9results about How to "Guaranteed design accuracy" patented technology

The invention discloses a thermo-acoustic oscillation passive control axial grading combustion chamber which comprises a fuel gas distribution pipe, a head gas distribution cavity, a cooling end plate, a weak rotation micro-mixing on-duty nozzle, a direct injection micro-mixing main combustion nozzle, an axial grading nozzle, a flame tube, a flow guide bushing and an outer casing. Due to the combustion arrangement of head micro-mixing combustion and axial staged combustion, fuel gas distribution is optimized; the ignition / load-per-liter combustion stability of the combustion chamber is realized through the weak-rotation micro-mixing on-duty nozzle; the axial grading nozzle adopts a lobe structure to enhance fuel and air mixing; the cooling hole structure of the axial grading nozzle is optimized, and the effect of restraining thermo-acoustic oscillation is achieved; and the opening positions of the axial grading windward side and leeward side cooling holes are improved, so that flame lifting under the high-hydrogen-content fuel is realized. According to the axial grading combustion chamber arrangement mode, the residence time of smoke in a high-temperature area is shortened, NOx pollutant emission of the combustion chamber is reduced, and the requirement for efficient, stable and low-emission operation under the condition of high-hydrogen-content fuel is integrally met.

The utility model provides an assembled brushless rotary transformer, which overcomes the defects of higher structural complexity and higher processing and assembling difficulty of the conventional assembled brushless rotary transformer. Starting from the structure of the assembly type brushless rotary transformer, through the innovative design of the main shell, the rear cover, the screw ring and the assembly form, compared with a redundant structure of a traditional structure, the integrated structure of the main shell and the screw-free rear cover enables the overall structure of the rotary transformer to be simpler and more compact, the size is further reduced, and the structure is more compact. The overall assembly is simpler, the product integration degree is improved, the assembly difficulty and errors of products are greatly reduced, the assembly workload is reduced, the design precision is ensured, the assembly precision is improved, and therefore the product precision is improved.

The present invention discloses a multi-objective rapid iteration optimization design method for IGBT modules of wind turbines. First, based on the actual processing, manufacturing and use requirements of IGBT modules of large wind turbines, a multi-objective performance improvement optimization design model is established, and the rapid iteration of the performance response model under different design variables is realized by combining parametric modeling; then, based on the efficient proxy modeling method of self-learning adaptive sampling strategy, the performance response of the multi-objective optimization design model is accurately evaluated, and a high-precision and low-cost design proxy model is constructed; then, based on the genetic algorithm of adaptive bandwidth kernel density estimation, an adaptive bandwidth kernel density estimation genetic algorithm assisted by a proxy model is introduced to quickly and accurately iterate and solve the Pareto solution set of the multi-objective optimization design model. The present invention significantly improves the use performance of the IGBT module of the wind turbine, ensures its reliability and economy, and effectively improves the efficiency and accuracy of the multi-objective optimization design.

The utility model discloses an insert type swing bending forming die which comprises a male die and a female die, the female die comprises a swing insert, a discharging insert and a bending insert, the swing insert is rotationally connected to a swing fixing block, a rotating shaft is arranged on the swing insert, the axis of the rotating shaft is parallel to the forming face of the swing insert, and the discharging insert is arranged on the swing fixing block. The swing fixing block is provided with an insert seat for accommodating a swing insert and a hole seat matched with the rotating shaft, a swing angle is formed between the swing fixing block and the swing insert, the swing fixing block is provided with a first bending angle, and the rotating shaft and the stress projection plane of the first bending angle are mutually staggered; and the discharging insert and the elastic material ejecting device are matched with each other to discharge the bent workpiece. The overall stress of the die is reasonable, and the design precision of the die is kept under the condition that the service life of the die is prolonged.

The invention discloses a wide-domain time-varying waverider shape design method based on a bending shock wave theory, and relates to near space hypersonic flight vehicle design. And determining a flight Mach number range according to the flight envelope, and determining a design Mach number and a flight height of each level of waverider shape of the wide-domain time-varying waverider shape. A three-dimensional leading edge molded line and a waverider area of a fixed wide-domain time-varying waverider shape are given according to flight mission requirements. A shock wave molded line equation of the basic flow field is adjusted, and according to the geometrical relationship between the design curves, all levels of waverider shapes with the same three-dimensional front edge molded line and waverider area are obtained through rapid solving by means of the bending shock wave theory. According to the plot ratio requirement, the upper surface of the wave rider is constructed into a plane or a convex surface. And combining all levels of waverider shapes to realize wide-range time-varying waverider shape design based on the bending shock wave theory. The waverider appearance can be changed autonomously and continuously according to task requirements and the flight environment, the aerodynamic performance under the flight envelope is effectively improved, and the waverider can adapt to wide-speed-range flight working conditions and various flight tasks.

The invention discloses a bolt connection combined piston skirt top contact special-shaped profile design method. The method comprises the steps that firstly, a finite element simulation model of a piston is established, and radial and circumferential surface deformation of skirt top contact is obtained; fitting is carried out on the surface deformation, and radial and circumferential initial molded lines are obtained respectively; then selecting an optimized target parameter and sampling to obtain a molded line sample; simulating a finite element simulation model corresponding to the molded line sample to train a machine learning agent model; after verification, obtaining a trained machine learning agent model of which the precision meets the requirement; iterative solution is carried out on the basis of the model to obtain an optimal target parameter; and finally, obtaining an optimal molded line according to the optimal target parameters, and performing linear superposition to form a three-dimensional curved surface as an optimal molded surface. By means of a data driving method of machine learning, the artificial intelligence algorithm is innovatively applied to the design of the skirt top contact special-shaped profile of the bolt connection combined type piston.

This invention relates to the field of permanent magnet motor design and optimization technology, specifically a high-efficiency integrated permanent magnet rotor magnetic circuit optimization design system, comprising: a configuration module, a topology generation module, an analytical calculation module, an index evaluation module, a parameter analysis module, and a scheme output module. The system generates multiple candidate magnetic circuit schemes based on initial parameters and performs rapid magnetic field analysis and comprehensive performance scoring using the equivalent magnetic circuit method. The parameter analysis module performs parameter perturbation analysis on the preferred schemes, accurately identifying the key design variables that have the most significant impact on performance; the scheme output module then iteratively optimizes these sensitive variables as the main optimization objects. This technical solution transforms traditional high-dimensional global optimization into low-dimensional directional search targeting key variables, reducing computational complexity and optimization time, effectively improving the efficiency and accuracy of permanent magnet motor rotor magnetic circuit design, and ultimately outputting optimal configuration parameters and a complete magnetic circuit design model.

The invention provides a single diffusion isolation method of a fin type field effect transistor. The method comprises the following steps: forming an annular semiconductor fin body on a substrate; forming a single-diffusion isolation groove in the annular semiconductor fin body through an etching process to isolate a plurality of semiconductor fin body units; forming a protection layer on the top surface, the peripheral side surfaces and the surface of the substrate of the semiconductor fin body unit; removing the semiconductor fin body unit needing to be cut off through etching, removing the second photoetching mask and cleaning the semiconductor fin body unit; removing the edge of the semiconductor fin body unit through etching; removing the protective layer; depositing an insulating dielectric layer on the substrate; and carrying out planarization processing on the insulating dielectric layer. According to the invention, the uniformity and consistency of the fin body structure on the whole chip can be ensured, and the overall performance of the chip is improved. Meanwhile, by means of the manufacturing process, the problem of boundary photoresist height difference caused by the fin body area and the non-fin body area on the surface of the substrate can be avoided, defects in the manufacturing process are reduced, and the product yield is improved.

The application discloses a kind of annular tuning liquid column damper structure design method, device and equipment, method includes: finite element simulation determines the first-order bending natural frequency and structural modal mass of fan tower drum;The tuning frequency of damper is calculated by preset mass ratio and first-order bending natural frequency;According to the first horizontal length and second horizontal length initialization of first bar liquid column and second bar liquid column in damper;First numerical relationship between liquid depth, first horizontal length, second horizontal length and tuning frequency in damper is generated, to determine liquid depth;Second numerical relationship between liquid mass and liquid depth is established to determine other structure parameters;Based on the structure parameters obtained, bidirectional fluid-structure interaction numerical calculation is carried out, and if the obtained damping index meets the preset damping condition, the damper structure parameters are output.The technical scheme provided by the application can obtain structure parameters that make the annular tuning liquid column damper have better damping effect.