39 results about "Ejecta" patented technology

In one aspect, the present disclosure is directed to a system for protecting a vehicle from a mine. Upon detonation the mine may yield ejecta having an expected trajectory. The system has a first layer of material disposed outside of an underbody of a hull of the vehicle. The first layer includes a base disposed in a direction substantially parallel to the underbody and a protrusion that narrows as it extends away from the base in a direction opposing the expected ejecta trajectory. The system also has a second layer including a material having a shock wave transmission velocity that is higher than a shock wave transmission velocity of the material of the first layer. The system further has an exterior layer substantially covering the first and second layers, and the exterior layer has an exterior surface that faces away from the underbody and toward the expected ejecta trajectory.

The present invention discloses a system, device and method for providing an exhaust assembly adapted for use with a mass ejection drive system to produce rotational torque about the principle axis of the drive system. Representative features generally include a vane suitably configured to at least partially engage a mass ejecta stream to apply a net rotational torque about the principal axis of the drive system, and a tailfin coupled to the at least one vane. The tailfin is configured to selectively deploy from an at least partially stowed position in order to decrease the application of net rotational torque about the principal axis of the drive system.

An elongate ballistic protection apparatus is described and claimed herein which has minimal weight and maximum flexibility to conform to the most contorted and undulating ground surfaces. In use, it is immediately positioned below a military vehicle to protect the crew compartment positioned above said apparatus by extending transversely between the propulsive means and laterally along the direction of travel for the vehicle. The apparatus may detonate mines while operated by driven engagement over mine bearing terrains, but it will do so in a manner sufficient to defeat them without inducing unacceptable damages to either the vehicle or crew. Thereby, this invention provides a means to effectively disrupt the firing sequence of the explosive charges in these mines by contact with my minimal weight roller link chain. Beneficially, the blast gasses and ejecta of the mine simply vents through the open areas of my chain. This is a substantial improvement over devices having solid configurations or geometries.

The invention relates to a non-pollution and non-ejecta rapid cover opening device for a launcher container, and belongs to the field of launch technique. Before an aircraft is launched, under the trigger of the electric signal and the action of thrust produced by an electric actuator, a case cover can overcome weak link, and open quickly, and is locked to the box body after opening in place, the aircraft is out of the box after prelaunch preparation is completed. According to experimental verification, it is found that the achieved cover opening method has no smoke, and cannot produce any pollution to the seeker of the aircraft, and throws no debris, produce no damage to the other launching equipment on the ground, and is high in safety; the cover opening time is short, wherein the cover can be opened within 1 second; the device is simple in structure, strong in generalization, low in cost and good in practicability.

A mass separation device includes a transparent substrate and a plurality of small diameter cylindrically shaped orifices in the transparent substrate. The small diameter cylindrically shaped orifices include smooth wall surfaces and are not tapered. The small diameter cylindrically shaped orifices are drilled by photoacoustic compression and are clean and sharp and do not have ejecta mounds surrounding the orifice on the surface of the transparent substrate. The small diameter cylindrically shaped orifices in said transparent substrate are less than or equal to 1 μm in diameter. The transparent substrate is glass and preferably is borosilicate glass.

The invention provides an array type dry ice spray head and a gas-solid mixture generation method. The array type dry ice spray head comprises an upper cavity, a lower cavity and a spray head assembly. The upper cavity comprises an upper cavity rack, a liquid inlet pipeline arranged on the upper cavity rack in a penetrating manner and a plurality of first branch pipes vertically arranged on the liquid inlet pipeline; the lower cavity comprises a lower cavity rack, an air inlet pipeline arranged on the lower cavity rack in a penetrating manner and a plurality of second branch pipes vertically arranged on the air inlet pipeline, and the first branch pipes communicate with the second branch pipes. The spray head assembly comprises throttlers connected to the first branch pipes in a sleeving manner, gas mixing devices connected to the second branch pipes and nozzles arranged on the gas mixing devices in a sleeving manner. Each gas mixing device is provided with a plurality of ventilating holes annularly, an annular cavity is formed between each gas mixing device and each nozzle, liquid carbon dioxide flows into the throttlers through the liquid inlet pipeline and is mixed with compressed gas at the outlets of the throttlers to be ejected through the gas mixing devices or the annular cavities. The array type dry ice spray head is few in port and is arranged in an array manner, and has relatively good air impermeability and gas mixing effect. The spraying direction and the flow rate of gas-solid mixed ejecta can be adjusted, so that the array type dry ice spray head can be suitable for different working occasions.

The invention provides a novel energetic base material prepared from a porous material and a preparation method thereof. The novel energetic base material and the preparation method thereof solve the problem that a closure material prepared in China at present has the defects of a large ejecta size, long action time and a complicated structure. The preparation method of the novel energetic base material comprises that an amine perchlorate eutectic compound (SY) or nickel hydrazine nitrate (NHN) as a reagent is added with additives and then the mixture is filled into porous ceramics or porous copper so that the novel energetic base material is obtained. The novel energetic base material obtained by the preparation method has excellent compressive properties, sealing properties and temperature resistance, can explode into fine fragments fast and reliably under the action of output energy from a miniature ignition/detonation device, and can be used as a closure material for a novel solid rocket ramjet air-intake duct.

The invention provides a lithium ion battery combustion detection method. The detection method comprises steps as follows: arranging a collection device; determining a trigger mode; starting a fire source to cause battery combustion; collecting data; clearing residues and ejecta. The lithium ion battery combustion detection method provided by the invention has the advantages that the method is used for detecting the excitation source critical condition for inducing lithium ion battery combustion, high-temperature resistance as well as firing and combustion process and products of a battery, targeted prevention and control are realized, and the safety of the lithium ion battery is greatly improved.

The invention provides a cutting machine capable of controlling fracture by electrically controlled lasers. A control unit adopts alternating current to load electricity to realize the connection, identification and control functions of loaded electric appliances, and adopts intense magnetic fields to absorb integrally-fallen fragile waste materials, so that fragile materials which are easily destroyed through heating can be cut off fast and controllably by heating of laser beams; under the condition of heating of high-power intensity laser beams, the speed that a material surface temperature rises to a boiling temperature is fast, which is enough to avoid melt caused by heat conduction; a part of materials is vaporized into steam and disappears, and a part of materials is sucked back by auxiliary airflows from the bottom of a cutting slot as ejecta; the slot cut by the lasers is thin, the cutting surface is smooth, the cutting speed is fast, the thermal deformation is small, the laser cutting is in no contact with the material surface, the cutting machine is suitable for processing bulky commodities and the materials are saved, moreover, the cutting machine can be applied to sheet-metal processing of relevant industries such as heavy and light industries, medical industries and the like, cutting and shaping of rotators, stators and blades, manufacturing of various chains and parts of vehicular manufacturing industry, advertisement decoration and handicraft article manufacturing industries, etc.

The invention provides a magnetic separated laser oxidizing fusion cutting machine. The cutting machine is characterized in that oxygen or other active gases are adopted to replace inert gases to perform fusion cutting, and high-intensity magnetic fields are adopted to suck back wastes so as to replace an auxiliary air unit; under heating of high-power intensity laser beams, the speed that the temperature of a material surface rises to the boiling temperature is fast so as to avoid the fusion caused by heat conduction; the cut materials are ignited by irradiation of the laser beams so as to perform a fierce chemical reaction with the oxygen to generate a larger heat source; a part of materials is vaporized into steam and disappears, and a part of materials is sucked back by auxiliary airflows from the bottom of a cutting slot as ejecta; the cutting slot cut by lasers is thin, the cutting surface is smooth, the cutting speed is fast, the thermal deformation is small, the laser cutting is in no contact with the material surface, the cutting machine is suitable for processing large-sized products, the materials are saved, moreover, the cutting machine can be applied to sheet-metal processing of relevant industries such as heavy and light industries, medical industries and the like, cutting and shaping of rotators, stators and blades, manufacturing of various chains and parts of vehicular manufacturing industry, advertisement decoration and handicraft article manufacturing industries, etc.

The invention discloses a preparation method of an aramid fiber ultrafiltration membrane. The preparation method includes the following steps: at least one organic solvent, at least one additive and an aramid fiber solution are provided, after the organic solvent, the additives and the aramid fiber solution are mixed and dissolved, defoaming is carried out under a vacuum condition to prepare a membrane casting solution; the membrane casting solution and braided pipes or reinforcing fibers are sprayed through a nozzle, and an ejecta is immersed in immersion liquid and gel liquid in order to solidify the ejecta into membrane filaments; and the membrane filaments are rinsed, the additives and the solvent are removed, and then the aramid fiber ultrafiltration membrane is obtained. The invention also provides the aramid fiber ultrafiltration membrane prepared by the method. The aramid fiber ultrafiltration membrane of the invention can be effectively improved in the tensile and compressivestrength of the membrane, improved in the spinnability in the process of membrane preparation and greatly improved in membrane flux.

The invention provides an auxiliary air laser oxidizing fusion cutting machine of a compressor. The cutting machine is characterized in that oxygen or other active gases are adopted to replace inert gases to perform fusion cutting, and auxiliary airs are adopt strong airflows produced by a compressor, and the speed that the temperature of a material surface rises to the boiling temperature is fast so as to avoid the fusion caused by heat conduction under heating of high-power intensity laser beams; the cut materials are ignited by irradiation of the laser beams so as to perform a fierce chemical reaction with the oxygen to generate a larger heat source; a part of materials is vaporized into steam and disappears, and a part of materials is sucked back by auxiliary airflows from the bottom of a cutting slot as ejecta; the cutting slot cut by lasers is thin, the cutting surface is smooth, the cutting speed is fast, the thermal deformation is small, the laser cutting is in no contact with the material surface, the cutting machine is suitable for processing bulky commodities and the materials are saved, moreover, the cutting machine can be applied to sheet-metal processing of relevant industries such as heavy and light industries, medical industries and the like, cutting and shaping of rotators, stators and blades, manufacturing of various chains and parts of vehicular manufacturing industry, advertisement decoration and handicraft article manufacturing industries, etc.

The invention provides an electronically controlled laser oxidizing fusion cutting machine with auxiliary gases. The cutting machine is characterized in that a control unit adopts alternating current to load electricity to realize the functions of connecting, identifying and controlling load electrical appliances; oxygen or other active gases are adopted to carry out fusion cutting instead of the inert gases; the auxiliary gases adopt blast air manufactured by a compressor; the materials are heated by high power and density laser beams so that the speed at which the surface temperature of the materials rises to the boiling temperature is high enough to avoid melting caused by heat conduction; the cut materials are ignited under irradiation of the laser beams and carry out drastic chemical reaction with oxygen to generate more heat sources; and a part of materials are vaporized into vapor and disappear, and the other part of materials used as ejecta are absorbed back by the auxiliary gas flow from the bottoms of cutting joints. The cutting machine has the following beneficial effects: the laser cutting joints are fine; the laser cutting surface is smooth; the laser cutting speed is high; the heat distortion is slight; laser cutting can avoid contact with the surfaces of the materials; and the cutting machine is suitable for processing of large products, saves materials, and is applied to sheet metal processing in relevant industries such as heavy industry, light industry, medical treatment industry and the like, cutting forming of rotors, stators and blades, manufacturing of various chains and parts in the automobile industry, advertisement decoration, handicraft manufacturing and the like.