SAI BD Hydraulic Motor

SAI BD Hydraulic Motor Product Introduction

GENERAL CHARACTERISTICS & FEATURES:

1) SAI BD series motor is a Five cylinder crankshaft design radial pistion hydraulic motor

2) The BD Series motor utilizes 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.

3) These include the possibility to change displacement, fit taper roller bearings for axial load capability, have a hollow through shaft option, and fit a counterbalance weight to smooth out high speed vibration. Its also possible to accept higher radial loading of the motor shaft due to a larger cross section giving extra strength.

CHANGE OF DISPLACEMENT:

Change of motor displacement in the BD Series is achieved by changing the stroke of the crankshaft. This is 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.

FREEWHEELING:

The BD Series motors can be freewheeled in full cavitation.

DESIGN & 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 & 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.

Type: BD1, BD2, BD3, BD5, BD6, BD6A