SU1435776A1 - Hydraulically-driven rotative-percussive drilling machine - Google Patents

Abstract

The invention relates to the mining industry. The purpose of the inventions is to increase the productivity of the machine by providing an automatic redistribution of power between the rotator and the impact mechanism when the properties of the drilled rock change. The machine contains a uniaxial oil station with a drain 2 and a pressure 3 lines. By / m

Description

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It is associated with the pressure cavity of the hydraulic motor (DG) 6 of the rotator drive and with the impact mechanism 8 having the piston stroke regulator 9 of the impactor 10 with the control chamber 11. The machine has a pressure divider, made in the form of two throttles 12 and J3, which connect the chamber 11 respectively with the pressure cavity DG 6 and line 2. To match the characteristics of the regulator 9 with the characteristics DG 6 and mechanism 8, a pressure divider is introduced. Depending on the degree of opening of the throttles from one hydroline to another, either full pressure or some part of it enters. By adjusting the throttles 13, an optimum ratio of the powers of the rotator and mechanism 8 is achieved for a certain average rock. 1 il.

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The invention relates to the mining industry, namely to hydraulic drilling machines with shock power control: and torque.

The purpose of the invention is to increase the productivity of the machine by providing automatic power redistribution between the rotator and the percussion mechanism when the properties of the drilled rock are changed.

. The drawing shows a schematic diagram of the device.

The hydraulic driller of percussive-rotary action contains a single-pump oil station with pump 1, a drain line; 2 and a pressure line 3 connected by a rez. the distributor 4 by hydroline 5 with the pressure cavity of the rotary actuator hydraulic motor 6 and through the distributor 7 with the impact mechanism 8 having the piston stroke regulator 9 of the impactor 10 with the control chamber 11,

The machine is equipped with a pressure divider, made in the form of douh throttles 12 and 13, connecting the chamber AND control of the piston-hammer regulator 9 through the hydraulic line 4, respectively, to the pressure cavity of the rotational drive hydraulic hydraulics 6 and drain line 2. The pressure main 3 has a safety valve 15 The drilling machine has a tool 16. The choke 13 is adjustable.

Drilling machine works as follows.

When the oil pump 1 is operating, the pressure in the system is determined by the load on

the hydraulic motor 6 of the rotator, and the distribution of the working fluid flows to the hydraulic motor 6 and the shock mechanism 8 is determined by the dynamic resistance of the shock mechanism 8, which in turn depends on the setting of the stroke length of the impactor piston 10,

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With a constant value of the stroke of the impactor piston, an increase in the load on the rotator, which occurs when drilling weak rocks, leads to noBbirje pressure in the system and, as a result, to an increase in the frequency of shocks and the impact power of the impact mechanism. At the same time, the frequency of rotation of the tool drops, as the flow of fluid into the impact mechanism increases. Such a distribution of the flow fluid impairs the characteristics of the drilling machine. In order to correct the characteristics of the boring machine, feedback on the pressure in the system, acting on the controller 9 of the stroke length of the impactor piston, is introduced,

With increasing pressure in the system under the action of the regulator 9, the stroke length of the impactor piston decreases, and the dynamic resistance to the flow of working fluid in the percussion mechanism increases and the fluid enters more in the hydraulic motor 6 of the rotator. Thus, when a tool hits a weak rock, the frequency of rotation of the tool increases and the impact energy of the tool 16 decreases and the impact power of the impact mechanism 8 decreases.

A pressure divider is introduced to match the characteristics of the regulator 9 with the characteristics of the hydraulic engine 6 and the percussion mechanism 8. Depending on the degree of opening throttling 13

in hydroline. 14 comes from the hydroline 5 or the full pressure of the fluid, or some of it. By adjusting the throttles 13, an optimum -QQ piston stroke regulator is achieved.

power ratio of the rotator

: and percussion mechanism for some

middle breed When changing properties

rocks power ratio varies v

automatically. 15

control measure, which, in order to ensure the performance of the machine to ensure automatic power transfer between the rotating and the percussion mechanism when changing the properties of the drilled rock, it is a pressure divider made by two two chokes connecting the control of the stroke adjuster n-striker, respectively, on the cavity of the hydraulic motor drive bodies and drain line.

The rotation of the rotator motor is accomplished by switching on the distributor 4, and the start of the impact mechanism is performed by the distributor 7. The safety valve 15 limits the maximum pressure in the system.

Claims (1)

Invention Formula A hydraulic drilling machine of a rotary percussion action, comprising a single-pump oil station with a drain line and a pressure line connected to the pressure cavity of the rotator drive hydraulic motor and with a hammer mechanism having with karegul torr stroke piston control measure, in order to increase machine performance by providing automatic power redistribution between the rotator and the impact mechanism when changing the properties of the drilled rock, it is equipped with a pressure divider made in the form of two throttles connecting the piston control knob control chamber -strike, respectively, with the pressure cavity of the hydraulic motor drive rotator and drain line.