Skip to main content

Causes and signs of liner crack

Sign of liner crack
  • Fluctuation of pressure and temperature of jacket C.W system  
  • F.W coming out from the scavenge drains  
  • Overload at that particular unit (high in exht: temp: and Jacket temp)  
  • Expansion tank foaming
 
CAUSES
  • Due to rapid contraction of metal  
  • High difference in Jacket water (working) temperature  
  • Insufficient cooling  
  • Over tightening of cylinder head bolts 
  • Design failure 
  • After effect of immense Scavenge fire  
  • Due to loosened out foundation chocks resulting tie bolt slackening and Hoop Stresses on Cylinder liner increases  
  • Due to very high injection viscosity
Labels:

Comments

  1. Visual WorksDecember 1, 2021 at 4:30 AM

    It is truly a practical blog to discover some various resource to include my knowledge. New York Signage

    ReplyDelete
  2. Robert stevesonDecember 24, 2021 at 7:27 AM

    You are providing good knowledge. It is really helpful and factual information for us and everyone to increase knowledge.about outdoor metal signs. Continue sharing your data. Thank you.

    ReplyDelete
  3. riverdalesheepskinDecember 29, 2021 at 1:03 PM

    I admire this article for the well-researched content and excellent wording. I got so involved in this material that I couldn’t stop reading. I am impressed with your work and skill. Thank you so much.vintage flying jacket

    ReplyDelete

Post a Comment

If you have any doubts.Please let me know

Popular posts from this blog

Differences between MC/MC-C and ME/ME-C engines

The electrohydraulic control mechanisms of the ME engine replace the following components of the conventional MC engine: Chain drive for camshaft Camshaft with fuel cams, exhaust cams and indicator cams Fuel pump actuating gear, including roller guides and reversing mechanism Conventional fuel pressure booster and VIT system Exhaust valve actuating gear and roller guides Engine driven starting air distributor Electronic governor with actuator Regulating shaft Engine side control console Mechanical cylinder lubricators. The Engine Control System of the ME engine comprises: Control units Hydraulic power supply unit Hydraulic cylinder units, including: Electronically controlled fuel injection, and Electronically controlled exhaust valve activation Electronically controlled starting air valves Electronically controlled auxiliary blowers Integrated electronic governor functions Tacho system Electronically controlled Alpha lubricators
1 comment
Read more

Shell Expansion Plan

It is a two dimensional drawing of a three dimensional surface of the ship’s hull form. This plan is very useful for the following information:It is used for marking the location of a hull Damage on this plan by identifying the strake number , letter and frame number so that the exact location of the damage and also suggested repairs are marked in a localised copy. The shell expansion can be used for finding areas of painting surfaces such as topside, boot topping and bottom areas by applying Simpsons rules directly.  In the shell expansion the vertical scale used is different from the horizontal scale and a suitable adjustment has to be made when calculating areas. This becomes useful in solving disputes concerning areas of preparation and painting. It gives information on the thickness of the original strake which is indicated by the number in the circle shown in the strake.  The quality of steel used is also shown by letters A,B,D E and AH, BH,DH, EH.
8 comments
Read more

Why is a man hole door elliptical in shape?

Any opening in a pressure vessel is kept to a minimum and for a man entry an elliptical hole  is lesser in size than the corresponding circular hole. More over it is prime concern to have a  smoothed generous radius at the corners to eliminate stress concentration. Hence other  geometrical shapes like rectangle and square are ruled out.  To compensate for the loss of material in the shell due to opening, a doubler ring has to be  provided around the opening. The thickness of the ring depends on the axis length along the  dirrection in which the stresses are maximum and the thickness of the shell. It is important to  align the minor axis along the length of the vessel, as the stress in this direction is  maximum. Longitudinal stress: Pd/2t where P= pressure inside the vessel, d= diameter of the arc, t=  thickness of the shell plating  Circumferential stress: Pd/4t  More over a considerable material and weight saving is achieved as minor is along the  direction of maximum stress.
2 comments
Read more