Modular construction liquid ring pump, interstage bypass and overload protection

摘要

The present invention relates to a modular liquid ring pump having a liquid ring overload protection system including a passage from a working chamber directly to the pump discharge passage and a mechanical relief valve. configured to release liquid from the work chamber during a compressor overload. The liquid ring pump, when configured to have two stages, has an interstage bypass system that includes an opening in an interstage passage and a pressure sensitive mechanical valve that allows the discharge of a first stage compressor to flow directly to pump discharge at startup or during low pressure operation. Modular liquid ring pump construction can be easily configured from a single stage pump to a two stage pump and vice versa by using the same bearings, head and drive system, and only by changing the body , the cone and the rotor.