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Komatsu 6D170 Crankshaft

2024-06-13


Part Number:
6162-33-1402,6162331402

Applications:
Komatsu Engine:6D170


The most important component of an engine. It takes the force from the connecting rod and converts it into torque output through the crankshaft and drives the other accessories on the engine to work. The crankshaft is affected by centrifugal force of rotating mass, periodic gas inertia force and reciprocating inertia force, which makes the crankshaft bear the action of bending and torsional load. Therefore, the crankshaft is required to have sufficient strength and stiffness, and the journal surface should be wear-resistant, uniform and balanced.
In order to reduce the mass of the crankshaft and the centrifugal force generated during movement, the crankshaft journal is often hollow. Each journal surface is provided with an oil hole for oil introduction or extraction to lubricate the journal surface. In order to reduce stress concentration, the connection of the spindle neck, the crank pin and the crank arm are connected by a transitional arc.
The role of the crankshaft counterweight (also known as counterweight) is to balance the rotating centrifugal force and its moment, and sometimes the reciprocating inertial force and its moment. When these forces and moments themselves are balanced, the balance weight can also be used to reduce the load on the main bearing. The number, size and placement of the balance weight should be considered according to the number of cylinders of the engine, the arrangement of cylinders and the shape of the crankshaft. The balance weight is generally cast or forged into one with the crankshaft, and the high-power diesel engine balance weight is manufactured separately from the crankshaft and then bolted together.