14 results about "Planar flow" patented technology

This application discloses a high-silicon steel strip and its preparation apparatus, method, and application, belonging to the field of non-oriented high-silicon steel technology. The preparation apparatus includes: a crucible for planar flow casting equipment, with a heater surrounding the crucible for heating and holding the master alloy to form high-silicon steel liquid; a nozzle gap at the bottom of the crucible; a cooling copper roller located below the crucible for cooling and rapidly solidifying the high-silicon steel liquid to form an initial high-silicon steel strip of a certain thickness; and a rolling protection device located near the cooling copper roller, which creates a locally sealed atmosphere by introducing inert gas and continuously acts on the area between the high-silicon steel liquid and the cooling copper roller during the casting process. The technical solution of this application sets a rolling protection device near the surface of the cooling copper roller during the solidification process of the high-silicon steel liquid. This rolling protection device combines forced rolling and local inert atmosphere protection functions to improve the wettability of the steel liquid to the cooling copper roller and the forming stability.

This utility model belongs to the field of drainage structure parts for hot chambers, and discloses a permeable screw with threaded grooves and holes. It includes a head, a screw body, a special metal washer, and a drainage channel. Using a screwdriver and the head, the screw is screwed into the threaded opening of the hot chamber body. The screw threads engage with the threaded grooves of the hole for fixation, and the rounded tip avoids damage to the internal threads. During liquid discharge, the drainage channel forms a three-dimensional flow guiding network consisting of a through channel and drainage holes. Under pressure, the liquid rises and overflows along the through channel. The special metal washer is fitted onto the smooth rod section, and its drainage annular groove and water inlet form a planar flow guiding system. Changing the number of washer grooves allows for flow rate adjustment. This utility model has a compact and reasonable structural design, strong pressure and temperature resistance, and a simple structure. It is suitable for draining liquids from some general-purpose chemical experimental reactors, eliminating the need for expensive temperature and pressure resistant regulating valves, making it easy to use and with low maintenance costs.

[Problem] A purpose of the invention is to improve dust collection efficiency while reducing pressure loss in a cyclone. [Solution] A cyclone 1, 11, 21 according to the invention includes: an outer cylinder 3 provided at an upper portion of a rotating cylinder 2; an inner cylinder 4 provided concentrically within the outer cylinder 3; a flow straightening member 5 in a space immediately below the inner cylinder 4, in which a plurality of planar flow straightening plates, each having a curved surface formed in at least a lower half thereof, are provided at equal angular intervals around an axis of the inner cylinder 4, and the curved surface of each planar flow straightening plate is provided in the same direction as a swirling flow flowing around an inner circumference of the inner cylinder 4; an inlet tube 6 provided tangentially to an outer circumference of the outer cylinder 3; a drop port 8 provided at a lower portion of the rotating cylinder 2; and a re-scattering prevention member 9, 19, 29 provided at a lower end portion of the flow straightening member 5. The re-scattering prevention member may have a cylindrical, inverted conical or inverted truncated conical shape.

The invention relates to a column (140) for a gas chromatograph. The invention suggests that the column (140) is a 3D-column comprising a carrier part (142) with a plurality of channels (143), a number of first and second connecting passages (1461, 1462) each coupling two adjacent first openings (1431) or second openings (1432) and a first and a second cover (1441, 1442) coupled to the carrier part (142), such that a 3-dimensional continuous flow path is provided. In the alternative, the column has a carrier part with a continuous planar flow path defined by an open channel formed into the carrier part, a cover part attached to the latter with a plurality of filling holes arranged along the open channel and a sealing member sealingly closing the filling holes. The invention also relates to a manufacturing method.

The application provides an inconel alloy foil and a preparation method thereof, and comprises the following steps: according to a preset alloy component ratio, feeding refined materials of each component of the alloy into a vacuum melting furnace to perform vacuum melting, and preparing a molten metal obtained by the vacuum melting into an inconel alloy cast strip with a target thickness through a plane flow casting process; cooling the plane flow cast inconel alloy extremely thin strip of the inconel alloy cast strip to room temperature under a protective atmosphere to obtain a room temperature cast strip; performing one rolling pass of cold finish rolling on the extremely thin strip of the room temperature cast strip through a rolling mill to obtain a semi-finished foil; and performing heat treatment on the semi-finished foil. The application can solve the problems in the prior art, such as a long and complicated process flow, a low yield, a waste of a large amount of resources and energy, poor uniformity of a prepared finished product, and poor mechanical properties.

A turbo compressor (10) comprises: an intermediate flow path (30) through which a refrigerant flows between a first impeller (11) and a second impeller (21); a diffuser flow path (40) through which the refrigerant that has flowed out from the second impeller (21) flows; and a volute flow path (50) through which the refrigerant that has passed through the diffuser flow path (40) flows. The diffuser flow path (40) includes a planar flow path (43) extending in a radial direction, and a curved flow path (44) bent to the opposite side to a refrigerant inflow side in an axial direction with respect to the planar flow path (43). The volute flow path (50) extends in a circumferential direction and is connected to the curved flow path (44). A maximum value (Rv) of the outer diameter of the volute flow path (50) is equal to or less than a maximum value (Rr) of the outer diameter of the intermediate flow path (30).

[Problem] To improve dust collecting efficiency while reducing the pressure loss of a cyclone. [Solution] This cyclone 1 comprises: an outer cylinder 3 provided at the upper part of a revolving cylinder 2 and expanded in diameter downward; an inner cylinder 4 concentrically provided in the outer cylinder 3; a conical part 9 provided at the lower end of the outer cylinder 3 and contracted in diameter downward; a flow straightening member 5 which is provided in the space directly below the inner cylinder 4 and in which a plurality of planar flow straightening plates, each having a curved surface formed in at least the lower half thereof, is provided at equal angular intervals around the axis of the inner cylinder 4, the curved surface of each planar flow straightening plate being oriented in a direction opposite to the swirling flow flowing around the inner periphery of the inner cylinder 4; an inflow cylinder 6 provided in the tangential direction to the outer periphery of the outer cylinder 3; and a drop port 8 provided at the lower part of the revolving cylinder 2. An inner diameter D2 of the lower end of the outer cylinder 3 can be 1.1-2.2 times an inner diameter D1 of the upper end of the outer cylinder 3. The height of the outer cylinder 3 can be 0.8-1.6 times the inner diameter D1 of the upper end of the outer cylinder 3.

The application relates to a high-vacuum pumping speed test air inlet flow distribution mechanism, which comprises a connecting flange, an air inlet pipe connected to one side of the connecting flange, and a planar flow distribution plate, a first connecting rod, a first conical flow distribution plate, a second connecting rod and a second conical flow distribution plate connected to the other side of the connecting flange in sequence. The flow distribution plate based on the double-stage conical flow distribution structure can ensure that the gas molecules collide at least twice when entering the back, realizes a good equilibrium state, has the advantage of small air release amount, avoids the beam effect caused by the traditional elbow air inlet, reduces the measurement uncertainty of the background vacuum, and can improve the test efficiency and the reliability of the test results.

To reduce the size of a turbo compressor while maintaining fluid efficiency. A turbo compressor (10) includes an intermediate flow path (30) through which a refrigerant flows between a first impeller (11) and a second impeller (21), a diffuser flow path (40) through which the refrigerant flowing out of the second impeller (21) flows, and a volute flow path (50) through which the refrigerant that has passed through the diffuser flow path (40) flows. The diffuser flow path (40) includes a planar flow path (43) extending in the radial direction and a curved flow path (44) bent in the axial direction opposite to the refrigerant inlet side with respect to the planar flow path (43), and the volute flow path (50) extends in the circumferential direction and is connected to the curved flow path (44), and a maximum outer diameter (Rv) of the volute flow path (50) is equal to or smaller than a maximum outer diameter (Rr) of the intermediate flow path (30).

Flow guide plate (1) for an electrochemical cell (3), comprising at least one planar flow guide area (5) having a center (7) and a periphery (9), wherein at least one flow guide (11) is arranged in the flow guide area (5), which fluidically connects a media inlet (13) with a media outlet (15), wherein a) a first flow guide section (17) of the flow guide (11) leads from the media inlet (13) arranged in the periphery (9) to the center (7) and transitions in the center (7) into a second flow guide section (19) of the flow guide (11), which leads from the center (7) back to the media outlet (15) also arranged in the periphery (9), or b) the first flow guide section (17) leads from the media inlet (13) arranged in the center (7) to the periphery (9) and in the periphery (9) transitions into the second flow guidance section (19),which leads from the periphery (9) back to the media outlet (15) also arranged in the center (7), wherein the first flow guidance section (17) and the second flow guidance section (19) run parallel to each other, characterized in that the flow guidance plate (1) has, in addition to the at least one media inlet (13) and the at least one media outlet (15) for a medium, at least one passage opening (23) for the same medium, wherein the passage opening (23) for the same medium is not fluidically connected to the flow guidance area (5), wherein the at least one passage opening (23) and the at least one media inlet (13) and / or the at least one media outlet (15) have the same cross-sectional size and shape, wherein the flow guidance plate (1) is designed in such a way thatthat, starting from a first position of the flow guide plate (1) in space, after a rotation of the flow guide plate (1) by a certain angle, the passage opening (23) in a second position of the flow guide plate (1) in space comes to be located at a first location where a functional opening, selected from the media inlet (13) and the media outlet (15), is arranged in the first position, and the functional opening in the second position comes to be located at a second location where the passage opening (23) is arranged in the first position.

The present invention relates to a manufacturing apparatus comprising: a main housing providing a working surface in a manufacturing space; an optical system for providing a beam to irradiate the powder in the build platform region of the working surface to produce the component layer by layer; and a shielding gas system for providing a planar flow of shielding gas in the manufacturing space. The protective gas system has a discharge opening structure and a suction opening structure for flowing gas into the manufacturing space and extracting gas therefrom. The discharge opening structure and the suction opening structure are arranged on opposite sides of the main housing such that a flat flow of shielding gas flows through a working surface between the opposite sides of the main housing. The shielding gas system has a secondary outlet opening for flowing the gas into the manufacturing space in the direction of the shielding gas planar flow, the secondary outlet opening being designed to form a secondary shielding gas flow which defines a flow profile of the shielding gas planar flow.

This invention provides an external drive feedback control method for a flow control valve, comprising the following steps: S1, a servo motor outputs rotational power to a planetary gear reducer, which then transmits the driving force to a three-stage rotary valve; S2, by controlling the rotational angle, the oil flow capacity and direction of the three-stage rotary valve are controlled, thereby achieving different valve body functions; S3, the sealed chamber of the flow counting component achieves relative rotation of the metering rotor under the action of the first pressure oil, and then the power is transmitted to the encoder through the first transmission shaft connected by a spline. The encoder's precise rotational angle measurement then achieves a high-precision feedback electrical signal output to the control system; S4, closed-loop control of the valve orifice flow. This invention targets a planar flow distribution valve core structure, employing an ultra-low pulsation volumetric flow counting component. By counting the valve orifice flow, high-precision measurement of the valve orifice flow is achieved. The feedback method is simple, the feedback structure is simple, the feedback links are few, and the control is precise.

The invention provides a tracking method for a planar flow field vortex structure, belongs to the technical field of vortex motion research, and particularly relates to a method for determining the planar flow field vortex structure based on a traditional vortex identification method, fusing parameters such as a geometric center or an extreme point, a motion speed and a geometric region of the vortex structure, and identifying the planar flow field vortex structure. Automatic trajectory tracking of a large number of multi-scale vortex structures is achieved based on the minimum distance, the movement direction of the vortex structures and other means, and meanwhile the corresponding relation of the vortex structures in the merging and cracking process is established based on overlapping of vortex structure areas at the previous moment and the later moment and the area change. That is to say, when a large number of multi-scale vortex structure trajectories are automatically tracked, the source of the newly generated vortex structure and the destination of the disappearing vortex structure are matched, which is of great significance to accurately elaborating generation, development and interaction rules of the turbulence structure.

The embodiment of the invention provides a stacked film blowing mold and a film blowing machine. The stacked film blowing mold comprises a bottom mold; the mold column is arranged on the bottom mold; the multiple layers of molds are sequentially arranged on the mold column in a sleeving mode, and a discharging runner is formed between the multiple layers of molds and the exterior of the mold column; a plane runner is formed between every two adjacent molds, and one end of each plane runner is communicated to the discharging channel; the die head assembly is arranged at the second end of the die column; the at least one feeding flow channel is communicated with the at least one plane flow channel; the plane flow channel comprises a middle flow channel, and other plane flow channels are located on the two sides of the middle flow channel; and a group of plane runners distributed on the two sides of the middle runner are connected with the second feeding runner. According to the technical scheme, one feeding flow channel can transversely penetrate through the multiple layers of molds to be communicated with the multiple plane flow channels, the multiple plane flow channels can share one feeding flow channel and the feeding device for feeding, the number of the feeding devices needing to be matched is reduced, the cost of the film blowing machine is reduced, and the failure rate is also reduced.