MECHANICAL ENGINEERING PROJECT TOPICS & MATERIALS

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MECHANICAL ENGINEERING PROJECT TOPICS & MATERIALS ON DESIGN AND CONSTRUCTION OF MITCHELL TILTING PAD APPARATUS

CHAPTER ONE
INTRODUCTION
The Mitchell tilting pad apparatus is a hydrodynamic measuring instrument developed in the early 1880’s in the laboratory of Beauchamp Tower in England. Tower was employed to study the friction in railway journal bearings and come up with the best method of lubricating them. The Mitchell tilting pad apparatus is used broadly in two different experiments namely; MECHANICAL ENGINEERING PROJECT TOPICS & MATERIALS
1) Determination of the load carrying capacity of the slider bearing.
2) Confirming the theory of the hydrodynamic lubrication.
Tilting pad journal bearings are a source of both static support and dynamic stiffness and damping. Tilting pad journal bearings have a number of pads, typically four or five. Each pad in the bearing is free to rotate about a pivot and cannot support a moment. As a result, the destabilizing forces are greatly

reduced or eliminated, and the bearings are no longer a potential source of rotordynamic instability. This feature has made tilting pad journal bearings the standard fluid-film bearing for most high-speed applications. High-speed rotordynamic applications often have rotors that pass through one or two bending critical speeds as the machines are accelerated to the operating speed. The damping from the fluid film bearings is required to safely pass through these bending critical speeds as the rotating element is accelerated. The damping also helps suppress potentially destabilizing forces from sources such as radial seals, balance pistons, impeller eye seals, internal friction fits, and unbalanced electromagnetic forces. MECHANICAL ENGINEERING PROJECT TOPICS & MATERIALS

1.1 AIMS AND OBJECTIVES OF THE PROJECT
The project designing, constructing and testing on the Mitchell tilting pad apparatus is aimed at achieving the following objectives:
1) To verify the hydrodynamic theory of lubrication as it was propounded by Beauchamp Tower in 1880 AD. MECHANICAL ENGINEERING PROJECT TOPICS & MATERIALS
2) To determine the load carrying capacity of the tilting pad slider bearing
3) To provide the fluid mechanics laboratory of the Mechanical Engineering Department with a hydrodynamic fluid analyzing apparatus.
4) To activate and motivate the students potentials into practically solving problems facing mankind.
5) To run tests with the apparatus and compare the results obtained with the established or ideal standards.
1.2 PROJECT JUSTIFICATION MECHANICAL ENGINEERING PROJECT TOPICS & MATERIALS
Engineering is known to be to be practice-oriented discipline. Inotherwords, no useful Engineering endeavor can exist in theory only, it must be applied to touch and transform life through meaningful practice. Therefore, this project task given to us is to ensure the knowledge we students gained throughout our five year degree programme and channeled towards the construction of Mechanical Engineering equipments.
1.3 APPLICATIONS AND USES
The Mitchell tilting pad apparatus is applicable in experiments which does not require;

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