A high-speed railway hanging string pre-fitting method to compensate for the impact of contact wire wear
A high-speed railway and contact wire technology, applied in the direction of overhead lines, etc., can solve problems such as harsh service conditions, and achieve the effect of long service life and good performance
Active Publication Date: 2021-07-20
WUHAN UNIV OF TECH
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Problems solved by technology
Its service conditions are harsh, and after a long period of operation, the parts will inevitably wear out, which will lead to changes in the structural state and performance of the catenary
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[0041] Below by embodiment, in conjunction with accompanying drawing, the technical scheme of the present invention is described further specifically, as Figure 1-2 As shown, each line on the figure represents the position of the contact line under different wear coefficients, the horizontal axis is the distance along the line, and the vertical axis is the height of the contact line. The allowable deviation of contact line height within a single anchor segment is ±30mm, the allowable range of contact line height difference between adjacent anchor points is 20mm, and the allowable range of contact line height difference between adjacent hanging strings is 10mm. It can be calculated that when the wear coefficient is 0.2, the height deviation of the contact line in the anchor section is 32.62mm, which exceeds the specified value by 30mm; It is 1.74mm, and the change is small.
[0042] Such as image 3 As shown in Fig. 1 , the height change diagram of the contact line under dif...
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The invention provides a high-speed railway hanging string pre-configuration method for compensating the impact of contact wire wear. During the one-time overall installation process of the catenary, 1 / 2 of the lifting amount of the contact wire suspension point when the wear coefficient is the maximum acceptable value is taken as The reserved slack of the suspension point goes through the following steps: (1) solving the initial equilibrium model of the catenary; (2) pre-fitting the hanging string; (3) calculating the parameters of the worn contact line; (4) establishing the wear calculation model of the catenary ; (5) Calculate the change value of the guide height of the worn catenary; (6) Calculate the pre-configured length of the catenary suspension string. The invention reasonably sets the reserved slack of the suspension point of the catenary, so that after wear, it can gradually approach the ideal guide height, and then deviate from the ideal guide height again, so as to ensure the geometric smoothness fluctuation in the entire service life of the catenary. The deviation from the ideal value is small, so as to obtain better performance and longer service life.
Description
technical field [0001] The invention belongs to the field of electrified railways, and in particular relates to a high-speed railway hanging string preconfiguration method for compensating the impact of contact wire wear. Background technique [0002] At present, my country has realized the networked operation of high-speed rail, and the catenary is an important part of the high-speed railway traction power supply system. Its service conditions are harsh, and after a long period of operation, the parts will inevitably wear out, which will lead to changes in the structural state and performance of the catenary. The contact wire bears the high-speed sliding friction of the pantograph slide, and bears both mechanical and electrical losses. After the contact line wears out, the non-uniformity of conductance in the whole anchor section gradually deteriorates and deviates from the initial design value. Considering the performance of the catenary over the entire service life, it ...
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IPC IPC(8): B60M1/28
CPCB60M1/28
Inventor 阮杰林炜钰路利彬余昉
Owner WUHAN UNIV OF TECH