co., Ltd., Weifang 261061, China;
2. State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China |
|
|
|
|
Abstract A sealing leakage test system for gas-liquid mixtures was developed to measure oil leakage from shaft seals on large marine diesel engine crankcases. The air and oil leakage rates were then measured for various rotational speeds and the leakage reducing function of the oil slinger, labyrinth grooves and oil return channels were studied quantitatively. A brush seal design was then developed that was appropriate for the large shaft diameters and large clearances in crankcase shaft seals. A porous media model of the brush seal was then used to analyze the influence of the brush seal on the leakage and the flow field. The effect of the brush seal on the leakage was also studied on the sealing leakage test system. The results show that the brush seal reduces the air leakage rate by 76% and the oil leakage rate by 79%.
|
| Keywords
diesel engine crankcase
labyrinth seal
brush seal
two-phase flow
|
|
Issue Date: 18 August 2022
|
|
|
[1] 张晗, 闫大海, 钱治强. 船用柴油机发展趋势分析[J]. 舰船科学技术, 2021, 43(17): 137-141. ZHANG H, YAN D H, QIAN Z Q. Development trend analysis of marine diesel engine[J]. Ship Science and Technology, 2021, 43(17): 137-141. (in Chinese)
[2] 丁淑富, 孙笋升, 冯细文. 我国船用大功率柴油机产业现状及发展趋势分析[J]. 柴油机, 2012, 34(5): 1-5. DING S F, SUN S S, FENG X W. Development prospect of the domestic large power marine diesel engine industry[J]. Diesel Engine, 2012, 34(5): 1-5. (in Chinese)
[3] 郭志强, 门日秀, 闫柯, 等. 涡轮增压器甩油环密封性能研究[J]. 西安交通大学学报, 2019, 53(10): 143-150. GUO Z Q, MEN R X, YAN K, et al. Sealing performance of turbocharger oil slinger[J]. Journal of Xi’an Jiaotong University, 2019, 53(10): 143-150. (in Chinese)
[4] YANG S P, TAN B S, DENG X F. Numerical and experimental investigation of the sealing effect of a specific labyrinth seal structure[J]. Mathematical Problems in Engineering, 2019: 9851314.
[5] 徐继林. 某型主机轴封泄漏故障实例[J]. 航海技术, 2018(6): 41-43. XU J L. Fault example for shaft seal leakage of main engine[J]. Marine Technology, 2018(6): 41-43. (in Chinese)
[6] 李军, 李志刚, 张元桥, 等. 刷式密封技术的研究进展[J]. 航空发动机, 2019, 45(2): 74-84. LI J, LI Z G, ZHANG Y Q, et al. Research progress of brush seal technology[J]. Aeroengine, 2019, 45(2): 74-84. (in Chinese)
[7] 唐小勇. 气液两相刷式密封的性能研究[D]. 北京: 北京化工大学, 2018. TANG X Y. Study on the perfomance of gas-liquid two-phase brush seal[D]. Beijing: Beijing University of Chemical Technology, 2018. (in Chinese)
[8] OUTIRBA B, HENDRICK P. Influence of lubrication oil on the performance of carbon fibre brush seals for aero-engines bearing chambers[C]// Proceedings of ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. Phoenix USA, 2019.
[9] INGISTOV S. Non-metallic brush seal in heavy duty GT units, GE-made frame No.7, model EA[C]// Proceedings of ASME Turbo Expo 2007: Power for Land, Sea, and Air. Montreal, Canada, 2007: 595-601.
[10] 黄首清, 索双富, 李永健, 等. 刷式密封流场和温度场的3维数值计算[J]. 清华大学学报(自然科学版), 2014, 54(6): 805-810. HUANG S Q, SUO S F, LI Y J, et al. Numerical predictions of the flow and temperature distributions in a three-dimensional brush seal model[J]. Journal of Tsinghua University (Science and Technology), 2014, 54(6): 805-810. (in Chinese)
[11] FERGUSON J G. Brushes as high performance gas turbine seals[C]// Proceedings of ASME 1988 International Gas Turbine and Aeroengine Congress and Exposition. Amsterdam, The Netherlands, 1988.
[12] MENENDEZ R P, XIA J. Recent developments in brush seals for large industrial gas turbines[C]// Proceedings of the 36th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit. Las Vegas, USA, 2000.
[13] GRESHAM T G, WEAVER B K, WOOD H G, et al. Characterization of brush seal permeability[C]// Proceedings of ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. Seoul, South Korea, 2016.
[14] HILDEBRANDT M, SCHWITZKE C, BAUER H J. Analysis of heat flux distribution during brush seal rubbing using CFD with porous media approach[J]. Energies, 2021, 14(7): 1888.
[15] DOGU Y. Investigation of brush seal flow characteristics using bulk porous medium approach[J]. Journal of Engineering for Gas Turbines and Power, 2005, 127(1): 136-144. |
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
2022,
Vol. 62
