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RISS 인기검색어
- 검색키워드
- 저자 : Laikuang Lin (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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Wear Characteristics of TBM Disc Cutter Ring Sliding against Different Types of Rock
Laikuang Lin,Yimin Xia,Xuhui Zhang 대한토목학회 2020 KSCE JOURNAL OF CIVIL ENGINEERING Vol.24 No.10
To investigate wear characteristics of tunnel boring machine (TBM) disc cutter rings interacting with types of rock, a range of wear tests were performed on a TBM cutter test rig, and laboratory-scale disc cutters were used in the experiments. The mass loss, vertical load, temperature field, wear mechanism and change rule of cutter tip for the disc cutter rings were obtained during the tests. The results indicate that the rock types and properties of rock exhibit great influences on the cutter wear. The variation of the weight loss testing with different types of rock is partially explained by the discrepancies of vertical load, cutting temperature, and the transition of wear mechanisms. In addition, the test results show that the wear characteristics of cutter rings are mainly affected by uniaxial compressive strength (UCS) rather than equivalent quartz content (EQC) for types of rock. This study will benefit the design of cutter rings with enhanced wear resistance.
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Structure effect of a suction pipe on slag-discharging performance in a shaft boring machine
Hejia Jiang,Laikuang Lin,Zhongbao Wen,Xuemeng Xiao,Zixiong Zhou,Yimin Xia 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.9
The efficiency and stability of shaft boring machines depend critically on the slag-discharging system. In this study, we simulate the slagging process by using the coupled computational fluid dynamics/discrete element method and validate the method’s reliability through experiments. We investigate the impact of outlet diameter, inlet diameter, and outlet section length on slag-discharging performance. We establish the slag-discharging principle of the suction pipe by analyzing the particle motion trajectory. The flow field close to the suction pipe can be classified into collecting and lifting zones on the basis of the main flow direction velocity. Furthermore, we propose pipes with seven typical types, among which the straightconical type exhibits the most favorable slag-discharging performance. The straight-conical pipe enhances the slag-discharging mass by 22.49 % compared with the straight pipe.
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Performance assessment and structural design of the atmospheric cutterhead of slurry shield machine
Feixiang Liu,Qingyang Wang,Zhiyong Ji,Laikuang Lin 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.11
The atmospheric cutterhead is a new type of cutterhead with high technical difficulty. Compared with the conventional cutterhead, the spatial structure of the atmospheric cutterhead is more complicated, and a mature design theory has not yet been formed. This paper presents an atmospheric cutterhead design method for slurry shield machines. The method was divided into three steps: (i) design load analysis; (ii) multiobjective topology optimization; and (iii) evaluation and selection of cutterhead structures. Based on topology optimization theory, four types of cutterhead structures with different numbers of radial arms are obtained. The performance of the cutterhead was evaluated by stress, deformation, vibration mode, opening situation and space complexity, and the five-radial arm cutterhead was determined to be the best solution. Analysing the actual tunnelling parameter data shows good engineering adaptability. This paper provides a reference for the optimal design of the atmospheric cutterhead of slurry shield machine.
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