Pump unit and method for operating a pump unit

Details Pump unit and method for operating a pump unit Pump unit and method for operating a pump unit

2007-09-04

2007-09-04

Freay, Charles (Department: 3746)

Pumps

Processes

C310S086000, C310S087000, C417S423130

Reexamination Certificate

active

10450772

ABSTRACT:
The method is provided for operating a pump unit with a centrifugal pump which is driven by an electric motor and which comprises a rotor running in a split tube. The rotor space is separated with respect to the stator in a fluid-tight manner. On running the motor to its operational rotational speed the fluid located in the rotor space due to the increasing rotational speed evaporates and is removed so that the motor finally functions as a dry-runner.

REFERENCES:
patent: 3075104 (1963-01-01), Willyoung et al.
patent: 3135884 (1964-06-01), Luenberger
patent: 3495537 (1970-02-01), Archibald
patent: 3744935 (1973-07-01), Magni
patent: 5144177 (1992-09-01), Rupprecht
patent: 6140725 (2000-10-01), Jensen et al.

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