Crankshaft
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| − | + | The crankshaft is that mechanical part in a reciprocating combustion engine able to perform a conversion between reciprocating motion and rotational motion. It translates the reciprocating motion of the pistons into rotational motion. In order to do the conversion between two motions, the crankshaft has "crank throws" or "crankpins" to which the rods are attached and whose axis is offset from that of the crank. | |
| + | One could consider the crankshaft as the backbone of the engine finally delivering the rotational output to drive a vehicle or shaft. | ||
| + | The crankshaft is a very old solution to the problem of motion translation from a linear to a rotational. It can be found in various forms from a simple old fashioned coffee mill with a hand crank, steam locomotives, in weaving machines, to modern engines. | ||
| − | + | === RECIPROCATING ENGINE CRANKSHAFT === | |
| + | Over time we are seeing today a crankshaft in our engines with a long history of technical development. Nearly all modern crankshafts in combustion engines use similar technologies. | ||
| + | General info and a bit of history | ||
| − | http://www. | + | == CONSTRUCTION == |
| + | Add the different construction and casting forging processes | ||
| + | |||
| + | Maybe the pressed together contraptions of some motorcyles | ||
| + | |||
| + | == BEARINGS == | ||
| + | The types used today | ||
| + | - shells | ||
| + | - where do the tangs go and why does it or does not matter | ||
| + | - Thin wall bearings | ||
| + | - Oval bearings and what the oil wedge does | ||
| + | - Theory of load bearing e.g. why a center groove is no good on narrow bearings | ||
| + | - Roller or other type of revolving bearings used (needle, roller, ball bearings) | ||
| + | |||
| + | == LUBRICATION AND LOAD BEARING == | ||
| + | - What it does and how it gets to the rod throws | ||
| + | - What the problems are on some cranks. e.g. half bearing shell channel oiling and such | ||
| + | - That the main bearing also supplies the rod bearings | ||
| + | - Oiling and heat removal | ||
| + | - Bearing clearance and oil heating vs. load bearing | ||
| + | |||
| + | |||
| + | [http://www.jensensenginetech.com/4-05_tech_tip.html Article on the crankshaft] | ||
| + | |||
| + | [[Category:Undeveloped articles]] | ||
| + | [[Category:Undeveloped Engine articles]] | ||
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