RU2582638C1 - Kochetov package of annular conical springs - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: package of ring springs contains external and internal ring resilient cone discs. Discs are located between the base and cover. Base in made as sleeve, one of the internal discs rests against it. Cover is made in form of T-shaped disc with through hole to accommodate centering mandrel. Mandrel is fixed on the base via the resilient gasket by screw. External and internal discs are made as truncated cone surfaces, and contain three radial slots. Slots are directed from larger cone base to lesser one. Each of the radial slot is ended by hole. On each of disks two spherical segments are made. On base on cup bottom perimeter and on cover under shelf there is ring from vibration dampening material.

EFFECT: efficient damping in resonance mode.

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 and other objects.

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 pendulum suspension is their large overall height.

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 is fixed in 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 placed in it a package of disk-shaped elastic elements, which consists of series-connected disk-shaped elastic elements.

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-type 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 closest technical solution to the claimed object is an annular spring on.with. USSR No. 280111, F16F 1/08, 08/26/1970 [11] (prototype), containing a set of ring springs, which is composed of sequentially alternating disks of larger and smaller diameters with bent in opposite directions edges along the radius, which provides the pair of disks of one with another.

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 the package of annular conical springs, consisting of interconnected external and internal annular elastic conical disks, contains at least one external and two internal annular elastic conical disks located between the base, made in the form of a glass, which abuts against one of the internal disks, and a cover made in the form of a T-shaped disk with a through hole in which a centering mandrel is mounted, fixed to the base through an elastic gasket with a screw, while the external and internal morning annular elastic conical disks are made in the form of truncated conical surfaces and contain at least three radial grooves directed from the larger base of the truncated cone to the smaller base, and each of the radial grooves ends with an opening.

In FIG. 1 shows a frontal section of an annular conical spring, FIG. 2 is a general view of one of the spring disks in a free state.

The package of annular conical springs (Fig. 1) consists of a set comprising at least one external 1 and two internal 2 and 3 annular elastic conical disks (Fig. 2), placed between the base 4, made in the form of a glass, in which one rests from internal disks 3, and a cover 5, made in the form of a T-shaped disk with a through hole 6, in which a centering mandrel 7 is mounted, fixed to the base through an elastic gasket 8 with a screw 14. External 1 and internal 2 and 3 ring elastic conical disks are made truncated cones x surfaces and contain at least three radial grooves 10 directed from the larger base 11 of the truncated cone to the smaller base 12. Each of the radial grooves 10 ends with an opening 13 for stress relieving.

The pairing of the lateral conical surfaces of the outer 1 annular elastic conical disk with the lateral conical surfaces of the inner 2 and 3 annular elastic conical disks is made in the form of spherical segments of radius R, present on each of the disks in the amount of two located respectively at the larger base 11 of the truncated cone and the smaller base 12 of each of the discs. In this case, the spherical segments are made integrally with the conical surfaces of each of the disks and are directed in different directions from the generatrix of the conical surface, i.e. one spherical segment of each disk is directed inside the conical surface, and the other outward. The number of external and internal disks may vary depending on the stiffness and size of the spring travel. To increase the damping in the system on the base 4, along the perimeter of the bottom of the glass, there is a ring 9 made of vibration damping material having an internal profile that is equidistant to the profile of the external spherical segment of the inner ring 3 contacting it, resting on the base 4. On the cover 5 under the T-shaped shelf the disk is located a ring 15 of vibration damping material having an external profile that is equidistant to the profile of the inner spherical segment of the ring 2 in contact with it, abutting against the cover 5.

It is possible that when the material of the ring 9 located on the base 4, along the perimeter of the bottom of the cup having an internal profile that is equidistant to the profile of the outer spherical segment of the inner ring 3 contacting it, resting on the base 4, a friction material made of a composition including the following components in their ratio in wt.%:

mixture of resol and novolac phenol formaldehyde pitches in the ratio 1: (0.2-1.0) 28 ÷ 34 fibrous mineral filler containing glass roving or a mixture of glass roving and basalt fiber in a ratio of 1: (0.1-1.0) 12 ÷ 19 graphite 7 ÷ 18 carbon black friction modifier in the form of a mixture with kaolin and silicon dioxide 7 ÷ 15 barite concentrate 20 ÷ 35 talc 1.5 ÷ 3.0

A package of ring conical springs works as follows.

Under load Ρ, the annular conical disks interact with one another at the same time as both the external and internal working surfaces of their spherical segments. In the process, the energy from the loads perceived by the spring is spent on the elastic deformation of each annular conical disk, for example, by analogy with each coil of a coil spring, as well as energy dissipation due to friction when moving their spherical segments, for example, by analogy with how damping is carried out Dry friction. In addition, in the proposed design, the voltage at the edges of the rings of the spring is significantly reduced compared to Belleville springs, which allows to increase the permissible stresses in the material and, therefore, the load, as well as slightly increase the stroke. The movement of the annular conical disks provides the difference between the loading and unloading characteristics of the spring in one stroke under load, which, in turn, provides, for example, some increased attenuation of the mechanical vibrations of the system as a whole. The spring is made so that the manufacture of its annular conical disks can be made of different materials and various blanks, for example, from sheet steel and non-ferrous cast alloys, as well as from the corresponding non-metallic materials, including plastics and similar materials.

Sources of Bibliography

1. Kochetov O.S., Sazhin B.S. Noise and vibration reduction in production: theory, calculation, technical solutions. M .: MSTU im. 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 // 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. Vibration isolator plate with a 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. / Patent for invention 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. Elastic element of a disk type. / Patent for invention No. 2285836. Published on October 20, 2006. Bulletin of inventions No. 29.

11. Taradainikov P.S. Taradainikov spring. / USSR copyright certificate for invention No. 280111, class. F16F 1/08. Published on August 26th, 1970. Bulletin of inventions No. 27.

Claims (1)

The package of annular conical springs, consisting of interconnected external and internal annular elastic conical disks, contains at least one external and two internal annular elastic conical disks located between the base, made in the form of a glass, which abuts one of the inner disks, and a cover made in the form of a T-shaped disk with a through hole in which a centering mandrel is mounted, fixed to the base through an elastic gasket with a screw, while the external and internal annular elastic to the nose discs are made in the form of truncated conical surfaces and contain at least three radial grooves directed from the larger base of the truncated cone to the smaller base, and each of the radial grooves ends with an aperture, pairing the side conical surfaces of the outer annular elastic conical disc with the side conical surfaces of the inner annular elastic conical disks made in the form of spherical segments of radius R, available on each of the disks in an amount of two, located respectively at a larger base of the truncated cone and a smaller base of each of the disks, while the spherical segments are made integrally with the conical surfaces of each of the disks and directed in different directions from the generatrix of the conical surface, while on the base around the bottom of the glass there is a ring of vibration-damping material having an internal profile equidistant to the profile of the outer spherical segment of the inner ring in contact with it, resting on the base, and on the cover under the shelf of the T-shaped disk put a ring of vibration-damping material having an external profile that is equidistant to the profile of the inner spherical segment of the ring in contact with it, abutting the lid, characterized in that as the material of the ring located on the base around the perimeter of the bottom of the glass having an internal profile that is equidistant to the profile in contact with it the outer spherical segment of the inner ring resting on the base, a friction material is used made from a composition comprising the following components s at their ratio in wt.%:
mixture of resol and novolac phenol formaldehyde pitches in the ratio 1: (0.2-1.0) 28 ÷ 34 fibrous mineral filler containing glass roving or a mixture of glass roving and basalt fiber in a ratio of 1: (0.1-1.0) 12 ÷ 19 graphite 7 ÷ 18 carbon black friction modifier in the form of a mixture with kaolin and silicon dioxide 7 ÷ 15 barite concentrate 20 ÷ 35 talc 1.5 ÷ 3.0

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