37 results about "Internal convection" patented technology

A turbine airfoil usable in a turbine engine and having at least one cooling system. At least a portion of the cooling system may include one or more cooling channels having a plurality of turbulators protruding from an inner surface and positioned generally nonorthogonal and nonparallel to a longitudinal axis of the airfoil cooling channel. The cooling channel may also include a plurality of vortex enhancers protruding from an inner surface forming the cooling channel and positioned nonparallel to the turbulators. In one embodiment, the vortex enhancers may be positioned generally orthogonal to the turbulators. The configuration of turbulators and vortex enhancers creates a higher internal convective cooling potential for the blade cooling passage, thereby generating a high rate of internal convective heat transfer and attendant improvement in overall cooling performance. This translates into a reduction in cooling fluid demand and better turbine performance.

A turbine airfoil usable in a turbine engine and having at least one cooling system is disclosed. At least a portion of the cooling system may include one or more cooling channels having a plurality of turbulators protruding from an inner surface and positioned generally nonorthogonal and nonparallel to a longitudinal axis of the airfoil cooling channel. The configuration of turbulators may create a higher internal convective cooling potential for the blade cooling passage, thereby generating a high rate of internal convective heat transfer and attendant improvement in overall cooling performance. This translates into a reduction in cooling fluid demand and better turbine performance.

The invention discloses an LED bulb with an internal convection radiating structure and an LED light source device. The LED bulb comprises a drive circuit (6), a lamp housing (8), a photo-permeable bulb housing (3), a radiator (7) and a heat transmission tube (2). The radiator (7) is connected with the lamp housing, the heat transmission tube (2) is connected onto the radiator, and an LED luminescent tube (4) is mounted on the heat transmission tube. A hole is opened at the top of the photo-permeable bulb housing (3), so that the top of the heat transmission tube is connected with an air flow net (1), and air penetrates through the air flow net and flows through the interior of the heat transmission tube continuously to form an air flow (A). Further, a circle of air flow groove (B) is arranged at the position where the radiator is connected with the photo-permeable bulb housing, and at least one air flow hole (C) can be arranged on the plastic lamp housing (8). The three kinds of air flow holes of A, B and C form a convection radiating channel.

The invention belongs to the technical field of aero-engine turbine cooling, and relates to a tapered inclined exhaust splitting seam structure for a turbine blade trailing edge. The inclined exhaustsplitting seam structure comprises a hollow turbine blade, an inner cavity cool air channel, a trailing edge exhaust splitting channel and trailing edge splitting seam partition ribs, wherein the inner cavity cool air channel is formed inside the hollow turbine blade, the trailing edge of the hollow turbine blade is provided with the trailing edge splitting seam partition ribs arranged side by side, and the trailing edge exhaust splitting seam channel is formed between the trailing edge splitting seam partition ribs arranged side by side for allowing cooling air to be discharged out of the blade and meanwhile carrying out air film coverage cooling on the blade trailing edge. According to tapered inclined exhaust splitting seam structure for the turbine blade trailing edge, the cool air canflow much smoothly, so that flow resistance and loss of the cool air in an cavity of the blade is reduced, and the flow resistance can be reduced by about 16%; and through designing an inclined exhaust trailing edge splitting seam into a tapered structure, the outflow speed of the cool air can be improved, internal convection heat exchange is strengthened, an air film coverage dead zone is reduced, in this way, comprehensive cooling effects of the blade trailing edge is further improved while blending loss is reduced, and heat exchange can be enhanced by about 8%.

The invention discloses a door and window air purification device, which comprises a hollow frame body, a first air port and a second air port are arranged on the frame body, and the frame body located between the first air port and the second air port There is a channel for air convection inside, and an air cleaning device is provided on the channel, so that when the door and window air cleaning device is installed on the frame of a door and window, indoor and outdoor air can not only pass through the door and window In addition to convection generated by the air purification device, it can also purify and remove harmful gases and substances flowing through the passage.

The invention discloses an electromagnetic suspension system for overlaying a transverse rotating static magnetic field, and belongs to the technical field of electromagnetic suspension. The system is characterized in that a tapered back winding coil 2 is connected with a high-frequency power supply 1 and extends into a vacuum chamber 6, the high-frequency power supply 1 inputs high-frequency alternating current to the tapered back winding coil 2, the alternating current generates an alternating magnetic field around the high-frequency power supply 1, induced current can be generated on the surface of a metal material placed in the tapered back winding coil due to the electromagnetic induction action, the induced current and an original alternating magnetic field interact to generate electromagnetic force, and the electromagnetic force and weight are balanced under the condition of configuration of appropriate magnetic field space, so that the electromagnetic suspension is realized; and a rotating mechanism 4 drives a U-shaped magnet yoke 3 to rotate, and the rotating U-shaped magnet yoke overlays the transverse rotating static magnetic field on the space (the space where a suspended object is located) where the tapered back winding coil is located, so that internal convection of the melted suspended object is reduced, the external rotation is reduced, and a stable electromagnetic suspension state is obtained.

According to the present specification there is provided a rotatable heat sink device which comprises a heat sink configured to enclose a cooling fluid, and the heat sink is rotatable about a rotational axis. The heat sink, in turn, comprises a first portion configured to receive thermal energy from a source external to the heat sink, and a second portion configured to dissipate at least a portion of the thermal energy to surroundings external to the device. The device further comprises an optical wavelength conversion material disposed on an outside surface of the first portion of the heat sink, and an agitator disposed inside the heat sink. The agitator is rotationally independent of the heat sink and is configured to promote circulation of the cooling fluid between the first portion and the second portion.

An electrochemical cell includes a permeable fuel electrode configured to support a metal fuel thereon, and an oxidant reduction electrode spaced from the fuel electrode. An ionically conductive medium is provided for conducting ions between the fuel and oxidant reduction electrodes, to support electrochemical reactions at the fuel and oxidant reduction electrodes. A charging electrode is also included, selected from the group consisting of (a) the oxidant reduction electrode, (b) a separate charging electrode spaced from the fuel and oxidant reduction electrodes, and (c) a portion of the permeable fuel electrode. The charging electrode is configured to evolve gaseous oxygen bubbles that generate a flow of the ionically conductive medium. One or more flow diverters are also provided in the electrochemical cell, and configured to direct the flow of the ionically conductive medium at least partially through the permeable fuel electrode.

The invention discloses a far infrared intelligent foot massage instrument adopting internal convection streamline design. The foot massage instrument comprises a spherical shell. The shell is provided with an opening. An ozone generator and a far infrared heater are arranged in the shell. The ozone generator is provided with ozone discharge openings which are distributed along the arc-shaped inner wall of the shell. According to the foot massage instrument, far infrared optical waves are utilized for stimulating acupuncture points of the human body, fatigue is effectively eliminated, blood circulation of the human body is promoted, and immunity is enhanced; the spherical appearance structure is adopted in the shell, the foot massage instrument is more attractive and elegant, the arc-shaped inner wall is beneficial for circular flow of internal air, and in this way, ozone generated by the zone generator flows along the arc-shaped inner wall of the shell after being discharged from the ozone discharge openings; meanwhile, flow of the ozone is accelerated by heat generated by the far infrared heater, and the more effective sterilization and far infrared physical therapy effects are achieved.

The invention provides a thermoregulation window. An inner frame is installed on an outer frame through a rotating assembly. The inner frame comprises an upper supporting beam and a lower supporting beam, the middle portions of the two supporting beams are connected through insulated glass. Inner glass and outer glass are separately arranged on the inner side and the outer side of the two supporting beams, an internal convection cavity is formed between the inner glass and the insulated glass, and an outer convection cavity is formed between the outer glass and the insulated glass. First ventilation openings are separately formed in the inner and outer sides of the upper supporting beam, and the two first ventilation openings separately communicate with the internal convection cavity and the outer convection cavity. Second ventilation openings are separately formed in the inner and outer sides of the lower supporting beam, and the two second ventilation openings separately communicatewith the internal convection cavity and the outer convection cavity. According to the thermoregulation window, the inner frame can rotate in the outer frame to facilitate cleaning and maintenance of the inner and outer sides of the window. A user can open the internal convection cavity and the outer convection cavity through a louver, the internal convection cavity and the outer convection cavitycan exchange heat in the form of convection, and the dust is prevented from entering while the temperature in a room can be adjusted according to season change.

The invention relates to the technical field of machinery, in particular to a gallium alloy heat dissipation material and a production technology thereof. The gallium alloy heat dissipation material provided with a fiber framework comprises a carbon fiber mesh; the thickness of the carbon fiber mesh is 0.1-5 mm; the diameter difference of openings in two sides of mesh openings of the carbon fiber mesh is less than 0.2mm, and each of the diameters of the openings in two sides is 0.1-5 mm; the mesh openings are through holes with the front and back communicated; the internal diameter of each through hole is more than 1.5 times greater than the diameter of the opening in the front side; and gallium alloy is embedded in the mesh openings of the carbon fiber mesh. When gallium alloy is in the liquid state, the surface tension is extremely high, and a smaller diameter of each of the openings of the mesh openings and a larger internal diameter of each through hole are arranged, so that gallium alloy is excellently fixed in the carbon fiber mesh and can in direct contact with the external part without flowing out. Heat dissipation is realized through internal convection caused by temperature difference of liquid-state metal. Compared with solid metal, the liquid-state gallium alloy has remarkably improved heat dissipation property and is suitable for being used as heat dissipation material.

There is disclosed a convection part structure of a convection-type electronic microwave oven, which comprises a oven body, a cavity, an electronic fitting chamber and a convection part. A motor of the convection chamber electric machine fixed in the external convection chamber and combined with the convection fan to drive the fan. A countercurrent fan disposed between the internal convection chamber and the external convection chamber for radiating the heat produced by the motor of the convection chamber. A convection chamber cover is disposed on the back side of the convection chamber for protecting the convection chamber and the members inside.

The invention relates to a forming method for an end enclosure structure and a lining of an IV-type cylinder. The method comprises the following steps that (1), mechanical arms clamp an upper metal insert and a lower metal insert and place the metal inserts at corresponding positions in a mould, a blank is extruded out, and the lower end of the blank penetrates through polar holes of the upper metal insert and the lower metal insert; (2), the mold is closed; (3), parison blow molding and forming is ended, convective heat exchange cooling inside the mold is performed, the blank is cooled to a proper temperature, the mold is opened, the parison with the inserts is removed, blow molding burrs are removed, and then cooling and shaping are performed; (4), the cooled and shaped parison is placedon a rack to be fixed, and a blow molding false head is cut off with a blade; (5), a metal end cover is assembled, the metal end cover is connected with the metal inserts through threads, and a groove in the neck of a metal end head allows a torque wrench to exert force; (6), fiber winding is performed. By means of the forming method, the problem that the extruded and blow molding parison cannotpenetrate through the polar holes of the metal inserts is solved; and meanwhile, the process method for implementing the engineering is proposed targeted to the structure, and thus the advantages of the extrusion and blow molding process are played effectively.

The invention is applicable to the field of refrigeration and low temperature, and discloses a convection heat switch which comprises a first heat conductor, a second heat conductor, a first connecting pipe and a second connecting pipe, and is characterized in that the first heat conductor is provided with a first arc-shaped inner cavity, the second heat conductor is provided with a second arc-shaped inner cavity and an inflation inlet communicated with the second arc-shaped inner cavity, the inflation inlet is used for being externally connected with an inflation system, the first connecting pipe and the second connecting pipe are both used for connecting the first heat conductor and the second heat conductor, the first arc-shaped inner cavity and the second arc-shaped inner cavity are communicated through the first connecting pipe and the second connecting pipe, the first connecting pipe and the second connecting pipe are arranged at an interval, and the first arc-shaped inner cavity, the second arc-shaped inner cavity, the first connecting pipe and the second connecting pipe form a convection channel. The convection heat switch adopts an arc-shaped flow path space, the convection heat exchange intensity in the convection heat switch is enhanced, the heat conductivity of the conduction state of the convection heat switch is doubled, and the switch ratio is correspondingly doubled.

The invention discloses a uniform preparation device for a physical foaming material, and relates to the technical field of foaming material preparation, the uniform preparation device comprises an electric power base, an electric power connecting groove is formed in the top end of one side of the electric power base, a supporting column is fixedly mounted at the top end of the electric power base, and a sliding lifting adjuster is detachably mounted on one side of the supporting column; the top end of one side of the sliding lifting adjuster is fixedly connected with a transverse connecting rod. Through cooperation of a movable rod, a mounting connecting rod, a power rotating shaft, stirring blades and a convection groove, the stirring blades are driven by the power rotating shaft to rotate and stir, vibration generated by stirring of the stirring blades is reduced, the vibration frequency of the mounting connecting rod is reduced, and the service life of the stirring device is prolonged; a certain number of convection grooves are formed in the surfaces of the stirring blades, internal convection of the raw materials is increased in the stirring process, and therefore the stirring uniformity of the raw materials is improved, the product quality is improved, and meanwhile the production efficiency of the device is improved.

The invention belongs to the field of aero-engines, and particularly relates to a multi-inclined-hole flame tube wall temperature calculation method which comprises the following steps: establishing a heat balance relational expression in the step 1 based on internal radiation, internal convection, external radiation, external convection, in-hole convection and a heat conduction relational expression, and determining a nonlinear relational expression based on flame tube cold side wall temperature and flame tube hot side wall temperature; and solving according to a Newton iteration method to finally obtain the required flame tube wall temperature.