水润滑轴承开发及关键技术研究

发布时间：2018-01-12 01:11

本文关键词：水润滑轴承开发及关键技术研究　出处：《河南科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：水润滑轴承以水为润滑介质,在可持续发展、环保和节能等方面发展潜力巨大,尤其是水润滑滑动轴承在船舶艉管、潜水泵等领域应用越来越广泛。而水润滑滚动轴承在新型高速电主轴、核电等工程领域亦具有潜在的应用前景。目前,针对水润滑滚动轴承相关关键技术的研究鲜见报道,水润滑轴承多为传动系统关键重要部件,其运转性能直接影响主机的工作状态,因此,对水润滑轴承设计开发、润滑特性等关键技术进行系统研究势在必行。本课题以某水下送料机构用支承轴承为研究对象,根据轴承的结构特点、工况条件及使用要求,首先对水润滑球轴承结构进行了优化设计及材料选定,在此基础上,建立了水润滑球轴承等温椭圆接触弹流润滑理论分析模型。然后,通过数值计算对比分析了以水或油作为润滑介质时,轴承润滑状态的不同之处,并分析了轴承关键结构参数游隙、轴承转速及内圈沟曲率半径系数对水膜厚度的影响。再次,为提高水润滑球轴承的耐腐蚀性能,制定了表面处理、去氢处理工艺方案,试验表明,经钝化处理的不锈钢套圈,其耐腐蚀性能显著提高,同时有效防止氢脆现象的发生。最后,模拟使用工况,对所开发的水润滑轴承进行了耐磨损性能台架试验,试验验证了磨损是水润滑轴承的主要失效形式,试验后轴承的磨损总量远小于技术指标要求,满足主机对水润滑球轴承的耐磨损性能要求。通过对水润滑轴承的设计开发及关键技术研究工作的开展,掌握了水润滑轴承的设计方法,润滑机理、表面处理等关键技术,对滚动轴承在水润滑领域的应用推广,环保节能,打破国外技术垄断等方面具有重要意义。
[Abstract]:Water lubricated bearing has great potential in sustainable development, environmental protection and energy saving, especially water lubricated sliding bearing in stern tube of ship. Submersible pumps and other fields are more and more widely used, and water lubricated rolling bearings in the new high-speed motorized spindle, nuclear power and other engineering fields also have a potential application prospects. There are few reports on the key technologies of water lubricated rolling bearings. Water lubricated bearings are the key parts of the transmission system, and their running performance directly affects the working state of the main engine. It is imperative to systematically study the key technologies such as the design and development of water lubricated bearings, lubrication characteristics and so on. In this paper, a bearing used for underwater feeding mechanism is taken as the research object, according to the structural characteristics of the bearing. Based on the optimal design and material selection of water lubricated ball bearing, the theoretical analysis model of isothermal elliptical contact elastohydrodynamic lubrication of water lubricated ball bearing is established. The difference of lubricating state of bearings with water or oil as lubricating medium is analyzed by numerical calculation, and the clearance of key structural parameters of bearings is analyzed. Thirdly, in order to improve the corrosion resistance of water lubricated ball bearings, the surface treatment and dehydrogen treatment technology were established. The test results show that the effect of bearing speed and radius coefficient of inner ring curvature on the thickness of water film. The corrosion resistance of the passivated stainless steel ring was improved significantly, and the hydrogen embrittlement phenomenon was effectively prevented. Finally, the wear resistance of the developed water-lubricated bearing was tested on the bench. The results show that wear is the main failure form of water lubricated bearing, and the total wear amount of bearing after test is much less than the requirement of technical index. Through the design and development of water lubricated bearing and the development of key technology research work, the design method and lubrication mechanism of water lubricated bearing are mastered. Surface treatment and other key technologies are of great significance to the application of rolling bearings in the field of water lubrication, environmental protection and energy saving, breaking the monopoly of foreign technology and so on.
【学位授予单位】：河南科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH133.3

【参考文献】