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Advanced Engineering 2020

NEC, Birmingham(B40 1NT)

04/11/2020 - 05/11/2020

The UK's largest annual advanced manufacturing trade show, Advanced Engineering is your opportunity to (more)

Drives & Controls Exhibition

NEC, Birmingham(B40 1NT)

25/01/2021 - 27/01/2021

The show brings together key suppliers of state-of-the-art equipment representing the multi-tasking culture (more)

A fresh breeze for gears

A fresh breeze for gears In wind power stations both fluid (lubricating oils) and consistent (lubricating greases) lubricants are used. The main task of the lubricant is to ensure reliable operation of the machine elements. Important lubrication points in wind turbines are in the main gear drive, the yaw system gear, the main and generator bearing, the pitch adjustment unit and the nacelle slewing ring. High demands are made on service life, load-carrying capacity and thermal resistance. All these characteristics should be maintained over an extended period of time. Therefore, plant operators require prolonged oil service life and grease relubrication intervals. While the engine oil of a car is changed after 15,000 to 30,000km, which corresponds to an oil service life of 300 to 600 hours at an average speed of 50km/h, the gear oil in a wind turbine is changed after as many as 25,000 to 50,000 service hours. Commodity lubricants as defined by various standards cannot meet the expectations of today's wind industry. The ever increasing performance requirements made on wind turbine gears have led to higher loads and temperatures in a smaller space. Therefore, nowadays the main gearboxes of wind turbines are generally lubricated with synthetic oils. In this context, it needs to be observed that different base oils (polyalphaolefin, polyglycol or rapidly biodegradable ester) are used to formulate these gear oils. Experience gained with usual synthetic lubricants has shown, however, that even these products cannot always meet the high requirements made in terms of wear protection of rolling bearings, micro-pitting resistance, foam and residue formation. The global lubricant specialist Klüber Lubrication has made it its job to develop a new series of gear oils which fulfil the operators' demands for synthetic products with different base oils and eliminate the weak points of existing lubricants. After having gone through numerous development stages and extensive performance tests, three synthetic high-performance gear oil series are now available.

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