RU2490526C1 - Vibration isolator of process equipment - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: vibration isolator includes a housing with a cover plate, inside which an elastic element and a threaded pin are mounted. External thread is made on the housing and interacts with internal thread made on the cover plate. The elastic element is installed on an annular support mounted on a threaded end face of the housing. An external collar of the central sleeve interacts with an annular stop of the cover plate. An internal annular stop is made in the central sleeve and interacts from time to time with the annular stop made on the threaded pin. A washer interacting with the annular support on the threaded end face of the housing is fixed on the opposite end of the threaded pin.

EFFECT: reduction of amplitude of oscillations.

3 dwg

Description

The invention relates to mechanical engineering and can be used for vibration isolation of technological equipment where high demands are placed on vibration, shock and effective protection of equipment from external vibrations and shocks, including for instruments and equipment.

Known rubber vibration isolator of technological equipment (patent RU 2305808, IPC F16F 1/36, publ. 09/10/2007) containing a housing made in the form of a base having a bottom plate with a central hole, a cylindrical or tapered side wall with holes and rigidly connected to the wall disk ring. The cover of the vibration isolator is made of an upper cylindrical part and two conical parts connected with it, while the cover in the upper part is connected to a central sleeve having a cylindrical hole and a threaded one. In the lower part of the sleeve has a flange with a conical surface. The elastic element consists of at least two disk rings of elastomer.

A disadvantage of the known rubber vibration isolator of technological equipment is that the design of the known vibration isolator increases the height of the amplitude of oscillation of the technological equipment and thereby reduces its life.

Also known is a rubber vibration isolator of technological equipment (patent RU 2305806, IPC F16F 1/36, publ. 09/10/2007), comprising a housing and an elastic element of elastomer, the housing being made in the form of a base to which a cover is attached. An elastic element made of elastomer is located between the inner surface of the cover and the outer surface of the sleeve with a central hole and a shoulder. The conical belt of the elastic element covers the outer surface of the sleeve. In the lower part, the elastic element has a recess in a conical shape.

A disadvantage of the known rubber vibration isolator of technological equipment is that the elastic element works both in compression and in tension, i.e. the alternating amplitude of the movement of the technological equipment when moving down is quenched by an increase in the deformation of the elastic element, and when moving up, by a decrease in the deformation of the elastic element relative to the rest strain experienced by the elastic element in static, plus the tensile strain of the elastic element, which increases the height of the oscillation amplitude of the equipment and reduces its life .

The technical result of the proposed technical solution is to create a design of vibration isolators of technological equipment, providing a decrease in the height of the amplitude of oscillations of the technological equipment and increase the life of the technological equipment.

The technical result is achieved by the fact that an external thread is made on the housing, interacting with the internal thread made on the cover, while the elastic element is mounted on an annular support mounted on the threaded end of the housing, and the central sleeve interacts with the annular stop of the cover with the outer shoulder, and in the central the sleeve is made of an internal annular stop, which periodically interacts with the annular stop made on the threaded rod, and on the opposite end of the threaded rod is fixed and cooperating with the annular support.

The essence of the proposed technical solution is illustrated by the following drawings:

figure 1 - vibration isolator of technological equipment in a loaded state, static;

figure 2 - vibration isolator of technological equipment in the process of moving the equipment down, the lower point of the amplitude of the movement of the equipment;

figure 3 - vibration isolator of technological equipment in the process of moving up, the highest point of the amplitude of the movement of the equipment.

The vibration isolator of the technological equipment (Fig. 1) contains a housing 1 with a cover 2, inside of which an elastic element 3 and a threaded rod 4 are mounted. An external thread 5 is made on the housing 1 and interacts with an internal thread 6 made on the cover 2. The elastic element 3 is mounted on an annular support 7 mounted on the threaded end 8 of the housing 1. The central sleeve 9 by the outer collar 10 interacts with the annular stop 11 of the cover 2. In the central sleeve 9 there is an internal annular stop 12, which interacts with the annular stop 13, in performed on the threaded rod 4. At the opposite end of the threaded rod 4, a washer 14 is mounted that interacts with the ring support 7. The ring support 7 and the central sleeve 9 are made of high-strength polymer, for example polyamide.

The proposed vibration isolator of technological equipment operates as follows.

Technological equipment 15 is installed on the central sleeve 9 through the damper 16. The elastic element 3 is compressed under the weight of the technological equipment, it is additionally tightened with a nut 17 through a threaded rod 4, which serve to fasten the technological equipment 15. The cover 2 is tightened by an external thread 6 along the external thread 5 housing 1 to touch the annular stop 11 with the outer collar 10. Threaded connections are fixed with a sealant. In the described manner, the vibration isolator of the process equipment takes a static position.

When the technological equipment moves both down and up, deformation gaps “a” and “b” are formed.

When the technological equipment moves 15 downward (FIG. 2), the central sleeve 9, by means of the outer shoulder 10, compresses the elastic element 3, which takes a barrel-shaped shape and is pressed against the cop 3, this provides a non-linear characteristic of the operation of the elastic element of the vibration isolator. Compression of the elastic element 3 leads to the formation of a gap "a" between the outer flange 10 of the Central sleeve 9 and the annular stop 11 of the cover 2.

When the technological equipment 15 moves upward (FIG. 3), the washer 14 and the ring support 7 compress the elastic element 3, which takes a barrel-shaped shape and also presses against the wall of the cover 2. Compression of the elastic element 3 leads to the formation of a gap “b” between the ring support 7 and threaded end 8 of the housing 1.

As a result, the elastic element 3 works only in compression when the technological equipment moves both down and up. Since the elastic modulus of the rubber used in the elastic elements is much higher in compression during tensile elastic modulus, the height of the amplitude of the oscillations of the process equipment is reduced and thereby the service life of the process equipment is increased.

Claims (1)

Vibration isolator of technological equipment, comprising a housing with a cover, inside of which an elastic element and a threaded rod are mounted, characterized in that the external thread is made on the housing and interacts with the internal thread made on the cover, while the elastic element is mounted on an annular support mounted on the threaded end housing, and the Central sleeve outer collar interacts with the ring stop of the cover, and in the Central sleeve is made of an internal ring stop, periodically interacting with an annular stop made on the threaded rod, and on the opposite end of the threaded rod, a washer is mounted that interacts with the annular support on the threaded end of the housing.

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