Double-screw hydrogen circulating pump

Abstract

The utility model discloses a double-screw hydrogen circulating pump which is provided with a shell, a double-screw rotor set meshed with each other is installed in the shell, a compression cavity is formed between screw rotors and the shell, the compression cavity is communicated with an exhaust hole, and the exhaust hole is communicated with the shell. The profile curve of the exhaust orifice comprises a first curve AB, a second curve BC and a third curve CA, the first curve AB, the second curve BC and the third curve CA are sequentially connected in an end-to-end mode, the first curve AB is matched with a rotor profile ab of the double-screw rotor set, the exhaust orifice is optimized in design, exhaust flow is improved, and the service life of the exhaust orifice is prolonged. Therefore, the exhaust pulsation and noise level of the whole machine are reduced, and the performance of the hydrogen circulating pump is improved.

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