SU1670289A1 - Vibration-damping support - Google Patents

Abstract

The invention relates to mechanical engineering and can be used to protect the operator and the vibration-sensitive equipment from the vibration of machinery. The purpose of the invention is to increase the efficiency of vibration insulation by adjusting the elastic characteristics in the circumferential direction and increasing the interval of non-linear elastic deformation. Supplying the device with clamping plates 7 and 8 and making the two opposite surfaces of the cover 4 and the housing 1 cylindrical with the centers displaced relative to each other and with forming, perpendicular to the longitudinal axis of the support and parallel between themselves and the nut 9, ensures the specified positive effect due to dispersion energy. 6 Il.

Description

1

The invention relates to mechanical engineering and can be used to protect the operator and the vibration-sensitive equipment from the vibration of machinery.

The aim of the invention is to increase the vibration isolation efficiency by adjusting the elastic characteristics in the circumferential direction and increasing the interval of non-linear elastic deformation.

Figures 1 and 2 depict a vibration isolating support, longitudinal section; Figs. 3 and 4 are the same, with the device pressed in the form of a cylindrical body with a screw-on lid; figure 5 and 6 - the same, with an elastic body.

The anti-vibration support (Fig. 1 and 2) includes a housing 1, a sleeve 2 with a flange 3, a cover 4 and metal-plastic elements 5 and 6 located therein. The support is provided with pressure plates 7 and 8. The pressure plate 7 contacts the surface of the metallographic element 5 and the surface of the cover 4, the pressure plate 8 — with the surface of the metal-plastic element 6 and the surface of the housing 1. At least two of these opposite surfaces are cylindrical, with their centers displaced relative to each other, and their forming perpendicular longitudinal oh axis of the support and parallel to each other. The pressing of the metal-plastic elements 5 and 6 can be carried out, for example, by means of a nut 9 (FIGS. 1 and 2) screwed onto the body

The lid 4, which interacts with the pressure plate 7 closest to it, through the anti-friction element 10, is made in the form of a gasket made of a material with a small coefficient of friction. for example, polystyrene, teflon, etc. (fig.Z and 4) or by means of an elastic body 1 and bolts 11 (figure 5 and 5).

Anti-vibration support works as follows.

When preloading metal-plastic elements 5 and 6 with the help of cover 4 and sleeve

2, they are flexurally deformed in two mutually perpendicular directions. Metal parts 5

and 6 have anisotropy of elastic properties. In the direction normal to the rubber-metal layers, the initial part of the elastic characteristic is non-linear, and the elastic characteristic in the direction of the flat layers is linear. Due to the bending deformation of the layers of metal-plastic elements 5 and 6. The distance between two cylindrical surfaces facing one of these elements decreases from the center to the periphery (Figures 1 and 2) and provides an increase in the deformation interval of the vibration-damping support, which preserves its non-linear properties. . The adjustment of the bending of the metal-plastic elements 5 and 6 is carried out by tightening the nut 9 and is accompanied by a change in the orientation of their rubber-metal layers to loads of various kinds, including the moment around the longitudinal axis. In the case of angular deformation of the vibration isolating support, the rubber layers are subjected not only to shear, but also to compressive loads, which ensures low torsional rigidity with low moment loads and more with significant loads.

Due to the bending deformation of the metal-plastic elements 5 and 6, the elastic characteristic of the vibration isolating support in the circumferential directions to its longitudinal axis becomes nonlinear. At the same time, the magnitude of perceived moment loads increases significantly.

In the vibration isolation support shown in Figs. 3 and 4, only one of the metal-plastic elements 6 is subjected to bending deformation, which makes it possible to expand the range of elastic characteristics along radial directions.

In the support shown in FIGS. 5 and 6, by making the body 1 elastic along the longitudinal axis with the bolt 11 screwed to the last 11, the calculated pressing force Ppod is provided. The height h of the elastic body 1 is selected from the relation

P to P e T d - podzh / Sk.

h3 is the total height of the elements of the vibration isolating support:; day is the thickness of the bottom of the case; FPAJ is a preset force value; Ck - body stiffness of the vibration isolating support along its longitudinal axle.

Adjusting the elastic characteristics in the circumferential direction and increasing the interval of non-linear elastic deformation allows to increase the efficiency of vibration insulation.

Claims (1)

Vibro-isolating support, comprising a housing, a sleeve with a flange, a cover and two metal-plastic elements, characterized in that, in order to increase efficiency by adjusting the elastic characteristics in the circumferential direction and increasing the interval of non-linear elastic deformation, it is equipped with pressure plates, contacting one with the surface of one metal-plastic element and surface of the body, the other with the surface of another metal-plastic element and the surface of the cover, and at least D of two opposite housing surfaces and linings made tsipindricheskimi, y which centers are displaced relative to each other, and the supports forming perpendicular to the longitudinal axis and parallel to each other srig. FIG. 2 ten one -five FIG. four 5 eleven (rig 6