824 results about "Spiral flow" patented technology

The invention relates to the technical field of agricultural machinery, and discloses an adjustable soil covering device for ginger planting, comprising: a mobile vehicle, the front side of the bottom of which is provided with a front wheel matched with the curved surface of a ridge, and the rear side of which is provided with a rear wheel with a ditch edge profiling structure; the central mixing bin is integrally formed in the middle of the mobile vehicle chassis, and a rotatable scattering disc is coaxially arranged in the central mixing bin. The mixing process of soil and fertilizer is innovatively integrated in the central mixing bin, and the fertilizer is sucked from a storage box through a Venturi negative pressure generator in a pneumatic conveying mode; the high-pressure fan provides airflow power to feed the materials into the mixing bin, non-blocking automatic fertilizer supply is achieved, the fertilizer and soil intersect in the bin, the materials are guided to spirally fall down by means of the tapered spiral flow guide column, the mixing path is prolonged, meanwhile, the ultrasonic vibration plate continuously vibrates to form lumps, it is guaranteed that the two materials are highly and evenly mixed, and the mixing efficiency is improved. And a mixed substrate with stable quality is provided for subsequent precise soil covering.

The invention belongs to the field of dies, and particularly relates to a cam cover die-casting die with a spiral cooling structure, a die table mechanism comprises a lower die table and an upper die table which are combined, and a lower die core and an upper die core which are matched with each other are arranged in the lower die table and the upper die table; the pouring mechanism comprises a pouring end seat arranged on the upper mold table, a pouring channel penetrating through the upper mold core is formed in the pouring end seat, and the other end of the pouring channel penetrates into a closed cavity of the lower mold core and the upper mold core; the track mechanism comprises a track table arranged on the outer side of the cavity; the multi-layer structure of the spiral pipe is in direct contact with the outer wall of the cavity, the spiral flowing path of a cooling medium is combined, the heat exchange area and cooling uniformity are increased, the casting deformation risk is reduced, a temperature sensing end base integrated temperature sensor monitors the temperature of the cavity in real time, and the flow of the cooling medium is dynamically adjusted in cooperation with a deformation piece driven by an air bag piece. And intelligent control of slow-cooling anti-cracking in a high-temperature area and rapid-cooling shaping in a low-temperature area is realized.

Belonging to the field of petrochemical engineering, the invention discloses a catalytic slurry oil purification device, which comprises a tank body, and a feed end and a discharge end respectively arranged at two ends of the tank body. An upper partition plate and a lower partition plate are fixedly connected to the inner wall of the tank body, a discharging opening is formed in the upper partition plate, and a feeding opening is formed in the lower partition plate; the interior of the tank body is divided into three independent cavities by the upper partition plate and the lower partition plate; according to the scheme, the filter element is sleeved with the hollow cylinder, and the rotatable first spiral flow deflector is further arranged between the inner wall of the hollow cylinder and the outer wall of the filter element; a rotatable first spiral flow deflector is further arranged between the inner wall of the hollow cylinder and the outer wall of the filter element; a shear force generated by rotation of the first spiral flow deflector can prevent a filter cake on the surface of the filter element from forming a compact thick layer; a filter cake layer can be controlled within a relatively thin thickness range, and the rising speed of the pressure difference is delayed, so that the operation duration of a single filtering period is prolonged; and the single-time continuous treatment capacity of the device is greatly improved.

The invention discloses a support installation angle measuring device for photovoltaic power generation, which relates to the technical field of measurement and comprises an installation position structure, a magnetic field control assembly and a measuring assembly. The installation position structure is arranged at the connection position of a stand column and a cross beam of the photovoltaic support, the connection point of an inclined supporting rod and a main frame and the connection area of a base and a foundation, under the cooperation of the magnetorheological fluid cavity assembly and the magnetic field control assembly and the design of a spiral flow guide groove and a cone frustum cavity, the fluid distribution uniformity is improved, and under the action of a magnetic field, the fluid distribution uniformity is improved. The spiral flow guide grooves guide the magnetorheological fluid to form spiral flow and cooperate with a rotating magnetic field, the support fixing effect is remarkably enhanced, and when the support deviates due to external force, the micro stress sensor of the magnetorheological fluid cavity reversely deduces the angle through shear stress changes and feeds the angle back to the magnetic field control assembly for real-time correction. Therefore, stress is released and deformation is corrected under extreme working conditions such as strong wind and earthquakes, and the accuracy and response speed of angle control and measurement of the support are greatly improved.

The invention relates to the technical field of high-power femtosecond laser manufacturing, and discloses a high-power industrial femtosecond laser water cooling structure and a manufacturing method thereof. Comprising the steps that any one of a variable cross-section spiral flow channel, a bionic fin flow channel or a micro-channel array is directly machined in a machine shell water-cooling plate through the five-axis linkage precision machining technology or the micro-nano machining technology, or the printer shell water-cooling plate is integrated through the metal additive manufacturing technology; a reflector base, a heat dissipation chute and a cooling water channel are integrated in the machining process of the water cooling plate of the machine shell; carrying out material and surface treatment process operation; assembling process operation is carried out, a reflecting mirror base is matched with a mortise and tenon joint structure and a machine shell water-cooling plate through high-precision positioning pins, the reflecting mirror base and the machine shell water-cooling plate are rigidly connected in a vacuum brazing or laser welding mode, and a light guide side plate and a runner cover plate are designed into standard modules; the light guide side plate and the runner cover plate are quickly assembled through magnetic attraction positioning and spring buckles.

The invention discloses a new energy automobile electric compressor preheating structure and a control method, and relates to the technical field of new energy automobile heat management. The method comprises the three steps of heat source collaborative recovery, heat demand dynamic distribution and self-starting collaborative execution, specifically, motor stator waste heat and compression refrigerant waste heat are recovered through a heat conduction fin array and a spiral flow channel, and a shared heat conduction medium is guided in; based on a fuzzy PID controller, a heat flow guide valve is dynamically adjusted to distribute heat flow according to the lubricating oil way temperature, the suction superheat degree and the shell temperature; the generator is triggered to be rapidly heated in a locked-rotor mode at the ultralow temperature, the preheating requirement is pre-judged in combination with a heat attenuation model, the structure comprises a temperature sensor set, a three-way heat flow guide valve and an embedded MCU processor, efficient waste heat utilization is achieved, external energy consumption is not needed, preheating energy consumption is effectively reduced, and the low-temperature starting performance and operation stability of the compressor are remarkably improved.

The invention relates to the technical field of ascites drainage, in particular to an ascites drainage device which comprises a puncture tube, the output end of the puncture tube is fixedly connected with a one-way valve, the output end of the one-way valve is fixedly connected with a separation tube, a drainage opening is formed in the bottom of the separation tube, and the output end of the drainage opening is fixedly connected with a drainage tube. The output end of the drainage tube is fixedly connected with a liquid accumulation bag, a filter cartridge is arranged in the separation tube, and the input end of the filter cartridge is communicated with the input end of the separation tube. The spiral flow deflectors which are uniformly arranged along the central axis are arranged at the input end of the filter cartridge, so that ascites can be guided to form a spiral flowing state, and solid substances are always kept in dynamic distribution of'spirally advancing along the wall 'by virtue of centrifugal force; meanwhile, when the filter cartridge is blocked and the pressure rises to a preset value, the second T-shaped piston rod can extrude the titanium alloy spring to slide, so that ascites enters the hole-free groove to expand the internal space of the filter cartridge, the pressure is balanced, and time is bought for cleaning blockages.

The utility model relates to a smooth copper shell cold roll, which comprises an inner core component and a copper shell component coaxially connected outside the inner core component, a liquid inlet channel and a liquid outlet channel are respectively arranged at two ends of the inner core component, and an annular cavity is arranged in the copper shell component. The liquid inlet channel, the annular cavity and the liquid outlet channel are sequentially communicated and form a one-way cooling flow channel; an impeller rotating along with the liquid inlet channel is installed in the liquid inlet channel and used for driving cooling liquid to flow in the one-way cooling flow channel. Through the design of linkage of the impeller and the roller body, the cooling liquid is driven to flow by using the rotation power of the roller, an external pumping device is not needed, active cooling with zero extra energy consumption is realized, and the energy-saving benefit is remarkable; a spiral flow guide path is matched, so that the heat conduction efficiency and the cooling liquid contact area are greatly improved, and thermal deformation is effectively prevented.

The invention discloses a rotor coaxial heat dissipation structure, a fluorine-containing metal-based lubricating composition and application of cooperation of the rotor coaxial heat dissipation structure and the fluorine-containing metal-based lubricating composition in a motor rotor shaft, and the rotor coaxial heat dissipation structure and gradient functional coatings sequentially formed on the surface of the motor rotor shaft comprise a bottom layer used for leading out winding heat; the transition layer is used for solid lubrication and PFPE heat triggering slow release; the surface layer is used for reducing friction and repairing microcracks; a micro-pit array and a spiral flow guide groove which are machined through laser are formed in the outer portion of the surface layer. According to the invention, a gradient functional coating three-layer synergistic structure is adopted to construct a gradient framework of a bottom layer (a heat conduction band nano reinforced phase), a transition layer (oriented whiskers and slow-release lubrication) and a surface layer (magnetic response self-repairing), so that the problem that heat management, wear resistance and self-repairing functions of a traditional coating are difficult to be compatible is solved; and meanwhile, through the combined design of the laser micro-pit array (liquid storage and resistance reduction) and the spiral flow guide groove (strengthening the flowing of the cooling medium), the heat dissipation efficiency is cooperatively improved.

The invention discloses a waste heat recovery and heat exchange device for a waste mineral oil treatment process, and belongs to the technical field of waste mineral oil treatment device.The waste heat recovery and heat exchange device comprises a shell, the two ends of the shell are each provided with an end plate and an end socket, a shell cavity is defined by the shell and the two end plates, and the two ends of the shell cavity communicate with a shell pass inlet and a shell pass outlet correspondingly; a plurality of two-way pipes are installed between the two end plates, each two-way pipe is in a U shape, the interior of one end socket is divided into a feeding cavity and a discharging cavity in a sealed mode, and one end of each two-way pipe is communicated with the feeding cavity. Through overall cooperation of the U-shaped double-pass tube, the spiral supporting plate, the rotatable turbulent flow structure and the detection regulation and control assembly, a special structure matched with waste mineral oil waste heat recovery is formed, a tube pass heat exchange path can be prolonged through the double-pass tube, a shell pass medium is guided through the spiral supporting plate to form an ordered spiral flow field, and the waste mineral oil waste heat recovery efficiency is improved. And the heat exchange effect can be enhanced by means of a rotatable turbulent flow structure, and dirt attachment is reduced.

The invention discloses two-stage reverse osmosis water treatment equipment, and relates to the technical field of water treatment equipment, the two-stage reverse osmosis water treatment equipment comprises a shell, a flow guide net is arranged in the shell, a reverse osmosis membrane is arranged in the flow guide net, the outer side of the flow guide net is fixedly connected with a side plate, and the inner wall of the flow guide net is fixedly connected with a spiral plate. According to the two-stage reverse osmosis water treatment equipment, the spiral plate arranged on the inner side of the flow guide net can convert linear water flow into spiral rotational flow, and centrifugal force generated by the rotational flow can throw suspended particles, colloids and other impurities in water to the outer side of the flow guide net, so that the contact probability of the impurities and a reverse osmosis membrane is further reduced; meanwhile, the spiral flow channels increase the contact area and contact time of water flow and the surface of the membrane, the permeation efficiency of water molecules is improved, rigid structures of the spiral plates can play a role in supporting the flow guide nets and the reverse osmosis membrane, and side plates arranged on the outer sides of the flow guide nets can realize sealed isolation between adjacent permeation units and prevent water flow mixing among different units.

The utility model relates to the technical field of anti-cavitation horizontal type thick slurry foam pumps, in particular to an anti-cavitation horizontal type thick slurry foam pump which comprises a base, an impeller cover is installed on the top of the base, a three-stage stepped impeller for preventing overlarge local pressure difference caused by instant pressurization of a single-stage impeller is installed in the impeller cover, and the three-stage stepped impeller is installed in the base. The top of the impeller cover is connected with a feeding pipe, and the feeding pipe is provided with a low-pressure-preventing mechanism which is used for preventing a low-pressure area from being generated due to the sudden change of the flow speed when thick slurry raw materials directly enter the impeller, the thick slurry foam is pre-accelerated and rectified through the spiral flow guide plate, and it is ensured that the pressure of a suction cavity is always higher than the saturated vapor pressure of liquid; and meanwhile, under the action of the three-stage stepped impeller, fluid is pressurized step by step, the situation that the local pressure difference is too large due to instant pressurization of a single-stage impeller is avoided, residual bubbles are guided to a low-pressure area through the final-stage pressure relief hole to be slowly released, bubble collapse impact is reduced, and therefore the cavitation prevention effect is achieved.

The invention relates to the technical field of tubular reactors, in particular to a continuous flow tubular reactor which comprises a shell, a plurality of baffle plates and a plurality of medium tubes. A spiral flow channel is defined between the multiple baffle plates and the shell, the medium pipe is arranged on the baffle plates in a penetrating mode through multiple first elastic pieces, the multiple first elastic pieces are evenly distributed in the circumferential direction of the medium pipe, and the first elastic pieces are spiral. According to the continuous flow tubular reactor disclosed by the invention, the flowing path of reactants is changed by utilizing autorotation and axial movement of the baffle plates, the position of a dead zone is continuously replaced, the reactants are prevented from being always accumulated in one zone, and the reaction efficiency is improved; along with the rotation and movement of the baffle plate, when the reactants pass through the space between the medium pipe and the baffle plate, the first elastic sheet generates axial turbulent flow on the reactants passing through the space between the medium pipe and the baffle plate, so that the flow resistance is increased, the probability of insufficient reaction of the reactants is reduced, and the reaction stability is improved.

The invention discloses a lightweight high-strength driving unit shell composite iron alloy casting preparation method, relates to the technical field of composite iron alloy casting, and aims to solve the technical problem of low static standing degassing efficiency, a bottom die and a top die are included, and molten metal enters a cavity formed by the bottom die and the top die to produce a formed casting. Bubbles with the density far smaller than that of molten metal can be gathered towards the center shaft through centrifugal force generated by the spiral flow deflectors, the first cutting blocks are arranged on the outer sides of the arc-shaped plates at the center shafts of the spiral flow deflectors, the gathered bubbles can be cut and crushed for the first time, and the bubble content is preliminarily reduced; the second cutting block at the top of the trapezoidal plate can conduct secondary cutting on tiny bubbles remaining in molten metal, the double degassing cutting structure greatly improves the degassing efficiency, the bubbles in the molten metal are effectively removed, the impact resistance and deformation resistance of the shell are enhanced, key guarantee is provided for the high-strength performance of the shell, and the service life of the shell is prolonged. The problem that static standing degassing efficiency is low is solved.

The utility model provides a hot nozzle with an automatic guide valve needle. The hot nozzle comprises an HD body, a valve needle assembly arranged in the HD body, a hot nozzle body, a nozzle core sleeve, a sealing ring and a heat insulation cap, wherein the sealing ring and the heat insulation cap are located at one end of the HD body; a conical sealing surface and a ceramic lining are arranged at the outlet end of the hot nozzle body; the valve needle assembly is provided with a stepped shaft structure, a conical sealing head and a split type guide sleeve. A graphite self-lubricating layer is arranged on the inner wall of the split type guide sleeve, and the thickness is 0.05-0.2 mm; the dynamic compensation assembly comprises an elastic compensation ring and a floating gap; the radial width of the floating gap is 0.02-0.1 mm, and radial fine adjustment of the guide sleeve is achieved through melt pressure; the elastic compensation ring is a high-temperature alloy spring, and the adjustable range of the pre-tightening force is 50-200N; the spiral angle of the spiral flow guide groove in the inner wall of the ceramic lining is 15-45 degrees, and in practical application, the production and machining time and the system maintenance time can be effectively saved, the valve needle is effectively prevented from being deviated, the overall service life of a system is guaranteed, and the production efficiency of customers is improved.

The utility model relates to the technical field of metallurgical equipment heating furnace roller ways, in particular to a roller way cooling water transformation device capable of prolonging the service life of a bearing. Comprising a cooling water pipe, a thermometer and a water flow control valve, the cooling water pipe is arranged around a roller way, a spiral flow deflector is arranged in the cooling water pipe to divide the roller way into three sections, the thermometer is arranged on one side of the roller way, the water flow control valve is arranged on a water inlet of the cooling water pipe, and the cooling water pipe comprises a water inlet pipe and a water return pipe. The cooling water pipe comprises an inner layer and an outer layer, the inner layer of the cooling water pipe is made of a copper alloy material, and the outer layer of the cooling water pipe is made of a ceramic coating material; according to the roller way cooling water transformation device capable of prolonging the service life of the bearing, the heat dissipation efficiency is improved, the return water temperature is reduced, the service life of the bearing is prolonged, water resource waste is reduced, environmental thermal pollution is reduced, the workshop temperature is reduced, and the locking phenomenon is avoided; the service life of the bearing is prolonged and the annual maintenance cost is reduced.

The utility model belongs to the technical field of hydraulic valves, and discloses an overflow valve. The overflow valve comprises a valve seat and a valve element, the valve seat comprises an oil inlet hole and an oil return hole, the oil inlet hole and the oil return hole are communicated through an oil passing channel, an abutting portion is arranged on the inner wall of the valve seat, and the abutting portion is arranged between the oil inlet hole and the oil return hole. The valve element is movably arranged in the valve seat in the axial direction of the valve seat, the valve element can abut against or be away from the abutting part so as to close or open the oil passing channel, and protrusions are arranged in the circumferential direction of the valve element and are of a waveform structure. Due to the fact that the protrusions of the wave-shaped structure are arranged on the periphery of the valve element, hydraulic oil can spirally flow when passing through the gap between the valve element and the abutting part, turbulent flow and vortex are effectively reduced, the flow resistance coefficient is further reduced, the effect of optimizing a flow field is achieved, and hydraulic noise is effectively reduced.

A portable compressed air filter using a multi-tube cyclone according to one embodiment of the present invention comprises: a housing in which an air flow part is formed and into which compressed air is introduced and discharged; and an impurity separation unit provided in the air flow unit of the housing and separating impurities from compressed air, the impurity separation unit including, in an upper portion thereof: a first cyclone forming unit that centrifugally separates the impurities by causing the introduced compressed air to flow in a swirling flow manner, and a second cyclone forming unit that centrifugally separates the impurities in the swirling flow manner; and a second cyclone forming unit which is provided on the inside of the first cyclone forming unit and which centrifugally separates impurities by causing the compressed air that has passed through the first cyclone forming unit to flow again as a swirling flow.

The invention discloses an injector with an automatic medicine mixing function, and relates to the technical field of medical instruments. Comprising a barrel, a push rod is slidably connected to the inner wall of the barrel, a piston slidably connected to the interior of the barrel is fixedly connected to the bottom end of the push rod, a mixing barrel is arranged at the bottom end of the barrel, multiple sets of spiral flow guide blocks are arranged on the inner wall of the mixing barrel at equal intervals, and an extrusion assembly is arranged between the barrel and the mixing barrel; and a sealing assembly for sealing the injector is arranged in the mixing cylinder. The spiral flow guide block is arranged, so that subsequently extracted liquid medicine flows along the spiral track of the spiral flow guide block and forms stable rotational flow to be premixed with liquid medicine in the mixing barrel, the operation process is simplified, the operation time is saved, the barrel body is turned over, and under the combined action of gravity and negative pressure, the liquid medicine in the mixing barrel is uniformly mixed. The liquid medicine is flushed into the cylinder body in a concentrated and high-speed jet flow state, so that secondary mixing of the liquid medicine is realized, the mixing uniformity is further improved, and the liquid medicine is convenient to fully contact and mix.

The application discloses a TPMS structure micro-channel heat exchanger and a manufacturing method, and belongs to the field of structural design and manufacturing of rocket engine heat exchangers. The heat exchanger core is a plurality of spiral flow channel structures adopting TPMS. The inlet side of a liquid oxygen inlet and outlet collector is connected with the inlet of the core spiral flow channel through a liquid oxygen partition plate, and the outlet side of the liquid oxygen inlet and outlet collector is connected with the outlet of the core spiral flow channel. A fuel gas inlet pipeline is connected with the inlet of the core spiral flow channel through a fuel gas partition plate, and a fuel gas outlet pipeline is connected with the outlet of the core spiral flow channel. The liquid oxygen partition plate and the fuel gas partition plate are each provided with a plurality of through holes, the through holes correspond to the spiral flow channels in the core one by one, and each through hole is connected with the inlet of one spiral flow channel in the core. The application adopts the TPMS spiral flow channel structure to increase the internal heat exchange area of the heat exchanger and improve the heating efficiency of the heat exchanger on fuel in the working process of the engine.

The application discloses a double-station cooperative glass numerical control groove milling equipment and relates to the milling technical field.The equipment comprises a numerical control machine tool main body and two groove milling units arranged on the numerical control machine tool main body.Each groove milling unit comprises a moving seat and a rotating driving assembly arranged on the moving seat.The bottom of the rotating driving assembly is provided with a milling cutter.In the application, a reverse conical funnel-shaped liquid collecting cover which rotates synchronously with the milling cutter is arranged to wrap the cutting area, effectively isolating the radial annular airflow generated by the high-speed rotating cutter.Meanwhile, after the cooling liquid is sprayed from the nozzle, the cooling liquid enters a spiral flow guide groove which is opposite to the rotating direction of the cutter, and forms a downward converging spiral liquid film under the constraint of airflow inertia and the groove wall, guiding the milling end of the cutter, so that the problem that the cooling liquid is blown away from the cutting area by the centrifugal airflow is solved, and the cooling liquid is ensured to efficiently act on the core area.

This invention discloses an energy-saving pole centrifugal device, belonging to the field of pole processing technology. It includes a support frame, with a centrifugal mechanism at the top of the support frame. The centrifugal mechanism includes a centrifugal cylinder rotatably mounted at the top of the support frame. A third motor is fixedly mounted at the top of the support frame, and a gear is fixedly mounted on the output shaft of the third motor. A limit assembly is provided on the outside of the centrifugal cylinder, and a gear ring is fixedly mounted on the outside of the limit assembly, with the gear meshing with the gear ring. A flow guiding mechanism is provided near the top of the centrifugal cylinder on the support frame. This invention, through the synergistic effect of sliding spiral flow guiding ribs on the inner wall of the centrifugal cylinder and a spiral stirring plate on the outside of the hollow column, can both prevent the concrete aggregate from being sheared and damaged, and fully agitate the concrete, promptly expel internal air bubbles, break the stratification interface of sand, cement slurry, and water during centrifugation, reduce defects such as inner wall laitance, honeycomb, and holes, and significantly improve the pole forming quality and structural stability.

The utility model relates to an anti-blocking well drilling sleeve joint, and belongs to the technical field of well drilling sleeve joints. The anti-blocking drilling casing joint comprises a first pipeline, a threaded lantern ring, a first joint, a second joint and a second pipeline, one side of the first pipeline is in meshed connection with the first connector through threads, the connection strength and the sealing performance are guaranteed, the end face of the first connector is machined through a mirror face machining technology, the flatness of the attaching face of the first connector and the second connector is high, and detention of rock debris is effectively reduced, and right-handed spiral flow guide lines are formed in the inner walls of the first pipeline, the second pipeline and the connectors. The thread sleeve ring is made of a duplex stainless steel material, trapezoidal threads matched with external threads of the second connector are machined on the inner wall of the thread sleeve ring, pre-tightening force is applied through rotary meshing, the compression amount of the sealing ring is accurately increased, and the self-cleaning sealing ring is particularly suitable for a shale gas horizontal well. And the rock debris passing efficiency is greatly improved compared with that of a traditional connector.

This utility model relates to the field of pipeline technology, specifically to a compressor venting and noise reduction pipeline and its noise reduction system. The compressor venting and noise reduction pipeline includes: an exhaust pipeline, a bend downstream of the exhaust pipeline, a branch pipeline downstream of the bend, an output pipeline downstream of the branch pipeline, and a silencer downstream of the output pipeline. The silencer includes a spiral flow guiding device. This utility model reduces the velocity of the medium flow by using the bend, branch pipeline, and silencer, consuming part of the kinetic energy of the medium flow, thereby reducing the noise generated by the medium colliding with the pipe wall during discharge and reducing the safety risks to on-site personnel.

The invention discloses a through-flow cooling structure and system in a hollow shaft of a flywheel energy storage rotor. The structure comprises a closed oil discharge pool located at the bottom of a vacuum sealing shell and a heat exchange coil communicated with an external cold source. The inner wall of the motor rotor hollow shaft is axially stacked with slotted stacked discs, and the slotted stacked discs are staggered to form a spiral stepped flow channel from top to bottom; the in-shell vertical vacuum oil pump lifts oil to the top of the hollow shaft through the oil supply pipe, the oil is evenly distributed to flow into the spiral flow channel under the action of the dynamic seal and the oil receiving annular structure, and after heat exchange, the oil flows back to the oil discharge pool through the oil discharge annular structure and an annular gap in the outer side of the oil supply pipe. During working, oil returns into a channel through the top, flows through from top to bottom and exchanges heat with the hollow shaft / stacked disc in an enhanced manner, and return oil exchanges heat with an external cold source in an oil discharge pool to form closed circulation. The rotor temperature rise and thermal gradient can be remarkably reduced while vacuum integrity is kept, the pressure drop is reduced, the operation reliability is improved, and the rotor structure is suitable for a high-rotating-speed and high-energy-density flywheel system.

The utility model relates to the technical field of aluminum ladle liners, and discloses an aluminum ladle liner structure, a liner body is arranged in a ladle body, a sealing cover plate is arranged at the top of the ladle body, a pressure relief valve is fixedly connected to the top of the sealing cover plate, and a spiral guide plate with a plurality of air outlet holes is arranged in the liner body, so that the pressure relief valve is fixedly connected to the top of the sealing cover plate. During work, an external air pump injects gas into the cavity of the spiral flow guide plate through the heat-resistant gas injection pipe and the air inlet channel, the gas is sprayed out of the air outlet holes to push molten aluminum to flow, the spiral flow guide plate guides the molten aluminum to do spiral motion, and a spiral flow field is formed; the spiral flow field and a flow field generated by gas injection are mutually overlapped, axial and radial flow of molten aluminum is strengthened, stirring dead angles are effectively reduced, the molten aluminum circulates more sufficiently in the ladle, stirring is more uniform, temperature distribution of the molten aluminum is optimized, surface solidification of the molten aluminum is avoided, and the quality of the molten aluminum is improved.

This invention discloses a high-fluidity, low-casting-defect, and high-strength-toughness Al-Zn alloy and its preparation method, relating to the field of high-performance aluminum alloy materials in aerospace and transportation. The high-fluidity, low-casting-defect, and high-strength-toughness Al-Zn alloy, by mass percentage, comprises the following components: Zn: 5.3-7.3%, Mg: 2.4-3.3%, Cu: 1.4-2.0%, Ni: 0.3-1.3%, Ti: 0.05-0.5%, Zr: 0.03-0.3%, Mn: 0.01-0.2%, Si: ≤0.07%, with Ti and Zr added at a mass ratio of 1-1.5:1. The content of any single impurity is ≤0.03%, and the total impurity content is ≤0.1%, with the balance being aluminum and non-removable impurities. By controlling the content of the main alloying elements and microalloying, the fluidity of the alloy can be improved and casting defects reduced. High-strength and high-toughness alloys can be obtained through heat treatment. The invented alloy has an average spiral flow channel length of ≥700mm, tensile strength of ≥710MPa, yield strength of ≥630MPa, and elongation of ≥8%.

The utility model relates to the technical field of drying equipment, in particular to a crystalline salt drying device which comprises a drying cavity, two hollow paddle shafts and a driving device, the two hollow paddle shafts are rotatably arranged in the drying cavity in parallel, and the driving device is in transmission connection with the two hollow paddle shafts and drives the two hollow paddle shafts to synchronously rotate in opposite directions. And long paddles and short paddles are alternately arranged on the hollow paddle shaft along the axis direction. The drying uniformity and efficiency of high-viscosity crystallized salt slurry are remarkably improved through reverse synchronous rotation of the double shafts and alternate layout of asymmetric paddles in combination with the design of reverse spiral flow guide grooves.

The invention provides a fry adaptive domestication system and method based on multidirectional flow impact exercise, and relates to the technical field of fishery breeding, the system comprises three-section domestication pool bodies, the domestication pool bodies are detachably connected through flange plates, the bottom of each domestication pool body is fixedly connected with a supporting column, the upper portion of each supporting column is fixedly connected with a supporting seat, and the supporting seat is fixedly connected with the bottom of the corresponding domestication pool body. A motor is arranged on the upper portion of the supporting seat, a third bevel gear is fixed to the output end of the motor, and a connecting assembly facing the side wall of the domestication pool body in the radial direction is meshed with the third bevel gear. The invention provides a multi-directional flow impact training structure, which enables the fry to swim back and forth, turn and avoid and the like in radial, annular and spiral flow, the caudal peduncle muscle fiber density is improved by 20-30%, the swimming speed is improved by 40% compared with that of the traditional domesticated fry, the anti-countercurrent ability intensified training in the three-dimensional space of the fry is realized, and the endurance, explosive power and turning flexibility of the fry are improved in a balanced manner.

This invention provides a novel PTC steam generator, comprising a PTC heating core. The end of the PTC heating core furthest from the outlet is connected to a flow channel frame. After connection, the PTC heating core is installed inside a housing. A sealing ring is installed at the outlet end of the housing, followed by a sealing device. The housing has a liquid inlet and a gas outlet. The flow channel frame has spiral flow channel ribs centered on the PTC heating core. These ribs, along with the outer surface of the PTC heating core and the inner surface of the housing, form a spiral liquid flow channel, ensuring sufficient contact between the liquid and the PTC heating core to generate gas. Compared to existing technologies, the advantages of this invention are: the spiral flow channel ribs centered on the PTC heating core maximize the utilization of the PTC heating core's surface to create a liquid flow channel, ensuring sufficient contact between the liquid and the heat source PTC heating core to generate gas, thus improving product performance.