NDM - Propeller Shaft Piller System

Propeller Shaft Puller Systems safer and cost effective inspection and repair

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www.ndm.no

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Since the foundation in 1989 Norwegian Deck Machinery has grown to be a well known supplier of equipment for the marine and offshore market.

Existing ways of doing operations can be improved by developing new and innovative equipment.

NDM has extensive experience in customized solutions.

Throughout the years we have delivered a range of products that just started out as an idea or a problem and turned out to be a complete turnkey product.

Our typical projects are purpose-built mechanical equipment and structures for marine or offshore operations and onshore equipment like shipyard equipment and equipment for general mechanical industry.

We take care of the total process from idea to concept development through design and manufacturing and all the way on to delivery, installation, start up, training and lifelong service.

Our experienced engineers solves the most complex problems and always aim to find the most cost effective solution for our customer without compromising on quality.

We possess all the technical expertise and associated documentation requirements needed to meet CEmarking, NORSOK, NS5820, DNV and others.

Extensive engineering expertise combined with high level of customer focus and quality management makes us a reliable and innovative partner.

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SAFER, FASTER and Cost effective INSPECTION & REPAIR

Advantages using propeller shaft puller systems compared to traditional methods Safer operations Less damage on shaft and propeller during the pulling operation. By using the propeller shaft puller system, the risk of damaging the shaft during the pulling operation is reduced to a minimum compared to doing it the traditional way with slings and shackles.

The shaft and propeller can be pulled out safely and quickly with high accuracy by continuously adjusting the support unit and puller unit from the control position.

Increased personnel safety and HSE Risk of personnel injuries during operation is reduced to a minimum since the entire operation is done with less personnel and without man driven hoist.

Faster Repair and Inspection The shipyard can reduce the time needed with up to 90% by using the propeller shaft puller system. The whole operation is normally done in just a few hours.

Cost saving for shipyard The traditional way with slings and shackles often takes several days and require double of personnel.

By using the propeller shaft puller system the hours and number of personnel are reduced to a minimum.

Cost saving for shipowner Reduced time in dock – reduced loss in off hire cost for the ship owner.

Other advantages • Can be delivered with equipment for taking down thrusters • Low maintenance • Easy to stow away • Quick and Easy to install before use • Easy to move from one dock to another • Short payment period on investment.

(Depending on activity at the repair yard.)

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special Products

STANDARD systeM 30 - 50T The standard propeller shaft puller system consists of a puller unit, a fork for taking down rudders and one ore more support units.

Depending on configuration, SWL is ranging from 30 – 50TSWL. All units are quickly installed and connected prior to a propeller shaft pulling operation. When not in use, the system is easily stowed away.

The puller unit and support unit(s) can be adjusted in vertical and horizontal direction and are easily operated from the control valves on the puller unit.

The puller system can be delivered with equipment for taking down thrusters.

Features Standard Model (30 – 50T SWL) • • • • • •

1 puller unit 1(2) support unit(s) 1 Fork for taking down rudders up to 6T 1 HPU 1 Control system Standard A75 railtrack (Customer supply)

Puller unit Lifting capacity: Driving length, standard: Working envelope, Vertical: Working envelope, Horizontal:

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20 T 20 m 1,5-4,0 m +/- 75 mm

Approx. power consumption: 20 kW, 400V/60Hz The propeller shaft puller system is operated by a fixed hydraulic control panel (station) placed on the propeller shaft puller unit.

The Propeller shaft puller unit and support units are quipped with lifting eyes placed in each corner for balanced lifting of the units on to the rail system.

Support unit: Load capacity: 20 T Working envelope, Vertical: 2,0–3,5 m Working envelope, Horizontal: +/- 200 mm

special equipment

SE Propeller Shaft Puller Unit Length of trolley

4865 mm

Width of trolley

2200 mm

Height of trolley (lowered)

2430 mm

Maximum lifting height

4000 mm

Total weight

4364 Kg

Distance between wheels:

2000 mm

Longitudinal

4500 mm

Width of rail track

2000 mm

Height from floor to center Front plate (lowered)

1500 mm

Max tilting of front plate

53,5 °

Sideway adjustment of front plate

± 150 mm

Max. Lifting capacity

20 tons

Max pulling force

4 tons

Travelling speed

0-9 m/min

Pull arrangement

Traction winch

Hydraulic system

HPU placed on Puller unit

Control system

1 off Control panel placed on HPU is included

Starter cabinet

1 off starter cabinet

Rails

Regular A75

Support Unit Length of trolley

1740 mm

Longitudinal

2200 mm

Width of trolley

2300 mm

Width of rail track

2000 mm

Height of trolley (lowered)

2100 mm

Working Envelope Vertical

2,0 -3,5m

Height of trolley (Lifted)

3600 mm

Working envelope Horizontal

± 200 mm

Total weight

2576 Kg

Max. Load capacity

20 tons

Distance between wheels:

1574 mm

Fork for taking down rudders Length

3370 mm

Width

1270 mm

Height

1541 mm

Total weight

730 Kg

Max Lifting Capacity

6 tons

The fork is mounted on the propeller unit.

Rail System (Customer supply) Rail type

Standard A75

Length

According to customer requirements

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special Products

LARGE system 50 - 80T For doing propeller shaft pulling operations on larger ships, NDM has developed a larger propeller shaft puller system consisting of a puller unit and two off combined support/rudder removal units suitable for taking down rudders up to 40T In addition the system can be delivered with equipment for taking down thrusters. Depending on configuration, SWL of the system is ranging from 50 – 80T SWL. All units are quickly installed and connected prior to a propeller shaft pulling operation. When not in use the system is easily stowed away.

The puller unit and support unit(s) can be adjusted in vertical and horizontal direction and are easily operated from the control valves on the puller unit.

Features Large System (50 – 80T SWL) • • • • •

1 puller unit 1 (2) support/rudder removal unit(s) 1 HPU 1 Control system A75 railtrack (Customer supply

Puller unit Lifting capacity: 30 T Driving length, standard: 26 m Working envelope, Vertical: 2,5 - 5,0m Working envelope, Horizontal: +/- 150mm

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Approx. power consumption: 20 kW, 400V/60Hz The propeller shaft puller system is operated by a fixed hydraulic control panel (station) placed on the propeller shaft puller unit.

The Propeller shaft puller unit and support/rudder units are quipped with lifting eyes placed in each corner for balanced lifting of the units on to the rail system.

Support unit: Load capacity: 30 T Working envelope, Vertical: 1,4 – 3m Working envelope, Horizontal: +/- 200mm

special equipment

SE Propeller Shaft Puller Unit Length of trolley

5364 mm

Width of trolley

3316 mm

Height of trolley (lowered)

2501 mm

Maximum lifting height

5031 mm

Total weight

8890 Kg

Distance between wheels:

Sideway adjustment of front plate

± 150 mm

Max. Lifting capacity

30 tons

Max pulling force

10 tons

Travelling speed

0-9 m/min

Hydraulic system

HPU placed on Puller unit

Longitudinal

4950 mm

Control system

1 off Control panel placed on HPU is included

Width of rail track

3000 mm

Starter cabinet

1 off starter cabinet

Height from floor to center : Front plate (lowered)

1500 mm

Rails

Regular A75

Max tilting of front plate

53,5 °

Support / Rudder Removal Unit This unit is designed to function as a support unit during the pulling operation, but by taking off the upper part, the unit can easily be transferred into a unit for taking down rudders up to 40 tons.

Important: Two off support units are needed in order to obtain stability during removal of rudders up to 40 Tons.

Length of trolley

1764 mm

Width of trolley

3420 mm

Height from rail to base of U frame (lifted)

1420 mm

Height from rail to shaft cradle In top position

3028 mm

Sideway adjustment of U frame

± 200 mm

Height of trolley (lowered)

3028 mm

Total weight

4221 Kg

Distance between wheels: Longitudinal

1100 mm

Max. Lifting capacity

30 tons

Width of rail track

3000 mm

Max pulling force

10 tons

Rudder fixation system

manually operated

Rudder Fixation Arms

4 off.

Number of Sections

2 Off

Length of front section

12500 mm

Length of front section

13525 mm

Width of each section

3480 mm

Height to top of rail

975 mm

Capacity

90T (metric)

Total Weight, front section

10043 kg

Total Weight, rear section

10336 kg

Rail type

A75

Height from rail to base of U frame (lowered) Height from rail to top of U frame (lowered)

420 mm 2500 mm

Large Rail System A larger rail system can be required to get the acquired height for operations. The large rail system is customer supply, and based on standard A75 rails. Drawings are included in NDM`s delivery.

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special Products

SYSTEM DESCRIPTION Both the standard and the large system are designed for rails and delivered with hydraulic driven units that are adjustable in horizontal and vertical direction.

The main difference is the total SWL and the way of removing the rudder prior to the pulling of the shaft.

The propeller shaft puller unit is the main part of both systems.

One or two support units completes the system depending on length of shafts. The rails are customer supply and length is made according to customer needs. The equipment can easily be stowed away when the job is finished.

The operator runs the entire operation from the control central on the propeller shaft puller unit. The shaft is pulled out safely and quickly without man driven hoist.

Preparation The rail track is set up as a prolongation of the propeller shaft axis - sufficiently beyond the propeller hub to make sure the front plate of the shaft puller can be brought in contact with the propeller hub.

The shaft puller is lifted on to the rails, connected, wire is tightened and the HPU is started. Support unit(s) can be placed on the rails now or later depending on operation.

Rudder removal The standard system is delivered with a fork for removal of rudders up to 6T. The fork is mounted on to the puller unit and the rudder is taken down by help of the lifting lugs on the fork and slings.

The rudder is lifted off and placed on the side until the operation is completed.

The large system has an integrated rudder removal function in the support units which can take down rudders up to 40T. Please note that two support units are needed for this operation The support units are locked to the rail, by using the rail clamps. The U-frame is lifted up until the rudder rests on it and the fixation arms are tightened up clamp the rudder to the U-frame.

When the rudder is disconnected from the rudder stock, the support units can be lowered to the bottom position before the operator takes them out in the crane coverage area.

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special equipment

SE

Shaft removal with the 20 T standard system

Shaft removal After the shaft puller is placed in position by operating the control valves, the propeller hub is strapped to the front plate.

When the shaft coupling is disconnected (between the propeller shaft and gearbox) the operator can start pulling the shaft outwards whilst constantly adjusting the boom height and front plate to keep the shaft in centre of the shaft bushing.

When the shaft has been brought out to an extent where support is needed the support unit is lifted. For longer shafts use two support units.

The entire process is reversed to put the shaft back in and the rudder back in place.

Thruster Removal NDM has developed equipment for taking out thrusters. The equipment is connected to the propeller shaft front plate using the same principle as the fork for taking down rudder.

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Photos: NDM, Shutterstock,

Norwegian Deck Machinery AS Ulvenvegen 34, N-5210 Os, Norway Phone: +47 56 30 32 80 Fax: +47 56 30 32 82 E-mail: office@ndm.no Web: www.ndm.no