| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric pump for supplying water and oil in a lightweight and inexpensive structure.SOLUTION: A shaft 3 fittedly inserted into a water pump chamber 2a, a motor chamber 2b, and an oil pump chamber is rotatably supported inside a housing 2. A motor 5 for rotating the shaft 3 is stored in the motor chamber 2b. An impeller 4 is fixed to the shaft 3 so as to be rotated together, and stored in the water pump chamber 2a. An inner rotor 6 is fixed to the shaft 3 so as to be rotated together, and stored in the oil pump chamber. In the water pump chamber 2a and the oil pump chamber, maximum values of periodical pressure fluctuations occurring when water and oil are sucked and discharged by the rotating motions of the impeller 4 and the inner rotor 6 are set so as to be displaced from each other. |
