237results about How to "Avoid premature failure" patented technology

A photocontroller diagnostic system including a photocontroller with a sensor for determining the presence of daylight, and a relay, responsive to the sensor, for de-energizing a lamp during periods of daylight. The diagnostic subsystem is responsive to the photocontroller, and includes a microprocessor programmed to verify the operability of the relay and / or the sensor and programmed to transmit a signal representative of the operability of the relay or the sensor.

A method for operating a wind power plant which is provided with a device for regulating the speed of a rotor of the wind power plant. The method includes the steps of: determining the critical frequency of the respective turbine and / or turbine components, determining the speed range of the rotor in which the entire turbine and / or individual turbine components are excited in the vicinity of their critical frequencies and operation of the wind turbine plant only below and above the critical range; the latter being traversed rapidly.

The invention provides a method for preparing and applying a single orientation Cu6Sn5 intermetallic compound micro-interconnecting welding point structure. The method for preparing the single orientation Cu6Sn5 intermetallic compound micro-interconnecting welding point structure comprises the first step of arraying a Cu welding disc on a wafer through the electroplating technology, the second step of manufacturing bosses by preparing brazing filler metal prepared on the Cu welding disc, the third step of carrying out hot-wind remelting on the manufactured bosses for 30s-120s, the fourth step of carrying out solid-phase aging processes on chips obtained in the third step, the fifth step of placing the welding point bosses prepared in the fourth step into hydrochloric acid, oscillating the welding point bosses through ultrasound, washing and drying the welding point bosses to obtain a preferred orientation Cu6Sn5 welding disc, the sixth step of reversely buckling the welding point bosses prepared in the fifth step into a corresponding circuit board Cu metal layer, and obtaining the single orientation Cu6Sn5 intermetallic compound micro-interconnecting welding point structure through the reflow welding technology. Uniform and stable welding point structure can be obtained when the single orientation Cu6Sn5 intermetallic compound micro-interconnecting welding point structure is applied to large two-level packaging at the appropriate conditions.

A bumper system includes a “W” or “C” shaped beam having a back wall and mounts along the back wall adapted for attaching the beam to rails of a vehicle frame. An energy absorber engages a face of the beam and has rearwardly-extending energy-absorbing sections that extend through the face into contact with the back wall at each of the mounts for improved energy absorption. The horizontal walls of the beam have front and rear sections that align, but also have a U-shaped intermediate section that weakens the walls for promoting a more uniform and predictable collapse. A one-piece brace includes diagonal straps that hold free ends of top and bottom walls together to prevent premature spreading apart upon impact. The energy absorber includes energy-absorbing sections that extend past the straps to detentingly engage the intermediate sections of the beam.

A tube-type vortex reducer conducts cooling air in a compressor (1) of a gas turbine. Radial secondary air tubes (2) are arranged in a disk interspace (5) and attached to a compressor disk (3) with their radial outward end sections. The end sections of the secondary air tubes (2) are attached to a separate carrier ring (6), which is connected to a compressor disk (3).

An integrated optoelectronic circuit chip for optical data communication systems includes a silicon substrate, at least one MOS field effect transistor (MOSFET) formed on a portion of the silicon substrate, and an avalanche photodetector operatively responsive to an incident optical signal and formed on another portion of the substrate. The avalanche photodetector includes a light absorbing region extending from a top surface of the silicon substrate to a depth h and doped to a first conductivity type. The light absorbing region is ionizable by the incident optical signal to form freed charge carriers in the light absorbing region. A light responsive region is formed in the light absorbing region and extends from the top surface of the silicon substrate to a depth of less than h. The light responsive region is doped to a second conductivity type of opposite polarity to the first conductivity type. The light absorbing region and the light responsive region form a P-N junction at the interface therebetween such that when the light absorbing and light responsive regions are appropriately reverse biased, the freed charge carriers in the light absorbing region are amplified by avalanche multiplication.

The present invention relates to a corrosion-resistant high-toughness zinc-magnesium alloy implanting material capable of being absorbed by human body. The alloy material comprises 96-99.998 wt% of Zn and 0.002-4 wt% of Mg. According to the present invention, the alloy material of the present invention is applied for the absorbable medical implant, particularly the vascular stent and the orthopedic implant (bone nail or bone plate and the like); the prepared zinc-magnesium alloy material of the present invention can be absorbed in the human body environment, such that the pain of the secondary surgery on the patient can be avoided; the corrosion resistance of the prepared zinc-magnesium alloy material is much higher than the corrosion resistance of the magnesium alloy, the degradation speed is substantially reduced, and the long-term mechanical support can be provided, such that the failure of the vascular stent, the bone nail and other implants in advance can be avoided; and the mechanical strength of the prepared zinc-magnesium alloy material is much higher than the mechanical strength of the polymer, and the prepared zinc-magnesium alloy material has characteristics of high toughness, easy manufacturing, good elastic modulus matching with human body, and simultaneous high corrosion resistance and high toughness achieving.

The present invention is directed to fluid compensated downhole connectors and connection systems employing an intensified dielectric fluid compensation. Also disclosed is a permanent downhole fluid compensated electrical connector assembly employing an intensified dielectric fluid compensation. The present disclosure is also directed to a field bypass connector system for a downhole completion tool, such as a packer, and a retrievable wet connect system also employing intensified dielectric fluid compensation.

The invention discloses a rust-proof soft film composition and a preparation method thereof, belonging to the technical field of metal protection and particularly relating to a metal rust preventing technology. The rust-proof soft film composition disclosed by the invention comprises the following components in a formula in percentage by mass: 40-70 of film forming agent, 2-10 of corrosion and rust inhibitor, 1-5 of vapor phase inhibitor, 4-10 of microcapsule antirust agent, 0-10 of pigment, 1-3 of rheological agent, 0.2-1.0 of defoaming agent and 10-25 of solvent. The rust-proof soft film composition disclosed by the invention has an excellent rust-proof effect and an excellent self-repairing function; rust-proof gas volatilized by the film can meet the rust-proof requirements of inner and outer surfaces of workpieces with complex structures such as inner metal cavities, inner walls of pipelines, grooves and the like; when the rust-proof soft film is destroyed in a use process, a rust-proof core with an excellent self-repairing function of the microcapsule antirust agent can be automatically repaired, so that the condition that the rust-proof film is invalid in advance because of being destroyed is avoided, and the protection time of a protective film is prolonged; and the rust-proof soft film composition can comprehensively meet the requirement for metal rust-proof protection under severe environments such as outdoor sun and rain, sand-dust and the like.

The invention provides a tin-radical welding flux / copper particle composite welding flux capable of forming high-temperature welding spots rapidly at a low temperature. The tin-radical welding flux / copper-particle composite welding flux is composed of tin-radical welding flux powder, copper particle powder and welding paste, wherein the weight ratio of the tin-radical welding flux powder and the copper-particle powder lies between 5:2 and 2:3, the weight ratio of the remaining welding paste is 4%-20%, the particle size of the tin-radical welding flux powder is preferentially from 5 micrometers to 60 micrometers, and the particle size of the copper particle powder is from 0.1 micrometer to 10 micrometers. By means of the tin-radical welding flux / copper particle composite welding flux, the characteristics of a low melting point of the tin-radical welding flux and good wetting reaction of tin-copper are utilized, the high-melting intermetallic compound (IMC) interconnection welding spots can be formed within a short moment at the low temperature and without any pressure, and the tin-radical welding flux / copper particle composite welding flux is applicable to leading wire interconnection of electronic devices when a high temperature is caused during the service process or which performs the service at the high temperature. According to the tin-radical welding flux / copper particle composite welding flux capable of forming the high-temperature welding spots rapidly at the low temperature, the technology is simple, the cost is low, the practicability is great, and the problems of high cost, long welding time and high welding temperatures in existing chip packaging materials are solved.

The invention discloses a method for recognizing lithological characters while drilling, which mainly solves the problems of unclear horizontal boundary and serious rock debris collection time delay of the conventional cutting logging method. The method is characterized in that: actually drilling different rock samples on the ground, recording vibration signal generated under a condition of the combination of a plurality of groups of typical drilling parameters, acquiring different drilling parameters and a standard frequency spectrum under the condition of the combination of lithological characters by using quick Fourier transform, and storing the different drilling parameters and the standard frequency spectrum in a database; setting an orthogonal three-axis acceleration sensor, a two-axis strain transducer and a gyroscope in the drill collar of a near drill bit; and string the data collected by the three-axis acceleration sensor, the two-axis strain transducer and the gyroscope during the drilling of the drill bit, comparing the spectrum of data with the standard frequency spectrum for analysis, extracting data on vibration type, main frequency, frequency doubling and the like to form lithological feature codes, vibration characteristic codes and drill bit health code, and determining the lithological characters. The method can realize while-drilling recognition and has high recognition effect.

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.

An integrated optoelectronic circuit chip for optical data communication systems includes a silicon substrate, at least one MOS field effect transistor (MOSFET) formed on a portion of the silicon substrate, and an avalanche photodetector operatively responsive to an incident optical signal and formed on another portion of the substrate. The avalanche photodetector includes a light absorbing region extending from a top surface of the silicon substrate to a depth h and doped to a first conductivity type. The light absorbing region is ionizable by the incident optical signal to form freed charge carriers in the light absorbing region. A light responsive region is formed in the light absorbing region and extends from the top surface of the silicon substrate to a depth of less than h. The light responsive region is doped to a second conductivity type of opposite polarity to the first conductivity type. The light absorbing region and the light responsive region form a P-N junction at the interface therebetween such that when the light absorbing and light responsive regions are appropriately reverse biased, the freed charge carriers in the light absorbing region are amplified by avalanche multiplication.

A cutting tool assembly mounted on a rotating drum and having a base block, a wear sleeve and a cutting bit wherein a seal is located between the base block and wear sleeve is disclosed. A fluid passage spans from the rotating drum to a discharge location between the wear sleeve and the shank of the cutting bit. The fluid lubricates the shank of the cutting bit and bore of the wear sleeve allowing the cutting bit to rotate freely within the wear sleeve. Rotation of the cutting bit promotes even wear and long life of the bit.

The present disclosure provides a tattoo machine including a frame, an armature bar coupled to a needle bar, at least one electromagnetic coil, and a dampening device disposed to the frame. The dampening device absorbs vibrational forces exerted on the frame of the tattoo machine and thereby helps minimize wear and tear as well as increases the longevity of the machine. The absorption of vibrational forces increases the comfort of the tattoo artist along with their accuracy.

The invention discloses a thermal spraying self-bonding metal alloy powder with a coated composite structure and belongs to the technical field of material processing. The metal alloy powder is composite structural powder formed by coating outer-layer metal and coated metal particles, the surfaces of the coated metal particles are uniformly coated with the coating outer-layer metal, a melting point of the coating outer-layer metal is higher than a melting point of the coated metal particles, the coating layer and the coated metal particles are metallurgically bonded to form the composite structural powder. When a metal alloy coating prepared by the composite structural powder is adopted, due to the fact that metallurgical bonding reaction occurs between the coating and a substrate and also occurs among particle layer interfaces in the coating, the interface bonding can be firm, accordingly the bonding strength between the coating and the substrate and the cohesion bonding strength of the particle layers in the coating are remarkably improved, and the long-term usage stability of the coating is ensured. The metal alloy coating prepared by the metal alloy powder has excellent corrosion resistance properties.

The invention discloses a tunnel pre-stressed restrained filling lining support system with yielding and energy-absorbing functions and a technology. The system includes multiple restrained filling lining bodies arranged along the circumference of a tunnel, and restrained yielding sleeves are connected between the restrained filling lining bodies. Each restrained filling lining body includes a restrained shell which has a filling body inside. Pre-stressed anchor bolts are installed in a penetrating manner along the outer arc surface and the inner arc surface of each restrained shell. A numberof anchor rope holes are arranged in the inner arc surfaces of the restrained shells. The pre-stressed anchor bolts are installed in a penetrating manner in the anchor rope holes by self-locking yielding trays. The pre-stressed anchor bolts are applied with a pre-stress and can produce radial compression on the restrained shells and the inner filling bodies thereof so that the pre-stressed anchorbolts, the restrained shells and the filling bodies constitute a composite bearing shell together. When the pressure on the external surrounding rock of the tunnel exceeds the yielding value set by the restrained yielding sleeves and the self-locking yielding trays, the whole lining support system can realize yielding and energy absorbing along the circumferential and radial directions of the tunnel.

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.

The invention relates to a magneto-rheological pump type variable-damping shock absorber suitable for various vehicle suspension systems. The shock absorber is provided with an outer cylinder barrel with packaged upper and lower sides, wherein a hydraulic working cylinder is arranged in the outer cylinder barrel; the working cylinder is internally provided with a piston with a circulating hole, a piston rod connected to the piston and a stopper; the lower port of the working cylinder is connected to a bottom valve seat; a guider and an oil seal base connected to the guider are connected to the upper port of the working cylinder; the guider is internally provided with one or more electromagnetic coils; a magneto-rheological liquid flow guide hood is arranged between the working cylinder and the outer barrel wall; a gap between the outer wall of the flow guide hood and the inner wall of the outer cylinder barrel forms an annular return oil channel; and a damping one-way valve is respectively arranged at the liquid flow channel openings of both the bottom valve seat and the piston. The shock absorber is internally filled with a magneto-rheological liquid, so that the yield stress of the shock absorber increases monotonically along with the enhancement of the magnetic field; due to the damping characteristic of the shock absorber, the shocker absorber can adapt to the needs of vibration damping performances of various road surface conditions through the adjustment of the intensity of the current in the coils, and particularly, can avoid impact of large-amplitude and strong vibration of a car on a rugged road. The magneto-rheological pump type variable-damping shock absorber has the advantages of a rational design, a simple structure, strong working reliability, good damping effects and long service life.

The invention discloses a degradable biomedical Mg-Zn-Zr-Nd alloy material and a preparation method thereof. Magnesium alloy comprises, by mass, 1-3% of Zn, 0.5-1% of Zr, 0.1-1.5% of Nd, and the balance Mg and inevitable impurities. The preparation method comprises the specific steps of raw material smelting, casting forming, homogenizing treatment, hot extrusion and artificial ageing treatment, and the biomedical magnesium alloy bar material meeting the service requirements under the biological fluid environment is obtained. According to the degradable biomedical Mg-Zn-Zr-Nd alloy material and the preparation method thereof, the alloy elements harmless to human bodies are added into the magnesium alloy, the alloy is non-poisonous to the human bodies after being degraded in the human bodies, is excellent in mechanical property, has good mechanical performance and machining performance, is good in corrosion resistance, can be completely degraded in the biological fluid environment and can also ensure the appropriate corrosion rate so that early failure can be avoided. The degradable biomedical Mg-Zn-Zr-Nd alloy material is simple in preparation method, low in production cost and suitable for being made into a cardiovascular stent, a bone nail and other medical materials.

The invention relates to a junction box for solar panels, with which the heat produced in the protecting diodes, MOSFETs or other corresponding power semiconductors of a solar panel can be reliably dissipated. In the junction box, the electronic components are pressed against the housing (1) or into recesses (3) corresponding to the geometry of the components by means of pressure elements, and electrical isolation, preferably a thermally conductive silicone rubber, is provided between the housing (1) and the components.

An energy absorber for use in a personal fall arresting system wherein a pair of webbing are held together by tear away binder elements which are arranged to rupture under controlled conditions to prevent failure of the absorber when experiencing high load conditions.

The invention discloses a water and air double-cooled hydraulic cylinder which comprises a water cooled jacket, a cylinder body, a piston rod, a cylinder sealing cover, an air cooled end cover and a cylinder shaft end sealing cover, wherein the water cooled jacket is a hollow cylinder, and a water inlet and a water outlet for injecting and discharging cooling water are arranged on the water cooled jacket; the cylinder body is arranged in the water cooled jacket; the piston rod makes reciprocating movement in the cylinder body; the cylinder sealing cover is used for sealing one end of the cylinder body, hydraulic fluid is injected into the cylinder body and discharged from the cylinder body through a fluid inlet and a fluid outlet on the cylinder sealing cover; the air cooled end cover is arranged at the end part of the water cooled jacket opposite to the cylinder sealing cover so as to seal the end part of the water cooled jacket, and an air inlet is arranged on the air cooled end cover; and the cylinder shaft end sealing cover is inserted into the air cooled end cover to seal the other end of the cylinder body, and an air outlet hole is arranged in the cylinder shaft end sealing cover. A cooling air diversion channel is formed between the air cooled end cover and the cylinder shaft end sealing cover, fluids in the air inlet and the cooling air diversion channel are communicated, and fluids in the air outlet hole and the cooling air splitting channel are communicated.

The invention relates to a motor stator which is used for the petroleum and natural gas well-drilling field and is matched with the screw drilling tool. The motor stator comprises a casing and a rubber bushing. The rubber bushing is bonded with the inner opening of the casing. The inner opening of the rubber bushing is of a continuous spiral type. The radial cross section is of a circumferential uniformly-distributed petal shape. The difference is that the wall thickness of the rubber bushing at the radial cross section is not even. The wall thickness of each petal of the rubber bushing at the radial cross section from the lowest part of the dent to the highest part of the projection gradually increases. The largest thickness is 1.2-2 times of the smallest thickness. The shape of each petal on the radial cross section is same,The motor stator of the invention not only can prevent the damage of the stator rubber caused by the easy blocking of the rotor in the stator and no easy discharge of the slurry pressure when an overgreat drilling pressure generates on the stator with same wall thickness, but also prevents the problem of over-early failure caused by the large wall thickness difference of the rubber bushing and easy heat accumulation to the part with thick rubber. Therefore the advantages of greatly increasing the efficiency of the motor stator and effectively prolonging the service lifetime are obtained.

An energy absorber for use in a personal fall arresting system wherein a pair of webbing are held together by tear away binder elements which are arranged to rupture under controlled conditions to prevent failure of the absorber when experiencing high load conditions.