KR101540394B1 - Non-contact power swivel capable of maintaining power transfer efficiency - Google Patents

Abstract

A non-contact power swivel capable of maintaining the power supply efficiency is disclosed. The non-contact type power swivel capable of maintaining the power supply efficiency according to the embodiment of the present invention is connected to the floating structure and is rotatable together with the floating structure, and the first coil part receiving the current from the power supply part disposed in the floating structure A current is induced by a magnetic field formed in the first coil part, and the induced current is supplied to the turret side, and the turret is connected to the turret relatively rotating with the floating structure, And a position adjusting device for adjusting a position of at least one of the first coil part, the second coil part and at least one of the first coil part and the second coil part to maintain the distance between the first coil part and the second coil part within a predetermined range can do.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a non-contact power swivel capable of maintaining power supply efficiency,

The present invention relates to a non-contact type power swivel capable of maintaining power supply efficiency.

Generally, a drill ship or FPSO (floating oil production and storage facility) drilling gas or crude oil from the seabed is equipped with a turret to assist drilling.

The turret is usually mounted in a vertical opening or moon pool at one end of the ship, usually at the forefront, and secured to the subsea well platform by a chain or the like, thereby mooring the vessel.

Further, the turret is installed so that the ship can rotate around the turret. In other words, the turret is fixed to the platform of the submarine channel, and a sliding bearing is interposed between the turret and the vertical opening (the portal) of the ship, so that the ship can rotate naturally around the turret by the action of wind, have. This allows the gas or crude oil to be stably transported to the ship side through a pipe or the like in the fixed turret, even if wind, tide or wave acts during the drilling operation.

The turret may be provided with a swivel stack including a plurality of swivels. Each swivel is placed vertically, like a tower, and the drilled gas or crude oil can be transferred to each part of the ship through this swivel stack. Each swivel is connected to the turret so that the inner side is fixed like a turret, and the outer side is connected with the hull so that it can rotate together with the ship when the ship rotates around the turret.

In general, a torque arm is connected to the outer side of the swivel, so that when the outer side of the swivel rotates together with the ship, the load is not transmitted to the piping connection site, so that the outer side of the swivel can rotate easily .

On the other hand, the turret may be equipped with a variety of equipment requiring power. For example, a winch, a lighting device, a thermal device, various sensors, and the like can be installed in each part of the turret, and a method of supplying electric power to them is required.

Currently, the slip-ring method is the most widely used. That is, by using a specific swivel of the swivel stack as a slip ring (or employing a slip ring for a specific swivel), the inner stator of the slip ring is connected to the turret, and the outer rotor of the slip ring is connected to the hull. When the ship rotates about the turret, the inner stator of the slip ring is fixed while the outer rotor can rotate around the inner stator. This allows the power applied to the external rotor to be transmitted to the internal stator and then to the various devices of the turret.

However, since the slip ring type power transmission method as described above transmits electric power by the physical contact between the inner stator and the outer rotor, when the ship rotates around the turret, it necessarily involves abrasion due to friction I can not help it. Therefore, periodic maintenance work is required to solve this problem. In addition, when the contact point between the rotor and the stator of the slip ring drops due to the instantaneous movement of the ship, there is a possibility that a spark occurs, and there is a high possibility that gas, vapor, and the like are present around the slip ring, .

US Patent Application Publication No. 7806708

An embodiment of the present invention is to provide a non-contact power swivel capable of supplying power to a turret in a non-contact manner.

The embodiments of the present invention are also intended to provide a non-contact power swivel which is free from the risk of abrasion or sparking due to friction.

Further, the embodiment of the present invention is to provide a non-contact type power swivel which is easy to maintain.

Further, an embodiment of the present invention is to provide a non-contact type power swivel capable of maintaining the power feeding efficiency.

The non-contact type power swivel capable of maintaining the power supply efficiency according to the embodiment of the present invention is a non-contact type power swivel capable of rotating together with the floating structure and connected to the floating structure, A current is induced by a magnetic field formed in the first coil part to supply the induced current to the turret side, And a position adjusting device for adjusting a position of at least one of the first coil part and the second coil part to maintain the distance between the first coil part and the second coil part within a predetermined range .

Further, the position adjusting device can be operated by inclining the second coil portion.

Further, the position adjusting device can be operated by moving the second coil part in the direction of the first coil part.

The position adjusting device may further include an elastic body that has one end and the other end connected to the second coil part and the floating structure to return the second coil part to the correct position when the second coil part is inclined have.

In addition, the elastic body may be provided in at least one pair, and each of the two elastic bodies included in the pair of elastic bodies may be arranged to be symmetrical with respect to the center of the second coil part, One elastic body may provide compressive restoring force to the second coil part and the other elastic body may provide tensile restoring force to the second coil part.

The position adjusting device may include an elastic pad interposed between the first coil part and the second coil part and contacting both the first coil part and the second coil part.

The position adjusting device may further include a pressure sensing body interposed between the first coil part and the second coil part to sense a change in pressure between the first coil part and the second coil part, A contact member which is interposed between a part of the first coil part and the second coil part and contacts both the first coil part and the second coil part, And a fluid control unit that supplies fluid to the contact member or discharges fluid contained in the contact member from the contact member when a change in pressure between the coil part is sensed.

The contact member may include a first contact member disposed at an upper portion of the space between the first coil portion and the second coil portion, and a second contact member disposed at a lower portion of the space between the first coil portion and the second coil portion. Wherein the pressure sensing body includes a first pressure sensing body for sensing a change in pressure acting on the first contact member and a second pressure sensing body for sensing a change in pressure acting on the second contact member, Wherein the fluid control unit includes a first fluid control unit connected to the first contact member and a second fluid control unit connected to the second contact member, The first fluid control unit supplies the fluid to the first contact member when the pressure acting on the first contact member and the pressure acting on the second contact member respectively increase and decrease in accordance with the inclination of the second fluid The control unit controls the second It is possible to discharge the fluid which is received in the tip member.

According to the embodiment of the present invention, it is possible to provide a non-contact type power swivel capable of supplying power to the turret in a non-contact manner.

Further, it is possible to provide a non-contact type power swivel which is free from the risk of abrasion or sparking due to friction.

Further, it is possible to provide a non-contact type power swivel which is easy to maintain.

Further, it is possible to provide a non-contact type power swivel capable of maintaining the power supply efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 schematically shows the construction of a general swivel stack; FIG.
2 is a view illustrating the inside and outside of the center of a non-contact type power swivel according to an embodiment of the present invention.
Figures 3 and 4 schematically illustrate a non-contact power swivel according to another embodiment of the present invention;
Figures 5 and 6 schematically illustrate a variant of Figure 3;
7 is a schematic view of a non-contact power swivel according to another embodiment of the present invention.
8 is a schematic illustration of a non-contact power swivel according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Hereinafter, a non-contact power swivel according to embodiments of the present invention will be described as being provided on a turret installed in a ship, but the present invention is not limited thereto. The non-contact power swivel according to embodiments of the present invention can be equally applied to various floating structures such as an offshore plant as well as a ship.

Further, the non-contact power swivel according to embodiments of the present invention may be disposed at the upper end of the swivel stack of the turret, or may be disposed at the middle portion rather than the upper end. In addition, the non-contact power swivel according to embodiments of the present invention may be located at a location other than the turret.

Before describing the present invention in more detail, the operation of the ship centered on the turret and the turret will be described.

Turrets may be equipped with floating structures that drill gas or crude oil from the seabed, such as drill rigs or FPSO (Floating Crude Oil Production Cargo Storage Facility). It may be divided into an internal turret or an external turret depending on where the hull is located.

The turret allows the ship to freely rotate about the turret when the ship flows by the action of wind, tide or wave while the gas or crude oil is being transported. The gas or crude oil, It can be stably transported to the ship side through the piping of the ship. For example, there is no possibility that various pipes such as a riser are caught by the flow of the ship.

In the case of an inner turret, a vertical opening (a portal) through the hull can be formed inside the vessel, and the turret can be installed in such a vertical opening. The vertical opening may be provided with a plurality of bearings such that the hull is rotatable about the turret. That is, the one side and the other side of each bearing can contact the hull and the turret, respectively, to perform rolling motion, thereby helping to smoothly implement the relative rotational movement of the hull and the turret.

The turret may comprise a bottom turret, an upper turret, a piping deck, a mezzanine deck, a gantry crane, and the like, in the above order from below. Gantry cranes are equipment for the unloading of drilled gas or crude oil. Swivel stacks and utility pipes connected to the gantry crane can be installed in the support structure of the gantry crane. Utility pipes can be supported by piping decks and mezzanine decks, one side can be connected to each part of the vessel and the drilled crude oil or gas can be transferred to each part of the vessel. The other side of the utility pipe can be connected to a riser installed in the turret. The riser is connected to a submarine block platform so that the gas or crude oil from the block can be transferred to the utility pipe through the riser.

1 is a view schematically showing the construction of a general swivel stack.

As shown, the swivel stack has a plurality of swivels arranged in the vertical direction. The bottom-most swivel may be a production swivel 10. It can receive crude oil or gas from a riser installed in the turret and transfer it to the hull via a utility pipe. Above the production swivel 10 there are a water injection swivel 20, a fire water swivel 30, a gas lift and injection swivel 40, a utility swivel 50, 60, Various swivels can be arranged. As such, each swivel included in the swivel stack performs its function and can safely transport crude oil or gas drilled from the seabed to the hull.

Meanwhile, as shown in FIG. 1, power is supplied to the turret including the swivel stack through the slip ring 70 in the conventional case. The slip ring 70 is typically disposed at the upper end of the swivel stack and is connected to the torque arm 71 connected to the hull 1 so that the outer rotor of the slip ring 70 can rotate with the ship, Because it is connected to the turret, it does not rotate with the ship when the ship rotates.

As described above, in such a slip ring type power supply structure, since the rotor and the stator of the slip ring 70 are in contact with each other, when the ship rotates around the turret, problems such as abrasion due to friction May occur. In addition, if the contact between the rotor and the stator is dropped due to the momentary movement of the ship, sparks may occur and a fire risk may occur. Therefore, as described below, a non-contact type power swivel capable of supplying power to the turret side without such a problem even when the ship rotates around the turret has been devised.

FIG. 2 is a view illustrating the inside and outside of the non-contact type power swivel 100 according to the embodiment of the present invention.

2, the non-contact type power swivel 100 according to the present embodiment includes two first coil portions 120 disposed at both sides of the second coil portion 120 with the second coil portion 120 at the center, However, the present invention is not limited thereto, and the first coil portion may be provided as one or more than three.

The first coil portion 110 is disposed on one side of the second coil portion 120 and may be spaced a predetermined distance from the second coil portion 120. The other first coil part 111 is also disposed on the other side of the second coil part and can be spaced apart from the second coil part 120 by a predetermined distance.

The first coil parts 110 and 111 may have a C-shaped cross-section, and the first coil 115 and 116 may be wound on the middle vertical member. In addition, the second coil part 120 may include a disc member at the upper and lower ends and a cylindrical member at the center, and the second coil 125 may be wound around the cylindrical member.

The first and second coils 115 and 116 and the second coil 125 wound on the first coil part 110 and the second coil part 120 respectively have through holes 135 formed in the first case 130 Through the through hole 145 formed in the second case 140 and the non-contact type power swivel 100, or may be discharged to the outside. The through holes 135 and 145 will be described later.

2, the cross-sectional shape of the first case 130 may be a cross-sectional shape, and the cross-sectional shape of the first cross-sectional shape may extend 360 degrees about the central portion of the non-contact type power swivel 100, A hollow portion may be formed inside and an upper portion may be opened. However, the center of the lower surface of the first case 130 may penetrate, and the second case 140 may be disposed at the penetrating portion as described later to support the second coil portion 120.

In this embodiment, the first case 130 having the above-described shape can support the lower end portion and the side portion of the first coil portion 110. For example, as shown in FIG. 2, a lower horizontal member of the first coil portion 110 of the C shape can be supported from below, and a central vertical member of the C shape first coil portion 110 And can be supported from the outside to the inside of the non-contact power swivel 100.

Since the first coil 115 can be wound on the center vertical member of the first coil part 110, the part where the first coil 115 is wound on the first coil part 110 can be wound around the first case 130 You may not touch them directly. In this case, one ends of a plurality of insulators (not shown) are connected to a plurality of points of the first coil part 110, respectively, and the other ends of the plurality of insulators are connected to inner surfaces of the first case 130 The first coil part 110 can be completely supported by the first case 130 and can be fixed to the corresponding position and can not be moved even during the rotation operation.

The first case 130 is in direct contact with the lower end of the first coil part 110 to support the first coil part 110. However, An insulator may be interposed between the cases 130 as well.

The second case 140 can support the second coil part 120. In this embodiment, the second coil part 120 is disposed at the center of the non-contact type power swivel 100, 140 may form a lower center portion of the non-contact type power swivel 100.

The second case 140 is embodied as a disk in this embodiment and can act to support the lower end of the second coil part 120 from below. An insulator may be interposed between the second coil part 120 and the second case 140, as in the case of the first coil part 110 and the first case 130.

Meanwhile, other swivels of the swivel stack may be positioned under the first case 130 and the second case 140, and an upper turret, a lower turret, and the like may be disposed below the other swivels. As will be described later, the first case 130 is connected to the hull so that the first case 130 can rotate together with the ship when the ship rotates about the turret. The second case 140 may be connected to the turret so that the second case 140 may not rotate as the turret rotates about the turret.

The cover 150 may be a disc. The cover 150 may cover the upper end of the first coil part 110 and the second coil part 120 after the first coil part 110 and the second coil part 120 are disposed in the non-contact type power swivel 100. [ The cover 150 and the first coil part 110 may be spaced apart from each other by an insulator interposed between the cover 150 and the upper end of the first coil part 110. Meanwhile, in the present embodiment, the upper end of the second coil part 120 may be spaced apart from the cover 150 by a predetermined distance.

On the other hand, the non-contact power swivel 100 may be located at the top (or top) of the swivel stack. However, the present invention is not limited thereto, and other swivels may be arranged above the non-contact type power swivel 100. [ Accordingly, the upper surface of the cover 150 can be connected to another swivel. Further, as will be described later, the cover 150 is connected to the hull so that it can rotate together with the ship when the hull rotates about the turret.

Referring to FIG. 2, it can be seen that the lower end of the first case 130 and the end of the second case 140 are not in direct contact with each other. As mentioned above, the first case 130 and the cover 150 are connected to the hull so as to rotate together with the ship, while the second case 140 does not rotate together with the ship. Accordingly, the first case 130 and the second case 140 can rotate relative to each other. In order to smoothly support the first case 130 and the second case 140, the lower end of the first case 130 and the end of the second case 140 A bearing portion 170 may be disposed between the first and second bearings.

The bearing portion 170 may support the relative rotation of the first case 140 and the second case 150.

Hereinafter, an operation of the non-contact type power swivel 100 according to the present embodiment will be described.

The power supply unit 1000 disposed on the ship can apply current to the first coil part 110, more specifically, the first coil 115 of the first coil part 110. [ The current flowing along the first coil 115 wound on the first coil part 110 can form a magnetic field on the first coil part 110 and the second coil part 115 disposed adjacent to the first coil part 110, A magnetic field in a direction opposite to the magnetic field formed in the first coil part 110 may be induced in the part 120. [ According to the induced magnetic field, a current can be induced to flow through the second coil 125 of the second coil part 120. [ The current induced in the second coil 125 can be used to operate various turret loads 2000 (e.g., winches, illuminators, heaters, sensors, etc.) supplied to the turret side and located in the turret.

On the other hand, when the ship rotates about the turret, since the first coil part 110 is connected to the ship, it rotates together with the ship. On the other hand, since the second coil part 120 is connected to the turret, It is fixed without rotating together. That is, the first coil part 110 and the second coil part 120 can also rotate relative to each other, and if the first coil part 110 and the second coil part 120 are rotated according to the present embodiment, The current can be induced in the second coil part 120. Therefore, unlike the conventional slip ring, even when the ship rotates, there is no possibility of causing problems such as abrasion due to friction between the rotor and the stator. As a result, the rotor and the stator are not in contact with each other, so there is no possibility of sparking due to the momentary disconnection of the rotor and the stator.

The inner space 180 of the non-contact type power swivel 100 partitioned by the first case 130, the second case 140, the bearing part 170, and the cover 150 may be filled with insulating oil. The first coil portion 110 and the second coil portion 120 can be kept apart from each other by a predetermined distance by the insulating oil.

As described above, a plurality of through holes 135 and 145 may be formed in the first case 130 and the second case 140, respectively. The through holes 135 and 145 may provide a passage through which the first coil 115 and the second coil 125 are drawn into or out of the non-contact type power swivel 100. The through holes 135 and 145 are formed in the first case 130 and the second case 140 so that both ends of the first coil 115 and the second coil 125 can be separately inserted and discharged, Respectively.

The through holes 135 and 145 may be separated from the first coil 115 or the second coil 125 by a separate sealing member. For example, it is possible to prevent the access of various flammable substances and moisture which may cause a fire, thereby improving the operational stability. In addition, when the inner space of the non-contact type power swivel 100 is filled with the insulating oil, it may prevent the leakage of the insulating oil.

Hereinafter, a situation will be described in which the first coil portion and the second coil portion are inclined at a predetermined angle with respect to each other, or horizontally closer to or away from each other. The turret is fixed to the bottom of the underwater hole and can be supported by the bearing part installed in the vertical opening of the ship. However, the turret can be tilted at a certain angle with respect to the ship by the effect of instantaneous winds and waves. In addition, one side of the turret may be close to the hull, or vice versa.

In this way, when the turret is inclined or the turret and the hull are brought close to each other, the second coil portion connected to the turret also tilts together or comes close to the hull. In this state, the distance between the first coil portion and the second coil portion is changed The efficiency of power supply can be reduced. In a severe case, the first coil part and the second coil part may be in contact with each other, which may cause problems as in the prior art.

In the following description, it is assumed that the second coil portion is inclined with respect to the first coil portion. However, the present invention is not limited thereto, and the first coil portion may be inclined with respect to the second coil portion. The present invention is equally applicable. For example, while the turret is fixed to a submarine block platform, the vessel can be instantaneously tilted with respect to the turret by the action of wind or wave.

When a relative tilting occurs between the first coil part and the second coil part or when the first coil part and the second coil part approach each other so as to have a smaller distance than the predefined spacing distance, And a position adjusting device for returning the first coil part or the second coil part to the correct position. Therefore, it is possible to prevent relative inclination and approach between the first coil part and the second coil part which can occur instantaneously by the action of wind or wave.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 3 to 8, other elements such as the first and second cases, the cover and the like are omitted in order to clearly show the tilting relationship or the approach relation of the first coil part and the second coil part, A coil part, a second coil part and a position adjusting device.

3 and 4 are views schematically showing a non-contact type power swivel 200 according to another embodiment of the present invention. In this embodiment, the tilting of the second coil part 220 can be prevented by using the restoring force of the elastic body. In other words, when the second coil part 220 tends to tilt through the elastic body between the second coil part 220 and the hull, the elastic body acts to restrain the second coil part 220, 220 to return to the home position.

Referring to FIG. 3, it can be seen that the second coil part 220 tilts in a counterclockwise direction. In this embodiment, the pair of elastic members 290 and 291 may be interposed between the cover 150 and the upper surface of the second coil part 220. Specifically, one end and the other end of each of the pair of elastic members 290 and 291 may be connected to the upper surface of the cover 250 and the upper surface of the second coil portion 220, respectively. The pair of elastic members 290 and 291 may be arranged to be symmetrical with respect to the center of the second coil part 220.

3, the elastic body 290 connected to the left side (left side with respect to the center) of the upper surface of the second coil part 220 is compressed, and the length of the second coil part 220 The compressive restoring force of the second coil part 220 in the left arrow direction can be provided. The elastic body 291 connected to the right side of the upper surface of the second coil portion 220 (right side with respect to the center portion) is elongated and can be extended in length so that the right side of the second coil portion 220 Can provide the tensile restoring force.

As the elastic member 290 on the left side pushes the second coil portion 220 in the direction opposite to the tilting direction and the elastic member 291 on the right side pulls the second coil portion 220, The tilting of the movable member 220 can be prevented.

Fig. 4 is a perspective view (a) and a sectional view (b) showing the configuration not shown in Fig. 3 in the embodiment of Fig. As shown, the second coil part 220 may include a column 220a, an upper plate 220b, and a lower plate (not shown). The columnar portion 220a may have a cylindrical shape, and the upper plate 220b and the lower plate may be in the form of a disk. Here, on the upper surface of the upper plate 220b, the receiving portion may be formed as a circular depression, and a disk-shaped rotary portion 225 may be disposed in the circular receiving portion. The diameter of the rotation part 225 may be smaller than the diameter of the circular receiving part and a bearing member 226 contacting both the rotation part 225 and the receiving part may be disposed in the space between the rotation part 225 and the receiving part . The bearing member 226 is not limited as long as it can smoothly support the relative rotation between the rotation part 225 and the upper plate 220b of the second coil part 220 such as a roller bearing and a ball bearing. Both ends of the elastic members 290 and 291 may be connected to the cover 250 and the rotation unit 225, respectively.

As described above, the second coil part 220 does not rotate when the hull 1 rotates, but the cover 250 can rotate together with the hull 1 because it is connected to the hull 1 side. Therefore, one end of the elastic members 290 and 291 connected to the cover 250 can rotate together with the hull 1. One end of the elastic body 290 or 291 rotates together with the hull 1 and the other end of the elastic body 290 or 291 rotates along with the rotation of the hull 1 if the rotation part 225 and the bearing member 226 are not included, The elastic members 290 and 291 may be twisted or broken. However, in this embodiment, the other end of the elastic members 290 and 291 can be connected to the rotation part 225, and the bearing member 226 is interposed between the rotation part 225 and the upper plate 220b, The rotation part 225 can also rotate together. Therefore, the possibility of twisting or breakage of the elastic members 290 and 291 can be eliminated.

Figs. 5 and 6 are views schematically showing a modification to the embodiment of Fig. 3. Fig. 5, the pair of elastic members 290 and 291 can be connected to the central pillar portion of the second coil portion 220, and the other end can be connected to the side of the hull 1. Therefore, when the second coil part 220 tends to be inclined counterclockwise, the upper elastic body 290 can provide compression restoring force to the second coil part 220, and the lower elastic body 291 2 coil part 220 to provide tensile restoring force.

When the second coil part 220 is not inclined but moves to the left side (actually, when the ship instantaneously moves toward the second coil part 220), the second coil part 220 is moved to the right Can be provided.

On the other hand, in the modified example, a configuration for preventing the elastic members 290 and 291 from being twisted or broken can be employed. To illustrate this, FIG. 6 is presented.

Fig. 6 is a perspective view (a) and a sectional view (b) showing a configuration not shown in Fig. 5 in the modification of Fig. As shown in the drawing, the receiving portion may be formed in the side surface of the columnar portion 220a of the second coil portion 220 along the circumferential direction of the columnar portion 220a, and the rotation portions 227 and 228 . The rotation parts 227 and 228 may be provided in a pair vertically spaced like the elastic members 290 and 291 and may have a ring shape to be accommodated in the receiving part of the column part 220a. The height of the rotation portions 227 and 228 may be smaller than the height of the accommodation portion and the bearing member 229 may be disposed between the rotation portions 227 and 228 and the accommodation portion. The present invention is not limited to this but the bearing member 229 may be provided on the side surfaces of the rotation portions 227 and 228 and the side surfaces of the second nose 228. [ Or may be provided between the pillars 220a of the part 220. [ Both ends of the above-described elastic members 290 and 291 can be connected to the hull 1 side and the rotation portions 227 and 228, respectively.

One end of the elastic bodies 290 and 291 connected to the hull 1 can rotate together with the hull 1 when the hull 1 rotates and the rotary part 227 connected to the other ends of the elastic bodies 290 and 291 And 228 are also rotatable together with the hull 1, the possibility of twisting or breaking of the elastic members 290 and 291 can be eliminated.

7 is a view schematically showing a non-contact type power swivel 300 according to another embodiment of the present invention. As shown, the position adjusting device according to the present embodiment may include an elastic pad 390. The elastic pad 390 is interposed between the first coil part 310 and the second coil part 320 so that both ends of the elastic pad 390 contact the first coil part 310 and the second coil part 320, Can support. The tilting of the second coil part 320 and the horizontal eccentric movement of the second coil part 320 can be prevented.

8 is a schematic view of a non-contact type power swivel 400 according to another embodiment of the present invention. In this embodiment, the pressure acting between the first coil part 410 and the second coil part 420 is sensed, and it is possible to grasp in which direction the second coil part 420 is inclined depending on whether the pressure increases or decreases , It is possible to prevent the inclination of the second coil part 420 by taking appropriate measures according to the grasped result.

Referring to FIG. 8, the position adjusting device according to the present embodiment may include a pair of contact members 490 and 491. The contact members 490 and 491 may be provided in the form of a pad and may be formed of a material capable of accommodating the fluid therein as described later and expandable or contractible according to the pressure of the fluid.

The pair of contact members 490 and 491 may be arranged to contact both the first coil part 410 and the second coil part 420.

The pair of contact members 490 and 491 may be spaced upward and downward with respect to each other, and thus may be disposed on the same vertical plane with respect to each other. Accordingly, the first coil part 410 and the second coil part 420 can be connected to each other at two locations in the vertical direction.

On the other hand, a pair of pressure sensing bodies s may be disposed at positions adjacent to the pair of contact members 490 and 491, respectively. The pressure sensing body s is a known pressure sensor for sensing a change in pressure acting on the contact members 490 and 491 and may be provided on the outer surface of the contact members 490 and 491, Or may be embedded within the contact members 490 and 491. [

Further, a pair of fluid control units 492 and 493 may be provided and connected to the pair of contact members 490 and 491, respectively. The fluid control units 492 and 493 can supply a predetermined fluid to the contact members 490 and 491 and conversely can suck and discharge the fluid contained in the contact members 490 and 491. [ To this end, the fluid control units 492 and 493 may include devices such as pumps, piping, and the like.

In the case where the second coil portion 420 tends to be tilted in the counterclockwise direction, for example, the pressure acting on the contact member 490 disposed on the upper side will increase, and the pressure acting on the contact member 491 disposed on the lower side The pressure will decrease. The pair of pressure sensing bodies s sensing the increase or decrease in the pressure acting on the contact members 490 and 491 can sense this phenomenon and determine whether the second coil part 420 is tilted or not, The load direction can be grasped.

The fluid control unit 492 connected to the upper contact member 490 can supply a predetermined fluid to the contact member 490. When the second coil part 420 is tilted in the counterclockwise direction, . The fluid control unit 493 connected to the lower contact member 491 can suck the fluid contained in the contact member 491 and discharge it to the outside of the contact member 491. Thus, the tilting of the second coil part 420 can be prevented.

At this time, the contact members 490 and 491 may be elastic materials capable of shrinking and expanding. In such a case, the fluid control units 492 and 493 may be configured to inflate the contact members 490 and 491 by injecting a predetermined fluid into the contact members 490 and 491, The contact members 490 and 491 can be contracted.

When the second coil part 220 tends to be tilted counterclockwise as in the above example, the upper contact member 490 is inflated by the fluid control unit 492 to expand more than the initial state The second coil part 420 can be pushed. The fluid contained in the lower contact member 491 is sucked (exhausted) by the fluid control unit 493 so that the contact member 491 can contract more than the initial state and the second coil part 420 The contact member 491 can be connected to each other, and the contact member 491 can pull the second coil part 420.

On the other hand, when the second coil part 420 tries to move to the left, fluid is supplied to the pair of contact members 490 and 491 connected to the pair of fluid control units 492 and 493, 2 coil part 420 can be pushed to the right side, and the distance between the first coil part 410 and the second coil part 420 can be maintained.

According to embodiments of the present invention that can be implemented by various configurations as described above, the power feeding efficiency can be maintained at a high level by keeping the separation distance between the first coil part and the second coil part within a predetermined range.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. It will be understood that various changes, modifications, or substitutions may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1000: Power supply unit 2000: Turret load
100: non-contact type power swivel 110: first coil part
120: second coil part 130: first case
140: second case 135, 145: through-hole
150: cover 170: bearing part

Claims (8)

A first coil part connected to a floating structure and rotatable together with the floating structure, and receiving a current from a power supply part disposed in the floating structure;
A first coil part connected to a turret relatively rotating with the floating structure and being spaced apart from the first coil part by a predetermined distance and having a current induced by a magnetic field formed in the first coil part, 2 coil part; And
And a position adjusting device for adjusting a position of at least one of the first coil part and the second coil part to maintain a distance between the first coil part and the second coil part within a predetermined range,
The position adjusting device comprises:
A rotating part provided on the second coil part and relatively rotating with the second coil part; And
And an elastic body having one end and the other end connected to the rotating part and the floating structure, respectively, and returning the second coil part to a predetermined position when the second coil part moves,
Wherein when the floating structure rotates, the rotating portion rotates together with the floating structure to maintain the power feeding efficiency. The method according to claim 1,
Wherein the position adjusting device is capable of maintaining the power feeding efficiency operated by the inclination of the second coil portion. The method according to claim 1,
Wherein the position adjusting device is capable of maintaining the power feeding efficiency when the second coil part is moved in the first coil part direction. delete The method according to claim 1,
Wherein the elastic members are provided in at least one pair and each of the two elastic members included in the pair of elastic members are symmetrically arranged with respect to a center of the second coil portion, Wherein the elastic body provides compressive restoring force to the second coil portion and the other elastic body is capable of maintaining the power feeding efficiency to provide tensile restoring force to the second coil portion. A first coil part connected to a floating structure and rotatable together with the floating structure, and receiving a current from a power supply part disposed in the floating structure;
A first coil part connected to a turret relatively rotating with the floating structure and being spaced apart from the first coil part by a predetermined distance and having a current induced by a magnetic field formed in the first coil part, 2 coil part; And
And a position adjusting device for adjusting a position of at least one of the first coil part and the second coil part to maintain a distance between the first coil part and the second coil part within a predetermined range,
Wherein the position adjusting device includes an elastic pad interposed between the first coil part and the second coil part and in contact with both the first coil part and the second coil part, wherein the power feeding efficiency can be maintained. A first coil part connected to a floating structure and rotatable together with the floating structure, and receiving a current from a power supply part disposed in the floating structure;
A first coil part connected to a turret relatively rotating with the floating structure and being spaced apart from the first coil part by a predetermined distance and having a current induced by a magnetic field formed in the first coil part, 2 coil part; And
And a position adjusting device for adjusting a position of at least one of the first coil part and the second coil part to maintain a distance between the first coil part and the second coil part within a predetermined range,
The position adjusting device includes:
A pressure sensing body interposed between the first coil part and the second coil part to sense a change in pressure between the first coil part and the second coil part;
A contact member interposed between the first coil portion and the second coil portion and contacting both the first coil portion and the second coil portion, the contact member being capable of receiving a fluid therein; And
Wherein when a change in pressure between the first coil section and the second coil section is sensed by the pressure sensing element, a fluid for supplying fluid to the contact element or discharging fluid contained in the contact element from the contact element A non-contact power swivel including a control unit capable of maintaining power supply efficiency. 8. The method of claim 7,
Wherein the contact member includes a first contact member disposed on an upper portion of a space between the first coil portion and the second coil portion and a second contact member disposed on a lower portion of the space between the first coil portion and the second coil portion, Member,
Wherein the pressure sensing body includes a first pressure sensing body for sensing a change in pressure acting on the first contact member and a second pressure sensing body for sensing a change in pressure acting on the second contact member,
Wherein the fluid control unit includes a first fluid control unit connected to the first contact member and a second fluid control unit connected to the second contact member,
The first fluid control unit supplies the fluid to the first contact member when the pressure acting on the first contact member and the pressure acting on the second contact member respectively increase and decrease as the second coil part tilts And the second fluid control unit is capable of maintaining the power feeding efficiency for discharging the fluid accommodated in the second contact member.

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