15results about How to "Solving Ablation Problems" patented technology

The invention discloses a 3D printing integrated injector. An ignition channel penetrates through a head cavity A and a head cavity B and is located between the head cavity A and the head cavity B; the nozzles A and the nozzles B are of an integrated coaxial structure and are evenly distributed on the periphery of the ignition channel in the circumferential direction. Wherein the nozzle A comprises inlet holes and a straight channel, the inlet holes are located in the head cavity A, and at least four inlet holes are evenly distributed in the circumferential direction and communicate with the straight channel in the center; the nozzle B is located in the head cavity B and comprises a flow equalizing ring cavity, a contraction channel and an outlet ring seam; the overall appearance section of the flow equalizing ring cavity and the contraction channel is in a circular truncated cone shape, the front end of the contraction channel is an outlet circular seam formed between the side wall of the outlet end of the straight channel of the nozzle A and the bottom B, and a mixing area is formed between the outlet end of the straight channel of the nozzle A and the bottom B; an annular cavity is formed between the outer walls of the head cavity A and the head cavity B, namely the annular wall with the flow equalizing hole and the outer wall of the cavity, an inlet is formed in the outer wall of the cavity, and the ignition channel, the head cavity A, the head cavity B, the chamber pressure measuring channel, the nozzle A and the nozzle B are integrally printed and formed in a 3D mode.

The invention relates to an integrally welded thrust chamber structure, which is characterized in that the inner wall of a combustion chamber is welded with the inner wall of a spray pipe through electron beams, and the outer wall of the combustion chamber and the outer wall of the spray pipe are respectively welded with a connecting ring, so that the combustion chamber is welded with an extension section of the spray pipe; the flow equalizing effect is achieved through the middle annular cavity, the fuel collector is welded to the combustion chamber, and the fuel inlet flange serves as a fuel inlet and is welded to the fuel collector. A spray pipe inlet collector is omitted, the layout is compact, the structure is simple, and the overall weight of the thrust chamber is reduced.

The utility model provides a relay water cooling structure and battery cut-off unit relates to battery cut-off unit technical field, this relay water cooling structure includes liquid cooling board, conducting group and relay, conducting group sets up on liquid cooling board, and conducting group includes interval first conducting part and second conducting part, and first conducting part and second conducting part all are contacted with liquid cooling board and cooperate, and relay has power terminal group, and power terminal group includes first power terminal and second power terminal, and first power terminal contacts with first conducting part and cooperates, and second power terminal contacts with second conducting part and cooperates. When the relay generates excessive heat, can directly through liquid cooling board and carry out rapid cooling, will not exceed the long -term tolerance temperature of relay shell, prolongs the service life, effectively solved because of the burn -off or welding phenomenon that the temperature of the lap joint is too high, makes the main circuit virtual connection or circuit breaking, leads to the problem of the instantaneous power failure or the fire of the vehicle.

The present invention discloses a method, system, electronic device and medium for desulfurization of LNT, belonging to the technical field of engine exhaust treatment. After detecting that the LNT system enters the desulfurization mode, the method uses real-time collected environmental information and vehicle operating condition information and other data to determine the final post-injection amount value, and sends instructions to inject fuel according to this value to prompt the LNT to perform reduction desulfurization. Compared with the prior art, the desulfurization method provided by the present invention adjusts the amount of fuel injected in the desulfurization mode by collecting real-time environmental data, thereby avoiding the engine being affected by the environment, incomplete desulfurization or excessive temperature during desulfurization, causing LNT system ablation and other problems. The present invention aims at the problem of the influence of environmental factors on LNT desulfurization, and performs more precise calibration of the amount of fuel injected in the desulfurization mode, which is conducive to further exploring the potential of the LNT catalyst and expanding the scope of use of the LNT catalyst system.

The invention discloses a support plate stabilizer structure for enhancing fuel oil atomization and suitable for an afterburner, which is used for improving the fuel oil atomization effect and the combustion stability, and comprises two support plate outer edge frames, a support plate tail edge frame, a fuel oil injection rod and the like, and a support plate mixing channel is formed between the two support plate outer edge frames; and a plurality of cooling air cavities are formed in the main body part so as to prevent key parts from being ablated in a high-temperature environment. First fuel oil impacts the fan-shaped channels through the oil injection holes to form an oil film, is further atomized under the shearing action of airflow and is mixed with air, and premixed gas is formed and then enters the concave cavity to be combusted. According to the design, flames in the concave cavity can be kept stable under the extreme conditions of low temperature, low pressure and the like, so that the ignition and flameout boundary of the combustion chamber is widened, meanwhile, high-temperature fuel gas in the concave cavity can heat transverse jet flow of second fuel oil, and the evaporation and mixing efficiency of the second fuel oil is improved. By means of the integrated design, the number of components is reduced, the flow resistance in the non-stress-application state is reduced, and meanwhile the thrust-weight ratio is increased.

This invention relates to the field of carbon nanotube technology, and discloses a method and apparatus for preparing horizontally arrayed carbon nanotubes. A gaseous carbon source is used as the reactant, and transition metal vapor is used as the catalyst. The preparation is carried out using an electric arc discharge method. The electric arc is located between two energized electrodes in a reaction vessel, with the two electrodes positioned vertically opposite each other. The catalyst powder is magnetically attracted to the bottom of the upper electrode. When struck by the electric arc, the catalyst powder heats up, loses its magnetism, and falls, contacting the electric arc in the air and vaporizing. This not only ensures more thorough contact with the arc, generating more transition metal vapor, but also changes the vapor generation location from a single point on the electrode to the entire electric arc. The reaction location completely coincides with the transition metal vapor generation location, thus overcoming the problem of catalyst absence at some reaction sites. Simultaneously, the electric arc rotates in the magnetic field rather than being fixed at the same position on the electrode, and the contact area with the reactant is larger, overcoming electrode ablation problems and improving reaction efficiency.

The invention belongs to the field of aviation turbofan engine ionization flame detection, and particularly relates to a turbofan engine ionization flame detector. Comprising a junction box part, a through pipe, a sleeve, an insulating pipe, a connecting sleeve, an exploring pipe, a floating sleeve and a cover, and one end of the through pipe is arranged on a central electrode of the junction box part in a sleeving mode; the insulating tube and the sleeve sequentially sleeve the outer side of the connecting sleeve, and one end face of the sleeve and one end face of the connecting sleeve are fixed through welding; one end of the sleeve is inserted into the other end of the through pipe; one end of the probe tube is inserted into the other end of the connecting sleeve; the other end of the exploring tube is of a bullet-shaped structure and is provided with a plurality of air outlet through holes; the floating sleeve is sleeved on the outer side of the insulating tube, and the cover is sleeved on the floating sleeve; the cover is fixedly welded with the stabilizer; and the junction box component is screwed and connected with the stress application cylinder through threads.

The invention provides a staggered power cabin backflow blocking device and a design method thereof, and belongs to the technical field of helicopter aerodynamics and pneumatic design, the device comprises an engine main spray pipe, an exhaust spray pipe, an inner flow resistance plate and an outer flow resistance plate, and the inner flow resistance plate and the outer flow resistance plate are located in an injection gap formed by the engine main spray pipe and the exhaust spray pipe; one end of the inner spoiler is fixed to the outer side wall of the engine main spray pipe, one end of the outer spoiler is fixed to the inner side wall of the exhaust spray pipe, the outer spoiler is close to an exhaust outlet, the gap between the outer spoiler and the inner spoiler is 3-5 mm, and the outer spoiler and the inner spoiler have an overlapping area in the height direction. Through the staggered arrangement mode of the inner spoiler and the outer spoiler, the pressure at the ejection gap of the helicopter engine compartment is enhanced, the ablation problem caused by the fact that high-temperature tail gas exhausted by an engine flows back into the engine compartment is avoided, a main spray pipe or an exhaust spray pipe does not need to be directly replaced, the cost is reduced, and the production period is shortened.

The utility model discloses a fuse structure and a signal acquisition device of a power battery. The fuse structure comprises a base material layer and a fuse, the fuse is an etched circuit arranged on the base material layer, the fuse structure further comprises an arc extinguishing layer and an adhesive film layer, the arc extinguishing layer is stacked on the base material layer and covers the etched circuit, and the adhesive film layer is arranged on the base material layer. And the adhesive film layer is laminated on the part, which is not covered by the arc extinguishing layer, of the base material layer. The fuse structure can reduce the temperature rise when the etching fuse is overloaded, and ensures the safe fusing of the etching fuse at the same time.

The present invention discloses a flat hole array energy feeding structure for improving the microwave uniformity of a high-temperature furnace, comprising an energy feeding waveguide (1), an impedance matching structure (2), a large-size microwave energy feeding resonant cavity (3), a flat hole array structure (4), a microwave diffusion structure (5), a microwave action cavity (6), a high-temperature furnace structure (7), and a heated material (8). The present invention has a reasonable structural design, which allows microwave energy to be dispersed and evenly pass through a heat-insulating material, and can effectively improve the microwave field uniformity of the high-temperature furnace, solve the problem of heat-insulating material ablation, extend the service life of the heat-insulating material in the microwave field, improve the reliability of the long-term operation of the high-temperature furnace, and realize the industrial application of microwave high-temperature projects.

This invention discloses a forced lubrication and circulating cooling system and method for a gearbox. The system includes a gearbox body and a gear oil pump driven by a shift shaft within it. The oil pump draws oil from the bottom of the gearbox through an oil suction pipe and an oil suction filter, pressurizes it, and sends it to an oil cooler for cooling via a first return oil pipe, and then to the brake shaft via a second return oil pipe. The brake shaft has a main oil passage axially, a flow-limiting plug at one end, and radial branch oil passages circumferentially. A brake gear is fitted on the brake shaft, and its internal gear oil passages communicate with the radial branch oil passages, guiding the cooling oil into the brake friction pairs. Cross-shaped mesh oil grooves on the friction pad surface increase the heat exchange area. After lubrication and cooling, the oil flows back to the bottom of the gearbox, forming a closed loop. This system achieves forced lubrication and efficient heat dissipation, solving the problems of brake overheating and wear. It has a compact structure and low cost, and is particularly suitable for tracked agricultural machinery.

The invention discloses a liquid rocket engine thrust chamber injector panel and a preparation method thereof, and relates to the technical field of aerospace engine thrust chamber manufacturing. Comprising the following steps that raw materials are subjected to atmosphere protection induction melting, and a Cu-Cr-Zr-Nb alloy ingot blank is prepared; the cast ingot blank is forged for 60 min to 150 min at the temperature of 850 DEG C to 950 DEG C, the forging deformation per fire is controlled to be 30% to 50%, and a forged blank is obtained; after solution heat treatment is conducted on the forged blank, rough rolling is conducted at the temperature of 850-950 DEG C, and a rough rolling blank is obtained; after the rough rolling blank is annealed, intermediate rolling is conducted at the temperature of 850-950 DEG C, and a rolled blank is obtained; and after the rolled blank is cut into a circular blank of the injector panel, aging heat treatment is conducted, machining is conducted till the dimensional tolerance required by a product drawing is achieved, and the finished injector panel is obtained. The Cu-Cr-Zr-Nb material panel has high heat conductivity and high-temperature strength, and the problem of material ablation caused by poor heat conduction of an existing injector panel material is solved.

The utility model relates to a speed changer with a channel type gear spline pad lubricating structure, and solves the problem that in the prior art, when a channel type overgear of a speed changer is changed into helical teeth from straight teeth, the channel type overgear is in extrusion friction with a spline pad and is poor in lubrication, so that the spline pad is ablated due to overheating of a contact surface. On the basis that the overall structure of an existing transmission is not changed, the gear oil hole and the corresponding gear oil groove are formed in the overgear gear; a gear ring oil groove is formed in the synchronizer combination gear ring, and an oil cavity structure is formed through a gear channel. Spline pad oil grooves are formed in the left and right end surfaces of the left spline pad. According to the utility model, the original parts of the transmission are processed, and the oil path for lubricating the spline pad is added by utilizing the gear channel structure, so that the contact surface of the spline pad and the gear is fully lubricated, and the problem of ablation of the spline pad due to poor lubrication is simply and reliably solved.

The present invention discloses a CNC cutting machine workbench. It includes a plurality of longitudinally arranged main support bars and a cutting device for cutting the plates on the main support bars. The main support bars and the cutting device are fixedly installed through a connecting frame and can move synchronously. A positioning backer for positioning the plates is arranged above the main support bars. The positioning backer positions the plates between the cutting device and the main support bars to form a cutting station. When the cutting device cuts the plates positioned by the positioning backer, the main support bars can move synchronously with the cutting device in the X-axis and / or Y-axis direction. After adopting the above structure, the processing quality is greatly improved. During the processing, the problem of plate ablation caused by the cutting point falling on the saw teeth is avoided. The ball bearing support method also avoids scratches on the surface of the workpiece by the support point. In addition, the fixed cutting point makes the dust channel unique, so it also has an outstanding effect of convenient dust removal.

A modularized contact rail end elbow comprises a first elbow body, an insulation slide way and a second elbow body, the first elbow body is provided with a straight section and a first bending section, the second elbow body is provided with a second bending section and a third bending section, the insulation slide way is arranged between the first elbow body and the second elbow body and fixedly connected with the first bending section and the second bending section, and the insulation slide way is arranged between the first elbow body and the second elbow body. When the end elbow is on line and works, the first elbow body is electrified, the second elbow body is not electrified, the working faces of the first bending section, the insulating slide way and the second bending section are smoothly connected, the working faces of the first elbow body and the insulating slide way are smoothly connected through an end tab, and the end tab comprises a transition section and an arc striking section. The transition section is fixed on a concave platform at the end part of the first bending section; and the arc striking section is embedded in a groove at one end of the working surface of the insulating slideway. The current path of the transition slope section is physically cut off through the insulating slide way, and the insulating slide way is protected from being ablated by the run-on plate, so that the problem of ablation of the transition slope section is effectively solved.