What Is The Working Principle Of The Engine Crankshaft

Hello everyone, today I will answer the above questions for you. The working principle diagram of the engine crankshaft, and what the working principle of the engine crankshaft is, many people still do not know. Now let's take a look together!

The most important part of the engine. It bears the force transmitted from the connecting rod and converts it into torque, which is output by the crankshaft and drives other accessories on the engine to work. The crankshaft is subjected to the combined action of centrifugal force of rotating mass, periodically varying gas inertia force, and reciprocating inertia force, which causes the crankshaft to withstand bending and torsional loads. Therefore, the crankshaft is required to have sufficient strength and stiffness, and the surface of the journal should be wear-resistant, work evenly, and have good balance.

In order to reduce the mass of the crankshaft and the centrifugal force generated during movement, the crankshaft journal is usually made hollow. Each journal surface has an oil hole to introduce or export oil to lubricate the journal surface. In order to reduce stress concentration, the joints of the main journal, crank pin, and crank arm are connected by transition arcs.

The role of crankshaft counterweight (also known as counterweight) is to balance the rotational centrifugal force and its torque, and sometimes it can also balance the reciprocating inertial force and its torque. When these forces and moments balance themselves, the counterweight can also be used to reduce the load on the main bearing. The number, size, and position of balancing weights should be considered based on the number of cylinders, cylinder arrangement, and crankshaft shape of the engine. The balance weight is generally cast or forged together with the crankshaft. The balance weight of a high-power diesel engine is manufactured separately from the crankshaft and then fixed together with bolts.