crankshaft

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Related to Crankshafts: Connecting rods

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 ?
The crankshaft material was made from ASTM A536 GR 80-55-06 casting and machined to final dimension.
The main task of ten cycloidal gear reducers research - identification of vibration sources and determined parameters in attempt to evaluate technical condition of each cycloidal drive, especially technical condition of crankshafts eccentric antifriction bearings.
Crankshaft systems of reciprocating compressors have an effective influence on compressor performance, being the main part responsible for vibration production [2].
Regular repairs of marine diesel engine crankshaft main and crankpin journals surfaces are therefore needed in order to perform partial or complete renovation of the worn crankshaft journals.
Mape, already a supplier to the Volvo Group, makes crankshafts, balance shafts and connecting rods for the automotive industry.
Key words: numerical modeling, marine internal-combustion engine, crankshaft, stresses
The Rail Accident Investigation Branch (RAIB) report revealed that at 57mph the 10 litre engine fell when its crankshaft broke.
The focus of ECG is on industrial crankshafts that weigh from 400 to 60,000 lb.
The contracts will be over a five to ten year period and delivered by Darcast Crankshafts at Smethwick which is the largest cast crankshaft manufacturer in the UK.
The method has been used in the automotive, truck, and offroad industries for many years, and has proven to be a reliable and cost-effective method to improve the fatigue strength of crankshafts.
5-meter crankshafts and acquires measuring points at one-tenth degree intervals.
Some 3774 owners of Lycoming O-360 and O-540 engines will have to replace crankshafts within 12 calendar years or when the case is opened at the next opportunity.