HYDRAULIC PISTON ENGINE

摘要

A hydraulic piston engine (1) driven by a lubricant-free, water-based pressure fluid, and comprising an enclosing housing (2) and a piston-connected drive shaft (6) supported by radial journal bearings in bearing bushings (9). One of the sliding surfaces (8) of the radial journal bearing comprises a recess (11) with a bearing-supporting hydrostatic pressure fluid pocket. The centre of the recess (11) is displaced by an angle ( alpha ) in the direction against the direction of rotation of the drive shaft (6), seen in relation to the geometrical, radial mean point in the high-load area for transmission of the piston forces to the bearing surface (8) via the drive shaft (6). Hereby a particularly reliable piston motor of the type indicated is provided.