Static disc of low-vacuum vortex pump

The utility model provides a static disc of a low-vacuum vortex pump, which is internally provided with a vortex-shaped compression cavity, an exhaust port, an exhaust passage and an exhaust valve mounting hole, and an exhaust valve is arranged in the exhaust valve mounting hole; the exhaust valve comprises a valve seat, a spring and a sealing piston, the valve seat is connected into the exhaust valve mounting hole in a sealed mode, the sealing piston blocks the exhaust port, a spring sleeving column in a circular truncated cone shape is arranged on the inner side of the valve seat, a conical ring groove is formed in the outer side of the spring sleeving column, a valve rod is arranged on the spring sleeving column, and a guide hole is formed in the sealing piston. One end of the valve rod extends into the guide hole, and a movable space is formed between the end of the valve rod and the bottom end of the guide hole; the spring is sleeved on the valve rod, the spring sleeving column and the sealing piston and