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气阻装置是实现低真空电子束焊接的重要部件。本文较详细地述叙了低真空电子束焊接机气阻装置的设计与理论计算。为了能从理论上进行计算,本文给出了气阻管上口附近空间的流导公式及采用松驰法计算气阻管的方法,从而改进了以前只作半经验粗略估算的方法,使气阻管的设计完全能从理论上进行计算。上述的设计方法为实验结果所验证。
Air resistance device is to achieve low vacuum electron beam welding an important component. This article describes in more detail the design and theoretical calculation of the air resistance device for low vacuum electron beam welding. In order to be able to calculate theoretically, this paper gives the conductance formula of the space near the upper port of the gas pipe and the method of using the relaxation method to calculate the gas pipe, so as to improve the previous method of rough estimation for only half experience, The design of tube barrier can be theoretically calculated. The above design method is verified by experimental results.