An Analysis of the Main Factors on the Wear of Brushes for Brush-Type Motors and the Ways of Increasing their Lifetime

2015 ◽  
Vol 792 ◽  
pp. 107-112
Author(s):  
Oleg S. Kachin ◽  
Alexander S. Karakulov ◽  
Alexander B. Serov
Keyword(s):  
Mathematical Model ◽  
Mathematical Description ◽  
Sliding Contact ◽  
Constant Force ◽  
Mechanical State ◽  
Optimum Pressure ◽  
Mechanical Condition ◽  
The Real ◽  
Main Factors

The mathematical description of the wear processes of brushes of brush-type motors is described. The actions directed on increase of the lifetime of brushes are offered. The proposed mathematical model of the wear processes of brushes considers the highest number of parameters of a sliding contact, including sparking energy of windings switching and the mechanical condition of a commutator and bearings. The approach for evaluating the optimum pressure on the brush in order to increase its resource is offered. The real and the virtual lifetime tests of the universal motor considering changing of the mechanical state of the commutator and bearings during lifetime were carried-out. The constant force value acting on the brush which provides its lifetime increase by 11% is proposed.

New Holtz Electrical Machine

1877 ◽  
Vol 3 (70supp) ◽  
pp. 1108-1108
Author(s):  
Elihu Thomson
Keyword(s):  
Electrical Machine

TLS A7 MODIFIED

Alloy Digest ◽  
2007 ◽  
Vol 56 (4) ◽  
Keyword(s):  
Wear Resistance ◽  
Physical Properties ◽  
Tool Steel ◽  
Heat Treating ◽  
Sliding Contact ◽  
Vanadium Carbides

Abstract TLS A7 Mod. is a modified A7 tool steel that is air hardening and has exceptional wear resistance due to vanadium carbides. It is especially good in sliding contact and often used to handle wet slurries. This datasheet provides information on composition, physical properties, and hardness. It also includes information on wear resistance as well as forming, heat treating, and machining. Filing Code: TS-645. Producer or source: Timken Latrobe Steel.

Cracking of a Graded Half Plane Due to Sliding Contact

2001 ◽  
Author(s):  
Frazil Erdogan ◽  
Serkan Dag
Keyword(s):  
Half Plane ◽  
Sliding Contact
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