JPH058085U - U-shaped vibration control tank device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a U-shaped damping tank device having a simple structure and a large damping force. [Structure] In a vibration damping tank in which liquids 2 are placed above the left and right vertical tanks of a U-shaped tank 1 while leaving air chambers 3a and 3b respectively, the left and right air chambers 3a and 3b are communicated with each other. A U-shaped vibration damping tank device comprising a communication pipe 4 in which a liquid 7 is stored in a U-shaped pipe portion 6 formed in a part thereof.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention relates to a U-shaped vibration damping tank device.

[0002]

[Prior art]

  A U-shaped tongue as shown in FIG. 4 is conventionally used as a device for preventing the shaking of large structures such as ships. It is known that an anti-sway tank filled with liquid.   In this type of anti-sway tank, water 2 is normally stored in the U-shaped tank 1 and the left and right vertical tanks are The air chambers 3a and 3b are left above the link part, and the water 2 is not mixed with the oscillator of the dynamic vibration absorber. Hit

[0003]

[Problems to be solved by the device]

  Here, the air chambers 3a and 3b are connected by a ventilation pipe 4, and a valve 5 is inserted into the ventilation pipe. When the water tank 2 is loaded and the anti-sway tank is installed on the ship to reduce the shaking, the water 2 moves in the direction of the arrow. The air in the air chambers 3a and 3b correspondingly moves back and forth in the direction of the ventilation pipe 4 and the valve. It moves back and forth through 5.   Therefore, the opening of the valve 5 is adjusted to give resistance to the movement of air, and the water 2 is reciprocated. It adjusts the dynamic damping, and the function of such an anti-swing tank is well-known as a dynamic vibration absorber. As is known, in order to effectively realize the function as a dynamic vibration absorber, Optimal adjustment of the damping adjustment is extremely important. However, Since adjusting the valve opening alone has its own limits, the damping effect is more effective in the shipping industry. Clause is required.   The present invention has been proposed in view of such circumstances, and has a simple structure and is extremely effective. An object of the present invention is to provide a typical U-shaped vibration damping tank device.

[0004]

[Means for Solving the Problems]

  To this end, the present invention has an empty space above the vertical tanks on the left and right of the U-shaped tank. In a damping tank that is filled with liquid leaving an air chamber, connect the left and right air chambers above. And a communication pipe in which a liquid is stored in a U-shaped pipe portion formed in a part of the pipe. It is characterized by what you got.

[0005]

[Action]

  According to this structure, the ventilation in response to the reciprocating motion of the liquid in the U-shaped tank When the air inside the pipe moves back and forth, it is contained in the U-shaped pipe part formed in a part of the ventilation pipe. The contained liquid (water, oil, high-viscosity liquid) is pushed by air and reciprocates in the U-shaped pipe section. To do.   Since the liquid conduit resistance is greater than the air conduit resistance at that time, a U-shaped pipe The liquid stored in the road has a greater damping resistance than the conventional air-only ventilation pipe. Can be given. A small diameter pipe is adopted for the U-shaped pipe line, and a throttle mechanism is added. By adjusting the flow resistance of the liquid with this, a greater damping effect can be obtained, which is necessary for the anti-sway tank. A necessary and sufficient damping rate can be given.

[0006]

【Example】

  An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal section showing the first embodiment. 3 is a plan view, FIG. 2 is a diagram showing the relationship between the aperture ratio and the damping ratio of the diaphragm member in FIG. 2 is a vertical sectional view showing a second embodiment of the present invention.   First, in FIG. 1, the liquid 2 is stored in the U-shaped tank 1 and is placed on the left and right vertical tanks. Air chambers 3a and 3b are formed in the respective parts, and both air chambers are connected by a ventilation pipe 4. Communication A portion of the trachea 4 is formed with a downwardly curved U-shaped conduit portion 6 for containing a liquid 7. Na A diaphragm member 8 may be added to the U-shaped portion 6 if necessary.   Normally, water is used as the liquid 2 contained in the U-shaped tank 1, and the U-shaped pipe of the ventilation pipe is used. As the liquid 7 stored in the passage 6, water, oil, or other high-viscosity liquid is used. , The U-shaped conduit 6 is added as necessary to the throttle member 8 such as a valve or an orifice. Is used.   In such a structure, the liquid 2 reciprocates in the arrow direction as a vibrator of the dynamic vibration reducer. When moving, when the liquid 7 reciprocates by being pushed by the air in the ventilation pipe, the flow resistance is reduced. To work. This flow resistance is used in the anti-swing tank as a dynamic vibration absorber using liquid 2 as a vibrator. Damping can be applied to obtain the required damping rate.   Furthermore, if the flow resistance is adjusted by using a throttle member, it will be optimized according to the state of the structure to be damped. An appropriate attenuation rate can be obtained. As mentioned above, the present proposal is a simple mechanism for effective damping. Realize the tank.   The U-shaped conduit portion 6 of the ventilation pipe 4 generates a flow resistance in the stored liquid 7. Therefore, in addition to small-diameter pipes, ducts equipped with friction plates in the flow direction also provide liquid friction resistance. A damping force is obtained by the resistance.   Further, a throttle member 8 such as a valve or an orifice which is added as needed is used to throttle the liquid. Damping force is added by the resistance. In addition to the above, an aperture was provided as the diaphragm member. A diaphragm may be used, and the damping is adjusted depending on the opening ratio of the diaphragm. Opening Fig. 2 shows an example of experimental results of damping and aperture ratio when using a diaphragm with .   The broken line in the figure indicates that a diaphragm with an opening is installed in a conventional vent pipe that does not contain liquid. The solid line indicates that the diaphragm with an opening is installed in the liquid in the vent pipe of the present invention. That is the case. As shown in the figure, a large attenuation is added by changing the aperture ratio. You can see that you can reduce.   FIG. 3 is a vertical sectional view showing a second embodiment of the present invention. In this example, the ventilation pipe 4 is U-shaped. By providing along the outer shape of the mold tank, the U-shaped pipe line is formed by itself. In addition, Illustration of the water supply / drainage (air) pipe is omitted.

[0007]

[Effect of device]

  In short, according to the present invention, the upper and lower vertical tanks of the U-shaped tank are respectively In the damping tank that is filled with liquid leaving the air chamber, the left and right air chambers are connected. In addition, a communication pipe that stores liquid in the U-shaped pipe part formed in a part of Is it possible to obtain a U-shaped vibration damping tank device that has a simple structure and is very effective? The present invention is extremely useful industrially.   In addition, the U-shaped conduit is provided with a throttle member to provide a vibration damping effect with a simple structure. Can be further increased.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a relationship between an aperture ratio and a damping ratio of a diaphragm member in FIG.

FIG. 3 is a vertical sectional view showing a second embodiment of the present invention.

FIG. 4 is a vertical sectional view showing a known U-shaped vibration damping tank.

[0008]

[Explanation of symbols]

1 U-shaped tank 2 liquid (usually water) 3a, 3b air chamber 4 ventilation pipe 5 valves 6 U-shaped conduit of ventilation pipe 7 liquids (water, oil, high viscosity liquids, etc.) 8 diaphragm member 9,10 Water supply and drainage pipe 11a, 11b Supply and exhaust pipe

Claims (2)

[Scope of utility model registration request] 1. A vibration damping tank comprising a U-shaped tank and a vertical tank on the left and right of which an air chamber is left above and a liquid is filled in the vibration tank, the left and right air chambers being communicated with each other and formed in a part thereof. A U-shaped vibration damping tank device comprising a communication pipe configured to store liquid in a U-shaped pipe line portion. 2. The vibration damping tank device according to claim 1, wherein a throttle member is attached to the U-shaped conduit portion.