3results about How to "Improve flow pattern" patented technology

The application discloses a method for rolling difficult-to-deform austenitic stainless steel by a double-furnace and -mandrel rolling mill, and relates to the technical field of iron and steel metallurgy. The method for rolling difficult-to-deform austenitic stainless steel by the double-furnace and -mandrel rolling mill optimizes the deformation distribution efficiency of the whole hot rolling process, reduces the temperature drop of the casting blank in the hot rolling process, and realizes balanced deformation in the whole process by reasonably distributing the deformation amount of the rough rolling area and the finishing rolling area. The strip steel passes through two rolling mills at the same time in single one-way rolling by adopting the double-furnace and -mandrel rolling mill, which is equivalent to completing two continuous deformations in a single pass, greatly improves the rolling efficiency, realizes rapid and stable rolling, and further reduces the deformation difficulty of the difficult-to-deform stainless steel. In addition, the on-line heating function of the hot coiling furnace makes the temperature of the edge of the strip steel stable in the appropriate hot working interval, optimizes the metal flow pattern, and reduces the risk of edge cracking from the root.

This invention provides a rear-mounted guide vane with a cylindrical body for an axial flow fan, belonging to the field of ventilation equipment technology. It solves the problems of insufficient airflow or low static pressure efficiency in the high static pressure zone in existing technologies. This invention includes a guide vane body, guide vane blades, and a central hub. The two sides of the guide vane body are the outlet side and the inlet side, respectively, with the diameter of the outlet side being larger than that of the inlet side. The guide vane body is integrally formed and has a conical ring shape. The inner wall of the guide vane body forms a first mounting surface, which is a conical ring structure. The central hub is ring-shaped, and several mounting protrusions are formed on one side of the central hub. The outer surface of the central hub and the mounting protrusions forms a second mounting surface. The guide vane blades are numerous and arranged in a circumferential array, fixed between the first and second mounting surfaces. The cross-section of the guide vane blades is a thin plate structure of uniform thickness with an arc shape. This invention has the advantages of reducing turbulence, increasing airflow in the high static pressure zone, high static pressure efficiency, and increased range.

This invention provides a solid-phase chemical cleaner for oil-based drilling fluids, comprising a long-chain alkyl polyamine compound. The solid-phase chemical cleaner for oil-based drilling fluids provided by this invention exhibits high surface activity; its hydrophilic portion preferentially adsorbs onto the surface of drill cuttings, improving the oil wettability of the drill cuttings surface, thereby improving the drilling fluid flow pattern. This facilitates timely removal using high-mesh vibrating screens, reducing the conversion of coarse particles to fine particles and slowing the generation and accumulation of submicron solid phases. Furthermore, its long molecular chain and charge density provide a strong adsorption and aggregation effect on fine solid particles, causing small particles to agglomerate into larger particles, which is beneficial for removal by solids control equipment and helps improve the separation efficiency of solids control equipment. This invention also provides a method for preparing and applying the solid-phase chemical cleaner for oil-based drilling fluids.