of the cylinder liner, the cylinder liner for short, is set in a cylindrical part inside the cylinder, pressed and fixed by the cylinder head above, the piston and cylinder head together form a combustion chamber. .
Characteristics of the cylinder liner 1
1, high temperature, high pressure;
2, good abrasion resistance;
3, the inner surface of a suitable hardness, the hardness of the piston ring match;
4, the inner surface has a certain roughness, oil reservoir and to play the role of running;
5, the inner surface having a sufficient precision roundness and cylindricity, mounting support facing the central bore has high positional accuracy;
6, good lubrication and cooling support its work;
2. The effect of the cylinder liner
1. And cylinder head, cylinder piston together constitute the working space.
2. A trunk piston diesel engine cylinder liner receiving side thrust of the piston, the piston reciprocates becomes the lead.
3. The piston assembly and the heat transmitted to the cooling water itself, so that the proper operating temperature.
4. Two-stroke diesel engine cylinder liner disposed port, opening and closing by the piston, to achieve valve.
3. Classification of the cylinder liner
a, dry type cylinder liner
That structure is not in contact with the cooling liquid, thick-walled, the inner and outer go through the finished surface, to ensure the necessary accuracy and ease of disassembly bit type.
Advantages: small cylinder center distance, light weight, high stiffness body, simple process. Disadvantages: the heat transfer is poor, uneven temperature distribution, local deformation easily occurs.
Second, the moisture liner Formula
structure that is in direct contact with the cooling fluid, the wall thickness of 5 ~ 8mm, radially positioned by the vertical positioning of the endless belt, axial positioning cylinder liner by the top portion of the body corresponding flangeWith the realization of the support surface.
Advantages: easy to cast, because the body is not sealed water jacket; heat transfer performance, more uniform temperature distribution, enables fast, easy to repair. The disadvantage is that the body rigidity difference, easy to leak.
Third, without the cylinder liner of formula
None of the cylinder liner type cylinder block, by definition, that the body is no structure of the cylinder liner in the body directly machined cylinder.
Advantages: a cylinder center distance can be shortened, reducing the size and weight of the body. Disadvantages: poor economy and high cost.
As part of the engine block, we need to understand the basis of the performance of the engine, pay attention to the maintenance of the cylinder liner, use a suitable oil, and pay attention to seasonal variations choosing the right lubricant, but also pay attention check the quantity and quality of lubricating oil, lubricating oil to prevent deterioration. Strengthen the ldquo; three filter rdquo; maintenance is to prevent mechanical impurities into the cylinder to reduce cylinder wear and extend engine life of an important measure.