Regenerative Circuit | Construction, Working And Applications

In a typical hydraulic cylinder, the cylinder has a larger extending force that a retracting force. This is because of the difference in the area of the bore side and the annulus side of the piston. Hence, the hydraulic regenerative circuit can be used to equalize the force.
A circuit is said to be operating on the regenerative principle when the fluid returning from another end of the cylinder is forced into the head end of the cylinder. 
Obviously, some energy is consumed to force out the fluid from the piston rod end when the cylinder is extending. The regenerative circuit enables to utilize this part of the energy, which would have otherwise wasted. The net result of regeneration is increased in the cylinder speed, with the same discharge pump.

Construction and Working of Regenerative Circuit

The circuit in fig. depicts a typical regenerative circuit with a solenoid operated 4/3 direction control valve.
Regenerative Circuit, Hydraulic Circuit
Regenerative Circuit

The regenerative circuit is similar to the linear circuit except, the change in the center position of the direction control valve.
When the valve is in the central position the cylinder extends, with about twice the normal speed, thus effecting the regenerative function.
When the valve shifts to the right position, the regenerative effect is nullified and the cylinder moves with a normal speed which is decided by pump flow.
When the valve shifts to left, the cylinder retracts. The regenerative principle can be applied to any motion i.e. extending motion or retracting motion.
See Also: Different Types of Hydraulic Pumps

Applications of Regenerative Circuit

The regenerative circuit can double the speed of the extension of the piston using the same discharge pump. That means, there is no requirement of a larger pump for doubling the extension speed of the piston rod resulting in low operating cost.
Regenerative Circuit | Construction, Working And Applications Regenerative Circuit | Construction, Working And Applications Reviewed by Admin on 19:39 Rating: 5

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