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1、附录 专业英语翻译 Study of Dry Thin Wall Cylinder Liner forDiesel Enginecylinder Block Bore andCylinder Bore MachiningFirst chapter outline1.1 air cylinders attritionJudges the engine whether needs the overhaul, mainly is decided by the air cylinder wearing capacity, the air cylinder air ram group attrition
2、 hasHas the grinding compound to wear, the molecular machinery wears, corrodes the characteristic which - the machinery wears. In air cylinder working condition bad:Temperature high, pressure high, if oil feed insufficiency or lubrication condition bad, is easy to form the boundary friction, causesD
3、o not select has the metallic contact, forms the adherency. The hot adherency repairs a vehicle the initial period operational phase in new Che Heda to be easy to produce.In order to resist the hot adherency, must enhance the components the manufacture and the assembly quality and the lubricating oi
4、l quality.The cylinder body if coordinates the piston curl, in the attrition question is an inalienable whole, two has denseCuts relation. Generally besides special material, in two kind of mutual compounding ingredients one kind, if wearing capacity smallSpeech, then another kind of material wearin
5、g capacity also reduces along with it.Time the engine cylinder body manufacture precision and the assembly shape position common difference is remarkable to the cylinder wall attrition influence. In The manufacture and the overhaul are the strict control and the inspection air cylinder and the main
6、axle altar hole spool thread verticality, the air cylinder hole to the main bearingHole site, has the great significance to the engine service life. The cylinder wall attrition experiment proved that, When verticality errorIncreases to above 0.10mm when by 0.05mm, the cylinder wall wears correspondi
7、ngly increases 30-40%; Cylinder hole column errorAchieved when 0.04 mm, after exercises 20,000 kilometers, a cylinder hole column error increases to 0.10mm-0.12 mm.When an initial column error is smaller than 0.025 mm, after moves 20,000 kilometers, a cylinder hole column error only increases0.05 mm
8、 -0.06 mm.1. 2 cylinder walls surfaces appearanceThe cylinder wall forms the overlapping shape groove by to improve rubs the vice- lubrication condition is reduces the attrition the important link. EvenGoes against the net grain honing to be possible to cause the cylinder wall surface to present the
9、 clearly discernible overlapping net grain trench, and groove crest honingHas the microscopic plane, causes the flat topping area to account for the total area about 60%, like this may enhance the cylinder wall the oil storage ability,Causes the cylinder wall the wearing capacity to compare the non-
10、 flat topping network grain honing the cylinder tube to reduce about 78%. The use indicated that, carries on the flat topThe net grain honing, after the engine exercises 100,000 kilometers, still obviously net grain trench.The cylinder wall processing quality to its attrition influence remarkable, t
11、he rough surface is easy to destroy the lubricant film continuity;Is not easy in the smooth surface to preserve the lubricating oil. Under the certain working condition, the air cylinder wearing capacity if is roughHas the certain relations, therefore must reasonably choose the surface roughness. Th
12、e material indicated, for prevented pulls the cylinder, by all means mustThe maintenance lubricant film, the cylinder wall and the piston curl surface roughness must fully control. The Japanese material believed, cylinder wall surfaceRoughness take 0.3 mu m as suitable, its superficial honing trace
13、should form the oil storage surface. The French material believed,Regarding the linear precision work, should use 0.5-1.25 mu m the roughness. Regarding industry in application model cast iron,The cylinder wall surface do not have too to be smooth, otherwise can hinder to wear in; But the too rough
14、surface can cause the attrition increase.Therefore usually takes between 0.5-1.0 mu m, after wears in, surface roughness between 0.12-0.15 mu m.The modern motor car engine takes in the cylinder tube extremely in the enhancement wear-resisting life aspect the grinding compound attrition. Experimental
15、 tableBright, the cylinder wall total wearing capacity one about the half is the grinding compound wears to. Eliminates enhances the engine the filtration system functionOutside, in the assembly line ships out the engine usually has the massive grinding compound granule, is wearing in the initial pe
16、riod, causes the attritionSharp growth. The material indicated that, the engine installs to the automobile on, at first in 100-200 kilometer travelling schedule, in lubricating oilContains the silicon quantity to be most. Therefore does well the engine 清洁度, to guarantees the engine quality, the reliability all has the significanceSignificance.1.3 cylinder bodies distortionsThe cylinder body possibly
