New sealing form shield machine central gyratory body

Abstract

The invention discloses a shield tunneling machine central revolving body with a novel sealing form. The shield tunneling machine central revolving body with new sealing form comprises a shell, a rear revolving body, a transition plate, a front revolving body and revolving stopping frames. The rear revolving body is arranged in the shell, and the rear revolving body is connected with the front revolving body through the transition plate; a floating sealing ring and a labyrinth sealing ring are arranged on the surface of the front revolving body, and the labyrinth sealing ring is arranged at the side, close to the extending end of the front revolving body, of the floating sealing ring; the floating sealing ring is of three VD lip-shaped sealing structures, and the revolving stopping frames are arranged at the bottom of the front revolving body and the bottom of the shell; and a compensating support is arranged at the side face of each revolving stopping frame. According to shield tunneling machine central revolving body with new sealing form, the sealing effect is good, and abnormal damage caused by local pressing for the floating sealing ring can be reduced.

Description

technical field [0001] The invention relates to the technical field of shield machines, in particular to a central rotator of a shield machine with a new sealed form. Background technique [0002] Shield tunnel boring machine, referred to as shield machine. It is a special construction machine for tunnel excavation. The modern shield boring machine integrates optical, mechanical, electrical, hydraulic, sensing, and information technologies. And other functions, involving geology, civil engineering, machinery, mechanics, hydraulics, electricity, control, measurement and other disciplines and technologies, and "tailor-made" design and manufacture according to different geology, the reliability requirements are extremely high. Shield boring machines have been widely used in subway, railway, highway, municipal, hydropower and other tunnel projects. [0003] In addition to considering the number of fluid channels and being suitable for fluid media, the current central joint for...

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Problems solved by technology

[0003] In addition to considering the number of fluid channels and being suitable for fluid media, the current central joint forms on the market are mainly due to the unsatisfactory sealing form, which does not fully consider that mud and muck will squeeze into the sealing part under the pressure of the soil cabin during the excavation process, causing rapid sealing. Damage, did not take into account the decline of the sealing effect of the rotating dynamic seal after long-term use, and the non-concentricity of the rotary shaft, the cutter head, and the main drive, resulting in local pressure on the seal and accelerated seal wear, but the above problems have occurred in actual use

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