摘要
沟槽式密封衬套多用于转膛炮和埋头弹火炮,其密封性能直接影响弹丸初速和部分零件的强度校核,为了研究其密封性能影响因素,应用FLUENT软件对多种衬套结构进行仿真计算,以缝隙入口质量流量和缝隙区域平均压力作为评判依据,对比分析了沟槽位置、间距和尺寸对密封性能的影响。结果表明,沟槽越靠近缝隙入口,密封效果越好,在密封间隙为0.1 mm的情况下,截面尺寸为2.0 mm×2.7 mm的沟槽的密封效果要优于截面尺寸为3.0 mm×5.5 mm的沟槽,使沟槽远离缝隙入口或者适当增大沟槽尺寸均可以降低缝隙区域的平均压力。研究结果可以为沟槽式密封衬套的结构设计提供参考。
Groove-type sealing bushing is mostly used in revolving gun and CTA gun. Its sealing performance directly affects the muzzle velocity of the projectile and the strength check of some parts. In order to study the factors affecting the sealing performance, FLUENT software was used to simulate various bushing structures. The influences of position, spacing and size of groove on the sealing perfor-mance were compared and analyzed according to the mass flow rate of the gap inlet and the average pressure of the gap area. The results show that the closer the groove is to the gap inlet, the better the sea-ling effect is. In the case of a sealing gap being 0.1 mm, the sealing effect of a groove with a section size of 2.0 mm×2.7 mm is better than that of the goove with a section size of 3.0 mm×5.5 mm. The average pressure of the gap area can be reduced by removing the location of groove from the gap inlet or increasing the size of groove appropriately. The research results can provide references for the structural design of groove type sealing bushing.
作者
贾宸
戴劲松
王茂森
JIA Chen;DAI Jinsong;WANG Maosen(College of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China)
出处
《火炮发射与控制学报》
北大核心
2019年第3期29-33,49,共6页
Journal of Gun Launch & Control
