According to the experience of countries and regions with the earliest development of wind energy, generally after 3-5 years of operation, the transmission machinery part of wind turbine begins to enter a period of frequent failures, and the key components such as gear box begin to centralized problems of varying degrees.
This paper introduces and explains in detail the various pollution and harm of lubricating oil in gear box, which is the key part of the fan and also the part with high failure rate, and puts forward simple, economical and effective control solutions, which can be used as reference for power generation enterprises and equipment manufacturers to improve the utilization rate of power generation equipment and reduce the shutdown and maintenance cost.
The gearbox is the main transmission component of the wind turbine, which is used to increase the speed of the impeller.
At present, the main wind power gearbox manufacturers are Winergy, Hansen, Moventas, etc., our country's manufacturers are Nanjing high-speed Gearbox Factory, Chongqing Gearbox Factory, Dalian Heavy Industry Reducer Factory, etc.
Because the wind turbine is installed in remote, open, windy areas, such as Xinjiang, Inner Mongolia and coastal areas, the growth gear box working environment belongs to the change of high temperature, high humidity, and the fan is in a relatively remote area, maintenance or replacement cost is huge, so the design requirements of the gear box must have very high operating stability, reliability. Pollutants such as particulate matter, moisture and oxidation products have great harm to oil and equipment itself, which will greatly increase the risk of fatigue and wear failure of gears and bearings.
Once a gearbox needs to be serviced or replaced, the costs of servicing and fitting it can be prohibiting for both the plant and the owner, when coupled with the use of large equipment and the loss of power generation due to unestimated downtime.
Two, the main pollution of wind turbine gear lubricating oil: including particulate matter, water, and oxidation pollutants. AGMA(American Gearbox Manufacturers Association) and ISO/IEC(International Standards Committee/International Electrotechnical Association) standards have the same requirements for wind turbine gearbox lubricants.
Generally, a set of on-line filter is attached to the on-line lubrication system of the fan gear box, and the general filtration accuracy of this filter is mostly 10-50µm. In fact, although the online filter is very good to protect the lubrication system, and play a role in cleaning the oil system, but according to the experience of the owners of the wind field over the years and sampling detection, it can not fully meet the requirements of the fan gearbox on the cleanliness of the oil and the relevant standards. A large number of small particulate matter can not be effectively removed, which is a potential threat to the demanding fan gearbox.
