DRYING DEVICE FOR ELECTRIC MOTORS OF EXPLOSION-PROOF TYPE

摘要

An explosion-proof canned electric motor for use at elevated temperatures wherein the upper portion of the motor housing contains the stator windings and the rotor and is connected with a terminal box by means of a tubular heat barrier. The terminal box is disposed at a level below the upper housing portion and has an annular venting orifice in the lowermost part thereof so that condensate which accumulates in the housing flows toward the orifice. Such condensate is absorbed by a cake of diatomaceous earth or another suitable porous desiccant which is placed into the path of condensate flow toward the orifice. The desiccant also removes moisture from air which flows into the terminal box, and the desiccant is relieved of accumulated moisture during starting of the motor when the air in the housing expands as a result of heating and flows through the pores of the desiccant on its way into the orifice.