Patent ID: 8740575

Claim:
A liquid ring pump comprising: an annular housing forming a housing cavity, said housing cavity configured to be filled with an operating liquid during operation of said pump, said operating liquid adapted to form a liquid ring in said annular housing during operation of said pump, said annular housing comprises an annular segment and a closed end extending radially inward from a first end of said annular segment, said annular housing has an open end formed at a second end of said annular segment, said open end is opposite said closed end; a port plate covers said open end of said annular housing, said port plate has an inlet port and an outlet port; a rotor disposed in said housing cavity, said rotor comprising a plurality of rotor blades; each rotor blade having a free end extending in the axial direction relative to a shaft; said shaft extending into said annular housing into said housing cavity through a bore in said closed end of said annular housing, said plurality of rotor blades extending radially outward from said shaft toward said annular housing; and an annular liner formed from a corrosion resistant material is disposed substantially flush with at least a portion of an inner surface of said annular housing, said annular liner comprises an annular sleeve section and a closed end extending radially inward from a first end of said annular sleeve, and said closed end of said annular liner disposed substantially flush with said closed end of said annular housing, said annular sleeve of said liner disposed substantially flush with said annular segment of said annular housing, said closed end of said annular liner has a bore, said shaft extending through said annular housing bore and said bore in said closed end of said annular liner; a first flange extends from a second end of said annular sleeve, said second end of said annular sleeve is at an open end of said liner, said first flange overlaps the second end of said annular segment of said housing, the first flange is coupled between the annular housing and the port plate, wherein the first flange is configured to facilitate coupling of the liner to the housing and to aid in sealing the housing from the operating liquid, said open end of said housing and said port plate are oppositely facing and exert opposing forces on said overlapping portion of said first flange; a second flange forming a part of said liner and extending around said liner bore, said second flange extending into said housing bore; and wherein said annular liner is fixedly coupled to said annular housing of said liquid ring pump, said coupling preventing rotation of said liner relative to said annular housing during operation of said pump.