Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

163 results about "Specified load" patented technology

In civil engineering, specified loads are the best estimate of the actual loads a structure is expected to carry. These loads come in many different forms, such as people, equipment, vehicles, wind, rain, snow, earthquakes, the building materials themselves, etc. Specified Loads also known as Characteristic loads in many cases.

System for dispatching and controlling of generation in large-scale electric power systems

A system for dispatching and controlling generation in an electric power system consisting of a plurality of power units comprises a computer with dispatching optimization module connected by communications means to the power units. According to the invention, in the electric power system consisting of a plurality of subsystems each comprising a plurality of power plants provided with power units, said computer is a higher-layer computer and the specified load dispatching optimization module is designed to determine parameters for an optimal interchange of power and energy between subsystems. The inventive controlling system further comprises a plurality of computers according to a number of subsystems, said computers being lower-layer computers each comprising a specified subsystem dispatching optimization module designed to determine parameters for an optimal allocation of generation between power plants within a subsystem, and a unit for computation of functional characteristics for each subsystem, wherein each lower-layer computer is connected by lower-layer communications means to respective power plants of respective subsystems. The inventive controlling system also comprises higher-layer communications means, wherein the lower-layer computers are connected to a higher-layer computer via the higher-layer communications means.
Owner:SUKHANOV OLEG ALEXEEVICH +2

Roller fatigue test apparatus

A machine suitable for evaluating finished cylindrical manufactured part that accurately simulates the performance of the intended use of the part in a cam-roller contact geometry using an actual manufactured part as the test specimen is provided. The machine is capable of evaluating the effects on the can finish and profile of the manufactured part. Three idler rollers ground to simulate the axial cam geometry are compressed into the outer diameter of the bearing as it rotates, duplicating the rolling action of a cam lobe. Because the cylindrical manufactured part to be tested is loaded evenly between the three idles, the test part experiences three stress cycles per revolution, accelerating the generation of fatigue spalling damage on the outside diameter. Load and speed are regulated using a closed loop control. Ease of replacing the part to be tested and servicing the idler rollers is an advantageous feature of the machine. A calibration fixture is provided for verifying that the machine is applying the specified load evenly on all three sides of the cylindrical manufactured part that is under test. Alternately the machine can be configured so as to enable the testing of three manufactured test specimens simultaneously. With the addition of a torque transducer, the torque generated between a journal bearing roller and shaft may be measured and monitored.
Owner:GENTEK TECH MARKETING

Thermoelectric cooperative control method for sofc system based on fractional order sliding mode variable structure

The present invention provides a thermoelectric cooperative control method for the SOFC system based on fractional order sliding mode variable structure, comprising the following steps: S1, collecting parameters of system states and output under combinations of different input parameters of the SOFC system, acquiring an influence function of steady-state power, temperature, efficiency response characteristics and bypass valve opening BP within a full load interval on efficiency optimization, as well as an efficiency optimization function within a specified load switching interval and under a time-delay condition; S2, acquiring a local optimal steady-state operation function, a global optimal function under the steady state developed and formed, and a power tracking function with different switching intervals and different time-delay conditions; S3, calculating a sliding mode interval; S4, calculating a series reaching law function according to optimization functions; S5, eliminating chattering of the series reaching law function through a fractional order optimization method, and solving the reaching law by calculation. The present method can provide precise, flexible and stable control, greatly speed up the switch process, overcome time-delay feature of the great inertia of the SOFC system, and realize fast load switching.
Owner:HUAZHONG UNIV OF SCI & TECH

Device and method for compensating or unloading prestressed load of anchor cable

A device and method for compensating or unloading the prestressed load of an anchor cable. For an anchoring project in which the length of the steel strand at the exposed section of the anchor cable meets the tension length, the device includes: a limiting plate, a small jack and a support tube. For the anchor cable For the anchoring project where the length of the steel strand at the exposed section does not meet the tension length, the anchor cable prestress load compensation or unloading device also includes an anchor cable extension device. Anchor cable prestress load compensation or unloading methods include: install anchor cable prestress load compensation or unloading device, install tension jack and tool anchor, insert tension tool anchor clip to tighten external steel strand; start tension The jack oil pump applies the load until the working anchor is pulled and the clip of the working anchor is loosened, continue to apply the load or unload to the specified load value, and then start the small jack to load and push back to the limit plate, the clip re-cables the steel strand, and then Unloading, to complete the anchor cable stress compensation or load reduction, so as to reliably ensure the load compensation or unloading effect of the anchor cable prestress.
Owner:中铁西北科学研究院有限公司深圳南方分院

Hydraulic servo buffer capable of achieving active control

The invention discloses a hydraulic servo buffer capable of achieving active control. The hydraulic servo buffer is characterized in that a low-pressure energy accumulator with a switch valve is connected with a hydraulic constant delivery pump with a motor, the hydraulic constant delivery pump is connected with an inlet of a one-way valve, an outlet of the one-way valve is connected with an oil inlet of a hydraulic servo valve with a hydraulic servo amplifier, an oil return port of the hydraulic servo valve is connected with an oil outlet of the low-pressure energy accumulator, two ports of an oil outlet of the hydraulic servo valve are connected with two oil inlets of a hydraulic lock, oil outlets of the hydraulic lock are connected with a rodless cavity and a rod cavity of a hydraulic cylinder respectively, and a pressure sensor is arranged on a pipeline which enables the hydraulic lock and the rodless cavity to be connected; and a displacement sensor is arranged on a piston rod inthe hydraulic cylinder, the outer end of the piston rod of the hydraulic cylinder is hinged to a sliding block through a spherical hinge, and the sliding block is arranged on a guide rail corresponding to the sliding block. According to the hydraulic servo buffer capable of achieving active control, the responding speed and the control precision are high, specified loads are applied to a system, and then the requirements of some high-grade, precision and advanced special occasions on load reducing are achieved.
Owner:YANSHAN UNIV

Cold roll milling technology for rotor blade and stator blade of high pressure compressor for GH150 alloy

The invention relates to a process for carrying out cold rolling on a moving blade and a stationary blade of a GH150 alloy high-pressure compressor. The process comprises a flow of a predominant process and a heat-treatment process: a semi-precision forging piece is subjected to solid solution and oil cooling; subsequently, a rabbet is machined and a root part of a blade body is milled; subsequently, the blade body is leveled and is subjected to primary cold rolling, argon charging and cold solid solution treatment in vacuum and secondary cold rolling till the blade body is rolled to have no residue; the blade body is charged with argon in a vacuum furnace and is subjected to the treatment of cold solid solution and cold sizing; and the rabbet and the gas inlet and exhaust edge of the blade body are subjected to polishing, fine machining, primary aging in the vacuum furnace, argon protection, secondary aging treatment and vibrating burnishing. The process has the advantages that engineering application research on a cold rolling technology of the blade is carried out, successfully working blades and rectifying blades with thirteen levels of the high-pressure compressor of an engine are developed; and the blade passes a cyclic vibration fatigue test under specified load and a long-term trial-run test of the engine.
Owner:SHENYANG LIMING AERO-ENGINE GROUP CORPORATION

Calculation of equivalent modulus of composite laminates and strength verification under given load

The invention relates to the field of composite material design, in particular to calculation of equivalent modulus of composite laminates and strength verification under a given load. The invention comprises an information input module, an operation module and an information output module. Material property information, laminating information and load data information are input into the information input module. Three stiffness matrices A, D, B of composite laminates are calculated according to the input data by a computing program, and the equivalent modulus and stiffness matrices of composite laminates under pure in-plane load and pure bending-torsion load are calculated according to the matrix A and matrix D. At the same time, according to the stiffness matrix and load information, theoverall strain and deflection rate of the laminate can be calculated, and the stress and strain information of each single layer can be obtained. Through adoption of three composite failure criteria,whether the laminate meets the strength requirements under the specified load can be checked. The invention greatly improves the calculation speed, and the accurate numerical solution of stress and strain can be directly and quickly obtained for the analysis of the laminated plate under the simple stress condition, and the design efficiency is improved.
Owner:WEIHAI GUANGWEI COMPOSITES

On-site current transformer comprehensive detector and testing method thereof

The invention discloses an on-site current transformer comprehensive detector and a testing method thereof. The on-site current transformer comprehensive detector comprises a transformer calibrator, a standard instrument and an artificial load box which are connected with a to-be-tested current transformer. The standard instrument is compared with the secondary side of the to-be-tested current transformer and transmits differential current signals and standard secondary signals both acquired through comparison to the transformer calibrator. The transformer calibrator performs calibration, data collection and data processing calculation on input signals of a to-be-tested device. The artificial load box is used for providing specified loads to the to-be-tested device. Errors and related parameters of the to-be-tested current transformer are actually measured under low power frequency currents, errors under rated currents are extrapolated on the basis of a low current test, and then overall transformer performance indexes including magnetic saturation margin, volt-ampere characteristics, magnetic properties and security coefficients of the to-be-tested transformer are measured. The problems of difficulty in connecting of a high-current transformer and inability of accurate verification are solved, labor intensity of workers is lowered, and working efficiency is improved.
Owner:STATE GRID CORP OF CHINA +3
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products