STUDY ON EFFECT OF QUENCHING DEPTH ON FATIGUE LIFE OF OIL GROOVE IN THREE ROW COLUMN VARIABLE PITCH BEARINGS FOR WIND POWER

Wang Jinke; Du Jing; Han Jia; Wang Shuang

doi:10.19912/j.0254-0096.tynxb.2025-0413

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (7) : 205-211. DOI: 10.19912/j.0254-0096.tynxb.2025-0413

STUDY ON EFFECT OF QUENCHING DEPTH ON FATIGUE LIFE OF OIL GROOVE IN THREE ROW COLUMN VARIABLE PITCH BEARINGS FOR WIND POWER

Wang Jinke¹, Du Jing¹, Han Jia², Wang Shuang¹

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Abstract

To meet the comprehensive operating requirements of wind turbine bearings, this study develops a nonlinear spring-global finite element coupling model to analyze the dynamic load distribution. A raceway-oil groove sub-model is employed to accurately characterize the effect of case hardening depth on the stress field of oil grooves. Furthermore, a method for determining the critical threshold of case hardening depth for oil grooves is proposed. The results indicate that the equivalent stress of the oil groove in wind turbine pitch bearings decreases exponentially with increasing case hardening depth, while the fatigue damage exhibits a two-stage pattern of steep decline followed by gradual stabilization. Considering the high reliability and manufacturing economy of wind power equipment, the minimum case hardening depth for the oil groove is determined to be no less than 3.08 mm.

Key words

wind turbines / bearings / finite element analysis / fatigue life / wind turbine bearing oil groove / quenching depth

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Wang Jinke, Du Jing, Han Jia, Wang Shuang. STUDY ON EFFECT OF QUENCHING DEPTH ON FATIGUE LIFE OF OIL GROOVE IN THREE ROW COLUMN VARIABLE PITCH BEARINGS FOR WIND POWER[J]. Acta Energiae Solaris Sinica. 2026, 47(7): 205-211 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0413

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