Method for increasing running efficiency of centrifugal water pump and combined elastic sealing device

Abstract

The invention relates to a method for increasing running efficiency of a centrifugal water pump and a combined elastic sealing device and belongs to the technical field of the centrifugal water pump. According to the technical scheme, the combined elastic sealing device comprises an elastic opening sealing ring (30) and a sliding bearing (31), wherein an annular slot (34) is formed in the outer surface of the sliding bearing (31); the elastic opening sealing ring is arranged in the annular slot (34); a shaft sleeve (36) is arranged on the exterior of a water pump shaft (37); the sliding bearing (31) is arranged on the exterior of the shaft sleeve (36); an annular sleeve (29) is arranged on the exterior of the sliding bearing (31); a sealing gap (32) exists between the sliding bearing (31) and the annular sleeve (29); the gap is closed by the elastic opening sealing ring (30). The invention has the beneficial effects that the gap between a centrifugal water pump impeller and a sealing ring (opening ring) is reduced or eliminated, the water consumption for balancing axial thrust of the water pump is reduced, the running efficiency of the water pump is increased, safe and efficient running is realized, the energy consumption is reduced, the safety is guaranteed and the labor intensity of the staff is reduced.

Description

technical field [0001] The invention relates to a method for improving the operating efficiency of a centrifugal water pump and a combined elastic sealing device, which can reduce or eliminate the gap between the impeller of the centrifugal water pump and the sealing ring (orifice ring), reduce the water consumption of the water pump to balance the axial force, and belong to the centrifugal water pump technology field. Background technique [0002] Centrifugal water pumps are widely used in various fields of the national economy and are important equipment for drainage. Realizing their safe and efficient operation has significant social and economic benefits for reducing energy consumption, ensuring safety and reducing labor intensity of employees. Centrifugal water pumps have the following characteristics: 1. Wide application: Centrifugal water pumps are widely used in various fields of mine, enterprise and urban drainage and agriculture, especially multi-stage centrifugal ...

AI Technical Summary

Problems solved by technology

4. Hydraulic loss includes hydraulic friction and local resistance loss

After the pump runs continuously for a certain period of time, due to the friction between the parts, the gap increases and the volumetric efficiency decreases. The volume loss of the pump is the most important loss after the design of the pump is finalized. The gap between the gap with the water wheel) and the gap between the water wheel and the loss of the balance plate to balance the axial force of the water is the main loss

The gap between the impeller sealing ring (mouth ring) and the water wheel ensures the normal operation of the water pump, prevents the water wheel and stator from burning or burning due to the disturbance of the shaft and the high-speed operation of the water wheel, and prevents the excessive water gap from affecting the efficiency of the pump Generally, the gap between the sealing ring (mouth ring) and the water wheel is required to be about 0.6mm. After testing and using the gap between the sealing ring (mouth ring) and the water wheel, the efficiency of the water pump will decrease by 1% when the gap between the sealing ring (mouth ring) and the water wheel increases by 0.1mm. When the gap reaches 1mm, the efficiency 18% drop

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