How do Submersible pumps work ?



recently submersible pumps have gained good market shares in both the industrial and domestic sectors due to their high versatility and reliability they need no priming they are not prone to the issue of cavitation and are very efficient the submersible pump is a centrifugal pump you can see how the impellers are throwing the water outwards the impeller blades are the backwards curved type here many of the impellers are connected onto a single shaft and this shaft is driven by an induction motor the water enters through the eyes of the impellers and they are then thrown out radially due to centrifugal action this way the water particles gain both kinetic and pressure energy now we need to pass this outlet water to the next impeller efficiently a stationary device called a diffuser is used for this purpose you can see how the water flowing from the impeller enters the diffuser the diffuser then deflects the Inlet water and makes it ready for the next impeller stage the next impeller is connected to the outlet of this diffuser the series of connected impellers multiplies the pressure gain at each stage this is the reason why submersible pumps produce a huge amount of pressure head the water so pumped passes through an inbuilt non slam check valve of the submersible pump the issue of water hammer is effectively reduced by the non slam check valve which is a huge issue in high-altitude pumping focus on the prime mover of a submersible pump generally an induction motor is used to run the impellers the power supply to an induction motor is given to the stator which can be either single-phase or three-phase the motor produces a lot of heat during operation and due to this reason the motor is either water or oil filled for effective cooling the continuously circulating coolant jacket around the motor makes sure that the motor never overheats you can see how a small impeller at the bottom maintains this circulating flow of coolant the entire impeller motor assembly is immersed in the working fluid this means that just as with conventional centrifugal pumps priming is not needed in submersible pumps another major issue faced by normal centrifugal pumps is the issue of cavitation one of the main reasons for this happening is the low pressure on the suction side in submersible pumps the water is pushed rather than pulled and this reduces the chance of a negative pressure head in the system and thus the issue of cavitation does not occur the high pressure head flow rate characteristics and the ability for it to be immersed completely in the water makes submersible pumps an ideal choice for borewell lifting firefighting and oil while lifting ninety percent of the oil wells in the world require some kind of artificial lift to achieve an economic flow rate there is no narrow flow region in the impeller and diffuser section of submersible pumps and this fact also makes submersible pumps the ideal choice for wastewater pumping and lifting highly viscous fluids moreover with a specialized design submersible pumps can be even used for slurry pumping we hope this video gave you a clearer insight into the working of submersible pumps thank you

43 thoughts on “How do Submersible pumps work ?

  1. 1 mile deeper motor powerful high start spin high speed water enter pump force push up 500 gallion per minute.

  2. Dat shocking uv/texturing on the pool – you need a better CG artist, one that can at least use normal maps and projections

  3. 1:09 Diffusor = Centrifugal Disperser
    2:13 Thirty-five years ago that "oil coolant" was probably Freon or some other CFC – – – ?

  4. Thanks my friend for this valuable information and I want you to explain to us how your battery works from your brother from Morocco

  5. The coolest thing about this video is the name now i know what is this called. Thanks keep this channel

  6. What causes it to keep shutting off? I have a client that has one of these and I have to reset it every (by pressing the button) But it has not been working right since we got it. I am thinking it is in the electrical. Can you help?

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