DK202200009U3 - A liftable oil change system for oil change of high viscosity gear oil for an offshore wind turbine and a kit for lifting the liftable oil change system - Google Patents

Abstract

A liftable oil change system (100) for offshore oil change, wherein the liftable oil change system (100) comprises - an oil tank (110) comprising an oil tank bottom (112) with a tank outlet (114) for supplying oil; - a frame (120) comprising a frame top (122) and a frame bottom (124) separated by beams, where the oil tank (110) is placed between the frame top (122) and the frame bottom (124); - the frame top (122) is arranged to interact with an upper traverse of a lifting yoke (1); and - the frame base (124) is designed with channels (126) designed to receive lifting forks of a lifting yoke (1).

Description

DK 202200009 U3 1

A liftable oil change system for oil change of high viscosity gear oil for an offshore wind turbine and a kit for lifting the liftable oil change system

The field of creation

The purpose of the invention is to deliver a liftable oil change system for changing the oil of an offshore wind turbine in an easy and reliable way, with which operating costs are reduced.

The background of the creation

Today it is difficult to change the oil on offshore wind turbines/offshore wind turbines, this is partly due to the fact that an oil tank must be moved from a ship to offshore wind turbines, while the ship moves relative to the offshore wind turbine. There is a relatively high risk that the oil tank may receive an impact during the move, and therefore the oil tank must comply with a number of safety approvals.

This will typically make the oil tank large and heavy to make it suitably robust. However, this robustness is only relevant during the actual lifting from the ship to the offshore wind turbine, during the rest of the transport the oil tank is just unnecessarily heavy.

Today, the gear oil in offshore wind turbines is most often changed by transporting a majority of smaller tanks up into the nacelle, and the majority of smaller tanks must subsequently be transported down again. It takes a long time, and it is neither environmentally nor safety sound. There is therefore a need for a new solution which is both environmentally and safety sound.

However, the whole thing is considerably complicated by the fact that the viscosity of the oil is extremely temperature dependent. A typical gear oil for offshore wind turbines has a viscosity of around 320 cSt at 40 degrees Celsius, but viscosity can be 800 cSt at 20 degrees Celsius and even greater at lower temperatures. There are offshore wind turbines in both arctic and subtropical areas. A workable solution should ideally be able to be used in both arctic and subtropical areas.

The above problems only get bigger as the offshore wind turbines grow in size, the offshore wind turbines are placed in more and more extreme areas.

DK 202200009 U3 2

It has been proposed to pump the oil from a platform at the offshore wind turbine into the nacelle. However, it has proven extremely difficult to avoid the formation of cavitation in the pumps which must pump the oil, eg the gear oil, up to the nacelle. In addition, there are very special requirements for moving an oil tank from a ship to a platform at an offshore wind turbine.

The purpose of the creation

The purpose of production is to deliver a liftable oil change system which is optimized for the various stages of an oil change, e.g. transport by ship, lifting from ship to platform at offshore wind turbines and the oil change itself.

Description of the production

The purpose of the invention is to provide a liftable oil change system for oil changes at an offshore wind turbine. Where the liftable oil change system comprises - an oil tank comprising an oil tank bottom with a tank outlet for supplying oil; - a frame comprising a frame top and a frame bottom separated by beams, where the oil tank is located between the frame top and the frame bottom; - the frame top is adapted to interact with an upper traverse of a lifting yoke; and - the frame base is designed with channels designed to receive lifting forks of a lifting yoke.

The frame with associated channels is arranged to interact with a lifting yoke so that the oil change system and the lifting yoke can be lifted by a crane from a ship to a platform on an offshore wind turbine.

The tank outlet is designed to be connected to an oil exchange system at the offshore wind turbine, which oil exchange system includes, among other things, a pump to pump the oil up to the nacelle.

Since the oil change system is designed to work together with a lifting yoke, the frame itself can be made so that the oil change system alone does not comply with the IMO — International Marine Organization — for transport tanks, but that the oil change system together

DK 202200009 U3 3 but with a lifting yoke complies with the following standard DNV-ST-E273 2.7-3 — Portable off-shore units. This means that the frame can be made using less material, as the requirements for the lift itself are moved to the lifting yoke.

In one embodiment, the frame may be box-shaped. The box shape makes it easier to handle the oil change system and to place the lift.

In one embodiment, the frame may include a plurality of eyelets for attaching the liftable oil change system to a ship. In this way, the liftable oil change system can be attached to the ship during transport to an offshore wind turbine.

In one embodiment, the tank outlet can be located at one end of the oil tank, and where the oil tank is located in the frame with a slope towards the end of the oil tank with the tank outlet. This ensures that the oil tank can be emptied of oil without the frame itself having to stand at an angle.

In one embodiment, the oil tank may include a tank inlet for pressurizing the oil tank.

During use, the tank inlet will be connected to a pump or similar which can create an increased pressure in the tank of up to +0.5 bar compared to the atmosphere.

During use, a pump will be connected to the tank outlet, if the oil tank does not have an increased pressure, then there is a risk of cavitation at or in the pump. This can damage the pump and the amount of oil delivered to the wind turbine will be less than planned.

The possibility of increasing the pressure in the tank thus increases operational reliability and reduces wear.

The oil tank can also be equipped with a pressure gauge.

In one embodiment, the oil tank can be double-walled with insulation between the two walls.

This increases safety and the oil tank becomes less sensitive to temperature fluctuations and/or cold weather.

DK 202200009 U3 4

The insulation can be 30-60 mm thick, e.g. 40 mm thick.

In one embodiment, the oil tank may include a temperature sensor for measuring the temperature of the oil, and one or more heaters for heating the oil in the tank to 40 to 50 degrees Celsius.

The oil supplied to an offshore wind turbine must be 40 to 50 degrees Celsius. The fact that the liftable oil change system heats up the oil before the oil is delivered simplifies the delivery of the oil to the wind turbine. There is thus no need for additional elements for heating. Here it is an additional advantage if the oil tank is double-walled with insulation between the two walls, as previously described. The production can therefore be used in both arctic and subtropical areas.

In one embodiment, the liftable oil change system can include between the frame base and the oil tank a spill tray for collecting oil. If a leak should occur, it will be collected by the spill tray.

It is the purpose of the invention to provide a kit comprising a lifting system for a crane, preferably in the offshore industry, which provides a high degree of safety when lifting oil change systems, where the lifting system has a low weight and is simple to handle. This purpose is achieved with a lifting yoke for lifting the oil change system with a crane, as explained in more detail below.

It is the purpose of the invention to provide a kit for offshore oil change. Where the kit includes one or more liftable oil change systems and a complementary lifting yoke.

Where the lifting yoke can be used to lift the liftable oil change systems in shifts.

The lifting yoke is designed so that it becomes permissible to lift the liftable oil change system with a crane from a ship to an offshore wind turbine.

The lifting yoke comprises an upper traverse with two opposite end pieces, where from each end piece a beam extends downwards, so that when lifting an oil change system under the traverse, the two beams are placed on opposite sides of the oil change system. Every

DK 202200009 U3 beam has a lower end where a lifting fork is attached for introducing 1 the channels of the oil change system. The lifting forks are opposite and point towards each other to engage under opposite sides of the oil change system. 5 Advantageously, the traverse and/or the beams are adjustable in length to adapt the lifting yoke to the dimensions of the oil change system.

In a concrete embodiment, the traverse and/or the beams are adjustable in length by being provided with a first part and a second part which are in contact with each other and engage each other, for example telescopically. For example, the parts are provided as pipe profiles, H profiles, L profiles or U profiles or combinations thereof, for example a combination of an H profile with an L profile or U profile, which is inserted into one side of The H profile. The length of the traverse and/or the beams is adjusted by mutual displacement of the two respective parts in their longitudinal direction relative to each other.

As an example, the two parts can slide as profiles against each other.

A locking mechanism is provided to lock for adjusting the length when manufacturing the locking mechanism. In a concrete embodiment, a number of holes are provided in the first and second parts, and the locking mechanism includes locking bolts that extend through the holes on both the first and second parts when the two parts are in contact with each other, thereby locking the two parts firmly in relation to each other by tightening the bolts.

Advantageously, the width of the lifting fork is also adjustable. For example, a bottom flange is attached to each beam, where two fork arms are attached or inserted in the transverse direction in extension or partial extension of each other, each of which holds one of two fork sections. The bottom flange, the fork arms and the fork sections together form the lifting fork, the width of which is adjustable in that the arms are mutually displaceable in relation to each other in their longitudinal direction, for example displaceable in the bottom flange, for example telescopically displaceable.

Advantageously, the length of the lifting fork is also adjustable. For example, the fork arms hold the fork sections by means of a corner bracket, in which the fork sections are offset

DK 202200009 U3 6 straight in their longitudinal direction in order to adjust the length of the lifting fork by this displacement of the fork sections in the corner bracket.

As an option, the lifting yoke is provided as an assembly set of profiles that make up the first and second parts of the traverse and of the beams. Apart from bolts and nuts, for example wing nuts, or other parts of locking mechanisms designed for this purpose, the assembly kit includes the following: - two traverse profiles each with a series of holes and bolts for interconnecting the two traverse profiles in several optional lengths of the traverse, - a lifting flange for attachment to the traverse, preferably designed for simultaneous mutual assembly of the lifting flange and the two traverse profiles, - at least two beams each with two beam profiles, each also provided with a number of holes for interconnecting the two beams - profiles with bolts in several optional lengths, - two fork sections for each beam, - a set of fork arms as a connection between the beams and the respective fork sections.

A kit, as described above, is advantageously provided on a ship with a crane. It can then be used to lift the oil change system from the ship to an offshore installation, for example to a platform of an offshore wind turbine.

Use of a liftable oil change system for oil change of high-viscosity gear oil for an offshore wind turbine, where the gear oil has a high viscosity of over 250 cSt at 40 degrees Celsius or over 300 cSt at 40 degrees Celsius.

In preferred embodiments, the kit is developed for certification according to the requirements of the International Maritime Dangerous Goods Code (IMDG) in the DNV 2.7-3 standard by Det Norske Veritas.

Drawing description

The production is described in more detail with reference to the drawing, where

Fig. 1-2 show a lifting yoke in different perspectives with 1) perspective towards the face of the lifting yoke, 2B) perspective towards the end and 2B) from above;

DK 202200009 U3 7

Fig. 3 shows two height settings and width settings with A) a minimum height and minimum width and B) a maximum height and maximum width;

Fig. 4-5 show a liftable oil change system for oil change at an offshore wind turbine; and

Fig. 6 shows a kit comprising a liftable oil change system and a liftable oil change system.

Detailed description of the production

FIG. 1-2 show a lifting yoke 1 in different perspectives with (figure 1) perspective towards the surface of the lifting yoke, (figure 2A) perspective towards the end and (figure 2B) from above. The dimensions are given as an advantageous example and may differ from those given.

The lifting yoke 1 comprises an upper length-adjustable traverse 2, which has opposite ends 7a, 7b. At each end 7a, 7b, a length-adjustable beam 3a, 3b is attached at a right angle, which extends downwards and which has a lifting fork 4a, 4b attached at its lower end to engage under goods, for example a pallet, a box or a tank. A lifting device on the traverse 2 is exemplified as a central lifting flange 8 with a lifting eye 9 for lifting with a rope, a chain or a hook.

The traverse 2 is two-part with a first part 2a and a second part 2b, which can be displaced relative to each other for longitudinal adjustment of the traverse 2. The two parts 2a, 2b of the traverse 2 are, for example, provided as metal profiles or polymer profiles that engage in each other, so that they can be displaced lengthwise and in contact with each other, for example slide telescopically in relation to each other. Examples are pipe profiles, H profiles, L profiles or U profiles or combinations thereof, for example a combination of an H profile with a

L-profile or U-profile, which is inserted into one side of the H-profile.

In order to lock the two traverse parts 2a, 2b against each other after an adjustment, a locking mechanism is provided, which is exemplified as through holes through which extend bolts that are typically locked with a nut. It is shown that two holes 11 are used, which not only go through the two parts 2a, 2b of the traverse 2 but also through the lifting flange 8. This implies that the two traverse parts 2a, 2b and the lifting flange 8 can be taken apart after disassembly of the two bolts 10. On the contrary, the traverse 2 can be easily assembled by bringing the two traverse parts 2a, 2b into contact with each other at different mutual positions and in partial extension of each other and by placing the lifting flange and inserting

DK 202200009 U3 8 bolts 10 through the lifting flange 8, where each of the bolts 10 also extends both through the first traverse part 2a and the second traverse part 2b.

Each of the vertical beams 3a, 3b is similarly bisected and provided as beam sections 3a', 3a"", 3b', 3b"", for example made of metal profiles or polymer profiles, which engage each other, so that they can be displaced lengthwise and brought into contact with each other at different mutual positions and in partial extension of each other. Holes are also provided in each of the beam sections 3a', 3a", 3b', 3b", which are brought into overlap when mounting the beam sections 3a', 3a'', 3b', 3b", and bolts 10 are pushed through the overlapping holes 11.

In FIG. 3 two height settings and width settings are shown with a minimum height and minimum width in FIG. 3A and a maximum height and maximum width of i

FIG. 3B. Height and width can be adjusted independently of each other. The adjustment length is incremental and given by the mutual distance of subsequent holes along the profiles 2a, 2b, 3a', 3a"", 3b', 3b"". In the configuration shown, there are at least two holes 11 that overlap. However, there could be a requirement for at least one hole or at least three holes, which depends on the stability that is desired and depending on the stiffness of the material.

In the embodiment shown, the upper beam section 3a', 3b' is firmly connected to the traverse part 2a, 2b, which, however, is not strictly necessary, as they can be provided mutually demountable.

At the lower end of the vertical beams 3a, 3b, a lifting fork 4a, 4b is provided, which is exemplified by a bottom flange 12 transverse to the beam, in which a transverse arm 13 extending from the bottom flange is inserted at the opposite ends, which holds a fork section 14. Two opposing arms 13 are thus mounted on each bottom plate 12, each of which holds one of the two fork sections 14. Together, the two arms 13 and the fork sections 14 together with the bottom flange 12 form a lifting fork 4a, 4b for to grab under one side of goods, for example a pallet. The division of the lifting fork 4a, 4b into profiles, for example metal profiles that make up arm 13, fork section 14 and bottom plate 12, allows adjustment of both the width and the length of each lifting fork 4a, 4b. The lifting fork 4a, 4b can thus be easily adjusted to the right dimension and adapted to the type of goods.

DK 202200009 U3 9

As can be seen from the exemplified lifting yoke 1, this is assembled from profiles that can be easily dismantled and assembled. To facilitate assembly, wing nuts 15 have been used, for example, as illustrated in FIG. 2b. The simple principle also means that it can be easily transported, for example by shipment or transport on a ship, and assembled and adjusted in size at the place where there is a need to use it. A possible application is when lifting goods from a ship to a platform of an offshore wind turbine.

The embodiment shown with the dimensions indicated weighs about 50 kg when manufactured in aluminum and a thickness that can withstand the weight typically lifted by such cranes on board ships, for example 500 kg or 1000 kg. Typical objects that are moved from a ship onto platforms are pallets or tanks. Alternative materials instead of aluminum include polymers, especially fiber-reinforced polymers.

The lifting yoke can be separated into components that are packed together to take up less than a euro pallet size of 0.8 x 1.2 m.

Advantageously, the profiles are made of aluminium, especially saltwater-resistant aluminium.

The material thickness for aluminum is, for example, 5-6 mm.

In some embodiments, a square profile is used.

Fig. 4-5 show a liftable oil change system 100 for oil changes at an offshore wind turbine.

The liftable oil change system 100 comprises an oil tank 110, which oil tank 110 comprises an oil tank bottom 112 with a tank outlet 114 for supplying oil. The tank outlet 114 is arranged for connection with equipment at the offshore wind turbine, including a pump.

The tank outlet 114 itself is located at one end of the oil tank 110. The oil tank 110 is located in the frame 120 with a slope towards the end of the oil tank 110, which is equipped with the tank outlet 114.

The oil tank 110 also includes a tank inlet 116 for pressurizing the oil tank 110, which during use will have an increased pressure of up to +0.5 bar compared to atmospheric pressure to reduce the risk of cavitation in a pump that is connected to the oil change system 100.

DK 202200009 U3 10

The liftable oil change system 100 comprises a frame 120 comprising a frame top 122 and a frame bottom 124 separated by beams, where the oil tank 110 is located between the frame top 122 and the frame bottom 124. The frame top 122 is arranged to interact with an upper traverse of a lifting yoke 1, and the frame base 124 is designed with channels 126 adapted to receive lifting forks 14 of a lifting yoke 1, as shown in figures 1-3 and 6.

The frame 120 can be made of salt water resistant aluminum.

The liftable oil change system 110 comprises between the frame base 124 and the oil tank 110 a spill tray 130 for collecting oil in the event of an oil leak.

The frame 120 also includes a plurality of eyelets 121 for attaching the liftable oil change system 100 to a ship. In this embodiment, the eyes are located at the joints of the frame.

Fig. 6 shows a kit 200 comprising a liftable oil change system 100 and a lifting yoke 1. The figure shows how the channels 126 and the lifting forks 4a, 4b interact and how the upper traverse 2 interacts with the frame top 122 so that the liftable oil change system 100 is clamped.

Figure 6 shows only two channels and two lifting forks 4a, 4b, but the liftable oil change system 100 has in Figure 6 four channels 126, i.e. two on each side, and the lifting yoke has four lifting forks 4a, 4b which extend into the channels 126.

Claims (20)

DK 202200009 U3 11 UTILITY MODEL REQUIREMENTS 1. A liftable oil change system (100) for oil change of high viscosity gear oil for an offshore wind turbine, wherein the liftable oil change system (100) comprises - an oil tank (110) comprising an oil tank bottom (112) with a tank outlet (114) for supplying oil; - a frame (120) comprising a frame top (122) and a frame bottom (124) separated by beams, where the oil tank (110) is placed between the frame top (122) and the frame bottom (124); - the frame top (122) is adapted to interact with an upper traverse of a lifting yoke (1); and - the frame base (124) is designed with channels (126) designed to receive lifting forks of a lifting yoke (1). 2. A liftable oil change system (100) according to claim 1, wherein the frame (120) is box-shaped. 3. A liftable oil change system (100) according to claim 1 or 2, wherein the frame (120) contains a plurality of eyes (121) for attaching the liftable oil change system (100) to a ship. 4. A liftable oil change system (100) according to one or more of claims 1 to 3, where the tank outlet (114) is located at one end of the oil tank (110), and where the oil tank is located in the frame (120) with a slope towards the end of the oil tank (110) with the tank outlet (114). 5. A liftable oil change system (100) according to one or more of claims 1 to 4, wherein the oil tank (110) comprises a tank inlet (116) for pressurizing the oil tank (110). 6. A liftable oil change system (100) according to one or more of claims 1 to 5, where the oil tank (110) is double-walled with insulation between the two walls. 7. A liftable oil change system (100) according to one or more of claims 1 to 6, where the oil tank (110) comprises a temperature sensor for measuring the temperature of the oil, and one or more heaters for heating oil in the tank to 40 to 50 degrees Celsius. DK 202200009 U3 12 8. A liftable oil change system (100) according to one or more of claims 1 to 6, where the liftable oil change system (110) comprises between the frame base (124) and the oil tank (110) a spill tray (130) for collecting oil. 9, A kit (200) for offshore oil change, where the kit comprises one or more liftable oil change systems (100) according to claims 1-8 and a complementary lifting yoke (1). 10. A kit as described in claim 9, where the lifting yoke (1) comprises an upper traverse (2) with two opposite end pieces (7a, 7b), where a beam (3a, 3b) extends from each end piece (7a, 7b) ) downwards, so that the two beams (3a, 3b) when lifting the oil change system (100) under the traverse (2) are placed on opposite sides of the goods; wherein each beam (3a, 3b) has a lower end where a lifting fork (4a, 4b) is attached for insertion into the channels (124); wherein the lifting forks (4a, 4b) are opposed and point towards each other to engage under respective sides of the oil change system (100); where the traverse (2) and the beams (3a, 3b) are length adjustable to adapt the lifting yoke to the dimensions of the goods. 11. A kit according to claim 10, where the traverse (2) or the beams (3a, 3b) or both are provided with a first part and a second part (2a, 2b, 3a', 3a"", 3b', 3b ''), which are in contact with each other and engage each other and are adjustable in length by mutual displacement of the two respective parts in their longitudinal direction relative to each other; where a locking mechanism (10,11) is provided to lock for adjusting the length when the locking mechanism is manufactured. 12. A kit according to claim 11, where a series of holes (11) are provided in the first and second parts (2a, 2b, 3a', 34", 3b', 3b""), and where the locking mechanism comprises locking bolts ( 10) extending through the holes (11) on both the first and second parts (2a, 2b, 3a', 34", 3b', 3b''), when the two parts (2a, 2b, 3a', 3a', 3b', 3b'") are in abutment with each other, thereby locking the two parts (2a, 2b, 3a', 324", 3b', 3b"") solidly in relation to each other the. 13. A kit according to any one of claims 10 to 12, wherein the width of the lifting fork (4a, 4b) is also adjustable. DK 202200009 U3 13 14. A kit according to claim 13, where a bottom flange (12) is attached to each beam (3a, 3b), where two opposite fork arms (13) are attached or inserted in the transverse direction in extension or partially in extension , each of which holds one of two fork sections (14), so that the bottom flange (12), the fork arms (13) and the fork sections (14) together form the lifting fork (4a, 4b), whose width is adjustable by the fork arms (13) are mutually displaceable in relation to each other in their longitudinal direction, for example displaceable in the bottom flange (12). 15. A kit according to any one of the preceding claims 10-13, where the length of the lifting fork (4a, 4b) is also adjustable. 16. A lifting yoke according to claim 15, where the arms (13) hold the fork sections (14) by means of a corner bracket (16), in which the fork sections (14) are displaceable in their longitudinal direction by displacement of the fork sections (14) in the corner bracket (16) ) to adjust the length of the lifting fork (4a, 4b). 17. A kit according to any one of the previous claims 10-16, where the lifting yoke (1) is provided as an assembly set of profiles, comprising two traverse profiles (2a, 2b) each with a series of holes (11) and bolts (10) for interconnecting the two traverse profiles (2a, 2b) in several optional lengths of the traverse, a lifting flange (8) for attachment to the traverse (2), preferably designed with corresponding holes for simultaneous mutual assembly of the lifting flange and the two traverse profiles (2a, 2b) with the bolts (10), at least two beams (3a, 3b) each with two beam profiles (3a', 3a"", 3b', 3b"7), which are also each provided with a series of holes (11) for interconnecting the two beam profiles (2a, 2b) with bolts (11) in several optional lengths, two fork sections (14) for each beam (3a, 3b); a set of fork arms (13) as a connection between the beams (3a, 3b) and the respective fork sections (14). 18. A ship with a crane and a kit of any of the preceding claims 9-17. DK 202200009 U3 14 19. Use of a kit (1) according to any one of claims 8-17 for lifting one or more liftable oil change systems (100) from a ship to a platform of an offshore wind turbine. scythe. 20. Use of a liftable oil change system (100) for oil change of high viscosity gear oil for an offshore wind turbine, where the gear oil has a high viscosity of over 250 cSt at 40 degrees Celsius or over 300 cSt at 40 degrees Celsius.