A winding packing and non woof belt method at rotating electromotor end

Abstract

The invention relates to a method of circumgyrating motor end winding laid band, it characterized in that: heating the laid band, the method is: armature is mounded on the machine tool; the laid band is strapped as it is rotated on end part of the armature loop; adopting calorifier to heat laid band directly; the advantages of the invention are that quantity of glue of laid band on loop end part can not be lost.

Description

technical field [0001] The invention relates to a method for wrapping the end of a rotating electrical machine with a weft-free tape, which can be used for a rotating armature generator and belongs to the technical field of generators. Background technique [0002] For rotating armature motors, the armature windings are usually embedded in the slots of the armature core. According to the structural characteristics of this type of motor, its end structure needs to be fixed to meet the requirements of the following three aspects: 1) electrical insulation; 2) mechanical strength; 3) can firmly fix the end of the armature coil. Especially in terms of mechanical strength, the centrifugal force borne by the end structure during rotation is proportional to the square of the diameter, that is, as the diameter increases, the force on the fixed end structure increases with the square of the diameter. This is a very important parameter for high-speed, long-term operation. [0003] In...

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Problems solved by technology

It is feasible in principle, but there are two fatal weaknesses in actual engineering, one is that after leaving the drying room, the wrapping temperature drops nonlinearly with the ambient temperature, and the other is that it is impossible to heat the temperature to a considerable high , although it is possible to add some auxiliary thermal insulation measures such as hot air blowers, but with the accumulation of tension and the temperature rise of the entire wrapping part during wrapping, the epoxy resin contained in the bottom latitude-free tape will have a certain degree of fluidity And as the wrapping tape floats on the top, because the epoxy resin contained in the non-weft tape has fluidity at a certain temperature, the glue content of the bottom non-weft tape will be lost, which will bring hidden dangers to the strength.

Another weakness is that due to the high temperature air flow of the hot air blower, it will bring abnormal difficulties to the operator, and it has considerable inoperability.

If the temperature is lowered to the range acceptable to the operator, although the epoxy resin contained in the wrapping will float on the surface of the hoop with the accumulation of tension, resulting in the lack of glue content in the bottom non-weft tape, but due to the low temperature , the weft-free tape itself is not viscous when it is actually wrapped, and the hoop wrapped before it is cured is actually a loose whole. When it enters the formal baking, the temperature required for the real curing of the epoxy resin does not immediately rise to the required temperature. The required temperature is a slow process, during which as the temperature gradually rises, the epoxy resin contained in the latitude-free tape will gradually show its fluidity, which will also cause a considerable amount of colloid to overflow and lose

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