ÏThere are many reasons for wind turbine failures during operation, and the locations of the failures may vary. The failures may be caused by problems with the wind turbine itself, the air duct system of the wind turbine, or problems with the motor. The malfunction of the wind turbine is closely related to the quality of manufacturing, installation process, maintenance level, and whether the operation and maintenance plan meet the requirements. Below are some common faults and their solutions for wind turbines.

1. Excessive Wind Turbine Vibration

Cause

Solution

Impeller dust accumulation

Clean the accumulated dust

Counterweight in wrong position

Perform dynamic balancing again

Severe impeller wear

Repair or replace the impeller

Rotor imbalance

Perform dynamic balancing again

Coupling misaligned, causing poor main shaft alignment

Realign the shaft

Shaft thermal expansion not considered during installation

Readjust and leave allowance for expansion

Insufficient foundation stiffness

Patch and reinforce as appropriate

Loose connecting bolts

Tighten the bolts

Insufficient base stiffness

Reinforce as appropriate

Long shutdown without shaft barring

Bar the shaft (rotate periodically)

Insufficient design stiffness

Improve the design

Hub rubbing against the seal disc

Adjust the installation position of the seal disc

Impeller rubbing against the casing

Reinstall and adjust

Impeller rubbing against the inlet ring

Readjust the position of the inlet ring

Damper door accidentally closed

Open the damper door

System resistance too high

Investigate the cause of high resistance and reduce it

Improper operation

Operate the wind turbine correctly

Poor lubrication

Check the function of the oil station

Bearing damage

Replace the bearing

Vibration sensor fault

Calibrate the sensor; replace any unqualified sensor

Signal interference

Use shielded cables to avoid signal interference

2. High wind turbine Bearing Temperature

Cause

Solution

Insufficient lubricating oil

Check the oil station and adjust flow to meet requirements

Lubricating oil temperature too high

Check whether the cooling water system and cooler work properly

Poor-quality lubricating oil or grease

Oil/grease used for too long — replace and periodically test the oil/grease

Bearing fault

Same as above

Temperature sensor fault

Calibrate the sensor; replace any unqualified sensor

3. wind turbine Performance Fault

Symptom

Cause

Solution

Pressure too high, flow reduced

wind turbine rotating in wrong direction

Reverse the rotation direction


Gas temperature too low

Raise the gas temperature


Inlet/outlet duct blocked

Clear the blockage


Actual system resistance too high

Take measures to reduce system resistance


Wrong wind turbine selection

Reselect the wind turbine

Pressure too low, flow increased

Gas temperature too high

Lower the gas temperature


Inlet duct air leakage

Repair the duct


Actual system resistance too low

Reselect based on the new system resistance

wind turbine output reduced

wind turbine speed decreased

Increase the wind turbine speed


Severe wind turbine wear

Replace the impeller


Wind turbine operating in the stall zone

Adjust the wind turbine operating point

4. High Wind Turbine Noise

Cause

Solution

No sound insulation on the wind turbine

Add sound insulation

Degraded silencer performance

Clean or replace the silencer elements

Wind turbine operating in the surge zone

Adjust the wind turbine operating point

Loose duct or wind turbine components

Check and tighten

Duct suddenly expands or contracts

Redesign the duct in accordance with relevant regulations

Internal rotating parts rubbing against static parts

Adjust the installation to avoid friction

5. Motor Current Over Limit

Cause

Solution

Wind turbine speed too high

Reduce the wind turbine speed

Backward-curved impeller installed backwards

Change the impeller installation direction

Actual system resistance too low

Reselect based on the new resistance

Gas density too high

Adjust gas temperature to the design value

Inspection door not closed

Close the inspection door

Wrong wind turbine selection

Reselect the wind turbine

6. Wind turbine Cannot Be Adjusted

Cause

Solution

Actuator fault

Inspect and troubleshoot

Linkage fault

Check whether the linkage is disconnected

Blade rusted and stuck

Clean the corroded parts

Damaged parts inside the hub

Inspect and replace

Hydraulic cylinder fault

Repair or replace the hydraulic cylinder

Insufficient hydraulic station oil pressure

Check whether the pump works and whether the hydraulic oil line leaks

7. Wind turbine Cannot Start

Cause

Solution

Power supply fault

Check the control cabinet settings, voltage, etc.

Current protection limit exceeded

Change the settings

Duct damper door in wrong position

Check the damper door position

Brake not released

Release the brake

Inlet regulating damper open

Close the inlet regulating damper when starting a centrifugal wind turbine

Blade angle open

Close the blades when starting a variable-pitch (pitch-regulated) wind turbine

Vibration exceeds the set value

Investigate the cause of high wind turbine vibration

2026 September 3rd Week FK Product Recommendation

Pillow Block:

A pillow block bearing (or plummer block) is a mounting used to support a rotating shaft with the use of bearings and various accessories. The assembly consists of a mounting block which houses a bearing. The block is mounted to a foundation, and a shaft is inserted, allowing the inner part of the bearing/shaft to rotate. The inside of the bearing is typically 0.025 millimetres (0.001 in) larger diameter than the shaft to ensure a tight fit. Set screws, locking collars, or set collars are commonly used to secure the shaft. Housing material for a pillow block is typically made of cast iron or cast steel.

https://www.fk-bearing.com/products/Pillow-Block/698.html

图片17.png