Sulzer Pumpen Ag

Sulzer Management Ag

Heikki Manninen

Jorma Tapani Lehtonen

Reijo Vesala

Arto Koso

Jussi Ahlroth

Jyri Peuru

Mikko Hirvensalo

An impeller structure for a centrifugal pump that can feed both fibrous suspensions and water into a headbox of a fibrous web machine. The centrifugal pump utilizing the impeller structure pumps stock for both liquid-laid and foam-laid paper, tissue or board making applications and pumps water or other dilution fluid into a headbox circulation. In general, the impeller of the present invention is especially suitable for all such pumping tasks in the production of fibrous webs that a pulseless or low-pulse impeller is needed.

Impeller for a centrifugal headbox feed pump

A mechanical seal includes a pair of slide rings and a spring. Each slide ring has an outer circumferential surface, an inner circumferential surface and slide or seal surfaces at one axial end. Each pair of slide rings has a rotating slide ring and a stationary slide ring, the slide or seal surfaces of each pair of slide rings being in sliding and sealing contact with each other. The inner circumferential surface of one rotating slide ring includes a device to form lock the slide ring, by direct mechanical contact to a hub or a shaft of the flow machine and at least one sealing surface at a side of the device is configured to form lock, each of the slide rings, when assembled to the flow machine supported, in an axial direction by a seal ring to one of the hub and the shaft of the flow machine.

Slide ring, a shaft, a mechanical seal, a housing and a rotor for a flow machine and a flow machine

A rotor structure for a centrifugal flow machine includes working vanes attached to the hub of the rotor without any support disc or shroud. Additionally, the vane has a device for efficiently flushing the sealing chamber behind the rotor.

Rotor for a centrifugal flow machine and a centrifugal flow machine

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 new kind of a mechanical seal, a so called slide ring seal, which is used, for example, for sealing a shaft space of a centrifugal pump in relation to a pumping space thereof. The present invention especially relates both to centering said mechanical seal and/or fastening said mechanical seal to the casing of said centrifugal pump and a body part used for the attachment. A characterizing feature of a mechanical seal in accordance with the present invention, comprising at least one rotary slide ring unit (&#x2033;), a body part by means of which said seal is attached to said casing (), and at least one either separate counter ring unit (') or a counter ring unit (&#x2032;) stationarily attached to said body part, is that said body part (&#x2032;) is provided with inclined fastening means (), by means of which the body part (&#x2032;) is tightened to the casing both axially and radially.

Flow machine, slide ring seal thereof, body part for said slide ring seal and method of fastening said slide ring seal to said flow machine

The present invention relates to a centrifugal pump and an impeller thereof. The present invention especially relates to modifying an impeller of a centrifugal pump in such a way that the pump may be used without a risk of damaging a shaft seal or the like at capacities higher than that at the optimal operating point. A characterizing feature of a centrifugal pump, comprising a pump volute (), a rear wall () of the pump, an impeller () having a shroud () and balancing holes extending through the shroud, the impeller being attached on the pump shaft () and rotating inside the volute (), is that the balancing holes () are arranged through the shroud () in such a way that an opening () of the holes () in the front face of the impeller shroud () is both in the rotational direction and ahead of an opening () located in the rear face of the impeller shroud () and closer to the axis () of the pump than the opening () in the rear face of the impeller shroud ().

Growing community of inventors

Vilppula, Finland

Heikki Manninen