Papers by Author: Shuang Liang

Abstract: Nowadays the global ecological and environmental problems have become increasingly prominent. Land deterioration seriously restricts the regional development of society and economy and threats to the survival of humans. We carried out a series of experiments on ecological restoration of melilotus offcinalia in various types of environment like strong saline-alkali land, barren land and mine land for the first time. The comparison of soil indexes between restoration soil and background soil shows that melilotus offcinalia can removal off salinity and base of the strong saline-alkali soil and increase the nutrient contents in various types of soil. Moreover, melilotus offcinalia can improve physical properties of soil, which will increase the land coverage and improve land productivity. Consequently, melilotus offcinalia can be promoted in stages for soil amelioration and ecological restoration in various types of ecological environment.

Abstract: In order to improve the attenuation ability of grinding wheel spindle and manufacturing quality of workpiece, an ultrahigh speed grinding spindle system with a SFD was designed based on the theory of squeeze film damping, and a series of experiments were done. The study results show that the application of SFD technology can effectively restrain vibration which is caused by the imbalance quality when the grinding wheel spindle turning at ultrahigh speed. And the speed of the grinding spindle is higher and the effect of attenuation of SFD to grinding spindle is better. Research works provides a new technology for the design of the ultrahigh speed grinding spindle system.

Abstract: The operation principle of SFD and the center moving orbit of grinding wheel spindle which under the operation of SFD are studied. Based on the theoretical research, the experiment is studied and analyzed. The study results show that the application of SFD technology can effectively restrain vibration which is caused by the imbalance quality when the grinding wheel spindle turning at ultrahigh speed. And it can remarkably improve the working quality and work efficiency of ultra high-speed grinder.