Introduction to Crankshaft topic:
Crank shaft mechanical seminar topic explains about a combustion engine the motion of a piston is reciprocating linear. To convert this reciprocating linear motion of piston to rotation the crank shaft is used. The crankshaft is generally abbreviated as crank. The crankshaft has crank throws and crank pins to convert the linear motion into rotation.
For good results and low costs the crank shaft production uses induction hardened bearing surfaces. It also allows the crankshaft to be reground without having to redo the hardening. But high performance crank shafts use nitrification process. This process is slower and costlier than the induction hardening bearing surface. With crankshafts that operate on roller bearings, the use of cauterization tends to be favored due to the high Hertz an contact stresses.
Most working and highly stressed part in any kind of engine is crank shaft. Therefore every precaution should be taken while making crank shaft. The majority of liberty crankshafts are made by using nickel – chromium steel. minimum physical properties: Elastic limit, 116,000 lb. per square inch; elongation in 2 in., 16 per cent, reduction of area, 50 per centralized impact, 34 ft.-lb.; Brunel hardness, 266 to 321. All crank shafts undergo heat treatment to check its capacity of withstand for high temperatures
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Introduction to Continuously variable transmission (CVT):
In continuously variable transmission (CVT) infinite number of effective gear ratios changes from maximum to minimum values. The difference between other mechanical transmissions and continuously variable transmission (CVT) is few different distinct gear ratios to be selected. Better fuel economy can be achieved by enabling the engine to run at most effective revolutions per minute in continuously variable transmission (CVT) than other mechanical transmission systems.
Continuously variable transmission has been in use from so many years. In this system to transfer power from power source to load friction play major role in power loss .To overcome the limitations inherent in the current CVT embodiments employing friction, a conceptual, continuously variable, positive engagement embodiment has been proposed for investigation at Brigham Young University.
There is different type of continuously variable transmission (CVT) system in different automobiles. Two V-belt pulleys that are split perpendicular to their axes of rotation, with a V-belt running between them are used in most common CVT’s. The main components used in continuously variable transmission (CVT) are 1. A high-power metal or rubber belt, 2 . A variable-input “driving” pulley, 3. An output “driven” pulley
Main advantage of using CVTs is it can be easily used as ideal transmission for different mechanical devices other than vehicles. power tools and drill presses are few areas where CVTs usage plays important role. Applications of CVTs are also mainly seen in two wheeler and four wheeler like tractors, scooters and snow mobiles. In all these applications rubber belts of high density are used which is not efficient because they may stretch and slip.
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Introduction to Autonomous Parallel Parking RC Car:
Increasing of automobiles in cities created difficulties for drivers to park their cars. To overcome this problem Autonomous Parallel Parking RC Car is created. The RC car identifies the parking space and parallel park by itself. The RC car is fixed with distance sensors. by using this distance sensors the car search for the parking space and when the car identified a space it checks whether the space is enough for parking. When it determines the space is enough for parallel parking it starts parking in that space. It uses the information from the sensor fixed at right and front sides of the car
There are very less tools available for parallel parking. Tools developed by car manufacturers are very expensive. So by using RC car as a proxy for real car we can overcome these problems. This project is divided into two parts. One is control system and the other is move car algorithm. The control system implements the directions given by move car algorithm.
In Autonomous Parallel Parking RC Car the control system contains all the hardware to interface with the move car algorithm and to drive the car for parking. The parking space detection and parking algorithms use information from the distance sensors.
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List of Hydraulic lift system for four wheeler:
Hydraulic lift system for four wheeler seminar topic is a mechanical engineering seminar idea which explains about functionality and usage of hydraulic lift systems in lifting vehicles when there is any problem to vehicles. Students can download seminar abstract which consists of detailed explanation about the topic.
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Introduction to Helicopter vibration reduction techniques:
Helicopter vibration reduction techniques mechanical seminar topic idea explains about different procedures need to implement to solve vibration problem in helicopters. This topic will cover details about advantages of helicopter and issues that reduces its performance.
Final year b.tech,m.tech and diploma mechanical engineering students can download helicopter vibration reduction techniques readymade paper presentation for free of cost. Detailed explanation about this topic is given in ppt.
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