30results about How to "Improve energy characteristics" patented technology

The invention relates to an embeddable two-stage axial flow blood pump rotor structure. The embeddable two-stage axial flow blood pump rotor structure comprises a rotor head part, a rotor tail part and an impeller part, wherein the impeller part which adopts a two-stage structure design comprises a front-stage impeller and a back-stage impeller; the front-stage impeller (2) in a spiral structure has three blades; the back-stage impeller (3) is in a traditional axial flow structure; an axial distance is arranged between the front-stage impeller and the back-stage impeller; the surface curve equation of the heat part of the rotor is as follows: Formula, wherein the x is an axial distance of a hub; the y is a radial distance of the hub; and the original point is an intersection point of the surface curve of the head part of the rotor and the axial line of the hub. The embeddable two-stage axial flow blood pump rotor structure can enable the blood pump rotor to satisfy with a lift requirement at a relatively low rotating speed under the precondition that the axial size is as small as possible, thereby decreasing formation of hemolysis and reducing power consumption efficiently, and can reduce irregular flow resulted from the more complex blood pump rotor structure as the transition between the front and back impellers is corrected.

A shock absorbing material comprising an Al-Mg-Si series aluminum alloy having high strength and showing excellent energy absorbing property when compressed in the axial direction of extrusion is obtained. The shock absorbing material of the invention has a hollow cross section, mainly comprises a fibrous structure and can be manufactured by press quenching just after extrusion followed by aging. In the press quenching, press quenching under air-cooling advantageous in view of the dimensional accuracy or the cost can be adopted. Further, the shock absorbing material of the invention has excellent cracking resistance to a compressive load in the lateral direction as well as in the axial direction. The shock absorbing material of the invention is suitable as side members or bumper stays in the frame structures of automobiles.

Provided are an energy storage device including an electrode in which lithium is introduced into a silicon layer and a method for manufacturing the energy storage device. A silicon layer is formed over a current collector, a solution including lithium is applied on the silicon layer, and heat treatment is performed thereon; thus, at least lithium can be introduced into the silicon layer. By using the solution including lithium, even when the silicon layer includes a plurality of silicon microparticles, the solution including lithium can enter a space between the microparticles and lithium can be introduced into the silicon microparticles which are in contact with the solution including lithium. Moreover, even when the silicon layer is a thin silicon film or includes a plurality of whiskers or whisker groups, the solution can be uniformly applied; accordingly, lithium can be included in silicon easily.

The invention relates to a pouring-type high-energy insensitive explosive and a preparation method thereof. In order to solve the problem of a low energy level of traditional butylated hydroxy castingPBX explosives, an energy-containing adhesive and an energy-containing plasticizer are introduced as a binder system, and through addition of high-energy explosives and metal fuel components, the prepared pouring-type PBX explosive has high energy characteristics; the explosive formula has a density greater than 1.85 g / cm<3>, the detonation velocity is greater than 7800 m / s, and the explosive power is that of 1.9 times or above the TNT equivalent; and at the same time, the explosive formula has good low-vulnerability, and especially has mild reactions in slow-speed burning tests, and the reaction level does not exceed a detonation level.

A flexor (1) for use in a ski binding (2) or mounting plate (3) for a cross country or touring ski (4) is described. This comprises: an extending flexor arm (10) and a holding and positioning portion (20), wherein the extending flexor arm (10) is connectable to, or integral with, the holding and positioning portion (20) such that the extending flexor arm (10) can rotate and / or displace with respect to the holding and positioning portion (20) around the point of connection (21) between the two. The extending flexor arm (10) is formed such that the amount of displacement of the extending flexor arm (10) as a result of an applied force (N) acting thereon follows a substantially linear relationship (30), up to a first desired amount of displacement (31). For a displacement of the extending flexor arm (10) greater than the first desired amount of displacement (31), the amount of displacement of the extending flexor arm (10) as a result of an applied force (N) acting thereon follows an approximately exponential relationship (32).

The present invention relates to a metal hydride polymer in-situ polymerization coating modification method, dicyclopentadiene (DCPD) and the like are used as polymer reactive monomers for formation of a poly dicyclopentadiene(DCPD) homopolymer or copolymer coating layer on metal hydride surface by in-situ polymerization, and metal hydride isolation protection can be achieved. The method has the characteristics of rapid response and coating layer stability, good role in isolation and protection can be played, a modified metal hydride can maintain excellent energy characteristics, and a good and stable performance product is provided for metal hydride application of in many fields.

The invention relates to a double-impeller serial pump with cone-shaped hubs. The double-impeller serial pump comprises hubs, a primary impeller, a secondary impeller and a guide vane. The primary impeller, the secondary impeller and the guide vane are sequentially arranged on the hubs. No guide vane is arranged between the primary impeller and the secondary impeller. The hubs are cone-shaped hubs varied in hub ratio, the primary impeller is a non-adjustable impeller, and the secondary impeller is an adjustable impeller. Due to the adoption of serial arrangement, the size and the weight of a water spray push system are reduced. As the cone-shaped hubs varied in hub ratio are used and loadings on the two impellers are optimized and matched, the energy characteristic of the pump is improved and the cavitation performance of the pump is boosted. The pump has the advantages of large flow, compact structure, small space dimension, excellent energy characteristic, good anti-cavitation performance and the like.

The invention discloses a phase change type paraffin-containing fuel ramjet engine, which adopts an integrated design of a combustion chamber and a gasification chamber, and is compact in structure and high in energy utilization rate. A shell is heated by a large amount of heat released by combustion reaction in the combustion chamber, the surface of paraffin-containing fuel can be preheated under the action of radiation and heat convection, and meanwhile, ram air is heated, so that the surface of the fuel has higher temperature, and phase change of the fuel is facilitated. Mode conversion is easy to achieve, and automatic switching between a boosting section and a ramming section can be completed through change of pressure intensity. The head of the combustion chamber is provided with a conical hole with a certain inclination, so that the rotational flow of gas can be realized, and higher combustion efficiency can be further obtained. When the boosting section and the ramming section are switched, a mixture of a phase change product and air generates rotational flow under the action of the conical hole when flowing into the combustion chamber, so that the mixing effect is good. The engine is adjustable in size, wide in application range, and suitable for power systems of supersonic aircrafts.

The invention relates to a three-element solid-liquid propellant rock protection system for vehicles and provides a three-element solid-liquid propellant rocket protection system for vehicles, having a protection function. The system comprises an injector 1, a combustion chamber 2, a control system 3, a supply system 4, an injection pipe 5, a storage tank 6 and a parachute 7. The system is characterized in that the combustion chamber 2 is connected with the storage tank 6 through the injector 1, the combustion chamber 2 is filled with solid fuel, the control system 3 is connected with a vehicle cab control system and is connected with the supply system through a wire, and the storage tank 6 contains liquid antioxidant and liquid hydrogen. The system having the protection function has the advantages that front end and rear end collisions of vehicles can be avoided.

The invention provides a coal-fired combustion improver with high stability. The coal-fired combustion improver is innovatively characterized by comprising the following components in percentage by weight: 20-30% of an oxidizing agent, 2-8% of a stabilizer, 20-30% of a catalyst, 2-3% of a dispersing agent, 10-20% of an emulsifier and 10-20% of a penetrating agent, wherein the stabilizer comprises 3,5-ditert-butyl-4-hydroxybenzoyl hydrazine, xylogen, silica powder, sodium sulfanilate and zinc stearate, or 3-methyl-5-tert-butyl-4-hydroxybenzoyl hydrazine, xylogen, silica powder, sodium sulfanilate and zinc stearate. According to the coal-fired combustion improver disclosed by the invention, the effect of adding the stabilizer into the coal is to mainly achieve the effects of delaying the decomposition rate after the oxidizing agent is heated and increasing the action time in the combustion system, and then the actual combustion effect is improved.

The present invention discloses slight smoke type tricolor fireworks powder particles and application. The fireworks powder particles are obtained by the following steps: dissolving nitrocotton and a smokeless powder with the nitrocotton at first; emulsifying, foaming and prilling; then removing a solvent and separating materials; and finally drying to obtaining the fireworks powder particles. The obtained particles are mixed according to the relative mass ratio of (1-8): (1-8): (1-8) to obtain colorful fireworks powder. According to the slight smoke type tricolor fireworks powder particles and the application provided by the present invention, a color addition principle is utilized; the slight smoke type tricolor fireworks powder particles are mixed to match colors; the circumstance that a formula is designed independently according to various colors can be avoided; and only three basic powder particles are required to be produced. The three raw material powders are combined to achieve the colorful effect, the preparation process can be simplified, the product quality is stabilized, the production efficiency is greatly improved, and the production links are simplified.

The invention discloses a PGN-based thermoplastic polyurethane elastomer containing Diels-Alder bonds and a one-pot preparation method thereof. The invention aims to solve the problem that polyurethane elastomer is difficult to repair after cracking. The molecular structural formula of the PGN-based thermoplastic polyurethane elastomer containing the Diels-Alder bonds is as shown in the specification. In the formula, n is an integer ranging from 7 to 60, x is an integer ranging from 1 to 6, y is an integer ranging from 5 to 100, and y is an integer. According to the related preparation method,PGN is used as a prepolymer, 1-hydroxymethyl-10-oxabicyclo[5.2.1.02,6]dec-8-ene-3,5-dione-2-aminoethanol is used as a chain extender, diphenylmethane diisocyanate (MDI) is used as a coupling agent, and the PGN-based thermoplastic polyurethane elastomer containing Diels-Alder bonds is prepared through a chain extension reaction one-pot method. The PGN-based thermoplastic polyurethane elastomer containing the Diels-Alder bonds is simple and feasible in preparation route, has a self-repairing function, and has a wide application value in the field of polymer bonded (PBX) explosives.

The invention discloses a thermal self-repairing PNIMMO-based thermoplastic elastomer and a preparation method thereof, aiming at solving the problem that a traditional polyurethane elastomer is difficult to repair after being damaged. The molecular structural formula of the thermal self-repairing PNIMMO-based thermoplastic elastomer is shown in the specification, in the formula, n is an integer ranging from 7 to 60, and x is an integer ranging from 5 to 100. The preparation method comprises the following steps: firstly, with PNIMMO and furoyl chloride as raw materials, preparing furyl-terminated modified PNIMMO through an elimination reaction; and then preparing the thermal self-repairing PNIMMO-based thermoplastic elastomer through Diels-Alder reaction by taking furyl-terminated modifiedPNIMMO as a prepolymer and 4,4'-bismaleimide diphenylmethane as a chain extender. The thermal self-repairing PNIMMO-based thermoplastic elastomer disclosed by the invention is simple and feasible insynthetic route, has a self-repairing function and has a wide application value in the field of polymer bonded (PBX) explosives.

The invention discloses an impeller of a hydraulic turbine and a forward design method thereof, and the method comprises the following steps: (1) dividing an impeller blade into a front end and a rear end in the extension direction from an inlet to an outlet of the impeller; the angle formed when the front end is placed is an inlet placing angle, namely an inlet torsion angle; the angle formed when the rear end is placed is an outlet placing angle, namely an outlet torsion angle; (2) calculating an inlet torsion angle and an outlet torsion angle of an impeller matched with the outflow of the volute according to the shape of the volute and the flowing law of the outflow by taking the performance of the hydraulic turbine as an optimization target; (3) according to the working condition of the hydraulic turbine, the inlet torsion angle and the outlet torsion angle are inspected and corrected; and (4) determining a torsion angle change rule in the streamline direction of the impeller blade and the overflowing interface direction of the vertical streamline according to a positive and negative problem iteration principle. By optimizing the inlet torsion angle of the impeller blade, the turbine energy characteristic is improved, and the existing pressure energy utilization rate is increased.

The present invention relates to electrical engineering, particularly to synchronous reluctance machines, and can be used in electrical drives for machines and mechanisms, as well as in electrical power generators. The synchronous reluctance machine comprises a stator with a winding arranged within stator slots, and a rotor mounted to provide a gap between the rotor and the stator, the rotor being rotatable with respect to the stator and comprising radially alternating magnetically permeable layers and flux barriers, wherein each barrier comprises at least one peripheral end extending towards the circumferential rotor surface and the angular pitch of the peripheral ends decreases in circumferential direction from the peripheral ends of the outer barriers towards the peripheral ends of the deepest inner barriers among at least three circumferentially sequential peripheral ends, wherein at least two of said ends are inner barrier ends. This results in improved energy characteristics of the reluctance machine, in particular power factor, efficiency and specific power thereof, for the same number of flux barriers. This is further achieved by a synchronous reluctance machine comprising a stator with a winding arranged within stator slots, and a rotor mounted to provide a gap between the rotor and the stator, the rotor being rotatable with respect to the stator and comprising radially alternating magnetically permeable layers and flux barriers, the gap is increased by 15-400% between the surface of the most external magnetically permeable layer and the stator compared to other sections of the gap.

The invention discloses perdeuterated ammonium dinitramide and a preparation method thereof, belonging to the technical field of synthesis of deuterated energetic materials. According to the invention, purification is simple, and a high-purity product can be obtained without adsorption and solvent elution; the product does not contain metal ions such as potassium ions, does not cause catalyst poisoning in the use process, and is widened in application range; reaction process is judged by measuring the pH value of a solution, and the reaction endpoint judgment method is simple; and deuterated ammonia gas can be recycled after being collected, so the waste of deuteration raw materials is reduced, and production cost is reduced. Compared with common ammonium dinitramide, the initial decomposition temperature of the perdeuterated ammonium dinitramide is increased to about 150 DEG C, and the thermal stability of the perdeuterated ammonium dinitramide is obviously improved; and crystalline density is increased, and meanwhile, energy characteristic is obviously improved. According to the preparation method disclosed by the invention, the preparation of the perdeuterated ammonium dinitramide can be realized, and a reference is provided for industrially producing the perdeuterated ammonium dinitramide.

A film target for laser-induced particle acceleration includes a first target layer on which a laser is incident; an intermediate layer located behind the first target layer along a propagating direction of the laser, and in which an intended ion beam is generated; and a second target layer located opposite to the first target layer with the intermediate layer interposed therebetween.

A radiation detector obtains radiation information by detecting a light pulse occurred in response to a radiation in a scintillation fiber at one end or opposite ends of the scintillation fiber. The scintillation fiber is surrounded by a scattering member which emits an electron by interaction with the radiation.