68results about How to "Improve long-term operational reliability" patented technology

The invention discloses a preparing method for a corrosion-resistant liquid cooling heat dissipation cold plate and aims at providing a cold plate preparing method which is free of tedious treatment before welding and has prominent corrosion-resistant capability and long-term work reliability. According to the technical scheme, the two sides of a bottom transverse pipe commonly communicated serve as the starting points respectively, two sets of parallel pipes are longitudinally arranged continuously in a bent manner, and the bending radius of bent circular arc rings on the two longitudinal sides is larger than the distance between every two parallel pipelines; the free ends of each set of parallel pipes are fixedly connected through respective connector flanges; and the two sets of parallel pipes are fixed, clamped and positioned through pipeline clamping tools which are longitudinally arranged at intervals, die positioning plates with screw holes are adopted, wax patterns wrapping runner titanium pipes and connector flange assemblies are clamped between the two die positioning plates, and the runner titanium pipes and the connector flange assemblies are put into a smelting furnace, and a rectangular flat plate is formed through lost foam casting. The preparing method solves the problem that during traditional cold plate welding, a welding seam is prone to cracking, and consequently a cooling agent leaks.

The invention discloses a test loop and an MMC power module thyristor overvoltage bypass test loop and a test method in a flexible DC power transmission small current starting stage. The test loop comprises a voltage regulator, a switch, a series resistor and a test accompanying module. The voltage regulator is used for being connected with a power supply, and the output end of the voltage regulator is connected with the series resistor in series and used for being connected with the test accompanying module and a tested half-bridge power module. The switch is arranged on a circuit between theoutput end of the voltage regulator and the series resistor; and the test accompanying module is used for enabling forward and reverse currents of the tested half-bridge power module to be consistentin size. The test method can simulate the working condition that the bypass switch refuses to operate in the small current starting charging stage in the actual engineering of the flexible direct current transmission system, and can judge whether the designed power module bypass thyristor can enable the power module to bypass reliably under the working condition or not.

The present invention discloses a main-slave dual-standby subglacial lake recoverable detector measurement and control system and method. The system comprises an upper computer, an on-ice carrier machine, a subglacial carrier machine, a RS232 concentrator, a main control panel and a slave control panel. The main control panel and the slave control panel are a main-slave relation at normal work, the slave control panel assists in collection of data, the main control panel takes on a role of 'main control' and is configured to control a winch and a heating control system and send the data collected by itself of the main control panel and the data collected by the slave control panel to the upper computer; and when the main control panel has faults, it is automatically switched that the slavecontrol panel takes on a role of 'main control' and is configured to control the winch and the heating control system and send the collected data to the upper computer. The main-slave dual-standby subglacial lake recoverable detector measurement and control system and method employ a main-slave dual-standby mode to perform detection of detector state information such as a temperature, a pressureand posture and perform gradient heating control and winch control so as to improve the long-term work reliability of a subglacial lake detector.

The invention discloses a refrigerator and an air duct plate of the refrigerator. The refrigerator comprises a refrigerator body which is internally provided with refrigerating chambers, door bodies installed on the refrigerator body and used for opening or closing the refrigerating chambers and an air duct arranged in the refrigerator body, wherein the air duct comprises the air duct plate, and silencing blind holes spaced to one another are formed in the inner wall face of the air duct plate. According to the refrigerator, due to the fact that the silencing blind holes are formed in the inner wall face of the air duct plate, noise can form resonance at peak frequency bands, so that the silencing coefficient and the sound resistance of the air duct plate are improved, and the sound absorption bandwidth is enlarged. In addition, the silencing blind holes formed in the inner wall face of the air duct plate are used for replacing silencing cotton to reduce fluid noise generated when air flow flows through the air duct plate, secondary noise brought by the silencing cotton is lowered, the problem that the air duct is blocked by ice due to water absorption of sound absorption cotton is effectively solved, the production cost is reduced, and the long-term operation reliability of the product is improved.

The invention discloses a preparation method of an electronic equipment liquid cooling pipe assembly. According to the preparation method of the liquid cooling pipe assembly, the remarkable corrosionresistance is achieved, the pressure resistance is high, and the long-term work reliability is high. According to the technical scheme, a nonmetal hose (2) with stainless steel braiding serves as a heat exchange runner, the two ends of the nonmetal hose (2) are inserted into sleeves (3) to be in butt joint with the end faces of tower-type step shafts of pipe connectors (1) fixedly connected to thetwo ends, and the nonmetal hose (2) and the tower-type step shafts form a whole in a mechanical buckling manner. In the preparation process, corresponding buckling parameters of buckling equipment are set according to the buckling amount, a buckling tool die and the buckling equipment are used, after manufacturing of a basic cooling pipe assembly is completed, the basic cooling pipe assembly is expanded into a cooling pipe assembly in a two-way, three-way, four-way even three-dimensional five-way pipe assembly structure manner through cooperation of a cooling pipe assembly adapter (12) with astandard interface (13).

The invention discloses a method for manufacturing a fast-recovery glass package diode with an ultra-high voltage above 13,000 V. The method comprises the steps that N type semiconductor silicon materials are adopted as a semiconductor substrate, N+ type impurities are doped on the N type semiconductor substrate, an N+ type impurity layer on one face of the semiconductor substrate is removed, P+ type impurities are dually doped on exposed N- type semiconductor materials, then heavy metal platinum doping is carried out, metallization layers on the two faces of a silicon wafer are manufactured through a vacuum coating technology, a plurality of chips are bonded to a pipe core assembly in a metallurgy mode, the silicon wafer is divided into pipe cores of the needed size, the divided pipe core assembly and a lead assembly are bonded through high-temperature sintering and metallurgy, glass passivation and packaging are carried out, adjusted glass powder paste coats the twelve pipe cores connected in series, and manufacturing of the glass package diode is completed. The method has the advantages of being high in voltage, small in forward direction, fast in reverse restoration, good in high-temperature work stability, high in long-term work stability and the like, and is widely applied to the field of aviation, aerospace, electronics, weapons, ships and the like.

The invention aims to provide a flow detection electronic device combining a power supply line and a communication line. According to the device, software is not used, but hardware logic controlled integrated circuit chips are used as core control components. The flow detection electronic device comprises a power supply, a clock circuit, a power-on reset circuit, an input filter protection circuit, a stand-by battery, a diode, a power filter electrolytic capacitor, an input resistor, an input interface, two reed pipes, a flow detection special integrated circuit, a reed pipe filter circuit, a gate control circuit, a line detection circuit, a battery detection circuit and a communication receiving and transmitting circuit, wherein the clock circuit, the power-on rest circuit, the input filter protection circuit, the reed pipe filter circuit, the gate control circuit, a line detection circuit, the battery detection circuit and the communication receiving and transmitting circuit are connected with the flow detection special integrated circuit respectively; the reed pipe filter circuit is also connected with the two reed pipes; the battery detection circuit is also connected with the power supply; and the communication receiving and transmitting circuit is also connected with an input end.

The invention discloses a double single-ended pumped two-rod series connection solid state laser. The double single-ended pumped two-rod series connection solid state laser comprises a first laser crystal, a first semiconductor laser pump source, a first pump light recycling device, a first thermal compensation negative lens, a second laser crystal, a second semiconductor laser pump source, a second pump light recycling device and a second thermal compensation negative lens; the first semiconductor laser pump source and the first pump light recycling device are formed into an excitation device of the first laser crystal; the second semiconductor laser pump source and the second pump light recycling device are formed into an excitation device of the second laser crystal. The double single-ended pumped two-rod series connection solid state laser has the advantages of improving the luminous efficiency of the laser due to the fact that pump light through the laser crystals is recycled through the pump light recycling devices; further improving the output power and stability of the laser due to the fact that compensation is performed on the thermal lens effect of the laser crystals through the thermal compensation negative lenses; achieving high-efficiency and high-output-power stable operation of the solid state laser.

The invention provides a downhole repeater power supplying device. The downhole repeater power supplying device is characterized in that firstly, the repeater power supplying device supplies a groundhigh-voltage direct-current power supply to a downhole repeater, then the ground high-voltage direct-current power supply is converted into a low-voltage direct-current power supply by the repeater tobe used by intelligent injection allocation devices, the downhole repeater is mounted on the upper part of the intelligent injection allocation device on the uppermost layer, the downhole repeater isconnected with a ground control system and the intelligent injection allocation devices, and the ground high-voltage direct-current power supply is firstly supplied to the downhole repeater and thenis converted into the low-voltage direct-current power supply by the repeater to be used by intelligent injection allocation devices. According to the downhole repeater power supplying device, the ground high-voltage direct-current power supply is firstly supplied to the downhole repeater and then converted into the low-voltage direct-current power supply by the repeater to be used by intelligentinjection allocation devices, and thus the long-term working reliability of an intelligent injection allocation device system is improved.

The invention relates to a high-frequency high-voltage alternating-current power circuit with the adjustable frequency, amplitude, and power. A regulation voltage rectification filter and power sampling circuit is connected with a main control and drive circuit, an alternating-current output frequency control and drive circuit, an alternating-current output power setting and overload protection circuit, and an alternating-current output voltage amplitude setting and feedback circuit; an alternating-current output and current sampling circuit is connected with the alternating-current output frequency control and drive circuit, the alternating-current output power setting and overload protection circuit, and the alternating-current output voltage amplitude setting and feedback circuit; the main control and drive circuit is connected with alternating-current output power setting and overload protection circuit and the alternating-current output voltage amplitude setting and feedback circuit; and a power input is connected with the main control and drive circuit and the alternating-current output frequency control and drive circuit. According to the invention, the high-frequency high-voltage alternating-current power circuit having a simple principle can be controlled conveniently; a physical power supply corresponding to the circuit has a small size and multiple functions can be provided; the long-term working reliability is high; and thus the physical power supply can be used by users conveniently.

The invention relates to a method for preparing a self-cleaning protective film of a solar cell, which comprises the following steps of: (1) performing hydrolytic polycondensation on tetraethoxysilane, deionized water and ethanol serving as raw materials in a volume ratio of 8-12:4-6:40-50 in the presence of hydrochloric acid serving as a catalyst at the temperature of between 68 and 75 DEG C, and adding EuCl3.6H2O in the reaction process for doping; (2) washing a glass substrate for multiple times with a detergent and the deionized water, putting the glass substrate into absolute ethyl alcohol to perform ultrasonic cleaning for 15 minutes, and drying the cleaned glass substrate at the temperature of 50 DEG C for later use; and (3) coating a film on the substrate at room temperature with a spin coater to obtain the required protective film. The method has a simple process; and the prepared film has super-hydrophilic property, and can effectively improve the transmittance and surface hardness of cover glass within the visible light range, have self-cleaning and physical protection functions on the solar cell, and prolong the service life of the solar cell.

The invention discloses a continuous halving double-antipodal-type magnetic system permanent magnet high-gradient strong magnetic separation device. A rotating shaft is used as the center of the device, and the mode of symmetrically arranging magnet yokes of the same magnetic system is adopted to form complete machine front-back symmetrical magnetic poles of the antipodal-type structure. The radial center plane of a magnetism gathering medium barrel is used as a symmetry plane to form left-right halving-type symmetrical magnetic poles of the antipodal-type structure. The structural style of apolygon magnetism gathering medium barrel is adopted in the magnetism gathering medium barrel, and an inner cavity of the magnetism gathering medium barrel is divided into four regions with the same area symmetrically at the two sides of a perpendicular bisector of the magnetism gathering medium barrel in the length direction. Magnetism gathering media are symmetrically installed in the regions atthe two ends of the inner cavity of the magnetism gathering medium barrel, and the adjacent regions at the two sides of the perpendicular bisector refer to magnetism gathering medium-free regions. Square permanent magnets are adopted as the magnetic poles, and five-face square extrusion soft iron materials at the upper side, the lower side, the left side, the right side and the tail portion serveas the magnetic poles. The square soft iron materials are further used as magnetic pole guide magnetic force lines. The square soft iron magnetic poles with the five faces being extruded are symmetrically arranged to form the antipodal-type structure.

The invention relates to a preparation method for a light anti-reflection protective film of a space solar cell, which comprises the steps of: (1) taking ethanol, deionized water and tetraethoxysilane with the volume ratio of (40-45): (5-6): (9-12) as raw materials and hydrochloric acid as catalyst, carrying out hydrolysis polycondensation reaction at 65-75 DEG C, fully mixing and standing to prepare a coating film; (2) cleaning a substrate with acid and alkali, washing with the deionized water, then placing in the anhydrous ethanol for ultrasonic cleaning and drying for use; and (3) coating the substrate with a spin coating machine at room temperature, placing the substrate in a muffle furnace for baking after coating and cooling the coated substrate along with the furnace to obtain the light anti-reflection protective film of the space solar cell. The preparation method has simple process and low cost, and the prepared protective film has the advantages that the overall weight of a space solar cell assembly is reduced, the transmittance of cover glass is improved, the service life of the cell is obviously prolonged, the long-time working reliability is improved, and the protective film has essential practical significance.

The invention belongs to the field of white light LED packaging, and particularly discloses a three-dimensional high-thermal-conductivity white light LED and a production method thereof. The three-dimensional high-thermal-conductivity white light LED comprises a substrate, a light reflection cavity, an LED chip and a three-dimensional high-thermal-conductivity fluorescent colloid. The light reflection cavity is installed on the substrate, the LED chip is located in the light reflection cavity and fixed to the surface of the substrate, and the LED chip is connected with a lead component; and the three-dimensional high-thermal-conductivity fluorescent colloid is filled in the reflection cavity and covers the LED chip, and the three-dimensional high-thermal-conductivity fluorescent colloid is composed of a three-dimensional high-thermal-conductivity framework and quantum dot colloid filled in gaps of the three-dimensional high-thermal-conductivity framework. Light energy can be smoothly emitted from the three-dimensional high-thermal-conductivity framework, the luminous efficiency of a white light LED is guaranteed, meanwhile, the working temperature of the fluorescent colloid is reduced, the long-term reliability is improved, and the LED has a wide application prospect.

The invention discloses a charging control method of an STATCOM (Static Synchronous Compensator) system. The method is applicable to a major loop structure of a three-phase chained H-bridge cascading submodule. The method comprises the steps of selecting first N submodules with highest voltage in a periodic task and issuing an IGBT (Insulated Gate Bipolar Transistor) bypass command to allow no charging of the submodules and allow charging of other submodules in a power grid; comparing voltage of the submodules with average voltage upper limits of the submodules after the voltage of the in-phase submodules tends to be balanced; issuing the IGBT bypass command to the submodules when the voltage of the submodules is greater than or equal to the average voltage upper limits of the submodules; and keeping a control command constant when the voltage of the submodules is less than the average voltage upper limits of the submodules. The method effectively reduces IGBT switching frequency of the submodules on the basis of realizing voltage balance of the in-phase submodules, reduces switching loss of a device, and improves long-time running reliability of the STATCOM system.