Construção e balanceamento de um cilindro a alta rotação
Autor(a) principal: | |
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Data de Publicação: | 1977 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFRJ |
Texto Completo: | http://hdl.handle.net/11422/3577 |
Resumo: | It was developed a high speed rotor modelas a basis for a further study on dynamic of gases. We have obtained a model structure consisting of two round bases (where are fixed the bearings), spaced by three small columns. This assembly has one of its ends fixed to a bench. The rotor consists of three parts: two shaft-plates fitted each one at the ends of a hollow cilinder made with acrilic. Since we have this model carefully machined and assembled we have proceed toward the dynamic balance of the system. That was obtained through the vibration measurement at each one of the shaft-plates in three different arrangements: 1. the rotor as built up. 2. the rotor with a known weight in one of the shaft-plates. 3. the rotor with the sarne known weight at the other shaft- plate. So we have known the position and magnitude of its largest vibration and then we are able to balance the system. For the above mentioned measurements we have used a sensor specialls developed for measuring radial displacemenxs, in arder of micra, and also equipments for recording the vibrations detected by those sensors. At first have been used for recording a tape-recorder and an oscilograph. However these equipment was not adequate dueto the noise added to the sensors input signal by the tape-recorder. Also there have been demonstrated that the oscilograph could not respond quickly enough to the frequency generated by the sensors. Therefore it was used an osciloscopy anda Polaroid camera in order to register graphically the vibration amplitudes. We have concluded that in the shaft-plate close to the bench there was no vibration at all, however in the upper plate the vibration was considerable. Then the rotor was dinamically balanced using the ''discmethod". The results were well satisfactory, proving in that way the viability of the method. |
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Construção e balanceamento de um cilindro a alta rotaçãoRotorDinâmica dos gasesVibrações de máquinasCNPQ::ENGENHARIAS::ENGENHARIA MECANICA::PROJETOS DE MAQUINASIt was developed a high speed rotor modelas a basis for a further study on dynamic of gases. We have obtained a model structure consisting of two round bases (where are fixed the bearings), spaced by three small columns. This assembly has one of its ends fixed to a bench. The rotor consists of three parts: two shaft-plates fitted each one at the ends of a hollow cilinder made with acrilic. Since we have this model carefully machined and assembled we have proceed toward the dynamic balance of the system. That was obtained through the vibration measurement at each one of the shaft-plates in three different arrangements: 1. the rotor as built up. 2. the rotor with a known weight in one of the shaft-plates. 3. the rotor with the sarne known weight at the other shaft- plate. So we have known the position and magnitude of its largest vibration and then we are able to balance the system. For the above mentioned measurements we have used a sensor specialls developed for measuring radial displacemenxs, in arder of micra, and also equipments for recording the vibrations detected by those sensors. At first have been used for recording a tape-recorder and an oscilograph. However these equipment was not adequate dueto the noise added to the sensors input signal by the tape-recorder. Also there have been demonstrated that the oscilograph could not respond quickly enough to the frequency generated by the sensors. Therefore it was used an osciloscopy anda Polaroid camera in order to register graphically the vibration amplitudes. We have concluded that in the shaft-plate close to the bench there was no vibration at all, however in the upper plate the vibration was considerable. Then the rotor was dinamically balanced using the ''discmethod". The results were well satisfactory, proving in that way the viability of the method.Desenvolveu-se um modelo de rotor que pudesse funcionar a altas rotações e com algumas particularidades visando um posterior estudo de dinâmica de gases. Obteve-se corro estrutura do modelo um conjunto formado por duas bases circulares (onde se localizam os mancais) separadas por três colunas, sendo o conjunto fixado a uma bancada. O rotor compõem-se de três peças: duas tampas-eixo encaixadas nas extremidades de um cilindro oco feito de acrílico translúcido. Construído e montado o modelo realizou-se o balanceamento dinâmico do rotor medindo-se a vibração na altura de cada tampa-eixo. Colocando-se o rotor a girar a uma determinada velocidade em três situações diferentes (com o rotor ''no estado com o acréscimo de um peso conhecido em uma das tampas – eixo e com acréscimo do mesmo peso na outra tampa-eixo)fica-se conhecendo posição e magnitude das maiores vibrações nesses três testes, podendo-se, a partir daí balancear o sistema. Utilizou-se para a medição da vibração: a) sensores especialmente desenvolvidos, capazes de detetar deslocamentos radiais do rotor, da ordem de micra; b) equipamento para registrar os sinais provenientes dos sensores. Primeiramente utilizou-se para registro um gravador e um oscilógrafo. Esse equipamento mostrou-se inadequado devido a introdução, pelo gravador de ruídos estranhos e devido a densificação de dados pelo oscilógrafo. Utilizou-se então para registro uma máquina fotográfica POLAROID acoplada a um osciloscópio. A caracterização da vibração foi feita graficamente a partir de ampliações das fotos feitas durante o teste. Concluiu-se que na tampa-eixo próxima da bancada não se detetava vibração e que na altura da outra tampa o nível de vibração era considerável. Balanceou-se o rotor na região onde a vibração se manifestava empregando-se o método do disco. Os resultados satisfatórios mostram a viabilidade do método desenvolvido.Universidade Federal do Rio de JaneiroBrasilInstituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de EngenhariaPrograma de Pós-Graduação em Engenharia MecânicaUFRJScieszko, Jan LeonQassim, Raad YahyaHsu, LiuRosenthal, Eric Lazare François2018-01-31T13:18:37Z2023-12-21T03:04:13Z1977-09info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesishttp://hdl.handle.net/11422/3577porinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRJinstname:Universidade Federal do Rio de Janeiro (UFRJ)instacron:UFRJ2023-12-21T03:04:13Zoai:pantheon.ufrj.br:11422/3577Repositório InstitucionalPUBhttp://www.pantheon.ufrj.br/oai/requestpantheon@sibi.ufrj.bropendoar:2023-12-21T03:04:13Repositório Institucional da UFRJ - Universidade Federal do Rio de Janeiro (UFRJ)false |
dc.title.none.fl_str_mv |
Construção e balanceamento de um cilindro a alta rotação |
title |
Construção e balanceamento de um cilindro a alta rotação |
spellingShingle |
Construção e balanceamento de um cilindro a alta rotação Rosenthal, Eric Lazare François Rotor Dinâmica dos gases Vibrações de máquinas CNPQ::ENGENHARIAS::ENGENHARIA MECANICA::PROJETOS DE MAQUINAS |
title_short |
Construção e balanceamento de um cilindro a alta rotação |
title_full |
Construção e balanceamento de um cilindro a alta rotação |
title_fullStr |
Construção e balanceamento de um cilindro a alta rotação |
title_full_unstemmed |
Construção e balanceamento de um cilindro a alta rotação |
title_sort |
Construção e balanceamento de um cilindro a alta rotação |
author |
Rosenthal, Eric Lazare François |
author_facet |
Rosenthal, Eric Lazare François |
author_role |
author |
dc.contributor.none.fl_str_mv |
Scieszko, Jan Leon Qassim, Raad Yahya Hsu, Liu |
dc.contributor.author.fl_str_mv |
Rosenthal, Eric Lazare François |
dc.subject.por.fl_str_mv |
Rotor Dinâmica dos gases Vibrações de máquinas CNPQ::ENGENHARIAS::ENGENHARIA MECANICA::PROJETOS DE MAQUINAS |
topic |
Rotor Dinâmica dos gases Vibrações de máquinas CNPQ::ENGENHARIAS::ENGENHARIA MECANICA::PROJETOS DE MAQUINAS |
description |
It was developed a high speed rotor modelas a basis for a further study on dynamic of gases. We have obtained a model structure consisting of two round bases (where are fixed the bearings), spaced by three small columns. This assembly has one of its ends fixed to a bench. The rotor consists of three parts: two shaft-plates fitted each one at the ends of a hollow cilinder made with acrilic. Since we have this model carefully machined and assembled we have proceed toward the dynamic balance of the system. That was obtained through the vibration measurement at each one of the shaft-plates in three different arrangements: 1. the rotor as built up. 2. the rotor with a known weight in one of the shaft-plates. 3. the rotor with the sarne known weight at the other shaft- plate. So we have known the position and magnitude of its largest vibration and then we are able to balance the system. For the above mentioned measurements we have used a sensor specialls developed for measuring radial displacemenxs, in arder of micra, and also equipments for recording the vibrations detected by those sensors. At first have been used for recording a tape-recorder and an oscilograph. However these equipment was not adequate dueto the noise added to the sensors input signal by the tape-recorder. Also there have been demonstrated that the oscilograph could not respond quickly enough to the frequency generated by the sensors. Therefore it was used an osciloscopy anda Polaroid camera in order to register graphically the vibration amplitudes. We have concluded that in the shaft-plate close to the bench there was no vibration at all, however in the upper plate the vibration was considerable. Then the rotor was dinamically balanced using the ''discmethod". The results were well satisfactory, proving in that way the viability of the method. |
publishDate |
1977 |
dc.date.none.fl_str_mv |
1977-09 2018-01-31T13:18:37Z 2023-12-21T03:04:13Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/11422/3577 |
url |
http://hdl.handle.net/11422/3577 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Universidade Federal do Rio de Janeiro Brasil Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia Programa de Pós-Graduação em Engenharia Mecânica UFRJ |
publisher.none.fl_str_mv |
Universidade Federal do Rio de Janeiro Brasil Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia Programa de Pós-Graduação em Engenharia Mecânica UFRJ |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFRJ instname:Universidade Federal do Rio de Janeiro (UFRJ) instacron:UFRJ |
instname_str |
Universidade Federal do Rio de Janeiro (UFRJ) |
instacron_str |
UFRJ |
institution |
UFRJ |
reponame_str |
Repositório Institucional da UFRJ |
collection |
Repositório Institucional da UFRJ |
repository.name.fl_str_mv |
Repositório Institucional da UFRJ - Universidade Federal do Rio de Janeiro (UFRJ) |
repository.mail.fl_str_mv |
pantheon@sibi.ufrj.br |
_version_ |
1815455970376024064 |