基于某增压发动机缸体缸盖密封性能研究  

Cylinder block & head performance Research of a turbocharged engine

作　　者：张龙 谈健 胡昌良 

机构地区：[1]安徽江淮汽车集团股份有限公司,安徽合肥230601

出　　处：《汽车实用技术》2017年第15期66-69,共4页Automobile Applied Technology

摘　　要：文章利用发动机缸垫压缩特性试验数据对标Gasket单元压缩曲线,模拟发动机缸体缸盖在高温燃料气体爆炸产生的交变热载荷工况下的密封性能,并得到如下主要结论:1)发动机缸垫上缸口筋面压的最小值分布于发动机二缸附近,燃料气体爆炸瞬间其面压值最小,但仍满足设计面压限值;2)发动机缸垫在交变热载荷作用下其压缩变形最大值为28微米,满足设计要求;3)在交变热载荷作用下,缸孔热变形直接影响发动机密封性能,缸孔深度10-30mm的进排气位置的变形量大于其他位置,且失圆形式为外扩,四个缸孔截面的傅立叶变换后2-8阶变形量均未超过设计变形限值。In This paper, compression characteristic test data of anengine cylinder Gasket wascompared with Gasket unit＇s standard compression curve. This technique was usually used to simulate their sealing performance,especially the cylinder block and head werein an atrocious environment which resulted from recurrent exposion of high temperature fuel gas, and recurrent explosion cause recurrent load. This paper taking the method get the following results： Firstly, the minimum surface pressure of the cylindergasket locate neat the combustioncylinderof Number two when fuel gasexplode, and the minimum pressure satisfies design requirement. Secondly, maximum compression deformationofthe gasket 28 π m which satisfies design requirement. Thirdly, under the recurrent load, deformation of cylinder-holeinfluencesgasketsealing performance directly. The displacement of intake and exhaust valve position, and more accurately locating at the cylinder depth 10-30mm,was greater than the other position, and the form of roundness-loss was outspread, 2-8 degree deformation after Fourier transform of four cylinder holes section Were under the design distortion limit.

关 键 词：Gasket单元 密封性能 缸孔变形 失圆度 气体爆发压力 

分 类 号：U462.1[机械工程—车辆工程]