剛体モデルによるスクリュー圧縮機ロータの静的角度伝達誤差の解析

抄録

A numerical method of calculating the static transmission error of screw compressor rotors is presented. Factors such as profile errors, lead errors, bearing position errors, and misalignment of the rotors with respect to the rotational shafts are considered in the calculation. All compressor parts are assumed to be rigid. Clearance between the rotors in the direction of the rotor rotation is calculated from rotor surface displacements, composed of the above individual errors. By tracing the clearance along the theoretical contact line from the suction end to the discharge end, the minimum value is obtained and it is converted to the transmission error. Some numerical examples of the static transmission error, its Fourier-series coefficients, and movement of the rotor contact point are shown for a sample compressor, of which the shaft lines are not parallel to each other and (or) rotor axes are misaligned.