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随着高新工业科技的发展,燃气轮机的发展已从小功率发展到300MW级,燃机对油品质的标准要求高问滑油要求达到NAS6级、顶轴油和控制油要求达到NAS5级,为保证燃机运行中油品质的要求,介绍了根据系统的布置,选取了最佳的冲洗方案和保证油品质的关键点,保障了机组的安全稳定运行。 相似文献
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Ground textures seriously interfere with the exact identification of grinding damage. The common nondestructive testing techniques for engineering ceramics are limited by their difficulty and cost. Therefore, this paper proposes a global image reconstruction scheme in ground texture surface using Fourier transform (FT). The lines associated with high-energy frequency components in the spectrum that represent ground texture information can be detected by Hough transform (HT), and the corresponding high-energy frequency components are set to zero. Then the spectrum image is back-transformed into the spatial domain image with inverse Fourier transform (IFT). In the reconstructed image, the main ground texture information has been removed, whereas the surface defects information is preserved. Finally, Canny edge detection is used to extract damage image in the reconstructed image. The experimental results of damage detection for the ground texture surfaces of engineering ceramics have shown that the proposed method is effective. 相似文献
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