70results about How to "Solving Ablation Problems" patented technology

The invention provides a universal rechargeable battery formed by adopting a lithium-ion battery and a control method thereof. The universal rechargeable battery comprises an external packing casing, as well as a charging / discharging controller, a positive electrode welding piece, the lithium-ion battery and a negative electrode end cover which are sequentially assembled in the external packing casing in a press fit manner, wherein the charging / discharging controller comprises a charging / discharging controller casing as well as a charging / discharging control circuit welding body and a charging / discharging controller support, which are arranged in the charging / discharging controller casing; a lithium-ion battery charging / discharging control circuit is welded on a charging / discharging control circuit welding body; the lithium-ion battery charging / discharging control circuit comprises a lithium-ion battery charging control circuit welded on a circuit board, electrically connected with the lithium-ion battery and the positive electrode end cover respectively and further electrically connected with the negative electrode end cover via the charging / discharging controller casing and the external packing casing, a lithium-ion battery detection and control circuit, and a DC-DC step-down voltage stabilizing discharging circuit.

A single sliding block rolling spray mode variable centroid aircraft model and a designing method for structural layout parameters thereof relate to the field of flight vehicle design, and aim to solve the problems of ablation to an aerodynamic rudder in a conventional hypersonic aircraft and complexity in sliding block layout inside a conventional variable centroid aircraft. The aircraft model provided by the invention comprises two fixed wings, a projectile body, a rolling spray engine and a movable body, wherein the two fixed wings are symmetrically arranged on the two sides of the projectile body; the tip of the cone-shaped body of the movable body is connected with the head of the projectile body through a movably connecting point O1; a guide rail is arranged at the tail end of the projectile body, the root part of the cone-shaped body of the movable body is connected with the O2 point of the guide rail at the tail part of the projectile body in a sliding manner; since the movable body is further expanded to serve as a main body, the mass of the movable body accounts for most part of the mass of the entire system, the projectile body is taken as a driven body, the purpose of maneuvering control can also achieved, the motion of the projectile body can be controlled through an actuator on the movable body; the integral aerodynamic configuration of the projectile body is ensured. The aircraft model provided by the invention is applicable to the field of flight vehicle design.

The invention provides a rare earth luminescent material preparation method containing crystal defect repair technology and a product thereof to overcome disadvantages in synthesis of garnet activated rare earth aluminate fluorescent materials in the prior art. The preparation method comprises the following four steps: preparation of clinker; preparation of clinker blended with a raw material; preparation of a fluorescent powder material having undergone secondary annealing; and preparation of the finished fluorescent material. The finished fluorescent material prepared by using the method has external quantum efficiency of 0.706 to 0.745 and internal quantum efficiency of 0.953 to 0.992 in a temperature range of room temperature to 150 DEG C. The invention has the following beneficial technical effects: the raw material is used to replace an activator during secondary reduction; and in virtue of cooperative action of surface modification and secondary reduction thermodynamics, crystal defects are eliminated, and internal quantum efficiency and photo-thermal stability of the Ce<3+> activated garnet structure rare earth aluminate luminescent material are improved.

The invention provides an objective table partition temperature control system for 3D printing. The objective table partition temperature control system comprises an upper computer, a control circuit and a partition-type objective table. After the upper computer reads user file information, working partitions can be automatically or manually distributed according to the size and position of an object needing to be printed in a file, temperature detection and control over the corresponding partition are started, and multi-partition distribution and temperature control can also be achieved under the situation that a plurality of components are printed at the same time. The control circuit can identify instructions of the upper computer, complete temperature detection and control over the partitions, and upload data to the upper computer. The partition-type objective table is composed of a plurality of temperature control units. Each temperature control unit comprises an independent temperature probe and a heater. Compared with an existing objective table temperature control system, the objective table partition temperature control system has the advantages that the corresponding temperature control partitions can be automatically or manually started according to the sizes and the positions of the printed components, the heating speed is high, energy consumption is low, safety is high, and precision of temperature control is high.

The invention discloses an electrical etching machine of a metal cutter template, which comprises a machine frame, an upper electrode, a lower electrode and an electrolyte collecting tank. A translation frame is further matched on the machine frame in moving mode, the upper electrode is installed and connected onto the translation frame, at least two liquid outlet devices communicated with a liquid supplying device are arranged on the translation frame and beside the upper electrode, a liquid outlet of each liquid outlet device faces toward the bottom of the upper electrode and toward a space under the bottom face of the upper electrode, an insulating workpiece support piece is arranged on the upper surface of the lower electrode and provided with a liquid passageway, or a plurality of insulating workpiece support strips are arranged on the upper surface of the lower electrode, the gaps between adjacent workpiece support strips form the liquid passageway, a liquid flow passage communicated with the upper surface of the lower electrode is arranged inside the lower electrode or on the lateral face of the lower electrode, and the liquid flow passage is communicated with the liquid passageway. The electrical etching machine generates no erosion and can meet the metal cutter template etching requirements for large etching depth, high evenness and high accuracy.

The invention provides a method for realizing carbon dioxide cycle power generation based on waste heat from a cement plant. According to the method, CO2 captured during emission reduction is used as a working medium and is cooled and compressed into liquid CO2, the low-pressure liquid CO2 fluid is conveyed into different CO2 energy storage devices through high-pressure pumping devices with the extremely-low energy consumption, various waste heat generated in the cement production process is used as the energy for energy storage of the low-pressure liquid CO2 fluid, and high-pressure thermal supercritical CO2 fluid with the fluctuations and / or different temperatures and different heat densities is generated and is tempered and changed into isothermal-isobaric supercritical CO2 fluid through a steady flow regulator to be stably supplied to a turbine / piston expander so that the turbine / piston expander can do work to drive an electric generator to generate electricity; and carbon dioxide cycle power generation is realized, efficient heat recycling can be achieved, the high heat efficiency is achieved, surplus energy is stored and used effectively, and flexible adjustment and utilization of the energy are achieved.

The invention discloses a surface breakdown type two-pair-rod electrode structural triggered vacuum switch. The triggered vacuum switch is of a three-section structure, comprising a corrugated ceramic housing at the upper section, another corrugated ceramic housing at the lower section, a metal shielding cover in the middle section, an upper electrode, a lower electrode, a triggering electrode, an upper electrode metal connecting rod, an upper electrode flange plate, a lower electrode metal connecting rod and a lower electrode flange plate; the upper electrode and the lower electrode are arranged in the metal shielding cover; the upper electrode flange plate is connected with the corrugated ceramic housing at the upper section; the lower electrode flange plate is connected with the corrugated ceramic housing at the lower section and forms a closed housing with the metal shielding layer; the upper electrode flange plate is connected to the corrugated ceramic housing at the upper section, and the lower electrode flange plate is connected to the corrugated ceramic housing at the lower section, so as to effectively increase the creepage distance between the upper electrode flange plate and the lower electrode flange plate. The triggered vacuum switch is high in working voltage, large in arcing area, high in transfer coulomb during conducting, long in service life under large current, uniform in electrode ablation degree, and high in power frequency withstand voltage after quenching of arc.

The invention provides a growth method of a high-quality and large-size silicon carbide (SiC) crystal. The growth method aims to improve the quality of the grown SiC crystal and eliminate a plane hexagonal cavity defect. The growth method comprises the following steps: a crucible loaded with a SiC raw material and a seed crystal is placed in a single-crystal growth furnace, the quick upward-pushing distance range of the crucible is 5-50 mm, the seed crystal gets away from a high temperature area, the crucible slowly descends after reaching certain temperature and pressure conditions, the descending distance is consistent with the upward-pushing distance of the crucible, then under the certain temperature and pressure conditions, the SiC raw material is sublimated and crystallized on the seed crystal, the crystal is cooled, and the SiC single crystal is obtained. The growth method has the advantages that in the initial stage of crystal growth, the seed crystal gets away from the high temperature area, seed crystal ablation caused by the high temperature is eliminated, and thus the plane hexagonal cavity defect is eliminated; and meanwhile full utilization of the SiC raw material isguaranteed, and the high-quality and large-size SiC crystal is obtained.

The invention provides a device system utilizing cement plant waste heat for achieving carbon dioxide cyclic power generation. The device comprises a liquid CO2 storage tank, a high-pressure pumping device, a CO2 energy storage device, a flow stabilizer, a turbine / piston expander, a power generator, a cooling device and a compression device. The CO2 energy storage device is used for making low-pressure liquid CO2 fluid pumped out of the liquid CO2 storage tank directly absorb abandoned waste heat or high-temperature heat energy which is different in temperature and is produced by a cement production line for energy storage, and the low-pressure liquid CO2 fluid is converted into supercritical CO2 fluid different in temperature, pressure and energy density. The flow stabilizer is used for converting the supercritical CO2 fluid different in temperature, pressure and energy density into equal-pressure supercritical CO2 fluid. According to the device system, captured carbon dioxide serves as a working medium, various kinds of abandoned waste heat which is generated in the cement production process and is large in temperature fluctuation and temperature difference is utilized as main energy to achieve carbon dioxide cyclic power generation, and energy consumption is low.

The invention provides a liquid metal Rankine cycle thermoelectric conversion device for a jet engine. The liquid metal Rankine cycle thermoelectric conversion device is capable of cooling turbines Iand the wall surface of a spray pipe of the jet engine; liquid metal is stored in a storage box of the liquid metal Rankine cycle thermoelectric conversion device, the outlet of the storage box communicates with the inlet of an electromagnetic pump, the outlet of the electromagnetic pump communicates with the inlets of internal cooling channels of the turbines I through a machine case, the outletsof the internal cooling channels of the turbines I communicate with the inlet of a cooling channel of the wall surface of the spray pipe, the outlet of the cooling channel of the wall surface of thespray pipe communicates with the inlet of a turbine II, the outlet of the turbine II communicates with the working medium inlet of a condenser, and the working medium outlet of the condenser communicates with the inlet of the storage box, so that a liquid metal flow path is formed; and the turbine II and a power generator rotate coaxially, so that the power generator is driven to generate electricity. Through the liquid metal Rankine cycle thermoelectric conversion device, the problem that in the prior art, a static blade of a turbine of a jet engine is subjected to ablation caused by the toohigh initial temperature of gas can be solved; the dual requirements of an aircraft for electric energy and cold energy can be met; and the upper limit of the performance of the jet engine can be improved.

The invention discloses a laser direct writing pre-forming photocatalysis plating preparing method for a material surface metal pattern, and belongs to the technical field of material surface treatment. The laser direct writing technology and the photocatalysis plating technology are combined, and on the basis of a laser direct writing etched pre-formed high-precision nano semiconductor film pattern, photocatalysis plating is conducted for preparing the high-quality metal pattern. The laser direct writing pre-forming photocatalysis plating preparing method for the material surface metal pattern is environment-friendly, short in process, capable of saving metal, efficient and low in cost and has universality and high stability; and the prepared metal pattern is high in size precision, goodin clad layer surface quality and excellent in performance, and the bonding strength between the prepared metal pattern and a base body is high.

The invention discloses an auxiliary device for precision argon arc welding of an elastic clamping ring and a welding method of the auxiliary device applied to welding beads with small size. The auxiliary device for the precision argon arc welding of the elastic clamping ring adopts a welding process design added with an arc striking plate and an arc stopping plate, used in combination with the welding fixture of a long-ring shaped gas lens type rectification mechanism as the auxiliary device. A set cushion block comprises a multiple layers of nickel nets arranged between an upper cushion block and a lower cushion block, and the lower cushion block is provided with a rectifying plate; the set rectification mechanism rectifies protective gas and converts the cluttered turbulent state of the protective gas into the relatively regular laminar state, so as to protect welded joints in the manner of stable laminar state, and simultaneously prevent connection parts between the arc striking plate and weldment and between the arc stopping plate and weldment and avoid the welding beads being polluted by external impurities.

The invention relates to an axial plunger pump for increasing flow and sealing pressure, belonging to the hydraulic pressure industry of general machinery field. Compared with the traditional pump which has one set of booster system, the axial plunger pump has two sets of booster system, wherein the highest points of two inclined discs ( part 1 and part 2 shown in the chart) differ 180 DEG so that the two sets of plungers (part 4 and part 5 shown in the chart) boost in pair to balance moment acting on a valve plate (part 8 shown in the chart) to uniform the sealing pressure in the front and at the back of the valve plate so as to seal higher pressure; a cylinder sleeve (part 6 shown in the chart) made of Si3N4 is added in the fit clearance of the plungers and a cylinder body (part 7 shown in the chart) to improve clearance sealing and cylinder body strength; and by the measures of the invention, the maximum flow and the pressure of the pump are greatly increased. High-pressure and large-flow pumps are used for large-sized oil-pressure or hydraulic-pressure machinery to greatly reduce the volume of main engine thereof, and thus, the manufacture difficulty is reduced, the volume and the quantity of the matched axial plunger pump is reduced, a large-sized oil press can be manufactured, and project cost and construction cost are greatly saved.

The invention discloses a tangential inclined ring film divergent cooling structure which comprises a flame tube wall surface, a plurality of air film sheets and a plurality of air inlet hoppers, the flame tube wall surface is provided with a plurality of air film holes allowing cooling air to enter a flame tube, and the inner side of the flame tube wall surface is provided with the plurality of air film sheets allowing the cooling air to flow along the flame tube wall surface in the tangential direction. A plurality of air inlet hoppers are arranged on the wall face of the flame tube and located on one side of the air film sheets. The invention belongs to the technical field of combustion chamber cooling, the air film sheets are arranged on the wall face of the flame tube, cooling air films are arranged in the tangential direction of the flame tube, the tangential annular air films are connected end to end to cover the whole wall face of the flame tube, and particularly when a large hole is of a bucket structure, the problem that the wall face is difficult to cool can be well solved. A powerful cooling air film is formed at the downstream of large holes (main combustion holes and mixing holes), so that the reasonability of the wall surface temperature is ensured. The cooling air films move in the tangential direction of the flame tube, and the cooling covering time is prolonged.

The invention discloses a double-revolving-chamber caseless ammunition gun, comprising a gun barrel, a gunlock, a percussion lock, a counter-recoil lock, a firing lock and a bullet pushing lock. The gun is characterized in that a horizontal-axis-type revolving chamber body with two parallel chambers is arranged at the rear of the gun barrel; the gunlock and the counter-recoil lock are arranged successively behind the revolving chamber body; the bullet pushing lock is arranged behind bullets to be pushed. The counter-recoil lock drives the two chambers of the revolving chamber body to align to the gun barrel and the bullets to be pushed alternately and drives the bullet pushing lock to push the bullets; the gun lock is used for locking and unlocking the chambers; the percussion lock is used for performing percussion; and the firing lock is used for controlling safety as well as the single shot and continuous shot of the bullets. By adopting the scheme of the invention, the two chambers can fire alternately and the chamber body can be changed rapidly, which can thoroughly eliminate the problems of high-temperature ablation of chambers of caseless ammunition guns and the like. The double-revolving-chamber caseless ammunition gun is simple in structure and processing, small in size, weight and vibration, and can improve precision, firing rate and reliability.

The invention provides a combined thermal insulation bolt connection structure. The combined thermal insulation bolt connection structure comprises a piston steel crown, a metal thermal insulation pad, elastic combined gaskets, bolts and an aluminum body; the metal thermal insulation pad is arranged between the piston steel crown and the contact surface of the aluminum body, the piston steel crown is provided with bolt holes for bolt fastening, the metal thermal insulation pad and the aluminum body are provided with through holes used for allowing the bolts to penetrate through, the piston steel crown, the metal thermal insulation pad and the aluminum body are fastened together through multiple bolts, and the elastic combined gaskets are arranged between the heads of the bolts and the aluminum body. The combined thermal insulation bolt connection structure has the following advantages that the metal thermal insulation pad is arranged between the piston steel crown and the aluminum body, therefore, heat is partially isolated through the thermal insulation pad, and the temperature of the aluminum body is controlled within the reasonable range; the elastic combined gaskets are adopted between the bolts and the contact surface of the aluminum body, therefore, part of deformation can be compensated when the piston is heated to be expanded or cooled, and the tensile loads of the bolts are reduced; the contact stress of the aluminum body bearing surface can be reduced, and then aluminum body cracking is prevented.

The invention discloses an auxiliary electric box, which comprises a first end cover, a second end cover and a box body; the box body comprises a side plate and a bracket plate; a plurality of side plates are sequentially connected end to end, the bracket plate is arranged in a space enclosed by the plurality of side plates, and the inner walls of the plurality of side plates are fixedly connectedwith the bracket plate; the bracket plate is provided with a mounting part, a first connecting column and a second connecting column; the mounting part, the first connecting column and the second connecting column are sequentially arranged in parallel, and the first connecting column is positioned between the mounting part and the second connecting column; the mounting part is configured to be provided with a relay; the first connecting column is electrically connected with the relay; the first connecting column and the second connecting column are arranged to be electrically connected with two ends of a fuse respectively; the first end cover and the second end cover are both connected with the box body, and the first end cover and the second end cover are respectively positioned at two sides of the bracket plate. The electric box has an advantage of preventing ablation of the electric box.

The invention discloses a height switch for an aircraft wastewater system. The height switch comprises a bouncing diaphragm; the sensor combination comprises a pressure cavity which is arranged in a sealed mode, an isolation diaphragm is arranged in the pressure cavity, and the isolation diaphragm is freely connected with a bouncing diaphragm through a cover plate; the isolation diaphragm is used for converting the pressure changing along with the height into concentrated force and transmitting the concentrated force to the bouncing diaphragm, and the bouncing diaphragm bounces to drive the center rod to move. And one end of the switch seat combination is in signal connection with the socket, and the other end is in threaded connection with the sensor combination. In the using process, the pressure cavity senses pressure, the isolation diaphragm in the pressure cavity senses different pressure values along with different heights, the pressure values are transmitted to the bouncing diaphragm, then the center rod is driven to move, a height signal is converted into a displacement signal, then the signal is transmitted to the socket, and the socket is connected with the socket. And the displacement signal is converted into a switching value electric signal and is transmitted to an external system.

The invention relates to a multi-angle spraying water coal slurry gasification device which comprises a water coal slurry preparation mechanism, a gasification mechanism and a washing mechanism. The gasification mechanism comprises a gasification furnace composed of a gasification chamber and and a shock chilling chamber. A main burner is arranged at the top of the gasification chamber in the axial direction. A plurality of auxiliary burners are arranged on the middle upper portion of the gasification chamber along the circumference in an even symmetrical mode. The bottom of the gasification chamber is provided with a tapered outlet extending into the shock chamber. A coal gas outlet is formed in the upper portion of the shock chilling chamber. Shock chilling water with certain liquid level is stored in the lower portion of the shock chilling chamber. A shock chilling ring and a descending tube are sequentially arranged on the lower portion of the tapered outlet of the gasification chamber. A plurality of water outlet holes with certain inclined angles are evenly formed in the inner annular wall of the shock chilling ring along the circumference direction. The outlet end of the descending tube extends below the liquid face of the shock chilling chamber. The washing mechanism comprises a washing tower communicated with the coal gas outlet through a washing device. A water outlet of the washing tower is respectively communicated with the washing device and the shock chilling ring through a shock chilling pump. The multi-angle spraying water coal slurry gasification device can solve the problems that slurry concentration is low, crown bricks are eroded, and coal slurry atomization effect is not good.

The embodiment of the invention discloses an electric fuel pump control method and device, electronic equipment and a storage medium, and belongs to the technical field of vehicle control. The electric fuel pump control method comprises the steps that if a power-on event is monitored, a value of a starting parameter of oil pumping control logic is obtained; and according to the value of the starting parameter, whether an electric fuel pump is controlled to work through the oil pumping control logic or not is determined. According to the technical scheme, the phenomenon that oil pumping is started in the power-on process before fuel oil is injected into a factory production line is effectively avoided, the problem of oil pump ablation caused by the phenomenon is avoided, the service life of the electric fuel oil pump is prolonged, and meanwhile, a new thought is provided for the control method of the electric fuel oil pump.

The invention discloses a partial oxidation process burner and application thereof. The burner mainly comprises a gasifying agent channel, an auxiliary gasifying agent channel, a fuel channel and a protecting fuel channel which are sequentially arranged from inside to outside. The partial oxidation process burner is applied to a gaseous hydrocarbon converting furnace and is capable of protecting the end surface of a nozzle from being flushed and etched by high-temperature synthesis gas, flame of the burner is low in temperature and uniformly distributed, and high-temperature flame is far from the end surface of the burner, so that temperature of the end surface of the nozzle is remarkably decreased, the burner can be protected without cooling water, and meanwhile, the temperature of a burner flange is low. The partial oxidation process burner has the advantages of being simple in structure, long in service life, wide in application range and the like and has very wide application prospect.

The invention provides an integrated force-bearing and flow-equalizing top cover device, which comprises a butt flange, an inlet section, a top cover, a force-bearing device, a rectifying device and supporting ribs; a port of the butt flange is a propellant inlet, the butt flange is connected with the top cover through an inlet section, the radial supporting ribs are arranged around the inlet section, and the supporting ribs are connected with the butt flange, the inlet section and the top cover respectively; the upper end of the top cover is connected with the force-bearing device for transmitting thrust; the lower end of the top cover is connected with the rectifying device for ensuring uniform distribution of propellants entering nozzles; the cross section of the top cover passing through the axis is in a double-peak shape, and a center concave cavity is a circular-truncated-cone-shaped platform with a center hole and used for connection and installation of an igniter; the top cover is provided with a radial window for operating and installing the igniter or leading out an igniter cable; and the top cover is also provided with a hoisting hole for hoisting. The integrated force-bearing and flow-equalizing top cover device provided by the invention can bear internal pressure, can transmit thrust, is high in pressure and flow distribution uniformity, and is integrally formed without welding.

The invention provides a high-current toggle switch with an electromagnetic shielding characteristic. The high-current toggle switch comprises a handle, a shifting fork assembly, a movable contact piece assembly, a fixed contact piece assembly and a shielding cover. The shifting fork assembly, the movable contact piece assembly and the fixed contact piece assembly are installed in the shielding case to form a switch, and the handle penetrates through the top wall of the shielding case to be installed on the shifting fork assembly to form an action mechanism. According to the invention, the conductive part of the switch is wrapped by the shielding cover, so that the influence of external electromagnetic interference on the switch is effectively solved, and electromagnetic signals in the switch are prevented from diffusing outwards, thereby realizing an electromagnetic shielding function. Meanwhile, due to lead-out of the connecting wires, the ablation problem of the conductive pins is avoided, so that the environmental adaptability of the electromechanical element is effectively and greatly improved, and the equipment reliability is improved.

The invention provides equipment for preparing high-concentration gasified coal slurry. The equipment comprises a fixed base, a remote electronic control identification device, a data transmission line, a mobile base device and the like, wherein the fixed base is arranged at the bottom of the remote electronic control identification device; a grinding device, a coal slurry pump, a gasifying device, a protection shell, a waste heat recovery device and a washing device are all arranged on the mobile base device; a power device is arranged at the bottom of the mobile base device; a control chip is arranged inside the mobile base device; and the grinding device is connected with the gasifying device. Due to the remote electronic control identification device, the grinding device, the coal slurry pump, the gasifying device and the waste heat recovery device, the equipment is convenient to use, easy to operate, safe and reliable; and moreover, the working efficiency is improved, thus the functional diversity is perfected, the manufacturing cost is reduced, and the best practical effect is realized.

The invention provides a double-component nozzle liquid flow performance testing device, and solves the problem that an existing double-component nozzle cannot measure flow under double-path given pressure drop at the same time. The device comprises an upper testing shell, a lower testing shell, a first pressure measuring nozzle and a second pressure measuring nozzle, the upper testing shell comprises a water inlet nozzle, an upper cover plate and an upper barrel which are sequentially arranged from top to bottom; the lower testing shell comprises an annular bottom plate, a middle sleeve, a lower bottom plate and a water inlet filler neck; the annular bottom plate is arranged at the upper end of the middle sleeve, and the lower bottom plate is arranged at the lower end of the middle sleeve; the water inlet filler neck is arranged on the outer wall of the middle sleeve; a bottom plate of the upper barrel is located in the middle sleeve, and the annular bottom plate is fixedly connectedwith the upper cover plate; the upper nozzle penetrates through a mounting hole of the upper barrel, the upper end of the upper nozzle is positioned in the upper cylinder, and the lower end is arranged in the middle sleeve; the upper end of the lower nozzle is arranged in the middle sleeve, and the lower end is arranged on the lower bottom plate; the first pressure measuring nozzle is arranged onthe upper cylinder body; and the second pressure measuring nozzle is arranged on the middle sleeve.

The invention discloses a tangentially inclined annular film divergent cooling structure, which comprises a flame tube wall surface, a gas membrane sheet and an air intake hopper. The wall surface of the flame tube is provided with a number of gas film holes for allowing cooling air to enter the flame tube. Several gas diaphragms are arranged on the inner side of the cylinder wall to make the cooling air flow tangentially along the wall of the flame cylinder, and several air inlet hoppers are arranged on the wall surface of the flame cylinder, and the air inlet hoppers are located on one side of the gas diaphragm. The invention belongs to the technical field of combustion chamber cooling. A gas film is arranged on the wall surface of the flame tube, and the cooling gas film is arranged in the tangential direction of the flame tube. When the hole is a bucket structure, the problem that the wall surface is difficult to cool can be well solved; a strong cooling gas film is formed downstream of the large hole (main combustion hole, mixing hole) to ensure the rationality of the wall temperature; the cooling gas film along the The flame barrel moves tangentially, extending its cooling coverage time.

The invention provides a piston with a low heat dissipation combined structure, which includes a piston steel top, a heat insulation pad, an independent ring seat, a positioning ring, an aluminum body, a bush, a bolt, a gasket set and a lock nut; the piston steel top, The heat insulation pad and the aluminum body are connected in turn by bolts; the first ring seat of the piston adopts an independent ring seat structure, which is installed on the top of the aluminum body and pressed by the piston steel top and the heat insulation pad; the concave structure in the middle of the piston steel top An air-tight heat-insulation cavity is formed between the aluminum body and the outer extension of the concave structure of the steel top of the piston. The invention effectively isolates the heat transfer from the top of the piston to the aluminum body, and performs heat insulation in three forms: air heat insulation, low heat dissipation metal pad physical heat insulation and combined structure contact thermal resistance, so that the temperature of the aluminum body is controlled within a reasonable range, and its mechanical properties are improved. No substantial degradation occurs.

The invention relates to a starter relay for heavy vehicles. It includes a housing, an armature, a reed, an L-shaped yoke, a coil in the housing, an iron core, a moving contact and a static contact; the improvement lies in: on the housing outside the same side of the moving contact and the static contact A strip-shaped electrical iron is provided, and magnetic steel slots are respectively arranged on the shells on both sides of the electrical iron, and permanent magnets are arranged in the corresponding magnetic steel slots on both sides, and the bottom of the permanent magnet is located on the top surface of the electrical iron. The magnetic force of the permanent magnet is used to elongate the arc and reduce the temperature generated by the arc, so that the arc is self-extinguished to achieve the purpose of arc suppression and solve the problem of ablation of the contacts of the heavy-duty vehicle starter relay caused by the arc. The reliability of the starting relay is greatly improved, and the potential safety hazard of the starter fire caused by the contact ablation of the starting relay is eliminated.