Seal assembly rotary tunneling machine
(57) Abstract:The invention relates to underground construction and can be used in the construction of tunnels. Object of the invention is improving the reliability and increasing the unification of the elements of the sealing unit. Seal Assembly rotary tunneling machine includes a Central seal located between the rotor and the stationary shaft fixed in the Central part of the partition body shield, and peripheral seal. The Central seal is made in the form of a group of profiled rings V-shaped profile with a divergent outer tabs in the slots of the stationary shaft or rotor with the possibility of the elastic interaction of the protrusions with a fixed shaft and rotor. The peripheral seal is located between the rotor and the wall of the housing of the shield and is made of rows of profiled rings comprising at least two elements. One of them is made with a hook located in the slot of the rotor or partitions of the body of the shield, and with a sloped wedge-shaped protrusion that interacts with the sealing surface. Another fixing, made in the form of V-shaped profile with a parting in the Stour is then a composite profile of the ring in the groove. 6 Il. The invention relates to the field of underground construction, namely, the tunneling shields, equipped with a rotary tool, and can be used in the construction of tunnels.Known design rotary tunneling machine in which to protect the bearings and power transmission parts of the rotor is used sealing unit made in the form of profiled rings of elastic material (RF patent 2002056, CL E 21 D 9/06, from 22.10.90 year).The disadvantage of this sealing unit is the design complexity due to the need for fasteners on each sealing diameter profiled rings for fixation are not used its own elastic properties of the elastic material profile rings.The closest technical solution of the essential features is the seal node rotary tunneling machine, made in the form of profiled rings of elastic material, which interacts with the sealing surface and located in the grooves between the fixed and movable parts (European patent 0122540, CL E 21 D 9/06, from 14.04.83 year).The disadvantage of sealing unit of this design is of large diameter, where there is a significant gap between the movable and stationary parts of the tunnel shield, and, moreover, he does not have the necessary degree of commonality when used in Central and peripheral seals rotary tunneling machine.Task to be solved by the claimed invention is directed, is to improve the operational reliability of the seals, as well as to improve the degree of unification of the elements of the sealing unit.To solve the problem in o node rotary tunneling machine, comprising a Central seal located between the rotor and the stationary shaft fixed in the Central part of the partition body shield, and a peripheral seal, the Central seal is made in the form of a group of profiled rings V-shaped profile with a divergent outer tabs in the slots of the stationary shaft or rotor with the possibility of the elastic interaction of the protrusions with a fixed shaft and a rotor, and a peripheral seal is located between the rotor and the wall of the housing of the shield and is made of rows of profiled rings comprising at least two elements, one of which is executed with the Zats is adequate with the sealing surface, and the other, the retainer, in the form of a V-shaped profile with a divergent outer protrusions with the possibility of the elastic interaction of the projections on the walls of the first elements and fixing composite core ring in a groove.In Fig. 1 presents a General view of the rotary tunneling machine o node; Fig.2 - callout a in Fig.1; Fig.3 - V-shaped profile pixelwise-sealing element of Fig.4-6 - embodiments of the composite profiled rings.Seal Assembly is placed in a rotary tunnel shield, comprising a housing 1, the plate cylinders 2, the rotor 3 with the cutting tool 4. The body 1 is provided with a partition wall 5, which is located inside the housing, which holds the rotating mechanism 6 driven rotation 7 of the rotor 3. In the Central part of the partition wall 5 fixed fixed shaft 8 pipelines of water supply 9 and pumping the slurry 10. Between the wall 5 of the housing of the shield and the rotor 3 is peripheral seal 11, and between the fixed shaft 8 and the rotor 3 is a Central seal 12. Peripheral seal 11 is made of rows of profiled rings comprising at least two elements, one is made in the form of a profile with 13 located in the groove 14 by the hook 15 yasnih protrusions 16 more than the value of the gap between the partition 5 and the rotor 3, another element, retainer, in the form of a V-shaped profile 17 with divergent outer tabs 18. Central seal 12 is the number located in the grooves 19 of profiled rings in the form of the same V-shaped profile 17 with divergent outer tabs 18, which interacts with the sealing surface.Seal Assembly protects the rotary mechanism 6 drives rotation 7 of the rotor 3 from the ingress of dust, water, etc. during the excavation cutting tool 4, the water supply pipe 9, the pumping slurry through the pipeline 10 and the movement of the shield cylinder 2. Profiled rings peripheral and Central seals can be accommodated in the grooves on the fixed and movable surfaces, sealing the gaps in the radial and/or edge directions.Assembly of the sealing unit is as follows.The elements of the peripheral seal 11 is installed in the groove 14 and fixed V-shaped profile 17 on the versions shown in Fig.4-6, however at the expense of a hook 15 and the elasticity of the projections 18 is provided by fixing a composite profile of the ring in the groove 14. Parts of the Central seal in the form of a V-shaped profile is mportant shaft 8.This design of the sealing unit allows to increase reliability, simplify fabrication, erection and to improve maintainability rotary tunneling shields at the expense of the protection of the gaps between the fixed and movable parts in a wide range of sealing diameters unified elements of elastic material, for example polyurethane, by selecting the required rigidity of the seals on the different variants. Seal Assembly rotary tunneling machine, comprising a Central seal located between the rotor and the stationary shaft fixed in the Central part of the partition body shield, and a peripheral seal, wherein the Central seal is made in the form of a group of profiled rings V-shaped profile with a divergent outer tabs in the slots of the stationary shaft or rotor with the possibility of the elastic interaction of the protrusions with a fixed shaft and a rotor, and a peripheral seal is located between the rotor and the wall of the housing of the shield and is made of rows of profiled rings comprising at least two elements, one of which is executed with a hook, is the applied surface, and the other, the retainer, in the form of a V-shaped profile with a divergent outer protrusions with the possibility of the elastic interaction of the projections on the walls of the first elements and fixing composite core ring in the groove.
FIELD: mining industry.
SUBSTANCE: device has frontal, two side and two conical working tools with rock-destroying tools on outer surfaces, drives, rigidly connected to axes of each working tool, and displacement mechanism, connected to guides, placed at angle relatively to each other, which angle is determined from mathematical expression. Frontal and each of side working tools are made in form of two rotation bodies, having arced forming lines with given value of convexity. Axes of frontal working tool and axes of two conical working tools are rigidly connected to guides, axes of upper rotation body of frontal working tool being displaced relatively to axis of its lower rotation body towards pit-face, and axes of each pair of side working tools are jointly connected to each other and to guides. Frontal working tool may be made in form of several modules.
EFFECT: higher efficiency.
2 cl, 4 dwg
FIELD: underground structure building, particularly for forming underground tunnels and collectors.
SUBSTANCE: method involves excavating ground with cutting tool; regulating kentledge pressure in rotor chamber and backfilling annular tubing space. Kentledge pressure is automatically adjusting with that of enclosing ground exerting pressure on shield case by means of membranes. The membranes are installed in shield case and are permanently subjected to actual enclosing ground pressure. Backfilling operation is performed through end part of shield case immediately after shield case movement.
EFFECT: prevention of ground and object deformation in tunnel boring machine movement area, increased backfill layer elasticity and tunnel lining impermeability.
4 cl, 6 dwg
FIELD: tunnel construction, particularly devices to construct hydroelectric power plant floodgates and to build motor roads and rail roads in mountains.
SUBSTANCE: method involves creating conditions favorable for chemical reaction between chemical element oxides basically constituting rock and graphite for rock fusion. For this rock is heated up to high temperature at face by thermal electric arc energy transmission through metal front tunneling machine wall. Electric arc is generated between electrodes inside discharge chambers arranged on inner surface of front tunneling machine wall. Electric current is supplied to electrodes via graphite mass moving through electrically-insulated pipes. Graphite is forced via electrodes and introduced into face through nozzles connected to front tunneling machine wall.
EFFECT: possibility to regulate electric current power and graphite mass to select necessary excavation regimes.
SUBSTANCE: method of boring hard rock by means of tunnel boring machine equipped with disks of hardened steel projecting from cutting head consists in supply of foamed water liquid to cutting head; this composition corresponds to surface active substance -SAS and lubricating material - polyethylene oxide with molecular wt from 4.500.000 to 8.000.000. The said ingredients are measured separately in a water form, are added into water and are transformed into a foam using anionic or nonionic SAS; the said composition is obtained by dilution of concentrate with water on site.
EFFECT: reduced wear of cutting components; increased boring efficiency.
SUBSTANCE: invention is related to mining, in particular to mechanised performance of underground mine tunnels with round shape of cross section. Method for performance of underground mine tunnel of round cross section includes formation of oriented cavity in the Earth bowels, cutting of helical and longitudinal radial channels in edge zone of tunnel in surrounding rock mass, loading and transportation of broken muck, maintenance of stripped area by erection of support and organization of ventilation. Together with cavity formation they cut three longitudinal radial channels, evenly distributing them in plane of tunnel cross section. At the same time one of longitudinal radial channels is oriented along line of most probable largest action of external load from forces of rock pressure. Damaged rock is removed from longitudinal radial channels and loaded in transport vehicle. In longitudinal radial channels they install embedded elements, to which support elements are connected. Besides depth of longitudinal radial channel makes at least half of radius of cross section of produced tunnel.
EFFECT: higher reliability of mine tunnel maintenance in operational period.
SUBSTANCE: invention is related to mining industry, in particular to shield driving of tunnels, and may be used in shield driving of through collector tunnels with concrete lining. Method for shield driving of tunnel consists in erection of shield chambers by method of "slurry-type wall" for assembly and turns of shield on track of arranged tunnel. Walls of shield chambers, at least those, where holes are provided for passage of shield, are made of concrete, having compression strength of not more than 11.5-14.5 MPa, are reinforced with glass-plastic reinforcement from rods with diametre from 4 to 10 mm with ultimate strength in case of cutting across fibres of at least 165 MPa and developed by working element of shield. Formation of concrete lining, in process of collector tunnel driving, at least in joint of shield chambers walls and on length of tunnel from two to ten of its diametres, is carried out by at least two concentric layers, between which additional internal hydraulic insulation layer is arranged, and application of hydraulic insulation coating onto inner surface of concrete lining is carried out after complete drying of surface layer of tunnel walls.
EFFECT: improved reliability of tunnel arrangement and its hydraulic insulation, higher speed of underground communications construction.
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.
SUBSTANCE: tunnelling header unit comprises serially arranged head and tail sections. The head section comprises a helical blade on the external surface, an actuator and an auger mechanism for broken mass discharge, besides, a rotation mechanism is also located in the head section. The tail section comprises longitudinal support elements, aligned along the longitudinal axis of the unit, a drive of the rotation mechanism. The sections are connected to each other with the possibility of the head section rotation relatively to its longitudinal axis. The rotation mechanism is arranged in the form of a hollow shaft, where two wave generators are installed, being arranged with eccentricity relative to the axis of the driving shaft, a geared crown arranged on the inner surface of the head section, a separator connected to the end section and intermediate solids of revolution. Number of teeth in the geared crown is more than the number of intermediate solids of revolution by one. The sections have a rigid kinematic link in the axial direction, which consists of two touching circular ledges, one ledge is located on the separator, the second ledge is arranged on the inner surface of the head section. The driving shaft is installed in rolling bearings, with one bearing installed in the head section, and the other one - in the end section. The driving shaft at the side of the stripped area has a driving gear arranged with the possibility of rotation from motors via a motor gear, and the motors are fixed at the inner surface of the end section.
EFFECT: improved reliability of the unit operation, loading capacity of the unit drive and efficiency of tunnelling, expanded area of the unit application.
SUBSTANCE: tunnelling combine (90) for horizontal mines comprises a rotary cutting head (93), where there are many cutting assemblies (10) installed as capable of rotation. Multiple units of instruments (50) are connected with a rotary cutting head, at the same time each unit of instruments comprises a distal end in contact with the appropriate cutting assembly. Units of instruments comprise multiple sensors, including an accelerometer (32), a magnetometer (33) and a temperature sensor (34) to monitor the appropriate cutting assembly. Sensors are installed at the remote end of units of instruments pressed for contact with a cutting assembly. Units of instruments comprise a wireless transceiver and are connected to each other into a circuit of data transfer or a peer-to-peer network. A source (176) of power supply, such as a battery pack, is provided for each unit of instruments. Sensor data may be used to control operation of a tunnelling combine for horizontal mines and/or for monitoring condition of cutting assemblies.
EFFECT: enhancing effectiveness and reliability of tunnelling operation.
27 cl, 7 dwg
SUBSTANCE: duplex geovehicle consists of three sections. Two front sections are mounted on load-carrying beams with drives by means of ball races with toothed rims of bevel gear. Section rotation drives are located on diaphragms that are mounted on front ends of load-carrying beams with drives. Each load-carrying beam with a drive is mounted in the guides of rear section with possibility of its retraction. A screw with a separate drive is mounted inside the load-carrying beam. On external surfaces of front rotating sections there located are screw blades with opposite winding direction. Before each blade there mounted are small actuating elements with individual drives and sleeves with screws. In the centre of diaphragms there mounted are hollow beams inside which screws with drives are mounted Flared ends and loading rotors with drives are mounted on the front side of face ends of hollow beams. Drives and actuating elements of rear section are located on its front wall. Outside the front wall: at the top and at the bottom - horizontally, and in the centre - vertically. Drag conveyor, tray and screw with a drive are located behind the front wall inside rear section.
EFFECT: increasing the strength of out-contour layer of rock mass.