RU2597711C2 - Kochetov ring-type equifrequent resilient element - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to machine building. Equifrequent resilient element comprises two elastic coaxially located rings: external and internal. Rings are rigidly interconnected by means of six flat resilient elements with the recesses being provided between them. Four resilient elements are set pairwise symmetrically to the horizontal axis of the inner and outer rings and are of trapezoid shape. Two resilient elements are radially set along the vertical axis and are of rectangular shape. Width of the rectangle of these elements is equal to the width of the upper base of the trapeziums of the four resilient elements. Three intermediate vibration damping layers and additional ring from a friction material are attached to the lower part of the external elastic ring.

EFFECT: improved efficiency in resonant mode of vibration isolation.

1 cl, 2 dwg

Description

The invention relates to mechanical engineering, instrumentation and can be used for vibration isolation of technological equipment, machine tools, devices.

It is known the use of plate-shaped elastic elements for vibration isolation of technological equipment in the textile industry [1, 2, 3]. The calculations show the high efficiency of the plate-type elastic elements with their relatively small dimensions, while tests in real factory conditions confirm their effectiveness with high reliability and ease of maintenance.

However, the load capacity on the dish-type element is low.

It is known to use plate-type vibration isolators [4, 5] with a pendulum suspension, in which a package of elastic disk elements is used, consisting of series-connected blocks of disk-shaped elastic elements, with each block of disk-shaped elastic elements made in the form of two coaxially located disk springs, upper and lower connected by inner and outer diameter using coaxially arranged T-shaped rings.

The disadvantage of this type of vibration isolators with a pendulum suspension is their large height dimension, since they belong to the category of suspended vibration isolation systems, where the overall dimensions are not limited in height, and relatively small dimensions in height are required for supporting vibration protection systems.

Known vibration isolator with ring disk springs [6], containing a housing in the form of a base with a cover, and elastic elements in the form of at least two disk ring springs, each of which consists of upper and lower elastic rings connected by elastic plates, and fixed in the housing through elastic bushings made of elastomer, installed between the base, the lower rings of the springs and the cover.

Known plate vibration isolator [7], comprising a housing comprising a base with a lid and a packet of disk-shaped elastic elements placed therein, which consists of series-connected disk-shaped elastic elements, the inner surface of which interacts with a coaxially located sleeve, one end of which is rigidly fixed to the base and the other interacts with the inner surface of the lid, made in the form of an inverted glass, the end part of which interacts with a plate elastic elements, p When in use, between the end of the sleeve and the bottom cover there is a gap.

The disadvantage of this type of vibration isolators is the “snapping” of the elastic elements in the opposite direction, i.e. passing at a certain load through zero rigidity, which somewhat reduces the effectiveness of vibration protection.

It is known to use plate-type vibration isolators [8, 9], consisting of series-connected blocks of disk-shaped elastic elements, while the block of disk-shaped elastic elements is made in the form of two coaxially located disk springs, upper and lower, connected by an inner and outer diameter using coaxially arranged rings T-shaped profile.

The disadvantage of this type of vibration isolators is the possibility of blocking plate-shaped elastic elements in packages of T-shaped rings, which can somewhat change their overall stiffness, and therefore the effectiveness of vibration protection.

The closest technical solution to the claimed object is an elastic plate-shaped element according to the patent of the Russian Federation No. 2285836 F16F 1/32, 10/20/2006 [10] (prototype), containing a plate-shaped elastic surface in the form of a truncated cone, on the surface of which is made, in a plane parallel to the bases of the truncated cone, two through grooves with the formation of two truncated conical surfaces connected by two or three ribs directed along the lines forming the conical surface.

A disadvantage of the known device is the relatively low efficiency at resonance due to the absence of vibration damping.

The technical result is an increase in the efficiency of vibration isolation in a resonant mode.

This is achieved by the fact that in an equal-frequency elastic element of a ring type containing two elastic coaxially arranged rings: an external and an internal, which are rigidly interconnected by means of flat elastic elements, elastic, coaxially arranged rings, an external and internal are interconnected by means of six flat elastic elements with the formation of recesses between them, and four elastic elements are arranged in pairs symmetrically relative to the horizontal axis of the outer and inner rings and have a trapezoid the shape of the shape, and two elastic elements are radially arranged along the vertical axis, and have a rectangular shape, and the width of the rectangle of these elements is equal to the width of the upper base of the trapezoid of four elastic elements.

In FIG. 1 shows a frontal section of an equal-frequency elastic element of the ring type, FIG. 2 is a plan view of FIG. one.

The ring-frequency elastic element contains two elastic coaxially arranged rings: external 1 (lower, larger diameter) and internal 2 (upper, smaller diameter), which are rigidly interconnected by means of six flat elastic elements 3, 4, 5, 6, 7, 8 with the formation of recesses 10, 11, 12, 13, 14, 15 between them. The inner ring 2 has a central hole 9 for attaching a vibration-insulated object (not shown in the drawing), and the outer 1 is mounted on a base (not shown in the drawing), which must be protected from vibration and shock. Moreover, the four elastic elements 3, 4, 5, 6 are arranged in pairs symmetrically with respect to the horizontal axis (Fig. 2 is a top view) of the outer 1 and inner 2 rings and have a trapezoidal shape, and two elastic elements 7, 8 are radially arranged along the vertical axis and have a rectangular shape, and the width of the rectangle of these elements is equal to the width of the upper base of the trapezoid four elastic elements 3, 4, 5, 6.

Three intermediate vibration-damping layers are attached to the lower part of the outer elastic ring 1 (not shown in the drawing): the first layer is made of dispersed elastic-damping material, in which crumbs can be used, for example, of the following materials: rubber, cork, foam, capron , foamed polymer, as well as crumbs of solid vibration-damping materials, for example, such as plastic compounds of the type Agate, Anti-Vibrate, Shvim with a size of fractions of crumbs of 1.5 ÷ 2.5 mm, the second layer is made of knitted elastic synthetic fibers, and the cell size, elm GOVERNMENTAL of the elastic filament by 10 ÷ 15% smaller size fractions crumb vibration-damping material; and the third layer is made of a continuous damping material, in which sponge rubber, needle-punched material of the type “Vibrosil” based on silica or alumino-borosilicate fiber, as well as non-woven vibration-damping material can be used.

It is possible that an additional ring 16 made of friction material is attached to the lower surface of the outer ring 1 and is located in the lower part of the cup 17 with a lateral gap equal to the horizontal displacement of the outer ring 1 at maximum vibration load.

The equal-frequency elastic element of the ring type operates as follows.

With vibrations of a vibration-insulated object installed through the hole 9 on the inner ring 2, spatial vibration protection and shock protection are provided. In addition, the vibration protection system is equally frequency-controlled, since during loading, first, sediment of rectangular elastic elements 7, 8 occurs, and then elastic elements 3, 4, 5, 6 of trapezoidal shape come into operation.

Information sources

1. Kochetov OS, Sazhin B.C. Noise and vibration reduction in production: theory, calculation, technical solutions. M: MSTU named after A.N. Kosygina, 2001 .-- 319 p.: P. 197, fig. 5.65.

2. Kochetov OS Calculation method of plate vibration isolators for looms // Izv. universities. Technology of the textile industry. - 2000, No. 4. S. 98 ... 104.

3. Kochetov OS Calculation of the spatial vibration protection system. The journal "Occupational Safety in Industry", No. 8, 2009, pp. 32-37.

4. Kochetov O.S., Kochetova M.O., Khodakova T.D., Shesterninov A.V. Dish vibration absorber with pendulum suspension // Patent for invention No. 2279580. Published on July 10th, 2006. Bulletin of inventions No. 19.

5. Kochetov O.S., Kochetova M.O., Khodakova T.D. Dish vibrator with pendulum suspension // Patent for invention No. 2287727. Published on November 20, 2006. Bulletin of inventions No. 32.

6. Kochetov O.S., Kochetova M.O., Khodakova T.D. Vibration isolator Kochetov with ring cup springs // Patent for invention No. 2285834. Published on October 20, 2006. Bulletin of inventions No. 29.

7. Kochetov O.S., Kochetova M.O., Khodakova TD, Kochetov S.S., Kochetov Sergey Sergeevich. Domed vibration isolator Kochetov // Invention patent No. 2285835. Published on October 20, 2006. Bulletin of inventions No. 29.

8. Kochetov O.S., Kochetova M.O., Khodakova TD, Stareev M.E., Kochetov S.S., Kochetov Sergey Sergeevich. Vibration isolator Kochetova plate type // Patent for invention No. 2293228. Published 02/10/07. Bulletin of inventions No. 4.

9. Kochetov O.S., Kochetova M.O., Khodakova T.D., Shesterninov A.V., Stareev M.E. Plate type vibration isolator // Patent for invention No. 2285838. Published on October 20, 2006. Bulletin of inventions No. 29.

10. Kochetov O.S., Kochetova M.O., Khodakova T.D. The elastic element of the plate type // Patent for the invention No. 2285836. Published on October 20, 2006. Bulletin of inventions No. 29.

Claims (1)

An equal-frequency elastic ring-type element containing two elastic coaxially arranged rings: an external and an internal one, which are rigidly connected to each other by means of flat elastic elements, elastic coaxially arranged rings, an external and internal one, interconnected by six flat elastic elements with the formation of recesses between them, moreover, four elastic elements are arranged pairwise symmetrically with respect to the horizontal axis of the outer and inner rings and have a trapezoidal shape, and two elastic the elements are radially arranged along the vertical axis and have a rectangular shape, the width of the rectangle of these elements being equal to the width of the upper base of the trapezoid of four elastic elements, three intermediate vibration-damping layers attached to the bottom of the outer elastic ring: the first layer is made of dispersed elastic-damping material, in which it can be used crumbs, for example, of the following materials: rubber, cork, polystyrene, capron, foamed polymer, as well as crumbs of solid vibration damping materials, for example er, such as plastic compound such as "Agate", "Anti-Vibrate", "Shvim" with a size of fractions of crumbs of 1.5 ÷ 2.5 mm, the second layer is made of knitted elastic synthetic threads, and the size of the cells knitted from elastic synthetic threads 10 ÷ 15% less size fractions of crumbs of vibration damping materials; and the third layer is made of a continuous damping material in which sponge rubber, needle-punched material of the type “Vibrosil” based on silica or alumino-borosilicate fiber, as well as a non-woven vibration-damping material, characterized in that an additional friction ring is attached to the lower surface of the outer ring, can be used material placed in the lower part of the glass with a lateral gap equal to the horizontal displacement of the outer ring at maximum vibration load.

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