초록

In liquid ring pumps having conical port members, cavitation and associated operating noise are reduced by providing a second subsidiary discharge port beyond the closing edge of the main discharge port in the direction of rotor rotation.

대표청구항 ▼

A liquid ring pump comprising: an annular housing; a rotor rotatably mounted in the housing and having a frusto-conical bore concentric with the rotor axis; and a frusto-conical port member disposed in the bore and fixedly mounted relative to the housing, the port member including (1) an intake port

A liquid ring pump comprising: an annular housing; a rotor rotatably mounted in the housing and having a frusto-conical bore concentric with the rotor axis; and a frusto-conical port member disposed in the bore and fixedly mounted relative to the housing, the port member including (1) an intake port, (2) a first discharge port located beyond the intake port in the direction of rotor rotation and having a closing edge including a segment which is inclined in the direction of rotor rotation from a first relatively large diameter circumference portion of the port member to a second relatively small diameter circumference portion of the port member, the first and second circumference portions being axially spaced from one another along the rotor axis, and (3) a second discharge port spaced from the first discharge port and located beyond the inclined closing edge segment but before the intake port in the direction of rotor rotation, the second discharge port being a longitudinal slot substantially parallel to the inclined closing edge segment.