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Vane Motors

Hydraulic vane motors are used in both industrial applications, such as screw-drive and injection moulding, and mobile applications, such as agricultural machinery. Hydraulic vane motors have less internal leakage than gear motors and are therefore better suited for lower speeds: about 100 rpm minimum. The maximum operating pressure of hydraulic vane motors is between 100 and 140 bar, and they're used in both hydraulics and pneumatics.

Key features of hydraulic vane motors are:

  • Low noise level
  • Low flow pulsation
  • High torque at low speeds
  • Simple design 
  • Easy serviceability
  • Vertical installation friendly

In order to operate correctly, the vanes of the rotor have to be pressed against the inside of the motor housing. This is generally taken care of with spiral or leaf springs, but rods can be used as well. This precaution prevents issues with stationary motors, such as the vanes sinking into the grooves and causing the oil to flow over it instead against it. Most often, the rotor is hollow, thus enabling it to be easily mounted on a spline shaft.

Typical parameters:

Displacement volume: 9 to 214 cc
Maximum pressure: up to 230 bar
Range of speeds: 100 to 2,500 rpm
Maximum torque: up to 650 Nm