Maintenance Of Bch

Maintenance Procedure for Hitachi Centrifugal Compressor (BCH type) (圧縮機のメンテナンス)BCH

Hitachi Plant Technologies, ltd.

Hitachi compressor line up (日立圧縮機製品) 日立圧縮機製品)

Compressor Hi turbo compressor

Centrifugal compressor

HORIZONTALL SPLIT

Screw compressor

VERTCALLY SPLIT

DH-type centrifugal compressor

Rechiprocating compressor

VERTICALLY SPLIT (BCH TYPE)

Maintenance Safety first 4. INNER CASING

5. INTERMEDIATE CASING 11.　Coupling

１.　DIAPHRAGM

7. DRY GAS SEAL 9. Coupling hub 8. OIL SEAL LABYRINTH

12.　 IMPELLER SHAFT

10.　BEARING

2.　LABYRINTH

6. HEAD FLANG CASING

Safety first

Flow chart of compressor assembly 1.Assembly of diaphragm 2.Assembly of labyrinth 3.Measurement for Labyrinth clearance

4.Assembly of rotor and Inner casing

5. Installation of inner casing

Gas seal labyrinth

6.Assembly of head flange casing

7.Assembly of DRY GAS SEAL

9.Assembly of coupling HUB

Oil seal labyrinth 10.Assembly of center tube

8. Assembly of Bearing

Flow chart of compressor assembly

1.Assembly of diaphragm 2.Assembly of labyrinth 3.Measurement for Labyrinth clearance

4.Assembly of rotor and Inner casing

5. Installation of inner casing

Gas seal labyrinth

6.Assembly of head flange casing

7.Assembly of DRY GAS SEAL

9.Assembly of coupling HUB

Oil seal labyrinth 10.Assembly of center tube

8. Assembly of Bearing

1. Assembly of diaphragm 1.Set diaphragm on inner casing (刻印に合わせ組込) 2, Check match mark 　　(刻印)

Diaphragm

3.Check level 　　(段差測定) Bearing

Flow chart of compressor assembly 1.Assembly of diaphragm

2.Assembly of labyrinth 3.Measurement for Labyrinth clearance

4.Assembly of rotor and Inner casing

5. Installation of inner casing

Gas seal labyrinth

6.Assembly of head flange casing

7.Assembly of DRY GAS SEAL

9.Assembly of coupling HUB

Oil seal labyrinth 10.Assembly of center tube

8. Assembly of Bearing

2. Assembly of Labyrinth 1. Set labyrinth on inner casing.

Check match mark!

3. Measurement of Labyrinth　clearance 1. Set upper and lower labyrinth on diaphragm. (上下のラビリンスを下側へ組込み)

2.Measure and record inside diameter of labyrinth using inside micrometer. (two place measurement) (インサイドマイクロで2箇所測定)

3. Measurement of Labyrinth　clearance 3. Measure outside of impeller (インペラ外周測定)

　(Labyrinth inside diameter )　-　(Impeller outside diameter)　=　Clearance

Check the allowable clearance on “Clearance List” (クリアランスリストによる)

4. Assembly of rotor and inner casing. 1. Set rotor on labyrinth correctly (ラビリンスとインペラを合わせる)

2. Use guide bolt

3.Confirm no discrepancy (食い違いの確認)

5.Installation of inner casing 1. Set guide rail

2.Hook up inner casing horizontally (水平に吊る)

4.Install casing using Special tool 3.Set inner casing on guide rail (ガイドレールとインナーケースを合わせる) (押込み冶具のセット)

5.Installation of inner casing 1.After install inner casing to balance labyrinth position, lift up the shaft a little. (バランスラビリンスまで押し込んだら シャフトを少し吊り上げる)

2.Check position of the inner casing (インナーケースと外ケースの 半割れ位置合わせる)

6. Assembly head flange casing. 1. Set guide bolt 2. Lift up head flange using special tool. (ヘットフランジ専用吊り具の使用)

3. Assemble head flange using fastening bolts and check head flange installed correctly (締付けﾅｯﾄを使用平均に押しこむ)

6. Assembly head flange casing. 4. Jack up shaft and set gas seal labyrinth

7.Assembly of DRY　GAS SEAL 1. Measure rotor and casing position (ローター位置寸法確認)

2. Check thrust ring position (固定ビンの位置合わせ)

Jig

3.Set rotor positing Jig

7.Assembly of DRY　GAS SEAL 4. Set dry gas seal and jig and check direction of rotation (回転方向を合わせる)

Protection of casing

5.Set of dial gauge. Check no rotor movement (ダイヤルゲージをセットしてローター の移動のない事) 6.Install dry gas seal using special tool (押込み冶具を使用して平均に押し込む)

7.Assembly of DRY　GAS SEAL 7.After install dry gas seal disassemble installation plate (組込みプレートの取外し)

8.Set dry gas seal fixing parts. (ドライガスシール固定用部品の組込み)

7.Assembly of DRY　GAS SEAL 9. Completion of dry gas seal assembly (組込み完了) 10. Set opposite side dry gas seal according to same procedure (反対側も同様の組込みを行なう)

8. Oil seal labyrinth 1.Set oil seal labyrinth and check match mark!

Guide bolt Lift up shaft with jack bolt

9.Assembly of Coupling HUB 1. Set special tool for hydro fitting of coupling hub

9.Assembly of Coupling HUB 2. Check no damage on shaft surface and inside of coupling hub with hand touch. (シャフトに傷等ないか手で触って確認)

3. Repair by whetstone if necessary (砥石で仕上げる)

9.Assembly of Coupling HUB 4. Blown inside of oil hole (油穴の内部を洗浄する)

5. Mount HUB on rotor Check match mark! (ハブとシャフトの合いﾏｰｸを合わせ組付け)

6. Check dimension after installation (取りつけ後の寸法確認) Outside diameter

position

9.Assembly of Coupling HUB 7.Check outer diameter of rotor (押し込み前の外形寸法測定)

8. Set oil pressure gauge and dial gauge. (押し込み冶具とダイヤルゲージの組付け) 9. Install hub Check position with dial gauge (ダイヤルｹﾞｰジの数値を確認しながら 指定数値まで押し込み)

9.Assembly of Coupling HUB 10.Check of dimension after install (指定押し込み量後外形変形量の確認) (1)Keep pressure on pushing side (2)Release pressure on expanding side (1)押し込み側圧力は、其のままキープする (2)拡大側圧力は、“0”　とする

9.Assembly of Coupling HUB 11.After one hour, measure outer diameter of hub. (1時間後外径変形値の測定)

Confirmation　 ①Outside diameter ②Amount of pushing. 12.After removing jig, check actual axial thrust movement (ジグを取外し押し込み量の確認)

9.Assembly of Coupling HUB 13.Lock nut shall be tightened by jig (専用工具を使用してﾅｯﾄを締め付ける)

14. Tight lock bolts (専用冶具を使用してﾅｯﾄを締付ける)

10. Bearing 1. Measure bearing interference

2. Put Lead wire (Dia=0.36mm L= 40mm) on upper bearing housing. (鉛線を背面に取り付ける) 3. Install stainless steel liner (Thickness 0.2 to 0.3 mm thickness) (0.2～0.3㎜のライナーを入れる)

(2) Measuring of Bearing Clearance.

Fix three lead wires on the shaft equally spaced with grease within the pad width. The diameter of lead wire is 0.36mm and its Length will be a oneone-fourth of perimeter.

(シャフトに鉛線を取り付ける) シャフトに鉛線を取り付ける)

Tighten the set screw and adjust to make the clearance between the tip of special Bolt and the bottom of pad to 1.01.0-2.0mm. (セットボルトとパットの隙間は、1.0 ～2.0　 セットボルトとパットの隙間は、1.0～ 2.0　mmとする mmとする))

It confirms for surface Rotation instruction confirmation (回転方向を合わせる) 回転方向を合わせる)

(合わせ面の手入れ) 合わせ面の手入れ)

Install the bearing cap and tighten it. Firstly fix with knock bolt, then tighten the set bolts. Refer to the relevant page for the tightening. Confirmation of position (位置ずれの確認) 位置ずれの確認)

(ノックボルトを入れセットボルトを締付ける) ノックボルトを入れセットボルトを締付ける) (締付けトルクトルクの近い数値で) 締付けトルクトルクの近い数値で)

Lead wire

Measurement

※　Allowable clearance : Refer to “ clearance List” (クリアランスリストを参照) クリアランスリストを参照)

11. Thrust Bearing　

It confirms it in the drawing.

RTD and the instruction of the rotation are noted.

Paints for oil

Confirmation of mark

Inside of (0) mark

Attaches set　 set　screw

Thrust bearing collar

Attaches of lock nut

Fixation of key

Inside　 Inside　：　1 ：　1　－　1 　－　1　　　Outside 　　　Outside : 　2 －　1 －　1

Fixation　 Fixation　of RTD　 RTD　line

Assembly of bearing cap

Measurement　 Measurement　of thrust gap

12. Center tube 10-1. Assembly for center tube ※The one to confirm coupling assembly drawing. (カップリング図面の確認)

Check on attaching parts (組付け部品のチェック)

The diaphragm is set to the respect of guard. (ダイヤフラム面とガード面を合わせる)

The suitable mark of the hub and guard. (ハブとガードの合いﾏｰｸを合わせる) ハブとガードの合いﾏｰｸを合わせる)

It tightens with special spanner (専用工具を使用締付ける) 専用工具を使用締付ける)

Rubber hammer It puts it until the coupling bolts entertain (カップリングボルトを締付けるまで) カップリングボルトを締付けるまで)

Special tool and the tightening torque. (専用トルクレンチを使用締付ける) 専用トルクレンチを使用締付ける)

similar as for the other side. (反対側も同様) 反対側も同様)

The coupling cover is attachment. (カップリングカバーの組付け) カップリングカバーの組付け)

13. Balance work　

The final balance check (総合纏めバランス) 総合纏めバランス)

Monitor

Flow chart of balance work Balance of impeller

Confirmation

Over speed spin test

Balance of shaft Magnetic particle examination

Assembly of impeller and shaft

Integrated balance

Axis vibration measurement

Balance of unit

Shaft

Size confirmation

Magnetic particle examination 　　( 　　(磁粉探傷試験) 磁粉探傷試験)

Over speed spin test

Assembly of Impeller and shaft

Integrated balance

14. Axis vibration measurement

Axis vibration measurement (電磁的にランアウト測定) 電磁的にランアウト測定)

After completing it, it protects it with the tape. (完了後テープを巻いて保護する) 完了後テープを巻いて保護する)

It is recorded by the record. (レコーダーへ記録) レコーダーへ記録)