First, the internal surface of the pump and the pressure chamber (also known as the volute) inner surface corrosion uneven. Surface rust will reduce the pump water 7% -8%; maintenance only need to use steel brush and iron sandpaper or grinding wheel smooth, you can make it in the work of the fuel consumption or power consumption reduced by 9% -14%.
Second, the seal ring gap increases. According to the test, when the impeller radius in the direction of the gap increased by 4 mm, the pump will be reduced by 10%; maintenance only need to use organic adhesive plus asbestos to restore the provisions of the gap, you can make the pump at work fuel consumption or Power consumption by 10% -12%.
Third, the pressure chamber and the impeller axis does not coincide. According to the test, when the pressure chamber and the impeller axis deviation of 2 mm or skew angle greater than 2 degrees, the pump water will be reduced by 5% -6%; maintenance, just careful measurement, carefully identify the axis coincidence position, You can make the pump at work when the oil or power consumption reduced by 6% -7%.
Fourth, the blade installation angle is inconsistent. When the blade installation angle is inconsistent, the pump will be reduced by 5%; maintenance, the use of angle scale, the installation of fixed position, you can make the pump at work fuel consumption or power consumption reduced by 5% -6%.
