6results about How to "Improve propulsion performance" patented technology

The invention provides an energy-saving navigation method and system for a combined fleet under intelligent control, and relates to the technical field of data processing, and the method comprises the steps: collecting environment data and ship state data of fleet navigation in real time, carrying out the preprocessing, removing redundant data, obtaining a navigation data set, and obtaining a navigation data set according to the navigation data set; calculating a channel influence value, a sea condition influence value and a wake flow influence value, determining a resistance influence value of each ship according to the values, calculating the required power of each ship, obtaining a required power data set, calculating the compensation power of each ship, analyzing the limitation of the channel on the compensation power of the ships, balancing the distribution of the compensation power among the ships, and obtaining an energy-saving scheme. And the compensation power of each ship is adjusted in real time, the navigation efficiency of the fleet is monitored, execution data are obtained, whether the navigation efficiency reaches preset efficiency or not is analyzed, the resistance influence value of each ship is updated, and a power distribution scheme is adjusted. The propulsive power of the fleet can be intelligently controlled, and energy consumption is saved.

The utility model discloses a double-screw kneading machine for producing polyformaldehyde, which comprises a barrel body, a screw rod, a screw rod, a screw rod, a screw rod, a screw rod, a screw rod, a screw rod, a screw rod and a screw rod, wherein the barrel body extends along the horizontal direction; a feeding hole is formed above one end of the barrel body, and a plurality of vacuumizing holes are formed in the top; the end covers respectively cover two ports of the cylinder body; each screw rotor comprises a rotor shaft, each rotor shaft is sequentially provided with a spiral rolling propelling section impeller, a crushing propelling section impeller, a complete crushing section impeller and a reverse-rotation crushing discharging section impeller from the feeding end to the discharging end, the phase difference of the impellers on the two rotor shafts is 90 degrees, the impellers are matched with each other, and the impellers are matched with the inner wall of the cavity of the barrel; the shaft ends of the two rotor shafts penetrate out of center holes of the end covers respectively, and rotor shaft center cooling hole channels are formed in the shaft ends of the two rotor shafts respectively along the axes. And the heating jacket covers the periphery of the cylinder body and is arranged in sections, and each section is provided with a heating medium inlet and a heating medium outlet. The equipment is high in devolatilization efficiency, low in energy consumption and capable of continuously running for a long time, and the obtained polyformaldehyde product is good in quality.

The invention relates to a ship stern near-hull flow field adjusting method, which comprises the following steps of: 1, calculating a flow field near a hull according to a ship type and a working condition, and selecting a position where a spoiler is arranged; according to numerical calculation and a model test, a streamline near a stern and a hull is obtained, and a spoiler is arranged at the downward flowing position of the streamline in front of a stern shaft; 2, evaluating the drag reduction effect corresponding to each attack angle by adopting numerical calculation; comparing the total resistance value R0 before the spoiler is additionally mounted with the total resistance Ri of the ship after the spoiler is additionally mounted to determine which attack angle is finally adopted; 3, evaluating the ship resistance reducing effect of the spoiler, and judging whether the scheme of the spoiler continues to be modified or not according to the effect; the anti-drag effect of the device is verified by means of numerical calculation or model test and the like. The spoiler is arranged on the ship body in front of the tail shaft, and water flow is adjusted from obliquely downward flow to horizontally backward flow, so that the resistance of the ship is reduced, and the propelling efficiency of the propeller is improved.

A magnetic field control self-enhancement type electromagnetic emission device based on armature line guidance comprises a magnetic field enhancement module, a track module and an armature module, and the magnetic field enhancement module is arranged on the armature module and comprises a plurality of magnetic field enhancement units at specific intervals; the track module comprises two tracks which are arranged in a space in parallel; the armature module can move along the track direction. According to the device, the self-enhancement type electromagnetic emission device is controlled by the magnetic field guided by armature lines, in the moving process of the armature, the magnetic field enhancement unit on the armature plays a role in guiding the flow direction of current and increasing the density of current flowing through the armature, self-enhancement regulation and control of the magnetic field are achieved, the problem of non-uniform magnetic force distribution is solved, and therefore the Lorentz force borne by the armature is increased; the propelling efficiency is improved; meanwhile, good electric contact is achieved, contact pressure of the pivot rail is increased, contact resistance is reduced, and heat generated by the contact face of the pivot rail is reduced.

The utility model relates to the technical field of injection molding screws, and discloses a screw with an anti-backflow structure, which comprises an injection molding pipe and an extrusion rod arranged on the inner wall of the injection molding pipe and used for extruding injection molding materials, and further comprises a feeding pipe fixedly connected to the outer wall of the injection molding pipe, the guiding device is used for guiding molten injection molding materials into the injection molding pipe; and the extrusion screw is arranged on the outer wall of the extrusion rod, is spirally arranged and extrudes the injection molding material in the injection molding pipe to move during rotation. The sealing screw and the sealing push block are arranged and matched with the extrusion screw, so that the interior of an injection molding pipe can be effectively sealed, a molten injection molding material is prevented from flowing reversely in the extrusion process, the extrusion effect is remarkably improved, the injection molding material can be smoothly pushed forwards, and the problem of non-uniform injection molding or blockage caused by reverse flow is solved.

A concentric annular plasma fuel activation device for the injector rod of a ramjet combustion chamber is provided, comprising a combustion chamber housing (1), an injector rod (2), a flame stabilizer (3), an outer ring low-pressure electrode (4), and an inner ring high-pressure electrode (5). The outer ring low-pressure electrode (4) consists of a circular outer ring body (6), an outer ring fixing rod (7), and an outer ring discharge contact (8). The inner ring high-pressure electrode (5) consists of an inner ring high-pressure terminal (9), an inner ring body (10), and an inner ring discharge contact (11). To achieve insulation between the inner ring high-pressure terminal (9) and the combustion chamber housing (1), a hollow cylindrical inner ring fixing sleeve (12) is designed. A method for activating concentric annular plasma fuel for the injector rod of a ramjet combustion chamber is also provided. This invention addresses the problems of difficult ignition and low combustion efficiency of ramjet combustion chambers under low operating conditions. This invention employs an innovative sliding arc plasma excitation device after the fuel injector rod in the ramjet combustion chamber, which can optimize the working performance of the ramjet combustion chamber over a wide range of incoming flow parameters without the need for an external geometrically adjustable mechanism.