高浊度微污染黄河水的处理工艺

在混凝处理中采用5%的清水回流与PAC+HPAM联合投加相结合的方法,形成高浊度微污染黄河水的处理工艺。应用该技术对高浊度水进行生产性试验,除浊效果与传统工艺相比约提高40%～50%,对有机物和NH3-N的去除率也有所提高,同时可使出水的致突变活性呈阴性。     

橡胶模型制品胶坯精密预成型机

介绍了橡胶工业橡制品生产中胶坯制备的三种方法，其中详细介绍了精密预成型机制备胶坯。以上海德仁橡塑机械有限公司物精密预成型机为例，从结构，性能及工艺参数等方面进行了分析，说明精密预成型机是批量生产橡胶模型制品的一种得力辅助设备。     

Design of a new type of mine rescue relay cabin

This paper presents the design of an innovative mine emergency rescue relay cabin, and investigates a detailed comparison of existing shelter facilities, their function, service object, structures, size, and system components with the newly designed mine emergency rescue relay cabin. Air-tightness test indicated a test chamber relief rate of 26 Pa/min, which meets the design requirements. Furthermore,respirator replacement test showed an average time of 73.7 s to replace a respirator. The air cover air supply test indicated an air supply rate of 220 L/min, which is sufficient for the staff replacing the respirator in the emergency rescue relay cabin. The total air supply volume is 9680 L, which can be supplied via two compressed air cylinders of 40 L, pressurized to15 MPa.     

混菌固态发酵小曲白酒糟生产蛋白饲料的研究

以小曲白酒糟为原料,添加纤维素酶制剂预处理原料,采用白地霉、假丝酵母混菌固态发酵,生产蛋白饲料。确立了糟麸比、纤维素酶预处理方式、初始pH值、初始含水量、料层厚度、发酵时间和温度。对发酵产品的分析表明：粗蛋白增幅87．5％,粗纤维降解率达20．1％,粗脂肪降解率为61．81％。     

等离子喷涂送粉参量对粉末粒子运动行为的影响分析

为研究等离子喷涂设备送粉参量变化对粉末粒子运动行为的影响,通过数学计算给出了粉末粒子初速度及运行轨迹的一些解析计算结果.结果表明粉末粒子喷出初速度随送粉气流量的增大呈线性增大,随送粉管直径增大呈指数减小,而且与密度和粒径的指数幂成反比关系.当粉末粒子粒径为75μm时,Ni金属粉末的最佳送粉参量为:送粉气流量0.2m3/h,送粉管直径1.5mm;Al2O3陶瓷粉末最佳送粉参量为:送粉气流量0.3m3/h,送粉管直径1mm.该项研究工作为选择最佳送粉参量和控制粉末粒子在等离子流场中的运动提供了依据.     

Investigation of Creep Feed Grinding Parameters and Heat treatment Effects on the Nickel-base Superalloys

The Nickel base Superalloys are the most famous complicated and useable of Superalloys to make hot zone components of the gas turbines. The complicated dimensional tolerances, specially at the root of the blade show importance of grinding processes at the production of blades root. The prediction of the effect of machining parameters on the soundness of component surface strengthening for reaching to a suitable surface finishing and avoiding from crack formation at the work part during machining operation often is not easy and feasible so needs to more industrial investigation.This research is about frame 5 blade designed by GE and made from Superalloy IN738LC has been investigated. The formation of a plastically deformed and heat affected zone during grinding of Superalloy IN738LC with a high depth of cut but slow work speed (creep feed grinding) was investigated. Parameters such as work speed, depth of cut and radial dressing speed have been considered as variables and their effects have been studied. During experimental performed, the voltage and current of motor measured and power and special energy calculated.Some samples heat-treated (of the 1176℃ for 1 hr under neutral argon gas and cooling rate of 15℃/min up to 537℃ and then air cooling) to study grains recrystallization. Other samples have been created from the roots of blades and then coated by Nickel to measure boundary layer micro-hardness. The results show that increasing work speed leads to increasing the use power. Increasing the depth of cut, by increasing material removal rate, and the radial dressing speed, by decreasing power, lead to decreasing special energy. The temperature created by grinding lead to decreasing plastic deformation and boundary layer formation. When the radial dressing speed changes from 1 to 0.6μm/rev and other parameters are kept unchanged the roughness of surface increases and the special energy decreases. Sufficient dressing is very essential in limiting the width of the molten zone to few micrometers. As a result, it was found that local melting at contact spots to be a rather common mechanism during grinding of superalloys, lead to so-called white layers which can easily be observed on metallographic cross sections.     

基于局部间隙状况电火花磨削周期的伺服策略

分析了现有的一些电火花磨削伺服策略存在的问题，提出了基于周期性和局部性特点的伺服策略。该策略以回转周期为控制周期，以局部间隙状况为控制的依据，通过极端局部间隙状况控制极端局部表面加工状态，从而控制整个表面优质高效的加工，具有快速修圆和一定的自动寻优功能。     

双回转送进二辊冷轧管机凸轮设计研究

本文提出了双回转送进二辊冷轧管机凸轮理论轮廓曲线的新设计方法 ,其轮廓曲线加速度与跃度呈梯形 ,且跃度边界连续 ,给出了针对双回转送进二辊冷轧管机的两个过渡段具有等加速度和跃度的设计准则     

龙门刨床自动进刀控制系统的设计

本文针对龙门刨床机械式进刀量控制机构的结构特点,采用PLC为主控制器,以变频器作为控制电源,结合变速箱传动机构,研制了一种龙门刨床刀架自动进给控制系统。实践表明该系统设计先进,操作方便,运行可靠,性价比高,可移植性强,可广泛应用于各种机床刀具进给系统的电气改造。     

十八胺用于热力发电机组停用保护技术进展

对十八胺在热力发电机组停用防腐保护中的应用技术作了回顾，对新发明的固体十八胺乳化加药装置作了技术经济对比分析，认为具有安全、方便、经济、易标准化的优势。