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Radial Piston Motor

Parker Radial Piston Motor as part of the Calzoni MR radial piston hydraulic motors. Unique Fluid Column Technology is utilized to achieve superior performances compared to competitive designs. Radial piston motors are engineered for high mechanical and volumetric efficiency over a wide range of speed and torque. The MR series motors are grouped into 11 different frame sizes, corresponding to 41 standard displacements available.

How does a radial piston hydraulic motor work?

The Motor Function is achieved through five pistons which are carried radially in a cylinder block mounted on the driveshaft which incorporates an offset from the centre of rotation. Hydraulic fluid under pressure from a pump is fed to each piston through fluid paths/channels in the crankshaft. Pressurising the pistons with direct hydraulic pressure from the fluid, when combined with offset driveshaft, produces a turning movement. This turning motion creates mechanical power which in turn drives the application.

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Radial Piston Motor
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Due to their special design, the MR motors deliver their maximum performance when the application requires high torque radial piston motors. The MR motors combine precise and smooth movements, both at low speed and during acceleration and deceleration transitions for high speed radial piston hydraulic motors. In addition, the high starting torque (up to 96%) allows the user to select a smaller displacement of the motor, optimizing the size of all the other system’s components. Motors can be customized by selecting different types of shafts, speed sensors, seals, and connection flanges. Optional accessories include gearboxes and parking brakes. Furthermore, MR motors can be equipped with optional built-on manifold blocks (cross relief, anti-cavitation, flushing and drain valves) to suit the customer needs. Other typical characteristics of MR motors are: – high power to weight ratio – high volumetric and mechanical efficiency – high resistance to thermal shock – very low operating noise levels – suitable for fire-resistant and biologically degradable fluids – extremely well suited for control engineering applications – reversible operation (motor and pump)