Quick-replaceable main drive seal structure of shield machine

Abstract

The invention discloses a quick-replaceable main drive seal structure of a shield machine. The main drive seal structure comprises a welded base plate, a sealing wear-resisting plate, a sealing fixed plate, a lip seal, an inside sealing pressing plate, an outside sealing pressing plate and a sealing connecting plate, wherein the inner end face of the welded base plate is fixed to the outer end face of a cutter head flange; the inner end face of the sealing wear-resisting plate is fixed to the outer end face of a main drive frame; two ends of the lip seal are fixed to the inner end face of the sealing fixed plate by means of the inside and outside sealing pressing plates respectively; and the inner side face of the sealing fixed plate is engaged and located on the outer side face of the welded base plate. The quick-replaceable main drive seal structure of the shield machine is simple and low in cost investment; the structure is quite convenient to mount, demount and replace, so that the maintenance time and the maintenance cost are greatly reduced, and the maintenance efficiency and the convenience are improved; and the structure can be additionally arranged on the basis of the previous main drive structure of the shield machine to protect the previous seal system, and the structure can be replaced quickly after being damaged, so that the transformation and upgrading of equipment are facilitated, and the cost is saved.

Description

technical field [0001] The invention relates to the technical field of shield machines, in particular to a rapidly replaceable shield machine main drive sealing structure. Background technique [0002] At present, the main drive seal structure used by domestic shield machines is mainly radial seal, that is, radial lip seal is used, and sealing grease is injected into the cavity between the two lip seals, because the seal structure only allows grease to flow outward , so as to achieve the purpose of sealing. [0003] However, this type of seal can only be installed inside the main drive. Once muck enters the seal cavity due to some factors (such as insufficient grease injection) during construction, the lip seal will be damaged and the seal will fail. Once the seal fails, the seal must be replaced. Otherwise, foreign matter such as dregs will enter the main bearing and transmission gear of the main drive, causing damage to key components and even greater losses. The convent...

AI Technical Summary

Problems solved by technology

This method has a long construction period, limited internal space of the equipment, difficult disassembly and installation, and high cost investment

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