Maritime Discussion: generators
  Active Topics  Memberlist  Calendar  Search  Register  Login  
Engineering
 Maritime Discussion :Maritime Knowledgebase :Engineering
Topic: generators Post Reply Post New Topic
Author Message
somraj roychoudhury
Jobships Member
Jobships Member

Location: west bengal
Posts: 2
Quote somraj roychoudhury Replybullet Topic: generators
    Posted: 24 Jul 2007 at 10:04pm
In my last ship my generator was dihatsu.
In the piston it was seen that there were two scraper rings,one below the gudgeon pin and the other just above the gudgeon pin,if this was so,then how was the compression rings above the scraper rings were getting lubricated?
IP IP Logged
PERI AVADHANI
Jobships Member
Jobships Member

Location: Andhra Pradesh
Posts: 4
Quote PERI AVADHANI Replybullet Posted: 19 Oct 2007 at 7:05am
Hi,
   The cylinder lubrication is carried out in this particular engine is by applying oil on the cylinder surface between the scrapper rings. By doing so using the small pores in the cast Iron liner holds the lub oil to lubricate the rubbing surface between the rings and the liner surface to reduce the friction. ( in the case of the Crome plated liner the honed surface does this work- and this is the function of the honning we do on the generators.)
 
Cylinder lubrication is not effective when the cylinder pressure is high or the combustion is being carried out.
 
Best Regards,
IP IP Logged
ved prakash
Jobships Member
Jobships Member

Location: uttar pradesh
Posts: 2
Quote ved prakash Replybullet Posted: 29 Jul 2010 at 6:13am
the upper scraper ring serves the purpose of spreading lube on the liner surface
and scraping the oil also.
 
this lubrication is valid for all loads and combustion conditions
as long as lube oil pressure is more than 3.5 kg
IP IP Logged
Post Reply Post New Topic
Printable version Printable version

Forum Jump
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot delete your posts in this forum
You cannot edit your posts in this forum
You cannot create polls in this forum
You cannot vote in polls in this forum



This page was generated in 0.063 seconds.
About Us Advertise Site Map FAQs Feedback Contact Us Refer a Friend