Thesis (M.S.)--University of Wisconsin--Madison, 1962. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaf [73]).

M.Ing. (Mechanical Engineering) / A hydromechanical traction system for a wheeled vehicle is being examined in order to generate information that will be applicable to the design of the drive system controller. The functional analysis of the drive system leads to the description of the system and component properties. A design methodology is proposed by which the system components could be dimensioned and the system layout constructed by taking into account the specified functional requirements concerning the system performance. An explicit description of power flow and manipulation of power flow in the drive system is given. The mechanisms by which the hydraulic machines are adjusted to manipulate power flow, are examined in detail so that their contribution to the dynamic behaviour of the total drive system can be described. , Experimental measurements are used to obtain a reliable description of the dynamic response of the adjustment mechanisms. An analytical model of the dynamic behaviour of the drive system is presented in block diagram format. The inherent multiple-input-multiple-output characteristic of the drive system with secondary controlled hydraulic motors is discussed. The block diagram is simplified to create linearized transfer functions that will depict the input-output-relationships. The effect of an accumulator on the dynamic response of the system is also given. Digital simulation programmes are constructed from the analytical model. The requirements of a vehicle traction system are interpreted and used as guidelines to conduct a functional design of the control system layout. The delivery of torque and the restriction of wheel spin for each of the wheel drive units, which is realised by secondary controlled hydraulic motors, are described in detail. A hypothetical drive system is considered and quantitive control system design information is generated, using the simulation programmes. Some aspects of the dynamic response of the system are discussed and it is shown that the adjustment mechanism has a big influence on the overall dynamic response of the system.

No description available.

No description available.

Thesis (Ph. D.)--University of Missouri-Columbia, 2000. / Typescript. Vita. Includes bibliographical references (leaves 190-192). Also available on the Internet.

Thesis (Ph. D.)--University of Missouri-Columbia, 2000. / Typescript. Vita. Includes bibliographical references (leaves 190-192). Also available on the Internet.

The diploma thesis deals with the modernization of test equiptment for the testing of hydraulic rotary elements (hydrogenerators and hydraulic motors), which are designed to ground machines, followed by organizational innovation of workplace and suggestion of manipulating device of hydraulic elements in AGROTEC Inc., the service center of building division Brno.

Kring en kärna av kompetens inom mekanisk verkstadsindustri har det ständigt tillverkats nya produkter vid AB Hägglund &amp; Söner med säte i Örnsköldsvik. Möbler, busskarosserier, flygplan, gruvlok, elektriska motorer, svetsmaskiner, fartygskranar och hydrauliska motorer är bara några exempel. Utvecklingen av nya produkter har skett i nära samarbete med kunder med vilka man haft långvariga affärsutbyten. Inom företaget har intresset och entusiasmen för nya produkter och konstruktioner varit en ständig drivkraft till ökad kunskap. Redan tidigt utvecklades en kultur och tradition av att gärna och med stor arbetsinsats ge sig in på svåra men utmanande och spännande projekt kring nya produkter. I denna empiriska del behandlas företagets omvandling under en period av sextio år. Med utgångspunkt från produkterna söker författaren beskriva förändring såväl i intern resursomvandling som externt i interaktion med kunder och leverantörer. Boken utgör den empiriska delen av "Ett industriföretags omvandling". / <p>Utgör jämte förf:s: "Ett industriföretags omvandling" diss. Stockholm : Handelshögsk</p>

Kring en kärna av kompetens inom mekanisk verkstadsindustri har det ständigt tillverkats nya produkter vid AB Hägglund &amp; Söner med säte i Örnsköldsvik. Möbler, busskarosserier, flygplan, gruvlok, elektriska motorer, svetsmaskiner, fartygskranar och hydrauliska motorer är bara några exempel. Utvecklingen av nya produkter har skett i nära samarbete med kunder med vilka man haft långvariga affärsutbyten. Inom företaget har intresset och entusiasmen för nya produkter och konstruktioner varit en ständig drivkraft till ökad kunskap. Redan tidigt utvecklades en kultur och tradition av att gärna och med stor arbetsinsats ge sig in på svåra men utmanande och spännande projekt kring nya produkter. I denna empiriska del behandlas företagets omvandling under en period av sextio år. Med utgångspunkt från produkterna söker författaren beskriva förändring såväl i intern resursomvandling som externt i interaktion med kunder och leverantörer. Boken utgör den empiriska delen av "Ett industriföretags omvandling".

Orientador: Nelson Luís Cappelli / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Agrícola / Made available in DSpace on 2018-08-21T09:12:28Z (GMT). No. of bitstreams: 1 Matos_Rafaelde_M.pdf: 3106025 bytes, checksum: 2cac9a3216fa59519a7f0746ec332829 (MD5) Previous issue date: 2012 / Resumo: O crescimento da demanda por cana-de-açúcar e a necessidade de agilidade no processamento do produto, levou o setor agrícola a buscar sistemas de colheita de maior capacidade no campo. No entanto, as colhedoras ainda apresentam alguns pontos críticos em função da qualidade de trabalho devido aos diversos tipos de perdas do produto durante a colheita. A maioria das deficiências encontradas na colhedora podem ser eliminadas, ou pelo menos minimizadas, com a adoção de inovações tecnológicas que permitam a operação otimizada e precisa de diversos de seus subsistemas. Alguns sistemas da colhedora, como por exemplo o circuito do extrator primário, ainda não apresentam um projeto bem definido para os diferentes modelos de colhedoras. Por isso, para começar a haver uma melhora nesse circuito, a análise do consumo de potência de todo esse sistema de limpeza, com valores de potência consumida e instalada, poderia ajudar a entender melhor seu funcionamento. O objetivo deste trabalho foi avaliar a demanda de potência hidráulica no motor hidráulico, instalado no extrator primário da colhedora de cana-de-açúcar, em condições de regime de operação da máquina, além de analisar a relação entre a potência instalada no circuito e a potência consumida. Para isso, instrumentaram-se dois modelos de colhedora e foram realizados quatro ensaios para aquisição de dados de vazão hidráulica e diferencial de pressão no motor hidráulico do extrator, considerando a máquina parada no pátio de uma oficina e operando em campo. Com a máquina parada, ou seja, sem fluxo mássico de cana e impureza proveniente da cana passando pelo ventilador, a potência consumida pelo motor foi de 14,75 kW para uma velocidade angular de 104,7 rad s-1. Já com a colhedora operando em campo, com fluxo mássico de matéria seca passando pelo sistema de limpeza, os resultados foram superiores ao dobro encontrado para os testes com a colhedora parada. Quando comparados à potência nominal instalada, apresentam valores de potência hidráulica consumida de 30 a 50% da potência nominal, o que indica o superdimensionamento de potência dos motores do extrator primário / Abstract: The growing demand of sugar cane and the need for agility in the processing of this product, the agricultural sector led to seek cropping systems with greater capacity in the field. However, the sugar cane harvesters still have some critical points depending on the quality of work due to various types of product losses during harvest. Most of the deficiencies found in the harvester can be eliminated, or at least minimized, with the adoption of technological innovations that allow an optimal operation of its various subsystems. Some systems of the harvester such as the circuit of the primary extractor, does not have a welldefined design for different models of harvesters. So to start an improvement in this circuit, the analysis of power consumption of its cleaning system, with values of power consumed and installed, could help to better understand its operation. The objective of this study was to evaluate the demand for hydraulic power of the hydraulic motor installed on the primary extractor of sugar cane harvesters in terms of machine operation system and analyze the relationship between the installed power in the circuit and power consumed. For this, two models of combines were used in four tests, that were performed for data acquisition of hydraulic flow and differential pressure in the extractor's hydraulic motor, considering the machine stopped in the courtyard and working in the field. With the machine stopped, in other words without mass flow of sugar cane and impurity passing through the fan, the power consumed by the motor was 14.75 kW with an angular velocity of 104.7 rad s-1. In the field operation with mass flow through the cleaning system, the results were more than twice found for the tests with the harvester stopped. When compared to the nominal power installed, the values of hydraulic power consumed ranged from 30 to 50% of rated output, which indicates the overestimation of the power in the primary motor of the extractor / Mestrado / Maquinas Agricolas / Mestre em Engenharia Agrícola