High-flow and high-lift yellow river water diversion centrifugal pump wear-resisting ring and preparation method thereof

Abstract

The invention discloses a high-flow and high-lift yellow river water diversion centrifugal pump wear-resisting ring and a preparation method thereof. According to the size of an original water pump ring, the original water pump ring is modified, a polyurethane material superior in abrasion resistance is preferred, a steel screen is embedded to increase the overall rigidity and bonding strength of the structure, and a steel-plastic composite polyurethane outer ring body is manufactured; and by the adoption of a hard alloy thick film coating technology, a water pump tungsten carbide inner ring body is manufactured. The inner ring body and the outer ring body of a water pump are used in cooperation; and compared with an ordinary carbon steel ring, the abrasion resistance is increased by more than 5 times, the service life is prolonged by more than 5 times, liquid is effectively prevented from largely flowing to a low-pressure area from a high-pressure area, long-term operation of the water pump in a high-efficiency area is ensured, the water filling amount is increased, the power consumption is reduced, and accordingly the purposes of energy saving and efficiency improving of the water pump are achieved.

Description

technical field [0001] The invention relates to the field of a centrifugal water pump for large-flow and high-lift Yellow River diversion, in particular to a wear-resistant mouth ring of a centrifugal water pump for large-flow and high-lift Yellow River diversion and a preparation method thereof. Background technique [0002] Although the Yellow River runs through the arid and rainless areas in Northwest my country, the water is low and the land is high. Human and animal survival and agricultural production are threatened by serious water shortage all year round. In order to solve the problem of water shortage in grain production, a large number of large and medium-sized irrigation and drainage pumping stations have been built, and water has been pumped from the Yellow River for farmland irrigation and agricultural water use. made a huge contribution. [0003] The water pump has been eroded by the sediment of the Yellow River for a long time, resulting in serious abrasion o...

AI Technical Summary

Problems solved by technology

The composition of the sediment in the Yellow River is relatively hard. The metal hardness of the water pump is much smaller than that of the sand grains. Under the premise of high head, the sand wear is accompanied by cavitation, and the cavitation intensifies the wear, which causes serious abrasion problems. High-speed sand The erosion of the water flow to the mouth ring, and the mutual friction between the ring and the impeller inlet and the pump casing will cause the metal surface protection layer to be washed away, which will seriously reduce the efficiency of the water pump.

The test observation data show that: after 4000h-5000h of operation of the newly installed mouth ring, the average wear on one side of the impeller mouth edge exceeds 2mm, the wear depth of the mouth ring exceeds 3mm, and even perforation occurs, resulting in a decrease in the water diversion efficiency of the entire pumping station system and an increase Once it is damaged to the extent that the water leakage is too large, it must be replaced when it cannot be effectively supplied with water, which greatly increases the maintenance cost of the pump station, and affects the water supply efficiency and social benefits of the pump station.

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