机械故障仿真试验台实验与应用

齿轮箱系统应用非常广泛,如发生故障将会影响机械的安全运行,也将严重威胁操作人员的安全,因此对齿轮的故障诊断很有必要.对"转子动力学"及"机械的奥秘"课程开设了以旋转设备故障诊断实验内容,利用故障仿真器中各种故障程度齿轮及轴承在不同转速下的数据采集和分析,得到了相关的实验规律.该诊断在验证设备可靠性的同时,为课程的实验教...     

方坯连铸机拉矫机冷却水系统改进

介绍了方坯连铸机拉矫机的作用，以及拉矫机在使用过程中存在的问题，进而提出的改进方式，提高了设备的使用寿命、使用性能，在实践中取得明显效果。     

忽略时间延迟磁浮轴承Jeffcott转子系统平衡点的稳定性

利用常微分方程中的中心流形理论来讨论,磁浮轴承Jeffcott转子系统的平衡点(0,0)的稳定性。     

Experiment and Simulations on Lubrication Performance of EMP Journal Bearing

In recent years, much attention has been devoted to the design and operation of bearings made of elastic metal plastic (EMP). The surface of the bearing bush is covered by a layer of polymer PTFE(polytetrafluoroethylene). The physical performances of the polymer are quite different from that of metal. It can reduce friction because of its lower surface energy, and it is more difficult for the fluid to be adhered. Consequently, the slip will exist at the oil-bush interface. The journal bearings made of this material are researched in this article. Through test, the existence of slip is proven and the equation of the slip velocity for the EMP journal bearing is established when shear stress up to a certain value. Thus, the classical Reynolds equation is modified. The lubrication mechanism is analyzed by some simulation results.     

Theoretical Investigation on a Novel Hydrodynamic Journal Bearing

To improve the static and dynamic performance of hydrodynamic journal beatings, a novel bearing is developed, which is a cone-shaped hydrodynamic bearing with spiral oil wedges. The major structural feature of this bearing is the three spiral circular recesses on the beating‘s surface, leading to improved characteristics. This paper aims to develop a model for design and calculation of the geometric parameters and the oil film thickness, and to provide a theoretical analysis to the static characteristics using a f‘mite element method. Some new features are introduced.     

针织圆纬机大盘齿轮磨损分析

针对国内针织企业使用圆纬机的过程中出现的大盘齿轮失效的问题,经生产实践总结,可知大盘齿轮的失效形式主要有磨损、表面疲劳、塑性变形、齿断裂、气蚀等.大盘齿轮失效的原因主要有材料选择不当、装配精度低、钢丝滚道轴承失效等方面.为解决这些问题带来的影响,设计特种回转支承结构的方案,经试验能够解决大盘齿轮失效的问题.     

一个科技人员的人生博弈——记化纤设备专用轴承专家李国栋

李国栋，1942年出生于江苏南通，1962年南京中专毕业分配到哈尔滨轴承厂军工车间工作。1966年三线建设。随厂军工车间内迁到贵州安顺虹山轴承厂。他从一线当工人开始，历任班长、工段长、技术员、车间主任、分厂厂长、轴承研究所副所长及营销部经理。