EagleBurgmann international
EagleBurgmann WORLDWIDE
With around 250 locations and 90 serve centers, we are represented in the most important economic regions of the world. The advantages are clear: short paths to our customers, fast response times and a shared language.
EagleBurgmann Espey
Gears
Gears, drives, couplings, bearings or shafts with universal joints, having a wide range of different designs, are used in almost every branch of industry. Delicate components, such as the stators of electrical converters or complex mechanical seals require barrier seals in order to guarantee their functionality. Espey® carbon floating ring seals from EagleBurgmann Espey have proven their effectiveness as barrier seals for decades. Their robustness and long service life are impressive, and they offer a long-lasting, secure seal under any operating conditions.
Application example: Sealing an oil-lubricated rotor bearing
Issue and challenge:
In some countries such as Sweden and north-eastern Germany, distributed mobile converter units employ rotating converters to change three phase power drawn from the public network into single-phase AC for use as railway traction power. In these areas, there are no dedicated power lines to feed power to the railway network. The converters are mounted in a fixed position on a wagon, which allows a substitute converter to be used when they need repair or replacement. The converter consists of a motor and a generator. The bearing at one end of the generator rotor can move axially. The bearing is lubricated by oil. The fan wheels needed for cooling at both ends of the rotor develop a vacuum that sucks the bearing oil into the stator and into the rotor contained within it. An easily fitted, short bearing seal with leakage removal is needed here to prevent the stator and rotor from getting oiled up.
Solution from EagleBurgmann Espey:
The operator of the rail power converter unit trusted the Espey® WD500 Special with leakage removal to prevent the stator and rotor becoming oiled up. The seal is designed for a temperature of 60 °C (140 °F), a pressure of 0.9 bar (13.05 PSI) and a rotation speed of 500 rpm. Thanks to the split casing it is easily mounted, and is only 50 mm (1.97 ”) long. The oil that seeps in as a result of the vacuum is trapped in a leakage collection vessel, and is removed from time to time. The seal solution has a long service life, is maintenance-free, and compensates for shaft movements.
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