Effects of Polarity on Evolution Process and Erosion of Current-carrying Arc
Journal Title: 河南科技大学学报（自然科学版） - Year 2017, Vol 38, Issue 4
Abstract
Experiment on the effects of polarity on evolution process and erosion of current-carrying arc was carried out in the home-made current-carrying arc testing machine. The results indicate that when tunsten probe as the anode and copper as the cathode, current-carrying arc burns vigorously and lasts for a long time along with overflowing of large amounts of vapors, so severe erosion is observed. However, when tunsten probe is used as the cathode and copper as the anode, current-carrying arc burns faintly for a short time along with overflowing of little vapors and the arc erosion is alleviated. It is found that current-carrying arc has obvious polarity characteristics. The evaporation and gasification of anode material have distinct influence on arc burning by analyzing the producing mechanism of charged particles, the arc states and the arc erosion mechanism. Thus the current-carrying arc burning can be restrained by dispersing heat input of electrons in arc. The arc erosion can be alleviated through shortening burn time of metallic vapor state arc.
Authors and Affiliations
Lianmei SONG, Yongzhen ZHANG, Bao SHANGGUAN, Zhenghai YANG
Keywords
Related Articles
- EP ID EP478082
- DOI -
- Views 72
- Downloads 0
Performance Test of Aluminum Alloy Floor Formwork
The uniform load tests were carried out on a single aluminum alloy floor formwork and a model room composite aluminum alloy floor formwork system respectively, and the contrastive analysis was carried out.When the three...
Bifurcation of Limit Cycles for a Class of Quartic Kolmogorov System
The bifurcation of limit cycles for a class of quartic Kolmogorov's system was investigated at the positive equilibrium point( 1,1). The first five singular point values of accompanied complex system were calculated by u...
Existence of Nontrivial Solution of a Class of p-Laplacian Equation
The existence of nontrivial solutions for a class of p-Laplacian equations was studied via Nehari manifold. Four lemmas were got. Nehari manifold was non empty. On the Nehari manifold,the greatest lower bound of the func...
Preparation and Photoelectric Properties of a New-type Tantalum Nitride Semiconductor Thin Films Electrode
Tantalum nitride ( Ta3N5) thin film electrode were synthesized through an anodization and hightemperature nitrification method. The cross-section morphology, crystal structure and surface composition of the prepared Ta3N...
Shear Capacity Prediction of Reactive Powder Concrete Beams Based on Neural Network
In order to explore the effectiveness of back-porpagation( BP) neural network shear capacity prediction of simply supported reactive powder concrete( RPC) beams,the shearing failure test results of the 14high-strength re...