69results about How to "Strong convection" patented technology

The invention discloses a device and method for improving the quality of an aluminum alloy plasma arc welded joint. The device comprises a plasma arc welding machine. The plasma arc welding machine comprises a plasma arc welding gun and a plasma arc welding gun nozzle which is connected with the plasma arc welding gun and located below the plasma arc welding gun, wherein the plasma arc welding gun is connected with an ultrasonic vibration rod through a connection device, a vibration unit comprises a transducer, the ultrasonic vibration rod and an ultrasonic tool head all of which are connected in sequence, and the transducer is connected with an ultrasonic generator. On the premise of not changing original equipment, ultrasonic vibration is directly acted on the periphery of a welded joint through an auxiliary device, overflow of bubbles is increased through the ultrasonic vibration, and therefore the aims of overcoming defects of welding and improving welding quality are achieved.

The invention relates to a composite rotary stirring device and a working method thereof. The composite rotary stirring device comprises a tank body, wherein a driving mechanism is arranged in the center of the top of the tank body; an output shaft of the driving mechanism is fixedly connected with one end of an oscillating bar; the other end of the oscillating bar is rotatably connected with a stirring shaft; the axis of the stirring shaft is deviated from the axis of the tank body; a gear is fixed on the top of the stirring shaft and is engaged with a first inner gear ring arranged on the inner side surface of the top of the tank body; and the stirring shaft is provided with a blade mechanism. The stirring device is good in stirring effect and is good in stability in a working process.

The invention discloses a spiral heat dissipation aluminum alloy profile. The spiral heat dissipation aluminum alloy profile is characterized in that the spiral heat dissipation aluminum alloy profile comprises a main base plate, a left wing plate and a right wing plate which are all long strip-shaped plates; one face of the main base plate is a heat dissipation joint surface, and the left wing plate and the right wing plate are connected to the two sides of the other face, opposite to the heat dissipation joint surface, of the main base plate; the left wing plate and the right wing plate are perpendicular to the joint surface, and the longitudinal direction of the left wing plate and the longitudinal direction of the right wing plate are consistent with the longitudinal direction of the main base plate; the right wing plate is connected with a spiral wing, the outer end of the spiral wing is connected with the right wing plate, and the spiral wing is coiled between the left wing plate and the right wing plate; the end, far from the main base plate, of the left wing plate is provided with an inverted hook; a buckle is arranged on the outer surface of the spiral wing, and a gap is reserved between the buckle and the inverted hook; the spiral wing is coiled, and the buckle can be clamped onto the inverted hook. By adopting the spiral heat dissipation aluminum alloy profile, the required extrusion pressure is small; the main base plate, the left wing plate, the right wing plate and the spiral wing define a longitudinal air passage so that strong convection can be formed, and the heat dissipation efficiency can be improved.

The invention discloses a radiating fin. The radiating fin comprises a first radiating single fin and a second radiating single fin which are locked and connected together; an insulated electric heating flexible wire is arranged between the first radiating single fin and the second radiating single fin; a flexible wire channel which fits to arrangement track of the insulated electric heating flexible wire is arranged between the first radiating single fin and the second radiating single fin; the insulated electric heating flexible wire is positioned in a flexible wire channel; and heat-insulating hollow ribs and heat-insulating holes are formed in edge close to the radiating fin. Compared with the prior art, the radiating fin provided by the invention has the advantages that: the heat-insulating hollow ribs and the heat-insulating holes are arranged, so that the temperature of the edge can be prevented from rising to exceed 85K national standards, and a human body is prevented from being burnt when the human body is in contact with the edge of the radiating fin; the insulated electric heating flexible wire can realize long-time heating with nominal power while an excess temperature of the edge of the radiating fin does not need to be worried about; and the nominal power of the insulated electric heating flexible wire can be brought into full play.

The invention discloses a split flow-guide type aluminum alloy heat dissipating profile. The split flow-guide type aluminum alloy heat dissipating profile is characterized by comprising a main radiator and an auxiliary radiator; the main radiator is composed of a main base plate and wing plates, and the main base plate and the wing plates are all long-strip-shaped plates; one face of the main base plate is a heat dissipating connecting face, the wing plates are connected to the face, opposite to a heat dissipating face, of the main base plate, the wing plates are perpendicular to the connecting face, the longitudinal directions of the wing plates are coincident with the longitudinal direction of the main base plate, the number of the wing plates is at least two, barbs are arranged at the edges of the sides, far away from the main base plate, of the wing plates, and the phase positions of the barbs on the adjacent wing plates are opposite; and the auxiliary radiator is provided with a connecting plate and connecting wings, the connecting wings and the wing plates are the same in number and correspond in a one-to-one manner, and clamping grooves matched with the barbs are formed in the sides, far away from the connecting plate, of the connecting wings. The required extruding pressure is small, only buckling is needed in using, strong convection can be formed, and the heat dissipating efficiency can be improved.

The present invention provides a vertical pneumatic optical effect analog device, belonging to the pneumatic optical technology field. The device comprises a black body with an upward opening and a tank body with a downward opening and arranged at the upper portion of the black body, the opening of the black body and the opening of the tank body are connected through a telescoping structure, and the telescoping structure is internally provided with an iris aperture structure; the telescoping structure includes from inside to outside an inner layer extension tube, an insulating layer and an outer layer extension tube, the inner extension tube includes a non-extension end arranged at the middle portion and an extension tube connected with two ends of the non-extension end, and the iris aperture structure is installed on the non-extension end; and the iris aperture structure includes an annular ring, spindles uniformly distributed on the annular ring and arc-shaped metal blades rotating around the spindles, and the number of the spindles is the same as the number of the arc-shaped metal blades, and the number of the spindles at least have six. The vertical pneumatic optical effect analog device employs the feature of forming strong convection by using cold and hot gas to directly generate the airflow which generates the pneumatic optical effect so as to realize the purpose of direct analog of the pneumatic optical effect.