WO2015167263A1 - 프로펠러 캐비테이션 유기 기진력 저감형 선박 - Google Patents

프로펠러 캐비테이션 유기 기진력 저감형 선박 Download PDF

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Publication number
WO2015167263A1
WO2015167263A1 PCT/KR2015/004354 KR2015004354W WO2015167263A1 WO 2015167263 A1 WO2015167263 A1 WO 2015167263A1 KR 2015004354 W KR2015004354 W KR 2015004354W WO 2015167263 A1 WO2015167263 A1 WO 2015167263A1
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WO
WIPO (PCT)
Prior art keywords
propeller
work gas
gas
work
working gas
Prior art date
Application number
PCT/KR2015/004354
Other languages
English (en)
French (fr)
Korean (ko)
Inventor
이정훈
김진학
박형길
이경준
김윤식
박지환
전명호
한재문
허갑
김부기
Original Assignee
삼성중공업 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020140053289A external-priority patent/KR20150126452A/ko
Priority claimed from KR1020140055216A external-priority patent/KR101607873B1/ko
Priority claimed from KR1020140077115A external-priority patent/KR101607876B1/ko
Application filed by 삼성중공업 주식회사 filed Critical 삼성중공업 주식회사
Priority to JP2016564165A priority Critical patent/JP6275872B2/ja
Priority to CN201580024060.XA priority patent/CN106458307B/zh
Publication of WO2015167263A1 publication Critical patent/WO2015167263A1/ko

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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/02—Propulsive elements directly acting on water of rotary type
    • B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
    • B63H1/14—Propellers
    • B63H1/15—Propellers having vibration damping means
    • 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
    • B63H5/16—Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in recesses; with stationary water-guiding elements; Means to prevent fouling of the propeller, e.g. guards, cages or screens

Definitions

  • the present invention relates to a propeller cavitation organic vibration reduction type ship, and more particularly, to a propeller cavitation organic vibration reduction type ship with improved structure for vibration reduction.
  • the propeller wing itself is designed differently in shape or size, the shape of the ship's rear end is improved, or a separate reinforcement is added to block the noise and vibration,
  • We have tried to apply or apply various methods such as attaching a guide device to guide the flow of water from the water, reducing the size of the propeller, etc., but it is effective to reduce the vibration force. It is difficult.
  • vibration problems including noise transmitted to the hull due to increased propulsion force during operation of the propeller, must be solved urgently in the case of ships intended for excursions such as cruise ships or ships that require quiet operation such as warships. It is.
  • the present applicant has applied for a number of techniques to the Korean Patent Office to reduce the vibration force by forming an air layer in the form of a certain amount of air bubbles on the surface of the hull adjacent to the propeller.
  • the technical problem to be achieved by the present invention is to prevent the vibration generated in the hull by increasing the vibration force during the operation of the propeller, in particular, the installation and operation of the associated parts, including the compressor, and energy consumption It is to provide a propeller cavitation organic vibration reduction type vessel that can fundamentally prevent the burden.
  • the propeller is provided with a hull; And a work gas accommodating membrane pad coupled to the hull adjacent to the propeller, wherein a work gas generating a reflected wave for generating an incident wave and a destructive interference phenomenon generated during rotation of the propeller is accommodated on one side.
  • Ships may be provided.
  • the working gas receiving membrane pad may be made of a material whose acoustic impedance is similar to that of water.
  • the material of the working gas receiving membrane pad may be rubber, and the working gas may be air.
  • the working gas receiving membrane pad may be coupled to the hull wall on the upper side of the propeller.
  • the working gas receiving membrane pad may be coupled to a plurality of wall surfaces of the hull adjacent to the propeller.
  • Working gas sizes of the working gas receiving membrane pads coupled to a plurality of wall surfaces of the hull may be provided differently.
  • the N working gas receiving membrane pads may be attached to a wall of the hull adjacent to the propeller.
  • the work gas volume control unit a work gas receiver (receiver) in which the work gas is stored; A working gas main line connecting the working gas receiver and the working gas receiving membrane pad; And a first valve provided on the work gas main line to selectively interrupt the flow of the work gas on the work gas main line.
  • the work gas volume adjusting unit may include a regulator provided on the work gas main line to maintain a constant pressure with respect to the work gas supplied through the work gas receiver; A check valve provided on the work gas mainline between the constant pressure and the first valve to prevent backflow of the work gas; A second valve provided at a work gas branch line branched from the main body of the work gas, the second valve selectively interrupting the flow of the work gas on the work gas branch line; And a pressure gauge provided on the work gas mainline between the first valve and the work gas accommodating membrane pad to measure the pressure of the work gas supplied to the work gas accommodating membrane pad.
  • the work gas volume control unit a propeller rotation speed sensor for detecting the rotation speed of the propeller; And a controller configured to control operations of the work gas receiver, the first valve, and the second valve based on the information from the propeller rotation speed detector.
  • a bottom plug module including a bottom socket coupled to the hull and a bottom plug detachably coupled to the bottom socket may further include a bottom plug module.
  • the membrane pad may be detachably coupled to the bottom plug module.
  • the bottom plug may include: a plug head coupled to a socket through portion of the bottom socket; And a threaded plug shaft connected to the plug head and exposed to the outer wall of the hull through the bottom socket, wherein the working gas receiving membrane pad is inserted into the threaded plug shaft of the bottom plug.
  • the pad body hole may be provided.
  • a fixing nut fastened to the threaded plug shaft at an outer side of the hull to fix the work gas accommodating membrane pad;
  • a sealing gasket having a gasket hole inserted into the screw plug shaft, the sealing gasket being in close contact with the screw plug shaft to seal the pad body hole;
  • a plate hole inserted into the threaded plug shaft, the reinforcing plate disposed between the sealing gasket and the fixing nut to reinforce the work gas accommodating membrane pad.
  • the present invention it is possible to prevent vibration from occurring in the hull due to increased vibration force during the operation of the propeller, and in particular, the burden of energy consumption due to the installation and operation of the compressor and its related components, and the like. You can prevent it.
  • FIG. 1 is a structural diagram of a propeller region of a propeller cavitation organic vibration reducing vessel according to a first embodiment of the present invention.
  • FIG. 2 is an enlarged view of region A of FIG. 1.
  • 3 is a layout view between the propeller and the working gas receiving membrane pad.
  • FIG. 4 is a schematic rear view of the region A of FIG. 1 and not shown with a propeller.
  • 5 is a diagram measuring the impedance of water, rubber and air.
  • FIG. 6 is a view for explaining the principle of the incident wave and the reflected wave.
  • FIG. 8 is a diagram showing a state where the working gas accommodating membrane pads are installed in the starboard region directly above the propeller, showing a plurality of fluctuation pressure measuring points.
  • FIG. 9 is a graph showing the efficiency of the working gas receiving membrane pad based on the frequency of the propeller.
  • FIG. 10 is a graph summarizing the results of the 150 Hz band for the working gas accommodating membrane pad corresponding to FIG. 8.
  • 11 is a graph showing the relationship between the optimum equivalent air volume according to the reduction target frequency.
  • FIG. 12 is a rear structural diagram of a vibration reduction type ship according to a second embodiment of the present invention, in which working gas receiving membrane pads are installed at various positions.
  • FIG. 13 is a schematic configuration diagram of a work gas volume control unit in a propeller cavitation organic vibration reducing vessel according to a third embodiment of the present invention.
  • FIG. 14 is a control block diagram of the working gas volume adjusting unit of FIG. 13.
  • FIG. 15 is an enlarged view illustrating main parts of a propeller cavitation organic vibration reduction type vessel according to a fourth embodiment of the present invention.
  • FIG. 16 is an enlarged structural diagram of region B of FIG. 15.
  • FIG. 17 is an exploded view of FIG. 16.
  • FIG. 1 is a structural diagram of a propeller region of a propeller cavitation organic vibration reducing vessel according to a first embodiment of the present invention
  • FIG. 2 is an enlarged view of region A of FIG. 1
  • FIG. Arrangement and FIG. 4 is a schematic rear view of the region A of FIG. 1, with the propeller not shown.
  • the propeller cavitation organic vibration reduction type ship can increase the vibration force during operation of the propeller 120 to prevent the vibration generated in the hull, in particular, including the compressor It is to be able to fundamentally prevent the burden of energy consumption, such as the installation and operation of the relevant parts, and includes a hull 110, and the working gas receiving membrane pad 130 coupled to the hull (110).
  • the rear of the hull 110 is provided with a propeller 120 for the propulsion of the hull 110.
  • a rudder 125 may be provided around the propeller 120 to adjust a traveling direction of the ship.
  • the rudder 125 may be a general rudder or a bulb rudder.
  • the ship applied in the present embodiment may include all of the floating marine structures, including merchant ships, warships, fishing vessels, carriers, drillships, cruise ships and special working ships. Therefore, the scope of the present embodiment can not be limited to a specific vessel.
  • the propeller 120 when the propeller 120 is operated, that is, when the propeller 120 is rotated in the water, the fluctuation pressure is generated in the water due to the propeller 120 as a rotating body, the generated fluctuation pressure is the hull 110 By increasing the vibration force of the furnace, it acts as a factor in generating vibration (including noise) in the hull.
  • the vibration transmitted to the hull 110 should be prevented because it can be a big problem in the case of a ship that is intended to cruise or a quiet ship such as a warship, for example, a cruise ship.
  • the vibration force is to be prevented from occurring due to the increase in vibration force in the ship body 110.
  • the working gas receiving membrane pad 130 Is applied.
  • the working gas accommodating membrane pad 130 applied to the ship of the present embodiment has a completely different form from the structures that form an air layer, which is a conventional air bubble form.
  • the working gas receiving membrane pad 130 applied in the present embodiment is only a tube-type structure in which air is trapped, and thus related components including a compressor, which had to be used when applying an air layer, were used. There is no need to install or operate.
  • the working gas receiving membrane pad 130 that plays this role is coupled to the hull 110 adjacent to the propeller 120, as shown in FIG. 1, and is generated when the propeller 120 rotates to face the hull 110.
  • the reflection wave is generated to cancel the incident wave, but the work gas is accommodated on one side.
  • the working gas receiving membrane pad 130 may be coupled to the wall of the hull 110 on the upper side of the propeller 120.
  • the drawing shows that the working gas receiving membrane pad 130 is attached directly above the propeller 120.
  • the work gas accommodating membrane pad 130 is positioned within 0.5 R of the STBD area center standard of the propeller 120. Can be deployed.
  • R means the radius from the center line (CL) of the propeller 120 to the end of the propeller (120).
  • the work gas accommodating membrane pad 130 may be disposed within 0.5 R of the center of the PORT area directly above the propeller 120. Placement of the receiving membrane pad 130 may result in optimal efficiency.
  • the working gas receiving membrane pad 130 is a pad body 131 detachably coupled to the hull 110, the work gas pocket 132 is formed on one side of the pad body 131 is sealed to accommodate the working gas 132 ).
  • the material of the working gas receiving membrane pad 130 may be rubber, and the working gas may be air.
  • the scope of the present embodiment is not limited thereto. That is, if the material of the working gas accommodating membrane pad 130 is a material similar to rubber, it is sufficient, and the working gas may be changed to various gases as long as it is not liquid.
  • the pad body 131 forming the working gas receiving membrane pad 130 is a flat structure made of a rubber material, it is utilized as a portion detachably coupled to the hull 110.
  • the pad body 131 may be coupled to the hull 110 through various structures and methods.
  • the pad body 131 may be attached to the hull 110 in various ways, such as a bolt and nut coupling method, a fitting coupling method, a welding coupling method for internally welding an insert metal plate, and a coupling method using a bottom plug. Can be combined.
  • the coupling method using the bottom plug is described below in the following embodiments.
  • the pad body 131 has a square shape, but the shape of the pad body 131 may be various, including a square shape, a circular shape, and a triangular shape. Therefore, the right scope of the present embodiment is not limited to the shape of the pad body 131.
  • the work gas pocket 132 is formed inside the pad body 131 and has a shape inflated toward one side of the pad body 131.
  • the working gas bag 132 has a circular shape, but the shape of the working gas bag 132 may also be various polygonal shapes such as a triangular shape and a square shape, so the scope of the present invention is limited to the shape of the drawings. Can't be.
  • the working gas bag 132 may be filled with air as the working gas.
  • the work gas filled in the work gas bag 132 is formed to be integrally contained in the manufacture of the work gas accommodating membrane pad 130, and leaks in the work gas bag 132 unless the work gas bag 132 is incised. It doesn't work.
  • FIG. 5 is a diagram measuring the impedance of water, rubber and air
  • Figure 6 is a view for explaining the principle of the incident wave and reflected wave
  • Figure 7 is a view of the working gas receiving membrane pad for explaining [Equation 1]
  • Figure 8 is a diagram showing a working gas accommodating membrane pad in a starboard region directly above the propeller, showing a plurality of pressure measuring points
  • FIG. 9 is a graph showing the efficiency of the working gas accommodating membrane pad based on the propeller frequency.
  • FIG. 10 is a graph summarizing the results of the 150 Hz band for the work gas accommodating membrane pad corresponding to FIG. 8, and
  • FIG. 11 is a graph showing the relationship between the optimum equivalent air volume according to the reduction target frequency.
  • the acoustic impedance (rubber) of rubber which is a material of the working gas accommodating membrane pad 130 of the present embodiment, is different from that of water. While roughly similar, it can be seen that it is infinitely larger than air.
  • the incident wave generated during operation of the propeller 120 passes through the rubber layer, which is a wall surface of the work gas bag 132, and then is filled in the work gas, ie, air, filled in the work gas bag 132.
  • the light is reflected in a phase opposite to the incident wave, that is, it is formed as a reflected wave.
  • This reflected wave causes a destructive interference phenomenon with the incident wave, thereby canceling the incident wave generated during operation of the propeller 120. Due to this phenomenon, the vibration force can be reduced to reduce the occurrence of vibration of the hull 110.
  • spherical pressure waves generated by cavitation that is, incident waves, may propagate omnidirectionally.
  • the incident wave When the incident wave is formed as a reflected wave that is reflected in the opposite phase by hitting the air, the reflected wave meets the incident wave incident toward the working gas accommodating membrane pad 130 to cause an incident wave and a destructive interference phenomenon.
  • f is the propeller's reduced frequency band
  • c a 340 m / s
  • c w 1500 m / s
  • ⁇ a 1.02 kg / m 3
  • ⁇ w 1024 kg / m 3
  • a and b denote inner diameter and outer diameter when the working gas receiving membrane pads 130a to 130c are equivalent spheres as shown in FIG. 10.
  • the horizontal axis (x-axis) represents frequency
  • the vertical axis (y-axis) represents the amount of increase and decrease after the attachment before the work gas accommodating membrane pad 130 is attached. It can be seen that the fluctuation pressure and vibration increase after the installation compared to the installation of the working gas accommodating membrane pad 130, but a significant reduction effect occurs in the vicinity of the design frequency 150 Hz band.
  • FIG. 10 summarizes the results of the 150 Hz band.
  • the fluctuation pressures at positions P2, P3, and P4 located outside the work gas accommodating membrane pad 130 are reduced by about 70% on average.
  • the vibration level is also significantly reduced by more than 70%.
  • FIG. 11 is a graph showing the relationship between the optimum equivalent air volume according to the reduction target frequency.
  • the target frequency is 6 Hz
  • the optimum work bag pocket 132 of the receiving membrane pad 130 is optimal.
  • the volume may be about 1500L (Liter), and as long as it satisfies such a volume condition, the shape of the working gas bag 132 may be circular or rectangular.
  • the vibration force may be prevented from occurring when the propeller 120 is operated to prevent the vibration from occurring in the hull 110, in particular, the compressor and its related parts. It is possible to fundamentally prevent obstacles such as the installation of parts and the burden of energy consumption due to operation.
  • vibration can be effectively prevented from occurring in the hull 110 as described above, therefore, in the case of a ship intended for excursion, such as a cruise ship, or a ship to which a quiet operation such as a warship is to be assumed, it causes the vessel. It is possible to appropriately solve the vibration problem including noise.
  • the propeller 120 the shape or size of the wing itself differently as in the prior art, to improve the shape of the ship's tail, or to add a separate reinforcement for blocking noise and vibration, or bow
  • the noise and vibration problems by reducing various losses such as attaching a guide device to guide the flow of water from the water or reducing the size of the propeller 120, etc.
  • the present technology provides a margin for eliminating vibration constraints in the propeller design by shielding the vibration force, it may be helpful to improve the propulsion efficiency, such as to greatly increase the size of the propeller 120. It is expected.
  • FIG. 12 is a rear structural diagram of a vibration reduction type ship according to a second embodiment of the present invention, in which working gas receiving membrane pads are installed at various positions.
  • the reduced frequency band f is inversely proportional to the air volume (radius, a), and also the working gas accommodating membrane pads 130a to 130c. It can be seen that it is applicable to only one frequency band per one.
  • the vibration component (or excitation component) is transmitted to the hull 110 during the rotation of the propeller 120 to vibrate the hull 110, the size of the vibration component may vary for each frequency.
  • the work gas accommodating membrane pads 130a to 130c are applied by the number N of frequency bands applied thereto. Must be used.
  • N working gas receiving membrane pads may be attached to the wall of the hull 110 adjacent to the propeller 120.
  • FIG. 12 illustrates that three working gas receiving membrane pads 130a to 130c are coupled to a plurality of wall surfaces of the hull 110 adjacent to the propeller 120 to control three frequency bands such as 130 Hz, 140 Hz, and 150 Hz. Indicates a situation.
  • the size of the work gas of the work gas receiving membrane pads 130a to 130c coupled to a plurality of wall surfaces of the hull 110 that is, the sizes of the work gas pockets 132a to 132c may be provided differently.
  • the work gas receiving membrane pads 130a to 130c can significantly reduce the vibration force of the hull 110 by the offset interference principle, whether one or a plurality is installed.
  • the vibration force may be prevented from occurring when the propeller 120 operates to prevent vibration from occurring in the ship body 110. It can fundamentally prevent obstacles such as the installation of compressors and related parts, and the burden of energy consumption due to operation.
  • FIG. 13 is a schematic block diagram of a work gas volume adjusting unit in a propeller cavitation organic vibration reducing vessel according to a third embodiment of the present invention
  • FIG. 14 is a control block diagram of the work gas volume adjusting unit of FIG. 13.
  • the propeller cavitation organic vibration reduction type vessel is connected to the work gas accommodating membrane pad 330, and adjusts the volume of the work gas accommodated in the work gas accommodating membrane pad 330
  • the working gas volume adjusting unit 350 may be further provided.
  • the volume of the working gas on the working gas receiving membrane pad 330 can be adjusted using the working gas volume adjusting unit 350, one working gas containing membrane is attached to the hull 110 (see FIG. 1). Even if the pad 330 is applied, it is possible to variably control the change in the excitation frequency band according to the change in the rotation speed of the propeller 120 (see FIG. That is, even if the rotational speed of the propeller 120 changes during the operation of the ship, it is possible to provide an effect of reducing vibration for all the frequency bands corresponding to the rotational speed of the changed propeller 120. easily represented, even if the rotational speed of the propeller 120 is changed, the vibration of the hull 110 can be reduced.
  • the rear end of the hull 110 is provided with a propeller 120 for the propulsion of the hull 110, in this embodiment the propeller rotation speed sensor 370 is connected to the propeller 120 is the number of revolutions of the propeller 120 ( RPM).
  • the reduced frequency band f of the propeller 120 may be in inverse proportion to the air volume (radius, a). 330) It can be seen that only applicable to one frequency band per one.
  • N is a natural number
  • only one specific frequency band can be controlled through only one working gas receiving membrane pad 330.
  • the work gas accommodating membrane pad 330 may be attached by using the number N of the frequency bands applied as shown in FIG. 12, or the work gas volume adjusting part 350 may be used as in this embodiment.
  • the volume of the working gas on the working gas receiving membrane pad 330 may be adjusted.
  • the working gas volume adjusting unit 350 When the working gas volume adjusting unit 350 is applied as in the present embodiment, even if one working gas accommodating membrane pad 330 is applied, it is possible to variably control the variation of the excitation frequency band according to the rotational speed of the propeller 120. have. Therefore, even if the propeller 120 is rotated at any rotational speed it can reduce the vibration formed in the hull 110.
  • the working gas volume adjusting unit 350 applied to the ship of the present embodiment is connected to the working gas receiving membrane pad 330 and works to variably control the excitation frequency band according to the rotational speed of the propeller 120. It serves to adjust the volume of the working gas accommodated in the working gas bag 332 of the gas receiving membrane pad 330.
  • the work gas volume control unit 350 is a work gas receiver 351, a receiver, a regulator (352), a check valve (353), the first and second valves (354, 355, valve), a pressure gauge (358), And a propeller rotation speed detector 370 and a controller 360.
  • the work gas receiver 351 (receiver) stores the work gas and serves to supply the stored work gas by the control of the controller 360.
  • the work gas receiver 351 may be connected to a compressor (not shown).
  • the work gas receiver 351 and the work gas pocket 332 of the work gas accommodating membrane pad 330 are connected to the work gas main line 356.
  • One side of the work gas main line 356 is connected to the work gas branch line 357 intersecting with the work gas main line 356.
  • the regulator 352 is provided on the work gas main line 356 and serves to maintain a constant pressure with respect to the work gas supplied through the work gas receiver 351.
  • the check valve 353 is provided on the work gas main line 356 between the pressure regulator 352 and the first valve 354 to prevent backflow of the work gas.
  • the first valve 354 is provided on the work gas main line 356 and serves to selectively interrupt the flow of the work gas on the work gas main line 356.
  • the second valve 355 is provided in the work gas branch line 357 branched with respect to the work gas main line 356 and serves to selectively interrupt the flow of the work gas on the work gas branch line 357. .
  • the pressure gauge 358 is provided on the work gas main line 356 between the first valve 354 and the work gas pocket 332 of the work gas accommodating membrane pad 330 to work on the work gas accommodating membrane pad 330. It serves to measure the pressure of the working gas supplied to the gas bag (332).
  • the propeller rotation speed sensor 370 detects the rotation speed (RPM) of the propeller 120.
  • the propeller rotation speed sensor 370 may be wireless or wired.
  • the controller 360 controls the operation of the work gas receiver 351, the first valve 354, and the second valve 355 based on the information of the propeller rotation speed sensor 370.
  • the frequency in which the vibration reduction effect is exhibited is in the range of 160 Hz, 155 Hz, and 145 Hz as the volume of the working gas accommodated in the working gas bag 332 of the working gas accommodating membrane pad 330 is increased. You can see that it is moving. In other words, as the size of the work gas bag 332 of the work gas accommodating membrane pad 330 increases, the frequency at which the reduction performance is exhibited moves to a low frequency band (or a corresponding number of revolutions of the propeller 120). You can see that.
  • the controller 360 is to increase or decrease the volume of the work gas bag 332 of the work gas accommodating membrane pad 330 according to the rotational speed of the propeller 120 (work gas receiver ( 351, the operations of the first valve 354 and the second valve 355 are controlled.
  • the controller 360 performing this role may include a central processing unit 361 (CPU), a memory 362 (MEMORY), and a support circuit 363 (SUPPORT CIRCUIT).
  • CPU central processing unit
  • MEMORY memory
  • SUPPORT CIRCUIT SUPPORT CIRCUIT
  • the central processing unit 361 is industrially used to control the operation of the work gas receiver 351, the first valve 354 and the second valve 355 based on the information of the propeller rotation speed sensor 370 in this embodiment. It may be one of various computer processors that can be applied to.
  • the memory 362 is connected to the central processing unit 361.
  • the memory 362 may be installed locally or remotely as a computer readable recording medium, and may be readily available, such as, for example, random access memory (RAM), ROM, floppy disk, hard disk, or any digital storage form. At least one or more memories.
  • the support circuit 363 (SUPPORT CIRCUIT) is combined with the central processing unit 361 to support typical operation of the processor.
  • Such support circuits 363 may include caches, power supplies, clock circuits, input / output circuits, subsystems, and the like.
  • the controller 360 controls the operation of the work gas receiver 351, the first valve 354, and the second valve 355 based on the information of the propeller rotation speed sensor 370.
  • a series of processes in which the controller 360 controls the operation of the work gas receiver 351, the first valve 354, and the second valve 355 based on the information of the propeller rotation speed sensor 370 is a memory.
  • 362 may be stored.
  • software routines may be stored in memory 362.
  • Software routines may also be stored or executed by other central processing units (not shown).
  • FIG. 15 is an enlarged view illustrating main parts of a propeller cavitation organic vibration reduction type vessel according to a fourth embodiment of the present invention
  • FIG. 16 is an enlarged structural diagram of region B of FIG. 15, and
  • FIG. 17 is an exploded view of FIG. 16.
  • the working gas receiving membrane pad 430 may be coupled to the bottom plug module 450 of the hull 410.
  • the bottom plug module 450 is a structure installed in the hull 410. When the bottom plug module 450 is coupled to the work gas accommodating membrane pad 430, the coupling of the work gas accommodating membrane pad 430 is performed.
  • the advantage is that no separate structure or component is required.
  • the bottom plug module 450 is a component mounted on the wall surface of the hull 410, and serves as a stopper for draining the water introduced into the hull 410.
  • the bottom plug module 450 is not a component to be removed.
  • the bottom plug module 450 includes a bottom socket 460 coupled to the hull 410, and a bottom plug 470 detachably coupled to the bottom socket 460.
  • the hull 410 is provided with a socket coupling part 411 for coupling the bottom socket 460.
  • the first inclined surface 412 and the first horizontal surface 413 are formed on the outer wall of the socket coupling part 411, and the second inclined surface 461 and the second horizontal surface 462 are also formed in the bottom socket 460. do.
  • the bottom socket 460 may be coupled to the socket coupling part 411.
  • the bottom socket 460 may be advantageous in that it is not assembled or screwed into the socket coupling portion 411 is not easily separated.
  • the bottom plug 470 is a structure detachably coupled to the bottom socket 460.
  • the bottom plug 470 is connected to the plug head 471 and the plug head 471 coupled to the socket through part 463 of the bottom socket 460, and the bottom of the hull 410 through the bottom socket 460.
  • a threaded plug shaft 472 is exposed to the outer wall.
  • the plug head 471 and the bottom socket 460 are provided with a plurality of first and second through holes 471a and 160a which communicate with each other so that the bolt is fastened.
  • the working gas receiving membrane pad 430 may be detachably coupled to the threaded plug shaft 472 of the bottom plug 470.
  • the fixing nut 481, the sealing gasket 482, and the reinforcing plate 483 may be used. A structure is required.
  • the fixing nut 481 fixes the pad body 431, the sealing gasket 482, and the reinforcing plate 483 of the work gas accommodating membrane pad 430 to the threaded plug shaft 472. Do it.
  • the fixing nut 481 is fastened to the threaded plug shaft 472 on the outside of the hull 410 so that the pad body 431, the sealing gasket 482, and the reinforcing plate 483 of the membrane pad 430 for the work gas are accommodated. ) Is fixed.
  • Fixing nut 481 is preferably applied to a nut having a loosening prevention function that is not released.
  • the sealing gasket 482 has a gasket hole 451a inserted into the threaded plug shaft 472 and is in close contact with the threaded plug shaft 472 to seal the pad body hole 431a.
  • the sealing gasket 482 may be made of a rubber material that is slightly elastic.
  • the reinforcement plate 483 has a plate hole 483a inserted into the threaded plug shaft 472 and is disposed between the sealing gasket 482 and the fixing nut 481 to reinforce the pad body 431. do.
  • the threaded plug shaft 472 of the bottom plug 470 is previously exposed to the outer wall of the hull 410 in the structure of the bottom plug 470, Even if the bottom is submerged in water, it is difficult to insert the pad body 431, the sealing gasket 482, and the reinforcing plate 483 into the threaded plug shaft 472 and finish with the fixing nut 481. not.
  • the work gas accommodating membrane pad may be removed in the reverse order as described above, and the new work gas accommodating membrane pad may be put back into place. It is not difficult to work.
  • the working gas receiving membrane pad 430 when the working gas receiving membrane pad 430 is installed on the hull 410 by utilizing the bottom plug module 450 already applied to the hull 410 as in this embodiment, the working gas receiving membrane pad ( Installation or maintenance work of the 420 can be easily and conveniently performed.
  • the present invention is applied to ships including all floating marine structures, including merchant ships, warships, fishing vessels, carriers, drillships, cruise ships and special working ships to be used to prevent the occurrence of vibration in the hull Can be.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Vibration Prevention Devices (AREA)
PCT/KR2015/004354 2014-05-02 2015-04-29 프로펠러 캐비테이션 유기 기진력 저감형 선박 WO2015167263A1 (ko)

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JP2016564165A JP6275872B2 (ja) 2014-05-02 2015-04-29 プロペラキャビテーション誘起起振力低減型船舶
CN201580024060.XA CN106458307B (zh) 2014-05-02 2015-04-29 用于减小螺旋桨气穴引起的激振力的船

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KR10-2014-0053289 2014-05-02
KR10-2014-0055216 2014-05-09
KR1020140055216A KR101607873B1 (ko) 2014-05-09 2014-05-09 프로펠러 캐비테이션 유기 기진력 저감형 선박
KR1020140077115A KR101607876B1 (ko) 2014-06-24 2014-06-24 프로펠러 캐비테이션 유기 기진력 저감형 선박
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WO2017108838A1 (en) * 2015-12-22 2017-06-29 Rolls-Royce Marine As Hull having a compliant surface
WO2018156165A1 (en) * 2017-02-27 2018-08-30 General Electric Company Downstream surface features to attenuate propeller wake acoustic interactions
US10829206B2 (en) 2016-02-10 2020-11-10 General Electric Company Wing leading edge features to attenuate propeller wake-wing acoustic interactions

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CN109229278B (zh) * 2018-09-27 2021-03-05 广船国际有限公司 一种船舶减振结构及船舶
JP7250659B2 (ja) 2019-10-30 2023-04-03 株式会社丸山製作所 ブームスプレーヤ

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WO2018156165A1 (en) * 2017-02-27 2018-08-30 General Electric Company Downstream surface features to attenuate propeller wake acoustic interactions

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CN106458307A (zh) 2017-02-22
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