润滑与密封
潤滑與密封
윤활여밀봉
Lubrication Engineering
2015年
9期
63-67
,共5页
微凹槽%机械密封%密封性能
微凹槽%機械密封%密封性能
미요조%궤계밀봉%밀봉성능
micro-grooves%mechanical seal%sealing property
采用FLUENT软件分析微凹槽结构对机械密封性能的影响，探讨凹槽深度比（凹槽深度与油膜厚度比值）、凹槽宽度比（微凹槽宽度与内环圆弧的直线长度比值）和凹槽长度比（微凹槽长度与圆环宽度比值）对开启力、液膜刚度、泄漏率的影响。结果表明：凹槽深度比、凹槽宽度比均存在一个最佳值使开启力和液膜刚度达到最大值，开槽深度与油膜厚度有着密切的关系；在凹槽宽度比一定时，凹槽宽度越大，开启力和液膜刚度也越大，而泄漏率基本保持不变，这表明毫米级宽度凹槽比微米级凹槽具有更好的密封性能；凹槽长度比越大，开启力和液膜刚度也越大，但是泄漏率也会同时增大。
採用FLUENT軟件分析微凹槽結構對機械密封性能的影響，探討凹槽深度比（凹槽深度與油膜厚度比值）、凹槽寬度比（微凹槽寬度與內環圓弧的直線長度比值）和凹槽長度比（微凹槽長度與圓環寬度比值）對開啟力、液膜剛度、洩漏率的影響。結果錶明：凹槽深度比、凹槽寬度比均存在一箇最佳值使開啟力和液膜剛度達到最大值，開槽深度與油膜厚度有著密切的關繫；在凹槽寬度比一定時，凹槽寬度越大，開啟力和液膜剛度也越大，而洩漏率基本保持不變，這錶明毫米級寬度凹槽比微米級凹槽具有更好的密封性能；凹槽長度比越大，開啟力和液膜剛度也越大，但是洩漏率也會同時增大。
채용FLUENT연건분석미요조결구대궤계밀봉성능적영향，탐토요조심도비（요조심도여유막후도비치）、요조관도비（미요조관도여내배원호적직선장도비치）화요조장도비（미요조장도여원배관도비치）대개계력、액막강도、설루솔적영향。결과표명：요조심도비、요조관도비균존재일개최가치사개계력화액막강도체도최대치，개조심도여유막후도유착밀절적관계；재요조관도비일정시，요조관도월대，개계력화액막강도야월대，이설루솔기본보지불변，저표명호미급관도요조비미미급요조구유경호적밀봉성능；요조장도비월대，개계력화액막강도야월대，단시설루솔야회동시증대。
The software FLUENT was used to analyze the effects on sealing performance of mechanical seals textured with micro?grooves. The effects of groove depth ratio ( ratio of the groove length to oil film thickness) , width ratio ( ratio of the groove width to length of inner arc straight line) and length ratio ( ratio of the groove length to the width of cirque) on sealing performance including opening force, leakage and stiffness of fluid film were discussed. The results show that groove depth ratio and width ratio can all be optimized to achieve max opening force and stiffness film, so the groove depth is closely related to film thickness. Under the same width ratio, opening force and film stiffness are increased as groove width and length increasing, while leakage ratio remains unchanged basically, which indicates that groove width of milli?meter scale is better than micrometer scale in sealing performance. The opening force and stiffness of fluid film will in?crease as length ratio increases, however leakage will also increase at the same time.
