Maag Pump Systems Ag

Maag Pump Systems Textron Ag

Roger Stehr

Peter Blume

Eduard Mischler

Marco Benetti

Urs Boelsterli

Bearing arrangement for a pump shaft of a pump for delivering media of

In order to cool the slide bearing area for the slidable bearing of a gear pump shaft, a slide bearing bush with a slide bearing area and, in the case of the guiding-through of a shaft, a sealing area extends in one piece integrally to the outside, and a cooling-medium guiding system provided in the bush is connected from the outside. This eliminates all sealing problems for the cooling medium feeding to the slide bearing area.

Gear pump channel arrangement for tempering media

A gear pump for conveying fluid media, particularly viscous media, has tube or collar-type sections on the suction side and/or delivery side for connecting the pump in a weldable manner with additional system components.

Gear pump for conveying viscous fluid media and method of making same

A gear pump comprises rotors disposed in roller bearings. For the delivery of very viscous polymer meltings, bearings surfaces of at least one of inner races, outer races of the bearings and bearing surfaces of roller elements are made of a steel with a high-temperature stability. Bearing takes place on material pairings consisting of one of S6-5-2 high-speed steel and silicon nitride Si.sub.3 N.sub.4. The roller bearings are either unlubricated or lubricated by a lubricant remaining in the bearing, preferably a solid-substance lubrication. A distance of supported shafts, from a gearwheel face to a supporting area of the shafts, determined by the outer contact point in the roller bearing, is smaller than twice the median diameter of the shafts therealong.

Gear pump and its uses

To reduce squeeze pressure peaks on meshing rotors of a gear pump, recesses are molded into the product duct wall in the meshing area, on the delivery side and the suction side. The recesses are formed with spherical segments or other continuously curved surfaces.

Gear pump and method of using same

Apparatus and process for handling thermoplastic liquified material is disclosed. A system including an extruder feeding into a degasifying chamber is disposed upstream of a gear pump for pressurizing the material. The extruder gravity delivering, by way of a multiple-billet die, billets to the gears outside of the gear meshing area.

Process and arrangement including a gear pump for handling thermoplastic

A gear pump rotor assembly is disclosed. In order to prevent that the gear toothing is cooled in an unreliable manner, radial heat flow is reduced in the toothing area of the shaft, preferably by means of an insulation air chamber or other insulated section, with respect to the heat flow in other shaft areas to be cooled.

Method for cooling the shaft of a gear pump rotor, a gear pump rotor,

A gear pump comprising a housing for housing gear pump rotors in a housing interior, said housing having a housing end at an end face side of the housing through which at least one pump rotor shaft is guided from the housing interior to outside the housing, a shaft bearing in the housing end for rotatably supporting the rotor shaft, and a labyrinth seal in the housing end which in use surrounds the rotor shaft, wherein the shaft bearing is arranged separately from the labyrinth seal at a position spaced axially inward toward the housing interior with respect to the labyrinth seal.

Growing community of inventors

Bulach, Switzerland

Roger Stehr