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

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 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.