基于低速重载、长润滑线路的尾操纵轴承设计

Research on Design and Verification Technology of Tail-Operated Bearing Based on Low Speed,Heavy Load and Long Lubrication Line

某型直升机尾减速器的尾操纵轴承用于低速重载、长润滑线路的复杂工况环境。为满足直升机左倾、右倾等各种飞行姿态下尾操纵轴承的使用要求,创新性地提出一种滚动轴承的设计方法。基于润滑条件差、承受载荷大以及结构空间受限等客观因素,采用耐热性更好的高温轴承钢和球轴承结构,通过优化轴承内部结构参数匹配设计,突破了具有不小于1°倾斜角的双半外圈双列角接触球轴承设计技术,填补了国内低速重载、长润滑线路、内外环偏心条件下的双列球轴承的空白。

Aiming at the tail control bearing installed in the tail gear box of a certain type of helicopter in the complex working conditions of low speed and heavy load, long lubrication line, in order to meet the use of helicopter left-leaning, right-leaning and other flight attitude, this paper innovatively presents a design method of rolling bearing. Based on the objective factors such as poor lubrication condition, heavy load and limited structure space, the high temperature bearing steel and ball bearing structure with better heat resistance are adopted, and the matching design of internal structure parameters of the bearing is optimized, the design technology of double-row angular contact ball bearing with double half outer ring and no less than 1° inclined angle is broken through. In order to simulate the flight attitude, the limit capability verification method and durability verification method under unfavorable condition are designed, which are close to the real condition. The design of the bearing fills the blank of domestic double row ball bearings under the condition of low speed and heavy load,long lubrication line and eccentricity of inner and outer rings.