ALTERNATING-CURRENT PERMANENT MAGNET DRAINAGE PUMP

摘要

The present invention discloses an alternating-current permanent magnet drainage pump, including a pump cover, a pump body, a magnetic core, a rotating shaft, a stator core and coils. The coils are wound around a coil former, and the stator core is assembled to the coils. The pump body is a shell formed by surrounding a contour of the coils, the coil former, and the stator core which have been assembled to perform a integrated injection molding. The shell defines a magnetic core accommodating space which is used for accommodating the magnetic core and has an opening at a top portion and the magnetic core accommodating space extends from the opening to a center of the pump body. A supporting member is arranged in the opening at the top portion of the magnetic core accommodating space for supporting a bearing of the rotating shaft. The pump body includes a first pump body portion and a second pump body portion. The second pump body portion is provided therein with a cylinder-shaped rotor housing for supporting the rotor assembly, and the magnetic core accommodating space is surrounded and formed by an inner surface of the rotor housing; and a concave arc portion of the stator core is embedded in the rotor housing. The present invention may reduce the magnetic air gap between the stator core and the rotor, improve the operation efficiency of the product, reduce the overall size of the pump body, lower the manufacturing cost of the product, avid resonance and noise generated by the pump body and improve the heat dissipation performance of the pump.

主权项

1. An alternating-current permanent magnet drainage pump with reduced vibration noise, comprising a pump cover and a pump body, and further comprising a magnetic core, a rotating shaft, a U-shaped stator core and coils, wherein the coils wind around a coil former and the stator core is assembled to the coils, wherein
the pump body is a shell body which is formed by conducting an integrated injection molding on a contour of the coils, the coil former and the stator core being assembled together, the shell body is configured to have a magnetic core accommodating space for accommodating the magnetic core which has an opening at its top, and a supporting member is arranged in the opening to support a bearing of the rotating shaft.