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1
Durfy, Jennifer L. "Investigation of damping treatments for propeller shaft vibration." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0029/MQ65288.pdf.
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Suonperä, Nadja, and Annika Henrich. "Analysis of the propeller shaft program at Volvo Construction Equipment." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-14786.
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Volvo Construction Equipment’s driveline development department initiated this thesis work. It was calculated for two students working for 20 week period of time, which equals 30 hp each. The reason for Volvo CE to start the cooperation was the large number of variance of companion flanges and propeller shafts generating additional work for several departments within Volvo. The problem statement consisted of questions, which should result in information about the number of variants and combinations of propeller shafts and companion flanges used; the reason for the quantity of variants and what factors are affecting the choice of propeller shafts and companion flanges. They should also give answers to how article reduction can be implemented and what recommendations can be given to Volvo for the future. Using a Gantt chart as a planning tool helped the working process to progress in a structured way. Different methods of data collection were done to secure the problem understanding. Tools such as a literature review, function diagrams, and interviews were used to complete the data collection. Co-workers from the purchasing department and the part number reduction team were interviewed. Besides the in-house contact an opportunity was given to interview the suppliers during visits at their factories. Computer software was used as a resource of confirming information and mapping currently used components. The mapping process resulted in interesting findings, which were further researched. Together with the information from the interviews, reasons for the variety of used components were clarified. To deepen the problem understanding a more detailed variation mapping was made, showing what driveline components were generating most variants of companion flanges. The findings made and the recommendations received from the suppliers were unitized in a best case scenario. The questions from the problem statement were analyzed and answered. The recommendations given regarding to Volvo Construction Equipment’s propeller shaft program included guidelines for modularization. The success of modularization is based on among other factors, on particular documentation, continuous communication and close cooperation with the suppliers. This report can be defined as the first step towards a modularized propeller shaft program for Volvo CE’s haulers and wheel loaders.
3
Moores, Corwyn E. W. "Shaft and blade load measurements on a highly skewed propeller model in ice." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ62405.pdf.
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Федосенко, М. М. "Технологічне підготовлення заготівельного виробництва вилок карданних валів". Thesis, Чернігів, 2021. http://ir.stu.cn.ua/123456789/25308.
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Федосенко, М. М. Технологічне підготовлення заготівельного виробництва вилок карданних валів : випускна кваліфікаційна робота : 131 "Прикладна механіка" / М. М. Федосенко ; керівник роботи О. П. Космач ; НУ "Чернігівська політехніка", кафедра технологій машинобудування та деревообробки. – Чернігів, 2021. – 108 с.<br>У кваліфікаційній роботі магістра на основі сформульованих завдань здійснено технологічне підготовлення заготівельного виробництва вилок ковзання карданних валів.
В конструкторському розділі запропоновано удосконалення конструкції попереднього штампа для створення сприятливих умов формування кованки.
Запропоновано модернізацію ковочного пакету, що полягає в розміщенні поряд з ковочними штампами обрізного блоку.
В технологічному розділі розроблено технологічний процес виготовлення нижньої вставки попереднього рівчака та технологічний процес виготовлення кованки вилки ковзання.
В організаційному розділі проаналізовані організаційні аспекти технологічного підготовлення виробництва, здійснено організаційне проектування робочого місця коваля-штампувальника.
В заключних розділах роботи наведено розрахунки техніко-економічної ефективності проектних розробок. Запропоновані інженерні рішення з питань охорони праці.<br>In the master's qualification work, on the basis of the formulated tasks, the technological preparation of procurement production of sliding forks of cardan shafts was carried out.
In the design section, it is proposed to improve the design of the previous stamp to create favorable conditions for the formation of the forge. The modernization of the forging package is proposed, which consists in placing an edging block next to the forging stamps.
In the technological section the technological process of manufacturing the lower insert of the previous stream and the technological process of manufacturing the fork of the sliding fork were developed.
In the organizational section the organizational aspects of technological preparation of production are analyzed, the organizational design of the workplace of the blacksmith- puncher is carried out.
The final sections of the work provide calculations of technical and economic efficiency of project development. Engineering solutions on safety were proposed.
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Fredriksson, Robert, and Milovan Trkulja. "Fuel Efficiency in AWD-system." Thesis, Jönköping University, JTH, Mechanical Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-1589.
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<p>This degree project has been made in cooperation with engineers working for GM Engineering/Saab Automobile AB in Trollhättan. The given name by Saab for the project is “Fuel efficiency improvements in All Wheel Drive(AWD)-system”. The main tasks of this thesis work were to investigate the size of the power losses in different parts on the propeller shaft, to design a computer program that calculates</p><p>coordinates and angles on a propeller shaft and to investigate the possibilities to put together a simplified formula that calculates the natural frequencies on a propeller shaft.</p><p>The main parts of this report are a compilation of the theory about AWD and mostly about the parts on the propeller shaft, and also a description of the developed computer program called Propeller Shaft Calculator. This report doesn’t concern power losses in the different joints because there were no such general equations to be found. The most common way to calculate the power losses inside a joint is to do tests were the power loss is measured at different angles, torque and speed and then use that data to put together an approximated equation.</p><p>Most of the work on this project has been on theory studies and on programming. The main result of the project is the program Propeller Shaft Calculator.</p><p>Propeller Shaft Calculator is a program that is designed in Microsoft Excel. All the menus are programmed in the visual basic editor in Excel. The program is supposed to be used as a help while designing new propeller shafts.</p><p>Propeller Shaft Calculator can calculate all the coordinates, lengths, angles and directions on a propeller shaft. It also calculates natural frequencies, plunge, estimated power loss on the second shaft and angles in the joints. In the program you can choose to do calculations on four different configurations of propeller shafts but can quite</p><p>easy upgrade the program with more choices.</p><p>Basically the program works like this:</p><p>First you choose the right propeller shaft in the main menu. Then you fill out the indata sheet with coordinates, lengths, material data and so on. As you type in the input data the output data will appear in the out-data sheet next to the in-data. Every propeller shaft has also a calculations sheet were more detailed calculations can be</p><p>found.</p><p>The program also has a built in help function and a warning function that lights a warning sign next to the values if they are outside the limits.</p>
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Natter, Bernard. "Etude de l'usure et de l'ecaillage de pieces d'un reacteur d'avion par la technique d'activation en couches superficielles." Université Louis Pasteur (Strasbourg) (1971-2008), 1987. http://www.theses.fr/1987STR13223.
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Utilisation de la technique d'activation en couches superficielles. Formation du radioelement cobalt 56 par reaction nucleaire. Etude du profil de concentration et mesure in situ d'usure et d'ecaillage (cas des pompes a carburant). Aspects metallurgiques. Application a l'industrie aeronautique
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GUPTA, ABHIRAJ KUMAR. "OPTIMIZATION OF ROBO-MIG WELDING PARAMETERS FOR WELDING OF PROPELLER SHAFTS USING TAGUCHI DOE AND ANOVA." Thesis, 2023. http://dspace.dtu.ac.in:8080/jspui/handle/repository/20017.
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MIG Welding had been widely used in the industry since decades for welding purposes due to
its higher weld deposition rate, Ease of use, weld quality and Longer pass welding capability.
These all features of this welding process makes the process most prefered welding process for
the welding of propeller/Drive shaft. MIG has been proven as the easiest of all the welding
processes that uses arc. In automobile sector, its had been widely used. The process uses
continuously fed electrode to form the weld bead and joint formation. The process becomes
more robust and efficient when it is automated and robots are inherited with the welding
process.
The usage and combination of robots with MIG Welding makes it robust but it needs to be
optimized and process parameter like welding current, welding voltage, gas flow rate must be
of such value that prevents any kind of weld defects to be formed over the weld bead. The most
major issue that occurs while welding of propeller shafts is improper weld penetration and pin
holes. The main aim of this research was to find the optimized value of all the weld parameters
with the help of Taguchi design using minitab software and look for any other types of defects
while welding and to rectify them and make the process as robust as possible.
Addition of automation in any process makes it free from human errors that may occur.As
robots can perform repeatative tasks more efficiently we just have to teach them what they have
to do and they have to do that. MIG welding when combined with the robot can perform welding
at same point without any deviation in position and weld parameters like arc length. To maintain
arc length to be constant in MIG welding is almost impossible for any human being which
directly effects the weld quality and penetration.
An effort was undertaken to study the effects of using robotic arm for welding gun and effects
of various process parameters over the weld bead. When non optimized parameters were used
for the welding process there we have seen various defects in the final product.
8
Meng-Che, Wu, and 吳孟哲. "The Dynamic Simulation and Analysis of the Propeller Shaft." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/15973965068195175986.
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碩士<br>華梵大學<br>機電工程研究所<br>96<br>This essay is talking about the effects of each component exercising while simulating the equal speed of Rezppa Type universal joint used on the propeller shaft. The simulating method is to tear apart of the equal speed of Rezppa Type propeller shaft and use the Solid Words 3D drawing software to build the appearance. Then use CAE analysis software ADAMS to set up the parameter of each component and condition while exercising. Set up three different speed *1000rpm*, *2000rpm*, *3000rpm* to run the simulating with actual practicing.Through the simulation, we can understand the effects between Rezppa Type propeller shaft and steel ball while exercising.We can realize better the character of propeller shaft after the ADAMS simulation.
9
Liu, Chang, and 劉潛. "The Performance of The High-Speed Propeller at Inclined Shaft Condition." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/09817788887147949133.
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碩士<br>國立海洋大學<br>造船工程學系<br>85<br>This paper is aimed to study the performance of the propeller
under different cavitation numbers at inclined shaft condition,
and to compare the performance between the New-Section propeller
and the Newton-Rader propeller. In order to calculate the
effective thrust and the real efficiency for the craft, the
horizontal and vertical forces which are both created by the
propeller at inclined shaft are measured. When the inclined
shaft angle is 8 degrees and the advance coefficient is near the
propeller design point, the measrued vertical force is about 40%
~ 50% of the shaft thrust. And, the efficiency of the propeller
at 8-degree shaft inclination is significantly less than that of
the propeller with horizontal shaft. The experiment also shows
that the efficiency of the New-Section propeller is greater than
that of the Newton-Rader propeller at inclined shaft condition
regardless cavitation numbers. In addition, the "Unsteady
Propeller Lifting-Surface Theory" is applied to calculate the
vertical force produced by the propeller at inclined shaft
condition. Due to the simple mathmatical model about wake in
propeller theory, the computational results are much lower than
the measured values.
10
Wu, Jung-Fu, and 吳榮福. "Torsional-and-lateral-coupled vibration analysis of a shaft carrying an eccentric propeller." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/59467433705040127728.
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碩士<br>國立高雄海洋科技大學<br>輪機工程研究所<br>94<br>The object of this thesis is to study the vibration behaviour of the propulsive shafting system induced by a rotating marine propeller carrying single or multiple eccentric concentrated masses. To this end, the entire propulsive shafting system is firstly represented as a three-degree-of-freedom torsional-and-lateral-coupled vibration system. Then, the expressions for total kinetic energy and total potential energy of the entire propulsive shafting system are derived. Next, based on the theory of Lagrange’s equations, the equations of motion of the entire propulsive shafting system are derived and the mass matrix, damping matrix, stiffness matrix and external force vector of the entire vibrating system are determined. Finally, the forced vibration responses of the propulsion shafting system are obtained by solving the last equations of motion with Newmark direct integration method. Some factors closely relating to the current research topic, such as mass, total number and distribution of eccentric concentrated mass, etc, are investigated. From the numerical results, it is found that the influence of eccentric mass(es) of the propeller on the vibration characteristics of the propulsive shafting system is significant.
11
Chen, Shin-Zhou, and 陳信州. "The influence of propeller root geometries on cavitation pattern at inclined shaft condition." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/96301275270273425495.
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碩士<br>國立臺灣海洋大學<br>系統工程暨造船學系<br>96<br>Due to the inclined shaft condition, the angle of attack of high-speed propeller will be increased significantly, especially at the root of the propeller, when its blade rotate to 90 degrees circumferentially. It will make root erosion easily. Countermeasures such as increasing and reducing the chordlength, adopting trailing edge truncation and cupping at propeller root, are investigated. The test condition is at inclined shaft 10°,cavitation numbers are 0.75 & 0.6 . The K-J chart will be measured and the cavitation pattern at propeller root will be photographed.
From the results of the experiment, it is shown that chordlength reducing at propeller root make the cavitation easily to happen. At low cavitation number, the efficiency will be reduced remarkably. Cordlength increasing at propeller root, the cavitation would be improved at low cavitation number. Trailing edge truncation can control cavitation at propeller root efficiently. Cupping makes the cavitation stable from leading edge to trailing edge at root when the blade rotates to 90 degrees, and makes face cavitation when blade rotates to 270 degrees.
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李瓊惠. "On the Efficiency Increase of Propeller at Inclined Shaft Condition by Using Asymmetric Stator." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/65182750072407903202.
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碩士<br>國立海洋大學<br>造船工程研究所<br>87<br>The purpose of this thesis is to design an asymmetric stator fixed in front of the propeller at inclined shaft condition. This stator-propeller device is used to improve the propeller inflow, and therefore the loss of rotational kinetic energy of propeller and the vertical force produced by the propeller can be reduced to improve the efficiency of the propeller. Furthermore, this kind of design can also reduce the propeller cavitation.
In this thesis, a lifting line program developed at NTOU (National Taiwan Ocean University) is first adopted for calculating the optimum circulation distribution of the asymmetric stator and the propeller, and MIT-PBD10 is then used to determine the detailed propeller geometry.
Experiments of the designed stator-propeller model have been performed in the Medium Cavitation Tunnel at NTOU. The experimental results have been compared with those of the optimized single propeller with the new section geometry at the same design condition. The experimental results show that the efficiency of stator-propeller is 6.3%higher than that of propeller alone when operating at design condition. The efficiency of the stator-propeller is also improved by 6.3% when comparing to the optimized single propeller with new section geoetry. Notice that the torque and lifting force produced by asymmetric stator are about 58.2%,and 35% of the propeller, respectively, at the design condition, and the vertical force produced by propeller is about 18.3% of the propeller thrust which is one third smaller than that of single propeller.
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Guo, Zhe-Rong, and 郭哲榮. "Root unloading on the performance improvement of high-speed propeller at inclined shaft conditions." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/16023025129119698842.
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碩士<br>國立臺灣海洋大學<br>系統工程暨造船學系<br>92<br>The main objective of this thesis is to investigate the performance improvement of a root-unloading propeller operating at the inclined shaft condition. The high-speed propellers usually have a shaft inclination angle between 8 and 10 degrees, and this inclined shaft arrangement results in a non-uniform inflow to propellers. Previous testing data show that inclined shaft brings a negative influence to high pitch propellers, and strongly affects propeller loadings at inner radii. Therefore, a root unloading propeller, which has the reduced pitch and camber ratio at inner radii and the locally increased pitch at outer radii is tested in the NTOU medium cavitation tunnel at inclined shaft conditions. The experimental results are compared to the propeller having the same loading but without root unloading. It is found that unloading at propeller root can not only increase the efficiency remarkably at inclined shaft conditions, but also improve the root cavitation condition.
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CHANG, YUAN_CHEN, and 張原禎. "The influence of blade number on the performance of cavitating propeller at inclined shaft condition." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/33039304122828750027.
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碩士<br>國立海洋大學<br>造船工程學系<br>86<br>ABSTRACT
This thesis is aimed at designing a propeller which is
outstanding in performance, to serve as a parent
model of a new series for high speed patrol boats. A new
design procedure and philisophy is estabilished to design the
so- called new-section propeller. It is different from the
method used for conventional NACA a=0.8 section.
For the propeller of high speed craft , the performance
of the new-section prepeller is measured at different cavitation
numbers at the inclined shaft condition, and compared with that
of Newton- Rader propeller. The experimental results
show that both the efficiency of the new-section propeller
and the cavitation extension on blade are better than
those of the Newton-Rader propeller at the inclined shaft
condition regardless cavitation numbers. For propeller of
container ship, one of the most important issues is the
reduction of pressure fluctuation induced by a cavitating
propeller. Similarly, a design procedure and philisophy which
takes account of strength problem of blade due to high
skew is estabilished to design new-section
propellers. The results of experiment and calculation also show
that both the cavitation volume and the pressure
fluctuation on ship stern induced by new- section
propeller are much lower than those of NACA propeller.
15
Lee, Wen-Chi, and 李文琪. "Radial Loading Distribution on the Performance of High-Speed Propellers at Inclined Shaft Conditions." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/30288637064274880474.
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Chien, Cheng-Wei, and 簡政維. "The open water test of four blades End plate propeller with 0.95 EAR at inclined shaft conditions." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/869e39.
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碩士<br>國立臺灣海洋大學<br>系統工程暨造船學系<br>102<br>According to the test results of ENDP406, we designed a new 4-blades propeller ENDP406A which pitch is changeable. This propeller has 0.95 EAR and the angle of the end-plate is equal to -1.0. The open water test of ENDP406A is carried out in NTOU MCT at different cavitation numbers and pitch ratios at inclined shaft 8o and 10o.It will be investigated if the blade face cavitation when blade rotating to 270 o and the endplate face cavitation when blade rotating to 180o can be eliminated after the modification on the angle of attack of endplate, and the camber and pitch distribution on propeller blade. The performances of pitch ratios 1.2 and 1.6 at different cavitation numbers for inclined shaft 8o and 10o are also observed.
It is shown from the experimental results that the efficiency is improved when the pitch ratio is 1.4 at lower cavitation numbers. The cavitation phenomenon on pressure side have been controlled after the changes on camber and pitch ratio distributions. Because the pitch ratio 1.2 of ENDP406A is adjusted from 1.4, so that the pitch is too small near the tip. The efficiency is worse due to the sheet cavitation has been occurred on pressure side. However, the efficiency of pitch ratio 1.6 is good. When the propeller blade turns to 180o, the endplate cavitation on pressure side is disappeared for all pitch ratios. The experimental results can serve as a data base for design endplate propeller in future.
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Tsai, Cheng-Han, and 蔡承翰. "The open water test of four blades End plate propeller with 0.8 EAR at inclined shaft conditions." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/74656491408548268958.
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碩士<br>國立臺灣海洋大學<br>系統工程暨造船學系<br>103<br>According to the test results of ENDP401A, a new 4-blades propeller ENDP401B based on ship speed lower than 30 knots has been designed with two pitch ratio 1.3 and 1.1. This propeller has 0.8 EAR and has a 0.8 degree diffused angle for the end-plate. The open water test of ENDP401B is carried out in NTOU medium cavitation tunnel at different cavitation numbers and pitch ratios at inclined shaft 8 o and 10 o . The influence of the pitch and camber distribution near the propeller tip on the efficiency and cavitation will be investigated.
It is shown from the experimental results that the cavitation phenomenon on the pressure side and back side near the tip have been controlled at the pitch ratio 1.3. However, there is still a slight face cavitation at the pitch ratio 1.1. It can be improved by increased the pitch ratio or reduced the camber ratio. When the propeller blade turns to 0o, the end-plate has sheet cavitation on suction side due to the small diffused angle of the end-plate. If we increase the diffused angle of the end-plate to 1.0 degree, the sheet cavitation will be improved.