| 主权项 |
1. An electric pump configured to pressurize and discharge fluid, the electric pump comprising:
a casing including an intake opening and a discharging opening, and defining a storage space including a pump chamber and a motor chamber, the pump chamber communicating with the intake opening and the discharging opening, and the motor chamber communicating with the pump chamber; a stator attached to the casing; a shaft disposed in the storage space; and a rotor disposed in the storage space and attached rotatably to the shaft, wherein the rotor comprises:
a body including an inner circumferential surface encircling the shaft; anda magnet located in the motor chamber, and arranged so as to be (i) separated from an outer circumferential surface of the body with an interval in between and(ii) separated from the stator with an interval in between,
the interval between the magnet and the outer circumferential surface of the body communicates the motor chamber and a low pressure area of the pump chamber, the body includes a groove extending from a motor chamber side end of the inner circumferential surface of the body to the pump chamber along the shaft, and the rotor further comprises a wall disposed in the interval between the magnet and the outer circumferential surface of the body and at a position that is different from the groove in a rotation direction of the rotor, and extending from a motor chamber side end of the outer circumferential surface of the body toward the pump chamber. |
