回转的

Based on the reasonable simplification and assumption for slewing ring in mechanical engineering, calculating the pressure on unit length of arc at any angle of raceway under different loads of slewing ring .

在对工程机械中常用的回转支承装置进行合理的简化和假设后，根据其受力状况，分别计算出作用在回转支承上的各种载荷对滚道圆周上任意角处单位弧长上所产生的压力，最后应用压力叠加的方法，推导出回转支承装置摩擦阻力矩的计算公式。

The combined motion of grinding the transition arc maintains that the gyration center of the arc moves along the parallel line to the surface of the grinding wheel, and the gyration center of the oxide tool moves along the vertical line to the surface of the grinding wheel.

磨削刀片过渡圆弧时，过渡圆弧的回转中心到砂轮面的距离必须恒等于过渡圆弧的半径，磨削过渡圆弧的复合运动要保持过渡圆弧的回转中心沿平行于砂轮面的直线运动；刀片的回转中心沿垂直于砂轮面的直线运动。

According to actual condition, a model of wall thickness of rotary kiln is established. The constant coefficients in the model, including thermal conductivity, heat transfer coefficient, Fourier coefficient and contact resistance, are closely calculated. A formula of contact resistance is draw from a great deal of data of surface and inner temperature of rotary kiln. The wall thickness of rotary kiln is simulated by MATLAB. The simulation result is transmitted from MATLAB to DELPHI through a group of interface functions compiled by VC++. The basic graphs-circle and line are analyzed by the means of the technique of Visualization in Scientific Computing and the Bresenham arithmetic, and are realized the visualization of the wall thickness. The contents of communication between master computer and slaver computer are designed and the error control technique, the idea of multi-thread and the embedded assembly language are applied to realize the temperature data transmission and graph transmission, which largely improved the speed of transmission and the reliability and stability of system.

建立了符合现场实际的回转窑壁厚数学模型；结合现场采用红外测温仪测量所得的温度数据和回转窑的实际结构数据，确定出适合该模型的定常系数(包括导热系数、换热系数、傅立叶系数、接触热阻等)，并得出与回转窑工况的相近的接触热阻公式ln=T~(0.5154)-36.7868；利用MATLAB软件仿真出回转窑壁厚，并将运算结果通过在VC++的编译环境下编译出MATLAB和DELPHI的接口函数传输到该监测系统中，实现了温度数据的转换和交换；运用科学计算可视化技术和Bresenham扫描转换算法对基本图形——圆和直线进行分析，从而实现了仿真后的壁厚数据可视化；在研究异步串行通信方式的基础上，设计了该系统上下位机功能和通信内容，并运用差错控制技术、多线程思想以及嵌入式汇编语言实现了温度数据和图形数据在上下位机之间的远程传输，提高了数据传输的速率和系统的可靠性、稳定性。

Took the different diameters double-row bearing slewing ring asexample, this dissertation studied the distribution of axial press ofthe rolling body under axial load and throw moment, the contact pressbetween two outer seat-rings which are connected to the main machinewith high strength screw bolts.

本文以双排异径球式回转支承为例，对球式回转支承在承受轴向载荷和倾翻力矩时的滚动体轴向正压力大小、分布及由高强度螺栓与主机连接的滚圈接触面的接触力进行了详细的理论推导和实际计算，说明在双排球式回转支承的结构静力分析过程中，可以将滚圈安装接触面的接触力简化为铅垂方向的均布载荷。

Therefore, through the thermodynamic analysis and calculation of calcining active calcareousness rotary kiln in Pan Zhihua Steel Factory, the relationships among rotary kiln efficiency, output and gas-fired quantity could be concluded.

因此，本文通过对攀钢煅烧活性石灰回转窑进行了热力分析计算，得到了回转窑效率、产量、燃气量等之间的关系，通过对各影响参数的了解，可以掌握回转窑的热工制度，同时也可以掌握熟料的煅烧状况。

Pneumatic hammer drilling technology with low wob,low rate of revolution and high capacity to break rock is one of the best effective methods to solve the problems of hard rock drilling.It includes air drilling and rotary drilling technology,so its penetration rate is usually two or three times higher than rotary drilling.

空气锤钻井是一种低钻压、低转速、高冲击破岩回转钻进技术，它兼容了气体钻井和冲击回转钻井的优势，其机械钻速一般比回转钻井高，是当今解决硬岩钻井难题的一种有效方法。

The performance of a pilot plant with 10 kt/a kiln-method phosphoric acid is discussed: melted temperature of the ball, binders choice, kiln equipment, heat recovery and how to increase P2O5 transformation rate, especially to the scars sticked to the kiln inner wall and material block. The author insists that the CDK kiln phosphoric acid facility is unsuitable for easy construction.

介绍回转窑窑法磷酸1万t/a工业磷酸试验装置的试生产情况，对试验装置的有关问题(料球的软熔温度与黏结剂的选用，回转窑设备与热能利用，如何提高磷矿中P2O5还原率)进行讨论，特别对解决回转窑结圈堵料问题提出了很好的建议并认为目前CDK窑法磷酸还不适宜盲目建设

During air drilling,under the precondition of high drilling speed, pneumatic hammer drilling technology can validly control the well deflection.

空气锤钻井是一种低钻压、低转速、高冲击破岩回转钻进技术，它兼容了气体钻井和冲击回转钻井的优势，其机械钻速一般比回转钻井高，是当今解决硬岩钻井难题的一种有效方法。

Good mixing with air is necessary for high DRE of hazardous wastes with high heat value.Experiments on mean residence time in rotary kiln were executed and model of axial transport in rotating drum was built. Feed rate was firstly introduced into the practical equation for MRT when the holdup is less than 10%.

对影响回转窑内物料颗粒运动特性的因素进行了试验研究，发现在较低的回转窑填充率工况下，给料速率F对固体物料平均停留时间MRT有着较大的影响，首次在现有的回转窑内固体物料平均停留时间NRT计算经验公式中加入了影响因子给料速率F的影响关系。

Since our successful invention of the single-row ball slewing ring in 1984,which ranks in the international advanced level, we have also developed and produced three other types of slewing rings:three-row roller slewing ring,cross-rolling slewing ring and two-row roller slewing rings,altogether four types of slewing rings,amounting to more than 800 specifications.

公司生产单排球式、三排柱式、交叉滚柱式和双排球式四大系列的回转支承共八百多个规格，公司生产的回转支承系列产品批量出口到美国、加拿大、日本、意大利，东南亚和中东等多个国家和地区。2005年公司出口回转支承2099套，其中出口美国1774套，占公司全年销售量的13%。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。