Review Paper on Application of Variable Displacement Linkage in Radial Piston Pump

Radial piston pumps are valve controlled with cylinders in a radial arrangement. The cylinder radials in one, two or several superimposed layers (stars) are driven by bearing fitted eccentrically on the drive shaft (piston pressure stroke), then being returned to their idle position by springs (piston intake stroke).The fluid being delivered by the various cylinders is collected via manifolds feeding one joint pressure port. The pump housing shells are loadbearing elements supporting the cylinders and shaft bearings. The pumps run very smoothly as the drive shaft is statically balanced via counter weights. With the exception of the single- and double-cylinder pumps, there is always an uneven number of pistons per cylinder radial, which minimizes any pulse effect on the pump deliver.