SU1406363A1 - Percussive device - Google Patents

Abstract

The invention relates to the mining industry and allows to increase the impact energy by reducing the pressure in the chamber (K) in the acceleration. Device- K 15. After striking the striker 2 through the tool 26 through the distributor 4. One of its K 5 controls is in communication with M 6, and the other with channel 8 of the control of housing 1. The striker 2 has a cavity in which sleeve 12 is fixedly mounted. a plunger 13 and a piston rod 14 with a piston outlet 14 in K 15 are mounted. The plunger 13 forms an additional K 16 acceleration with the sleeve 12 and is rigidly connected to the housing 1. Moreover, the K 16 communicates through a check valve 9 and a throttle 11 with a channel 8, and To 15 communicated through the second check valve 10 with M 6. When the movement of the striker 2 and the stem 14 to the left pressure in K 16 lower The battery, 17, is discharged, gives up part of the energy in K 15. After striking the striker 2 in the SL

Description

The structure includes a housing 1, in which the firing pin 2 with grooves is movably mounted, which forms a K 15 acceleration and a K 25 platoon with a housing. Moreover, K 15 is connected with the battery 17 and the pressure line (M) 6, and K 25 is connected alternately with M 6 or the drain

3 K 5 and 16 are connected to M26, aK25-sMb. Pin 2 with stem 14 begins to move to the right. During the charging of the striker 2, a battery of 20 M is charged. At the end of the platoon, K 25 connects cm26, a1b-cmb. The cycle is repeated. 2 Il.

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The invention relates to the mining industry, namely to impact devices for the destruction of rocks and artificial materials.

The purpose of the invention is to strike the impact energy by reducing the pressure drop in the acceleration chamber.

Fig, 1 shows the device at the beginning of the acceleration of the striker; Fig 2 is the same at the beginning of the platoon.

The percussion device is co-operative (Holds body 1, in which, with the possibility of completeness,

The displacement is set up by a dimple 2 with grooves, a tool 3 and a distributor 4j, one control chamber 5 of which is connected to a pressure line 6, and the other is connected to channel 8 of the control of housing 1. The device is equipped with check valves 9 and 10, throttle 11, sleeve .12, the plunger 13 and the rod 14 with a piston.

Pin 2 was made with a cavity in which ytulet 12 was fixedly mounted, forming an acceleration chamber 15. The rod 14 with the piston is installed in the sleeve 12 with the output of the rod in the camera 15 acceleration. The plunger 13 is installed in the sleeve 12, forming an additional camera 16 pas, and is rigidly connected to the housing 1, the additional acceleration chamber 16 through the check valve 9 and the throttle 11 communicates with the control channel 8 of the housing 1. The acceleration chamber 15 communicates with the battery 17 and through a check valve 9 with a pressure line 6,

The cavity 18 formed by the rod 14 and the sleeve 12, and the cavity 19, formed by the housing 1, the spring rim 13 and the sleeve 1.2, communicate with the drainage. Pressure line 6 has a battery 20,

The spool 21 of the distributor is made with an annular groove 22 and pushers 23 and 24, and the pusher 24 is made with a large working area. The platoon chamber 25 is connected via a distributor 4 to a pressure 6 I1sh drain 26 lines

The device works as follows.

In the position shown in FIG. 1, the platoon chamber 25 is connected via the spool 21 to the drain line 26, and the acceleration chamber 16 through the control channel 8 is connected to the pressure line .6. Under the action of the difference of forces, arises;

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the accelerator 2 starts moving to the left, increasing its speed as it approaches tool 3. Simultaneously with the movement of the striker 2, the rod 14 moves to the left. At the first stage of acceleration, when the accumulator 20 is low, due to the larger area of the end surface of the piston rod 14 with respect to the end surface of this rod, located in the acceleration chamber 15, the pressure in this chamber increases slightly and the pedroaccumulator 17 is charged. With continued acceleration of the striker 2, the pressure in the acceleration chamber 16 will decrease by increasing the volume of this chamber and discharging the guide, roaccumulator 20. Despite this, due to the different end surfaces of the rod 14, the force on this rod from the acceleration chamber 16 will be sufficient , in order to prevent a decrease in pressure in the chamber 13 of acceleration. By the end of the acceleration of the striker 2, the hydroaccumulator 17 will be discharged and will give some of its energy to the chamber

15th run. Thus, the volume of the camera 15 acceleration during the entire working stroke of the striker 2 is practically unchanged, which is achieved due to the larger volume of the rear camera

16 acceleration with respect to the acceleration chamber 15 and, consequently, more discharge of the hydraulic accumulator 20 to the acceleration chamber 16 and the realization of this energy through the movable rod 14 to maintain the constant volume of the chamber

15th run. The pressure in the chamber 15 is accelerated and the energy of impact of the device of the proposed construction at the end of acceleration is 10-15% higher than that of the device with a variable volume of the chamber of acceleration. After the strike by the hammer 2 on the tool 3, the control channel 8 (FIG. 2) connects the chamber 5 and the chamber

16, with a discharge line 26. The pusher 23 under the action of pressure pressure, which is constantly supplied to chamber 7, will move the spool 21 to the right and the platoon chamber 25 will connect to the discharge line 6. Since the working area of the striker 2 on the side of the platoon chamber 25 is larger than camera 15 acceleration, the striker 2 will begin to move to the right. Simultaneously with the movement of the striker 2, the rod 14 will move to the right, since

23 22 21 2 5

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FIG. 2

Claims (1)

Claim A percussion device, ₂ 0 comprising a housing in which, with the possibility of reciprocating movement, a striker with grooves is installed, forming an acceleration chamber connected to the battery 25 and the pressure line and a platoon chamber alternately connected with the pressure or drain lines through the distributor, one control chamber which is in communication with the pressure line, and the other with the control channel of the housing, characterized in that, in order to increase the impact energy by reducing the pressure drop in the chamber gon, the device is equipped with two non-return valves, a throttle, a sleeve, a plunger ·· 'rum and a rod with a piston, and the hammer is made with a cavity in which the sleeve is fixedly mounted, forming an acceleration chamber, and the rod with the piston is installed in the sleeve with the rod exit to the camera acceleration, while the plunger is installed in the sleeve, forming an additional acceleration chamber, and is rigidly connected to the housing, and the additional acceleration chamber through the check valve and throttle is in communication with the control channel of the housing, the acceleration chamber is communicated with the pressure line through another th check valve. 7 23 22 21 2 b 5 FIG. 2