| 摘要 |
PURPOSE: A transformer cooling circulation pump is provided to achieve an improved efficiency of the pump by arranging an insulation oil outlet port at the opposite side of the inlet port such that all of the insulation oil introduced through the inlet port by the rotation of the impeller passes through the motor unit. CONSTITUTION: A fixing unit is installed within a motor casing(4), and the fixing unit includes a stator(6) and a rotor(7) supported at a rotation shaft(8). A rotation shaft(8) has an impeller(9). A pump casing(11) having an insulation oil inlet port(12) and an insulation oil outlet port(10), is arranged at a portion of the motor casing. The insulation oil inlet port is formed at the motor casing side, and the insulation oil outlet port is formed at the upper portion of the pump casing side which is opposite to the oil inlet port. The insulation oil inlet port and outlet port have the same diameter, and the distance between two ports and the size of the motor casing are constant. The motor casing has at an inner periphery thereof casing flow channels(4a,4b,4c,4d) shaped as an arc. A plurality of supporting arms(13) are formed integrally with the motor casing, and a shaft support(14) having a shaft supporting bearing(16) is arranged at the center of the motor casing.
|
