Voith Lightweight Gear Unit SE-369 with Aluminum Housing and Innovative Bionic Toothing
- Patent on optimized tooth root shows success
- Narrower gearwheels are lighter by up to 10 percent, with the
same loading capacity
- Toothing is quieter
- Zur Großansicht
- Voith presented the SE-369 gear unit with aluminum housing and an innovative
gear wheel with patented bionic toothing at InnoTrans 2016.
Heidenheim: Voith has applied for a new patent on the optimization of
gearwheels from a bionic aspect. 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
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, 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.
Press Release (2.16 MB)