49results about How to "Large temperature drop" patented technology

The invention discloses a turbine guider blade cooling device with low-melting-point metal as a flowing working medium, and relates to guider blade cooling. A plurality of cooling channels and cavities are arranged in a guider blade. The turbine guider blade cooling device with the low-melting-point metal as the flowing working medium comprises a flow divider, a collector, a radiator and an electromagnetic pump, wherein the electromagnetic pump and the guider blade form a closed loop, liquid low-melting-point metal or alloy thereof is driven by the electromagnetic pump to serve as the flowing working medium to circularly flow in the closed loop, and rapid heat dissipation is achieved through the radiator. According to the turbine guider blade cooling device with the low-melting-point metal as the flowing working medium, air cooling is not adopted, cooling air originally led out from a gas compressor is saved, and the propelling power of an aircraft is increased; the cooling effect is far better than that of a gas cooling mode in a traditional process, the heat transfer efficiency is high, and the temperature drop of the guider blade is larger, so that the service life of the guider blade is prolonged; air film holes do not need to be formed in the outer surface of the guider blade, and the strength of the blade is improved; the whole process is cyclically closed, the low-melting-point metal or the alloy thereof is recycled, and the environment is not affected.

The invention belongs to the technical field of hot air drying of agricultural and sideline products, and discloses a multi-stage heat pump drying and dehumidification system with a bypass pipeline, comprising: a control unit, a main air duct and a drying room for placing materials to be dried, the drying room An air supply port for introducing gas and an air exhaust port for exhausting gas are provided; the two ends of the main air duct are respectively connected with the air supply port and the air exhaust port, and the main air duct is provided with a main fan and an air exhaust port. A dehumidification chamber, a water baffle, and a heating chamber are arranged in sequence along the airflow direction; it also includes a multi-stage heat pump unit and a bypass pipeline connected with the dehumidification chamber to realize multi-stage heating and multi-stage dehumidification. Compared with the single-stage heat pump drying system, the pressure ratio of the compressor is reduced, and the efficiency of the compressor is improved, and the air volume control based on the bypass pipeline can effectively adjust the dehumidification performance of the system, so that the system has a larger adjustment range.

A micro - refrigerator is prepared as applying relaxation ferroelectric material as working media of refrigeration , using n layers of ferroelectric stacks and m x 1 arrays of ferroelectric stacks as sum of n x m x 1 units to form micro ¿C refrigerator . Its refrigerating method includes applying phase transition refrigeration of electric field induction as quickly adding electric field and slowly putting off electric field on each refrigerating sheet (RS), using the same working mode in the same layer or in each interval layer of RS in different line, using specific time sequence and circulation for each layer of RS and operating ferroelectric stack arrays alternatively.

A turbine (3) includes: a turbine impeller chamber (43) having a tubular outflow portion (432), from which an exhaust gas flows out in an outflow direction (F) substantially parallel to an axis (C) of a turbine impeller (5); a bypass flow passage (491) bypassing the inside of the turbine impeller chamber; an outer duct (47) having an inner peripheral surface (475) that expands in diameter in the outflow direction from the outflow portion; and an inner duct (48) that extends in the outflow direction from the outflow portion. A diffuser flow passage (483) that expands in diameter in the outflow direction is disposed in the inner duct at least in a portion between the outflow portion and a distal end portion (481a). An outlet (492) of the bypass flow passage and a waste gate valve (493) that opens and closes the outlet are disposed on the inner peripheral surface.

The swirling cooling tower of the invention belongs to the technical field of chemical cooling. The cooling tower of the present invention has no fillers, and it includes layered and stacked dispersion needle wheels 3 or demisting needle wheels 5, and a liquid spray device 4 in the middle. The needle wheels contain radially layered needle seedlings 15. The needle seedlings 15 are rotated to form a swirling flow with a uniform angular velocity. The cooling tower of the present invention increases the specific surface area and distribution uniformity of the liquid droplets through nozzle dispersion, swirl flow dispersion, and the collision and dispersion of the needle seedlings 15 to the droplets, and the swirl flow also increases the centripetal heat transfer speed of the airflow and enhances heat dissipation. effect and heat dissipation intensity, flatten and radialize the heat dissipation process; it is also possible to stack pinwheels and spray layers in layers, and the cross-flow cooling of the tower body 6 can also be divided into multiple layers at a certain height with the help of the air guide plate 7 to enter the air. It not only increases the temperature drop of the cooling tower but also greatly reduces the floor space of the cooling tower. The cooling tower of the present invention adopts the defogging needle wheel 5 to centrifugally remove the fog, which not only fully completes the water removal, but also allows the spray nozzle to have a wide atomization interval.

A three-claw opening-shrinking machine synchronized through connecting rods comprises a supporting seat, a telescopic arm, a first rotating arm, a second rotating arm, a first jaw, a second jaw, a third jaw, a first connecting rod mechanism and a second connecting rod mechanism, wherein the telescopic arm is connected to the supporting seat and can move up and down; the first rotating arm and the second rotating arm are symmetrically positioned on both sides of the telescopic arm respectively; the first rotating arm and the second rotating arm are rotationally connected to the supporting seat through a first pin shaft and a second pin shaft respectively; the first jaw, the second jaw and the third jaw are connected to the first rotating arm, the second rotating arm and the telescopic arm respectively; the first connecting rod mechanism and the second connecting rod mechanism are symmetrically positioned on both sides of the telescopic arm respectively; the top ends of the first connecting rod mechanism and the second connecting rod mechanism are fixed on the first rotating arm and the second rotating arm through the first pin shaft and the second pin shaft respectively, and the lower ends are hinged together; and the lower end of the telescopic arm is connected to the hinged part of the lower ends of the first connecting rod mechanism and the second connecting rod mechanism. Under the action of an acting cylinder and through the first connecting rod mechanism and the second connecting rod mechanism, the first rotating arm and the second rotating arm rotate around the axial lines of the first pin shaft and the second pin shaft, the telescopic arm moves telescopically on the supporting seat, the first jaw, the second jaw and the third jaw are driven by the first rotating arm, the second rotating arm and the telescopic arm to act simultaneously, and the jaws shrink or open.

The application provides a molten iron tank and a preparation method thereof, belonging to the technical field of molten iron tanks used in the iron and steel industry. In the ladle, the first working layer includes a layer of working bricks. The first casing and the second casing are integrally formed, and the thickness of the casing is 15-25mm. The insulation layer is a layer of clay bricks, and the thickness of the insulation layer is 30-35mm; the permanent layer includes multiple layers of pyrophyllite bricks and multiple layers of second castable layers stacked from bottom to top, and the gap between two adjacent layers of pyrophyllite bricks Pour a second castable layer, the thickness of the permanent layer is 40-60mm. The nano-reflective layer includes a plurality of nano-reflective plates laid on one layer. The nano-reflective plate includes aluminum foil and nano-silica powder wrapped in the aluminum foil. The thickness of the nano-reflective plate is 4-8mm. The second working layer includes two layers of working bricks from outside to inside. The molten iron tank can maintain the volume of the molten iron tank and increase its strength without increasing the weight, and can avoid excessive temperature drop of the molten iron.

The application discloses a cooling device for an aeroengine turbine guide blade, and relates to the cooling of the guide blade. In this application, low-melting point metals or their alloys are used as the working medium, and multiple cooling passages and chambers are arranged in the guide blades. The cooling device includes flow dividers, collectors, heat exchangers and electromagnetic pumps, which form a closed loop with the guide blades. loop, the electromagnetic pump drives the working medium to circulate in the closed loop loop, and the heat is quickly dissipated through the heat exchanger. This application can reduce the instability caused by the mixing of cold and hot air; the application has excellent cooling effect and high heat exchange efficiency, which is beneficial to prolong the service life of the guide vane; this application can improve the strength of the guide vane and reduce the processing time. Process cost; this application preheats aviation kerosene in advance to improve its combustion efficiency; the entire process of this application is closed in cycle, low melting point metals or their alloys can be recycled repeatedly, and have no impact on the environment.