SU841691A1 - Vibration exciter - Google Patents

Description

one

The invention relates to devices for oscillation and can be used in the manufacture and dynamic testing of building structures and structures.

A vibration exciter with two parallel shafts connected by synchronizing gears is known, in which directional oscillations of two different types can be obtained separately by changing the mutual arrangement of unbalances when reversing a drive engine due to the fact that one of the unbalances on each shaft is fixed rigidly and the other unbalance mounted movably and made with emphasis, interacting with a rigidly mounted on the shaft lead fl.

The closest technical solution to the invention in terms of the function performed and the effect achieved is a vibration exciter containing two parallel shafts with unbalances installed on them, one of which is reinforced, the others are rotatable using a powered mechanism and placed diagonally with respect to similar unbalances

another shaft, as well as a synchronizer of antiphase rotation of the shafts, consisting of mounted gears, each on its shaft, which engage the gears, and a reversing drive G2.

Known vibration exciters can produce no more than two types of directional oscillations separately, since their mechanisms have 2

0 degrees of freedom.

The purpose of the invention is to obtain in one device three types of directional oscillations separately (linear and torsional oscillations

5 relative to the vertical axis / and torsional vibrations relative to the horizontal axis) and four types of directional oscillations (linear and torsional; oscillations relative to the horizontal and vertical axes).

To obtain three types of oscillations, one of the gears of the synchronizer is installed with the possibility of rotation

5 and equipped with a drive mechanism installed counter-phase with the driving mechanism of rotational unbalances, and the reversing drive is equipped with a switching clutch, one of which has a half, the coupling of which is connected to

installed gear, and a friend with the shaft of this gear.

To obtain four types of oscillations, the vibration exciter is equipped with two analogous and additional $ Ls1MI with unbalances and two gear synchronizers, one of which includes gear with a driving mechanism and gears which are located diagonally in the horizontal and vertical planes relative to other gears of the other shafts and opposite to in relation to the rotationally established imbalances.

FIG. 1 shows a kinematic diagram of a vibration exciter for obtaining three types of directional oscillations; in fig. 2 - mutual arrangement of unbalances for obtaining: a) linear oscillations along the Z axis, b), c) torsional oscillations around the Z and Y axes, respectively; in FIG. 3 is a kinematic diagram of a vibration exciter for obtaining four types of directional oscillations, a section along the lower row of shafts; in FIG. 4, the same section along the upper row of shafts; in FIG. 5 - mutual arrangement of unbalances to obtain: a), b) straight line oscillations; c), d) torsional vibrations relative to the vertical and horizontal axes Z and Y, respectively.

The vibration exciter consists of the housing 1, in which the driver 2 and the driven 3 shafts are mounted on bearings. Swivel (free-running) unbalances 4 with the powered mechanisms 5, as well as rigidly fixed unbalances 6 are installed on the shafts. The same type of unbalances are placed diagonally with respect to the similar unbalances of the other shaft. On the drive shaft 2, a freely mounted synchronizing gear 7 with a pulley 8 is rotatably mounted relative to the shaft, equipped with a driving mechanism MOM 9 mounted counter-phase with the rotary unbalances 5, and a pulley 10. A synchronous gear 11 is mounted on the shaft 3. Pulleys 8 and 10 are connected by means of V-belts with coupling half coupling sleeves 12 and a driving reversing motor 13.

In order to obtain four kinds of oscillations, the vibration exciter is equipped with two more similar additional shafts 14, and 15 with unbalances and two gears L1MI synchronizers, one of which (left) includes gear 16 and gear 17 with a support mechanism 18, and the other (right) gear 19 , 20 and 21. Gears of the same type are placed diagonally in the horizontal and vertical planes with respect to the similar gears of the other shafts and oppositely with respect to the rotationally set unbalances.

Vibro works as follows.

The rotation of the drive motor shaft 13 is transmitted through the shift clutch 12 and the V-belt transmission to the drive shaft 2 and through the synchronizing gears 7, 11 to the driven shaft 3. Reversing the motor 13 and switching the clutch 12, you can get four different mutual positions of the unbalances and a drive shaft at a free-wheeling angle of the driving mechanisms and, accordingly, four types of oscillations, three of which are directional.

-h shaft 2

,, gear 7

 with

Shaft 2

Directed

2 a

Linear, axis Z 2 b

Torsional, Z axis

Table 6 shows the mode of oscillation depending on the direction of rotation of the engine (from the drive side) and the switching position of the coupling.

Claims (2)

1. A vibration exciter comprising two parallel shafts with unbalances mounted on them, one of which is strengthened, while others are installed pivotally with the aid of a support mechanism and placed diagonally with respect to the analogous unbalances of another Vsla, consisting of installed, each on its own shaft, which engage gears, and a reversing drive, characterized in that, in order to obtain three types of oscillations, separate linear and torsional oscillations relative to vertices tic axis and torsional oscillations about the horizontal axis, one of the synchronizer gears is installed with the possibility of rotation and is equipped with a driving mechanism, installed anti-phase to the driving mechanism of the rotary unbalances, and the reversing drive is equipped with a switching coupling, one of the coupling halves which is connected to a freely installed gear, hall of this gear. 2. The vibration exciter according to claim 1, differing in that, in order to obtain four types of oscillations, linear and torsional oscillations separately with respect to horizontal and vertical axes, it is equipped with two angshogic additional balances with synchronous and two gear synchronizers, one of which includes a gear nude with a driving mechanism, and the gears of which are placed diagonally in the horizontal and vertical planes with respect to the analogous gears of the other shafts and opposite to the rotation but established debalansam. Sources of information taken into account in the examination 1. USSR author's certificate No. 369937, cl. In About In 1/16, 1971. 2. USSR author's certificate No. 626838, class, В 06 В 1/16, 1978 (prototype). 5 h g x eleven (pur.3 fut. ie / - - X 17 18 If I Illi (pui.V g V5