Product
Patsnap Eureka
For R&D, Patsnap Eureka makes reading and utilizing patents & technical documents easy.
Patsnap Eureka AIR
Designed for self-driven R&D workflows. Generate viable solutions, solve complex R&D challenges, empower your innovation with AI.
Patsnap Eureka Materials
Designed for material experts only. Revolutionize your material R&D, from search, analyze, to developing new materials.
Feature
TechResearch
Generate reliable direction feasibility study reports for your R&D in just a few steps.
TechSeek
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
TechMind
As an expert in R&D Theories, TechMind can generates customized viable solutions instantly.
TechRisk
Analyze your overall solution with one click, know your potential R&D risks in advance.
TechMonitor
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
58 results about "Slip factor" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
In turbomachinery, the slip factor is a measure of the fluid slip in the impeller of a compressor or a turbine, mostly a centrifugal machine. Fluid slip is the deviation in the angle at which the fluid leaves the impeller from the impeller's blade/vane angle. Being quite small in axial impellers(inlet and outlet flow in same direction), slip is a very important phenomenon in radial impellers and is useful in determining the accurate estimation of work input or the energy transfer between the impeller and the fluid, rise in pressure and the velocity triangles at the impeller exit.
Well test analysis control method for low permeability gas reservoir and method thereof
InactiveCN101560879AOvercome the shortcoming of small test rangeHigh precisionBorehole/well accessoriesSkin factorBottom hole pressure
The invention provides a well test analysis control system for a low permeability gas reservoir and a method thereof. The method comprises the following steps: measuring bottom hole pressure value of a gas well in a period after well startup to obtain a relation value between pressure difference and time; judging whether the relation value equals a preset relation value, if yes, performing the next step, or correcting well test interpretation parameters corresponding to the preset relation value; taking the well test interpretation parameters corresponding to the preset relation value as the well test interpretation parameters of the gas well; analyzing gas permeation situation of the gas well according to the well test interpretation parameters so as to control exploitation of the well gas; wherein, the well test interpretation parameters comprise gas slip factor, low level permeability, skin factor, well bore storage coefficient, flow coefficient and formation pressure. The well testinterpretation according to the method perfectly accords with actual condition of the gas reservoirs, accurately describe the gas reservoirs, and provide a reference for determining production system.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
Control method of tandem cold rolling mill emulsion section cooling
The invention discloses a control method of tandem cold rolling mill emulsion section cooling, comprising the following steps: a. collecting the device parameter of a rolling mill and the key parameter of band steel to be rolled; b. collecting a technological lubrication institution parameter; c. giving emulsion section cooling flow distribution initial value and iteration precision; d. calculating corresponding work roll thermal crown; e. calculating the lateral distribution value of a slipping factor; f. comparing the slipping factor maximum value with a critical value; g. calculating the lateral distribution value of a slip injury index; h. comparing the maximum value of the slip injury index with the critical value; i. calculating the corresponding strip shape distribution value; j. calculating the function value of a strip shape objective function; and k. judging whether Powell condition is available, and obtaining the control curve of the optimal section cooling flow. The controlmethod of the invention combines device section condition with practical flow control precision to set the emulsion flow in sections, reduces problems of slipping, hot slip injury and the like causedby lubrication and ensures the strip shape and the surface quality index of chassis outlet strip steel rolled stock.
Owner:BAOSHAN IRON & STEEL CO LTD
Optimization method of technological lubrication system taking galling prevention as objective for tandem cold mill
ActiveCN103611732AReduce picking defectsImprove surface qualityWork treatment devicesProfile control deviceDefined ProcedureEmulsion
Disclosed is an optimization method of a technological lubrication system taking galling prevention as an objective for a tandem cold mill. The method mainly comprises the following computer-executed steps: 1, collecting main equipment and technological parameters of a five-stand tandem cold mill; 2, defining procedure parameters related in the technological lubrication system optimization procedure; 3, giving initial values of emulsion flow, emulsion concentration and emulsion temperature of a first stand, a second stand, a third stand, a fourth stand and a fifth stand; 4, computing a friction coefficient mui of each stand in a current technological lubrication system and rolling schedule; 5, computing rolling pressure, rolling power and slip factors of each stand; 6, computing thermal crown distribution of a working roll of each stand; 7, computing an outlet flatness value of the tail stand; 8, computing a value of a comprehensive galling judgment index lambdai of each stand; 9, computing an optimization objective function in the current technological lubrication system; 10, completing optimal setting of the technological lubrication system, taking the galling prevention as the objective, of the tandem cold mill. By the method, galling defection occurrence probability of each stand is lowered, and outlet surface quality of strip steel is improved.
Owner:唐山市榕泽钢材加工有限公司
Optimal setting method for relationship curve of emulsion flow and rolling speed in cold rolling process
ActiveCN106909723ASmall fluctuationQuality assuranceForecastingDesign optimisation/simulationEmulsionStrip steel
Provided is an optimal setting method for the relationship curve of the emulsion flow and the rolling speed in the cold rolling process. The method mainly comprises the following steps: 1, collecting main equipment and process parameters of a cold rolling unit; 2, defining the process parameters involved in the optimization process of the emulsion flow; 3, calculating the roll bending force of a rack working roll; 4, initializing the emulsion flow coefficient; 5, calculating the set value of the emulsion flow corresponding to Vi; 6, calculating the friction coefficient mui corresponding to Vi; 7, calculating the rolling pressure, slipping factor and thermal slipping injury index corresponding to Vi; 8, solving the objective function; 9, outputting the best emulsion flow coefficient, and determining the relationship curve of the best emulsion flow and speed. The method has the advantages that the overall fluctuation rate and the maximum fluctuation rate of the rolling pressure can be kept smaller during the speed-up and speed-down process, and it is ensured that the slipping and thermal slipping defects are prevented from occurring in the rolling process, thus the surface quality and the strip shape control precision of strip steels are improved.
Owner:YANSHAN UNIV
Method for setting concentration of emulsion in rolling of five-rack cold continuous rolling unit extremely thin band
InactiveCN103544340AIncrease rolling speedGuaranteed rolling efficiencyVibration control deviceSpecial data processing applicationsEmulsionBending force
The invention discloses a method for setting concentration of emulsion in rolling of a five-rack cold continuous rolling unit extremely thin band. The method includes the following steps: (1) collecting characteristic parameters of main devices of a unit and to-be-rolled bands, main rolling process parameters and process lubricating system parameters, (2) defining related process parameters, (3) computing roll bending force and the roll channeling amount, (4) assigning related search process parameters, (6) computing concentration process parameters, (6) computing the search process speed of the highest rolling speed, (7) computing friction coefficients of various racks under the current condition, (8) computing rolling force, rolling power, slip factors, heat slip damage indexes and vibration coefficients of the various racks under the current condition, (9) computing heat convexity degrees of working rollers of the various racks, (10) computing an exit plate shape and the pressing width, and (11) obtaining and outputting the optimum proportion concentration. The steps are executed by a computer. According to the method, the rolling speed can be quickened, the rolling efficiency can be guaranteed, slip, heat slip damage and vibration are avoided, and it is guaranteed that the exit plate shape of the final rack and the pressing width of the roller ends of the working rollers are the smallest.
Owner:唐山扬邦钢铁技术研究院有限公司
Reduction schedule optimization method for rolling ultrathin strip steel by cold continuous rolling set
ActiveCN104785538AClosure rate downRolling load balanceRoll force/gap control deviceTension/compression control deviceControl systemStrip steel
The invention discloses a reduction schedule optimization method for rolling ultrathin strip steel by a cold continuous rolling set, and relates to special control equipment or a method for a metal rolling machine or other processed products, in particular to a reduction schedule optimization method for rolling ultrathin strip steel by a cold continuous rolling set; traditional equipment parameters and process parameter data of a cold continuous rolling set control system are used for defining process parameters giving consideration to the plate shape, the plate convexity and the reduction control and related to the reduction schedule optimization to calculate optimized target functions under present reduction schedule; the reduction schedule optimization is realized through the computer program control; and under the precondition of considering the safety coefficient, the reduction schedule comprehensive optimization setting of the ultrathin strip steel rolling is realized through judging if the rolling pressure, the rolling power, the slip factor, the slip index, the plate shape, the plate convexity and the reduction are excessive. After the method is adopted, the plate shape in an outlet of a tail frame representing the strip quality is obviously reduced, the plate convexity pass percent is prominently improved, and the strip quality is obviously improved compared with a traditional method.
Owner:BAOSHAN IRON & STEEL CO LTD
Rolling schedule comprehensive optimization method for cold continuous rolling unit taking scratch prevention as objective
InactiveCN103586286AEvenly distributed relative power headroomEvenly distributedRolling equipment maintainenceMeasuring devicesReduction rateStrip steel
A rolling schedule comprehensive optimization method for a cold continuous rolling unit taking scratch prevention as an objective mainly comprises the following steps that 1, main equipment and technological parameters of the cold continuous rolling unit with five machine frames are collected; 2 procedure parameters involved in a rolling schedule optimization procedure are defined; 3, the ability of the unit to regulate the outlet plate shapes is improved; 4, initial values of reduction rates epsilon<i0> of the first machine frame, the second machine frame, the third machine frame and the fourth machine frame and initial values of outlet tension force T<i0> of the first machine frame, the second machine frame, the third machine frame and the fourth machine frame are given; 5, an initial value of the reduction rate of the fifth machine frame is calculated; 6, rolling pressure, rolling power, slipping factors, and the outlet plate shape value of each machine frame are calculated; 7, the value of a scratch comprehensive judgment index lambada of each machine frame is calculated; 8, an optimized objective function is calculated; 9 the optimal rolling schedule is output; the steps are executed through a computer. By means of the rolling schedule comprehensive optimization method, the scratch comprehensive judgment index of each machine frame can be predicted accurately, the occurrence possibility of scratch defects is reduced to the greatest extent, production efficiency is increased, and outlet surface quality of strip steel is improved.
Owner:山东冠洲股份有限公司
Optimal setting method for roll force of six-roller temper mill unit
ActiveCN103302108AImprove control stabilityHigh yieldRoll force/gap control deviceStrip steelEngineering
The invention relates to an optimal setting method for roll force of a six-roller temper mill unit, and belongs to a strip steel temper rolling production process and a control technology. After a lot of production tests and theory researches, the equipment and process characteristics of the temper rolling process of a six-roller temper mill are fully considered. According to the method, a set of optimal roll force setting values of the temper mill is determined for each type of steel and each specification. When a new specification of product is produced at the first time, a system can give the reasonable roll force setting values. Under the conditions of ensuring that slip factors are in a critical point, calculating the impact response amplitude of the roll force of the temper mill not to be beyond load, and finally being combined with the actual production, the roll force setting values of the temper mill are determined. The bad phenomena of unstable production, break by rolling and the like due to inaccurate setting are reduced. The strip shape controlling stability of the temper mill can be improved, and the yield is increased.
Owner:SHOUGANG CORPORATION
Method for optimizing tension system for rolling of ultra thin steel strip of cold continuous rolling mill
ActiveCN104785537AStrip quality improvementImprove material qualityTension/compression control deviceStress distributionControl system
The invention discloses a method for optimizing a tension system for rolling of an ultra thin steel strip of a cold continuous rolling mill, and relates to control equipment or method special for metal rolling mills or machining products of the metal rolling mills, in particular to optimization of a comprehensively-controlled tension system in the rolling process of ultra thin materials of the cold continuous rolling mill. The cold continuous rolling mill is used for controlling existing equipment parameter and technological parameter data of equipment; according to inlet tensile stress, outlet tensile stress, deformation resistance, the rolling speed, the width of a strip material, the inlet thickness, the output thickness and the working roller diameter of all racks, slipping factors, hot slip indexes, vibration coefficients, rolling force and rolling power of all the racks under the current working condition are calculated; through program control of a computer, optimization control over the tension system is achieved; the depressing capacity, the rolling efficiency and outlet strip shapes and tensile stress distribution of all the racks are considered while the rolling stability, slippage, heat slippage and vibration are considered; and the tail rack output strip shape which represents the strip quality is obviously reduced, and the strip quality is obviously improved than that of a traditional method.
Owner:BAOSHAN IRON & STEEL CO LTD
Method for controlling a pedal-driven vehicle and control device
ActiveCN103373433AAvoid frictional contactLoss of frictional contactRider propulsionDrive wheelControl theory
The invention provides a pedal-driven vehicle (1) with a drive unit (12). The vehicle includes a pedal-driven apparatus (25) and a motor (10) as an auxillary device. The method involves detecting a slip factor (n, nmot), where the slip factor is detected as an alteration of pedal rotation speed over a turning rate sensor at the driven wheel. A pedal rotational torque is detected (130), and a drive unit is controlled based on the detected slip factor. A sum of the motor torque and the pedal rotational torque is controlled based on the detected slip factor.
Owner:ROBERT BOSCH GMBH
Rolling tension control method of double-rack four-roller mill
InactiveCN104289528AGuarantee the shape qualityPrevent slippingTension/compression control deviceMetal rolling arrangementsLoop optimizationLubrication
The invention discloses a rolling tension control method of a double-rack four-roller mill. The rolling tension control method includes the steps of collecting parameters, wherein the parameters collected in the parameter collecting step include the parameters of the equipment, the parameters of to-be-rolled strips, the rolling technology parameters and the technological lubrication parameters; conducting initialization, wherein control variables are initialized; conducting loop optimization, wherein the tension is adjusted in the loop optimization step according to slipping factors, vibration factors, rolling pressures and rolling powers of a first rack and a second rack, whether quit conditions are met or not is judged, the current tension serves as the optimal tension if the quit conditions are met, and the loop optimization is continuously carried out on the tension if the quit conditions are not met. According to the rolling tension control method, the tension in the cold rolling process is optimized, and therefore the production efficiency is improved to the maximum degree on the premise that the sheet shape quality of a high-stage automobile sheet is guaranteed and defects such as slippage and vibration are avoided.
Owner:上海宝钢钢材贸易有限公司
Aircraft anti-skid brake control method based on brake moment feedback
ActiveCN105752325AImprove anti-skid braking efficiencyPrevent slippingBrake regulatorsBraking systemsAircraft landingSlip factor
The invention relates to an aircraft anti-skid brake control method based on brake moment feedback. The aircraft anti-skid brake control method comprises steps as follows: brake moment and revolving speed of aircraft wheels are detected; an actual slip factor is determined on the basis of the brake moment and the revolving speed; the actual slip factor and a slip factor threshold value are compared; if the actual slip factor is equal to the slip factor threshold value, the slip factor threshold value is updated; the brake moment is reduced so as to enable the actual slip factor to be smaller than the updated slip factor threshold value. According to the scheme, skid of the aircraft wheels can be avoided, and the anti-skid brake efficiency of an aircraft under the condition of complicated runway surfaces is improved.
Owner:BEIHANG UNIV
Tension comprehensive optimization setting method of six-roll skin pass mill
InactiveCN102284509AEasy to shapeQuality improvementTension/compression control deviceProfile control deviceStrip steelEngineering
The invention discloses a method for comprehensively optimizing tension setting of a six-roll skin pass unit, which belongs to the technical field of skin pass production. Fully considering the equipment and process characteristics of the six-high skin pass mill during the wet skin pass rolling process, according to this method, the set value of the tension of the six-roll pass pass unit is determined, and a set of optimal tension set values of the pass pass machine is determined. Within the critical point, under the premise that the vibration judgment conditions are satisfied and the rolling pressure is not out of tolerance, the distribution of front tension, rolling pressure, and roll pressure is the most uniform in the transverse direction, and finally realize the improvement under the premise of ensuring that the skin pass unit does not slip and vibrate. The shape and surface quality of the finished strip can be improved to reduce the occurrence probability of color difference defects on the strip surface.
Owner:SHOUGANG CORPORATION
Method of determining pump flow in rotary positive displacement pumps
InactiveUS20140135999A1Less slipRestore flow accuracyFlow control using electric meansFluid pressure measurementFrequency changerEngineering
Techniques are provided for tuning a rotary positive displacement pump. The techniques include apparatus featuring a signal processor configured to the present invention may take the form of apparatus comprising a signal processor that may be configured to receive signaling containing information about actual pump performance data related to the operation of a rotary positive displacement pump; and determine corrected published pump performance data to operate the rotary positive displacement pump by compensating published pump performance data based at least partly on the actual pump performance data. The corrected published pump performance data may include a corrected published rated power, flow and slip factor, and the actual pump performance data contains information about actual power, specific gravity and viscosity related to the operation of the rotary positive displacement pump and received from a pump controller or controlling device, including a variable frequency drive.
Owner:ITT MFG ENTERPRISES LLC
Initial correction factor determining device and device utilizing the same for vehicle
InactiveUS6061642ANot easy to slipAccurate calculationAnalogue computers for trafficSpeed/acceleration/shock instrument detailsEngineeringAtmospheric pressure
PCT No. PCT / JP97 / 00791 Sec. 371 Date Nov. 13, 1997 Sec. 102(e) Date Nov. 13, 1997 PCT Filed Mar. 13, 1997 PCT Pub. No. WO97 / 34152 PCT Pub. Date Sep. 18, 1997A device for determining a correction factor for correcting an output of a rotational velocity mechanism for detecting the rotational velocity of a tire mounted on a vehicle, and a slip factor calculating device and a tire pressure drop detecting device utilizing the determining device. The rotational velocity of the tire is detected in response to the fact that an initializing switch is operated at the time of trial linear coasting. An initial correction factor is found on the basis of the rotational velocity. The initial correction factor is stored in an E2PROM. At a time of normal traveling, the rotational velocity is initially corrected on the basis of the initial correction factor (S2). Further, the slip factor is calculated on the basis of the rotational velocity after the initial correction (S3). A judged value required to detect the drop in air pressure in the tire is corrected on the basis of the slip factor or the like (S9). The initial correction factor representing only a relative difference in effective rolling radius between tires can be acquired, so that an initial difference can be eliminated from the rotational velocity with high precision.
Owner:SUMITOMO ELECTRIC IND LTD +1
Tension optimizing and compensating method for adjusting rolling force
ActiveCN104785539ALow costReduce the incidence of defects such as plate shapeRoll force/gap control deviceTension/compression control deviceGeneration rateFrictional coefficient
The invention discloses a tension optimizing and compensating method for adjusting rolling force, and relates to control equipment or a method specially suitable for a metal rolling mill or other processed products, in particular to a tension optimizing and compensating method for adjusting rolling force according to an iron powder concentration of rolling lubrication emulsion. The method comprises the following steps: (A) a today emulsion iron powder monitoring concentration is obtained from a cold continuous rolling set control system; and frictional coefficients corresponding to all frames are calculated according to the today emulsion iron powder monitoring concentration; and (B) the obtained frictional coefficients are calculated according to an actual tension sum of all sections of strip steel to adjust the set tension of each section of the strip steel; slip factors of all the frames are calculated according to the set tensions and the rolling force of all the frames; and the set tensions are optimized and compensated with the smallest slip generation rate as target function. The method realizes the reduction of the generation rate of the increment of production cost and the plate shape defect caused by abnormal rise of the iron powder concentration to the greatest extent through optimizing the set tensions so as to guarantee the stability of rolling process.
Owner:BAOSHAN IRON & STEEL CO LTD +1
Well test analysis control method for low permeability gas reservoir and method thereof
InactiveCN101560879BOvercome the shortcoming of small test rangeHigh precisionBorehole/well accessoriesSkin factorBottom hole pressure
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
Method of identifying slip factors causing slope instability by utilizing displacement monitoring
InactiveCN103134433ASolve the problem of mutual transformation of multiple correlationsAchieve conversionUsing optical meansInstabilityEngineering
The invention discloses a method of identifying slip factors causing slope instability by utilizing displacement monitoring. The method of identifying the slip factors causing the slope instability by utilizing the displacement monitoring includes the following steps: step one, the number of to-be-tested slopes, the number of samples of the slopes, and slope elements in a to-be-test area are determined; step two, slope displacement monitoring foundation pile points are arranged, displacement monitoring datum points are selected to form a slope displacement monitoring control net; step three, optical fiber monitoring displacement number equipment and equipment monitoring of the displacement monitoring datum points are arranged; step four, quantified slip factors and qualitative slip factors causing the slope instability are determined; step five, reference variable, namely slop displacement statistical magnitude is determined; step six, a prediction equation of relevancy of the slip factors causing the slope instability is set up; step seven, the prediction accuracy of the prediction equation of relevancy of the slip factors causing the slope instability is calculated; and step eight, the contribution and influence degrees of each slip factor to the slope instability are analyzed. The method of identifying the slip factors causing the slope instability by utilizing the displacement monitoring achieves the conversion from qualitative variable to quantitative variable, and resolves the problem of mutual conversion of multiple correlations among the factors.
Owner:QINGDAO TECHNOLOGICAL UNIVERSITY
Method of determining pump flow in rotary positive displacement pumps
Owner:ITT MFG ENTERPRISES LLC
Rolling speed optimization method with benefit control as target in cold continuous rolling process
ActiveCN105234188AReasonable control of rolling speedImprove production efficiencyRolling mill drivesMetal rolling arrangementsReduction rateElectricity
A rolling speed optimization method with benefit control as a target in the cold continuous rolling process mainly comprises the following steps that 1, field parameters are collected; 2, unit friction characteristic parameters are collected; 3, unit benefit parameters are collected; 4, relevant parameters are defined; 5, the outlet speed, the reduction rate, the gate absolute draught and the equivalent tension influence coefficient of an ith rack are calculated; 6, the friction coefficient of the ith rack is calculated; 7, the rolling force of the ith rack is calculated; 8, the working roll elastic flattening radius, the outer friction force influence coefficient, the forward slip valve and the rolling torque of the ith rack are calculated; 9, the slip factor of the ith rack is calculated; 10, the slip index of the ith rack is calculated; 11, the rolling power of the ith rack is calculated; 12, the total electricity consumption of all racks of a unit is calculated; 13, a unit time benefit control target function expression is constructed; and 14, the optimal rolling speed is output. The reasonable target value for rolling speed control is set, enterprise cost is effectively reduced, and production efficiency is improved.
Owner:唐山市榕泽钢材加工有限公司
Diagonal flow pump impeller hydraulic design method
The invention relates to a diagonal flow pump impeller hydraulic design method. A design formula about main geometric parameters of the impeller is given, and includes an included angle Alpha between the outlet of the diagonal flow pump impeller and the horizontal line, the actual thickness Delta of each point of each vane, vane wrap angle Phi, the inlet fillet radius RTS of the rear cover plate of the impeller, the number z of impeller vanes, the diameter D2 of the impeller outlet, the width b2 of the vane outlet, the equivalent diameter D0 of the impeller inlet, a distance ZE between the vane inlet of the front cover plate and the outlet of the front cover plate of the impeller, a distance g1 from the inlet edge to the initial end of the curve of the front cover plate, the inlet fillet radius RDB of the front cover plate of the impeller, round nut radius Ra of the impeller, round nut height Rb of the impeller, the placing angle of the vane Beta, the placing angles Beta1 of inlet of the vane, the placing angles Beta2 of inlet of the vane, the slipping coefficient Rho and the hydraulic efficiency Etah. According to the impeller of the diagonal flow pump designed by the invention, the hydraulic efficiency of the impeller and the stability performance of the diagonal flow pump are improved, and computer programming is facilitated, and thereby the original similar design method and the velocity coefficient method of the diagonal flow pump can be replaced to a great extent.
Owner:JIANGSU UNIV
Gas permeability determination method of nano-pore-containing reservoir
The invention relates to a gas permeability determination method of a nano-pore-containing reservoir. The method includes the steps: simulating and calculating gas flow in a digital model matrix of arock by a lattice Boltzmann method (LBM), and counting average fluid velocity under different inlet pressure conditions mu (m / s); performing least square fitting on average fluid velocities corresponding to different inlet-outlet pressure differences by the aid of fitting target functions to obtain unknown intrinsic permeability Ko (m<2>) and a diffusion coefficient Dk (m<2> / s) of the rock; calculating a slip factor bk (Pa), and calculating gas permeability of the rock, namely, apparent permeability Ka (m<2>). The method solves the problem that the permeability of an excessively compact reservoir cannot be measured.
Owner:PETROCHINA CO LTD +1
Slip factor learning method of dual clutch transmission
A slip factor learning method of a dual clutch transmission (DCT) may include: determining, by a control unit, whether the DCT is up-shifted or down-shifted; comparing an engine speed to a shift start reference speed, and determining whether the engine speed enters an actual gear shifting period or actual gear shifting is completed, in response to the determined type of the gear shifting; comparing a magnitude of an engine torque to a magnitude of a clutch torque at a point of time that the engine speed enters the actual gear shifting period or the actual gear shifting is completed; and learning a slip factor at the point of time that the engine speed enters the actual gear shifting period or the actual gear shifting is completed, based on the magnitude comparison result between the engine torque and the clutch torque.
Owner:HYUNDAI KEFICO CORP
Closed impeller and gas compressor
The invention discloses a closed impeller. The closed impeller comprises a rear cover, blades, a sleeve body and a front cover, the front cover covers the blades, the front cover is in a circular truncated cone ring shape, an air inlet surface is a curved surface in smooth transition along the ridge outline of the blades, grooves matched with the ends of the blades are formed in a back air surface, and the ends, corresponding to the grooves, of the blades are embedded into the grooves to be connected in a close fit manner. A flow channel is formed among the blades, the rear cover and the frontcover; and the tail part of the front cover and the rear cover are separated into spaced air outlets by the blades, and air flows out of the air outlets from the front parts of the blades through theflow channel. The invention further discloses a gas compressor comprising the closed impeller structure. The closed impeller is provided with the front cover, so that gas leakage is little, frictionloss is small, flowing resistance is small, and efficiency is high in the working process. The front cover is made of carbon fiber composite materials, and the impeller is light in overall weight andhigh in strength. The splitter blades are arranged, so that blockage of inlet airflow can be reduced, the slip coefficient of an outlet of the impeller can be increased, the impeller efficiency is improved, and the overall efficiency of the gas compressor can be improved.
Owner:刘慕华
Control method of tandem cold rolling mill emulsion section cooling
ActiveCN101683660BQuality assuranceThe principle of the control method is clearProfile control deviceWork rollEmulsion
The invention discloses a control method of tandem cold rolling mill emulsion section cooling, comprising the following steps: a. collecting the device parameter of a rolling mill and the key parameter of band steel to be rolled; b. collecting a technological lubrication institution parameter; c. giving emulsion section cooling flow distribution initial value and iteration precision; d. calculating corresponding work roll thermal crown; e. calculating the lateral distribution value of a slipping factor; f. comparing the slipping factor maximum value with a critical value; g. calculating the lateral distribution value of a slip injury index; h. comparing the maximum value of the slip injury index with the critical value; i. calculating the corresponding strip shape distribution value; j. calculating the function value of a strip shape objective function; and k. judging whether Powell condition is available, and obtaining the control curve of the optimal section cooling flow. The control method of the invention combines device section condition with practical flow control precision to set the emulsion flow in sections, reduces problems of slipping, hot slip injury and the like caused by lubrication and ensures the strip shape and the surface quality index of chassis outlet strip steel rolled stock.
Owner:BAOSHAN IRON & STEEL CO LTD
Setting method of emulsion concentration in ultra-thin strip rolling of five-stand cold tandem mill
InactiveCN103544340BIncrease rolling speedGuaranteed rolling efficiencyVibration control deviceSpecial data processing applicationsEmulsionEngineering
A method for setting the concentration of the emulsion in the ultra-thin strip rolling of a five-stand cold tandem rolling unit, comprising the following steps executed by a computer: 1. Collecting the main equipment of the unit, the characteristics of the strip to be rolled, the main rolling process and Process lubrication system parameters; 2. Define relevant process parameters; 3. Calculate roll bending force and roll shifting amount; 4. Assign values to relevant search process parameters; 5. Calculate concentration process parameters; 6. Calculate search process speed of maximum rolling speed; 7. Calculate the friction coefficient of each stand under the current conditions; 8. Calculate the rolling force, rolling power, slip factor, thermal slip index and vibration coefficient of each stand under the current conditions; 9. Calculate the working roll of each stand Thermal convexity; 10. Calculate the outlet plate shape and pressing width; 11. Obtain and output the optimal ratio concentration. The invention can increase the rolling speed, ensure the rolling efficiency, avoid slipping, thermal slipping and vibration, and ensure the minimum shape of the end stand exit and the pressing width of the work roll end.
Owner:唐山扬邦钢铁技术研究院有限公司
Method and apparatus for controlling dual clutch transmission
InactiveUS20160167665A1Quickly performing gear shift without obstructionGearing controlControl theorySlip factor
The present invention relates to a method and apparatus for controlling a dual clutch transmission. The method includes receiving a gear shift start command; coupling a target gear to a second input shaft according to the gear shift start command; and releasing a first clutch torque applied to a first clutch associated with a first input shaft and increasing a second clutch torque applied to a second clutch associated with the second input shaft up to an engines torque, wherein the second clutch torque is determined by applying a target slip factor to a predetermined control position of the second clutch. According to the present invention, when a dual clutch transmission performs gear shift to a target gear, gear shift may m be quickly performed without obstruction by applying an optimum torque for controlling the clutch.
Owner:HYUNDAI AUTRON
Method and regulating device for regulating a pedal-driven vehicle
ActiveCN103373433BImprove skiddingAvoid frictional contactRider propulsionDrive wheelDriver/operator
Owner:ROBERT BOSCH GMBH
Centrifugal long shaft pump with different lifts and assembly process
InactiveCN105952654AReduce the required powerLow costPump componentsEngine controlDrive shaftCoupling
The invention discloses a centrifugal long shaft pump with different lifts and an assembly process. The centrifugal long shaft pump with the different lifts comprises a long shaft pump body. The long shaft pump body comprises a motor, a water lifting pipe and impellers. Each impeller comprises a first blade, a second blade and a third blade, wherein the slipping coefficient of the first blade is greater than that of the second blade and that of the third blade. The assembly process comprises the following steps that (1) transmission shafts are connected through couplings; (2) the motor is fixed to a pump seat, and the transmission shafts are connected with a spindle of the motor; (3) the impellers are connected to an impeller shaft, and a pump case is connected to the water lifting pipe; (4) a horn mouth is connected to the bottom of the pump case; and (5) the assembled long shaft pump is buried underground. The design of the unequal lifts is adopted for the impellers of the long shaft pump, blades with different streamlines are obtained, and accordingly the shaft power is increased as much as possible while the power and cost of the matching motor are not increased.
Owner:SANMEN VOCATIONAL SECONDARY SPECIALIZED SCHOOL
Method for determining slip factors of centrifugal pump on basis of internal flow measurement under all conditions
ActiveCN102865233BCalculations applyPump controlNon-positive displacement fluid enginesEngineeringLinear regression
Owner:JIANGSU UNIV
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com