RU2597734C2 - Plate vibration isolator - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to machine building. Vibration isolator contains a frame designed as an upper platform for installation vibration isolated object and a lower base for arranging of stroke limiters of the unit of disk-shaped elastic elements. Adjustment plate is fixed to the upper platform by means of fastening elements. Elastic elements connect the upper platform to the lower base, on which a baffle plate is placed. Base of the frame vibration isolator in the place of contact with disk-shaped elastic elements is coated with a frictional material. Unit of disk-shaped elastic elements consists of four belleville springs of various height and angle of inclination to the vibration isolator axle. Belleville washers through spacer rings are placed on the vibration isolator axle and fixed with the help threaded chank and nut. Each of belleville washers has in a base a horizontal ring annular circular beading, resting on the lower base. Vibration isolator axle is rigidly connected to upper platform of frame. Spacer rings are made from vibration damping material, for example polyurethane. Annular flanged edges on the side in contact with base, are coated with friction material layer.

EFFECT: improved efficiency in resonant mode of vibration isolation.

1 cl, 1 dwg

Description

The vibration isolator refers to the means of protecting a human operator from the harmful effects of vibration and can be used in various machines and mechanisms, in particular in the machine tool industry, textile and light industry, agriculture, instrument making, and transport engineering.

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 diameters 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 packets 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 a plate vibration isolator containing a frame in the form of an upper platform for installing a vibroinsulated object with an alignment plate that is attached to the upper platform of the vibration isolator frame by means of fasteners, the lower base serves to accommodate the stroke limiters of the block of elastic disk elements that connect the upper platform with the lower base of the vibration isolator having a buffer type bump, and the base of the vibration isolator frame, in terms of contact with the elastic disk and the elements are covered with friction material for damping vibrations, and the block of disk-shaped elastic elements consists of at least four disk-shaped springs of different heights and different angles of inclination to the axis of the vibration isolator frame with a threaded shank and a nut on which disk-shaped springs are fixed through spacer rings, wherein each of the disk springs has a horizontal annular flange at the base, resting on the lower base, and the axis of the vibration isolator is rigidly connected to the upper platform of the frame.

The drawing shows a frontal section of a plate vibration isolator.

The vibration-isolating plate contains a frame in the form of an upper platform 3 for installing a vibration-isolating object 1 with an adjustment plate 2, which is attached to the upper platform 3 of the vibration isolator frame by means of fasteners 4, and the lower base 13 of the vibration isolator to accommodate travel limiters 16 and 17 of the plate-shaped elastic elements, which connect the upper platform 3 with the lower base 13 of the vibration isolator with the chipper 14 buffer type. The lower base 13 of the vibration isolator frame, in terms of contact with the disk-shaped elastic elements, is covered with friction material for damping vibrations.

The block of disk-shaped elastic elements consists of at least four disk-shaped springs 5, 6, 7, 8 of different heights and different angle of inclination to the axis 9 of the vibration isolator frame with a threaded shank 10 and a nut 11, on which disk-shaped springs are fixed through spacer rings 12. Each of the disk springs 5, 6, 7, 8 have a horizontal annular flange at the base resting on the lower base 13 (for example, the outer disk spring 8 has an annular flange 15).

The axis 9 of the vibration isolator is rigidly connected to the upper platform 3 of the frame.

Spacing rings 12 located on the axis 9, rigidly connected to the upper platform 3 of the frame, which fix the disk cup springs 5, 6, 7, 8 on the rod, are made of vibration damping material, for example polyurethane.

It is possible that the annular flanges of the disk springs 5, 6, 7, 8 (for example, the flanging 15 for the outer disk spring 8), on the side in contact with the base 13, are coated with a layer of friction material.

Vibration isolator works as follows.

When a static load is applied to the upper platform 3 of the carcass, it falls down, compressing the disk-shaped elastic elements 5, 6, 7, 8, which perceive vertical loads, thereby weakening the dynamic effect on the base 13 installed on the floor of the building or chassis of the vehicle ( not shown in the drawing). Nonlinear damping in the system is due to the presence of stroke limiters 16 and 17 of the outer disk spring 8.

When a dynamic load is applied from the side of an object, for example, operating equipment, the vibration is damped by a block of elastic disk elements, the rigidity of which is calculated to operate the complex system “overlap - elastic elements - object” in the resonance mode, while providing spatial vibration protection and shock protection. The damping of the vibration-insulated object 1 at high frequencies increases due to dry friction, which provides the necessary damping in the system at resonance. The effect of dry friction is realized by horizontal annular flanges of elastic disk elements that slide in dynamic modes along the friction coating of the lower base 13 of the vibration isolator frame.

The proposed technical solution is an effective vibration-protective tool that can be used to protect both equipment and the operator, with ease of maintenance and reliability of the structure in operation.

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 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)

The vibration-isolating plate containing the platform, the base, the plate-shaped elastic elements comprises a frame in the form of an upper platform for installing a vibration-isolating object with an adjustment plate, which is attached to the upper platform of the vibration-isolation frame by means of fasteners, and a lower base for accommodating the stroke limiters of the plate-shaped elastic elements, which connect the upper platform to the lower base of the vibration isolator having a buffer type bump, and the base of the vibration isolator frame in part the act with plate elastic elements is covered with friction material for damping vibrations, and the block of disk elastic elements consists of at least four disk springs of different heights and different angles of inclination to the axis of the vibration isolator frame with a threaded shank and a nut on which plate springs are fixed through rings, with each of the cup springs having a horizontal annular flange at the base, resting on the lower base, and the axis of the vibration isolator is rigidly connected to an upper platform of the frame, spacing rings located on an axis rigidly connected to the upper platform of the frame, which fix the disk springs to the rod, are made of vibration damping material, such as polyurethane, characterized in that the ring flanges of the spring springs on the side in contact with the base are coated with a layer friction material.

Images