旋转接头机械密封端面开槽改进新技术

Improvement of End Face Grooving of Rotary Joint Mechanical Seal

针对船舶领域摩擦离合器中旋转接头密封压力损失过大导致离合器打滑等问题,提出了一种能降低压力损失的端面开V形槽的机械密封,能增强旋转接头的密封性能,确保旋转接头正常工作,能减少因旋转接头密封失效而造成的旋转机械故障。首先构建了旋转接头机械密封流场数值模型,然后利用搭建的旋转接头压力损失测试试验台对模型准确性进行了验证,最后对本文提出的端面开V形槽型、微坑型、圆弧形槽型等旋转接头机械密封进行了对比分析。研究结果表明:相对于原始的无槽旋转接头机械密封,V形槽型旋转接头机械密封的压力损失最大能减小约10%,微坑型旋转接头机械密封的压力损失最大增加约4%,圆弧形槽型旋转接头机械密封的压力损失最大增加约21%。

In order to solve the problem of clutch slip caused by excessive pressure loss of rotary joint seal in marine field,a me-chanical seal with V-shaped groove in end face which can reduce the pressure loss was proposed.This proposed seal can enhance the sealing performance of rotary joint,ensure the normal operation of rotary joint,and reduce the rotating machinery failure caused by the failure of rotary joint seal.In this research,the numerical model of the flow field of the rotary joint mechanical seal was firstly construc-ted,and then the accuracy of the model was verified by the pressure loss test bench of the rotary joint.Finally,the V-shaped groove type,micro-pit type and arc-shaped groove type of the rotary joint mechanical seal proposed in this research were compared and analyzed.The results show that compared with the original grooveless rotary joint mechanical seal,the pressure loss of the V-shaped groove type ro-tary joint mechanical seal can be reduced by about 10%,the pressure loss of the micro-pit type rotary joint mechanical seal can be in-creased by about 4%,and the pressure loss of the arc-shaped groove type rotary joint mechanical seal can be increased by about 21%.