Exam Question

Crosshead Guides in Large Reciprocating Engines
(a) Function of Crosshead Guides and Need for Ahead/Astern Faces
Reason for Fitting Crosshead Guides
Crosshead guides are fitted to large, slow-speed reciprocating engines to absorb the side thrust created by the angular movement of the connecting rod during the power cycle. This side thrust, if left unmanaged, would force the piston hard against the cylinder liner , leading to excessive wear on both the piston and the liner. The guides ensure the piston rod maintains a perfectly vertical, linear path 📏.