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  Shut-off pressure ȤÀº Suction pressure °ü·Ã Áú¹®
  ±Û¾´ÀÌ : È­°ø¾ÈÀüȯ¡¦   °íÀ¯ID : hiano     ³¯Â¥ : 23-04-28 11:46     Á¶È¸ : 3137    
   image-8.jpg (42.1K), Down : 5, 2023-04-28 11:47:13
°¨»çÇÕ´Ï´Ù ½ºÅ×Æijë´Ô... Ãß°¡ÀûÀ¸·Î ´õ Áú¹®Çصµ µÉ±î¿ä... °è¼ÓÇؼ­ Áú¹®µå·Á¼­ Á˼ÛÇÕ´Ï´Ù ¤Ì¤Ð¤Ð¤Ð
À̹ÌÁö ÆÄÀÏÀ» ÷ºÎÇØ¾ß Çؼ­ »õ·Î ÀÛ¼ºÇÏ´Â Á¡ ¾çÇØ ºÎŹµå¸³´Ï´Ù ¤Ð¤Ð¤Ð
B1) 
Differential Head  ¶Ç´Â Differential Pressure ´Â ÆßÇÁ ÀüÈÄÀÇ Head Â÷ ¶Ç´Â ÀüÈÄ ¾Ð·ÂÂ÷¸¦ ¸»ÇÑ´Ù°í Çϼ̽À´Ï´Ù.
Àü¾çÁ¤(Total head)´Â ÅäÃâ¾çÁ¤, ÈíÀÔ¾çÁ¤, ¼Õ½Ç¾çÁ¤ÀÇ ÇÕÀÌ°í, ½Ç¾çÁ¤(Actual head)´Â ÅäÃâ¾çÁ¤, ÈíÀÔ¾çÁ¤ÀÇ ÇÕÀ¸·Î ¾Ë°íÀÖ½À´Ï´Ù.
±×·¸´Ù¸é Differential Head  ¶Ç´Â Differential Pressures´Â Àü¾çÁ¤¿¡ ´ëÇÑ °ªÀΰ¡¿ä ½Ç¾çÁ¤¿¡ ´ëÇÑ °ªÀΰ¡¿ä?
B2)
Ht= total head
Hf=friction head
Hd=discharge static head
Hs=suction static head
¶ó Çϸé,
- ÈíÀÔÃøÀÇ ¼öÀ§°¡ ÆßÇÁº¸´Ù ³ôÀº °æ¿ìÀÇ Á¤»ó¾çÁ¤(Rated differential Head)
HT  =  Hf + HD - HS
-ÈíÀÔ ÃøÀÇ ¼öÀ§°¡ ÆßÇÁº¸´Ù ³·Àº °æ¿ìÀÇ Á¤»ó¾çÁ¤(Rated differential Head)
HT  =  Hf + HD + HS
ÀÌ°æ¿ì°¡ ¸Â³ª¿ä?
B3)
ÀÌÀü¿¡ ´äº¯ÇØÁֽŠ³»¿ë AA4)¿¡ ÀÇÇϸé
(1)~(3)¿¡ ÇØ´çÇÏ´Â ¾Ð·ÂÀ» ¸ðµÎ °í·ÁÇÑ Pump Shut-off Pressure¸¦ ¼³°è¾Ð·ÂÀ¸·Î Ç϶ó´Â °ÍÀÌ °¡À̵åÁöħ ³»¿ëÀ̶ó°í Çϼ̽À´Ï´Ù.
±×·¯¸é Ãß°¡ÀûÀ¸·Î ±»ÀÌ (1)~(3)¿¡ ÇØ´çÇÏ´Â ¾Ð·ÂÀ» ¸ðµÎ °í·ÁÇÑ Pump Shut-off Pressure º¸´Ù ´õ ³ô°Ô ¼³°è¾Ð·ÂÀ» Àâ¾Æ¾ßÇÒ ÇÊ¿ä´Â ¾ø´Â °ÍÀÎÁö¿ä?
B4)
÷ºÎµÈ À̹ÌÁö ¿Í ºñ½ÁÇÏ°Ô

1. ÆßÇÁ°¡ ¾×¸é º¸´Ù ³·Àº °æ¿ì

2. suction drumÀÌ ÆßÇÁº¸´Ù ³ôÀº Áö¿ª(¾ð´ö µî)¿¡ ¼³Ä¡ µÇ¾î ÀÖ´Â °æ¿ì
ÇØ´çÇÏ´Â °æ¿ì suction pressure¸¦ ¾î¶»°Ô »êÁ¤ÇؾßÇÒÁö ±Ã±ÝÇÕ´Ï´Ù.
ȯ°æ¾ÈÀüÂÊ ÀÏÇÏ´Ù°¡ ¿£Áö´Ï¾î¸µ °ü·Ã ÀÚ·á ãÀ¸·Á´Ï ³Ê¹« ¾î·Æ³×¿ä..

½ºÅ×Æijë Stefano   23-04-29 01:24
(AB1)  PumpÀÇ Differential Pressure(kgf/cm2 )´Â  Pump ÀüÈÄÀÇ ¾Ð·ÂÂ÷¸¦ ¸»ÇÕ´Ï´Ù. 
ÆßÇÁ ÀüÈÄÀÇ ¾Ð·ÂÂ÷´Â Àý´ë¾Ð·ÂÀ¸·Î ÇϵçÁö °è±â¾Ð·ÂÀ¸·Î ÇϵçÁö ¸¶Âù°¡Áö·Î °°Àº Â÷¾Ð°ªÀ» ³ªÅ¸³À´Ï´Ù. °¢ Pressure(kgf/cm2 g) ´ÜÀ§¸¦ Head ´ÜÀ§(m) ·Î ³ªÅ¸³»·Á¸é ¹Ðµµ¿Í Á߷°¡¼Óµµ·Î ³ª´©¸é µË´Ï´Ù. 

Differential Pressure of Pump,  kgf/cm =  (Discharge Pressure kgf/cm2 g or a) - (Suction Pressure, kgf/cm2 g or a) = ¥ÄPpump
Differential Head of Pump, m-H  = (Pump Discharge Head, m) - (Pump Suction Head, m) = ¥ÄPpump 

¥ÄPpump, kgf/cm2 = ¥ÄPpump,kgf/cm2 /

(AB2) PumpÀÇ ÈíÀÔÃø ȤÀº ¹èÃâÃøÀÇ "Head" ¶ó°íÇÏ¸é  Pressure Head (ÈíÀԵ巳¿¡ ¾Ð·ÂÀÌ °É¸°°æ¿ì +°ª, Áø°øÀÌ °É¸°°æ¿ì -°ª), Static Head (ÈíÀԵ巳 ¾×¸é°ú ÆßÇÁ°£ »ó´ëÀû ³ôÀÌ,  ÆßÇÁº¸´Ù ³ôÀǸé +°ª,  ÆßÇÁº¸´Ù ³·À¸¸é -°ª),  Friction Head (À¯Ã¼°¡ Èê·¯°¥ °æ¿ì ÈíÀÔÃø ¸¶Âû¼Õ½ÇÀº,  -°ª, ¹èÃâÃø ¸¶Âû¼Õ½ÇÀº +°ª),  Velocity Head(¾×¸é ¶Ç´Â ¹èÃⱸ¿¡¼­ Velocity°¡ ÀÖ´Ù¸é v2/2g   

ÆßÇÁ°¡ ÇÊ¿äÇÑ Differential Head´Â Total Dynamic Head(TDH)¶ó°í ÈçÈ÷ ºÎ¸£´Âµ¥ ÀÌ°ªÀº  Discharge Head¿¡¼­ Suction Head °ªÀ» »« °ªÀ¸·Î °è»êµÇ¸ç  À̸¦ ¾Ð·ÂÀ¸·Î °íÄ¡·Á¸é ¹Ðµµ¿Í Á߷°¡¼Óµµ¸¦ °öÇØÁÖ¸é µË´Ï´Ù.

PumpÀÇ Differential Head  = Press Head (Hp,dis - Hp,suc) + Static Head (Hs,dis - Hs,suc) +Friction Head (Hf,dis + Hf,suc) + Velocity Head (Hv,dis - Hv,suc) 

Áú¹®ÀÇ B1, B2ÁÖÁ¦ÀÇ  À̾߱â´Â  ÆßÇÁ¿¡ ÇÊ¿äÇÑ Â÷¾Ð(¶Ç´Â Diff. Head)³ª µ¿·ÂÀ» °è»êÇϱâ À§ÇØ ÇÊ¿äÇÑ Á¤º¸µé¿¡ ÇØ´çÇÕ´Ï´Ù.

(AB3)  Pump Shut-off Pressure´Â  Pump°¡ ¼³Ä¡µÇ¾î ¿¬°áµÈ ¹è°ü°ú ±â±âÀåü¿Í ÇÔ²² ¿îÀüµÇ°í ÀÖÀ» ¶§  ¾×È帧 ¹è°ü°ú ±â±âÀåÄ¡ÀÇ ÃÖÁ¾ ÃⱸÃø ¹ëºê°¡ ´ÝÇûÀ» ¶§ °É¸± ¼ö ÀÖ´Â ÃÖ´ëÀÇ ¾Ð·ÂÀ» ¸»Çϴµ¥  ÀÌ´Â ÆßÇÁµ¿·Â°è»ê¿¡ ÇÊ¿äÇÑ Á¤º¸°¡ ¾Æ´Ï°í  ¹è°üÀ̳ª ±â±âÀÇ ¼³°è¾Ð·ÂÀ» Á¡°ËÇϴµ¥ »ç¿ëÇÏ´Â µ¥ÀÌÅÍÀ̹ǷΠÀÌÀüÀÇ ÆßÇÁ¸¸À» ¼±Á¤Çϴµ¥ ÇÊ¿äÇÑ ÀÚ·á¿Í´Â ¾²ÀÓ»õ°¡ ´Ù¸¨´Ï´Ù.

Pump Shut-off Pressure´Â  À¯Ã¼°¡ È帣°í ÀÖÁö ¾ÊÀ» ¶§ÀÇ ¾Ð·Â¿¡ ÇØ´çÇϹǷΠFriction Loss µîÀº ÇÊ¿äÇÏÁö ¾Ê°í ´ÜÁö ÈíÀÔÃø°ú ¹èÃâÃøÀÇ Á¤¾Ð ¹× ÆßÇÁÀÇ ÀüÈÄ Â÷¾ÐÀÌ ´õÇØÁ®¼­ ¹èÃⱸÃø¿¡ ³ªÅ¸³ª°Ô µË´Ï´Ù.  ±â±âÀåÄ¡°¡ ÆßÇÁº¸´Ù ²Ï ³ôÀº °÷¿¡ ¼³Ä¡µÇ¾î ÀÖ´Â °æ¿ì¶ó¸é  ¾×À¸·Î °¡µæÂ÷ ÀÖ´Â ±â±âÀåÄ¡ÀÇ ¸Ç À§ ¾×¸é¿¡¼­´Â Á¤¾ÐÀÌ ÀÛÁö¸¸ ±â±â ¹Ù´Ú¿¡¼­´Â ³ôÀÌÂ÷¿¡ ÇØ´çÇÏ´Â ¸¸Å­ÀÇ Á¤¾ÐÀÌ ´ú °É¸®°Ô µË´Ï´Ù.  Pump ¹ØÀ¸·Î ¼ö¹é¹ÌÅÍ ÇϺηΠ¿¬°áµÇ¾î ÀÖ´Ù¸é (ÆßÇÁ°¡ °ø±ÞÇÏ´Â ¾Ð·Âº¸´Ù) ¾ÆÁÖ Å« Á¤¾ÐÀÌ ÀÛ¿ëµÉ ¼ö ÀÖ½À´Ï´Ù. 

µû¶ó¼­ Shut-off  Pressure¸¦ °í·ÁÇÏ¿© ¼³°è¾Ð·ÂÀ» °áÁ¤ÇÏ°íÀÚ ÇÑ´Ù¸é  ¿¬°áµÈ ¹è°ü°ú ±â±â, ¿îÀü¾Ð·Â, ÆßÇÁÂ÷¾Ð, »Ó ¸¸ ¾Æ´Ï¶ó ±â±âÀåÄ¡ÀÇ ¼Ó¼º µîÀ» Á¤È®È÷ Áø´ÜÇÏ¿© °áÁ¤ÇØ¾ß ÇÕ´Ï´Ù.
À¸¾îÁøÂ¥ d923789   23-05-09 16:37
Á¦°¡ ±ÛÀ» ÀÛ¼ºÇÏ·Á¸é ¾î¶²ÀýÂ÷°¡ Ȥ½Ã ÇÊ¿äÇÑÁö
½ºÅ×Æijë Stefano   23-05-10 02:16
ÀÚ±â¼Ò°³¼­¸¦ ¹«¼ºÀÇ ÇÏ°Ô Àû¾îµÎ´Â °æ¿ì ȸ¿øµî±ÞÀÌ 1µî±Þ¿¡ ¸Ó¹°°Ô µÇ±âµµ Çϴµ¥  ÀÌ·²¶§´Â  ±Û¾²±â°¡ Áö¿øµÇÁö ¾Ê°í ÀڷḦ ´Ù¿î¹ÞÀ» ¼öµµ ¾ø½À´Ï´Ù.
   

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