摘要 |
<P>PROBLEM TO BE SOLVED: To provide a structure by which the shaft 35 of the motor 3 can be shortened by chemical simplifying the installing structure of the circulation impeller 7, in the cooling liquid circulation structure of the pump 1 having the circulation impeller 7 for the circulation of the cooling liquid for cooling the motor 3. <P>SOLUTION: The cooling liquid circulation structure of the pump includes at least rotation rings 52, 54, fixed rings 51, 55, and the compression spring 53, and has the mechanical seal 5 sealing the shaft 35 between the pump part 21 and the motor part 22, and the circulation impeller 7 arranged in the shaft 35 and circulating the cooling liquid in the cooling liquid circulation flowing passage by rotating along with the shaft 35. The circulation impeller 7 is fixed to the shaft 35 so as to rotate along with the shaft 35 by the biasing force of the compression spring 53 of the mechanical seal 5. <P>COPYRIGHT: (C)2012,JPO&INPIT |