屏蔽式核主泵避免了动密封问题，同时主泵中水润滑可倾瓦推力轴承有着尺寸大、推力盘转动惯量高、离心效应明显的特点。针对主泵中推力盘的结构特点及工况条件，基于有限元分析方法，建立考虑推力盘离心变形的可倾瓦推力轴承多场耦合计算模型。基于推力盘变形独立性探索了推力盘装配结构中两个关键间隙的设计参数：内轮毂端面与端面板直接接触，外套环与端面板之间留有间隙，屏蔽套与外套环之间应至少预留1.74 mm的间隙；探讨了推力盘装配结构对离心变形的影响：低转速下可倾瓦轴承可通过瓦块倾斜补偿推力盘变形，转速大于3 600 r/min时推力盘变形迅速增大，极大增加润滑失效可能性；分析计算了不同结构尺寸下离心变形对推力轴承工作性能的影响：飞轮内轮毂凸沿外径的合理尺寸范围为0.63～0.67 m。
宋智翔
,
刘莹
,
郭飞
,
刘向锋
,
王玉明
. 屏蔽式核主泵水润滑可倾瓦推力轴承推力盘的离心效应[J]. 机械工程学报, 2018
, 54(1)
: 127
-135
.
DOI: 10.3901/JME.2018.01.127
The canned pump avoids the problem of rotating seal. However, the tilting pad thrust bearings in the canned pump have a large size and moment of inertia, which leads to an obvious centrifugal inertia effect. A multi-field coupled numerical model of tilting pad thrust bearings is established based on the infinite element method. Two key values of assembly gaps in flywheel design are discussed. There should be at least 1.74 mm between the shield and the outer ring. The centrifugal deformations and corresponding performances of tilting pad thrust bearings of different sizes and speed are analyzed. The rotating speed should be controlled within 3 600 r/min. Finally, the outer diameter of inner hub of flywheel is discussed and the optimal value ranges from 0.63 to 0.67 m.
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