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Types and Technical Terms of The Cylinder liner

Data:2013/4/9    Hits:8567次

Types and Technical Terms of The Cylinder liner

Fitting Recommendation:

1.Wet cylinder

The location bores and particularly the running surfaces in the cylinder block must be

cleaned carefully and they must be undamaged. Corroded surfaces must be reworked

 

(used flange liners and outer diameter oversize liners). As this is done, make sure that 

 

the liners moves in easily and that they take up the correct position (the projecting

 

length of the liner must be in accordance with the regulations of the engine

 

manufacture). After the liner has been installed with the seat rings that belong to it.

 

(use slip agent), the cylinder diameter is to be checked particularly in the region of

 

seal rings so as to determine whether any deformation has been caused by pinched

 

sealing rings. Using the wrong sealing rings (wrong diameter/ wrong materials) can a

 

narrowing of the cylinder which can lead to engine damage.The cooling system

 

should be pressure tested after the liners have been installed so as to determine

 

whether there is any leakage before the engine is started.

 

2.Semi-finished cylinder liner

 

The surface which supports the flange must be vertical to the location bore and it must be 

 

sufficiently and evenly beveled. If the liner flange is unevenly supported it can tear off. After the 

 

installation of the liner, which is only semi-finished  in its inside diameter, this cylinder boring is

 

finely bored and then finished by honing until it has the specified dimensions or, in the case of

 

finely bored liner.It is only finished by honing (tolerance accordingly to DIN ISO H5). The surface of

 

the liner must be flush to the sealing surface of the cylinder block, if necessary,the block surface

 

and the liner must be finished by surface grinding.

 

3.Finished Cylinder liner

 

Before the liner is installed, the location bore in the cylinder block must be cleaned 

 

carefully and must be checked to ensure the accuracy of the dimensions and to 

 

determine whether any distortion has occurred. Out of center or damaged bores can 

 

be reworked for the installation of oversize liners. It is important for this that the 

 

locating bore is cylindrical, as this is what determines the geometrical shape of the 

 

inside of the pressed in, thin walled liner.

 

4.Air cooling cylinder liner

 

In accordance with the instructions from the engine manufacture, cast iron cylinders 

 

or light alloy cylinders are used. Light alloy cylinders are separated into several groups 

 

due to the small installation clearance in the standard cylinder dimensions

 

Cylinder liner material:

 

Chemical Compositions (%)

CODE

Boron Cast Iron

C

2.9~3.4

Si

2.2~2.8

Mn

0.5~0.9

P

0.1~0.4

S

0.09

As

0.022

B

0.05~0.08

Cr

0.2~0.4