An automatic transmission is a device that is connected to the back of an engine and sends the power from the engine to the drive wheels. Its job is to keep the engine within a certain angular velocity. Although there are many epicyclic-type automatic transmissions in production, the related configuration design methods are still tedious and prone to human error. A simple and analytic methodology needs to be developed. Therefore, the purpose of this research is to present an efficient methodology for the systematic design of the epicyclic gear transmissions for automobiles. First, fundamentals and gear-shifting operations of the four-speed, five-speed and six-speed epicyclic-type automatic transmissions are illustrated to establish the design requirements. Second, based on the kinematic equations of the fundamental geared entities and the corresponding basic gear ratios, a procedure is applied to execute the kinematic and mechanical-efficiency analyses for the automatic transmissions. Third, two simple clutching-sequence synthesis methods are proposed and illustrated. One is based on the speed ratio equations, and another is based on the lever diagram. Next, a planar-graph representation is presented to arrange the desired clutches for each possible clutching sequence into the epicyclic gear mechanism. Then, the number of teeth of each gear is synthesized from assigning two or three desired speed ratios by the analytic method. Finally, a computer-aided design program for the clutching-sequence synthesis is developed with the considerations of the design requirements. With the above methods, the systematic designs of the 204 epicylic gear mechanisms are given for demonstrating the feasibility of the proposed methodology. The result of this work shows that the seven-link two-DOF epicylic gear mechanisms, the eight-link two-DOF Ravigneaux gear mechanism, and the nine-link two-DOF parallel-connected epicylic gear mechanisms could reach four-, six-, and six-forward speeds at most, respectively.

¡@An automatic transmission that is a transmission device between the engine and drive wheel, offers the vehicle while increasing and decreasing the speed mainly. Its job keeps the engine within a certain working rotational speed range.¡@Although there are many epicyclic-type automatic transmissions in production, the related design methods of lever diagram is not well developed.¡@Thus, the purpose of this research is to develop a systematic design of the epicyclic gear transmissions for automobiles with lever diagrammatical methodology.¡@First, fundamentals and gear-shifting operations of the four-speed and six-speed epicyclic-type automatic transmissions are illustrated to establish the design requirements.¡@Second, based on the basic theories of lever diagram, a procedure is applied to kinematic analysis for automatic transmission existed, and set up composite lever diagrams of 13 two-DOF seven-link epicyclic gear mechanisms and 190 two-DOF nine-link epicyclic gear mechanisms.¡@Next, a general clutching-sequence synthesis of lever diagrammatical method are proposed and illustrated. According to the limit range of lever dimensions established for four and five coaxial components, the clutching-sequences and the ranges of basic gear ratio of the feasible gear trains can be derived.¡@Finally, the planar-graph representation for arranging desired clutch and the number of teeth based on lever dimensions are applied to design six-forward speeds automatic transmission. The result of this work shows that the seven-link two-DOF epicylic gear mechanisms, and the nine-link two-DOF parallel-connected epicylic gear mechanisms could reach four- and six-forward speeds at most, respectively.

This master thesis deals with design of auxiliary crab trolley with load capacity 10t. Crab trolley moves along outdoor track of scrab yard. The target of this thesis is calculation and own design of travelling and lifting gear, strength calculation of frame and drawing documentation of a crane trolley assembly.

The objective of this diploma study is to develop and secure production of gear turbine with very low specific speed in comparison with conventional turbines. The first part of the work deals with already performed research of similar hydrostatic turbines. It is followed by construction design, including complete drawing documentation. The production of the prototype is secured by an external company. Finally, an experimental measurement of the characteristics of the designed turbine is performed in the laboratories of Fluid Engineering.

The goal of this thesis is to create a survey of possible design solutions to drive milling head. Evaluate them in terms of both economic and technical, then propose a universal milling head so that best met the requirements stated in the award of this work. MT, ÚVSSR, 2010, pages 96, picture 55

The thesis focuses on the design of an appropriate reconstruction of automobile gearboxes for racing cars. It describes the steps necessary to create the final solution. It also describes the work of the ATOS 3D scanner and software Engineer.

This diploma thesis deals with the model design for gearbox. The work is focused to its basic creation and optimization in programs of MBS ADAMS and ANSYS. It includes also short summary of contemporary solutions, which are used, and basic characterization of acoustic quantities.

No description available.

Detta projekt undersöker möjligheten att utveckla ett nytt verktyg för blåmärkning av kuggväxlar. Projektet görs i samarbete med Siemens Energy i Finspång som bland annt tillverkar Gasturbiner för energiförsörjning. Gasturbinerna förses med högpresterande växellådor som dimensioneras för att klara av stora belastningar. Under tillverkninsprocessen utförs blåmärkning på dessa kuggar för att försäkra sig att kontakten mellan kuggtänderna i växellådan uppkommer på rätt del av kuggparets kuggytor vid obelastad drift. Med hjälp av blåmärkning kan man vidta åtgärder som minskar risken för kantanligg vilket kan resultera i utmattningsbrott och haveri. Uppdragsgivaren har problem med att lagret blåmärkningsfärg som appliceras ofta blir för tjocjt eller ojämnt. Ett nytt verktyg utveckas i detta arbete för att lösa problemet. Det resulterande verktyget applicerar blåmärkningsfärgen med hjälp av en generisk tvättsvamp. Dess materialegenskaper tillåter svampen att återabsorbera överflödig färg som appliceras på kontaktytorna och på så sätt skapa ett jämt och lagom tunt lager mycket enklare och mer tillförlitligt än med exempelvis en målarborste, vilket är de verktyg som främst används idag. Svampapplikatorn är installerad i ett munstycke som kan skruvas på direkt på färgtuben för att leverera färgen direkt in i svampen, samt använda färgtuben som ett handtag för extra portabilitet. Till munstycket medföljer även ett ergonomiskt handtag som kan ersätta färgtuben som handtag vid behov. Överlag uppfyller lösningen syftet med arbetet och tillåter även en oerfaren arbetare att uppnå ett bättre resultat på blåmärkningen än med uppdragsgivarens nuvarande metoder. / This project explores the possibility of developing a new tool for gear tooth marking. The project is done in collaboration with Siemens Energy in Finspång, which is a manufacturer of gas turbines for energy supply among others. The gas turbines are equipped with high-performance gearboxes that are dimensioned to cope with large loads. During the manufacturing process, gear tooth markings are carried out on these gears to ensure that the contact between the gear teeth in the gearbox is distributed correctly, reducing the risks of uneven forces resulting in breakdown or early fatigue. The client is experiencing problems with the application of the paint that is applied during the gear tooth marking process. The paint is often applied too thick or unevenly. A new tool is developed in this project to solve this problem. The resulting tool applies the paint using a generic sponge. The properties of the material allows the sponge to reabsorb excess paint that has been applied to the contact surfaces and thus creates an even and sufficiently thin layer with greater ease and better reliability than with a paint brush, which is the tool most commonly used today by Siemens Energy. The sponge is installed into a nozzle that can be screwed directly onto the paint tube. The tube can then deliver the paint directly into the sponge, and the user can use the paint tube as a handle for added portability. The nozzle also comes with an ergonomic handle that can replace the paint tube as a handle if necessary. Overall, the solution fulfills the purpose of the project and allows even an in experienced worker toachieve a better result on the gear tooth marking than with the current methods used by Siemens Energy.

M. Tech. (Department of Metallurgical Engineering, Faculty of Engineering and Technology), Vaal University of Technology. / To meet the ever-increasing demand for maintenance of gear systems, industrial companies have traditionally depended on the shutdown of the machines before processing the fault diagnosis. Nowadays, online monitoring has proven to be effective in terms of machine state analysis and fault prediction. However, the application of such a technique in the analysis of combined multiple nonlinear faults is still a subject of research. The vibration signature of a coexisting nonlinear crack and pit in two-stage gear system is unknown, it can be regarded as one of the most difficult problems to extract and diagnose. Additionally, incorporating both a crack and a pit into numerical models is a time-consuming process that demands a breadth of mechanical understanding. Diagnostics of faulty gears, on the other hand, can be performed in the time and frequency domain or in the Time-Frequency domain, depending on the complexity of the vibration. Non-linear and non-stationary phenomena (Features) occur when repeated pitting and cracking faults occur, reducing the reliability of standard signal processing methods (Gear displacement and Fast Fourier Transform). This thesis solves each of these shortcomings by developing an eight-degree-of-freedom (DOF) gear model with a breathing crack and multiple pitted gear teeth. The identified spur-gear model enabled the investigation of the crack and pitting signatures and their effect on the ensuing vibrations independently of the action of other system components. Additionally, when pitting and cracking coexist, the study was conducted to determine the influence of such a failure on the transmission system. Theoretical results indicated that the presence of pitting and crack in the tooth of the gear resulted in a decrease in mesh stiffness. Additionally, the influence of the breathing pitting and crack results in material fatigue, which results in the generation of a random term in the vibration signal. To corroborate the acquired results, several experimental tests on a spur-gear test rig with a defined pit and crack size range were undertaken under a variety of conditions. In comparison to the presented methodologies, theoretical and experimental results indicate that 3D Frequency-RPM analysis is the most sensitive and resilient method for the early detection and identification of pit and crack faults. Furthermore, when crack or pit faults are studied individually, the STFT analysis yields interesting results. The feature analysis revealed that, when using the Time-Frequency technique, the crack and pit combination in a two-stage gear system is a priori more efficient than the other options.