ROTOR

摘要

A rotor (2;3) for use in a screw type supercharger or screw type compressor comprises a rotor barrel (8) with a shaft (4) extending axially therethrough, the shaft (4) and barrel (8) being joined by one or more retaining pins (10) driven into one or more transverse blind holes (9) in the rotor (2:3). The or each retaining pin (10) is arranged such that its centre of gravity (G) lies between the shaft axis (4) and the end (9a) of the hole or holes (9) such that, on rotation, centrifugal force urges the pin or pins (10) into the hole or holes (9). A number of pins (10) may be arranged at an angle to one another so that the forces cancel out.