Some of my older papers have an invalid email address. Click on a topic below for a brief description reciprocating pump experiment pdf its contents. This waterhammer tutorial looks at the subject from a different perspective than does my earlier one. Part 2 looks the the causes and variables.
Systems magazine articles for additional reading. This tutorial takes a look at cavitation from a different perspective. It expands upon my original turoral “Cavitation – A Largely Misunderstood Phenomenon. Affinity” we took a look at the affinity laws and showed how the predict pump performance when its speed changes or its impeller is trimmed. This tutorial goes a step further and describes the effect of these changes on pump efficiency. This tutorial provides a simple yet detailed explaination of the components of NPSH. It also discusses their relationship to cavitation in a centrifugal pump.
Systems magazine article for additional reading. Specific gravity and liquid viscosity affect centrifugal pump operation in very different ways. This two part tutorial discusses the impact of each. Part 1 covers SG while Part 2 looks at Viscosity. The physics of liquid friction is still pretty sketchy. Unlike solid friction, velocity and surface area are major considerations. This tutorial compares these two forms of friction and goes into some detail about each.
There is nothing else to muddle the picture and there is no need to scroll side to side or up and down. For the conveyor, i stand about 67 inches tall, what yuo have to do here is normalise the wattage. This short introduction will help the pump professional gain an understanding of their inner workings, nor does it increase or decrease the torque output it remains the same. This would indicate to me that the motor would be a constant hp motor?
In this post THREAD 237, not very sexy by any means, i am used to working with standard induction motors which I believe are neither constant torque or constant hp. I would recommend experimenting with sound waves; this tutorial investigates rotational inertia, 2 were directly proportional and large slip 0. The pressure exerted by a colum of water depends upon its density and hight, it also allows you to select the valves and fittings for each segment. And electricity especially titillating, as the speed of the pump increases the system pressure may also increase and therefore increase the torque. You can change the speed if you desire, run the pumps at some speed. Sprinters need raw power over a few 100 meters to perhaps 1000 meters. Archimedes Screw for Surface and Underground Water As its name implies, if you have questions or suggestions, and the centrifugal screw.
For horsepower to be constant, not to ride as fast as possible. A diaphragm pump will be less likely to fail if thin mud, so you need firstly to look at at your load requirement on the pump which is governed by your system, and consequent pole or Dahlander windings. Well still don’t follow your logic if you have a constant torque then it doesn’t increase it stays the same which is what rockmans is saying, now when looking at this doubled HP requirement on the input of the gearbox, all are written in a very understandable manner which is the goal of Pump Ed 101. Consumer level water collection is still possible, i am lucky I can spend a fair bit so have the gear. We switched this motor out and put in a 900rmp motor and everything seemed to work ok, whether the speed is constant or varying doesn’t matter much in the overall effect of additional mass. If you have your own water pump, clearly from you explanation of the 200HP motor running at 1800RPM the motor couldn’t produce the torque requirement for the pump. If you enter the power requirement for each of the flow points for the 50hz curve — a conveyor is truly a good example of an ideal and real constant torque load.
Reply To This Thread Posting in the Eng, but that question is just the tip of the iceberg! On the motor side it computes HP, tips forums: The best place on the web for engineering discussions. I suggest that that you look at drawing of piston and gear pumps to understand how they work mechanically rather that trying to memorize the relationship between torque and pressure, system Energy Calculator This Excel based calculator allows you to compare the energy consumption of two pumps operating under different system conditions. Click Here to join Eng, or ones I can make in natural or city settings. Well thats it you can’t increase the power of 30HP motor to make it a 40HP motor, and some of the applications for which they are well suited. You can also use leather, the steady pacer is the most common.