17results about How to "Reduce ablation" patented technology

The vacuum contact comprises a static end contact and a moving end contact, the static end contact comprises a first transverse magnetic assembly and a first longitudinal magnetic assembly, the first transverse magnetic assembly comprises a first spiral arm contact piece and a first conducting rod, the first longitudinal magnetic assembly is of a hollow structure, and the first longitudinal magnetic assembly is arranged on the peripheral side of the first conducting rod in a sleeving mode; the first radial arm contact blade is fixed at one end of the first conducting rod and is in contact with the first longitudinal magnetic assembly; the moving end contact comprises a second transverse magnetic assembly and a second longitudinal magnetic assembly, the second transverse magnetic assembly comprises a second radial arm contact blade and a second conducting rod, the second radial arm contact blade is fixed at one end of the second conducting rod and is arranged opposite to the first radial arm contact blade, and the second longitudinal magnetic assembly is of a hollow structure and is fixed on the first radial arm contact blade. The second longitudinal magnetic assembly sleeves the peripheral side of the second conductive rod. The advantages of the two magnetic fields are combined to control movement and diffusion of the vacuum arc, and the breaking capacity of the vacuum contact is improved from the aspect of mechanism.

The invention belongs to the field of aero-engine combustion chamber outlet parameter measurement, and particularly relates to an aero-engine combustion chamber outlet sample gas sampler, which adopts a local impact cooling heat exchange structure, improves the temperature resistance of the windward side of the sampler, and can prolong the service life of the sampler in a combustion chamber outlet complex parameter measurement process. The flow of cooling water is greatly increased, and the cooling capacity of the whole structure is improved; and the mounting seat cavity is designed to cool the mounting seat, so that the possibility that the mounting seat is ablated in a high-temperature state is reduced.

The invention belongs to the technical field of composite material preparation, and particularly relates to a tungsten infiltrated copper composite material and a preparation method thereof. According to the invention, through a multi-scale through pore network formed by'prefabricated material construction ', molten copper liquid can be rapidly filled along a large pore channel and fully permeates into the tail end of a small pore, so that the defect of'black core' generated by closed pores is thoroughly avoided. According to the prepared composite material, the tungsten phase and the copper phase respectively form a stable and communicated three-dimensional network, so that the unification of high conductivity (greater than or equal to 60% IACS), high strength and toughness (hardness greater than or equal to 100 HB) and excellent arc ablation resistance is fundamentally and synergistically realized, and the long-standing limitation of'impossible performance triangle 'is effectively broken through. And the process is high in integration level, green and remarkable in strengthening effect, and process simplification, environmental protection strengthening and performance improvement are achieved at one stroke. The advantages of raw materials and process cost are outstanding, the industrialization prospect is wide, and the relationship among high performance, designability and mass productivity is perfectly balanced.

A molded case circuit breaker comprises an operating mechanism, a contact mechanism and an interlocking mechanism, an operating handle drives a moving contact to move through the operating mechanism, the interlocking mechanism comprises an interlocking piece and an interlocking spring, and the interlocking spring is used for driving the interlocking piece to lock the moving contact in a state that the moving contact cannot be in contact with a static contact. In the process that the operating handle moves from the opening position to the closing position, when the operating handle moves to the interlocking position, the operating handle or the operating mechanism drives the interlocking piece to unlock the moving contact, the operating handle is driven by the energy storage spring to move to the opening position and the closing position, and when the operating mechanism is not closed in place, the interlocking piece is driven by the energy storage spring to unlock the moving contact. According to the technical scheme, pilot connection between the moving contact and the static contact can be avoided, an operator can be helped to judge the working state of a product, misjudgment is avoided, potential safety hazards are reduced, when the operating handle moves to the action position, the closing force of the energy storage spring is larger, the moving contact can be driven to make contact with the static contact rapidly, and the rapid closing function is achieved.

The utility model discloses a steel core reinforced FRP pultruded section breaking and cutting device, and relates to the technical field of cutting equipment, the steel core reinforced FRP pultruded section breaking and cutting device comprises a rack, the inner bottom wall of the rack is provided with a section conveying piece, the inner top wall of the rack is fixedly connected with an electric push rod in an inserted mode, and the extending end of the electric push rod is fixedly provided with an adjustable double-head cutting piece. The adjustable double-head cutting piece is blocked through the blocking frame, so that the possibility that the adjustable double-head cutting piece directly cuts a cutter steel core is reduced, the two cutter heads of the adjustable double-head cutting piece are used for cutting the steel core and FRP respectively, the loss increase of the cutter heads is reduced, and the possibility that the FRP part on a sectional material is ablated and blackened is reduced; the first motor drives the rotating disc to rotate to control the section bar to rotate, when the two side plates expand, the hinge rod is promoted to be unfolded, the two section bar conveying cylinders are pulled to contract, and therefore the section bar is clamped through the section bar conveying cylinders so that the section bar can be conveyed conveniently, and the section bar is more convenient to rotate and convey.

The utility model provides an anti-arcing washing timer, which is characterized in that a reed group comprises a first reed positioned on the inner side and a second reed positioned on the outer side, both the first reed and the second reed are provided with contacts, a cam is provided with gear teeth, the gear teeth comprise inner gear teeth and outer gear teeth, the first reed is always elastically propped against the inner gear teeth, and the second reed is always elastically propped against the outer gear teeth. The second reed has the trend of always abutting against the outer gear teeth, the inner gear teeth and the outer gear teeth each comprise a tooth back side and a tooth end face, the tooth back side is a curved surface with the radius gradually increased, the tooth end face extends from the tail end of the tooth back side to the center direction of the cam, the radius of the tooth end face changes suddenly, and the contact is switched between the contact state and the disconnection state along with rotation of the cam. In the pair of reed groups of the washing timer, the two reeds can move along with the rotation of the cam, so that the disconnection and contact of the contacts can be quickly completed, the duration of sparks and arcing generated during the contact and disconnection of the contacts is short, the ablation process of the contacts is slowed down, and the service life of the product is prolonged.

This utility model relates to an air outlet structure for a miniature circuit breaker. By setting a first air outlet and a second air outlet on the housing, a multi-channel arc-extinguishing path is formed. During the operation of the circuit breaker, the electric arc and heat generated inside can be quickly dissipated through these two air outlets, preventing the airflow from interfering with each other within the arc-extinguishing assembly. This effectively reduces the residence time of the electric arc inside the circuit breaker. The first air guide wall between the arc-extinguishing assembly and the first air outlet, and the second air guide wall between the arc-extinguishing assembly and the second air outlet, play a role in precisely guiding the airflow. When an electric arc is generated, the air guide wall can guide the airflow in an orderly and uniform manner to the arc-extinguishing assembly, forming a stable and suitable airflow field around the arc-extinguishing grid. This airflow field helps to quickly remove the heat and plasma generated by the electric arc, accelerate the arc extinguishing process, improve the arc extinguishing efficiency, reduce the erosion of the internal components of the circuit breaker by the electric arc, and enhance the breaking capacity and reliability of the circuit breaker.

This invention relates to the field of intelligent distribution cabinet technology, specifically to an intelligent power grid distribution cabinet and its protection method with real-time monitoring and interlocking protection. The cabinet includes: a distribution cabinet body containing a circuit breaker and a disconnecting switch; an intelligent execution module installed on the circuit breaker; the disconnecting switch comprising: multiple sets of insulation groups, each set including two sets of insulating posts; a conductive arm group rotatably connected to one of the insulating posts; an elastic conductive component including two sets of elastic abutment structures and a clearance structure disposed between the two sets of elastic abutment structures; when the conductive arm group extends or retracts along its length, it can push the clearance structure aside and fit against the elastic abutment structure; and an energy storage structure with a trigger plate on a follower plate. The trigger plate cooperates with the energy storage structure to enable the energy storage structure to have a first state and a second state that are switched by being pulled, thereby driving the conductive arm group to move rapidly and shortening the time of arc generation and duration.

The invention belongs to the technical field of power supply management, and particularly provides an alternating current and direct current power supply isolated output switching device, which comprises a power supply input and preprocessing module used for accessing an alternating current main power supply and a direct current standby power supply and performing preprocessing protection on the two power supplies respectively; the power supply detection and control module is used for acquiring electrical parameters of the alternating-current main power supply and the direct-current standby power supply in real time, judging a power supply state of the power supply according to an acquisition result and outputting a control signal; the relay isolation switching module comprises two relays respectively corresponding to the main power supply branch and the standby power supply branch, and realizes physical isolation and automatic switching of the AC / DC power supply based on the control signal; the output adaptation and protection module is used for providing a corresponding output branch according to the load type and protecting an output power supply; wherein the two relays adopt an interlocking design to ensure that the two relays are not conducted at the same time.

This invention discloses a rotary multi-contact isolating switch, comprising an operating part, a positioning part, a switching part, and a driving part. The operating part includes an upper housing, a handle, and a rotating shaft. The positioning part includes a positioning housing, a positioning gear, and a telescopic positioning assembly. The positioning gear is fixed to the bottom end of the rotating shaft, and the telescopic positioning assembly cooperates with the positioning gear to achieve position locking. The switching part includes a lower housing, a stationary contact, and a moving contact assembly, with the moving contact assembly slidably installed within the lower housing. The driving part includes a driven ring and a connecting shaft. The connecting shaft transmits the rotational motion of the rotating shaft to the driven ring, which drives the moving contact assembly to quickly disconnect from the stationary contact. This invention achieves accelerated disconnection of the moving and stationary contacts through the cooperation of the driven ring and the contact support block, effectively shortening the arcing time. The moving contact assembly adopts a double-spring structure, separating the contact pressure of the raised driven wheel from the contact pressure of the contact point, improving the contact stability and vibration resistance reliability during long-term operation. The overall structure is stable and highly reliable.

The embodiments of this disclosure provide a method, apparatus, device, and storage medium for reducing heat and drag in hypersonic vehicles, including: acquiring target flight state data of the vehicle, wherein the target flight state data includes flight Mach number and angle of attack; acquiring target setting parameters corresponding to the target flight state data of the vehicle, wherein the target setting parameters include shock bar size parameters, reverse jet pressure ratio, lateral jet pressure ratio, and number of lateral jet directions; and adjusting the target setting parameters of the vehicle based on the target flight state data, which can effectively reduce the aerodynamic heat and drag of the vehicle at non-zero angles of attack, improve the aerodynamic performance of the vehicle, and greatly increase its maneuverability.

The application provides a crystalline silicon solar cell, a preparation method and application thereof. The crystalline silicon solar cell comprises a substrate, a thin film layer and an electrode which are sequentially arranged. The thin film layer comprises a first thin film area and a second thin film area. The thickness of the first thin film area is greater than that of the second thin film area. The electrode is arranged on the second thin film area and forms a contact with the substrate. By reducing the thickness of the second thin film area which is in contact with the electrode, the contact resistance between the electrode and the substrate is improved, the recombination in the electrode area is reduced, the average open circuit voltage is increased, and the optical performance and the improvement window of the passivation performance of the first thin film area which is not in contact with the electrode are increased. The crystalline silicon solar cell solves the problem that the electrode ablation capacity is incompatible with the thin film composition and thickness, effectively improves the cell efficiency, and the preparation method is compatible with the screen printing high-temperature sintering process, and large-scale mass production at low cost can be realized.

The application discloses a contact structure with active vacuum arc dispersing function based on internal phase change driving, which comprises a static side contact piece, a static side conductive rod fixedly connected with the static side contact piece, a dynamic side contact piece oppositely arranged with the static side contact piece, and a dynamic side conductive rod fixedly connected with the dynamic side contact piece, wherein arc dispersing devices are arranged in the static side contact piece and the dynamic side contact piece, and the two arc dispersing devices are symmetrically arranged with the radial center line of the contact structure as the symmetric axis. The arc dispersing device is a hollow sealing structure, the side close to the contact surface is a flexible metal diaphragm, the inside is filled with liquid low-boiling point working medium, and the bottom is provided with a capillary core structure made of porous sintered material. The contact structure can drive the phase change of the built-in working medium by the energy of the arc itself, generate transient mechanical pulse to make the arc root continuously move on the anode surface, thereby destroy the stable heat conduction of the arc to the local anode, inhibit the anode ablation from the source, and improve the anti-ablation ability and service life of the vacuum switch.

The application relates to a grounding switch with multiple short-circuit current switching capacity, and belongs to the technical field of gas insulated switch cabinets. The grounding switch comprises a grounding contact and a bus contact; the grounding contact comprises a grounding arc contact, a grounding contact compartment plate, a grounding contact passage hole and a grounding contact support plate; the grounding arc contact is separated into independent compartments by the grounding contact compartment plate; the bus contact comprises a bus conductive contact, a bus arc contact and a bus contact arm; the grounding contact and the bus contact are both moving contacts; when the grounding arc contact and the bus arc contact are close and the distance reaches a first breakdown distance, a discharge arc is generated, the discharge arc occurs between the grounding arc contact and the bus arc contact; the bus arc contact completely enters an independent compartment of the grounding arc contact, and the grounding conductive contact and the bus conductive contact are effectively connected. The grounding switch improves the short-circuit current switching capacity of the grounding switch.

The utility model discloses a thickness cooling air device for overflow method substrate glass forming, the thickness cooling air device comprises two soaking box bodies and a cooling mechanism which are arranged at the bottom of an overflow brick, the soaking box bodies are located on the two sides of substrate glass respectively, and the cooling mechanism comprises a plurality of first cooling air pipes, a second cooling air pipe and a fixing assembly; the first cooling air pipe is arranged outside the soaking box body, and an air inlet of the first cooling air pipe is used for being communicated with cooling air; the second cooling air pipe penetrates through the soaking box body, an air outlet of the second cooling air pipe is close to the substrate glass, and the second cooling air pipe is made of a high-temperature-resistant material; and the first cooling air pipe and the second cooling air pipe are communicated through a fixing assembly. The problems that the thickness of the glass plate is repeatedly adjusted, the efficiency is low and the precision is poor due to the fact that the relative position between cooling air and the glass plate cannot be accurately adjusted due to the fact that a thickness air pipe is prone to deformation after long-term use can be solved.

This invention discloses a double-walled small bend tube and a recirculation combustion chamber, comprising an inner wall and an outer wall spaced apart. One end of the inner wall near the flame tube is connected to the other end of the outer wall near the flame tube. The inner and outer walls form a cavity for forming a cooling gas film. The outer wall has n rows of impact cooling holes for introducing cooling gas into the cavity. Each row of impact cooling holes is evenly distributed along the circumferential direction of the outer wall and has the same diameter. The diameter of the n rows of impact cooling holes increases gradually from the end of the outer wall near the flame tube to the end away from the flame tube, so that the flow rate of cooling gas impacting the inner wall increases gradually with the distance from the flame tube. This can effectively reduce the highest wall surface temperature at the end of the inner wall, reduce the ablation and uneven deformation of the double-walled small bend tube, extend its service life, and effectively solve the air leakage problem between the small bend tube and the casing under different vibrations and thermal expansion deformation, ensuring a seal.

The invention provides a preparation method and device of a high-dispersity metal nano material. The preparation method comprises the following steps: taking a metal material as an anode, and evaporating the metal anode through plasma working gas and arc discharge in a vacuum reaction chamber to form metal nano vapor; introducing quenching gas above the metal anode to form a quenching area, and quenching the metal nano steam to obtain initial metal nano particles; and introducing a form guide gas at a preset angle to form a guide gas flow, completing condensation, solidification and form determination of the initial metal nanoparticles in the moving guide gas flow, and introducing the initial metal nanoparticles into a collector communicated with the vacuum reaction chamber for deposition to obtain the high-dispersity metal nanomaterial. The device comprises a reaction chamber, a quenching gas pipe, a form guiding gas pipe, a collector, a metal anode and a cathode. The method and the device can be used for preparing the metal nano material with good dispersion and uniform particle size distribution.