SU1229329A1 - Hydraulic percussive device - Google Patents

Description

The invention relates to the mining industry and can be used to create impact devices for the destruction of soils.

The purpose of the invention is to increase the efficiency of the device by reducing mechanical friction during the working stroke of the striker.

FIG. 1 shows a hydrostatic device with a distribution unit in the open state (corresponding to the working stroke of the striker), FIG. 2 - the same, with the distribution node in the closed state (corresponds to the idle of the striker - platoon).

The device comprises a housing 1, a firing pin 2 with pistons 3 and 4 and a stem 5, pneumatic accumulator 6, cocking 7 and overflow chamber 8, pressure 9 and drain 10 hydraulic lines; On the piston 3 | An annular groove 11 is made. Inside the housing 1 there is located and fixed a distribution unit with a yoke 12, having a cylindrical elastic shut-off and regulating element 13 and forming with the housing 1 and the striker 2 cocking 7 and the overflow 8 chamber.

The rod 5 of the striker 2 is placed inside the other stop-regulating element 13 with the formation between them of the annular passage section 14.

Above the elastic element 13 there is an annular control cavity 15, which through the channel 16 and the tuning throttle 17 is connected with the charging chamber 7 and the pressure hydraulic line 9, and through the channel 18 and the annular

groove 1t - with drain hydroline 10. The outer diameter of the holder 12 is made equal to the diameter of the pistons 3 and 4 of the striker 2.

The device works as follows.

From the pressure line 9, the liquid is supplied to the charging chamber 7 through the annular passage section 14 into the overflow chamber 8 and further into the drainage line 10. shut-off and control element 13 (Fig. 2). A hydraulic percussion device (idle stroke of the striker 2) and gas compression in the pneumatic accumulator 6 occur.

At the end of the platoon control cavity

15 through channel 18 is connected to drain valve 10 through piston 11 of piston 3. Pressure over elastic element 13 drops, it deforms to form annular flow section 14 between rod 5 and elastic element 13. Under the action of compressed gas from pneumatic accumulator 6 striker 2

a working stroke is made, and the liquid is extruded from the charging chamber 7 into the overflow 8. From the overflow chamber 8, the liquid is displaced into the drain hydroline 10 by the piston 4 during idling of the striker.

The pressure build-up in the control cavity 15 is suppressed by the throttle 17, which is an element of the delay in channel 18. Then the working cycle repeats.

1

FIG. 2

Compiled by J.Strelov Editor O. Bugir Tehred I.Popovich Proofreader, A.T.

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Order 2427/27 Circulation 470 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d, 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (2)

1. HYDRAULIC DEVICE, including a housing, a striker with a rod and a piston, a distribution unit with a holder, a control cavity and an elastic locking and regulating element, a pneumatic accumulator, cocking and overflow chambers, a pressure and drain line, characterized in that, in order to increase the efficiency of the device by reducing mechanical friction during the working stroke of the striker, the distribution unit forms a cocking and overflow chambers with the housing and the striker, moreover, the striker rod is placed inside the elastic locking-regulating element to form m therebetween an annular passage population. 2. The device according to π. 1, t onl and the fact that the outer diameter of the casing of the distribution unit is made equal to the diameter of the piston striker. SU „„ 1229329