Test bench gear torque conversion unit

The energy-efficient solution of load test benches based on the principle of the torque conversion circuit. Here, load tests with high test outputs can be performed at a substantially lower drive power. Test stand gears from Koellmann Gear are available with an internal or external torque conversion unit. Upon request, a customised torque conversion unit can also be installed – the gear will then be prepared accordingly.

Available are

  • mechanical torque conversion unit
  • hydraulic-mechanical torque conversion unit
  • electro-mechanical torque conversion unit
  • hydraulic torque conversion unit      

Mechanical torque conversion unit

The mechanical torque conversion unit is the simplest form of creating a torque conversion circuit. Here, two flanges are rotated against each other and connected with one another, e.g. by screws. This simple form of torque conversion unit is suitable for test benches in accordance with FVA 563 I.

Areas of application:

  • cost-effective solution
  • only suitable for low load torques
  • Load torque can only be modified while in standstill
  • Pivot angle ꚙ

Electro-mechanical torque conversion unit

The electro-mechanical torque conversion unit is based on the same principle as a planetary superimposition gear. The load torque is generated by an electric motor. A second electric motor rotates the torque conversion circuit.

Areas of application:

  • all areas of test bench technology
  • no oil supply unit needed
  • Pivot angle ꚙ

Hydraulic-mechanical torque conversion unit

The hydraulic-mechanical torque conversion unit utilises the same principle as a steep thread. The unit is thereby integrated into the torque conversion circuit. The load torque is generated by applying hydraulic pressure to a cylinder, and rotating two shaft ends in opposite directions using an internally integrated element according to the principle of a steep thread.

Areas of application:

  • Load torque can be adjusted while in operation
  • Hydraulic unit needed
  • Pivot angle up to 360°          

Hydraulic torque conversion unit

The hydraulic torque conversion unit adheres to the same principle as the swivel motor. The torque conversion unit is thereby integrated into the torque conversion circuit. The load torque is generated by hydraulic pressure by rotating the housing and a rotatable shaft housed therein in opposite directions.

Areas of application:

  • Load torque can be adjusted while in operation
  • Hydraulic unit needed
  • Pivot angle up to 270°

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