Slewing Ring Selection for Wind Turbines
Slewing Ring Selection for Wind Turbines
(OP)
Hi all,
I am working on the slewing rings used in the pitch system of wind turbines.
We have calculated the tilting moments and axial loads for the following load cases:
- nominal operational condition
- maximum operational condition
- maximum downtime condition
- extreme condition
A service factor of about 2 is also suggested for wind turbine application. My question is: which of the above mentioned tilting moments/axial loads must be multiplied by the service factor? All of them? or only the operational moments/forces?
Thanks
I am working on the slewing rings used in the pitch system of wind turbines.
We have calculated the tilting moments and axial loads for the following load cases:
- nominal operational condition
- maximum operational condition
- maximum downtime condition
- extreme condition
A service factor of about 2 is also suggested for wind turbine application. My question is: which of the above mentioned tilting moments/axial loads must be multiplied by the service factor? All of them? or only the operational moments/forces?
Thanks





RE: Slewing Ring Selection for Wind Turbines
It usually is kind of confusing.
RE: Slewing Ring Selection for Wind Turbines
"2" sounds like an impact load ? ie dynamic effects;
but "service loads" sounds like a fatigue rule of thumb (ie if your structure is good to double the typical loads then it should have infinite life) ?
another day in paradise, or is paradise one day closer ?
RE: Slewing Ring Selection for Wind Turbines
RE: Slewing Ring Selection for Wind Turbines
On the other hand, in the catalog of many slewing ring manufacturers, they suggest service factors based on the application, but say nothing about which loads should be multiplied by their suggested service factor....
RE: Slewing Ring Selection for Wind Turbines