某型低速柴油机主轴承盖在设计时,采用与竖直方向倾斜的轴承盖螺栓,其目的在于:轴承盖螺栓预紧时产生的水平分力使主轴承盖两侧张开,以实现主轴承盖的自动居中定位作用。本文通过主轴承盖张紧和安装实验,验证了主轴承盖在螺栓预紧力作用下能够实现自动居中定位的作用。然后通过有限元分析,研究螺栓预紧载荷与主轴承盖变形量之间的规律,并得到主轴承盖与轴承座接触面之间的摩擦系数,对实验结果进行很好的验证和补充。
During the design process of main bearing cap for a low-speed diesel engine, the tilt main bearing cap bolts are used, the purpose is that:the horizontal force generated by the preload of the bolts, makes the bearing cap open on both sides, then the automatic center location of the cap is achieved. In the tensioning and assemble experiment, it was verified that the automatic location of the cap can be achieved via main bearing cap bolts tensioning. Then the influence law of the tensioning force on slip displacement of the cap was studied by finite element method, and the friction coefficient between the contact surfaces of bearing cap and the bearing block was obtained, which validated and supplied the experiment.
2017,39(9): 96-100 收稿日期:2016-09-23
DOI:10.3404/j.issn.1672-7619.2017.09.019
分类号:U664.121
基金项目:工业和信息化部高技术船舶科研资助项目(工信部联装[2011]528号)
作者简介:王奎(1988-),男,硕士研究生,助理工程师,研究方向为发动机结构强度及疲劳分析
参考文献:
[1] 石勇, 李盛, 景国玺, 等. 493柴油机机体强度及缸孔安装变形有限元分析[J]. 柴油机, 2010, 32(2):29-33. SHI Yong, LI Sheng, JING Guo-xi, et al. FE analysis of diesel block strength and cylinder distortion of 493 diesel engine[J]. Disesel Engine, 2010, 32(2):29-33.
[2] 王磊, 廖日东. 安装状态下柴油机主轴承孔及主轴瓦变形计算研究[J]. 内燃机工程, 2013, 34(6):70-75. WANG Lei, LIAO Ri-dong. Computational study of main bearing bore and bush deformation in assembly state[J]. Chinese Internal Combustion Engine Enginering, 2013, 34(6):70-75.
[3] 龙哲, 张翼, 苗会. 柴油机机体-主轴承盖接触面有限元分析[J]. 内燃机与配件, 2014(11):33-36. LONG Zhe, ZHANG Yi, MIAO Hui. Finite element analysis for diesel engine block main bearing cap interface[J]. Internal Combustion Engine and accessory, 2014(11):33-36.
[4] 龙凯, 左正兴. 基于拓扑优化和形状优化方法的主轴承盖结构设计[J]. 农业机械学报, 2008, 39(4):152-156. LONG Kai, ZUO Zheng-xing. Structural design of main bearing cap based on topological optimization and shape optimization[J]. Chinese Journal of Agricultural Machinery, 2008, 39(4):152-156.
[5] 刘洪德, 王彦伟, 赵际燕, 等. 主轴承盖结构优化设计[J]. 内燃机与动力装置, 2011(4):26-28. LIU Hong-de, WANG Yan-wei, ZHAO Ji-yan, et al. Optimization design of main bearing cap structure[J]. I. C. E & Powerplant, 2011(4):26-28.
[6] 刘志英, 黎秀宇. 柴油机主轴承盖工艺方案分析及工装设计[J]. 机械工程师, 2013(9):25-26. LIU Zhi-ying, LI Xiu-yu. Process analysis and fixture design for the bearing cover of crude oil engine[J]. Mechanical Engineering, 2013(9):25-26.
[7] 徐鲁杰, 聂志斌. 某型柴油机主轴承盖双头螺柱断裂原因分析[J]. 内燃机, 2014(1):60-62. XU Lu-jie, NIE Zhi-bin. Fracture analysis of stub for main bearing cover in a diesel engine[J]. Internal Combustion Engine, 2014(1):60-62.
[8] 徐辉. 某柴油发动机主轴承盖螺栓拧紧规范研究[J]. 柴油机, 2014, 36(2):19-26. XU Hui. Research on tightening specification for certain diesel engine's main bearing cap-screws[J]. Diesel Engine, 2014, 36(2):19-26.