86results about How to "Large volume change" patented technology

A self-powered medical device, for example a pacemaker uses the variations of blood pressure inside the heart or a major artery to create a mechanical resonance in an electromagnetic or piezoelectric generator. The resonance extends the time power is generated during the cardiac cycle. The pressure variations compress a bellows carrying the resonant generator. The inside of the bellows may be evacuated to a partial or full vacuum, and a spring restores the bellows to the desired equilibrium point, acting against the blood pressure. The current pulses are stored in a capacitor. Eliminating the battery allows dramatic miniaturization of the medical device to the point it can be implanted at the point of desired stimulation via a catheter.

A compressible hearing aid includes an exterior deformable skin which bounds an internal region which is filled, at least in part, with an open-cell foam, the foam can be wrapped around or molded to contain an audio output transducer. The skin is not self-supporting and in response to applied forces from user's ear canal, the skin and the foam both deform and readily compress exhibiting a reduced volume. Though compressed, the foam exerts an outward force against the skin thereby continuing to form an elongated seal between the skin and the external periphery of the user's dynamically changing ear canal. As the volume of the ear canal increases, the skin and open-cell foam expand, exhibiting an increased internal volume, while maintaining a comfortable seal with the ear canal. A plurality of external ribs carried on the skin not only reduces feedback but promotes drying of the ear canal and promotes retention of the hearing aid in the ear canal.

The invention discloses a high-temperature-resistant insulation coating and a preparation method and application thereof. Slurry for preparing the high-temperature-resistant insulation coating is at least prepared from the following components in parts by mass: (a) 100 parts of polysilazane resin, (b) 1-100 parts of polysiloxane resin containing active functional groups, (c) 5-100 parts of a filler, and (d) 0-10 parts of an assistant. By adopting the polysilazane resin as a primary film forming substance and adopting the polysiloxane resin containing the active functional groups as a secondaryfilm forming substance, the high-temperature-resistant property is ensured, and the coating also has good tenacity; the preparation method is simple and does not rely on special equipment; the temperature-resistant property of the high-temperature-resistant insulation coating prepared through the method can be appropriately adjusted according to actual needs so as to adapt to different application fields; and the preparation method is wide in application range and can be suitable for various insulation objects, strips, pipes, wires and the like.

The combination of the sole (1)—equipped in the upper front-middle portion with the broad shaped cavity (2) and with the thin duct (3) therewith said broad shaped cavity (2) is brought in communication with the outside through the unidirectional valve (4)—of the stretching structure (5) with high change in volume implemented with flexible material with high elasticity, and of the insole (6) made of waterproof material equipped both with deformation (7) apt to cooperate with the broad shaped cavity (2) in the sole (1), to originate, under the action of the stretching structure (5), a pad-like projecting shaping, both with one or more holes (8), at said deformation (7) and in a position so as to be clogged by the foot during walking.

A rotary heat engine having a cylinder and a rotor having a rotating shaft rotatably placed in the cylinder. The cylinder has a heat receiving section for supplying heat to the inside of the cylinder and a heat radiating section for radiating heat from the inside. The engine also has an engine section body and an operation liquid storage section. A vaporized gas supply channel and a gas recovery channel communicating with the inside of the cylinder are provided, respectively, on the heat receiving section side and heat radiating section side of the cylinder in the engine section body. The operation liquid storage section is between the vaporized gas supply channel and the gas collection channel in order to aggregate and liquefy recovered gas and is installed such that both channels fluidly communicate with each other. Also, the operation liquid storage section has a heat insulation dam provided with a through hole for preventing backflow of fluid flowing inside.

The invention discloses a method for preparing an yttrium tantalate high-temperature ceramic through a solid phase method, wherein the molecular formula of the compound yttrium tantalate is YTaO4. According to the preparation method, the used raw materials are yttrium oxide and tantalum oxide; and the method comprises: weighing the raw materials according to a certain ratio, mixing the raw materials in anhydrous ethanol, placing into a planetary ball mill, carrying out ball milling to achieve a uniformly-mixing state, drying the mixed powder, screening, placing into a mold, compacting, pre-sintering, cooling, taking out the pre-sintered sample, grinding, carrying out ball milling, drying, screening, placing the screened powder into the mold, compacting, and carrying out secondary sintering. According to the present invention, the product purity of the process is high, the impurity content is low, the product preparation cost is low, the method is suitable for mass production, and the target product is expected to be used as the novel high-temperature resistant, anti-oxidation and anti-wear ceramic material.

The invention discloses an active water-draining type fuel cell. The active water-draining type fuel cell comprises a positive electrode structure, a negative electrode structure, a proton exchange membrane positioned between the positive electrode structure and the negative electrode structure, and a water-draining apparatus, wherein the positive electrode structure comprises a positive electrode runner plate, a positive electrode dispersion layer and a positive electrode catalytic layer which are arranged from the top to bottom in sequence; the positive electrode catalytic layer is connected with the proton exchange membrane; the negative electrode structure comprises a negative electrode catalytic layer, a negative electrode dispersion layer and a negative electrode runner plate which are arranged in sequence; the negative electrode catalytic layer is connected with the proton exchange membrane; the negative electrode runner plate comprises a porous carbon core layer and a graphite base layer; the upper part of the porous carbon core layer is connected with the negative electrode dispersion layer while the lower part of the porous carbon core layer is connected with the graphite base layer; and one end of the porous carbon core layer extends to be connected with the water-draining apparatus. The active water-draining type fuel cell has the beneficial effects as follows: the negative electrode runner plate adopts the porous carbon core layer and the graphite base layer, so that liquid water generated by a reaction in the fuel cell can be led out actively so as to effectively prevent from water logging; and in addition, the additionally provided water-draining apparatus is simple in structure and easy to realize.

A non-aqueous electrolyte secondary battery including a positive electrode having a positive electrode mixture layer containing a positive electrode active material, a binder, and a conductive agent, and a negative electrode having a negative electrode active material capable of intercalating and deintercalating lithium. The positive electrode active material includes a layered lithium-transition metal composite oxide represented by the compositional formula Li_aNi_xM_(1-x)O₂ where 0<a≦1.1, 0.5<X≦1.0, and M is at least one element. The binder contains a fluororesin and a nitrile-based polymer. The amount of the nitrile-based polymer is 40 mass % or less with respect to the total amount of the binder.

The invention provides a method for preparing carbon nanotube and PCM-combined phase change temperature control component, which aims to provide a method for preparing a phase change temperature control component with high phase change latent heat and better heat conduction effect. The present invention is implemented as follows: casting pyrolytic graphite in the heat sink bottom and the verticalhot wall surface of a metal conductor packaging container; combining carbon nanotubes and phase change materials by ultrasonic vibration to form a carbon nanotube and phase change composite material,and charging the liquid carbon nanotube and phase change composite material in a heat conductive reinforcing skeleton by a vacuum co-fusion method; welding the heat conductive reinforcing skeleton ina phase change cavity to form a multilayer phase change latent heat self-control adjustment level that the pyrolytic graphite wrapping, in a U-shape, heat conductive reinforcing skeleton, and forminga thermal insulation buffer layer from the phase change cavity; and finally, welding a cover plate on the stepped opening of the metal conductor packaging container by electron beam welding, enclosingto form a closed phase change temperature control component, and processing to obtain the boundary dimension according to requirements.

The present disclosure provides an anode for a secondary battery, including: an electrode current collector; a first coating layer formed on the electrode current collector and including an anode active material, a first nonaqueous binder and a conducting material; and a second coating layer formed on the first coating layer and including a second nonaqueous binder. Since the anode of the present disclosure can reduce volume change of the anode active material, a lithium secondary battery including same may have improved cycle characteristics.

The invention discloses a mucus drag reduction device for a underwater vehicle, which belongs to the technical field of ship drag reduction and efficiency increasing. The mucus drag reduction device for the underwater vehicle comprises an air cylinder, a piston cylinder, a flow control valve, a controller, a joint, mucus, an air pipe and liquid pipes. The cavity of the piston cylinder is divided into two parts through a piston; the cavity on one side is connected with the air cylinder through the air pipe; the mucus is within the cavity on the other side; the cavity, full of the mucus, of the piston cylinder is connected with an inlet of the joint through the liquid pipe with the flow control valve; more than one outlets of the joint are respectively connected with mucus releasing holes in a underwater vehicle housing through the liquid pipes; and the controller is connected with the flow control valve. According to the invention, the drag reducing mucus releasing speed can be automatically adjusted according to the navigational speed of the underwater vehicle so that the drag reducing mucus uniformly and persistently cover most external surface of the underwater vehicle to increase the maximum navigational speed of the underwater vehicle and energy consumption can be also reduced at equivalent navigational speed.

The invention relates to a repair welding method for a magnesium alloy casting oil way. A graphite material is used as a repair welding base plate for carrying out repair welding on defects of a casting, so that the purpose of repair is achieved. The characteristics of softness, easy removal, high temperature resistance and thermal shock resistance of graphite are utilized, in the using process, the repair welding base plate can bear acute changes of temperature so that damage and cracks can be prevented, and has various properties needed by an argon arc welding base plate, it is possible to repair the defects of the magnesium alloy casting oil way part, and the purpose of saving the casting is achieved.

A rotating vane-meshed type volume changing mechanism is disclosed. The mechanism can be used for compressors, vacuum machines, engines and various hydrodynamic force machines requiring formation of directional movement of fluids. The mechanism mainly includes middle fixed bodies, rotating plates and periphery rotating bodies. To achieve different functions, the middle fixed bodies at least have three different types and the periphery rotating bodies at least have two different types. The mechanism is characterized in that each of the middle fixed bodies is radially provided with at least tworotating-plate slots; the centers of the rotating plats are provided with rotation holes; and bolts pass through the rotation holes and the rotating plates are mounted in the rotating-plate slots. Therotating plates are radially provided with at least three inclined rotating vane meshing slots. The periphery rotating bodies are provided with rotating vanes the number of which is same as that of the rotating vane meshing slots. The rotating vanes have same degrees of inclination with the rotating vane meshing slots, and are meshed with the rotating plates through the rotating vane meshing slots. In a process that the rotating vanes and the rotating plates are meshed and rotate, a zone the size of which changes periodically is formed among the rotating vanes and the rotating plates.

The invention discloses a Sm-Gd-Dy tri-rare-earth ion tantalate and a preparation method and application thereof. The general chemical formula of the Sm-Gd-Dy tri-rare-earth ion tantalate is SmGdDy<c>TaO<7>, wherein the a, b and c meet the relationship of a+b+c=3 and are separately in a range of 0.8-1.2. The preparation method comprises the following steps: (1) weighing samarium nitrate, gadolinium nitrate, dysprosium nitrate and tantalum oxalate according to a stoichiometric ratio, performing mechanical mixing with citric acid with a preset amount under a heat preservation condition, adding a concentrated ammonia water neutralization solution during the mixing process, and carrying out mechanical mixing to promote a complexation reaction under a heat preservation condition; and (2)drying the obtained solution, and then carrying out calcination at a high temperature to remove carbon impurities to obtain the Sm-Gd-Dy tri-rare-earth ion tantalate powder. The Sm-Gd-Dy tri-rare-earth ion tantalate has good high-temperature thermal stability and low thermal conductivity, and can be used as a thermal barrier coating material.