{"id":1978,"count":4,"description":"\r\n\r\n\r\n\r\nOBTER PRE\u00c7O DO ATUADOR DE V\u00c1LVULA DE CREMALHEIRA E PINH\u00c3O<\/strong><\/a>\r\n\r\n\r\n\r\n\r\n

O que \u00e9 o atuador de v\u00e1lvula de cremalheira e pinh\u00e3o?<\/h2>\r\n\r\n\r\n\r\n\r\nAtuadores de cremalheira e pinh\u00e3o s\u00e3o dispositivos mec\u00e2nicos usados para abrir e fechar automaticamente v\u00e1lvulas ou amortecedores, geralmente para aplica\u00e7\u00f5es industriais.\r\n\r\n\r\n\r\n\r\n\r\n\u201cRack and pinion\u201d is a generic term for a pair of gears that convert linear motion into rotational motion. A linear gear bar called \u201cthe rack\u201d engages teeth on a circular gear called \"the pinion\". The linear force exerted on the rack will cause a rotational motion of the pinion.\r\n\r\n\r\n\r\n\r\n\r\nPara automa\u00e7\u00e3o de v\u00e1lvulas, um projeto de atuador comum utiliza duas cremalheiras do tipo pist\u00e3o movendo-se em dire\u00e7\u00f5es opostas para garantir for\u00e7as equilibradas no pinh\u00e3o. Normalmente, a press\u00e3o de ar pneum\u00e1tica \u00e9 usada para alimentar o atuador. Ao aplicar press\u00e3o nas cremalheiras do pist\u00e3o, o pinh\u00e3o pode ser girado para a posi\u00e7\u00e3o desejada. A parte inferior do pinh\u00e3o se conecta \u00e0 haste da v\u00e1lvula para abrir e fechar a v\u00e1lvula conforme o pinh\u00e3o gira.\r\n\r\n\r\n\r\n\r\n

Componentes do atuador de v\u00e1lvula de cremalheira e pinh\u00e3o<\/h2>\r\n\r\n\r\n\r\n
\"\"<\/figure>\r\n\r\n\r\n\r\n

Caracter\u00edsticas do atuador de v\u00e1lvula de cremalheira e pinh\u00e3o<\/h2>\r\n\r\n\r\n\r\n\r\nOs atuadores pneum\u00e1ticos de cremalheira e pinh\u00e3o oferecem muitos recursos e benef\u00edcios para a atua\u00e7\u00e3o operacional de v\u00e1lvulas esfera, borboleta e macho.\r\n\r\n\r\n\r\n\r\n
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    • O design compacto e leve proporciona uma instala\u00e7\u00e3o f\u00e1cil com uma unidade de instala\u00e7\u00e3o e esquecimento virtual livre de manuten\u00e7\u00e3o. Seja qual for a sua localiza\u00e7\u00e3o, esta \u00e9 a escolha perfeita para uma instala\u00e7\u00e3o sem complica\u00e7\u00f5es.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
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        • O uso operacional variado fornece \u00e0s ind\u00fastrias e aplica\u00e7\u00f5es solu\u00e7\u00f5es de a\u00e7\u00e3o r\u00e1pida e \u00e0 prova de falhas para ciclos que exigem de uma a centenas de opera\u00e7\u00f5es por dia.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
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            • Despesas iniciais de baixo custo e ciclos de vida estendidos oferecem solu\u00e7\u00f5es econ\u00f4micas para equivalentes el\u00e9tricos caros. Quando atendidas corretamente, as companhias a\u00e9reas oferecem poucas desvantagens.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
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                • Instala\u00e7\u00f5es de montagem direta e plataformas ISO de padr\u00e3o internacional permitem montagem, teste e envio r\u00e1pidos para aplica\u00e7\u00f5es cr\u00edticas. V\u00e1lvulas solen\u00f3ides e interruptores de limite de v\u00e1lvula oferecem acr\u00e9scimos aparafusados.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
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                    • Clockwise or counterclockwise setup is available based on end users' requirements. In-House or In-Field adaption is offered as part of after sales or pre-installation supply service.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
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                        • V\u00e1rios revestimentos de prote\u00e7\u00e3o est\u00e3o dispon\u00edveis nos fabricantes como padr\u00e3o ou como adi\u00e7\u00e3o OEM. Isso inclui revestimentos RAL espec\u00edficos de PTFE, ep\u00f3xi, esmalte e marinho.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n\r\n\r\n

                          Rack \u00danico vs Design de Rack Duplo<\/h2>\r\n\r\n\r\n\r\n\r\nOs atuadores de cremalheira e pinh\u00e3o oferecem as mais amplas faixas de torque e rota\u00e7\u00e3o em compara\u00e7\u00e3o com outros mecanismos de convers\u00e3o para converter for\u00e7a linear em torque rotacional. Possui alta efici\u00eancia mec\u00e2nica e os torques que s\u00e3o capazes de produzir variam de alguns Nm a v\u00e1rios milhares de Nm.\r\n\r\n\r\n\r\n\r\n\r\nNo entanto, uma desvantagem potencial do design de cremalheira e pinh\u00e3o \u00e9 a folga. A folga ocorre quando as engrenagens da cremalheira e do pinh\u00e3o n\u00e3o est\u00e3o completamente alinhadas e h\u00e1 uma pequena folga entre cada conex\u00e3o de engrenagem. Este desalinhamento pode causar desgaste nas engrenagens durante o ciclo de vida do atuador, o que por sua vez aumenta a folga.\r\n\r\n\r\n\r\n\r\n\r\nUma unidade de cremalheira dupla utiliza um par de cremalheiras em lados opostos do pinh\u00e3o. Isto ajuda a eliminar a folga devido a uma for\u00e7a contr\u00e1ria e tamb\u00e9m duplica o torque de sa\u00edda da unidade e aumenta a efici\u00eancia mec\u00e2nica do sistema.\r\n\r\n\r\n\r\n\r\n

                          A\u00e7\u00e3o Simples vs A\u00e7\u00e3o Dupla<\/h2>\r\n\r\n\r\n\r\n\r\nEm um atuador de a\u00e7\u00e3o simples, o ar \u00e9 fornecido apenas para um lado do pist\u00e3o e \u00e9 respons\u00e1vel pelo movimento do pist\u00e3o em apenas uma dire\u00e7\u00e3o. O movimento do pist\u00e3o na dire\u00e7\u00e3o oposta \u00e9 realizado por uma mola mec\u00e2nica. Os atuadores de a\u00e7\u00e3o simples conservam o ar comprimido, mas realizam trabalho em apenas uma dire\u00e7\u00e3o. Uma desvantagem dos cilindros de a\u00e7\u00e3o simples \u00e9 a for\u00e7a de sa\u00edda inconsistente durante um curso completo devido \u00e0 for\u00e7a oposta da mola.\r\n\r\n\r\n\r\n\r\n\r\nEm um atuador de dupla a\u00e7\u00e3o, o ar \u00e9 fornecido \u00e0s c\u00e2maras em ambos os lados do(s) pist\u00e3o(\u00f5es). Uma press\u00e3o de ar mais elevada num lado pode conduzir o(s) pist\u00e3o(\u00f5es) para o outro lado. Atuadores de dupla a\u00e7\u00e3o s\u00e3o usados quando o trabalho precisa ser executado em ambas as dire\u00e7\u00f5es.\r\n\r\n\r\n\r\n\r\n\r\nUma das vantagens dos cilindros de dupla a\u00e7\u00e3o \u00e9 a for\u00e7a de sa\u00edda constante em toda a faixa de rota\u00e7\u00e3o. As desvantagens dos cilindros de dupla a\u00e7\u00e3o s\u00e3o a necessidade de ar comprimido para movimento em ambas as dire\u00e7\u00f5es e a falta de uma posi\u00e7\u00e3o definida em caso de falha de energia ou press\u00e3o.\r\n\r\n\r\n\r\n\r\n

                          Procedimento geral de solu\u00e7\u00e3o de problemas<\/h2>\r\n\r\n\r\n\r\n
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                          Problemas<\/td>\r\nInspe\u00e7\u00e3o<\/td>\r\nSolu\u00e7\u00f5es<\/td>\r\n<\/tr>\r\n
                          Pneumatic valve isn't working<\/td>\r\nA v\u00e1lvula solen\u00f3ide ou sua bobina est\u00e3o danificadas.\/As portas do solen\u00f3ide est\u00e3o obstru\u00eddas.<\/td>\r\nSubstitua a v\u00e1lvula solen\u00f3ide ou sua bobina. Remova os contaminantes presos \u00e0s portas do solen\u00f3ide.<\/td>\r\n<\/tr>\r\n
                          Pneumatic valve isn't working<\/td>\r\nTeste com o atuador sob press\u00e3o de alimenta\u00e7\u00e3o de ar, para verificar se h\u00e1 vazamentos nas veda\u00e7\u00f5es do pist\u00e3o e se h\u00e1 danos no atuador.<\/td>\r\nSubstitua as veda\u00e7\u00f5es do pist\u00e3o desgastadas ou o atuador danificado.<\/td>\r\n<\/tr>\r\n
                          Pneumatic valve isn't working<\/td>\r\nA v\u00e1lvula est\u00e1 obstru\u00edda com contaminantes.<\/td>\r\nRemova contaminantes ou substitua as pe\u00e7as danificadas.<\/td>\r\n<\/tr>\r\n
                          Pneumatic valve isn't working<\/td>\r\nThe valve is switched to manual\r\nmode.<\/td>\r\nGire a alavanca do redutor de volta para o modo pneum\u00e1tico.<\/td>\r\n<\/tr>\r\n
                          A v\u00e1lvula pneum\u00e1tica est\u00e1 agindo lentamente, lentamente<\/td>\r\nA press\u00e3o motriz est\u00e1 incorreta.<\/td>\r\nAumente a press\u00e3o de fornecimento de ar para 0,4-0,7Mpa.<\/td>\r\n<\/tr>\r\n
                          A v\u00e1lvula pneum\u00e1tica est\u00e1 agindo lentamente, lentamente<\/td>\r\nO atuador est\u00e1 subdimensionado com sa\u00edda de torque insuficiente.<\/td>\r\nSelecione o modelo correto do atuador.<\/td>\r\n<\/tr>\r\n
                          A v\u00e1lvula pneum\u00e1tica est\u00e1 agindo lentamente, lentamente<\/td>\r\nExistem problemas com a liga\u00e7\u00e3o da v\u00e1lvula ou com outras pe\u00e7as.<\/td>\r\nReajuste a liga\u00e7\u00e3o da v\u00e1lvula.<\/td>\r\n<\/tr>\r\n
                          A v\u00e1lvula pneum\u00e1tica est\u00e1 agindo lentamente, lentamente<\/td>\r\nA press\u00e3o do g\u00e1s de pot\u00eancia est\u00e1 muito baixa.\/A tubula\u00e7\u00e3o conectada ao g\u00e1s est\u00e1 entupida.<\/td>\r\nSubstitua os acess\u00f3rios por portas maiores.\/Remover bloqueio ou filtro<\/td>\r\n<\/tr>\r\n
                          N\u00e3o h\u00e1 indica\u00e7\u00e3o do interruptor limitado.<\/td>\r\nH\u00e1 uma falha na placa de alimenta\u00e7\u00e3o.<\/td>\r\nVerifique e repare a fonte de alimenta\u00e7\u00e3o.<\/td>\r\n<\/tr>\r\n
                          N\u00e3o h\u00e1 indica\u00e7\u00e3o do interruptor limitado.<\/td>\r\nA posi\u00e7\u00e3o do came do interruptor limitador n\u00e3o est\u00e1 na posi\u00e7\u00e3o precisa.<\/td>\r\nAjuste o came do interruptor limitado para a posi\u00e7\u00e3o correta.<\/td>\r\n<\/tr>\r\n
                          N\u00e3o h\u00e1 indica\u00e7\u00e3o do interruptor limitado.<\/td>\r\nO microinterruptor falhou.<\/td>\r\nSubstitua o microinterruptor.<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n","link":"https:\/\/zecovalve.com\/pt\/tag\/rack-and-pinion-actuators","name":"Atuadores de cremalheira e pinh\u00e3o","slug":"rack-and-pinion-actuators","taxonomy":"post_tag","meta":[],"yoast_head":"\nRack and Pinion Valve Actuator - Rack and Pinion Actuators | ZECO Valve<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/zecovalve.com\/pt\/tag\/rack-and-pinion-actuators\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Rack and Pinion Valve Actuator - Rack and Pinion Actuators | ZECO Valve\" \/>\n<meta property=\"og:description\" content=\"GET RACK AND PINION VALVE ACTUATOR PRICE What is Rack and Pinion Valve Actuator? Rack and pinion actuators are mechanical devices used to automatically open and close valves or dampers, usually for industrial applications. \u201cRack and pinion\u201d is a generic term for a pair of gears that convert linear motion into rotational motion. A linear gear bar called \u201cthe rack\u201d engages teeth on a circular gear called “the pinion”. The linear force exerted on the rack will cause a rotational motion of the pinion. For valve automation, a common actuator design uses two piston-type racks moving in opposite directions to ensure balanced forces on the pinion. Typically, pneumatic air pressure is used to power the actuator. By applying pressure to the piston racks, the pinion can be turned to the desired position. The pinion bottom connects to the valve stem to open and close the valve as the pinion turns. Components of Rack and Pinion Valve Actuator Features of Rack and Pinion Valve Actuator Pneumatic rack and pinion actuators offer many features and benefits for the operational actuation of the ball, butterfly, and plug valves. The compact and lightweight design provides an easy installation with a virtual maintenance free fit and forget unit. Whatever your location this is the perfect choice for hassle free installation. Varied operational usage provides industries and applications with fast acting, fail-safe solutions for cycles requiring single to hundreds of operations per day. Low initial cost outlays and extended life cycles offer cost-effective solutions to that expensive electric equivalents. When serviced correctly airlines provide little downside. Direct mount facilities and international standard iso platforms allow quick assembly, testing, and despatch for critical applications. Solenoid Valves & Valve Limit Switches offer bolt on additions. Clockwise or counterclockwise setup is available based on end users’ requirements. In-House or In-Field adaption is offered as part of after sales or pre-installation supply service. Multiple protection coatings are available from Manufacturers as standard or as an OEM addition. This includes PTFE, Epoxy, Enamel & Marine specific RAL coatings. Single Rack vs Dual Rack Design Rack-and-pinion actuators offer the widest ranges of torque and rotation compared to other conversion mechanisms for converting linear force to rotational torque. It has high mechanical efficiency and the torques that they are able to produce range from a couple of Nm to multiple thousands of Nm. However, one potential drawback of the rack-and-pinion design is backlash. Backlash occurs when rack and pinion gears are not completely aligned and there is a small gap between each geared connection. This misalignment can cause wear on the gears during the life cycle of the actuator, which in turn increases backlash. A double rack unit uses a pair of racks on opposite sides of the pinion. This helps eliminate backlash due to a counter force and also doubles the output torque of the unit and increases the mechanical efficiency of the system. Single Acting vs Double Acting In a single-acting actuator, the air is only supplied to one side of the piston and is responsible for the movement of the piston in only one direction. The movement of the piston in the opposite direction is performed by a mechanical spring. Single-acting actuators conserve compressed air but perform work in only one direction. A downside of single-acting cylinders is the inconsistent output force through a full stroke due to the opposing spring force. In a double-acting actuator, the air is supplied to chambers on both sides of the piston(s). Higher air pressure on one side can drive the piston(s) to the other side. Double-acting actuators are used when work needs to be performed in both directions. One of the advantages of double-acting cylinders is the constant output force through a full rotation range. The drawbacks of double-acting cylinders are their need for compressed air for movement in both directions and a lack of a defined position in case of a power or pressure failure. General Troubleshooting Procedure Problems Inspection Solutions Pneumatic valve isn’t working The solenoid valve or its coil is damaged.\/The solenoid ports are plugged. Replace the solenoid valve or its coil. Remove contaminants attached to the solenoid ports. Pneumatic valve isn’t working Test with the actuator under air supply pressure, to check the piston seals for leaking and the actuator for damage. Replace the worn down piston seals or damaged actuator. Pneumatic valve isn’t working The valve is plugged with contaminants. Remove contaminants or replace the damaged parts. Pneumatic valve isn’t working The valve is switched to manual mode. Turn the handle of gear operator back to pneumatic mode. Pneumatic valve is acting slowly, sluggishly The motive pressure is incorrect. Increase the air supply pressure to 0.4-0.7Mpa. Pneumatic valve is acting slowly, sluggishly The actuator is undersized with insufficient torque output. Select the correct actuator model. Pneumatic valve is acting slowly, sluggishly There are problems with the valve binding or the other parts. Re-adjust the valve binding. Pneumatic valve is acting slowly, sluggishly The power gas pressure is too low.\/The tubing connected to the gas is plugged. Replace the accessories with larger ports.\/Remove blockage or filter There is no indication from the limited switch. There is a power board failure. Check and repair the power supply. There is no indication from the limited switch. The position of the limited switch cam is not in accurate position. Adjust the limited switch cam to the correct position. There is no indication from the limited switch. The microswitch has failed. Replace the microswitch.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/zecovalve.com\/pt\/tag\/rack-and-pinion-actuators\" \/>\n<meta property=\"og:site_name\" content=\"ZECO Valve\" \/>\n<meta property=\"og:image\" content=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/12\/Components-of-Rack-and-Pinion-Valve-Actuator-1024x489.png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebSite\",\"@id\":\"https:\/\/zecovalve.com\/#website\",\"url\":\"https:\/\/zecovalve.com\/\",\"name\":\"ZECO Valve\",\"description\":\"Industrial Ball Valve, Gate Valve and Globe Valve Manufacturer\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":\"https:\/\/zecovalve.com\/?s={search_term_string}\",\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"pt-PT\"},{\"@type\":\"CollectionPage\",\"@id\":\"https:\/\/zecovalve.com\/tag\/rack-and-pinion-actuators#webpage\",\"url\":\"https:\/\/zecovalve.com\/tag\/rack-and-pinion-actuators\",\"name\":\"Rack and Pinion Valve Actuator - Rack and Pinion Actuators | ZECO Valve\",\"isPartOf\":{\"@id\":\"https:\/\/zecovalve.com\/#website\"},\"breadcrumb\":{\"@id\":\"https:\/\/zecovalve.com\/tag\/rack-and-pinion-actuators#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/zecovalve.com\/tag\/rack-and-pinion-actuators\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/zecovalve.com\/tag\/rack-and-pinion-actuators#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"item\":{\"@type\":\"WebPage\",\"@id\":\"https:\/\/zecovalve.com\/\",\"url\":\"https:\/\/zecovalve.com\/\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"position\":2,\"item\":{\"@type\":\"WebPage\",\"@id\":\"https:\/\/zecovalve.com\/tag\/rack-and-pinion-actuators\",\"url\":\"https:\/\/zecovalve.com\/tag\/rack-and-pinion-actuators\",\"name\":\"Rack and Pinion Actuators\"}}]}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","_links":{"self":[{"href":"https:\/\/zecovalve.com\/pt\/wp-json\/wp\/v2\/tags\/1978","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zecovalve.com\/pt\/wp-json\/wp\/v2\/tags"}],"about":[{"href":"https:\/\/zecovalve.com\/pt\/wp-json\/wp\/v2\/taxonomies\/post_tag"}],"wp:post_type":[{"href":"https:\/\/zecovalve.com\/pt\/wp-json\/wp\/v2\/posts?tags=1978"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}