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动静压混合式密封在液氧泵中应用的关键技术研究
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Key Technologies of Dynamichydrostatic Hybrid Seals Used in Liquid Oxygen Pump
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    摘要:

    为解决液氧/煤油火箭发动机液氧泵用端面密封存在的磨损问题,提出采用动静压混合式密封的设计思路,并对关键技术进行研究,给出混合式密封液膜密封和气膜密封的一般选用原则,基于数值计算的方法研究静压结构参数对密封气膜刚度和泄漏率的影响规律。结果表明:随着节流孔直径的增加,密封气膜刚度和泄漏率均增加,通常建议节流孔直径的取值范围为0.2~0.3 mm;当均压槽深度从0.1~0.5 mm变化时,密封气膜刚度和泄漏率均保持不变;随着均压槽宽度的增加,密封气膜刚度降低,泄漏率则呈线性增加,通常建议压槽宽度取值范围为0.3~0.6 mm。

    Abstract:

    The design idea of dynamichydrostatic hybrid seals was put forward to solve the wear problem of the end face seal in liquid oxygen pump of liquid/oxygen kerosene propellant rocket engine.The key technologies of dynamichydrostatic hybrid seals were studied,and the general selection principles of liquid film seal and gas film seal were given.Based on the numerical calculation method,the influences of static pressure structure parameters on the gas film stiffness and leakage rate were researched.Results show that with the increasing of the diameter of restrictive orifice feed hole,the film stiffness and leakage rate of the seal are increased,the recommended range of the diameter of restrictive orifice feed hole is between 0.2 mm and 0.3 mm.When the pressure equalizing groove depth is changed from 0.1 to 0.5 mm,the film stiffness and leakage rate of the seal are both constant.With the increasing of the pressure equalizing groove width,the film stiffness is decreased,and the leakage rate is increased linearly,the recommended range of the pressure equalizing groove width is between 0.3 mm and 0.6 mm.

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赵伟刚,张树强,陈杰,王良.动静压混合式密封在液氧泵中应用的关键技术研究[J].润滑与密封,2017,42(1):111-115.
. Key Technologies of Dynamichydrostatic Hybrid Seals Used in Liquid Oxygen Pump[J]. Lubrication Engineering,2017,42(1):111-115.

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  • 在线发布日期: 2017-03-30
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