KR20160029917A - Damper for decreasing vibration of main engine - Google Patents

Damper for decreasing vibration of main engine Download PDF

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Publication number
KR20160029917A
KR20160029917A KR1020140118674A KR20140118674A KR20160029917A KR 20160029917 A KR20160029917 A KR 20160029917A KR 1020140118674 A KR1020140118674 A KR 1020140118674A KR 20140118674 A KR20140118674 A KR 20140118674A KR 20160029917 A KR20160029917 A KR 20160029917A
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KR
South Korea
Prior art keywords
housing
main engine
coupled
hull
coil
Prior art date
Application number
KR1020140118674A
Other languages
Korean (ko)
Inventor
강옥현
Original Assignee
현대중공업 주식회사
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Filing date
Publication date
Application filed by 현대중공업 주식회사 filed Critical 현대중공업 주식회사
Priority to KR1020140118674A priority Critical patent/KR20160029917A/en
Publication of KR20160029917A publication Critical patent/KR20160029917A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/30—Mounting of propulsion plant or unit, e.g. for anti-vibration purposes
    • 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
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically

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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)
  • Electromagnetism (AREA)
  • Vibration Prevention Devices (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

The damper for attenuating main engine vibration according to an embodiment of the present invention includes a housing in which a magnetorheological fluid is accommodated and one side is coupled to a hull of a ship; A center shaft coupled through the housing, one end coupled to the periodic observation and the other end exposed to the outside of the housing and provided as a free end; And a piston provided on the inner side of the housing and coupled to the center shaft, wherein a coil is wound on an outer circumferential surface of the housing, and a particle chain is formed between the housing and the piston when a current is applied to the coil .

Description

[0001] The present invention relates to a damper for decreasing vibration of main engine,

The present invention relates to a damper for reducing main engine vibration, and more particularly, to a damper for damping main engine vibration damping which is connected between a main engine (main engine) of a ship and a hull to attenuate vibration transmitted from a main engine to a deck house To a damping damper for main engine vibration reduction using a magnetorheological fluid.

The main engine (main engine) of the ship causes severe vibration during operation, and the vibration of such main engine is transmitted to the hull where the deck house is located. Therefore, various structures provided on the hull are damaged by vibration, and in particular, the feeling of boarding in a residence is greatly reduced by vibration.

Accordingly, the ship is provided with a top bracing apparatus for relieving the vibration transmitted to the hull from the main engine.

The conventional top bracing system reduces the lateral vibration transmitted from the main engine to the hull by changing the connection stiffness between the main engine and the hull by the fluid pressure of the high pressure chamber defined by the cylinder and the piston, .

Most top bracing devices are sealed in their own high-pressure chambers with fluids such as oil or pressurized gas being filled to a certain pressure. Therefore, the top bracing device did not respond to the change of various operating conditions of the ship.

In addition, in the conventional top bracing apparatus, leakage of fluid from the high-pressure chamber occurs due to aging of the ship, which results in changing the initial vibration damping characteristic of the top bracing apparatus, resulting in deterioration of the apparatus performance.

Therefore, a means for controlling the vibration of the main engine is required in place of the above-mentioned top bracing.

An object of the present invention is to provide a damper for main engine vibration damping which is capable of reducing vibration of a main engine using a magnetorheological fluid.

The damper for attenuating main engine vibration according to an embodiment of the present invention includes a housing in which a magnetorheological fluid is accommodated and one side is coupled to a hull of a ship; A center shaft coupled through the housing, one end coupled to the periodic observation and the other end exposed to the outside of the housing and provided as a free end; And a piston provided on the inner side of the housing and coupled to the center shaft, wherein a coil is wound on an outer circumferential surface of the housing, and a particle chain is formed between the housing and the piston when a current is applied to the coil .

In the damping damper for main engine vibration damping according to an embodiment of the present invention, the housing may include a coil winding portion formed to be embedded in the outer circumferential surface of the housing so that the coil is wound.

In the damping damper for main engine vibration damping according to an embodiment of the present invention, at least one of the coil winding portions may be provided on the outer circumferential surface of the housing.

In the damper for main engine vibration damping according to an embodiment of the present invention, one end of the central shaft and the main engine are coupled by a spherical joint portion, and the spherical joint portion includes a pair of A joint housing, an inner ball inserted into the pair of joint housings and rotating, and a rod connecting the inner balls.

In the damping damper for main engine vibration damping according to an embodiment of the present invention, through-holes through which the center shaft passes are provided at centers of both sides of the housing, and O-rings may be provided in the through holes.

In the damping damper for main engine vibration damping according to an embodiment of the present invention, a protrusion formed on one side of the housing along the rim of the housing to have a protruding engaging portion for engaging with the hull, and the other end of the center shaft is disposed inside the protruding engaging portion Can be located.

In the damping damper for main engine vibration damping according to an embodiment of the present invention, a side of the hull which faces the center axis may be provided with a collision avoiding part which can be collapsed inside the hull to avoid collision with the center axis.

In the damper for main engine vibration damping according to an embodiment of the present invention, the central axis may be provided as a non-magnetic body.

According to the damper for main engine vibration damping according to the embodiment of the present invention, vibration can be damped effectively by using a magnetorheological fluid.

Further, since the coil is provided on the outer circumferential surface of the housing, the winding of the coil can be easily replaced and repaired.

1 is a schematic sectional view of a main damper vibration damping damper according to an embodiment of the present invention.
2 is a partially enlarged view of a section in which a part chain is formed when a current is applied to a coil of a main damper vibration damping damper according to an embodiment of the present invention.
3 is a schematic sectional view showing a state in which a spherical joint portion of a damper for reducing main engine vibration is moved according to an embodiment of the present invention.

Prior to the detailed description of the present invention, the terms or words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings, and the inventor may designate his own invention in the best way It should be construed in accordance with the technical idea of the present invention based on the principle that it can be appropriately defined as a concept of a term to describe it. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents It should be understood that water and variations may be present.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that, in the drawings, the same components are denoted by the same reference symbols as possible. Further, the detailed description of known functions and configurations that may obscure the gist of the present invention will be omitted. For the same reason, some of the elements in the accompanying drawings are exaggerated, omitted, or schematically shown, and the size of each element does not entirely reflect the actual size.

FIG. 1 is a schematic cross-sectional view of a damper for main engine vibration damping according to an embodiment of the present invention. FIG. 2 is a sectional view of a particle chain when a current is applied to a coil of a damper for main engine vibration damping according to an embodiment of the present invention. FIG. 3 is a schematic cross-sectional view showing a state in which a spherical joint portion of a damper for reducing main engine vibration is moved according to an embodiment of the present invention.

1 to 3, a damper 500 for reducing main engine vibration according to an embodiment of the present invention includes a housing 30 in which a magnetorheological fluid 30 is accommodated and one side thereof is coupled to a hull 20 of a ship, (100) may be provided.

Here, the housing 100 may have a protruding engaging portion 110 protruding from a side of the housing 100 to engage with the hull 20, and the inner side of the protruding engaging portion 110 and the inner side of the hull The inner space S may be formed.

A through hole 1200 through which a center shaft 200 to be described later passes may be provided at the centers of both longitudinal sides of the housing 100. An O-ring 121 may be provided at a portion where the through hole 120 and the center shaft 200 are in contact with each other. ) Can be interposed.

The O-ring 121 prevents the magnetorheological fluid 30 from flowing out into a gap between the housing 100 and the center shaft 200, and may be made of a rubber material, for example.

The term 'longitudinal direction' of the housing 100 refers to a direction from one side of the housing 100 coupled with the hull 20 to the other side, or vice versa, with reference to FIG.

A coil 40 may be wound on the outer circumferential surface of the housing 100 and a particle chain 31 may be provided on the inner side of the housing 100 where a magnetic field 50 is formed when a current is applied to the coil 40. [ .

Specifically, the particle chain 31 may be provided between the housing 100 and a piston 300, which will be described later, and may support vibration generated in the periodic observation. A detailed description thereof will be described later.

The outer circumferential surface of the housing 100 may be provided with a coil winding portion 130 for winding the coil 40. The coil winding portion 130 may be formed by impregnating the outer circumferential surface of the housing 100. [

In addition, at least one coil winding portion 130 may be provided on the outer circumferential surface of the housing 100.

Here, the damper 500 for main engine vibration damping according to an embodiment of the present invention can easily wind the coil 40 by providing the coil winding portion 130 on the outer circumferential surface of the housing 100, 40), there is an effect of facilitating replacement and repair.

The center shaft 200 passes through the through hole 120 of the housing 100 and has one end coupled to the periodic observation and the other end exposed to the outside of the housing 100 to be provided as a free end.

Here, a spherical joint part 400 may be coupled between one end of the central shaft 200 and the main engine 10. [

Specifically, the spherical joint unit 400 includes a pair of joint housings 410 coupled to the central axis 200 and the main engine 10, An inner ball 420 inserted into the pair of housings 410 to rotate and a rod 430 connecting the inner balls 420.

That is, the inner ball 420 may be coupled to both ends of the rod 430, and the inner ball 420 may be inserted into the joint housing 410 and rotated.

The spherical joint portion 400 is provided to prepare for the case where the hull 20 is contracted by the water pressure, so that even when the hull 20 is contracted by water pressure due to the water being submerged in the water, the spherical joint portion 400 can prevent the center shaft 200 from being twisted. It is noted that the spherical joint portion 400 can be changed into various joint portions connecting the central axis 200 and the main engine 10. [

The other end of the center shaft 200 penetrates through the through hole 120 of the housing 100 and is inserted into the inside of the projecting engagement portion 110, that is, between the projecting engagement portion 110 and the hull 20 And can be located in the space S.

In addition, the central axis 200 may be formed of a non-magnetic material, for example, aluminum. This is to prevent the magnetism from being transmitted to the outside when a current is applied to the coil 320 to be described later.

The piston 300 is inserted into the central shaft 200 and coupled to the housing 100. When a current is applied to the coil 40, the magnetic field 50 is transmitted to the piston 300 and / Can be formed over the housing 100 (see Fig. 2).

That is, when the current is applied to the coil 40, the particle chain 31 can be formed along the section where the magnetic field 50 is formed, and plays the role of supporting the vibration generated in the main engine 10 .

The collision skin 21 may be provided on one side of the hull 20 facing the free end of the central axis 200 to avoid collision with the center axis 200 by being collapsed inside the hull 20 .

That is, when vibration occurs in the main engine 10 or when the hull 20 is contracted by water pressure, the center axis 200 can move in the longitudinal direction, It is possible to prevent the collision between the hull and the center shaft 200 by providing a space in which the free end can be accommodated.

Hereinafter, the operation of the damper for damping main engine 100 according to an embodiment of the present invention will be described.

When the main engine 10 of the ship is driven, vibration is generated, and current can be applied to the coil 40 at this time.

When a current is applied to the coil 40, a magnetic field 50 is generated by an applied current. As shown in FIG. 2, a particle chain 31 may be formed at a portion where the magnetic field 50 is formed.

Accordingly, the piston 300 can be supported by the particle chain 31 to limit its movement.

In addition, since the magnitude of the vibration generated in the main engine 10 is not constant, the binding of the particle chain 31 can be temporarily released when the magnitude of vibration is larger than the binding force of the particle chain 31, 300 can be moved forward / backward in the longitudinal direction. In this case, the piston 300 returns to its original position due to the buffering action of the magnetorheological fluid 30 provided in the housing 100.

As a result, the vibration generated in the main engine 10 in the binding and releasing process of the particle chain 31 can be attenuated, and the amount of vibration transmitted to the habitat can be reduced.

On the other hand, when the ship is submerged in water, the ship 20 can be contracted by water pressure. At this time, the spherical joint part 400 is provided to prevent the center shaft 200 from being twisted by the shrunken hull 20.

3, the inner ball 420 and the rod 430 are rotated to prevent the center shaft 20 from being twisted, and when the main engine vibrates, The damping damper 500 can attenuate the vibration transmitted from the main engine 10 by the particle chain 31 in this state.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be apparent to those of ordinary skill in the art that such changes or modifications are within the scope of the appended claims.

10: Main engine 20: Hull
30: magnetorheological fluid 40: coil
50: magnetic field 100: housing
110: protruding engaging portion 120: through hole
130: coil winding part 200: center axis
300: piston 400: spherical joint part

Claims (8)

A housing in which a magnetorheological fluid is accommodated and one side is coupled to the hull of the ship;
A center shaft coupled through the housing, one end coupled to the periodic observation and the other end exposed to the outside of the housing and provided as a free end; And
And a piston provided inside the housing and engaged with the central axis,
Wherein a coil is wound on an outer circumferential surface of the housing and a particle chain is formed between the housing and the piston when a current is applied to the coil.
The method according to claim 1,
Wherein the housing is provided with a coil winding portion formed in an outer peripheral surface of the housing so that the coil is wound.
The method according to claim 1,
Wherein at least one of the coil winding portions is provided on an outer circumferential surface of the housing so as to be spaced apart from each other.
The method according to claim 1,
Wherein one end of the central shaft and the main engine are coupled by a spherical joint portion, the spherical joint portion includes a pair of joint housings coupled to the central shaft and the main engine, And a rod connecting the ball and each of the inner balls.
The method according to claim 1,
Wherein a through hole is formed in the center of both sides of the housing and the center shaft passes through the through hole, and an O-ring is provided in the through hole.
The method according to claim 1,
Wherein the housing has a protruding coupling portion protruding along the rim of the housing to engage with the hull, and the other end of the central shaft is located inside the protruding coupling portion.
The method according to claim 1,
And a collision avoiding portion which is recessed inside the hull to avoid collision with the center shaft, is provided at one side of the hull which faces the center axis.
The method according to claim 1,
And the central axis is a non-magnetic body.
KR1020140118674A 2014-09-05 2014-09-05 Damper for decreasing vibration of main engine KR20160029917A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020140118674A KR20160029917A (en) 2014-09-05 2014-09-05 Damper for decreasing vibration of main engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140118674A KR20160029917A (en) 2014-09-05 2014-09-05 Damper for decreasing vibration of main engine

Publications (1)

Publication Number Publication Date
KR20160029917A true KR20160029917A (en) 2016-03-16

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Family Applications (1)

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KR1020140118674A KR20160029917A (en) 2014-09-05 2014-09-05 Damper for decreasing vibration of main engine

Country Status (1)

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KR (1) KR20160029917A (en)

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