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Basic components of 2-s Engine

Basic components of 2-s Engines


2-stroke crosshead engine 

  • It is very important to know the basic components of our 2-s engine along with the position of each components. Here below is the diagram showing the various components and how they are assembled.
  •  Mainly 2-s Engine are of two types . a. Trunk type  b. crosshead type                                          
  • We are generally not using trunk type 2-s engine because crankcase contamination is very high , in order to lubricate liner using crankcase oil (splash lubrication) fouling of scavenging   space taken place which can more risk of scavenge fire , chances of hotspot in the crankcase is very high , wear of liner is more.                                                                                                        
  • Here in the diagram we can see clearly the combustion space is formed by liner , piston and cylinder head.
  •  Diaphragm plate separates crankcase and scavenging space while stuffing box is bolted on diaphragm plate  provides sealing in between these space and preventing carryover of  lube oil through piston rod from the crankcase  and scavenging air leaking to the crankcase.

  • The foot  of the piston rod is bolted to the crosshead pin .
  •   Top end of the connecting rod swings about the crosshead pin while the  bottom end turns the crankshaft as the gas expands in the combustion space.

  • To ensure that the crosshead reciprocates in alignment with the piston in the cylinder, guide shoes are attached either side of the crosshead pin. These shoes are lined with white metal , bearing metal and it is bolted to the engine frame .

  • Due to crosshead design stroke of the engine can be increased and more powerful engine can be designed. eg. bore dia = 1m , stroke length =2.5m 
                       

                                                                 

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