41results about How to "Efficiency unchanged" patented technology

The invention discloses an estimation method for radiator efficiency of an oil-immersed power transformer. The estimation method comprises the following steps: calculating average load loss of a to-be-estimated transformer in a specified period of time and adding nameplate no-load loss to the average load loss to obtain average total loss power; calculating average after-power of the to-be-estimated transformer in the specified period of time; supposing the radiator efficiency of the to-be-estimated transformer, calculating average radiating power of a radiator of the to-be-estimated transformer in the specified period of time; subtracting the average after-power from the average total loss power and dividing by the average radiating power to reversely calculate the radiator efficiency of the to-be-estimated transformer according to the energy consumption balance relationship that the difference of the average total loss power and the average radiating power is equal to the average after-power. According to the estimation method, the calculation of the radiator efficiency can be realized to master the loading capacity of the transformer so as to solve the problem of insufficient radiator efficiency of the transformer; the estimation method adapts to the transformer provided with the radiator, and can also provide a basis for calculating the temperature rise of top oil of the transformer.

The invention discloses a motor and a motor stator. The stator comprises a stator core and a varnished wire, wherein the stator core comprises a polygonal shape yoke part and multiple stator teeth, multiple installation and position holes are formed on the yoke part and peripherally spaced, a stator slot is defined between each two adjacent stator teeth, the minimum distance between the bottom of the stator slot and the peripheral wall of the corresponding yoke part is H1, the minimum distance between the inner wall of any one installation and position hole and the bottom of the nearest stator slot is H2, the minimum predetermined thickness of the yoke part is H0, H1, H2 and H0 are equivalent, and the stator slot comprises a first stator slot and a second stator slot both which are different in slot shape; the varnished wire passes through said multiple stator slots and is wound on said multiple stator teeth. According to the stator, the effective area of the stator slot is increased.

The invention discloses an estimation method for cooler efficiency of an oil-immersed power transformer. The estimation method comprises the following steps: calculating average load loss of a to-be-estimated transformer in a specified period of time and adding nameplate no-load loss to the average load loss to obtain average total loss power; calculating average after-power of the to-be-estimated transformer in the specified period of time; supposing the cooler efficiency of the to-be-estimated transformer, calculating average cooling power of a cooler of the to-be-estimated transformer in the specified period of time, and subtracting the average after-power from the average total loss power and dividing by the average cooling power to reversely calculate the cooler efficiency of the to-be-estimated transformer according to the energy consumption balance relationship that the difference of the average total loss power and the average cooling power is equal to the average after-power. According to the estimation method, the calculation of the cooler efficiency can be realized to master the loading capacity of the transformer so as to solve the problem of insufficient cooler efficiency of the transformer; the estimation method adapts to the transformer provided with the cooler, and can also provide a basis for calculating the temperature rise of top oil of the transformer.

The present invention discloses a radio frequency power amplification circuit. The radio frequency power amplification circuit comprises a first switch group, a second switch group, an impedance switching unit, a third switch, a fourth switch and a fifth switch; one terminal of the first switch group is connected with one differential input terminal of the circuit, and the other terminal of the first switch group is connected with a first balanced differential port of the impedance switching unit; one terminal of the second switch group is connected with the other differential input terminal of the circuit, and the other terminal of the second switch group is connected with a second balanced differential port of the impedance switching unit; one terminal of the third switch is connected with a power supply, and the other terminal of the third switch is connected with the first balanced differential port of the impedance switching unit; one terminal of the forth switch is connected with the power supply, and the other terminal of the fourth switch is connected with the second balanced differential port of the impedance switching unit; one terminal of the fifth switch is connected with a center tap port of the impedance switching unit, and the other terminal of the fifth switch is connected with the power supply; and impedance conversion of the impedance switching unit is controlled through on or off of the first switch group, the second switch group, the third switch, the fourth switch and the fifth switch.

The invention relates to the technical field of photovoltaic modules, in particular to blue cover plate glass for photovoltaic building integration and a preparation method of the blue cover plate glass. The blue cover plate glass for photovoltaic building integration is composed of a glass substrate, a color layer and a protective layer which are arranged from bottom to top. A film layer materialof the color layer is one of or a mixture of more of SiO2, TiO2, ZnO, Si3N4, MgF2, SnO and Nb2O5, and the thickness of the film layer material is 80-200 nm; and the film material of the protective layer is one of or a mixture of more of TiN, ZrO2, ZrN, SiZrOx, SiZrN and SiZrON, and the thickness of the protective layer is 3-15nm. According to the blue cover plate glass for photovoltaic building integration, the reflection color value is sapphire blue, the blue cover plate glass is used for a photovoltaic solar cell, the solar light transmittance (380 nm-1100 nm) is larger than 85%, and the efficiency of the solar cell is basically unchanged; and the invention also provides a preparation method of the blue cover plate glass.

The invention discloses an optimization method for a low-pressure axial fan impeller blade. A low-pressure axial fan is widely applied, but the problems of low total pressure, large air volume and low impeller efficiency exist. According to the optimization method, the blade of a to-be-optimized impeller model is divided into n sections in the radial direction of the impeller, and the chord length bi, the outlet geometric angle beta 2A (i) and an inlet airflow angle beta1 (i) of the n sections are obtained. A sketch is drawn and comprises a first line segment, a second line segment, a third line segment, a fourth line segment, a fifth line segment, a sixth line segment, a first circular arc, a second circular arc, a seventh line segment and an eighth line segment. The first circular arc and the second circular arc form a novel line. According to the novel line, n new sections are obtained, and the optimized impeller model is obtained according to the n new sections. According to the optimization method, the performance of the low-pressure axial fan can be optimized only by knowing the chord length, the inlet airflow angle and the outlet geometric angle of the sections of the to-be-optimized blade, design time is shortened greatly, and cost is reduced greatly.

The invention provides a circuit and a method for synchronous rectification of a Jensen circuit. A secondary winding with a central tab is added to a driver transformer B1 to drive synchronous rectification MOS tubes Q1 and Q2 arranged in a secondary rectifier circuit; the magnet and the number of primary turns of the driver transformer B1 are optimized, the impedance of a feedback resistor is optimized, and the working voltage at the two ends of the primary side of the driver transformer B1 is changed into sine wave or approximate sine wave from the existing square wave; the turn ratio of the first and second secondary windings of the driver transformer B1 is adjusted according to the on voltages of the synchronous rectification MOS tubes so that the on time of the MOS tubes Q1 and Q2 is always smaller than the saturated on time of main power switch tubes TR1 and TR2, and therefore, the reverse current is eliminated; meanwhile, a main transformer B2 is excited during the period of both main power switch tubes TR1 and TR2 off by use of the sine wave in the driver transformer B1, and therefore, the main power switch tubes TR1 and TR2 are switched on under zero voltage and soft switching working is realized; as the synchronous MOS tubes are switched off firstly, the main power switch tubes are also switched off under zero current; the conversion efficiency is improved and the high reliability of the simple Jensen circuit is also maintained.

The invention discloses boron-nitrogen co-doped porous graphene as well as a preparation method and an application thereof. The method comprises the following steps of placing graphene in a reaction container, introducing water vapor and argon, and carrying out heating to perform heating treatment to obtain porous graphene; heating the porous graphene in a mixed atmosphere of NH3 and Ar to carry out nitrogen doping treatment to obtain nitrogen-doped porous graphene; and putting the nitrogen-doped porous graphene and boric acid into the reaction container, and heating in a protective atmospherefor boron doping treatment to obtain a boron-nitrogen co-doped porous graphene catalyst. According to the method, water vapor is used as a weak oxidizing agent, so that pore size regulation and large-scale preparation of the porous graphene are realized. The boron-nitrogen co-doped porous graphene catalyst provided by the invention shows excellent catalytic efficiency and catalytic stability, andhas a wide application prospect in the field of nitrogen catalytic reduction.

The invention relates to rotating compressor upper bearing. It includes bearing seat, axle sleeve, air outlet valve plate, and position limiting machine. The air outlet valve plate forms truncated cone which can ensure compressor efficiency, use diminishing aperture to reduce fluid noise while discharging secondary refrigerant, thereby increase product performance and quality.

The invention relates to the technical field of photovoltaic modules, in particular to yellow cover plate glass for photovoltaic building integration and a preparation method of the yellow cover plateglass. The yellow cover plate glass for photovoltaic building integration is composed of a glass substrate and a plurality of film interference color layers which are arranged from bottom to top. Thefilm material of the multi-layer film interference color layer is a plurality of materials selected from SiO2, TiO2, ZnO, Si3N4, ZrO2, MgF2, SnO2, Nb2O5, Al2O3, ZrN and AlN, and the total thickness of the multi-layer film interference color layer is 140 to 500 nm. According to the yellow cover plate glass for building integrated photovoltaics, by using the glass, a solar cell module can present ayellow appearance, and the efficiency of a solar cell is not obviously attenuated. The invention also provides a preparation method thereof.

The invention provides a data processing method and a data processing device, the method comprising: grouping data to be processed to generate a plurality of data sets; for each data group, reading all the data to be processed in the data group into the memory, and executing the dual data tasks in the data group based on all the data in the data group, and releasing the memory occupied by the datagroup after the dual data tasks in the data group are completed; and reading data of the two data groups into memory for each two data groups, executing dual data tasks between the two data groups based on the data in the two data groups, and releasing the memory occupied by the data after all the dual data tasks between the two data groups are completed. By increasing the I / O times and reducingthe amount of data read into the memory at one time, the application algorithm avoids the system or software crash caused by insufficient memory or too much task, and ensures the completeness of the task under the premise that the efficiency is basically unchanged.

The invention provides a gas power device. The gas power device comprises an air supply machine, rotating joints, a turbine, a gas pipe, an oil pipe and a rotating shaft; an air outlet of the air supply machine communicates with a gas inlet of the gas pipe after penetrating through the first rotating joint through a pipe; an external oil supply pipeline communicates with an oil inlet of the oil pipe after passing through the first rotating joint; an oil outlet of the oil pipe communicates with a pipeline of the gas pipe; and a gas outlet of the gas pipe communicates with an intake port of theturbine through a pipe after passing through the second rotating joint. The invention further provides a gas power method; oil enters the oil pipe; air enters the air pipe through the air supply machine; and after the oil and the air are mixed for combustion, power is outwards output after pressure energy is released from the turbine. The system structure is simple; and a simple pipeline is used for replacing a complicated impeller runner, so that higher efficiency is achieved under the condition of high pressure ratio, and the higher pressure ratio can be adopted.

The invention discloses a low-pressure gear pump and underwater vehicle power propelling device, and relates to the field of design of a novel marine vehicle power propulsion system. The device comprises a power component, a transmission component, a low-pressure gear pump component, a baffle and stopping block component and a connecting component. Two power propelling devices are arranged in an underwater vehicle in a crossed mode, and vector propulsion of a horizontal plane is achieved through forward and reverse rotation of a gear pump and the baffle and stopping block structure. The device has the advantages that the structure is simple, the manufacturing cost is low, the noise is small, the efficiency is not changed during vector forward and reverse propulsion, and the device is suitable for low-speed and small underwater vehicles.

The invention discloses a parallel-PSO-based maximum fault-tolerant frequent item set mining method. The parallel-PSO-based maximum fault-tolerant frequent item set mining method includes the steps: converting the target transaction database into a corresponding binary matrix; if the converted binary matrix is a sparse matrix, setting a minimum item support degree to delete the item which does notmeet the threshold value; initializing a particle swarm according to the matrix dimension; adding a Gaussian disturbance item into a speed updating formula of the particle swarm algorithm to preventthe population from falling into local optimum; according to the concept of the fault-tolerant block, designing a fitness function of a particle swarm algorithm, converting particles in a population into an RDD data set in a Spark platform, achieving a termination condition after iteration, and obtaining a maximum fault-tolerant block, wherein when the support degree of the fault-tolerant block islarger than a minimum support degree threshold value, an item set corresponding to the fault-tolerant block is a maximum fault-tolerant item set. The parallel-PSO-based maximum fault-tolerant frequent item set mining method improves the operation efficiency of the algorithm, guarantees that the efficiency of the conditional algorithm with different fault tolerance degrees in the same target transaction database is unchanged, and meanwhile has high performance for the sparse target transaction database.

This invention relates to a lyotropic liquid crystal solid-state polarizing film and preparation method thereof. Wherein, the preparation process comprises: modified processing, preparing the solution, coating film and orientating, and stabilizing to obtain the target. This invention has polarization efficiency more than 95% with thickness only in 0.5-1,2 mum.

The invention discloses a dual-output magnetic disk structure of a permanent-magnet torque converter. According to the dual-output magnetic disk structure, an input shaft penetrates through a magnetic disk frame first disk, the magnetic disk frame first disk is arranged on one side of a magnetic disk frame outer barrel, a magnetic disk frame second disk is arranged on the other side of the magnetic disk frame outer barrel, the magnetic disk frame first disk is connected with a first movable magnetic disk, a first output magnetic disk is connected with a first output magnetic disk output shaft, the outer side of the front end of the first output magnetic disk output shaft is sleeved by a second movable magnetic disk, the second movable magnetic disk is connected with an inner wall of the magnetic disk frame outer barrel, the outer side of the rear end of the first output magnetic disk output shaft is sleeved by a second output magnetic disk output hollow shaft, the outer side of the front end of the second output magnetic disk output hollow shaft is sleeved by a second output magnetic disk, a third movable magnetic disk is arranged on the front side of the second output magnetic disk, a fourth movable magnetic disk is arranged on the rear side of the second output magnetic disk, the third movable magnetic disk is connected with the inner wall of the magnetic disk frame outer barrel, and the fourth movable magnetic disk is connected with the magnetic disk frame second disk. The dual-output magnetic disk structure disclosed by the invention enables gear shifting action to be easy to achieve, improves work efficiency of a gear shifting transition work condition of the permanent-magnet torque converter and prolongs equipment service life.

The invention relates to a bucket elevator for concrete mixing, and belongs to the technical field of bucket elevators. The bucket elevator for concrete mixing comprises a shell body, wherein two empty cavities are formed in the shell body; a drive belt and an auxiliary belt cyclically rotate in the two empty cavities through a first drive wheel, a first driven wheel, a second drive wheel and a second driven wheel separately; hoppers are uniformly fixed to the drive belt and the auxiliary belt in the circumferential direction; a drive assembly is arranged on the shell body; the drive assemblyis used for driving the rotation of the first drive wheel and the second drive wheel; a charge port and a discharge port are formed in the upper end and the lower end of the shell body separately; a charge pipe slides at the charge port; and the charge pipe communicates with the outlet of a belt conveyer. When the drive belt is damaged and transport cannot be carried out, the charge pipe slides tobe arranged at the auxiliary belt, so that after stones fall into the bottoms of the empty cavities, the hoppers on the auxiliary belt convey the stones; and therefore, bucket elevator for concrete mixing has the effect of maintaining the invariable efficiency of conveying the stones into a mixing station.

The invention discloses a photocuring filter element, which comprises an adsorption material, a coating material, a photocuring adhesive and an auxiliary agent, the adsorption material is placed in the inner side of the coating material, and the photocuring adhesive is placed in the outer side or the inner side of the coating material at a set interval; and the auxiliary agent is added into the adsorption material or is coated outside the photo-curing adhesive. The invention also discloses a preparation method of the photocuring filter element. The preparation method comprises the following steps: putting the photocuring adhesive into the adsorption material, the coating material and the auxiliary agent; performing soft forming; fixing by using a tool and carrying out photocuring hard forming at the same time; and demolding to obtain the required photocuring filter element. On the basis of adopting a fine filter material, a photocuring material is introduced and arranged in the basic filter material in sequence, and through two steps of soft forming and hard forming, preparation of the filter unit which is high in precision, high in strength, easy to form, low in pressure loss, low in rejection rate, high in universality and capable of reducing labor time and solid waste can be achieved.

The invention relates to a system for increasing the smoke temperature at a denitration inlet under the low load. The system comprises an economizer in a flue, an air preheater and a selective catalytic reduction (SCR) denitration device. According to the system, the flue before an inlet of the SCR denitration device is separated into an SCR inlet main flue and an SCR inlet bypass flue, motor-driven flue baffles are arranged at the front part of the SCR inlet main flue and the front part of the SCR inlet bypass flue, driving motors are connected with a control host, temperature transmitters connected with the control host are arranged before and behind the flue baffles, a heat storage device is arranged in the bypass flue, electric valves are mounted on a water inlet pipe and a water outlet pipe of the heat storage device, and the control host controls the working states of the flue baffles and the electric valves according to the temperature values collected by the temperature transmitters. With the system, the SCR inlet smoke temperature is kept in a catalyst adaptation temperature range while the overall efficiency of a boiler is unchanged, so that the denitration device can better adapt to the change of the load of the boiler.

The invention discloses a method for treating the surface of a copper-zinc-tin-sulfur-selenium (Cu2ZnSn (S, Se) 4) film through plasma cleaning. The method for treating the surface of the copper-zinc-tin-sulfur-selenium (Cu2ZnSn (S, Se) 4) film through plasma cleaning comprises the following steps that (1), no-load cleaning is carried out on a plasma cleaning chamber before surface treatment; (2), a copper-zinc-tin-sulfur-selenium film sample is put, vacuumizing is carried out until a cavity reaches a specified air pressure, and keeping for a certain time is carried out; (3), Ar or a mixed gas of Ar and O2 are pre-introduced, keeping for a certain time is carried out, and surface cleaning is started at specified power; and (4), after the surface is cleaned for a specified time, a gas path is closed, and vacuumizing is carried out for a period of time to obtain a sample subjected to surface treatment. According to the method for treating the surface of the copper-zinc-tin-sulfur-selenium (Cu2ZnSn (S, Se) 4) film through plasma cleaning, a high-conductivity phase on the surface of the copper-zinc-tin-sulfur-selenium film is removed in a plasma cleaning mode, the surface roughness of the sample is reduced, a new phase is not formed, the influence and residue of a solution on the sample are avoided, and a contrast test can be easily carried out under the same condition in a shielding mode and the like.