背压下旋转分配器间隙流场特性分析

Analysis for gap flow field characteristics of rotary distributor under back pressure

旋转分配器工作时保持回油通路一定的背压能够提高其使用寿命。本文首先推导出间隙流场中流量、压力、承载能力和油膜刚度的计算公式,得出在增加背压的情况下间隙流场内流体特性的变化,然后运用fluent对间隙流场进行有限元分析,验证了理论公式。在满足旋转分配器工作变载荷的情况下,可以适当增加背压。

Keeping the oil return path of rotary distributor under a certain back pressure can improve the working life. The formula of flow, pressure, loading capacity and oil film stiffness in gap flow field is derived in this pa- per, the variation characteristics of fluid in the gap flow field is obtained when the back pressure increases, and then the finite element analysis of gap flow field is adopted with Fluent to verify the theoretical formula. The con- clusion is that the back pressure can be properly increased while the variable load of rotarv clistrihutnr is ~nti~,~rl