36 results about "Long gap" patented technology

The present invention discloses a cold plate with vortex generator for fluid going through defined an inlet and an outlet according to the flowing directions of the fluid, comprising: a base having a groove, one end of the groove is connected to the inlet and another end is connected to the outlet; a body installed on the base; at least one vortex generator mounted on a surface of the body toward the groove of the base, wherein two unparallel and symmetrical ribs form the vortex generator, one end of the unparallel ribs is a contraction end with a shorter gap, another end is an expansion end with a longer gap, coolant can pass through the gap between the ribs, due to each rib having a sharp portion, an appearance of the rib is a triangle geometric figure. The vortexes increase the liquid mixture and improve the heat transfer on the cold plate, but not cause much pressure drop, therefore the heat transfer of the entire system is more efficient.

Provided is a method for measuring temperature of long-gap air arc plasma, relating to heat plasma temperature measurement field. The method is based upon spectrum diagnosis principle of air arc plasma radiation, shooting long-gap air arc image through an attachment double-narrow-band-pass filter and a calibrated color CCD high speed image acquisition system, and storing in BMP format which data is not compressed; correcting pixel value of arc color bitmap file responded with two feature center wavelengths to original data of arc radiation intensity; obtaining arc radial light intensity distribution through Abel transformation, then calculating arc plasma projection temperature distribution or arc plasma temperature radial distribution by a colorimetry of spectrum relative intensity, and rebuilding tridimensional temperature field. The method of the present invention can measure open arc plasma temperature in air of several meters accurately and provides an important plasma parameter for researching microcosmic mechanism of long-gap air arc.

The invention discloses a circuit for triggering a two-gap plasma jet apparatus. The circuit for triggering the two-gap plasma jet apparatus comprises a pre-ionization circuit and a main discharge circuit, wherein the pre-ionization circuit pre-ionizes a short gap channel of the two-gap plasma jet apparatus, and then the main discharge circuit discharges to the short gap channel to form plasma jetting and enables a long gap channel of the two-gap plasma jet apparatus to be sparked over and punctured in succession so as to produce a long electric arc running through a sparkover channel of the two-gap plasma jet apparatus. The pre-ionization circuit pre-ionizes the short gap channel in an early stage of discharge, accordingly the charging voltage of a main discharge capacitor is reduced greatly, 1-3kV of voltage can be reduced, and the safety and the reliability of the whole discharge circuit are improved.

The invention discloses a long air spark gap ignition mechanism. The long air spark gap ignition mechanism is characterized in that a high-energy plasma ejection device is mounted on one electrode column of the spark gap. The plasma ejection device comprises a high-voltage electrode, an intermediate-voltage electrode and a low-voltage electrode, wherein the intermediate-voltage electrode divides a flashover gap channel into a short gap channel and a long gap channel; and the intermediate-voltage electrode and the low-voltage electrode are connected an inductor therebetween to serve as a voltage division unit and an energy storage unit of a discharge circuit. The inductor is used as the voltage division unit at the initial discharge period, and then is used as the energy storage unit to achieve follow current of long gap channel arc after the energy of a discharge capacitor is released completely. The plasma ejection device can stably eject a large amount of plasma under lower discharge voltage multiple times, and the plasma ejection speed exceeds sound velocity by multiple times. The plasma ejection device can be used repeatedly with substantially no performance change after repeated ejection, and can reliably ignite and breakdown the long air spark gap.

A low-cost and highly-conductive nano-carbon material preparation method comprises: selecting a gaseous or gasifiable carbonaceous feedstock as a carbon source, using carrier gas to carry the feedstock, splitting and generating a nano-carbon material in a plasma generator; using low temperature and high temperature plasma, wherein alternating current multi-electrode combined discharging and direct current multi-electrode combined discharging are combined, a high-voltage small-current mode is applied to alternating current, a low-voltage large-current mode is applied to directly current, and a long-gap-discharge mode is applied; in the plasma generator, high airspeed airflow passing through an arc with the dwell time being short; a reaction product enters a thermally insulated fluidized-bed reactor in which the reaction product stays for 10 seconds to 120 minutes; using a cyclone separator and a filter pocket to collect reactants, so that the carrier gas and partial feed gas that is not cracked can be recycled. If the feed gas needs to be cracked more thoroughly, the feed gas may enter into a second or a third plasma reactor, to obtain the nano-carbon material of low cost, high dispersion, high graphitization and superconductivity.

A heavy radial neutron reflector for a pressurized water reactor that employs elongated lengths of round bar stock closely packed in either a triangular or rectangular array extending between former plates of a core shroud between the core barrel and the baffle plates which outline the periphery of the reactor core and are formed in axial and circumferential modules. Flow channels are formed in the long gaps between the adjacent round bar stock that communicates cooling water that enters through the core barrel at the top of the shroud and flows down through openings in the former plates to the bottom of the neutron reflector where it exits through a lower baffle orifice to join other cooling water flowing up through the lower core support plate.

The invention discloses a device and a method for measuring high-energy electrons and electromagnetic radiation under long gap discharge, which belong to the technical field of long gap discharge. Thedevice of the invention includes a discharge experiment part and a detection part. The discharge experiment part includes an impulse voltage generator, a voltage divider and a needle-plate dischargestructure. The detection part includes a scintillator probe group, a DC power supply, a linear amplifier, a multi-channel analyzer, a processor, a run-away electron beam collector and an oscilloscope.The device and the method have the characteristics of simple structure and low cost, can ensure smooth conduction of experiment, can be used to guide insulation protection under lightning overvoltageand impulse overvoltage, and can bring great economic benefits. The device and the method can improve the accuracy of space-time characterization of long gap discharge, and are helpful to promote thebasic theoretical research about long gap discharge.

The invention discloses a dismounting device for double shaft sleeves of a civil aircraft oil combustion part. The dismounting device comprises a fixing support, a jacking device and two sets of pullers; the fixing support is provided with a top plate and a bottom plate, and the top plate is provided with a lifting mechanism; the jacking device comprises a panel, the middle of the panel is provided with a threaded rod through hole matched with the lower end of a threaded rod, through holes symmetrically formed in the two sides of the threaded rod through hole, and two lifting bolts are assembled in the through holes, wherein the diameter of the bolt heads of the lifting bolts is larger than that of the through holes for the lifting bolts; each puller comprises a circular pipe and a jacking rod, wherein a threaded hole serves as an inner hole formed in the upper end of the circular pipe, the pipe wall of the lower end of the circular pipe is evenly provided with a plurality of axial long gaps, a tapered opening serves as a hole opening of an inner hole formed in the lower end of the circular pipe, a rolling ball of which the diameter is larger than that of the small end of the tapered opening is assembled in the tapered opening, the lower end of the jacking rod penetrates into the inner hole of the circular pipe to abut against the rolling ball, the upper end of the jacking rod is provided with an outer threaded in a lathing mode, the outer thread is matched with the threaded hole formed in the upper end of the circular pipe, the topmost end of the jacking rod is provided with an axial threaded hole which is in thread fit with the corresponding lifting bolt, and the outer surface of the jacking rod is provided with knurls convenient for hand screwing. According to the dismounting device, the double shaft sleeves of the civil aircraft oil combustion part can be dismounted on the condition that a shell is not collided and scraped and shell and shaft sleeve damage is not caused.

The invention relates to an overhead design for a fuel-cell generator of a bus, which is airy, dustproof and rainproof. The fuel-cell generator is arranged on the top of the bus and a sheet metal of a vehicle shell on the top of the generator is designed to be a louver shape. The louver comprises multiple sets of single sheets; thereof the single sheet consists of a sheet and a groove connected with the lower part of the sheet. A narrow and long gap is arranged among the grooves and a dustproof net is arranged under the grooves. The vehicle shell at the both sides of the louver is provided with a plurality of intakes which can also be designed to be the louver shape; thereof an obtuse angle is formed between the sheet direction and the running direction to prevent the rainwater enters when the car is running. The dustproof net is arranged inside of the intakes. Compared with the prior art, the invention can not only cover and protect a coping of the bus but also play an airy, dustproof and rainproof role.

The invention relates to the thunder detection technology, in particular to a method for calibrating a long-gap discharge sound source transient response amplitude of a thunder monitoring sensor. According to the calibration method, the long-gap discharge sound source transient response amplitude of the thunder monitoring sensor is calibrated by using the transient discharge process of a charge breakdown long-gap needle electrode of an impulse voltage discharge system to simulate the natural thunder activity discharge process with long physical size, high voltage and powerful electromagnetic radiation, the space-time randomness of thunder discharge activities is simulated by adjusting four variables including gap length of long-gap discharge as well as a detection distance, an azimuth angle and an elevation angle of the sensor, the transient response amplitude of the thunder monitoring sensor is systematically calibrated, and a basis is provided for monitoring of natural thunder sounds. According to the method, the high-voltage and long-physical-size thunder discharge process is simulated through long-gap discharge in a laboratory, and the method is used for calibrating the long-gap discharge sound source transient response amplitude of the thunder monitoring sensor and provides a basis for quantitative monitoring of the thunder monitoring sensor.

The invention relates to a cutting method for detecting lateral bending residual stress of H-shaped steel. The cutting method is characterized in that a 500 mm long section of detected H-shaped steel is cut and taken as a testing piece, a 400 mm long gap is longitudinally sawed in the center position of a web at one end of the testing piece, and residual stress is released. The cutting method has the advantages of simplicity and convenience in operation, accuracy improvement, loss reduction and cost saving.

It has been known that the use of a positive column produced by long-gap discharge is the most promising approach of achieving a high luminous efficiency which is the most important problem of conventional PDPs. However, it has been impossible to generate an adequate positive column by means of conventional electrode structures. To ensure generation of long gap discharge, a discharge-type display device is constituted such that a trigger discharge section is provided near its main discharge electrode, and an intermediate section connecting the trigger discharge section and the main discharge section is disposed outside the screen or behind the limb, thus preventing discharge in the intermediate section and realizing only small trigger discharge and positive-column-type main discharge of high luminous efficiency.

A plasma display apparatus is provided. Polygonal discharge cells are arranged in delta. Extension parts are extended from pairs of sustain electrodes that apply a voltage to the discharge cells to discharge spaces to face each other. Since the extension parts have at least one depressed parts, the efficiency of sustain discharge improves due to a long gap. Since the width of data electrodes formed under the discharge cells is large in the discharge spaces, a distance between the effective side surfaces of the pairs of sustain electrodes and the data electrodes is reduced so that the efficiency of address discharge improves.

The invention discloses a high-efficiency automatic magnetism protecting ring assembling machine. The assembling machine comprises a rack, wherein a magnetism protecting ring feeding device is arranged on the rack, the magnetism protecting ring feeding device is connected with a magnetism protecting ring detection device, the magnetism protecting ring detection device comprises a sliding groove, amagnetism protecting ring moving component is arranged beside the sliding groove, a long gap detecting component, a first rotating component, an inner convex detecting component and a first turning component are sequentially arranged beside the sliding groove according to the moving direction of a product, the tail end of the magnetism protecting ring detecting device is connected with a motor feeding component, the motor feeding component is connected with a pressing fitting component, and the pressing fitting component is connected with a conveying component. The assembling machine has theadvantages of high assembly efficiency.