冲击载荷条件下线接触往复运动的弹流润滑特性
- 文件大小:333.64KB
- 浏览次数:
- 发布时间:2014-03-14
本资料包含pdf文件1个,下载需要1积分
At considering impulse load in the mechanical system in practical engineering, the thermal elastohydrodynam- ic lubrication(EHL) in line contact under reciprocating motion was investigated,under the impulse loading conditions of steady state, sine wave and triangle wave. The influence of different stoke lengths on the oil film characteristics under sine wave impulse loading was investigated. The results show that the influence of the impulse load on the oil film pressure, film thickness and the temperature rise is obvious. Along with increasing of loading, the oil film pressure is increased with low- ering of its thickness and rising of temperature. Under the same loading condition, with more longer of stroke lengths, the greater is the entrainment velocity at same moments in one cycle, so oil film thickness is thicker, the temperature rise is more obvious, and the friction coefficient is reduced obviously.考虑到在工程实际中机械要素常受到冲击载荷的作用,研究在稳态加载、正弦波加载及三角波加载条件下线接触往复运动工况的热弹性流体动力润滑特性,并探讨在正弦波加载方式下,不同的冲程长度对热弹性流体动力润滑特性的影响。结果表明:冲击加载条件对油膜的压力、膜厚、温度都有较大的影响,随着载荷的增加,油膜中压力增大,膜厚降低,温度升高;在相同的加载方式下,冲程长度越长,一个周期相同瞬时的卷吸速度就越大,因此油膜厚度越厚,温升也越明显,而摩擦因数则明显降低。
- 1办公大楼全套cad建筑图纸
- 2电气、电信施工方案
- 3沥青砼路面机械摊铺工艺
- 4威盛大厦施工组织设计上(第一章至第六章)
- 5T/CHEAA 0011.4-2020 家用电器安全使用年限 第4部分:家用燃气灶
- 6SN/T 4784-2017 出口食品中诺如病毒和甲肝病毒检测方法 实时RT-PCR方法
- 7预算员必知包干单价(从基础主体)
- 8EXCEL算量应用高手技能文件(很好)
- 9PK环链葫芦全套图纸
- 10洞门模板
- 11防雷相关知识
- 12房地产开发经营课程设计
- 13GB/T 6657-1986 助听器电声特性的测量方法
- 14轴流风机动静离散噪声预测方法
- 15QB/T 1758-2000 电池贴标机