Wind Turbine Maintenance

A wind turbine is a comprehensive product integrating electrical, mechanical, aerodynamics, and other disciplines, and all parts are closely related and closely related. The quality of wind turbine maintenance directly affects the amount of power generation and the level of economic benefits; the performance of the wind turbine itself must be maintained through maintenance and repair. The timely and effective maintenance work can find hidden faults, reduce the occurrence of faults, and improve fan efficiency.Fan maintenance can be divided into two ways: regular maintenance and daily troubleshooting.

Regular maintenance of the fan

Regular maintenance can keep the equipment in the best condition and prolong the service life of the fan. The main contents of regular inspection and maintenance work include bolt torque inspection (including electrical connection) between fan couplings, lubrication between various transmission components, and various functional tests.
When the fan is in normal operation, the bolts of each connecting component run in the resultant force of various vibrations for a long time, and it is easy to loosen them. Check the bolt torque. When the ambient temperature is lower than -5°C, the torque should be reduced to 80% of the rated torque for tightening, and the recheck should be performed when the temperature is higher than -5°C. Generally, the tightening inspection of the bolts is arranged in the summer with no wind or little wind to avoid the high output season of the fan.
Lubrication system parts of the fan mainly has two methods: thin oil lubrication (or mineral oil lubrication) and dry oil lubrication (or grease lubrication). The gearbox and yaw reduction gearbox of the fan is lubricated with thin oil. The maintenance method is to add and sample test. If the test result shows that the lubricating oil can no longer be used, it should be replaced. Dry oil lubricated components include generator bearings, yaw bearings, yaw teeth, etc. Due to the high operating temperature, these components are highly susceptible to deterioration, causing bearing wear, and must be replenished each time during regular maintenance. In addition, the supplementary dose of the generator bearing must be added according to the required amount, not too much, to prevent too much from being squeezed into the motor winding and causing the motor to burn out.
The function tests of regular maintenance mainly include Overspeed test, emergency shutdown test, fixed value test of each component of the hydraulic system, vibration switch test, and twist cable switch test. It is also possible to perform some routine tests on the limit settings of the controller.
In addition to the above three items, regular maintenance should also check the hydraulic oil level, whether each sensor is damaged, whether the power supply of the sensor works reliably, and the wear of brake pads and brake discs.

Daily troubleshooting and maintenance

During the operation of the fan, there will also be some faults that must be dealt with on-site.
First of all, carefully observe whether the safety platform and ladder in the fan are firm, whether there are loose connecting bolts, whether there is a sticky smell in the control cabinet, whether the cables are displaced, whether the splint is loose, whether the pull ring of the twist cable sensor is worn and broken, and the yaw tooth Whether the lubrication is dry and deteriorated, whether the yaw gearbox, hydraulic oil and the oil level of the gearbox are normal, whether the gauge pressure of the hydraulic station is normal, whether there is wear between the rotating parts and the rotating parts, whether there is leakage of each oil pipe joint, and whether the gear Whether the indication of oil and hydraulic oil filter is in normal position, etc.
The second is to listen to see if there is a discharge sound in the control cabinet. If there is a sound, there may be loose wiring terminals or poor contact. It must be carefully checked to see if the sound during yaw is normal and whether there is a dry grinding sound. Check whether there is any abnormal noise in the bearing of the generator, whether there is any abnormal noise in the gearbox, whether there is any abnormal noise between the brake disc and the brake pad, and whether the wind cutting sound of the blade is normal.
Third, clean up your work site, and wipe down all components and pipe joints of the hydraulic station, to observe whether there is any leakage in the future.

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