Method of abrasive grinding and reduction of centrifugal two-way "D" type pumps

Abstract

This article discusses the sludge passing through double-entry “D” type pumps, which constitute the largest part of the pumping stations and devices for water supply for agriculture, causing severe abrasive wear of their internal parts. As a result, the characteristics of the pumps change, namely, water consumption-Q, pressure-N, useful efficiency-η and the maintenance interval decrease. According to the operating rules of double-entry pumps, only 0.1% of sludge with a size of 0.1 mm should pass through these pumps. The amount of sludge of a size that cannot pass through the pump is 47.2%, and in the pumping station unit it is 47.32%. The results obtained show that the size and amount of abrasive sludge in all water sources are several times larger than the size and amount of sludge that can pass through the pumps. It has been shown that parts of various types of pumps in all pumping stations and installations installed throughout the territory of our republic are susceptible to abrasive corrosion.