Hydrodynamic Torque Converter Type EL - Voith Turbo

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Design and Applications Design The EL type torque converter is a fully self supported unit. The rotating parts are supported in the closed, oil tight housing. Main motor and driven machine are connected to the torque converter via connecting couplings. The oil tank is integrated into the cast iron housing, the oil pump is Controls and guide vane adjustment driven by the input shaft, providing the working and lube oil. The shafts are supported in anti-friction bearings. Guide vanes Pump wheel Turbine wheel The adjustable guide vanes can be controlled by a pneumatic, hydraulic or electric actuator, which receives an input signal of 4 – 20 mA or 0.2 – 1 bar from the customer‘s master control system. The feedback signal, to incorporate the torque converter in a closed control loop, can be provided by switches or as a 4 – 20 mA signal. Guide vanes closed (L x = 0%) Guide vanes max. opened (L x = 100%) Input Torque / Speed Characteristics L x = 100% L x = 75% L x = 50% L x = 25% L x = 0%
Applications The torque converters of this series are variable-speed drives, especially developed for electric motors with constant speed (squirrel cage or induction motors) or diesel engines with limited regulating range. With the adjustable guide vanes, speed and torque can be controlled within a wide operating range. The unload- Output Torque / Speed Characteristics L x = Guide vane setting T P = Input torque T T = Output torque n P = Input speed n T = Output speed 1 Torque converter 2 Shaft driven gear pump 3 Pressure relief valve 4 Heat exchanger 5 Oil fi lter 6 Orifi ce ed motor start allows a smooth and controlled start of the driven machine. These torque converters are mainly used on constant torque applications e.g. displacer machines, working against a constant pressure at low and high speed settings, like reciprocating pumps, screw pumps or compressors as well as agitators, Simplifi ed longitudinal section of torque converter 1 7 5 3 2 4 6 P & I Diagram Power chart 9 8 1 Input shaft 2 Pump wheel 3 Turbine wheel 4 Output shaft 5 Adjustable guide vanes Converter input power P 1 [kW] 2000 1000 600 400 200 100 60 40 20 mixers, extruders or winches. The hydrodynamic principle of the torque converter provides a natural overload protection of the motor and the driven machine by dampening torque spikes, which increase the lifetime of the entire drive train. 6 Guide vane adjustment mechanism 7 Gear pump 8 Pressure relief valve 9 Oil reservoir EL 10 EL 9 EL 8 EL 7 EL 6 EL 5 EL 4 EL 3 10 700 1000 1500 2000 2500 3000 Converter input speed n1 [rpm] 5
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Hydrodynamic Torque Converter Type EL - Voith Turbo

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