Oil lubricated rotor pump: The mechanical seal is equipped with an oil cup, the main purpose is to optimize the lubrication of the mechanical seal, in order to realize the idling of the mechanical seal in a short period of time and to prevent damage to the mechanical seal caused by the dry grinding of the mechanical seal. The product can also be equipped with thermal insulation jacket, which can be heated by steam or hot water to the pump body, preventing the material from curing in the dynamic and static ring end face and causing damage to the mechanical seal during start-up operation, and realizing the protection of the mechanical seal.