How Does A Hydraulic Motor Work Animation

The motor function in our SMA motor 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 in the crankshaft. Pressurising the pistons with direct hydraulic pressure from the fluid, when combined with the offset drive shaft, produces a turning movement. This turning motion creates the mechanical power which drives the application.

1. Oil is pumped into the motor. The red represents pressurised oil supplied to the motor and the blue is the used oil coming out.
2. Inside the motor you can see the section of the shaft which is offset from the centre of rotation. This is a key design feature to enable the motor to operate.
3. The red fluid represents the energised oil which pressurises the pistons to turn. The blue fluid represents the used oil coming out of the motor.

Our SMA motor is designed with a hardened high tensile steel crankshaft supported on hydro-static and taper roller bearings. The SMA motor can withstand both high mechanical and high hydraulic shock loads offering excellent life and continuous high power use. Speed and power ratings are significantly higher than standard high torque low speed (HTLS) motors.

Our SMA motors are typically designed for continuous 350 bar and intermittent 490 bar duty.