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¢Ã ¾Ð·Â°ú¼Óµµ ùÚÍ£ PV Limits

- ·ÎŸ¸®¾Á ¼±Á¤½Ã °í·Á»çÇ× Rotary Sealing Considration
¿¡³ÊÀÚÀÌµå ¾Á°ú ·ÎŸ¸® ¸³¾Á ¼³°è½Ã Ưº°ÇÑ »çÇ×µéÀÌ °í·ÁµÇ¾î¾ß ÇÑ´Ù. ¿Õº¹¿îµ¿¿ë ¾Á(Reciprocating Seal)°ú´Â ´Þ¸®,ȸÀü¿ë ¾Á(Rotary Seal)¿¡¼­´Â ¿©·¯StressµéÀÌ ÁýÁߵǴ ÀÛÀº ½Àµ¿¸é¿¡ ±¹ºÎÀûÀ¸·Î ¹ß»ýÇÏ´Â ¿­,¸¶Âû ¹× ¸¶¸ð°¡ ¾ÁÀÇ ¸¶¸ð¸¦ °¡¼ÓÈ­ ½ÃŲ´Ù.
- ¾Ð·Â°ú ¼Óµµ Pressure-Velocity
¿¡³ÊÀÚÀÌµå ¾Á°ú ·ÎŸ¸® ¸³¾Á ¼³°è½Ã ÀÏÂ÷ÀûÀÎ °í·Á»çÇ×Àº »ç¿ëȯ°æÀÇ ¾Ð·Â°ú ¼Óµµ°ª(PV)ÀÌ´Ù.
PV´Â ¸Åü(Media)ÀÇ ¾Ð·Â(Pressure : psi)°ú »çÇÁÆ®ÀÇ Ç¥¸é¼±¼Óµµ(surface feet per minute : sfpm) ÀÇ °öÀÌ´Ù. (sfpm = »þÇÁÆ®°æinch×0.26×RPM)
eg) »þÇÁÆ®°æ : 2.500".3,000 rpmÀÎ °æ¿ì sfpm ; 0.26×2.500inch×3,000rpm= 1950sfpm ¾Ð·Â Pressure:50psiÀ̸é, PV Value : 1950×50= 97,500

 PV Limit :PVÇÑ°è°î¼± ¾Æ·¡(Mild wear zone)¿¡¼­´Â Á¤»óÀûÀÎ ¾à°£ÀÇ ¸¶¸ð°¡ ¹ß»ýÇϳª,ÇÑ°è°î¼±À» ³Ñ°ÔµÇ¸é(Severe wear zone) ½ÉÇÑ ¸¶¸ð°¡ ¹ß»ýÇÏ°ÔµÇ¸ç ±×¸¸Å­ ¾ÁÀÇ ¼ö¸íÀÌ ´ÜÃàµÈ´Ù.

½ÇÁ¦ÀÇ PVÇÑ°è´Â ¾Ð·Â°ú ¼ÓµµÀÌ¿Ü¿¡,Operating Temperature(»ç¿ë¿Âµµ).À±È°»óÅÂ,Á¢Ã˸éÀÇ Ç¥¸éÁ¶µµ, µî¿¡ µû¶ó ´Ù¸£´Ù.
¿Âµµ°¡ ³ôÀ»¼ö·Ï,»ç¿ë°¡´É¾Ð·Â°ú PVÇÑ°èÄ¡´Â °¨¼ÒÇÏ°í ¸¶¸ðÀ²ÀÌ Áõ°¡µÈ´Ù.
³Ã°¢Á¦°¡ ÀÖÀ¸¸é ³ôÀº PVÀû¿ë¿¡¼­ ¾ÁÀÇ ¸¶¸ð¸¦ ÁÙÀϼö ÀÖ´Ù.
À±È°»óÅ°¡ ÁÁÀ»¼ö·Ï ´ç¿¬È÷ »ç¿ë°¡´É ¾Ð·Â°ú PVÇÑ°èÄ¡´Â Ä¿Áö°í ¸¶¸ðÀ²ÀÌ °¨¼ÒµÈ´Ù.

Rotary Shaft Seal Selection between Spring Energized Seal and Rotary Lip Seal

 ½ºÇÁ¸µ¿¡³ÊÀÚÀÌµå ·ÎŸ¸® ¾Á°ú ¸³¾ÁÀÇ ºñ±³

Spring Energized Rotary Shaft Seal vs. Rotary Lip Seal

½ºÇÁ¸µLoad(Spring Force)°¡ ¾ø´Â ·ÎŸ¸® ¸³¾ÁÀº, sealing LipÀÇ loadingÇü½Ä°ú ¾Á ±¸Á¶¿¡¼­ ¿¡³ÊÀÚÀÌµå ¾Á°ú Å« Â÷ÀÌ°¡ Àֱ⠶§¹®¿¡,»ç¿ë¾Ð·Â,¼Óµµ ¹× PV rating(¾Ð·Â*¼ÓµµÇÑ°è)¿¡¼­ ½ºÇÁ¸µ¿¡³ÊÀÚÀÌµå ¾Á°ú´Â ´Ù¸£´Ù.
½ºÇÁ¸µ¿¡³ÊÀÚÀÌµå ·ÎŸ¸®¾ÁÀº ¸³¾Á º¸´Ù »ó´ëÀûÀ¸·Î Operating Pressure(»ç¿ë¾Ð·Â)Àº ³ôÀ¸³ª, ¹Ý¸é¿¡ Operating Velocity(»ç¿ë¼Óµµ :»þÇÁÆ®ÀÇ È¸Àü¼Óµµ,sfpm)´Â ³·´Ù.
¿¡³ÊÀÚÀ̵å·ÎŸ¸®¾ÁÀÇ Spring Èû(Load)Àº ¾ÁÀÇ ¹ÐÆó·ÂÀ» Å©°ÔÇØÁÖ´Â ¹Ý¸é¿¡,ÀÌ·¯ÇÑ ½ºÇÁ¸µÈûÀº ¶ÇÇÑ ¿ª½Ã ¾ÁÀÇ ¸¶Âû·Â°ú ¿­¹ß»ýÀ» Áõ°¡½ÃŲ´Ù(¾ÁÀÇ ¸¶¸ð°¡ »¡¶óÁü).ÀÌ·¯ÇÑ ÀÌÀ¯·Î ¿¡³ÊÀÚÀÌµå ¾ÁÀÇ ÃÖ´ë Ç¥¸é¼Óµµ(sfpm)°¡ Á¦ÇѵȴÙ.
MetalÄÉÀ̽ºÀÇ ¸³¾ÁÀÇ »ç¿ë¾Ð·ÂÀº Type¿¡ µû¶ó,150psi,250,500psi·Î,ÀÌ·¯ÇÑ »ç¿ë¾Ð·ÂÀº ¸³¾ÁÀÇ ¾ãÀº Sealing Lip¿¡ ÀÇÇØ Á¦ÇÑÀ» ¹Þ´Â´Ù.±×·¯³ª ±×·¯ÇÑ ±¸Á¶Àû Â÷À̶§¹®¿¡ »ç¿ë¾Ð·ÂÀº Á¦ÇÑÀ» ¹Þ´Â ¹Ý¸é¿¡ Spring Load°¡ ¾ø±â¶§¹®¿¡(½ºÇÁ¸µ¿¡ ÀÇÇÑ ¸¶Âû°ú ¿­¹ß»ýÀÌ Àû¾î¼­) ¿¡³ÊÀÚÀ̵å¾Á¿¡ ºñÇØ Operating Velocity(sfpm Ç¥¸é¼±¼Óµµ)Àº ³ô´Ù.
ƯÁ¤ÀÇ »ç¿ëȯ°æ¿¡¼­ ¿¡³ÊÀÚÀÌµå ¾Á°ú ¸³ ¾ÁÁß¿¡¼­ ¾î´À °ÍÀ» ¼±ÅÃÇÏ´Â °ÍÀÌ °¡Àå ÁÁÀº °¡´Â ±× »ç¿ëȯ°æ¿¡¼­ º¸´Ù Áß¿äÇÑ °í·Á¿ä¼Ò°¡ ¾Ð·ÂÀÌ³Ä ¾Æ´Ï¸é ¼ÓµµÀΰ¡¿¡ µû¶ó ´Þ¶óÁø´Ù.

 È¸Àü¿ë ¾Á(Rotary Shaft Seal)ÀÇ ¼±Á¤

Rotary Shaft Seal Selection between Spring Energized Seal and Rotary Lip Seal
À¯Ã¼¾Ð·ÂÀÌ 500psi(34.47bar,3.45Mpa.35.15Kg/cm2)°¡ ³ÑÀ¸¸é,¿¡³ÊÀÚÀÌµå ·ÎŸ¸®¾ÁÀ» ¾´´Ù. ¿¡³ÊÀÚÀ̵å¾ÁÀº ¿ø·¡°¡ »þÇÁÆ®¼Óµµ°¡ ³·Àº ³ôÀº ¾Ð·Â¿¡ »ç¿ëµÇµµ·Ï µÇ¾îÀÖ´Ù.
¾Ð·ÂÀÌ 500psiÀÌÇÏÀÌ°í ¼±¼Óµµ°¡ 100sfpm(surface feet per minute:0.508m/s)À» ³ÑÀ¸¸é ¸³¾ÁÀ» »ç¿ëÇÏ´Â °ÍÀ» °í·ÁÇÑ´Ù.

Seal Design
Type No.

Temp.
Range

Max.psi
at 10 sfpm

Max.sfpm
at 20 psi

Normal PV
Limit

Rotary Lip Seal

-148~500¢µ
-100~260¡É

150 psi
10bar

8,000sfpm
40m/s

160,000

FRS-104,FRS-105
Rotary Lip Seal

-148~500¢µ
-100~260¡É

250 psi
17.2bar

10,000sfpm
50.8m/s

250,000

FRS-103
Rotary Lip Seal

-148~500¢µ
-100~260¡É

500psi
34.5bar

4,000sfpm
20m/s

160,000

FRS-110
Spring Energized Seal

-148~500¢µ
-100~260¡É

2,000psi
138bar

2,500sfpm
12.7m/s

160,000

F700R
£ªÀ§ÀÇ ¼öÄ¡´Â 70¢µ(=21¡É),À±È°»óÅ¿¡¼­ÀÇ RatingÀÓ
£ªF700R : surface speed 15m/s.Max Operating Pressure is dependent upon the rotational speed.
 

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Tel : 070-4027-4882      Fax : 070-4027-4885      Email : sales @anyseal.co.kr