Electric contact systems - passing power to the trains

2006 ◽  
Author(s):  
D. Hartland
Keyword(s):  
Electric Contact

Analysis of electro- and thermophysical processes occurring during electrocontact baking of flour products.

2020 ◽  
Vol 29 (11) ◽  
pp. 50-55
Author(s):  
V.I. Maklyukov ◽  
◽  
E.O. Gerasimova ◽  
N. V. Labutina ◽  
E.N. Rogozkin ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Theoretical Calculation ◽  
Heat Balance ◽  
Electric Contact ◽  
Wheat Dough ◽  
Baking Process ◽  
Free Moisture ◽  
Contact Heating ◽  
The Heat Balance

The article considers the results of research conducted during electric contact heating of rye-wheat dough pieces. It is established that the electrical conductivity of the crumb dough does not depend on the total humidity of the material, but mainly on the amount of free moisture. Using the current and temperature graphs, you can imagine how free moisture changes during the baking process and the influence of the thermophysical and colloidal process on the change in the value of free moisture. Experimentally determined the amount of heat that is spent on baking 1 kg of bread. The accuracy of the theoretical calculation of this parameter in the heat balance of the baking chamber is confirmed.

Electric Contact Stability and Wear Durability at a Nanoscale Sliding Electric Contact

2013 ◽  
Vol 133 (6) ◽  
pp. 229-236
Author(s):  
Yasushi Tomizawa ◽  
Yongfang Li ◽  
Akihiro Koga ◽  
Hiroshi Toshiyoshi ◽  
Yasuhisa Ando ◽  
...  
Keyword(s):  
Electric Contact ◽  
Contact Stability ◽  
Sliding Electric Contact

Investigation of pre-sprayed powders for electric contact welding

2020 ◽  
pp. 143-149
Author(s):  
Dinar R. Masalimov ◽  
Roman R. Galiullin ◽  
Rinat N. Sayfullin ◽  
Azamat F. Fayurshin ◽  
Linar F. Islamov
Keyword(s):  
Adhesion Strength ◽  
Electrical Contact ◽  
Research Purpose ◽  
Flame Spraying ◽  
Powder Materials ◽  
Electric Contact ◽  
Metal Powders ◽  
Unstable Flow ◽  
Gas Flame ◽  
Contact Welding

There are a number of difficulties in the electrical contact welding of powder materials: shedding of powder from the surface of a cylindrical part, impossibility of hardening the layer during welding due to flushing of the powders with coolant and unstable flow of powder into the welding zone. One solution is pre-spraying the powder in some way. (Research purpose). The research purpose is investigating the possibility of electric contact welding of metal powders preliminarily sprayed by a gas-flame method, namely, adhesion strength and losses during preliminary gas-flame spraying of powders. (Materials and methods) Powders of grades PG-NA-01, PrKhIIG4SR, PRZh3.200.28 were sprayed onto flat samples of St3 steel, polished to a roughness of Ra 1.25. The strength of powder adhesion to the base was studied by the cut method. (Results and discussion) The percentage loss of the powder as a whole is 3-23 percent for all the distances studied. The greatest powder losses appear at a distance of more than 180 millimeter from the tip of the burner for powders of grades PG-NA-01 and PrKhIIG4SR. The smallest powder losses were observed for PrZh3.200.28 powder, which totaled 3-7 percent. The maximum adhesion strength of the sprayed powders to the surface was 22.1 megapascals' when spraying the PG-NA-01 powder. The adhesion strength of powders of the grades PrKhIIG4SR and PrZh3.200.28 is small and amounts to 0.2-3 megapascals'. (Conclusions) The use of preliminary flame spraying of powders for their further electric contact welding is possible using PG-NA-01 grade powder, while the best adhesion to the base (that is more than 20 megapascals') is achieved with a spraying distance of 120-140 millimeter. The smallest powder losses during flame spraying are achieved at a spraying distance of 100-160 centimeters', at which the powder loss for the studied grades was 4-12 percent.

Formation of interparticle junctions during electric contact sintering of metal powders

1992 ◽  
Vol 47 (10) ◽  
pp. 59
Author(s):  
L.O. Andrushchik
Keyword(s):  
Electric Contact ◽  
Metal Powders

Simulation based analysis of electrical fire risks caused by poor electric contact between plug and receptacle

2021 ◽  
pp. 103434
Author(s):  
Jing Zhang ◽  
Lida Huang ◽  
Tao Chen ◽  
Guofeng Su
Keyword(s):  
Electric Contact ◽  
Simulation Based

Modeling study of the amount of wear in sliding electric contact

2012 ◽  
Author(s):  
Chen Zhonghua ◽  
Hui Lichuan ◽  
Wang Tiejun ◽  
Guo Fengyi
Keyword(s):  
Electric Contact ◽  
Sliding Electric Contact ◽  
Modeling Study

A method of investigating the electric-contact sintering of powder materials

1986 ◽  
Vol 25 (1) ◽  
pp. 19-21 ◽  
Author(s):  
W. Hermel ◽  
S. Siegel ◽  
S. P. Oshkaderov ◽  
L. O. Andrushchik ◽  
V. A. Shvitai ◽  
...  
Keyword(s):  
Powder Materials ◽  
Electric Contact

Research of Electric Contact Welding by a Wire at Restoration of Details of Cars

2021 ◽  
Author(s):  
Dmytro Marchenko ◽  
Aleksandr Dykha ◽  
Kateryna Matvyeyeva ◽  
Viacheslav Kurepin
Keyword(s):  
Electric Contact ◽  
Contact Welding
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