First, water pump surface pigeonhole hydroecium interior corrosion not smooth surface. Surface corrosion unsmooth to will make pump water yield reduce 7%-8%; Is it brush with iron abrasive paper or emery wheel polishing with steel smooth to need only when overhauling , can make it in work oil consumption or cable when dawdle and reduce by 9%-14%.
Second, the sealed ring interval increases. According to examining trying, when in the direction interval of radius of the impeller increases 4 mm. , the water yield of the pump will be reduced by 10%; Only need to add the asbestos line to resume arriving the interval stipulated of dispatching from the factory with the organic adhesive while overhauling, can make the pump oil consumption or electricity while working dawdle and reduce by 10%-12% .
Third, the axis of pressing the hydroecium and impeller is not coincident. According to testing, when the axis of pressing the hydroecium and impeller deviates from 2 mm. Or the drift angle and is greater than 2 degrees, the water yield of the pump will be reduced by 5%-6%; When overhauling, take measurement carefully only, careful to find accurately axis coincident position install firmly, can make the pump oil or electricity while working dawdle and reduce by 6%-7% .
Fourth, blade install corner to be inconsistent. Installing the blade when angles are inconsistent, the water yield of the pump will be reduced by 5%; When overhauling, chies of quantity accurate, installation counterpoint reinforce with angle, can make pump in work oil consumption or cable when dawdle and reduce by 5%-6%.
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