缝隙间隙密封在阀设计中的运用

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在某型飞机使用的阀中采用了缝隙间隙密封,依据计算、设计和试验阐述了泄漏量与压力、间隙尺寸、粘度及材质的关系。当间隙尺寸确定时,粘度越大,压力越小,材质越硬,则泄漏量越小,即阀在采用缝隙间隙密封时,泄漏量与工作介质的种类有关,每种工作介质粘度不同,泄漏量也不同,阀体材质越密,抗泄漏越好。因此,应尽量选择粘度系数大的介质和材质较密的材料。

The draught sealing is applied to the valve of a certain type of aireraft, based on computation, design and test results, the relations between the leakage and pressure, the leakage and clearance dimension, leakage and viscosity and leakage and material are expounded, i.e. when the clearance dimension is determined, the higher viscosity, the lower the pressure; the harder the material, the less the leakage, that is to say, in case the valve is in adoption of draught sealing, the leakage is related with the category of working medium, the leakage varies with the working medimn, besides, the more dense of material of valve body, the better the leakage resistance. Therefore, when the valve is adopted with draught sealing, it is better to select the working medium of high viscosity coefficient and material with higher density as much as possible.

间隙尺寸，密封，泄漏量，粘度，压力，clearance dimension，sealing，leakage，viscosity，pressure。

缝隙间隙密封在阀设计中的运用。