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IHC LAGERSMIT Installation and maintenance instructions SUPREME®
stern tube seals
02/05 1
CONTENTS
CHAPTER PAGE
DATA SHEET...
IHC LAGERSMIT Installation and maintenance instructions SUPREME®
stern tube seals
02/05 2
DATA SHEET SUPREME®
SUPREME®
aft...
IHC LAGERSMIT Installation and maintenance instructions SUPREME®
stern tube seals
02/05 3
1. INTRODUCTION
This manual is f...
IHC LAGERSMIT Installation and maintenance instructions SUPREME®
stern tube seals
02/05 4
2. GENERAL
2.1 Product descripti...
IHC LAGERSMIT Installation and maintenance instructions SUPREME®
stern tube seals
02/05 5
Figure 2.2: SUPREME aft seal (st...
IHC LAGERSMIT Installation and maintenance instructions SUPREME®
stern tube seals
02/05 6
2.1.3 The SUPREME forward seal
T...
IHC LAGERSMIT Installation and maintenance instructions SUPREME®
stern tube seals
02/05 7
3. INSTALLATION INSTRUCTIONS SUP...
IHC LAGERSMIT Installation and maintenance instructions SUPREME®
stern tube seals
02/05 8
5. Check the alignment of the se...
IHC LAGERSMIT Installation and maintenance instructions SUPREME®
stern tube seals
02/05 9
7. Check the run-out of the line...
IHC LAGERSMIT Installation and maintenance instructions SUPREME®
stern tube seals
02/05 10
Additional instructions for SUP...
IHC LAGERSMIT Installation and maintenance instructions SUPREME®
stern tube seals
02/05 11
Carrying out the zero wear down...
IHC LAGERSMIT Installation and maintenance instructions SUPREME®
stern tube seals
02/05 12
Installing:
1. Take the precaut...
IHC LAGERSMIT Installation and maintenance instructions SUPREME®
stern tube seals
02/05 13
With respect to the possibility...
IHC LAGERSMIT Installation and maintenance instructions SUPREME®
stern tube seals
02/05 14
4. PUTTING INTO OPERATION
For p...
IHC LAGERSMIT Installation and maintenance instructions SUPREME®
stern tube seals
02/05 15
4. Fill the additional tank wit...
IHC LAGERSMIT Installation and maintenance instructions SUPREME®
stern tube seals
02/05 16
5. MAINTANANCE / REPAIRS
The fo...
IHC LAGERSMIT Installation and maintenance instructions SUPREME®
stern tube seals
02/05 17
5.3.1 Overhaul of the aft seal
...
IHC LAGERSMIT Installation and maintenance instructions SUPREME®
stern tube seals
02/05 18
5.3.1.3 Shortening the springs ...
IHC LAGERSMIT Installation and maintenance instructions SUPREME®
stern tube seals
02/05 19
6. OPTIONAL EXTRAS
To extend th...
IHC LAGERSMIT Installation and maintenance instructions SUPREME®
stern tube seals
02/05 20
WEAR DOWN PROTOCOL
IHC LAGERSMIT Installation and maintenance instructions SUPREME®
stern tube seals
02/05 21
SPARE PARTS / SERVICE
To ensure...
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Strentube

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  1. 1. IHC LAGERSMIT Installation and maintenance instructions SUPREME® stern tube seals 02/05 1 CONTENTS CHAPTER PAGE DATA SHEET 2 1. INTRODUCTION 3 2. GENERAL 4 3. INSTALLATION INSTRUCTIONS SUPREME STERN TUBE SEAL 7 4. PUTTING INTO OPERATION 14 5. MAINTENANCE / REPAIRS 16 6. OPTIONAL EXTRA’S 19 ENCLOSURES WEAR DOWN PROTOCOL SPARE PARTS / SERVICE TYPE APPROVAL CLASS. (copy) ASSEMBLY DRAWING AFT SEAL ASSEMBLY DRAWING FORWARD SEAL DRAWING CIRCULATION OILTANK DRAWING 20 L. OIL TANK DRAWING LUBRICATION SCHEME _____________________________________________________________________ _____________________________________________________________________
  2. 2. IHC LAGERSMIT Installation and maintenance instructions SUPREME® stern tube seals 02/05 2 DATA SHEET SUPREME® SUPREME® aft seal SUPREME® forward seal Size Type Serial no Drawing no IHC Lagersmit order no
  3. 3. IHC LAGERSMIT Installation and maintenance instructions SUPREME® stern tube seals 02/05 3 1. INTRODUCTION This manual is for the professional assembly, maintenance and dismantling of the SUPREME® ∗ stern tube seal and is intended for those persons who have to carry out above mentioned tasks. The products of IHC Lagersmit BV∗∗ have been designed and manufactured to reflect the technological state of the art. Nevertheless, it cannot be ruled out that danger may arise to: • Life and limp; • the product and/or overall plant; • other aspects. Make sure the safety instructions given in this manual are carefully observed. Where needed, the instructions in this manual are supplied with symbols for specified dangers: : danger to life and limb : danger to the product and/or the overall plant : danger to other aspects In particular, hazards may occur: • if insufficiently trained personnel manipulates the product; • if the product is inexpertly installed, operated and serviced; • if the product is used for other than the intended purposes. Beside the danger symbols above the next symbol is used in this manual: : attention to notes All persons responsible for the operation of the product must: o be familiar with the contents of this manual; o have adequate technical qualifications and are authorized to perform the relevant activity. No modifications to the product are permitted unless the prior approval of IHC Lagersmit is obtained. The content of this specification is the property of IHC Lagersmit and may not be brought to the knowledge of third parties either in the original form or by reproduction. Although the information in this manual has been checked and reproduced as carefully as possible no responsibility can be accepted for faults and/or incompleteness. IHC Lagersmit reserves the right to alter the information given in this manual without prior warning. ∗ SUPREME is a registrated trademark ∗∗ IHC Lagersmit BV, abbreviated IHC Lagersmit, is a member of the IHC Holland Merwede Group.
  4. 4. IHC LAGERSMIT Installation and maintenance instructions SUPREME® stern tube seals 02/05 4 2. GENERAL 2.1 Product description* The SUPREME stern tube seal system consists of a SUPREME aft seal, an aft bearing bush, a forward bearing bush and a SUPREME forward seal. The SUPREME stern tube seals are used for sealing the stern tube at the points where the shaft penetrates. The oil level in the stern tube tank should be 3 to 4 meters above the loaded water-line (LWL). Figure 2.1 shows an example of a complete stern tube system. Figure 2.1: Example of a complete stern tube system 2.1.1 The SUPREME aft seal The aft seal exists of three rubber lip seals which are clamped in the house parts. The lip seals are sealing at a corrosion proof liner. The purpose of the aft seal is to prevent (sea) water ingress and oil outlet from the stern tube. The lip seals can be replaced without removing the propeller or withdrawing the propeller shaft. * A typical model is described. Consult the appropriate assembly drawing for detailed information.
  5. 5. IHC LAGERSMIT Installation and maintenance instructions SUPREME® stern tube seals 02/05 5 Figure 2.2: SUPREME aft seal (standard design) The SUPREME aft seal is also available in a fully split execution, called the SUPREME 2/2. This seal affords the possibility to replace the lip seals and the liner without removing the propeller or withdrawing the propeller shaft. The principal of sealing, materials, etc. is equal to that of the standard SUPREME aft seal. This manual describes instructions belonging to the standard SUPREME seals. Additional instructions regarding SUPREME 2/2 aft seals will be stated separately. In order to protect the liner against corrosion IHC Lagersmit recommends a grounded propeller shaft. 2.1.2 Bearing bushes The bearing bushes of IHC Lagersmit are made of cast iron lined with a white metal bearing surface. The bearing bushes shown in figure 2.3 must be lubricated with lubrication oil only. Figure 2.3: Oil lubricated bearing bushes
  6. 6. IHC LAGERSMIT Installation and maintenance instructions SUPREME® stern tube seals 02/05 6 2.1.3 The SUPREME forward seal The forward seal exists of two lip seals which are clamped in the house parts. The lip seals are sealing at a cast iron liner which is provided with a ceramic surface. This liner is connected to the shaft with the aid of a splitted clamping ring. The purpose of the seal is to prevent oil outlet from the stern tube. The lip seals are lubricated with oil from a circulation tank. The rotation of the propeller shaft together with the presence of a scraper in the seal forces the oil to circulate. Figure 2.4: SUPREME forward seal (standard design) 2.2 Handling and storing of the product If the product is stored for a longer period, the product has to be stored in a clean and dry place. The seal must be protected against any kind of damage. IHC Lagersmit recommends storing the product in the original packaging.
  7. 7. IHC LAGERSMIT Installation and maintenance instructions SUPREME® stern tube seals 02/05 7 3. INSTALLATION INSTRUCTIONS SUPREME STERN TUBE SEAL* The following precautions must be taken before commencing the installation of the SUPREME stern tube seals. Precautions: 1. Check the shaft and stern tube for damage and/or dirt; The shaft and stern tube should be free of imperfections such as dirt and/or damage/burs. 2. Check the goods for transport damage and/or incompleteness; If any transport damage is noted and/or anything is missing contact IHC Lagersmit. 3. Check the connection sizes; If the connection sizes do not agree with those in the drawing the stern tube seal cannot be fitted. In that case consult IHC Lagersmit. 4. Check the pipes and oil tank(s) for internal dirt, damages and leakages The pipes and tank(s) should be free of imperfections such as dirt, damages and leakages. 3.1 Installing the stern tube aft seal The SUPREME aft seal is delivered completely assembled, including brackets. In order to prevent damage to the liner as well as the lip seals, the complete seal must slid onto the propeller shaft as a unit, including the brackets. The shaft may not be driven when work is carried out on the seal. The brackets are not suitable for lifting purposes. Install: 1. Take the precautions mentioned; 2. Oil the shaft; 3. Fit the complete stern tube seal according the assembly drawing; Mind the correct position of the gaskets and the bleed plug. With respect to the alignment don’t secure the bolts of the flange ring yet. Remove the brackets! If the brackets are not removed the installation will cause damage when the seal is put into operation. The brackets do not determine the built-in length. 4. Couple the propeller shaft and fit the propeller * Instructions regarding bearing bushes will not be dealt with in this manual.
  8. 8. IHC LAGERSMIT Installation and maintenance instructions SUPREME® stern tube seals 02/05 8 5. Check the alignment of the seal according figure 3.1; Fig. 3.1: Checking the alignment Measurements must be taken in horizontal and vertical direction. The maximum allowed difference in measurement A – B depends of the size on the SUPREME seal, according table 3.1. SUPREME size Maximum allowed difference measurements A1 – B1 and A2 – B2 155 t/m 300 0,35 mm 330 t/m 500 0,40 mm 530 t/m 710 0,45 mm 750 t/m 900 0,50 mm Table 3.1 6. Check the built-in length according figure 3.2; Fig. 3.2: Checking the built-in length The built-in length depends on the size of the SUPREME stern tube seal and is shown at the assembly drawing.
  9. 9. IHC LAGERSMIT Installation and maintenance instructions SUPREME® stern tube seals 02/05 9 7. Check the run-out of the liner according figure 3.3 Fig. 3.3: Checking the run-out The maximum allowed shaft movement depends on the size of the SUPREME seal. The next table shows the maximum allowed clock gauge deflections: SUPREME size Maximum allowed clock gauge deflection 155 t/m 300 0,09 mm 330 t/m 500 0,12 mm 530 t/m 900 0,15 mm Table 3.2: Maximum allowed clock gauge deflections 8. Fasten and secure the bolts. Table 3.3 shows the torque moments. The bolts need to be redrawed after fitting. The bolts have to be secured with the help of securing wire according figure 3.4. Bolt Torque moment Aft seal Torque moment Forward seal M8 20 [Nm] 22 [Nm] M10 45 [Nm] 44 [Nm] M12 75 [Nm] 74 [Nm] M16 120 [Nm] 165 [Nm] M20 205 [Nm] 314 [Nm] M24 354 [Nm] 549 [Nm] Table 3.3 : Torque moments
  10. 10. IHC LAGERSMIT Installation and maintenance instructions SUPREME® stern tube seals 02/05 10 Additional instructions for SUPREME 2/2 aft seals: Bolts have to be tightened uniformly and in order 1 – 2 – 3 – … as shown in figure 3.4. Figure 3.4: * Tightening order (seen against the flange of a liner 2/2) * Way of securing 3.2 Zero wear down measurement The wear down of the aft bearing bush can be determinated without removing the aft seal by carrying out a zero wear down measurement. This measurement has to be carried out before launch. The value has to be recorded at the wear down protocol attached in this manual. This measurement has to be carried out regularly, e.g. at dry-dockings. By comparing the values to the zero wear down value, it can be determined whether the bearing clearance is still acceptable.
  11. 11. IHC LAGERSMIT Installation and maintenance instructions SUPREME® stern tube seals 02/05 11 Carrying out the zero wear down measurement: The bearing wear down is to be determined with the use of the vernier callipers and the measuring plug as shown in figure 3.5. Figure 3.5: Zero wear down measurement 1. Put the propeller blade #1 at TOP position; 2. Remove the plug and sealing ring from the end supporting ring; 3. Screw the measuring plug into the thread hole; 4. Determine dimension A with the use of the vernier callipers; 5. Write down the measured value at the wear down protocol; 6. Remove the measuring plug and replace the sealing ring and plug. Use a new sealing ring after each wear down measurement! 3.3 Installing the stern tube forward seal The SUPREME forward seal is delivered completely assembled, including brackets. In order to prevent damage to the liner as well as the lip seals, the complete seal must slid onto the propeller shaft as a unit, including the brackets. The shaft may not be driven when work is carried out on the seal. The brackets are not suitable for lifting purposes.
  12. 12. IHC LAGERSMIT Installation and maintenance instructions SUPREME® stern tube seals 02/05 12 Installing: 1. Take the precautions written at page 7 of this manual; 2. Oil the shaft; 3. Slid the complete stern tube seal, including the gasket, brackets and O-ring onto the shaft; 4. Fit the seal against the stern tube; Mind the correct position of the gasket and the bleed plug. With respect to the alignment do not fasten the bolts of the flange ring yet. 5. Couple the propeller shaft; 6. Remove the brackets; If the brackets are not removed the installation will cause damage when the seal is put into operation. The brackets do not prescribe the built-in length. 7. Adjust and mount the clamping ring onto the propeller shaft; The adjusting size is given in table 3.4. Adjusting size [mm] Adjusting size [mm] Adjusting size [mm] SUPREME Size Min. Max. SUPREME Size Min. Max. SUPREME Size Min. Max. 155 to 190 57 67 355 to 380 79 89 670 130 145 200 to 220 62 72 400 to 500 84 99 710 to 750 120 135 240 to 260 67 77 530 89 104 800 to 850 123 138 280 69 79 560 to 600 90 105 900 138 153 300 to 330 74 84 630 105 120 950 to 1000 148 163 Table 3.4: Adjusting sizes
  13. 13. IHC LAGERSMIT Installation and maintenance instructions SUPREME® stern tube seals 02/05 13 With respect to the possibility to shove the liner aside to the stern tube the maximum adjusting size should be realized at new- building. 8. Fit the liner against the clamping ring; 9. Check the alignment and run-out of the liner; See paragraph 3.1 (instructions 5 and 7) 10. Fasten the bolts; See table 3.3 for the required torque moments 11. Fit and connect the lubrication tank according to the drawing attached in this manual (if applicable); At all times the seals must be protected against grinding dust and/or welding spatter. Wrapping of the seals for example with fibreglass cloths is recommended by IHC Lagersmit.
  14. 14. IHC LAGERSMIT Installation and maintenance instructions SUPREME® stern tube seals 02/05 14 4. PUTTING INTO OPERATION For putting the propulsion installation into operation see the concerned manuals of the supplier(s) of the propulsion installation. As for the stern tube seals and bearings the next actions must be taken: 1. Filling the stern tube and stern tube tank; 2. Filling the circulation tank of the forward seal; 3. Filling the additional lubrication oil tank(s). (if applicable) Observe the safety and environmental rules when filling the tanks. 4.1 Filling the stern tube and stern tube tank The stern tube and stern tube tank should be filled with lubrication oil* up to the maximum level. To prevent pressure increase the stern tube must be aerated continuously. 4.2 Filling the circulation tank of the forward seal The next actions must be taken: 1. Remove the filler plug of the circulation tank; 2. Fill the circulation tank with lubrication oil*; The circulation tank should be filled up to the upper sight glass 3. Fit the filler plug. 4.3 Filling the additional tank(s) (if applicable) The next actions must be taken: 1. Open the valve between the additional tank and the aft seal; 2. Remove the bleed plug of the aft seal; 3. Remove the filler plug of the additional tank; * For oil specifications see paragraph 4.4
  15. 15. IHC LAGERSMIT Installation and maintenance instructions SUPREME® stern tube seals 02/05 15 4. Fill the additional tank with lubrication oil; The additional tank should be filled up until the oil is coming out of the bleed hole of the aft seal. Because there is no counter pressure the water repellent seals may loose some oil. For oil specifications see paragraph 4.4. 5. Fit the bleed plug; 6. Close the valve; (see the lubrication scheme in the enclosure) The valve must be opened after launch. 7. Fit the filler plug. 4.4 Oil specifications Mineral lubrication oil can be used, provided it is compatible with the next properties: - ISO VG 68 … ISO VG 320; - Temperature range: -20 … 120 °C. Often lubrication oil class SAE 30 / 40 is used. The lubrication oil may not be polluted. When the use of specific oil, for example biological-oil, is desired, please contact the oil supplier concerned. The installation is ready for start-up after removing the protection cloths of the seal. Keep one’s distance to the shaft during start-up!
  16. 16. IHC LAGERSMIT Installation and maintenance instructions SUPREME® stern tube seals 02/05 16 5. MAINTANANCE / REPAIRS The following inspections / actions should be taken periodically: Periodical Act Weekly Checking the oil levels (5.1) Half-yearly Refreshing the lub. oil in the circulation tank of the forward seal Each docking Measuring the wear down (5.2) Removing the distance ring (if fitted) (5.3.1.1) Machining the liner (5.3.1.2) Overhaul of the aft seal (5.3.1) Shortening and fitting the springs of the lip seals (5.3.1.3) Points of interest at overhaul Overhaul of the forward seal (5.3.2) 5.1 Weekly maintenance Checking the oil level: At normal operation conditions seals will have little oil consumption. This consumption depends on a large amount of factors. For instance the size, peripheral velocity, misalignment, viscosity of the oil, temperature and conditions of the lip seals/liner have a great influence. Weekly the oil levels in the circulation tank of the forward seal, the stern tube tank and additional oil tanks need to be checked and filled if necessary. 5.2 Each docking Measuring the wear down: Before starting the work the bearing bush wear down needs to be measured. The way of measuring is the same as the zero wear down measurement as described in paragraph 3.2. For the maximum allowed bearing clearance contact the concerned classification society. After the work the zero wear down measurement needs to be redone. 5.3 Points of interest at overhaul The lip seals can be replaced without removing the propeller or withdrawing the propeller shaft. Gluing the lip seals in situ can only be done if the stern tube is free of oil. In the event of repairs IHC Lagersmit recommends to renew the lip seals and other “soft” materials like rubber rings and gaskets. Overhauling SUPREME seals demands specialistic skills / tools and therefore needs to be done by a service engineer of IHC Lagersmit or by a service engineer of a recognized by IHC Lagersmit service station
  17. 17. IHC LAGERSMIT Installation and maintenance instructions SUPREME® stern tube seals 02/05 17 5.3.1 Overhaul of the aft seal In the event of running spurs at the liner there are several options: 5.3.1.1 Removing the distance ring (if fitted) After removing the distance ring the housing of the aft seal can be shoved aside to the stern tube. This way new running surfaces are achieved for the lip seals. 5.3.1.2 Machining the liner When the distance ring has been removed earlier (5.3.1.1) the running surface of the liner can be turned and/or ground down. The finish should be pitch free. The roughness (Ra) must be between 0.2 and 0.8 µm. The spring of the lip seal which will run on a machined down surface should be shortened according 5.3.1.3 Figure 5.1: Machining the liner Table 5.1 shows the maximum diameter reduction and the shortened spring length by 1 mm diameter reduction: SUPREME size (Dnominal) Pmax (Max. diam. reduction) Shortened spring length by 1 mm diameter reduction (see 5.3.1.3) 155 t/m 200 1,5 mm 20 mm 220 t/m 240 1,6 mm 25 mm 260 t/m 280 1,6 mm 30 mm 300 t/m 355 1,6 mm 35 mm 380 t/m 450 1,7 mm 40 mm 480 t/m 530 1,8 mm 45 mm 560 t/m 600 1,9 mm 50 mm 630 t/m 710 2,0 mm 55 mm 750 t/m 800 2,1 mm 60 mm 850 t/m 900 2,1 mm 65 mm Table 5.1: Maximum diameter reduction / Shortened spring length by 1 mm diameter reduction. Example: The running surface diameter of a liner size 420 is machined with 1.3 mm to Ø 418.7 mm. This means that the spring must be shortened to: 1.3 * 40 = 52 mm.
  18. 18. IHC LAGERSMIT Installation and maintenance instructions SUPREME® stern tube seals 02/05 18 5.3.1.3 Shortening the springs of the lip seal The springs of the lip seals can be shortened: 1. Remove the spring; Screw the spring ends loose by turning the conical spring end left. 2. Shorten the spring; See table 5.1. for the right length. NOTE: Do not cut off the conical spring end. 3. Make the spring connection; Turn the conical spring end to the right into the other spring end. 4. Fit the spring on the lip seal. 5.3.2. Overhaul of the forward seal; Putting the ship into dock is not always necessary for overhauling the forward seal. Before such overhaul can take place be ensured the aft seal is watertight.
  19. 19. IHC LAGERSMIT Installation and maintenance instructions SUPREME® stern tube seals 02/05 19 6. OPTIONAL EXTRAS To extend the life of the stern tube seal the SUPREME seal can be fitted with a variety of optional extras. 1 Rubber material The lip seals can be made from heat resistant and stable FPM (Viton® ) rubber in situations of heavy loads. 6 Springs The lip seals can be fitted with Hastelloy® springs. These are better resistant to corrosion than the standard used stainless steel springs. 2 Wire winder Fitting a stainless steel split (2/2) wire winder prevents thin (fishing) lines being wound onto the liner. 7 Wear resistant surface A ceramic or hard metal layer can be applied to the liner. This reduces the wear and tear of the lip seals in the liner. 3 Net cutters Stainless steel net cutters can be fitted on the rope guard over the overlapping part on the propeller hub. 8 Static sealing Fixed propellers can be exchanged without loss of lubrication oil form the stern tube, if an O-ring is present between the liner and the propeller shaft. 4 Cathodic protection Fitting a sacrificial anode to the liner itself offers maximum resistance to corrosion of the liner. 5 Dirt barrier The ingress of sand particles and other foreign matter can be avoided by using a dirt barrier. This rubber dirt barrier is clamped onto the liner using 2 taut stainless steel springs. 9 Distance ring The SUPREME in its standard design can be fitted with a divisible distance ring. This extends the life of the aft seal. Removal of this ring enables the housing to be removed in relation to the liner with the result that new sealing surfaces are created for new rubber lip seals. The spacer ring in fully split execution (2/2) can also be supplied.
  20. 20. IHC LAGERSMIT Installation and maintenance instructions SUPREME® stern tube seals 02/05 20 WEAR DOWN PROTOCOL
  21. 21. IHC LAGERSMIT Installation and maintenance instructions SUPREME® stern tube seals 02/05 21 SPARE PARTS / SERVICE To ensure that the correct parts are supplied the following information must be provided on the order: 1. The information on the data sheet on page 2 of this manual; 2. Description of the required parts; 3. Part number and/or code number of the required parts; 4. Quantity, desired delivery time and sending information of the required parts. Besides the required information for ordering spare parts the following information should be provided for ordering a service engineer: 1. Place of docking; 2. Desired starting date. Orders for spare parts and /or service engineer should be addressed to: IHC Lagersmit BV P.O. Box 5 2960 AA KINDERDIJK Holland Telephone : +31 (0) 78 69 10 472 Service telephone : +31 (0) 6 539 35 653 (24 h accessible) Telefax : +31 (0) 78 69 10 477 E-mail : info@ihclagersmit.com Website : www.ihclagersmit.com
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