9results about How to "Improve flow stability" patented technology

The application relates to the field of piezoelectric pumps, in particular to a micro-nano piezoelectric air pump with air inlet and outlet on the same surface, which comprises a rack mechanism, an oil tank, an engine, a battery assembly and a silencer which are sequentially installed on a rack body, a moving piece located outside the rack body, a shell piece arranged outside the oil tank, a control piece arranged on the top of the shell piece and a tool box installed on one side of the shell piece. The piezoelectric ceramic prepared by adopting the micro-nano process is combined with the laser welding assembly mode instead of the adhesive assembly mode, so that the reliability risk of the aging of the adhesive layer and the decrease of the bonding force in the high-temperature, high-humidity and low-temperature environment is avoided, the air tightness and long-term consistency between the layers are ensured, and the durability of the product under the harsh working conditions such as vibration and mechanical impact is remarkably improved. Thirdly, the air inlet, the air outlet and the air exhaust are completed on the same structure surface, the flow path layout and the number of parts are simplified, and the assembly complexity and the cost are reduced.

The utility model discloses a nitric oxide generator for treatment and a nitric oxide therapeutic apparatus thereof, the nitric oxide generator comprises a shell, the shell is internally provided with a cavity, the shell is provided with an air inlet and an air outlet which are communicated with the cavity, and the air inlet and the air outlet are communicated with the cavity. The nitric oxide generator comprises two spark plugs which penetrate through the shell, central electrodes of the two spark plugs are arranged in the cavity, the central electrodes of the two spark plugs are opposite and arranged in a spaced mode, and the central electrode of one spark plug is connected with external high-voltage positive electricity to form a positive electrode and the central electrode of the other spark plug is connected with external high-voltage positive electricity to form a negative electrode. And the central electrode of the other spark plug is connected with external high-voltage negative electricity to form a negative electrode. According to the utility model, the disturbance to flowing airflow can be greatly reduced, the flow stability of nitric oxide (NO) gas is improved, and finally, the concentration of the nitric oxide (NO) gas inhaled by a patient can be improved, so that the treatment effect is improved.

The utility model discloses an elastic glue filling device. The filling device comprises a storage piece, a conveying piece, a conveying channel, a pressure adjusting piece and an air pressure control assembly, the storage part is used for storing elastic glue with compressibility; the conveying part is arranged at the bottom of the material storage part, communicates with the material storage part and is used for pressurizing and outputting the elastic rubber; one end of the conveying channel is connected with the output side of the conveying part, and the other end of the conveying channel is at least partially arranged above the storage part and used for enabling the elastic glue to flow back to the storage part; a filling part is arranged in the middle of the conveying channel and is used for filling and outputting the elastic glue; the pressure adjusting part is arranged at the end, away from the conveying part, of the conveying channel. The air pressure control assembly is connected with the pressure adjusting piece and used for providing constant air pressure for the pressure adjusting piece. Through the arrangement, the perfusion stability and precision of the perfusion device are higher.

The application belongs to the technical field of ice particle jet, and particularly relates to a device and a jet method for preparing straight-rotation mixed ice particle jet by using high-pressure superheated liquid flash evaporation, which comprises a high-pressure superheated liquid supply system and a water supply system, the high-pressure superheated liquid supply system and the water supply system are respectively connected with a straight-rotation mixed ice particle generation jet, the straight-rotation mixed ice particle generation jet system is connected with a recovery system, the recovery system is connected with the high-pressure superheated liquid supply system through a pipeline, the straight-rotation mixed ice particle generation jet system comprises a double-layer sleeve, the inner layer of the double-layer sleeve is connected with the water supply system, the outer layer is connected with the high-pressure superheated liquid supply system, an impeller is arranged at the outlet of the double-layer sleeve, a convergent atomizing nozzle is arranged at the outlet of the impeller, a protective shell is arranged outside the convergent atomizing nozzle, the convergent atomizing nozzle and the impeller center line are coincided with the inner layer, and the superheated liquid flash evaporation in the application has high refrigeration power and high speed, and can complete ice particle preparation in a short time.

This utility model discloses an injection mold with a hot runner flow guiding and interconnecting structure, including an upper mold with an internal mounting groove containing a hot runner mechanism. The hot runner mechanism includes an upper runner plate and a lower runner plate, each containing a main runner and multiple branch runners. The main runner and branch runners have semi-circular cross-sections, and the upper and lower runner plates combine to form a complete circle. Each of the branch runners contains a flow guiding and interconnecting component, which includes a guide tube and a flow regulating component. This utility model relates to the field of injection mold technology. This injection mold with a hot runner flow guiding and interconnecting structure makes the flow of molten plastic more uniform in the branch runners and main runner through the hot runner mechanism, thereby avoiding molding defects caused by uneven flow. Furthermore, the flow regulating component further optimizes the flow stability of the molten plastic.

The invention discloses an anti-material-interruption control method and system, and relates to the technical field of anti-material-interruption control, and the method comprises the steps: calculating the pressure impulse of an angular travel window; calculating the mass estimation value of the mixed gas in the angular travel of the single chamber based on the pressure asymmetric difference value; performing one-time degassing operation on the upstream bypass degassing valve based on the mixed gas mass estimation value; and after the one-time degassing operation is finished, removing residual wet films and condensed micro-drops in an annular gap area between the edge and the conical wall of the washing umbrella-shaped insertion piece. According to the invention, closed-loop determination of the continuous feeding process is realized.

The application provides a fluorine-free polymer processing aid and application thereof, the fluorine-free polymer processing aid comprises a polyurethane-based polymer and a synergist; the synergist comprises any one or a combination of at least two of polyethylene glycol, polypropylene glycol, polycaprolactone and polybutylene adipate terephthalate. The fluorine-free polymer processing aid provided by the application comprises a polyurethane-based polymer and a synergist, and the two jointly act to effectively reduce melt fracture and die build-up, improve the flow stability of a polyolefin melt, ensure the smooth surface of an extruded product, and be suitable for various processing environments; the processing aid not only has excellent processing performance, but also has low production cost and good environmental protection characteristics, and provides an efficient and sustainable solution for the polyolefin processing industry.

This invention discloses a thermometer fixture suitable for transient processes in cryogenic systems, comprising a front guide tube, a rear guide tube, and a temperature measuring block with a temperature sensor mounting interface. The first end of the front guide tube and the first end of the rear guide tube are respectively connected to process piping, and the second ends of the front guide tube and the rear guide tube are respectively connected to the temperature measuring block. A heat exchange channel is formed inside the temperature measuring block, which communicates with the internal channels of the front and rear guide tubes to form a through-flow fluid channel. The fluid being measured can flow through the heat exchange channel and exchange heat with the temperature measuring block. This invention employs a through-flow structural design, combined with a temperature measuring block made of high thermal conductivity material and an optimized flow channel structure, significantly reducing the thermal inertia and thermal resistance of the temperature measuring system and improving the transient thermal response speed. It is particularly suitable for temperature measurement in cryogenic transient conditions such as superconducting cryogenic systems and modular hydrogen liquefaction equipment in the 20–30 K temperature range.

This utility model relates to a screw 3D printing extrusion device that controls melt pressure using a branch melt channel piston. The melt pressure is controlled by the volume change of the branch melt channel piston, thereby achieving retraction, transitional extrusion, and continuous precise extrusion in the screw 3D printing extrusion device. It includes a main melt channel and branch melt channels, with a piston device installed within each branch melt channel. The main melt channel is connected to the branch melt channel on the left, and the screw extrusion device is installed on the right. A nozzle is installed below the branch melt channel, and an external piston drive device is installed above it. A piston control system controls the rotation of a piston drive motor, thereby driving the piston to reciprocate within the branch melt channel. The beneficial effects of this utility model are: by adjusting the piston speed and stroke, melt pressure fluctuations are reduced, completely solving the problems of non-retraction and precise controllable extrusion in screw extrusion 3D printing systems, thus improving the printing quality of screw extrusion 3D printing systems.