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单选题
392.低压涡轮轴承腔为何有2个滚棒轴承?( ) Why the LP turbine shaft bearing chamber has two roller bearings?
A
此处周向载荷大 because the circular load is more than others.
B
最后的轴承只为封严 just only for seal.
C
与高、中压涡轮轴承腔对称 for symmetry with HP and MP turbine shaft.
答案解析
正确答案：B
解析：
题目解析
低压涡轮轴承腔为何有2个滚棒轴承?( ) Why the LP turbine shaft bearing chamber has two roller bearings?
答案: B. 最后的轴承只为封严 just only for seal.
解析: 低压涡轮轴承腔中的两个滚棒轴承的存在主要是为了提供密封。在这个位置，轴承的主要任务并不是承受大量的载荷，而是提供一个密封的环境，防止机油泄漏并保持润滑。因此，这两个轴承更多地起到封严的作用，确保涡轮轴与外部环境之间的隔离。
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