RU2354868C1 - Kochetov rubber metal vibration isolator - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: invention refers to mechanical engineering and can be implemented for vibration isolation of technological equipment. Rubber metal vibration isolator consists of a case and of an elastic element made out of elasromer interacting with an object. The case is made in form of a base, a cover with a collar and spherical groove; a pin with a spherical belt on the end interacts with the said groove; the spherical belt is of upgraded hardness. The elastic element is made out of elastomer in form of a package of elastic elements arranged along the trajectory of axes-symmetrical concentric circumferences in an intermediate element with a central opening and a slot for fixation of elastic elements. The shape of cross section of elastic elements can be both polygonal, for example rectangular, square and trapezoid, and as described by quadric curves, for example in form of their circumference, ellipse, hyperbola, and parabola, and also in form of their combinations. Rigidity ratio of elastic elements increases from the center to periphery which facilitates equifrequency of vibration isolating system.

EFFECT: increased efficiency of vibration isolation.

1 dwg

Description

The invention relates to mechanical engineering and can be used for vibration isolation of technological equipment, including instruments and equipment.

The closest technical solution to the claimed object is a vibration isolator according to the copyright certificate of the USSR No. 1594326, F16F 15/06, containing an elastic element, a housing.

A disadvantage of the known device is the lack of effectiveness.

The technical result is an increase in the effectiveness of vibration isolation.

This is achieved by the fact that in the vibration isolator containing the housing and the elastic element, the housing is made in the form of a base, a lid with a shoulder and a spherical recess, with which the stud interacts with a spherical girdle at the end having increased hardness, and the elastic element is made of an elastomer in the form of a package elastic elements located along the path of axisymmetric concentric circles in an intermediate element having a central hole and slots for fixing elastic elements, the cross-sectional shape of which can be as many one, for example, rectangular, square, trapezoidal, and described by second-order curves, for example, in the form of a circle, ellipse, hyperbola, parabola, and in the form of their combination, the ratio of the stiffness of the elastic elements increasing from the center to the periphery, which makes the vibration isolation system of equal frequency , i.e. C ₇ > C ₉ > C ₁₁ .

The drawing shows a frontal section of a vibration isolator.

The vibration isolator comprises a housing made in the form of a base 3, a cover 2 with a shoulder and a spherical recess 12, with which the pin 14 interacts with a spherical girdle 1 at the end having increased hardness (for example, as a result of quenching by high-frequency currents). The stud 14 enters the hole of the paws of the machine 15 and is mounted in it by means of nuts 13 and 16.

The elastic element is made of elastomer in the form of a package of elastic elements 7, 9, 11 located along the path of axisymmetric concentric circles in the intermediate element 4 having a central hole 5 and slots 6, 8, 10 for fixing the elastic elements 7, 9, 11. Sectional shape elastic elements can be either polygonal, for example rectangular, square, trapezoidal, or described by second-order curves, for example, in the form of a circle, ellipse, hyperbola, parabola, or in the form of a combination thereof. The ratio of the stiffnesses of the elastic elements 7, 9, 11 increases from the center to the periphery, which makes the vibration isolation system of equal frequency, i.e. C ₇ > C ₉ > C ₁₁ .

Vibration isolator works as follows.

With vibrations of the vibration-isolating object 15 mounted on the stud 14, the elastic element of the elastomer, consisting of elastic elements 7, 9, 11, perceives vertical loads, thereby weakening the dynamic effect on the floors of buildings, or the side of an aircraft, or a mobile vehicle. Horizontal vibrations are damped due to the unrestricted location of the elastic element, which gives it a certain degree of freedom of vibrations in the horizontal plane.

Claims (1)

A rubber-metal vibration isolator comprising a housing and an elastic element of elastomer interacting with an object, characterized in that the housing is made in the form of a base, a lid with a shoulder and a spherical recess, with which a stud interacts with a spherical girdle at the end having increased hardness, and the elastic element is made from an elastomer in the form of a package of elastic elements located along the trajectory of axisymmetric concentric circles in an intermediate element having a central hole and slots for fixing elastic their elements, the cross-sectional shape of which can be either polygonal, for example rectangular, square, trapezoidal, or described by second-order curves, for example, in the form of a circle, ellipse, hyperbola, parabola, or in the form of their combination, and the ratio of the stiffness of the elastic elements increases from center to the periphery, which makes the vibration isolation system of equal frequency.