{"id":382,"date":"2023-06-20T03:12:22","date_gmt":"2023-06-20T03:12:22","guid":{"rendered":"https:\/\/physigeek.com\/pt\/engrenagens\/"},"modified":"2023-06-20T03:12:22","modified_gmt":"2023-06-20T03:12:22","slug":"engrenagens","status":"publish","type":"post","link":"https:\/\/physigeek.com\/pt\/engrenagens\/","title":{"rendered":"Engrenagens"},"content":{"rendered":"<p>Este artigo explica o que s\u00e3o engrenagens e para que s\u00e3o utilizadas. Assim voc\u00ea vai descobrir quais s\u00e3o as diferentes partes de uma engrenagem, quais s\u00e3o os diferentes tipos de engrenagens e, al\u00e9m disso, quais s\u00e3o as vantagens e desvantagens das engrenagens. <\/p>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"400\" height=\"225\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/engrenages.jpeg\" alt=\"engrenagens\" class=\"wp-image-7012\" srcset=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/engrenages-300x169.jpeg 300w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/engrenages.jpeg 400w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\"><\/figure>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%C2%BFQue-es-un-engranaje\"><\/span> O que \u00e9 uma engrenagem?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> Uma <strong>engrenagem<\/strong> \u00e9 um mecanismo composto por duas ou mais rodas dentadas engrenadas. Portanto, uma engrenagem serve para transmitir o movimento circular de uma engrenagem para outra atrav\u00e9s do contato de seus dentes.<\/p>\n<p> Deve-se notar que com uma engrenagem n\u00e3o s\u00f3 \u00e9 transmitido um movimento rotacional, mas tamb\u00e9m, dependendo da rela\u00e7\u00e3o entre o n\u00famero de dentes das duas rodas dentadas, a velocidade de rota\u00e7\u00e3o pode ser aumentada ou reduzida. <\/p>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"320\" height=\"251\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/engrenage.png\" alt=\"engrenagem\" class=\"wp-image-7014\" srcset=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/engrenage-300x236.png 300w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/engrenage.png 400w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\"><\/figure>\n<p> Numa engrenagem simples composta por duas rodas dentadas de tamanhos diferentes, distinguimos a <em>coroa<\/em> e o <em>pinh\u00e3o<\/em> :<\/p>\n<ul style=\"color:#4fd12f; font-weight: bold;\">\n<li style=\"margin-bottom:16px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Coroa<\/strong> : Esta \u00e9 a maior roda dentada da engrenagem.<\/span><\/li>\n<li style=\"margin-bottom:16px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Pinh\u00e3o<\/strong> : Esta \u00e9 a menor roda dentada da engrenagem.<\/span> <\/li>\n<\/ul>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Caracteristicas-de-los-engranajes\"><\/span> Caracter\u00edsticas da m\u00e1quina<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> As engrenagens possuem os seguintes par\u00e2metros caracter\u00edsticos:<\/p>\n<ul style=\"color:#4fd12f; font-weight: bold;\">\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Dentes<\/strong> : \u00c9 a parte da engrenagem que realiza a for\u00e7a de impulso e, portanto, transmite o movimento rotacional e a pot\u00eancia de uma engrenagem para outra.<\/span><\/li>\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Eixo<\/strong> : \u00e9 a parte cil\u00edndrica localizada no centro da engrenagem, sua fun\u00e7\u00e3o \u00e9 guiar o movimento rotacional da engrenagem.<\/span><\/li>\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Circunfer\u00eancia de passo<\/strong> : Esta \u00e9 a circunfer\u00eancia imagin\u00e1ria ao longo da qual os dentes da engrenagem se engrenam, de modo que as circunfer\u00eancias de passo de duas engrenagens engrenadas sejam tangentes.<\/span><\/li>\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Di\u00e2metro primitivo<\/strong> : este \u00e9 o di\u00e2metro da circunfer\u00eancia primitiva.<\/span><\/li>\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Circunfer\u00eancia externa<\/strong> : Esta \u00e9 a circunfer\u00eancia que limita o exterior da engrenagem.<\/span><\/li>\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Di\u00e2metro Externo<\/strong> : Este \u00e9 o di\u00e2metro da circunfer\u00eancia externa.<\/span><\/li>\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Circunfer\u00eancia interna<\/strong> : \u00c9 a circunfer\u00eancia que passa pela base dos dentes da engrenagem.<\/span><\/li>\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Di\u00e2metro interno<\/strong> : \u00e9 o di\u00e2metro da circunfer\u00eancia interna.<\/span><\/li>\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>\u00c2ngulo de press\u00e3o<\/strong> : \u00c9 o \u00e2ngulo formado pela dire\u00e7\u00e3o da for\u00e7a de contato entre duas engrenagens e a dire\u00e7\u00e3o da velocidade angular da engrenagem.<\/span><\/li>\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>N\u00famero de dentes<\/strong> : Este \u00e9 o n\u00famero total de dentes que a engrenagem possui. Geralmente \u00e9 representado pelo s\u00edmbolo Z.<\/span><\/li>\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>M\u00f3dulo<\/strong> : \u00e9 a rela\u00e7\u00e3o entre o di\u00e2metro primitivo (D <sub>p<\/sub> ) e o n\u00famero de dentes (Z) da engrenagem. Assim, a f\u00f3rmula para calcular o m\u00f3dulo de uma engrenagem \u00e9 a seguinte:<\/span><\/li>\n<p style=\"text-align:center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-08dc8d1029dfeb94c2caccb24c4bbb83_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"m=\\cfrac{D_p}{Z}\" title=\"Rendered by QuickLaTeX.com\" height=\"38\" width=\"64\" style=\"vertical-align: -12px;\"><\/p>\n<\/p>\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Passo<\/strong> : \u00e9 a dist\u00e2ncia entre um ponto em um dente e o mesmo ponto em um dente adjacente. Essa caracter\u00edstica das engrenagens \u00e9 muito importante, pois para que duas engrenagens engrenem, elas devem ter o mesmo passo. O passo de uma engrenagem \u00e9 igual ao n\u00famero pi multiplicado pelo seu di\u00e2metro primitivo e dividido pelo n\u00famero de dentes.<\/span> <\/li>\n<p style=\"text-align:center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-42d8eabffd328a01bd43aa956282a8cb_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"p=\\cfrac{\\pi\\cdot D_p}{Z}\" title=\"Rendered by QuickLaTeX.com\" height=\"38\" width=\"81\" style=\"vertical-align: -12px;\"><\/p>\n<\/p>\n<\/ul>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"580\" height=\"441\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/parties-dun-engrenage.png\" alt=\"partes de uma engrenagem\" class=\"wp-image-6921\" srcset=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/parties-dun-engrenage-300x228.png 300w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/parties-dun-engrenage.png 580w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\"><\/figure>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Tipos-de-engranajes\"><\/span> Tipos de engrenagens <span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Engranajes-rectos\"><\/span>engrenagens de dentes retos<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p> <strong>A engrenagem de dentes retos<\/strong> \u00e9 um tipo de engrenagem cujos dentes s\u00e3o retos. Portanto, a principal caracter\u00edstica das engrenagens de dentes retos \u00e9 que s\u00e3o um tipo de engrenagem muito simples, pois s\u00e3o cilindros com dentes que se projetam radialmente. <\/p>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"215\" height=\"235\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/engrenage-droit.png\" alt=\"engrenagem de dentes retos\" class=\"wp-image-6502\"><\/figure>\n<p> Resumindo, ao contr\u00e1rio de outros tipos de engrenagens, como engrenagens helicoidais e engrenagens c\u00f4nicas, os dentes das engrenagens de dentes retos s\u00e3o completamente retos.<\/p>\n<p> No n\u00edvel industrial, as engrenagens de dentes retos s\u00e3o o tipo de engrenagem mais utilizado devido \u00e0 sua simplicidade e pre\u00e7o econ\u00f4mico.<\/p>\n<p> As engrenagens retas podem ser classificadas em dois tipos:<\/p>\n<ul style=\"color:#4fd12f; font-weight: bold;\">\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Engrenagens de dentes retos externos<\/strong> : Os dentes da engrenagem ficam no perfil externo da engrenagem, ou seja, na parte externa da roda.<\/span><\/li>\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Engrenagens de dentes retos internos<\/strong> \u2013 Os dentes da engrenagem ficam no perfil interno da engrenagem, ou seja, na parte interna da roda.<\/span> <\/li>\n<\/ul>\n<div class=\"wp-block-columns is-layout-flex wp-container-3 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-text-align-center has-text-color has-medium-font-size\" style=\"color:#4fd12f\"> <strong>Engrenagem externa<\/strong> <\/p>\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/engrenages-cylindriques.jpeg\" alt=\"engrenagens de dentes retos externos\" class=\"wp-image-6130\" width=\"250\" height=\"125\"><\/figure>\n<\/div>\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-text-align-center has-text-color has-medium-font-size\" style=\"color:#4fd12f\"> <strong>Engrenagem interna<\/strong> <\/p>\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/train-a-engrenages-planetaires-ou-epicycloidaux.png\" alt=\"engrenagens de dentes retos internos\" class=\"wp-image-6275\" width=\"245\" height=\"182\" srcset=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/train-a-engrenages-planetaires-ou-epicycloidaux-300x225.png 300w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/train-a-engrenages-planetaires-ou-epicycloidaux.png 640w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\"><\/figure>\n<\/div>\n<\/div>\n<p> As engrenagens de dentes retos externos s\u00e3o capazes de engrenar com engrenagens externas e internas. Em contraste, as engrenagens de dentes retos internos s\u00f3 podem engrenar com as engrenagens externas.<\/p>\n<p> Duas engrenagens externas engatadas t\u00eam sentidos de rota\u00e7\u00e3o opostos; no entanto, uma engrenagem interna gira na mesma dire\u00e7\u00e3o que a engrenagem externa com a qual est\u00e1 engatada.<\/p>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Engranajes-helicoidales\"><\/span> engrenagens helicoidais<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p> A <strong>engrenagem helicoidal<\/strong> consiste em rodas dentadas cujos dentes s\u00e3o inclinados em rela\u00e7\u00e3o ao eixo de rota\u00e7\u00e3o. Em outras palavras, as engrenagens helicoidais s\u00e3o um tipo de engrenagem cujo perfil consiste em dentes helicoidais. <\/p>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"360\" height=\"313\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/exemples-dengrenages-helicoidaux.jpeg\" alt=\"engrenagens helicoidais\" class=\"wp-image-6398\" srcset=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/exemples-dengrenages-helicoidaux-300x261.jpeg 300w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/exemples-dengrenages-helicoidaux.jpeg 360w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\"><\/figure>\n<p> O \u00e2ngulo que os dentes de uma engrenagem helicoidal formam com seu eixo de rota\u00e7\u00e3o depende da velocidade angular que ela deve transmitir:<\/p>\n<ul>\n<li> Se a velocidade angular transmitida for baixa, o \u00e2ngulo dever\u00e1 estar entre 5\u00ba e 10\u00ba.<\/li>\n<li> Se a velocidade angular transmitida for m\u00e9dia, o \u00e2ngulo dever\u00e1 estar entre 15\u00ba e 25\u00ba.<\/li>\n<li> Se a velocidade angular transmitida for alta, o \u00e2ngulo dever\u00e1 ficar em torno de 30\u00ba.<\/li>\n<\/ul>\n<p> Resumindo, o funcionamento de uma engrenagem helicoidal \u00e9 semelhante ao de uma engrenagem reta, pois sua fun\u00e7\u00e3o \u00e9 transmitir o movimento rotacional. No entanto, as engrenagens helicoidais permitem a transmiss\u00e3o do movimento circular de uma forma diferente gra\u00e7as ao formato particular dos seus dentes.<\/p>\n<p> As engrenagens helicoidais s\u00e3o classificadas nos seguintes tipos:<\/p>\n<ul style=\"color:#4fd12f; font-weight: bold;\">\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Engrenagens helicoidais do eixo cruzado<\/strong> : Os eixos das engrenagens helicoidais se cruzam. Este \u00e9 o tipo mais simples de engrenagens helicoidais.<\/span><\/li>\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Engrenagens helicoidais com eixos paralelos<\/strong> : Os eixos das engrenagens helicoidais s\u00e3o paralelos. Para que funcionem corretamente, os dentes das duas engrenagens acopladas devem ter o mesmo \u00e2ngulo de inclina\u00e7\u00e3o, mas em dire\u00e7\u00f5es opostas. Neste tipo de engrenagem helicoidal, a for\u00e7a axial \u00e9 produzida al\u00e9m da pot\u00eancia rotacional transmitida.<\/span><\/li>\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Engrenagens helicoidais duplas (ou engrenagens helicoidais em espinha)<\/strong> : o perfil deste tipo de engrenagens helicoidais \u00e9 formado por dois dentes helicoidais, formando assim um perfil em forma de V. Os dentes duplos deste tipo de engrenagem helicoidal servem para eliminar a for\u00e7a axial que surge quando os eixos est\u00e3o paralelos.<\/span> <\/li>\n<\/ul>\n<div class=\"wp-block-columns is-layout-flex wp-container-7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-text-align-center has-text-color has-medium-font-size\" style=\"color:#4fd12f\"> <strong>Engrenagens helicoidais de eixo transversal<\/strong> <\/p>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"250\" height=\"131\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/engrenages-helicoidaux-a-arbre-transversal.jpeg\" alt=\"engrenagem helicoidal de eixo cruzado\" class=\"wp-image-6404\"><\/figure>\n<\/div>\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-text-align-center has-text-color has-medium-font-size\" style=\"color:#4fd12f\"> <strong><strong>Engrenagens helicoidais com eixos paralelos<\/strong><\/strong> <\/p>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"250\" height=\"143\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/engrenages-helicoidaux.jpeg\" alt=\"rodas dentadas helicoidais\" class=\"wp-image-6132\"><\/figure>\n<\/div>\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-text-align-center has-text-color has-medium-font-size\" style=\"color:#4fd12f\"> <strong><strong>engrenagens helicoidais duplas<\/strong><\/strong> <\/p>\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/engrenages-a-double-helice.png\" alt=\"engrenagem helicoidal dupla\" class=\"wp-image-6402\" width=\"198\" height=\"173\"><\/figure>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Engranajes-conicos\"><\/span> Engrenagens c\u00f4nicas<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p> A <strong>engrenagem c\u00f4nica<\/strong> consiste em rodas dentadas cujos dentes t\u00eam formato c\u00f4nico. Simplificando, as engrenagens c\u00f4nicas s\u00e3o um tipo de engrenagem em forma de cone truncado.<\/p>\n<p> A principal caracter\u00edstica deste tipo de engrenagens \u00e9 que permitem transmitir um movimento rotacional entre dois eixos que se cruzam. Embora os eixos de um sistema de engrenagens c\u00f4nicas sejam normalmente perpendiculares, eles tamb\u00e9m podem ser projetados para operar em outro \u00e2ngulo. <\/p>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"350\" height=\"350\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/engrenages-coniques-1.jpeg\" alt=\"Engrenagens c\u00f4nicas\" class=\"wp-image-6421\" srcset=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/engrenages-coniques-1-300x300.jpeg 300w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/engrenages-coniques-1-150x150.jpeg 150w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/engrenages-coniques-1.jpeg 350w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\"><\/figure>\n<p> Geralmente, as engrenagens c\u00f4nicas s\u00e3o feitas de ferro fundido, ligas de a\u00e7o ou alum\u00ednio. Por\u00e9m, dependendo da utiliza\u00e7\u00e3o das engrenagens c\u00f4nicas, elas tamb\u00e9m podem ser fabricadas com materiais n\u00e3o met\u00e1licos, embora isso seja muito raro.<\/p>\n<p> Dentro das engrenagens c\u00f4nicas, v\u00e1rios subtipos de engrenagens podem ser distinguidos:<\/p>\n<ul style=\"color:#4fd12f; font-weight: bold;\">\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Engrenagens c\u00f4nicas de dentes retos<\/strong> : Tipo de engrenagem c\u00f4nica de dentes retos.<\/span><\/li>\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Engrenagens c\u00f4nicas com dentes helicoidais<\/strong> \u2013 Um tipo de engrenagem c\u00f4nica com dentes angulares.<\/span><\/li>\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Engrenagens c\u00f4nicas com dente espiral<\/strong> : Um tipo de engrenagem c\u00f4nica cujos dentes t\u00eam formato espiral.<\/span><\/li>\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Engrenagens c\u00f4nicas hip\u00f3ides<\/strong> : tipo de engrenagem c\u00f4nica cuja superf\u00edcie de passo \u00e9 hiperb\u00f3lica.<\/span> <\/li>\n<\/ul>\n<div class=\"wp-block-columns is-layout-flex wp-container-10 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-text-align-center has-text-color has-medium-font-size\" style=\"color:#4fd12f\"> <strong>Engrenagens c\u00f4nicas retas<\/strong> <\/p>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"260\" height=\"260\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/engrenages-coniques-a-dents-droites.jpeg\" alt=\"engrenagens c\u00f4nicas retas\" class=\"wp-image-6425\" srcset=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/engrenages-coniques-a-dents-droites.jpeg 260w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/engrenages-coniques-a-dents-droites-150x150.jpeg 150w\" sizes=\"auto, (max-width: 260px) 100vw, 260px\"><\/figure>\n<p class=\"has-text-align-center has-text-color has-medium-font-size\" style=\"color:#4fd12f\"><strong>Engrenagens c\u00f4nicas de dente espiral<\/strong> <\/p>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"400\" height=\"235\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/engrenages-coniques-en-spirale-en-forme-de-spirale.png\" alt=\"engrenagens c\u00f4nicas espirais, engrenagens c\u00f4nicas espirais\" class=\"wp-image-6432\" srcset=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/engrenages-coniques-en-spirale-en-forme-de-spirale-300x176.png 300w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/engrenages-coniques-en-spirale-en-forme-de-spirale.png 400w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\"><\/figure>\n<\/div>\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-text-align-center has-text-color has-medium-font-size\" style=\"color:#4fd12f\"> <strong>Engrenagens c\u00f4nicas de dentes helicoidais<\/strong> <\/p>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"250\" height=\"246\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/engrenages-coniques-helicoidaux.jpeg\" alt=\"engrenagens c\u00f4nicas helicoidais\" class=\"wp-image-6427\"><\/figure>\n<p class=\"has-text-align-center has-text-color has-medium-font-size\" style=\"color:#4fd12f\"><strong>Engrenagens c\u00f4nicas hip\u00f3ides<\/strong> <\/p>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"300\" height=\"198\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/engrenage-conique-hypoide.jpeg\" alt=\"engrenagem c\u00f4nica hip\u00f3ide\" class=\"wp-image-6434\"><\/figure>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Otros-tipos-de-engranajes\"><\/span> Outros tipos de engrenagens<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p> Geralmente, as engrenagens s\u00e3o classificadas em tr\u00eas tipos: engrenagens de dentes retos, helicoidais e c\u00f4nicas, conforme discutimos acima. No entanto, existem outros tipos de engrenagens que tamb\u00e9m s\u00e3o importantes que voc\u00ea conhe\u00e7a.<\/p>\n<ul style=\"color:#4fd12f; font-weight: bold;\">\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Sem-fim<\/strong> : No mecanismo sem-fim, um parafuso de engrenagem helicoidal engrena com uma engrenagem reta ou helicoidal. Desta forma, um movimento circular \u00e9 transmitido entre dois eixos perpendiculares.<\/span><\/li>\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Engrenagem de cremalheira<\/strong> : No mecanismo de cremalheira, uma roda dentada (pinh\u00e3o) engrena com uma cremalheira. Este tipo de engrenagem \u00e9 utilizado para transformar um movimento circular em um movimento linear.<\/span><\/li>\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Engrenagens de corrente<\/strong> : As engrenagens n\u00e3o engrenam entre si, mas o movimento circular das rodas dentadas \u00e9 transmitido por uma corrente.<\/span> <\/li>\n<\/ul>\n<div class=\"wp-block-columns is-layout-flex wp-container-14 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-text-align-center has-text-color has-medium-font-size\" style=\"color:#4fd12f\"> <strong>Parafuso sem-fim<\/strong> <\/p>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"450\" height=\"307\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/vis-sans-fin.jpeg\" alt=\"parafuso sem fim\" class=\"wp-image-5947\" srcset=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/vis-sans-fin-300x205.jpeg 300w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/vis-sans-fin.jpeg 450w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\"><\/figure>\n<\/div>\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-text-align-center has-text-color has-medium-font-size\" style=\"color:#4fd12f\"> <strong>engrenagem de cremalheira<\/strong> <\/p>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"493\" height=\"293\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/cremaillere.jpg\" alt=\"engrenagem de cremalheira\" class=\"wp-image-6703\" srcset=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/cremaillere-300x178.jpg 300w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/cremaillere.jpg 493w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\"><\/figure>\n<\/div>\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-text-align-center has-text-color has-medium-font-size\" style=\"color:#4fd12f\"> <strong><strong>engrenagens com corrente<\/strong><\/strong> <\/p>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"380\" height=\"230\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/engrenages-avec-chaine.jpeg\" alt=\"engrenagens com corrente\" class=\"wp-image-6629\" srcset=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/engrenages-avec-chaine-300x182.jpeg 300w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/engrenages-avec-chaine.jpeg 380w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\"><\/figure>\n<\/div>\n<\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Tren-de-engranajes\"><\/span> trem de engrenagens<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> Um <strong>trem de engrenagens<\/strong> \u00e9 um mecanismo de transmiss\u00e3o circular que consiste em um conjunto de engrenagens. Em outras palavras, um trem de engrenagens \u00e9 um sistema composto por diversas rodas dentadas interligadas.<\/p>\n<p> O trem de engrenagens permite uma rela\u00e7\u00e3o de transmiss\u00e3o muito maior do que uma \u00fanica engrenagem. Portanto, um trem de engrenagens serve para aumentar ou reduzir a velocidade angular de um eixo em maior extens\u00e3o do que uma \u00fanica engrenagem. Por outro lado, uma engrenagem geralmente ocupa mais espa\u00e7o do que uma simples engrenagem composta por duas rodas dentadas.<\/p>\n<p> Na imagem a seguir voc\u00ea pode ver um exemplo de trem de engrenagens, mais precisamente, \u00e9 um trem composto por cinco marchas: a marcha de entrada, uma marcha dupla, uma marcha lenta e a marcha de sa\u00edda. sa\u00edda. <\/p>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"600\" height=\"294\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/exemple-de-train-dengrenages.png\" alt=\"exemplo de trem de engrenagens\" class=\"wp-image-6265\" srcset=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/exemple-de-train-dengrenages-300x147.png 300w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/exemple-de-train-dengrenages.png 600w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\"><figcaption class=\"wp-element-caption\"><\/figcaption><\/figure>\n<p> O mecanismo come\u00e7a na roda de entrada, que \u00e9 a roda esquerda. Quando o movimento rotacional \u00e9 aplicado \u00e0 engrenagem de entrada, as engrenagens subsequentes tamb\u00e9m giram, uma vez que as rodas est\u00e3o engrenadas.<\/p>\n<p> Neste caso, a velocidade de rota\u00e7\u00e3o \u00e9 aumentada em duas etapas. Primeiro, a roda de entrada tem mais dentes que a engrenagem, ent\u00e3o a velocidade angular aumenta. Esta engrenagem \u00e9 uma engrenagem dupla que possui outra engrenagem acoplada ao seu eixo, sendo que a referida engrenagem tamb\u00e9m possui mais dentes que a engrenagem de sa\u00edda, portanto a velocidade angular aumenta pela segunda vez. <\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Relacion-de-transmision-de-un-engranaje\"><\/span> Rela\u00e7\u00e3o de transmiss\u00e3o de uma engrenagem<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> A <strong>rela\u00e7\u00e3o de transmiss\u00e3o<\/strong> \u00e9 a rela\u00e7\u00e3o entre as velocidades de rota\u00e7\u00e3o de duas engrenagens. Especificamente, a rela\u00e7\u00e3o de transmiss\u00e3o de duas engrenagens \u00e9 definida como a raz\u00e3o entre a velocidade angular da engrenagem de sa\u00edda e a velocidade angular da engrenagem de entrada.<\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-97af0b24bdb831157b691d9508c313a2_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"i=\\cfrac{\\omega_2}{\\omega_1}=\\cfrac{Z_1}{Z_2}=\\cfrac{D_1}{D_2}\" title=\"Rendered by QuickLaTeX.com\" height=\"41\" width=\"144\" style=\"vertical-align: -15px;\"><\/p>\n<\/p>\n<p style=\"margin-bottom:5px\"> Ouro: <\/p>\n<ul style=\"color:#4fd12f; font-weight: bold;\">\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-31318c5dcb226c69e0818e5f7d2422b5_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"i\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"6\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 a rela\u00e7\u00e3o de transmiss\u00e3o. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-237a06d6ffb9ecf1b88604147901eaa5_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\omega_1\" title=\"Rendered by QuickLaTeX.com\" height=\"11\" width=\"17\" style=\"vertical-align: -3px;\"><\/p>\n<p> \u00e9 a velocidade angular da roda de entrada. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-dda68f357f0855d943e55febd00343b3_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\omega_2\" title=\"Rendered by QuickLaTeX.com\" height=\"11\" width=\"18\" style=\"vertical-align: -3px;\"><\/p>\n<p> \u00e9 a velocidade angular da roda de sa\u00edda. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-7efd17fcc5a28b2aa83dbdfc45a99e1d_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"Z_1\" title=\"Rendered by QuickLaTeX.com\" height=\"15\" width=\"17\" style=\"vertical-align: -3px;\"><\/p>\n<p> \u00e9 o n\u00famero de dentes da engrenagem de entrada. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-f0a623c5e60ca8ad55847b5ae8b74589_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"Z_2\" title=\"Rendered by QuickLaTeX.com\" height=\"15\" width=\"18\" style=\"vertical-align: -3px;\"><\/p>\n<p> \u00e9 o n\u00famero de dentes da engrenagem de sa\u00edda. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-e263b7d8b237ebc903b5820b6c594a43_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"D_1\" title=\"Rendered by QuickLaTeX.com\" height=\"15\" width=\"21\" style=\"vertical-align: -3px;\"><\/p>\n<p> \u00e9 o di\u00e2metro da roda de entrada. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-c21fc78dd1af9a1401c06279b02a57cb_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"D_2\" title=\"Rendered by QuickLaTeX.com\" height=\"15\" width=\"22\" style=\"vertical-align: -3px;\"><\/p>\n<p> \u00e9 o di\u00e2metro da roda de sa\u00edda.<\/span><\/li>\n<\/ul>\n<p> Da f\u00f3rmula da rela\u00e7\u00e3o de transmiss\u00e3o, podemos deduzir o seguinte:<\/p>\n<ul style=\"color:#4fd12f; font-weight: bold;\">\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>i&gt;1<\/strong> : Se a rela\u00e7\u00e3o de transmiss\u00e3o for maior que 1, significa que a velocidade angular de sa\u00edda \u00e9 maior que a velocidade angular de entrada. Portanto, o n\u00famero de dentes e o di\u00e2metro da engrenagem de sa\u00edda s\u00e3o menores que o n\u00famero de dentes e o di\u00e2metro da engrenagem de entrada.<\/span><\/li>\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>i&lt;1<\/strong> : se a rela\u00e7\u00e3o de transmiss\u00e3o for menor que 1, isso significa que a velocidade angular de sa\u00edda \u00e9 menor que a velocidade angular de entrada. Portanto, o n\u00famero de dentes e o di\u00e2metro da engrenagem de sa\u00edda s\u00e3o maiores que o n\u00famero de dentes e o di\u00e2metro da engrenagem de entrada.<\/span><\/li>\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>i=1<\/strong> : se a rela\u00e7\u00e3o de transmiss\u00e3o for igual a 1, isso implica que a velocidade angular de sa\u00edda \u00e9 equivalente \u00e0 velocidade angular de entrada. Assim, o n\u00famero de dentes e o di\u00e2metro das duas rodas s\u00e3o id\u00eanticos.<\/span> <\/li>\n<\/ul>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ventajas-y-desventajas-de-los-engranajes\"><\/span> Vantagens e desvantagens das engrenagens<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> Em compara\u00e7\u00e3o com outros tipos de mecanismos de transmiss\u00e3o de movimento, as engrenagens apresentam as seguintes vantagens e desvantagens:<\/p>\n<p> <u style=\"text-decoration-color:#4fd12f\"><strong>Vantagens das engrenagens:<\/strong><\/u><\/p>\n<ul style=\"color:#4fd12f; font-weight: bold;\">\n<li style=\"margin-bottom:16px\"> <span style=\"color:#101010;font-weight: normal;\">N\u00e3o h\u00e1 possibilidade de escorregamento entre as marchas, reduzindo quebras do mecanismo.<\/span><\/li>\n<li style=\"margin-bottom:16px\"> <span style=\"color:#101010;font-weight: normal;\">As engrenagens podem transmitir altas pot\u00eancias.<\/span><\/li>\n<li style=\"margin-bottom:16px\"> <span style=\"color:#101010;font-weight: normal;\">O desempenho mec\u00e2nico das engrenagens \u00e9 alto.<\/span><\/li>\n<li style=\"margin-bottom:16px\"> <span style=\"color:#101010;font-weight: normal;\">Em geral, as engrenagens requerem pouca manuten\u00e7\u00e3o.<\/span><\/li>\n<li style=\"margin-bottom:16px\"> <span style=\"color:#101010;font-weight: normal;\">As engrenagens geralmente ocupam pouco espa\u00e7o.<\/span><\/li>\n<\/ul>\n<p> <u style=\"text-decoration-color:#4fd12f\"><strong>Desvantagens <u style=\"text-decoration-color:#4fd12f\">das <u style=\"text-decoration-color:#4fd12f\">engrenagens<\/u><\/u> :<\/strong><\/u><\/p>\n<ul style=\"color:#4fd12f; font-weight: bold;\">\n<li style=\"margin-bottom:16px\"> <span style=\"color:#101010;font-weight: normal;\">As engrenagens s\u00e3o dif\u00edceis de fazer.<\/span><\/li>\n<li style=\"margin-bottom:16px\"> <span style=\"color:#101010;font-weight: normal;\">Portanto, o pre\u00e7o das engrenagens costuma ser superior ao de outros tipos de mecanismos.<\/span><\/li>\n<li style=\"margin-bottom:16px\"> <span style=\"color:#101010;font-weight: normal;\">Embora o ru\u00eddo produzido dependa do tipo de equipamento utilizado, geralmente \u00e9 um sistema de transmiss\u00e3o de movimento ruidoso.<\/span><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Este artigo explica o que s\u00e3o engrenagens e para que s\u00e3o utilizadas. Assim voc\u00ea vai descobrir quais s\u00e3o as diferentes partes de uma engrenagem, quais s\u00e3o os diferentes tipos de engrenagens e, al\u00e9m disso, quais s\u00e3o as vantagens e desvantagens das engrenagens. O que \u00e9 uma engrenagem? Uma engrenagem \u00e9 um mecanismo composto por duas &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/physigeek.com\/pt\/engrenagens\/\"> <span class=\"screen-reader-text\">Engrenagens<\/span> Leia mais &raquo;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"","footnotes":""},"categories":[10],"tags":[],"class_list":["post-382","post","type-post","status-publish","format-standard","hentry","category-maquinas-e-mecanismos"],"yoast_head":"<!-- This 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