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Volume 55 Issue 1
Jan.  2020
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Article Contents
Journal of Southwest Jiaotong University  > 2020  >  55(1): 52-59.
ZHANG Huailiang, ZHAO Lina, ZHOU Jingxing. Design Method of Hydraulic Valve Block for Tunnel Boring Machine[J]. Journal of Southwest Jiaotong University, 2020, 55(1): 52-59. doi: 10.3969/j.issn.0258-2724.20180072
Citation: ZHANG Huailiang, ZHAO Lina, ZHOU Jingxing. Design Method of Hydraulic Valve Block for Tunnel Boring Machine[J]. Journal of Southwest Jiaotong University, 2020, 55(1): 52-59. doi: 10.3969/j.issn.0258-2724.20180072
shu

Design Method of Hydraulic Valve Block for Tunnel Boring Machine

doi: 10.3969/j.issn.0258-2724.20180072
Funds:  The National Basic Research Program of China (973 Program)
  • Received Date: 23 Feb 2018
  • Rev Recd Date: 18 Sep 2018
    • Available Online: 10 Oct 2018
  • Publish Date: 01 Feb 2020
    Abstract
  • In order to improve the flow quality of flow channels in hydraulic valve block under foundation vibration, a simulation model of flow channels under foundation vibration was established based on finite element theory and the correctness of the simulation model was verified. The effects of the different flow channels layout, process holes structure parameters, import and export flow length on the pressure drop characteristics of flow channels were analyzed under the foundation vibration. The design flow of hydraulic valve block under the foundation vibration was put forward. The results show that the U-shaped flow channel has the best pressure drop characteristics and Z-shaped has the worst pressure drop characteristics under the foundation vibration; the shorter U-shaped groove hole length is, the smaller the pressure drop average and the pressure drop fluctuating is; when the length of Z-shaped flow channel fabrication hole is 3.5 times the diameter of fabrication hole, the length of V-shaped flow channel fabrication hole is 3 times the diameter of fabrication hole, the average and fluctuating of pressure drop are less; it is helpful to reduce the impact of foundation vibration when the diameter of fabrication hole is bigger than the diameter of import and export flow channel; when the length of the export flow channel is over 3 times the diameter of export flow channel, it is beneficial to avoid recovery area after the outlet flow channel in turn flow field. The new method can effectively reduce the pressure drop in valve block and improve the pressure stability.

     

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