KR101505799B1

KR101505799B1 - Canister-type thruster

Info

Publication number: KR101505799B1
Application number: KR1020130049452A
Authority: KR
Inventors: 최권호; 김지남; 박석귀; 금창환
Original assignee: 삼성중공업 주식회사
Priority date: 2013-05-02
Filing date: 2013-05-02
Publication date: 2015-03-26
Also published as: KR20140131414A

Abstract

A canister thruster is disclosed. A canister type thruster according to an embodiment of the present invention includes a canister that ascends and descends in a trunk of a ship or a floating structure; A lifting and lowering device including a rack gear installed on the outer surface of the canister in a lengthwise direction of the canister and a lifting and driving unit provided on the trunk and equipped with a rack gear and a pinion gear engaged with the rack gear and a driving source for driving the rack gear; And a guide unit provided on the inner surface of the trunk to guide the lifting and lowering of the rack gear, and a guide gear rotating and engaging with the teeth of the rack gear.

Description

CANISTER-TYPE THRUSTER {CANISTER-TYPE THRUSTER}

The present invention relates to a canister type thruster which is easy to manufacture and install and which can smoothly raise and lower the canister.

Special vessels, such as drillships, must be able to berth in the working area of the sea, so a Dynamic Positioning System is needed to maintain its position even under the influence of algae, wind and digging. Therefore, these ships have a thruster that can control the position of the ship by generating propulsion force while changing direction in the water.

However, since a normal thruster is installed in the lower part of the hull (under water), it is difficult to repair or replace it if a failure occurs. In the event of a breakdown at sea, it may be necessary to move the hull to the land where the dock is located for repair. A canister type thruster is proposed to solve these operational difficulties and to be able to perform repair or replacement work on the thruster in the maritime work area.

Korean Published Patent Application No. 10-2011-0139545 (published on December 29, 2011) and Published Patent Application No. 10-2010-0074397 (published on May 07, 2010) each show an example of a canister type thruster . The canister type thruster includes a canister installed to raise and lower in a trunk extending from a deck to a bottom of the hull, a propulsion head installed at a lower portion of the canister and capable of switching the direction of 360 degrees, driving devices for operating the propulsion head in the canister An elevating device for elevating and lowering the canister, and a guide device for guiding the elevation of the canister.

The lift device for lifting and lowering the canister may be configured to include a rack gear provided on a side surface of the canister, and a lifting and lowering drive portion having a pinion gear engaged with the rack gear and a motor for driving the rack gear.

Such a thruster can change the position of the propelling head through lifting and lowering of the canister. It is possible to switch to an operation mode in which the propulsion head is positioned below the hull bottom, a movement mode in which the propulsion head is pulled up into the trunk when the hull is operated, and a maintenance mode in which the propulsion head is pulled up to the maintenance area inside the hull . It is also possible to use a crane or the like to raise the canister and the propelling head together and separate them from the hull.

On the other hand, the canister is difficult to handle because it is a huge structure having a width of about 5 to 6 m in cross section and a height of about 10 m. The weight of the canister and the device mounted thereon is also very large. Therefore, it is very difficult to install the canister into the trunk of the hull or detach it from the hull for repairs.

Korean Patent Publication No. 10-2011-0139545 (disclosed on Dec. 29, 2011) Korean Patent Publication No. 10-2010-0074397 (published on Jul. 02, 2010)

The embodiments of the present invention are intended to provide a canister-type thruster that is easy to manufacture and install, and can easily lift and lower the canister.

According to an aspect of the present invention, there is provided a canister, comprising: a canister that ascends and descends in a trunk of a hull or a floating structure; A lifting and lowering device including a rack gear installed on an outer surface of the canister in a lengthwise direction of the canister, a lift driving part provided on the trunk and including a pinion gear engaged with the rack gear and a driving source for driving the rack gear; And a guide unit provided on the inner surface of the trunk for guiding the raising and lowering of the rack gear and having a guide gear rotated by engaging with the teeth of the rack gear included in the raising and lowering apparatus have.

The guide unit includes an upper guide unit installed on an inner surface of the trunk of the upper part of the lifting and lowering drive unit to guide the lifting and lowering of the rack gear, a lower guide unit installed on the inner surface of the trunk of the lower part of the lifting and lowering unit, .

Wherein the upper guide unit and the lower guide unit are provided on both sides in the width direction of the rack gear so as to be symmetrical with the pinion gear of the elevation drive unit, Respectively, and the guide gears on both sides may be arranged so as to be symmetrical to each other.

Wherein the upper guide unit and the lower guide unit are fixed to the inner surface of the trunk and have gear holders for supporting the guide gears on both sides thereof; And a sliding guide portion provided in the gear housing.

The sliding guide may include a sliding pad, which is in contact with a side surface of the rack gear and detachably mountable.

According to another aspect of the present invention, there is provided a canister for a ship, comprising: a canister which ascends and descends in a trunk of a hull or a floating structure; A lifting and lowering device including a rack gear which is installed on the inner surface of the trunk in a direction of lifting and lowering the canister, a lifting and lowering driving unit provided on the canister and including a pinion gear engaged with the rack gear and a driving source for driving the rack gear. And a guide unit provided on the canister and guiding the raising and lowering of the rack gear and having a guide gear that rotates and engages with the teeth of the rack gear included in the raising and lowering apparatus .

The canister type thruster according to the embodiment of the present invention can be easily installed because the guiding unit and the landing gear are disposed on the same line and the guiding unit guides the lifting and lowering of the rack gear. It is not necessary to separately install a rail for guiding the canister, so that the manufacturing cost can be reduced and the productivity can be increased.

The canister-type thruster according to the embodiment of the present invention is provided with guide gears that rotate with the rack gear engaged with the guide unit, so that it is possible to guide smooth raising and lowering of the canister while using a rack gear having irregular guide surfaces as guiding means As well as the teeth on both sides of the rack gear can be stably protected.

1 is a cross-sectional view illustrating an inner structure of a canister type thruster according to an embodiment of the present invention and a hull mounted state thereof.
2 is a perspective view of a canister type thruster according to an embodiment of the present invention.
Figs. 3 to 5 are cross-sectional views taken along line AA of Fig. 1, showing the canister moved to the operating mode, the moving mode, and the maintenance mode, respectively.
FIG. 6 is a cross-sectional view showing a cross-sectional structure of a canister and a trunk of a canister type thruster according to an embodiment of the present invention and a configuration of a restraining device for restricting the canister.
7 is a perspective view of an upper guide unit of a canister type thruster according to an embodiment of the present invention.
8 is a front view of the upper guide unit of the canister type thruster according to the embodiment of the present invention.
9 is a cross-sectional view illustrating a canister type thruster 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. The following embodiments are provided to fully convey the spirit of the present invention to a person having ordinary skill in the art to which the present invention belongs. The present invention is not limited to the embodiments shown herein but may be embodied in other forms. For the sake of clarity, the drawings are not drawn to scale, and the size of the elements may be slightly exaggerated to facilitate understanding.

1 shows an internal configuration of a canister type thruster and a hull attachment state according to the present embodiment.

The canister type thruster 100 according to the embodiment of the present invention can be applied to a ship or a floating structure that needs to maintain an anchoring state in a working area in the sea. For example, it can be applied to drillships drilling for oil and gas resources, floating production storage offloading (FPSO), and so on. The canister type thruster 100 can be applied to special ships such as a tugboat, icebreaker, and the like as well as ordinary transportation vessels in addition to the case where position control is required in an anchored state.

Referring to FIGS. 1 and 2, a ship 1 (or a floating structure) of a ship to which a canister type thruster 100 is applied has a trunk 2 penetrating in the vertical direction. The thruster 100 includes a canister 110 installed in the trunk 2 so as to be able to move up and down, a propulsion head 130 installed at a lower portion of the canister 110, a lifting device 140 moving the canister 110 up and down, And an upper guide unit 160 and a lower guide unit 170 for guiding the lifting and lowering of the canister 110.

1, 2, and 6, the canister 110 may be provided in the form of a rectangular box whose bottom and side surfaces are watertight. The trunk 2 of the hull 1 may be in the form of a rectangular barrel slightly larger than the canister. As an example, the canister 110 and the trunk 2 may have a rectangular cross-sectional shape, but the cross-sectional shape of the canister 110 and the trunk 2 may be variously changed, such as hexagon, octagon, .

As shown in FIG. 1, the canister 110 can be divided into a plurality of spaces by a plurality of decks 112, 113, and 114 spaced apart from each other in the vertical direction. The lower compartment 116 between the bottom plate 111 and the first deck 112 from the lower side of the canister 110, the drive device room 117 between the first deck 112 and the second deck 113, An auxiliary equipment room 118 between the second deck 113 and the third deck 114 and an upper compartment 119 between the third deck 114 and the top plate 115. In addition, a ladder 120 may be installed vertically in the canister 110 so as to move to each space.

A drive motor 121 for driving a propulsion head 130 to be described later is installed in the drive device room 117 and various control equipment and power supply equipment for controlling the operation of the thruster 100 are installed in the auxiliary equipment room 118 Can be installed. Here, as an example, the configuration of the inside of the canister 110 is presented only, and the internal configuration of the canister 110 is not limited to this form. The inside of the canister 110 can be variously changed according to the design.

1 to 3, the propulsion head 130 includes a propeller 131, a streamlined propeller support 132 for supporting the propeller 131, and a propeller support 132 extending upwardly from the propeller support 132, And a cylindrical shroud 135 provided around the propeller 131 for guiding the propulsion water is included in the vertical support portion 133. The vertical support portion 133 includes a vertical support portion 133 rotatably mounted on the bottom plate 111 of the canister 110, can do.

The lower compartment 116 of the canister 110 is provided with a drive shaft 136 for transmitting the rotation of the drive motor 121 to the propeller 131 and a vertical support portion 133 and a propeller support portion 132 , Rotation shafts and gears for connecting the drive shaft 136 and the propeller 131 for power transmission are installed. Steering motors 137 may be installed in the lower compartment 116 to rotate the rotation link 134 to rotate the propulsion head 130 360 degrees.

The propelling head 130 can generate propelling water by rotating the propeller 131 by the operation of the driving motor 121 in a state where the propelling head 130 is positioned below the bottom surface of the hull 1 as shown in FIGS. In addition, the propulsion head 130 can be rotated by the operation of the steering motors 137 to control the direction of the propulsion water. The propulsion water can move the hull 1 to a desired position so that the hull 1 can maintain its position in the sea despite the influence of algae or waves. The propeller in which the propelling head 130 rotates at the bottom of the hull 1 is also referred to as an azimuth thruster.

The lifting device 140 for moving the canister 110 up and down can be installed between the outer surface of the canister 110 and the inner surface of the trunk 2, as shown in FIGS. Also, elevating devices 140 of the same type may be provided on both sides of the canister 110 so that both sides of the canister 110 can be raised and lowered on the same condition.

Each lifting and lowering device 140 includes a rack gear 141 fixed to the side surface of the canister 110 and extended in the lifting direction and two pinion gears 141 and 142 fixed to the inner surface of the trunk 2, (142), and an elevation driving unit (143) having a driving source for driving these pinion gears (142).

The rack gear 141 is elongated from the upper side to the lower side of the canister 110 as shown in FIGS. 2 and 3, has two pinion gears 142 on both sides in the width direction thereof, and teeth 141b, Are symmetrical. The present embodiment shows a configuration in which two pinion gears 142 engage with both side teeth 141b of the rack gear 141 in order to realize stable lifting and lowering, but the teeth 141b of the rack gear 141, And one pinion gear 142 may be engaged with the pinion gear. The present embodiment shows a state in which the body portion 141a of the rack gear 141 and the teeth 141b on both sides thereof are integrated with each other. However, the rack gear 141 has the body portion 141a and the teeth portion 141b They may be separately manufactured and then combined with each other. Further, since the rack gear 141 is a long and large component for realizing lifting and lowering of the canister 110, which is a huge structure, it may be divided into a plurality of elements,

As shown in Fig. 1, the lifting drive portion 143 can be installed at a position higher than the upper and lower middle portions of the trunk 2, and on both sides of the inner surface of the trunk 2 where the lifting drive portion 143 is located, And an installation space 3 for installation and maintenance of the air conditioner 143 may be provided. The drive source of the lifting drive portion 143 may include a reduction gear device capable of realizing a decelerated rotation of the two pinion gears 142 and a motor for driving the reduction gear device, As shown in FIG.

The raising and lowering device 140 can move up and down the canister 110 by raising and lowering the rack gear 141 by the operation of the raising and lowering driving part 143, The position can be changed. That is, as shown in FIG. 3, an operation mode in which the propulsion head 130 is positioned below the bottom of the hull 1 to perform position control of the hull 1, A driving mode in which the head 130 is pulled up into the trunk 2, a maintenance mode in which the propulsion head 130 is pulled up to the maintenance position on the upper part of the trunk 2 for maintenance of the propulsion head 130, Mode.

5, a maintenance space 6 for maintenance of the propulsion head 130 may be provided on the side of the trunk 2 at a height where the propulsion head 130 is located in the maintenance mode . The maintenance space 6 may be of sufficient size to separate the components of the propulsion head 130 and store them therein or to allow the operator to access the propulsion head 130 to perform maintenance, It may be located above the surface of the water.

As shown in FIGS. 3 and 6, the canister type thruster 100 includes a plurality of restraint devices 150 that can restrain the canister 110 without shaking in a state of being switched to an operation mode, a moving mode, Respectively.

The restraint apparatus 150 includes a driving unit 151 installed in the canister 110 and driven by a driving unit 151 and a driving unit 151 including a motor or a hydraulic cylinder and a latching rod 152 for projecting outside the canister 110, And a plurality of engaging members 153 which are fixed to the inner surface of the trunk 2 at a position corresponding to the restraining device 150 and have grooves which are engaged with the engaging rod 152. The plurality of latching members 153 may be provided at positions corresponding to the engagement of the latching rod 152 in a state where the canister 110 moves to the operation mode, the movement mode, and the maintenance mode.

1 and 2, the upper guide unit 160 and the lower guide unit 170, which guide the lifting and lowering of the canister 110, are fixed to the inner surface of the trunk 2, ).

The upper guide unit 160 guides the rack gear 141 to move up and down by supporting the rack gear 141 in a state where the upper guide unit 160 is installed on the inner surface of the trunk 2 on the upper part of the elevation driving unit 143, And also guides the lifting and lowering of the rack gear 141 by supporting the rack gear 2 in a state where it is installed on the inner surface of the trunk 2 under the idler 143. [

That is, in this embodiment, the upper guide unit 160 and the lower guide unit 170 are mounted on the inner surface of the trunk 2 coinciding with the ascending / descending trajectory of the rack gear 141 to support the rack gear 141, ) Of the vehicle. Here, only the upper guide unit 160 and the lower guide unit 170 are shown as an example, but the arrangement of the guide units is not limited thereto. A separate guide unit may be provided in the form of upper or lower guide units 160 and 170 on the locus of the rack gear 141 moving up and down. The guide units may be provided on both sides of the trunk 2 where the lifting device 140 is located for stable lifting and lowering of the canister 110.

The upper guide unit 160 includes a gear housing 161 fixed to the inner surface of the trunk 2 and teeth 141b on both sides of the rack gear 141 as shown in Figs. 2, 7, A plurality of guide gears 162 provided on both sides of the gear housing 161 so as to be engaged with the rack gear 141 and a side face And a sliding guide portion 163 provided at a substantially middle portion of the sliding guide portion 161.

The gear housing 161 can be manufactured by welding a plurality of metal plates and the back side of the gear housing 161 can be fixed to the inner surface of the trunk 2 by welding. A gear support portion 165 having a C-shaped cross-sectional structure is provided on both sides of the gear housing 161 so as to support a shaft 162a of the guide gear 162 while partially accommodating a plurality of guide gears 162 therein .

The plurality of guide gears 162 can be freely rotatably supported by the shaft 162a in the gear support portions 165 on both sides of the gear housing 161 and can be arranged to be symmetrical on both sides of the gear housing 161 . And a part thereof may be exposed for engagement with the teeth 141b of the rack gear 141 and the remaining portion may be received in the gear support portion 165 and protected.

The present embodiment shows a case where three guide gears 162 are provided on both sides of the gear housing 161 to stably support both sides of the rack gear 141 to be lifted and lowered. But is not limited thereto. One or more guide gears 162 may be installed on both sides of the gear housing 161. The number of the guide gears 162 on both sides of the gear housing 161 may be different from each other. In this case, the installation height of the two side guide gears 162 may be different. That is, the arrangement of the two side guide gears 162 may not be symmetrical.

The sliding guide portion 163 includes a sliding pad 163a that contacts the side surface of the rack gear 141 and guides the lifting and lowering. The sliding pad 163a may be detachably coupled to the sliding pad 163a by a bolt fastening method so that the sliding pad 163a can be replaced when it is worn or damaged. One or more thickness adjusting plates 163b may be provided on the back surface of the sliding pad 163a to adjust the gap between the sliding pad 163a and the side surface of the rack gear 141 during installation.

An inclined guide surface 163c that maintains the inclination with respect to the lifting direction of the rack gear 141 is provided at the upper and lower portions of the sliding pad 163a so that the rack gear 141 can smoothly enter the upper guide unit 160 Respectively.

The sliding pad 163a may be formed of a non-metallic material having a lower rigidity than the rack gear 141 so as to guide smooth sliding movement while protecting the side surface of the rack gear 141. [ It may preferably be a synthetic resin material having a small friction resistance and excellent abrasion resistance and impact resistance.

8, the upper guide unit 160 can guide the raising and lowering of the rack gear 141 smoothly by supporting the side teeth 141b and the side surfaces of the rack gear 141 entering the inside thereof . At this time, the guide gears 162 on both sides restrict the wobbling of the rack gear 141 in a state where the guide gears 162 are engaged with the teeth 141b of the ascending and descending rack gear 141, And guides the lifting and lowering of the both side teeth 141b while rotating. The sliding guide portion 163 guides the side surface of the rack gear 141 by slidingly supporting the side surface of the rack gear 141 by the sliding pad 163a.

Since the upper guide unit 160 guides the lifting and lowering in such a manner that the plurality of guide gears 162 are rotated by engaging with the teeth 141b of the rack gear 141, It is possible to realize stable support while guiding the canister 110 to move up and down smoothly, even though the rack gear 141 forming the canister 110 is used as the guiding means of the canister 110. [ Since the plurality of guide gears 162 guide the lifting and lowering in such a manner that the guide gears 162 are engaged with the teeth 141b on both sides of the rack gear 141 and thereby the wear of the teeth 141b on both sides of the rack gear 141 can be reduced It is possible to stably protect the teeth 141b on both sides of the rack gear 141 while using the rack gear 141 as a guiding means.

The lower guiding unit 170 may be provided in substantially the same form as the upper guiding unit 160. The distance between the upper guide unit 160 and the lower guide unit 170 may be shorter than the entire length of the rack gear 141. [ 5, the raising and lowering rack gear 141 is supported by the upper guide unit 160 and the pinion gear 142 of the elevation drive unit 143, or as shown in Fig. 3, The rack gear 141 is supported by the pinion gear 142 of the lifting and driving unit 143 and at least two points of the rack gear 141 are supported.

When the canister type thruster 100 is installed in the hull 1 for the first time or is separated from the hull 1 for repairs, the canister 110 having the propulsion head 130 mounted thereon is lifted by a crane or the like The canister 110 is lowered so that the canister 110 enters the opening in the upper portion of the trunk 2. [

At this time, the rack gears 141 on both sides of the canister 110 are guided by the upper guide unit 160 and then engaged with the pinion gear 142 of the elevation driving unit 143 located below the rack guide 141, Lt; / RTI > Thereafter, the canister 110 can be introduced by the operation of the lifting drive unit 143, and the descending rack gear 141 can naturally enter the lower guide unit 170 and be stably supported.

Particularly, in this embodiment, since the upper guide unit 160 and the lower guide unit 170 are disposed on the same line as the rack gear 141 to guide the rack gear 141, the guide unit and the lift device are disposed at different positions It is possible to implement an easy installation as compared with a normal canister type thruster.

If the guidance unit and the landing gear are separately provided like a normal canister type thruster, precise engagement of the rack gear and the pinion gear of the lifting gear is also considered while maintaining the accurate coupling of the guide unit during the installation process. And it is very difficult to implement accurate installation. Large structures such as canisters are not easy to handle due to their size and weight.

However, in the canister type thruster of this embodiment, the upper guide unit 160 and the lower guide unit 170 are disposed on the same line as the rack gear 141 of the elevating device 140 to guide the raising and lowering of the rack gear 141 It is possible to realize easier installation. In addition, since it is not necessary to separately install a rail for guiding the canister 110, it is possible to simplify the construction, thereby reducing manufacturing cost and increasing productivity. Since the upper guide unit 160 and the lower guide unit 170 are provided with the guide gear 162 that rotates and rotates with the rack gear 141, the rack gear 141 having irregular guide surfaces is used as a guiding means, It is possible not only to guide the lifting and lowering of the rack 110 smoothly but also to stably protect the teeth 141b on both sides of the rack gear 141. [

Fig. 9 shows another embodiment of the canister-type thruster. 9, the lifting and lowering device 240 for lifting and lifting the canister 110 includes a rack gear 241 which is installed on the inner surface of the trunk 2 in a lengthwise direction of the canister 110 and includes a rack gear 241, An elevation driving unit 243 having a pinion gear 242 and a drive source for driving the pinion gear 242 is mounted on the canister 110. [ That is, the mounting position of the rack gear 241 and the lifting and lowering driving unit 243 is changed, unlike the above-described example. The upper guide unit 260 and the lower guide unit 270 are installed on the side of the canister 110 so as to move along the rack gear 241.

This canister type thruster can realize the lifting and lowering of the canister 110 by the operation of the lifting drive portion 243 and the upper guide unit 260 and the lower guide unit 270 provided on the canister 110 can be moved by the rack gear 241 So that the lift of the canister 110 can be guided. Since the upper guide unit 260 and the lower guide unit 270 are provided with the plurality of guide gears that rotate in the engaged state with the rack gear 241 as in the above-described example, the guide surface moves along the irregular rack gear 241 The canister 110 can be smoothly lifted and lowered.

In the example of FIG. 9, the remaining configurations may be substantially the same as those of the above-mentioned embodiment, so that the description will be omitted in order to avoid redundancy.

2: trunk, 110: canister,
130: propelling head, 131: propeller,
140: lifting device, 141: rack gear,
142: pinion gear, 150: restricting device,
160: upper guide unit, 162: guide gear,
170: Lower guide unit.

Claims

A canister which ascends and descends in a trunk of a ship or a floating structure;
A lifting and lowering device including a rack gear installed on an outer surface of the canister in a lengthwise direction of the canister, a lift driving part provided on the trunk and including a pinion gear engaged with the rack gear and a driving source for driving the rack gear; And
And a guiding unit provided on the inner surface of the trunk to guide the lifting and lowering of the rack gear and having a guide gear that rotates and engages with the teeth of the rack gear included in the lifting device.

The method according to claim 1,
The guide unit includes an upper guide unit installed on an inner surface of the trunk of the upper part of the lifting and lowering drive unit to guide the lifting and lowering of the rack gear, a lower guide unit installed on the inner surface of the trunk of the lower part of the lifting and lowering unit, Including a canister thruster.

3. The method of claim 2,
Wherein the rack gear is provided on both sides in the width direction so as to be symmetrical with a pinion gear of the lifting and lowering driving portion,
Wherein the upper guide unit and the lower guide unit are respectively disposed on both sides of the guide gear so as to engage with the teeth on both sides of the rack gear and the guide gears on both sides are arranged symmetrically with each other.

The method of claim 3,
Wherein the upper guide unit and the lower guide unit are fixed to the inner surface of the trunk and have gear holders for supporting the guide gears on both sides thereof; And a sliding guide portion provided in the gear housing.

5. The method of claim 4,
And the sliding guide portion includes a sliding pad which is detachably fitted to the side surface of the rack gear and is detachably mountable.

A canister which ascends and descends in a trunk of a ship or a floating structure;
A lifting and lowering device including a rack gear which is installed on the inner surface of the trunk in a direction of lifting and lowering the canister, a lifting and lowering driving unit provided on the canister and including a pinion gear engaged with the rack gear and a driving source for driving the rack gear. And
And a guide unit installed on the canister and guiding the raising and lowering of the rack gear, the guide unit having a guide gear that rotates and engages with the teeth of the rack gear included in the raising and lowering apparatus.