113 results about "Jet cooling" patented technology

The application discloses a kind of through tool turret-lathe tool ultra-low temperature medium internal spray type cooling numerical control lathe, including inclined bed lathe host, ultra-low temperature medium heat insulation transmission control system, ultra-low temperature medium internal spray type tool turret and ultra-low temperature medium internal spray type lathe tool.The ultra-low temperature medium internal spray type tool turret and ultra-low temperature medium internal spray type lathe tool realize that ultra-low temperature medium is transported to the cooling of tool tip by the inner cavity channel of tool turret-tool, solve the integration problem of liquid nitrogen internal spray type cooling function and conventional lathe structure;Ultra-low temperature medium internal spray type lathe tool tail end uses telescopic transmission pipe, realizes the directional supply of ultra-low temperature medium to working lathe tool when automatic tool changing;Ultra-low temperature medium transmission pipeline passes through from the spindle center of ultra-low temperature medium internal spray type tool turret, and adopts vacuum heat insulation structure, without affecting original structure, ensure the heat insulation transmission of medium;Ultra-low temperature medium control system and the integration of numerical control machine tool, realize the stable controllable of pressure and flow in ultra-low temperature medium transmission process.

The invention discloses a directional heat dissipation power distribution cabinet with adjustable air deflectors, which relates to the technical field of equipment for power distribution cabinets and comprises a cabinet body and a heat dissipation unit arranged in the cabinet body. The heat dissipation unit comprises a directional heat dissipation assembly used for carrying out fixed-point jet cooling on key heating elements, an air guide assembly used for optimizing overall airflow organization in the cabinet, and a water cooling assembly used for carrying out pre-cooling on cooling airflow of the directional heat dissipation assembly. The directional heat dissipation assembly comprises a fan at least arranged on the top wall in the cabinet body, an air supply pipe communicated with an outlet of the fan, and an annular air pipe arranged in the power distribution cabinet and communicated with the air supply pipe. Through cooperation of the directional heat dissipation assembly and the water cooling assembly, air blown out of the air blowing pipe at the tail end of the telescopic air column is no longer ambient temperature air but low-temperature cold air cooled in advance through the liquid cooling system. According to the pre-cooling type directional air supply mechanism, the heat dissipation efficiency and the limit capacity of air cooling are greatly improved.

The invention relates to an ultrasonic atomization pulse type cold air jet cooling and lubricating device and an operation process thereof. The device comprises an air compressor, a cold air generator, a gas storage tank, a pulse control valve and an ultrasonic atomization nozzle module which are sequentially connected through a gas pipeline. The ultrasonic atomizing nozzle module comprises an ultrasonic transducer, a stepped amplitude-variable rod, a waterproof cover, a sealing cover and a focusing nozzle. In the working process, the stepped amplitude-variable rod amplifies the high-frequency mechanical vibration amplitude of the ultrasonic transducer, and cutting fluid is efficiently atomized into micron-sized liquid drops through the cavitation effect and the capillary wave effect; meanwhile, the cold air generator converts high-pressure air provided by the air compressor into low-temperature gas and temporarily stores the low-temperature gas in the gas storage tank, and the low-temperature gas is released in a pulse mode through the precise pulse control valve according to the set frequency and duty ratio. The pulse low-temperature gas enters the sealing cover to be fully mixed with the atomized liquid drops, uniform gas-liquid two-phase jet flow is formed, finally, the jet flow is accelerated by the focusing nozzle to form high-speed convergent jet flow, the high-speed convergent jet flow acts on a cutting area accurately, and pulse type efficient cooling and lubricating cutting machining is achieved.

The present invention provides a two-phase jet cooling radiator for high-power density chips, belonging to the technical field of chip cooling and heat dissipation. The cooling radiator includes a coolant cavity housing, a jet manifold layer, a jet flow channel plate, and a porous medium layer; a liquid distribution cavity is formed in the coolant cavity housing; a jet cavity is formed in the jet manifold layer, and jet holes are uniformly distributed on the jet cavity; the jet flow channel plates are all installed in the jet cavity, and their jet flow channels are all arranged vertically, and one end of each jet flow channel is connected to the corresponding jet hole; the gaps between the jet flow channel plates in the lower space of the jet cavity are filled with the porous medium layer. The present invention utilizes the influence of the small-aperture porous medium layer on bubble dynamics, improves the critical heat flux density in the heat dissipation process, increases the heat dissipation per unit area, prolongs the working life of the chip, improves the working stability of the chip, and plays an important role in ensuring the stable operation of the chip under the working conditions of high heat flux density and high integration.

The invention discloses a dynamic thermal protection device using a pulsed jet cooling technology and a control method.The dynamic thermal protection device comprises a pulsed jet cooling system, a liquid storage tank, a deflation valve, a mass flow controller and an electromagnetic valve pulsed jet excitation device, the liquid storage tank provides liquid nitrogen, and after being adjusted through the deflation valve and the mass flow controller, the liquid nitrogen flows into the electromagnetic valve pulsed jet excitation device; and finally, the water is sprayed to the surface of the photoelectric equipment chip for cooling. The device predicts the temperature change of the chip through a neural network algorithm, dynamically adjusts the frequency and intensity of the pulse jet flow, and achieves the precise cooling of the surface of the photoelectric equipment chip. The dynamic thermal protection device is compact in structure, easy to machine and assemble, convenient to use and low in cost, the space station optoelectronic equipment can achieve self-adaptive adjustment of the heat dissipation capacity according to the temperature of the space station optoelectronic equipment, and stable operation of the equipment is ensured.

The invention discloses a multi-mode composite heat dissipation energy storage battery pack, and relates to the technical field of heat management of energy storage batteries. The device comprises an immersion box, wherein a liquid inlet communicated with an inner cavity of the immersion box is formed in the side wall of the immersion box; a heat dissipation channel is formed in the bottom wall of the immersion box, a plurality of flow guide openings communicating with the heat dissipation channel are formed in the upper end face of the bottom wall, and a liquid outlet communicating with the heat dissipation channel is formed in the side end face of the bottom wall; the jet cooling assembly comprises a liquid guide pipe and a plurality of nozzles, the plurality of nozzles are in one-to-one correspondence with the plurality of liquid outlet holes, the liquid inlet end of each nozzle is communicated with the corresponding liquid outlet hole, and the liquid spraying end extends to the inner cavity of the upper part of the immersion box so as to spray the side wall of the battery module; and the multiple liquid level control valve assemblies are correspondingly installed in the multiple flow guide openings. According to the invention, the battery module can be efficiently cooled in all directions through a plurality of mixed heat dissipation modes such as jet cooling, immersion cooling, bottom heat dissipation and the like, the heat dissipation efficiency is improved, and the temperature consistency of each part of the battery is ensured.

The invention relates to the technical field of control engineering, and discloses a synthesis kettle internal efficient cooling circulation method and system.The synthesis kettle internal efficient cooling circulation method comprises the steps that the rotation speed of inner blades and outer blades of a synthesis kettle corresponding to a multi-stage spiral flow guide assembly is defined, and initial parameters of a synthesis kettle corresponding to a dynamic jet cooling module are configured; partitioning the synthesis kettle to obtain partitioned synthesis kettles, analyzing a temperature gradient matrix of the partitioned synthesis kettles, and determining a local overheating area of the synthesis kettle; position mapping is conducted on the local overheating area and the multi-stage spiral flow guide assembly, a mapping spiral blade is obtained, and the rotating speed difference of the mapping spiral blade is calculated so as to determine a rotating speed regulation and control instruction of the mapping spiral blade; and marking a target adjusting nozzle of the dynamic jet cooling module in the local overheating area, determining an angle regulation instruction of the target adjusting nozzle, and executing internal efficient cooling of the synthesis kettle based on the rotating speed regulation instruction and the angle regulation instruction. The internal temperature control effect of the synthesis kettle can be improved.

The present application relates to the technical field of rail production process, in particular to a production method for improving wear resistance of channel rail for tram. After universal rolling, compressed air is applied to the channel rail for forced cooling in parts. In the first stage, supersonic air jet cooling is applied to the rail head tread, rail head running edge, rail head left side, rail lip and rail bottom to control the cooling speed of each part. In the second stage, supersonic air jet cooling is continuously applied to each part of the rail to control the cooling speed of each part. In the third stage, subsonic air jet cooling is applied to each part of the rail to control the cooling speed of each part, and then the rail is naturally cooled in air. The quenching effect of the channel rail tread and running edge is improved, the pearlite interlamellar spacing is refined, the rail strength and hardness are improved, and the channel rail has good wear resistance.

This invention provides a solar-powered full-spectrum frequency-division thermo-electric combined-drive air conditioning system and its control method, belonging to the field of solar heat pumps. It addresses the problems of existing solar-powered jet-compression combined refrigeration systems, which cannot effectively utilize all wavelengths of solar energy, suffer from intermittent instability during power supply, and exhibit low cooling efficiency due to excessively high compression ratios under high temperature difference conditions. During conventional cooling, the system allows selection of single-jet cooling, single-compression cooling, jet-compression combined cooling, or dual-jet-compression combined cooling based on daytime or nighttime conditions and cooling requirements, achieving stable all-weather air conditioning while saving energy. In addition to the conventional cooling mode, a dual-jet-compression cooling mode can be operated to achieve high temperature difference cooling while maintaining a constant compression ratio. It fully utilizes solar thermo-electricity for self-generation and consumption, enabling switching between jet and compression air conditioning modes to ensure all-weather air conditioning needs while achieving energy conservation and emission reduction.

The invention provides a dry ice jet cooling and cold and heat supply combined system for an electric vehicle driving mechanism. The dry ice jet cooling and cold and heat supply combined system comprises a compressor unit, a heat exchanger outside a compartment, a heat exchanger inside the compartment, a heat regenerator and a gas-liquid separator. An outlet of the compressor unit is simultaneously connected with the heat exchanger outside the compartment and the heat exchanger inside the compartment, the other connectors of the heat exchanger outside the compartment and the heat exchanger inside the compartment are respectively and simultaneously connected with an in-pipe inlet and a shell side outlet of the heat regenerator, and an in-pipe outlet of the heat regenerator is connected with a gas-liquid two-phase fluid inlet of the gas-liquid separator through an expansion valve. A gas outlet of the gas-liquid separator is connected with the compressor unit, a liquid outlet of the gas-liquid separator is connected with the nozzle, and the nozzle extends into the electric automobile driving mechanism. According to the technical scheme, the driving mechanism of the electric automobile is cooled through sublimation heat absorption of the dry ice, meanwhile, air conditioner cooling in the automobile in summer is achieved through residual cold generated by sublimation of the dry ice, and heat generated by high-temperature exhaust of the compressor is recycled for heating in the automobile in winter.

The invention is directed to a sample support design and sample cooling devices for single-particle cryo-electron microscopy that simplify sample preparation and handling, dramatically reduce errors and improve outcome reproducibility, and dramatically reduce overall costs. A system includes a grid based sample support system, grid handling tools, grid blotting tools, a plunge cooling system, and jet cooling systems.

The application relates to a bipolar accelerated ultrasonic vibration atomized jet cooling device and an operation process, the device is divided into three coaxially arranged sections, and the outer shells of adjacent sections are connected through threads. Among them, a piezoelectric ceramic transducer of a first section nozzle is connected with a variable amplitude rod of a second section nozzle, a mesh nut is connected at the front end of the variable amplitude rod, and a guide vane is arranged between the second and third section nozzles and outside the mesh nut; the third section nozzle comprises a stepped inner cavity and a conical outer cavity, and an annular gap is formed between the two for guiding pressure gas. After the ultrasonic signal is connected, the piezoelectric transducer generates mechanical vibration, the variable amplitude rod amplifies and transmits the vibration to the mesh nut; the cutting fluid flows to the front end of the variable amplitude rod, and uniform atomized droplets are formed in front of the mesh nut. Under the guidance and pressurization of the guide vane and the annular gap, the high-pressure gas carries the fine atomized droplets to be uniformly, efficiently and high-speed sprayed, and the cutting processing area is effectively reached.

A mold with a point spray cooling system includes a module provided with a first cooling groove and a second cooling groove; it is characterized in that it also includes a first point cooling assembly and a second point cooling assembly arranged on the module; the first point cooling assembly includes a first refrigerant transmission channel, a first refrigerant nozzle and a first plug block covering the notch of the first cooling groove, the first plug block is provided with a first block channel connected to the first cooling groove, one end of the first refrigerant nozzle passes through the first block channel and extends into the first cooling groove, and the other end is connected to the first refrigerant transmission channel; the second point cooling assembly includes a second refrigerant transmission channel, a second refrigerant nozzle Tube and a second plug block covering the slot of the second cooling groove, the second plug block is provided with a second block channel connected to the second cooling groove, one end of the second refrigerant nozzle passes through the second block channel and extends into the second cooling groove, and the other end is connected to the second refrigerant transmission channel; the first block channel is connected to the second block channel, the first refrigerant transmission channel can be used to supply refrigerant to the first refrigerant nozzle, or to recover the waste refrigerant flowing into the first refrigerant nozzle; the second refrigerant transmission channel can be used to supply refrigerant to the second refrigerant nozzle, or to recover the waste refrigerant flowing into the second refrigerant nozzle.

The utility model discloses a jet cooling device for aluminum alloy processing, which comprises a base, a support frame is fixedly mounted at the top end of the base, a T-shaped track is arranged on the surface of the bottom end of the support frame, a T-shaped sliding plate is mounted in the T-shaped track in a sliding manner, a C-shaped ring is fixedly mounted at the bottom end of the T-shaped sliding plate, and the C-shaped ring is fixedly mounted on the top end of the T-shaped sliding plate. A plurality of spraying heads are movably installed on the surface of the inner wall of the C-shaped ring, and a clamping table is fixedly installed on the surface of one side of the supporting frame. The swinging plate is driven by the servo motor to rotate, so that the surface of the filter screen is scraped by the swinging plate, chips on the surface of the swinging plate are scraped into the chip collecting groove by the swinging plate and enter the chip box through the chip collecting groove, the chips are collected by the chip box, and the chip collecting efficiency is improved. Chippings are prevented from being accumulated on the surface of the filter screen to influence the filtering efficiency of the filter screen, and when the chippings need to be cleaned, the chippings in the chipping box can be poured out only by pulling out the chipping box from the outer surface of the base.

The present invention belongs to the technical field of two-phase flow evaporation heat dissipation devices, and particularly relates to a two-phase flow evaporation heat dissipation device based on the impact of a micro-jet gas array on the liquid surface, which includes a housing. A heat dissipation chamber is provided inside the housing, and a thin liquid layer is arranged inside the heat dissipation chamber. A plurality of jet holes located at the upper end of the heat dissipation chamber are provided on the housing, and the lower ends of the jet holes are communicated with the heat dissipation chamber. A ventilation groove communicated with the heat dissipation chamber is provided on the peripheral side of the housing. A retention chamber located at the upper end of the heat dissipation chamber is also provided inside the housing, and the upper ends of the jet holes are communicated with the retention chamber. An air inlet communicated with the retention chamber is provided at the upper end of the housing. The present invention can combine jet cooling and thin liquid film evaporation cooling for two-phase flow cooling, and at the same time give full play to the advantages of the two cooling methods, enabling the liquid to achieve efficient phase change heat transfer at a temperature below the boiling point, creating a high-intensity evaporation heat dissipation environment, and achieving a better heat dissipation effect.

To provide a pin-collision jet cooling structure for a turbine component and a gas turbine including the same.SOLUTION: An air foil for a turbine blade or a turbine vane includes: a cooling flow passage cavity formed inside the air foil; an insert inserted into the cooling flow passage cavity and having a plurality of cooling holes; and a cooling structure formed between an outer surface of the insert and an inner surface of the cooling flow passage cavity. The cooling structure includes: support parts each coming into close contact with the outer surface of the insert and having a plurality of collision jet holes communicating with the plurality of cooling holes; and cooling pins each coupled to a space between a lower surface of the support part and the inner surface of the cooling flow passage cavity.SELECTED DRAWING: Figure 7

The invention relates to the technical field of new energy storage and micro-grid control, and discloses an energy storage device and method for an offshore wind-light-fish complementary system, and the device comprises a battery module, a power conversion system, an energy management system, a temperature control system, and a high-voltage box. The battery module is arranged in the middle and has a sealed liquid cooling structure, the power conversion system is used for electric energy conversion, and the energy management system is used for cooperatively scheduling charging and discharging based on wind-light-fish multi-source data; a heat preservation, dehumidification and explosion-proof mechanism is integrated in the device, and a temperature control system is accurately adjusted through a closed loop; the method includes multi-energy scheduling, thermal management, power quality control and black start. Through dew point control dehumidification and directional jet cooling, the problem of large temperature difference between offshore high-humidity condensation and the battery is effectively solved; and the harmonic elimination algorithm is combined to optimize modulation, so that the electric energy quality, the power supply stability and the adaptive capacity of the system under severe working conditions in a weak power grid are improved.

This invention provides a liquid-cooled chassis that, in an immersion system, utilizes jet cooling technology to disperse the coolant, thereby achieving uniform heat dissipation and improving heat dissipation efficiency. Specifically, the liquid-cooled chassis includes a cover plate; a main board, which includes a printed circuit board, heat-generating components, and heat sinks; a liquid inlet unit, which includes an inlet pipe and an inlet port, the inlet port being disposed on the chassis, with one end of the inlet pipe leading into the chassis through the inlet port; and a liquid outlet unit, which includes an outlet pipe and an outlet port, the outlet port being disposed on the chassis, with one end of the outlet pipe leading out of the chassis through the outlet port; characterized in that the liquid-cooled chassis further includes a flow guide block, which is disposed on the cover plate or the main board.

The application relates to the technical field of power grids, in particular to a converter cabinet structure which comprises a cabinet body, a plurality of accommodation spaces are separated in the cabinet body; a first accommodation space is separated into an upper heat dissipation area and a lower heat dissipation area which are stacked in an up-down mode by a horizontal partition plate; a plurality of flow guide plates which are parallel to each other and are arranged in the transverse direction of the cabinet body, the flow guide plates and the horizontal partition plate and the top plate, the front wall and the side wall of the first accommodation space jointly define a plurality of strip-shaped air ducts, through the strip-shaped air ducts which change in the transverse direction and the cooperation of the shunt flow guide structure and the flow leakage gap design, the accurate matching of the heat dissipation resources and the heat source density is realized, the turbulence and the heat dissipation dead zone in the wide cavity can be effectively eliminated while ensuring that the mass flow deviation of each air duct is less than 8%, and the core area temperature difference is reduced; on the basis of improving the functional integration degree of the unit space, the upper and lower layers are combined with the independent heat dissipation paths, the high-opening-rate pulling module tray with the jet cooling effect and the parallel architecture of the multiple accommodation spaces.

The present invention discloses a dual-power heating fixture capable of batch heat treatment, comprising a DC heating unit, an induction heating unit, an air cooling unit, and a water cooling unit. The DC heating unit is composed of a lower base, an upper disc seat, and a clamping unit mounted on the lower base and the upper disc seat. On the one hand, the clamping unit can be used to achieve batch clamping of rod-shaped or plate-shaped specimens. On the other hand, DC heating of the specimens is achieved by energizing the lower base and the upper disc seat with a thermal simulation device. Simultaneously, the present application also designs an induction heating unit to achieve dual-power heating. An air cooling unit is integrated into the induction heating unit for jet cooling of the specimens. A water cooling unit is disposed between the lower base, the upper disc seat, and the induction heating unit; it is used to cool the lower base and the upper disc seat and also to cool the coil of the induction heating unit itself. Therefore, the fixture designed in the present application can achieve dual-power heating of DC heating and induction heating, and can also achieve batch clamping of rod-shaped or plate-shaped specimens.

The invention relates to a phase change cooling system and a cooling method, in particular to a spray phase change cooling system and a cooling method for a laser crystal, and aims to solve the technical problem that a single-phase working medium cannot effectively cool the laser crystal in the prior art. An aerial fog mixing cavity of the system comprises a steady flow section and a mixing section, and the small end of the steady flow section is connected with the small end of the mixing section; the cooling liquid atomization assembly is connected with the large end of the mixing section through an atomization connecting hole, and the airflow jet flow assembly is connected with the large end of the mixing section through a plurality of air supply holes; a jet flow baffle is arranged at the large end of the flow stabilizing section, and a plurality of impact holes are formed in the jet flow baffle. After atomized liquid drops generated by the cooling liquid atomizing assembly and gas generated by the gas flow jet assembly are mixed in the mixing section, the gas drives the atomized liquid drops to penetrate through the flow stabilizing section and be ejected out of the impact hole to form cooling jet flow. Atomized liquid drops in the cooling jet flow are subjected to phase change after heat exchange with the impact target surface heat sink, and are gasified to realize cooling of the laser crystal; the method is applied to the system.

The present application relates to the field of compressed gas cooling cooling jet form, specifically sets a kind of parameterized control system and method for gas jet cooling metal cutting area.A kind of parameterized control method for gas jet cooling metal cutting area, according to the diameter of cooling jet Mach disc end is determined as required, preliminary setting the front-end parameter of cooling jet.The actual position of the end of Mach disc under this parameter, diameter and the stagnation pressure of the position are measured respectively.Combined with the calculation model constructed to calculate the coefficient k and α in the calculation model.Again by adjusting the front-end parameter pressure and the size of nozzle aperture, until the diameter of Mach disc end is adjusted to meet the actual requirement.On this basis, the size of mass flow is adjusted to adjust the temperature of jet, until the temperature of Mach disc end meets the minimum requirement of cooling.Through the above parameter adjustment idea, the area of jet cooling capacity strongest can be fully utilized to rapidly and uniformly cool the heat generation area of metal cutting area.

The invention discloses a jet liquid cooling heat dissipation device for chip cooling, and belongs to the technical field of chip cooling, the jet liquid cooling heat dissipation device comprises a jet cooling mechanism capable of being installed on a circuit board chip, the jet cooling mechanism comprises a cover body, a flow guide defoaming assembly and a jet assembly are arranged in the cover body and are communicated with each other, and the jet assembly comprises an annular groove body and a bottom cover. A plurality of groups of nozzles are arranged on the inner edge of the annular groove body, and the plurality of groups of nozzles are a first group of nozzles, a second group of nozzles and a third group of nozzles in sequence from top to bottom in the vertical direction. In the heat dissipation process, cooling liquid gathers towards the center in a vortex mode and is sucked nearby to accelerate backflow, the turbulent flow problem caused by multiple nozzles is effectively solved, the air resistance occurrence probability is reduced, efficient and stable heat dissipation is guaranteed, the spraying angle is increased along with temperature rise of a chip, the flow path is optimized, and the heat dissipation efficiency is improved. And the appearance of a static liquid film is effectively inhibited, the condition of hot spots is avoided, and the heat load is better adapted.

The utility model discloses an angle adjusting type jet cooling pipe which comprises an angle adjusting pipe, one end of the angle adjusting pipe is fixedly connected with a butt joint pipe section, the other end of the angle adjusting pipe is fixedly connected with a transition pipe section, an inner pipe section is arranged in the angle adjusting pipe, one end of the inner pipe section is fixedly connected to the butt joint pipe section, and the other end of the inner pipe section is fixedly connected to the transition pipe section. One end of the inner pipe section is fixedly connected to the inner wall of the angle adjusting pipe, the other end of the inner pipe section is fixedly connected to the transition pipe section, connecting blocks are arranged outside the inner pipe section, one end of each connecting block is fixedly connected to the outer wall of the inner pipe section, the other end of each connecting block is fixedly connected to the inner wall of the angle adjusting pipe, and the connecting blocks are evenly distributed around the inner pipe section. According to the angle-adjustable jet cooling pipe, the angle-adjustable pipe is combined with the inner pipe section, the angle is adjusted by the angle-adjustable pipe, and the contact surface of the inner pipe section and cooling fluid is ensured to be smooth, so that the conveying efficiency of the cooling fluid is improved, and the condition of impurity accumulation is avoided.

This invention discloses an underwater cooling process that enhances the coupling properties of thermoplastic composites, belonging to the field of composite material processing technology. For thermoplastic composite parts that have just been removed from the mold and are in a high-temperature state, a specific cooling solution is used for jet cooling through an optimized nozzle system. The core of this process lies in the synergistic effect of forced convection, phase change cooling, and dynamic heat conduction. This rapidly reduces the overall temperature of the part (suppressing the formation of large-sized spherulites) while mitigating the temperature gradient in the interfacial region, promoting the full diffusion and entanglement of polymer chains to the surface of the reinforcing fibers within the viscous flow window, thereby optimizing interfacial bonding. By balancing crystallinity and residual stress, this process can increase the interfacial shear strength (IFSS) of the composite material by 15-20%.

The invention relates to the technical field of thermal protection of high-temperature parts of hypersonic flight vehicles, in particular to a periodic swing type jet impingement cooling structure of a scramjet engine based on the coanda effect. Comprising a fluid oscillation jet flow hole structure, a combustion chamber wall face cooling channel and a fuel distribution and recovery device. The combustion chamber wall face cooling channel comprises a cooling channel body, a confluence cavity is formed above the cooling channel body, and a plurality of fluid oscillation jet hole structures are formed in the position, corresponding to the cooling channel body, of the bottom of the confluence cavity. The fuel flow dividing and recycling device is composed of a plurality of flow adjusting devices on a fuel pipeline, and a fuel inlet and a confluence cavity inlet are jointly connected with a fuel pump and a fuel tank through the fuel pipeline. Unpowered periodic swing type jet cooling is adopted, a jet channel is combined with a fluid oscillator, periodic swing of jet is driven through the fluid pressure difference and the coanda effect in the engine, use of extra power equipment is avoided, system complexity is reduced, and cooling efficiency is improved.

The application relates to the technical field of battery cooling, in particular to a lithium battery cooling device and a use method. The lithium battery cooling device comprises a cooling shell, the cooling shell comprises an air inlet cavity, an elastic air storage cavity and an air outlet cavity which are communicated, the air inlet cavity is provided with an air inlet, the air outlet cavity is provided with an air outlet, the air outlet cavity and the air inlet cavity are respectively arranged at two ends of the elastic air storage cavity, and the air inlet cavity, the elastic air storage cavity and the air outlet cavity form a containing space. The application provides a lithium battery cooling device and a use method, so as to solve the problem that the existing jet flow cooling system still has low system integration, thereby causing a complex structure.

A sample holder design and sample cooling device for single-particle cryo-electron microscopy simplifies sample preparation and handling, significantly reduces errors, improves result reproducibility, and significantly reduces the total cost. The system consists of a grid-based sample holder system, a grid handling tool, a grid blotting tool, an immersion cooling system, and a jet cooling system.

The present application relates to a low-cost iron-nickel-based heat-resistant alloy and a high-speed rolling method thereof, and belongs to the technical field of special alloy manufacturing. The present application solves the technical problems of cracking, short tool life, high energy consumption and low efficiency in subsequent solid solution treatment caused by uneven material temperature rise and cooling during high-speed rolling of the existing heat-resistant alloy. In the method of the present application, the heated heat-resistant alloy rolling stock is sequentially passed through the rough rolling, intermediate rolling and finishing rolling units. At least two cooling devices are arranged at the key positions in the later stage of the finishing rolling unit. The polyacrylamide aqueous solution containing specific particle size and proportion of aluminum oxide powder is used for intermittent jet cooling of the wire. The finished wire is directly put into the solid solution furnace for online solid solution treatment and water cooling. The present application realizes the integrated production of heat-resistant alloy wire from rolling to heat treatment with high efficiency, high quality and low energy consumption. The prepared wire has uniform structure and excellent performance, and is especially suitable for manufacturing engine valves.

The invention discloses an electric spindle structure with a directional heat conduction function and a design method of the electric spindle structure. A plurality of heat pipes are embedded in a front bearing area and a rear bearing area of an electric spindle shell to reduce axial heat transfer heat resistance, and a high-heat-conduction material component is arranged on a rotating shaft to enhance conduction of heat to bearings; and a jet cooling local heat sink structure is arranged at the end part of the rotating shaft so as to directly and quickly dissipate heat. The corresponding design method comprises the steps that a key area with limited heat flow transfer in the motorized spindle is identified through entropy production sensitivity analysis, heat conduction path optimization design is conducted on the area on the premise that the original structural form of the motorized spindle is not changed, and the local heat transfer capacity is enhanced by means of a heat pipe, a high-heat-conduction material, jet cooling and the like. Heat generated in the motorized spindle is efficiently guided to heat sink areas such as a machine shell cooling water jacket along a preset path, temperature field distribution in the motorized spindle is improved, the temperature gradient and the hot-spot temperature of the motorized spindle are reduced, thermal deformation is reduced, and the running precision and stability of the motorized spindle are improved.