What are the different types of crankshafts used for?
The crankshaft converts reciprocative motion to rotational motion. It contains counter weights to smoothen the engine revolutions. There are two types of crankshaft, the monolithic type ( Fig. 8.1 ), used for multi-cylinder engines, and the assembled type ( Fig. 8.2) fabricated from separate elements, which is mainly used for motorcycles.
How does the piston work in a crankshaft?
Courtesy of Cooper Industries Energy Services Group. The connecting rod connects the crankshaft to the crosshead. The crosshead converts the rotating motion of the connecting rod to a linear, oscillating motion, while driving the piston rod. The piston rod drives the piston that compresses the gas in the cylinder.
What is the schematic diagram of a crankshaft?
Schematic diagram showing crankshaft, connecting rod, crosshead, and piston rod. The crankshaft rotates about the frame axis, driving the connecting rod, crosshead, piston rod, and piston. Crankshafts are one-piece forgings or castings, although provisions are usually made for removable counterweights.
Why are the journal Surfaces of crankshafts hardened?
The journal surfaces of crankshafts are usually induction hardened to resist scuffing wear on cold-start conditions when journal lubrication may be minimal. View chapter Purchase book Modal and vibration analysis of reciprocating compressor crankshaft system
The crankshaft converts reciprocative motion to rotational motion. It contains counter weights to smoothen the engine revolutions. There are two types of crankshaft, the monolithic type ( Fig. 8.1 ), used for multi-cylinder engines, and the assembled type ( Fig. 8.2) fabricated from separate elements, which is mainly used for motorcycles.
How does the front end of the crankshaft work?
This is basically the output of the engine – and power is taken to where it’s needed: propellers for boats and aircraft, induction coils for generators, and to the road wheels in a vehicle. The front end of the crankshaft, sometimes called the nose, is a shaft which extends beyond the crankcase.
Where does the oil come from for the crankshaft?
Supplying oil to the main journal bearing is easy: Oil galleries from the engine block lead to each crankshaft saddle, and a matching hole in the bearing shell allows this oil to reach the journal. The rod journal bearings require the same lubrication but they are rotating around the crankshaft at an offset.
Why do they put counterweights in the crankshaft?
Counterweights The crankshaft is subject to strong rotational forces, and the mass of the connecting rod and piston moving up and down exerts a significant force. Counterweights are cast as part of the crankshaft to balance out these forces. These counterweights allow for a smoother running engine and higher RPM.