Hydrostatic Oriented Support Loading Technology of Large Wind Turbine Ground Test Bench

doi:10.3901/JME.260127

Abstract

Abstract: For the ground testing of large wind turbines, the load is applied to the rotating loading disk by the fixed hydraulic cylinder. The loading disk has displacement and rotation angles in spatial degrees-of-freedom, which lead to friction and collision to the loading process. A hydrostatic oriented support loading technology is proposed in this article. Based on the spatial attitude of the loading disk of a 20 MW wind turbine, the structure and the bearing characteristics of the hydrostatic oriented support are analyzed. The loading force vector of the hydraulic cylinder can be always perpendicular to the loading plane of the loading disk. The dry friction can be avoided and the power loss of wind torque reproduction is reduced. The dynamic characteristic model and the computational fluid dynamics(CFD) flow field simulation model are established. The dynamic responses of the oil film in the hydraulic loading process are analyzed. And the simulation results verify the pressure and flow velocity distribution characteristics of spherical and planar surfaces. The maximum stiffness value of the planar secondary oil film is 2 554 N/μm. At a deflection angle of 4°, the pressure difference only accounts for 1.63% of the maximum pressure. The results prove that there will be no excessive compression and lubrication failure under the ultimate loading force and angle. A test bench of the hydrostatic oriented support loading is conducted to measure the oil film thickness changes at different tilting angles, which verify the feasibility of the hydrostatic oriented loading technology.

Key words: wind turbine, hydraulic loading, hydrostatic support, oriented loading

CLC Number:

TM614

LI Danyang, LIN Yonggang, GU Yajing, LIU Hongwei, XU Zhiliang, FU Deyi. Hydrostatic Oriented Support Loading Technology of Large Wind Turbine Ground Test Bench[J]. Journal of Mechanical Engineering, 2026, 62(4): 309-317.

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