Skip to main content

Piston ring defects

1.incorrectly fitted rings- (Axial clearance)If they are too tightly fitted- rings could seize causing overheating, excessive wear and excessive blowpast. If too slack-  angular movement in the groove causes causing ring breakage and piston groove damage. butt clearance too high- excessive blow past.
2. Fouling due to deposits- rings sticking,breakage, increased blow past and scuffing.
3.corrosion- from ash deposits.
4. ring bearing surface in bad condition- increased liner wear and scoring.
Labels:

Comments

Post a Comment

Popular posts from this blog

Why atomisation test should not be done in slide type fuel valves

Since very small needle lift is obtained in the test equipment result in an unequal pressure distribution in the cut off shaft resulting in a hard contact in a small area along with high frequency oscillations, low lubricity of test oil will increase the chance of seizure. Full lift and high lubricity of heavy oil eliminates this risk  of seizure during normal operation.( Always open and clean slide type valves before testing as cold sticky heavy oil along with small clearances can cause restriction in the movement of the spindle).
Post a Comment
Read more