航空发动机高压止推轴承腔密封分析及保证

Seal Analysis and Guarantee of Aeroengine High-Pressure Thrust Bearing Chamber

针对在外场使用和台架试车中多次出现高压止推轴承腔密封失效故障,结合高压止推轴承腔滑油系统工作原理、密封结构和装配工艺特点,对高压止推轴承腔密封失效故障进行机理分析,结果表明:严格控制篦齿和涨圈滑油密封尺寸、量化密封剂稀释配比、明确密封剂涂覆和紧固件拧紧要求、加强装配难点部位控制,可提高高压止推轴承腔的密封可靠性。

In the view of the multiple occurrences of the seal failure trouble of high-pressure thrust bearing chamber in out-field and running, combining with the working principle of high-pressure thrust bearing chamber oil system. sealing structure and the feature of assembly technology, with mechanism analysis of the seal failure of high-pressure thrust bearing chambei; the results show that strict control of the oil seal size of labyrinth and piston ring, quantizing the dilution ratio of seal agent, clarifying the requirement of seal coating agents and the tightening of fasteners, reinforcing the control of thc difficult parts assembly can improve the seal rel lability of high-pressure thrust bearing chamber.