UNIVERSITI TUNKU ABDUL RAHMAN
Faculty Course : : Engineering & Science Bachelor of Engineering (Hons) Mechanical Engineering Year 3/ Semester 1 Unit Code Unit Title : : UEME3133 Mechanics of Machines
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Experiment 1 : Epicyclic Gear Train
1. Objectives • • • • • • • To understand the working principle of epicyclic gear system. To calculate gear ratio of the epicyclic gear system. To determine the input power and output power of the epicyclic gear system. To determine the power loss of the epicyclic gear system. To measure the different stage epicyclic gear systems speed output. To measure the output torque generated by the epicyclic gear system. To calculate epicyclic gear system efficiency.
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The three basic components of the epicyclic gear are: • • • Sun - The central gear. Planet carrier - Holds one or more peripheral planet gears, same size, meshed with the sun gear. Annulus - An outer ring with inward-facing teeth that mesh with the planet gear or gears.
planet gear sun gear planet gear carrier Figure 2 Figure 2 shows the carrier is held stationary while the sun gear is used as input. The planet gears turn in a ratio determined by the number of teeth in each gear. Here, the ratio is -24/16, or -3/2; each planet gear turns at 3/2 the rate of the sun gear, in the opposite direction. In many epicyclic gearing systems, one of these three basic components is held stationary; one of the two remaining components is an input, providing power to the system, while the last component is an output, receiving power from the system. The ratio of input rotation to output rotation is dependent upon the number of teeth in each gear, and upon which component is held stationary. One situation is when the planetary carrier is held stationary, and the sun gear is used as input. In this case, the planetary gears simply rotate about their own axes at a rate determined by the number of teeth in each gear. If the sun gear has S teeth, and each planet gear has P teeth, then the ratio is equal to -S/P. For instance, if the sun gear has 24 teeth, and each planet has 16 teeth, then the ratio is -24/16, or -3/2; this means that one clockwise turn of the sun gear produces 1.5
The worm drive gearbox is comprised of a worm screw running off the input shaft and engaging the worm wheel perpendicularly1. Bonfiglioli states in their quality standards that they are committed to supplying effective products and go on to say they will never compromise on safety, compliance or quality2. As a business, it is in their best interests to do so as cost effectively as possible; keeping both these points in mind will help to analyse the various parts of the gearbox and assess possible materials used, as well as manufacturing processes performed.
As its main function is to reduce the friction, and providing bearing support, its conceivable failure is detected by testing during maintenance. the probability of failure is either wearing off the rolling element, or misalignment of bearing which is a result of failure of bearing spacer. The system effect due to this is difficulty in cornering the vehicle, harsh
The power system consists of a four-stroke engine, a carburettor to transform incoming fuel into steam, a obstruct to control the air-fuel ratio, transmission, and drum brakes. A cylindrical piston, made of aluminium alloy as most people
The exoplanet known as Kepler-453b is what is known as a circumbinary planet. A circumbinary planet is a planet that orbits two stars, and Kepler-453b is the tenth such planet discovered so far. It is a timely discovery not only because it was discovered at around the same time that news broke out of the world’s superpowers looking to make Star Wars a reality by waging war in space, but also because the real-life Tatooine was discovered by chance in a classic case of being in the right place at the right time.
THE F-TYPE HAS A LIGHTWEIGHT ALUMINUM BODY STRUCTURE WITH HIGH TORSIONAL UNBENDING NATURE, MAKING IT THE PERFECT STAGE FOR A GAMES AUTO. THIS SOLID, INFLEXIBLE STRUCTURE GIVES A NATURALLY STABLE STAGE TO EXACT, SPRY TAKING CARE OF, AND IS THE IDEAL SUPPLEMENT TO THE SUPERIOR MOTOR EXTENT. THE OUTCOME IS OUTSTANDING ENERGY TO-WEIGHT AND TORQUE-TO-WEIGHT PROPORTIONS –THIS PRESENT REALITY MEASURES OF GAMES AUTO
| Source:International Journal of Advanced Manufacturing Technology, May2010, Vol. 47 Issue 1-4, p381-393, 13p, 2 Diagrams, 10 Charts, 1 GraphChart; found on p384
c. The North and South celestial poles are related to the Earth’s axis of rotation by their intersection with the celestial sphere.
Identify and describe the components and structure of our Solar System. Include important facts and figures.
Exoplanets are interesting to us for a number of reasons. By locating and observing them, we are able to gather a variety of useful data that tells us details about the planet, and then compare and contrast them to other exoplanets, as well as our own planet Earth. These comparisons are our attempt at better understanding the formation history of rocky planets such as the one we live on today, and furthermore understand the future of rocky planets based on their internal composition and proximity to their host stars.
Luke’s planet could have orbited both stars if the planet was far enough when it started. Each star has its own gravity well and could potentially cause close enough planets to be pulled into either star. This could happen due to changes in the positions of th revolving strts. There is a chance though that the planet is far enough away so it can revolve around just one or both star depending on the gravity well.
Mr. Abou-Zeid has a Diploma in Mechanical Engineering with a specialization in Energy (Gas steam turbine engines and combustion engines) from University of Applied Sciences, Germany
This experiment taught us, how PASCO photogate device helped us to find the constant velocity, while a cart sliding on the flat surface forward and backward. Experiment 9, allowed us to learn how to M2 Cart (kg), M1 hanger (kg), and Angle (degrees) to find the missing value of the friction Theo, experiment average, normal, friction coefficient, a percentage error of coefficient, and the percentage error. It also helped us to find the constant velocity while a cart going up and rolling down on an angle ramp. Overall, this experiment increased out knowledge of how to use formulas and Newton’s law to get the results of the experiment and how to maintain the velocity of a cart in the same speed by weight of the
The radial velocity method was used to detect the first exoplanet, 51 Pegasi b (51 Peg b) around a main sequence star, 51 Pegasi (51 Peg). The radial velocity method uses the variations in velocity of a star due to the gravitational pull from an exoplanet (Lissauer 2002). Furthermore the velocity isn’t measured in terms of actual speed but in terms of light based on the Doppler effect. The Doppler effect occurs when a star moves. When it moves toward us, its wavelengths of light are shortened and when a star moves away from us, its wavelengths of light are lengthened. Through the continued observation of the Doppler effect on a stars spectrum of light, the velocity of a star is inferred. Any change in a stars velocity is caused by a sufficiently massive companion, an exoplanet (Lissaeur 2002).
Baxton Technology Company manufactures surface automotive hoists which are used by garages, service stations and other repair shops to lift cars for servicing. Because of its design, quality of workmanship, safety features, ease of installation and five-year warranty, Baxton Lifts achieved a reputation as the “Mercedes” of the hoist industry and is considered a leader in automotive lift safety in Canada and United States.
My primary research focuses on designing mechanical systems/components and investigating mechanical interactions between machine components. The treatments required a truly multidisciplinary research effort span the entire mechanical systems and solid mechanics spectrums of mechanical engineering. The research involved design, development, and experimental verifications of mechanical components and systems, and account for parameters that influence their interactions. My experience and knowledge has led me to expand my research to account for failure of machine components and systems with applications in automotive, aerospace, and oil and gas industries such as automotive brake systems and clutches, aircraft landing gears, and drilling downhole assembly.