Source: China Industrial Economy Information Network
Recently, the 1100mm diameter spiral screen centrifuge developed by Nanjing New Screening Technology Industry Co., Ltd. has officially left the factory and been delivered for use. Its various indicators meet the standards of imported CX1100 models. The development of this centrifuge has solved the problem of long-term dependence on imports for key components of such equipment, and achieved the localization of the entire machine.The general manager of the company, Cheng Xuefei, stated that large centrifuges used in the domestic soda ash and potassium fertilizer industries have been monopolized by foreign companies due to high manufacturing difficulties, complex processes, and core technology lockdowns. The higher the accuracy of the differential, a key component of a centrifuge, the better its adaptability to materials. Previously, domestic enterprises had been constrained by the inability of large-scale centrifuge specialized differential assemblies to be domestically produced.
The key points for designing the differential of a large centrifuge can be summarized as follows: firstly, the design life for continuous operation should reach over 40000 hours; secondly, the output torque should exceed 27000NM and the design speed should exceed 3000rpm; thirdly, it should meet the comprehensive operating conditions of high temperature, humidity, high vibration, high torque impact, and corrosiveness. "Cheng Xuefei summarized that the selection of raw materials, production and manufacturing, heat treatment processes There must be extremely high requirements for the coordination and assembly process of each component.
The R&D team of Nanjing New Screening Company has independently developed a large differential through repeated experiments and research, with performance reaching the level of imported equipment from abroad. Moreover, under complex operating conditions, the service life is extended by more than 50% compared to imported components.
After successfully producing the first large centrifuge differential in 2012, the company also produced a spiral screen centrifuge with a diameter of 1000mm in 2016. This year, they built on the original foundation and produced a spiral screen centrifuge with a diameter of 1100mm, while also achieving the localization of the entire machine.
The spiral screen centrifuge series developed by the company is a fully automatic centrifuge with continuous feeding and discharging. Cheng Xuefei introduced that the 1100 model adopts a modular design, mainly composed of four parts: hydraulic unit, drive unit, overcurrent component unit, shell, and frame unit. Its core components use professional analyzers to detect materials and accuracy, striving for excellence in each component.
Dynamic balance is a key indicator for testing the smoothness of a centrifuge. We have adopted a high-precision dynamic balancing machine with a precision of G6.3 level standard, and the imbalance of each component is less than 1mg, "Cheng Xuefei said. (Peng Yanwen/Image)
Transferred from: China Chemical Daily
