22results about How to "Avoid ablation" patented technology

The invention discloses an electric arc dynamic suppression method for hot plugging of an electric meter connector, relates to the technical field of electric energy metering equipment, and aims to solve the problems of electric arc generation, overproof metering error and the like caused by passive protection and lack of dynamic cooperative control in the prior art. The core of the method is that gap distance and power grid voltage phase signals are acquired in real time through a microcontroller, and the plugging speed, the signal injection and the position fine adjustment are dynamically regulated and controlled in three stages of pre-contact, low-current transition and full connection; and a machine learning model is combined to optimize a parameter threshold value, a redundancy safety mechanism and a multi-phase electric meter cooperative control strategy, so that double management and control of arc peak energy and metering errors are realized. The method can actively inhibit arc generation, avoid connector ablation and insulation deterioration, guarantee metering continuity and accuracy, adapt to complex power grid and environment working conditions, and meet the precision requirement of the intelligent electric meter.

The invention discloses a silicon controlled rectifier forward and reverse bidirectional switching solid-state module, and aims to solve the problems that an existing silicon controlled rectifier switching scheme is high in short circuit risk, high in cost and complexity and difficult to maintain, and a simple relay replacement scheme is short in service life. According to the technical scheme, the device comprises a hardware circuit structure and a single-chip microcomputer control logic part, the hardware circuit structure comprises a main loop silicon controlled rectifier unit, a relay switching unit, a single-chip microcomputer control unit, a signal acquisition unit and a power supply unit, and a mixed topological structure of three main loop silicon controlled rectifiers and a common double-pole double-throw relay is adopted. And in cooperation with closed-loop control logic of load state judgment, silicon controlled rectifier turn-off, relay switching and silicon controlled rectifier conduction, current forward and reverse safe switching is realized. Two silicon controlled rectifiers for switching are omitted, so that the risk of short circuit is thoroughly avoided; the relay is switched only when the silicon controlled rectifier has no output, so that the service life is prolonged; the circuit structure is simplified, the hardware and maintenance cost is reduced, and the anti-interference capability is remarkably improved.

The application relates to a partition-injection air-bleed circulation combustion chamber and a liquid rocket engine, wherein the partition-injection air-bleed circulation combustion chamber comprises a combustion chamber body and a partition-injection injector; the combustion chamber body is provided with an oxygen inlet collector, a fuel inlet collector and an air-bleed collector; the partition-injection injector is installed on the upper end of the combustion chamber body and is provided with injection holes; the oxygen inlet collector and the fuel inlet collector are communicated with the partition-injection injector and inject oxidants and fuels into the combustion chamber body through the partition-injection injector; the air-bleed collector is installed on the outer side of the middle part of the combustion chamber body and is communicated with the combustion chamber body; the partition-injection injector is disc-shaped and is divided into an equivalence zone, an oxygen-rich zone and a fuel-rich zone from the center to the outside; a partition ring is fixed to the lower surface of the partition-injection injector; the partition ring is in the form of a ring cylinder structure; the partition ring is located between the oxygen-rich zone and the fuel-rich zone and is used for separating the oxygen-rich zone and the fuel-rich zone.

The invention relates to the technical field of arc extinguishing devices, in particular to an arc extinguishing chamber and a circuit breaker. The arc extinguish chamber comprises a static contact seat and a moving contact seat which are arranged at an interval, the static contact seat and the moving contact seat are fixedly connected through an insulating supporting seat, a moving arc contact and a nozzle are arranged in the moving contact seat, the static contact seat is cylindrical, one end of the static contact seat far away from the moving contact seat is provided with a support, the center of the support is provided with a static arc contact seat, and the static arc contact seat is connected with the nozzle. A static arc contact is arranged in the static arc contact base, and a gas blocking cover is arranged on the side, facing the nozzle, of the support and used for blocking high-temperature ionization gas sprayed out of the nozzle. According to the invention, the gas blocking cover is arranged to effectively prevent high-temperature ionized gas from ablating the bracket at the bottom of the static contact seat.

This invention relates to the field of aero-engine technology, disclosing a combustion assembly and an aero-engine. The invention includes: a flame tube; an evaporator tube comprising a main pipe and several branch pipes, one end of the main pipe forming an evaporator tube inlet, the branch pipes corresponding to the other end of the main pipe, and the ends of the branch pipes away from the main pipe forming several evaporator tube outlets, which are located within the flame tube; and a fuel supply structure connected to the evaporator tube inlet. This invention, by arranging the branched evaporator tubes in a blood vessel-like pattern on the flame tube, increases the probability of fuel breaking up upon impact with the wall under the action of the branched structure, resulting in better fuel atomization. Simultaneously, because the branched evaporator tubes have a larger contact area with the hot wall surface, they absorb more heat, thus allowing the fuel to be heated more fully, thereby evaporating more fuel and ultimately improving combustion efficiency.

The utility model relates to a cooling device in a biomass carbonization furnace, which comprises two distributive pipes, water pipes are arranged at the tail ends of the distributive pipes, a plurality of pipe bodies are arranged between the two distributive pipes, heat dissipation assemblies are arranged on the inner sides of the pipe bodies, the two ends of the pipe bodies are respectively in threaded connection with mounting nozzles, and the tail ends of the mounting nozzles are fixedly connected with second connecting pipes. A plurality of first connecting pipes are symmetrically installed at the close ends of the two water distribution pipes, connecting sleeves are connected between the first connecting pipes and the second connecting pipes in a threaded mode, the heat dissipation assembly comprises three heat dissipation fin plates with the head ends fixedly connected, the included angle between every two adjacent heat dissipation fin plates is 120 degrees, the tail ends of the heat dissipation fin plates are fixedly connected with arc-shaped pieces, and the arc-shaped pieces are fixedly connected with the heat dissipation fin plates. Mounting strips are fixedly connected to the outer sides of the arc-shaped pieces, mounting grooves are formed in the inner side of the pipe body, and the mounting strips are mounted in the mounting grooves. The fire grate has the effect of cooling the fire grate, material fatigue or ablation caused by overheating is avoided, and the fire grate can be conveniently disassembled, replaced and descaled.

The invention relates to a magnesium-based hydrogen storage material and a preparation method thereof, and belongs to the technical field of hydrogen storage alloy materials and preparation thereof. The hydrogen storage material is an Mg-5Ni alloy with Sm powder uniformly distributed on the surface layer and an amorphous / nanocrystalline structure in the interior. The Sm powder is wrapped by the surface layer of the Mg-5Ni alloy to form composite powder of a core-shell structure; the hydrogen storage material is prepared from Mg-5Ni alloy powder and Sm powder as raw materials, and the raw materials are mixed and then subjected to dry ball milling. The hydrogen absorption and desorption kinetics of the existing magnesium-based hydrogen storage material can be effectively improved, the hydrogen desorption activation energy of the magnesium-based hydrogen storage material is reduced, and the problem that a solid additive is difficult to uniformly distribute on the surface is solved.

The application discloses a relay, which comprises a pair of static contacts, a pair of conductive parts and a moving contact. The pair of static contacts are arranged along a first direction. The conductive parts have conductive sections, the conductive sections of the pair of conductive parts are respectively connected to the pair of static contacts, and the conductive sections extend away from each other along the first direction, and the ends of the conductive sections away from the static contacts are static contact points. The moving contact is used to contact or separate the static contact points of the conductive sections of the pair of conductive parts, and the respective orthographic projections of the moving contact and the conductive sections on a target plane overlap. The target plane is perpendicular to the moving direction of the moving contact.

The utility model discloses a kind of double-pole spark plug ignition electrode needle, belong to ignition spark plug technical field, including spark plug metal shell, the side of spark plug metal shell is provided with center electrode unit and two side electrode units, the other side of spark plug metal shell has threaded connection part, the center electrode unit is located at the center position of the side of spark plug metal shell, and center electrode unit and spark plug metal shell coaxial heart layout, the center electrode unit includes the center electrode rod installed in the side of spark plug metal shell and the heat conduction core in the inner wall of center electrode rod;By setting side electrode unit in symmetry relative to center electrode unit, the ignition of more uniform can be realized in the mode of double-pole symmetry arrangement, to further can guarantee that ignition energy is more concentrated in ignition gap, effectively improve ignition success rate, avoid the energy consumption brought by multiple ignition.

This invention provides a method, system, and commercial vehicle for real-time calculation of clutch temperature in commercial vehicles, relating to the field of intelligent commercial vehicle clutches. After the vehicle is powered on, the chassis controller obtains the last shutdown time t0 and the current power-on time t1; it then determines whether the time interval (t1-t0) is greater than a preset time interval t. s If it is greater than t, the chassis controller obtains the initial clutch temperature t. f0 ; Calculate the slippage work of the clutch during starting or shifting; Calculate the temperature rise T caused by clutch slippage. a It can monitor the clutch temperature and the ambient temperature inside the chamber in real time after each power-on, and can be used for a clutch alarm system with real-time feedback, which is more intuitive and timely than clutch wear alarm methods.

The application relates to a direct-current relay. The direct-current relay comprises a moving spring sheet and an arc striking assembly; the arc striking assembly is arranged on the outer circumferential side of the moving spring sheet and comprises at least one arc striking magnet; wherein the surface of the arc striking magnet facing the moving spring sheet is a curved convex surface. The arc striking assembly can be applied to a scene in which the peripheral magnetic field of the moving spring sheet needs to be increased, can controllably adjust the arc striking strength and effect according to actual application needs, can avoid contact ablation, insulation deterioration, thermal runaway and system-level failure, and can effectively guarantee the safety and reliability of equipment.

This invention relates to a plasma generator based on a dense microporous material catalysis, belonging to the field of low-temperature plasma technology. The plasma generator contains at least one discharge unit, which includes a first electrode, a microporous ceramic medium, and a second electrode. The first electrode is used to connect to a power source, and the second electrode is used for grounding. The microporous ceramic medium is used to adsorb gas molecules and active particles generated by the plasma discharge. This invention generates micro-discharge in a dense microporous medium, which has an extremely high specific surface area. When gas passes through, it is adsorbed onto the surface of the micropores in the medium. Similarly, active substances in the plasma are adsorbed onto the surface of the micropores in the medium. This improves the contact efficiency between short-lived, highly active particles and free radicals in the plasma and the reactants, promotes surface catalytic reactions, and improves the overall efficiency of the device.

The utility model relates to battery technology field provides an output pole base and output pole subassembly, the output pole base includes: bottom plate, liquid inlet pipe and liquid outlet pipe, the bottom plate is equipped with connecting hole, the connecting hole is used for connecting output pole busbar and switching copper row, is equipped with the flow channel in the bottom plate, the flow channel is adjacent the connecting hole setting, the liquid inlet pipe with first end intercommunication of flow channel, the liquid outlet pipe with second end intercommunication of flow channel, the output pole base, through setting flow channel in the bottom plate, flow channel and liquid inlet pipe and liquid outlet pipe connection, can play the cooling function to the contact area of output pole busbar and bottom plate, avoided the conductor ablation of contact area, improved the reliability and service life of system.

The utility model discloses a contactor and a circuit system, and the contactor comprises a housing which is internally provided with an arc extinguishing cavity. The two static contact pieces are oppositely arranged, each static contact piece comprises a static piece contact part and a connecting part, the static piece contact parts are arranged in the arc extinguishing cavity, and the connecting parts are arranged outside the shell and used for being connected with external equipment; the movable contact piece is arranged in the arc extinguishing cavity, movable piece contact parts are arranged at the two ends of the movable contact piece, and the movable piece contact parts are in separable contact with the static piece contact parts of the two static contact pieces so as to disconnect or connect the two static contact pieces; the arc chute is formed by stacking a plurality of grid pieces, the arc chute surrounds the static piece contact part and the movable contact piece, and the top grid piece of the arc chute is connected with the static piece contact part in an equipotential manner; and the arc striking mechanism is used for generating a guide magnetic field, and the guide magnetic field is used for deflecting an arc generated when the moving part contact part is separated from the static part contact part to the arc chute for extinguishing. According to the utility model, the problem of low arc extinguishing efficiency of the arc extinguishing structure of the contactor in the prior art is solved.

The invention discloses an optical fiber balloon catheter, and relates to the technical field of medical instruments. Comprising a catheter, a balloon arranged at the tail end of the catheter, an optical fiber penetrating through the catheter and extending into the balloon, a dodging pipe fitting and a sleeve. The light uniformizing pipe fitting axially extends along the interior of the balloon, is provided with a near end and a far end which are opposite to each other, and is used for scattering light emitted by the optical fiber to realize uniform illumination; the sleeve is connected to the near end of the dodging pipe fitting and sleeved outside the optical fiber, and comprises a central positioning part formed on the through hole of the sleeve; the centering positioning part is used for positioning the optical fiber penetrating through the centering positioning part on the central axis of the dodging pipe fitting; wherein the optical fiber is inserted into the near end of the dodging pipe fitting on the central axis of the dodging pipe fitting after penetrating through the central positioning part of the sleeve, and an optical fiber section located in the dodging pipe fitting is provided with a light emitting part. The optical fiber can be centered and positioned in the dodging pipe fitting, and local overheating of the dodging pipe is prevented.

The utility model relates to a relay and an electric meter. The relay comprises a contact system, wherein the contact system comprises a movable contact unit and a static contact unit; a pushing system; the connecting structure is connected with the pushing system and the moving contact unit, and the connecting position of the connecting structure and the pushing system is located on the side, away from the static contact unit, of the moving contact unit. According to the application, the pushing system is connected with the moving contact unit through the connecting structure, and the connecting position of the connecting structure and the pushing system is located on the side, away from the static contact unit, of the moving contact unit, so that when the moving contact and the static contact are closed to generate an arc, the moving contact unit can block the arc to prevent ablation of the pushing system; and the overall reliability and service life of the relay are effectively improved.

The utility model discloses a preparation device of an ultrasonic microbubble contrast agent for judging the position of a deep venous catheter, which is used for preparing the microbubble contrast agent and comprises a foam maker, an injector and a connector, and the injector is connected with the foam maker through the connector; the foam maker comprises a stirring bin, a driver and stirring fan blades, the stirring bin is connected with the injector through a connector, the stirring fan blades are arranged in the stirring bin, and the driver is arranged outside the stirring bin and connected with the stirring fan blades. According to the utility model, the foam maker is used for automatically foaming, so that rapid, stable and uniform foaming is realized, the consistency of the effect of a microbubble contrast agent is ensured, the foaming efficiency is higher, the quality is more stable, and the imaging effect of the contrast agent is ensured; after foaming is conducted through the foam maker, injection of the microbubble contrast agent can be directly conducted, operation is simplified, consumed time is shortened, microbubble ablation is avoided, and the quality of injection operation of the microbubble contrast agent is effectively guaranteed.

The invention discloses a hybrid direct-current magnetic field circuit breaker topology circuit based on capacitor commutation. The hybrid direct-current magnetic field circuit breaker topology circuit comprises a power valve side wire outlet end and a load side wire outlet end, the main through-flow branch, the follow current branch and the transfer branch are connected in parallel between the power supply valve side wire outlet end and the load side wire outlet end; the energy absorption branch is connected with the transfer branch; the main through-current branch is used for undertaking a current conduction task under a normal working condition; the freewheeling branch is used for providing a freewheeling path for the current and ensuring the smooth transition of the current at a specified stage; the transfer branch is used for injecting reverse commutation current when the system has a short-circuit fault, so that the current of the main through-flow branch crosses a zero point; and the energy absorption branch is used for absorbing energy stored in the power system after the short-circuit fault is cut off, suppressing overvoltage and protecting the semiconductor switch. Equipment operation energy consumption is greatly reduced, the burden of a heat dissipation system is relieved, the equipment size is reduced, and the manufacturing cost is reduced.

The application discloses a mixing hopper which is arranged on the wall of a flame tube, and comprises an inner cone part, an outer ring part arranged outside the inner cone part, and a hopper cap used for connecting the wall of the flame tube. The inner cone part and the hopper cap enclose a mixing cavity used for mixing high-temperature gas and cooling gas flow. The inner cone part and the outer ring part enclose a cooling gap used for the flow of the cooling gas flow. Cooling holes are arranged on the inner cone part and are respectively communicated with the mixing cavity and the cooling gap, and are used for introducing the cooling gas flow into the cooling gap to impact cool the outer ring part and form a cooling gas film on the inner cone part. The outer ring part actively uses a small amount of cooling gas flow in cooperation with the cooling holes to effectively reduce the wall temperature of the mixing hopper and prevent the mixing hopper from ablation. Meanwhile, the outer ring part can also shield part of the wall of the inner cone part to prevent the inner cone part from ablation as much as possible, and the cooling effect is good, the service life of the mixing hopper is prolonged, and the mixing hopper can be used in the flame tube for a long time. In addition, the application further discloses a combustion chamber. In addition, the application further discloses an aero-engine.

The utility model discloses a relay. The relay comprises a contact cavity, at least one group of contact assemblies and an arc guide structure, the contact cavity is provided with a contact chamber; the contact assembly comprises a movable contact piece and two static contact pieces, the static contact pieces are provided with static parts and conductive pieces, the static parts are arranged at the top of the contact cavity, the two conductive pieces are connected with the two static parts respectively, and the two conductive pieces extend in the direction close to each other; the movable contact piece is movably arranged in the contact cavity and is used for being in contact with or separated from the two conductive pieces; and the arc guide structure is arranged on the movable contact piece and is configured to guide arc flow generated in the contact and separation process of the movable contact piece and the static contact piece.

The embodiment of the present application discloses a kind of magnetoresistive sensor layer structures for laser annealing, comprising: substrate;Magnetic resistance sensing unit is located on substrate, and antiferromagnetic pinning layer or permanent magnetic bias layer is included in magnetic resistance sensing unit;Top heat-absorbing layer located above magnetic resistance sensing unit and / or bottom heat-absorbing layer located below magnetic resistance sensing unit, the product of the volume specific heat density of top heat-absorbing layer is greater than the product of the volume specific heat density of top electrode layer, the product of the volume specific heat density of bottom heat-absorbing layer is greater than the product of the volume specific heat density of bottom electrode layer, when the write temperature of antiferromagnetic pinning layer or permanent magnetic bias layer is higher than the respective corresponding blocking temperature or Curie temperature, the temperature of bottom electrode layer and top electrode layer is lower than the respective corresponding melting point temperature;Laser absorption layer and laser transparent layer.The embodiment of the present application can solve the problem that electrode layer is easy to ablate.

The application discloses a thermal oxidation furnace and a thermal oxidation process. The thermal oxidation furnace comprises a combustion zone and a cooling zone connected in sequence from top to bottom; the bottom of the combustion zone is provided with a Venturi extension pipe extending to the lower part of the cooling zone; the combustion zone comprises a burner and a combustion chamber from top to bottom, the burner is used for igniting the waste gas and oxidant delivered to the thermal oxidation furnace and then delivering them to the combustion chamber; the cooling zone comprises a cooling liquid spraying end, the cooling liquid spraying end is arranged at the connection between the combustion zone and the cooling zone and is in communication with the nested space formed by the cooling zone and the Venturi extension pipe; the thermal oxidation furnace is also provided with a circulating flue gas pipe; the first port of the circulating flue gas pipe is arranged in the cooling zone and is in communication with the nested space, and the second port of the circulating flue gas pipe is arranged at the inlet of the combustion chamber. The thermal oxidation furnace can reduce the generation of NO x , effectively prevent the ablation of the Venturi extension pipe, and the product treated by the thermal oxidation furnace can be directly discharged after subsequent cooling treatment.