GENERAL CHARACTERISTICS AND FEATURES
The B
series five cylinder crankshaft design radial piston hydraulic motor
utilises many of the proven components from the GM series motors, well
known for their high performance and reliability. The innovative design of
the new sliding central bearing arrangement, made possible by the latest
materials and manufacturing techniques increases the range of possible
options in SAI hydraulic motors. These include the possibility to change
displacement, fit taper roller barings for axial load capability, have a
hollow through shaft option, and fit a counterbalance weight to smooth out
high speed vibration. It’s also possible to accept higher radial loading
of the motor shaft due to a larger cross section giving extra strenght. CHANGE OF DISPLACEMENT
Change of motor
displacement in the BD series is achieved by changing the stroke of the
crankshaft : min.20 bar - max- 30 bar. The change This can 0be achieved by
a low pressure external pilot signal and changes from high to low
displacement and vice versa can take place both dynamically, with a smooth
speed variation, and statically.The BD series motors can be freewheeled in
full cavitation. DESIGN AND OPERATION
The sliding bearing
has an extremely low coefficient of friction and as a consequence gives
very high starting torque efficiency, and continues to achieve higher then
average mechanical efficiencies both in high and low displacement modes.
At present, the maximum running speed is restricted to the flow which can
pass through distributor which is fitted to this series of motors. STARTING AND LOW SPEED TORQUE
The motors are
capable of working at low speeds with a high degree of speed stability.
The minimum stable speed depends on the displacement of the motor. Output
torque remains very constant and does not fall away at very low speeds or
under stall or start conditions.
general characteristics and features  |
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displacement (cm³/rev) |
specific torque (Nm/bar) |
technical data pdf |
| BD1 | |
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| BD2 | |
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| BD5 | |
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