11results about How to "Flow field stability" patented technology

The application discloses a 10kV high-voltage switch cabinet single-gas-chamber gas diffusion test device, a test method, a system, equipment, a medium and products, and relates to the field of power equipment state monitoring and fault diagnosis. The device comprises a box body which is identical to the bottom gas chamber structure of the 10kV high-voltage switch cabinet, and is internally provided with a plurality of fault simulation points of a contact area, a conductor lap joint area, a cable terminal area and a bottom wiring area, and a plurality of monitoring points located at the front side position and the rear side position of the lower right corner of the gas chamber; the box body is also provided with a comb-shaped heater to simulate the operating temperature rise convection environment. The test method based on the device comprises the following steps: injecting characteristic gas to simulate discharge faults of different positions and intensities through the fault simulation points, setting the temperature rise working condition through the comb-shaped heater, synchronously collecting time sequence data of the characteristic gas concentration at the plurality of monitoring points, and extracting gas transport characteristic parameters. The application provides a standardized and repeatable test platform for studying gas diffusion rules and optimizing sensor layout.

The invention discloses a ship engine methanol fuel supply pipeline detection device, and relates to the technical field of pipeline detection, the ship engine methanol fuel supply pipeline detection device comprises a cabinet, and the upper surface of the cabinet is fixedly provided with a panel. By arranging the case and the panel, a firm protective shell and a flat operation platform are provided for the whole detection device, the case is made of an anti-corrosion material so as to adapt to the marine environment, and the panel serves as an installation reference of each functional module; the spraying mechanism is used for rapidly injecting a detection solution into the methanol fuel supply pipeline, a first connecting frame is fixedly arranged on the outer surface of the spraying mechanism, and the first connecting frame is fixedly connected to the inner wall of the panel. By arranging the spraying mechanism and the first connecting frame, a high-pressure injection system of a detection solution is formed, the first connecting frame provides accurate mounting and positioning for the spraying mechanism, and the spraying mechanism is responsible for generating controllable pressure to quickly inject the detection solution into a to-be-detected pipeline, so that the effect of sealing and detecting a supply pipeline is achieved.

The invention relates to a vortex ring pollination device for blueberries. A pollen supply system; the cylindrical pollination cavity is arranged on the lower side of the pollen supply system and is communicated with the pollen supply system; the pollination cavity is sleeved with the outer-layer cavity, the top of the outer-layer cavity is connected with the pollination cavity in a sealed mode, and the bottom of the outer-layer cavity is located on the lower side of the pollination cavity and provided with a flexible sealed opening; the vortex ring generation system is mounted on the outer-layer cavity and is communicated with the inner cavity of the pollination cavity; the pollination shell is arranged outside the pollen supply system, the pollination cavity, the outer layer cavity and the vortex ring generation system in a crossing and sleeving manner, an opening is formed in the bottom of the pollination shell and is used for mounting the flexible sealing opening, and a side wall opening for the vortex ring generation system to work is formed in the side edge of the pollination shell. By means of the airflow-driven fan-screw rod linkage design, integration of three functions of pollen blockage prevention, pneumatic stirring and mixing and downward pushing is creatively achieved, the structure is compact, additional motor driving is not needed, and reliability is high.

The application relates to a purging device for a liquid preparation system and relates to the technical field of medicine liquid preparation. In order to solve the problem that a traditional purging device cannot completely purge, the purging device comprises a conveying pipeline, the inlet end of the conveying pipeline is provided with a compressed air supply source, the outlet end of the compressed air supply source is sequentially and serially provided with a pressure reducing valve and an electric heater along the conveying pipeline, a plurality of heating modules are arranged in the electric heater, the plurality of heating modules are vertically stacked along the height direction of the electric heater, a heating channel is formed in the electric heater from bottom to top, and a temperature gradient from low to high is formed when the compressed air flows through the heating channel. The application has the effects of effectively stripping the residual moisture on the surface of the system, improving the removal rate of the residual moisture and solving the microbial pollution risk caused by incomplete purging.

The invention provides an intelligent battery changing cabinet with an independent battery compartment, and relates to the technical field of battery changing cabinets. The intelligent battery replacing cabinet with the independent battery bins comprises a battery replacing cabinet shell, the battery bins are evenly arranged in the battery replacing cabinet shell, the peripheral sides of the battery bins communicate with independent air bins, the independent air bins comprise the upper air bin, the lower air bin, the left air bin and the right air bin, and negative pressure holes are formed in the top ends and the bottom ends of the upper air bin and the lower air bin. The aperture of the negative pressure hole is gradually increased; a division piece is arranged in the upper and lower air cabins; the plurality of independent channels are communicated with one another; a plurality of flow guide ribs are distributed in the independent channel; resistance balance cylinders are arranged in the left and right air cabins, a plurality of radial air outlet grooves are formed in one sides of the left and right air cabins, air flows are formed in the upper and lower air cabins and the left and right air cabins through the exhaust fans, and the air flows in the left and right air cabins enter the battery cabin and enter the upper and lower air cabins through suction force formed by the negative pressure holes; and airflow is formed on the periphery and inside the battery compartment to enhance the heat dissipation effect.

The invention discloses a turbomachinery air cylinder inner side meridian molded line design method based on flutter suppression, and relates to the technical field of turbomachinery blade flutter suppression. Obtaining a radial basis function model; the radial basis function model is used for predicting the minimum aerodynamic damping value of the turbomachinery blade; the design parameters of the meridian profile on the inner side of the turbomachinery air cylinder serve as optimization variables, the maximum minimum aerodynamic damping value of a blade corresponding to the design parameters predicted by the radial basis function model serves as an optimization target, iterative optimization is conducted through an intelligent optimization algorithm, and the optimal design parameters are obtained; the design parameters represent radial distances from a plurality of points arranged at equal intervals in the axial direction between the front end position of a meridian molded line inlet section on the inner side of the turbomachinery air cylinder and the front edge position of a blade to a hub; and according to the optimal design parameters, the meridian molded line of the inner side of the turbomachinery air cylinder is determined. According to the method, the design aerodynamic performance of the meridian molded line on the inner side of the turbomachinery air cylinder is improved, and the flutter suppression capacity of the blade is enhanced.

The utility model discloses a main shaft of high-speed friction washing equipment, and relates to the technical field of plastic recovery equipment. A plurality of pairs of blade assemblies which are arranged in a 180-degree staggered mode are fixed to the circumference of the outer shaft at equal intervals, each pair of blade assemblies comprises two blades, the two blades are located outside the same circumferential section of the outer shaft, the two blades are arranged in a 180-degree mode, the blades and the axis of the outer shaft are arranged in a 90-degree mode, and the two blades are fixed to a first fixing plate through first bolts. A first reinforcing plate is arranged on one side of the first fixing plate, and the first fixing plate and the first reinforcing plate are welded to a shaft body of the outer shaft. And a pair of discharging blades which are arranged at an angle of 180 degrees are arranged outside the same circumferential section of the discharging end of the outer shaft, and the discharging blades and the blades in the same circumferential direction are arranged at an angle of 180 degrees. According to the utility model, materials can be uniformly dispersed, a stable flow field and multi-angle friction are formed, vibration and abrasion are reduced, and the equipment stability is improved.

The present application relates to the technical field of device heat dissipation, and provides a straight fin for a heat dissipation module and the heat dissipation module, the straight fin has a first end close to an air inlet position and a second end opposite to the first end, wherein a vertical hole is formed in the straight fin, the distance between the vertical hole and the first end is greater than the distance between the vertical hole and the second end. In the scheme, the entry section of the straight fin close to the air inlet position is not perforated, so that the airflow can smoothly enter and the flow field is stable, and the flow resistance is prevented from rising due to early disturbance. The middle and rear sections of the straight fin far away from the air inlet position have the thickest laminar boundary layer and the weakest heat exchange, and only the vertical hole is arranged in the middle and rear sections, and the outlet section of the straight fin is not perforated, so that the airflow after mixing can smoothly flow out, the wake loss and backflow interference are reduced, and the heat dissipation performance is improved.

This invention discloses an engine combustion closed-loop feedback monitoring device and system integrating multiple sensor interfaces in the field of engine combustion monitoring technology. The device includes a monitoring cylinder fixedly mounted on the cylinder head. A pre-measuring chamber and an optical measuring chamber are sequentially formed along the axial direction within the monitoring cylinder. The inlet end of the pre-measuring chamber is connected to the engine combustion chamber, and its outlet end is connected to the optical measuring chamber. A valve assembly is provided within the pre-measuring chamber, which is used to periodically open or close the communication channel between the pre-measuring chamber and the combustion chamber, and simultaneously periodically open or close the communication channel between the pre-measuring chamber and the optical measuring chamber. Multiple sensor interfaces are circumferentially formed on the side wall of the monitoring cylinder corresponding to the pre-measuring chamber. This device adopts a single-hole air-drawing installation to protect the structural strength of the cylinder head, and uses a chamber-based measurement layout to avoid mutual interference, keeping the optical monitoring component away from the high-temperature and high-pollution area of ​​the combustion chamber to prevent contamination and thermal damage.

The present application relates to a kind of diamond alloy heat-dissipating cold plate, it includes the substrate made of diamond alloy, cover plate, two connecting rings and two water taps;The substrate is opened with accommodating cavity, the accommodating cavity is provided with fin, the fin is surrounded with retaining wall, and the four around of the fin and the retaining wall are all left with gap to form flow channel;The cover plate is capped at the accommodating cavity opening of the substrate, and is sealed with the retaining wall Connection, form sealed heat exchange cavity;Two the connecting rings are set on the cover plate, and are communicated with the heat exchange cavity;Two the water taps are communicated with two the connecting rings respectively, for the in and out of cooling liquid.The present application has the effect of high heat conduction efficiency, strong structure adaptability, reliable sealing and stable heat dissipation performance.

This application provides a low-resistivity polycrystalline silicon carbide bulk material and its preparation method and apparatus. The method involves using isostatically pressed graphite as a substrate, first loading it into a reaction mechanism and creating a sealed negative pressure environment through vacuum. Then, the furnace body is heated in sections to a set deposition temperature. Subsequently, argon, hydrogen, methyltrichlorosilane, and nitrogen are sequentially introduced to achieve the set pressure within the furnace, and deposition is carried out at this temperature to obtain a silicon carbide deposit. Finally, the gas supply is stopped, the gas inside the furnace is replaced with nitrogen, and the product is removed after controlled cooling to room temperature. Through vacuum sealing, sectioned temperature control, precise gas supply, and stable pressure deposition, the uniform distribution of reaction gases and the full progress of the reaction are effectively ensured, significantly improving the density, thickness uniformity, and compositional stability of the silicon carbide deposit. Simultaneously, stable nitrogen doping is achieved, resulting in a low-resistivity, high-purity, crack-free, and defect-free polycrystalline silicon carbide bulk material. The process offers strong controllability and good product consistency, meeting the stringent application requirements of high-end industrial fields.