Bidirectional Alternating Integral Sealing Device for Tunnel Boring Machine Main Drive

Abstract

The invention discloses a bidirectional alternate integral sealing device used for the main drive of a tunnel boring machine, which comprises a tunnel boring machine adapter flange, a boring machine support ring and an integral seal. A positioning ring is installed on the outside of the support ring of the roadheader. The integral seal includes the base body, 3 sealing rings and 1 detection ring. The cross section of the base body has an L-shaped structure, the end of the radial part is incorporated into the hydrophobic layer, and the end of the axial part is provided with a positioning hook; the outer part of the sealing ring is annular, and the inner part is a U-shaped labyrinth ring cavity, which is equipped with a first outer skeleton, a first inner The casing, the first limit block, the second limit block, the axial seal, the first radial seal and the second radial seal. The outer frame, the second inner shell, the third limit block, the fourth limit block and the third radial seal. The invention integrates the base hydrophobic layer, the axial seal, the radial seal and the labyrinth ring cavity into one body, combined with the injection of sealing grease, and has the advantages of good sealing performance, long service life, less difficulty in disassembly and assembly, and low maintenance cost.

Description

technical field [0001] The invention belongs to the technical field of tunnel boring machine engineering, and in particular relates to a bidirectional alternating integral sealing device used for the main drive of the tunnel boring machine. Background technique [0002] Tunnel boring machine, as a high-end intelligent equipment integrating mechanical, electrical, hydraulic, information, measurement, control and other technologies, 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). The main drive seal is used to prevent external sediment from entering the gearbox and avoid gear oil leakage, and is an important component to ensure the normal operation of the main drive. [0003] At present, the main drive seal is mainly composed of multiple lip seals. During the c...

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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