KR102016744B1 - Torsional damping apparatus for propulsion shaft of ship - Google Patents

Torsional damping apparatus for propulsion shaft of ship Download PDF

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Publication number
KR102016744B1
KR102016744B1 KR1020130087461A KR20130087461A KR102016744B1 KR 102016744 B1 KR102016744 B1 KR 102016744B1 KR 1020130087461 A KR1020130087461 A KR 1020130087461A KR 20130087461 A KR20130087461 A KR 20130087461A KR 102016744 B1 KR102016744 B1 KR 102016744B1
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South Korea
Prior art keywords
propulsion shaft
ship
damper
mass
stress
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KR1020130087461A
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Korean (ko)
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KR20150012077A (en
Inventor
김윤환
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한국조선해양 주식회사
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H23/00—Transmitting power from propulsion power plant to propulsive elements
    • B63H23/32—Other parts
    • B63H23/34—Propeller shafts; Paddle-wheel shafts; Attachment of propellers on shafts
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

Disclosed is a propulsion shaft torsion damping device for a ship.
The present invention is a damper for connecting the propeller connected to the propeller is connected to one side and the drive shaft of the engine is connected to the other side to absorb the torsional vibration of the rotation; And an adjusting unit connected to the damper so as to prevent at least a torsional stress from occurring on the propulsion shaft. It may include.

Description

Torsion attenuation device of ship's propulsion shaft {TORSIONAL DAMPING APPARATUS FOR PROPULSION SHAFT OF SHIP}

The present invention relates to a device for attenuating torsional vibration generated in the propulsion shaft during the operation of the ship, and more particularly to a propulsion shaft torsion damping device of the ship that can detect and control it so as not to generate a predetermined or more torsional stress on the propulsion shaft It is about.

The ship is equipped with one or more engines. For example, a ship is provided with a propulsion device such as a diesel engine or an electric propulsion motor. The engine is then connected to a propeller shaft connected to the propeller. Therefore, the propeller rotates as the propulsion shaft is rotated by the driving of the engine. Then, the propulsion force is provided to the ship by the rotation of the propeller to operate the ship at sea.

Meanwhile, ice, such as the Arctic Ocean, may exist on the sea at which the vessel operates. As such, when ice is present at sea, the ice strikes the propeller. Then, the rotation of the propeller or the propulsion shaft is hindered to generate shock and vibration, which causes torsional stress on the propulsion shaft. That is, as the rotation of the propeller or the propulsion shaft is interrupted by the ice, a force in a direction opposite to the rotational force transmitted from the engine acts on the propulsion shaft and a torsional stress is generated on the propulsion shaft.

In addition, when a large or large amount of ice strikes the propulsion shaft or a resonance occurs in the propulsion shaft, there is a problem that excessive torsional stress occurs on the propulsion shaft. As described above, when the torsional stress generated in the propulsion shaft is equal to or greater than a predetermined value, there is a problem that an abnormality occurs in rotation of the propulsion shaft or a defect occurs in the propulsion shaft. In addition, there is a problem that the propulsion shaft may be partially or entirely damaged.

Domestic Patent Publication No. 2012-0137682 (2012.12.24.published) Domestic Publication No. 2006-0033420 (published Apr. 19, 2006)

The present invention is made by recognizing at least any one of the above-mentioned demands or problems.

One aspect of the object of the present invention is to detect the torsional vibration generated in the propulsion shaft of the ship and to actively control it.

Another aspect of the object of the present invention is to prevent abnormalities or defects in the rotation of the propulsion shaft when the ship moves on the sea with obstacles such as ice.

The propulsion shaft torsion damping device of a ship according to an embodiment for realizing at least one of the above problems may include the following features.

The present invention is basically based on preventing a predetermined or more torsional stress from occurring on the skew flow shaft of the ship.

Propulsion shaft torsion damping device of a ship according to an embodiment of the present invention is a damper for connecting the propeller connected to the propeller is connected to one side and the drive shaft of the engine is connected to the other side to absorb the torsional vibration according to the rotation; And an adjusting unit connected to the damper so as to prevent a predetermined or more torsional stress from occurring on the propulsion shaft. It may include.

In this case, the control unit includes an actuator connected to the damper to adjust the torsional vibration absorbed by the damper; It may include.

In addition, the control unit is a stress sensor for measuring the torsional stress of the propulsion shaft; And a controller configured to operate the actuator according to the torsional stress measured by the stress sensor. It may further include.

The control unit includes a speed sensor for measuring a rotational speed of the propulsion shaft; It may further include.

In addition, the damper may include a first urine body connected to a drive shaft of the engine; And a second mass connected to the propulsion shaft; A plurality of elastic members connected to the first mass and the second mass; It may include.

In addition, the elastic member is made of a material of varying rigidity when the electromagnetic energy is supplied, the second mass is accommodated in the first mass, the receiving space is formed by the cover is formed, the viscosity is changed when the electromagnetic energy is supplied to the receiving space The oil is received, the actuator can supply electromagnetic energy to the elastic member and the oil.

As described above, according to the embodiment of the present invention, it is possible to detect the torsional vibration generated in the propulsion shaft of the ship, including the damper and the control unit and to actively control it.

In addition, according to an embodiment of the present invention, it is possible to prevent the abnormality in the rotation of the propulsion shaft or the defect does not occur when the vessel moves in the sea with the obstacles such as ice.

1 is a view showing the configuration of an embodiment of a propulsion shaft torsion damping device of a ship according to the present invention.
Figure 2 is an exploded view showing a schematic configuration of a damper included in an embodiment of a propulsion shaft torsion damping device of a ship according to the present invention.
3 is a view showing the operation of the damper shown in FIG.

In order to help the understanding of the features of the present invention as described above, it will be described in more detail with respect to an embodiment of the propulsion shaft torsion damping device of the ship related to the embodiment of the present invention.

Hereinafter, the described embodiments will be described based on the embodiments best suited for understanding the technical features of the present invention, and the technical features of the present invention are not limited by the described embodiments. It is intended to illustrate that the invention can be implemented as described embodiments. Accordingly, the present invention may be modified in various ways within the technical scope of the present invention through the embodiments described below, and the modified embodiments fall within the technical scope of the present invention. And, hereinafter, in order to help the understanding of the embodiments described, in the reference numerals described in the accompanying drawings, among the components that will have the same function in each embodiment is represented by the same or an extension line number.

Embodiments related to the present invention are basically based on preventing a predetermined or more torsional stress from occurring on the propulsion shaft of the ship.

1 is a view showing the configuration of an embodiment of the propulsion shaft torsion damping device of the ship according to the present invention, Figure 2 is a schematic configuration of a damper included in an embodiment of the propulsion shaft torsion damping device of the ship according to the present invention 3 is an exploded view, and FIG. 3 is a view showing the operation of the damper shown in FIG.

The propulsion shaft torsion damping device 100 of the ship according to the present invention may include a damper 200 and an adjusting unit 300 as shown in the embodiment shown in FIG.

As in the embodiment shown in Figure 1, the damper 200 may be connected to one side of the propulsion shaft (S) connected to the propeller (P) of the vessel. In addition, the drive shaft (D) of the engine (not shown) provided in the vessel (not shown) may be connected to the other side. In addition, the torsional vibration caused by the rotation of the propulsion shaft S and the driving shaft D may be absorbed and attenuated.

To this end, the damper 200 may include a first mass body 210, a second mass body 220, and a plurality of elastic members 230, as shown in the embodiment illustrated in FIG. 2.

The first mass body 210 may be connected to the drive shaft D of the engine. Connection holes 212 may be formed in the first mass body 210. In addition, the driving shaft D of the engine may be inserted into the connection hole 212 of the first mass body 210 to be connected to the first mass body 210. Therefore, as shown in FIG. 3, when the driving shaft D is rotated, the first mass 210 may be rotated.

In addition, the second mass body 220 may be connected to the propulsion shaft (S). The connection hole 222 may also be formed in the second mass body 220. In addition, the propulsion shaft S may be inserted into the connection hole 222 of the second mass body 220 to be connected to the second mass body 220. As a result, when the second mass 220 is rotated as shown in FIG. 3, the propulsion shaft S may be rotated.

The plurality of elastic members 230 may be connected to the first mass body 210 and the second mass body 220. To this end, an accommodation space 213 may be formed in the first mass body 210 as shown in FIG. 2, and an inner protrusion portion protruding from the outer circumference of the first mass body 210 to the accommodation space 213 ( A plurality of 211 may be formed in the accommodation space (213). In addition, a plurality of outer protrusions 221 may be formed on an outer circumference of the second mass body 220.

3, the inner protruding portion 211 of the first mass 210 and the outer protruding portion 221 of the second mass 220 are alternately disposed in the accommodation space 213 of the first mass 210. The second mass 220 may be inserted. In this state, the elastic member 230 may be connected to the inner protrusion 211 of the first mass body 210 and the outer protrusion 221 of the second mass body 220.

The elastic member 230 may be a coil spring. However, the elastic member 230 is not limited to the coil spring, and any known one can be used as long as it is an elastic member.

In addition, the damper 200 may further include a cover 240 as shown in the embodiment shown in FIG. The cover 240 may be formed on the first mass body 210 and may be connected to the first mass body 210 to cover an open side of the accommodation space 213 into which the second mass body 220 is inserted. Accordingly, the accommodation space 213 of the first mass body 210 may be sealed. In addition, the oil may be accommodated in the accommodation space 213 of the sealed first mass body 210.

With this configuration, when the drive shaft D of the engine is rotated as shown in FIG. 3, one of the elastic members 230 connected to both sides of the inner protrusion 211 of the first mass 210 is compressed and the other Is tensioned. Accordingly, an elastic restoring force is generated in the elastic member 230 to act on the outer protrusion 221 of the second mass 220. Then, the propulsion shaft S is rotated.

The shock and vibration generated from the driving shaft D or the driving shaft S during the rotation of the driving shaft D and the driving shaft S, for example, the torsional vibration, are not transmitted to the driving shaft S or the driving shaft D, and the damper ( It may be absorbed and attenuated by the oil contained in the elastic member 230 and the damper 200 of the 200.

The adjusting unit 300 may be linked to the damper 200. In addition, it can be adjusted so that a predetermined or more torsional stress does not occur in the propulsion shaft (S). By the adjusting unit 300, when the ship moves in the sea with obstacles such as ice, the torsional vibration generated in the propulsion shaft (S) so as not to generate a predetermined or more torsional stress on the propulsion shaft (S) and actively Can be controlled. In addition, when the vessel moves in the sea with an obstacle such as ice, it is possible to prevent abnormality or rotation of the propulsion shaft S from occurring.

As shown in FIG. 1, the adjusting unit 300 may include an actuator 310. The actuator 310 may be connected to the damper 200 to adjust the torsional vibration absorbed by the damper 200.

To this end, the elastic member 230 of the damper 200 may be made of a material whose rigidity is different when electromagnetic energy is supplied. In addition, in the receiving space 213 of the first mass body 210, an oil having a different viscosity may be accommodated when electromagnetic energy is supplied. For example, the oil accommodated in the accommodation space 213 of the first mass body 210 may be electromagnetic oil oil.

However, the material or oil of the elastic member 230 is not particularly limited, and any known material can be used as long as the stiffness or viscosity is changed when electromagnetic energy is supplied.

The actuator 310 may supply electromagnetic energy to the elastic member 230 and oil. In order to supply electromagnetic energy to the elastic member 230 and the oil, the actuator 310 may be electromagnetically connected to the elastic member 230 and the oil. That is, the actuator 310 may be connected to the elastic member 230 and the oil by wire or wireless.

The configuration of the actuator 310 is not particularly limited, and any configuration known in the art can be used as long as it can supply electromagnetic energy to the elastic member 230 and oil.

Therefore, when a torsional stress of at least a predetermined amount is generated in the propulsion shaft S, electromagnetic energy may be supplied to the elastic member 230 and the oil by the actuator 310.

By varying the rigidity of the elastic member 230 and the viscosity of the oil, the natural frequency of the propulsion shaft S system including the damper 200 including the elastic member 230 and the oil may be changed. Thereby, even if ice or the like strikes the propulsion shaft S and the rotation speed of the propulsion shaft S changes, the rigidity of the elastic member 230 is caused by the actuator 310 so that resonance due to the propulsion shaft S system does not occur. The natural frequency of the propulsion shaft system can be controlled by adjusting the viscosity of oil and oil. Therefore, it is possible to prevent the propulsion shaft S from generating a predetermined or more torsional stress due to resonance.

In addition, when the viscosity of the oil is increased by the supply of electromagnetic energy by the actuator 310, the shock and vibration that can be absorbed by the damper 200, for example, the torsional vibration may be increased. Thereby, a larger torsional vibration can be absorbed by the damper 200, and it can prevent that a predetermined or more torsional stress does not generate | occur | produce in the propulsion shaft S. FIG.

The adjusting unit 300 may further include a stress sensor 320 and a control unit 330 as shown in FIG. 1.

The stress sensor 320 may measure the torsional stress of the propulsion shaft (S). For example, the stress sensor 320 may be a strain gauge attached to the propulsion shaft S to measure the torsional stress. However, the stress sensor 320 is not particularly limited and any known one can be used as long as the torsional stress of the propulsion shaft S can be measured.

The controller 330 may operate the actuator 310 according to the torsional stress measured by the stress sensor 320. To this end, the controller 330 may be electrically connected to the stress sensor 320 and the actuator 310. Torsional stress of the propulsion shaft S measured by the stress sensor 320 may be converted into an electrical signal and sent to the controller 330. In addition, the controller 330 may transmit an electric signal corresponding to the actuator 310 when the torsion stress is greater than or equal to a predetermined value according to the programmed content. As such, the actuator 310 may supply electromagnetic energy to the elastic member 230 and the oil of the damper 200 by the electric signal sent from the controller 330.

The adjusting unit 300 may further include a speed sensor 340. The rotational speed of the propulsion shaft S may be measured by the speed sensor 340. In addition, the rotational speed of the propulsion shaft S measured by the speed sensor 340 may be converted into an electrical signal and sent to the controller 300. To this end, as in the embodiment shown in Figure 1, the speed sensor 340 may be electrically connected to the controller 300.

The speed sensor 340 is not particularly limited and may be any known one as long as the speed of the propulsion shaft S can be measured.

Depending on the rotational speed of the propulsion shaft (S) may be a value of the torsional stress allowed for the propulsion shaft (S). Therefore, the controller 300 may determine whether the torsion stress value of the propulsion shaft S transmitted from the stress sensor 320 is an allowable torsion stress value at the rotational speed of the propulsion shaft S transmitted from the speed sensor 340. . And, if the measured torsion stress value of the propulsion shaft S at the measured rotation speed is not an acceptable value, the actuator 310 may be operated.

As described above, when the propulsion shaft torsion damping device of the ship according to the present invention is used, the torsional vibration generated in the propulsion shaft of the ship can be detected and actively controlled, and the propulsion shaft when the ship moves in the sea with obstacles such as ice. It is possible to prevent abnormality or defects from occurring in the rotation.

Propulsion shaft torsion damping device of the vessel described as described above is not limited to the configuration of the above-described embodiment, the embodiments are configured by selectively combining all or part of each embodiment so that various modifications can be made May be

100: ship propulsion shaft torsion damping device 200: damper
210: first mass 211: inner protrusion
212, 222: connection hole 213: accommodation space
220: second mass 221: outer protrusion
230: elastic member 240: cover
241: through hole 300: control unit
310: actuator 320: stress sensor
330 control unit 340 speed sensor
P: Propeller S: Propulsion Shaft
D: drive shaft

Claims (6)

A damper connected to one side of the propeller connected to the propeller, and a drive shaft of the engine connected to the other side to absorb the torsional vibration due to rotation; And
An adjusting unit connected to the damper so as to prevent a predetermined or more torsional stress from occurring on the propulsion shaft; Including;
The control unit includes an actuator connected to the damper to adjust the torsional vibration absorbed by the damper; Propulsion shaft torsion attenuation device of the ship comprising a. delete According to claim 1, wherein the control unit A stress sensor for measuring the torsional stress of the propulsion shaft; And
A control unit for operating the actuator according to the torsional stress measured by the stress sensor; Propulsion shaft torsion damping device of the ship further comprising. According to claim 3, wherein the control unit Speed sensor for measuring the rotational speed of the propulsion shaft; Propulsion shaft torsion damping device of the ship further comprising. The method of claim 1, wherein the damper
A first mass connected to a drive shaft of the engine;
A second mass connected to the propulsion shaft; And
A plurality of elastic members connected to the first mass and the second mass;
Propulsion shaft torsion attenuation device of the ship comprising a. The method of claim 5, wherein the elastic member is made of a material that changes the rigidity when the electromagnetic energy is supplied,
The second mass is accommodated in the first mass is formed in the receiving space is sealed by a cover, the receiving space is accommodated in the oil is changed viscosity when the electromagnetic energy is supplied,
The actuator is a propulsion shaft torsion damping device of the ship for supplying electromagnetic energy to the elastic member and the oil.
KR1020130087461A 2013-07-24 2013-07-24 Torsional damping apparatus for propulsion shaft of ship KR102016744B1 (en)

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Cited By (1)

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CN110888464A (en) * 2019-11-12 2020-03-17 上海交通大学 Longitudinal and transverse multi-mode vibration control device and method for variable-speed propeller shaft system

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CN105468046B (en) * 2016-01-08 2017-08-11 中国船舶重工集团公司第七0四研究所 The many branched power local vibration control methods of ship basic propulsion system
KR102269064B1 (en) 2019-10-22 2021-06-24 한국조선해양 주식회사 Apparatus for supporting rotating shaft and method for supportiing rotating shaft
KR102276829B1 (en) * 2020-01-10 2021-07-12 고갑석 Device for protecting ship propell system
KR20230122373A (en) 2022-02-14 2023-08-22 에이치디현대중공업 주식회사 Vessel propulsion shaft torsional vibration reduction apparatus and reduction method
CN117469339B (en) * 2023-12-28 2024-03-08 中闽(福清)风电有限公司 Variable-rigidity variable-damping magnetorheological vibration absorber control method applied to propulsion shaft system

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KR100608567B1 (en) * 2004-07-29 2006-08-03 현대자동차주식회사 Damper Assembly of propeller-shaft
KR100588341B1 (en) * 2004-09-07 2006-06-14 (주)한국시엠알 A device for controlling torsional vibration of a shafting for a marine engine
KR100629228B1 (en) 2004-10-15 2006-09-27 (주)한국시엠알 A device for reducing vibration of a shafting for a marine engine
KR101313594B1 (en) 2011-06-13 2013-10-01 삼성중공업 주식회사 Propulsion apparatus for ship and ship having the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110888464A (en) * 2019-11-12 2020-03-17 上海交通大学 Longitudinal and transverse multi-mode vibration control device and method for variable-speed propeller shaft system
CN110888464B (en) * 2019-11-12 2021-06-04 上海交通大学 Longitudinal and transverse multi-mode vibration control device and method for variable-speed propeller shaft system

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