Some of the positions of rotor shaft minimize the inter-lobe clearance along the contact line which is in the hermetic segment, therefore they cause rotor interference possibly which lead to rotor abrasion or rotor seizing-up.

• 其中部分位置关系使接触线上密封段的齿间间隙显著减小,从而增加了该种位置关系下转子擦伤、咬死的可能性。