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Main drive sealing system and method of shield machine self-adapting to soil bin pressure changes

A technology of soil bunker pressure and sealing system, which is used in earth-moving drilling, mining equipment, mining equipment, etc., can solve the problems of increasing construction cost, aging and wear, and deformation of the sealing body, so as to control the oil consumption and ensure the performance. , the effect of prolonging the service life

Pending Publication Date: 2020-09-01
TIANHE MECHANICAL EQUIP MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the grease injection pressure and grease injection volume of the main drive sealing system continue to be low, the sealing effect will be poor, and impurities such as water and soil will easily enter the main drive, thus damaging the main drive transmission system
[0007] If the grease injection pressure and grease injection volume are continuously high, it will cause the seals to work under high pressure for a long time, which will easily cause deformation, aging and wear of the seal body, thereby shortening the service life of the main drive sealing system
Furthermore, the continuous high amount of grease injection will inevitably lead to waste of lubricating medium, thus increasing the construction cost

Method used

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  • Main drive sealing system and method of shield machine self-adapting to soil bin pressure changes
  • Main drive sealing system and method of shield machine self-adapting to soil bin pressure changes
  • Main drive sealing system and method of shield machine self-adapting to soil bin pressure changes

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0034] Such as image 3 As shown, the main drive sealing system of the shield machine adaptive to the pressure change of the soil bin includes a fluid channel box 2, a friction ring 6, a sealing medium 3, a sealing spacer ring 5, a plurality of sealing rings 4, a port labyrinth ring 1, and a pressure control module . Fluid channel box 2, friction ring 6, sealing spacer ring 5 and multiple sealing rings 4 are coaxially arranged, fluid channel box 2 is set on friction ring 6 and forms an annular gap with friction ring 6, port labyrinth ring 1 and a plurality of sealing rings 4 divide the gap into multiple annular pressure chambers 7, and a plurality of injection channels 8 for injecting sealing medium 3 into each pressure chamber 7 are opened in the fluid passage box 2, and the sealing medium 3 is filled in the injection Inside the channel 8 an...

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Abstract

The invention discloses a main drive sealing system and method of a shield machine self-adapting to soil bin pressure changes. The system comprises a fluid channel box, a friction ring, a sealing medium and a plurality of sealing rings. The fluid channel box sleeves the friction ring and an annular gap is formed between the friction ring and the fluid channel box, the plurality of sealing rings divide the gap into a plurality of annular pressure cavities, an injection channel is formed in the fluid channel box, and the sealing medium is filled in the injection channel and the pressure cavities. In order to control water and soil pressure and various working pressure, the sealing method meets the following conditions that P<2>=P<1>+[delta]P<1>, and P<N>=P<N-1>-[delta]P<N>, [delta]P<1>>0, and [delta]P<N>>0. According to the system, the working pressure of the main drive sealing system can be linked with the soil bin pressure changes, so that the pressure bearing capacity of the main drive sealing system can be matched with the soil bin pressure changes; the shield machine working under ultra-high water and soil pressure has a higher demand for the sealing effect of the main drive sealing system, and higher working reliability is required.

Description

technical field [0001] The invention belongs to the field of shield machine equipment, and in particular relates to a main drive sealing system and method of a shield machine adaptive to pressure changes in soil bins. Background technique [0002] In recent years, with the increasing number of tunnel projects at home and abroad, shield machines have been widely used as important construction equipment for tunnel projects. The main drive is the key core component of the shield machine, and its working reliability directly determines the working status of the whole shield machine. Therefore, the present invention conducts research on how to improve the sealing effect of the main drive of the shield machine. [0003] Such as figure 1 , 2 As shown, in general, the main drive seal types commonly used on shield machines are divided into two categories: 1) multi-channel VD rubber seal arrangement and combination type; 2) multi-channel four-finger polyurethane seal arrangement an...

Claims

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Application Information

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IPC IPC(8): E21D9/06E21D9/00E21F17/18E21F17/00
CPCE21D9/00E21D9/003E21D9/0635E21F17/00E21F17/18
Inventor 张路赛邓高钰姜鹏王峰民杨开全刘友辉贾星月
Owner TIANHE MECHANICAL EQUIP MFG
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