RU2597060C2 - Kochetov disk-type resilient element - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to machine building. Disk-shaped resilient element comprises two disk-shaped resilient elements set symmetrically to a separating disk. Each resilient element comprises disk-shaped surface in the form of a truncated cone, the said surface is provided with three through grooves forming two truncated conical surfaces, connected by three fins which are directed along the generating lines of the conical surface. Damping cylinders made from cast polyurethane are fixed in the central part of the separating disk and enter the holes at the truncated conical surfaces' vertices with a gap. Damping cylinders are interconnected by a resilient insert, consisting of an axis and thrust disks. Resilient insert axis passes through the holes in the separating disk and damping cylinders. Reinforced vibration impact protection elements in the form of compression springs are placed in three through grooves perpendicular to the separating disk. Thrust disks are made from rigid vibration damping material. Axis of the resilient insert is combined, consisting of a rigid core with the polyurethane coating.

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 including a base with a lid, and a package 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 There is a gap between the end of the sleeve and the bottom of the cover.

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 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 elastic dish-shaped element containing dish-shaped elastic surfaces in the form of a truncated cone, with through grooves in them, connected by ribs directed along the lines forming the conical surface, two elastic dish-shaped elements are located relative to the dividing disk, opposite and axisymmetric to it, and each of the dish-shaped elements contains a dish-shaped elastic surface in the form of a truncated cone, on which three wells are made in a plane parallel to the bases of the truncated cone grooves with the formation of two truncated conical surfaces connected by three ribs directed along the lines forming the conical surface, and damping cylinders made of injection-molded polyurethane and entering with openings at the vertices of the truncated conical surfaces are fixed coaxially to the elastic elements this damping cylinders are interconnected by an elastic insert consisting of an axis passing through coaxial holes in the separation disk and damping qi lindra, and thrust disks connecting the upper and lower damping cylinders respectively with the separation disk, while the resistant disks of the elastic insert fix the elastic disk elements relative to the separation disk.

In FIG. 1 shows a plate-type elastic element with three ribs; FIG. 2 is a plan view of FIG. one

The elastic element of the disk type contains two elastic disk elements 1 and 2 (Fig. 1), opposite and axisymmetrically located relative to the separation disk 12, and each of the disk elements 1 and 2 contains a disk elastic surface in the form of a truncated cone, on which is made, in the plane parallel to the bases of the truncated cone, three through grooves, respectively 3, 4 and 5 (Fig. 2) with the formation of two truncated conical surfaces 1 and 11, connected by three ribs 6, 7 and 8, respectively, directed along the generatrices the surface of the lines. In the central part of the separating disk 12, coaxial elastic elements 1 and 2 are fixed damping cylinders 13 and 14 made of injection polyurethane and entering with gaps 9 and 10, respectively, into the holes 13 at the tops of the truncated conical surfaces 11 (Fig. 2). The damping cylinders 13 and 14 are interconnected by an elastic insert consisting of an axis 15 passing through the coaxial holes in the separation disk 12 and the cylinders 13 and 14, and thrust disks 16 and 17, connecting the upper and lower damping cylinders 13 and 14, respectively, with the separation disk 12, while the thrust discs 16 and 17 of the elastic insert fix the elastic disk elements 1 and 2 relative to the separation disk 12.

In three through grooves, respectively 3, 4 and 5 (Fig. 1), of the elastic disk elements 1 and 2 perpendicular to the separating disk 12, reinforced vibration-proof elements 18 are located, fixed respectively in three holes made in the peripheral part of the separating disk 12 and made, for example , in the form of compression springs.

A variant is possible (not shown in the drawing) when the thrust disks 16 and 17 of the elastic insert with the axis 15 connecting the upper and lower damping cylinders 13 and 14 with the separating disk 12 are made of hard vibration damping material, for example, agate, anti-vibration plastic compounds ”,“ Shvim ”, and the axis 15 of the elastic insert is combined, consisting of a rigid core with a polyurethane sheath covering it.

The elastic element of the plate type works as follows.

When vibrations of a vibroisolated object (not shown in the drawing) installed through the supporting surfaces of the truncated conical surfaces of the elastic elements 1 and 2, spatial vibration protection and shock protection are provided, while the damping cylinders 13 and 14 made of injection-molded polyurethane provide damping in the system, moreover, the larger the amplitude of the oscillations, the greater the damping will be ensured in the system due to the fact that when the disk-shaped elastic elements 1 and 2 are compressed, the gaps 9 and 10, with which we enter the damping cylinders 13 and 14 into the holes at the vertices of the truncated conical surfaces 1 and 11, and this will lead to additional friction in the system at resonance and, therefore, to increase the efficiency of spatial vibration protection along both the three coordinate axes and the rotation angles relative to these axes.

An elastic insert consisting of an axis 15 passing through coaxial holes in the separation disk 12 and the cylinders 13 and 14, and thrust disks 16 and 17, connects the damping cylinders 13 and 14 together with the separation disk 12, which contributes to the reliable fixation of the elastic disk elements 1 and 2 relative to the separation disk 12.

With an excessive increase in dynamic vibro-shock loads, the elastic disk elements 1 and 2 will compress to their critical compression, after which reinforced vibration-proof elements 18 will be connected to work, for example, made in the form of compression springs, since in the initial state their height is less than the total critical stroke elastic dish-shaped elements 1 and 2.

Sources of bibliographies cited in a patent search:

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 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 TD, 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 elastic dish-shaped element containing dish-shaped elastic surfaces in the form of a truncated cone with through grooves in them, connected by ribs directed along the lines forming the conical surface, two elastic dish-shaped elements opposite and axisymmetric to it are located relative to the dividing disk, and each of the dish-shaped elements contains a dish-shaped elastic a surface in the form of a truncated cone, on which is made in the plane parallel to the bases of the truncated cone, three through grooves with the formation of two x truncated conical surfaces connected by three ribs directed along the lines forming the conical surface, and damping cylinders made of injection molded polyurethane and entering with openings at the vertices of the truncated conical surfaces are fixed to the coaxial elastic elements in the central part of the separating disk, while the damping cylinders are connected between each other an elastic insert consisting of an axis passing through coaxial holes in the separation disk and damping cylinders, and thrust disks connected the upper and lower damping cylinders with the dividing disk, respectively, while the thrust plates of the elastic insert fix the elastic disk elements relative to the separation disk, reinforced vibration-proof elements are located in three through grooves of the elastic disk elements perpendicular to the separation disk, which are fixed respectively in three holes made in the peripheral part spacer disc, and made, for example, in the form of compression springs, characterized in that the thrust discs are resiliently inserts with an axis connecting the upper and lower damping cylinders with a separating disk are made of hard vibration damping material, such as plastic compounds such as Agate, Anti-Vibrate, Shvim, and the axis of the elastic insert is combined, consisting of a rigid core with a shell covering it from polyurethane.

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