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Effect of Temperature on Wear of Railway Overhead Line-pantograph System under Electrical Current

Author: BoJun
Tutor: ChenGuangXiong
School: Southwest Jiaotong University
Course: Mechanical Design and Theory
Keywords: Wear and tear Temperature Catenary system Pantograph
CLC: U226.8
Type: Master's thesis
Year: 2010
Downloads: 120
Quote: 4
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Abstract


Rail transport is one of the important means of transport . At present, China 's high-speed rail transport , heavy-duty , long mileage and other characteristics. Electric locomotive pantograph system is an important part of one of the electric locomotives to provide power only effective way . Pantograph system by flow quality , pantograph directly affect the life of electric traction trains running . Pantograph system affecting friction and wear properties of the main factors are: temperature, current, environment . Among them, the temperature will change the contact pairs between the morphology change asperity characteristics , thereby changing the friction coefficient, friction and wear performance impact . High temperatures may also result in contact between the adhesive wear heavier deputy . Therefore, the system of temperature on the carrier network system wear bow influence mechanism to improve its tribological properties of great significance . In this thesis, the pin - disk tester conducted a series of catenary on the carrier material friction and wear tests . Pin specimen material is pure carbon , taken from the railroad in use pantograph . Disc sample material is copper , but also a railway contact wire material . Using the data acquisition system records the coefficient of friction , disk speed , and current intensity sample . Measured using precision electronic scale specimen wear off , using a scanning electron microscope (SEM) for wear on the friction surface morphology of the sample analysis using energy dispersive spectroscopy (EDS) of the specimen surface composition analysis. Detailed study of the temperature on the friction coefficient, wear , surface morphology and composition effects . The results showed that : 1. Temperature on the bow net system contacts the friction coefficient of friction greater impact , generally the higher the temperature , the lower the coefficient of friction . (2) temperature a great impact on the wear , abrasive wear when low , wear amount is small. Temperature (200 ℃ above) to adhesive wear, and that a large amount of wear . 3.Temperature great influence on the friction surface morphology , high temperature causes the formation of carbon oxides slide friction surface material and the molten layer . 4 temperature is a major factor in the amount of wear , when the temperature is low (below 160 ℃) carrying the dry abrasion test and the abrasion wear test no current difference between the amount is not

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CLC: > Transportation > Rail transport > Electrified railway > Electrified railway maintenance and overhaul > Repair and maintenance of catenary
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