摘要
建立了矩形截面叶片密封的数值模型,分析了预压缩量、密封油压等对密封表面接触压力和机械效率的影响。结果表明,叶片密封在径向区的压力分布为非线性曲线分布;密封可靠性和密封面机械效率不仅与预压缩量密切相关,还取决于密封油压。同样预压缩量下,密封油压较低时,密封可靠性更容易保证,但摩擦导致的机械效率损失也会相对较多;密封油压较高时,密封可靠性会有所降低,但摩擦对机械效率的影响也会有所减小。
A numerical model was established to study the effects of the initial interference and the seal pressure on the contact pressure and the mechanical efficiency of flexible rectangular section seals for vane. The computing results show that the curves of the contact pressure are nonlinear, the seal reliability and the mechanical efficiency are decided by the initial interference and the seal pressure. With the same initial interference, a vane seal can be reliable under a lower seal pressure, although with a lower mechanical efficiency. When the seal pressure is higher, seal failure can occur at some seal surface. So it may be necessary to modify the initial interference when the seal pressure changes.
出处
《润滑与密封》
CAS
CSCD
北大核心
2009年第7期54-57,共4页
Lubrication Engineering
基金
武汉科技大学冶金装备及其控制教育部重点实验室开放基金资助项目(2009A06)
关键词
矩形截面叶片密封
泄漏
接触压力
机械效率
rectangular vane seal
leakage
contact pressure
mechanical efficiency
