RU2549602C1 - Disk-shaped resilient element - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: disk-shaped resilient element comprises two disk-shaped resilient elements set symmetrically to a separating disk. Each resilient element comprises a dished 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 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. The damping cylinders are interconnected by a resilient insert consisting of an axle and thrust disks. The resilient insert axle passes through the holes in the separating disk and damping cylinders. The thrust disks of the resilient insert provide for the connection of the upper and lower damping cylinders with the separating disk and fixation of the resilient disk-shaped elements in respect to the separating disk.

EFFECT: increased efficiency of vibration isolation in a resonance mode.

2 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 are fixed in the central part of the separation disk and coaxial with the gaps entering at the vertices of the truncated conical surfaces, while the damping cylinders are interconnected by an elastic insert consisting of an axis passing through the coaxial holes in the separation disk and damping cylinders, 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.

Figure 1 shows the elastic element of the plate type with three ribs, figure 2 is a top view of figure 1.

The disk-shaped elastic element contains two elastic disk-shaped elements 1 and 2, (FIG. 1) opposite and axisymmetrically located relative to the separation disk 12, each of the disk-shaped elements 1 and 2 contains a disk-shaped elastic surface in the form of a truncated cone, on which is made in a 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 generatric conic surface lines. In the central part of the separation disk 12, coaxial to the elastic elements 1 and 2, damping cylinders 13 and 14 are made of injection molded polyurethane and enter with gaps 9 and 10, respectively, into the holes 13 at the vertices 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.

A possible embodiment of the separation disk 12 with internal cavities (not shown), filled with bulk material, increasing damping at the resonance.

Plate elastic element operates 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. The separation disk 12 has internal cavities filled with bulk material, and when passing vibrational frequencies coinciding with the natural frequencies of the material, a resonance phenomenon will be observed, which will increase damping in the system.

Sources of Bibliography Cited in 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 p.: P. 197, fig. 5.65.

2. Kochetov O.S. 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 (2)

1. The dish-shaped elastic element containing the 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, characterized in that two elastic dish-shaped elements are opposed and axisymmetric to it relative to the separation disk, and each of them is the dish-shaped elements comprises a dish-shaped elastic surface in the form of a truncated cone, on which there are three through grooves in a plane parallel to the bases of the truncated cone 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 gaps in the holes at the tops of the truncated conical surfaces are fixed to the coaxial elastic elements in the central part of the separation disk, while damping cylinders interconnected by an elastic insert consisting of an axis passing through coaxial holes in the separation disk and damping cylinders, and ornyh drives linking respectively the upper and lower damping cylinders with a separating disc, wherein the elastic thrust wheels fixed insert elastic elements relative Belleville separating disc. 2. The disk-shaped elastic element according to claim 1, characterized in that the separating disk is made with internal cavities filled with bulk material that increases damping at the resonance.

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