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本文介绍了我们研制的PLHe5250型单阀膨胀机的结构、性能及调试结果。膨胀机的气缸直经为φ52毫米,活塞行程为50毫米,不锈钢短活塞在氮化不锈钢气缸里往复运动的速率为700～800转/分。膨胀机的进排气过程由活塞控制。我们已经向使用单位提供了2台膨胀机,将它们装在CHY20型氦液化器上,其液氦产量大于20升/时。用户提供的使用报告说明,膨胀机设计合理、结构紧凑、工作可靠、性能稳定、操作简便。
This article describes the structure, performance and commissioning results of the PLHe5250 single-valve expander we developed. The expander cylinder straight through φ52 mm, the piston stroke of 50 mm, short stainless steel piston in the nitrided stainless steel cylinder reciprocating speed of 700 to 800 rev / min. Expander intake and exhaust process controlled by the piston. We have already provided 2 units of expanders to the user units, which are mounted on a CHY20 helium liquefier with a liquid helium output of more than 20 l / h. User reports provided by the use of instructions expander designed, compact, reliable, stable performance, easy to operate.