GRANULATION METHOD AND DEVICE FOR CROSSLINKED POLYETHYLENE CABLE INSULATING MATERIAL HAVING VOLTAGE GRADE OF 500 KV OR MORE
개요
출원인
ELECTRIC POWER RESEARCH INSTITUTE. CHINA SOUTHERN POWER GRID
발명자
Shuai HOU; Mingli FU; Lei JIA; Lingmeng FAN; Yunpeng ZHAN; Wenbo ZHU; Baojun HUI; Bin FENG; Jie LIU
IPC 분류
CPC 분류
Granulation method and device for crosslinked polyethylene cable insulating material having voltage grade of at least 500 kV are provided. The method includes: controlling melt extrusion system to melt insulating material; directing the melt into melt gear pump through first branch flow channel; measuring pressures at inlet and outlet of the melt gear pump, and calculates first pressure difference Δp; rotational speed of melt gear pump is adjusted such that Δpapproximates to 0; measuring pressures at inlet and outlet of capillary mold, and calculate second pressure difference Δp; volume flow rate Q of the melt flowing into capillary mold is obtained based on number of steps of rotation of melt gear pump; shear rate, shear stress and shear viscosity η of the melt are obtained based on Q and Δp; and adjusting process parameters, adjusting η to obtain adjusted η′, and causing η′ to be within processing-suitable viscosity range.
원문 (중국어)
Granulation method and device for crosslinked polyethylene cable insulating material having voltage grade of at least 500 kV are provided. The method includes: controlling melt extrusion system to melt insulating material; directing the melt into melt gear pump through first branch flow channel; measuring pressures at inlet and outlet of the melt gear pump, and calculates first pressure difference Δp; rotational speed of melt gear pump is adjusted such that Δpapproximates to 0; measuring pressures at inlet and outlet of capillary mold, and calculate second pressure difference Δp; volume flow rate Q of the melt flowing into capillary mold is obtained based on number of steps of rotation of melt gear pump; shear rate, shear stress and shear viscosity η of the melt are obtained based on Q and Δp; and adjusting process parameters, adjusting η to obtain adjusted η′, and causing η′ to be within processing-suitable viscosity range.