Birotating tunnel shield unit

FIELD: mining.

SUBSTANCE: birotating tunnel shield unit consists of three sections. Two front sections, starting from bottomhole, are mounted on diaphragm by means of ball runnings with toothed collars of conical gear, engaged at diametral opposite sides with master conical gears of section rotation drives arranged on diaphragm, which is mounted at front end of beam with drive by means of Hooke joint and hydraulic cylinders with stems, fixed on beam and diaphragm by means of journals. Beam with drive is mounted in guides of back section, at the same time auger with a separate drive is mounted inside beam. On external surface of back section there are elements of conrotation arranged in the form of plates aligned along longitudinal axis of section, at the same time on external surfaces of front rotary sections there are helical blades arranged with opposite direction of winding. Besides, small actuating elements with individual drives and sleeves with augers are mounted upstream each blade and element of conrotation. Hollow beam is mounted in the centre of diaphragm, inside which there is an auger with drive fixed, at the same time outside - at bottomhole of beam there is a socket and loading rotor with drive mounted, connected to the main actuating element.

EFFECT: unloading of back section from torque and from longitudinal braking force.

6 dwg

 

The invention relates to the mining industry and can be used when carrying out excavations, tunnels, construction of mining facilities, rescue, exploration and other works.

Known tunneling shield Assembly including an Executive body, the shell and the mechanism of movement in the form of a tubular spiral on the outer surface of the shell, inside of which is fixed to the cylinders of the jacks, and outside of the spiral, the rods of jacks - bearing skis, downhole turn of the spiral is the Executive body (A.S. USSR SU # 1008458 from 05.08.1981; authors: Gorbunov V.F., eller A.F., mountainous EAST, Aksenov V.).

The disadvantage of this unit is:

- dissociation of operations development of the face and shifting, which reduces performance;

- high torque generated by the hydraulic jacks, includes heavy construction and excavation contour, causing the rock and jamming of the shell.

Known tunneling shield Assembly, taken as a prototype for tunneling, mining excavation and tunneling structures (A.S. USSR SU # 1647144 from 05.03.1986; authors: Vphurynv, Afellay, Aladejana, CEO and Wednesady), combining in-time processes:

- destruction of the face;

- transportation of the separated rock mass from slaughter and

- p is Emesene unit in the direction of the face.

The unit consists of a cylindrical shell formed by the annular sections, mating with the possibility of relative rotation through zivotnogo mechanism. The front section (the first, counting from the bottom) provided by the Executive body with the drive and loading the rotor with a conveying screw, and the outer surface of the helical blade, the second rear - has on the outer surface of the supporting elements made in the form of plates, oriented along the longitudinal axis of the Assembly.

The disadvantage of this unit is high torque (hundreds TCm), acting between sections and causing additional longitudinal braking force, the friction on the supporting elements of counter-rotating, reaching values of 100 TC and more.

The objective of the invention is: unloading the rear section of the torque and the longitudinal braking effort.

For this birotational tunneling shield Assembly (hereinafter referred to birotational unit) is composed of three sections (figure 1), arranged one after the other. Two front sections, starting from the bottom, mounted on the diaphragm by means of ball chasing. Ball shoulder straps made integral with a toothed crowns bevel gear (ring gear and ball ring combined; 2; 3). The diaphragm is mounted a rotational drive partitions. The vents the ball straps are in engagement with diametrically opposite sides with a leading bevel gears drives the rotation of the sections, located on the diaphragm.

Aperture with sections mounted on the front end of the beam by means of hinge gook. On the beam trunnions secured four cylinder with rods. Cylinder rods by pins fixed to the diaphragm. Two cylinders attached at diametrically opposite points in the vertical plane, two in the horizontal. The axis of the diaphragm is the axis of rotation of the sections and the axis of the imminent sinking.

Beam its rear end mounted in the guide rails of the rear section (figure 4), preventing its rotation, but permitting its movement along the axis of the rear section (axis already made penetrations).

The beam has an actuator associated with the rotational drive partitions. Beam is simultaneously the tray, which is transporting auger with drive.

On the outer surface of the rear section of the installed elements of counter-rotating plates, oriented along the axis of the section.

On the outer surfaces of the front rotating sections of the spiral blades with a counter direction of winding.

Before the screw blades and the elements mounted counter-rotating small Executive bodies with the drives.

In the center of the diaphragm is rigidly fixed to the hollow beam, inside screw with the drive.

On the front (face) of the end of the hollow beams is the bell, pogruzoch the initial rotor blades. At the bottom of the cone rotor has openings G, located against sleeve small Executive bodies. The rotor is mounted on the beam in front of the socket and provided with a drive connected with the main Executive body. This actuator is connected with the frontal cone, which is part of the main Executive body.

Description birotational tunneling panel Assembly is illustrated by drawings:

1 shows a General view of birotational Assembly;

figure 2 - cross section a-a in figure 1;

figure 3 - the place I and the species In figure 1;

figure 4 - section d-D in figure 1;

figure 5 - cross-section B-B in figure 1.

Birotational unit consists of three sections, arranged one after the other (figure 1). Two front sections 1 and 2, counting from the bottom, mounted on the diaphragm 3 by means of ball chasing 4 with toothed crowns 5. Sprockets 5 are in engagement with the leading bevel gear 6 drives 7 rotation of the sections 1 and 2 (2; 3). As the sprockets 5 are in engagement with diametrically opposite sides with top bevel gear 6 drives 7 rotation of the sections 1 and 2, located on the diaphragm 3 (figure 3), they passed a toothed crowns 5 together with sections 1 and 2 rotate in opposite directions. Hence the name - birotational.

Aperture 3 with sections 1 and 2 is mounted on the front end of the beam 8 by what redstem hinge gook 9. This allows the diaphragm 3 to swing in a horizontal (yaw) and vertical (pitch) planes. For this purpose, the beam 8 by pins fixed four cylinder 10. Cylinder rods 10 by pins fixed to the diaphragm 3. Two cylinder 10 turn (reject) the aperture 3 in the vertical plane, two in the horizontal. Hinged aperture 3 with sections 1 and 2 gives you the ability to maneuver birotational unit in a mountain massif on the course and depth, because the axis of rotation of the sections 1 and 2 is the axis of the imminent sinking.

Beam 8 with its rear end mounted in the guides 11 of the rear section 12 (4), preventing its rotation, but permitting its movement by the actuator 13 along the axis of the rear section 12 (axis already made penetrations).

Beam 8 can be extended from the rear section 12 synchronously with the rotation of the front section by means of the kinematic (or electrical) communication with the actuator 7 of their rotation or asynchronously (independently) from their rotation (depending on the phase of the business cycle). Beam 8 is also a tray that is transporting the auger 14 to the actuator 15 for transporting the separated rock mass from the bottom.

On the outer surface of the rear section 12 is rigidly fixed to the elements of counter-rotating 16 in the form of plates, oriented along the axis of the rear section 12. On the outer surface the parts of the front, rotating in opposite directions sections 1 and 2 rigidly fixed helical blades 17, the direction of winding of which is such that during rotation of the sections 1 and 2 they are interacting with the mountain, creating traction on the bottom.

Before the helical blades 17 and the elements of counter-rotating 16 mounted small Executive bodies 18 actuators 19, forming mountain massif screw channels of the blades 17 of the front rotating sections 1 and 2 and direct - to elements of counter-rotating 16 of the rear section 12.

In the center of the diaphragm 3 is mounted a hollow beam 20 (1; 5)inside of the screw 21 to the actuator 22 for transporting the separated rock mass from slaughter in beam 8 of the rear section 12 to the panel 14 with the actuator 15 for further promotion of the detached rock mass.

On the front (downhole) end of the beam 20 is mounted socket 23 for receiving the rock mass and loading the rotor 24 with the blades 25. The rotor 24 is driven by the actuator 26 mounted on the beam 20 in front of the socket 23. The actuator 26 is connected to the main Executive body 27, providing its rotation around the axis of the beam 20 (movement) and around its own axis (cutting motion). This drive rotates a frontal cone related to the main Executive body 27.

Mountain mass, separated the main Executive body 27 with its shares is Oh and the small Executive bodies 18 of the first section 1, removed the blades 25 of the loading of the rotor 24, and the second and rear sections on the sleeves 28 and screws 29, United with their actuators 30. The rock mass from small Executive bodies 18 of the front section enters the rotor through the holes,

Birotational unit operates as follows.

The unit is delivered on a prepared platform and powered by electricity. The pad can be horizontal or inclined towards the bottom on the calculated angle. The entire work cycle is divided into five phases. In the initial position of the beam 8 is drawn into the section 12 is in its rearmost position).

In the first phase include those Executive bodies, which perform the following operations:

the main Executive body 27 with the frontal cone destroy the bottom, rotating drive 26 around its own axis and around the axis of the beam 20. Work is being done on lower modes due to the large unbalanced moments;

- separated the rock mass is showered down on the rotor 24, raised his blades 25 up and when they reach angle greater than the angle of friction, sliding into the socket 23 (figure 5), where the screw 21 is rotated by the actuator 22, advances in beam 8, and then screw 14 with the actuator 15 is sent to the rear section 12 for further transportation;

Executive bodies 18 of the front section 1 is formed in the rock mass screw channel is for helical blades 17, and separated them mountain mass, interacting with screws 29, the rotating actuator 30 Executive bodies 18, moves the sleeve 28 to the rotor 24, enters into it through the holes G, then on the blades 25 in the socket 23 and further separated with the main mass - transport stream;

- the front section 1 of the actuator 7 is rotated synchronously with extension beams 8 under the action of the actuator 13 of the guides 11 of the rear section 12. Synchronization is necessary in this phase to start cutting helical channels with a pitch of the helical surface, equal step helical blades 17. The timing circuit may be any electric system (the "electric shaft"), mechanical, electronic or other;

section 2 rotates at idle, it drives 19 small Executive bodies 18 and the actuators 30 of the screw 29 is turned off.

The first phase ends when the front section 1 will crash into a mountain range over the whole length.

In the second phase all units of sections 1 and 2, and the rotation of the sections 1 and 2 is stopped. Work small Executive bodies 18 to the actuators 19 of the rear section 12. They cut direct channels to elements of counter-rotating 16. The pressure force on the bottom creates the actuator 13, which draws the beam 8 along the guide rails 11 in section 12 - tightens the rear section. Beam 8 transmits the force through the axis of the hinge gook 9 on the diaphragm 3, then through the ball of the howling shoulder strap 4 with a ring gear 5 of the front section 1, rigidly attached to the ring section 1, on the helical blade 17 and the screw channels of the rocks.

The second phase ends when the beam 8 will take the original rearmost position in the guide 11.

The third phase is similar to the first with the difference that join small Executive bodies 18 both front sections 1 and 2 to the actuators 19 and screws 29 to the actuators 30;

beam 8 synchronously with the rotating sections 1 and 2 out of the section 12. The modes can be increased, since the torque of sections 1 and 2 are mutually balanced;

Executive bodies of the 18 sections 1 and 2 form in the rock mass screw channels for screw blades 17 of both sections;

- mountain mass, separated by the Executive bodies of 18, served in the sleeve 28 and screws 29, which are rotated by the actuator 30, advances in beam 8, where the auger 14 is pushed in the rear section 12 for further transportation.

The third phase ends when the section 2 will crash into a mountain range the whole length (full travel of the beam 8).

The fourth phase is completely identical to the second beam 8 is drawn into the rear section 12, does not extend to the rearmost position by an amount of 60...100 mm, allowing to reject sections 1 and 2 for manoeuvre at the rate and pitch, avoiding the stop section 2 section 12.

The fifth phase is the main one. This work is in the normal mode of all staff and the Executive bodies (the main 27 with the frontal cone and small Executive bodies 18) all three sections: 1, 2 and 12. Synchronization is disabled, because the beam 8 is stationary (relative to section 12), and step screw channels will be given step of the blades 17, which will be based on previously executed screw channels in increments of step spiral blade surfaces. All birotational unit will move due to the interaction of a rotating helical blades 17 with helical channels formed small Executive bodies 18 in the mountain (as the screws of ships or aircraft propellers). Torque friction and cutting forces perceived by sections 1 and 2 will be almost balanced. The difference will be due to anisotropicly of rock and effort on the main Executive body 27, where torque frontal cone and the Executive body of the drum is difficult to balance. Are all screws (14, 21 and 29), promoting a detached rock mass. In this mode, the shield, the unit operates to output the calculated coordinates of the rocks.

Thus, the use of two counter-rotating sections in the downhole portion birotational tunneling panel unit generates two mutually balancing point (or largely compensated)that unloads the rear section of the torque and the longitudinal braking forces generated by the elements of counter-rotating vsledstvii the response.

As a side effect: birotational tunneling shield unit of the claimed design easier prototype 10...12% and saves up to 30% of energy on the primary process.

Birotational tunneling shield Assembly consists of three sections: two front, starting from the bottom, mounted on the diaphragm by means of ball chasing serrated crowns bevel gear being in engagement with diametrically opposite sides with a leading bevel gears drives the rotation of the sections located on the diaphragm, which is mounted on the front end of the beam with drive through hinge gook, and cylinders with rods, mounted on the beam and the diaphragm by means of pins, and a beam with actuator mounted in the guide rails of the rear section, while the inside beams mounted auger with a separate drive, and on the outer surface of the rear section are elements of counter-rotating, made in the form of plates, oriented along the longitudinal axis of the section, the outer surfaces of the front rotating sections are helical blade with a counter direction of winding, and small Executive authorities with an individual actuators and sleeves with screws mounted in front of each blade and an element of counter-rotating, and in the center of the diaphragm is mounted hollow b is the left main coronary artery within which is mounted the screw with the drive, while outside on the downhole end of the beam mounted socket and loading the rotor with the drive connected to the main Executive body.



 

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