FP Series Catalog - SAi Hydraulic Motors

1 Technical CatalogHigh Torque, High Speed Radial Piston Hydraulic MotorsFS/FP SeriesSAE OUTPUT MOUNTIn Partnership WithThe Catalog at hand presents the Plan Star Revolution Series of SAE output mount Motors and gearbox com-binations. This range has been developed by skilled technicians with years of experience in planetary gear design and was meant to be an evolution to already existing products on the world market. As the design came together and the initial units were assembled, the Engineers at Plan Star quickly came to realize their evolution in planetary gear technology was more of a revolution.

2 Plan Star Revolution Series provides features others can t o! er. PSR Revolution Planetarty GearboxesOur complete range allows for easy selection of the best performing unit for any application. We can build units that are speci" cally tailored to our customer s needs. In the end this comes up with savings for the customer: why buy more than is actually needed? By speci" cally tailoring the units to the customer s needs. we are able to maintain a competitive edge in both pricing and delivery. The Revolution Series shares interface dimensions with older designs, thus allowing for easy replacement where interchangeability with older units is a DesignThe Plan Star Revolution Series consists of a complete range of units.

3 We can o! er many di! erent sizes with torque output up to 6,600 lb-ft. The ratios o! ered can range from 3:1 to over 1700:1, with a fully modular struc-ture. the units can be supplied with or without a brake, and with many di! erent shaft options. These units o! er a compact design and extremely high e# ciency (up to ). All gearing is heat treated to obtain the best performance and e# ciency. This is supplemented with close tolerances on all components, as well as $ oating planet carriers for even load sharing.

4 Spline pro" le gears, all roller bearing design, and large diameter shafts contribute to the quiet operation of the unit. This and many other features distinguish Plan-Star assemblies from the competition. We start where others not even arrive! Crankshaft Design Radial Piston MotorsThe main characteristics of this type of motor are high mechanical e# ciency, especially at start-up, and high volumetric e# ciency. Interchangeable parts enable Motors to be built that are tailored to the customer s speci" c needs.

5 A number of features distinguish SAI Motors from other radial piston designs. The design of the radial motor with the crankshaft and oscillating cylinders provides very high starting torque e# ciencies as well as other CylinderThe cylinder (1) remains aligned with the eccentric path of the crank (3), eliminating side loading between the cylinder and the piston (2). The articulation of the cylinder-piston assembly is achieved with large diameter trunnions (4) which ensure low speci" c loads. Larger trunnions (12) increase their strength and sti!

6 Ness while reducing speci" c loads. Larger Trunnions also allow Hydraulic balancing(13), which reduces friction, wearing and heat generation. This enables operation using higher pressures and speeds. INTRODUCTION FP SeriesDouble Piston Support BearingThe pistons transmit their load to the shaft via a hydrostatic bearing (5) and a central roller bearing. The hydrostatic bearing reduces metal to metal contact ensuring optimal lubrication and low friction. The roller bearing minimizes the friction between the piston and the spherical piston support ring, reducing heat and wear while improving low speed operation and starting torque.

7 The mechanical e# ciency of the SAI motor is typically higher than 90% at 400 bar (5800 psi). Piston Retaining RingsThe piston retaining rings (7) ensure that the piston remains in contact with the shaft in all operating conditions. The retaining force counteracts the separating force continuously, thus preventing lifting, tilting, or hammering of the piston during cavitation. This also helps extend the life of the motor as well as reduce the noise generated. SAI Motors are extremely quiet. The noise level can be reduced further by using a back pressure of 5 - 10 bar (70 - 145 psi) on the motor.

8 Please note that pressure lines and motor support structures can propagate or even amplify the sound from the motor. Rotary Axial DistributorOptimal distribution is achieved with short ducts that have wide diameters in the rotary axial distributor (8). This reduces the power loss when high $ ow rates are present and achieves high volumetric e# ciency. Precision machining and high performance seals provide optimal functionality thought the life of the motor as well as protecting against thermal shock. The distributor housing (9) is interchangeable, providing a wide range of pressure ratings, port sizes, and $ ow control options.

9 The Motors are available, on request, with a special distributor which ensures silent working conditions. A radial cylinder injection feed eliminates direct Hydraulic axial loading of the motor casing. The large cylinder feed channels (10) drastically reduce power loss due to drag. Stronger Castings (11) as well as internal reinforcement ribbing increase the load capacity, as well as allow for higher internal pressures when compared to previous products. FP Series !"#$%&'('#)*&+, !&! 2%3#4)5#62% %7# <=1%">2%3#4)?

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