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.

 

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