Key technology of shield machine main drive sealingChinese Full Text
LI Run-jun;SHAN Ren-liang;LI Run-sheng;GUI Yi-xiong;China University of Mining and Technology ( Beijing);Beijing Urban Construction Design ＆ Development Group;
Abstract: In the earth pressure balance shield machine tunneling process,it is easy to happen that shield main bearing is damaged,owing to main drive sealing failure. In order to solve the problem,using the method of combining theoretical analysis and field testing,introducing the principle of main drive sealing,the main drive seal damage reason is analyzed. VD sealing with adhesive mounting prone to be destroyed for the stress of concentration occurs. The lip seal and sealing bushing using NBR material is extremely easy to cause the wear failure in the condition of high temperature. The improved plan is proposed: changing the seal material into chloric synthetic rubber with the characteristic of high temperature resistance and anti-fatigue. VD sealing installation uses pressing mode that will make the combination of seal and shell be more reliable,and it also avoid the fracture failure of seal caused by uneven force. Through the application and detection of subsequent practical engineering,seal damage accident disappears,and the plane has achieved the expected effect of sealing modification technology research.The results show: sealing material,installation form and sealing grease are key factors,which influence the working status of the main drive sealing. This should be paid high attention in the process of type selection design of shield machine.
- DOI：
10.13800/j.cnki.xakjdxxb.2014.0513
- Series：
- Subject：
- Classification Code：
U455.39
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