Pump (E) type surface aerator by the motor, transmission and aeration impeller composed of three parts. (1) According to the whole machine installation There are two types of fixed and floating: A, fixed: the machine is fixedly installed in the structure of the upper part, Vertical coaxial arrangement impeller aerator 1 - planetary cycloid reducer; 2 - base; 3 - floating disk coupling; 4 - bearing; 5 - bearings; 6 - drive shaft; Set: The machine is installed on the float, as shown below. It is mainly used for oxidation ponds, oxidation ditches and aeration lakes whose height changes greatly, and can also move horizontally within a certain range according to needs.