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The main shaft of a wind turbine is a critical component that ensures the normal operation of the turbine, and its axial displacement directly impacts its efficiency and safety. The inaccurate measurement of axial displacement may lead to severe issues such as shaft fractures, causing turbine shutdowns. Correcting measurement errors related to axia...
Citations
... There is no unified standard for the calculation method of contact stresses in specialized large-scale wind turbine main shaft bearings. When simulating an entire bearing imported into ANSYS 2023R1 software, convergence is rarely achieved [25,26]. A simple model for calculating the contact stress of the wind turbine main shaft bearing is proposed to address the problem of inconsistent calculation methods and difficulties in convergence [27,28]; based on the identified deficiencies and considering the operational characteristics, it is necessary to account for the probability of influence on the lifespan reaching 99% under alternating load conditions over the 20-year operating cycle of the wind turbine. ...
... The load between the inner and outer rings has the following relationship [26]: ...
Under alternating loads, the contact situation for self-aligning roller bearings in the main shaft of a wind turbine is complex. Few methodologies exist for calculating the contact stress of main shaft bearings. We propose a method for calculating the contact stress of main shaft bearings in wind turbines; by simulating alternating loads that affect the turbine’s lifespan with a probability of 99%, analyzing the operational characteristics of the bearings under these loads using the roller slice method, and establishing a load–displacement model, this model serves as the boundary condition for contact stress simulation. We present the approach for building a three-dimensional finite element simulation model of contact stress, followed by model validation. The findings reveal that the maximum stress within the spindle bearing is concentrated in the contact zone, taking on an elliptical configuration. The maximum contact stress, as computed by the proposed method, amounts to 1356.3 MPa, and the bearing’s load-bearing performance adequately fulfills the design requirements. A comparative analysis with the calculation results documented in the existing literature shows that the average discrepancies in the computed outcomes for the roller’s contact with the inner and outer rings are 2.55% and 2.48%, respectively, and this validates the high reliability of the proposed approach. The research conducted in this thesis can further enhance the credibility of the contact stress calculation method for large-scale wind turbine spindle bearings.
