Ebara Corporation

So Kuroiwa

Masashi Obuchi

Dai Sakihama

Renato Groppo

Fabio Balbo

Mariano Matteazzi

Alessandro Corsini

Giovanni Delibra

Franco Rispoli

Lucio Cardillo

Masaki Watanabe

Shoji Ito

Masakazu Komai

An impeller assembly for centrifugal pumps has two disk members that have different diameters, are arranged coaxially to a rotation axis and face each other so as to form an interspace; blades are radially arranged in the interspace; the two disk members are also centrally provided with a fastening means for fastening to a transmission shaft, which rotates about the rotation axis. The particularity of the present invention resides in having contoured vanes that protrude radially from the peripheral region of the disk member that has the smallest diameter and are arranged substantially at the blades.

Impeller assembly for centrifugal pumps

Impeller for pumps

Impeller for a pump

A motor assembly includes a motor, an inverter for changing rotational speed of the motor, a cooling fan coupled to a rotational shaft of the motor, a guide cover for guiding a gas flow generated by rotation of the cooling fan to the inverter, and at least two support members coupling the inverter to a side surface of the motor. The support members are located on both sides of a center line connecting a central axis of the motor to a center of the inverter as viewed from an axial direction of the motor. A space serving as a passage of the gas flow from the cooling fan is formed between the support members.

Motor assembly and pump apparatus including a cooling fan for cooling an inverter

A pump has an impeller, a casing defining a pump chamber around the impeller for receiving a fluid discharged from the impeller; and, a seal mechanism provided between the impeller and the casing to prevent a fluid from leaking from the pump chamber through an annular space formed between the casing and the impeller. The seal mechanism comprises an annular seal member for blocking the annular space leaving an annular gap between the impeller and the seal member. The annular seal member is movably supported so that the annular seal member is supported in a floating condition in the fluid therearound in operation.

Centrifugal pump having a floating seal ring

Growing community of inventors

Tokyo, Japan

So Kuroiwa