KR20140137483A - Canister-type thruster - Google Patents

Canister-type thruster Download PDF

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Publication number
KR20140137483A
KR20140137483A KR1020130057632A KR20130057632A KR20140137483A KR 20140137483 A KR20140137483 A KR 20140137483A KR 1020130057632 A KR1020130057632 A KR 1020130057632A KR 20130057632 A KR20130057632 A KR 20130057632A KR 20140137483 A KR20140137483 A KR 20140137483A
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KR
South Korea
Prior art keywords
canister
rack gear
trunk
lifting
guide
Prior art date
Application number
KR1020130057632A
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Korean (ko)
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KR101540303B1 (en
Inventor
김지남
금창환
박석귀
최권호
오환엽
Original Assignee
삼성중공업 주식회사
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Priority to KR1020130057632A priority Critical patent/KR101540303B1/en
Publication of KR20140137483A publication Critical patent/KR20140137483A/en
Application granted granted Critical
Publication of KR101540303B1 publication Critical patent/KR101540303B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
    • B63H25/42—Steering or dynamic anchoring by propulsive elements; Steering or dynamic anchoring by propellers used therefor only; Steering or dynamic anchoring by rudders carrying propellers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63H5/125—Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction, e.g. podded azimuthing thrusters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H19/00—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion
    • F16H19/02—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion
    • F16H19/04—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion comprising a rack
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63H5/125—Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction, e.g. podded azimuthing thrusters
    • B63H2005/1254—Podded azimuthing thrusters, i.e. podded thruster units arranged inboard for rotation about vertical axis
    • B63H2005/1256—Podded azimuthing thrusters, i.e. podded thruster units arranged inboard for rotation about vertical axis with mechanical power transmission to propellers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
    • B63H25/42—Steering or dynamic anchoring by propulsive elements; Steering or dynamic anchoring by propellers used therefor only; Steering or dynamic anchoring by rudders carrying propellers
    • B63H2025/425—Propulsive elements, other than jets, substantially used for steering or dynamic anchoring only, with means for retracting, or otherwise moving to a rest position outside the water flow around the hull

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transmission Devices (AREA)

Abstract

A canister-type thruster is disclosed. The canister-type thruster according to an embodiment of the present invention comprises: a canister lifting within a trunk of a hull or a floating structure; a lifting device having a rack gear which is installed in the canister in the lifting direction in order to lift the canister and a pinion gear which is installed in the trunk and engaged with the rack gear; a guide device which is mounted on the trunk to guide the elevation of the lifting device and having a flank guide unit connected with the rack gear; and a spacer corresponding to the flank guide unit and protruded in the canister rather than the rack gear.

Description

CANISTER-TYPE THRUSTER {CANISTER-TYPE THRUSTER}

The present invention relates to a canister type thruster for preventing rack gear damage of a lift device.

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 the conventional thruster is installed in the lower part of the hull (underwater), there is a problem that it is difficult to repair or replace 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.

In addition, there is always a risk of damaging the rack gear of the lifting device that allows the canister to be lifted and lowered in the trunk extending from the deck to the bottom of the hull. For example, rack gears are susceptible to damage of the tooth surface due to the rolling motion of the hull due to hull anchoring or by algae, wind, crazing, etc., leading to failures of lifting parts due to uneven mismatch of rack gears and pinion gears .

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

An embodiment of the present invention is intended to provide a canister type thruster for preventing rack gear damage of a lift device.

The embodiments of the present invention are intended to provide a canister-type thruster capable of easily raising and lowering the canister while being easily manufactured and installed.

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 device having a rack gear installed on the canister to extend and retract in the ascending and descending direction for lifting and lowering the canister, and a pinion gear provided in the trunk and engaged with the rack gear; A guide device provided in the trunk for guiding the lifting and lowering of the canister and having a tooth surface guide portion in contact with the rack gear; And a spacer provided on the canister so as to protrude from the rack gear in correspondence with the tooth surface guide portion.

The rack gear may include a neck portion with the canister, and the spacer may be provided on the neck portion.

The spacers may be spaced apart at predetermined intervals along the length of the rack gear.

Wherein the rack gear is provided on both sides of the rack gear in such a manner that the pinion gear and the teeth engaging with the pinion are symmetrical to each other, the tooth surface guide portion is fixed to the inner surface of the trunk, And the rack gear and the tooth surface guide portion may be provided so as to be opposed to the outer wall of the canister in a pair of port-starboard direction.

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 device having a rack gear installed on the canister in an ascending / descending direction for lifting and lowering the canister, and a pinion gear mounted on the trunk and engaging with the rack gear; And a guiding device provided on the trunk for guiding the lifting and lowering of the canister and having a tooth guiding part in contact with the rack gear, wherein the elevating device and the guiding device are paired to form a canister- A thruster may be provided.

The canister type thruster according to the embodiment of the present invention can effectively prevent the tooth damage of the rack gear that can occur in the rolling motion of the hull by providing the spacer between the guide device for guiding the rack gear up and down and the rack gear of the lift device have.

The canister type thruster according to the embodiment of the present invention can easily install the guide device and the landing gear on the same line and can simplify the configuration of the guide device, .

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.
6 is a side view showing the configuration of a guide device, a spacer and a restraining device of a canister type thruster according to an embodiment of the present invention.
7 is a perspective view of a lower guide unit of a canister type thruster according to an embodiment of the present invention.
8 is a front view of the lower guide unit of the canister type thruster according to the embodiment of the present invention.
9 is a cross-sectional view showing a rack gear of a canister type thruster according to an embodiment of the present invention and a spacer mounted thereon.

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 a guide device 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 provided in the vertical support portion 133. The vertical support portion 133 includes a vertical support portion 133 rotatably supported by 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 rotate 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 guide device for guiding the lifting and lowering of the canister 110 is provided on the inner surface of the trunk 2 on the upper side of the elevation drive portion 143 to support the rack gear 141 A lower guide unit 160 for guiding the raising and lowering of the rack gear 141 by supporting the rack gear 2 on the inner surface of the trunk 2 under the lifting drive unit 143, Unit 170, as shown in FIG.

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, so that the rack gear 141 is slidably supported Thereby guiding smooth up and down of the canister 110. Herein, only the upper guide unit 160 and the lower guide unit 170 are shown as an example, but the guide apparatus is provided in the same shape as the upper or lower guide units 160 and 170 so as to be additionally installed on the elevation trajectory of the rack gear 141 As shown in Fig. These guiding devices may be provided on both sides of the trunk 2 where the lifting device 140 is located.

2, 7 and 8, the lower guiding unit 170 includes a support bracket 171 fixed to the inner surface of the trunk 2 and a guide bracket 171 provided symmetrically on both sides of the support bracket 171, Two tooth guide portions 172 that are in contact with the teeth 141b on both sides of the rack gear 141 and a side surface (flat surface on which no teeth are formed) of the rack gear 141 to guide the rack gear 141 up and down And side guide portions 173 provided on the support bracket 171 between the guide portions 172. [ The lower guiding unit 170 can support the rack gear 141 without shaking by keeping the two tooth guiding portions 172 and the side guiding portions 173 around the rack gear 141 in the form of a D shape.

The support bracket 171 constituting the skeleton of the guide portion 172 and the side guide portion 173 can be manufactured by welding a plurality of metal plates by welding and the support bracket 171 is welded And can be fixed to the inner surface of the trunk.

The guide portion 172 and the side guide portion 173 are respectively provided with sliding pads 172a and 173a which come in contact with the rack gear 141 and guide the lifting and lowering. Each of the sliding pads 172a and 173a may be detachably coupled to the inner surface of the tooth guide 172 and the side guide 173 so that the sliding pads 172a and 173a can be replaced when worn or damaged. The clearance between the sliding pads 172a and 173a and the rack gear 141 is adjusted between the tooth surface guide portion 172 and the sliding pad 172a and between the side guide portion 173 and the sliding pad 173a. One or more thickness regulating plates 172b, 173b may be interposed.

The tooth surface guide portion 172 and the side guide portion 173 are provided with entrance guide portions 172c and 173c which maintain the inclination with respect to the raising and lowering direction of the rack gear 141 so that the rack gear 141 can smoothly enter the inside thereof, And inclined guide surfaces 172d and 173d may be formed at the upper and lower ends of the sliding pads 172a and 173a to maintain the inclination with respect to the vertical direction of the rack gear 141. [

The sliding pads 172a and 173a may be formed of a non-metallic material having a weaker rigidity than the rack gear 141 so as to guide smooth sliding movement while protecting the teeth 141b 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.

The upper guide unit 160 may also be provided in substantially the same form as the lower guide unit 170. However, considering that the rack gear 141 is disengaged from the upper guide unit 160 or the lower guide unit 170 when the canister 110 is lowered or raised, The directions of the entrance guiding portions 172c and 162c for guiding the entrance of the entrance guide can be reversed. 3, the upper guide unit 160 may have an entry guide portion 162c disposed at a lower portion thereof and the lower guide unit 170 may have an entry guide portion 172c disposed at an upper portion thereof.

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 arranged on the same line as the rack gear 141 to guide the rack gear 141, the guide device 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 guiding device and the landing gear are provided separately like a normal canister type thruster, precise engagement of the rack gear and the pinion gear of the lifting gear should be taken into consideration while maintaining accurate coupling of the guide device 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.

Meanwhile, as described above, the rack gear 141 of the canister 110 installed in the trunk 2 extending from the deck to the bottom of the hull has a risk of damage due to the external environment. For example, the rack gear 141 is liable to be damaged by the rolling motion of the hull when the hull is anchored or by algae, wind, crazing, or the like.

The present embodiment includes a spacer 180 protruding from the teeth 141b of the rack gear 141 in the canister 110 in correspondence with the tooth surface guide portion 172a of the guide device to prevent tooth damage of the rack gear . The spacer 180 is installed in the rack gear 141 as shown in Figs. 2, 6, and 9.

9 and 10, the canister 110 is provided with a neck portion 141c on the back surface of the body portion 141a of the rack gear 141 in order to install the rack gear 141 therein. The neck portion 141c is formed to be narrower than the body portion 141a of the rack gear 141 so that the rack gear 141 and the pinion gear 142 can be easily engaged with each other. The spacer 180 can be easily installed in the space formed in the spacer 180. Since the side surface (front surface of the body portion) of the rack gear 141 is in contact with the sliding pad 173a of the guide device, the installation of the spacer is unnecessary.

The spacers 180 may be formed of a metal material or a hard synthetic resin material, and may be spaced apart at predetermined intervals along the longitudinal direction of the rack gear to reduce manufacturing costs.

On the other hand, as shown in Fig. 6, the spacers 180 are installed in the guiding apparatus and the elevating apparatus of the present invention, which are installed in pairs facing each other in the port-starboard direction with respect to the bow of the hull, . The reason why the guide device and the landing gear are installed in the port-starboard direction is that the rolling motion of the hull is large in the lateral movement, so that the teeth 141c of the rack gear 141 are not positioned in this direction, It is because. The tooth damage caused by the longitudinal movement can be prevented by using the spacer 180. Although not shown, if the guide device and the landing gear are installed in the fore-aft direction, the effect of preventing the tooth damage caused by the spacer 180 is further increased.

2: trunk, 110: canister,
130: propelling head, 131: propeller,
140: lifting device, 141: rack gear,
150: restricting device, 160: upper guide unit,
170: Lower guide unit, 180: Spacer.

Claims (5)

A canister which ascends and descends in a trunk of a ship or a floating structure;
A lifting device having a rack gear installed on the canister in an ascending / descending direction for lifting and lowering the canister, and a pinion gear mounted on the trunk and engaging with the rack gear;
A guiding device provided on the trunk for guiding the lifting and lowering of the canister and having a tooth surface guide portion in contact with the rack gear; And
And a spacer provided on the canister to protrude from the rack gear in correspondence with the tooth surface guide portion. The method according to claim 1,
Wherein the rack gear includes a neck portion with the canister,
Wherein said spacer is provided in a neck portion. 3. The method of claim 2,
Wherein the spacers are spaced apart at predetermined intervals along the length of the rack gear. 4. The method according to any one of claims 1 to 3,
Wherein the rack gear is provided on both sides in the width direction so that the pinion gear and the teeth to be engaged with each other are symmetrical,
Wherein the tooth surface guide portion includes a support bracket fixed to the inner surface of the trunk and a guide bracket provided symmetrically on both sides of the support bracket so as to guide the rack gears,
Wherein the rack gear and the tooth guide are paired and are provided opposite the outer wall of the canister in a port-starboard direction. A canister which ascends and descends in a trunk of a ship or a floating structure;
A lifting device having a rack gear installed on the canister in an ascending / descending direction for lifting and lowering the canister, and a pinion gear mounted on the trunk and engaging with the rack gear; And
And a guiding device provided on the trunk for guiding the lifting and lowering of the canister and having a tooth guiding portion in contact with the rack gear,
Wherein the elevating device and the guiding device are provided in pairs so as to face each other in a port-starboard direction.
KR1020130057632A 2013-05-22 2013-05-22 Canister-type thruster KR101540303B1 (en)

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KR101540303B1 KR101540303B1 (en) 2015-07-31

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Publication number Priority date Publication date Assignee Title
US7641526B1 (en) * 2008-09-09 2010-01-05 Thrustmaster of Texas, Inc. Vessel and underwater mountable azimuthing thruster
KR20100074397A (en) * 2008-12-24 2010-07-02 현대중공업 주식회사 Drillship thruster guiding system
KR20110139545A (en) * 2010-06-23 2011-12-29 현대중공업 주식회사 Canister of drillship having rack gear and sliding rail structure
KR20130020169A (en) * 2011-08-19 2013-02-27 현대중공업 주식회사 Canister for drill ship

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