QY Submersible Pumps (hereinafter referred to pumps) consist of 3 parts: pumps, seals and motors. At the copper part of motors lie pumps. These pumps have centrifugal axial structures. Motors lie in the lower part of pumps. They are oil-filled three-phase asynchronous motors. Overall contents-sealed boxes are applied to seal pumps and motors “o” type oil and rubber sealing rings are used to seal in each fixed sealing mentioned above