Abstract: Disclosed are a corona-resistant N-grade insulation paper for a variable frequency motor and a preparation method thereof. The insulation paper has a sandwich structure, aramid nanofibers and mica nanosheets are taken as a sandwich material of the sandwich structure, aramid nanofibers and silicon carbide nanowires being taken as upper and lower surface layer materials, and three layers of materials are electrostatically sprayed and thermo-compressed to prepare the insulation paper. According to the present disclosure, by introducing mica sheets and the silicon carbide nanowires into the aramid nanofibers, the highly ordered arrangement inside the sandwich structure is realized through electrostatic spraying, which improves the temperature resistance and corona resistance of the insulation paper.

Abstract: A composite insulating material based on dielectrophoretic force orientation and its preparation method are provided.

Abstract: A silicone rubber composite heat dissipation pad and a preparation method thereof are provided. The method includes: dispersing hydroxyl-functionalized boron nitride nanosheet powder into deionized water, pouring it into a specialized container, pre-freezing it using liquid nitrogen, and then freeze-drying it to obtain a boron nitride nanosheet skeleton arranged in a horizontal direction; uniformly dispersing thermochromic nanoparticles in acetone to obtain a dispersion, mixing the dispersion with liquid silicone rubber and stirring until acetone is completely evaporated, then adding a curing agent to obtain a liquid silicone rubber pre-cure solution; pouring the liquid silicone rubber pre-cure solution into a container containing the boron nitride nanosheet skeleton, so that the liquid silicone rubber pre-cure solution is fully immersed in an interior of the boron nitride nanosheet skeleton; and then curing is carried out by elevating the temperature to obtain the heat dissipation pad.

Abstract: A mobile-type maintenance square-shaped bin including a bin body, a travelling mechanism provided under the bin body, a car head connected with one end of the bin body, an inlet and an outlet provided at the other end of the bin body, a sealed door provided on the inlet and the outlet, an allocation and transportation device mutually connected with a microcomputer signal provided at a front end of the bin body as well as provided over an internal portion of the bind body, an maintenance platform provided at a bottom of the internal portion of the bin body, a tool platform provided adjacently to the maintenance platform, an ash-removal mechanism provided at an upper portion of the maintenance platform, an air-conditioning device provided at an outer portion of the bin body, and a scanning mechanism provided at a front portion of the maintenance platform.

Abstract: A mobile-type maintenance square-shaped bin including a bin body, a travelling mechanism provided under the bin body, a car head connected with one end of the bin body, an inlet and an outlet provided at the other end of the bin body, a sealed door provided on the inlet and the outlet, an allocation and transportation device mutually connected with a microcomputer signal provided at a front end of the bin body as well as provided over an internal portion of the bind body, an maintenance platform provided at a bottom of the internal portion of the bin body, a tool platform provided adjacently to the maintenance platform, an ash-removal mechanism provided at an upper portion of the maintenance platform, an air-conditioning device provided at an outer portion of the bin body, and a scanning mechanism provided at a front portion of the maintenance platform.