18results about How to "Reduce dissipation" patented technology

This invention discloses a large-area photo-chargeable aqueous zinc-ion battery, its preparation method, and its application. The method includes the following steps: Two pieces of glass with a transparent conductive layer coated on one side are taken. A positive electrode material is placed on the coated layer of one of the glass pieces. A glass fiber separator and a negative electrode material are sequentially covered on top of the positive electrode material. The other glass piece is then placed on top of the negative electrode material with its coated layer facing down. The positions of the two glass pieces are adjusted so that they are stacked alternately. Pressure is applied to the resulting stacked structure, and three sides are sealed with hot melt adhesive. After the hot melt adhesive has cured, electrolyte is injected into the unsealed side, and then this side is sealed again. The negative electrode of a diode is connected to the glass on the positive electrode side of the battery, and the positive electrode of the diode is connected to the glass on the negative electrode side of the battery, thus obtaining a large-area photo-chargeable aqueous zinc-ion battery. The battery of this invention has the advantages of high light utilization, stable charging, and low loss.

A kind of deep hard rock hole wall-hole end while drilling fracturing microwave drill bit and method, including microwave drill bit, microwave drill bit is successively equipped with support frame front plate, metal sleeve and water inlet ring, metal sleeve is connected with the rotary drive I installed on support frame front plate, microwave drill bit is connected with microwave mode converter and microwave shunt II respectively, microwave mode converter and microwave shunt II are connected with microwave shunt I by rectangular waveguide respectively, microwave shunt I is successively connected microwave rotary joint, fixed waveguide and microwave generating device, microwave rotary joint is connected with the rotary drive II installed on support frame rear plate;Support frame front plate, support frame rear plate and microwave generating device are installed on the equipment mobile platform of fixed base, counterforce support of fixed base is connected between support frame front plate by driving, the present application realizes hard rock fast drilling while hole wall rock mass fracturing release stress, improves the efficiency of microwave stress release technology.

This invention provides a hybrid-mode MRE vibration isolator and its design method. The hybrid-mode MRE vibration isolator is installed on the drive shaft of rotating equipment and includes an irregularly shaped stacked MRE. The irregularly shaped stacked MRE is frustum-shaped, and contains multiple layers of spacers and MRE material layers arranged in parallel at intervals. The spacers are made of ferromagnetic metal. By employing a frustum-shaped stacked MRE with different upper and lower diameters, this hybrid-mode MRE vibration isolator reduces the dimension of the controlled object compared to existing cylindrical MRE vibration isolators. This hybrid-mode MRE vibration isolator directly transfers abnormal vibration energy from large rotating equipment to the MRE material through the drive shaft. The change in MRE stiffness can suppress abnormal vibrations. This vibration isolator is suitable for intelligent vibration reduction of large rotating equipment, especially in rotating shear applications.

This utility model belongs to the field of interventional medical devices, specifically relating to a medical endoscope catheter, comprising: a tubular body, wherein an airflow channel extending axially along the inner wall of the tubular body is provided; an end wall, disposed at the first end of the tubular body, wherein a through hole is provided through the end wall, and a plurality of circumferentially spaced ribs are provided on the side of the end wall facing the inner cavity of the tubular body, wherein each rib is distributed in a vortex shape. The airflow is continuously guided by the arched ribs to form a stable vortex ring, reducing energy dissipation caused by turbulence and improving airflow utilization under the same air source pressure; this utility model transforms disordered flow into controlled vortices through geometric constraints on the airflow path, improving cleaning efficiency while reducing the system's working air pressure.

This invention belongs to the field of materials technology, specifically relating to a method for preparing a high-resilience polyurethane material. This invention involves preparing a flame-retardant chain extender to participate in the chain-extended polymerization of polyurethane. Firstly, the flame-retardant chain extender contains both primary and secondary amine groups, thus acting as a crosslinking agent to some extent during the chain-extended polymerization process. By strictly controlling its addition amount, a moderate crosslinking effect can be achieved on the polyurethane molecular chains, limiting irreversible slippage of the polyurethane molecular chains under stress, reducing energy dissipation, and effectively improving the resilience of the polyurethane material. Simultaneously, since the flame-retardant chain extender also contains nitrogen and phosphorus flame-retardant elements, it can promote the rapid catalytic formation of an expanding carbon layer in the early stages of combustion, reducing heat transfer and isolating gases, thus effectively improving the flame-retardant properties of the polyurethane material.

The invention discloses a resistance-reducing turbulent flow rib structure in a wheel cover, and belongs to the technical field of automobile parts, the resistance-reducing turbulent flow rib structure in the wheel cover comprises a wheel cover body, a wheel brow is fixedly connected to the edge of the outer side of the wheel cover body, a wheel cover internal turbulent flow rib is arranged on the upper edge of the inner side wall of the wheel cover body, and the wheel cover internal turbulent flow rib and the wheel cover body are integrally formed in a compression molding mode. The top of the outer side wall of the wheel eyebrow is fixedly connected with a wheel eyebrow decorating part. An inner concave part is arranged at the top of the wheel cover body, and the inner concave part is of an arc-shaped concave structure; according to the wheel cover, the inner turbulence rib structure of the wheel cover is additionally arranged in the wheel cover body, so that the flowing state of air flow in a wheel cavity is improved, generation of vortexes at the inwards-concave position is greatly reduced, energy dissipation and air resistance in the vehicle running process are reduced, and the endurance mileage of a vehicle is increased.

This invention relates to the field of chemical production technology and discloses an apparatus and method for the large-scale production of boron nitride nanomaterials. The apparatus includes a vacuum chamber, a cooling water circulation system, a vacuum pumping system, an exhaust system, a gas path, an automatic stirring device, a material reaction container, and a heating device. The automatic stirring device controls the mixing and stirring of the materials. The material reaction container is connected to multiple evenly distributed air inlets. The heating device surrounds the material reaction container and controls the reaction temperature. This invention improves the thermal treatment effect and chemical reaction efficiency of the raw materials in the gas by equipping the material reaction container with an automatic stirring device and multiple densely distributed air inlets, effectively increasing the quality and quantity of materials processed per batch and improving the production efficiency of boron nitride nanomaterials. The apparatus is simple, has low manufacturing cost, and is easy to scale up; the production method is simple, energy-efficient, and pollution-free, meeting the needs of large-scale preparation of boron nitride nanomaterials.

The application provides a kind of vapor deposition device, it includes: processing cavity, inside being equipped with liftable susceptor, the susceptor is used to carry wafer;Several lift pins are arranged in the susceptor, for lifting the wafer;Heating assembly is arranged in the processing cavity, including: heating lamp group and at least two rotatingly connected support arms, the support arm is used to carry the heating lamp group, to drive the heating lamp group moves between the wafer and the susceptor.The application controls the motion trajectory of heating lamp group, makes the heat of heating lamp group evenly distributed on wafer, realizes the uniform heating of wafer, and reduces heat dissipation, improves heat utilization and heat treatment efficiency.

The invention discloses boron nitride coated high-strength elastic ceramic nanowire aerogel as well as a preparation method and application thereof, and belongs to the technical field of superelastic inorganic material preparation. Comprising the following steps: taking silicon carbide nanowire aerogel or silicon nitride nanowire aerogel as a framework, uniformly coating boron nitride on the surface of the framework by adopting a chemical vapor deposition method, and forming fixed boron nitride nodes between adjacent or contacted silicon carbide or silicon nitride nanowires. The strength of the prepared ceramic nanowire aerogel can reach 787.0 kPa, and the ceramic nanowire aerogel has good recovery capacity under the compression strain of 80% and is expected to be used as materials for high-temperature heat prevention and insulation, high-performance damping, heat sealing and the like in an extreme environment.

This utility model relates to the field of lipstick production technology, and in particular to a high-efficiency cooling mechanism for lipstick machines. It includes a cooling chamber, a mold positioning plate attached to the upper end of the cooling chamber, and multiple lipstick forming molds attached to the mold positioning plate. A cold air supply unit is installed inside the cooling chamber, having an air outlet and an air inlet located within the cooling chamber. The air outlet of the cold air supply unit faces the mold positioning plate, allowing circulating cold air to be generated within the cooling chamber and blown towards the mold positioning plate. By adopting an independent cooling chamber combined with a circulating cold air design, there is no need to rely on a long conveyor line, significantly reducing the overall size of the equipment, lowering the external surface area to reduce cold air dissipation, and shortening the pre-cooling time. The cold air is directly blown onto the molds and circulates, improving cooling uniformity and efficiency, and ensuring the quality of the lipstick forming. It is suitable for rapid production of small batch orders, and can efficiently cool even during small-batch production, enhancing production flexibility.

The invention relates to the technical field of energy systems, and provides a wind-light-fire storage integrated energy system with ammonia electricity production and carbon capture functions, which comprises a photovoltaic wind power generation system, a liquid air energy storage system, an electrolyzed water system, an ammonia synthesis system, a heat reservoir and a pure oxygen coal-fired power generation system. The photovoltaic and wind power generation system can integrate photovoltaic, wind power generation, liquid air energy storage, water electrolysis hydrogen production, ammonia synthesis and carbon capture technologies, can operate in three modes of sufficient power generation, insufficient power generation and power failure of the photovoltaic and wind power generation system, and improves the utilization rate and operation efficiency of equipment.

This application relates to the field of computational fluid dynamics and discloses a method for calculating the flow field of a transonic vehicle based on a low-dissipation TVD limiter. The method includes: determining the pressure difference between the first, second, and third grid cells based on their pressures; obtaining the limiter's output based on the flux difference in the first and second directions of the first and second grid cells, respectively, and the pressure difference between the first and second grid cells; traversing all grid cells in the spatial grid to obtain all the limiter's outputs; and solving the transonic vehicle's flow field based on the spatially discrete MUSCL scheme and the time-dissipated Runge-Kutta method, using all the limiter's outputs. This application, through a low-dissipation TVD limiter, accurately captures weak shock waves and reduces numerical dissipation, thereby significantly improving the accuracy and precision of transonic vehicle flow field calculations.

This invention relates to the field of optics, specifically to a zoom lens and an imaging device. The zoom lens, from the object plane side to the image plane side, consists of a first fixed lens group with positive optical power, a zoom lens group with negative optical power, a second fixed lens group with positive optical power, a focusing lens group with negative optical power, and a third fixed lens group with positive optical power. The second fixed lens group includes two sets of cemented lenses; the third fixed lens group includes at least one lens with positive optical power. The zoom lens satisfies the following conditions: ft / fw > 20; TTL < 100mm; 2 < fG5 / fw < 3. By limiting the focal length of the third fixed lens group and the internal lenses, the third fixed lens group can effectively correct chromatic aberration and aberrations of the preceding lens groups, thus increasing the imaging quality of the zoom lens.

The present application relates to the field of optics, in particular to a middle magnification integrated lens, the middle magnification integrated lens is sequentially composed of a first fixed lens group with positive focal length, a first variable magnification lens group with negative focal length, a diaphragm, a second variable magnification lens group with positive focal length, a focusing lens group with negative focal length and a second fixed lens group with positive focal length from the object plane side to the image plane side; the middle magnification integrated lens satisfies the following conditional expressions: 10 < ft / fw < 15; fno < 4.8; wherein, ft is the focal length of the middle magnification integrated lens in a telephoto state, fw is the focal length of the middle magnification integrated lens in a wide-angle state, and fno is the aperture number of the middle magnification integrated lens. On the basis of realizing the middle magnification integrated lens, the brightness of the middle magnification integrated lens in the telephoto state can be greatly increased, and the experience of the user is improved; meanwhile, through the effect of three-group linkage, the volume of the middle magnification integrated lens is reduced, and the miniaturization of the middle magnification integrated lens is realized.

This application relates to the field of range hoods, specifically a method for arranging the leading edge serrations of blades on an impeller of a centrifugal fan, comprising: obtaining the pitch λ of the first serrations on the leading edge of the first blade. b ; Obtain the sawtooth pitch λ at λ b Empirical parameter values ​​K and i related to the relationship between the vortex size D and the vortex energy E in the vicinity of λ. b Nearby empirical parameter values ​​L and j are obtained; the pitch λ of the second serration on the leading edge of the second blade is obtained. xb The ratio N between the number of the first blade and the number of the second blade is used to obtain the average energy E of the vortex generated by the N+1 blades in a blade unit. ave According to E ave λ is derived b , λ xb The relationship between N and N. This application, through the above method, makes the flow of small-sized vortices more stable and the streamlines of small-sized vortices more ordered, thereby reducing the degree of chaos in turbulence and lowering energy dissipation.

This invention relates to a stent for a valve prosthesis and the valve prosthesis itself. The valve prosthesis includes an artificial leaflet, a skirt, and a stent. The artificial leaflet is fixed within the lumen of the stent, and the skirt covers the inner and / or outer surfaces of the stent. The stent has a profile adapted to the native valve annulus, and includes a first leaflet portion, a commissure portion, and a second leaflet portion distributed circumferentially. The commissure portion is located between the first and second leaflet portions. The height of both the first and second leaflet portions is greater than the height of the commissure portion, so that the inflow end of the stent has a shape that is high at both ends and low in the middle. The stiffness of both the first and second leaflet portions is less than the stiffness of the commissure portion. This ensures that the valve prosthesis can dynamically adapt to the native valve annulus during cardiac systole and diastole, improving the lifespan of the valve prosthesis and reducing its impact on ventricular remodeling.

The invention relates to a stimulation current error measurement device for an implantable nerve stimulator. The stimulation current error measurement apparatus may include: an actual stimulation voltage generation module configured to generate a sampling value of an actual stimulation voltage of a stimulation electrode; the stimulation error voltage generation module is configured to generate a plurality of preset stimulation error voltage thresholds; the stimulation voltage error comparison module is electrically connected with the stimulation voltage error generation module and the actual stimulation voltage generation module, and the stimulation voltage error comparison module is configured to receive a sampling value of the actual stimulation voltage and a plurality of preset stimulation error voltage thresholds; comparing the sampling value of the actual stimulation voltage with one or more of a plurality of preset stimulation error voltage thresholds, and generating a comparison result; and the control module is electrically connected with the stimulation voltage error comparison module, and the control module is configured to judge the relative error of the actual stimulation current based on the comparison result.

This invention relates to the field of ventilation equipment technology, and discloses a design method for blades, centrifugal impellers, centrifugal fans, and the blades themselves. The blades are applied to a centrifugal impeller, which has a central shaft. The blades have an inlet edge and an outlet edge, with the inlet edge close to the central shaft and the outlet edge away from it. The inlet edge includes a first curved segment and a second curved segment that are smoothly connected; the first curved segment is concave, and the second curved segment is convex. The outlet edge includes a third curved segment, which is also concave. The design method for the blades, centrifugal impellers, centrifugal fans, and the blades of this invention can overcome the efficiency bottleneck of current centrifugal impellers, further improving their efficiency.