Eccentric spiral pump has stator and rotor which rotates eccentrically to stator, and rotor has less number of teeth than stator, where rotor and stator are partially or completely made of metal or metal alloy

摘要

The eccentric spiral pump has a stator and a rotor (1) which rotates eccentrically to the stator. The rotor has less number of teeth than the stator. The rotor and the stator are partially or completely made of a metal or a metal alloy, where a stator lining is arranged at an area. The stator lining is made of plastic such as glass fiber reinforced polyphenylene sulfide or elastomers, particularly fluoroelastomers.