| 摘要 |
To minimize the clearances and the spread of the clearances between the interacting rotors in rotating machines of displacement type, working as compressors, expanders, pumps and similar machines, the flanks of at least one of the rotors (22) is in a preparative manufacturing operation given an overdimension (17) by cutting, chemical, electrical or plastic treatment which results in a rotor surface with closely located elevations in shape of ridges (19) or pyramides with a preferred run parallel to the run of the sealing zone between the interacting rotors. By rolling down against a special tool (30) or against the interacting rotor (20) itself, the elevations thereafter are pressed down to a part of their height to the contour (18) which gives the wanted minimized clearance towards the flank surfaces of the interacting rotor. The recesses between the elevations (19) can be filled with ceramic, polymeric or metallic material. At an alternative application on precision gears the clearance between the teeth (15, 16) is reduced in an analog way. |
