1 Answer ALL parts (a)-(d) The trend for wind turbines to grow in size has led to significant development in bearing des

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1 Answer All Parts A D The Trend For Wind Turbines To Grow In Size Has Led To Significant Development In Bearing Des 1 (132.43 KiB) Viewed 41 times

1 Answer ALL parts (a)-(d) The trend for wind turbines to grow in size has led to significant development in bearing design, not only to cope with increased loading, but as machines have moved offshore, they have necessitated the requirement to improve sealing and lubrication in an effort to extend machine bearing life to 25 years. (a) (b) (c) Describe, with the aid of diagrams the concept of friction and associated methods of energy dissipation. (7 marks) Explain how a lubricant benefits wind turbine machine design and how it can aid sustainability. Within you answer you should consider the entire lifecycle of the machine and associated economic impact. (7 marks) The main bearing of a wind turbine is designed to operate for 25 years at 90% reliability and during typical operation is subject to an equivalent dynamic load of 250 kN. If the turbine is subject to storm conditions that increase the equivalent dynamic load beyond the designated 250 kN, describe the impact you would expect this to have on bearing life and any operational strategies that might mitigate these conditions. (4 marks)