KR20150111424A - Apparatus for reducing vibration of engine - Google Patents

Apparatus for reducing vibration of engine Download PDF

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Publication number
KR20150111424A
KR20150111424A KR1020140033529A KR20140033529A KR20150111424A KR 20150111424 A KR20150111424 A KR 20150111424A KR 1020140033529 A KR1020140033529 A KR 1020140033529A KR 20140033529 A KR20140033529 A KR 20140033529A KR 20150111424 A KR20150111424 A KR 20150111424A
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KR
South Korea
Prior art keywords
engine
hydraulic
vibration
hull
pressure
Prior art date
Application number
KR1020140033529A
Other languages
Korean (ko)
Inventor
김보수
김병기
김병철
구대홍
Original Assignee
현대중공업 주식회사
(주)한미유압기계
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
Application filed by 현대중공업 주식회사, (주)한미유압기계 filed Critical 현대중공업 주식회사
Priority to KR1020140033529A priority Critical patent/KR20150111424A/en
Publication of KR20150111424A publication Critical patent/KR20150111424A/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
    • F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial

Abstract

The present invention relates to a device for reducing the vibration of an engine, comprising: a piston rod (10) connected to the engine (5) and having a partition plate (11) arranged thereon; a cylinder (20) containing the partition plate (11) of the piston rod (10), having first and second hydraulic chambers (21, 22) arranged therein, and connected to the body of a ship (7); first and second flow paths (31, 32) connected to the first and second hydraulic chambers (21, 22) respectively; and first and second accumulators (42, 42) connected to the first and second flow paths (31, 32), so as to reduce the vibration of the engine (5) transmitted to the body of the ship (7) by being arranged between the engine (5) and the body of the ship (7). Therefore, space utilization with respect to the whole body of a ship is facilitated by omitting the installation of devices for reducing vibration on the other side of an engine and the body of a ship and securing a space therefor. Also, costs can be reduced by installing the device for reducing vibration on one side of an engine instead of both sides of the engine, and reducing the number of the devices for reducing vibration.

Description

[0001] The present invention relates to a vibration damping device for an engine,

The present invention relates to a vibration damping device for an engine, and more particularly, to a vibration damping device for an engine, comprising first and second hydraulic chambers which are disposed between one side of an engine and a hull, The first and second hydraulic chambers are provided with first and second accumulators for adjusting the hydraulic pressure, respectively, so as to attenuate the vibration of the engine from being transmitted to the hull by only one connecting cylinder.

In general, the engine used in a large-sized ship has a large output. Therefore, when the vibration generated by the engine is transmitted to the hull as it is, the vibration of the hull is increased to lower the durability of the peripheral device. A vibration damping device is used to reduce the amount of vibration transmitted to the vehicle.

For example, as shown in FIG. 1, a plurality of hydraulic cylinders 9 are provided between both side walls of the engine 5 and respective hulls 7 corresponding to both sides of the engine 5, as schematically shown in the prior art vibration damping device. So that the vibration of the engine is transmitted to the hull.

The hydraulic cylinder 9 is provided with a hydraulic passage 9a for guiding the hydraulic pressure discharged from the hydraulic cylinder 9 and an accumulator 9b for storing the discharged hydraulic pressure.

However, since the vibration damping device of the prior art has to be provided with vibration damping devices on both side walls of the engine in order to attenuate the vibration of the engine, there is a problem that space utilization on both sides of the engine is basically not easy.

In addition, since a large amount of vibration damping device is required to prevent the vibration of the engine, there is a problem of cost burden due to the installation of a large number of vibration damping devices.

Korean Registered Utility Model No. 20-0407217

SUMMARY OF THE INVENTION The present invention has been conceived to solve such a problem, and it is an object of the present invention to provide first and second hydraulic chambers which are disposed between one side of an engine and a hull, The first and second accumulators for adjusting the hydraulic pressure are provided in the two hydraulic chambers so that the transmission of the vibration of the engine to the hull can be attenuated only by one connecting cylinder, And it is an object of the present invention to provide a vibration damping device for an engine which can secure space for this part while eliminating the installation, thereby facilitating the utilization of space for the entire hull.

Another object of the present invention is to provide a vibration damping device for an engine which can reduce the number of vibration damping devices by reducing the number of vibration damping devices installed on both sides of the engine, .

In order to attain the above object, the vibration damping device for an engine of the present invention is disposed between an engine and a hull so as to attenuate vibration of an engine from being transmitted to a hull, A piston rod provided at the other end thereof with a partition plate; Wherein the first and second partition walls of the piston rod are made to pass through the first and second ends of the partition wall, A cylinder having a hydraulic chamber and the other end connected to the hull; First and second flow paths connected to the first and second hydraulic chambers to guide the first and second hydraulic chamber hydraulic pressures into and out of the cylinder; And first and second accumulators connected to the first and second flow paths to store the hydraulic pressure discharged from the first and second hydraulic chambers.

Further, in the vibration damping device for an engine according to an embodiment of the present invention, the partition plate of the piston rod is pressed against the inner side of the cylinder with the hydraulic pressure being applied to one side of the cylinder, A negative pressure is generated in the other hydraulic chamber so that the hydraulic pressure is sucked into the other hydraulic chamber from the other side accumulator.

Further, in the vibration damping device for an engine according to an embodiment of the present invention, a control valve for controlling a flow rate of hydraulic pressure discharged from the first and second hydraulic chambers may be further provided on the first and second flow paths Lt; / RTI >

Further, in the vibration damping device for an engine according to an embodiment of the present invention, a pressure gauge is further provided on the first and second flow paths to confirm the intensities of the hydraulic pressures discharged from the first and second hydraulic chambers, respectively .

As described above, the vibration damping device for an engine of the present invention is provided with first and second hydraulic chambers which are disposed between one side of an engine and a hull, and partition the internal space of the cylinder into two by a partition plate of a piston rod, The first and second accumulators for adjusting the hydraulic pressure are provided in the first and second hydraulic chambers so that the transmission of the vibration of the engine to the hull can be attenuated by only one connecting cylinder, It is possible to secure a space for this portion as a result of which the space utilization for the entire hull is facilitated.

In addition, since the number of the vibration damping devices is greatly reduced by installing the vibration damping devices on both sides of the engine only on one side of the engine, the cost can be reduced as a result.

1 is a schematic view showing a vibration damping device for an engine according to the prior art.
2 is a schematic view showing an apparatus for vibration damping of an engine according to an embodiment of the present invention.
3 is a schematic view showing the flow of hydraulic pressure in a vibration damping device of an engine according to an embodiment of the present invention when an interval between an engine and a hull is narrowed.
4 is a schematic view showing the flow of hydraulic pressure in a case where an engine and a hull are spaced apart from each other in an engine vibration damping device according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2 to 4, an apparatus for vibration damping of an engine according to an embodiment of the present invention is disposed between an engine 5 and a hull 7 so that vibration of the engine 5 is transmitted to the hull 7 A piston rod 10 connected to the engine 5 and provided with a bulkhead plate 11 for attenuating the piston rod 10 and a first and second oil pressure chambers 21 22 and a first and second oil passages 31 and 32 connected to the first and second oil pressure chambers 21 and 22 and a first and second oil passages 31 and 32 connected to the first and second oil pressure chambers 21 and 22, The first and second accumulators 41 and 42 are connected to the two flow paths 31 and 32, respectively.

The piston rod 10 has an elongated rod structure having one end connected to the engine 5 and the other end of which is provided with a partition plate 11 closely contacting the inner circumferential surface of the cylinder 20.

One end of the piston rod 10 including the partition plate 11 of the piston rod 10 penetrates into one end of the cylinder 20 and the inner space of the cylinder 20 is divided into two parts The first and second oil pressure chambers 21 and 22, which are movable in the left-right direction of the partition plate 11 in a state where the fluid is contained in the inner space on both sides of the partition plate 11, And the other end portion is connected to the hull 7.

The first and second oil passages 31 and 32 are communicated with the first and second oil pressure chambers 21 and 22 at one end thereof and the other end thereof is connected to the first and second oil pressure chambers 21 and 22 through the first and second accumulators 41 and So as to guide the flow of the hydraulic pressure in the first and second hydraulic chambers 21 and 22 and the hydraulic pressure of the first and second accumulator 41 and 42 to each other.

The first and second accumulators 41 and 42 are connected to the first and second oil passages 31 and 32 to store oil pressure discharged from the first and second oil pressure chambers 21 and 22 do.

The partition plate 11 of the piston rod 10 presses the hydraulic pressure to one side of the hydraulic chambers 21 and 22 in a state of being closely arranged on the inner circumferential surface of the cylinder 20 so that the accumulators 41, 42 to cause a negative pressure in the other hydraulic chambers 21, 22 to be sucked into the other hydraulic chambers 21, 22 from the other accumulators 41, .

Control valves 31a and 32a are provided on the first and second oil passages 31 and 32 to control the flow rate of hydraulic pressure discharged from the first and second oil pressure chambers 21 and 22, respectively.

Pressure gauges 31b and 32b are provided on the first and second oil passages 31 and 32 to confirm the oil pressure discharged from the first and second oil pressure chambers 21 and 22, respectively.

It is preferable that the vibration damping device is installed vertically in order to perform a safety vibration function between one side wall of the engine 5 and the hull 7.

The vibration damping device for an engine according to one embodiment of the present invention has a structure in which the partition plate 11 of the piston rod 10 is closely disposed to the inner space of the cylinder 20, The first and second oil passages 31 and 32 are connected to the first and second oil pressure chambers 21 and 22 on both sides of the first and second oil passages 31 and 32 and the first and second oil passages 31 and 32 are connected to the first and second oil passages 31 and 32, (41, 42) are connected to complete the assembly of the vibration damping device of the present invention.

One end of the piston rod 10 of the completed vibration damping device is connected to the engine 5 side and the end of the cylinder 20 opposite thereto is connected to the side of the hull 7.

Here, the vibration damping device may be installed vertically in order to perform a safety vibration function between one side wall of the engine 5 and the hull 7.

When vibration of the engine 5 occurs in this state, the engine 5 side is connected to the first oil pressure chamber 21, the first oil passage 31 and the first oil chamber 31 based on the partition plate 11, Assuming that the side of the hull 7 is the second hydraulic chamber 22, the second flow path 32 and the second accumulator 42, The hydraulic pressure in the first hydraulic chamber 21 is pushed by the movement of the partition plate 11 when the piston rod 10 is moved toward the engine 5, A negative pressure is generated in the second oil pressure chamber 22 which is the other side of the partition plate 11 and the hydraulic pressure of the second accumulator 42 flows through the second oil passage 32 through the second oil passage 32, 2 hydraulic chamber 22 of the hydraulic pump.

On the other hand, when the piston rod 10 moves toward the hull 7, the hydraulic pressure in the second hydraulic chamber 22 is pushed by the movement of the partition plate 11, The negative pressure is generated in the first hydraulic chamber 21 which is the other side of the partition plate 11 and the hydraulic pressure of the first accumulator 41 flows into the first oil passage 31, To the first hydraulic chamber (21).

When the hydraulic pressure is pushed to one side with respect to the partition plate 11, the hydraulic pressure can be sucked into the other side at a high speed to obtain a dustproof effect on the hull 7.

On the other hand, when it is desired to adjust the flow rate between the oil pressure chambers 21 and 22 and the accumulators 41 and 42, the control valves 31a and 32a are appropriately opened and closed to achieve a desired flow rate, .

For example, if the size of the flow paths 31 and 32 is enlarged through the control valves 31a and 32a, the flow rate becomes larger and the left and right movement of the partition plate 11 is performed correspondingly, If the size of the flow paths 31 and 32 is reduced, the flow amount becomes smaller and the left and right movement of the partition plate 11 will be slowed correspondingly.

Further, the pressure gauges 31b and 32b can check the oil pressure intensities on the oil passages 31 and 32 and adjust the hydraulic pressure intensities to appropriate hydraulic pressure intensities, thereby achieving a smooth anti-vibration function.

DESCRIPTION OF REFERENCE NUMERALS
5: Engine 7: Hull
9: Hydraulic cylinder 9a:
9b: accumulator 10: piston rod
11: bulkhead plate 20: cylinder
21: first hydraulic chamber 22: second hydraulic chamber
31: first flow path 31a: regulating valve
31b: pressure gauge 32: second flow path
32a: regulating valve 32b: pressure gauge
41: first accumulator 42: second accumulator

Claims (4)

An apparatus for vibration damping of an engine disposed between an engine and a hull to attenuate transmission of vibration of an engine to a hull,
A piston rod having one end connected to the engine and the other end provided with a diaphragm plate;
Wherein the first and second partition walls of the piston rod are made to pass through the first and second ends of the partition wall, A cylinder having a hydraulic chamber and the other end connected to the hull;
First and second flow paths connected to the first and second hydraulic chambers to guide the first and second hydraulic chamber hydraulic pressures into and out of the cylinder; And
First and second accumulators connected to the first and second flow paths to store the hydraulic pressure discharged from the first and second hydraulic chambers;
And a vibration damping device for vibration damping the vibration of the engine. The method according to claim 1,
When the oil pressure is discharged to one side of the oil pressure chamber in a state in which the partition plate of the piston rod is in close contact with the inner circumferential surface of the cylinder and the oil pressure is discharged by one accumulator, a negative pressure is generated in the other oil pressure chamber, Is a syringe type in which the hydraulic pressure is sucked into the other side of the hydraulic chamber. The method according to claim 1,
Further comprising a control valve for controlling a flow rate of hydraulic pressure discharged from the first and second hydraulic chambers on the first and second flow paths, respectively. The method according to claim 1,
Further comprising a pressure gauge for confirming the intensities of hydraulic pressures discharged from the first and second hydraulic chambers on the first and second flow paths, respectively.
KR1020140033529A 2014-03-21 2014-03-21 Apparatus for reducing vibration of engine KR20150111424A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020140033529A KR20150111424A (en) 2014-03-21 2014-03-21 Apparatus for reducing vibration of engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140033529A KR20150111424A (en) 2014-03-21 2014-03-21 Apparatus for reducing vibration of engine

Publications (1)

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KR20150111424A true KR20150111424A (en) 2015-10-06

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KR1020140033529A KR20150111424A (en) 2014-03-21 2014-03-21 Apparatus for reducing vibration of engine

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111577826A (en) * 2020-03-31 2020-08-25 上海卫星工程研究所 Slender long-stroke crushing type anti-rebound multistage anti-overload buffering structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111577826A (en) * 2020-03-31 2020-08-25 上海卫星工程研究所 Slender long-stroke crushing type anti-rebound multistage anti-overload buffering structure

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