{"id":2210,"date":"2021-04-21T03:55:47","date_gmt":"2021-04-21T03:55:47","guid":{"rendered":"https:\/\/zlqu95mfyr.wpdns.site\/?p=2210"},"modified":"2021-04-21T08:45:06","modified_gmt":"2021-04-21T08:45:06","slug":"unloading-circuits-of-hydraulic-press","status":"publish","type":"post","link":"https:\/\/avido.cn\/vi\/unloading-circuits-of-hydraulic-press\/","title":{"rendered":"D\u1ee1 m\u1ea1ch c\u1ee7a m\u00e1y \u00e9p th\u1ee7y l\u1ef1c"},"content":{"rendered":"

<\/span>Th\u1eddi gian \u0111\u1ecdc \u01b0\u1edbc t\u00ednh: <\/span>18<\/span> ph\u00fat<\/span><\/p>\n\n\n\n

M\u1ea1ch kh\u00f4ng t\u1ea3i l\u00e0 khi m\u1ea1ch kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng d\u1eabn \u0111\u1ebfn vi\u1ec7c b\u01a1m d\u1ea7u ch\u1ea1y kh\u00f4ng t\u1ea3i. \u01afu \u0111i\u1ec3m l\u00e0 tu\u1ed5i th\u1ecd m\u00e1y b\u01a1m d\u00e0i h\u01a1n, gi\u1ea3m ti\u00eau th\u1ee5 \u0111i\u1ec7n n\u0103ng, gi\u1ea3m sinh nhi\u1ec7t h\u1ec7 th\u1ed1ng, t\u0103ng hi\u1ec7u su\u1ea5t v\u00e0 v\u1eadn h\u00e0nh an to\u00e0n.<\/p>\n\n\n\n

C\u00e2u h\u1ecfi 1: L\u1ef1a ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p d\u1ee1 h\u00e0ng<\/strong><\/h3>\n\n\n\n

1. M\u1ea1ch x\u1ea3 c\u00f3 van \u0111\u1ea3o chi\u1ec1u<\/strong><\/strong><\/p>\n\n\n\n

H\u00ecnh 1-1 l\u00e0 m\u1ed9t trong nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p d\u1ee1 t\u1ea3i \u0111\u01a1n gi\u1ea3n nh\u1ea5t, th\u01b0\u1eddng ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng c\u00f3 t\u1ed1c \u0111\u1ed9 d\u00f2ng ch\u1ea3y nh\u1ecf, \u0111\u1ed1i v\u1edbi \u00e1p su\u1ea5t cao v\u00e0 t\u1ed1c \u0111\u1ed9 d\u00f2ng ch\u1ea3y l\u1edbn (> 3.5MPa, 40L \/ ph\u00fat) m\u1ea1ch s\u1ebd t\u1ea1o ra ch\u1ea5n \u0111\u1ed9ng.<\/p>\n\n\n\n

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1-1 M\u1ea1ch x\u1ea3 v\u1edbi van \u0111\u1ea3o chi\u1ec1u<\/p>\n\n\n\n

2. M\u1edf m\u1ea1ch b\u1eb1ng van hai chi\u1ec1u<\/strong><\/strong><\/p>\n\n\n\n

H\u00ecnh 1-2 m\u00f4 t\u1ea3 m\u1ed9t van hai chi\u1ec1u ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng tay \u0111\u1ec3 d\u1ee1 t\u1ea3i m\u1ea1ch \u0111i\u1ec7n. H\u00ecnh 1-3 cho th\u1ea5y m\u1ed9t van hai chi\u1ec1u \u0111\u01b0\u1ee3c v\u1eadn h\u00e0nh b\u1edfi m\u1ed9t cam \u0111\u1ec3 khi xi lanh \u0111\u1ea1t \u0111\u1ebfn cu\u1ed1i h\u00e0nh tr\u00ecnh quay tr\u1edf l\u1ea1i c\u1ee7a n\u00f3, van hai chi\u1ec1u s\u1ebd t\u1ef1 ho\u1ea1t \u0111\u1ed9ng v\u00e0 d\u1ea7u t\u1eeb b\u01a1m \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi b\u1ed3n ch\u1ee9a.<\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

1-2 M\u1edf m\u1ea1ch b\u1eb1ng van hai chi\u1ec1u b\u1eb1ng tay<\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

1-3 M\u1edf m\u1ea1ch b\u1eb1ng van hai chi\u1ec1u c\u00f3 \u0111\u1ed9ng c\u01a1<\/p>\n\n\n\n

3. D\u1ee1 m\u1ea1ch b\u1eb1ng b\u1ed9 t\u00edch l\u0169y<\/strong><\/strong><\/p>\n\n\n\n

Vi\u1ec7c s\u1eed d\u1ee5ng m\u1ea1ch d\u1ee1 \u1eafc quy, th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong thi\u1ebft b\u1ecb k\u1eb9p, v\u00ec m\u1ea1ch c\u00f3 \u1eafc quy, trong c\u00f4ng vi\u1ec7c k\u1eb9p l\u00e2u d\u00e0i, c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u1eafc quy v\u00e0o m\u1ea1ch \u0111\u1ec3 t\u1ea1o \u00e1p v\u00e0 b\u1ed5 sung s\u1ef1 r\u00f2 r\u1ec9 c\u1ee7a c\u00e1c linh ki\u1ec7n, v\u00e0 b\u01a1m d\u1ea7u th\u00f4i. kh\u00f4ng li\u00ean t\u1ee5c v\u1edbi c\u00f4ng vi\u1ec7c t\u1ea3i. Trong m\u1ea1ch n\u00e0y, th\u01b0\u1eddng c\u00f3 m\u1ed9t van m\u1ed9t chi\u1ec1u.<\/p>\n\n\n\n

H\u00ecnh 1-4 s\u1eed d\u1ee5ng van hai chi\u1ec1u th\u1ee7y l\u1ef1c, van n\u00e0y \u0111\u01b0\u1ee3c m\u1edf khi m\u1ea1ch \u0111i\u1ec7n \u0111\u1ea1t y\u00eau c\u1ea7u \u00e1p su\u1ea5t nh\u1ea5t \u0111\u1ecbnh, cho ph\u00e9p b\u01a1m kh\u00f4ng t\u1ea3i. H\u00ecnh 1-5 m\u00f4 t\u1ea3 m\u1ed9t m\u1ea1ch \u0111i\u1ec7n s\u1eed d\u1ee5ng r\u01a1 le \u00e1p su\u1ea5t v\u00e0 van hai chi\u1ec1u \u0111i\u1ec7n t\u1eeb. Khi \u00e1p su\u1ea5t trong m\u1ea1ch \u0111\u1ea1t \u0111\u1ebfn m\u1ed9t gi\u00e1 tr\u1ecb nh\u1ea5t \u0111\u1ecbnh, r\u01a1 le \u00e1p su\u1ea5t s\u1ebd t\u00e1c \u0111\u1ed9ng van \u0111i\u1ec7n t\u1eeb \u0111\u1ec3 b\u01a1m kh\u00f4ng t\u1ea3i.<\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

1-4 M\u1ea1ch d\u1ee1 t\u1ea3i v\u1edbi van hai chi\u1ec1u th\u1ee7y l\u1ef1c<\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

1-5 M\u1ea1ch x\u1ea3 \u00e1p v\u1edbi r\u01a1 le \u00e1p su\u1ea5t v\u00e0 van 2 chi\u1ec1u \u0111i\u1ec7n t\u1eeb<\/p>\n\n\n\n

4. D\u1ee1 m\u1ea1ch b\u1eb1ng van x\u1ea3 \u0111i\u1ec1u khi\u1ec3n b\u1eb1ng ch\u1ea5t l\u1ecfng<\/strong><\/strong><\/p>\n\n\n\n

Trong H\u00ecnh 1-6, c\u1ed5ng \u0111i\u1ec1u khi\u1ec3n t\u1eeb xa c\u1ee7a van x\u1ea3 \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi van hai chi\u1ec1u \u0111i\u1ec7n t\u1eeb, c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec1u khi\u1ec3n t\u1ef1 \u0111\u1ed9ng do vi\u1ec7c s\u1eed d\u1ee5ng van \u0111i\u1ec7n t\u1eeb, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u00e1y m\u00f3c n\u00f3i chung v\u00e0 m\u00e1y r\u00e8n. . Van \u0111i\u1ec7n t\u1eeb \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n b\u1edfi r\u01a1 le \u00e1p su\u1ea5t trong m\u1ea1ch, \u0111\u1ec3 khi \u00e1p su\u1ea5t d\u1ea7u trong m\u1ea1ch \u0111\u1ea1t \u0111\u1ebfn \u00e1p su\u1ea5t nh\u1ea5t \u0111\u1ecbnh th\u00ec van hai chi\u1ec1u \u0111i\u1ec7n t\u1eeb s\u1ebd m\u1edf ra cho ph\u00e9p b\u01a1m d\u1ea7u kh\u00f4ng t\u1ea3i. Van m\u1ed9t chi\u1ec1u \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 duy tr\u00ec \u00e1p su\u1ea5t trong m\u1ea1ch khi b\u01a1m d\u1ea7u kh\u00f4ng t\u1ea3i. Trong m\u1ea1ch n\u00e0y, van hai chi\u1ec1u \u0111i\u1ec7n t\u1eeb ch\u1ec9 x\u1ea3 d\u00f2ng d\u1ea7u qua c\u1ed5ng xa c\u1ee7a van x\u1ea3, kh\u00f4ng ph\u1ea3i l\u00e0 t\u1ed1c \u0111\u1ed9 d\u00f2ng l\u1edbn n\u00ean c\u00f3 th\u1ec3 d\u00f9ng van hai chi\u1ec1u k\u00edch th\u01b0\u1edbc nh\u1ecf.<\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

1-6 M\u1ea1ch x\u1ea3 c\u1ee7a van x\u1ea3 ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng ch\u1ea5t l\u1ecfng<\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

1-7 M\u1ea1ch x\u1ea3 c\u1ee7a van x\u1ea3 ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng ch\u1ea5t l\u1ecfng<\/p>\n\n\n\n

T\u00ecnh hu\u1ed1ng trong H\u00ecnh 1-7 t\u01b0\u01a1ng t\u1ef1 nh\u01b0 tr\u00ean, ngo\u1ea1i tr\u1eeb m\u1ed9t van tu\u1ea7n t\u1ef1 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 v\u1eadn h\u00e0nh van hai chi\u1ec1u th\u1ee7y l\u1ef1c v\u00e0 \u0111i\u1ec1u khi\u1ec3n \u00e1p su\u1ea5t trong m\u1ea1ch.<\/p>\n\n\n\n

Khi van x\u1ea3 \u0111\u01b0\u1ee3c l\u1eafp v\u1edbi d\u00e2y \u0111i\u1ec1u khi\u1ec3n, th\u1ec3 t\u00edch c\u1ee7a bu\u1ed3ng \u0111i\u1ec1u khi\u1ec3n t\u0103ng l\u00ean, \u0111i\u1ec1u n\u00e0y s\u1ebd t\u1ea1o ra ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng \u1ed5n \u0111\u1ecbnh, v\u00ec l\u00fd do n\u00e0y, m\u1ed9t van \u0111i\u1ec1u ti\u1ebft \u0111\u01b0\u1ee3c th\u00eam v\u00e0o d\u00e2y chuy\u1ec1n \u0111\u1ec3 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t c\u1ee7a n\u00f3.<\/p>\n\n\n\n

5. Vi\u1ec7c s\u1eed d\u1ee5ng m\u1ea1ch d\u1ee1 b\u01a1m h\u1ed7n h\u1ee3p<\/strong><\/strong><\/p>\n\n\n\n

Trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh m\u00e1y c\u00f4ng c\u1ee5, c\u00e1n th\u00e9p v\u00e0 c\u00e1c thi\u1ebft b\u1ecb kh\u00e1c, xi lanh c\u1ea7n m\u1ed9t l\u01b0\u1ee3ng d\u1ea7u l\u1edbn v\u00e0 t\u1ed1c \u0111\u1ed9 l\u00e0m vi\u1ec7c cao, hai m\u00e1y b\u01a1m c\u00f9ng m\u1ed9t l\u00fac \u0111\u1ebfn m\u1ea1ch \u0111\u1ec3 \u0111\u01b0a d\u1ea7u (ch\u1eb3ng h\u1ea1n nh\u01b0 qu\u00e1 tr\u00ecnh c\u1ea5p ph\u00f4i c\u1ee7a m\u00e1y c\u00f4ng c\u1ee5), nh\u01b0 h\u00ecnh 1-8. Tuy nhi\u00ean, xi lanh ti\u1ebfn t\u1edbi ti\u1ebfp x\u00fac v\u1edbi ph\u00f4i, do \u0111\u00f3 khi \u00e1p su\u1ea5t d\u1ea7u t\u0103ng, van kh\u00f4ng t\u1ea3i m\u1edf ra, khi \u0111\u00f3 b\u01a1m d\u1ea7u l\u1edbn \u00e1p su\u1ea5t th\u1ea5p ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng t\u1ea3i, ch\u1ec9 do b\u01a1m d\u1ea7u cao \u00e1p nh\u1ecf \u0111\u1ebfn m\u1ea1ch c\u1ea5p d\u1ea7u. .<\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

1-8 D\u1ee1 m\u1ea1ch v\u1edbi m\u00e1y b\u01a1m h\u1ed7n h\u1ee3p<\/p>\n\n\n\n

6. M\u1ea1ch c\u00f3 b\u01a1m bi\u1ebfn thi\u00ean b\u00f9 \u00e1p<\/strong><\/strong><\/p>\n\n\n\n

M\u1ea1ch \u0111i\u1ec7n trong h\u00ecnh 1-9 l\u00e0 m\u1ed9t m\u00e1y b\u01a1m d\u1ea7u bi\u1ebfn thi\u00ean c\u00f3 ch\u1ee9c n\u0103ng b\u00f9 (\u0111i\u1ec1u khi\u1ec3n) l\u01b0\u1ee3ng d\u1ea7u theo \u00e1p su\u1ea5t \u0111\u1ea7u ra c\u1ee7a m\u00e1y b\u01a1m, gi\u00fap ti\u1ebft ki\u1ec7m \u0111i\u1ec7n n\u0103ng c\u1ee7a m\u00e1y b\u01a1m. Nh\u01b0 h\u00ecnh 1-9, s\u1eed d\u1ee5ng van \u0111\u1ea3o chi\u1ec1u c\u00f3 ch\u1eb7n trung t\u00ednh (lo\u1ea1i O), khi van \u1edf v\u1ecb tr\u00ed gi\u1eefa, b\u01a1m ch\u1ec9 cung c\u1ea5p l\u01b0\u1ee3ng d\u1ea7u m\u00e0 van b\u1ecb r\u00f2 r\u1ec9, do \u0111\u00f3 ti\u1ebft ki\u1ec7m \u0111i\u1ec7n n\u0103ng.<\/p>\n\n\n\n

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1-9 M\u1ea1ch c\u00f3 b\u01a1m bi\u1ebfn thi\u00ean b\u00f9 \u00e1p<\/p>\n\n\n\n

7. M\u1ea1ch n\u1ea1p cho h\u1ec7 th\u1ed1ng nhi\u1ec1u xi lanh<\/strong><\/strong><\/p>\n\n\n\n

Nh\u01b0 trong h\u00ecnh 1-10, m\u1ed9t m\u00e1y b\u01a1m \u0111\u1ebfn nhi\u1ec1u h\u01a1n hai xi lanh khi c\u1ea5p d\u1ea7u, van b\u1ed1n chi\u1ec1u v\u00e0 van hai chi\u1ec1u \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i ho\u1ea1t \u0111\u1ed9ng, khi van \u0111\u1ea3o chi\u1ec1u xi lanh \u1edf v\u1ecb tr\u00ed gi\u1eefa th\u00ec m\u00e1y b\u01a1m ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng t\u1ea3i. (m\u1ea1ch n\u00e0y hi\u1ec7n \u0111\u01b0\u1ee3c d\u00f9ng trong m\u1ea1ch van \u0111\u1ea3o chi\u1ec1u nhi\u1ec1u chi\u1ec1u).<\/p>\n\n\n\n

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1-10 M\u1ea1ch n\u1ea1p cho h\u1ec7 th\u1ed1ng nhi\u1ec1u xi lanh<\/p>\n\n\n\n

C\u00e2u h\u1ecfi 2: L\u1ef1a ch\u1ecdn van kh\u00f4ng t\u1ea3i<\/strong><\/strong><\/h3>\n\n\n\n

Tr\u01b0\u1edbc ti\u00ean, h\u00e3y l\u01b0u \u00fd s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa van x\u1ea3 t\u1ea3i v\u00e0 van tr\u00ecnh t\u1ef1 \u0111i\u1ec1u khi\u1ec3n b\u00ean ngo\u00e0i \u0111\u1ed1i v\u1edbi van x\u1ea3 t\u1ea3i, van x\u1ea3 t\u1ea3i ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u1ea1ch th\u1ee7y l\u1ef1c \u0111\u01b0\u1ee3c trang b\u1ecb b\u1ed9 t\u00edch l\u0169y, khi \u00e1p su\u1ea5t n\u1ea1p \u0111\u1ea7y b\u1ed9 t\u00edch l\u0169y \u0111\u1ea1t \u0111\u1ebfn \u00e1p su\u1ea5t \u0111\u1eb7t c\u1ee7a van x\u1ea3 t\u1ea3i , n\u00f3 t\u1ef1 \u0111\u1ed9ng l\u00e0m cho b\u01a1m th\u1ee7y l\u1ef1c kh\u00f4ng t\u1ea3i. Van x\u1ea3 kh\u00f4ng t\u1ea3i, \u0111\u01b0\u1ee3c l\u1eafp v\u1edbi m\u1ed9t van m\u1ed9t chi\u1ec1u, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ng\u0103n ch\u1eb7n d\u1ea7u c\u00f3 \u00e1p su\u1ea5t trong b\u1ed9 t\u00edch \u0111i\u1ec7n ch\u1ea3y ng\u01b0\u1ee3c l\u1ea1i khi b\u1ed9 t\u00edch cung c\u1ea5p d\u1ea7u cho h\u1ec7 th\u1ed1ng v\u00e0 duy tr\u00ec \u00e1p su\u1ea5t. Khi \u00e1p su\u1ea5t ch\u1ea5t l\u1ecfng trong b\u1ed9 t\u00edch l\u0169y gi\u1ea3m xu\u1ed1ng kho\u1ea3ng 85% \u00e1p su\u1ea5t \u0111\u1eb7t c\u1ee7a van x\u1ea3 t\u1ea3i, van x\u1ea3 t\u1ea3i \u0111\u00f3ng l\u1ea1i v\u00e0 b\u01a1m th\u1ee7y l\u1ef1c ti\u1ebfp t\u1ee5c l\u00e0m \u0111\u1ea7y b\u1ed9 t\u00edch l\u0169y.<\/p>\n\n\n\n

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1-11 Van gi\u1ea3m t\u1ea3i v\u1eadn h\u00e0nh b\u1eb1ng th\u00ed \u0111i\u1ec3m \u0111\u01b0\u1ee3c \u01b0u ti\u00ean cho c\u00e1c h\u1ec7 th\u1ed1ng th\u1ee7y l\u1ef1c c\u00f3 th\u1eddi gian kh\u00f4ng t\u1ea3i d\u00e0i<\/p>\n\n\n\n

1 - b\u01a1m th\u1ee7y l\u1ef1c 2, 3 - van<\/p>\n\n\n\n

Th\u1ee9 hai, c\u00e1c h\u1ec7 th\u1ed1ng th\u1ee7y l\u1ef1c c\u00f3 th\u1eddi gian d\u1ee1 t\u1ea3i l\u00e2u n\u00ean s\u1eed d\u1ee5ng van gi\u1ea3m t\u1ea3i v\u1eadn h\u00e0nh b\u1eb1ng pilot. H\u00ecnh 1-11 (a) m\u00f4 t\u1ea3 m\u1ed9t h\u1ec7 th\u1ed1ng th\u1ee7y l\u1ef1c y\u00eau c\u1ea7u kho\u1ea3ng th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng d\u00e0i v\u00e0 chuy\u1ec3n \u0111\u1ed9ng t\u1ed1c \u0111\u1ed9 cao c\u1ee7a ph\u1ea7n t\u1eed truy\u1ec1n \u0111\u1ed9ng. Khi xi lanh th\u1ee7y l\u1ef1c ng\u1eebng chuy\u1ec3n \u0111\u1ed9ng, \u00e1p su\u1ea5t \u0111\u1ea7u ra c\u1ee7a b\u01a1m th\u1ee7y l\u1ef1c 1 cao v\u00e0 th\u1ea5p, kh\u00f4ng t\u1ea3i li\u00ean t\u1ee5c d\u1eabn \u0111\u1ebfn h\u1ec7 th\u1ed1ng ti\u00eau th\u1ee5 \u0111i\u1ec7n n\u0103ng cao v\u00e0 nhi\u1ec7t \u0111\u1ed9 d\u1ea7u cao. \u0110i\u1ec1u n\u00e0y l\u00e0 do m\u1ed9t th\u00e0nh ph\u1ea7n trong m\u1ea1ch ho\u1eb7c \u0111\u01b0\u1eddng \u1ed1ng r\u00f2 r\u1ec9, van tr\u00ecnh t\u1ef1 \u0111i\u1ec1u khi\u1ec3n b\u00ean ngo\u00e0i \u0111\u00f3ng m\u1edf l\u1eb7p l\u1ea1i g\u00e2y ra. Do \u0111\u00f3, H\u00ecnh 1-11 (b) ch\u1ecdn van x\u1ea3 d\u1eabn h\u01b0\u1edbng kh\u00f4ng t\u1ea3i \u0111\u1ec3 thay th\u1ebf van m\u1ea1ch 2 v\u00e0 van 3 ban \u0111\u1ea7u, kh\u00f4ng t\u1ea3i, p\u00edt t\u00f4ng v\u00e0o \u1ed1ng d\u1eabn van hoa ti\u00eau \u0111\u1ec3 t\u00e1c d\u1ee5ng m\u1ed9t l\u1ef1c \u0111\u1ea9y b\u1ed5 sung \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng \u0111\u01b0\u1eddng d\u1eabn kh\u00f4ng t\u1ea3i c\u1ee7a m\u00e1y b\u01a1m 1 \u0111\u01b0\u1ee3c m\u1edf. , ngay c\u1ea3 khi m\u1ea1ch \u0111i\u1ec7n b\u1ecb r\u00f2 r\u1ec9 \u0111\u1ec3 gi\u1ea3m \u00e1p su\u1ea5t trong b\u1ed9 t\u00edch \u0111i\u1ec7n, n\u00f3 c\u00f3 th\u1ec3 l\u00e0m cho m\u00e1y b\u01a1m 1 \u1edf tr\u1ea1ng th\u00e1i kh\u00f4ng t\u1ea3i li\u00ean t\u1ee5c \u0111\u1ec3 \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n\n\n\n

C\u00e2u 3: Thi\u1ebft k\u1ebf m\u1ea1ch kh\u00f4ng t\u1ea3i<\/strong><\/strong><\/h3>\n\n\n\n

Trong h\u1ec7 th\u1ed1ng h\u00ecnh 1-12, b\u01a1m th\u1ee7y l\u1ef1c \u0111\u1ecbnh l\u01b0\u1ee3ng, ch\u1ee9c n\u0103ng trung t\u00ednh c\u1ee7a van \u0111\u1ea3o chi\u1ec1u ba ng\u1ea3 l\u00e0 ki\u1ec3u ch\u1eef Y, v\u00e0 xi lanh th\u1ee7y l\u1ef1c kh\u00f4ng t\u00e1c \u0111\u1ed9ng khi van \u0111\u1ea3o chi\u1ec1u ba ng\u1ea3 v\u1ec1 v\u1ecb tr\u00ed trung t\u00ednh. . Vi\u1ec7c d\u1ee1 t\u1ea3i h\u1ec7 th\u1ed1ng l\u00e0 do van x\u1ea3 v\u1eadn h\u00e0nh b\u1eb1ng pilot v\u00e0 m\u1ea1ch d\u1ee1 van \u0111i\u1ec7n t\u1eeb hai v\u1ecb tr\u00ed hai chi\u1ec1u, l\u00fac n\u00e0y c\u00f3 th\u1ec3 l\u00e0 c\u1ed5ng \u0111i\u1ec1u khi\u1ec3n t\u1eeb xa th\u00f4ng qua van \u0111i\u1ec7n t\u1eeb nh\u1ecf v\u00e0 th\u00f9ng d\u1ea7u \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i khi nam ch\u00e2m \u0111i\u1ec7n t\u1eaft ngu\u1ed3n, hai v\u1ecb tr\u00ed hai chi\u1ec1u van \u0111i\u1ec7n t\u1eeb ti\u1ebfp c\u1eadn b\u1ecb c\u1eaft, h\u1ec7 th\u1ed1ng ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng; khi nam ch\u00e2m \u0111i\u1ec7n b\u1eadt ngu\u1ed3n, van \u0111i\u1ec7n t\u1eeb hai v\u1ecb tr\u00ed hai chi\u1ec1u \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i, do \u0111\u00f3, \u00e1p su\u1ea5t tr\u00ean ph\u1ea7n tr\u00ean c\u1ee7a \u1ed1ng ch\u00ednh c\u1ee7a van gi\u1ea3m \u00e1p g\u1ea7n b\u1eb1ng kh\u00f4ng, \u1ed1ng cu\u1ed9n l\u00ean \u0111\u1ec3 nh\u1eadn v\u1ecb tr\u00ed cao nh\u1ea5t, v\u00ec van Ph\u1ea7n tr\u00ean c\u1ee7a l\u00f2 xo \u1ed1ng m\u1ec1m n\u00ean l\u00fac n\u00e0y \u00e1p su\u1ea5t t\u1ea1i c\u1eeda d\u1ea7u \u00e1p su\u1ea5t r\u1ea5t th\u1ea5p v\u00e0 van x\u1ea3 \u00e1p l\u00e0m cho to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng kh\u00f4ng t\u1ea3i \u1edf \u00e1p su\u1ea5t th\u1ea5p.<\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

1-12 Th\u00ed \u0111i\u1ec3m M\u1ea1ch \u0111i\u1ec1u khi\u1ec3n \u00e1p su\u1ea5t van gi\u1ea3m \u00e1p \u0111\u00e3 v\u1eadn h\u00e0nh<\/p>\n\n\n\n

C\u00e1c v\u1ea5n \u0111\u1ec1: <\/strong><\/strong><\/p>\n\n\n\n

Khi h\u1ec7 th\u1ed1ng th\u1ee7y l\u1ef1c \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t v\u00e0 v\u1eadn h\u00e0nh, h\u1ec7 th\u1ed1ng \u0111\u00e3 b\u1ecb rung v\u00e0 \u1ed3n.<\/p>\n\n\n\n

Ng\u01b0\u1eddi ta nh\u1eadn th\u1ea5y r\u1eb1ng \u0111\u1ed9 rung v\u00e0 ti\u1ebfng \u1ed3n \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1edfi van x\u1ea3. Th\u00e1o l\u1eafp v\u00e0 ki\u1ec3m tra van x\u1ea3, c\u00e1c b\u1ed9 ph\u1eadn c\u1ee7a van, c\u00e1c b\u1ed9 ph\u1eadn chuy\u1ec3n \u0111\u1ed9ng c\u00f3 khe h\u1edf, \u0111\u1ed9 s\u1ea1ch c\u1ee7a van, c\u00e1ch l\u1eafp \u0111\u1eb7t v\u00e0 c\u00e1c kh\u00eda c\u1ea1nh kh\u00e1c ph\u00f9 h\u1ee3p v\u1edbi y\u00eau c\u1ea7u thi\u1ebft k\u1ebf. Van x\u1ea3 \u0111\u00e3 \u0111\u01b0\u1ee3c th\u1eed nghi\u1ec7m tr\u00ean b\u0103ng gh\u1ebf th\u1eed nghi\u1ec7m, c\u00e1c th\u00f4ng s\u1ed1 ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng v\u00e0 s\u1ef1 c\u1ed1 x\u1ea3y ra khi h\u1ec7 th\u1ed1ng \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t.<\/p>\n\n\n\n

Sau nhi\u1ec1u l\u1ea7n th\u1eed nghi\u1ec7m v\u00e0 ph\u00e2n t\u00edch, nh\u1eadn th\u1ea5y r\u1eb1ng m\u1ea1ch kh\u00f4ng t\u1ea3i, c\u1ed5ng \u0111i\u1ec1u khi\u1ec3n t\u1eeb xa van x\u1ea3 \u0111\u1ebfn van \u0111i\u1ec7n t\u1eeb hai chi\u1ec1u hai v\u1ecb tr\u00ed gi\u1eefa qu\u1ea7n th\u1ec3 c\u1ee7a chi\u1ec1u d\u00e0i \u0111\u01b0\u1eddng \u1ed1ng l\u00e0 ng\u1eafn, van x\u1ea3 kh\u00f4ng t\u1ea1o ra rung \u0111\u1ed9ng v\u00e0 ti\u1ebfng \u1ed3n, khi Chi\u1ec1u d\u00e0i \u0111\u01b0\u1eddng \u1ed1ng l\u1edbn h\u01a1n 1m, van x\u1ea3 s\u1ebd t\u1ea1o ra rung \u0111\u1ed9ng v\u00e0 ti\u1ebfng \u1ed3n b\u1ea5t th\u01b0\u1eddng.<\/p>\n\n\n\n

S\u1ef1 c\u1ed1 l\u00e0 do t\u0103ng th\u1ec3 t\u00edch c\u1ee7a khoang \u0111i\u1ec1u khi\u1ec3n c\u1ee7a van gi\u1ea3m \u00e1p (khoang ph\u00eda tr\u01b0\u1edbc c\u1ee7a van hoa ti\u00eau). Th\u1ec3 t\u00edch khoang c\u00e0ng l\u1edbn c\u00e0ng kh\u00f4ng \u1ed5n \u0111\u1ecbnh v\u00e0 \u0111\u01b0\u1eddng \u1ed1ng d\u00e0i d\u1ec5 b\u1ecb s\u00f3t l\u1ea1i - m\u1ed9t s\u1ed1 kh\u00f4ng kh\u00ed, do \u0111\u00f3 d\u1ea7u trong khoang \u1edf van \u0111\u1ea3o chi\u1ec1u hai v\u1ecb tr\u00ed hai chi\u1ec1u \u0111i qua ho\u1eb7c b\u1ecb \u0111\u1ee9t, dao \u0111\u1ed9ng \u00e1p su\u1ea5t c\u00e0ng l\u1edbn. , khi\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a van (ho\u1eb7c van ch\u00ednh) h\u1ec7 th\u1ed1ng l\u00f2 xo t\u1ef1 k\u00edch th\u00edch dao \u0111\u1ed9ng v\u00e0 t\u1ea1o ra ti\u1ebfng \u1ed3n, ti\u1ebfng \u1ed3n \u0111\u00f3 c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 ti\u1ebfng hu\u00fdt s\u00e1o t\u1ea7n s\u1ed1 cao.<\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

Dung d\u1ecbch:<\/strong><\/strong><\/p>\n\n\n\n

Khi \u0111i\u1ec1u ch\u1ec9nh \u00e1p su\u1ea5t t\u1eeb xa ho\u1eb7c th\u00e1o van gi\u1ea3m \u00e1p, \u0111\u01b0\u1eddng \u1ed1ng \u0111i\u1ec1u khi\u1ec3n t\u1eeb xa c\u00e0ng ng\u1eafn v\u00e0 m\u1ecfng c\u00e0ng t\u1ed1t, gi\u1ea3m th\u1ec3 t\u00edch khoang ho\u1eb7c \u0111\u1eb7t l\u1ed7 gi\u1ea3m ch\u1ea5n c\u1ed1 \u0111\u1ecbnh \u0111\u1ec3 gi\u1ea3m s\u1ed1c \u00e1p su\u1ea5t v\u00e0 dao \u0111\u1ed9ng \u00e1p su\u1ea5t. L\u1ed7 gi\u1ea3m ch\u1ea5n c\u1ed1 \u0111\u1ecbnh l\u00e0 m\u1ed9t b\u1ed9 ph\u1eadn \u0111i\u1ec1u ti\u1ebft c\u1ed1 \u0111\u1ecbnh, c\u1ea7n \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t c\u00e0ng g\u1ea7n c\u1ed5ng \u0111i\u1ec1u khi\u1ec3n t\u1eeb xa c\u1ee7a van gi\u1ea3m \u00e1p c\u00e0ng t\u1ed1t, ng\u0103n c\u00e1ch bu\u1ed3ng \u0111i\u1ec1u khi\u1ec3n c\u1ee7a van gi\u1ea3m ch\u1ea5n kh\u1ecfi \u0111\u01b0\u1eddng \u1ed1ng \u0111i\u1ec1u khi\u1ec3n, \u0111\u1ec3 \u00e1p su\u1ea5t ch\u1ea5t l\u1ecfng b\u1ecb s\u1ed1c v\u00e0 dao \u0111\u1ed9ng. \u0111\u01b0\u1ee3c l\u00e0m suy gi\u1ea3m nhanh ch\u00f3ng, lo\u1ea1i b\u1ecf hi\u1ec7u qu\u1ea3 \u0111\u1ed9 rung v\u00e0 \u00e2m thanh r\u00edt c\u1ee7a van x\u1ea3.<\/p>\n\n\n\n

Khi d\u1ea7u t\u1eeb c\u1ed5ng \u0111i\u1ec1u khi\u1ec3n t\u1eeb xa c\u1ee7a van x\u1ea3 \u0111\u01b0\u1ee3c ti\u1ebft l\u01b0u tr\u1edf l\u1ea1i b\u1ec3 ch\u1ee9a, n\u00f3 s\u1ebd l\u00e0m t\u0103ng \u00e1p su\u1ea5t c\u1ee7a d\u1ea7u trong khoang \u0111i\u1ec1u khi\u1ec3n v\u00e0 do \u0111\u00f3 \u00e1p su\u1ea5t x\u1ea3 c\u1ee7a h\u1ec7 th\u1ed1ng s\u1ebd t\u0103ng l\u00ean t\u01b0\u01a1ng \u1ee9ng. \u0110\u1ec3 ng\u0103n \u00e1p su\u1ea5t kh\u00f4ng t\u1ea3i c\u1ee7a h\u1ec7 th\u1ed1ng t\u0103ng qu\u00e1 m\u1ee9c, l\u1ed7 gi\u1ea3m ch\u1ea5n c\u1ee7a ph\u1ea7n t\u1eed \u0111i\u1ec1u ti\u1ebft c\u1ed1 \u0111\u1ecbnh kh\u00f4ng \u0111\u01b0\u1ee3c qu\u00e1 nh\u1ecf, mi\u1ec5n l\u00e0 n\u00f3 c\u00f3 th\u1ec3 lo\u1ea1i b\u1ecf rung \u0111\u1ed9ng v\u00e0 ti\u1ebfng \u1ed3n. H\u01a1n n\u1eefa, n\u1ebfu c\u00e1c l\u1ed7 qu\u00e1 nh\u1ecf, ch\u00fang s\u1ebd d\u1ec5 b\u1ecb t\u1eafc ngh\u1ebdn v\u00e0 h\u1ec7 th\u1ed1ng s\u1ebd kh\u00f4ng th\u1ec3 t\u1ea3i. Trong th\u1ef1c t\u1ebf, c\u00e1c l\u1ed7 gi\u1ea3m ch\u1ea5n l\u1edbn h\u01a1n v\u00e0 d\u00e0i h\u01a1n \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ee9ng minh l\u00e0 c\u00f3 hi\u1ec7u qu\u1ea3 h\u01a1n trong vi\u1ec7c ki\u1ec3m so\u00e1t \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a ch\u1ea5t l\u1ecfng so v\u1edbi c\u00e1c l\u1ed7 gi\u1ea3m ch\u1ea5n ng\u1eafn h\u01a1n v\u00e0 m\u1ecfng h\u01a1n.<\/p>\n\n\n\n

C\u00e2u h\u1ecfi 4: C\u00e1c v\u1ea5n \u0111\u1ec1 trong thi\u1ebft k\u1ebf m\u1ea1ch kh\u00f4ng t\u1ea3i<\/strong><\/strong><\/h3>\n\n\n\n

1. V\u1ea5n \u0111\u1ec1 n\u1edbi l\u1ecfng h\u1ec7 th\u1ed1ng k\u1eb9p th\u1ee7y l\u1ef1c<\/strong><\/strong><\/p>\n\n\n\n

Nh\u01b0 trong H\u00ecnh 1-13 (a) \u0111\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng th\u1ee7y l\u1ef1c k\u1eb9p ph\u00f4i c\u1ee7a m\u00e1y c\u00f4ng c\u1ee5, khi van th\u1ee9 t\u1ef1 1 \u0111\u00f3ng, b\u01a1m th\u1ee7y l\u1ef1c kh\u00f4ng th\u1ec3 l\u1ea5p \u0111\u1ea7y b\u1ed9 t\u00edch \u0111i\u1ec7n ngay l\u1eadp t\u1ee9c, d\u1eabn \u0111\u1ebfn hi\u1ec7n t\u01b0\u1ee3ng ph\u00f4i th\u01b0\u1eddng b\u1ecb l\u1ecfng ho\u1eb7c th\u1eadm ch\u00ed r\u01a1i ra, H\u1ec7 th\u1ed1ng n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng H\u00ecnh 1-13 (b), c\u00f4ng vi\u1ec7c c\u1ee7a van \u0111\u1ea3o chi\u1ec1u b\u1eb1ng tay \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf v\u1ecb tr\u00ed b\u00ean tr\u00e1i, b\u01a1m \u0111\u1ebfn b\u1ed9 t\u00edch l\u0169y v\u00e0 cung c\u1ea5p d\u1ea7u xi lanh th\u1ee7y l\u1ef1c, v\u00e0 \u0111\u1ea9y piston sang ph\u1ea3i. Khi ti\u1ebfp x\u00fac v\u1edbi ph\u00f4i, \u00e1p su\u1ea5t h\u1ec7 th\u1ed1ng t\u0103ng l\u00ean cho \u0111\u1ebfn khi r\u01a1 le \u00e1p su\u1ea5t g\u1eedi t\u00edn hi\u1ec7u c\u1ea5p \u0111i\u1ec7n cho van \u0111i\u1ec7n t\u1eeb 2 v\u00e0 kh\u00f4ng t\u1ea3i m\u00e1y b\u01a1m qua van 3, b\u1ed9 t\u00edch \u00e1p duy tr\u00ec \u00e1p su\u1ea5t h\u1ec7 th\u1ed1ng v\u00e0 b\u1ed5 sung r\u00f2 r\u1ec9 h\u1ec7 th\u1ed1ng. Khi \u00e1p su\u1ea5t gi\u1ea3m \u0111\u1ebfn gi\u1edbi h\u1ea1n d\u01b0\u1edbi c\u1ee7a r\u01a1 le \u00e1p su\u1ea5t, r\u01a1 le ng\u1eaft \u0111i\u1ec7n cho van \u0111i\u1ec7n t\u1eeb v\u00e0 b\u01a1m th\u1ee7y l\u1ef1c ti\u1ebfp t\u1ee5c cung c\u1ea5p d\u1ea7u cho h\u1ec7 th\u1ed1ng v\u00e0 b\u1ed9 t\u00edch \u00e1p. V\u00ed d\u1ee5 n\u00e0y minh h\u1ecda vi\u1ec7c thi\u1ebft k\u1ebf m\u1ed9t b\u1ed9 t\u00edch l\u0169y \u0111\u1ec3 duy tr\u00ec \u00e1p su\u1ea5t h\u1ec7 th\u1ed1ng khi kh\u00f4ng t\u1ea3i m\u1ea1ch, - ph\u1ea3i l\u00e0m cho th\u00e0nh ph\u1ea7n thi\u1ebft k\u1ebf m\u1ea1ch th\u1ee7y l\u1ef1c h\u1ee3p l\u00fd. Khi ph\u00f4i \u0111\u01b0\u1ee3c \u0111\u1ed5 \u0111\u1ea7y d\u1ea7u, ph\u00f4i th\u01b0\u1eddng l\u1ecfng ho\u1eb7c th\u1eadm ch\u00ed r\u01a1i ra, khi \u0111\u00f3 c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng h\u1ec7 th\u1ed1ng nh\u01b0 h\u00ecnh 1-13 (b), van \u0111\u1ea3o chi\u1ec1u b\u1eb1ng tay \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf v\u1ecb tr\u00ed b\u00ean tr\u00e1i, b\u01a1m c\u1ea5p d\u1ea7u. t\u1edbi b\u1ed9 t\u00edch \u0111i\u1ec7n v\u00e0 xi lanh th\u1ee7y l\u1ef1c, v\u00e0 \u0111\u1ea9y p\u00edt-t\u00f4ng sang ph\u1ea3i. Khi ti\u1ebfp x\u00fac v\u1edbi ph\u00f4i, \u00e1p su\u1ea5t h\u1ec7 th\u1ed1ng t\u0103ng l\u00ean cho \u0111\u1ebfn khi r\u01a1 le \u00e1p su\u1ea5t g\u1eedi t\u00edn hi\u1ec7u c\u1ea5p \u0111i\u1ec7n cho van \u0111i\u1ec7n t\u1eeb 2 v\u00e0 kh\u00f4ng t\u1ea3i m\u00e1y b\u01a1m qua van 3, b\u1ed9 t\u00edch \u00e1p duy tr\u00ec \u00e1p su\u1ea5t h\u1ec7 th\u1ed1ng v\u00e0 b\u1ed5 sung r\u00f2 r\u1ec9 h\u1ec7 th\u1ed1ng. Khi \u00e1p su\u1ea5t gi\u1ea3m \u0111\u1ebfn gi\u1edbi h\u1ea1n d\u01b0\u1edbi c\u1ee7a r\u01a1 le \u00e1p su\u1ea5t, r\u01a1 le ng\u1eaft \u0111i\u1ec7n cho van \u0111i\u1ec7n t\u1eeb v\u00e0 b\u01a1m th\u1ee7y l\u1ef1c ti\u1ebfp t\u1ee5c cung c\u1ea5p d\u1ea7u cho h\u1ec7 th\u1ed1ng v\u00e0 b\u1ed9 t\u00edch \u00e1p. V\u00ed d\u1ee5 n\u00e0y cho th\u1ea5y khi thi\u1ebft k\u1ebf m\u1ea1ch kh\u00f4ng t\u1ea3i c\u00f3 b\u1ed9 t\u00edch \u00e1p \u0111\u1ec3 duy tr\u00ec \u00e1p su\u1ea5t h\u1ec7 th\u1ed1ng, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i l\u00e0m cho thi\u1ebft k\u1ebf m\u1ea1ch th\u1ee7y l\u1ef1c h\u1ee3p l\u00fd.<\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

1-13 H\u1ec7 th\u1ed1ng th\u1ee7y l\u1ef1c k\u1eb9p ph\u00f4i<\/p>\n\n\n\n

M\u1ed9t. h\u1ec7 th\u1ed1ng th\u1ee7y l\u1ef1c \u0111\u1ec3 k\u1eb9p ph\u00f4i tr\u00ean m\u00e1y c\u00f4ng c\u1ee5 Van 1 d\u00e3y 2 van th\u1ee7y \u0111\u1ed9ng van 3 x\u1ea3<\/p>\n\n\n\n

NS. H\u1ec7 th\u1ed1ng th\u1ee7y l\u1ef1c \u0111\u01b0\u1ee3c c\u1ea3i ti\u1ebfn \u0111\u1ec3 k\u1eb9p ph\u00f4i tr\u00ean m\u00e1y c\u00f4ng c\u1ee5<\/p>\n\n\n\n

1-r\u01a1le \u00e1p su\u1ea5t 2-van \u0111i\u1ec7n t\u1eeb 3-van x\u1ea3<\/p>\n\n\n\n

2. M\u1ea1ch d\u1ee1 t\u1ea3i van hai chi\u1ec1u hai v\u1ecb tr\u00ed k\u00e9m.<\/strong><\/strong><\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

1-14 M\u1edf m\u1ea1ch b\u1eb1ng van hai chi\u1ec1u hai v\u1ecb tr\u00ed<\/p>\n\n\n\n

1 - b\u01a1m th\u1ee7y l\u1ef1c 2 - van \u0111i\u1ec7n t\u1eeb hai chi\u1ec1u hai v\u1ecb tr\u00ed<\/p>\n\n\n\n

3 - van x\u1ea3<\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

1-15 M\u1ea1ch d\u1ee1 t\u1ea3i s\u1eed d\u1ee5ng van hai chi\u1ec1u hai v\u1ecb tr\u00ed nh\u1ecf \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n van x\u1ea3 v\u1eadn h\u00e0nh b\u1eb1ng th\u00ed \u0111i\u1ec3m<\/p>\n\n\n\n

1-b\u01a1m th\u1ee7y l\u1ef1c 2 van x\u1ea3<\/p>\n\n\n\n

Van \u0111i\u1ec7n t\u1eeb 3 hai v\u1ecb tr\u00ed, hai chi\u1ec1u<\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

1-16 M\u1ea1ch x\u1ea3 v\u1edbi van x\u1ea3 \u0111i\u1ec1u khi\u1ec3n b\u00ean ngo\u00e0i<\/strong><\/p>\n\n\n\n

H\u00ecnh 1-14 m\u00f4 t\u1ea3 m\u1ea1ch kh\u00f4ng t\u1ea3i s\u1eed d\u1ee5ng van hai chi\u1ec1u hai v\u1ecb tr\u00ed. B\u01a1m th\u1ee7y l\u1ef1c l\u00e0 lo\u1ea1i b\u01a1m \u0111\u1ecbnh l\u01b0\u1ee3ng cao \u00e1p, l\u01b0u l\u01b0\u1ee3ng l\u1edbn, \u0111\u1ea7u ra c\u1ee7a b\u01a1m \u0111\u01b0\u1ee3c n\u1ed1i v\u1edbi van \u0111i\u1ec7n t\u1eeb hai v\u1ecb tr\u00ed hai chi\u1ec1u khi h\u1ec7 th\u1ed1ng l\u00e0m vi\u1ec7c, van hai chi\u1ec1u hai v\u1ecb tr\u00ed \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n, \u0111\u00f3ng c\u1eaft \u0111\u1ea7u ra c\u1ee7a b\u01a1m th\u1ee7y l\u1ef1c \u0111\u1ebfn k\u00eanh b\u1ed3n ch\u1ee9a, b\u01a1m th\u1ee7y l\u1ef1c \u0111\u1ea7u ra \u00e1p su\u1ea5t d\u1ea7u v\u00e0o h\u1ec7 th\u1ed1ng, b\u1ed9 ph\u1eadn truy\u1ec1n \u0111\u1ed9ng b\u1eaft \u0111\u1ea7u ho\u1ea1t \u0111\u1ed9ng. Khi ph\u1ea7n t\u1eed truy\u1ec1n \u0111\u1ed9ng ng\u1eebng ho\u1ea1t \u0111\u1ed9ng, b\u1ed9 \u0111i\u1ec7n t\u1eeb \u0111\u01b0\u1ee3c kh\u1eed n\u0103ng l\u01b0\u1ee3ng v\u00e0 \u0111\u1ea7u ra d\u1ea7u t\u1eeb b\u01a1m \u0111\u01b0\u1ee3c d\u1eabn \u0111\u1ebfn b\u1ed3n ch\u1ee9a th\u00f4ng qua van hai chi\u1ec1u hai v\u1ecb tr\u00ed \u0111\u1ec3 kh\u00f4ng t\u1ea3i h\u1ec7 th\u1ed1ng. Tuy nhi\u00ean, ng\u01b0\u1eddi ta th\u1ea5y r\u1eb1ng khi van hai chi\u1ec1u hai v\u1ecb tr\u00ed b\u1ecb kh\u1eed \u0111i\u1ec7n, h\u1ec7 th\u1ed1ng kh\u00f4ng th\u1ec3 ho\u00e0n to\u00e0n kh\u00f4ng t\u1ea3i \u0111\u01b0\u1ee3c v\u00e0 g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng n\u00f3ng h\u1ec7 th\u1ed1ng.<\/p>\n\n\n\n

Nguy\u00ean nh\u00e2n d\u1eabn \u0111\u1ebfn h\u1ec7 th\u1ed1ng kh\u00f4ng t\u1ea3i h\u1ebft l\u00e0 do th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a van hai chi\u1ec1u hai v\u1ecb tr\u00ed kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi l\u01b0u l\u01b0\u1ee3ng \u0111\u1ea7u ra c\u1ee7a b\u01a1m th\u1ee7y l\u1ef1c. N\u00f3i chung, t\u1ed1c \u0111\u1ed9 d\u00f2ng ch\u1ea3y qua van hai v\u1ecb tr\u00ed hai chi\u1ec1u ph\u1ea3i b\u1eb1ng t\u1ed1c \u0111\u1ed9 d\u00f2ng ch\u1ea3y \u0111\u1ea7u ra c\u1ee7a b\u01a1m th\u1ee7y l\u1ef1c khi kh\u00f4ng t\u1ea3i v\u00e0 kh\u00f4ng nh\u1ecf h\u01a1n t\u1ed1c \u0111\u1ed9 d\u00f2ng ch\u1ea3y \u0111\u1ea7u ra c\u1ee7a b\u01a1m th\u1ee7y l\u1ef1c. N\u1ebfu th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt van hai chi\u1ec1u hai v\u1ecb tr\u00ed kh\u00f4ng th\u1ec3 b\u01a1m th\u1ee7y l\u1ef1c \u0111\u1ea7u ra ch\u1ea3y h\u1ebft v\u1ec1 b\u1ed3n ch\u1ee9a, ch\u1eafc ch\u1eafn s\u1ebd l\u00e0m cho \u00e1p su\u1ea5t \u0111\u1ea7u ra c\u1ee7a b\u01a1m t\u0103ng l\u00ean, th\u00f4ng qua van hai v\u1ecb tr\u00ed hai chi\u1ec1u ch\u00eanh l\u1ec7ch \u00e1p su\u1ea5t th\u1ee7y l\u1ef1c t\u0103ng l\u00ean, do \u0111\u00f3 hai - V\u1ecb tr\u00ed van hai chi\u1ec1u ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t van ti\u1ebft l\u01b0u, do \u0111\u00f3, b\u01a1m th\u1ee7y l\u1ef1c kh\u00f4ng th\u1ec3 ho\u00e0n to\u00e0n kh\u00f4ng t\u1ea3i, v\u00e0 l\u00e0m cho h\u1ec7 th\u1ed1ng n\u00f3ng l\u00ean.<\/p>\n\n\n\n

V\u00ed d\u1ee5 n\u00e0y cho th\u1ea5y r\u1eb1ng m\u1ea1ch kh\u00f4ng t\u1ea3i nh\u01b0 v\u1eady ch\u1ec9 th\u00edch h\u1ee3p cho c\u00e1c h\u1ec7 th\u1ed1ng th\u1ee7y l\u1ef1c c\u00f3 t\u1ed1c \u0111\u1ed9 d\u00f2ng ch\u1ea3y nh\u1ecf, t\u1ee9c l\u00e0 th\u01b0\u1eddng cho c\u00e1c m\u00e1y b\u01a1m th\u1ee7y l\u1ef1c c\u00f3 t\u1ed1c \u0111\u1ed9 d\u00f2ng ch\u1ea3y nh\u1ecf h\u01a1n 63L \/ ph\u00fat. C\u00e1c h\u1ec7 th\u1ed1ng \u00e1p su\u1ea5t cao v\u00e0 l\u01b0u l\u01b0\u1ee3ng l\u1edbn n\u00ean s\u1eed d\u1ee5ng c\u00e1c d\u1ea1ng m\u1ea1ch kh\u00f4ng t\u1ea3i kh\u00e1c, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u1ea1ch kh\u00f4ng t\u1ea3i \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n trong H\u00ecnh 1-15, s\u1eed d\u1ee5ng m\u1ed9t van hai chi\u1ec1u hai v\u1ecb tr\u00ed nh\u1ecf \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n van x\u1ea3 v\u1eadn h\u00e0nh b\u1eb1ng pilot.<\/p>\n\n\n\n

Khi van \u0111i\u1ec7n t\u1eeb hai v\u1ecb tr\u00ed hai chi\u1ec1u 3 \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n, c\u1ed5ng \u0111i\u1ec1u khi\u1ec3n t\u1eeb xa c\u1ee7a van x\u1ea3 2 d\u1eabn \u0111\u1ebfn b\u1ed3n ch\u1ee9a v\u00e0 d\u1ea7u c\u00f3 \u00e1p su\u1ea5t \u0111\u1ea7u ra t\u1eeb b\u01a1m th\u1ee7y l\u1ef1c 1 s\u1ebd m\u1edf van x\u1ea3 2 \u1edf \u00e1p su\u1ea5t r\u1ea5t th\u1ea5p v\u00e0 t\u1ea5t c\u1ea3 \u0111\u1ec1u ch\u1ea3y ng\u01b0\u1ee3c tr\u1edf l\u1ea1i. v\u00e0o b\u1ec3 \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c d\u1ee1 h\u00e0ng. K\u00edch th\u01b0\u1edbc c\u1ee7a \u00e1p su\u1ea5t kh\u00f4ng t\u1ea3i ph\u1ee5 thu\u1ed9c v\u00e0o \u0111\u1ed9 b\u1ec1n c\u1ee7a l\u00f2 xo van ch\u00ednh c\u1ee7a van gi\u1ea3m \u00e1p v\u00e0 n\u00f3i chung l\u00e0 0,2 \u0111\u1ebfn 0,4 MPa. van 3 ch\u1ec9 c\u1ea7n \u0111i\u1ec1u khi\u1ec3n d\u1ea7u ch\u1ea3y ra kh\u1ecfi m\u1ea1ch d\u1ea7u qua van x\u1ea3 2, do \u0111\u00f3 cho ph\u00e9p s\u1eed d\u1ee5ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a van nh\u1ecf h\u01a1n v\u00e0 cho ph\u00e9p \u0111i\u1ec1u khi\u1ec3n t\u1eeb xa. Khi ng\u1eaft k\u1ebft n\u1ed1i van \u0111i\u1ec7n t\u1eeb, m\u1ea1ch kh\u00f4ng t\u1ea3i n\u00e0y c\u0169ng c\u00f3 m\u1ed9t qu\u00e1 tr\u00ecnh t\u0103ng d\u1ed1c v\u1eeba ph\u1ea3i h\u01a1n nhi\u1ec1u so v\u1edbi m\u1ea1ch trong H\u00ecnh 1-14.<\/p>\n\n\n\n

Tuy nhi\u00ean, khi van 3 \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi c\u1ed5ng \u0111i\u1ec1u khi\u1ec3n t\u1eeb xa c\u1ee7a van 2, th\u1ec3 t\u00edch c\u1ee7a bu\u1ed3ng \u0111i\u1ec1u khi\u1ec3n c\u1ee7a van 2 t\u0103ng l\u00ean, c\u00f3 th\u1ec3 t\u1ea1o ra s\u1ef1 kh\u00f4ng \u1ed5n \u0111\u1ecbnh trong c\u00f4ng vi\u1ec7c v\u00e0 v\u00ec l\u00fd do n\u00e0y, m\u1ed9t thi\u1ebft b\u1ecb gi\u1ea3m ch\u1ea5n th\u01b0\u1eddng \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp tr\u00ean k\u1ebft n\u1ed1i. m\u1ea1ch d\u1ea7u. M\u1ea1ch kh\u00f4ng t\u1ea3i s\u1eed d\u1ee5ng van x\u1ea3 \u0111i\u1ec1u khi\u1ec3n b\u00ean ngo\u00e0i c\u0169ng thu\u1ed9c lo\u1ea1i n\u00e0y, nh\u01b0 trong H\u00ecnh 1-16. N\u00f3 d\u1ee1 b\u01a1m th\u1ee7y l\u1ef1c v\u00e0 \u0111\u1ed3ng th\u1eddi \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c xi lanh th\u1ee7y l\u1ef1c \u0111\u01b0\u1ee3c c\u1ea5p li\u1ec7u nhanh ch\u00f3ng v\u00e0 c\u00f4ng vi\u1ec7c \u0111\u01b0\u1ee3c c\u1ea5p li\u1ec7u tu\u1ea7n t\u1ef1. N\u00f3i chung, m\u1ea1ch kh\u00f4ng t\u1ea3i c\u1ea7n l\u00e0m cho \u00e1p su\u1ea5t kh\u00f4ng t\u1ea3i c\u00e0ng th\u1ea5p c\u00e0ng t\u1ed1t (v\u00ec l\u00fd do n\u00e0y, c\u00e1c th\u00e0nh ph\u1ea7n trong m\u1ea1ch c\u00e0ng \u00edt c\u00e0ng t\u1ed1t, \u0111\u01b0\u1eddng \u1ed1ng d\u1eabn c\u0169ng ph\u1ea3i ng\u1eafn nh\u1ea5t c\u00f3 th\u1ec3), nh\u01b0ng c\u0169ng ph\u1ea3i l\u00e0m cho h\u1ec7 th\u1ed1ng \u1edf tr\u1ea1ng th\u00e1i l\u00e0m vi\u1ec7c v\u00e0 tr\u1ea1ng th\u00e1i kh\u00f4ng t\u1ea3i khi chuy\u1ec3n \u0111\u1ed5i qua l\u1ea1i cho nhau c\u00e0ng \u00eam c\u00e0ng t\u1ed1t, va \u0111\u1eadp nh\u1ecf, ti\u1ebfng \u1ed3n th\u1ea5p.<\/p>\n\n\n\n

3. V\u1ea5n \u0111\u1ec1 d\u1ee1 h\u00e0ng kh\u00f4ng \u0111\u1ea7y \u0111\u1ee7<\/strong><\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

1-17 M\u1ea1ch d\u1ee1 b\u01a1m d\u1ea7u c\u00f3 duy tr\u00ec \u00e1p su\u1ea5t b\u1ed9 t\u00edch l\u0169y<\/p>\n\n\n\n

1-b\u01a1m thu\u1ef7 l\u1ef1c 2-van tu\u1ea7n t\u1ef1 thu\u1ef7 l\u1ef1c 3-van m\u1ed9t chi\u1ec1u 4-t\u00edch-l\u0169y 5 van x\u1ea3 6-hai v\u1ecb tr\u00ed, hai chi\u1ec1u, van \u0111\u1ecbnh h\u01b0\u1edbng ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng ch\u1ea5t l\u1ecfng<\/p>\n\n\n\n

Nh\u01b0 trong H\u00ecnh 1-17 (a), khi \u00e1p su\u1ea5t c\u1ee7a b\u1ed9 t\u00edch l\u0169y 4 t\u0103ng l\u00ean \u0111\u1ebfn \u00e1p su\u1ea5t \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp b\u1edfi van kh\u00f4ng t\u1ea3i (van tu\u1ea7n t\u1ef1 \u0111i\u1ec1u khi\u1ec3n ch\u1ea5t l\u1ecfng) 2, van 2 m\u1edf, b\u01a1m th\u1ee7y l\u1ef1c 1 kh\u00f4ng t\u1ea3i, van m\u1ed9t chi\u1ec1u 3 \u0111\u00f3ng, v\u00e0 h\u1ec7 th\u1ed1ng duy tr\u00ec \u00e1p su\u1ea5t (duy tr\u00ec \u00e1p su\u1ea5t); Khi \u00e1p su\u1ea5t c\u1ee7a h\u1ec7 th\u1ed1ng th\u1ea5p h\u01a1n \u00e1p su\u1ea5t do van 2 \u0111\u1eb7t, van 2 \u0111\u00f3ng l\u1ea1i v\u00e0 b\u01a1m 1 c\u1ea5p l\u1ea1i d\u1ea7u c\u00f3 \u00e1p cho h\u1ec7 th\u1ed1ng. L\u00fac n\u00e0y van x\u1ea3 5 \u0111\u00f3ng vai tr\u00f2 l\u00e0 van an to\u00e0n. L\u1ed7i ch\u00ednh c\u1ee7a m\u1ea1ch n\u00e0y l\u00e0 kh\u00f4ng t\u1ea3i xong b\u1ecb m\u1ea5t ngu\u1ed3n.<\/p>\n\n\n\n

Nguy\u00ean nh\u00e2n c\u1ee7a s\u1ef1 c\u1ed1 n\u00e0y: khi \u00e1p su\u1ea5t t\u0103ng, van tu\u1ea7n t\u1ef1 2 \u0111i\u1ec1u khi\u1ec3n b\u1eb1ng ch\u1ea5t l\u1ecfng ch\u1ec9 m\u1edf m\u1ed9t ph\u1ea7n c\u0169ng nh\u01b0 van x\u1ea3 \u0111\u1ec3 b\u01a1m th\u1ee7y l\u1ef1c 1 kh\u00f4ng t\u1ea3i n\u00ean g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng m\u1ea5t c\u00f4ng su\u1ea5t.<\/p>\n\n\n\n

Dung d\u1ecbch<\/strong>:<\/p>\n\n\n\n

\u0110\u1ea7u ti\u00ean, S\u1eed d\u1ee5ng van th\u1ee9 t\u1ef1 th\u1ee7y l\u1ef1c nh\u1ecf 2 l\u00e0m van \u0111i\u1ec1u khi\u1ec3n \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9 m\u1edf c\u1ee7a van x\u1ea3 ch\u00ednh 5, nh\u01b0 trong H\u00ecnh 1-17 (b), \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng van 5 m\u1edf ho\u00e0n to\u00e0n khi kh\u00f4ng t\u1ea3i.<\/p>\n\n\n\n

Th\u1ee9 hai, m\u1ea1ch \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb trong H\u00ecnh 1-17 (c) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 m\u1edf van \u0111\u1ea3o chi\u1ec1u ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng ch\u1ea5t l\u1ecfng hai v\u1ecb tr\u00ed ba chi\u1ec1u 2 tr\u01b0\u1edbc ti\u00ean v\u1edbi \u00e1p su\u1ea5t c\u1ee7a b\u1ed9 t\u00edch l\u0169y (h\u1ec7 th\u1ed1ng), sau \u0111\u00f3 \u0111\u1ec3 t\u1ea1o ra hai v\u1ecb tr\u00ed van \u0111\u1ea3o chi\u1ec1u ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng ch\u1ea5t l\u1ecfng hai chi\u1ec1u 6 m\u1edf ho\u00e0n to\u00e0n, do \u0111\u00f3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng van x\u1ea3 ch\u00ednh 5 m\u1edf ho\u00e0n to\u00e0n, do \u0111\u00f3 cho ph\u00e9p b\u01a1m 1 kh\u00f4ng t\u1ea3i ho\u00e0n to\u00e0n.<\/p>\n\n\n\n

4. B\u1ed1c d\u1ee1 s\u1ef1 b\u1ea5t \u1ed5n \u0111\u1ecbnh<\/strong><\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

1-18 D\u1ee1 m\u1ea1ch v\u1edbi r\u01a1 le \u00e1p su\u1ea5t v\u00e0 van x\u1ea3 \u0111i\u1ec7n t\u1eeb<\/p>\n\n\n\n

1-b\u01a1m th\u1ee7y l\u1ef1c 2-van m\u1ed9t chi\u1ec1u 3,3\u2032- R\u01a1le \u00e1p su\u1ea5t 4-\u1eafc quy 5-van gi\u1ea3m \u00e1p \u0111i\u1ec7n t\u1eeb<\/p>\n\n\n\n

M\u1ea1ch t\u00edch l\u0169y tr\u00ean h\u00ecnh 1-18 s\u1eed d\u1ee5ng r\u01a1le \u00e1p su\u1ea5t 3 \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n vi\u1ec7c kh\u00f4ng t\u1ea3i ho\u1eb7c l\u00e0m vi\u1ec7c c\u1ee7a b\u01a1m d\u1ea7u. L\u1ed7i ch\u00ednh x\u1ea3y ra \u1edf m\u1ea1ch n\u00e0y l\u00e0 \u00e1p su\u1ea5t h\u1ec7 th\u1ed1ng dao \u0111\u1ed9ng qua l\u1ea1i xung quanh gi\u00e1 tr\u1ecb \u00e1p su\u1ea5t quy \u0111\u1ecbnh c\u1ee7a r\u01a1 le \u00e1p su\u1ea5t 3 (kho\u1ea3ng h\u1ed3i) v\u00e0 b\u01a1m d\u1ea7u th\u01b0\u1eddng xuy\u00ean xu\u1ea5t hi\u1ec7n, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m tu\u1ed5i th\u1ecd c\u1ee7a b\u01a1m d\u1ea7u r\u1ea5t nhi\u1ec1u.<\/p>\n\n\n\n

Gi\u1ea3i ph\u00e1p l\u00e0 s\u1eed d\u1ee5ng b\u1ed9 \u0111i\u1ec1u khi\u1ec3n ch\u00eanh l\u1ec7ch \u00e1p su\u1ea5t v\u1edbi r\u01a1 le \u00e1p su\u1ea5t k\u00e9p nh\u01b0 h\u00ecnh 1-18 (b). C\u00e1c r\u01a1 le \u00e1p su\u1ea5t 3 v\u00e0 3 \u2032 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh theo c\u00e1c gi\u00e1 tr\u1ecb \u0111i\u1ec1u ch\u1ec9nh \u00e1p su\u1ea5t cao v\u00e0 th\u1ea5p, vi\u1ec7c d\u1ee1 t\u1ea3i c\u1ee7a b\u01a1m d\u1ea7u \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n b\u1edfi gi\u00e1 tr\u1ecb \u0111i\u1ec1u ch\u1ec9nh \u00e1p su\u1ea5t cao, trong khi qu\u00e1 tr\u00ecnh l\u00e0m vi\u1ec7c l\u1ea1i c\u1ee7a b\u01a1m d\u1ea7u \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n b\u1edfi m\u1ee9c th\u1ea5p gi\u00e1 tr\u1ecb \u0111i\u1ec1u ch\u1ec9nh \u00e1p su\u1ea5t \u0111\u1ec3 khi b\u01a1m d\u1ea7u kh\u00f4ng t\u1ea3i, \u1eafc quy ti\u1ebfp t\u1ee5c x\u1ea3 d\u1ea7u cho \u0111\u1ebfn khi \u00e1p su\u1ea5t gi\u1ea3m d\u1ea7n xu\u1ed1ng d\u01b0\u1edbi gi\u00e1 tr\u1ecb \u0111i\u1ec1u ch\u1ec9nh \u00e1p su\u1ea5t th\u1ea5p khi b\u01a1m d\u1ea7u l\u00e0m vi\u1ec7c tr\u1edf l\u1ea1i. C\u00f3 m\u1ed9t kho\u1ea3ng th\u1eddi gian \u1edf gi\u1eefa, do \u0111\u00f3 tr\u00e1nh \u0111\u01b0\u1ee3c hi\u1ec7n t\u01b0\u1ee3ng chuy\u1ec3n \u0111\u1ed5i th\u01b0\u1eddng xuy\u00ean.<\/p>","protected":false},"excerpt":{"rendered":"

M\u1ea1ch kh\u00f4ng t\u1ea3i l\u00e0 khi m\u1ea1ch kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng d\u1eabn \u0111\u1ebfn vi\u1ec7c b\u01a1m d\u1ea7u ch\u1ea1y kh\u00f4ng t\u1ea3i. \u01afu \u0111i\u1ec3m l\u00e0 tu\u1ed5i th\u1ecd m\u00e1y b\u01a1m d\u00e0i h\u01a1n, gi\u1ea3m ti\u00eau th\u1ee5 \u0111i\u1ec7n n\u0103ng, gi\u1ea3m sinh nhi\u1ec7t h\u1ec7 th\u1ed1ng, t\u0103ng hi\u1ec7u su\u1ea5t v\u00e0 v\u1eadn h\u00e0nh an to\u00e0n<\/p>","protected":false},"author":1,"featured_media":2246,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[1],"tags":[233,691,690],"class_list":["post-2210","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hydraulic-press","tag-hydraulic-press-machine","tag-unloading-circuits","tag-unloading-valve"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/avido.cn\/wp-content\/uploads\/2021\/04\/\u56fe\u72471-4.png","_links":{"self":[{"href":"https:\/\/avido.cn\/vi\/wp-json\/wp\/v2\/posts\/2210","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/avido.cn\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/avido.cn\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/avido.cn\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/avido.cn\/vi\/wp-json\/wp\/v2\/comments?post=2210"}],"version-history":[{"count":0,"href":"https:\/\/avido.cn\/vi\/wp-json\/wp\/v2\/posts\/2210\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/avido.cn\/vi\/wp-json\/wp\/v2\/media\/2246"}],"wp:attachment":[{"href":"https:\/\/avido.cn\/vi\/wp-json\/wp\/v2\/media?parent=2210"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/avido.cn\/vi\/wp-json\/wp\/v2\/categories?post=2210"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/avido.cn\/vi\/wp-json\/wp\/v2\/tags?post=2210"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}