SU422473A1 - PLANETARY VIBRATOR - Google Patents

Description

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This invention relates to devices for driving oscillations. It can be used as a vibrodrive of various technological machines and test benches.

Two-frequency planetary vibrators are known, which include a frame, rolling tracks and unbalance in the form of a runner, in which two-frequency oscillations occur when the planetary run-in is unbalanced by the rolling tracks.

The purpose of the invention is to obtain polyfrequency oscillations of a given range.

The proposed planetary vibrator differs from the known ones in that it is made with an additional unbalance in the form of a cylinder, in which an slider interacting with it is arranged in gear into its internal cavity.

FIG. 1 shows the proposed vibrator, a longitudinal section; on fit. 2 - vibrator together with a driving motor.

The planetary vibrator contains a bed 1 with end caps 2, supported by rolling bearings 3, an additional imbalance — cylinder 4, unbalanced about its geometrical axis due to the presence of tide 5. The cylinder with internal gear engages gear

7 slider 8 placed inside the cylinder and resting on the raceways in the end caps. The slider is also unbalanced by debalance 9. At the ends of the slider and on

covers and: 1euts are conical spikes 10, which prevent axial displacement of the slider during operation and ensure its certain position at launch. On the outer surface of the cylinder there is a wedge groove,

in which the driving V-belt 11 is placed. The driving electric motor 12 with a pulley is mounted on a separate frame. When the cylinder rotates, slider 8 gets a rotation around its axis. Arising

the centrifugal unbalance force 9 of the slider presses the slider against the raceways in the end caps 2 and causes it to rotate about the axis of the vibrator. The centrifugal force of the portable movement of the entire mass of the slider ensures that it is run in without slipping.

The total driving force generated by the vibrator is made up of three components:

1) the centrifugal force of the cylinder 4 P t e sots with frequency Shz;

2) centrifugal force unbalance 9 slider

PZ - m2e2 (0g

with frequency

“,

thirty

3) the centrifugal force of the portable movement that occurs when the runner is run in

L ("2 + Pz)

with frequency

TO.

obk

/,

where: mi is the unbalance mass of the cylinder, / P2 is the unbalance mass 9 of the slider; / From - the mass of the slider; Scr - angle of the cylinder 4; Si - cylinder eccentricity unbalance; 62 - eccentricity of the unbalance of the slider; Ez - - the eccentricity of the slider; R is the radius of the initial circumference of the ring gear 6;

2 - the radius of the initial circle of gear 7;

 -radius running cylinder slider. The phase angles of the constituent oscillations can be ensured by

the jagged part of the raceways (along the length) of the slider and end caps.

The proposed planetary vibrator can excite multi-frequency oscillations in a very wide frequency range. By varying the geometric dimensions of the parts of the vibrator and the magnitude of the unbalanced masses, it is possible to obtain a complex shape of the resulting oscillations.

Subject invention

A planetary vibrator containing a frame interacting with the help of raceways formed in its end caps with unbalance in the form of a slider, characterized in that, in order to obtain polyfrequency oscillations of a given range, the vibrator is made with an additional unbalance in the form of a cylinder, in which internal interaction is located with it with the help of gearing the slider.

/ IA

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