Discover The Top Strategies From The Worlds Best Internet Marketing Experts and SeminarsFull description
this report was prepared after visiting the Fonterra milk processing factory at Biyagama, Sri Lanka.
copyright reserved
Full description
enjoy!!!!!!
enjoy!!!!!!
Procurement CommitteeFull description
Efficiency of the centrifugal pump
Into the Web of Profit_Bromium_Final Report
A brief abstract report on how the OLA cabs managed to be the leading business model in Radio Taxi industry in India.
Children of The City., i passed this and got a perfect score., xD
Biologi
Internship Report
Efficiency of the centrifugal pumpFull description
About the literary club activities
Full description
Descrição: Discover The Top Strategies From The Worlds Best Internet Marketing Experts and Seminars
Description : its a project report submitted by us
detail in solar carFull description
Report of the Seminar On
“STUDY
OF
AIR BEARING”
By BALLAL MAHENDRA GULAB
Under Guidance of Prof. J. K. BHOR
Submitted in partial fulfillment of the requirements for the degree of BACHELOR OF MECHANICAL ENGINEERING YEAR 2016-2017
Department of Mechanical Engineering SHREEYASH COLLEGE OF ENGINEERING AND TECHNOLOGY AURANGABAD
CERTIFICATE
This is to certify that the seminar entitled “STUDY
OF
AIR BEARING”
Submitted by BALLAL MAHENDRA GULAB Is completed as per the requirements of the Dr. Babasaheb Ambedkar Marathwada University in partial fulfillment of degree of B.E. (Mechanical) For the academic year 2016-2017.
Prof. J.K.BHOR Guide
Prof. V.W. PATIL
Dr. R.S. PAWAR
HMED
Principal
Department of Mechanical Engineering SHREEYASH COLLEGE OF ENGINEERING AND TECHNOLOGY AURANGABAD YEAR 2016-2017
ACKNOWLEDGMENT Every orientation work has imprint of many people and this work is no different. This work gives us opportunity to express deep gratitude for the same. While preparing seminar report, we received endless help from number of people. This report would be incomplete if we don’t convey our sincere thanks to all those who involved. First and for most We thanks Prof. V.W.PATIL Head of Mechanical Department and our Seminar Guide Prof. J.K. BHOR for giving us opportunity to present this project and his indispensable support, priceless suggestion and valuable time we also thank all other staff members for advice and co-operation. Finally we wish to thanks our parents and friends for being supportive to us, without whom this project would not have seen the light of day. Every work is an outcome of foolproof planning, continuous hard work and organize effort.
Date:Place: - Aurangabad
BALLAL MAHENDRA GULAB [A-41185]
ABSTRACT Determination of the static characteristics of air bearings constitutes the necessary first phase in a design problem, which determines general feasibility. In order to realize a successful application, a good knowledge and assessment of the dynamic behaviour is needed to complement the previous step. In a conventional, passive bearing application, dynamically stable behaviour should be ensured by overcoming the occurrence of self-excited vibrations; the so-called “pneumatic hammering”. In active bearing applications, on the other hand, the dynamic bearing force, induced by actuation of the gap geometry or supply pressure, provides for a means of enhancing bearing static and dynamic performance, when integrated in a mechatronics system context. This paper presents on the one hand an overview of the methods used to model the dynamic characteristics of aerostatic films, deducing that the method of harmonic perturbation is often sufficient in providing a good estimate of the dynamic stiffness. This is confirmed by comparing theoretical results with dynamic response experiments. On the other hand, the general problem of active dynamic compensation is outlined and an application example is provided to show the high levels of performance achievable by employing this method.
Keywords: — Air bearing, friction, load capacity, stiffness, wear.
INDEX SR.NO.
CHAPTER NAME
PAGE NO.
List of Figure
i
List of Graph
i
List of table
i
ABSTRACT 1
INTRODUCTION
1
2
LITERATURE REVIEW
3
3
AIR BEARING
4
3.1 Types Of Air Bearing
4
3.2 Use Of Air Bearings In Ultra-Precision Spindle
6
3.3 The Basic Principle
7
3.4. Classification Of Aerostatic Bearing
8
3.5. Material Selection
8
3.6. Materials Of The Air Bearing Spindle
9
3.7. Load Capacity
9
3.8. Stiffness
9
3.9. Effect Of Orifice Diameter
9
3.10. Effect Of Supply Pressure
11
3.11. Effect Of Bearing Diameter
12
3.12. Design Methodology
14
AIR BEARINGS BASED ON CERAMIC COMPOSITES
16
4.1. Pressure Profile In Bearing Gap
18
4.2. Load Capacity Of Planar Bearing
19
5
ADVANTAGES
22
6
DISADVANTAGES
25
7
APPLICATION
26
8
FUTURE SCOPE
27
9
CONCLUCION
28
4
REFERENCE
FIGURE INDEX SR.NO.
NAME OF FIGURE
PAGE NO.
1
Cross-Section Through Bearing, Fitted With Orifice
1
2
Section Through Orifice Line
2
3
Air Supply
5
4
Air Bearing Spindle
6
5
Strategy For Air Bearing Design
15
6
Pressure Distribution On The Bearing Surface For Orifices And Porous
17
Bearings 7
Fibre Structure Of Porous Composite Sic/Sic
18
8
Pressure Profile In Gap Of A Planar Thrust Bearing
19
9
High Speed Application Advantage
23
GRAPH INDEX SR.NO.
NAME OF GRAPH
PAGE NO.
1
Plot Of Load Capacity With Air Gap
10
2
Plot Of Stiffness With Air Gap
10
3
Load Versus Air Gap Plot For Different Point
11
4
Stiffness Versus Air Gap Plot For Different Point
12
5
Load Plot For Different Bearing Diameter
13
6
Stiffness Plot For Different Bearing Diameter
13
7
Measured Load Capacity For Several Air Gaps
20
8
Stiffness In Relation Of Bearing Gap And Several Supply Pressures
