Shinmaywa Industries, Ltd.

Arata Funasaka

Akihiro Ando

Junya Enomoto

Yasuyuki Nishi

Terumasa Okizoe

Yasuhide Okazaki

Kazuki Takeuchi

Motonobu Tarui

Nobukazu Tanaka

Seiji Kawaguchi

Satoshi Mashita

Chikara Takebe

Koichi Tamura

Yoichi Tamaki

An example impeller includes: an impeller body in which an internal channel is formed, the internal channel extending inside the impeller body in a direction of a rotation axis spirally about the rotation axis to connect an inlet and an outlet; and at least one centrifugal vane provided in the impeller body. The internal channel including the inlet and the outlet has a predetermined passage diameter. An external channel is formed so as to continue to the outlet and go around the circumferential surface of the impeller body, the external channel being defined by the centrifugal vane and being recessed inward in the radial direction from the circumferential surface of the impeller body. At least a part in a flow direction of the external channel has a channel width in the direction of the rotation axis smaller than the width of the outlet.

Impeller and centrifugal pump including the same

In an impeller, an inlet portion and an outlet portion are provided at one end side and the other end side in the axial direction, respectively. An inletis formed in the lower part of the inlet portion, and an outlet is formed in the side face of the outlet portion. The inlet portion and the outlet portion are partitioned by a flange portion. The impeller 11 includes a primary vaneand a secondary vane. The primary vanedefines a spiral primary channelthat connects the inletand the outlet. The secondary vaneis formed in a shape that a part of the outer periphery of the outlet portion is gouged inward so as to define a secondary channelconnected to the primary channeland extending circumferentially around the outer periphery.

Impeller and sewage treatment pump including the same

Pump impeller

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Hyogo, Japan

Arata Funasaka