Magnetic slot wedge and preparation process and application thereof

Abstract

The invention discloses a magnetic slot wedge and a preparation process thereof. The process comprises the following steps of: glue preparation: soaking iron powder with an alcohol solvent, adding phenolic resin, stirring into paste, soaking glass fiber cloth with the paste, removing the alcohol solvent, preserving heat at 80-100 DEG C for over 20 minutes, and cooling to obtain a glue-containing blank; 2, mold pressing: heating a mold to 100 DEG C, coating a mold releasing agent, putting the glue-containing blank into a mold cavity, performing mold closing, pressing to obtain a rubber fabric body, cooling the rubber fabric body till the temperature is below 120 DEG C and performing mold releasing; and 3, post-treatment: curing the rubber fabric body, preserving heat at 115-125 DEG C for 2-4 hours, then preserving heat at 135-145 DEG C for 2-4 hours, finally preserving heat at 155-165 DEG C for 2-4 hours, cooling to room temperature, and discharging to obtain the finished product. The magnetic slot wedge can be applied to a notch of a large or medium-sized motor, and has high and uniform magnetic conductivity; and the phenomenon of coil fall is avoided, the iron powder is preventedfrom being short-circuited, and therefore the performance of the large or medium-sized motor can be improved.

Description

technical field [0001] The invention relates to a magnetic slot wedge and a preparation process thereof, in particular to a magnetic slot wedge for large and medium-sized motor slots, a preparation process and application thereof. Background technique [0002] The magnetic slot wedges used in domestic large and medium-sized motors are not reasonable due to the rubber compounding materials and process methods. For example, iron wire is used as one of the base materials. If it is long, it is easy to generate heat due to short circuit of the iron wire, and then burn out the slot wedge. The damaged slot wedge causes the motor to fail and stop, and the user suffers a large economic loss. At present, the domestic metallurgical industry has stipulated that large and medium-sized motors must not use this kind of slot wedge. For another example, although some magnetic slot wedges have iron powder as one of the base materials, they are extruded (drawn) so the strength of the machine ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the defect that the existing magnetic slot wedges are not suitable for large or medium-sized motors, and provide a new magnetic slot wedge and its preparation process and application. The magnetic slot wedge of the present invention can be applied to In the notches of large or medium-sized motors, the coil can be firmly fixed, so that the coil will not fall off, and the magnetic permeability of the magnetic slot wedge is excellent and uniform, and the iron powder will not short-circuit, so it can improve the performance of large or medium-sized motors. Performance of medium-sized motors, such as reduced surface losses, improved power factor, etc.

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