中小型柴油机的机体2025/9/2chapter2柴油机的结构和主要部件
2025/9/2 chapter 2 柴油机的结构和主要部件 7 中小型柴油机的机体
The reasons for manufacturing the linerseparatelyTheliner canbe manufactured usingasuperiormaterialtothecylinder block. While the cylinder block is mode from a grey castiron,thelinerismanufacturedfromacastironalloyedwithchromium(铬)，vanadium（钒）andmolybdenum（钼）.（castiron contains graphite, a lubricant.The alloying elements helpresistcorrosionandimprovethewear resistanceathightemperatures.)The cylinder liner will ware with use, and therefore may have to be2replaced.ThecylinderiacketlaststhelifeofengineAtworkingtemperature,thelineris alothotterthantheiacket.3.The liner will expand more and is free to expand diametrically andlengthwise.IfTheywerecastasonepiece,thenunacceptablethermal stresses would be set up, causing facture of the material.Lessriskofdefects.Themore complexthecasting,themoredifficult to produce a homogenous(纯) casting withiow residualstresses.Pls translateabove!chapter2柴油机的结构和主要部件2025/9/2
2025/9/2 chapter 2 柴油机的结构和主要部件 8 The reasons for manufacturing the liner separately 1. The liner can be manufactured using a superior material to the cylinder block. While the cylinder block is mode from a grey cast iron, the liner is manufactured from a cast iron alloyed with chromium(铬), vanadium（钒） and molybdenum（钼）. (cast iron contains graphite, a lubricant. The alloying elements help resist corrosion and improve the wear resistance at high temperatures.) 2. The cylinder liner will ware with use, and therefore may have to be replaced. The cylinder jacket lasts the life of engine. 3. At working temperature, the liner is a lot hotter than the jacket. The liner will expand more and is free to expand diametrically and lengthwise. If They were cast as one piece, then unacceptable thermal stresses would be set up, causing facture of the material. 4. Less risk of defects. The more complex the casting, the more difficult to produce a homogenous(纯) casting with low residual stresses. Pls translate above!
2.2.3气缸（Cylinder）气缸的功用气缸工作条件气缸套的要求及材料气缸套的结构形式chapter2柴油机的结构和主要部件2025/9/2
2025/9/2 chapter 2 柴油机的结构和主要部件 9 2.2.3 气缸（Cylinder） ◼ 气缸的功用 ◼ 气缸工作条件 ◼ 气缸套的要求及材料 ◼ 气缸套的结构形式
气缸的功用及工作条件气缸套的功用①与缸盖、活塞共同构成气缸工作空间：筒形活塞柴油机的气缸套承受活塞侧推力，成为20活塞往复运动的导程；③将活塞组件及本身的热量传给冷却水，使之工作温度适当：4二冲程柴油机的气缸套布置有气口，由活塞启闭实现配气。102025/9/2chapter2柴油机的结构和主要部件
2025/9/2 chapter 2 柴油机的结构和主要部件 10 气缸的功用及工作条件 ◼ 气缸套的功用 ①与缸盖、活塞共同构成气缸工作空间； ②筒形活塞柴油机的气缸套承受活塞侧推力，成为 活塞往复运动的导程； ③将活塞组件及本身的热量传给冷却水，使之工作 温度适当； ④二冲程柴油机的气缸套布置有气口，由活塞启闭， 实现配气
2.2.3气缸（Cylinder）气缸的功用气缸工作条件气缸套的要求及材料气缸套的结构形式chapter2柴油机的结构和主要部件112025/9/2
2025/9/2 chapter 2 柴油机的结构和主要部件 11 2.2.3 气缸（Cylinder） ◼ 气缸的功用 ◼ 气缸工作条件 ◼ 气缸套的要求及材料 ◼ 气缸套的结构形式