Another "myth to kill"??.....what makes it go???

[AKKAMAAN]

gpm gives you speed and psi gives you power. Of course a lot of other factors must be considered, but as a general rule thats the case.

To increase speed (change state of motion) you need increased pushing force.....see Newtons first law...

摘very object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.

Increased flow is a result of the increased force...

Power is the product of flow and pressure. You need both of them to generate hydraulic POWER......it is OK to say that increased "gpm", or flow will give you increased speed, but you will need increased FORCE (pump shaft torque) to be able to increase the flow and speed

 

[AKKAMAAN]

Having had to troubleshoot many hydraulic problems over the years, flow by itself won't do any work. It is the ability to make flow under pressure that does the work. I have tested many hydraulic pumps with a flowmeter that would make the recommended flow with no pressure, but as soon as you introduce a restriction, that flow it would drop to nothing. Most pumps are rated with a static flow at a given RPM and are expected to still flow at least 80% of that, up to the system relief pressure. Which also shows that pressure alone won't do any work, considering with the same flowmeter I can stop the flow and still have pressure.

Brian

Great post Brian!
A simple test rig for pumps, a Hedland inline flow meter, a pressure gauge, and a throttle valve...DO NOT FORGET THE SAFETY BREAKER/PRV....

see wdchyd's pictures on this previous post on another thread...

 

[wdchyd]

Don't mean to get off topic but how'd you reference just once post?

BTW, I really like this discussion:cool2:

 

[kennyd]

Don't mean to get off topic but how'd you reference just once post?

BTW, I really like this discussion:cool2:

Like this^^^^^?

Click the "quote" button in the lower right corner of the post you want to quote.

 

[AKKAMAAN]

Don't mean to get off topic but how'd you reference just once post?

BTW, I really like this discussion:cool2:

How to refer to another post - Tractor Videos - Kubota, John Deere, New Holland and More

Note! I use Google Chrome browser
In IE you right click and choose Copy Shortcut

Edit: use keyboard for cut, copy and paste, Ctrl-x=cut, Ctrl-c=copy, Ctrl-v=paste

 

[wdchyd]

How to refer to another post - Tractor Videos - Kubota, John Deere, New Holland and More

Note! I use Google Chrome browser
In IE you right click and choose Copy Shortcut

Edit: use keyboard for cut, copy and paste, Ctrl-x=cut, Ctrl-c=copy, Ctrl-v=paste

Now that's cool!!!!......More things to learn....:thumbsup:

 

[dcyrilc]

:thumbsup:

Sorry guys, I was busy yesterday attending the PNW TBN picnic at dcyril's farm in Woodinville WA

...

Uhhh...
...did I start something here without realizing it?:laughing:

You're not still thinking about my loader are you Per???

 

[AKKAMAAN]

Uhhh...
...did I start something here without realizing it?:laughing:

You're not still thinking about my loader are you Per???

hehe....no Cyril ...this is just a general discussion...but it might apply on your problem too....:laughing:

 

[Egon]

Water wheels (hydrodynamic science) do not really apply on current topic

You mean I missed the word "Hydraulics" in the original post??:confused2:

But then I never could figure out which way the effluent flowed nor If one could push on a rope!:ashamed:

 

[J_J]

You mean I missed the word "Hydraulics" in the original post??:confused2:

But then I never could figure out which way the effluent flowed nor If one could push on a rope!:ashamed:

I think the story went to { Wheel Barrel } force at one time.

If you want to know which way the effluent is flowing, just look down the pipe when flushing.