Vacuum pump

The utility model provides a vacuum pump which comprises a shell, a vacuum pump body and a vacuum pump body. A stator including a plurality of stator blades extending inwardly from the housing; the rotor is located in the shell and comprises a plurality of rotor blades corresponding to the stator blades, and the stator blades and the rotor blades form a gas flow channel; the motor is located in the shell and used for providing power for the rotor, and the part, close to the gas outlet, of the gas flow channel is smaller than the part, close to the gas inlet, of the gas flow channel. According to the vacuum pump, the pumping speed and the compression ratio are met, meanwhile, the weight and the size of the pump are reduced, and the rigidity of the rotor is improved. 本实用新型提供一种真空泵，包括：外壳，所述外壳上设置有进气口和出气口；定子，其包括从所述外壳向内延伸的多个定子叶片；位于所述外壳内部的转子，所述转子包括与所述定子叶片对应设置的多个转子叶片，所述多个定子叶片和所述多个转子叶片构成气体流道；以及位于所述外壳内部用于向所述转子提供动力的电机，其中所述气体流道靠近所述出气口的部分小于靠近所述进气口的部分。本实用新型的真空泵不仅在满足抽速和压缩比的同时降低泵的重量和体积，还增加了转子的刚性。