RU2581229C1 - Kochetov belleville spring pack - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to machine building. Spring package includes two pairs of disc springs. Each pair contains opposite installed and free connected large bases of cone disks. Number of disk pairs depends on spring forcer and stroke. Belleville springs are located in cylindrical casing. Bottom part of casing is rigidly connected with base. Base has centering cylindrical shoulder. Lower base of cone disk of one pair freely enters shoulder. In top part of casing freely with clearance lid with centering cylindrical shoulder is installed. On shoulder the lesser base of next pair of belleville springs is centered. On cylindrical surface of casing groove can be made to reduce its radial rigidity. Conical disks enter housing with a gap. Small bases of cone disks of adjacent pairs are connected with each other by damping element made in form of three-step disk. Set of belleville springs is made with alternating use of cone disks in each pair of disk springs with their polyurethane and without it. Central part of damping element is made of friction material.

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 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 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 package of plate-shaped elastic elements housed therein.

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 dated 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 the 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 dated 08/26/1970 [11] (prototype), containing a set of ring springs, which is made up of successively alternating disks of larger and smaller diameters with edges bent to opposite sides along a radius that ensures the disks of one to others.

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 the spring package, consisting of interconnected external and internal annular elastic conical disks, there is a set of Belleville springs, which includes at least two pairs of Belleville springs, and each pair consists of opposed and movable interconnected by large bases of conical disks, and the number of pairs of disks in the set of such springs may be different depending on the stiffness and magnitude of the stroke of the spring, and the set of Belleville springs is located in a cylindrical housing, the lower part of which is rigidly connected to a base having a centering cylindrical flange, into which the smaller base of the conical disks of one of the pairs is movably mounted, and a cover with a centering cylindrical collar, on which the smaller base of the other pair of a set of Belleville springs, while a groove can be made on the cylindrical surface of the housing to reduce its radial stiffness, with large bases opposite e and the interconnected conical disks of each pair enter the housing with a gap, based on its inner cylindrical surface, and the smaller bases of the conical disks of the adjacent pairs are interconnected by a damping element, which is made in the form of a set of disk springs, a three-stage disk, axisymmetrically mounted the central part of which are smaller bases of adjacent pairs of Belleville springs.

In FIG. 1 shows a front section of a package x of springs; FIG. 2 is a general view of one of the conical disks in a free state.

The cup spring package (FIG. 1) includes at least two sets of 13 spring cups, including at least two pairs of 11 and 12 cup springs, each pair consisting of opposed and movably interconnected large bases 14 conical disks (Fig. 2), for example, a pair of 11 includes disks 7 and 8, and a pair of 12 includes disks 9 and 10. The number of pairs of disks in a set of such springs may vary depending on the stiffness and size of the spring travel.

A set of 13 Belleville springs (Fig. 1), consisting of pairs of 11 and 12 Belleville springs, is located in a cylindrical body 3, the lower part of which is rigidly connected to the base 1, having a centering cylindrical flange 2, which moves the smaller base 15 of the conical disks of one from pairs, for example, the disk 10 of the pair 12. In the upper part of the housing 3, the cover 5 with a centering cylindrical collar 6 is movably, with a gap, on which the smaller base of the other pair, for example, the disk 7 of the pair 11, from the set of 13 disk springs is centered. A groove 4 can be made on the cylindrical surface of the housing 3 to reduce its radial stiffness. The large bases 14 of the opposed conical disks of each pair enter with a gap into the housing 3, based on its inner cylindrical surface, and the smaller bases 15 of the conical disks of adjacent pairs, for example, the disk 8 of the pair 11 and the disk 9 of the pair 12, are interconnected a damping element 16, which is made in the form of an axisymmetrically mounted set 13 of Belleville springs of a three-stage disk, on the central part of which are smaller bases of adjacent pairs of Belleville springs.

It is possible that the central part of the damping element 16, which is made in the form of an axisymmetrically mounted set 13 of Belleville springs of a three-stage disk, on which smaller bases of 15 adjacent pairs of Belleville springs are based, is made of a friction material of the composition, including the following components, when their ratio, in wt . %: a mixture of rezol and novolac phenol-formaldehyde resins in the ratio 1: (0.2-1.0) 28 ÷ 34%, a fibrous mineral filler containing glass roving or a mixture of glass roving and basalt fiber in the ratio 1: (0.1-1.0 ), 12–19%, graphite 7–18%, a friction modifier containing carbon black in the form of a mixture with kaolin and silicon dioxide, 7–15%, barite concentrate 20–35%, talc 1.5–3.0%.

The spring package works as follows.

Under load Ρ, the conical disks 7, 8, 9, 10 in each pair of a plate spring set interact simultaneously with one another, i.e. in pairs, on large bases 14, and in sets on smaller bases 15. Moreover, in addition to their compression, they move along the inner cylindrical surface of the housing 3, which in turn experiences radial elastic loads.

In the process, the energy from the perceived loads is spent on the elastic deformation of each conical disk, for example, by analogy with each coil of a coil spring, as well as on the dissipation of energy due to friction during their movement, for example, by analogy, how damping is carried out with “dry” friction. " The cup spring package is made in such a way that it allows the manufacture of conical disks from various materials and various blanks, for example, from sheet steel and non-ferrous cast alloys, as well as from non-metallic materials, including plastics and similar materials.

Information sources

1. Kochetov OS, Sazhin B.C. Noise and vibration reduction in production: theory, calculation, technical solutions. M .: MSTU im. A.N. Kosygina, 2001.319 s.: 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.

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)

A disk spring package, consisting of interconnected outer and inner annular elastic conical disks, consists of a disk spring set, which includes at least two pairs of disk springs, each pair consisting of opposed and large the bases of the conical disks, and the number of pairs of disks in the set of such springs may be different depending on the stiffness and magnitude of the stroke of the spring, and the set of Belleville springs is located in a cylindrical body, bottom the main part of which is rigidly connected to a base having a centering cylindrical flange, into which the smaller base of the conical disks of one of the pairs is movably inserted, and a cover with a centering cylindrical collar is located movably with a gap in the upper part of the body, on which the smaller base of the other pair from the set of dish-shaped springs, while on the cylindrical surface of the housing a groove can be made to reduce its radial stiffness, moreover, with large bases opposite and located the conical disks of each pair are interconnected with a gap in the housing, based on its inner cylindrical surface, and the smaller bases of the conical disks of the adjacent pairs are interconnected by a damping element, which is made in the form of an axially symmetric set of disk springs of a three-stage disk, in the central part of which are based smaller bases of adjacent pairs of Belleville springs, and conical disks are made with coating them on both sides or on one side with vibration damping material, for example, polyurethane, while the set of Belleville springs is made with alternating use of conical disks in each of the pairs of Belleville springs coated with and without vibration damping material, characterized in that the Central part of the damping element, which is made in the form of an axisymmetrically mounted set of Belleville springs of a three-stage disk, on which is based on the smaller bases of adjacent pairs of Belleville springs, made of friction material composition, including the following components, when their ratio, in wt.%: a mixture of rezol and novolac phenol-formaldehyde resins in the ratio 1: (0.2-1.0) 28 ÷ 34%, a fibrous mineral filler containing glass roving or a mixture of glass roving and basalt fiber in the ratio 1: (0.1-1 , 0), 12–19%, graphite 7–18%, a friction modifier containing carbon black 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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