The crankshaft is a component in engines that converts the linear motion of the pistons into rotational motion
The crankshaft is usually mounted on the cylinder block by the bearing and adjusts the release or longitudinal looseness of the crankshaft by a piece called the “bearing arm”. Crankshaft clearance in bearings is less than one tenth of a millimeter. The crankshaft has fixed and movable hinges or connection points, fixed hinges are closed by fixed bearings on the cylinder block and have only rotational motion and therefore are called by this name. The movable hinges, which in addition to rotational motion also have a rotational motion, are connected to the connecting rod by a movable bearing. The connecting rod is also connected to the piston via a pin pin, which converts the reciprocating motion of the piston, called the piston stroke, into a rotational motion.
There are holes on the fixed crankshafts that lead to the moving cranks, through which the engine oil lubricates the movable bearings. There is usually a gear on the front of the crankshaft that rotates the camshaft or valve stem by means of a chain, belt or gear. Alternator alternator, steering hydraulic pump, air conditioner compressor and water pump are also supplied by crankshaft rotation by belts and pulleys. The anchor wheel or flywheel is closed at the end of the crankshaft, on which the disc and clutch cover are closed and the force is transmitted to the gearbox and then to the wheels. To better understand the mechanism of operation of the crankshaft, it can be compared to bicycle pedals
The crankshaft system was first invented by the Iranian inventor Badi al-Zaman Hazri (1136-1206) in 1200 AD. He used a crankshanft in two types of water lifting devices
Crankshaft application
The crankshaft is one of the parts of the internal combustion engine that is subjected to alternating bending and torsional loads during its working life. Failure of the crankshaft can cause serious damage to the engine, so it is important to check the fatigue strength during design. Crankshaft design has many challenges, including payload, optimum weight, greater efficiency and longer life
It is the axial crankshaft that converts the reciprocating motion of the pistons into rotational motion. This reaction unit converts all engine pistons into a single rotational force that causes the vehicle to move. The capability and life of the internal combustion engine is highly dependent on the strength of the crankshaft. Due to the fact that the load on the crankshaft is intermittent, it is necessary to consider the fatigue analysis and durability of the part during its working life in the design process. The production of expensive parts such as crankshafts with the least possible weight and good fatigue strength is always an important issue in the industry. This is important in lighter and smaller engines with better fuel efficiency and higher power output. One of the most common types of crankshaft failure is fatigue due to the flexural load due to combustion at cross-sectional surfaces or the same 5 step areas. Changes in the geometry of the crankshaft cause stress to be concentrated at stepped points, the points where the bearings are connected to the crankshaft. In addition, the piece is subjected to both torsional and bending loads during its lifetime; Therefore, stepped areas are the points that withstand the most critical stress during the life of the crankshaft, and as a result, are vulnerable areas and failure due to fatigue in the part
Product customers:
The following factories and companies are the customers of this product:
- Iran Khodro
- Saipa
- Bahman khodro
- Bahman khodro
- Pars khodro
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