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Voith Lightweight Gear Unit SE-369 with Aluminum Housing and Innovative Bionic Toothing - Voith has applied for a new patent on the optimization of gearwheels from a bionic aspect - Voith.com
Voith Lightweight Gear Unit SE-369 with Aluminum Housing and Innovative Bionic Toothing

 

NewswireToday - /newswire/ - Heidenheim, Germany, 2017/05/11 - Voith has applied for a new patent on the optimization of gearwheels from a bionic aspect - Voith.com. FSE: VO2A

   
 
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• Patent on optimized tooth root shows success;
• Narrower gearwheels are lighter by up to 10 percent, with the same loading capacity;
• Toothing is quieter.

The concept allows weight reductions of up to 10 percent or an increased power transmission capacity for the same space requirements and noise emissions.

Optimized Tooth Root Profile
The idea for the patent comes from observing the natural world - specifically trees. At their base where they meet the roots, they form transitions at the “sharp angle” between the tree trunk and the ground, creating a triangle with a curved hypotenuse that reduces stress. This allows trees to withstand the enormous force associated with strong winds. From this observation, the Voith engineers derived a bionic tooth root correction for gearwheels. Using a wider, profile-optimized tooth root, the tooth root strength is increased.

With gear units equipped with the bionic toothing, vehicle manufacturers and operators benefit in two different ways. The increased tooth root strength allows for a narrower design of the gearwheels. This reduces the gear unit weight and also saves valuable centimeters of installation space in the cramped bogie. However, if the entire width that would be necessary for a conventional gearwheel is available, noise emissions are reduced by up to 3 dBA. Smaller teeth are possible because of the increased tooth root strength. As a result, more teeth fit around the perimeter meaning more teeth mesh. The overlap is greater, which makes the gearwheel quieter.

Different material pairings for gear units with aluminum housings
Voith presented the aluminum version of the SE-369 gear unit at InnoTrans 2016. It was possible to reduce the weight by 25 percent over the conventional ductile cast iron version. For gear units with an aluminum housing, the challenge is the pairing of different materials with different coefficients of thermal expansion. Aluminum is used as the housing material and steel is the material for shafts, gears and bearings. Voith can predict the temperature behavior using a comprehensive simulation and then implement the structure accordingly.

The single-stage Voith SE-369 gear unit carries out its role in countless high-speed trains.Trains of the British Great Western Main Line as well as the East Coast Main Line are currently being equipped with these lightweight and smooth-running aluminum construction Voith gear units.

Voith Turbo, a Group Division of Voith GmbH (voith.com), is a specialist for intelligent drive solutions, systems and comprehensive services. Customers from highly diverse industries such as oil and gas, energy, rail and commercial vehicles, ship technology, mining and mechanical engineering rely on the advanced technologies and solutions-driven expertise of Voith Turbo.

For 150 years, Voith’s technologies have been inspiring customers, business partners and employees worldwide. Founded in 1867, Voith today has around 19,000 employees, sales of €4.3 billion and locations in more than 60 countries worldwide and is thus one of the largest familyowned companies in Europe. Being a technology leader, Voith sets standards in the markets of energy, oil & gas, paper, raw materials and transport & automotive.

 
 
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Written by / Agency / Source: Voith GmbH

 
 

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Voith Lightweight Gear Unit SE-369 with Aluminum Housing and Innovative Bionic Toothing

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SE-369 Gear Unit | Voith
Publisher Contact: Kathrin Röck - Voith.com 
+49 7321 37-6866 kathrin.roeck[.]voith.com
 
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