Montagem e operação de uma bancada de levantamento de curvas características de bombas centrífugas
The concepts of fluid motion are used both in the design of new industrial plants and in solving problems in existing units. This phenomenon of mass transfer is present in almost all production processes in industry, and is one of the most important and expensive in the global production chain. T...
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| Formato: | bachelorThesis |
| Idioma: | pt_BR |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/50680 |
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| Resumo: | The concepts of fluid motion are used both in the design of new industrial plants
and in solving problems in existing units. This phenomenon of mass transfer is present in
almost all production processes in industry, and is one of the most important and
expensive in the global production chain. The transport of liquids is promoted by flow
machines called "pumps". Whenever there is a need to increase the working pressure or
the flow speed of a liquid we use centrifugal pumps. These accelerate the fluid by means
of the centrifugal force provided by the rotation of the pump impeller, thus providing kinetic
energy to the moving fluid and transforming the internal kinetic energy into pressure
energy at the impeller outlet. The industry presents the operating characteristics of a
centrifugal pump through graphs called performance characteristic curves. This study
aimed to build the main characteristic curves of a centrifugal pump and compare them with
the curves provided by the manufacturer's catalog. The pump used was a single-stage
Thebe THSI-18 with a 7.5 hp three-phase motor (220/380 V). With a 163mm closed cast
iron rotor. But to obtain the curves, a bench was built for testing pumps, which would help
in lifting the curves of several pumps, both submerged and centrifugal, so that they can be
assembled and disassembled quickly and with reduced risk of accidents. The manometric
height X flow rate and efficiency X flow rate curves were surveyed, the main curves that
translate the behavior of a hydraulic pump. Through the values collected and applied to the
theoretical equations, it was possible to obtain the curves, with the pump operating without
drowning. The results led to the conclusion that the characteristic curves with the pump
operating drowned assume the behavior governed by the theory and when the pump is
operating not drowned they do not reach the flow values expected by the manufacturer
and consequently are not close to the curves provided by the same. |
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