Page 15 of catalogue Bearing Technology for Rail Vehicles of Schaeffler Technologies GmbH & Co. KG

Axlebox Bearings with Integrated Generators Axlebox Bearings with Integrated Sensors
Axlebox Bearings with Integrated Generators If electricity is required in rail wagons, FAG axlebox bearings with integrated generators are the ideal solution. The Magnets in the axle cover rotate as a rotor when the wheel axle rotates, whereas the coils in the housing cover stand still and act as a stator. The electricity produced is stored in an accumulator and is also available when the vehicle is standing still. This means that it is possible, for example, for electronic data transmission systems with additional functions such as axlebox bearing diagnosis and hazardous materials monitoring to transfer data in shorter intervals thanks to a continuous supply of electricity. Two systems are currently available: A low-power design with 5 watts as well as a more powerful version with a continuous output of 100 watts. Customer-specific solutions, for example, for voltages from 6 to volts are also available. Installing the generator requires little outlay, since the housing cover and axle cover from a standard housing (UIC or Y5) are simply interchanged with the relevant parts with a fitted generator. Axlebox Bearings with Integrated Sensors Schaeffler Group Industrial’s engineers have developed an axlebox bearing unit with integrated sensors (bearing with sensors and housing) and optimized it to comply with the requirements of railway applications. The sensors reliably transmit information about speed to the wheel-slide protection and brake systems, speed indicators, and the automatic door-closing mechanisms. Continuous temperature measurements can be used to monitor the condition of the bearings. This enables any problems to be identified early on and rectified in sufficient time. Hot-running recognition systems are also part of the range of services on offer. The sensor system can also permanently generate the required rolling direction information for newly-developed train Control systems such as ERTMS/ETCS.

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