Zahnraderfabrik Renk Ag

Renk Tack Gmbh

Erich John

Erich Pollak-Banda

Wilhelm Schaefer

Albert Oesterle

Two propeller shafts are disposed coaxially one within another. A collar of the inner propeller shaft grips into the hollow outer propeller and supports the inner shaft axially over axial friction bearing elements. The axial friction bearing elements are surrounded by a shaft connecting piece, which is divided in the axial direction and at least one half of which can be removed radially, in order to create access to the axial friction bearing elements. By way of the axial friction bearing elements, axial forces of the inner propeller shaft reach the hollow outer propeller shaft and, from the latter, by way of further axial friction bearing elements, further reach a bearing housing, which is preferably also divided in the longitudinal direction.

Thrust bearing system for counter-rotating propeller shafts,

The invention relates to a hydrodynamic bearing assembly in which a relatively broad bearing is divided into two bearings (2, 3) placed axially side by side. Both bearings are connected together to an inner bearing member (1) which is mounted to swivel universally over a spherical sector surface (16) in a cylindrical bore (18) of a surrounding housing. Between the bearing surfaces of both bearings (2, 3) there is provided in the bearing bore (6) a flowing fluid medium passage shared by the bearings, such as an annular groove (10). Through this passage the outlet flow area for the flowing fluid medium is doubled and length of the flow path in the bearing bore (6) reduced by one-half. Concurrently, a more perfect load pressure equalization is achieved on both bearings (2, 3) owing to the ball-joint-type universal bearing arrangement between the inner bearing member (1) and the housing (20).

Hydrodynamic bearing assembly

An axial thrust compensation system in high speed helical gear engagement includes a thrust collar fixed to a shaft which carries a gear. The collar includes a peripheral groove. Another gear carrying shaft includes a disc element which engages the thrust collar groove. Axial thrust generated in the respective gears and the shafts due to the driving engagement between the gears will be transferred between the shafts by the collar and disc. In one embodiment, the collar and/or disc is formed in one piece with its shaft, while in another embodiment the collar and/or disc is bolted to its shaft. A further embodiment provides a pair of disc shaped collars spaced from opposite sides of one gear with the collars framing a pair of disc elements fixed to the other shaft.

Axial thrust compensation system

A gear drive with single-helix gears in which a pair of such gears mesh with each other and are formed along the length thereof with one or more grooves of a depth equal to or not substantially greater than the tooth height and provided with lubricant-stripping means, e.g. deflectors, to remove the lubricant which passes into these grooves. The grooves of the two gears are aligned in planes perpendicular to the axes of the gears.

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Augsburg, Germany

Erich John