Rotary pump with rotor bearing cap
AssigneeUnibloc Hygienic Technologies US, LLC
InventorsCarl Magnus Danielsson, James Richard Howell, James Kyle Lovett
Life of this patent
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Abstract
Lobe pumps have bearing discs or caps which can be located at least partially in at least one of cover plates and rotors, if not both to provide at least thrust bearings to space the rotors from the cover plates while facilitating the possibility of clean in place operations. Many embodiments have bearing discs on the rotors which do not restrict axial movement on the shaft, but prevent pumped material from contacting the shaft, and many embodiments have bearing discs friction fit in bearing cutouts and bores (through the rotor and/or cover plate) to facilitate removal when disassembled.
Claims20
A rotary lobe pump comprising:
- a rotor housing assisting defining a pump cavity intermediate side walls, an end wall and a cover plate;
- parallel first and second shafts extend into the cavity from the end wall;
- an inlet port and an outlet port communicating with the cavity;
- first and second rotors connected to the first and second shafts, respectively;
- each of the first and second rotors having ears with faces directed toward the cover plate connected respectively to central hubs with the hubs connected to the respective first and second shafts, and hub cavities extending respectively from ends of the first and second shafts to ends of the hubs;
- and
- first bearing discs located at least partially in the hub cavities sealing off the hub cavities from the pump cavity from fluid communication while the first bearing discs do not restrict axial movement of the first and second rotors along axes of rotation of the first and second shafts.
A rotary lobe pump comprising:
- a rotor housing assisting defining a pump cavity intermediate side walls, an end wall and a cover plate;
- parallel first and second shafts extend into the pump cavity from the end wall;
- an inlet port and an outlet port communicating with the cavity;
- first and second rotors connected to the first and second shafts, respectively;
- each of the first and second rotors having ears with faces directed toward the cover plate connected to a central hub with;
- and
- second bearing discs are at least partially located within bearing disc cutouts in the cover plate, said second bearing discs friction fit within bearing disc cutouts in the cover plate and further comprising bores extending through the cover plate internal to a perimeter of the second bearing discs whereby a key is directed through the bores to push the second bearing discs out of the bearing disc cutouts to overcome the friction fit when the cover plate is removed from the pump.
Dependencies are inferred from the claim text.