Pump with an elastic sleeve pin coupling: ① the elastic sleeve pin coupling with rubber ring stud sets, flexibility and the ability to compensate for axial displacement, but the relative angular displacement is large, easy to wear; ② simple structure easy to install, easy to replace, small size, light weight, transmission torque, widely used in various rotary pumps; ③ Permissible relative radial displacement 0.14-0.2mm; allowable relative angular displacement 0 degrees 40 minutes; ④ two axis of relative displacement produce additional radial load (0.1-0.3) P; ⑤ pump industry standard for Bll01, its maximum allowable torque 8316N m, maximum shaft diameter of 200mm pumps elastic sleeve pin?. One end of the coupling sleeve and elastic sleeve use (rubber material) studs, installed in two and a half coupling flange edge of the hole in order to achieve the coupling of two coupling halves. Since the elastic sleeve pin coupling selection is made of cast iron, which weighs 38.8 kg, the motor wasted a lot of energy in the water during operation, affecting the unit efficiency, increased operating costs