Pouring sealant for potting of torque motor rotor and pouring method

Abstract

The invention relates to a pouring sealant for the potting of a torque motor rotor and a pouring method. The pouring sealant is prepared from the following raw materials in parts by weight: 10 parts of epoxy resin; 7-10 parts of a curing agent of epoxy resin; 5-15 parts of a filler of the epoxy resin adhesive; 1.5-3 parts of an epoxy toughening agent; and 0.02-0.08 part of an accelerant. The method comprises the following steps of: 1, mounting and fixing a motor rotor into a potting mold; 2, putting the rotor arranged in the mold into a drying oven for preheating the rotor; 3, preparing the pouring sealant according to the proportion of each component; 4, carrying out vacuum defoaming treatment on the pouring sealant; 5, potting the torque motor rotor; 6, removing bubbles in the mold in avacuum environment; 7, putting the mold into an oven, carrying out thermocuring treatment, and cooling the mold along with the oven after curing; and 8, disassembling the potting mold, taking out thetorque motor rotor, and machining to remove redundant sealant outside the rotor. With the pouring sealant and method of the invention adopted, the problems of cracking of the pouring sealant and cracks between the pouring sealant, a punching sheet and a shaft sleeve are solved.

Description

technical field [0001] The invention belongs to the field of torque motor assembly, and relates to a potting technology for a torque motor rotor, in particular to a potting glue and a potting method for potting a torque motor rotor. Background technique [0002] Epoxy resin potting treatment on the motor rotor can not only strengthen the integrity, fix the winding structure and commutator structure, avoid direct exposure of components and windings, but also improve the impact resistance, enhance the insulation between windings, and improve the waterproofing of devices , Moisture-proof performance. The torque motor rotor contains a variety of parts: enameled wire, commutator, rotor punch, shaft sleeve, etc. The materials of various parts are different. When the various materials are potted together, under high and low temperature cycles (-55°C to 70°C) and rapid temperature changes (such as a 70°C motor being placed in an environment of -55°C for an instant), the adhesive la...

AI Technical Summary

Problems solved by technology

When the various materials are potted together, under high and low temperature cycles (-55°C to 70°C) and rapid temperature changes (such as a 70°C motor being placed in an environment of -55°C for an instant), the adhesive layer itself is prone to cracking Or the problem of cracks between the adhesive layer and the punching sheet and the bushing

Images