It has a water pump impeller diameter of 40 cm rated speed of 1450r 30KW power flow of 650 cubic lift 4M motor is broken but now want to re allocation of motor speed of the impeller 1430 power is only 15KW 40 cm may bring up I would like to ask the big diameter obtained?How much is the radius of the runner not overloaded? Lift only 1.5~2 meters
This pump is the theory of the total lift is more than 90 meters, more than 4 meters?Motor speed change little, ignore.The power of the pump is roughly proportional to the square of the line speed of the outer edge of the impeller, and is proportional to the diameter of the impeller as well as the Ping Fangcheng.
When the motor power is reduced by half, the impeller will not overload when the diameter of the impeller is changed from 40 cm to 28 cm.At this point, the flow and lift may be greatly reduced, because the impeller and volute serious discrepancies, resulting in a serious reduction in efficiency.
In fact, do not change the impeller. Change the belt pulley, make the pump speed between 1000-1030 rpm, the motor is not overloaded.Non professionals, no professional basis for reference.
