{"id":10369,"date":"2024-12-23T05:36:31","date_gmt":"2024-12-23T05:36:31","guid":{"rendered":"https:\/\/www.hndfcrane.com\/?post_type=posts&#038;p=10369"},"modified":"2024-12-25T02:13:51","modified_gmt":"2024-12-25T02:13:51","slug":"6-harbour-portal-cranes-failure","status":"publish","type":"posts","link":"https:\/\/www.hndfcrane.com\/vi\/posts\/6-harbour-portal-cranes-failure\/","title":{"rendered":"6 S\u1ed5 tay h\u01b0\u1edbng d\u1eabn b\u1ea3o d\u01b0\u1ee1ng v\u00e0 s\u1eeda ch\u1eefa c\u1ea7n tr\u1ee5c c\u1ed5ng c\u1ea3ng"},"content":{"rendered":"<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><p>M\u1ee5c l\u1ee5c<\/p><nav><ul><li><a href=\"#harbour-portal-cranes-failure-1-wire-rope-pulley-failure\">H\u1ecfng h\u00f3c c\u1ee7a c\u1ea7n tr\u1ee5c c\u1ea3ng 1: H\u1ecfng puli c\u00e1p<\/a><\/li><li><a href=\"#harbour-portal-cranes-failure-2-reducer-gear-failure\">S\u1ef1 c\u1ed1 c\u1ea7n c\u1ea9u c\u1ea3ng 2: H\u1ecfng b\u00e1nh r\u0103ng gi\u1ea3m t\u1ed1c<\/a><\/li><li><a href=\"#harbour-portal-cranes-failure-3-coupling-failure\">S\u1ef1 c\u1ed1 c\u1ea7n c\u1ea9u c\u1ed5ng c\u1ea3ng 3: S\u1ef1 c\u1ed1 kh\u1edbp n\u1ed1i<\/a><\/li><li><a href=\"#harbour-portal-cranes-failure-4-brake-failure\">S\u1ef1 c\u1ed1 c\u1ea7n c\u1ea9u c\u1ea3ng 4: H\u1ecfng phanh<\/a><\/li><li><a href=\"#harbour-portal-cranes-failure-5-three-phase-ac-motor-failure\">S\u1ef1 c\u1ed1 5 c\u1ee7a c\u1ea7n c\u1ea9u c\u1ea3ng: \u0110\u1ed9ng c\u01a1 AC ba pha b\u1ecb h\u1ecfng<\/a><\/li><li><a href=\"#harbour-portal-cranes-failure-6-abnormal-noise-at-the-hinge-point-of-the-boom\">S\u1ef1 c\u1ed1 c\u1ea7n c\u1ea9u c\u1ea3ng 6: Ti\u1ebfng \u1ed3n b\u1ea5t th\u01b0\u1eddng t\u1ea1i \u0111i\u1ec3m b\u1ea3n l\u1ec1 c\u1ee7a c\u1ea7n tr\u1ee5c<\/a><\/li><li><a href=\"#in-summary\">T\u00f3m l\u1ea1i<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"843\" height=\"529\" src=\"https:\/\/www.hndfcrane.com\/wp-content\/uploads\/2024\/12\/Single-Boom-Portal-crane.jpg\" alt=\"S\u1ef1 c\u1ed1 c\u1ea7n c\u1ea9u c\u1ea3ng\" class=\"wp-image-10258\"\/><\/figure>\n\n\n\n<p>V\u1edbi vi\u1ec7c li\u00ean t\u1ee5c m\u1edf r\u1ed9ng quy m\u00f4 x\u00e2y d\u1ef1ng c\u1ea3ng, b\u1ebfn t\u00e0u, v.v., ph\u1ea1m vi \u1ee9ng d\u1ee5ng c\u1ee7a c\u1ea7n tr\u1ee5c c\u1ed5ng c\u1ea3ng trong ho\u1ea1t \u0111\u1ed9ng c\u1ea3ng c\u0169ng ng\u00e0y c\u00e0ng t\u0103ng.<\/p>\n\n\n\n<p>\u0110\u1ec3 ph\u00e1t huy h\u1ebft ch\u1ee9c n\u0103ng c\u1ee7a thi\u1ebft b\u1ecb v\u00e0 duy tr\u00ec s\u1ef1 an to\u00e0n v\u00e0 \u0111\u1ed9 tin c\u1eady c\u1ee7a ho\u1ea1t \u0111\u1ed9ng, c\u1ea7n t\u0103ng c\u01b0\u1eddng b\u1ea3o tr\u00ec v\u00e0 qu\u1ea3n l\u00fd c\u1ea7n tr\u1ee5c c\u1ed5ng c\u1ea3ng. Trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh h\u00e0ng ng\u00e0y c\u1ee7a c\u1ea7n tr\u1ee5c c\u1ed5ng c\u1ea3ng, puli c\u00e1p, b\u00e1nh r\u0103ng gi\u1ea3m t\u1ed1c, kh\u1edbp n\u1ed1i, phanh, \u0111\u1ed9ng c\u01a1 AC ba pha, t\u1ee7 \u0111i\u1ec7n cao th\u1ebf, m\u00e1y bi\u1ebfn \u00e1p, v.v. th\u01b0\u1eddng b\u1ecb h\u1ecfng. C\u1ea7n th\u1ef1c hi\u1ec7n c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o tr\u00ec hi\u1ec7u qu\u1ea3 \u0111\u1ec3 gi\u1ea3m thi\u1ec3u kh\u1ea3 n\u0103ng x\u1ea3y ra s\u1ef1 c\u1ed1 li\u00ean quan \u0111\u1ebfn c\u1ea7n tr\u1ee5c c\u1ed5ng c\u1ea3ng v\u00e0 duy tr\u00ec c\u1ea7n tr\u1ee5c c\u1ed5ng c\u1ea3ng trong t\u00ecnh tr\u1ea1ng ho\u1ea1t \u0111\u1ed9ng t\u1ed1t. Tr\u00ean c\u01a1 s\u1edf \u0111\u00f3, n\u00e2ng cao hi\u1ec7u qu\u1ea3 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u1ea3ng v\u00e0 \u0111\u1ea3m b\u1ea3o an to\u00e0n s\u1ea3n xu\u1ea5t.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"harbour-portal-cranes-failure-1-wire-rope-pulley-failure\">H\u1ecfng h\u00f3c c\u1ee7a c\u1ea7n tr\u1ee5c c\u1ea3ng 1: H\u1ecfng puli c\u00e1p<\/h2>\n\n\n\n<p>TRONG <a href=\"https:\/\/www.hndfcrane.com\/vi\/harbour-portal-cranes\/\">c\u1ea7n c\u1ea9u c\u1ed5ng c\u1ea3ng<\/a> h\u1ecfng h\u00f3c, puli c\u00e1p th\u00e9p l\u00e0 th\u00e0nh ph\u1ea7n l\u1ef1c ch\u00ednh, v\u00e0 h\u01b0 h\u1ecfng \u1ed5 tr\u1ee5c, n\u1ee9t v\u00e0nh ho\u1eb7c m\u1ecfng th\u01b0\u1eddng x\u1ea3y ra trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh thi\u1ebft b\u1ecb. Nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 c\u1ee7a c\u00e1c v\u1ea5n \u0111\u1ec1 tr\u00ean l\u00e0 c\u00e1p th\u00e9p v\u00e0 puli \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i, v\u00e0 hai b\u00ean c\u00f9ng nhau t\u1ea1o ra l\u1ef1c \u0111\u00f9n, sau \u0111\u00f3 puli s\u1ebd b\u1ecb ma s\u00e1t \u1ea3nh h\u01b0\u1edfng v\u00e0 d\u1ea7n m\u1ecfng \u0111i. Khi \u0111\u1ed9 m\u1ecfng \u0111\u1ea1t \u0111\u1ebfn m\u1ed9t m\u1ee9c \u0111\u1ed9 nh\u1ea5t \u0111\u1ecbnh, \u00e1p su\u1ea5t do c\u00e1p th\u00e9p g\u00e2y ra v\u01b0\u1ee3t qu\u00e1 \u00e1p su\u1ea5t m\u00e0 n\u00f3 c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c v\u00e0 x\u1ea3y ra v\u1ea5n \u0111\u1ec1 n\u1ee9t.<\/p>\n\n\n\n<p><strong>S\u1ed5 tay b\u1ea3o tr\u00ec 1<\/strong><\/p>\n\n\n\n<p>B\u1ea3o d\u01b0\u1ee1ng kh\u1ed1i puli c\u00e1p th\u00e9p \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o kh\u1ed1i puli ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh v\u00e0 an to\u00e0n, tr\u01b0\u1edbc h\u1ebft, nghi\u00eam c\u1ea5m qu\u00e1 t\u1ea3i c\u1ea7n tr\u1ee5c trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng, \u0111\u1ec3 kh\u00f4ng l\u00e0m t\u0103ng kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ef1c c\u1ee7a kh\u1ed1i puli, g\u00e2y h\u01b0 h\u1ecfng \u1ed5 tr\u1ee5c. <\/p>\n\n\n\n<p>Th\u1ee9 hai, c\u00e1p th\u00e9p c\u1ea7n \u0111\u01b0\u1ee3c b\u00f4i tr\u01a1n v\u00e0 b\u1ea3o d\u01b0\u1ee1ng th\u01b0\u1eddng xuy\u00ean \u0111\u1ec3 gi\u1ea3m ma s\u00e1t gi\u1eefa puli v\u00e0 c\u00e1p th\u00e9p, tr\u00e1nh t\u00ecnh tr\u1ea1ng v\u00e0nh puli v\u00e0 r\u00e3nh b\u00e1nh xe b\u1ecb m\u00e0i m\u00f2n nghi\u00eam tr\u1ecdng. <\/p>\n\n\n\n<p>Cu\u1ed1i c\u00f9ng, n\u1ebfu r\u00e3nh b\u00e1nh xe b\u1ecb hao m\u00f2n nghi\u00eam tr\u1ecdng, ch\u1eb3ng h\u1ea1n nh\u01b0 t\u1ed1c \u0111\u1ed9 hao m\u00f2n kh\u00f4ng \u0111\u1ec1u kh\u00f4ng d\u01b0\u1edbi 3 mm, puli b\u1ecb n\u1ee9t v\u00e0 gi\u00e1 tr\u1ecb hao m\u00f2n \u0111\u1ed9 d\u00e0y th\u00e0nh chi\u1ebfm 1\/5 \u0111\u1ed9 d\u00e0y th\u00e0nh ban \u0111\u1ea7u, v.v., puli c\u1ea7n \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf v\u00e0 thay th\u1ebf b\u1eb1ng puli m\u1edbi.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"harbour-portal-cranes-failure-2-reducer-gear-failure\">S\u1ef1 c\u1ed1 c\u1ea7n c\u1ea9u c\u1ea3ng 2: H\u1ecfng b\u00e1nh r\u0103ng gi\u1ea3m t\u1ed1c<\/h2>\n\n\n\n<p>Trong c\u1ea7n tr\u1ee5c c\u1ed5ng c\u1ea3ng, b\u1ed9 gi\u1ea3m t\u1ed1c l\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n truy\u1ec1n \u0111\u1ed9ng c\u01a1 b\u1ea3n truy\u1ec1n m\u00f4-men xo\u1eafn trong qu\u00e1 tr\u00ecnh \u0103n kh\u1edbp b\u00e1nh r\u0103ng v\u00e0 sau \u0111\u00f3 \u0111i\u1ec1u ch\u1ec9nh t\u1ed1c \u0111\u1ed9 \u0111\u1ed9ng c\u01a1 cho \u0111\u1ebfn khi \u0111\u1ea1t \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u v\u1eadn h\u00e0nh. C\u00e1c h\u1ecfng h\u00f3c b\u00e1nh r\u0103ng, ch\u1eb3ng h\u1ea1n nh\u01b0 b\u1ec1 m\u1eb7t r\u0103ng b\u1ecb d\u00ednh, r\u0103ng b\u1ecb ng\u1eaft k\u1ebft n\u1ed1i v\u00e0 b\u1ec1 m\u1eb7t r\u0103ng b\u1ecb m\u00f2n nghi\u00eam tr\u1ecdng, th\u01b0\u1eddng x\u1ea3y ra trong qu\u00e1 tr\u00ecnh n\u00e0y.<\/p>\n\n\n\n<p><strong>S\u1ed5 tay b\u1ea3o tr\u00ec 2<\/strong><\/p>\n\n\n\n<p>Trong qu\u00e1 tr\u00ecnh b\u1ea3o d\u01b0\u1ee1ng h\u1ed9p gi\u1ea3m t\u1ed1c, y\u00eau c\u1ea7u c\u1ea7n c\u1ea9u kh\u00f4ng \u0111\u01b0\u1ee3c qu\u00e1 t\u1ea3i trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng v\u00e0 ph\u1ea3i \u00eam \u00e1i v\u00e0 ch\u1eadm r\u00e3i trong qu\u00e1 tr\u00ecnh phanh ho\u1eb7c kh\u1edfi \u0111\u1ed9ng. Kh\u00f4ng th\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c tr\u1ef1c ti\u1ebfp m\u00e0 kh\u00f4ng d\u1eebng ho\u1ea1t \u0111\u1ed9ng n\u1ebfu kh\u00f4ng ph\u1ea3i tr\u01b0\u1eddng h\u1ee3p kh\u1ea9n c\u1ea5p. Ho\u1ea1t \u0111\u1ed9ng. Trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng, h\u1ed9p gi\u1ea3m t\u1ed1c ph\u1ea3i \u0111\u01b0\u1ee3c b\u1ed5 sung d\u1ea7u b\u00f4i tr\u01a1n th\u01b0\u1eddng xuy\u00ean \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u v\u1ec1 \u0111i\u1ec1u ki\u1ec7n ho\u1ea1t \u0111\u1ed9ng c\u1ee7a h\u1ed9p gi\u1ea3m t\u1ed1c v\u00e0 ph\u1ea3i v\u1ec7 sinh v\u1ecf h\u1ed9p k\u1ecbp th\u1eddi. <\/p>\n\n\n\n<p>Ngo\u00e0i ra, c\u1ea7n th\u01b0\u1eddng xuy\u00ean ki\u1ec3m tra, ph\u00e2n t\u00edch ch\u1ea5t l\u01b0\u1ee3ng d\u1ea7u b\u00f4i tr\u01a1n, k\u1ebft h\u1ee3p k\u1ebft qu\u1ea3 ki\u1ec3m tra \u0111\u1ec3 l\u00e0m r\u00f5 t\u00ecnh tr\u1ea1ng hao m\u00f2n c\u1ee7a h\u1ed9p gi\u1ea3m t\u1ed1c, th\u1ef1c hi\u1ec7n c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o d\u01b0\u1ee1ng c\u00f3 m\u1ee5c ti\u00eau, tr\u00e1nh t\u00ecnh tr\u1ea1ng hao m\u00f2n gia t\u0103ng, cu\u1ed1i c\u00f9ng g\u00e2y ra tai n\u1ea1n thi\u1ebft b\u1ecb.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"harbour-portal-cranes-failure-3-coupling-failure\">S\u1ef1 c\u1ed1 c\u1ea7n c\u1ea9u c\u1ed5ng c\u1ea3ng 3: S\u1ef1 c\u1ed1 kh\u1edbp n\u1ed1i<\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"299\" height=\"282\" src=\"https:\/\/www.hndfcrane.com\/wp-content\/uploads\/2024\/12\/Coupling-failure.png\" alt=\"L\u1ed7i gh\u00e9p n\u1ed1i\" class=\"wp-image-10305\"\/><\/figure><\/div>\n\n\n<p>R\u0103ng \u0103n kh\u1edbp c\u1ee7a kh\u1edbp n\u1ed1i r\u0103ng c\u1ea7n tr\u1ee5c c\u1ed5ng c\u1ea3ng d\u1ec5 b\u1ecb m\u00f2n v\u00e0 r\u00e1ch, th\u1eadm ch\u00ed c\u00f3 th\u1ec3 x\u1ea3y ra c\u00e1c v\u1ea5n \u0111\u1ec1 nh\u01b0 r\u0103ng g\u00e3y v\u00e0 r\u0103ng c\u1eafn. N\u1ebfu s\u1eed d\u1ee5ng kh\u1edbp n\u1ed1i \u0111\u00e0n h\u1ed3i hoa m\u1eadn c\u1ea7n tr\u1ee5c c\u1ed5ng c\u1ea3ng, th\u00ec \u0111\u00e0n h\u1ed3i hoa m\u1eadn d\u1ec5 b\u1ecb m\u00f2n, l\u00e3o h\u00f3a nhanh ho\u1eb7c n\u1ee9t do m\u1ecfi trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh c\u1ea7n tr\u1ee5c l\u00e2u d\u00e0i. Trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng c\u1ea7n tr\u1ee5c c\u1ed5ng c\u1ea3ng l\u00e2u d\u00e0i, v\u00f2ng \u0111\u00e0n h\u1ed3i c\u1ee7a kh\u1edbp n\u1ed1i ch\u1ed1t \u0111\u00e0n h\u1ed3i c\u0169ng s\u1ebd b\u1ecb m\u00f2n nghi\u00eam tr\u1ecdng v\u00e0 ch\u1ed1t d\u1ec5 b\u1ecb m\u1ea5t khi\u1ebfn ti\u1ebfng \u1ed3n truy\u1ec1n \u0111\u1ed9ng v\u00e0 \u0111\u1ed9 rung ph\u00e1t ra t\u1eeb kh\u1edbp n\u1ed1i trong qu\u00e1 tr\u00ecnh truy\u1ec1n \u0111\u1ed9ng s\u1ebd t\u0103ng l\u00ean, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng c\u1ee7a thi\u1ebft b\u1ecb. Ngo\u00e0i ra, c\u00e1c bu l\u00f4ng \u0111\u1ed1i \u1ee9ng c\u1ee7a kh\u1edbp n\u1ed1i c\u0169ng s\u1ebd b\u1ecb g\u00e3y v\u00e0 g\u00e2y ra h\u1ecfng h\u00f3c c\u01a1 h\u1ecdc.<\/p>\n\n\n\n<p><strong>S\u1ed5 tay b\u1ea3o tr\u00ec 3<\/strong><\/p>\n\n\n\n<p>Trong qu\u00e1 tr\u00ecnh ho\u1ea1t \u0111\u1ed9ng l\u00e2u d\u00e0i c\u1ee7a kh\u1edbp n\u1ed1i b\u00e1nh r\u0103ng c\u1ea7n tr\u1ee5c c\u1ea3ng, r\u0103ng trong v\u00e0 r\u0103ng ngo\u00e0i s\u1ebd b\u1ecb hao m\u00f2n nh\u1ea5t \u0111\u1ecbnh, v\u00ec v\u1eady c\u1ea7n ph\u1ea3i b\u00f4i tr\u01a1n v\u00e0 b\u1ea3o d\u01b0\u1ee1ng th\u01b0\u1eddng xuy\u00ean. \u0110\u1ed3ng th\u1eddi, kh\u1edbp n\u1ed1i \u0111\u00e0n h\u1ed3i n\u00ean \u0111\u01b0\u1ee3c ki\u1ec3m tra th\u01b0\u1eddng xuy\u00ean, \u0111\u1eb7c bi\u1ec7t l\u00e0 vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u00e0n h\u1ed3i v\u00e0 ch\u1ed1t. Khi ph\u00e1t hi\u1ec7n c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u00e0n h\u1ed3i b\u1ecb h\u1ecfng, c\u1ea7n ph\u1ea3i thay th\u1ebf k\u1ecbp th\u1eddi. <\/p>\n\n\n\n<p>Trong qu\u00e1 tr\u00ecnh ki\u1ec3m tra th\u01b0\u1eddng xuy\u00ean, c\u0169ng c\u1ea7n ch\u00fa \u00fd si\u1ebft ch\u1eb7t bu l\u00f4ng th\u01b0\u1eddng xuy\u00ean \u0111\u1ec3 tr\u00e1nh bu l\u00f4ng l\u1ecfng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng c\u1ee7a thi\u1ebft b\u1ecb.<\/p>\n\n\n\n<p>Trong qu\u00e1 tr\u00ecnh l\u1eafp \u0111\u1eb7t kh\u1edbp n\u1ed1i, ph\u1ea3i hi\u1ec7u ch\u1ec9nh \u0111\u1ed9 th\u1eb3ng h\u00e0ng \u0111\u1ec3 tr\u00e1nh l\u00e0m gi\u1ea3m tu\u1ed5i th\u1ecd c\u1ee7a thi\u1ebft b\u1ecb do ph\u01b0\u01a1ng ph\u00e1p k\u1ebft h\u1ee3p kh\u00f4ng ph\u00f9 h\u1ee3p. <\/p>\n\n\n\n<p>\u0110\u1ed3ng th\u1eddi, n\u00ean th\u01b0\u1eddng xuy\u00ean tra m\u1ee1 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o khe h\u1edf gi\u1eefa r\u0103ng trong v\u00e0 r\u0103ng ngo\u00e0i c\u00f3 hi\u1ec7u su\u1ea5t b\u00f4i tr\u01a1n t\u1ed1t, gi\u1ea3m m\u00e0i m\u00f2n, ch\u00fa \u00fd \u0111\u1ebfn vi\u1ec7c v\u1eadn h\u00e0nh c\u1ea7n c\u1ea9u \u00eam \u00e1i v\u00e0 ch\u1eadm r\u00e3i. <\/p>\n\n\n\n<p>Trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh c\u1ea7n tr\u1ee5c c\u1ed5ng c\u1ea3ng, c\u1ea7n t\u0103ng c\u01b0\u1eddng ki\u1ec3m tra th\u01b0\u1eddng xuy\u00ean. Trong tr\u01b0\u1eddng h\u1ee3p c\u00f3 \u0111i\u1ec1u ki\u1ec7n b\u1ea5t th\u01b0\u1eddng nh\u01b0 rung \u0111\u1ed9ng ho\u1eb7c ti\u1ebfng \u1ed3n b\u1ea5t th\u01b0\u1eddng qu\u00e1 m\u1ee9c, c\u1ea7n d\u1eebng l\u1ea1i \u0111\u1ec3 ki\u1ec3m tra v\u00e0 b\u1ea3o d\u01b0\u1ee1ng k\u1ecbp th\u1eddi.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"harbour-portal-cranes-failure-4-brake-failure\">S\u1ef1 c\u1ed1 c\u1ea7n c\u1ea9u c\u1ea3ng 4: H\u1ecfng phanh<\/h2>\n\n\n\n<p>Trong s\u1ea3n xu\u1ea5t th\u1ef1c t\u1ebf, phanh c\u1ee7a c\u1ea7n tr\u1ee5c c\u1ed5ng c\u1ea3ng th\u01b0\u1eddng b\u1ecb h\u1ecfng, bao g\u1ed3m:<\/p>\n\n\n\n<ul>\n<li>M\u00e1 phanh b\u1ecb m\u00f2n b\u1ea5t th\u01b0\u1eddng, l\u00e0m gi\u1ea3m tu\u1ed5i th\u1ecd c\u1ee7a m\u00e1 phanh v\u00e0 ph\u1ea3i thay th\u1ebf th\u01b0\u1eddng xuy\u00ean;<\/li>\n\n\n\n<li>Kho\u1ea3ng h\u1edf phanh v\u01b0\u1ee3t qu\u00e1 m\u1ed9t ti\u00eau chu\u1ea9n nh\u1ea5t \u0111\u1ecbnh, do \u0111\u00f3 l\u00e0m gi\u1ea3m hi\u1ec7u qu\u1ea3 phanh v\u00e0 th\u1eadm ch\u00ed l\u00e0 kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng phanh;<\/li>\n\n\n\n<li>Trong qu\u00e1 tr\u00ecnh phanh, nhi\u1ec7t \u0111\u1ed9 c\u1ee7a b\u00e1nh phanh d\u1ec5 v\u01b0\u1ee3t qu\u00e1 m\u1ed9t ti\u00eau chu\u1ea9n nh\u1ea5t \u0111\u1ecbnh, sau \u0111\u00f3 v\u00f2ng cao su \u0111\u00e0n h\u1ed3i c\u1ee7a ch\u1ed1t k\u1ebft n\u1ed1i s\u1ebd b\u1ecb h\u00f2a tan v\u00e0 l\u00e3o h\u00f3a d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a c\u00e1c y\u1ebfu t\u1ed1 nhi\u1ec7t \u0111\u1ed9 cao;<\/li>\n\n\n\n<li>C\u00e1c kh\u1edbp n\u1ed1i c\u1ee7a tay phanh b\u1ecb k\u1eb9t, phanh kh\u00f4ng th\u1ec3 k\u00e9o c\u0103ng m\u1ed9t c\u00e1ch tr\u01a1n tru. Lo\u1ea1i hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y s\u1ebd khi\u1ebfn cho vi\u1ec7c n\u00e2ng, x\u1ebfp d\u1ee1 s\u1ea3n xu\u1ea5t ph\u1ea3i \u0111\u1ed1i m\u1eb7t v\u1edbi r\u1ee7i ro an to\u00e0n r\u1ea5t l\u1edbn. <\/li>\n\n\n\n<li>M\u00e1 phanh b\u1ecb m\u00f2n b\u1ea5t th\u01b0\u1eddng, l\u00e0m gi\u1ea3m tu\u1ed5i th\u1ecd c\u1ee7a m\u00e1 phanh v\u00e0 ph\u1ea3i thay th\u1ebf th\u01b0\u1eddng xuy\u00ean;<\/li>\n\n\n\n<li>Kho\u1ea3ng h\u1edf phanh v\u01b0\u1ee3t qu\u00e1 m\u1ed9t ti\u00eau chu\u1ea9n nh\u1ea5t \u0111\u1ecbnh, do \u0111\u00f3 l\u00e0m gi\u1ea3m hi\u1ec7u qu\u1ea3 phanh v\u00e0 th\u1eadm ch\u00ed l\u00e0 kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng phanh;<\/li>\n\n\n\n<li>Trong qu\u00e1 tr\u00ecnh phanh, nhi\u1ec7t \u0111\u1ed9 c\u1ee7a b\u00e1nh phanh d\u1ec5 v\u01b0\u1ee3t qu\u00e1 m\u1ed9t ti\u00eau chu\u1ea9n nh\u1ea5t \u0111\u1ecbnh, sau \u0111\u00f3 v\u00f2ng cao su \u0111\u00e0n h\u1ed3i c\u1ee7a ch\u1ed1t k\u1ebft n\u1ed1i s\u1ebd b\u1ecb h\u00f2a tan v\u00e0 l\u00e3o h\u00f3a d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a c\u00e1c y\u1ebfu t\u1ed1 nhi\u1ec7t \u0111\u1ed9 cao;<\/li>\n\n\n\n<li>C\u00e1c kh\u1edbp n\u1ed1i c\u1ee7a tay phanh b\u1ecb k\u1eb9t, phanh kh\u00f4ng th\u1ec3 k\u00e9o c\u0103ng m\u1ed9t c\u00e1ch tr\u01a1n tru. Lo\u1ea1i hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y s\u1ebd khi\u1ebfn cho vi\u1ec7c n\u00e2ng, x\u1ebfp d\u1ee1 s\u1ea3n xu\u1ea5t ph\u1ea3i \u0111\u1ed1i m\u1eb7t v\u1edbi r\u1ee7i ro an to\u00e0n r\u1ea5t l\u1edbn.<\/li>\n<\/ul>\n\n\n\n<p><strong>S\u1ed5 tay b\u1ea3o tr\u00ec 4<\/strong><\/p>\n\n\n\n<p>\u0110\u1ec3 ph\u00f2ng ng\u1eeba hi\u1ec7u qu\u1ea3 t\u00ecnh tr\u1ea1ng h\u1ecfng phanh, c\u1ea7n ki\u1ec3m tra th\u01b0\u1eddng xuy\u00ean c\u00e1c thi\u1ebft b\u1ecb li\u00ean quan v\u00e0 ch\u00fa \u00fd \u0111\u1ed3ng th\u1eddi 4 v\u1ea5n \u0111\u1ec1 sau:<\/p>\n\n\n\n<ul>\n<li>Tr\u1ecdng t\u00e2m l\u00e0 ki\u1ec3m tra xem ph\u1ea7n b\u1ea3n l\u1ec1 c\u1ee7a tr\u1ee5c ch\u1ed1t c\u00f3 b\u1ecb m\u00f2n ho\u1eb7c k\u1eb9t nghi\u00eam tr\u1ecdng kh\u00f4ng v\u00e0 v\u1ecb tr\u00ed k\u1ebft n\u1ed1i c\u00f3 li\u00ean quan c\u00f3 b\u1ecb l\u1ecfng kh\u00f4ng;<\/li>\n\n\n\n<li>Ki\u1ec3m tra to\u00e0n di\u1ec7n v\u00e0 x\u00e1c minh m\u1ed9t c\u00e1ch khoa h\u1ecdc xem khe h\u1edf gi\u1eefa m\u00e1 phanh v\u00e0 b\u00e1nh xe phanh c\u00f3 \u0111\u1ea1t ti\u00eau chu\u1ea9n kh\u00f4ng;<\/li>\n\n\n\n<li>Ki\u1ec3m tra xem h\u1ec7 th\u1ed1ng th\u1ee7y l\u1ef1c c\u00f3 ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng kh\u00f4ng;<\/li>\n\n\n\n<li>C\u1ea7n ki\u1ec3m tra xem m\u00e1 phanh v\u00e0 b\u00e1nh xe phanh c\u00f3 b\u1ecb m\u00f2n kh\u00f4ng v\u00e0 b\u1ec1 m\u1eb7t phanh ph\u1ea3i s\u1ea1ch b\u1ee5i b\u1ea9n.<\/li>\n<\/ul>\n\n\n\n<p>Th\u00f4ng qua ki\u1ec3m tra tr\u00ean, c\u00f3 th\u1ec3 n\u1eafm b\u1eaft \u0111\u01b0\u1ee3c tr\u1ea1ng th\u00e1i ho\u1ea1t \u0111\u1ed9ng c\u1ee7a phanh, ngo\u00e0i ra, c\u1ea7n t\u0103ng c\u01b0\u1eddng b\u00f4i tr\u01a1n v\u00e0 b\u1ea3o d\u01b0\u1ee1ng t\u1eebng v\u1ecb tr\u00ed kh\u1edbp n\u1ed1i c\u1ee7a phanh, c\u0103n c\u1ee9 v\u00e0o t\u00ecnh h\u00ecnh th\u1ef1c t\u1ebf \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh h\u00e0nh tr\u00ecnh phanh cho ph\u00f9 h\u1ee3p, \u0111\u1ea3m b\u1ea3o phanh c\u00f3 hi\u1ec7u qu\u1ea3 v\u00e0 an to\u00e0n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"harbour-portal-cranes-failure-5-three-phase-ac-motor-failure\">S\u1ef1 c\u1ed1 5 c\u1ee7a c\u1ea7n c\u1ea9u c\u1ea3ng: \u0110\u1ed9ng c\u01a1 AC ba pha b\u1ecb h\u1ecfng<\/h2>\n\n\n\n<p>Trong c\u1ea7n tr\u1ee5c c\u1ea3ng, \u0111\u1ed9ng c\u01a1 AC ba pha \u0111\u00f3ng vai tr\u00f2 chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng, c\u00f3 th\u1ec3 chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n th\u00e0nh n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc, nh\u01b0ng ch\u00fang th\u01b0\u1eddng b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi nhi\u1ec1u y\u1ebfu t\u1ed1 trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh thi\u1ebft b\u1ecb v\u00e0 b\u1ecb h\u1ecfng.<\/p>\n\n\n\n<p>Khi \u0111i\u1ec7n \u00e1p ngu\u1ed3n qu\u00e1 cao, d\u00f2ng \u0111i\u1ec7n k\u00edch th\u00edch s\u1ebd t\u0103ng l\u00ean, khi\u1ebfn \u0111\u1ed9ng c\u01a1 n\u00f3ng l\u00ean qu\u00e1 m\u1ee9c. Khi nhi\u1ec7t \u0111\u1ed9 gia nhi\u1ec7t v\u01b0\u1ee3t qu\u00e1 m\u1ed9t ti\u00eau chu\u1ea9n nh\u1ea5t \u0111\u1ecbnh, l\u1edbp c\u00e1ch \u0111i\u1ec7n c\u1ee7a \u0111\u1ed9ng c\u01a1 s\u1ebd b\u1ecb h\u1ecfng v\u00e0 nguy c\u01a1 h\u1ecfng h\u00f3c s\u1ebd t\u0103ng l\u00ean. <\/p>\n\n\n\n<p>N\u1ebfu \u0111i\u1ec7n \u00e1p cung c\u1ea5p qu\u00e1 th\u1ea5p, m\u00f4-men xo\u1eafn \u0111i\u1ec7n t\u1eeb s\u1ebd gi\u1ea3m \u0111\u00e1ng k\u1ec3. <\/p>\n\n\n\n<p>N\u1ebfu m\u00f4-men xo\u1eafn t\u1ea3i kh\u00f4ng \u0111\u01b0\u1ee3c gi\u1ea3m \u0111\u1ed3ng b\u1ed9 t\u1ea1i th\u1eddi \u0111i\u1ec3m n\u00e0y, t\u1ed1c \u0111\u1ed9 r\u00f4-to t\u1ed5ng th\u1ec3 s\u1ebd qu\u00e1 th\u1ea5p v\u00e0 \u0111\u1ed9 l\u1ec7ch qu\u00e1 m\u1ee9c s\u1ebd g\u00e2y ra v\u1ea5n \u0111\u1ec1 qu\u00e1 t\u1ea3i \u0111\u1ed9ng c\u01a1, l\u00e0m t\u0103ng th\u00eam nhi\u1ec7t l\u01b0\u1ee3ng t\u1ecfa ra. <\/p>\n\n\n\n<p>N\u1ebfu kh\u00f4ng gi\u1ea3i quy\u1ebft k\u1ecbp th\u1eddi v\u1ea5n \u0111\u1ec1 n\u00e0y trong th\u1eddi gian d\u00e0i, n\u00f3 s\u1ebd b\u1ecb c\u00e1c y\u1ebfu t\u1ed1 \u0111\u1ed9 \u1ea9m b\u00ean ngo\u00e0i t\u00e1c \u0111\u1ed9ng, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng c\u1ee7a \u0111\u1ed9ng c\u01a1 AC ba pha, \u0111\u1ed3ng th\u1eddi \u0111\u1ea9y nhanh qu\u00e1 tr\u00ecnh l\u00e3o h\u00f3a l\u1edbp c\u00e1ch \u0111i\u1ec7n v\u00e0 l\u00e0m gi\u1ea3m tu\u1ed5i th\u1ecd c\u1ee7a \u0111\u1ed9ng c\u01a1 AC ba pha.<\/p>\n\n\n\n<p><strong>S\u1ed5 tay b\u1ea3o tr\u00ec 5<\/strong><\/p>\n\n\n\n<p>Trong qu\u00e1 tr\u00ecnh b\u1ea3o d\u01b0\u1ee1ng h\u00e0ng ng\u00e0y c\u1ee7a c\u1ea7n tr\u1ee5c c\u1ed5ng c\u1ea3ng v\u00e0 b\u1ea3o d\u01b0\u1ee1ng \u0111\u1ed9ng c\u01a1 AC ba pha, ngu\u1ed3n \u0111i\u1ec7n ph\u1ea3i \u0111\u01b0\u1ee3c c\u1eaft tr\u01b0\u1edbc \u0111\u1ec3 duy tr\u00ec s\u1ef1 an to\u00e0n c\u1ee7a thi\u1ebft b\u1ecb v\u00e0 ng\u01b0\u1eddi v\u1eadn h\u00e0nh. Sau khi \u0111\u1ed9ng c\u01a1 ho\u1ea1t \u0111\u1ed9ng xong, c\u1ea7n ti\u1ebfn h\u00e0nh b\u1ea3o d\u01b0\u1ee1ng. C\u1ea7n l\u01b0u \u00fd r\u1eb1ng m\u1ed9t s\u1ed1 b\u1ed9 ph\u1eadn c\u00f3 th\u1ec3 c\u00f3 \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 cao. C\u1ea7n ph\u1ea3i l\u00e0m m\u00e1t h\u1ee3p l\u00fd tr\u01b0\u1edbc khi th\u1ef1c hi\u1ec7n c\u00e1c ho\u1ea1t \u0111\u1ed9ng b\u1ea3o d\u01b0\u1ee1ng \u0111\u1ec3 duy tr\u00ec s\u1ef1 an to\u00e0n c\u1ee7a nh\u00e2n vi\u00ean. N\u1ebfu c\u1ea7n tr\u1ee5c c\u1ed5ng \u1edf tr\u1ea1ng th\u00e1i t\u1eaft m\u00e1y trong th\u1eddi gian d\u00e0i, \u0111\u1ec3 tr\u00e1nh h\u1ecfng \u0111\u1ed9ng c\u01a1, th\u01b0\u1eddng ph\u1ea3i v\u1eadn h\u00e0nh \u00edt nh\u1ea5t m\u1ed9t l\u1ea7n m\u1ed9t th\u00e1ng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o b\u1ed9 ph\u1eadn l\u00e0m n\u00f3ng \u0111\u1ed9ng c\u01a1 v\u1eabn ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng v\u00e0 ki\u1ec3m tra \u0111\u1ed9ng c\u01a1 xem c\u00f3 b\u1ecb h\u01b0 h\u1ecfng \u1edf c\u00e1c b\u1ed9 ph\u1eadn kh\u00f4ng k\u1ecbp th\u1eddi \u0111\u1ec3 tr\u00e1nh h\u01b0 h\u1ecfng khi b\u1eaft \u0111\u1ea7u s\u1eed d\u1ee5ng \u0111\u1ed9ng c\u01a1 sau n\u00e0y. <\/p>\n\n\n\n<p>Trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng \u0111\u1ed9ng c\u01a1, c\u1ea7n quan s\u00e1t \u0111\u1ed9ng l\u1ef1c h\u1ecdc v\u1ec1 m\u00f9i, \u00e2m thanh, bi\u00ean \u0111\u1ed9 v\u00e0 t\u1ea7n s\u1ed1 rung \u0111\u1ed9ng trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh \u0111\u1ed9ng c\u01a1. Khi ph\u00e1t hi\u1ec7n m\u00f9i ch\u00e1y, c\u1ea7n d\u1eebng c\u00f4ng vi\u1ec7c k\u1ecbp th\u1eddi v\u00e0 ki\u1ec3m tra nghi\u00eam ng\u1eb7t c\u00e1c b\u1ed9 ph\u1eadn cu\u1ed9n d\u00e2y v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn kh\u00e1c \u0111\u1ec3 tr\u00e1nh c\u00e1c b\u1ed9 ph\u1eadn quan tr\u1ecdng b\u1ecb ch\u00e1y.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"harbour-portal-cranes-failure-6-abnormal-noise-at-the-hinge-point-of-the-boom\">S\u1ef1 c\u1ed1 c\u1ea7n c\u1ea9u c\u1ea3ng 6: Ti\u1ebfng \u1ed3n b\u1ea5t th\u01b0\u1eddng t\u1ea1i \u0111i\u1ec3m b\u1ea3n l\u1ec1 c\u1ee7a c\u1ea7n tr\u1ee5c<\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"582\" height=\"306\" src=\"https:\/\/www.hndfcrane.com\/wp-content\/uploads\/2024\/12\/Abnormal-noise-at-the-hinge-point-of-the-boom.jpg\" alt=\"Ti\u1ebfng \u1ed3n b\u1ea5t th\u01b0\u1eddng t\u1ea1i \u0111i\u1ec3m b\u1ea3n l\u1ec1 c\u1ee7a c\u1ea7n tr\u1ee5c\" class=\"wp-image-10312\"\/><\/figure><\/div>\n\n\n<p>Trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh th\u01b0\u1eddng xuy\u00ean, do l\u1ef1c t\u00e1c \u0111\u1ed9ng l\u1edbn n\u00ean c\u1ea7n tr\u1ee5c c\u1ea3ng th\u01b0\u1eddng b\u1ecb l\u00e3o h\u00f3a v\u00e0 h\u01b0 h\u1ecfng c\u00e1c b\u1ed9 ph\u1eadn, sau \u0111\u00f3 ph\u00e1t ra ti\u1ebfng \u1ed3n b\u1ea5t th\u01b0\u1eddng trong qu\u00e1 tr\u00ecnh n\u00e2ng h\u1ea1.<br>V\u00ed d\u1ee5, trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh c\u1ea7n tr\u1ee5c c\u1ea3ng, \u0111i\u1ec3m b\u1ea3n l\u1ec1 d\u01b0\u1edbi c\u1ee7a tay n\u00e2ng do c\u00f3 v\u1eadt l\u1ea1 d\u1ea1ng b\u1ed9t ho\u1eb7c d\u1ea1ng h\u1ea1t, c\u00e1c v\u00edt ch\u1eafn \u0111\u1ea7u tr\u1ee5c b\u1ecb c\u1eaft ho\u1eb7c l\u1ecfng, g\u00e2y ra nh\u1eefng b\u1ea5t th\u01b0\u1eddng v\u00e0 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng c\u1ee7a c\u1ea7n tr\u1ee5c, \u0111\u1ed3ng th\u1eddi g\u00e2y ra m\u1ed9t s\u1ed1 r\u1ee7i ro v\u1ec1 an to\u00e0n.<\/p>\n\n\n\n<p><strong>S\u1ed5 tay b\u1ea3o tr\u00ec 6<\/strong><\/p>\n\n\n\n<p>Trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng c\u1ea7n tr\u1ee5c c\u1ea3ng, \u0111\u1ec3 ng\u0103n ng\u1eeba ti\u1ebfng \u1ed3n b\u1ea5t th\u01b0\u1eddng v\u00e0 c\u00e1c h\u1ecfng h\u00f3c kh\u00e1c t\u1ea1i \u0111i\u1ec3m b\u1ea3n l\u1ec1 d\u01b0\u1edbi c\u1ee7a c\u1ea7n tr\u1ee5c, c\u1ea7n t\u0103ng c\u01b0\u1eddng ki\u1ec3m tra h\u00e0ng ng\u00e0y, si\u1ebft ch\u1eb7t c\u00e1c v\u00edt ch\u1eafn \u0111\u1ea7u tr\u1ee5c k\u1ecbp th\u1eddi v\u00e0 v\u1ec7 sinh s\u1ea1ch c\u00e1c v\u1eadt l\u1ea1.<\/p>\n\n\n\n<p>N\u1ebfu c\u1ea7n tr\u1ee5c c\u1ed5ng c\u1ea3ng c\u00f3 ti\u1ebfng \u1ed3n b\u1ea5t th\u01b0\u1eddng, tr\u01b0\u1edbc ti\u00ean c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n t\u00ednh to\u00e1n v\u00e0 ph\u00e2n t\u00edch l\u1ef1c, sau \u0111\u00f3 c\u00f3 th\u1ec3 thay \u1ed5 tr\u1ee5c l\u0103n. Trong th\u1eddi gian \u0111\u00f3, c\u1ea7n l\u01b0u \u00fd:<\/p>\n\n\n\n<ul>\n<li>\u0110\u1ea7u ti\u00ean, gi\u1eef bi\u00ean \u0111\u1ed9 c\u1ea7n tr\u1ee5c \u1edf \u0111i\u1ec3m c\u00e2n b\u1eb1ng kho\u1ea3ng 25 m, v\u00e0 \u0111\u1ed1i tr\u1ecdng s\u1ed1ng c\u1ee7a h\u1ec7 th\u1ed1ng c\u1ea7n tr\u1ee5c \u0111\u01b0\u1ee3c \u0111\u01b0a qua 2 d\u00e2y c\u00e1p (\u03a632 mm), \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i ch\u1eb7t ch\u1ebd v\u1edbi l\u1ed7 n\u00e2ng ph\u00eda sau khung x\u01b0\u01a1ng c\u00e1 b\u1eb1ng t\u1eddi x\u00edch, v\u00e0 \u00e1p su\u1ea5t c\u1ee7a c\u1ea7n tr\u1ee5c v\u00e0 tr\u1ee5c b\u1ea3n l\u1ec1 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh;&nbsp;<\/li>\n\n\n\n<li>Ph\u00eda tr\u01b0\u1edbc g\u00f3c d\u01b0\u1edbi c\u1ee7a c\u1ea7n tr\u1ee5c, h\u00e0n t\u1ea5m th\u00e9p (20 mm) v\u00e0o gi\u00e1 \u0111\u1ee1, h\u00e0n t\u1ea5m th\u00e9p v\u00e0 c\u00e1c thanh d\u1ecdc \u1edf g\u00f3c d\u01b0\u1edbi c\u1ee7a c\u1ea7n tr\u1ee5c h\u01b0\u1edbng l\u00ean tr\u00ean kho\u1ea3ng 60 mm \u0111\u1ec3 duy tr\u00ec m\u1ed1i quan h\u1ec7 t\u01b0\u01a1ng \u0111\u1ed1i v\u1edbi gi\u00e1 \u0111\u1ee1; \u0110\u1eb7t k\u00edch 25 t\u1ea5n ph\u00eda tr\u00ean gi\u00e1 \u0111\u1ee1 quy tr\u00ecnh \u0111\u1ec3 h\u1ed7 tr\u1ee3.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"in-summary\">T\u00f3m l\u1ea1i<\/h2>\n\n\n\n<p>Trong qu\u00e1 tr\u00ecnh x\u1ebfp d\u1ee1 h\u00e0ng h\u00f3a t\u1ea1i c\u00e1c c\u1ea3ng v\u00e0 b\u1ebfn, c\u1ea7n tr\u1ee5c c\u1ed5ng c\u1ea3ng \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng, nh\u01b0ng m\u00f4i tr\u01b0\u1eddng ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ch\u00fang c\u00f3 \u0111\u1ed9 \u1ea9m kh\u00f4ng kh\u00ed v\u00e0 b\u1ee5i cao, ch\u00fang th\u01b0\u1eddng b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi c\u00e1c y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng b\u00ean ngo\u00e0i v\u00e0 h\u1ecfng h\u00f3c. C\u00f9ng v\u1edbi ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng \u0111\u1ec1u c\u1ee7a nh\u00e2n vi\u00ean, thi\u1ebft b\u1ecb s\u1ebd b\u1ecb h\u01b0 h\u1ecfng nghi\u00eam tr\u1ecdng. Do \u0111\u00f3, b\u00ean qu\u1ea3n l\u00fd thi\u1ebft b\u1ecb n\u00ean ph\u00e2n t\u00edch to\u00e0n di\u1ec7n c\u00e1c h\u1ecfng h\u00f3c th\u01b0\u1eddng g\u1eb7p c\u1ee7a c\u1ea7n tr\u1ee5c c\u1ed5ng c\u1ea3ng trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng, l\u1eadp k\u1ebf ho\u1ea1ch b\u1ea3o tr\u00ec c\u00f3 m\u1ee5c ti\u00eau, th\u1ef1c hi\u1ec7n c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o tr\u00ec v\u00e0 b\u1ea3o d\u01b0\u1ee1ng hi\u1ec7u qu\u1ea3, \u0111\u1ed3ng th\u1eddi ki\u1ec3m tra t\u00ecnh tr\u1ea1ng ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u00e1c b\u1ed9 ph\u1eadn thi\u1ebft b\u1ecb k\u1ecbp th\u1eddi \u0111\u1ec3 gi\u1ea3m kh\u1ea3 n\u0103ng h\u1ecfng h\u00f3c thi\u1ebft b\u1ecb v\u00e0 \u0111\u1ea3m b\u1ea3o thi\u1ebft b\u1ecb ho\u1ea1t \u0111\u1ed9ng an to\u00e0n, hi\u1ec7u qu\u1ea3 v\u00e0 \u0111\u00e1ng tin c\u1eady.<\/p>","protected":false},"excerpt":{"rendered":"V\u1edbi s\u1ef1 m\u1edf r\u1ed9ng kh\u00f4ng ng\u1eebng v\u1ec1 quy m\u00f4 x\u00e2y d\u1ef1ng c\u1ea3ng, b\u1ebfn t\u00e0u, v.v., ph\u1ea1m vi \u1ee9ng d\u1ee5ng c\u1ee7a c\u1ea7n tr\u1ee5c c\u1ed5ng c\u1ea3ng trong ho\u1ea1t \u0111\u1ed9ng c\u1ea3ng c\u0169ng ng\u00e0y c\u00e0ng t\u0103ng. \u0110\u1ec3 ph\u00e1t huy h\u1ebft ch\u1ee9c n\u0103ng c\u1ee7a thi\u1ebft b\u1ecb v\u00e0 duy tr\u00ec s\u1ef1 an to\u00e0n, \u0111\u1ed9 tin c\u1eady c\u1ee7a ho\u1ea1t \u0111\u1ed9ng, c\u1ea7n ph\u1ea3i t\u0103ng c\u01b0\u1eddng c\u00f4ng t\u00e1c b\u1ea3o tr\u00ec v\u00e0 [\u2026]","protected":false},"featured_media":10258,"parent":0,"menu_order":0,"template":"single-SEO-Table.php","posts_category":[197],"posts_tag":[309],"acf":[],"_links":{"self":[{"href":"https:\/\/www.hndfcrane.com\/vi\/wp-json\/wp\/v2\/xmxposts\/10369"}],"collection":[{"href":"https:\/\/www.hndfcrane.com\/vi\/wp-json\/wp\/v2\/xmxposts"}],"about":[{"href":"https:\/\/www.hndfcrane.com\/vi\/wp-json\/wp\/v2\/types\/posts"}],"version-history":[{"count":3,"href":"https:\/\/www.hndfcrane.com\/vi\/wp-json\/wp\/v2\/xmxposts\/10369\/revisions"}],"predecessor-version":[{"id":10384,"href":"https:\/\/www.hndfcrane.com\/vi\/wp-json\/wp\/v2\/xmxposts\/10369\/revisions\/10384"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.hndfcrane.com\/vi\/wp-json\/wp\/v2\/media\/10258"}],"wp:attachment":[{"href":"https:\/\/www.hndfcrane.com\/vi\/wp-json\/wp\/v2\/media?parent=10369"}],"wp:term":[{"taxonomy":"posts_category","embeddable":true,"href":"https:\/\/www.hndfcrane.com\/vi\/wp-json\/wp\/v2\/posts_category?post=10369"},{"taxonomy":"posts_tag","embeddable":true,"href":"https:\/\/www.hndfcrane.com\/vi\/wp-json\/wp\/v2\/posts_tag?post=10369"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}