149 results about "Premature failure" patented technology

To protect the collimator of a transferred plasma arc torch from premature failure due to corrosion, an anti-corrosive covering is applied on the exposed face surface and a portion of the inner exit bore of the collimator. The specification describes several methods for producing the collimator for a plasma torch having an anti-corrosive coating or cladding on the exposed surfaces thereof, including electroplating, electroless plating, flame spraying, plasma spraying, plasma transferred arc, hot isostatic pressing and explosive cladding.

A significant problem in PEM fuel cell durability is in premature failure of the ion-exchange membrane and in particular by the degradation of the ion-exchange membrane by reactive hydrogen peroxide species. Such degradation can be reduced or eliminated by the presence of an additive in the anode, cathode or ion-exchange membrane. The additive may be a radical scavenger, a membrane cross-linker, a hydrogen peroxide decomposition catalyst and/or a hydrogen peroxide stabilizer. The presence of the additive in the membrane electrode assembly (MEA) may however result in reduced performance of the PEM fuel cell. Accordingly, it may be desirable to restrict the location of the additive to locations of increased susceptibility to membrane degradation such as the inlet and/or outlet regions of the MEA.

A loudspeaker for generating sound from an electrical current provided by an external source may include an adapter and/or a guide for supporting, directing and routing lead wires carrying the electrical current from the external source. The lead wires may be routed through a guide supported by a pole assembly in the center of the loudspeaker in order to keep the mass associated with the lead wires as near as possible to a moving voice coil former. In this manner, detrimental effects of premature failures and undesirable noise caused by movement of loudspeaker components during operation may be significantly reduced. The guide may include apertures for supporting the lead wires at a desired angle and directing the lead wires toward the external source. Alternatively, or in combination with the aforementioned guide, the lead wires may be routed through an adapter attached to the voice coil former. The adapter may include apertures for positioning splices connecting flexible wires and voice coil lead wires which form the lead wires. A method of protecting the lead wires which carry the electric signal from the external source to the loudspeaker from damage due to movement during operation of the loudspeaker is also provided.

The invention discloses a preparation method of tungsten-copper electrical contact material with high arc ablation resistance, the method is carried out according to the following steps: copper powder, tungsten powder and rare earth simple substance lanthanum or cerium are firstly weighted according to the proportion; the mechanical alloying is then carried out in a high-energy ball mill; nickel powder and ethanol are further added to carry out the common mechanical mixing; the press forming is carried out in a mold; a green compact is finally arranged in a sintering furnace with high-temperature protective atmosphere for adopting the infiltration technology for sintering and molding, thus obtaining the tungsten-copper electrical contact with high arc ablation resistance. The method of the invention can effectively solve the problem of premature failure caused by serious ablation of the surface of the contact due to the arc ablation, improve the performance and prolong the service life of the tungsten-copper electrical contact material.

The invention adopts organic cation intercalator and coupling agent to carry out organification intercalation processing on laminated clay silicate, so as to prepare organification laminated clay silicate and mix the silicate with liquated road asphalt to form the modified asphalt. The invention also relates to the preparation process of the modified asphalt. The modified asphalt of the invention not only has better road performance than that of matrix asphalt but also prevents premature failure of asphalt road surface and lengthens service life of the road surface; in addition, the cost of materials and processing devices is far lower than the cost of polymer nano modified asphalt.

The invention discloses a scheduling method for tracking a photovoltaic planned output by using a battery storage energy and a hydrogen storage energy. The scheduling method comprises the steps of making an output plan of a next day based on a short-term photovoltaic prediction power, and making different day-ahead scheduling schemes according to magnitudes and fluctuation violent degrees of prediction errors of photovoltaic powers in a sunny day and a non-sunny day; correcting a day-ahead photovoltaic planned output by using an ultrashort-term photovoltaic prediction power; and then, selecting an appropriate real-time scheduling scheme according to a state of charge of a storage battery, and calculating an actual output of a photovoltaic power generation system as well as input powers ofthe storage battery and an electrolytic bath to output to a central control unit of the photovoltaic power generation system, thereby performing real-time scheduling on each power generation electricmodule in the system. The impact on the power system is reduced, the frequency modulation pressures of water and thermal generation units are alleviated, an energy storage battery is guaranteed to work in a low-load state beneficial to prolonging the service life, the frequent change of the energy storage battery due to premature failure is prevented, and the total cost in a whole life cycle of the system is reduced.

An electrode for a plasma arc torch includes a hollow elongated body having an open end and a closed end and an end face located at the closed end inside of the hollow elongated body. The end face has a center portion. A plurality of heat exchanging elements are in thermal communication with the end face. The heat exchanging elements have side walls defining an elongated channel between adjacent heat exchanging elements. The elongated channel extends radially from the center portion to an inner surface of the elongated body. The elongated channel provides a thermally conductive path that transfers sufficient heat from the elongated body to a cooling fluid during an operation of the plasma arc torch to prevent premature failure of the electrode.

Disc springs that are resistant to premature failure caused by friction wear, disc spring assemblies and disc spring stacks comprising said disc springs, and methods of making and using said assemblies and stacks are disclosed.

The invention discloses a method for preparing a WMo graphite composite rotating-anode target material used for a large-power X-ray tube. Tungsten powder, molybdenum powder and adhesive with the certain mass are subject to the cold press to form a composite green compact, isostatic pressing formed graphites with the same diameter and the composite green compact are orderly placed into a graphite mold, a bonding layer of the composite green compact contacts the graphites, the mixture is placed into a vacuum hot pressure sintering furnace to perform hot pressure sintering molding, a sintered W/Mo/graphite composite material is implemented with dynamic balance adjustment and is subject to the cutting process, and the W/Mo/graphite composite target material can be obtained. A ply laminating technology is adopted to obtain a tungsten-molybdenum composite layer which has thin tungsten layers and thick molybdenum layers and has even and consistent density distribution, and a braze welding technology and a diffusion welding technology are combined to obtain the connection of metal molybdenum and the high-performance graphites by adding a transition layer. The method effectively solves the problem of premature failure of an anode target material caused by bad heat dissipation in the vacuum environment and under the using condition of alternating thermal load, and improves the service life of the anode target material.

Methods and apparatus are disclosed, such as those involving a flash memory device. One such method includes storing data on memory cells on a memory block including a plurality of word lines and a plurality of memory cells on the word lines. The word lines comprising one or more bottom edge word lines, one or more top edge word lines, and intermediate word lines between the bottom and top edge word lines. The data is stored first on memory cells on the intermediate word lines. Then, a remaining portion, if any, of the data is stored on memory cells on the bottom edge word lines and/or the top edge word lines. This method enhances the life of the flash memory by preventing a premature failure of memory cells on the bottom or top edge word lines, which can be more prone to failure.

A friction clutch assembly comprises a cover mounted on a flywheel of a driving shaft. A pressure plate has a contact surface for receiving a driving force from the driving shaft that is axially moveable between an engaged position and a disengaged position. A spring supported by the cover urges the pressure plate into the engaged position. Compression of the spring releases pressure on the pressure plate to permit movement of the pressure plate to the disengaged position. At least one spacer attached to the cover and flywheel has an external surface that engages the pressure plate upon rotation of the flywheel. The external surface of the spacer conforms to the contact surface of the pressure plate so that torque is transmitted between the flywheel and the pressure plate over at least a line of engagement of the spacer external surface and the pressure plate contact surface upon rotation of the flywheel. The cover may have a continuous curved surface with a varying radius of curvature over a length of the curve to resist deflection and prevent premature failure of the cover.

The invention discloses a ballastless track-structured waterproof vibration-reducing flexible protecting structure and a paving method thereof. A waterproof linking layer and a buffer protecting layer are paved between the bottom of a ballastless track foundation plate and the top surface of a surface layer/bridge deck slab of a roadbed in a full-width manner. According to the ballastless track-structured waterproof vibration-reducing flexible protecting structure, by virtue of the linking layer and the buffer protecting layer which are paved on the full fracture surface, the overall stereoscopic water proofing and the integrality are realized; by regulating the dynamic modulus, the damping characteristic and the deformation adaptability of an asphalt concrete protecting layer by virtue of a special modifying enhancer, the rigidity matching and buffer vibration reducing functions are realized; and by enhancing the load diffusivity, the fatigue durability and the water damage resistance of asphalt concrete by virtue of the special modifying enhancer, the problems of premature failure, interlayer slurry extruding, disengaging, even frost heaving and the like of waterproof layers of existing ballastless track roadbeds are effectively solved, the integrality, the smoothness, the uniformity and the long-term stability of a lower base structure of a track are improved, and good and stable support is provided for a ballastless track plate, so that the fatigue life of the track plate is prolonged. The ballastless track-structured waterproof vibration-reducing flexible protecting structure is a long-lasting protection scheme.

The invention relates to a battery engine, comprising a battery box in which (N+1) serially connected batteries are installed, wherein the amount of working batteries is N, the (N+1) battery is a standby battery, the battery engine further comprises a data acquisition module and an intelligent control chip, the data acquisition module comprises (N+1) acquisition ICs having the same structure and function, each acquisition IC is respectively connected with an anode signal and a cathode signal of the (N+1) batteries in the battery box, and each acquisition IC is connected to the intelligent control chip in parallel. The battery engine can detect voltage, current and temperature of each battery in real time, so as to implement balanced discharge of each single battery, and avoid shortening the service life of the whole battery pack for the reason that the failure of the whole battery pack is caused by premature failure of some single battery; and each battery pack is provided with a (N+1) single battery as a standby battery, so that trouble in changing batteries is avoided, and uninterrupted operation of electrical vehicles is ensured.

A seal for sealing a seal groove in a shroud of a turbine vane. The seal may include a cooling system configured to pass cooling fluids through a cooling fluid supply port in a shroud, through a cooling system in which the cooling fluids contact the shroud and the seal, and exhaust the fluids through a gap between adjacent turbine vanes. The seal may include an elongated cooling channel for channeling cooling fluids from a supply to an exhaust channel at a first end. The cooling system may remove heat from the turbine vane shroud, the seal, and other related components, thereby reducing the likelihood of premature failure.

An improved flue gas sensor of a combustion device is disclosed. The flue gas sensor may include a housing and a gas detector disposed within the housing, wherein the gas detector detects or measures at least one gas in a flue gas stream of the combustion device. The housing may also include a water barrier member through which the at least one gas comes into contact with the gas detector. By keeping water and water vapor away from the gas detector, premature failure of the flue gas sensor caused by corrosion may be prevented.

The invention relates to a clustering and multi-hop communication method of network nodes of a wireless sensor, in particular to a clustering and multi-hop communication method of a wireless sensor network based on a small-world model. The algorithm utilizes the small-world model to cluster the sensor network, which improves the clustering coefficient at the network side and enables that the sensor network has favorable performances of small-world network and large clustering coefficient; nodes in each cluster and average hop numbers are restricted so that the load of each cluster can be balanced; and the node with largest residual energy can take turns a cluster head so that the energy of all nodes can be oppositely balanced. The invention can balance the energy consumption of the networknodes in the whole situation, avoids the situations that the network is partitioned into a plurality of complementary connections as a part of nodes are premature failure, prolongs the life cycle ofthe whole network and improves the robustness of the network simultaneously.

The penetration of moisture and dirt often leads to a premature failure of electroacoustic miniature transducers that are used in hearing aids. A transducer membrane of a miniature transducer is provided at least in part with a hydrophobic and/or oliophobic and/or biofilm-inhibiting coating that, because its layer thickness is less than 10 μm, does not significantly influence the acoustic characteristic of the miniature transducer, and that prevents degradation of the transmission characteristic due to moisture, or moisture-caused damage to the miniature transducer. In addition, the adherence of dirt particles is prevented.