Spherical roller bearings which have been optimized to allow wind turbines to generate energy more efficiently and reliably. These bearings will make mounting significantly easier by combining a tapered roller bearing unit, with a direct flange mounting facility. A wind turbine and rolling bearings are subjected to operating conditions and dynamic loads from the forces of wind acting directly on the rotor bearing support in a wind turbine unit. A new compact and easy to mount bearing unit is on the market. The FAG flanged bearing unit allows the bearing to be safely supported due to the tight axial guidance of the rotor and and the large pressure angle. The bearing uses grease lubrication and seals, is supplied pre-made, and contains double row tapered roller bearing unit in the O arrangement. The outer ring is flange-mounted to the nacelle, the inner rings are flange-mounted to the rotor. The grease sensor is made to order to a specific type of grease and provides exact measurement of the water content, mechanical wear, as well as the temperature, and turbidity in the bearing support. This option is called the FAG GreaseCheck.
This unit is connected by a cable, syncs the information, measurements and transmits the findings as an analog signal. The central lubricating system via the control room receives the the signal from the grease sensor. Thus insuring the bearings are re-lubricated at greater quantities and shorter intervals to improve the condition of the grease. This process is done despite the damage of the seals and to protect the bearings from the damage of grease failure. This design by Schaeffler is a huge step forwards increasing the axial load carrying capacity and the operating life of the main bearings in wind turbines. It allows a smaller contact angle on the bearing row and a larger contact angle to be used. The improved load distribution has been developed from this production of lower contact pressures and little to no axial displacement.
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