RU2478845C1 - Rope vibration isolator - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: vibration isolator includes an elastic element in the form of a spiral from steel rope, a pair of external plates and a pair of internal plates, which are fixed to each other by means of fasteners. Internal plates are provided with slots to envelope and fix a steel rope on two diametrically opposite sides. Slots are made only on internal plates and have the shape of a hole that is torn up along chord of the circle. Distance from chord of the circle to the axis of hole is (0.3-0.4) of the hole diameter.

EFFECT: simpler manufacturing technology and increase in vibration isolation efficiency.

5 dwg

Description

The invention relates to vibration-isolating devices and can be used in any field, for example, shipbuilding, aircraft manufacturing, astronautics, nuclear energy, power engineering, automotive, underground and ground rail transport to protect various objects from vibration, shock and shock.

Cable vibration isolators are widely known from information sources, for example [1-4].

Known cable vibration isolators contain an elastic element in the form of segments of a steel rope [1] or in the form of spirals from a steel rope [2-4], two pairs of round - circular [1-4, Figs. 2, 6, 7] and rectangular [4 1, 3-5] of the plates - the outer and inner, respectively, with radial [1-3, 4, FIG. 2, 6, 7] or transverse [4, FIG. 1, 3-5] grooves for girth and fixing pieces of rope [1] or turns [2-4] of the spiral from two diametrically opposite sides, fastened together by fastening means.

The technical solution closest in the set of essential features is the invention [4], adopted as a prototype, with transverse semicircular grooves on the inner surfaces for grasping and fixing the turns of the spiral from two diametrically opposite sides, fastened together by fastening means.

The problem faced by the creators of rope vibration isolators is the fastening of the rope in the corresponding grooves of the outer and inner pairs of plates [1-4].

The disadvantages of the known cable vibration isolators are:

1. Insufficiently tight placement, poor adhesion, and therefore, unreliable and uneven fixation of the rope in the semicircular grooves of the two outer and inner pairs of plates;

2. Insufficient rigidity of the outer and inner plates;

3. The complexity of manufacturing technology.

These shortcomings reduce the effectiveness of vibration protection of cable vibration isolators.

The invention is aimed at eliminating these disadvantages and their improvement. The technical result of the invention is the simplification of manufacturing technology and increase the efficiency of vibrational protection of cable vibration isolators.

The technical result is achieved by the fact that:

1. The grooves are made only on the inner plates;

2. The grooves are made in the form of a circular circle torn along the chord from the side of the inner surface of the (inner) hole plates;

3. The distance from the chord of a circle or otherwise from the inner surface of the plate to the axis of the hole is (0.3-0.4) d, where d is the diameter of the hole. It is selected depending on the design of the rope in the range.

Holes broken along a chord of a circle only on the inner plates of the cable vibration isolators, unlike two identical opposite grooves on the inner and outer supporting plates of the prototype [4], are obtained in one operation — drilling holes with a distance from the surface of the inner plate to the axis of the hole equal to 0.3-0 , 4 from the diameter of the rope without milling.

Outer plates, unlike the prototype [4], are made smooth without grooves, which can be made with either a smaller or a larger thickness.

The placement of the steel rope only in the grooves in the form of a circumference torn around the chord of the inner slats allows you to provide the most continuous perimeter of the girth of the rope (unlike the prototype). In this case, the outer plate closes the broken circle along the chord, completely blocking the rope from all sides. The perimeter of the rope within the width of the plates becomes smaller than outside the plates, that is, the working parts of the rope elastic element.

Achieved reliable fixation of the rope in the supporting elements during complex deformations (bending, tension, shear, torsion) improves the elastic-damping characteristics of the rope and achieve high efficiency of vibration protection of the vibration isolator.

The invention is illustrated by drawings, which depict:

figure 1 is a view of a spiral cable vibration isolator with rectangular plates;

figure 2 is a view of a cable vibration absorber with round plates and arcuate segments of a steel rope;

figure 3 is a view of a toroidal spiral vibration absorber with round plates;

figure 4 is a view (part) of the inner plate with a groove, inside which the rope is placed in a free state (cross section), the outer plate and fastening means in a free state, and in figure 5 - in a tightly clamped (working) state.

The rope vibration isolator contains an elastic element 1, two pairs of outer 2, 4 and inner 3, 5 plates with transverse grooves A (Figs. 1-5), made on the inner plates 3, 5, and fastening means, for example, screws 6 for fixing the steel rope elastic element 1.

The grooves A in the inner plates 3, 5 are made in the form of a circular hole circumference torn along the chord of the aircraft (Figs. 4, 5). The distance L (Fig.4, 5) from the chord BC (Fig.4) or otherwise from the inner surface of the plate 3 (or 5) to the axis O of the hole is:

L = (0.3-0.4) d, where d is the diameter of the hole (Fig. 4, 5).

This distance is selected depending on the design of the rope according to the assortment and can be verified empirically.

This distance L (Fig. 4, 5), respectively, increases the thickness of the inner plates 3, 5 (Figs. 1-5), therefore, their rigidity. In this case, the thickness of the outer plates 2, 4 (Figs. 1-5) decreases by the value of the radius of the circle A or can be increased as necessary.

Reliability of the clutch - fixing the elastic element of the rope 1 in the grooves with the walls And (figure 5) is provided as follows.

The strands and wires of the steel rope in a free state (Fig. 4) are relative to each other in an insufficiently densely located state due to their elasticity, round shape, weaving, winding, etc. Therefore, free spaces are formed between them, which are indicated in FIG. 4 by D.

When fastening with the outer plates 2, 4 (Figs. 1-5) by pressing them with fastening means 6 (Figs. 4, 5), the strands with wires sliding against each other begin to oppress, gradually occupying an empty space. With further tightening of the fastening means 6, they are snug against the walls A of the grooves practically around the entire perimeter (Fig. 5), thus ensuring reliable fixation of the rope in the grooves.

It should be noted that the proposed technical solution extends not only to the vibration isolators shown as examples in FIGS. 1-3, but also to other cable and combined vibration isolators with composite structures of the base plates.

The applicant is not aware of any technical solutions containing features identical to those of the invention: what determines, according to the applicant, the compliance of the invention with the criterion of “novelty”.

The implementation of the differences of the present invention (in combination with the characteristics given in the characterizing part of the formula) ensures the achievement of new properties (technical effect) of the claimed object:

1. Significantly increases the uniformity and reliability of the fixation of the rope in the grooves And the inner plates 3, 5 (Fig.1-3, 5);

2. The technology of manufacturing cable vibration isolators is simplified.

3. Achieved high efficiency of vibration protection of the vibration isolator (from 15 to 50 dB).

Information sources

1. Vibration isolating support of the internal combustion engine. RF patent No. 2037691, cl. F16F 7/14. 06/19/1995. Bull. No. 17 (figures 1, 2).

2. Vibration isolating engine support. RF patent №2040716, cl. F16F 7/14. 07/27/1995. Bull. No. 21 (figures 1, 2).

3. Vibration isolating support. RF patent No. 2219395, cl. F16F 7/14. 12/20/2003. Bull. No. 35 (figures 2, 3).

4. Vibration isolating support of the internal combustion engine. RF patent No. 2185534, cl. F16F 7/14. 07/20/2002. Bull. No. 2 [(Fig.1-8), prototype].

Claims (1)

A rope vibration isolator containing an elastic element in the form of a spiral from a steel rope, a pair of outer and inner plates with grooves for gripping and fixing the spiral of the rope from two diametrically opposite sides, fastened together by fastening means, characterized in that the grooves are made only on the inner plates and have the shape of the hole torn around the chord of the hole, while the distance from the chord of the circle to the axis of the hole is (0.3-0.4) d, where d is the diameter of the hole.

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