The function of the connecting rod is to transmit the gas pressure and inertia force acting on the piston to the crankshaft, and connect the piston or crosshead with the crankshaft, and turn the reciprocating motion of the piston into the rotary motion of the crankshaft. The main requirements for the connecting rod are: the connecting rod should be resistant to fatigue and impact, and have sufficient strength and stiffness.
The connecting rod bolt is an important connecting bolt connecting the big end of the connecting rod to the bearing seat. If the connecting rod bolt breaks during operation, a major accident of machine damage will occur, so the installation must be performed strictly in accordance with the instructions. Such as the installation of the pre-tightening force, pre-tightening method, pre-tightening sequence, and even the inspection and replacement of connecting rod bolts must be carried out in strict accordance with regulations. Practice has proved that correct tightening and locking is an effective measure to avoid fracture accidents.