2results about How to "Avoid burial" patented technology

This invention discloses a method for preparing a superhydrophobic drag-reducing coating and its application in a manta ray-inspired submersible prototype, belonging to the technical field of underwater drag reduction and surface functional materials. The method includes: dispersing micron-sized SiO2 and nano-sized SiO2 in ethyl acetate to obtain a first dispersion; dispersing PDMS in ethyl acetate to obtain a second dispersion; mixing and stirring the first and second dispersions, then adding a curing agent and long-chain perfluoroalkyl silane PFDTES, followed by spraying and curing to obtain a PFDTES-PDMS@SiO2 coating. This invention achieves a water contact angle >150° and a roll-off angle <9° through the synergistic effect of PFDTES long-chain fluorination modification, PDMS flexible bonding, and the micro / nano dual-scale SiO2 hierarchical structure. In the manta ray-inspired submersible application, a drag reduction rate of 14.43% is achieved at a flow rate of 0.5 m / s, and the performance remains stable after 24 hours of dynamic water flow impact. This invention features a simple process, controllable cost, and is suitable for drag reduction functionalization of complex curved underwater equipment.

The utility model discloses a loess landslide physical simulation test device, including simulation test device main part, the soil recovery groove and the roof are installed on simulation test device main part, the roof below is installed with the inclined plane board, and the inclined plane board is located soil recovery groove top, is equipped with the suspension mechanism on the inclined plane board, including the front lift rod and rear lift rod, the utility model discloses, introduce the suspension mechanism in loess landslide simulation test system, after simulation test official start, use suspension mechanism and carry the inclined plane board of loess of test to the established simulation slope position of promotion, for the reliability and stability of guaranteeing the adjustment component in the test process, the adjustment component scientific and reasonable setting is in the upper area of inclined plane board, through this layout mode, when loess landslide phenomenon, can effectively prevent the loess that slides to the adjustment component formation bury, avoid the operation failure of adjustment component due to loess bury, thereby ensure that the whole simulation test can be according to the preset scheme accurately, orderly advance.