Patent ID: 6579080
Filing Date: 2003-06-17
Classification: F01C

Abstract:
A displacement machine for compressible media with two spiral feed chambers which are arranged opposite each other in a fixed housing, and with spiral displacement bodies engaging in these feed chambers, consisting essentially of a central disk and of spiral strips which are attached to each side of the disk and which are held in an eccentric manner in relation to the housing, so that during operation each point on the displacement body executes a circular or elliptical movement, depending on a configuration of a guiding device, said movement being limited by cylinder walls of the feed chamber, and so that a curvature of the strips is dimensioned such that it almost touches inner cylinder walls and outer cylinder walls of the feed chamber on in each case at least one sealing line per strip, said sealing line advancing continuously during operation, and, in order to guide the displacement body in relation to the housing, an eccentric arrangement is provided which essentially consists of a drive shaft and of an eccentric disk arranged thereon,characterized in that one feed chamber is configured for compressing a working substance and the other opposite feed chamber for expanding said working substance, the feed chambers each have an inlet and an outlet, the inlet of any one feed chamber is separate from the outlet of the other opposite feed chamber, the feed chambers and the strips engaging in them consisting essentially of successive circular arc segments, radii of the circular arc segments in the compression-side feed chambers and strips essentially decreasing in size, when viewed in a direction of rotation, and radii of the circular arc segments in the expansion-side feed chambers and strips essentially increasing in size, when viewed in the same direction of rotation.