Vacuum pump

The invention relates to the technical field of vacuum pump lubricating and cooling, in particular to a vacuum pump. As the runner in the rotor is communicated with the second oil tank, and the oil flinger is mounted on the rotor and located in the first oil tank, when the rotor rotates, the oil flinger rotates, oil in the runner is thrown out through the flow guide cavity, and then oil in the second oil tank continuously enters the runner to be supplemented. Due to the fact that when the oil flinger rotates, the attached oil liquid can be thrown out, meanwhile, the oil liquid in the flow guide cavity can be thrown out, lubricating oil thrown out by the oil flinger is increased, and the lubricating capacity of the vacuum pump is improved. Besides, in the process that the oil thrower throws out the oil in the flow guide cavity, negative pressure can be formed in the flow channel, oil in the second oil tank can continuously enter the flow channel to be supplemented, a system does not need to be additionally arr