A method for calculating that pressure loss along the path of a wound hydraulic hose under an axial vibration environment is disclosed
A technology of axial vibration and calculation method, applied in the direction of calculation, computer-aided design, design optimization/simulation, etc., can solve the problems of accelerated fatigue failure of hoses, impact of downstream hydraulic components, and increase of fluid fluctuations of hoses
Active Publication Date: 2019-01-18
CENT SOUTH UNIV
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[0002]
As one of the key systems of TBM, the hydraulic system assists the hard rock TBM to complete propulsion, shoe support and other actions. The working principle of TBM is to use the rotation of the tool to squeeze the rock around the tunnel for excavation. Since there are gaps in the rock, Faults, TBM will inevitably generate strong vibration during the excavation process. As an important component of the TBM hydraulic system, the winding hydraulic hose will increase the stress between the layers of the hose wire; it will aggravate the vibration of the hose and accelerate the fatigue of the hose Destruction; it will increase the fluctuation of the fluid in the rubber hose and impact the downstream hydraulic components; affect the energy transfer and work efficiency of the TBM hydraulic system
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[0095] A calculation method for the pressure loss of the wound rubber hose along the axial foundation vibration environment, the basic process is as follows figure 1 As shown, the specific implementation process of the method is illustrated by taking four layers of wound steel wire (basic parameters are shown in Table 1) as an example.
[0096] Table 1 Hydraulic hose parameters
[0097]
[0098] The microscopic model of the single-layer plate of the steel wire reinforced layer of the wound rubber hose is established as follows: Figure 2 ~ Figure 4 as shown, figure 2 with image 3 Among them, 1 represents rubber and 2 represents steel wire. According to the series and parallel connection of composite materials, the engineering constant of single-layer board can be obtained as:
[0099]
[0100] Here take Es=1.77×10 5 MPa; μ s =0.3; Eru=7.8MPa; μ ru =0.49;
[0101] Since the force of the actual hydraulic hose is along the axial and radial directions of the hose, ...
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A method for calculating that pressure loss along the path of a wound hydraulic hose under an axial vibration environment is disclosed. Firstly, the structural model of the wound hydraulic hose is established, and the engineering constants are calculated according to the structural model. Then, the fluid-solid coupling model of the axial vibration of the wound hydraulic hose is established according to the fluid-solid coupling theory and the forced vibration theory of the liquid-filled pipeline. The flow state and friction coefficient of the fluid in the wound hydraulic hose under the axial vibration environment are calculated, and the numerical calculation formula of the loss along the axial vibration of the hose is deduced. Finally, the simulation calculation is carried out. The invention provides an important basis for the type selection design and anti-vibration design method of the rubber hose in the TBM, According to the calculation method provided by the invention, the energy dissipation of the TBM hydraulic long pipe can be calculated effectively and accurately, the dynamic response law of the system can be analyzed, the optimal layout mode of the TBM hydraulic pipe and themethod for improving the response speed of the system can be found.
Description
technical field [0001] The invention relates to the field of hydraulic transmission and control, in particular to a method for calculating pressure loss along the course of a wound hydraulic hose in an axial vibration environment. Background technique [0002] The hydraulic system is one of the key systems of the hard rock tunnel boring machine TBM, which assists the hard rock tunnel boring machine to complete the actions such as propulsion and shoe support. The working principle of the TBM is to use the rotation of the tool to squeeze the rock around the tunnel for tunneling. Because there are gaps in the rock, Faults, TBM will inevitably produce strong vibration during the excavation process. As an important component of the TBM hydraulic system, the winding hydraulic hose will increase the stress between the layers of the hose steel wire; it will aggravate the vibration of the hose and accelerate the fatigue of the hose Destruction; it will increase the fluctuation of the...
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IPC IPC(8): G06F17/50
CPCG06F2119/04G06F2111/10G06F30/17G06F30/20G06F2119/06Y02T90/00
Inventor 杨忠炯李俊周立强蔡岳林张高峰
Owner CENT SOUTH UNIV