According to the trends existing in modern energy, the number of alternative sources of its production is constantly growing. According to optimistic forecasts, by 2030 the share of renewable electricity will be at least 32%. This alignment is due to the urgency of environmental problems: harmful emissions into the atmosphere, global warming, etc.
Among renewable energy sources, an important place belongs to the wind. In one form or another, it was used by the inhabitants of Babylon, Egypt and China. Europeans began to master wind energy from the twelfth century. The first applications were quite simple – the grinding of grain, the drying of swamps and rice fields, but even then it was clear that such a natural phenomenon has good potential. Denmark began to use wind to produce electricity. In 1890, the launch of the first wind power station. Twenty years later, their total number around the world approached a hundred. As of 2012, there were 806,000 wind turbines.The popularity of wind energy is determined by a number of advantages: power generation already at wind speeds of 4-5 m / s, ecological cleanliness, renewability, work with an existing network of power plants or autonomously. The period of continuous operation of most modern wind turbines without maintenance is three years (30,000 hours).
This article discusses a number of issues related to the extension of the life of wind turbines:
- what the wind turbine oil is for;
- selection of gear oil;
- oil change in the gearbox;
- CMM-G gear oil changer unit;
- economic aspects of changing oil in wind turbine gearboxes.
The blades are designed to “capture” the wind and are mounted on the rotor. When the working speeds of the wind appear, the rotor transmits rotation to a low-speed shaft, which is connected to the transmission. Further, the rotational moment from the gearbox is transmitted through the high-speed shaft to the generator, where the conversion of mechanical energy into electrical energy takes place. To generate electricity, a relatively high shaft rotation speed (1000–2000 rpm) is required. It is not possible to get it directly, as the wind provides the speed of rotation of the low-speed shaft at a level of no more than 15–20 rpm. To increase the speed of rotation and gear is used. The assignment of the other parts of the wind turbines is as follows:
- the gondola performs the function of the hull in which the shafts, gearbox, alternator and brake are located;
- the tower (mast) is fastened to the base with one end, and the gondola is located at the other. Inside the tower there is a staircase, through which the attendants can access other parts of the wind turbine;
- the brake stops the rotor if critical wind speeds occur;