Five fully formulated wind turbine gear oils were selected and their physical and chemical properties characterised. All gear oils were ISO VG 320 grade with different base oils: mineral, ester, PAO, PAG and mineral+PAMA. A back-to-back FZG test machine with re-circulating power including a torque meter was used in order to measure the torque loss. Eight thermocouples were installed to monitor the temperatures in different locations on the machine. The torque values presented were measured at stabilized operating conditions. Tests were performed at 1.13, 2.26 and 6.79 m/s (pitch line velocity), for different FZG load stages: K1, K5, K7 and K9 (arm lever=0.35 m). Both gearboxes were jet-lubricated with an oil flow rate of 3 l/min. The oil flow input temperature was 80 ±1°C. A torque loss model was implemented to both test and drive gearboxes in order to predict the torque loss behaviour of the test machine. This model took into account the friction generated between meshing tooth, the shaft seals and rolling bearings.
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机译：选择了五种完全配制的风力涡轮机齿轮油，其物理和化学性质的特征。所有齿轮油都是ISO VG 320级，不同的基础油：矿物，酯，PAO，PAG和矿物+帕马。使用具有重新循环电源的背对背FZG试验机，以便测量扭矩损耗。安装了八个热电偶，以监控机器上不同位置的温度。呈现的扭矩值在稳定的操作条件下测量。测试在1.13,2.26和6.79 m / s（俯仰线速度）下进行，用于不同的Fzg载荷阶段：K1，K5，K7和K9（臂杆= 0.35米）。两个齿轮箱都被喷射润滑，油流量为3升/分钟。油流量输入温度为80±1°C。扭矩损耗模型用于测试和驱动齿轮箱，以预测测试机器的扭矩损耗行为。该模型考虑到啮合齿，轴密封和滚动轴承之间产生的摩擦。
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