RESEARCH OF PHYSICOMECHANICAL PROPERTIES OF ISOLATION OF TRACTION CARS AT VARIOUS INFLUENCES
Are defined humidity of electrical insulation materials which it is very important for specification of conditions under which test of electric properties of elktroizolyatsionny material is made. Besides, for much hygroscopic materials which acceptance and delivery happens on weight determination of humidity is very important for strict accounting of amount of material. Data on fragility, hardness and impact strength of the electroinsulating materials playing an essential role at long operational influences are provided. It is shown that with other things being equal the speed of thermal aging of organic and elementoorganichesky polymers considerably increases with aging temperature increase, submitting to the general regularities of temperature change of speed of chemical reactions. Case isolation of traction engines of electric locomotives and locomotives is the most loaded element. It at the same time is affected by electric field, temperature, thermomechanical tension, electric efforts. Advantages of many fibrous materials: low cost, quite big mechanical durability and flexibility, convenience of processing. Shortcomings them are the low electric durability and heat conductivity (because of existence of intervals between the fibers filled with air); the hygroscopicity is higher, than at massive material of the same chemical composition (as the developed surface of fibers easily absorbs the moisture getting into intervals between them). Properties of fibrous materials can be significantly improved by impregnation why these materials in electric isolation usually apply in the impregnated state.