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    • 63. 发明专利
    • CANNED MOTOR PUMP FOR HIGH MELTING LIQUID
    • JPH02188687A
    • 1990-07-24
    • JP478689
    • 1989-01-13
    • NIKKISO CO LTD
    • KAWAMURA HISAE
    • F04D7/06F04D13/06
    • PURPOSE:To miniaturize a pump device and improve the heat transmissibility with respect to a cooling/lubricating liquid by providing a heating jacket or a heating coil for controlling the melting temperature of the coolinglubricating liquid which is stagnant and solidified in a rotor chamber on the outer peripheral face of a stator can for partitioning the rotor chamber. CONSTITUTION:At the time of restarting the operation of a pump, a heating medium for heating is fed into the heating jackets 60 of a motor portion 10. The quantity of heat for heating is directly transmitted to a solidified liquid which is stagnant in a rotor chamber 16 via a thin metal stater can 14 to melts same rapidly. Accordingly, as the canned motor is driven, the molten liquid is circulated and flows via part of a pump discharged liquid to carry out the cooling/lubrication of a pump 12 and bearings 28, 32. When a liquid temperature should be controlled to be a defined temperature, the control is carried out through the temperature control of the heating medium. At the time of carrying out the liquid temperature control by means of a heating coil, high responsiveness can be obtained. By such a structure, heat transmissibility and temperature control can be improved while reducing the preparation time for the operation of the pump.