Bidirectional alternative integral sealing device for main drive of tunnel boring machine

Abstract

The invention discloses a bidirectional alternative integral sealing device for main drive of a tunnel boring machine. The device comprises a boring machine adapter flange, a boring machine supportingring and an integral seal. A positioning ring is arranged outside the boring machine supporting ring. The integral seal comprises a base body, three sealing rings and a detection ring. The cross section of the base body is of an L-shaped structure, the tail end of the radial part is provided with a hydrophobic layer, and the tail end of the axial part is provided with a positioning hook; the outer part of each sealing ring is annular, the inner part of each sealing ring is a U-shaped labyrinth ring cavity, each sealing ring is provided with a first outer framework, a first inner shell, a first limiting block, a second limiting block, an axial seal, a first radial seal and a second radial seal, the outer part of the detection ring is annular, the inner part of the detection ring is a U-shaped labyrinth ring cavity, and the detection ring is provided with a second outer framework, a second inner shell, a third limiting block, a fourth limiting block and a third radial seal. The base body hydrophobic layer, the axial seals, the radial seals and the labyrinth ring cavities are integrated, meanwhile, sealing grease is injected, and the device has the advantages of good sealing performance, long service life, small disassembly and assembly difficulty, low maintenance cost and the like.

Description

technical field [0001] The invention belongs to the technical field of tunnel boring machine engineering, and in particular relates to a two-way alternating integral sealing device for the main drive of the tunnel boring machine. Background technique [0002] Tunnel boring machine, as a high-end intelligent equipment integrating technologies in various fields such as mechanics, electricity, hydraulics, information, measurement, and control, has played a pivotal role in tunnel projects such as subways, railways, electric power, and water conservancy. The main drive system is one of the core components of the roadheader, which is used to drive the cutter head to rotate, and then excavate the soil (rock) body. The main drive seal is used to prevent external sediment from entering the gearbox and avoid gear oil leakage, and is an important part to ensure the normal operation of the main drive. [0003] At present, the main drive seal is mainly composed of multiple lip seals. Du...

AI Technical Summary

Problems solved by technology

If the amount of grease injection is insufficient and the grease pressure is too small, the ability to block the external sediment will be reduced, and at the same time, the lip seal will be insufficiently lubricated, resulting in dry grinding of the sealing lip, further aggravating seal wear

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