What is a Load Sensing Pump?

Load Sensing Pumps are one of the most interesting subjects in industrial hydraulics. With just a few tweaks to a typical pressure compensator, you get a surprising improvement in efficiency and responsiveness. Today, we begin to explore how load sense works; in future videos, we'll go a whole lot deeper.

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[lastnameavailableok]

truly fantastic animations and explanations

[Stutteringjohnfan]

Another great lesson from lightning McQueen!

[absalomachieshatumbu]

All this videos makes easier for me any time i am watching them thanks a lot

[steveh]

hi there, superb channel and great videos, you have helped me further understand hydraulics especially load sensing, i wish you had been around years ago, many thanks.

[mikebeta]

how does these two valves react on a closed centre system with respect to pump flow and system pressure

[LowRafael]

If I have a load sense pump, but dont use the load sense function i.e. plug the port, can the pump still work? or will I have zero flow out?

[GemmyHeart]

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[cck]

Excellent video, as you add bricks, the swash plate should also tilt more. Isn't it? Thanks.

[VanEugen]

Класс! Спасибо за видео это очень полезно.

[BEZIMMIENY]

No matter how many times I watch it, I still don't get it.

[JesusMartinez-mioh]

Great videos, Carl. I appreciate that you take your time in giving of such as priceless knowledge. You explain in a great and easy to understand matter! Excuse me, I would thank you that you could confirm me if the load sense is the same as the pressure and flow control (DFR), like the A10V piston pump from Rexroth has. I get a little confuse in finding out if both, load sense and DFR, are refering to the same thing, please!

[GMan-znuj]

As bricks are added and removed we see the pump swash plate angle change (i.e. pump output/flow rate changes). How then does the flow rate remain constant through the needle valve while the pump output is fluctuating?

[gerardbergepaija]

Hello Carl, I have a question. If I'm right, the piston speed is constant no matter the piston load is applied. To do so, we increase the presure of the pump in order to maintain the delta pressure and in consequence the flow. To do so, the LS is increasing the cm3 of the pump and this make me crazy. How it's possible that the LS increase the cm3 of the pump and the flow remains constant for a given pump speed? Does the pump maintains the speed?
Thanks for all the videos. Really well done.

[ameen]

How can understand either trouble in pump and lspc valve or main control valve?

[mechmancreations]

Sir, Can you provide a brief lecture about cartridge valves with animation.

[BloominOnion]

Here is where I am lost - in the video, the load pressure is brought about by stacked bricks (i.e, gravity induced load). What if I had a horizontal cylinder attached to a large mass? When I pressurize this horizontal cylinder, will it only see the 300 psi standby pressure since there is no gravity load to "backfeed" the circuit and make the pressure rise? I don't know how the system would ever produce high pressure under this scenario.

[fabwalk]

i'm a little confused here.
the whole purpose of the load sensing system is to maintain a constant flow rate across the orifice right? that implies that flow rate is changing when ever the load is altered. but we already know that a piston pump gives a constant amount of flow rate at a given plate angle. so the flow rate across the throttle must be the same regardless of load fluctuations.
i guess you see my predicament. please help me figure out what is missing :)

[ahmedmagdy]

Thanks for the great videos, some thing make me confused so please can you help me to understand this two points
1- If the load sensing give the spring a boast to reach 600 PSI which equal to the pump output pressure so how the sliding spool take a appropriate displacement to maintain a required flow to the swashplate piston?
2- Also what the relationship between the minimum and maximum pressure output and the selection of the bias spring and the swashplate piston diameter?

[pouicpouic]

il y a une erreur sur votre schéma... le signal de charge ne communique pas avec le ressort de la valve de régulation de pression, mais seulement avec le ressort du LS

[prateepgowda]

# you are showing in Delta P is constant, plz show this with proportional valve. With different opening the delta P is different and how it works with changing Delta P.