SU1416683A1 - Hydraulic percussive system of mining machine - Google Patents

Abstract

The invention relates to the mining industry and is intended for the destruction of rocks. The goal is to increase the reliability of the machine operation by eliminating the operation of the hydraulic shock device (CU) when its tool (I) 6 is lost from contact with the face. For this, the housing 8 of each SU is made with an additional bore 29, forming a brake chamber 30 with the piston-brisk (PB) 9. A choke channel 31 communicates with the brake chamber 30 and is located in PB 9 with the possibility of communicating with the working chamber 17. In the absence of contact And 6 with the bottom And 6 and PB 9 upper UU na-. dts in the leftmost position. The chamber 30 is isolated from the pressure line 13 and connected through channel 31 to the chamber 17. Under the action of the load, And 6 is shifted to the extreme right position, and the PB 9 of the lower UU finds-g s in the working position. Camera 16 idling when it is communicated through the highway 13c camera 30. 2 Il. with. 3 (L s

Description

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This invention relates to a mountain range, namely to a device. you for the destruction of rocks.

. The purpose of the invention is to increase the reliability of the machine by eliminating the work of the percussion device when its tool makes contact with the face.

FIG. 1 and 2 shows a diagram of the proposed mining machine system.

The hydraulic shock system of the mining machine contains an adjustable hydraulic pump 1 with a pump feed change regulator having a piston 2, a control piston chamber 3 and a pressure spool 4 with an adjusting spring 5 and hydraulic shock devices each of which includes tool 6 with a spring 7, housing 20 8, piston-block 9, valve 10, control with plunger 11, pressure accumulator 12, pressure 13, drain 14 hydraulic lines. A cylindrical key 15 locks the stroke of the tool and fixes its rotation relative to the body. The firing piston and housing form the idle chamber 16 and the chamber 17 workers 15

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The housing 8 of each hydraulic percussion device is made with an additional ratchet 29, which forms the brake chamber 30 with the piston-striker 9, and the piston-hammer 9 is configured with a throttle channel 31 communicated with the brake chamber 30 and communicating with the working stroke chamber. (

In the absence of contact of the tool with the bottom (top device in FIG. 2), the tool 6 and the piston block 9 are in the leftmost position, in which the brake chamber 30 is isolated from the pressure line 13 and connected through the throttle channel 31 to the working chamber 17 stroke, and under the action of the load (lower device in Fig. 2) the tool is displaced to the extreme right position, and the firing piston is in the working position, at which the idle chamber 16, connected to the pressure chamber 13, communicates with the brake chamber 30. When giving fluid od line pressure upper piston-anvil impact device remains

in the left position, and a piston-gun turn, which has a larger area of 30 lower impact devices under the cross section than the chamber 16.

The liquid entering the chamber 16 is idled by moving the fluid to the right, 5 displacing the fluid from the chamber 17 of the stroke into the drain line and moving the spool 10 in the right position. At the end of the movement of the piston-block 9 to the right, an annular groove 20 connects the control channel 21 with the idling chamber 16 and the pressure line 13, as a result of which the liquid enters the control chamber 18, the cross section of which is more effective than the cross section of the interstitial chamber 25 and moves zoI. .

The left end of the spool 10 is constantly in contact with the plunger 11 having a control chamber 18 connected by means of the control channel 35 19 to the annular groove 20 on the piston striker, depending on the position of the piston block in the housing or with a drain control channel 21, 40 permanently connected to the drain line 14 through the left end chamber 22, the axial channel 23 and the right end chamber 24 of the spool. The golden flow of the liquid entering the chamber 16 is moved to the right, 5 displaces the liquid from the working stroke chamber 17 to the drain line and moves the spool 10 in the right position. At the end of the movement of the piston-block 9 to the right, an annular groove 20 connects the control channel 21 with the idling chamber 16 and the pressure line 13, as a result of which the liquid enters the control chamber 18, the cross section of which is more effective than the cross section of the interstitial chamber 25 , and moves zonik has two workers for ska, with 45 wrecks 10 in the right position, the diameter of the left (sealing) ska is larger than the diameter of the right (distribution) trap, and the interfacial chamber 25 is connected to the pressure line 13 and the pressure accumulator torus 12 by a flow channel 26. The chamber 17 of the working stroke is constantly connected to the working channel 27, which, depending on the position of the spool communicates with the drain line by means of radial channels 28 formed in the right of spool 10 or sk with mezhpo Skov chamber 25.

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Thus, the working stroke chamber 17 with the pressure line through the working channel 27, the interpass chamber 25, the pressure channel 26 and the idling chamber 16. Since the working area of the chamber 17 is several times larger than the working area of the camera 16, a force is applied to the piston-fighter towards the tool, which first brakes the piston-striker and then moves it to the left (to the tool) with positive acceleration, those. makes a working move. At the end of the working stroke, i.e. directly

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The housing 8 of each hydraulic percussion device is made with an additional ratchet 29, forming the brake chamber 30 with the piston-striker 9, and the piston-striker 9 with the throttle channel 31 communicated with the brake chamber 30, which is arranged to communicate with the working chamber. (

In the absence of contact of the tool with the bottom (top device in FIG. 2), the tool 6 and the piston head 9 are in the leftmost position, in which the brake chamber 30 is isolated from the pressure line 13 and connected through the throttle channel 31 to the working chamber 17 and under the action of a load (lower device in Fig. 2) the tool is shifted to the extreme right position, and the firing piston is in the working position, in which the idle speed chamber 16, communicated by the pressure line 13, communicates with the brake chamber 30. When fluid is supplied under pressure in the pressure line of the piston head of the upper percussion device remains

in the left position, and the piston head of the lower percussion device under

The liquid entering the chamber 16 is idled by moving the fluid to the right, 5 displacing the fluid from the chamber 17 of the stroke into the drain line and moving the spool 10 in the right position. At the end of the movement of the piston-block 9 to the right, an annular groove 20 connects the control channel 21 with the idling chamber 16 and the pressure line 13, as a result of which the liquid enters the control chamber 18, the cross section of which is more effective than the cross section of the interstitial chamber 25 , and moves zone 10 to the right position, connect

Thus, the working stroke chamber 17 with the pressure line through the working channel 27, the interpass chamber 25, the pressure channel 26 and the idling chamber 16. Since the working area of the chamber 17 is several times larger than the working area of the camera 16, a force is applied to the piston-fighter towards the tool, which first brakes the piston-striker and then moves it to the left (to the tool) with positive acceleration, those. makes a working move. At the end of the working stroke, i.e. directly

before a piston-b) collision, with an instrument, an annular groove 20 connects the control channel 19 with a channel 21 permanently connected to the drain line.

As a result, the valve 10 under the action of high pressure in the interpass chamber 25 moves to the left position, thereby disconnecting the idle and working chambers and connecting the chamber 17 to the drain line 14, therefore, after a collision with the piston firing tool in the idling chamber, it moves to the right, making the following idle, i.e. the cycle repeats.

The system works as follows.

When the pump 1 is turned on under the action of its spring, the piston 2 is in the extreme right position and the pressure slide valve 4 is in the extreme left position, therefore the pump provides the maximum flow by quickly raising the pressure in the hydraulic line of the hydraulic system. After the fluid pressure reaches a value corresponding to the setting of the spring 5, the pressure slide 4 moves to the right, connecting the piston chamber 3 of the regulator to the pressure line, causing the piston to move to the left, reducing the pump to a value that maintains the nominal pressure of the fluid in the system.

An increase or decrease in the number of simultaneously operating percussion devices due to

changes in the external load on the tools, causes a corresponding discrepancy (difference) between the actual and required pump flow, which leads to a decrease or increase in pressure compared to the nominal pressure taken by the slide valve, respectively

and the right position and connecting the chamber 3 of the pistons with a drain or with the pressure of the hydraulic system, and the piston, shifting to the right or left, increases or decreases the pump flow in accordance with the error sign, bringing the magnitude of this error to zero.

Claims (1)

Invention Formula Hydraulic shock system of the mining machine, including hydraulic connected in parallel to the pressure line of the hydraulic pump. percussion devices, each of which has a firing piston, formed with an idle and working chamber casing, a control spool and an instrument, that, in order to increase the reliability of the machine by eliminating the work of the percussion device with the loss of its tool’s contact with the face, the casing of each hydraulic percussion device is completed with an additional bore that forms the brake chamber with the piston-brisk, and a brake chamber with a throttle channel arranged to communicate with the working stroke chamber. //. /; 62S / J28torn 27 fU J /