SU1296761A1 - Dynamic damper of vibrations of tank filled with liquid - Google Patents

Abstract

The invention relates to damping vibrations of various containers filled with a liquid. The purpose of the invention is to improve the reliability and efficiency of damping, which is achieved by the fact that in the bottom wall 4 of the bellows 3 of the vibration damper, pressurization channels 10 and discharge II are provided with a shut-off valve 7 installed in the discharge channel II, and also provided that the damper is equipped with a rod 8 , connected ush, the upper wall 5 of the bellows 3 and the hydraulic damper 6. Forcibly depressurizing the bellows 3 by opening the shut-off valve 7 provides an accurate setting of the damper for a given frequency, and the value of the attached mass is possible liquids more than in known devices. 1 il. 9 6 (L with to with O5 05 / f

Description

The invention relates to damping vibrations of various containers filled with a liquid.

The aim of the invention is to improve the reliability and efficiency of damping, achieved by maintaining the characteristics of the damper during operation of the object.

The drawing shows a structural diagram of the dynamic damper oscillations capacitance filled with liquid.

The vibration damper contains a container 2 filled with a gas 1 filled with gas bellows 3 with the bottom 4 and top 5 walls and a hydraulic damper 6, the locking element 7, the rod 8 and the strength elements 2 are transferred to the liquid. The energy of oscillations is spent on the buildup of the system, the added mass of the fluid — the sylphon tuned to the frequency of the forcing oscillations. When vibrating the upper wall

 5 performs plane-parallel displacements. Simultaneously with the mixing of the upper wall 5, the plate 8 of the hydraulic damper is rigidly fastened to it by the rod 8. Due to the flow of liquid through the perforations of the casing 13, the oscillation energy is dissipated in the liquid. Thus, the interaction of the bellows 3 associated with the hydraulic damper leads to a decrease in the pressure pulsations in the liquid and the amplitudes of the wall oscillations.

Laziness 9. In the lower 4 wall of the bellows 3, the capacity 5 is 2. Capacities 10 and discharge 11 are filled. 11. The magnitude of the added mass is liquid.

The porous element 7 is installed in the discharge channel 11, the rod 8 passes through the locking element 7, one end of the rod 8 is fastened with the top 5 wall, and the other with a plate

12-hydraulic damper 6, casing

13 which is perforated.

The channel of the boost 10 is connected to the line 14 of the boost containing the valve 15.

20

In the system, the attachable mass of fluid — bellows is limited only by the dimensions of tank 2. When the static pressure in tank 2 increases, the fluid is pressed into the bellows 3 by differential pressure through the discharge channel 11, and with a subsequent decrease in static pressure in tank 2, it is squeezed out of the bellows 3. the result is pressure in the bellows

The dynamic oscillation damper, work- 25, remains approximately equal to the pressure on

melts as follows.

Before starting its operation, pressurized gas is supplied to the bellows cavity 3 through the pressurization channel 10 (valve 15 opens) and the bellows starts to stretch. When the upper wall 5 is moved by the movement of the rod 8, the locking element is opened

7 and pressurized gas through discharge port 11 from bellows 3 enters tank 2, displacing possibly accumulated liquid during storage from bellows 3. Next, either pressurized tank 2 takes place (if this is provided for by the tank operating conditions) or the excess pressure is released from the tank through units refueling and drainage.

8, the bellows 3 is set to a pressure corresponding to the pressure in the tank 2 at the level of the bottom wall 4, and is characterized by the hydrostatic pressure of the liquid column corresponding to the height of the bellows. 3, from the pressure at the level of the upper wall 5 of the bellows. Under the action of this differential pressure (which is further

level of the bottom wall 4. Therefore, when the static pressure in the tank 2 changes, the top wall 5 of the bellows remains almost in its nominal position.

Thus, the presence of channels for supercharging and resetting with forced depressurization of bellows 3 retains the accuracy of tuning to a given frequency specified at the initial moment, and the value of the attached mass of liquid is possible more than in a known device. This determines

35 higher reliability and efficiency of the proposed absorber.

Claims (4)

Invention Formula Q A dynamic oscillation damper of a container filled with liquid, containing a bellows placed in a liquid filled with gas, and a hydraulic damper associated with it, characterized in that, in order to improve reliability and efficiently, the damper 45 is absorbed in the lower wall practically without any changes in the wall 5 of the lower bellows, pressurization channels are made and wary its nominal position. A single reset, and the damper is equipped with a locking valve 12 occupies the nominal cop installed in the relief channel and the position in the housing 13. Thereafter, the charge passing through the locking element of the silicone pipe 3 stops (closed with a roller, one end of which fastened with a top 15). In the process of operation, the oscillations, the external wall of the bellows, and the other, from the hydraulics in the structure, through the walls are a thermal damper. Compose A. Andreev Editor A. GulkoTehred I. VeresKorrektor. L. Pi.pipenko Order 592/38 Circulation 812 Subscription VNIIPI USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35 ,. Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 bones 2 are transferred to fluids. The energy of oscillations is spent on the buildup of the system, the added mass of the fluid — the sylphon tuned to the frequency of the forcing oscillations. When vibrating the upper wall 5 performs plane-parallel displacements. Simultaneously with the mixing of the upper wall 5, the plate 8 of the hydraulic damper is rigidly fastened to it by the rod 8. Due to the flow of fluid through the perforations of the casing 13, the vibrational energy is dissipated in the fluid. Thus, the interaction of the bellows 3 associated with the hydraulic damper leads to a decrease in the pressure pulsations in the liquid and the amplitudes of the wall oscillations. containers 2. The amount of added mass is liquid. In the system, the attachment mass of the fluid — the bellows is limited only by the dimensions of the container 2. When the static pressure in the container 2 increases, the liquid is pressed into the bellows 3 by the differential pressure through the discharge channel 11, and with a subsequent decrease in the static pressure in the container 2, it is squeezed out of the bellows 3. As a result of this pressure in the bellows remains approximately equal to the pressure on remains approximately equal to the pressure on level of the bottom wall 4. Therefore, when the static pressure in the vessel 2 changes, the top wall 5 of the bellows remains almost in its nominal position. Thus, the presence of channels of pressurization and discharge during forced depressurization of the bellows 3 retains the accuracy of tuning to a given frequency specified at the initial moment, and the value of the attached fluid mass is possible more than in a known device. This determines higher reliability and efficiency of the proposed quencher. Invention Formula