PURPOSE: A top bracing of a ship main engine is provided to reduce the vibration of a ship main engine, the vibration of an accommodation space, and the weight due to a ship main engine through increasing damping and oil viscosity by maximizing the oil friction area by using a pipe body for damping and increasing oil viscosity.;CONSTITUTION: A top bracing(100) of a ship main engine comprises a piston(110), a piston rod(120), a cylinder(130), an oil flow pipe(140), an accumulator(150), a pipe body for damping and increasing oil viscosity(400). One end of the piston rod is coupled with the piston and the other end is coupled with the connection part of a ship engine. A determined part of the cylinder is coupled with a ship structure and includes a piston in the inner space. The cylinder comprises pressure control holes(136) in the upper both sides. The oil flow pipe comprises a variable orifice(142) and controls the inner pressure of a first chamber(132) and a second chamber(134) through being coupled with the pressure control holes. The accumulator controls the inner pressure of the cylinder. The pipe body for damping and increasing oil viscosity is formed into zigzag shape and installed between the oil flow pipe and the accumulator.;COPYRIGHT KIPO 2012
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