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Publishing Language: Chinese

Experimental investigation to improve marine diesel engine crankcase shaft seals

Hengchao CAO1, Yiren XU2, Nannan SUN1, Chengmin HAN1, Guixiang ZHU1, Yongjian LI2( )
Weichai Power Co., Ltd., Weifang 261061, China
State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
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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 crankcaselabyrinth sealbrush sealtwo-phase flow
CLC number: TB42 Document code: A Article ID: 1000-0054(2022)09-1532-07

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Journal of Tsinghua University (Science and Technology)
Volume 62 Issue 9,
September 2022
Pages 1532-1538
DOI: 10.16511/j.cnki.qhdxxb.2022.22.045
Cite this article:
CAO H, XU Y, SUN N, et al. Experimental investigation to improve marine diesel engine crankcase shaft seals. Journal of Tsinghua University (Science and Technology), 2022, 62(9): 1532-1538. https://doi.org/10.16511/j.cnki.qhdxxb.2022.22.045

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Received: 12 April 2022
Published: 15 September 2022
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