What is Pump: Definition and 653 Discussions

A pump is a device that moves fluids (liquids or gases), or sometimes slurries, by mechanical action, typically converted from electrical energy into hydraulic energy. Pumps can be classified into three major groups according to the method they use to move the fluid: direct lift, displacement, and gravity pumps.Pumps operate by some mechanism (typically reciprocating or rotary), and consume energy to perform mechanical work moving the fluid. Pumps operate via many energy sources, including manual operation, electricity, engines, or wind power, and come in many sizes, from microscopic for use in medical applications, to large industrial pumps.
Mechanical pumps serve in a wide range of applications such as pumping water from wells, aquarium filtering, pond filtering and aeration, in the car industry for water-cooling and fuel injection, in the energy industry for pumping oil and natural gas or for operating cooling towers and other components of heating, ventilation and air conditioning systems. In the medical industry, pumps are used for biochemical processes in developing and manufacturing medicine, and as artificial replacements for body parts, in particular the artificial heart and penile prosthesis.
When a casing contains only one revolving impeller, it is called a single-stage pump. When a casing contains two or more revolving impellers, it is called a double- or multi-stage pump.
In biology, many different types of chemical and biomechanical pumps have evolved; biomimicry is sometimes used in developing new types of mechanical pumps.

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  1. T

    Exploring Early Classical Physics: The Water Pump Debate

    I read in the Britannica Encyclopedia yesterday that Rene Descartes rejected the idea that a water pump works because nature abhors a vacuum, and instead said that it works "by the weight of the water which counterbalances that of the air". I have an idea of the two contrary concepts opposed...
  2. N

    Increasing water pressure without increasing pump output

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  3. Pumpquestions

    Will this pump work for my artificial irrigation system?

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  4. S

    Use centrifugal pump as air pump?

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  5. Y

    Design of an 'open' venturi water pump

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  6. F

    Can I Use an Air Cylinder for Pumping Alumina-Filled Polyester Resin?

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  7. KingDaniel

    Steady Flow Energy Equation for a Water Pump

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  8. sophiecentaur

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  9. KingDaniel

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  10. S

    Overexertion of pump impeller?

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  11. KingDaniel

    Refrigerator and Heat Pump question

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  12. T

    Does a pump have a maximum flow rate for a given system?

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  13. N

    Can Variable Speed Heat Pumps Provide Different Temperatures at Different Loads?

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  14. G

    Why doesn't converter operate pump?

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  15. E

    (Extremely basic) centrifugal pump design

    Alright everyone, I know this is a huge question, but I've done enough homework to at least have informed ignorance on the subject. I posted a similar topic here, but that question was more conceptual and this definitely is much more of an applied use question. (Edit: I realize that the above...
  16. J

    24VDC 0,570 Amp pump controller

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  17. R

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  18. S

    Can I Connect a Smaller Valve to a Varian M4 Diffusion Pump for Lower Costs?

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  19. T

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  20. Kior

    Timescale of the biological pump？

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  21. halfgt2

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  22. F

    Understanding Choked Flow: How Pump Speed Affects Mass Flow and Velocity Changes

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  23. ishwarb

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  24. ecfedele

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  25. R

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  26. S

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  27. K

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  28. Dennis C

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  29. fish keeper

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  30. T

    How to convert power to energy in a heat pump problem?

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  31. H

    Function of an accumulator with a pump

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  32. JP Beaulieu

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  33. D

    Help with water pump calculations

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  34. A

    Water electricity pump, given efficiency percentage?

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  35. S

    Pressure Added to a Flow Loop by a Pump?

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  36. R

    Pump water from multiple tanks under vacuum by common pump?

    Is it possible to pump out water from three tanks all under a different vacuum level using a common pump and common suction header? Or would this arrangement cause problems? The destination is a single tank at atmospheric pressure. See Sketch below. I'm trying to intuitively figure how the...
  37. X

    Calculating pump pressures and power (Bernouilli)

    Homework Statement http://imgur.com/ktfgCAL flow rate: 0.057 m^3/s cross sectional area of all pipes: 1.864*10^-2 m² frictional losses inlet pipe: 1.83m frictional losses outlet pipe: 3.66m density: 1000 kg/m^3 g= 9.81 N/kg Asked: pressure at inlet pressure at outlet necessary pumping...
  38. EddieSpruce

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  39. C

    Centrifugal Pump: Pressure Drop & Power Calculation

    Homework Statement A centrifugal pump is used to pump water from one tank to another through 1000 equivalent ft of 4 in. schedule 40 steel pipe as shown in the figure. The second tank is located 25 ft above the first. Show that the pressure drop (in psi) in the pipeline between 2 and 3 is...
  40. T

    Energy grade line for a pump system

    Homework Statement http://postimg.org/image/lb6hsi843/ I am trying to draw an energy and hydraulic grade line for this system. The gauge pressure is supposed to be 0 at the points shown and those are centrifugal pumps. What I don't know is how flow and pressure vary throughout Homework...
  41. S

    Can I Use Aluminum for DIY Diffusion Pumps?

    Can I make diffusion pumps from aluminum? I am going to create parallel connected diffusion pumps for many UHV purposes. I see that aluminum that is treated to prevent outgassing is used for UHV valves, chambers, and reactors. I'd like to know what temperature diffusion pumps boil their...
  42. R

    Can a heat pump function without an evaporator and condenser?

    I am a mechanical eningeer, designing a prototype for a system in which a heat pump moves heat between two process tanks with built in heat exchangers. I want to use an off the shelf heat pump but I want the process tanks to be the evaporator and condensor. If I buy a heat pump and bypass its...
  43. K

    Pump compresses air into a tank

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  44. E

    Does the flow rate and pressure decrease as the exit height of a pump increases?

    OK, So I have been having an on and off debate with my family about this. I saw a pump at Home Depot that said it has a 30 ft head. Then it went on to show that the flow rate varied as the output of the pump changed in height. Now I thought that this was wrong. I just finished a course in...
  45. A

    Low voltage switching of a pump, on a countdown

    New member here. This might be the coolest subject for a forum I've seen in awhile (that probably sounds like robot spam). On to business... I have been scr*wed by a succession of people over our home's improperly plumbed hot water. It takes forever to get hot water to the faucets. I bought a...
  46. R

    Pumping out of a vacuum: Will a pump do it?

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  47. N

    Pump and nozzle output flow rate

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  48. A

    Interpreting efficiency of heat pump

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  49. wnh

    Calculating Power Requirement for Pump Filler for Ice Cream Project

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  50. M

    Can I use one hydraulic pump for two identical motors?

    Hello I need guidance on selection of a hydraulic motor. Motor would be used to drive the wheel of a vehicle. Motor needs to generate a torque of 18.3Nm in order to overcome static friction and move the vehicle. And the motor needs to be small enough to be coupled with the tire (see the picture)...
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