SU376615A1 - DEVICE FOR AMORTIZATION OF SEISMIC - Google Patents

Description

one

The invention relates to damping systems and can be used to create systems for seismic protection of various objects from the effects of seismic loads of earthquakes or nuclear explosions.

Devices are known for damping seismic shocks acting on objects, such as a building, containing shock absorbers placed between the object and the base and associated with the object by means of hinges with a free stroke. Dampers are used mechanical spring, hydraulic, pneumatic, pneumatichydraulic, rubber-cord, rubber, etc.

In the course of long-term operation of seismic shock absorption systems, shock absorbers are subject to constant static weight loads, creating significant stress and causing a number of harmful processes, such as relaxation, adhesion, diffusion, corrosion of mechanical spring dampers, aging of rubber and rubber-cord, loss of tightness of sealing devices pneumatic and pneumatichydraulic, resulting in a gradual failure of the shock absorber, resulting in hydrochloric incapacitating or change its power characteristics beyond donuskaemyh values and drawdown object

on shock absorbers relative to the initial position.

Detection of defective shock absorbers is associated with considerable difficulties, the need for a permanently operating monitoring equipment.

The purpose of the present invention is to increase the service life and maintainability of the device.

This is achieved by the fact that the proposed device is equipped with a mechanism for unloading shock absorbers, designed in the form of jacks and connected to each other: between themselves intermediate elements with curvilinear contact surfaces installed between the jacks and the object.

FIG. Figures 1 and 2 depict the a-device of the proposed device.

The device contains stops rigidly connected to the object to be deprecated 2, intermediate elements 3 with curvilinear contact surfaces, hydraulic jacks 4 with rods 5 and safety sleeves 6 and shock absorbers 7, connected to the damping object 2 by hinges 8, which are free-running. Intermediate elements 3 can be made in the form of pins, interconnected by wires 9, or in the form of balls located in the separator 10. Intermediate elements 3 are installed between the stops / and the ends of the rods 5. In the piston cavities of the cylinders of the hydraulic jack 4 through the pipeline / The working fluid is supplied, and the depreciable object 2 is raised by the amount of static deformation of the shock absorbers. 7 under the influence of weight 0 | b. 2. In this case, the shock absorbers 7 are completely unloaded. Similarly, depending on the requirements and specific conditions, any percentage of the unloading of shock absorbers 7 is obtained, which is determined by the size of the lifting object 2 na hydraulic jack. 4. Connecting the cylinders of hydraulic jacks between pipeline & 3 to contact surfaces To unload the hydraulic system, there are bushings 6, which are screwed onto the threaded ends of the rods 5 until they stop against the ends of the cylinders of the hydraulic jacks 4, after which the working fluid is drained. In this position, the weight loads of the depreciable object 2, the shock absorbers 7 by mine; the base 12 is transmitted through the stops 1, the intermediate elements 3, the rods 5, the bushings 6 and the cylinders of the hydraulic jacks 4, which are rigidly connected to the base. Under seismic action, the base 12 receives horizontal, vertical, and angular oscillations, as a result of which relative motion takes place on the intermediate elements 3. As a result of rolling and tilting, the intermediate elements 3 fall out and the depreciable object 2 is lowered onto the shock absorbers 7. To reduce the rolling time intermediate elements their spherical surfaces are made with a variable radius, decreasing from the center of the sphere to its edges, S this case the condition of rolling out intermediate elements 5 uchshaets, since their peroxide atyvan.ii arises ascending; as tilting the tilting moment is eliminated and the formation of holes in the contact element 3 with the abutments and /. by the rods 5. Therefore, the force required for the initial relative motion remains stable and equal to the target. Before falling out of intermediate elements 3 shock absorbers. 7 practically does not resist the movement due to the attachment of amortization from 7 to object 2 on the joints 8, which have a free turn. The connection of intermediate elements in the pipes 9 or their arrangement in the separator 10 ensures simultaneous falling out of all the intermediate elements and simultaneously loaded: all the shock absorbers 7, and also reduces the angular perturbations on the depreciable object 2 at the moment of switching the device, and the inertial force acting intermediate elements from the side of m g 9 or separator 10, contributes to falling out. If at the moment of switching the device the vertical component of the inertial force exceeds the value allowed by the depreciable object, the sleeve 6, weakened by the circular notch 13, is destroyed, which prevents the transfer of dangerous loads and. facilitates the fallout of intermediate elements. Object of the Invention A device for damping seismic shocks, comprising shock absorbers placed between an object and a base and associated with the object by means of bows with a free stroke, characterized in that, in order to increase service life and maintainability, the device is equipped with a mechanism for unloading shock absorbers made in the form jacks, and interconnected intermediate elements with curved contact surfaces installed between the jacks and the object.