Rotor locking structure of roots type compressor

The utility model relates to a rotor locking structure of a roots type compressor. The rotor locking structure comprises a fastener and an adjusting part, wherein the fastener is used for limiting the radial displacement of a rotor; according to the utility model, the rotor is tightly wedged at the shaft end of the rotor shaft through the wedge-shaped sleeve, so that the maximum torque which can be borne by the rotor is improved, the rotor is ensured not to slip during working, and meanwhile, the phenomenon that the rotor slips due to the reduction of the locking force after long-time start and stop and variable-speed working is avoided; meanwhile, the characteristic that the rotor is detachable and replaceable is reserved, and it is guaranteed that the axial position of the rotor can be adjusted through the adjusting gasket. 本实用新型涉及一种罗茨式压缩机的转子锁紧结构，其包括：用于限制转子径向位移的紧固件和调整部；本实用新型在转子轴的轴端端通过楔形套楔紧转子，提高了转子所能承受的最大转矩，保证转子在工作时不打滑，同时避免了长时间启停和变转速工作后，因锁紧力下降而导致的转子打滑；同时保留了转子可拆卸更换的特点，保证了转子可以通过调整垫片调整轴向位置。