Wind turbine main shaft bearings are one of the core spare parts of wind turbines. Their service life is related to the life of the entire wind turbine. Once it fails, replacement is very difficult and expensive. At present, the main shaft bearings of MW-class wind turbines adopt double-row spherical roller bearings, which are subjected to axial and radial loads at the same time. The advantage is that they are adaptable to the deflection of the main shaft and will not be stuck. The lubrication effect of wind turbine main shaft bearings is critical to their service life. At present, there are two main lubrication methods for wind turbine main shaft bearings: grease lubrication and lubricating oil lubrication, in which grease lubrication accounts for a relatively high proportion, and it is suitable for independent main bearing housings mounted on the machine base. The choice of grease is very important due to the difficulty in replacing the grease of the wind turbine main shaft bearings and the operation at extremely low ambient temperatures. Based on the above lubrication requirements, we have selected Mobil SHC Grease 460WT Synthetic Grease (produced by ExxonMobil), a synthetic grease product specially developed for wind turbine bearings with long life and good low temperature performance. It can provide good lubrication protection for wind turbine spindle bearings at -40 °C ambient temperature. The following is an example of the field case handled by our company to explain the principle of lubricating grease lubrication for wind turbine main shaft bearings. Background description: On September 2, 2011, a wind turbine manufacturer hosted a conference on the commissioning and follow-up of 3.0MW spindle bearings. The meeting mentioned that the roller bearings on the shaft of the windmill used in a wind farm were not greased. Worried about the impact of the lubrication of the spindle bearings, and hope that the Wazhou axis technicians go to the wind farm to view the analysis. On-site observation: The wind turbine started running on May 3, 2011 (total running time of 4 months). On September 7th, 2011, we went to the wind turbine site together with the wind turbine manufacturer to check the roller lubrication situation. Four main bearing seal end baffles were removed on site, and the main bearing roller lubrication was carried out. Observation and analysis. Observing the phenomenon: There is little grease in the cavity above the spindle bearing, grease on the inner ring of the bearing, and the red grease on the non-working surface visible on the roller, but no red grease in the local area of ​​the working surface (Mobil SHC Grease 460 WT is red) Grease), touched by hand in the area where there is no red grease on the surface of the roller, and it feels a sticky colorless oil film. Practical Floor Lamp ,White Floor Lamp,Floor Lamps For Bedroom,Dimmable Floor Lamp Zhongshan Seekyo Lighting CO., Ltd. , https://www.seekyomodernlamp.com
Wind turbine main shaft bearings are one of the core spare parts of wind turbines. Their service life is related to the life of the entire wind turbine. Once it fails, replacement is very difficult and expensive. At present, the main shaft bearings of MW-class wind turbines adopt double-row aligning rolls.