B柴油机培训教材(中英文).ppt

226B柴油机气缸套材料为耐磨的铜硼铸铁,内孔表面为耐磨的平台网纹结构，内孔尺寸φ105 0+0.022，其中直径φ105 0+0.011为A组，在外圆距上端面70mm处标记有绿点，直径φ105 +0.011+0.022为B组，在外圆距上端面70mm处标记有红点，A、B分组直径是在距上端面60mm处测量，测量值为2个相互垂直方向的平均值，且2次测量差值小于0.011mm。在距上端面0~200mm范围内测量，2个相互垂直方向的平均值在φ105 0+0.022范围内，且2次测量差值小于0.016mm。同一台柴油机所装配的气缸套分组必须一致。Cylinder liner material adopts wear-resisting copper boron cast iron, inner bore surface plateau honing cross hatch, inner bore diameter φ105 0+0.022. Group A diameter φ105 0+0.011, mark with green dot at 70mm of outer surface from upper end; Group B diameter φ105 +0.011+0.022 mark with red dot at 70mm of outer surface from upper end, the diameter is measured at 60mm from upper end, measured value is the average value of the two values measured in mutually vertical directions. the difference should be less than 0.011mm. Another value should be measure from top end 0-200mm, the average value φ105 0+0.022, the difference should be less than 0.016mm, the dividing group of cylinder liners in same engine must be in one group. 气缸盖：材料为HT280。单体式一缸一盖，五面加工体，体积比较小，内部水腔，气道紧凑，便于拆装维修。侧面碗型塞与气缸盖的过盈配合副φ25+0.052 0/+0.302 +0.218，气缸盖上部M22x1.5螺孔用ZM22x1.5锥堵密封，进排气门座采用液氮冷装技术装配，排气门座材料PL12MV425，硬度40~46HRC，与气缸盖的过盈配合副φ45+0.016 0/+0.113 +0.097，进气门座材料V581W，硬度35~50HRC，与气缸盖的过盈配合副φ48+0.016 0/+0.113 +0.097，进气门座与排气门接触面粗糙度RZ6（R0.5）。 Cylinder head: material HT280, one head per cylinder, five surface processome, small volume, with water cavity. compact air path, convenient to dismantle and maintain. Flank plug with cylinder head interference fit: φ25+0.052 0/+0.302 +0.218, cylinder head M22x1.5 screw sealed with ZM22x1.5 cone plug, intake and exhaust valve seats adopt hydraulic nitrogen cold assembly technique. exhaust valve seat material PL12MV425, rigidity 40~46HRC, interference fit with cylinder head φ45+0.016 0/+0.113 +0.097, inlet valve seat material V581W, rigidity 35~50HRC, interference fit with cylinder head φ48+0.016 0/+0.113 +0.097, roughness of interface between inlet valve seat and exhaust valve RZ6（R0.5）. 气门导管材料为HT2