CS231710B1 - Two-shaft vibrator with rotating unbalances for generating linear oscillations - Google Patents

Abstract

The invention relates to a two-shaft vibrator with rotating imbalances for generating rectilinear vibrations, consisting of two separate vibrator housings, in whose side walls two parallel shafts with imbalances are rollingly mounted, the axes of rotation of both shafts lie in the plane of width symmetry of the side walls of the vibrator housings, the essence of the invention being that at least one of the shafts 2, 2 is mounted with its axis of rotation eccentrically with respect to the center of gravity of the surface of the side wall 4, 4 of the vibrator housing 1, 1. The advantage of the vibrator according to the invention is that by mounting one or both vibrator housings in a different position and at the same place or by mutual displacement of the housings, a number of variants of the direction and place of action of the resultant of the vibrator pulse force can be achieved.

Description

BACKGROUND OF THE INVENTION The present invention relates to a twin-shaft vibrator with rotating unbalances for the generation of linear vibrations, in which the operative variability of the direction and location of the resultant of the pulsating traction force of the vibrator is solved.

. Two-shaft linear vibrators are known which operate on the principle of rotation of two shafts provided with unbalances in the mutually reversed sense of rotation. The resultant of the pulsating traction force of a vibrator of this type is assumed to be equal perpendicular to the axis axis of rotation of both shafts and bisects the line. The disadvantage of this arrangement is that it is not possible to change the direction and location of the resultant pulsating traction. forces. However, in the very frequent and desirable application of these vibrators to drive vibratory sorters, feeders, conveyors and other similar equipment working with bulk materials, the variability of the two parameters is desirable.

These drawbacks are eliminated by a two-shaft vibrator with rotating unbalances for the generation of rectilinear oscillations, consisting of two separate vibrator casings, in whose side walls two parallel unbalanced shafts are mounted, the axes of rotation of both shafts lie in a plane. is that the at least one shaft is mounted eccentrically with respect to the center of gravity of the side wall surface of the vibrator housing.

An advantage of the inventive vibrator is that by placing one or both of the vibrator housings in a different position and at the same location and / or moving the housings relative to one another, a variety of direction and location effects of the vibratory pulse force resultant can be provided.

For example, in the vibratory sorters, feeders and conveyors for bulk materials, the change in the direction of the resultant of the pulsating traction is the same as the change in the angle of throwing, whereas the change in the position of the resultant of the pulsating traction directly influences the path shape and vibration amplitude. Both of these changes have a major impact on the quality of sorting, transport speed and transport performance. By applying the vibrator according to the invention it is thus possible to ensure operative change of the main technological parameters of the vibrating devices.

'λ

1 shows a two-shaft vibrator, where the eccentricity of its shafts is equal in size to the weight of the side boxes, FIGS. .

Two structurally identical housings 1, 1 ' of the vibrator have axes of rotation of their shafts 2. 2 * with unbalance j, 3 'positioned relative to the center of gravity of the sidewall surfaces 4, 4 * with eccentricity E of equal size, but opposite. The housings 11, 1 are attached to the driven device 6 by screws 6, 6 '. which, by their principle of detachable connection, allow the choice of mutual placement of the housings J on the driven device and thus also the choice of the direction of the resultant of the pulsating traction force, which is represented in Fig. 1 by a two-way arrow.

Fig. 2 shows schematically variants of eccentricities E and relative positions of the housings 1, 1 where the eccentricities E of both shafts 2, 2 * and unbalances 3 * are always the same size with respect to the center of gravity of the side wall surfaces 4, 4 *. This arrangement offers the choice of three directions and three places of action of the resultant force.

Giant. 3 shows variants where only one of the shafts 2, 2 vůči is offset by eccentricity E relative to the center of gravity of the side wall surface 4 * and in this arrangement there is a choice of two directions and four positions.

The variants shown in FIG. 4 show cases where both shafts 21 '. the eccentricity of the side walls 1, 4 * is disposed relative to the center of gravity of the side walls, but this eccentricity is different for each shaft 2, 2 * in these variants. In this arrangement, four directions and five locations of the resultant of the vibrating pulsating force result.

Claims (1)

Τ δ Ε Β Μ Ě Τ OF THE INVENTION A two-shaft vibrator and rotating unbalances for the generation of rectilinear vibrations, consisting of two separate vibrator housings, in whose side walls two parallel unbalanced shafts are mounted, the axes of rotation of the two shafts lying in a plane of the width walls of the vibrator housings. 3. The method according to claim 1, characterized in that at least one of the shafts (2, 2 ') is mounted eccentrically with respect to the center of gravity of the side wall surface (4, 4') of the vibrator housing (1, 1 ').