| 摘要 |
A mechanical assembly e.g. a pump or compressor comprises a stator defining a fluid cavity and a rotor 210 mounted within the cavity. The rotor comprises blades 220a-c which are uneven in number, wherein an outer portion of each blade defines a gap with an element of the stator. At least two of the blades define a gap having a first width R1 and at least one other blade defines a gap having a second width, wherein the first and second widths are different. Alternatively at least three of the blades define gaps of differing widths. The blades may have different extents and may be trimmed or machined from the rotor. In use, the present invention reduces rotational frequency vibrations within the mechanical assembly caused by blades passing a feature such as a volute cutwater. |
