72results about How to "Reduce vortex" patented technology

The invention provides a bladeless submersible propulsion system, which includes a main base, a vertical propeller group and a horizontal propeller group. The main base includes a casing, a variable frequency DC permanent magnet motor, a cable interface, a pressurization device, a water inlet pipeline, a water outlet pipeline and other parts; the vertical thruster group is used to provide the bladeless submersible propulsion system The power for floating, the horizontal thruster group is used to provide the power of the bladeless submersible propulsion system to advance, retreat and turn; the outlet pipeline is provided with a solenoid valve for adjusting the size and direction, and then change the thrust of each propeller, so as to realize the motion functions of the bladeless submersible propulsion system such as floating, diving, advancing, retreating, and turning. The invention has the advantages of adapting to harsh underwater environment, strong compatibility, low noise, high safety factor, compact structure, small volume, light weight and the like.

The invention discloses a flow adjustment energy dissipation device installed inside a container and used for a nuclear power plant. The flow adjustment energy dissipation device comprises a cylinder installed inside the container, a piston arranged in the cylinder, and a piston driving device used for driving the piston. A plurality of through holes are formed in the peripheral wall of the cylinder. The piston is driven by the piston driving device to move along the cylinder in the axial direction, so that the number of the through holes through which liquid passes is changed, the flow of the liquid is adjusted, and the flowing direction of the liquid is changed from the axial direction to the radial direction. Compared with the prior art, according to the flow adjustment energy dissipation device installed inside the container and used for the nuclear power plant, the multiple through holes are formed in the peripheral wall of the cylinder, so that the energy of the liquid entering the container is dissipated; in addition, by changing the number of the through holes through which the liquid passes, the liquid flow is adjusted through the axial movement of the piston; in this way, fluctuation, vortexes and turbulent flow generated by the liquid in the container can be effectively reduced, the stability of the liquid at an irrigating gate of a pump is guaranteed, and the vibration and noise generated by a circuit system are greatly reduced.

The invention relates to a snow making system for a performance test device for a freezing and refrigerating cabinet. The snow making system comprises a water and vapor mixing and spraying-out unit, a water tank and an air compressor for supplying compressed air for the water and vapor mixing and spraying-out unit. A water outlet and a snow making water supply opening are formed in the bottom face of the water tank. A water inlet is formed in the side face, away from the water outlet and the snow making water supply opening, of the water tank. The water tank communicates with an air-cooled chiller unit through the water outlet and the water inlet to form a water-cooling circulating loop. The snow making water supply opening communicates with the water and vapor mixing and spraying-out unit. According to the snow making system, water in the water tank flows from top to bottom, the water with the low temperature flows into the water inlet and is mixed with the water in the water tank, the longer the mixing process is, the more uniform the temperature cooling is, and therefore a snow making water region with the most uniform and constant temperature is formed naturally in the bottom region of the water tank, meanwhile it is avoided with an eddy is formed in the water tank and consequently the heat is lost, the stable snow making water temperature is guaranteed, the snow making density is increased and the snow making efficiency is improved.

The invention relates to an axial fan, which comprises a hub and three blades mounted on the hub. The three blades are distributed at equal intervals by taking a blade rotation central axis as a center, each blade is provided with a tail edge and a front edge opposite to the tail edge, three trapezoidal grooves which are gradually decreased in depth are sequentially arranged at the tail edge of each blade from the outside to the hub, and short sides of trapezoidal bottom sides of the three trapezoidal grooves are close to the front edge of the corresponding blade. The axial fan has the advantages that separation of boundary layers is integrally decreased, radial flow is effectively reduced, air volume is provided by reducing wakes of a rotor, vortexes and turbulent flow are avoided, air volume of the axial fan can be effectively increased, efficiency of the axial fan can be effectively improved, and the axial fan can be lightened, so that comprehensive cost is reduced. The axial fan with the advantages can be better applicable to an outdoor unit of an air conditioner, the refrigerating capacity and the heating capacity of the air conditioner can be enhanced, and the energy efficiency ratio of the air conditioner can be increased.

The invention discloses a beating device, a system and a beating method. The beating device includes a motor, a motor bracket, a rotating shaft, a cylinder, a cylinder bracket and a blade; the motor is fixed on the motor bracket, and the output shaft of the motor passes through the The coupling is connected with the rotating shaft; the rotating shaft is provided with multiple sets of blades, and extends into the cylinder; the cylinder is installed on the cylinder bracket, and the inner wall of the cylinder is provided with a plurality of bars, and the upper end of the cylinder A slurry outlet is provided, and a slurry inlet is provided at the lower end. When the blade of the present invention rotates at high speed, the natural fiber suspension forms a high-speed shear flow in the narrow flow channel. At this time, the tip of the knife has a certain inclination angle to the natural fiber from the axial direction (that is, the length direction) or the axial direction, and cuts in and picks the wire. And refinement, that is to get micro-nano cellulose. In a short time, the beating degree can reach 98°SR. The invention relates to the technical field of papermaking.

The invention relates to a diagonal fan (1), comprising an electric motor (10), a housing (11), and a diagonal impeller (12), which is accommodated in the housing (11) and can be powered via the electric motor (10), the diagonal flow of which generated during operation is diverted to a axial flow direction. The impeller (12) has impeller blades (121) distributed in the circumferential direction, and has an air inlet and an air outlet. The housing forms a flow channel for an airflow generated by the impeller, which has an axial portion that is not rotation-symmetrical, and a cylindrical axial portion, which, as viewed in the flow direction, axially directly adjoins the same. An air outlet-side radially outer end of the impeller is arranged in the cylindrical axial portion of the flow channel of the housing, and an air gap is provided between the radially outer end and the housing. The axial portion of the impeller that is not rotation-symmetrical is arranged in a region of the flow channel that is adjacent to the air inlet side of the air gap in an axial plane with the impeller such that the axial portion that is not rotation-symmetrical encloses the impeller, at least sectionally.