Center rotary joint of earth pressure balance shield machine

Abstract

The invention discloses a center rotary joint of an earth pressure balance shield machine. The center rotary joint comprises a center stator, wherein the center stator and a rotor are connected through bearings; the center stator is connected with a passive stirring rod and a stop block through splines; the tail part of the center stator is provided with a water spraying joint device; the rotor is connected with a peripheral stator; the rotor is directly connected with a cutter head flange fixedly connected with a cutter head; and the bearings used for connecting the center stator and the rotor comprise a sliding bearing and a self-aligning roller bearing. The center rotary joint adopts an integral design structure; a fluid passage and a hydraulic passage form a whole, so that the structure is more compact; higher processibility is realized; and the manufacturing cost and the maintenance cost are reduced. The center rotary joint adopts a double-stator and single-rotor design; fluid media and hydraulic media can be easily conveyed; the bearings are adopted for rotating supporting; the precision is high; a stirring and center high-pressure flushing system is designed in the center, so that the problem of mud cake forming in the center of the cutter head is solved; and 0.24L / ring of EP2 grease and 0.5L / ring of HBW are saved.

Description

technical field [0001] The invention relates to the field of shield machine hydraulic equipment, in particular to a center rotary joint of an earth pressure balance shield machine. Background technique [0002] With the continuous development of society, especially the continuous improvement of the degree of mechanization, the shield machine, as an important equipment in the machinery industry, has emerged with the rapid development of underground engineering and tunnel construction. As the center slewing structure in the setting of the shield machine, it is an important part that cannot be ignored. [0003] At present, among the mainstream models of shield tunneling machines in the world, there are mainly two types of design types of the central rotary joint: Figure 4 As shown in the figure on the left, the central partition of the main drive serves as a part of the partition of the soil bin. It is a fixed structure. The central rotary joint passes through the partition a...

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Problems solved by technology

[0005] In order to overcome the deficiencies in the above-mentioned prior art, the present invention provides an integral design structure, the fluid channel and the hydraulic channel are integrated, making the structure more compact, reducing the manufacturing cost and maintenance cost, and also solving the problem of The central rotary joint of the soil shield machine with the problem of mud cake formation in the center of the cutter head

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