New rotary valves for pulse-tube refrigerators |
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Authors: | ME Will IA Tanaeva ATAM de Waele |
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Affiliation: | a Department of Physics, Eindhoven University of Technology, PO Box 513, NL-5600 MB Eindhoven, The Netherlands b Sumitomo Heavy Industries, 2-1-1 Yoto-Cho, Nishitokyo-city, Tokyo 188-8585, Japan |
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Abstract: | In most used rotary valves in GM-type pulse-tube refrigerators the rotor makes heavy mechanical contact with the stator, so the valve is liable to wear, and large torques are needed. In this paper we will describe two types of valves, which have balanced forces on the rotor. In the first valve the rotor and the stator make no mechanical contact. The second type is a contact valve, like the classical valves, but the forces on the rotor are balanced in a different way. Therefore, these valves are less liable to wear, and the torques needed to rotate the valves are small. |
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Keywords: | Pulse tubes Cryocoolers Rotary valves |
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