5 resultados para Needle bearings

em Repositório Institucional da Universidade Estadual de São Paulo - UNESP


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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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A gear Box in a Baja SAE vehicle is required due to the objectives of the SAE competitions, which the vehicles are challenged to pass through different obstacles. A powertrain system has as the main objective the extension of the torque for the traction shaft of the vehicle, when compared to that one available in the engine. The Objective of this thesis is the description of a gear box project for a Baja SAE vehicle of the Piratas do Vale Team of Unesp Guaratinguetá. In the development of the thesis, a flowchart, developed by the team, was used, which includes a theory part and also the choice of shelf components. In this Project, the type of gearbox was chosen, besides the calculation of axles, gears, bearings and sealers, and software simulations were done for the critical parts. The transmission, developed in this thesis, is more complex than the current one used by the team, but the new one shows improvements, as a new reverse gear with high torque

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This work describes the development of an electro-mechanical micro-discharges device operating at ambient condition of pressure and temperature, capable to produce plasma jets for surface finishing. The discharges are produced through a needle shape electrode hollow cathode type by which flows the helium gas. The voltage applied on the electrode is provided for an AC/AC switching voltage converter of full-bridge topology. The converter is energized by a power line of 110/220 VAC, 60 Hz and gives a 1000 V peak-to-peak from 5 kHz to 40 kHz square waveform output. The output frequency is defined by a control signal provided by an external signal generator. The equipment setup includes output acquisition of voltage and current and a photo-detector for photo-electrical measurements, which allows an optical characterization of the plasma jet