风机主轴是连接风机风翅与风机底座的重要部件，风机主轴是中空的，风机主轴的材质是不锈钢的，内孔加工比较困难，对风机主轴的加工设备是深孔钻镗床，根据风机主轴的特性，深孔钻镗床要加高床头。风力发电机的主轴既有径向偏移，又有轴向偏移。实际上，主轴的轴向偏移直接传递到齿轮箱的输入轴。除非对调心滚子轴承的径向游隙，轴向游隙控制以及行星轮的定位做特别处理，否则轴向的偏移会对齿轮箱里行星架支撑轴承产生不利的影响。

主轴的轴向偏移取决于系统的刚性和固定端轴承的内部游隙。在固定端使用预紧的双列圆锥滚子轴承后，主轴右端的轴向偏移几乎比使用调心滚子轴承时减少4倍。减小轴向偏移可以减小轴向挤压齿轮箱输入轴的风险，这非常重要。

在一端固定、一端浮动的轴承布置情况下，固定端轴承（双列圆锥滚子轴承或调心滚子轴承）同时承受径向力和轴向力，而浮动端轴承（圆柱滚子轴承或调心滚子轴承）只承受径向力。因为轴向力作用方向是从转子端指向齿轮箱端的，因此不管是使用双列圆锥滚子轴承还是使用调心滚子轴承，只有靠近齿轮箱一端的一列滚子承受所有的轴向力。

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The main shaft of the fan is an important part connecting the fan wing and the fan base. The main shaft of the fan is hollow. The material of the main shaft of the fan is stainless steel. The machining of the inner hole is difficult. The processing equipment for the main shaft of the fan is a deep hole drilling and boring machine. Characteristics, deep hole drilling and boring machine to increase the bed. The main shaft of a wind turbine has both a radial offset and an axial offset. In fact, the axial offset of the spindle is transmitted directly to the input shaft of the gearbox. Unless the radial clearance of the spherical roller bearing, the axial clearance control and the positioning of the planet gear are specially treated, the axial offset will adversely affect the planet carrier support bearing in the gearbox.

The axial offset of the spindle depends on the rigidity of the system and the internal clearance of the fixed end bearing. When a pre-tightened double row tapered roller bearing is used at the fixed end, the axial offset at the right end of the spindle is almost four times less than when using a spherical roller bearing. Reducing the axial offset reduces the risk of axially squeezing the input shaft of the gearbox, which is very important.

In the case of a bearing arrangement with one end fixed and one end floating, the fixed end bearing (double row tapered roller bearing or spherical roller bearing) is subjected to both radial and axial forces, while the floating end bearing (cylindrical roller bearing or tune) Heart roller bearings) only withstand radial forces. Since the axial force is directed from the rotor end to the gearbox end, whether a double row tapered roller bearing or a spherical roller bearing is used, only one row of rollers near one end of the gearbox is subjected to all axial forces.