The design of the transmission typed planetary gear power - shafted , is confirmed to cater to the request of design of the whole machine by the confirmation of the travel gear , the matching of the engine , the transmission and torque converter , the suitable transmission ratio of the transmission 对行星式动力换档变速箱的设计研究，是通过对整机行驶档位的确定，发动机和变矩器及变速箱的匹配，找到合适的变速箱的传动比，使其满足整机的设计要求。
Firstly , the mechanism of the preparation of superfine quartz powder with ball mill is studied in this article , based on nature of quartz material , griffith ' s strength theory and the crush theory of planetary ball mill . the problem of granulation during the process of the preparation of superfine quartz powder is studied minutely . and proposed increasing dispersant and disperser medium to restrain granulation , and dispersing use ultrasonic after milled 首先,本文结合石英材料的基本物性,以格里菲斯强度理论和行星式球磨机的粉碎原理为基础,研究了球磨法制备超细石英粉体的机理,同时对粉石英制备过程中的团聚问题及其控制作了细致的研究,提出粉磨过程中增加分散剂和分散介质来抑制团聚,粉磨后采用超声法进行分散,并确定了最佳分散剂、分散介质的用量和最佳超声分散时间。
Nano - composite nd2fe14b / - fe magnetic material has been prepared by mechanical milling nd2fe14b alloy under ar2 and subsequent crystallization at different temperature . effect of ball milling ( attritor mechanical milling and planetary mechanical milling ) and crystallization technique on structure and magnetic of nanocomposite nd2fe14b alloy has been analyzed by xrd , sem , tem and ppms 通过x射线衍射( xrd ) 、扫描电子显微镜( sem ) 、透射电子显微镜( tem )和物理性能测试系统( ppms )着重研究了不同球磨工艺(搅拌式球磨与行星式球磨)及晶化处理工艺参数对纳米复相nd2fe14b合金组织结构和磁体性能的影响。
We are the exclusive producer of the planetary tube and pipe cutting machine in china . by totally eliminating problems occurred frequently in competitors product , such as pipe deformation , burring , and slant cutting , our machine is suitable for cutting almost all kinds of metal pipe and shows outstanding advantage , especially for thin - wall stainless steel pipe . these advantages make it the best choice for manual tig , wig welding , and orbital welding 公司本次特推出行星式切管机，国内唯一，适用于几乎所有金属管道的切割，特别是对薄壁不锈钢管的切割，其优点尤为突出，克服了一般切割机管道易变形毛刺多切口不垂直的缺点，是统一配套的手工氩弧焊机管管焊机的唯一正确选择。
Based on the experimental results and the correlative chemistry theory , the phases formed in the process and its influenceable factors were studied . the significant results were enumerated as follows : as for the mn - h2o system , 5g pure mn scraps ( 99 . 5 % , - 200mesh ) and distilled water served as the starting materials were milled by high energy ball miller together with 200g steel balls as the milling medium . the experiments were conducted with the rotation speed of 380rpm . - mn3o4 nanopowders were fabricated after milling some time and would experienced phase transformations if continue to be milled . the reaction would be accelerated if a little of hcl or mnso4 was added while be decelerated if . a little of naoh was added . the - mn3o4 phase with particl size between 20 ~ 100 nanometer was obtained after milling 1 . 5h when trace hcl was added . the oxygen added to the ball tin has little effect on the reaction 主要实验结果如下: ( 1 )对于mn - h2o系,通过高能行星式球磨机,在50ml蒸馏水中球磨5gmn粉末,球料比为40 : 1 ,转速为380rpm ,球磨一定时间后获得了纳米级单相- mn3o4 。随着球磨时间的延长,生成的- mn3o4会继续被氧化或发生晶型转变。加入微量hcl或mnso4会明显加快mn的反应,加入hcl后,球磨1 . 5h后即获得粒径为20 100nm的单相- mn3o4粉末;加入微量的naoh会抑制mn反应生成- mn3o4 。
