Velcora Holding Ab

Roplan International Ab

Roplan Holding Ab

Henrik Nedlich

Rifet Mehmedovic

Pedram Azadrad

Poul Anton Daugaard

Jesper Raabjerg Jensen

Daugaard Poul Anton Anton

A pump housing device for a fluid pump comprises a rear wall element comprising a rear surface turned towards an impeller. The rear wall element comprises an opening defining a cylindrical surface along a longitudinal central axis. The opening receives a rotating drive shaft of the impeller. A static seal element has a plane seal surface that seals against a plane seal surface of a rotary seal element mounted to the drive shaft and rotating with the drive shaft. The plane seal surface of the static seal element is turned away from the rear surface. One or more grooves extend through the rear wall element and through the rear surface and the cylindrical surface. Each groove has a bottom line that extends from the rear surface to the cylindrical surface.

Pump housing device for a fluid pump, and a fluid pump

The claimed invention concerns a holding device for application of a sealing member () on a shaft (). The holding device () includes a connecting mechanism () adapted to connect the sealing member () on the shaft (). The connecting mechanism includes an annular body () that comprises an inner surface () which, in an axial direction, is arranged at gradually decreasing radial distance from the shaft (). The connecting mechanism comprises at least a clamping element () arranged in a space between the inner surface () of the annular body and the shaft (), and a displacement mechanism () adapted to displace the clamping member in said axial direction relative to the annular body () to a position in which the inner surface () of the annular body presses the clamping element to the shaft. The claimed invention also relates to a mechanical sealing device including such a holding device and a hydrodynamic machine having such a mechanical sealing device for applying a sealing member on a shaft.

Holding device for application of a sealing element on a shaft

A mechanical sealing device and a pump including a mechanical sealing device are described. The sealing device includes a first seal element () and a first holder element () holding the first seal element. The first seal element () forms a first seal surface (), an opposite backing surface () and an outer peripheral surface (). The first holder element has a support surface () and an inner surface (). A second seal element (), forming a second seal surface (), is rotatable in relation to the first seal element around an axis (x) of rotation so that the first seal surface () abuts sealingly the second seal surface () in a radial plane. An elastomer element () is provided between the outer peripheral surface () and the inner surface. The opposite backing surface abuts tightly the support surface.

Mechanical sealing device, and a pump

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Sundbyberg, Sweden

Henrik Nedlich