Research On Air-wake Of Large Diameter Non-metallic High-speed Disk

Adoption of smart grid is an inevitable trend of modern grid development. The good performance of the smart grid of customer premise equipment is a necessary to ensure the smooth implementation of the smart grid. The conventional sensor response frequency detection device not only need a large investment, high cost, lower precision, but also can not solve the detection problem if the operating frequency higher than 9000 HZ,in view of this king of problem,our group develop the smart grid user side of intelligent detection system for operating frequency of approach switch,which is not only greatly improve the range of frequency detection, but also quickly adapt the smart grid user side of intelligent detection’s market demand. As the core components of large diameter non-metal high speed disk, the aerodynamics and temperature distribution problem of the smart grid user side of intelligent detection system will directly related to the deformation and failure of the disk. So, there is a significant theoretical and practical significance for analyzing the air flow field of large diameter no-metal high speed disk to the study of smart grid user side of intelligent detection system.Firstly, mathematical model of air flow field 、 numerical simulation theory and numerical simulation processes were introduced, through the Fluid-solid coupling method,the large diameter non-metal high speed disk were numerical Simulated, which distribution regularity of velocity field, pressure field and stress-strain field were analyzed in this article. Secondly, it reveals influence and influence degree of the maximum equivalent stress and deformation about different parameters of disk speed, outer diameter, thickness,diameter of pallet and disk height on the large diameter non metallic high-speed disk.Finally, the disk of thermodynamic equation were established, according to the thermal parameters for solving steady-state thermal and transient thermal simulation intended disk,the distribution of temperature field and different process parameters of non-metallichigh-speed large-diameter disk of the degree of influence on the peak temperature were analyzed.The conclusion shows that: Accretion disk rotational speed, the maximum equivalent stress value and amount of deformation will increase, the peak temperature of pneumatic heat generation generally increased, at the speed of 4000 RPM, the maximum equivalent stress value is 1.58 MPa, the deformation amount is 18.27 mm and the peak temperature increase 22℃ to 63.2℃.The maximum equivalent stress value and amount of deformation is increasing with outer diameter by two times curve, the peak temperature increases slowly, until to the 800 mm the temperature rise very fast, the outer diameter is 850 mm, the peak temperature reaches 82.8℃.When the disk thickness and the tray diameter increases,the maximum equivalent stress numerical curve of force and deformation of a downward trend, peak temperature changes a little. With the increasing of the outer wall height,the maximum equivalent stress value and the deformation is first increased and then decreased,the wall height is about 950 mm achieve maximum value. Through the analysis of the disk influence degree about maximum equivalent stress and deformation indicate that the maximum influencing factors is the outer diameter, followed by the rotary speed of the disk and the outer wall height, less impact on the maximum equivalent stress and deformation about thickness and pallet diameter. At the same time, through the analysis of parameters on the peak temperature known that the disk speed influence biggest, next of the outer diameter, the last of the disk thickness.