SU1430639A1 - Apparatus for dissipating energy - Google Patents

Abstract

The invention relates to mechanical engineering and can be used to protect foundations of various kinds of objects from the effects of vibration and shock. The aim of the invention is to expand the range of perceived loads and increase the efficiency of dissipating their energy by using a set of damping chambers of different natural frequencies. The change in pressure in the inner cavity 2 of the housing 1 when moving the piston 6 as a result of dynamic action causes the intermediate pistons 9 to oscillate in the lower 4 and lateral 3 chambers of the housing 1. The presence of a set of chambers, each of which has an abnormal natural oscillation frequency, ensures effective damping -g {disturbing oscillations due to the predominant excitation of chambers with the corresponding SL with its own natural frequency. 1 il.

Description

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The invention relates to mechanical engineering and can be used to protect the foundations of various kinds of objects from the effects of vibration and shock.

The purpose of the invention is to expand the range of perceived loads and increase the efficiency of dissipating their energy by using a set of damping chambers of different actual oscillation frequencies.

In the drawing, an energy dissipation device is shown, longitudinal section.

The device for dissipating energy comprises a housing 1 with an internal cavity 2, side chambers 3 and additional lower chambers 4 with controllable elements connected to the jl;: bodies 5, and a piston 6 with a rod 7, the internal cavity 2 and the pushers 5 are filled with working fluid. The side 3 and bottom 4 chambers are made in the form of cylinders located in blocks 8. The pushers 5 are made in the form of slofon, interacting through intermediate pistons 9 with ynpyriiMH elements 10. The trunk of the cephons on the side of the internal cavity 2 is provided with perforated partitions 11. Working fluid the medium in the internal cavity 2 is separated by a corrugated sheath 12 from a piston 6 connected to nsh-i. The piston rod 7 of the piston 6 is hollow, in the upper part with a removable plug 13 and thread for connection with the equipment to be protected 14, and in the lower part with a check valve 15. The elastic elements can be made in the form of a spring. Between the upper cover 16 of the housing and the piston 6 is installed elastic bump 17.

The device works as follows.

Shock and vibrating low-frequency loads from the protected equipment 14 are transmitted to the rod 7 and through it to the piston 6, which, acting on the working medium of the internal cavity 2, causes it to move from the lower 4 to the lateral 3 chambers, pushing by means of pushers 5 intermediate pistons 9, thereby compressing the elastic elements 10, and the impact on the pushers 5 of the side chambers 3 occurs through the perforated partitions 11, causing the latter to lag behind

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maximum load The reverse action of the elastic elements of the 10 lower chambers stabilizes the pressure of the working medium in the internal cavity 2, bringing the load in the side chambers 3 to the maximum height, excluding the possibility of harmonious oscillations of the protected equipment 14.

The corrugated shell 12 is elastic and eliminates the direct contact of the working medium with the walls of the housing 1, improving its tightness.

The rod 7 is collapsed hollow, equipped with a check valve 15 to be able to regulate the initial pressure of the working fluid and is closed by a plug 13 to prevent foreign bodies from entering the shaft cavity. The bump 17 reduces the reciprocal recoil of the piston 6..

Pressure change in the inside. " cavities 2 cause oscillations in the lower 4 and lateral 3 chambers of the intermediate pistons 9. However, in the lower chambers 4 having higher natural vibration frequencies, the initial position is restored before the intermediate pistons 9 in the side chambers 3 reach their extreme positions. As a result, redistribution and quenching on perforated partitions 11, with which only low-frequency side chambers 3 are equipped, and high-frequency oscillations, is achieved. The presence of a set of cameras, each of which has its own natural frequency, ensures effective suppression of disturbing harmonic oscillations due to the predominant excitation of cameras with the corresponding natural frequency. At the same time, the oscillation amplitude of the intermediate pistons 9 in the side chambers 3 is significantly greater than the movement of the piston 6u of the perceived load, and, consequently, the high rate of fluid flow through the perforated partitions 11 provides the most efficient energy dissipation.

Claims (3)

1. A device for dissipating energy, containing; its body, filled with working fluid and having side chambers, elastic elements placed in the latter, pushers, before. 1430639 l Namely for the transmission of force from 2. The device pop. 1, the difference is a workplace: it has a medium on elastic elements, which are designed in order to increase the piston installed in the case from reliability, the case from the side, with the rod opposite to the piston is designed with, for the purpose of expanding the range with additional chambers in which the elastic elements are perceived and increased, the dissipation of their energy is observed, the sacrificial pistons and the pushers are provided with a piston connected with the bellows. corrugated sheath for separation no working environment from 3. The device according to claim 1, of the pistons located between the two, so that the perforation is performed with torx-elastic elements and pushers, and the bellows is made in the form of cones, which are made in the form of bellows. , the cave holes, the base of which is closed on the side of the intermediate 15 o (pressed towards the intermediate pistons and having a piston on the side of the body. perforated end.