KR102043877B1 - A damping device with adjustable damping coefficient - Google Patents

Abstract

In accordance with a preferred embodiment of the present invention, the damping device capable of adjusting the damping coefficient is provided with a discharge suction unit or a bypass pipe, and can be applied to model tests of offshore structures. In addition, a damping device that can actively change the attenuation coefficient according to the speed of the model ship or the tide may be provided.

Description

Damping device with adjustable damping coefficient {A DAMPING DEVICE WITH ADJUSTABLE DAMPING COEFFICIENT}

The present invention relates to a damper, and more particularly to a damping device capable of adjusting the damping coefficient.

Loads on offshore structures are caused by various factors such as waves, currents, wind and earthquakes. The relative magnitudes of these loads and their effects on the structure depend on the type and form of the structure and the environment of the sea area. In general, wave loading is the dominant factor that determines the design and dynamic behavior of structures. In most cases, the load due to currents is less than about 10-15% of the load due to waves. For structures built in Arctic waters, glacier weight is the dominant element. Wind loads are relatively small, but sometimes they have a significant impact on the behavior of floating structures or fixed structures constructed at relatively deep depths.

The design conditions for these loads are determined deterministically, taking into account the Sea State, which can occur once every 50 to 100 years, and identify the structural characteristics that occur during the reversal of the structure. In order to do so, it is necessary to perform statistical analysis of stochastic approaches with the usual conditions of sea governing.

Thus, in order to manufacture offshore structures, it is important to examine the design conditions of loads in various ways. Therefore, it is very important to conduct experiments with a model and to compare the situation and contents of actual offshore structures.

An example of an LNG carrier (LNG Carrier) adjacent to an FSRU for transporting LNG from a LNG storage and regasification facility (LNG FSRU) is described by using a plurality of fenders and mooring ropes. Will be connected. Specifically, the fender prevents the collision between the FSRU and the LNGC and prevents the FSRU and the LNGC from being separated or excessively spaced by the mooring rope.

At this time, in order to absorb the impact force during the collision of the FSRU and LNGC and to maintain a certain distance from each other, the fender and the mooring rope should be selected and installed to withstand such impact force and tension, respectively.

In addition, if the fender or mooring ropes cannot withstand the forces given, accidents such as ship breakage or breakage or sinking in the event of a collision between the FSRU and LNGC may occur. It is desirable to be installed to withstand it.

However, if the fender and mooring ropes are installed to withstand even greater force than necessary, problems such as cost and resource waste will occur. Therefore, in order to prevent such a problem, it is preferable to predict in advance how much force will be applied through simulation before installation of the fender and mooring rope, and select and install the fender and mooring rope having appropriate strength accordingly.

In addition to the FSRUs and LNGCs, actual ships, even small ships, are substantially large and large objects, and thus, it is very difficult to directly simulate them.

Therefore, in order to solve the problems of the prior art as described above, it is desirable to accurately predict how much force will be applied through simulation using a model test before the installation of the fender and the mooring rope, but such requirements are still Model test apparatus or method that satisfies all is not provided.

In addition to the demand for a model test apparatus as described above, there is also a need for a damping apparatus in which a damping coefficient can be adjusted as a damping apparatus that can be applied to model testing.

Republic of Korea Patent No. 10-1045045 (June 22, 2011 registered, the name of the invention: model experiment apparatus of floating marine structures)

An object of the present invention is to provide a damping device capable of adjusting the damping coefficient that can be applied to model tests of offshore structures.

In addition, the problem to be solved by the present invention is not limited to the problem (s) mentioned above, and other object (s) not mentioned will be clearly understood by those skilled in the art from the following description. .

As the above-described present invention as a solution to the problem to be solved,

In accordance with a preferred embodiment of the present invention, a damping device capable of adjusting the damping coefficient may include a cylindrical cylinder blocked at both ends; A disk disposed inside the cylinder and slidingly contacting the inner circumferential surface of the cylinder while the center thereof is along the rotational center axis of the cylinder to reciprocate one side and the other side of the cylinder; At least one discharge unit disposed at each of one side and the other side of the cylinder to discharge the fluid inside the cylinder to the outside of the cylinder; At least one suction unit provided on one side and the other side of the cylinder to suck the fluid outside the cylinder into the cylinder; And a controller capable of selectively controlling the amount of fluid discharged through the discharge unit or the amount of fluid sucked through the suction unit, in the interior or exterior of the cylinder. It includes an embodiment characterized in that it comprises a.

In addition, as another embodiment, the discharge unit is installed in correspondence with at least one through-hole and through-hole formed in each of the one side and the other side of the cylinder, the fluid inside the cylinder is opened when the internal pressure of the cylinder is greater than the external pressure It may further include an embodiment characterized in that it has a through-valve operated to be discharged to the outside through the cylinder.

Further, as another embodiment, the suction unit is provided in correspondence with the recovery hole and the recovery hole formed at least one or more in each of the one end surface and the other end surface of the cylinder, and open when the external pressure of the cylinder is greater than the internal pressure By suctioning the fluid through the restoration hole, it may further include an embodiment characterized in that it comprises a restoration ball valve for restoring the pressure in the cylinder.

Further, as another embodiment, a through-hole sensor for measuring the opening or closing of the through-hole valve, and transmits the measurement data to the controller in the vicinity of the through-hole valve, to control the opening or closing of the through-hole valve in accordance with the control of the controller It may further include an embodiment characterized in that it can.

Further, as another embodiment, the restoring ball valve further comprises a restoring ball sensor for measuring the opening or closing of the restoring ball valve, and transmitting the measurement data to the controller, opening and closing the restoring ball valve under the control of the controller. It may further include an embodiment characterized in that the opening degree can be controlled.

Further, in another embodiment, at a position spaced apart from each of the through holes in the inner wall of the cylinder set in the direction of the cylinder, the disk is interposed, and protrudes along the inner circumferential surface of the cylinder on one side and the other side of the cylinder to move the disk range It may further include an embodiment characterized in that the stopper is further provided to limit.

In addition, as another embodiment, it may further include an embodiment characterized in that at least one through-hole is further formed to extend from one surface of the disk to the surface opposite to one surface.

In addition, as another embodiment, it may further include an embodiment characterized in that it further comprises a bypass pipe branched from the cylinder at one end of the cylinder and connected to the other end of the cylinder.

In addition, as another embodiment, the embodiment is characterized in that it is provided near the inlet of the bypass pipe, and further provided with a flow control valve which is opened or closed in conjunction with the pressure change in the cylinder according to the movement of the disk is adjusted. It may further include.

In addition, as another embodiment, in the middle of the bypass pipe, it may further include an embodiment characterized in that the propeller is further provided to rotate in conjunction with the pressure change in the cylinder according to the movement of the disk.

In addition, as another embodiment, the rotation speed of the propeller is further provided to the vicinity of the propeller to measure the rotational speed of the propeller, and transmits the measurement data to the controller, the rotational speed of the propeller can be controlled under the control of the controller An embodiment may be further included.

In addition, as another embodiment, a flow sensor which is added in the vicinity of the flow regulating valve to measure the opening or closing of the flow regulating valve, and transmits the measurement data to the controller, the opening and closing of the flow regulating valve or under the control of the controller It may further include an embodiment characterized in that the opening degree can be controlled.

Specific details of other embodiments are included in the "details for carrying out the invention" and the accompanying "drawings".

Advantages and / or features of the present invention and methods for achieving them will become apparent with reference to the various embodiments described below in detail in conjunction with the accompanying drawings.

However, the present invention is not limited to the configuration of each embodiment disclosed below, but may be implemented in a variety of different forms, each embodiment disclosed herein is to make the disclosure of the present invention complete, It should be understood that the present invention is provided to fully inform those skilled in the art to which the invention pertains, and the present invention is defined only by the scope of each claim of the claims.

According to the damping device which can adjust the damping coefficient according to the preferred embodiment of the present invention having the above configuration, it is possible to provide a damping device capable of adjusting the damping coefficient that can be applied to the model test of the offshore structure.

In addition, according to the damping device that can adjust the damping coefficient according to an embodiment of the present invention, it is possible to provide a damping device that can actively change the damping coefficient according to the speed of the model line or the current flow.

FIG. 1 is an exemplary view briefly illustrating a case in which a damping device capable of adjusting a damping coefficient according to an exemplary embodiment of the present invention is added to a model line to perform a test.
2 is a cross-sectional view briefly showing a damping device capable of adjusting the damping coefficient according to an embodiment of the present invention.
3 is a cross-sectional view showing the configuration of the damping device of Embodiment 1, which can adjust the damping coefficient according to the preferred embodiment of the present invention.
Figure 4 is a cross-sectional view showing the configuration of the damping device of Embodiment 2, the damping device can be adjusted according to an embodiment of the present invention.
FIG. 5 is a cross-sectional view for illustrating a structure of a damping device of Embodiment 3, in which a damping coefficient is adjustable according to a preferred embodiment of the present invention.
FIG. 6 is an exemplary view briefly showing a case in which a damping device capable of adjusting a damping coefficient according to a preferred embodiment of the present invention is added to a model line to which a mooring line is connected to perform a test.
FIG. 7 is an exemplary view briefly illustrating a case in which a damping device capable of adjusting the damping coefficient is added to a model line in multiple directions to perform a test according to an exemplary embodiment of the present invention.

Hereinafter, various exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

Before describing the present invention in detail, the terms or words used in the present specification should not be construed as being limited to ordinary or dictionary meanings, and in order for the inventor of the present invention to explain his invention in the best way. Concepts of various terms may be properly defined and used, and furthermore, it is to be understood that these terms or words should be interpreted as meanings and concepts corresponding to the technical spirit of the present invention.

In other words, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting the teachings of the invention. It should be understood that the term is defined in consideration.

In addition, in the present specification, the singular expressions may include the plural expressions unless the context clearly indicates otherwise, and similarly, the plural expressions may include the singular meanings. do.

Throughout this specification, when a component is described as "comprising" another component, the component may further include any other component rather than excluding any other component unless otherwise stated. It can mean that you can.

Furthermore, if a component is described as being "inside, or in connection with," another component, the component may be directly connected or installed in contact with another component, The components may be spaced apart from each other, and in the case of spaced apart from each other, there may be a third component or means for fixing or connecting the components to other components. It should be understood that the description of the components or means of 3 may be omitted.

On the other hand, if a component is described as being "directly connected" or "directly connected" to another component, it should be understood that no third component or means exists.

Similarly, other expressions describing the relationship between each component, such as "between" and "immediately between", or "neighboring to" and "directly neighboring to", have the same purpose. Should be interpreted as

In addition, in this specification, terms such as “one side”, “other side”, “one side”, “other side”, “first”, “second”, and the like, if used, refer to this one component for one component. Is used to clearly distinguish from other components, and it should be understood that such terms do not limit the meaning of the components.

In addition, terms related to positions such as “up”, “down”, “left”, “right”, etc., when used herein, should be understood to indicate relative positions in the corresponding drawings with respect to the corresponding components, if used. Unless an absolute position is specified with respect to these positions, these position related terms should not be understood as referring to an absolute position.

Moreover, in the specification of the present invention, the terms "… unit", "… unit", "module", "device" and the like, if used, means a unit capable of processing one or more functions or operations, which is hardware Or software, or a combination of hardware and software.

In addition, in the present specification, in designating the reference numerals for each component of each drawing, the same reference numerals refer to the same components so as to have the same reference numerals even though they are shown in different drawings, that is, the same reference numerals throughout the specification. The symbols indicate the same components.

In the accompanying drawings, the size, position, coupling relationship, etc. of each component constituting the present invention may be partially exaggerated or reduced or omitted in order to sufficiently convey the spirit of the present invention or for convenience of description. It may be described, so the proportion or scale may not be exact.

In addition, in the following, in the following description of the present invention, detailed descriptions of configurations known to unnecessarily obscure the subject matter of the present invention, for example, known technologies including the prior art, may be omitted.

FIG. 1 is an exemplary view briefly illustrating a case in which a damping device capable of adjusting a damping coefficient according to an exemplary embodiment of the present invention is added to a model line to perform a test.

Referring to FIG. 1, a model ship 500 is disposed at the center of the drawing, and a damping device 100 and a spring 110 are added to the left and right sides of the model ship 500, respectively. In order to perform the test related to the model line 500, when the damping device capable of adjusting the attenuation coefficient according to the preferred embodiment of the present invention is added to or connected to the model line 500, the damping can be adjusted. One end of the device is connected to the model line 500, it can be seen that the other end of the damping device that can adjust the damping coefficient spring 110 is connected to perform the test.

The basic connection structure when the damping device 100 is connected to the model line 500 may be expressed as 'model line 500-wire-damping device 100-wire-spring 110'. It should be noted here that, depending on the test purpose and environment, the spring 110 may be excluded and the test may be performed.

In addition, FIG. 1 illustrates a case where the model ship 500, the damping device 100, and the spring 110 are installed in order to perform a test, as viewed from above, and the model ship 500 is a marine vessel. It is noted that the model is shown assuming a model of offshore platform or offshore structure used for oil and gas drilling and production. The same is true of the model line 500 shown in FIGS. 6 and 7. Accordingly, depending on the purpose or environment of the test, the shape of the model line 500 may be different from that shown, and is different from the shape of the model line 500 shown in FIGS. 1, 6, and 7. It should be noted that testing with model ships is also possible.

In addition, the damping device 100 shown in Figures 1, 6 and 7 in the test of the model line 500 to which the damping device that can adjust the damping coefficient according to the preferred embodiment of the present invention is applied. ), The damping device (Example 1) (Fig. 3) capable of adjusting the damping coefficient or the damping device (Example 2) (Fig. 4) capable of adjusting the damping coefficient according to the purpose or condition and environment of the test. ) Or a damping device (Example 3) (FIG. 5) capable of adjusting the damping coefficient may be selectively applied.

2 is a cross-sectional view briefly showing a damping device capable of adjusting the damping coefficient according to an embodiment of the present invention.

Referring to FIG. 2, the damping device 100 has a cylinder structure, and is disposed inside the cylinder 102 to reciprocate between one end and the other end of the cylinder 102 within the cylinder 102. A shaft or wire is shown that includes a disk 105 and extends from one side and the other side of the disk 105 to the outside of the cylinder 102. In addition, it should be noted that the arrow shown on the right side of the disk 105 is a conceptual concept to indicate that the disk 105 may be moved in a left or right direction and is not implemented in an actual shape. Arrows for expressing the mobility of the disk as described above are also shown in FIGS. 3, 4 and 5.

In order to perform the model line 500 related test, when the damping device 100 is added to the model ship 500, the model ship 500 is connected to one end of the damping device 100, and the damping device ( The other end of the spring 100 is connected to the spring (110). Depending on the test purpose, conditions and environment, the test may be performed without the spring 110 connected to one end of the damping device 100.

3 is a cross-sectional view showing the configuration of the damping device of Embodiment 1, which can adjust the damping coefficient according to the preferred embodiment of the present invention.

Referring to FIG. 3, there is shown a disk 205 disposed inside the cylinder 202 and capable of reciprocating between one end and the other end of the cylinder 202. In addition, it should be noted that at least one through hole 207 is formed in the disk 205 included in the first embodiment. The through hole 207 extends from one surface of the disk 205 to a surface opposite to the surface of the disk 205. The fluid present in the cylinder 202 is moved inside the cylinder 202 as the disk 205 moves. Is formed to provide a function of the passage that can be moved from one side to the other side or from the other side to one side. In addition, when the number or diameter of the through holes 207 is adjusted, the damping coefficient through the damping device (Example 1) 200, which can adjust the damping coefficient, is also adjusted.

Figure 4 is a cross-sectional view showing the configuration of the damping device of Embodiment 2, the damping device can be adjusted according to an embodiment of the present invention.

Referring to FIG. 4, a damping device (Example 2) capable of adjusting the damping coefficient includes a cylinder 302, a disk 305, and a bypass pipe 320.

The characteristic of the second embodiment of FIG. 4 is that the disk (because of the addition of a bypass tube connected from one end of the cylinder 302 to the other end of the cylinder 302 and in communication with the inside of the cylinder 302) As the 305 moves, the fluid inside the cylinder 302 also flows in the bypass pipe 320.

According to the characteristics of the second embodiment as described above, the configuration that can open and close the bypass pipe line 320 or adjust the opening degree, added to the entrance and exit of the bypass pipe line 320 or the middle of the bypass pipe line 320 As a result, it is possible to obtain an effect of controlling the attenuation coefficient of the attenuation apparatus provided with the bypass pipe 320.

As an example of a configuration capable of opening and closing the bypass pipe 320 or adjusting the opening degree, a use of a valve may be used. In Embodiment 2 of FIG. 4, the flow control valve 315 corresponds to this. As described above, by opening or closing the flow control valve 315 or adjusting the opening degree of the flow control valve 315, the flow rate that can flow through the bypass pipe line 320 is adjusted, and as a result, the bypass pipe path ( The damping coefficient of the damping device provided with 320 is adjusted.

In addition, as another example of a configuration capable of adjusting the flow rate of the bypass pipe line 320, a component such as a propeller may be applied to the middle of the bypass pipe line 320. In the second embodiment of FIG. This corresponds to 310. The propeller 310 may be passively rotated by the fluid flowing in the bypass pipe 320 or may be actively rotated by the control of the controller. When the propeller 310 is actively rotated under the control of the controller, it is possible to obtain an effect of adjusting the attenuation coefficient of the damping device provided with the bypass pipe 320 and the propeller 310. Here, the controller may be provided inside or outside the cylinder 302, and may allow the controller to control the opening and closing or opening degree of the flow regulating valve 315. When controlling the rotational speed of the propeller 310 or the opening degree of the flow control valve 315 or controlling both the rotational speed and the opening degree through the controller, the rotational speed of the propeller 310 is measured and the measured data is measured. A rotation sensor for transmitting to the controller is added near the propeller 310 to measure the opening or closing of the flow control valve 315, and a flow sensor for transmitting the measurement data to the controller is located near the flow control valve 315. Should be added to

Further, in the second embodiment shown in FIG. 4, the function of the disk 305 disposed inside the cylinder 302 can be seen to include the function of the disk 105, 205 shown in FIGS. 2 and 3, Although FIG. 4 shows that the through hole 307 is formed in the disk 305, the through hole 307 is not necessarily formed in the disk 305 in the second embodiment. According to the implementation purpose, conditions or environment, by applying the disk 305 is not formed through the through hole 307, to implement a damping device (Example 2) 300 that can adjust the damping coefficient, or through hole 307 ) Is formed in the disk 305 is formed, such as a valve that can open and close the through hole 307, so that the through hole 307 can be opened or closed depending on the situation, adjustment of the damping coefficient This possible damping device (embodiment 2) 300 may be implemented.

FIG. 5 is a cross-sectional view for illustrating a structure of a damping device of Embodiment 3, in which a damping coefficient is adjustable according to a preferred embodiment of the present invention.

As shown in FIG. 5, the damping device capable of adjusting the damping coefficient is characterized in that the fluid around the cylinder 402 is sucked into the cylinder 402 through the suction unit 440 and the discharge unit 420. Or configured to be discharged to the outside of the cylinder 402, so that the attenuation coefficient of the damping device can be adjusted using suction and discharge action.

Referring to FIG. 5, a damping device (Example 3) capable of adjusting the damping coefficient includes a cylinder 402, a disk 405, a stopper 430, a discharge unit 420, and a suction unit 440. It is composed. Hereinafter, detailed descriptions of each of the listed components will be added.

In the cylinder 402 of the third embodiment, at least one through hole 423 through which the fluid inside the cylinder 402 is discharged and one or more restoration holes 443 through which the fluid outside the cylinder 402 is sucked are formed. The operation of the through hole 423 and the restoring hole 443 will be described below in the description of the discharge unit 420 and the suction unit 440, respectively.

The disk 405 is moved between one end and the other end of the inside of the cylinder 402 like the disk included in other embodiments. However, in the present embodiment, the stopper 430 is provided to limit the moving range of the disk 402, which will be described in detail when the stopper 430 is described.

The discharge unit 420 is composed of a through hole 423 and a through valve 425, at least one through hole 423 is formed on each side and one side of the cylinder, the through valve 425 is a through hole 423 Correspondingly installed and opened when the internal pressure of the cylinder 402 is greater than the external pressure, the fluid inside the cylinder 402 is operated to be discharged to the outside of the cylinder 402 through the through hole 423.

In addition, the through-valve 425, the through-opening or opening degree of the through-valve 425 is further measured, and through-hole sensor for transmitting the measurement data to the controller further comprises a control of the controller of the through-valve 425 It can be configured to control the opening and closing or opening degree.

The suction unit 440 includes a recovery hole 443 and a recovery ball valve 445, and at least one recovery hole 443 is formed at each of one end surface and the other end surface of the cylinder 402, and the recovery ball valve 445 is installed in correspondence with the restoration hole 443, and is opened when the external pressure of the cylinder 402 is greater than the internal pressure, thereby sucking the fluid outside the cylinder 402 through the restoration hole 443. In addition, the cylinder 402 serves to restore the pressure inside.

In addition, near the restoration ball valve 445, the restoration ball valve further measures the opening or closing of the restoration ball valve 445, and transmits the measurement data to the controller, and the restoration ball valve under the control of the controller. It may be configured to control the opening or closing of the 445.

The stopper 430 has a cylinder located between one side and the other side of the cylinder 402 at a position spaced apart from each of the inner walls of the cylinder 402 by a distance set in the cylinder 402 inward direction. Protrudingly formed along the inner circumferential surface of 402 limits the moving range of the disk 405. As such, the stopper 430 is formed such that the disk 405 is moved to the edge of either side of the cylinder 402 to block either the through hole 423 or the restoring hole 443. , It is possible to prevent both the through hole 423 and the recovery hole 443.

In addition, in the damping device (Example 3) 400 that can adjust the damping coefficient shown in Figure 5, the discharge of the fluid and the cylinder inside the cylinder 402 in accordance with the operation of the through-hole valve 425 and the restoration ball valve 445 In order for the flow direction of the fluid to be more easily understood in the inhalation action of the external fluid, the through valve 425 is shown on the outside of the cylinder 402, and the return valve 445 is on the inside of the cylinder 402. Although illustrated in the above, the illustrated form is merely an intentional exaggeration to more easily understand the flow direction of the fluid. Therefore, in the implementation and implementation of the damping device (Example 3) 400 capable of adjusting the damping coefficient, it is not necessary to implement the shape as shown in Figure 5, the through-hole valve 425 and the recovery ball valve 445 As long as the flow direction of the fluid according to the operation of the) is implemented or implemented to be the same as described herein, it will be noted that it can be seen as an embodiment in accordance with the spirit of the present invention.

3, 4, and 5, three embodiments of the damping device capable of adjusting the damping coefficient according to the preferred embodiment of the present invention have been described. However, according to the technical spirit of the present invention, the implementation of the damping device capable of adjusting the attenuation coefficient is not limited to only three types shown in the first, second and third embodiments. If implemented or implemented as in accordance with the technical spirit of the present invention, it should be noted that even if it is a form other than those described or shown in this specification will be seen as one of the embodiments of the present invention.

FIG. 6 is an exemplary view briefly showing a case in which a damping device capable of adjusting a damping coefficient according to an exemplary embodiment of the present invention is added to a model line to which a mooring line is connected to perform a test.

Referring to FIG. 6, damping devices 100 are respectively connected to the left and right strings of the model line 500, and a mooring line 510 is connected to each of four corners of the model line 500, and an arrow P ) Represents the traveling direction of the model line 500, and the arrow V represents the direction of action of the vortex induced motion.

The setting shown in FIG. 6 is for testing the influence of the vortex induced motion on the model line 500 and the mooring line 510 connected thereto, and the setting may vary according to the experiment purpose and the environment. . The change of the setting may include adjusting the number of damping devices 100 or adjusting the damping coefficient, adjusting whether additional springs are connected to the other end of the damping device 100, adjusting the type of the mooring line 510 or adjusting the number. Can be.

FIG. 7 is an exemplary view briefly illustrating a case in which a damping device capable of adjusting the damping coefficient is added to a model line in multiple directions to perform a test according to an exemplary embodiment of the present invention.

The setting of FIG. 7 is for the internal resistance test, and referring to FIG. 7, the damping devices 100 are connected to eight directions of the model line 500 about the model line 500. In the setting of FIG. 7, the damping device 100 is arranged in eight directions or at intervals of 45 degrees. However, according to a change in the purpose or environment of the test, the test may be performed in another setting. The change of the setting refers to adjusting the number of damping devices 100 and the like to the test purpose or environment as described in the description of FIG. 6.

As mentioned above, although various preferred embodiments of the present invention have been described with reference to some examples, the descriptions of the various embodiments described in the "Details of the Invention" section are merely illustrative, and the present invention has been described. Those skilled in the art will understand from the above description that the present invention can be variously modified or implemented in accordance with the present invention.

In addition, the present invention is not limited by the above description because it may be implemented in a variety of other forms, the above description is intended to complete the disclosure of the present invention, in the technical field to which the present invention belongs It is to be understood that the invention is provided only to fully convey the scope of the invention to those skilled in the art, and the invention is defined only by the claims of the claims.

100: damping device
102, 202, 302, 402: cylinder
105, 205, 305, 405: disc
110: spring
200: damping device capable of adjusting the damping coefficient (Example 1)
207, 307: through hole
300: damping device capable of adjusting the damping coefficient (Example 2)
310: propeller
315: flow control valve
320: bypass pipeline
400: damping device capable of adjusting the damping coefficient (Example 3)
420: discharge unit 440: suction unit
423: through hole 443: restorer
425: through-hole valve 445: restoration ball valve
430: Stopper
500: model ship
510: Mooring Line

Claims (12)

Cylindrical cylinders closed at both ends;
A disk disposed inside the cylinder and slidingly contacting the inner circumferential surface of the cylinder while the center thereof is along a rotational center axis of the cylinder to reciprocate one side and the other side of the cylinder;
At least one discharge unit disposed at each of one side and the other side of the cylinder to discharge the fluid inside the cylinder to the outside of the cylinder;
At least one suction unit provided on one side and the other side of the cylinder to suck the fluid outside the cylinder into the cylinder; And
And a controller capable of selectively controlling the amount of fluid discharged through the discharge unit or the amount of fluid sucked through the suction unit, as the case may be, inside or outside the cylinder.
At least one through hole formed to extend from one surface of the disk to a surface opposite to the one surface; And
And a bypass pipe branched from the cylinder at one end of the cylinder and connected to the other end of the cylinder.
In the middle of the bypass pipe,
Characterized in that the propeller is further provided to rotate in conjunction with the pressure change in the cylinder according to the movement of the disk,
Damping device with adjustable damping coefficient.
The method of claim 1,
The discharge unit,
At least one through-hole formed in each of the one side and the other side of the cylinder and
The through-hole valve is provided in correspondence with the through-hole, and is opened when the internal pressure of the cylinder is greater than the external pressure is operated so that the fluid inside the cylinder is discharged to the outside of the cylinder through the through
Characterized in that the,
Damping device with adjustable damping coefficient.
The method of claim 1,
The suction unit,
At least one restoration hole formed in each of one end surface and the other end surface of the cylinder and
A restoring valve installed in correspondence with the restoring hole and opened when the outer pressure of the cylinder is greater than the inner pressure, thereby restoring the pressure inside the cylinder by sucking the fluid outside the cylinder through the restoring hole;
Characterized in that the,
Damping device with adjustable damping coefficient.
The method of claim 2,
Near the through-hole valve,
Measure the opening or closing of the through valve,
Further provided with a through-hole sensor for transmitting the measurement data to the controller,
According to the control of the controller, it is possible to control the opening or closing of the through-valve valve,
Damping device with adjustable damping coefficient.
The method of claim 3, wherein
Near the restoration ball valve,
Measure the opening or closing of the restoration ball valve,
It is further provided with a restoration ball sensor for transmitting the measurement data to the controller,
It is possible to control the opening or closing of the restoration ball valve according to the control of the controller,
Damping device with adjustable damping coefficient.
The method according to claim 2 or 4,
At a position spaced apart from each of the through holes in the inner wall of the cylinder set in the cylinder inward direction,
Characterized in that the stopper is further provided on one side and the other side of the cylinder with the disk interposed therebetween to limit the moving range of the disk,
Damping device with adjustable damping coefficient.
delete delete The method of claim 1,
It is installed near the entrance of the bypass pipe,
Characterized in that the flow rate control valve is further provided to open or close in conjunction with the pressure change in the cylinder in accordance with the movement of the disk,
Damping device with adjustable damping coefficient.
delete The method of claim 1,
And a rotation sensor which is added near the propeller to measure the rotational speed of the propeller and transmit measurement data to the controller.
Characterized in that the rotational speed of the propeller can be controlled according to the control of the controller,
Damping device with adjustable damping coefficient.
The method according to claim 9 or 11,
It is further provided with a flow rate sensor for measuring the opening or closing of the flow rate control valve is added to the flow rate control valve, and transmits the measurement data to the controller,
Characterized in that the opening and closing or opening degree of the flow control valve can be controlled according to the control of the controller,
Damping device with adjustable damping coefficient.

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