Lecture 4 | How regenerative hydraulic circuit works

This video explains how regenerative hydraulic circuit works.
The regenerative circuit is used to increase the out-stroke speed of piston of a double - acting cylinder.
In this circuit, the fluid from the rod end of the cylinder regenerates with the pump flow. Due to this volume of the fluid supplied to blind end of the cylinder is greater than the pump flow rate.

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[sharathsuri]

Your explanation is awesome. Thankyou so much for simplifying the stuff

[PremJayswal]

During the backward motion of the piston, the fluid flows from 4 to 3 so won't the piston get stuck on the blind end of the cylinder

[prithawayansinha]

Sir, in the circuit there will be a check valve after the pump or it will damage the pump.

[josephgan]

why during the position where port P connected to 1, the fluid will not travel to 1 and 4 simultaneously?

[Alan_Hans__]

Could I get a couple of questions answered.
1. Is the force that the ram is capable of significantly reduced? I'm thinking that it is only going to be the are of the rod divided by the area of the cylinder multiplied by the pressure. This would typically mean about 30% of the force?
2. Is the pressure on the retract stroke going to be the pressure relief pressure?

[subinnair]

Even NPTEL has d wrong circuit diagram.... Thanks for the correct one !!

[winnersachin]

My concept is clear now
I always had confusion that whats the difference between common ckt and regeneration ckt
Thank u so much☺️👍👍

[nitishkumargupta]

Isn’t there pressure port pressure will be more than return side, so how will return line oil will enter in to pressure side line?

[humanjoy]

If you simulate, this will not work. How you will retract the piston to leftmost position? You have blocked port 2 of DCV

[shahrukhbukhari]

How can we use same system using hi lo circuit with double pump and PCM. Please guide.

[bot-ucnf]

can i dw your vid for my presentation video .. please .. tq

[salahaddinmuhammad]

Hi there!
How would the hydraulic power compare to the mechanical power of such a circuit?

[alphawolf]

It would be really helpful if you would have explained the role of pressure gauge and pressure relief valve and how to use them in different questions. Btw thanks for the great explanation.

[loststars]

Tnx about this useful video from korea

[susie]

Using this system would reduce the amount of force the piston can produce, as force is arrived by multiplying pressure times area, on a normal circuit pressure is only applied to one end at a time so extending the rod you apply pressure to the head of the piston and allow the rod end open to the tank so no pressure is applied, if we use a simple number of 3 square inches for the piston area and one square inch for the rod area using 9 psi of pressure so on a normal circuit you have 3 square inches times 9 psi which is 27 pounds force on extending the rod and to retract the rod you have 3 square inches minus the 1 square inch of the rod where no force is applied which gives you 2 square inches times the 9 psi which gives 18 pounds force on retracting the rod which most circuits require,
On this regeneration circuit what you get is on extending the rod you have the 9 psi pushing on both the 3 square inches of the head of the piston plus the 9 psi pushing on the 2 square inches on the rod end of the piston which gives you 9 pounds force on the head and 6 pounds force on the rod end so you end up with 9 pounds force minus the 6 pounds force from the rod end so you end up with only 3 pounds force on extending the rod and the normal 6 pounds force on retracting the rod so you end up loosing ⅔ of the force along with having pressure on the rod end seals all of the time insted of only when retracting the rod.

I can see no advantage for using this type of circuit on any real world application unless you want to wast energy or lower the amount of force applied to the extending ram which you could get by just lowering the pressure relief valve setting.

[ramquait]

in the second case why would the piston extend the pump applies pressure on both sides

[sharathsuri]

Sir please explain pump unloading circuit and double pump hydraulic circuit. pleaseeee make a video

[mdyasin-ydis]

00:01 Technicians implement regenerative hydraulic circuit
00:11 Regenerative hydraulic circuit helps in energy conservation
00:21 Regenerative hydraulic circuit lacks legal origin
02:09 Regenerative hydraulic circuit increases efficiency
02:12 Regenerative hydraulic circuit improves efficiency and reduces energy consumption.
03:22 Regenerative hydraulic circuit enhances efficiency
03:24 Components located outside in regenerative hydraulic circuit
03:27 Understanding the operation of the regenerative hydraulic circuit

[sefakutsal]

this is not a regenerative circuit. A regenerative circuit uses float position at the DCV center position.

[omkarshinde]

In left most position of DCV, pressurized fluid from pump gonna enter in Port 3 and 4 as well, so piston won't move anywhere..isn't it? PLEASE ANSWER ELSE I'LL UNSUBSCRIBE CHANNEL. THIS IS BASIC OBVIOUS thing I'm asking