58 results about "Railgun" patented technology

The invention discloses an electroplastic cross wedge mill. The electroplastic cross wedge mill mainly comprises a radial adjusting mechanism, a rack, a roller system, a guide plate mechanism, an electroplastic device, a base, a pulsed power supply, a connecting rod, an upper bearing pedestal, a conical roller bearing A, a lower bearing pedestal, a conical roller bearing B, an end cover, a press-down screw and a press-down nut. The cannonball moving direction is stable, shooting accuracy is high, the range is long, and the electroplastic cross wedge mill is suitable for remote and precise fight of an electromagnetic railgun. Conventional cross wedge rolling equipment is improved, deformation resistance of a rolled piece is lowered, plasticity, tenacity and other mechanical properties are improved, design is reasonable, the structure is simple, time and labor are saved, heating equipment is not needed, operation is easy, and the electroplastic cross wedge mill has an obvious effect on rolling metal which is poor in plasticity, high in deformation resistance and hard to deform under normal temperature, and can be used for conducting cross wedge rolling on metal or alloy bar materials of different dimensions.

An electromagnetic railgun (10) comprising at least two elongated high voltage rails (11), a sliding armature (50) making electrical contact with each high voltage rail (11), at least two elongated metal support beams (14) adapted to provide mechanical strength to the railgun (10), said support beams (14) being substantially parallel to the high voltage rails (11), and a plurality of metal support plates (30) aligned circumferentially around the support beams (14) and along the length of the railgun (10), said support plates (30) adapted to provide additional mechanical strength to the railgun (10); wherein the support plates (30) are electrically isolated from each other and from the support beams (14).

The invention discloses an electromagnetism rail gun which the structure is: the insulation material is between the first rail and second guide rail which are all opened with the symmetrical 'V' slot. The angle of the slot is 30-60degree. The solid armature is set between the first and second guide rail. The two symmetrical side wings extend to both sides from the body which the shape and size is matched to the 'V' slot. The upper and lower surface of the two side wing front contacts with the 'V' slot to form the electrical contact surface of the solid armature and the guide rail; the back end of the two side wings are separate with the two guide rail. The invention can control the damage of the transitional voltaic arc, so it can prolong the gun using life but getting the higher shooting speed (>3kms), so it has the widely future.

An electromagnetic railgun projectile is disclosed which includes an aeroshell having a substantially flat surface extending along the length thereof. The substantially flat surface is configured to increase the lift-to-drag ratio of the projectile during reentry. The projectile also includes an armature integrated into the aeroshell substantially near the center-of-gravity of the projectile, and a plurality of extendable flaps attached to the aeroshell. The flaps are capable of stabilizing the projectile during an unguided portion of its flight and maneuvering the projectile during a guided portion of its flight.

The invention provides a double-shaft compensation air-cored pulse generator and a pulse molding system and a pulse molding method of the double-shaft compensation air-cored pulse generator, relates to a pulse generator and a pulse molding method of the pulse generator, and belongs to the field of electrical machines. The aim provided by the invention is to solve the problem that an ideal pulse current wave shape required by the existing selectable passive compensation air-cored pulse generator for outputting a railgun contradicts self-excitation efficiency. The double-shaft compensation air-cored pulse generator comprises a compensation winding and a magnet winding which are in orthogonal distribution and respectively provide quadrature axis compensation and straight axis compensation. The pulse molding system of the double-shaft compensation air-cored pulse generator comprises a main discharge thyristor, a rectifier, a fly-wheel diode, an excitation capacitor and an excitation thyristor. The pulse molding method of the double-shaft compensation air-cored pulse generator comprises the following steps: a prime motor drags a rotor to reach rated speed, the rotor is separated from a generator the main discharge thyristor is closed after excitation current reaches rated vale through positive feedback self-excitation process; an armature winding discharges to load; and the quadrature axis compensation winding short circuited with the rotor and the freewheeling excitation winding induce current to compensate so as to output required pulse current waveform. According to the invention, the miniaturization of a generator pulse power supply can be realized.

The invention relates to a track, armature of an electromagnetic railgun and the electromagnetic railgun, and belongs to the technical field of electromagnetic railguns. The track, armature of the electromagnetic railgun and the electromagnetic railgun solves the problem that track and armature ablation are serious in the prior art. The guiding face of the track is provided with two curved face protrusions with uniform distribution, and the curved face protrusions are arranged in the axis direction of the track. The curved face protrusions has the same shapes along the section perpendicular tothe axis of the track, and the ratio of the height of each section shape to a chord length is 0.2-0.3. The section shape, section size and position of curved face sunkens of the guiding face of the armature and the curved face protrusions of the guiding face of the track are matched with each other. According to the track, armature of the electromagnetic railgun and the electromagnetic railgun, askin effect and a proximity effect are better utilized, thus current distribution in the track is relatively uniform, the maximum current density is small, the ablation phenomenon on the track surface is alleviated advantageously, and the condition of serious ablation of the track at the corners is avoided.

The invention provides a light anti-high overload integrated bullet holder for an electromagnetic rail gun. The light anti-high overload integrated bullet holder comprises a bullet holder main body, aclamp type bullet belt, a flying body, a protection holder and a ring type bullet belt. The bullet holder main body comprises a protection pipe internally provided with a containing cavity, one end of the protection pipe is provided with a bottom holder for sealing the containing cavity, the clamp type bullet belt is composed of two C-shaped clamping blocks with the same structure, the two clamping blocks are symmetrically installed on the protection pipe through buckles, the flying body is composed of a conical air cap, a cylindrical bullet body and a tail wing with fins, the protection holder is installed in the containing cavity and fixes the tail wing, and the ring type bullet belt is installed on the outer surface of the protection holder. The contact parts of the bullet holder mainbody and the flying body have no structural design and are only in transition fit, by means of the design, the machining difficulty of the bullet holder can be lowered, the mass center of the flying body is made to move forwards, flying stability is improved, meanwhile, friction resistance on the surface of the flying body is also reduced, and speed keeping performance of the flying body is improved.

The invention discloses an electromagnetic propulsion device. The electromagnetic propulsion device comprises an electromagnetic railgun and a thermoelectric power generation device. The electromagnetic railgun comprises two launch trajectories and an armature which is arranged between the launch trajectories. The thermoelectric power generation device comprises cold end substrates, hot end substrates arranged on the launch trajectories and thermoelectric modules arranged between the cold end substrates and the hot end substrates. The hot end substrates are used for conducting heat of the launch trajectories. The cold end substrates are used for providing low-temperature cold sources. The thermoelectric modules are used for conversion between heat / cold and electric energy. According to the electromagnetic propulsion device, the thermoelectric power generation device is disposed on the electromagnetic railgun; the heat of the launch trajectories is conducted through the hot end substrates, so that the temperature of the launch trajectories is decreased and loss caused by overheating of the launch trajectories is prevented to a certain degree; meanwhile, the thermoelectric modules convert heat into electric energy, so that the electric energy conversion rate of the electromagnetic railgun is effectively increased.

The invention belongs to the technical field of electromagnetic rail guns, and particularly relates to a series connection common rail type double-tube rail gun. According to the series connection common rail type double-tube rail gun proposed in the technical scheme of the invention, rails of multi-tube launchers are arranged in parallel to be integrated mainly according to the distribution characteristics of a magnetic field of the electromagnetic rail gun, and the series power supply scheme is adopted to form a common rail type double-tube rail gun, so that the purpose of increasing the inductance gradient and the launching efficiency is achieved. At the same time, the scheme can effectively improve the fire density, so as to improve the comprehensive performance of the electromagneticrail gun. According to the series connection common rail type double-tube rail gun, a new solution for integrating electromagnetic rail gun systems, improving the launching efficiency and the fire density is provided, and the series connection common rail type double-tube rail gun is of great significance for the engineering application of the electromagnetic rail gun.

The invention discloses a circulating cooling system for a railgun rail and a cooling method. Outlets of a first pneumatic powder suction pump and a second pneumatic powder suction pump of the system are connected with a spray nozzle of the railgun rail. The railgun rail is connected with a gas separation device through a pipeline. The gas separation device is connected with a Fe2O3 reproduction device through a pipeline. The Fe2O3 reproduction device is connected with the second pneumatic powder suction pump through a pipeline. The railgun rail is mainly composed of a reaction channel, a trapezoid spray nozzle, a rail inner wall and a rail outer wall. A hollow communicated reaction channel is formed by the rail inner wall and the rail outer wall. The diameter of the reaction channel ranges from 20 mm to 25 mm. The thickness of the rail outer wall ranges from 4.5 mm to 5.5 mm. The side, close to the outer wall, of the inlet end of the reaction channel is provided with the trapezoid spray nozzle. The reaction channel is of a U-shaped structure. According to the circulating cooling system, the spray-out pressure of the spray nozzle is controlled by controlling the flow speed of a reaction medium entering the outer wall channel, continuously circulating cooling can be guaranteed, and the temperature of the railgun rail is lowered quickly.

A projectile, such as a railgun-launched projectile, includes a single-piece body that is additively manufactured. The single piece body includes fuel within it, and one or more cavities for receiving an oxidizer. The body also defines one or more combustion chambers therein for combustion of the fuel and oxidizer as part of a divert thruster system. Thus the projectile is able to fully contain the divert thruster system within the single-piece body without using any hot gas seals as part of the system. The body may also define a cavity for receiving a pressurized fluid, used as part of a cold-gas attitude control system of the projectile. The body may also define passages between the pressurized fluid cavity and other parts of the attitude control system, such as valves and / or nozzles that are outside of the body, for example being aft of the one-piece body.

The present invention provides a method for depositing powder particles on a substrate. The method comprises forming a planar plasma armature, accelerating the plasma armature, accelerating a column of gas with the plasma armature; and accelerating the powder particles with the column of gas. The present invention provides for a railgun, comprising first and second conducting rails, and first and second insulating rails. The insulating and conducting rails form a bore of the railgun. The first and second conducting rails are separated by the insulating rails. At least one of the rails has a port in the wall thereof, the port is adapted to introducing powder particles into the bore.

The invention relates to a high-conductivity abrasion-resistant coating for a guide rail and a preparation technology thereof. The coating comprises the following chemical components by content: 45 to 55% of Mo, 15 to 25% of Cu, 6 to 10% of Cr, 1 to 3% of B and 2 to 4% of Si, and the balance being Ni. The preparation technology comprises the steps like surface down cutting of the to-be-coated guide rail, surface cleaning of the guide rail, shield protection, sand-blasting roughening, coating preparation and coating grinding processing. The preparation technology is characterized in that a high-speed plasma spraying technology is adopted, a uniform and compact large-thickness, high-conductivity and abrasion-resistance coating can be prepared on the surface of an electromagnetic railgun launching guide rail, the thickness of the grinded coating is 1.0 to 1.1 mm, the bonding strength of the coating and the guide rail is 20 to 35 MPa, the microhardness of the coating is 450 to 600 HV, and the electric conductivity is 5 to 12% IACS. The obtained high-conductivity abrasion-resistant coating is mainly used in special parts like the electromagnetic railgun launching guide rail, the surface hardness, abrasion resistance and electrical erosion resistance of the guide rail can be effectively improved, the service life is prolonged, the thermal hardness of the surface of the guide rail is improved, the failure rate of grinding is decreased, and the coating has important engineering application value.

The invention belongs to the technical field of electromagnetic rail guns, in particular to a common-rail type dual-tube rail gun. According to the common-rail type dual-tube rail gun in the technicalscheme, rails of a multi-rube emitter and an emitter structure are reasonably topologized to form a common-rail type dual-tube rail gun emitter mainly according to magnetic field distribution characteristics of the electromagnetic rail gun, so that the purposes of increasing an inductance gradient and improving emitting efficiency are achieved. Meanwhile, the scheme can effectively improve firepower density, so that the combination property of the electromagnetic rail gun is improved. The common-rail type dual-tube rail gun disclosed by the invention discloses a novel solution for integratingan electromagnetic rail gun system, and improving emitting efficiency and firepower density, and is of very great significance for engineering application of the electromagnetic rail gun.

Decades of research and development have been invested in various forms of railguns, coilguns and mass drivers. See http: / / settlement.arc.nasa.gov / 75SummerStudy / Table_of Contents1.htmlResearch at the Space Studies Institute in the 1980s refined the mass driver concept. See http: / / ssi.org / introduction-to-research / research-report / # mass-driver-iiiThe innovation of the Electromagnetic Regolith Excavator is to eliminate the use of a bucket or other container that is accelerated by the magnetic fields. Instead, magnetic particles in the regolith itself (nickel-iron grains and / or magnetite) are put into motion and they carry along with them a to-be-determined fraction (perhaps all) of the co-resident non-magnetic regolith particles.The Electromagnetic Regolith Excavator applies only attractive forces: no anchoring is required. This enables robotic and crewed spacecraft to safely collect surface material from asteroid targets that may be tumbling. Because no hard connection is required, no strong hazardous forces can be imparted to the collection apparatus aboard the spacecraft.

The invention relates to a gun muzzle arc suppressor of an electromagnetic railgun, belongs to the technical field of electromagnetic railguns, and solves the problem that residual electric energy andmagnetic energy after launching cannot be consumed in the prior art. The gun muzzle arc suppressor comprises a connecting part and an arc suppressing part, wherein the connecting part comprises a first connecting part and a second connecting part, and the arc suppressing part comprises a first arc suppressing part and a second arc suppressing part; one end of the first connecting part is connected with one rail of the electromagnetic railgun, and the other end is connected with the first arc suppressing part; one end of the second connecting part is connected with the other rail of the electromagnetic railgun, and the other end is connected with the second arc suppressing part; the first arc suppressing part and the second arc suppressing part are both provided with arc suppressing ends,the arc suppressing end of the first arc suppressing part is aligned to that of the second arc suppressing part, and a gap of 1-2 mm is reserved. According to the gun muzzle arc suppressor, dischargecan be realized by induced voltage at the arc suppressing ends, residual magnetic energy on the rails after projectile launch is consumed, and damage caused by breakdown of a gun muzzle is avoided.

The invention provides a COMSOL-based dynamic electromagnetic gun model construction method, which is suitable for armatures with complex shapes, can calculate electromagnetic distribution conditions in an electromagnetic gun and a bore, and comprises the following steps of: geometrically modeling a track gun model based on COMSOL, formulatively describing the shapes of the head and the tail of the armature, and setting material parameters based on the COMSOL; and carrying out physical field setting, mesh generation and solving calculation in the COMSOL. According to the invention, the limitation of the armature shape on simulation research is broken through, and the dynamic simulation of the launching process can be realized.

The invention discloses a train aerodynamic performance simulation model test device. The train aerodynamic performance simulation model test device is provided with an acceleration segment, a monitoring segment and a deceleration segment in sequence; electromagnetic railgun guide rails are arranged on the acceleration segment, the monitoring segment and the deceleration segment, train rails are laid on the electromagnetic railgun guide rails, a train model is arranged on the train rails, and an armature is fixedly connected with the middle of the bottom of the train model; a tunnel model is arranged on the monitoring segment, and a wind speed detection system and a wind pressure detection system are arranged inside the tunnel model; a bump wall is arranged on the tail section of the deceleration segment, and side baffles are arranged at the two sides of the deceleration segment. By adopting the train aerodynamic performance simulation model test device, a model train can have ideal high speed, and the aerodynamic effect problem can be analyzed when a train runs in a tunnel at high speed. According to a test method of the train aerodynamic performance simulation model test device,by conducting diversified control contrast on the speed, type and proportion of the train model, experimental data support is provided for optimizing the train model and the fracture surface of the tunnel. Therefore, the train aerodynamic performance simulation model test device and the test method thereof have important theoretical significance and application value and have the advantages of being wide in application range and high in reliability and test accuracy.

The invention discloses an electromagnetic gun arc extinguishing device based on RSD, and belongs to the field of electromagnetic emission. The electromagnetic gun arc extinguishing device based on RSD is connected with an armature on an electromagnetic railgun device in parallel, a trigger switch driving module and a reset circuit driving module respectively drive an RSD trigger circuit and a magnetic switch reset circuit to work when receiving control signals; when the RSD trigger circuit works, the RSD is triggered to be switched on; the magnetic switch reset circuit is used for helping themagnetic switch to realize magnetic reset before working; when the RSD is triggered, the magnetic switch isolates the RSD from external voltage to prevent the RSD from being damaged; and controllingthe turn-on of the RSD can control current transfer across the armature. According to the electromagnetic gun arc extinguishing device based on the RSD, a RSD switching device belongs to a semiconductor device, and has the advantages of stable work, strong current endurance capability, capability of bearing a current peak value up to hundreds of kA, capability of bearing bearable current rising rate which is hundreds of kA / mu s and low conduction impedance, so that the electromagnetic gun arc extinguishing devic has the advantages of long service life, high current transfer speed and the like.

A railgun which has a conductive lubricant and system of delivery reduces the electrical resistance and friction of the armature-rail sliding contact, thereby decreasing the amount of heat generated at the electrical contact. The conductive lubricant may be a ternary alloy of bismuth, indium and tin. The system of delivery for the conductive lubricant may include a plurality of surface reservoirs formed in either the rail surface, the armature face, or both.

The invention discloses an arc suppression and silencing device for an electromagnetic rail gun. The arc suppression and silencing device is composed of an impedor and a sleeve with an inner layer grid structure, the impedor is installed at a gun muzzle and conducts currents, and the sleeve is used for isolating and absorbing electric arcs and noise. According to a designed sleeve type gun muzzle arc suppresser and silencer, based on the magnetic flux compression and follow current principle, the current flowing through an armature when the armature goes out of a bore is greatly reduced, generation of electric arcs is reduced, and meanwhile arc breaking, arc absorbing and sound absorbing structures are designed so that flash and noise of the gun muzzle can be effectively reduced.

The invention relates to a multistage inductive energy storage type pulse power supply and a power supply method. The multistage inductive energy storage type pulse power supply comprises n power supply modules, wherein the power supply modules are used for supplying power for a Load, circuit structures of the power supply modules are the same, and the power supply modules are mutually in parallelconnection; each power supply module is of a STRETCH meat grinder topological structure; furthermore, the n power supply modules share a same current conversion capacitor C. According to the multistage inductive energy storage type pulse power supply, the plurality of power supply modules are in parallel connection to provide sufficient energy for railgun launching; all the power supply modules are triggered at the same time, so that the mutual charging phenomenon among the modules is avoided; the power supply circuits and the Load are separated, so that power supply reliability and power usesafety are improved; all the power supply modules share the current conversion capacitor, so that the volumes of the power supply modules are greatly reduced.

The invention belongs to the technical field of electromagnetic emission, and provides a novel n-stage inductance energy storage type large current source circuit topological structure which comprisesa primary power supply, an n-stage inductance series charging and parallel discharging basic loop topological structure and an electromagnetic rail gun load structure. According to the novel inductance energy storage type large current source circuit structure provided by the invention, the thyristor is adopted as a switching device in a switching part, and reverse voltage is applied to the switching device through the reverse diode connected with the switching device in parallel, so that reliable turn-off of the thyristor can be realized, and the controllable performance of a system is effectively improved. An optimized backward diode is added to a control part in the topological structure of the circuit to fully isolate a charging loop, so that the linear rise of inductive current and the stability of capacitor voltage in the charging process are ensured. Ripples of the capacitor and the inductor are avoided, and the charging efficiency of the power supply is improved. Besides, then-stage inductance energy storage type large current source circuit topological structure provided by the circuit is relatively simple in structure and has relatively good expansion performance.

The invention relates to a method for creating and actually measuring axial temperature gradient distribution of an electromagnetic gun track, and belongs to the technical field of electromagnetic rail guns. According to the method, an electromagnetic track is divided into a high-temperature section, a medium-temperature section and a low-temperature section on the basis of analytical calculation and public literature data, and under the condition of no actual missile launching, the electromagnetic track is heated through three sets of unequal-distance and power-adjustable heating pipes to create track temperature distribution after electromagnetic railgun launching. Temperature measuring points are arranged on the electromagnetic track and extend from the outer side of the rack to the position 1-2 mm away from the contact side of a pivot rail, a thermocouple is connected with a data acquisition instrument to obtain the real-time temperature of the temperature measuring points, and experimenters can conveniently adjust the number of the heating pipes and the heating power to achieve temperature distribution of the electromagnetic rail under various working conditions; the problem that the thermal management experiment research of the electromagnetic rail gun is difficult to carry out due to the fact that actual launching of the electromagnetic rail gun is complex is innovatively solved.