EXPERIMENTAL-DETERMINATION OF THE CONTACT FRICTION FOR AN ELECTROMAGNETICALLY ACCELERATED ARMATURE

被引：19

作者：

ROSS, DP ^{[1
]}

FERRENTINO, GL ^{[1
]}

YOUNG, FJ ^{[1
]}

机构：

[1] FRONTIER TIMBER CO,EMF DIV,STATE COLL,PA 16801

来源：

WEAR | 1982年 / 78卷 / 1-2期

关键词：

D O I：

10.1016/0043-1648(82)90030-8

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The friction forces on the contacts of the sliding armature in an electromagnetic launcher represent significant energy losses affecting the overall performance. Friction produces unwanted heating at the contact-rail interface which leads to accelerated wear and chemical erosion of the contacts. Eventually, the armature material at the interface will soften and melt followed by rapid evaporation due to arcing. To prevent this failure, the contact force must be gauged accordingly; the compliance must account for not only changes in barrel width dye to rail unevenness but changes in contact length due to wear. Usually for successful operation at high current densities (greater than 1 Ga m** minus **2) armatures with multiple contacts are employed to circumvent this dilemma. An experimental program was instituted to define the limitations of high speed high current contacts for electromagnetically accelerated armatures. One facet of this work, the determination of friction and contact forces for a simple plate-type armature, is presented.

引用

页码：189 / 200

页数：12