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Tài liệu Bearing Design in Machinery P2 pptx
... explanation of the geometry of gears is included in many machine design textbooks, such as Machine Design, by Deutschman et al. (1975), or Machine Design, by Norton (1996). a. Find the reaction force ... ¼ 30 , and the pressure angle (PA) is f ¼ 20 . The shaft speed is 3600 RPM. The gearbox is designed to transmit maximum power of 20 kW. The diameter of the pitch circle of the gear is equal ... ¼ 30 , and the pressure angle (PA) is f ¼ 20 . The shaft speed is 1800 RPM. The gearbox is designed to transmit a maximum power of 12 kW. The diameter of the pitch circle of the gear is 5...
Ngày tải lên: 19/01/2014, 23:20
Tài liệu Bearing Design in Machinery P1 doc
... funda- mental aspects of bearing selection, design, and tribology. Design engineers require much more knowledge for bearing design than is usually taught in machine design courses. This book was developed ... senior courses in bearing design in machinery. These courses are offered under various titles, such as Tribology, Bearings and Bearing Lubrication, and Advanced Machine Design. This book is intended ... by engineers. In addition, students will find this book useful as a reference for design projects and machine design courses. Engineers have already realized that there is a need for a basic course...
Ngày tải lên: 19/01/2014, 23:20
Design of machinery mechanisms and machines 2nd ed
... engineering) Includes bibliographical references and index. ISBN 0-07-048395-7 1. Machinery -Design. 2. Machinery, Kinematics. 3. Machinery, Dynamics of. I. Title. II. Series. TJ230.N63 1999 91-7510 621.8'15-dc20 http://www.mhhe.com
Ngày tải lên: 08/04/2014, 11:35
Design of Machinery pdf
... allows the typing of a starting design number for the first design. This design number defaults to I and is automatically incremented each time you change the basic design during this program session. ... more he can see real machines doing real work, the more creative he can be as a designer. The engineering student should be required to run tools, make products, ad- just machinery and visit factories. ... is a linkage design and analysis program intended for use by stu- dents, engineers and other professionals who are knowledgeable in or are learning the art and science of linkage design. It is...
Ngày tải lên: 27/06/2014, 14:20
Bearing Design in Machinery P1 potx
... longer life of machinery. The selection of a proper bearing type for each application is essential to the reliable operation of machinery, and it is an important component of machine design. Most ... of machinery. The most important objectives of bearing design are to extend bearing life in machines, reduce friction energy losses and wear, and minimize maintenance expenses and downtime of machinery ... bearing design is the selection of the bearing type for each application. In most industries there is a tradition concerning the type of bearings applied in each machine. However, a designer should...
Ngày tải lên: 03/07/2014, 12:20
Bearing Design in Machinery P2 ppt
... explanation of the geometry of gears is included in many machine design textbooks, such as Machine Design, by Deutschman et al. (1975), or Machine Design, by Norton (1996). a. Find the reaction force ... selection and design are essential. 1.8 BEARINGS FOR PRECISION APPLICATIONS High-precision bearings are required for precision applications, mostly in machine tools and measuring machines, where ... temperature of the shaft much more than that of the housing of the machine. It is important to design the mounting of the bearings with a free fit in the housing on one side of the shaft. This bearing...
Ngày tải lên: 03/07/2014, 12:20
Bearing Design in Machinery Episode 3 Part 12 doc
... O. and Shapiro, W. (1968): ‘‘Computer-Aided Design of Hydrostatic Bearings for Machine Tool Applications’’, Proc. of 9th Int. Con. on Machine Tool Design and Research, University of Birmingham, ... (1975): Machine Design Theory and Practice, Macmillan Publishing Co. NY. Donaldson, R. R. and Patterson, S. R. (1983): ‘ Design and Construction of a Large Vertical Axis Diamond Turning Machine, ’’ ... 225–241. Rowe, W. B. (1967): ‘‘Experience with Four Types of Grinding Machine Spindle,’’ Proc. 8th Int. Conf. on Machine Tool Design and Research, Manchester University, pp. 453–476. Savage, M....
Ngày tải lên: 21/07/2014, 17:20
Bearing Design in Machinery Episode 3 Part 11 docx
... significant improvement in bearings in machinery, but the design of the hip replacement joint remains basically the same. This is an example where engineering design and the science of tribology ... early designs used metal-on-metal joints in which both the femoral head and socket were made of stainless steel. In 1961, Dr. Sir John Charnley in England introduced the UHMWPE socket design. ... interest in metal-on-metal articulating designs (Nolan and Phillips, 1996). Wear is still a major problem limiting the life of joint implants. With the current design and materials, young recipients...
Ngày tải lên: 21/07/2014, 17:20
Bearing Design in Machinery Episode 3 Part 10 ppt
... deteriorate. In order to benefit from the advantages of a composite bearing, in view of the many design parameters, the designer must in each case conduct a similar computer simulation to determine the dynamic ... metal lining. Therefore, in these cases, it is necessary to limit T max during the design stage. With a properly designed composite bearing, a much more uniform temperature distribution is expected; ... conduction at the contact between the rolling elements and races, the design of the bearing housing, and its connection to the body of the machine. In order to elucidate the effect of the rotation of...
Ngày tải lên: 21/07/2014, 17:20
Bearing Design in Machinery Episode 3 Part 9 potx
... a continuous trend to increase the speed of machines. Manufacturers continually attempt to increase machinery speed in order to reduce the size of machines without reducing power. It was shown ... bearing by using a composite bearing, which is a unique design of hydrodynamic and rolling bearings in series. In previous publications, this design was also referred to as the series hybrid bearing, ... hydrodynamic load capacity. The theory is for a short journal bearing, because it is widely used in machinery, and because the steady performance of a short bearing in the full hydrodynamic region...
Ngày tải lên: 21/07/2014, 17:20
Bearing Design in Machinery Episode 3 Part 8 pot
... applied successfully in actual machines. For example, Tafazoli (1995) describes a simple friction compensation method that improves the precision of motion in an industrial machine. Another application ... simulation is required for design purposes to prevent these vibrations. Stick-slip friction is considered a major limitation for high-precision manufacturing. In addition to machine tools, stick-slip ... problem in measurement devices and other precision machines. A lot of research has been done to eliminate the stick-slip friction, particularly in machine tools. Some solutions involve hardware modifications...
Ngày tải lên: 21/07/2014, 17:20
Bearing Design in Machinery Episode 3 Part 7 docx
... available friction-testing machines have been designed for measurements under steady conditions. For the measurement of dynamic friction, under time-variable conditions, a unique design of the testing ... several universal testing machines for measuring rolling-element bearing friction or journal bearing friction under dynamic conditions. Although other designs of friction-testing machines are often ... friction- testing machines can be applied for a journal bearing or a rolling-element bearing; the third machine is for friction in linear sliding motion. 14.6 FRICTION-TESTING MACHINE WITH A HYDROSTATIC...
Ngày tải lên: 21/07/2014, 17:20
Bearing Design in Machinery Episode 3 Part 6 docx
... Most commercial testing machines operate under steady conditions of sliding speed and load. 14.2 TESTING MACHINES FOR DRY AND BOUNDARY LUBRICATION Most commercial testing machines are for measuring ... friction-energy loss is only a portion of the total energy consumption of the machine. For all these reasons, various testing machines with accelerated tests have been developed and are used in laboratory ... However, in practice most machines are subjected to variable conditions, vibrations and disturbances and occasional oil starvation. For these reasons, even bearings designed to operate with a...
Ngày tải lên: 21/07/2014, 17:20
Bearing Design in Machinery Episode 3 Part 5 docx
... lubrication is used for machine tool spindles. Several examples of the various methods of oil lubrications follow. 13.16.1 Bearing Housing with Oil Sump Oil lubrication requires a special design of the ... referred to as a pillow block. Various standard designs of pillow blocks are available from bearing manufacturers. It is possible to select a design based on the optimal oil level and rate of ... a circulating system simplifies maintenance, particularly for large industrial machines with many bearings. For oil circulation, a special design of the housing is used for controlling the oil level. An example...
Ngày tải lên: 21/07/2014, 17:20
Bearing Design in Machinery Episode 3 Part 4 pps
... other adjustment design) is accessible for adjustment during the operation of the machine. 13.11.2 Inner and Outer Ring Fits The inner or outer ring that is adjusted should move freely by means ... of a design where two long spacer sleeves are used for a NC Lathe spindle bearing arrangement is shown in Sec. 13.12. 13.11.4 Machine Tool Spindles The two most important requirements for machine ... spindle and bearings must be rigid. For this purpose, machine tool designs entail large diameter spindle and large bearings, in comparison to other machines with similar forces. More- over, to ensure...
Ngày tải lên: 21/07/2014, 17:20
