TW200636163A - Canned pump - Google Patents

Abstract

This invention is provided with a canned pump, which can prevent the bearing part of the impeller spindle from damage, also restrict abrasion of the bearing part, even when it is run in a dry operation status temporarily, or the operation liquid is in a gas-liquid mixed status, this invention results in superior of durability and decreased maintain cost. A cylindrical body 4A is provided integrally with a driving shaft 3A with a driving magnet M1 disposed on the inner periphery side of the cylindrical body 4A, the driving magnet M1 being diposed on the outer periphery side of a cylidrical-shaped can 2A with bottom settling on the pumpcasing 1A. A rotor 6A is diposed on the inner side of the can 2A, which is inset in the impeller spindle 5A concentrically, and a driven magnet M2 is diposed on its outer periphery of the can 2A. By the magnetic attraction force between the driving magenet M1 and driven magenet M2, and the revolution of driving shaft 3A, the rotor 6A of the magnetpump runs around the center anis of the impeller shaft 5A and with impeller 7A. The magnet pump makes use of ceramic with diamondlike carbon film or super hard material on the sliding contact face, as the sliding contact elements bush 81, sleeve 82, thrustring 83 lie between the bearing part 8fA, 8rF of the impeller shaft 5A.