Abstract: A connection device for an exhaust gas turbocharger has an essentially bent first element and an essentially bent second element. The first element and the second element are detachably connected with each other in a first end region or in a second end region, respectively, and are movably connected with each other in a third end region or in a fourth end region, respectively. A first supporting portion extends between the first end region and the third end region and a second supporting portion extends between the second end region and the fourth end region. The connection device comprises a recess which is formed in the element for the reduction of stresses.

Abstract: A rotor disk for an exhaust turbocharger is mounted in a housing of the exhaust turbocharger so as to be able to rotate about an axis of rotation. The rotor disk has a disk hub including a disk back and a disk front facing away from the disk back. A plurality of rotor disk blades are formed on the disk hub in a manner extending between the disk back and the disk front. A balancing mark is arranged in a blade channel formed between a first blade of the plurality of rotor disk blades and a second blade, arranged adjacent to the first blade, of the plurality of rotor disk blades. The balancing mark is triangle-like. The disclosure also relates to an exhaust turbocharger comprising such a rotor disk and to a method for balancing a rotor assembly for such an exhaust turbocharger.

Abstract: In an impeller for a fluid energy machine with a hub and a plurality of rotor blades which are mounted on the hub and around which a medium may flow through the fluid energy machine and which form a blade duct between two neighboring rotor blades with a blade duct length which extends in the axial direction of the impeller, wherein each rotor blade is connected to the hub via a first transition region with a first curvature and via a second transition region with a second curvature and with a straight conical blade duct bottom of the blade duct formed between the first transition region and the second transition region.

Abstract: In an exhaust gas turbocharger with a casing part in which a guide apparatus comprising two axially spaced insert elements forming a flow duct is arranged with guide vanes supported on at least one of the insert elements via which exhaust gas flowing through the flow duct is guided into the turbine of the turbocharger and wherein a first of the insert elements comprises a first wall portion which extends at least essentially in the radial direction and an adjoining second wall portion which extends essentially in the axial direction so as to form a corner area of the first insert element, wherein in the first wall portion and/or in the corner area in a side facing the casing part at least one recess is provided.

Abstract: A structure insulated for example by expanded polyurethane or the like, such as a refrigerator cabinet or freezer cabinet, comprises a plurality of compartments separated from each other by an interspace, the insulating material injected into said structure enclosing said compartments on all sides except the access side and positioning itself in the interspace. At opposing ends of said interspace there are positioned separator means openable in the manner of an envelope and arranged to separate, during its injection into the structure, the insulating material directed around the compartments from that directed into the interspace, said separator means comprising a flat portion parallel to the sides of the insulated structure.