Sulzer Pumpen Ag

Sulzer Management Ag

Jorma Tapani Lehtonen

Heikki Manninen

Jussi Ahlroth

The present invention relates to a centrifugal pump, a shaft sleeve and a stationary seal member for a static seal used in connection with a dynamic sealing of a centrifugal pump. The invention relates to a static seal the clearance of which may be adjusted while the pump is running. Especially the invention discusses the novel structure of such a static seal. A characterizing feature of a centrifugal pump comprising a pump housing (), a shaft (), an impeller attached on the shaft, a dynamic sealing () having a sealing chamber () and a repeller () mounted on the shaft (), and a static seal () arranged in a shaft space () behind the dynamic sealing () as seen from the direction of the impeller, said static seal () comprising an axially adjustable seal cover () including a stationary seal member; and a rotary seal member arranged on the shaft (), is that the seal cover () is provided with a flexible seal member (), whose counter member () is arranged in connection with a shaft sleeve () arranged on the shaft ().

Centrifugal pump, a shaft sleeve and a stationary seal member

The present invention relates to a centrifugal pump, a shaft sleeve and a stationary seal member for a static seal used in connection with a dynamic sealing of a centrifugal pump. The invention relates to a static seal the clearance of which may be adjusted while the pump is running. Especially the invention discusses the novel structure of such a static seal. A characterizing feature of a centrifugal pump comprising a pump housing (), a shaft (), an impeller attached on the shaft, a dynamic sealing () having a sealing chamber () and a repeller () mounted on the shaft (), and a static seal () arranged in a shaft space () behind the dynamic sealing () as seen from the direction of the impeller, said static seal (') comprising an axially adjustable seal cover () including a stationary seal member; and a rotary seal member arranged on the shaft (), is that the seal cover () is provided with a flexible seal member (), whose counter member () is arranged in connection with a shaft sleeve () arranged on the shaft ().

The present invention relates to a sealing arrangement for attaching a side plate often used with a pump volute of a centrifugal pump and an attachment screw used therewith. A characterizing feature of the sealing arrangement for attaching the side plate of a centrifugal pump, comprising at least a pump volute () and a side plate () with attachment screws () and flanges () of the screws () arranged in communication with the volute () or the cover of the casing, is that an annular seal () is arranged between the screw () and the volute or the cover of the casing.

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Mänttä, Finland

Jorma Tapani Lehtonen