Manufacturing method of imitated shark mucus surface release drag reduction structure

The invention relates to the technical field of engineering bionics, in particular to a bionic dolphin skin based on a shape memory alloy artificial muscle. The bionic dolphin skin based on the shape memory alloy artificial muscle comprises a supporting base, a hardened conducting layer, a flexible resin layer, a flexible conducting layer, a smooth rubber layer and artificial muscle stretching and contraction units, wherein each artificial muscle stretching and contraction unit comprises a shape memory alloy artificial muscle spring, a traction head, a two-section type electric heating rod and a connecting lead. Compared with the prior art, the shape memory alloy artificial muscle is used for imitating elastic mastoid processes in a dolphin skin structure; the unique material characteristic of the shape memory alloy artificial muscle is used for achieving protrusion or pit type deformation of the bionic dolphin skin, wherein the unique material characteristic of the shape memory alloy artificial muscle is that the two-way memory effect is achieved through driving of the transformation temperature of the shape memory alloy artificial muscle; the flexible working mechanism of the bionic dolphin skin is more sensitive and controllable, and a beneficial example is provided for development of the engineering bionics technology and especially the bionic anti-drag epidermis manufacturing technology in the aspect of the structural and functional bionics.

Bionic dolphin skin based on shape memory alloy artificial muscle

An automatic Chinese chestnut huller comprises a power transmission mechanism, an automatic regulating device, a hulling roller cutter and a screening mechanism. The power transmission mechanism is formed by a driving shaft and a driven part; the power transmission mechanism is connected with a lower roller of the automatic regulating device through a third belt wheel, an upper roller and the lower roller are driven to rotate simultaneously through a gear mechanism, and Chinese chestnut shells are fractured; the power transmission mechanism is connected with the hulling roller cutter through a first driven belt wheel, the hulling roller cutter is driven to rotate, and the Chinese chestnut shells are removed; the power transmission mechanism is connected with a crank of the screening mechanism through a second driven belt wheel, the screening mechanism is driven to conduct reciprocating motion upwards and downwards, and the Chinese chestnut shells and Chinese chestnuts can be separated. The automatic Chinese chestnut huller enables the Chinese chestnut shells to be separated from the Chinese chestnuts better, fills the vacancy of automatic Chinese chestnut hullers at the current market, and is suitable for families, Chinese chestnut planting bases and other occasions.

Automatic Chinese chestnut huller

The invention discloses a fusiform bionic microstructure with drag reduction characteristics, and belongs to the field of microstructure functional materials. The structure comprises: (a) a fusiform structural layer, and (b) a substrate material layer, wherein a plurality of fusiform structural bodies are arranged on the substrate material layer in a certain arrangement rule to form the fusiform structural layer. On end of the fusiform structural body is a sharp corner, the other end of the fusiform structural body is a circular curved surface, each sharp corner is connected with the circularcurved surface through a smooth curved surface, and the sharp corner ends of the fusiform structural bodies face to the same direction. The fusiform microstructure based on a surface layer microstructure of an alpine fargesia leaf provided by the invention can significantly reduce the surface friction resistance and effectively improve the aerodynamic performance of a solid flow contact layer, sothat the fusiform bionic microstructure can be widely applied to the field of modern engineering.

Fusiform bionic microstructure with drag reduction characteristics

The invention relates to the field of engineering bionic technology, in particular to bionic sharkskin making use of a shape memory alloy artificial muscle longitudinally-injected drag reducer. The bionic sharkskin making use of the shape memory alloy artificial muscle longitudinally-injected drag reducer comprises a supporting base, a hardened conductive layer I, artificial muscle flexible units, a hardened conductive layer II, a shark scale imitation skin layer and a drag reducer longitudinal injection device, wherein each artificial muscle flexible unit comprises a shape memory alloy artificial muscle spring, a pulling head, a two-section electric heating rod and a connection conductive wire, and each shape memory alloy artificial muscle spring has a certain amount of supporting strength. Compared with the prior art, the bionic sharkskin making use of the shape memory alloy artificial muscle longitudinally-injected drag reducer has the advantages that by the adoption of the design of shape memory alloy artificial muscle, a micro mucus secreting mechanism of the sharkskin is simulated by means of the unique material characteristic that the double-trip memory effect is presented under the driving of transformation temperature of the shape memory alloy artificial muscle, the working mode and control method of injecting a micro amount of the drag reducer are more sensitive, controllable and reliable compared with existing means, service life is guaranteed effectively, and a beneficial example is provided for the engineering bionic technology, especially the bionic drag reduction skin manufacturing technology, in the aspect of structure and function bionics.

Bionic sharkskin making use of shape memory alloy artificial muscle longitudinally-injected drag reducer

High-fidelity shark-imitating anti-drag structure capable of slowly releasing drag reducer instantly and manufacturing method thereof

The utility model relates to the technical field of simulation, in particular to a drag reducing structure. A slow-release drag reducing structure with a scale skin comprises a scale skin main body, a slow-release electrohydraulic control system and a liquid storage tank, wherein the scale skin is coated on the upper surface of the scale skin main body; the lower surface of the scale skin main body is provided with at least two drag reducer conveying channels; the at least two drag reducer conveying channels are communicated with each other; a through hole for communicating the upper surface and the lower surface of each drag reducer conveying channel is formed in the drag reducer conveying channel; the slow-release electrohydraulic control system comprises a speed relay and a speed relay connection control module; the control module is connected with the control end of a hydraulic pump; the liquid storage tank is connected with the hydraulic pump; and the hydraulic pump is connected with each drag reducer conveying channel through a liquid conveying pipeline. Due to the adoption of the technical scheme, the slow-release drag reducing structure is applied in the drag reducing field, so that a high-efficiency coupling drag reducing effect between a scale groove and self-lubricating mucus can be realized.

Slow-release drag reducing structure with scale skin

The invention relates to the technical field of agricultural product processing machinery, specifically a shucking machine. A vertically guided feeding type lotus seed and chestnut shucking machine comprises a stand on which a feeding hopper, a material conveying mechanism, a cutting mechanism, a material compacting mechanism and a shell and pulp separating mechanism are provided. The material conveying mechanism comprises a left-side feeding roller and a right-side feeding roller. One side of the left-side feeding roller is provided with a left-side gear. One side of the right-side feeding roller is provided with a right-side gear. The left-side gear and the right-side gear are meshed. The left-side feeding roller is opened with at least two arc roller slots circumferentially. The shucking machine further comprises a driving wheel, a driven wheel and a conveyor belt. The right-side feeding roller is used as the driven wheel. The shucking machine of the invention is vertical processing type to be adapted to shucking lotus seeds and chestnuts with different sizes with high working efficiency, low damaging rate and excellent shucking effect to materials in batches after the size assortment.

Vertically guided feeding type lotus seed and chestnut shucking machine

The utility model relates to the field of agricultural product processing machinery, particularly to a shucking machine. The shucking machine allowing material to be fed conveniently comprises a machine frame; a feed hopper, a cutting mechanism, a material pressing mechanism, a shuck and pulp separating mechanism and a power transmission mechanism are arranged on the machine frame; the shucking machine further comprises a guiding feeding mechanism; the guiding feeding mechanism comprises a left side feeding rolling wheel and a right side feeding rolling wheel; at least two circular arc-shaped rolling wheel grooves are formed along the circumference of the left side feeding rolling wheel; a left side gear is arranged on one side of the left side feeding rolling wheel; a right side gear is arranged on one side of the right side feeding rolling wheel; the diameter of the left side gear is larger than that of the right side gear; the left side gear is meshed with the right side gear; and one of the left side feeding rolling wheel and the right side feeding rolling wheel is connected with a motor through the power transmission mechanism. Through the adoption of the technical scheme, after the shucking machine is provided with the guiding feeding mechanism, material is placed in the grooves in a one-to-one manner, so that cutters of the cutting mechanism as well as pulp of the material can not be damaged.

Longwei Jiao

Papers

High-fidelity shark-imitating anti-drag structure capable of slowly releasing drag reducer instantly and manufacturing method thereof

Slow-release drag reducing structure with scale skin

Vertically guided feeding type lotus seed and chestnut shucking machine

Shucking machine allowing material to be fed conveniently