等距噴頭 的英文怎麼說
中文拼音 [děngjùpēntóu]
等距噴頭
英文
djpt-
This charged fiber can be directed or accelerated by electrical forces and then collected in mats or other useful geometrical forms. the diameters of electrospun fibers are in the range of tens of nanometers to several micrometers. in this paper, polyacrylonitrile ( pan ) nanofibers are made by electrospinning pan / dimethylformamide ( dmf ) and pan / dimethylacetamide ( dmac ) with adjusting the main process parameters including electrostatic voltage ( 20 ~ 50kv ), sprinkler aperture ( 0. 5 ~ 0. 8mm ), collection distance ( 15 ~ 25cm ), solution concentration ( 6 wt % - 14 wt % )
本文主要對聚丙烯腈（ pan ）二甲基甲酰胺（ dmf ） 、 pan二甲基已酰胺（ dmac ）體系進行電紡絲，調節靜電壓（ 20 50kv ） 、噴頭孔徑（ 0 . 5 0 . 8mm ） 、接收距離（ 15 25cm ） 、溶液濃度（ 6wt 14wt ）等過程參數，制得pan納米纖維，纖維平均直徑在200 1000nm ；詳細分析了過程參數對纖維細度、形態等的影響，認為高聚物溶液濃度及靜電壓對纖維細度有決定性影響，其它過程參數如接收距離、噴射孔徑、紡絲溶液溫度、溶液電導率等的調整應以這兩參數為基礎進行。Studies have shown, lead impeller nozzle it forms the hole to be equal to size of the nozzle, gush out from light, difficult to arrange bits and realize it cut one layer of advantages effectively ; under the equal condition, rotate the nozzle by oneself, can be designed in accordance with the actual need while vary the size of aperture of hole, gush out the distance longer effectively, it is apt to give play to the role of its pulse broken rock
以此設計出限速部分的參數，且初步討論射流功率與轉速之間的關系。研究表明，內導葉輪噴頭形成鉆孔孔徑與噴頭大小相當，有效噴距小，不易排屑和實現其切向剝層優勢；同等條件下，自旋轉噴頭，成孔孔徑大小可依實際需要設計，有效噴距較長，易於發揮其脈沖破巖作用。And draft the on - the - spot experiment through the indoor experiment, every parameter of the lead impeller nozzle such as efflux pressure, target distance, attack time parameter to hole influence is analyzed
通過室內實驗和擬現場實驗，設計內導葉輪噴頭，分析內導葉輪噴頭各參數及射流壓力、靶距、打擊時間等參數對鉆孔作業的影響。2 ) a simplified sprinkler system which is composed of water source, pipeline pump, pipes, current of water display, nozzle, contral valve, is suitable for our country. and its water is supplied by gravity tank or gravity tank or hydrant system or city 3 ) spray intensity of simplified sprinkler system is 3 l / min. m2, protection area of them is 50m2
3 ）簡易自動噴水滅火系統的噴水強度為3 / min . m2 、保護面積為50m2 、噴頭的安裝間距為3 . 7m等參數。 4 ）簡易自動噴水滅火系統最大設計動作噴頭數為四隻，供水時間宜為30min等。分享友人