SU813078A1 - Frame - Google Patents

Description

(54) BED

The invention relates to the MGI foreign engineering, specifically to the beds of machines.

A well-known bed is made containing corollate beams-walls, an anchor and a grouse flange. The internal cavity of the beams is filled with a vibration absorber; material l.

The disadvantage of this design is its low absorption capacity at frequencies of external oscillations of less than 1 kHz and a significant consumption of vibroabsorbing material.

A known bed containing support flanges, walls, stiffening ribs, vibration absorbers, made in the form of layers of a vibration-absorbing substance deposited on flanges G2.

 This design is also characterized by insufficient damping capacity, because when an oscillation with a frequency of less than 1 kHz is excited, the vibratory absorber is inefficient and, moreover, the consumption of the vibration-absorbing substance is very significant.

The purpose of the invention is to increase the damping capacity of the bed and reduce the consumption of the vibration-absorbing substance.

This goal is achieved by the fact that in a frame containing support flanges, walls, stiffeners and vibropoglo, tillers, the next are mounted on the walls and the ribs and stiffeners and made in the form of elastic plates with a layer of material and inertial masses.

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In addition, in order to reduce the vibrating material, vibratory absorbers are installed in the places of antinodes of oscillations of the bed.

Figure 1 shows a bed, a general view; figure 2 is the same, horizontal section; on fig.Z - section of the bed in an enlarged scale; figure 4 is a cross section.

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The bed contains walls 1, stiffening ribs 2, bearing flanges 3 and 4; The listed elements form box girders. Vibration absorbers are made in the form of elastic plates 5 mounted on flanges 6, a vibration-absorbing layer 7 is applied to the plates. Inertial masses 8 are mounted on plates 5 attached to flanges 6 by bolts 19 and 10.

Claims (2)

0 The oscillations of the frame, excited by the mechanisms installed on it, are absorbed by the plates 5. The thickness of these plates, the number of their edges attached to the walls and the edges of the base, the magnitude of the inertia masses, are chosen from the conditions of coincidence of the frequency of the own vibrations of the vibration absorber with one of the frequencies of the station oscillation. Thus, for example, plate 11 is fastened in three directions, and plate 12 along two edges, vibration dampers are placed in places where the bed oscillates, which ensures the most effective damping. The large amplitude of oscillation of the elastic plates allows efficient use of the vibration-absorbing material & Thus, with a plate thickness of 0.830 mm, the thickness of the layer of vibration-absorbing substance is 1.5-2.0 mm. When the plates are located along the height of the walls in 3-6 rows, the total thickness of the layer is 15-30 mm, instead of the layer with a thickness of 60-80 mm applied to the flange of the known bed. The combined use of elastic plates, a vibration-absorbing substance, in the form of a layer deposited on these plates, and inertial masses provides effective damping due to an increase in the loss of kinetic energy of oscillations excited in the bed / 7 external sources. At the same time, the absorption coefficient of the bed, estimated as the ratio of the applied and the absorbed energies are about three times higher in comparison with the known beds. Claim 1. Stanin containing support flanges, walls, stiffening ribs, vibration absorbers, characterized in that, in order to reduce the damping capacity, vibration absorbers are installed on the walls and edges of the plastic and are made in the form of elastic plates coated with a layer of vibration-absorbing substance and inertial masses. 2. Stanin, according to claim 1, characterized in that, in order to reduce the consumption of the vibration-absorbing substance, the vibration absorbers are installed in the places of the antinodes of its oscillations. Sources of information taken into account in the examination 1. US patent 3566710, cl. 74-443,1971. 2. Vasiliev A.L., Glozman M.K. , Golubev V.A., Sbelovsky A.N. Ship foundations. L., Shipbuilding. 1959, p. 177. / fL tj5 ff 6 ig.Z H; tK $ S: SSS $$$ S: SS $ f ".