Contact load measurement of bearings based on smart roller

Aiming at the difficulty of measuring the contact load of tapered roller in the main bearing of wind turbine, the smart roller and strain gauge holder for measuring the contact load of the bearing are designed. Taking single-row tapered roller bearing as an example, firstly, a single roller-circle three-dimensional model is established, and a suitable hollow degree is selected. Then, the structure of the strain gauge bracket is designed according to the finite element analysis, and the measuring circuit inside the smart roller is designed. Finally, calibration experiments and static loading simulation experiments are carried out. The results show that the equivalent force change of the hollow roller with a hollow degree of 35% is small; the average measurement error of the designed smart roller is not more than 10% in the range of 0-3t.