Canned motor pump
First Claim
Patent Images
1. A canned motor pump comprising:
- a pump for pumping an easily polymerized liquid;
a pump motor comprising a stator, an enclosing casing within said stator and a rotor within said enclosing casing, said rotor including a shaft having supported portions,wherein said pump motor is so configured that the easily polymerized liquid flows within said enclosing casing and into contact with said supported portions, andwherein said supported portions comprise composite electropolished elements having a surface roughness no higher than about 0.5 μ
m Rmax.
3 Assignments
0 Petitions
Accused Products
Abstract
A canned motor pump having an enclosing casing on the inside of a stator and a rotor on the inside of the enclosing casing, in which the interior parts of the enclosing casing communicates with the interior parts of a pump. Surfaces of supported portions on a shaft of the rotor which are contacted with the liquid flowing on the inside of the enclosing casing are treated by electrolytic polishing so that a liquid liable to polymerization or an adherent liquid can normally circulate as a circulating liquid for cooling a motor, and furthermore supporting portions which support the shaft contain bearings produced from fluororesin or glass-fiber reinforced fluororesin.
67 Citations
5 Claims
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1. A canned motor pump comprising:
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a pump for pumping an easily polymerized liquid; a pump motor comprising a stator, an enclosing casing within said stator and a rotor within said enclosing casing, said rotor including a shaft having supported portions, wherein said pump motor is so configured that the easily polymerized liquid flows within said enclosing casing and into contact with said supported portions, and wherein said supported portions comprise composite electropolished elements having a surface roughness no higher than about 0.5 μ
m Rmax. - View Dependent Claims (2, 3, 4, 5)
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Specification