crankshaft


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Related to crankshaft: flywheel

crankshaft

a shaft having one or more cranks, esp the main shaft of an internal-combustion engine to which the connecting rods are attached

Crankshaft

 

a shaft consisting of one or more cranks and several coaxial crank journals resting on bearings.

Each crank of the crankshaft has two flanges and a journal for attaching a connecting rod. The axes of a crankpin are displaced relative to the axis of rotation of the crankshaft. In order to balance the crankshaft in operation, the flanges often have counterweights. The crankshaft is the rotating unit of a crank gear; it is used in piston engines, pumps, compressors, and forging and pressing machinery. In piston engines, the number of cranks on the crankshaft is usually equal to the number of cylinders, the arrangement of the cranks depends on the operating cycle and the conditions for counterbalancing the engine and arranging the cylinders.

Crankshafts are made whole, cast, or forged of carbon steel and alloy steel or high-strength cast iron. However, since antifriction bearings cannot be used with whole crankshafts, built-up crankshafts are sometimes made. Depending on production conditions, large crankshafts (journal diameter, to 1 m) can also be of built-up design. The simplest crankshafts to produce are those in which the axes of all of the crankpins are located in a single plane. The simplest crankshaft is the crank.

crankshaft

[′kraŋk‚shaft]
(mechanical engineering)
The shaft about which a crank rotates.

crankshaft

crankshaft
The central component of a reciprocating engine, a high-strength, alloy steel shaft with a hardened and polished bearing surface that rides the bearing in the crankcase. The propeller of an aircraft and the rotor transmission system of a helicopter is driven by the crankshaft.
References in periodicals archive ?
As for supporting owners on the second recall, Walsh told us Lycoming is now in a better position to provide crankshafts and engines on a quick turnaround basis, so it feels the cradle-to-grave treatment the 2002 owners got is no longer warranted.
In many cases, grinding diesel crankshafts with a conventional aluminum oxide abrasive wheel requires dressing once or twice per pin, which means that the grind cycle is held up waiting for the dress to be completed.
Internet also has found advantages with its crankshafts, as the firm can cast them via its green sand molding process, have the castings heat treated and then machined on a production line with no changes in tooling, speeds or feeds.
The chemical composition measured from failed section of crankshaft shown in table1.
In this work we put attention of fault diagnostics of vertical rotating system simultaneously running with ten cycloidal gear drives with doubled crankshafts and antifriction bearings.
Whereas in crank engines the piston's stroke is defined by the crankshaft, in a free piston engine the piston motion can be considerably extended, allowing over-expansion of burned gases to extract the maximum possible work before these are released.
But if you still want to pursue this idea, I guess you could employ some sort of separate electric motor to help you turn the crankshaft.
Subsequently the crankshaft journal is machined to the required dimensions, as per the manufacturer's specifications.
Part of its capacity, used to make crankshafts for Volvo Groupa[euro](tm)s automotive medium-duty engines, will be relocated as the group will switch to a new generation of engines next year, it said.
The letter of intent contains conditions regulating the sale of the plant, leasing of the building and the continued supply of crankshafts to the Volvo Group.
Key words: numerical modeling, marine internal-combustion engine, crankshaft, stresses