{"id":2240,"date":"2024-08-13T14:20:28","date_gmt":"2024-08-13T06:20:28","guid":{"rendered":"https:\/\/sj-gauge.com\/?p=2240"},"modified":"2026-04-15T19:01:01","modified_gmt":"2026-04-15T11:01:01","slug":"mechanical-gauge-internal-structures","status":"publish","type":"post","link":"https:\/\/www.sj-gauge.com\/vi\/mechanical-gauge-internal-structures\/","title":{"rendered":"C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a c\u00e1c lo\u1ea1i \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t c\u01a1 h\u1ecdc kh\u00e1c nhau l\u00e0 g\u00ec?"},"content":{"rendered":"<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a c\u00e1c lo\u1ea1i \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t c\u01a1 h\u1ecdc kh\u00e1c nhau l\u00e0 g\u00ec?<\/strong><br>Khi \u0111o \u00e1p su\u1ea5t, c\u00f3 th\u1ec3 l\u1ef1a ch\u1ecdn c\u00e1c lo\u1ea1i \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t kh\u00e1c nhau t\u00f9y thu\u1ed9c v\u00e0o ph\u01b0\u01a1ng ph\u00e1p \u0111o, m\u00f4i tr\u01b0\u1eddng v\u00e0 ngu\u1ed3n \u00e1p su\u1ea5t. SJ Gauge s\u1ebd gi\u00fap b\u1ea1n th\u00f4ng qua b\u00e0i vi\u1ebft n\u00e0y, b\u1ea1n s\u1ebd c\u00f3 c\u00e1i nh\u00ecn s\u00e2u s\u1eafc h\u01a1n v\u1ec1 c\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng b\u00ean trong c\u1ee7a \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t c\u01a1 h\u1ecdc.<\/p>\n<\/blockquote>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">M\u1ee5c l\u1ee5c<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"B\u1eadt\/t\u1eaft M\u1ee5c l\u1ee5c\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">B\u1eadt\/T\u1eaft<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #7b1e1c;color:#7b1e1c\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #7b1e1c;color:#7b1e1c\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.sj-gauge.com\/vi\/mechanical-gauge-internal-structures\/#1-bourdon-tube\" >1. \u1ed0ng Bourdon<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.sj-gauge.com\/vi\/mechanical-gauge-internal-structures\/#2-diaphragm\" >2. M\u00e0ng ng\u0103n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.sj-gauge.com\/vi\/mechanical-gauge-internal-structures\/#3-others\" >3. C\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1c<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-f998ef58004af8eb90d885f3f257272f\" id=\"h-1-bourdon-tube\"><span class=\"ez-toc-section\" id=\"1-bourdon-tube\"><\/span>1. \u1ed0ng Bourdon<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>H\u00e3y b\u1eaft \u0111\u1ea7u v\u1edbi th\u00e0nh ph\u1ea7n ch\u00ednh c\u1ee7a \u0111\u1ed3ng h\u1ed3 \u0111o \u1ed1ng Bourdon (c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u1ed1ng l\u00f2 xo). Ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111o c\u1ea3 ch\u1ea5t l\u1ecfng v\u00e0 kh\u00ed. C\u00f3 ba lo\u1ea1i: lo\u1ea1i C, lo\u1ea1i xo\u1eafn \u1ed1c v\u00e0 lo\u1ea1i xo\u1eafn \u1ed1c.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-1-c-type-bourdon-tube\">1-1. \u1ed0ng Bourdon lo\u1ea1i C:<\/h3>\n\n\n\n<p>\u1ed0ng Bourdon lo\u1ea1i C \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb \u1ed1ng r\u1ed7ng, th\u00e0nh m\u1ecfng, u\u1ed1n cong. Th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb \u0111\u1ed3ng ho\u1eb7c th\u00e9p kh\u00f4ng g\u1ec9, v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho \u00e1p su\u1ea5t t\u1eeb 0,6 \u0111\u1ebfn 70 kgf\/cm\u00b2, ch\u00fang l\u00e0 lo\u1ea1i \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t c\u01a1 h\u1ecdc ph\u1ed5 bi\u1ebfn nh\u1ea5t. G\u1eafn \u0111\u1ea7u m\u1edf v\u00e0o \u0111\u1ebf \u0111\u1ec3 k\u1ebft n\u1ed1i v\u1edbi ngu\u1ed3n \u00e1p su\u1ea5t v\u00e0 k\u1ebft n\u1ed1i \u0111\u1ea7u b\u1ecbt k\u00edn v\u1edbi b\u1ed9 truy\u1ec1n \u0111\u1ed9ng. Khi \u00e1p su\u1ea5t t\u00e1c \u0111\u1ed9ng, \u1ed1ng Bourdon u\u1ed1n cong s\u1ebd t\u1ea1o ra s\u1ef1 d\u1ecbch chuy\u1ec3n t\u01b0\u01a1ng \u1ee9ng do s\u1ef1 ch\u00eanh l\u1ec7ch \u00e1p su\u1ea5t, v\u00e0 kim ch\u1ec9 th\u1ecb s\u1ebd quay.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"201\" height=\"259\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/11\/01_SJ_C-type_Bourdon_Tube1.jpg\" alt=\"\" class=\"wp-image-2241\" style=\"width:300px\"\/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-2-helical-bourdon-tube\">1-2. \u1ed0ng Bourdon xo\u1eafn \u1ed1c:<\/h3>\n\n\n\n<p>\u0110\u1eb7c t\u00ednh u\u1ed1n cong \u0111a chi\u1ec1u c\u1ee7a \u1ed1ng Bourdon xo\u1eafn \u1ed1c gi\u00fap n\u00f3 ph\u00e2n t\u00e1n \u00e1p su\u1ea5t m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng. So v\u1edbi lo\u1ea1i C, lo\u1ea1i xo\u1eafn \u1ed1c c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c \u00e1p su\u1ea5t cao h\u01a1n. N\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho \u00e1p su\u1ea5t cao t\u1eeb 70 \u0111\u1ebfn 1000 kgf\/cm\u00b2. C\u00e0ng cao gi\u00e1 tr\u1ecb \u00e1p su\u1ea5t \u0111o \u0111\u01b0\u1ee3c, c\u00e0ng c\u1ea7n nhi\u1ec1u v\u00f2ng xo\u1eafn \u1ed1ng. Th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong ng\u00e0nh c\u00f4ng nghi\u1ec7p h\u00f3a d\u1ea7u, nh\u00e0 m\u00e1y \u0111i\u1ec7n v\u00e0 k\u1ef9 thu\u1eadt m\u00f4i tr\u01b0\u1eddng.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img decoding=\"async\" width=\"200\" height=\"179\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/11\/02_SJ_Helical_Bourdon_Tube2.png\" alt=\"\" class=\"wp-image-2242\" style=\"width:300px\"\/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-3-spiral-bourdon-tube\">1-3. \u1ed0ng Bourdon xo\u1eafn \u1ed1c:<\/h3>\n\n\n\n<p>\u1ed0ng Bourdon xo\u1eafn \u1ed1c \u0111\u01b0\u1ee3c u\u1ed1n cong theo c\u00e1c v\u00f2ng tr\u00f2n \u0111\u1ed3ng t\u00e2m. \u0110\u1ea7u \u1ed1ng \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp v\u1edbi kim ch\u1ec9 th\u1ecb, kh\u00f4ng s\u1eed d\u1ee5ng b\u00e1nh r\u0103ng ho\u1eb7c kh\u1edbp n\u1ed1i. C\u1ea5u tr\u00fac \u0111\u01a1n gi\u1ea3n c\u1ee7a n\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t c\u00f3 m\u1eb7t s\u1ed1 nh\u1ecf, nh\u01b0 b\u00ecnh oxy l\u1eb7n v\u00e0 b\u00ecnh ch\u1eefa ch\u00e1y.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img decoding=\"async\" width=\"209\" height=\"202\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/11\/03_SJ_Spiral_Bourdon_tube3.png\" alt=\"\" class=\"wp-image-2243\" style=\"width:300px\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-8bba35e1b2f3f6803e9944077621b813\" id=\"h-2-diaphragm\"><span class=\"ez-toc-section\" id=\"2-diaphragm\"><\/span>2. M\u00e0ng ng\u0103n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Ti\u1ebfp theo, ch\u00fang ta h\u00e3y xem x\u00e9t m\u1ed9t s\u1ed1 lo\u1ea1i \u0111\u1ed3ng h\u1ed3 \u0111o m\u00e0ng. C\u00f3 ba lo\u1ea1i: \u0111\u1ed3ng h\u1ed3 \u0111o m\u00e0ng li\u00ean k\u1ebft, \u0111\u1ed3ng h\u1ed3 \u0111o m\u00e0ng d\u1ea1ng v\u1ecf v\u00e0 \u0111\u1ed3ng h\u1ed3 \u0111o m\u00e0ng kh\u00f4ng c\u00f3 b\u00e1nh r\u0103ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-1-link-diaphragm\">2-1. M\u00e0ng li\u00ean k\u1ebft:<\/h3>\n\n\n\n<p>M\u00e0ng li\u00ean k\u1ebft ho\u1ea1t \u0111\u1ed9ng m\u00e0 kh\u00f4ng c\u1ea7n ch\u1ea5t l\u1ecfng l\u00e0m \u0111\u1ea7y h\u1ec7 th\u1ed1ng, \u0111i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o an to\u00e0n cho vi\u1ec7c \u0111o \u00e1p su\u1ea5t v\u00f4 tr\u00f9ng. C\u00e1c v\u1eadt li\u1ec7u m\u00e0ng th\u00f4ng d\u1ee5ng bao g\u1ed3m th\u00e9p kh\u00f4ng g\u1ec9, Teflon (PTFE), Hastelloy (Hastelloy) ho\u1eb7c g\u1ed1m. \u00c1p su\u1ea5t c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111o tr\u1ef1c ti\u1ebfp qua m\u00e0ng g\u1ee3n s\u00f3ng, sau \u0111\u00f3 \u00e1p su\u1ea5t s\u1ebd \u0111\u01b0\u1ee3c truy\u1ec1n qua li\u00ean k\u1ebft \u0111\u1ebfn b\u00e1nh r\u0103ng v\u00e0 kim ch\u1ec9. C\u00f3 th\u1ec3 \u00e1p d\u1ee5ng l\u1edbp l\u00f3t ho\u1eb7c ph\u1ee7 \u0111\u1ec3 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd s\u1eed d\u1ee5ng. C\u00e1c \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t m\u00e0ng li\u00ean k\u1ebft c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111o c\u00e1c m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n, ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong ng\u00e0nh n\u00e9n kh\u00ed ho\u1eb7c c\u00f4ng nghi\u1ec7p kh\u00ed.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"153\" height=\"200\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/11\/04_SJ_Link_diaphragm4.png\" alt=\"\" class=\"wp-image-2244\" style=\"width:300px\"\/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-2-gearless-diaphragm\">2-2. M\u00e0ng kh\u00f4ng c\u00f3 b\u00e1nh r\u0103ng:<\/h3>\n\n\n\n<p>C\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t m\u00e0ng kh\u00f4ng c\u00f3 b\u00e1nh r\u0103ng \u0111o \u00e1p su\u1ea5t tr\u1ef1c ti\u1ebfp th\u00f4ng qua s\u1ef1 co l\u1ea1i v\u00e0 gi\u00e3n ra c\u1ee7a m\u00e0ng \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a kim ch\u1ec9 th\u1ecb. Lo\u1ea1i c\u1ea3m bi\u1ebfn n\u00e0y kh\u00f4ng c\u1ea7n ph\u1ea3i ch\u1ee9a ch\u1ea5t l\u1ecfng \u0111\u1ec3 tr\u00e1nh t\u00e1c \u0111\u1ed9ng c\u1ee7a rung \u0111\u1ed9ng b\u00ean trong (s\u1ef1 kh\u00f4ng \u1ed5n \u0111\u1ecbnh c\u1ee7a \u00e1p su\u1ea5t m\u00f4i tr\u01b0\u1eddng \u0111o) v\u00e0 rung \u0111\u1ed9ng b\u00ean ngo\u00e0i (rung \u0111\u1ed9ng sinh ra trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh thi\u1ebft b\u1ecb) \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn vi\u1ec7c quan s\u00e1t ho\u1eb7c g\u00e2y h\u01b0 h\u1ecfng cho b\u00e1nh r\u0103ng. C\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t m\u00e0ng kh\u00f4ng c\u00f3 b\u00e1nh r\u0103ng c\u0169ng c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu va \u0111\u1eadp cao. Nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a n\u00f3 l\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c th\u1ea5p. N\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u00e1y n\u00e9n kh\u00ed ho\u1eb7c l\u00e0m \u0111\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t l\u1ed1p.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"199\" height=\"390\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/11\/05_SJ_Gearless_diaphragm.png\" alt=\"\" class=\"wp-image-2245\" style=\"width:200px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/05_SJ_Gearless_diaphragm.png 199w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/05_SJ_Gearless_diaphragm-153x300.png 153w\" sizes=\"(max-width: 199px) 100vw, 199px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-3-capsule\">2-3. Vi\u00ean nang:<\/h3>\n\n\n\n<p>Hai m\u00e0ng ch\u1eafn \u0111\u01b0\u1ee3c h\u00e0n v\u00e0 b\u1ecbt k\u00edn \u0111\u1ec3 t\u1ea1o th\u00e0nh m\u1ed9t v\u1ecf b\u1ecdc. Khi \u00e1p su\u1ea5t t\u1eeb m\u00f4i tr\u01b0\u1eddng thay \u0111\u1ed5i, v\u1ecf b\u1ecdc s\u1ebd gi\u00e3n n\u1edf (\u00e1p su\u1ea5t d\u01b0\u01a1ng) ho\u1eb7c co l\u1ea1i (\u00e1p su\u1ea5t \u00e2m) t\u00f9y theo \u00e1p su\u1ea5t. \u0110i\u1ec1u n\u00e0y \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn b\u00e1nh r\u0103ng v\u00e0 thanh truy\u1ec1n, t\u1eeb \u0111\u00f3 \u0111i\u1ec1u khi\u1ec3n kim ch\u1ec9. C\u00e1c v\u1eadt li\u1ec7u th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0 \u0111\u1ed3ng v\u00e0 th\u00e9p kh\u00f4ng g\u1ec9. \u0110\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t v\u1ecf b\u1ecdc th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t micro trong ng\u00e0nh c\u00f4ng nghi\u1ec7p kh\u00ed \u0111\u1ed1t, h\u00f3a d\u1ea7u ho\u1eb7c y t\u1ebf.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"404\" height=\"383\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/11\/06_SJ_Capsule.png\" alt=\"\" class=\"wp-image-2246\" style=\"width:300px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/06_SJ_Capsule.png 404w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/06_SJ_Capsule-300x284.png 300w\" sizes=\"(max-width: 404px) 100vw, 404px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-b79186afcb4634a3790297b7fa939e15\" id=\"h-3-others\"><span class=\"ez-toc-section\" id=\"3-others\"><\/span>3. C\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1c<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>C\u00f3 nh\u1eefng lo\u1ea1i \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t kh\u00e1c kh\u00f4ng thu\u1ed9c lo\u1ea1i \u1ed1ng Bourdon ho\u1eb7c m\u00e0ng, nh\u01b0ng ch\u00fang kh\u00f4ng k\u00e9m ph\u1ea7n h\u1eefu \u00edch cho c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p c\u1ea7n \u0111\u1ebfn ch\u00fang. H\u00e3y c\u00f9ng t\u00ecm hi\u1ec3u hai lo\u1ea1i: \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t d\u1ea1ng bellow v\u00e0 \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t d\u1ea1ng piston.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-1-bellows\">3-1. \u1ed0ng bellow:<\/h3>\n\n\n\n<p>B\u1ed9 ph\u1eadn bellow l\u00e0 m\u1ed9t lo\u1ea1i \u1ed1ng r\u1ed7ng c\u00f3 hoa v\u0103n g\u1ee3n s\u00f3ng h\u00ecnh v\u00f2ng tr\u00f2n. Khi \u00e1p su\u1ea5t t\u0103ng, b\u1ed9 ph\u1eadn bellow s\u1ebd k\u00e9o d\u00e0i theo h\u01b0\u1edbng c\u1ee7a \u1ed1ng, \u0111\u1ea9y b\u00e1nh r\u0103ng v\u00e0 thanh truy\u1ec1n \u0111\u1ec3 quay kim ch\u1ec9. Ngo\u00e0i vi\u1ec7c l\u00e0 m\u1ed9t \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t th\u00f4ng th\u01b0\u1eddng, n\u00f3 c\u00f2n th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 m\u1ed9t \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t ch\u00eanh l\u1ec7ch. Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng l\u00e0 k\u1ebft n\u1ed1i b\u1ed9 ph\u1eadn bellow \u1edf c\u1ea3 hai b\u00ean c\u1ee7a m\u00f4i tr\u01b0\u1eddng \u00e1p su\u1ea5t m\u1ed9t c\u00e1ch ri\u00eang bi\u1ec7t. Th\u00f4ng qua s\u1ef1 ch\u00eanh l\u1ec7ch \u00e1p su\u1ea5t gi\u1eefa hai b\u00ean, kim ch\u1ec9 s\u1ebd quay. C\u00e1c \u0111\u1ed3ng h\u1ed3 n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111o ch\u00eanh l\u1ec7ch \u00e1p su\u1ea5t trong kho\u1ea3ng t\u1eeb 0 ~ 25 kgf\/cm\u00b2. \u00c1p su\u1ea5t t\u0129nh t\u1ed1i \u0111a l\u00e0 150 kgf\/cm\u00b2. V\u1eadt li\u1ec7u ph\u1ed5 bi\u1ebfn c\u1ee7a bellow l\u00e0 th\u00e9p kh\u00f4ng g\u1ec9, \u0111\u1ed3ng thau v\u00e0 \u0111\u1ed3ng. B\u1ea1n th\u01b0\u1eddng th\u1ea5y c\u00e1c \u0111\u1ed3ng h\u1ed3 n\u00e0y trong h\u1ec7 th\u1ed1ng \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed, h\u1ec7 th\u1ed1ng l\u1ecdc v\u00e0 h\u1ec7 th\u1ed1ng ph\u00e1t hi\u1ec7n \u1ed1ng x\u1ea3.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"404\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/11\/07_SJ_Bellows.png\" alt=\"\" class=\"wp-image-2247\" style=\"width:300px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/07_SJ_Bellows.png 400w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/07_SJ_Bellows-297x300.png 297w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/07_SJ_Bellows-300x303.png 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/07_SJ_Bellows-100x100.png 100w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-2-piston\">3-2. Piston:<\/h3>\n\n\n\n<p>C\u00e1c \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t piston ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t ch\u00eanh l\u1ec7ch. Hai \u00e1p su\u1ea5t kh\u00e1c nhau \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi hai b\u00ean kh\u00e1c nhau c\u1ee7a \u0111\u1ed3ng h\u1ed3. \u00c1p su\u1ea5t cao h\u01a1n s\u1ebd t\u00e1c \u0111\u1ed9ng l\u00ean \u00e1p su\u1ea5t th\u1ea5p h\u01a1n, khi\u1ebfn piston \u0111\u1ea9y \u00e1p su\u1ea5t c\u00f2n l\u1ea1i sang ph\u00eda \u00e1p su\u1ea5t th\u1ea5p h\u01a1n. \u0110i\u1ec1u n\u00e0y l\u00e0m n\u00e9n l\u00f2 xo v\u00e0 quay kim ch\u1ec9. \u0110\u1ed3ng h\u1ed3 piston ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 gi\u00e1m s\u00e1t b\u01a1m v\u00e0 h\u1ec7 th\u1ed1ng \u1ed1ng d\u1eabn.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"418\" height=\"234\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/11\/08_SJ_Piston.png\" alt=\"\" class=\"wp-image-2248\" style=\"width:500px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/08_SJ_Piston.png 418w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/08_SJ_Piston-300x168.png 300w\" sizes=\"(max-width: 418px) 100vw, 418px\" \/><\/figure>","protected":false},"excerpt":{"rendered":"<p>C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a c\u00e1c lo\u1ea1i \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t c\u01a1 h\u1ecdc kh\u00e1c nhau l\u00e0 g\u00ec? Khi \u0111o \u00e1p su\u1ea5t, c\u00f3 th\u1ec3 l\u1ef1a ch\u1ecdn c\u00e1c lo\u1ea1i \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t kh\u00e1c nhau t\u00f9y thu\u1ed9c v\u00e0o ph\u01b0\u01a1ng ph\u00e1p \u0111o, m\u00f4i tr\u01b0\u1eddng v\u00e0 ngu\u1ed3n \u00e1p su\u1ea5t. SJ Gauge s\u1ebd gi\u00fap b\u1ea1n th\u00f4ng qua b\u00e0i vi\u1ebft n\u00e0y, b\u1ea1n s\u1ebd c\u00f3 c\u00e1i nh\u00ecn s\u00e2u s\u1eafc h\u01a1n v\u1ec1 c\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng b\u00ean trong c\u1ee7a \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t c\u01a1 h\u1ecdc. 1. \u1ed0ng Bourdon H\u00e3y b\u1eaft \u0111\u1ea7u v\u1edbi [\u2026]<\/p>","protected":false},"author":2,"featured_media":2249,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[61],"tags":[71],"class_list":["post-2240","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge","tag-pressure"],"blocksy_meta":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.7 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>What Are the Internal Structures of Different Mechanical Pressure Gauges? - SJ Gauge | Pressure Gauges, Thermometers &amp; Pressure Sensors<\/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:\/\/www.sj-gauge.com\/vi\/mechanical-gauge-internal-structures\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What Are the Internal Structures of Different Mechanical Pressure Gauges?\" \/>\n<meta property=\"og:description\" content=\"What Are the Internal Structures of Different Mechanical Pressure Gauges?When measuring pressure, different pressure gauges can be selected according to different measuring methods, environments and pressure sources. 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