393results about How to "Improve blending effect" patented technology

The invention relates to a preparation method of a polyvinylidene fluoride (PVDF)-based thin film. According to the thin film forming process, through an extrusion casting and drawing method, PVDF, polymethyl methacrylate (PMMA), a rubber elastomer, titanium dioxide as well as other auxiliaries and fillers are mixed according to a certain ratio and are melted and extruded at certain temperature, and then the PVDF-based thin film is formed under guiding and stretching effects of casting traction equipment. The PVDF-based thin film prepared by the invention is uniform and easily controllable in thickness, good in barrier property as well as excellent in mechanical property and environmental aging resistance, and is easy to realize industrialization; the PVDF-based thin film, through modification treatment, is significantly improved in surface caking property and guarantees good adhesion with a solar cell packaging material; the thin film brings high convenience for assembly of a solar cell backboard film and is compact in structure; and the thin film has good application prospect in solar cell industry.

The invention discloses a conductive PC / ABS composite material and its preparation method. The composite material provided by the invention comprises the following components of: by weight, 50-70% of polycarbonate resin; 10-30% of ABS resin; 8-20% of conductive carbon black; 2-5% of a compatilizer; and 3-6% of a flexibilizer. According to the prepared conductive PC / ABS composite material, the ABSresin and the flexibilizer react with the polycarbonate resin, thus raising the toughness of the conductive PC / ABS composite material and enhancing the shock resistance of the resin added with a conductive filling material; in addition, the compatilizer is used to raise the blending effect of the polycarbonate resin and the ABS resin during processing, stabilize the microstructure of the conductive PC / ABS composite material and improve the comprehensive performance of the material.

The invention relates to a novel method for storing and brewing white spirit and aims to solve the defects that currently the storage of the white spirit at home and abroad adopts a mode that after being stored for a certain period, the white spirit of the original grade is subjected to design, alcohol content reduction, combination, seasoning, adsorption, filter and then is subjected to filling production; in the natural storage condition, the stimulating components and hazardous components in the white spirit cannot sufficiently react and volatilize; the stability of the association of the white spirit body is not good; the vinosity of the produced white spirit is lack of soft taste and clean aftertaste; and the quality of the produced white spirit is not stable. In the novel method for storing and brewing the white spirit of the invention, the double cellaring, namely the secondary ageing process is adopted, and according to the substrate concentration, the non-homogeneous substance motion characteristics and the permutation and combination principle, primitive base wine generated by carrying out solid-state fermentation and distillation in a mud cellar is subjected to twice physical and chemical changes, ageing, alcoholizing and bouquet spreading, and processing in a conventional wine storage container under a specific environment to generate the natural, hygiene and health white spirit.

The invention discloses a rubber composition for a tire side of an all-steel giant project tire and an all-steel giant project tire using the composition. The rubber composition for the tire side comprises the following components: (a) 100 parts by weight of rubber component and (b) 40-70 parts by weight of reinforcing black carbon according to 100 parts by weight of (a), wherein the rubber component also comprises 10-50 parts by weight of butyl chloride rubber and the balance of natural rubber or the composition of cis-butadiene rubber and / or styrene-butadiene rubber and the natural rubber. The composition can be also matched with common rubber composition compounding agent. The tire side designed and manufactured according to the prescription has favorable resistance of ozone, thermo-oxidative ageing, yield cracking and crack increase, and the tire side glue has the hardness of 50 Chore A-62 Chore A, the tensile strength of 15 MPa-25 MPa and the yield cracking grade small than or equal to 6 grades / 300,000 times.

The embodiment of the invention discloses a virtual resource transfer method and device, a server, and a storage medium. According to the embodiment of the invention, the method comprises the steps: obtaining virtual resource transfer information in a transaction system in a preset historical section; analyzing the processing effect of each transfer channel in the transaction system according to the virtual resource transfer information to obtain reference data; analyzing the virtual resource transfer information according to a preset dimension to obtain analyzed data; training a preset channel estimation model according to the reference data and the analyzed data, and determining a transfer channel in the transaction system in a future preset section based on a trained evaluation model, so as to achieve the transfer of the virtual resources in the future preset section. The method can adaptively select the transfer channel, improves the flexibility and processing efficiency, can improve the channel deployment effect, and achieves the optimization use of resources.

The invention provides a foaming material for shoes. The foaming material comprises the following components in parts by weight: 20-30 parts of ethylene-vinyl acetate copolymer, 20-30 parts of polyethylene, 15-25 parts of polyolefin elastomer, 1-10 parts of filler, 2-5 parts of foaming agent and 0.1-0.5 part of cross-linking agent. The foaming material for the shoes, which is provided by the invention, has the characteristics of high elasticity, wear resistance, sterilization, deodorization and environment friendliness and leftover materials can be recycled.

The invention discloses a design method of a fuel injection system for a scramjet engine and relates to a near space vehicle. Nozzles can be distributed in the following three ways: according to flowing characteristics, the nozzles are distributed on a near vortex wall surface circumferentially, or distributed along the flowing direction, or distributed in a 'triangle' shape on the near vortex wall surface. In the component design of the existing scramjet engine, the defect that the outlet uniformity needs to be controlled as much as possible in the design of a gas inlet channel, while a non-uniform vortex structure needs to be artificially introduced in the design of a combustion chamber, is solved. By virtue of a low-energy / low-velocity zone and a corner vortex structure of the outlet of a three-dimensional internal-retraction gas inlet channel, the nozzles of a combustion chamber are reasonably arranged, the relation of flowing characteristics between the gas inlet channel and a supersonic combustion chamber is strengthened, and the fuel injection and mixing effects can be enhanced, so that the combustion efficiency is raised indirectly, and the overall performance of the scramjet engine is improved.

The invention discloses a wide-range working rocket stamping combined full flow channel comprising an air inlet channel inner compression section, a combustion chamber and a tail spraying pipe which are sequentially connected from front to back. The combustion chamber comprises a supersonic combustion chamber section and a subsonic combustion chamber section from front to back; the supersonic combustion chamber section is divided into three independent flow channel bodies in the longitudinal direction of the supersonic combustion chamber section; and the flow channel bodies all communicate with the subsonic combustion chamber section. The front ends of the flow channel bodies are the air inlet ends, and three independent air inlets are formed correspondingly; the three independent flow channel bodies are formed by enclosing of two central supporting plates arranged in the supersonic combustion chamber section in a spaced mode and the two side walls of the supersonic combustion chamber section; the rear ends of the central supporting plates are provided with a plurality of rocket ejecting spraying pipe mounting holes communicating with cavities; the interiors of the central supporting plates are the hollow cavities used for communicating with a fuel storage tank; and a plurality of fuel nozzles communicating with the cavities are formed in the two side faces of the central supporting plates from front to back at intervals. The wide-range working rocket stamping combined full flow channel multimode flow channel capable of being shared is high in flow channel extensibility and simple in structure changing style.

The invention discloses a rotational flow stress application / stamping combustion chamber and belongs to the technical field of rotational flow combustion of new concept aero-engines. In the structureof the combustion chamber, a diffuser carries out speed reduction and pressurization on airflow; a thermal insulating screen divides the incoming flow of a diffuser pipe into a main airflow and an outer duct airflow for cooling; a plurality of cooling holes are formed in the thermal insulating screen; a flame stabilizer transmits and stabilizes flame; a rotational flow blade is positioned in the flame stabilizer and forms a set included angle with the main airflow to rotate the downstream airflow; and an oil supply system comprises on-duty level oil supply, outer ring oil supply of a radial stabilizer and main combustion level oil supply and adopts the oil supply manners of combination of a direct-injection type fuel spray nozzle and an annular oil pipe, and a radial oil pipe of a main oilpipe. Compared with a traditional combustor, as the rotational flow combustion manner is adopted, the flame propagation velocity is not affected by pressure; in addition, the subregion oil supply manner is adopted, so that the oil and gas are mixed more fully, combustion is more efficient and stable, and pollution is less; and moreover, the flame transferring device of the flame stabilizer is eliminated, so that the structure of the combustion chamber is simplified, the length of the combustion chamber is shortened and the weight of the combustion chamber is reduced.

The invention relates to a thermal protection method of a porous medium jetting support plate leading edge nose cone. The thermal protection method comprises the following steps that firstly, a narrow seam is formed in the jetting support plate leading edge nose cone, a front cavity of a jetting support plate is communicated with one fuel pipe, and a back cavity of the jetting support plate is communicated with the other fuel pipe; secondly, most of low-temperature fuel is quickly sprayed out of the narrow seam through the fuel pipe arranged at the front cavity, and the rest part of fuel permeates to the surface of the front cavity in a sweating mode; thirdly, the fuel sprayed to the leading edge is collected through the narrow seam, and produced detached shock waves are pushed away from the leading edge nose cone; fourthly, a thick protection air film is formed at the leading edge nose cone through the fuel sprayed out of the narrow seam and under the action of high-speed main stream, the thick protection air film is fused with a compact air film formed on the surface of the jetting support plate in a sweating and cooling mode, and thermal protection for the jetting support plate is enhanced. According to the thermal protection method, due to the fact that the fuel is sprayed to the high-speed main stream through the narrow seam at the leading edge nose cone, the low-temperature fuel serves as coolant for reducing the temperature of the leading edge nose cone when sprayed out of the narrow seam, meanwhile the sprayed fuel can form the protection air film on the surface of the jetting support plate, and the protection air film can conduct effective thermal protection on the jetting support plate.

The invention relates to a low-floating-fiber glass fiber reinforced polypropylene material and a preparation method thereof. The low-floating-fiber glass fiber reinforced polypropylene material is prepared from, by weight, 100 parts of polypropylene resin, 15-30 parts of high-melt-strength polypropylene, 10-50 parts of glass fiber, 1-3 parts of a compatilizer, 5-15 parts of an ethylene-propylene segmented copolymer and 1-2 parts of other auxiliaries. According to the preparation method of the low-floating-fiber glass fiber reinforced polypropylene material, screw extrusion processing is adopted, and the screw combination design principle is adopted, wherein the first region and the second region are only composed of conveying components, the third, fourth, fifth, sixth and seventh regions comprise shearing components, the eighth, ninth and tenth regions are composed of conveying components, and the extrusion temperature is 165-230 DEG C. According to the low-floating-fiber glass fiber reinforced polypropylene material, the mechanical property is excellent, and the surface of the obtained low-floating-fiber glass fiber reinforced polypropylene material is smooth, clean and free of floating fiber.

The invention provides a wireless-based online movement positioning method and a wireless-based online movement positioning system in a transformer substation. The system comprises a station level server, a station level data communication gateway, a wireless AP (access point), a wireless datum point, a handheld mobile terminal and a mobile positioning and early warning node. Locations of workers in the transformer substation can be accurately positioned spatially by a space positioning method, a sampling and speed-measuring method and an average value algorithm, the positioning precision is high, and safety and reliability are also high; the handheld mobile terminal is used in a mobile positioning wireless network, the working tracks and the locations of users of the handheld mobile terminals can be monitored conveniently by monitoring personnel, and the workers can conveniently record routing inspection on detecting equipment in the transformer substation; and the wireless AP and the wireless datum node are low in power consumption and small in size and can be matched with the original equipment of the transformer substation well. The wireless-based online movement positioning system has the advantages of low cost, easiness in installation and long maintenance period.

The invention discloses a quantitative blending device of lubricating oil. The quantitative blending device comprises a stirring kettle, wherein feeding pipes are arranged at two sides of the top of the stirring kettle; first solenoid valves are arranged on two groups of the feeding pipes; flow meters, which are mounted on the feeding pipes, are arranged at one side close to the stirring kettle of the first solenoid valves; a discharging pipe is arranged at the center of one end, far away from the feeding pipes, of a reaction kettle; the discharging pipe is provided with a second solenoid valve; a first stirring shaft and a second stirring shaft are arranged in the reaction kettle in parallel; first heating tubes are arranged in the first stirring shaft and the second stirring shaft; spiral stirring blades are uniformly arranged on the outer sides of the first stirring shaft and the second stirring shaft. The quantitative blending device of the lubricating oil has a simple structure; quantitative feeding can be carried out on the reaction kettle through the flow meters and the solenoid valves; meanwhile, the temperature in the reaction kettle is uniform and keeps a suitable stirring temperature range all the time; the stirring is sufficient and the blending effect is good; the working efficiency and quality of blending the lubricating oil are improved.

The invention provides a nano silicon dioxide with grafting of polyisoprene on the surface, a preparation method and an application thereof. The preparation method comprises the steps of dispersing the nano silicon dioxide in a solvent, then adding an RAFT (Reversible Addition Fragmentation chain Transfer) reagent with carboxyl groups, a dewatering agent and a catalyst for reaction to obtain nano silicon dioxide capable of initiating RAFT polymerization of isoprene monomers; then mixing with the isoprene monomers for reaction to obtain the nano silicon dioxide with grafting of the polyisoprene on the surface. The nano silicon dioxide particles can improve the blending effect of different rubbers or the rubbers and plastic molecules in a more-effective manner by utilizing the compatibility of the grafted polyisoprene and a base material so as to provide a better basis for exerting the synergistic property of different components in a more-effective manner.

The invention discloses ultrahigh molecular weight polyethylene short fiber and a preparation method thereof. The preparation method includes: preparing protofilament of the ultrahigh molecular weight polyethylene short fiber, subjecting the protofilament to assembly winding and bundling, and cleaning oil on the protofilament; applying anionic high-strength polyethylene short fiber oil, performing cold crimping, and loosening and setting the crimped fiber at 80-120 DEG C, wherein drying time is 5-30min, and drying thermosetting temperature is 90-100 DEG C; adjusting tension, and cutting to obtain ultrahigh molecular weight polyethylene short fiber of 3-10 / 25mm in crimp number, wherein cutting length is 3-102mm. The section of the ultrahigh molecular weight polyethylene short fiber is special-shaped, the short fiber has certain natural crimping characteristic and is easy to comb and glue, and cohesion, spinnability and blending performance of the short fiber are improved; fiber number of the short fiber is 0.5-2.5dtex, cutting length is 3-102mm, and strength is 10-40cN / dtex, so that requirements on different styles of subsequent spinning processes can be met.

The present invention provides a silica-alumina composite sol having excellent transparency, film-forming property and water resistance, which comprises a composite colloid particle comprising a colloidal silica particle coated with a fine colloidal alumina hydrate particle and a colloidal alumina hydrate particle having a major axis diameter 10-fold or more greater than the diameter of a primary particle of the colloidal silica particle bound to each other; and a process for producing the silica-alumina composite sol. Disclosed is a silica-alumina composite sol which comprises a composite colloid particle comprising a colloidal silica particle coated with a fine colloidal alumina hydrate particle and a colloidal alumina hydrate particle bound to each other, wherein the colloidal alumina hydrate particle has a major axis diameter 10-fold or more greater than the diameter of a primary particle of the colloidal silica particle and a minor axis diameter of 2 to 10 nm. Also disclosed is a process for producing the silica-alumina composite sol.

According to the hydrogen premixing efficient low-emission combustion chamber head, the characteristic that hydrogen premixing flames are high in propagation speed and the advantage that the hydrogen flames are thin are combined, the low-emission combustion chamber stable-combustion head structure is designed, the structural design that the multiple stages of fuel annular cavities are connected with the annular cavities is adopted, and the combustion efficiency is improved; the multi-stage premixing flow channel is arranged in the combustor head, the uniformity of fuel entering the combustor head can be greatly improved, the multi-stage premixing flow channel is gradually shrunk, the spiral grooves are formed in the premixing flow channel, mixing of the fuel and air is enhanced, the combustion temperature field is improved, reliable and stable combustion of hydrogen under the premixing condition is achieved, and therefore emission of nitric oxide in the hydrogen combustion process is reduced, and the combustion efficiency is improved. And clean and efficient hydrogen combustion is realized. The scheme has the advantages of light and handy structure, high space utilization rate, high volume heat intensity, low pollutant emission, uniform outlet temperature, good universality, simplicity in processing and maintenance and the like.

The invention discloses a polylactic-starch epispastic material and preparing method, which comprises the following steps: melting the polylactic and starch; mixing up with sparkle to form foam article with water resisting property and high frothing percentage. The invention can reduce the retrogradation of the polylactic, which improves the frothing percentage of the polylactic-starch.

The invention provides a production method for cashmere / yakwool covering yarns. Cashmere and yakwool fibers are respectively used to weave rough yarns in a wool spinning system. A parallel spinning method is used to weave yakwool / vinylon fascinated yarns by using yakwool rough yarns and vinylon filaments, and then the yakwool / vinylon fascinated yarns are used as core yarns, and the cashmere rough yarns are used as wrapping yarns to weave the covering yarns, and finally, a vinylon dissolution technology is used to remove vinylon, to obtain excellent quality cashmere / yakwool covering yarns. Using the above technology, the cashmere fibers and yakwool fibers can be made into excellent quality covering yarns in high additional value. Especially in the first step and the second step, the yakwool fibers and the cashmere fibers respectively weave rough yarns on a wool spinning system, thereby reducing damages on fibers. In the third step, the parallel spinning method is used to weave the yakwool / vinylon fascinated yarns, thereby improving fluffiness and strength of the yarns. Using the production method, the yakwool just needs to be processed in rough yarns, and the method prevents a procedure in which processing of the yakwool is relatively difficult.

The invention relates to a color matching device and particularly relates to a color matching device for producing and printing a medicine package. Aiming at solving the technical problems, the invention provides the color matching device for producing and printing the medicine package, which has an excellent matching effect, saves time and labor and has high working efficiency. In order to solve the technical problems, the color matching device for producing and printing the medicine package, provided by the invention, comprises a bottom plate, first supporting rods, a collection box, a first discharging pipe, a first valve, a second supporting rod, a cylinder body, a second discharging pipe, a first check valve, a feeding pipe and the like; first supporting rods are symmetrically welded left and right on tops of the bottom plate; the collection box is welded at the tops of the first supporting rods; the first discharging pipe is welded at the lower part of the left side of the collection box; and the first valve is arranged on the first discharging pipe. According to the color matching device for producing and printing the medicine package, a left-right movement device moves leftward and rightward and a pigment is matched; and the blended pigment is stirred and mixed through a stirring device and the working efficiency is improved.

The invention provides an adjustable nozzle comprising an inner cylinder, an outer cylinder, an outer cylinder sleeve and N layers of outer wave structures clamped between the inner cylinder and the outer cylinder; the outer wave structures are radially arranged in sequence along the periphery; gas channels are formed between adjacent outer wave structures, and between the outer wave structures and the inner and outer cylinders; the outer cylinder sleeve is sleeved outside the outer cylinder, and can axially move along the cylinder shaft, thus switching work modes and adjusting flame positions.

The invention discloses a logistics system and method, which relate to the field of express logistics. The logistics system includes a delivery terminal connected to a server, a client terminal, a transfer station, an express terminal, and an express cabinet terminal; The unique identification code corresponding to the express is put into the delivery terminal together with the express; the transfer station collects the express in the delivery terminal and completes the security check and destination classification at the end of delivery when the sender searches through the client terminal, and runs The courier terminal at the destination of the courier completes the delivery of the courier. This logistics system and method eliminates the need to fill in the form by hand, and does not require the courier to pick up the package one by one and scan the information, fast and automatic classification, low error rate, and high efficiency.

The invention discloses a preparation method and a preparation mold of an all-solid lithium-sulfur battery. The method of the invention includes the following steps: step a, preparing a solid electrolyte: carrying out high-energy ball milling, high-pressure tabletting and high-temperature sintering on Li2S, P2S5, nano silicon and LiF to prepare a sulfide glass ceramic solid electrolyte; step b, preparing a positive electrode material: carrying out high-temperature heat treatment and multiple times of high-energy ball milling processes on S, active substances and the solid electrolyte preparedin the step a to prepare the positive electrode material; step c, preparing a negative electrode material: carrying out surface treatment on metal lithium sheets to prepare the negative electrode material; and step d, placing the prepared positive electrode material, solid electrolyte and negative electrode material into an all-solid lithium-sulfur battery mold, and adopting a lamination method toprepare the all-solid lithium-sulfur battery. According to the scheme of the invention, the solid electrolyte is used to replace an electrolyte solution, so that a lithium-ion battery is safer, and the solid electrolyte has a good inhibition effect on lithium dendrites, and can also inhibit the shuttle effect and the dissolution of the active substances.

The invention discloses a direct-current cold-wall type engine combustor. The direct-current cold-wall type engine combustor comprises a combustor upper cover, a combustor linear section, a jet section and a spray pipe convergence and expansion section which are connected in sequence. An oxidizing agent liquid collection cavity, an oxidizing agent jet hole, a fuel liquid collection cavity and a fuel jet hole are formed in the outer wall of the jet section in the circumferential direction. An oxidizing agent enters the oxidizing agent liquid collection cavity via an oxidizing agent regenerativecooling channel and then flows out from the oxidizing agent jet hole to form a jet flow, fuel enters the fuel liquid collection cavity via a fuel regenerative cooling channel and then flows out fromthe fuel jet hole to form a jet flow, the jet flows are close to the inner wall of the combustor linear section but being not in contact with the wall, and the jet flows impact for atomization, mixingand combustion on the combustor upper cover, and are discharged out of the combustor through the spray pipe convergence and expansion section. By means of the combustor, the propellant combustion efficiency and the thermal protection capacity of the combustor can be improved, and the combustor is simple in overall structure and easy to machine and obtain.

The invention provides an augmented reality AR special effect control method, device and equipment. The method comprises the steps: determining a first action label corresponding to a first action ofa target user according to a real scene image comprising the target user; then, based on the first action label, determining an AR display special effect of a second action performed by a virtual object, the second action performed by the virtual object being used for responding to the first action of the target user; and generating an AR scene picture based on the determined AR display special effect and the real scene image, and controlling AR equipment to display the AR scene picture. Method, the AR special effect control device can generate an AR display special effect that the virtual object responds to the first action of the target user through the second action. And an AR scene picture is generated based on the AR display special effect and the real scene image, so that the AR scene picture achieves the effects of group photo taking of the target user and the virtual object and action matching interaction.

The invention discloses a multifunctional liquid medicine fertilizer and a preparation method and application thereof, and the multifunctional liquid medicine fertilizer comprises the following components by weight: 10-30 parts of urea, 1-20 parts of ammonium dihydrogen phosphate, 1-10 parts of potassium dihydrogen phosphate, 1-12 parts of potassium nitrate, 1-5 parts of potassium sulfate, 1-10 parts of potassium chloride, 1-5 parts of cytex, 1-5 parts of fulvic acid potassium, 1-5 parts of chitosan oligosaccharide, 0.1-5 parts of chlorantraniliprole, 1-30 parts of hymexazol, 1-10 parts of a surfactant, 1-5 parts of other additives and 60-90 parts of water. The multifunctional liquid medicine fertilizer is a multifunctional medicine fertilizer product prepared by compounding of fertilizers, the cytex, fulvic acid, the chitosan oligosaccharide and other biostimulant substances, and high-efficiency wide-spectrum low-toxicity pesticide chlorantraniliprole and fungicide hymexazol, can provide crops nutrition, also can prevent crop diseases and insect pests, and is convenient to use, time-saving and labor-saving; the cytex, the fulvic acid and the chitosan oligosaccharide can effectively improve crop resistance, can improve pesticide efficacy, reduces pesticide use amount, and improves agricultural production yield, quality and safety.

The invention relates to a ramjet combustion chamber, and provides a ramjet combustion chamber stabilizer and a flame stabilization method. The problems that existing mechanical flame stabilizers havelarge pneumatic loss and narrow flame stabilization range, and consequently the working reliability is low, and the requirement of efficient flame stabilization under the high Mach number cannot be met are solved. The ramjet combustion chamber stabilizer includes a sweepback arc-shaped supporting plate, the sweepback arc-shaped supporting plate includes a bottom face, two end faces and two side profiles, the cross section of the sweepback arc-shaped supporting plate is triangle-like, the front parts of the two side profiles are connected, and the two side profiles are concaved to form an arcside profile.

The invention discloses an oxygen-complementing type air-hydrogen / air-oxygen pneumatic resonance heat surface igniter, which consists of a hydrogen joint, an oxygen joint, a nozzle, a sealing gasket, a mixing cup, an ignition chamber, a resonance tube joint, a resonance tube adjusting gasket, a resonance tube and an air joint, wherein the mixing cup is positioned between the nozzle and the ignition chamber, and is annularly distributed with air vents; the resonance tube joint is positioned on the lateral surface of the igniter, and a welding position of the resonance tube joint is positioned at the downstream of the air vents of the mixing cup; the resonance tube extends into the ignition chamber through the resonance tube joint, and is fixed by threads between the air joint and the resonance tube joint; and the depth in which the resonance tube extends into the ignition chamber can be adjusted by the resonance tube adjusting gasket, and the sealing is realized by the resonance tube adjusting gasket. The igniter is characterized in that: the tail of the ignition chamber is provided with an oxygen-complementing nozzle; an oxygen-complementing hole for jetting to the downstream is drilled at a position which is on the side wall in the ignition chamber and corresponds to the center of a flow field, wherein the diameter d of the oxygen-complementing hole is between 1 and 3mm when an oxygen-complementing flow rate is between 3 and 10g / s.

The invention discloses a wollastonite enhanced polycarbonate material and a preparation method thereof. The wollastonite enhanced polycarbonate material comprises the following formula components in percentage by weight: 70-90% of polycarbonate resin, 5-20% of wollastonite, 3-6% of flexibilizer and 1-3% of wollastonite surface activator. The wollastonite enhanced polycarbonate material has good notch resistance performance and wear-resisting property, stable size, smooth and flat surface and comprehensive physical properties because all components within a proper range mutually act in the extrusion process. The preparation method of the wollastonite enhanced polycarbonate material is characterized in that extrusion and granulation are finished in one step by mixing reaction. The preparation method has the advantages of simple technology, high benefit and low cost, is convenient to operate and is suitable for industrial production.

The invention relates to a thrust chamber injector, in particular to a liquid oxygen methane thrust chamber injector, and aims to solve the problems that in the working process of an existing liquid oxygen methane injector, both liquid oxygen and methane belong to liquid low-temperature propellants, a direct-current shear type nozzle or an impact type injector structure is adopted and consequently the propellant mixing effect of the thrust chamber injector is poor, and the combustion efficiency is insufficient. The liquid oxygen methane thrust chamber injector comprises a plurality of injection units, a middle bottom, a top cover, a fluid director and an inner bottom, wherein the top cover, the fluid director and the inner bottom are coaxially and sequentially arranged on the middle bottom. The multiple injection units are fixed to the middle bottom, the fluid director and the inner bottom; a liquid oxygen cavity is formed among the top cover, the middle bottom and the multiple injection units, and a methane cavity is formed among the middle bottom, the inner bottom and the multiple injection units; and the multiple injection units are provided with nozzles with retraction chambers, and the nozzles comprise a central area nozzle, a main combustion area nozzle and an edge area nozzle.