Magnetic drive centrifugal pump having ceramic bearings, ceramic thrust washers, and a water cooling channel

A centrifugal pump, comprising:

• a) a pump volute having a centrally located first shaft hole;
• b) an impeller shaft having an impeller at one end thereof, a first ceramic shaft end extending through the center of the impeller and a second ceramic shaft end extending through the center of the other end thereof;
• c) a drive motor housing having an impeller shaft channel for receiving said impeller shaft, said impeller shaft channel terminating in a second shaft hole;
• d) a first ceramic bearing member being disposed in said first shaft hole;
• e) a second ceramic bearing member being disposed in said second shaft hole,
• f) a first non-circular ceramic washer;
• and
• g) a second non-circular ceramic washer, wherein
• said first ceramic shaft end is rotatably disposed in said first ceramic bearing member,
• said second ceramic shaft end is rotatably disposed in said second ceramic bearing member,
• said first non-circular ceramic washer is mounted in a first non circular recess located between said first ceramic bearing member and said impeller shaft, and
• said second non-circular ceramic washer is mounted in a second non-circular recess located between said second ceramic bearing member and said impeller shaft.

A centrifugal pump, comprising:

• a) a pump volute having a centrally located first shaft hole;
• b) an impeller shaft having an impeller at one end thereof, a first ceramic shaft end extending through the center of the impeller and a second ceramic shaft end extending through the center of the other end thereof;
• c) a drive motor housing having an impeller shaft channel for receiving said impeller shaft, said impeller shaft channel terminating in a second shaft hole;
• d) a first ceramic bearing member being disposed in said first shaft hole;
• e) a second ceramic bearing member being disposed in said second shaft hole, wherein
• said drive motor housing has a fluid pathway surrounding said impeller shaft channel for circulating cooling fluid.