GB/T 894-2017轴用弹性挡圈Retaining rings for shaft
本标准规定了孔径d1=3 mm～300 mm的标准型（A型）和d1=15 mm～100 mm的重型（B型）轴用弹性挡圈，给出安装挡圈的沟槽设计数据。本标准适用于在轴上固定零件或部件（如滚动轴承）用可承受轴向力的弹性挡圈。...
The process analysis and improvement of the slender and flat shaft of track recorder
A slender and flat shaft is a key part of the track recorder in marine vessels. However, the axial straightness of the shaft often exceeds standard measurements after it is machined. It has also been found that its precision does not last a long time. After thorough analysis of these problems the main reasons that affect machining quality are identified-and a process modification plan is put forward that meets design requirements of the shaft. The production and practice indicate that the precision of the shaft is stable for a long period and the quality of products improved substantially after new measures were employed, securing the e accuracy of the track recording of the marine vessel....
Hybrid intelligent control of combustion process for ore-roasting furnace
Because of its synthetic and complex characteristics, the combustion process of the shaft ore-roasting furnace is very difficult to control stably. A hybrid intelligent control approach is developed which consists of two systems: one is a cascade fuzzy control system with a temperature soft-sensor, and the other is a ratio control system for air flow with a compensation model for heating gas flow and air-fuel ratio. This approach combined intelligent control, soft-sensing and fault diagnosis with conventional control. It can adjust both the heating gas flow and the air-fuel ratio in real time. By this way, the difficulty of online measurement of the furnace temperature is solved, the fault ratios during combustion process is decreased, the steady control of the furnace temperature is achieved, and the gas consumption is reduced. The successful application in shaft furnaces of a mineral processing plant in China indicates its effectiveness....
Simulation and Training Package on Corex Process
A software package has been developed for simulation on the Corex process. The simulation and training package on the process of shaft furnace using Corex off gas were introduced. The package consists of three main modules, namely the numerical simulation, the system modeling and optimization, and the training module, which are integrated with graphical interfaces. In addition, the equipment starting and stopping operation and typical trouble-shooting were also included in the package, whereby a practical environment can be established for training of operation and management stuff....
Gas Flow Distribution in Pelletizing Shaft Furnace
Through thermal test, cold state experiment, analysis and simulation of thermal process, the gas flow distribution in pelletizing shaft furnace (PSF) was discussed. The results show that there are five flowing trends; among them, the downward roasting gas and the upward cooling gas are the most unsteady, which influence flow distribution greatly. Among the operating parameters, the ratio of inflow is a key factor affecting the flow distribution. The roasting and cooling gases will entirely flow into the roasting zone and internal vertical air channels (IVAC), respectively, if the ratio of inflow is critical. From such a critical operating condition increasing roasting gas flow or decreasing cooling gas flow, the roasting gas starts flowing downwards so as to enter the inside of IVAC; the greater the ratio of inflow, the larger the downward flowrate. Among constructional parameters, the width of roasting zone b1, width of IVAC b2 and width of cooling zone b3, and the height of roasting zone h1, height of soaking zone h2 and height of cooling zone h3 are the main factors affecting flow distribution. In case the ratio of b2/b1, or h3/h2, or h1/h2 is increased, the upward cooling gas tends to decrease while the downward roasting gas tends to increase with a gradual decrease in the ratio of inflow....