SU364355A1 - BALANCING VIBRATION AGENT - Google Patents

Description

one

Unbalance exciters are known that contain an orus, in bearings of which hollow shafts equipped with longitudinal grooves are installed, on the seats of which unbalances consisting of moving and stationary parts are fixed, with moving parts mounted with seric bushes with an oblique groove and fingers placed in the hollow shafts and interconnected adjusting device rods.

The purpose of the present invention is to eliminate resonant oscillations during the start and stop of the exciter and to make it possible to control the magnitude of the disturbing force during operation.

This is achieved by the fact that the shafts for the moving parts of the unplice are made in the form of eccentrics, and the rods are spring-loaded, and the adjustment device connecting the pins is equipped with a movable limiter for the turning angle of the moving parts of the unbalances.

On the fit. 1 schematically depicts the described exciter pathogen in section; in fig. 2 and 3 are sections along A-A and BB in FIG. one.

The oscillation pathogen consists of two identical para-shaft shafts 1 to 2 mounted on bearings 3 in one common housing 4. The shafts are equipped with eccentrics 5,

On which are mounted vty.tki 6 with rigidly planted on PPH mobile parts debalapsO 7, Having 8.

In the sleeve there are screw grooves 9 (shown as a dotted line) in which the ends of the finger 10 inserted into the longitudinal grooves // of the shafts are inserted.

In order to reduce the friction, the contact of the pallet with the holes is made through the bearings 12.

0

The moving parts of the unbalance are held in a balanced position with rigidly mounted on the shafts U and 2 fixed parts of the unbalances 13 compression spring 14 through the rod 15 and the finger 10 through a screw.

5 slots in the sleeve.

At the end of the stem there are grooves into which the end of the pivoting lever 16 of the adjusting device enters. Shaft 17 rotates this growl at an angle proportional to

0 stock travel 15.

Thus, the shaft 17 rigidly connects the moving parts of the unbalances 7 on the shafts 1 and 2 connected with it and does not allow the rotation of one without the corresponding rotation of the other.

five

On the shaft 17, a lever 18 is rigidly fixed, the rotation of which is limited by an adjustable bolt 19 and a stop. 20.

The latter is connected via a drive shaft 21 connected with the handle S2.

The causative agent of oscillations works in the following way. When the electric motor is turned on, the rotation from the ball / through the unsettled parts of the unbalances 13 and at the op 8 is transmitted to the movable parts of the unbalances 7. So, when starting, the unbalances on the shafts 1 to 2 are in a balanced position (see Fig. 2), The power of the electric motor is mainly used to overcome the inertia of the rotating masses of the vibrator. When the shafts reach their nominal revolutions, the value of the Center Avoidable turning points in the moving parts of the debalance 7 becomes greater than the sum of the moments holding them in their original position (from the action of the spring, friction and its own weight), due to which the moving parts of the debalans turn to contact with the fixed parts unbalances 13 and disturbing forces arise that contain directional oscillations (cm. of fig. 4).

When rotating the moving parts of debalapses 7 with SCREW grooves 9 in 6, the fingers 10 are displaced along the grooves // together with the rods 15, compressing the springs 14. Displacement of the stock leads to rotation of the levers / 5, and hence the shaft 17 from the rig / S to the stop in limiter 20.

A complete rotation of the moving parts of the unbalance 7 gives the maximum disturbing force. When unscrewing the bolt 19, the rotation of the moving parts of the debalapses 7 can be reduced to 0. Thus, it is possible to adjust the perturbing force, and hence the amplitude of oscillations on the go.

The presence of a rigid connection between the moving parts of the unbalances 7 through the means of levers 16

And the shaft 17, in addition to the possibility of adjustment, ensures strict synchronization of the turns of the moving parts of the unbalance and excludes the possibility of the occurrence of dangerous transverse perturbing forces.

When the oscillation exciter stops, when the shafts / and 2 gradually reduce the speed and the centrifugal moment of the moving parts of the unbalances 7 falls to a predetermined limit (before resonance), the springs 14 return the subtotals of the unbalances to a balanced position with the fixed parts of the unbalances 13.

Prev Invention

An unbalanced oscillation pathogen, comprising a housing, in bearings of which hollow shafts with longitudinal grooves are installed, on which seats there are unbalances consisting of moving and stationary parts, the moving parts being mounted on shafts by means of sleeves with an oblique groove and connected by fingers placed in hollow shafts and connected-between themselves adjustable-ch.m device shtya-mi, characterized in that, in order to eliminate resonant oscillations during the start and stop of the causative agent cola The adjustment of the shaft of the disturbing force during operation, the shafts for the moving parts of the unbalance are made in the form of eccentrics, and the rods are spring-loaded, and the adjustment device is equipped with a movable limiter of the rotational angle of the moving parts of the debalance.