SU406037A1 - HYDRAULIC VIBRATOR P "T;; '' Shd; i ;; - .-; '' ^ '^^^ - Google Patents

Description

The invention relates to mechanical engineering, mainly to oscillatory techniques.

Hydraulic vibrators are known, comprising a cylinder body with a differential piston and coaxial located in a new spool for reversing the piston.

The proposed vibrator differs from the known ones in that the spool is mounted with the possibility of displacement relative to the piston at the end of each stroke of the latter in the direction of its movement.

This increases reliability and simplifies the design of the vibrator.

The drawing shows a section of the pred by the j .ioro vibrator.

When the hydraulic vibrator is turned on, the flow of working fluid through the inlet / of the cylinder body 2, radial 3 II 4 differential piston 5 and spool 6 continuously enters the axial stepped channel 7 and into the cavity 8. First, additional hydraulic piston 9 and then the spool 6 are shifted left and right respectively until it stops.

As a result, the annular grooves of the 10 t II piston 5 communicate with the annular grooves 12 and 13 of the spool 6, and the working tray

fluid through the radial and axial channels 14 and 15 enters the rodless cavity J6 of the cylinder body 2 and moves the piston 5 together with the spool 6, which is attached to the head 17 of the piston 5.

After displacing the spool 6 to the right, while the piston 5 is in the left part of the cylinder body 2, the fluid located

in the CAVES 18 of spool 6 and 19, the piston, n 5, is displaced along obliquely to the channel 20 and the annular groove 21 for the spool 6 and respectively 22-24 for the piston to drain through the annular groove 25 into channel 26

in cylinder body 2.

When the piston is displaced about to the left until it stops, the annular groove 21 of the piston 5 is aligned with the annular groove 27 of the cylinder body 2, and the force of the working fluid flow flowing through the inclined channel 20 into the cavity 18 and acting on a larger spool area 6 than the area of the additional clamper 9, the spool 6 is displaced to the left, as from the opposite cavity 28 of the spool 6 the working fluid through channels 29 and 30 flows to the drain. In addition, the action of inertial forces when the piston 5 stops, the spool b continues to be left to the left by the amount of the free stroke

the plunger 9 in the cavity 8 of the spool 6.

After the spool 6 is displaced to the left, its annular grooves 13 and 12 communicate with the annular grooves 10 and 31 of the pistons and separate with the annular grooves 7 / and 10. The flow of working fluid I13 of the radial channel 3 through the channels 23 and 22 enters the rod cavity 19 of the cylinder body 2 , and from the brushless cavity 16 through the channels 15, 14, 29, 30; and 24 to the drain. Under the pressure of the working fluid, the piston 5 is freely displaced to the right together with, m to the end of the stem 32, the spool 6.

At the end of the piston stroke, under the action of inertial forces, the spool 6 continues to shift to the right, which also contributes

pressure of the working fluid continuously flowing into the cavity 8.

Subject invention

A hydraulic vibrator comprising a cylinder housing with a differential piston and a spool coaxially disposed therein for reversing the piston, characterized in that, in order to improve reliability - and simplify the design, the spool is displaced relative to the piston at the end of each stroke of the latter in the direction of its movement 1 .

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