摘要
大多数螺旋槽干气密封采用高压密封气体在密封环外侧的泵入式结构。近来,出现了高压气体在密封环内侧的泵出型螺旋槽干气密封,而这类密封常用来密封液体介质。采用Mu ijderman完善的螺旋槽窄槽理论,给出泵出型螺旋槽干气密封端面气膜力的一种近似解析计算方法,给出计算案例,并与泵入型结构进行对比。计算结果表明,同样条件下,泵出型干气密封的端面开启力小于泵入型。
Most of the spiral groove dry gas seals are inward pumping with the sealed high pressure gas being at the outside diameter sides. Recently, the outward pumping spiral groove dry gas seals have come to use with the pressured gas being at the inside diameter sides, but the sealed fluid, common liquid, being at the outside diameter sides of the sealing rings. An approximate analytical method was presented to calculate the gas film pressure between the two seal faces of the spiral groove dry gas seals, which stemmed from the narrow groove theory improved by Muijderman. An example was presented, and compared with corresponding inward pumping one. The calculated results show that the open force of the outward pumping is smaller than that of the corresponding inward pumping structure.
出处
《润滑与密封》
CAS
CSCD
北大核心
2011年第4期1-3,共3页
Lubrication Engineering
基金
国家自然科学基金项目(10962003)
关键词
干气密封
螺旋槽
泵出型
气膜压力
dry gas seal
spiral groove
outward pumping
gas film pressure
