针对DMF11HZ型柴油机排气管接合部漏油引起冒烟以及DMF14HZ型和DMF14HZA型柴油机排气管 气缸盖接合部渗油问题 ,研制了带内套的波纹管式接头和改进型垫片。介绍了新的接头及垫片的结构、工作原理以及其良好的现场使用效果。新接头的开发不仅完全解决了漏油冒烟问题 ,而且还可防止原结构引起的排气管龟裂以及明显地降低发动机的噪声 In view of the smoke leakage caused by the oil leakage at the joint of DMF11HZ diesel engine and the oil leakage at the junction of cylinder head of DMF14HZ and DMF14HZA diesel engine exhaust pipe, a bellows-type joint with inner sleeve and an improved gasket were developed. The new joints and gaskets are introduced in terms of structure, working principle and good field performance. The development of the new joint not only completely solves the problem of oil leakage and smoke but also prevents the cracking of the exhaust pipe caused by the original structure and obviously reduces the noise of the engine