List 2 double-crank mechanisms that are used in industry. Justify why each mechanism belongs in the "double-crank" group. (Please provide picture of mechanism)
List 2 double-crank mechanisms that are used in industry. Justify why each
Double-crank mechanisms are used in a wide variety of industrial applications, including locomotives, steam engines, pumps, compressors, and presses.
The following are the two important mechanisms of double-crank mechanism.
Scotch Yoke Mechanism
The Scotch Yoke mechanism converts rotational motion into linear reciprocating motion. It consists of a slotted crosshead (yoke) that slides over a rotating disk with a pin inserted into the slot. As the disk rotates, the crosshead is guided in a linear back-and-forth motion.
This is considered a double-crank mechanism because it has two crank elements - the rotating disk acts as one crank, while the slot in the crosshead forms the second crank. The coupling between the cranks changes the motion.
Coupled wheels of a locomotive
The coupled wheels of a locomotive are a double-crank mechanism because they are connected by two cranks and a connecting rod. The cranks are attached to the axles of the locomotive, and the connecting rod is attached to the pistons. When the pistons move up and down, they cause the cranks to rotate.
The rotation of the cranks is then transmitted to the axles, which causes the wheels to turn.
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