Reliability and safety of cascades of irrigation pumping stations

Abstract

The main goal of increasing the reliability of cascades of pumping stations of mechanical water lifting systems includes calculating the reliability of main facilities. Identification of the main problems of reliability and safety of operation of cascades is based on the stated theoretical premises. Effective measures to combat sediment and driftwood during water intake from the river into supply canals are considered. Using a full-scale survey of water intakes, digital modeling of the developed mathematical models of the supply channel of the main Karshi and Kuyumazar pumping stations was carried out with algorithms for calculating their operating modes. clarification of the physical nature of failures, especially emergency shutdowns. Studies taking into account non-stationary pressure pulsations in pumps, especially the interaction of mating units and working parts of the pump, have established a connection between pressure pulsations and flow structure, as well as a decrease in reliability when parameters change. The applied parametric diagnostics made it possible to estimate the spectrum of vibration acceleration amplitude on the pump impeller chamber. Mathematical models have been created for pressure pipelines of large-diameter pumping stations. Dependencies for calculating the total longitudinal and transverse vibrations of the pipeline with their interaction are proposed. Increasing reliability during the rehabilitation of cascades will significantly increase the service life of structures and pumping equipment, ensuring a guaranteed water supply.