1. UNBALANCE DI 2GA-721A SEA WATER INTAKE Oleh Puji Harjono

2. FOTO 2GA-721A

6. GAMBAR 1. Spectrum di 1V

7. GAMBAR 2. Spectrum di 1H

8. TABEL 1. Data 2GA-721A Date Time Overall Vibration Unit Direction 10/7/2005 8:55:00 AM 6.250429506 mm/s rms 1VVel 10/7/2005 8:56:27 AM 6.098374744 mm/s rms 1HVel 10/7/2005 9:02:37 AM 2.246351474 mm/s rms 2VVel 10/7/2005 8:57:56 AM 2.69984879 mm/s rms 2HVel 10/7/2005 9:00:41 AM 2.715275661 mm/s rms 2HVelHR 10/7/2005 9:03:40 AM 0.693448097 mm/s rms 2AVel 10/7/2005 9:04:49 AM 1.39192098 mm/s rms 3VVel 10/7/2005 9:05:56 AM 1.62059266 mm/s rms 3HVel 10/7/2005 9:07:00 AM 0.706631475 mm/s rms 3AVel 10/7/2005 9:08:16 AM 1.066816725 mm/s rms 4VVel 10/7/2005 9:09:38 AM 1.3577132 mm/s rms 4HVel 10/7/2005 9:10:26 AM 0.685339476 mm/s rms 4AVel

10. TABEL 2 .Data 2GA-721B Date Time Overall Vibration Unit Direction 10/7/2005 9:14:50 AM 1.442163618 mm/s rms 1VVel 10/7/2005 9:15:56 AM 1.861148067 mm/s rms 1HVel 10/7/2005 9:21:39 AM 0.75699978 mm/s rms 2VVel 10/7/2005 9:17:11 AM 1.000141318 mm/s rms 2HVel 10/7/2005 9:20:10 AM 1.075138744 mm/s rms 2HVelHR 10/7/2005 9:22:35 AM 0.851375932 mm/s rms 2AVel 10/7/2005 9:23:34 AM 0.63407457 mm/s rms 3VVel 10/7/2005 9:25:00 AM 0.85300779 mm/s rms 3HVel 10/7/2005 9:25:57 AM 1.123258125 mm/s rms 3AVel 10/7/2005 9:26:56 AM 0.561220605 mm/s rms 4VVel 10/7/2005 9:28:08 AM 0.788174445 mm/s rms 4HVel 10/7/2005 9:29:01 AM 1.01458324 mm/s rms 4AVel

12. Tabel 3. Motor Solo Run Date Time Vibration Value Unit Direction 10/7/2005 13:18:50 PM 8.24401161214 mm/s rms 1VVel 10/7/2005 13:19:56 PM 8.18611434411 mm/s rms 1HVel 10/7/2005 13:23:39 PM 4.2113298701 mm/s rms 2VVel 10/7/2005 13:27:11 PM 4.21198351318 mm/s rms 2HVel 10/7/2005 13:27:11 PM 4.12233818476 mm/s rms 2AVel

16. Gambar 5. Spectrum 2GA-721B

19. Gambar 6A. Balancing Rotor Data

20. Gambar 6B. Balancing Rotor Data

21. Gambar 7a, 7b dan 7c 7a. Surge Test 7b. PI and Winding ResistanceTest 7c. IR Test

22. Setelah overhaul selesai, dilakukan kembali motor solo run pada tanggal 23 Desember 2005 dengan hasil seperti di Tabel-4 berikut: Tabel - 4 Date Time Vibration Value Unit Direction 12/23/2005 10:15:50 AM 1.01552341884 mm/s rms 1VVel 12/23/2005 10:16:53 AM 1.00165540123 mm/s 1HVel 12/23/2005 10:20:22 AM 0.12154432801 mm/s rms 2VVel 12/23/2005 10:24:16 AM 0.90034521318 mm/s rms 2HVel 12/23/2005 10:24:17 AM 0.10232233476 mm/s rms 2AVel

23. Pada tanggal 27 Desember 2005, motor dikopel kembali ke pompa dan dilakukan test run dengan hasil bagus. Diukur kembali getaran mesin tersebut dengan hasil seperti terlihat di Gambar 8 a, 8b dan 8c Gambar 8a. Spectrum arah 1V After overhaul Before overhaul

24. Gambar 8b. Spectrum arah 1H Blue line before overhaul, 4.77 mm/s RMS Yellow line After overhaul, 4.77 mm/s RMS

25. Gambar 8c. Spectrum 1H resolusi tinggi = Pole Pass frequency 3x 2x 1x Green line after overhaul Blue line before overhaul

26. Untuk nilai overall secara keseluruhan dari 2GA-721A setelah dioverhaul dapat dilihat di Tabel-5 di bawah ini: Tabel-5 Date Time Overall Vibration Value Unit Direction 12/26/2005 3:44:09 PM 0.850117193 mm/s rms 1VVel 12/26/2005 3:45:07 PM 1.400771596 mm/s rms 1HVel 12/26/2005 3:51:04 PM 0.345626311 mm/s rms 2VVel 12/26/2005 3:46:12 PM 0.64859068 mm/s rms 2HVel 12/26/2005 3:48:51 PM 0.727053501 mm/s rms 2HVelHR 12/26/2005 3:51:58 PM 0.417989167 mm/s rms 2AVel 12/26/2005 3:53:09 PM 0.2459022 mm/s rms 3VVel 12/26/2005 3:54:11 PM 0.42405706 mm/s rms 3HVel 12/26/2005 3:54:58 PM 0.434653 mm/s rms 3AVel 12/26/2005 3:56:03 PM 0.24546844 mm/s rms 4VVel 12/26/2005 3:57:13 PM 0.4434934 mm/s rms 4HVel 12/26/2005 3:58:04 PM 0.39325046 mm/s rms 4AVel

28. Foto-foto overhaul 2GA-721A

29. TERIMA KASIH