－17－
5.Operation
5.1
Structure of pump
This pump has three special features.
(1). DC brushless motor
⑩
Can run it with the rotating speed that is the optimum which accepted
load of a pump by using this motor, and can pump it from atmospheric
pressure.
(2). Magnet coupling
⑫
Arrange inner side magnets and outside magnets in the shape of coaxial
including a can shield of nonmagnetic material.
Transmit power of a
motor to a pump using this magnetic field.
(3). Clearance seal
⑨
Tend to use oil seal for shaft seal between rotor chamber and a bearing
chamber.
Here, use a clearance seal of non-contact of a small
conductance in substitution for oil seal.
Because power loss is a zero, can
realize power saving operation for the seal which does not have the
contact area.
Fig.13 Structure of pump
