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Shield sealing contact surface restoring method

A repair method and contact surface technology, which is applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve problems such as high cost, temporary solution, and poor performance of driving and sealing performance, and achieve low cost and short repair period Short, excellent sealing effect

Inactive Publication Date: 2012-06-13
SHANGHAI TUNNEL ENGINEERING CO. LTD.
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method treats the symptoms but not the root cause. The newly-made drive seal needs to re-make the mold, which is relatively expensive, and because the contact surface (shield A ring) is worn differently, the groove depth is also different, so the newly customized drive seal has no effect on the sealing performance. bad

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Embodiment Construction

[0018] The present invention will be described in detail below in conjunction with the embodiments shown in the accompanying drawings.

[0019] The repair of the lip contact plane of the key parts of the shield has the following two characteristics:

[0020] 1. The size of the parts is large. Since the worn part and the notch ring are welded as a whole, the overall size is large, which objectively brings greater repair difficulties.

[0021] 2. The requirements for plane repair are high. Since the function of the worn part is to provide a sealing plane, there are high clear requirements for the repaired surface finish, flatness, surface hardness and wear resistance.

[0022] According to the flatness industry standard, the flatness of the lip seal contact plane is ≤0.1mm; the surface finish must not be lower than the accuracy of micro-discrimination of the direction of the machining trace; the surface hardness and wear resistance must meet the construction requirements.

[00...

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Abstract

The invention discloses a shield sealing contact surface restoring method, which comprises a fusion welding filling step, wherein the fusion welding filling step comprises at least two circulations, in each circulation, grooves formed in the sealing contact surface are subjected to the fusion welding filling, and the stress caused by the fusion welding is relieved; and bead welds formed by the fusion welding filling are ground to the original plane height. The shield sealing contact surface restoring method avoids the thermal deformation problem of the original process in the fusion welding filling process, so operators can also control the fusion welding filling in the process, and the planeness of the final control is realized. The shield sealing contact surface restoring method has the advantages that the cost is lower, the restoring work period is short, the effect is good, and the sealing performance is good.

Description

technical field [0001] The invention relates to shield equipment, in particular to a method for repairing the sealing contact surface of the shield. Background technique [0002] During the excavation process of the shield machine, due to the long-term friction between external sediment and other impurities and the contact plane of the drive seal, the seal contact surface and the lip seal ring of the large bearing are worn to varying degrees during the rotation of the large bearing, resulting in grooves. If it is not repaired, it will affect future construction. If the lip seal contact plane does not meet the construction requirements, it will cause damage to the drive system. [0003] The A-ring groove caused by the friction between the driving sealing surface and the contact surface (shield A-ring) was previously solved by replacing the A-ring. This method is costly and has a long construction period, which is not conducive to the normal construction of the project. [0...

Claims

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Application Information

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IPC IPC(8): B23P6/00B23K9/04
Inventor 王胜勇张杰张雯静吴忠明王炜颢
Owner SHANGHAI TUNNEL ENGINEERING CO. LTD.
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