Permanent magnet pump motor
View Patent ↗In a permanent magnet pump motor comprising a stator and a rotor, a permanent magnet is used for the rotor; and the rotor has a shaft end portion to be mounted with a joint shaft for rotor insertion and bearing brackets for housing therein bearings for supporting the both ends of the rotor. The bearing brackets have cavities through which a rotor shaft and the joint shaft can pass.
1. A permanent magnet pump motor comprising:
a stator;
a motor case; and
a rotor, wherein
a permanent magnet is used for the rotor;
the rotor has a shaft with an end portion to be mounted with a joint shaft for rotor insertion and bearing brackets for housing therein bearings for supporting the both ends of the rotor, the bearing brackets having cavities through which a rotor shaft and the joint shaft can pass; and
the motor case has an end portion to be mounted with a jig for supporting the joint shaft for rotor insertion, the jig comprising:
two steel plates; and
a plurality of columns disposed between the two steel plates so as to form a space therebetween, the steel plates having cavities at a center thereof so as to allow the joint shaft to pass therethrough.
2. The permanent magnet pump motor according to claim 1 , wherein:
the end portion of the motor case is mounted with a support bolt for rotor insertion.
3. The permanent magnet pump motor according to claim 2 , wherein:
the end portion of the motor case is a flanged end portion.
4. The permanent magnet pump motor according to claim 1 , wherein:
at least one of the bearing brackets has a cavity formed in a position corresponding to an air gap between the rotor and the stator disposed inside the motor case so as to allow a contact prevention member for preventing the rotor and the stator from contacting each other to be inserted therein.
5. The permanent magnet pump motor according to claim 1 , wherein:
the rotor shaft and the joint shaft have end portions that are threaded to form threaded portions to make a connection therebetween.
6. The permanent magnet pump motor according to claim 1 , wherein:
the bearing brackets are formed of a nonmagnetic material.
7. A permanent magnet pump motor system comprising:
the permanent magnet pump motor according to claim 1 disposed on an LNG plant.
8. The permanent magnet pump motor according to claim 1 , wherein:
the end portion of the motor case is a flanged end portion.