Uploaded byBrian Gongol
Introduction to Pump Hydraulics - v.15
The document discusses different types of pumps used in hydraulic systems. It introduces positive displacement pumps, which physically push fluid through high, consistent pressures, and centrifugal pumps, which use an impeller to create pressure differentials and push fluid. The document outlines key components of centrifugal pumps like wearplates, impellers, shafts, and seals. It also discusses factors that influence pump performance like system head curves, pipe roughness, air pockets, valves, and multiple pump configurations. Safety considerations for pumps are also addressed.
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Introduction to Pump Hydraulics - v.15
- 1. INTRO TO PUMPHYDRAULICS Brian Gongol DJ Gongol & Associates, Inc. November 2, 2023 Nebraska Section AWWA Joint Fall Conference Kearney, Nebraska
- 2. Pump: A machinefor adding energy to fluid
- 3. ...causing it todefy gravity
- 4. It's a conversion(but not a religious one)
- 5. Atmospheric pressure intosomething useful
- 6. Energy in •Pressure and flow out
- 7. Trade-off: Your thumbover a garden hose
- 8. Main pump types Positivedisplacement Pushers Centrifugal Spinners
- 9. Positive displacement physicallypushes the water
- 10. High, consistent pressures& specific volumes
- 11.
- 12.
- 13.
- 14.
- 15. Good with thickfluids that don't like to flow
- 16. Centrifugal pumps createpressure differential
- 17. Low pressure ateye, high pressure at discharge
- 18. Most collection systempumps are centrifugal
- 19.
- 20. Containing the actionof an impeller
- 21. Wearplate, impeller, shaft,sealplate, & seal
- 22. Three primary stylesof centrifugal pump
- 23.
- 24.
- 25.
- 26.
- 27. Atmospheric pressure pushesinto the low
- 28. Discharge to higherpressure
- 29. Science of atmosphericpressure
- 30. Weight of acolumn of air above you
- 31. Forces that offsetits effects
- 32.
- 33. Losses on theway to the low
- 34. Friction en routeto the impeller eye
- 35. Includes piping andlosses inside the pump
- 36.
- 37. Also important: Asensible safety factor
- 38. A hurricane isone way to think of it...
- 39. ...but so isa tire on a wet or muddy road
- 40. Pressure and flowas a production frontier
- 41. A pump performswhere the system allows it
- 42. Figuring system headcurves
- 43. Two pairs ofthings to consider
- 44. Pair 1: Statichead and friction head
- 45. Pair 2: Suctionhead and discharge head
- 46. The moving targetis usually discharge piping
- 47.
- 48. Solids buildup (settlingand sedimentation)
- 49. Mineral deposits andtuberculation
- 50. Scouring velocity isimportant but not enough
- 51. Pockets of aircan restrict flow, too
- 52. Valves and appurtenances:Equivalent length
- 53. Plotting today's headcurve vs. tomorrow's
- 54. Plotting multiple pumpspeeds
- 55. VFDs are nomagic bullet
- 56. Static heads determineVFD usefulness
- 57. Very little aboutpumping is linear
- 58. Opening or closingvalves is rarely linear
- 59. Pipe diameters andflow rates aren't linear
- 60. Friction losses aren'tlinear
- 61. Multiple-pump operation isn'tlinear, either
- 62. Pumps in seriesincrease heads
- 63. Pumps in parallelincrease flows
- 64. Know what you'regetting in advance
- 65. Parallel operation ona flat system head curve
- 66. Parallel ops ona rising system head curve
- 67.
- 68. Parallel-series operation ona curve
- 69. Pumps don't suck,but cavitation does
- 70.
- 71.
- 72. Always use thesafest available pump
- 73.
- 74.
- 75.
- 76. Where a floodedsuction makes sense
- 77.
- 78. Where self-priming pumpsmake sense
- 79. Questions? Thank you forcoming! Brian Gongol DJ Gongol & Associates 515-223-4144 info@djgongol.com www.gongol.net Facebool, Twitter, or LinkedIn: @djgongol Call or email anytime
- 80. References and credits Catalogimages of pumps courtesy AMT Pump Co. Hurricane imagery from NOAA (public domain) http://www.nnvl.noaa.gov/cgi-bin/index.cgi? page=items&ser=112503&large=1 Propeller image from the US Navy (public domain) http://www.history.navy.mil/photos/sh-usn/usnsh-g/ap126-d.htm Wildly incorrect isometric image of a purported progressive-cavity pump generated by Bing AI Lift station sample diagram and pump cutaway photo courtesy The Gorman-Rupp Co. All other photos are original work of and copyright reserved by Brian Gongol