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Analysis on the Causes of Insufficient Flow in Centrifugal Pumps
Centrifugal pump its main working principle is: Centrifugal is the performance of the object inertia. For example, drops of water on an umbrella, when the umbrella slowly turns, the drops of water will follow the umbrella. This is because the friction between the umbrella and the drops of water acts as a centripetal force to the drops of water. However, if the umbrella rotates faster, the friction is not enough to make the water drop circular motion, then the water droplets will move away from the umbrella to the outer edge. It's like using a rope to pull a stone in circular motion. If it's too fast, the rope will break and the rock will fly out. This is the so-called centrifugal centrifugal pump is designed according to this principle. High-speed rotation of the impeller blades to rotate the water, the water thrown, so as to achieve the purpose of delivery. Centrifugal pump flow through a variety of methods can be stepless adjustment, under normal circumstances, the pump at the rated point conditions work most reasonable, but sometimes for some reason causes the pump to run at a large flow point conditions, will cause some of the following negative influences. So, the reasons for insufficient flow of centrifugal pump what is it? 1, import and export pipelines, centrifugal pump impeller runner blockage, scale deposition inside the pump body. Check the pipe and pump chamber to clear the blockage and readjust the valve size. 2, the voltage is low. Centrifugal pump flow solution: stable voltage. 3, the motor is running in the wrong direction, the motor phase loss is very slow speed. Change the motor wiring to adjust the motor steering, check the power into the line fastening the motor wiring. 4, centrifugal pump inlet pipe leaks, causing the centrifugal pump has been in the state of suction air. Check the inlet pipe leakage repair leaks, tighten the sealing surface, remove the air. 5, the centrifugal pump is not filled with liquid, the pump cavity with air. Unscrew the top cover of the centrifugal pump or open the exhaust valve to drain the air. 6, centrifugal pump inlet pipe flow less than the required flow of centrifugal pumps, or suction too high, centrifugal pump inlet pipe valve seal poor leakage. Stop pump inspection (pipe network and suction pipe with the use of this phenomenon), adjust the suction distance to shorten, or replace the self-priming pump. 7, the pump outlet pipe resistance is too large, improper pump selection or the pump head can not reach. Reduce the pipe bend, too many elbows can be fitted with automatic exhaust valve to exclude the condensation of air at the bend of the pipe, or re-select the pump. Encyclopedia: The basic structure of the centrifugal pump is composed of six parts are the impeller, pump body, pump shaft, bearings, seal ring, stuffing box.