TWO-COMPONENT IMPELLER WHEEL

摘要

The invention relates to a two-component impeller wheel (4; 14; 24; 34; 44; 54; 64; 74; 84). The impeller wheel has a hub (5; 15; 25; 35; 45; 55; 65; 75; 85) which is provided with a coupling device (8; 18; 28; 38; 48; 58) for coupling the hub to the rotor of a drive motor. At least one first impeller-wheel region (1, 1'; 11; 21; 31; 41, 41'; 51; 61; 71, 71'; 81) is configured with a first material component, whereas at least one second impeller-wheel region (2; 12; 22; 32; 42; 52; 62; 72; 82) is configured with a second material component. Here, the first and the second material component have different specific acoustic impedances. The first and the second impeller-wheel region are extruded in one piece with one another. At least one sharp boundary surface (3, 3'; 13, 13'; 23, 23'; 33; 43, 43'; 53; 63, 63'; 73, 73'; 83) is provided between the first and the second impeller-wheel region. Solid-borne vibrations which are introduced via the coupling device are reflected at least partially at the boundary surface. Solid-borne vibrations which propagate into the two-component impeller wheel (4; 14; 24; 34; 44; 54; 64; 74; 84) are advantageously reduced as a result in the impeller wheel according to the invention.