373 results about "Machine design" patented technology

The invention relates to the technical field of fluid machinery design, and discloses a fluid machinery through-flow component intelligent design simulation system, which comprises a multi-physics field modeling module, which is used for constructing fluid mechanics, structural mechanics and heat conduction models based on preset boundary conditions and physical attributes; the intelligent optimization decision module is used for constructing and defining a through-flow performance optimization objective function; the cooperative calculation module is used for constructing a comprehensive performance evaluation model based on the candidate design parameter set; the virtual experiment feedback module is used for reconstructing a corresponding through-flow component structure model according to the multi-target evaluation result; and the scheduling control module is used for controlling algorithm path selection and computing resource allocation in the optimization process. According to the method, a method of combining multi-physics field coupling modeling and a dynamic feedback mechanism is adopted, and design parameters are continuously adjusted through simulation data fed back in real time, so that the optimization process can be dynamically updated according to actual operation conditions, and the optimization convergence speed and the overall performance are improved.

The invention discloses a CAD automatic generation system and method based on intelligent model selection and application, and aims at achieving automatic modeling under the multi-modal design requirement. The system comprises a user interaction module for receiving multi-modal input such as natural language, sketch and voice; the intelligent demand analysis module is used for combining an industrial large language model and a product knowledge graph, combining semantic analysis and generating a structured demand; the intelligent model selection calculation module is used for matching the optimal parameter combination and the component list based on a multi-objective optimization algorithm; the CAD automatic generation module calls a parametric modeling engine to generate an editable three-dimensional model; the constraint solving module is used for processing hard constraints and soft constraints in real time and dynamically adjusting model parameters; and the model output and interaction module feeds back a design state and supports user iteration. The system realizes full-process automation from the design intention to the CAD model, improves the design efficiency and accuracy, and is suitable for the fields of mechanical design, intelligent manufacturing and the like.

An electrical propulsion system for a vertical take-off and landing (VTOL) aircraft comprises an electrical motor assembly and an inverter assembly. The inverter assembly comprises a housing, a capacitor assembly, at least one printed circuit board assembly (PCBA), and a plurality of positioning pins. The capacitor assembly comprises a center hole, at least one capacitor, a capacitor housing having at least one busbar, and a plurality of through holes in the capacitor housing. The capacitor assembly and the at least one PCBA are positioned inside the housing. The plurality of positioning pins pass through the through the plurality of through holes of the capacitor housing and the at least one PCBA and are connected to the housing.

The invention discloses a high-precision and high-reliability harmonic reducer tooth profile simulation machining design method, and belongs to the field of precision transmission. A composite cycloid flexible gear tooth profile is designed by establishing a harmonic reducer geometrical relationship model, deducing a flexible gear deformation equation, an accurate rotation angle relationship and a meshing theory based on an envelope method, and a conjugate region and a conjugate tooth profile are calculated by utilizing MATLAB. Actual deformation and theoretical deformation errors of the flexible gear are analyzed through finite element simulation, flexible gear profile parameters are optimized, an actual neutral layer curve is generated, and then a rigid gear profile is enveloped and calculated. The tooth profile design adopts a non-zero inclination angle composite cycloid, so that the meshing area is expanded by more than 30%, and the maximum stress of the flexible gear is reduced by 22.75% in combination with a linear modification method and a finite element modification method. In addition, through a multi-physical field simulation verification system (including static deformation, dynamic contact and fatigue life prediction) and a neural network optimization tooth shape parameter, the transmission performance is remarkably improved. According to the method, the torsional rigidity can be improved by 66%, and the transmission error is controlled within a high-precision range.

The invention discloses an intelligent robot prototype aided design method based on a knowledge graph, and the method comprises the steps: 1, data acquisition: data sources are structured data and unstructured data stored in a third party and an enterprise; step 2, knowledge extraction: inputting the data obtained in the step 1 into a knowledge extraction layer, performing knowledge extraction through a vertical field large language model, extracting structured information and knowledge from a text, including entity extraction, relationship extraction and attribute extraction, forming a relationship triple, and extracting the structured information and knowledge from the text; carrying out complex relation modeling among mechanical design knowledge graph entities in combination with a graph neural network so as to improve the accuracy of entity recognition and relation extraction; 3, performing knowledge fusion processing; and 4, data storage. According to the method, complex relation modeling between entities is carried out in combination with GNN, so that the accuracy of entity recognition and relation extraction is improved, more intelligent decision support functions such as an inference engine based on a knowledge graph are added, and the intelligent level of design is further improved.

The invention provides an electromagnetic compatibility design method and device based on a vehicle-mounted audio system. The method comprises the following steps: determining a target level of electromagnetic compatibility; performing risk assessment on the device in the drawing to obtain a risk assessment result; selecting clock frequency points of signal radiation from the devices meeting the design requirements; performing simulation verification on the vehicle-mounted audio system, and judging whether the vehicle-mounted audio system reaches a target level or not; if not, optimization design is carried out; if yes, carrying out near-field testing on the whole machine; judging whether the near-field test reaches a target level or not; if not, optimization design is carried out; if yes, performing a far-field test on the whole machine; judging whether the far-field test reaches a target level or not; if not, optimization design is carried out; if yes, ending; through simulation optimization, it is ensured that the electromagnetic compatibility of the whole machine design can reach an expected target level, and therefore the quality and reliability of products are remarkably improved; the research and development period can be shortened, and the research and development cost is reduced.

The invention provides a collaborative optimization method for a single-suction centrifugal impeller, and belongs to the technical field of fluid machinery design and optimization. Comprising the following steps: parameterizing a blade arc; based on a Hicks-Henne function, optimizing and correcting the function of the blade outlet angle, and determining an initial design parameter range of a curve needing to be fitted and a corresponding target; constructing a sample point database through a hyper-Latin sampling method in combination with a CFD numerical simulation technology; constructing a GWO-BP neural network model based on a grey wolf optimization algorithm, and training and predicting the model by using the sample point database; taking a prediction result of the GWO-BP neural network model based on the grey wolf optimization algorithm as a fitness function of a non-dominated sorting genetic algorithm NSGA-II; and optimizing the fitness function through a non-dominated sorting genetic algorithm NSGA-II to generate a Pareto frontier solution.

The invention relates to the field of mechanical design and manufacturing, and provides a three-dimensional model processing method, a training and application method of a system, equipment and a medium, and a target boundary representation three-dimensional model is obtained based on a preset complex manufacturing feature model and a boundary representation three-dimensional model. The complex manufacturing feature model is added to the boundary representation three-dimensional model containing the simple structure manufacturing feature model, so that the boundary representation three-dimensional model containing the simple structure manufacturing feature model and the complex structure manufacturing feature model is synthesized. According to the three-dimensional model processing scheme provided by the invention, the complex manufacturing feature model is added in the boundary representation three-dimensional model, so that when the boundary representation three-dimensional model obtained by the processing scheme is used for training an image classification system, the image classification efficiency is improved; the generalization ability of the image classification system and the classification accuracy of the manufacturing feature model in the boundary representation three-dimensional model can be improved, so that the production efficiency and quality of process products are improved.

An electrical propulsion system for a vertical take-off and landing (VTOL) aircraft comprises an electrical motor assembly and an inverter assembly. The inverter assembly comprises a housing, a capacitor assembly, at least one printed circuit board assembly (PCBA), and a plurality of positioning pins. The capacitor assembly comprises a center hole, at least one capacitor, a capacitor housing having at least one busbar, and a plurality of through holes in the capacitor housing. The capacitor assembly and the at least one PCBA are positioned inside the housing. The plurality of positioning pins pass through the through the plurality of through holes of the capacitor housing and the at least one PCBA and are connected to the housing.

The invention discloses an AI-AD intelligent machine design method and system based on a learning-generation mode. The method comprises the following steps: S1, enabling an AI-AD intelligent mechanical design system to understand design knowledge at first; s2, compiling a workflow with low codes; s3, compiling a Prompt strategy of the design Agent and a called knowledge base; s4, repeating the steps S1 to S3, and compiling various agents needing to complete various specific design functions; s5, according to the designed various agents, a multi-agent self-organizing framework is utilized, and product creation type design is completed; and S6, according to the generated design result, generating a VBA file and storing the VBA file in the cloud. And S7, the SW establishes a conversation with the agent through a back-end API of the agent, timely reads a VBA code of the cloud for modeling, and outputs a model. According to the invention, a system structure of knowledge processing, cloud data storage, SolidWorks-based secondary development modeling and a human-computer interface module is constructed, Agents are enabled to learn at first, then design is created, and a 3D model meeting user requirements is generated, so that the current situation that knowledge engineering has extremely high requirements for practitioners' admission threshold can be reduced.

The invention discloses a quick assembly and disassembly type modular telescopic supporting structure, and belongs to the field of general machinery design. The problems that a traditional supporting structure is low in disassembly and assembly efficiency, poor in adjusting precision and inconvenient to store and transport are solved. The structure comprises an outer cylinder, a self-locking telescopic structure, a magnetic suction quick-connection node structure and folding devices, the bottom end of the outer cylinder is movably connected with the magnetic suction quick-connection node structure, an inner cavity is connected with the self-locking telescopic structure in a clamped mode, and the folding devices are annularly fixed to the surface of the magnetic suction quick-connection node structure. The self-locking telescopic structure adopts a self-locking telescopic unit of a hexagonal nested sleeve, and is matched with an elastic ratchet bar, a slope clamping block and a compression spring, so that single-hand downward pressure stepless regulation is realized, locking is realized by virtue of friction and occlusion, the vertical deviation is small, and the bearing capacity is high; six permanent magnets are arranged at the bottom and an inner cavity of the magnetic attraction quick connection node, are distributed in an annular array mode and are quickly spliced by rotating and clamping the bottom end of an outer cylinder, electric power is not needed, and the bolt risk is avoided. And the folding storage mechanism supports quick disassembly of the supporting legs and is convenient to store and carry.

The invention relates to a grabbing manipulator positioning device and method for quickly assembling and disassembling a drill, and belongs to the technical field of coal mine machinery design. The device comprises a drill rod transfer device, a drill rod box, a grabbing manipulator, a mounting frame, a driving motor, a PLC (Programmable Logic Controller), an induction block, a proximity switch sensor and the like. The sensing block is aligned with the corresponding device or the drill rod groove in position, and the proximity switch sensor is arranged below the driving motor. During working, the PLC controls the driving amount of the driving motor according to the signal change of the proximity switch sensor. The grabbing manipulator is driven to move, sensor signals are monitored, the driving amount of the driving motor is controlled according to the number of times, speed reduction and precise stopping are conducted when a target is approached, and drilling rod grabbing or releasing is completed. By means of the mode, rapid and accurate positioning can be achieved, the positioning speed and precision are improved, the drilling and unloading efficiency is improved, the operation stability is improved by adopting an intelligent control strategy, and the system flexibly adapts to different drill rod groove numbers and is high in universality and expandability.

The invention relates to the field of machining cutting equipment, and discloses a machining cutting device for mechanical design and manufacture, which comprises a working table, a first movable table is movably mounted on one side of the front end of a vertical frame through a guide rail, a second movable table is arranged below the first movable table, and a rotating shaft is movably mounted in the inner middle of the second movable table; one end of the rotating shaft extends to the outside of the second movable table and is fixedly provided with a cutting blade, the two sides of the bottom end of the first movable table are connected to the top end of the second movable table through reset springs, a first driving bevel gear is fixedly installed on the outer diameter of the middle of the rotating shaft, and a short shaft is movably installed on the inner top of the second movable table. Different workpieces can be stably clamped, surface damage is avoided, precise cutting is achieved through the two-way spiral groove, the tool load is reduced through vibration cutting, the service life is prolonged, burrs are reduced, operation is easy and convenient, the structure is compact, and the machining quality and efficiency are remarkably improved.

The invention relates to the technical field of fluid machine design and artificial intelligence crossing, in particular to an optimization design method and system oriented to turbomachinery, a storage medium and a computer program. According to the method, a standardized data bus of a parameter layer, a configuration layer, a geometric layer and a result layer penetrates through an average line, parameterized geometry and multi-objective optimization are carried out, thermophysical property calibers are unified, and sample-level archiving and playback are achieved. Through LHS / Sobol sampling, Kriging proxy, NSGA-II and other algorithms, isentropic efficiency, pressure ratio and structure / noise indexes are collaboratively optimized under the condition that constraints of mass flow, minimum thickness, tip clearance and the like are met; the system is coupled with CFD / FEM through an adapter, and supports GUI and batch processing. Compared with the prior art, the design efficiency, the cross-module consistency and the result traceability are improved, and a manufacturable Pareto optimal blade scheme is obtained.

The utility model discloses an angle-adjustable mounting bracket, which belongs to the technical field of machining design, and comprises an equipment mounting bracket, the equipment mounting bracket comprises a bottom plate, side plates and reinforcing plates, the two sides of the bottom plate are fixedly connected with the side plates on the corresponding sides, the opposite sides of the two side plates are fixedly connected with the reinforcing plates on the corresponding sides, and the reinforcing plates are fixedly connected with the bottom plate. The bottoms of the two reinforcing plates are attached to the top of the bottom plate, three angle adjusting holes are formed in each side plate, and the adjustable range of the angle adjusting holes is plus or minus 15 degrees. According to the utility model, through the arrangement of the angle adjusting hole, the adjustment of the installation angle of an instrument or equipment is realized through the tightness of the fastening screw, so that the hole opening position of the installation hole has a fault-tolerant rate, and the trial and error frequency can be reduced, thereby enabling the field installation and debugging to be more convenient, improving the success rate of installation and debugging, and enabling the field operation to be more efficient.

Designs 1-2 are used for cleaning floors, and the main appearance characteristics lie in the shape thereof, including a middle portion that is cylindrical-shaped, an upper portion that is rod-shaped, and a lower portion that is roughly cuboid-shaped; design 1 is principle design and design 2 is a variant; cutting surfaces are included in the designs to form lines gradually disappearing on the surfaces to provide smooth transition between surfaces; reproductions 1.9 and 2.9 are enlarged views for reproductions 1.3 and 2.3 respectively, the dash-dot lines illustrate boundaries of enlarged portions and form no part of the claimed designs.

The invention relates to the technical field of impeller design optimization, in particular to a fuel cell compressor impeller design optimization method, which comprises the following steps of: firstly constructing a parameter system of compressor impeller design, defining a design variable set and generating an impeller geometric model through parametric modeling; establishing a multi-objective function system, coordinating aerodynamic efficiency, structural strength and quality objective conflicts, and setting manufacturing and safety constraint conditions; then, key design variables are screened through global sensitivity analysis, and the space is optimized in a dimensionality reduction mode; a Pareto optimal solution set is generated by adopting a gradient enhanced NSGA-II algorithm, and convergence is accelerated in combination with gradient information; and finally, verifying the candidate solution through a multi-level verification system, and correcting the design space. According to the method, the design efficiency and performance of the fuel cell compressor impeller can be effectively improved, the method has wide application prospects in high-speed impeller mechanical design in the fields of aviation, automobiles and the like, and cross-platform multiplexing design criteria and empirical formula libraries are supported.

The application relates to the technical field of gear shaft welding, and particularly discloses a machining device for a planetary gear shaft, which comprises a base, a mechanical arm body, a welding gun, a material pushing structure, a material discharging structure and a butt joint structure. The base is convex, and the base has left and right ends and a front end. The mechanical arm body is fixedly arranged on the upper wall of the front end of the base. The welding gun is fixedly arranged on the mechanical arm body. The material pushing structure is fixedly arranged on the upper wall of the right end of the base. The material discharging structure is fixedly arranged on the upper wall of the base and close to the material pushing structure. The butt joint structure is fixedly arranged on the upper wall of the left end of the base. The machining device realizes efficient, flexible and automatic operation of gear shaft welding through innovative mechanical design and automatic technology, has the advantages of high adaptability, high efficiency and stability, cost reduction, easy maintenance, welding quality improvement and the like, and is suitable for various industries and customized production requirements.

The invention discloses a collaborative design method and device for a gear transmission system facing a marine environment, and relates to the field of mechanical design, and the method comprises the steps: obtaining the working depth of the gear transmission system in the marine environment, and calculating the environmental parameters of the ocean based on the depth and a first relation; state parameters of lubricating oil used in the gear transmission system are calculated according to the environment parameters and the second relation; selecting an initial gear material from a material performance parameter database according to the state parameters of the lubricating oil and the environmental parameters of the ocean; selecting an initial configuration in the configuration database according to the design requirement of the gear transmission system; and taking the initial gear material and the initial configuration as initial conditions, inputting the gear material and the configuration into a coupling performance prediction model to predict and obtain a performance index, and carrying out iterative solution on an objective function by adopting a multi-objective optimization algorithm under constraint conditions to obtain the optimal gear material and configuration. The method overcomes the limitation of a traditional separated design, and can capture a complex coupling relationship.

The utility model relates to the technical field of bee-keeping industry production machinery design, in particular to a wax cutting, worm clamping and pulp digging all-in-one machine which is characterized in that a royal jelly platform base strip frame is vertically erected on an all-in-one machine rack, a royal jelly platform base strip moving device is arranged below the royal jelly platform base strip frame, and a beewax cutting knife is arranged at the outward moving end of the royal jelly platform base strip moving device; the beewax cutter is arranged on the base bar, the blade of the beewax cutter faces inwards, the honeycomb imaging device is located on one side of the insect clamping mechanical arm, the insect clamping mechanical arm is a double-needle rotary insect clamping mechanical arm, the honeycomb imaging device and the double-needle rotary insect clamping mechanical arm face the royal jelly platform base bar, and the royal jelly platform base bar is transferred to the royal jelly digging device through the base bar overturning device to dig royal jelly and discharge royal jelly. The all-in-one machine can fully automatically complete the processes of wax cutting, worm clamping, transferring and royal jelly digging in the royal jelly production process, the whole production process can be fully automatically completed by equipment except for feeding, a large amount of labor force is saved, the royal jelly production efficiency is high, and the occupied area is small.

The utility model relates to the field of jacking moving and cutting machine design, in particular to a jacking moving and cutting machine convenient to adjust. Comprising a jacking plate, a jacking assembly connected with the jacking plate and used for driving the jacking plate to vertically ascend and descend, a mounting plate mounted on the jacking plate, and a lifting assembly mounted between the jacking plate and the mounting plate and used for driving the jacking plate to vertically ascend and descend. The horizontal moving assembly is used for driving the mounting plate to move in the first horizontal preset direction and the second horizontal preset direction relative to the jacking plate, and the feeding assembly is mounted on the mounting plate and used for bearing and conveying objects. According to the jacking moving and cutting machine convenient to adjust, through the arrangement of the jacking assembly and the horizontal moving assembly, the horizontal position of the feeding assembly can be adjusted while the feeding assembly ascends and descends, so that the feeding assembly is effectively aligned with a feeding port of the next working procedure, and the feeding efficiency of the next working procedure is improved. And therefore, the feeding stability of the feeding assembly is improved.

The invention relates to the technical field of digital mechanical design, and particularly provides a two-dimensional multi-communication surface domain construction method, device and equipment and a medium, and the two-dimensional multi-communication surface domain construction method comprises the steps: obtaining a geometric figure file of a to-be-analyzed target aero-engine; thirdly, constructing an undirected graph to be processed based on geometric feature data in the geometric graph file, and performing triangulation processing on a first endpoint set in the undirected graph to be processed to obtain a triangulation graph; finally, constructing a dual graph of the triangulation graph, and determining a multi-connected surface domain information set according to a plurality of connected components in the dual graph; according to the invention, the recognition accuracy and efficiency of the two-dimensional multi-connected surface domain can be improved.

The present invention relates to the technical field of pre-prepared food production, and specifically to an automatic quantitative conveying device for seasonings for pre-prepared food production, comprising a discharge rack, wherein the top of the discharge rack is fixedly connected to a quantitative discharge mechanism, wherein the quantitative discharge mechanism comprises a quantitative discharge bottom rack, and the top of the quantitative discharge bottom rack is fixedly connected to a quantitative discharge component. The present invention realizes efficient, precise and automated operation of an automatic quantitative conveying device for seasonings for pre-prepared food production by providing a discharge rack and a quantitative discharge mechanism. Through precise mechanical design and linkage mechanism, the present invention ensures that each seasoning can be accurately received and conveyed to the pre-prepared food production equipment according to a preset amount. The device not only improves production efficiency, but also greatly reduces errors in manual operation, bringing significant technological innovation to the pre-prepared food production industry. In addition, through the ingenious design of triangular abutment plates and reverse triangular abutment plates, the present invention effectively solves the problem of seasoning residue.

The invention discloses a test device for monitoring separation and attitude locking of a host satellite and a boarding load, belongs to the field of mechanical design and test, and aims to overcome the defects of insufficient simulation in a microgravity environment and inaccurate satellite attitude data acquisition in an existing boarding load and host satellite separation test. The air foot supporting system enables the simulation device to be in a free floating state; the simulation device simulates the separation of the host satellite and the boarding load; the monitoring device monitors dynamic parameters in the separation process of the host satellite and the hosting load; the host satellite and the hosting load are connected through a mechanical interface system, and the host satellite and the hosting load which are connected are driven to be locked or separated through locking or separating of the mechanical interface system; the push rod motor is used for adjusting the inclination angle of the mechanical interface system so as to adjust the separation angle of the host satellite and the boarding load. The method is used for simulating separation of the host satellite and the hosting load, and attitude data in the separation process is obtained for subsequent analysis.

The invention relates to the field of scroll compressor design, and discloses a full-meshing double-vortex-ring scroll compressor diffusion hole machining design method which comprises the steps of constructing an initial design domain, defining a multi-working-condition working point set and a fluid dynamic control equation determined by compressor operation parameters to construct a multi-working-condition analysis model, establishing a solid isotropic material penalty model, and designing a diffusion hole of a full-meshing double-vortex-ring scroll compressor according to the solid isotropic material penalty model. Multi-working-condition robustness topological optimization with the total pressure loss weighted sum under all the weighted working conditions as the target is executed, a discrete pseudo-density field is obtained, parameterized geometric reconstruction is conducted on the discrete pseudo-density field, and a diffuser hole parameterized geometric model controlled by parameter vectors is obtained. By introducing multi-working-condition robustness topological optimization and integrated dynamic machining constraint linkage re-optimization, remarkable robustness of aerodynamic performance of the diffusion hole in a wide working range is achieved, it is ensured that the diffusion hole meets the high-quality and high-efficiency numerical control machining requirements congenitally, and the design efficiency and manufacturing feasibility of the diffusion hole of the scroll compressor are greatly improved.

The utility model discloses a bottom-drawn paper towel folder, including a bracket, on which a paper feed roller assembly for feeding paper, an upper knife roller for pressing paper towels, a paper folding roller assembly for folding paper towels, a fork assembly for pulling paper towels off the paper folding roller, a paper separation module for separating paper towels, and a conveying mechanism for conveying paper towels are sequentially installed from top to bottom. The bottom-drawn paper towel folder designed by the utility model realizes automatic and accurate paper towel folding through a series of ingenious designs. First, the paper feed roller assembly is used to convey the paper towels to the center of the frame, and then the two paper folding roller assemblies are used to complete the preliminary folding. The sides of the two paper folding rollers are provided with V-grooves arranged at intervals, which cooperate with the lower blade to enable the paper towels to be smoothly pressed into the V-grooves and complete the preliminary folding.

The invention relates to the technical field of fluid machinery, in particular to a water distribution ring pipe with an adjustable pitch diameter and an impulse turbine system. The water distribution ring pipe comprises a water distribution main pipe which is of an annular structure and is arranged on the outer side of the rotating wheel; and the water distribution branch pipes are movably connected with the water distribution main pipe, the water distribution branch pipes are arranged towards the rotating wheels, and the spraying directions of the water distribution branch pipes are adjusted to be matched with the rotating wheels with different pitch circle diameters through the movable connection of the water distribution branch pipes and the water distribution main pipe. According to the water distribution ring pipe with the adjustable pitch circle diameter and the impulse turbine system, the spraying direction of the water distribution branch pipes can be matched with rotating wheels with different pitch circle diameters by adjusting the positions of the water distribution branch pipes; the whole set of water distribution ring pipe system does not need to be additionally designed and machined, other water distribution ring pipe assemblies do not need to be disassembled and replaced, the rotating wheels with different pitch circle diameters can be subjected to model tests only through one water distribution ring pipe, the machining design process is simplified, time and labor are saved, installation is convenient, working efficiency is improved, and economical efficiency is good.

The invention relates to the field of fluid machinery design, in particular to a multi-assembly collaborative optimization combined type gas-liquid centrifugal pump. Comprising an impeller, a flow guide assembly and a volute. The impeller comprises a cover plate and a hub arranged on the cover plate, blades are installed on the hub and divided into a front impeller section and a rear impeller section in the radial direction, a segmented gap is formed between the front impeller section and the rear impeller section, a plurality of backflow holes are symmetrically formed in the cover plate, and the impeller is provided with an impeller inlet and an impeller outlet. A turbulent flow structure is arranged on the face, away from the blades, of the cover plate. In the design optimization of the centrifugal pump, the gas-liquid mixed transportation performance of the centrifugal pump can be effectively improved through a multi-assembly coupled composite structure; the sectional type blades are adopted, a three-dimensional rotary-cut flow field can be formed in the impeller through the synergistic effect of flow guide of sectional gaps and circulation of backflow holes, retained air mass can be efficiently broken, gas phase aggregation can be effectively restrained, and good conditions are created for gas-liquid mixed conveying.

The invention provides a high-torque-density design method for an electric spindle, and belongs to the technical field of electric spindle design, and the method comprises the following steps: step 1, carrying out architecture setting on each part of the electric spindle to obtain a basic mechanism of the electric spindle; 2, performing complete machine design according to the basic architecture, and performing simulation modeling; and 3, designing a plurality of physical field characteristic verifications, completing the design after each characteristic is verified to be qualified, and returning to the step 1 and the step 2 to carry out design adjustment until all physical field characteristics are verified and the design is completed if some characteristics are verified to be unqualified. The torque density of the motorized spindle is improved, the output torque under the same size is greatly improved, miniaturization and light weight of the motorized spindle are achieved, installation and maintenance are convenient, the overall weight is reduced, the high performance of the motorized spindle is enhanced, higher efficiency and better dynamic response and reliability are achieved, and through physical field characteristic verification, the reliability of the motorized spindle is improved. Verification for each characteristic may be achieved.

The utility model relates to the technical field of blood station blood donation equipment, in particular to a blood bag plug breaking device which comprises a base and a plug breaking piece, the plug breaking piece is arranged on the base, a groove is formed in the base, and a blood bag plug breaking tee joint is arranged in the groove and penetrates through the plug breaking piece. The plug breaking-off piece automatically acts to conduct the plug breaking-off tee joint; according to the blood bag plug breaking-off device, automation and mechanical design are ingeniously combined, intelligent and automatic operation of a blood bag plug breaking-off tee joint (a multi-way valve) is achieved through the precise base platform and the high-efficiency plug breaking-off piece system, and the blood bag plug breaking-off device is high in practicability and high in practicability. The core of the device is that a steering engine (especially a high-precision stepping motor) is used as a power source to drive a specially-made rotating rocker arm to accurately act, the U-shaped design of the rocker arm perfectly fits a groove structure, and it is ensured that the blood bag tee joint can be accurately placed in the rocker arm and can be rapidly conducted under automatic control.