En rullende skovl til bruk i roterende pumper eller motorer som er selvlukkende og med minimalt friksjonstap og som er drevet av en trykkforskjell.

摘要

Referring to fig. 2. A rolling vane to a rotary pump or engine with a self-sealing solution, close to a friction free operation, where the pressure differences between the opposite slopes of the vane-piston (27) in the rotary pump or engine is causing the seal and the movement of the rolling and moving vane element (8) and (5). This solution comprise one freely rolling light and strong cylinder (8), that is rolling between the surface of the working rotor (1) that is rotating centrically inside a cylindrical housing (7) and surface of the reacting rotating cylinder (5) with guiding collars (20) and optional sealing rings (11). The rolling cylinder (8) is sequentially and periodically reciprocating around an axle (4) and at the same time is rolling between the working rotor (1) and reacting rotating cylinder (5). By bearings (19) and the axle (4) the reacting rotating cylinder (5) is kept in position in a matched part of the housing (7) that have radius dimensions close to the radius of the rotating cylinder (5). The radial gap between the housing and rotating cylinder (5) is so little that the space is sealed without material contacts. Optional sealing strips (11) and rings can be used. A cave (9) in the housing (7) that is a part of pressure space (10) of the rotary pump or engine is enabling a passing of the rotating centrically rotor vane-piston (27) through the vane operation space when the rolling cylinder (8) rolls in the cave (9). At any time the rolling cylinder (8) is effectively and continuously sealing the pressure space (10).