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Fluid coupling type TurboBelt TPXL Family

TurboBelt 500 TPXL

The increasing need for raw materials places continuously growing demands on conveying capacity in mining. With double the power transmission capability in the same installation space, the Voith TurboBelt 500 TPXL is specifically designed to meet the requirements of belt conveyor drives.

Thanks to the proven hydrodynamics, the TurboBelt 500 TPXL provides smooth and wear-free power transmission. Its compact design makes it easy to install the hydrodynamic coupling to the driveline. The integrated intelligent controller with open communication capabilities leads to optimized coupling and conveyor performance in every operating mode. By providing the ideal torque limitation, the controller protects the belt from overload. Rugged, robust and compact, the TurboBelt 500 TPXL is engineered to the highest standards for greater availability and reliable operation.

The quality of control during the starting process is a key factor for belt-protecting operation. The TurboBelt 500 TPXL provides a convincing solution with precise,
easy-to-control speed and torque transmission. With multi motor operation, several TurboBelt 500 TPXL couplings are connected through the TurboBelt DriveControl system in a network manner. The simple integration into the main PLC ensures the condition monitoring of the system together with an option for remote access.

TurboBelt 780 TPXL

TurboBelt 780 TPXL is a powerful, fill-controlled fluid coupling for six- or eight-pole aysnchronous motors used in belt conveyor drives. Thanks to its innovative XL blade wheel shape, the coupling transfers 100% more power than standard couplings of the same size. This increases the productivity of the belt conveyor.

Its compact design allows easy installation, a significant advantage in the case of mobile belt conveyors. This lets you quickly install the coupling and ensures simple drive operation.

The TurboBelt 780 TPXL provides a convincing solution with a precise, easy-to-control torque transmission. Even fully laden belt conveyors are given a smooth start-up. This increases the service life of your belt and all drive components.


Voith GmbH & Co. KGaA
Hydrodynamic Couplings
Voithstr. 1
74564 Crailsheim, Germany

Sales, Technical Consulting, Quotations
Tel. +49 7951 32-409
Fax +49 7951 32-213

Service, Spare parts, Repair
Tel. +49 7951 32-1020
Fax +49 7951 32-554

24/7 Technical Emergency Helpline
+49 7951 32-1616

Benefits and uses

  • Load-free motor run-up
  • Smaller and lighter (approx. 50%) than comparable couplings
  • Higher power transfer (approx. 100%) compared to couplings of the same size
  • Allows unlimited sequential loaded starts
  • Protects the drive in case of an overload
  • Protects system components - the service life of your system increases
  • Robust and unsusceptible to environmental influences
  • Wear-free power transmission
  • Reduced maintenance and repair work
  • Automatic load sharing in multi-motor drives protects your motor against overload
  • Innovative speed & torque control logic (TurboBelt 500 TPXL)
  • Self-diagnosis functions & remote maintenance (TurboBelt 500 TPXL)
  • Sequential startup of the motors reduces the load on the supply circuit

Typical fields of use

  • Belt conveyor systems in open pit, underground, overland, harbors


TurboBelt 500 TPXL

Type A B C D G1 H1 G2 H2
TurboBelt 500 TPXL 990 535 1070 728 100 210 90 130
TurboBelt 500 TPXL self-supported version 890 550 1085 820 90 140 90 130

Dimensions in mm

Left: TurboBelt 500 TPXL
Right: TurboBelt 500 TPXL self-supported version

Power Range

Type Speed range Power range
TurboBelt 500 TPXL 1200 – 1800 rpm 250 – 600 kW

TurboBelt 780 TPXL

Type A B C G (m6) H2
780 TPXL
1321 745 1150 140 260

Dimensions in mm

Power Range

Type Speed range Power range
TurboBelt 780 TPXL 900 – 1200 rpm 1100 – 1900 kW

Technical information

Operating principle

         <br />
        Operating principle of the hydrodynamic power transmission
Operating principle of the hydrodynamic power transmission

Hydrodynamic couplings transmit mech­anical power from the motor to the driven machine via a flow of fluid. This occurs by means of two bladed wheels positioned face to face. The primary wheel (red) is connected with the motor and acts like a rotary pump, the sec­ond­ary wheel (blue) is connected to the driven machine and acts like a turbine. Power transmission is pro­por­tional to the fill level in the working circuit. As a result of the mechanical separation of the drive and driven sides, the hydro­dynamic couplings transfer the power wear-free and dampen the torsional vibration and torque shocks in the drive chain at the same time.

Fill-controlled couplings

With fill-controlled couplings, a control device continuously changes the transmission behaviour. This is carried out by changing the filling level and is made possible by controlling the flow of the operating fluid supply and draining using valves.

Fill-controlled couplings have an external fluid circuit which is also used for cooling. This means that these couplings have a very high heat capacity permitting long drive processes with high loads. This increases the productivity and reliability of your equipment.

When starting, fill-controlled couplings are completely empty thus enabling a load-free motor run-up. This relieves and protects the motor and electric network.

TurboBelt 500 TPXL

Innovative XL profile

The TurboBelt couplings have an innovative wheel profile, the so-called XL profile. Voith engineers developed this profile with the latest CFD simulation. Drawing on many years of experience and know-how, they managed to get more operating media into the working circuit of the coupling. This leads to a higher power transmission with the same installation space.


Voith doesn't just supply couplings, we are also your engineering partner for customer-specific drive solutions:

  • Designing of complete drives
  • Dimensioning the coupling for the optimal use of your system
  • Analysis and optimization of the operating state of drives in existing systems (retrofit)
  • We can advise you about the selection of optimal start-up technologies
  • Competence in systems for all mining equipment and the bulk material industry


Stakeholder Survey 2018 – Voith GmbH & Co KGaA

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Its aim is to find out how you evaluate Voith's economic, social and environmental impacts and where you see improvement potentials in terms of the company’s sustainability performance.

The Survey Questionnaire will take around 10 minutes to complete.

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