Split type roots pump rotor

The utility model discloses a split type roots pump rotor which comprises a driving shaft and a roots rotor, the roots rotor is a forging part and is hollow, the driving shaft penetrates through the roots rotor, a key groove is formed in the driving shaft, a key is arranged in the key groove, a sealing ring is arranged between the roots rotor and the driving shaft, and a locking nut is arranged on the sealing ring. The Roots rotor and the driving shaft are assembled in a combined mode, integral casting is not needed in the production process, separate production is achieved, and the forged driving shaft is better in mechanical property. 本实用新型公开了一种分体式罗茨泵转子，包括驱动轴和罗茨转子，罗茨转子为锻造件，罗茨转子中空，且驱动轴穿过罗茨转子，驱动轴上设有键槽，键槽内设有键，罗茨转子与驱动轴之间设有密封环，密封环上设有锁紧螺母。通过罗茨转子和驱动轴组合装配，在生产过程中不需要一体铸造，分开进行生产，并且通过锻造的驱动轴力学性能更好。