14134 results about "Impeller" patented technology

The invention relates to the technical field of high-pressure dredge pump simulation calculation, and discloses a construction and application method of a high-pressure efficient dredge pump simulation calculation model. A model is established based on dynamic fluid-solid coupling parameters (mud pulsating pressure, impeller dynamic stress and the like), soil multiphase rheological parameters (particle phase volume fraction, viscous resistance coefficient and the like) and pipeline transient resistance parameters (transient pressure drop gradient and the like), and factors such as rotating speed-power matching and the like are incorporated to calculate an operation envelope and a critical failure threshold. A multi-physics field coupling analysis system comprising parameter configuration, dynamic simulation (integrating a flow field and a structural vibration solver) and a safety evaluation module is developed, after actually measured data and self-defined parameters are input, dynamic flow velocity distribution, pressure pulsation characteristics and the like are obtained through fluid-solid bidirectional coupling calculation, and an optimal configuration scheme is generated. The system supports database management, multi-rheological model matching and three-dimensional visualization, the simulation precision and the engineering efficiency are improved, and support is provided for performance optimization and safety evaluation of the high-pressure working condition.

A blood pump includes an impeller; a drive shaft coupled to the impeller and configured to rotate with the impeller; a motor configured to drive the impeller; and a bearing assembly disposed adjacent the motor and configured to receive an end of the drive shaft. The bearing assembly includes a bearing, where the end of the drive shaft is at least partially rounded, and the where the bearing includes a concave depression defined in a first side of the bearing, where the depression is configured to receive the end of the drive shaft. The bearing assembly may include a lubricant chamber configured to hold a lubricant.

The invention relates to the technical field of wind power generation. The impeller imbalance detection method based on multi-source data fusion comprises the steps that operation state data of a draught fan unit and environment data of corresponding time are obtained, and a multi-source data set is obtained; preprocessing the multi-source data set to obtain a preprocessed data set; feature parameters in the preprocessed data set are extracted, data fusion is carried out, and a multi-source feature fusion vector is constructed; according to the multi-source feature fusion vector, constructing a time sequence prediction model based on a gating circulation unit, and predicting a theoretical vibration baseline value under the current working condition in real time; and calculating a deviation degree between an actual vibration value and a predicted baseline through residual analysis, dynamically adjusting a detection threshold, and triggering imbalance early warning when the deviation degree exceeds the threshold. The problems that the accuracy of a detection result of a traditional impeller imbalance detection method is affected by various factors, misjudgment and missed judgment are prone to occurring, and the requirement of a modern wind power generation system for high-precision fault detection cannot be met are solved.

The invention discloses a welding positioning device for impeller machining and a positioning method thereof, and relates to the technical field of impeller machining, the welding positioning device comprises a workbench and a positioning assembly, the center of the top of the workbench is rotationally connected with a storage table, a rack is arranged at the outer end of the top of the workbench, and a lifting assembly is arranged in the middle of the rack; the positioning assembly is arranged at the outer end of the lower portion of the lifting assembly and comprises a polished rod, a limiting sleeve, a guide part, a rubber mat, a positioning spring, a baffle, a positioning rod and a tooth groove. After the impeller base plate is placed on the upper portion of the storage table, the limiting sleeve can be lifted, the blades are inserted into the bottom of the limiting sleeve, at the moment, the upper ends of the blades can be guided through the guiding part, the convenience of inserting the blades is improved, the shape of an inner groove of the limiting sleeve is matched with the shape of the blades, and therefore the blades can be conveniently inserted. And after the blade is placed, the positioning spring can push the baffle, so that the limiting sleeve tightly presses the blade on the impeller chassis.

The invention provides a fluid-structure interaction vibration simulation and suppression method for a water-jet propeller, and belongs to the field of numerical simulation of computational fluid mechanics. The method comprises the following steps: establishing a finite element model of a water-jet propeller impeller-shafting coupling system; performing dry mode and wet mode comparative analysis on the finite element model by utilizing a finite element method, and verifying the effectiveness of the model; dividing finite element grids of a structural domain and a flow field domain; establishing a fluid-solid coupling model; on the basis of bidirectional fluid-solid coupling numerical calculation, the flow field speed and acting force are solved through CFD, the structure movement speed and displacement are updated, a flow field grid is further updated, flow numerical calculation continues to be conducted, and iteration is conducted till the simulation time ends; flow-induced vibration characteristics are analyzed through post-processing, and the vibration amplitude is restrained by adjusting the mass center position of the impeller airfoil. According to the method, the bidirectional fluid-solid coupling model of the impeller-shafting system of the water-jet propeller is constructed, structural deformation and transient flow field information are directly associated, and the hydrodynamic performance is improved.

The utility model provides a cantilever type magnetic drive pump, and belongs to the technical field of pumps. The technical problem that an existing cantilever type magnetic drive pump is not good enough in sealing effect is solved. A cantilever type magnetic drive pump comprises a pump shell and a motor shell, a stator assembly is fixedly installed between the pump shell and the motor shell, a rotor assembly rotating relatively is embedded in the stator assembly, an impeller is fixedly connected to the rotor assembly, the stator assembly comprises a stator shielding sleeve and a stator assembly wrapped by the stator shielding sleeve, and a concave cavity is formed in the middle of the stator shielding sleeve. The bottom of the concave cavity protrudes towards the impeller to form an installation column, a reinforcing piece is arranged in the installation column, the rotor assembly is embedded into the concave cavity and fixedly and rotatably arranged outside the installation column in a sleeving mode, the installation column penetrates through the middle of the rotor assembly, and the impeller is fixedly connected to the rotor assembly. The sealing device is good in sealing effect and stable in rotation.

An intravascular blood pump comprises a pumping device including an impeller and an electric motor for driving the impeller. A rotor of the electric motor is rotatable about an axis of rotation and coupled to the impeller so as to be able to cause rotation of the impeller. An outer sleeve forms a casing of the pumping device, wherein stator components are fixed inside the outer sleeve by means of a casting compound. In a method of manufacturing the blood pump the stator components are placed on a molding base, including the outer sleeve to thereby form an interspace between the molding base and the outer sleeve in which the stator components are disposed. The casting compound is then injected into the interspace via the molding base to fix the stator components inside the outer sleeve. The outer sleeve preferably comprises a magnetically conductive material to form a yoke of the electric motor.

Apparatus and methods are described including a ventricular assist device that includes an impeller configured to be placed inside a left ventricle of a subject. A driving magnet is coupled to a motor and is rotated by the motor. A driven magnet is magnetically coupled to the driving magnet and is rotated by the driving magnet. A drive cable extends from the driven magnet and imparts rotational motion from the driven magnet to the impeller. A set of sensors is configured to detect a magnetic phase difference between the driven magnet and the driving magnet. A computer processor receives the detected magnetic phase difference and determines a physiological parameter of the subject, at least partially in response thereto. Other applications are also described.

According to the implantable magnetic suspension blood pump, an impeller is suspended in a containing cavity of a pump shell and can rotate around the central axis of the pump shell, and a motor comprises a motor stator assembly arranged in the pump shell and a rotor magnet array arranged on the impeller; the magnetic suspension device comprises an electromagnet arranged in the pump shell and a suspension magnet assembly arranged on the impeller. Active electromagnetic suspension force provided by the electromagnet and passive permanent magnet bias suspension force provided by the suspension magnet assembly act together to enable the impeller to maintain a balanced suspension state in the axial direction and the radial direction. The motor and the magnetic suspension device are independently controlled to effectively reduce the negative influence of low signal detection accuracy caused by magnetic field coupling, and the hybrid magnetic suspension structure reduces the power consumption of the magnetic suspension device; the arrangement mode of the electromagnet and the motor stator assembly enables the whole structure to be compact, and the size and the weight of the blood pump are reduced; the suspension position of the permanent magnet is accurately controlled by accurately controlling the gap and the position relation between the electromagnet and the suspension magnet assembly.

The invention discloses an intelligent fluidized bed jet mill, and relates to the technical field of material crushing and grading equipment. The equipment comprises a hardware part and a control module, wherein the hardware part consists of a crushing area, a feeding area and a grading area. Low-temperature and high-pressure nozzles uniformly distributed on an annular gas distribution disc are adopted in the crushing area; the grading area is provided with a flow dividing cylinder and a conical flow guide plate for separating ascending airflow and falling coarse particles; the control module collects particle size data of powder in real time, predicts future particle size distribution in combination with an LSTM network, dynamically optimizes the rotating speed of a grading impeller through a particle swarm algorithm, and achieves cooperative control over smashing efficiency, particle size precision and energy consumption with the effective output per unit energy consumption as the optimization target. Through low-temperature embrittlement, an anti-pollution structure and an intelligent algorithm, the problems that traditional equipment is high in energy consumption, extensive in particle size control and prone to contaminating materials are solved, and the device is suitable for fine smashing of high-purity or high-hardness materials.

Side channel compressor (1) for a fuel cell system (2) for compressing a gaseous medium, comprising a housing with a first housing part (3) and a second housing part (4). According to the invention, a compressor wheel assembly (10) and / or a respective bearing (19, 20) has, on its end face facing the second housing part (4), in particular a first end face (30), a cover-shaped sealing element (13) which at least almost completely covers the bearings (19, 20) and / or a bearing device (9) orthogonal to the axis of rotation (R), wherein the cover-shaped sealing element (13) is at least indirectly connected to a hub (16) in such a way that fluidic encapsulation of an interior space (27) of the hub (16) with respect to an environment (29) of the compressor wheel assembly (10) can be achieved. The invention further relates to a fuel cell system (2) with a side channel compressor (1) according to the invention.

The utility model provides a purifier. The purifier comprises a shell, a filtering part and an impeller. The shell is provided with an air inlet and an air outlet; the filtering part is arranged at the air inlet; the impeller is arranged in the shell and can drive gas to enter the shell from the gas inlet, and the gas flows out of the shell from the gas outlet after flowing through the filtering part, and the impeller comprises a cover body, blades and a flow guide ring; the multiple blades are arranged in the circumferential direction of the impeller and connected with the cover body. The flow guide ring is located on the sides, away from the cover body, of the blades and connected with the blades. Wherein the flow guide ring extends in the axial direction away from the impeller in an arc shape from the side away from the cover body to the side close to the cover body, on one axial section of the impeller, the radius of the outer surface of the flow guide ring is the first radius, and the first radius is larger than or equal to 7.8 mm and smaller than or equal to 20.6 mm; on one axial section of the impeller, the central angle corresponding to the outer surface of the flow guide ring is larger than or equal to 52.6 degrees and smaller than or equal to 86.3 degrees. Therefore, the work efficiency is improved.

The invention provides a gas compressor moving blade tip clearance measuring method and device, and belongs to the field of aero-gas turbine gas compressors. The problems of low measurement precision, low measurement efficiency and small measurement range in the prior art are solved. The method comprises the following steps that an angle encoder is installed on a main shaft, and a three-dimensional laser profile measuring instrument is arranged on the blade tip side of a blade at intervals; the impeller is rotated, the three-dimensional laser profile measuring instrument scans the blade tip, and three-dimensional point cloud data of the whole circle of blade tip profile are obtained; after the casing and the impeller are assembled, a plurality of continuous blades on the impeller are detached, and the three-dimensional laser profile measuring instrument is arranged at the vacant position of the impeller; the impeller is rotated, the three-dimensional laser profile measuring instrument scans the inner wall of the casing, and three-dimensional point cloud data of the whole circle of the inner wall of the casing are obtained; processing data; registering the processed three-dimensional point cloud data of the blade tip contour and the processed three-dimensional point cloud data of the inner wall in the same coordinate system to form a registration model; and the blade tip clearance value of the whole circle is calculated. The method is mainly used for measuring the blade tip clearance.

The invention belongs to the technical field of fuel cells, and particularly relates to a high-dimensional multi-target multi-working-condition optimization method and system for a fuel cell centrifugal air compressor, and the method comprises the steps: constructing a fuel cell air compressor performance analysis and optimization system, a comprehensive performance test platform is built, a multi-physics field coupling CFD simulation model is built, and the simulation and optimization efficiency is improved in combination with a machine learning algorithm; the pressure ratio and isentropic efficiency are defined as optimization targets based on fuel cell system requirements, and the performance of the air compressor is evaluated through experiment and simulation data; a multi-objective multi-population optimization method, an archive sharing technology, a genetic algorithm and the like are fused to establish an MMPS algorithm, and high-dimensional multi-objective optimization is carried out on related structure parameters of an impeller, a volute and a diffuser. The technical problems that the multi-target collaborative optimization requirement of an existing fuel cell centrifugal air compressor is difficult to meet, the high-dimensional variable optimization difficulty is large, and complex flow characteristic control is difficult are solved.

A mechanical circulatory support (MCS) system having an axial rotary blood pump with an impeller housing having a cylindrical pocket for receiving a magnet and closed by an end ring, requiring only a single circumferential weld and an axial weld. The impeller includes a shaft and one or more blades extending radially from the shaft. An inner and outer wall extend longitudinally from the shaft defining the pocket therebetween. A magnet array is positioned within the pocket and configured to be magnetically driven by an output shaft of a motor. The end ring is coupled to the end of the pocket opposite the shaft thereby encapsulating the magnet array within the pocket. Alignment holes may be provided within a floor of the pocket for orienting and balancing the impeller.

A blood pump includes an impeller; a drive shaft coupled to the impeller and configured to rotate with the impeller; and a rotor coupled to the drive shaft and configured to rotate with the drive shaft. The rotor includes a driven magnet having an outer surface. A corrosion-resistant coating may be disposed on the outer surface of the driven magnet. A stator is disposed adjacent the rotor and configured to drive the rotor, causing the rotor to rotate; and a motor is configured to drive the stator. A protection assembly may be disposed adjacent the stator and configured to receive an end of the drive shaft, and may include a protection assembly housing enclosing a protective fluid chamber, the protective fluid chamber including the driven magnet and at least a portion of a bearing configured to engage the end of the drive shaft.

The invention provides a single-point mooring floating type fan platform capable of actively yawing, and belongs to the technical field of offshore wind power. The problem that the aerodynamic efficiency of an impeller is reduced due to the fact that a fan platform needs to bear multiple coupling effects of ocean currents and waves and the fan platform deviates from the best windward direction due to the hydrodynamic force coupling effect when an included angle is formed between the ocean current direction and the wind direction under the action of the complex ocean environment is solved. The system comprises a wind turbine generator, a mast type tower, a platform foundation, a single-point mooring device and a flow guide device, the edge of the platform foundation is connected with the single-point mooring device and can rotate by 360 degrees around the single-point mooring device. The flow guiding device is installed at the edge position of the platform foundation and arranged opposite to the single-point mooring device, the horizontal section of the flow guiding device is in a symmetrical streamline shape, and the flow guiding device is provided with a driving device which drives the flow guiding device to rotate in the horizontal direction and adjusts the acting force of ocean current on the fan platform. The power generation device is mainly used for improving the power generation efficiency of the mast type tower offshore wind turbine platform.

An axial fan assembly includes a first axial fan and a second axial fan arranged side by side. The second axial fan includes an impeller having a shaft, and a frame. The frame includes a surrounding wall and a lateral guiding structure. The surrounding wall forms an axial flow channel for accommodating the impeller, wherein the surrounding wall includes a first outer wall surface facing the first axial fan, and an airflow generated by the impeller flows out of the axial flow channel through an outlet end. The lateral guiding structure is protrudently disposed at the outlet end on an edge surface connected with the first outer wall surface, wherein the lateral guiding structure guides a partial airflow of the airflow at the first edge surface toward a first direction, and the first direction and a normal direction of the first outer wall surface include a first acute angle.

The invention relates to the field of the centrifugal fan industry, in particular to an impeller with multi-element coupling bionic blades and a centrifugal fan, the impeller comprises a front disc and a rear disc, an exhaust inlet is formed in the middle of the front disc, a plurality of blades are arranged on the rear disc in a surrounding array mode, and the blades comprise long blades and short blades which are evenly distributed at intervals; the long blades and the short blades are all metal plate type single-arc multi-element coupling bionic blades. According to the impeller with the multi-element coupling bionic blades and the centrifugal fan, according to the principle of a bionic flow control technology, the front edge of the long blade adopts a streamline structure characteristic of simulating the outer side edge of a shark tail fin, and the tail edge of the blade adopts a typical arc tooth structure characteristic of simulating the feather front edge of a tenon wing; the common problems of small flow, low pressure, low efficiency and large noise of a centrifugal fan in the prior art are solved.

The invention relates to a magnetic suspension air separation expansion machine system and an operation method thereof. The system comprises a base, a magnetic suspension bearing assembly, a rotor assembly and a control module. The magnetic suspension bearing assembly is arranged on the base, comprises an expansion end radial magnetic suspension bearing, a brake end radial magnetic suspension bearing and an axial thrust magnetic suspension bearing, and is used for supporting radial and axial forces of the rotor assembly; the rotor assembly is arranged in the machine body and connected with the machine body through the magnetic suspension bearing assembly, and non-contact suspension is achieved. The control module is electrically connected with the magnetic suspension bearing assembly and used for controlling the magnetic suspension bearing assembly to suspend the rotor. The operation method comprises the steps of self-checking before starting, electrifying to suspend the rotor, starting the air compressor to pressurize, adjusting flow to drive the expansion impeller, carrying out split-flow cooling on gas, and collecting data in real time to maintain stable suspension of the rotor. The device has the advantages of high efficiency, stability, energy conservation and the like and is suitable for the field of air separation.

The invention belongs to the field of aero-engines and turbines, and provides a quick prediction method, system and device for a two-dimensional viscous compressible flow field of a gas compressor and a medium, and the method comprises the steps: obtaining CFD simulation data of a two-dimensional blade profile of the gas compressor under multiple working conditions, and carrying out the preprocessing to obtain a standardized training data set; on the basis of the data set, constructing a hybrid neural network model which takes a blade profile geometric parameter and an operation condition parameter as input and takes a two-dimensional viscous compressible flow field as output; combining mean square error, gradient loss and physical consistency loss based on RANS equation residual error to construct a total loss function, and performing end-to-end training on the model; during reasoning, to-be-predicted parameters are input into the trained model according to the same preprocessing mode, and then a flow field prediction result can be rapidly output. According to the method, the problems of long consumed time, low precision and poor consistency of traditional CFD simulation can be solved, millisecond-level flow field prediction is achieved, high precision and high physical consistency are achieved, and the method is suitable for efficient optimization design of the blade profile of the gas compressor.

The invention provides a welding tool for an automobile rear auxiliary frame cross beam, and belongs to the technical field of automobile cross beam welding, the welding tool comprises a base, a rear auxiliary frame main body, an operation table and a welding robot, and the operation table and the welding robot are arranged on the base, and the welding tool further comprises a positioning splicing assembly and a flow guide destressing assembly; protective gas is integrated on the third clamping jaw, the third clamping jaw can effectively guide protective gas flow to a welding seam while fixing the side cross beam, and effective flow guide of the protective gas can be achieved in cooperation with arrangement of the movable spraying pipe; during welding, the impeller is static to block gas, the flow speed is reduced, welding fluid is prevented from splashing and losing due to overlarge airflow impact, and stable combustion of welding arcs is maintained; in the cooling stage after welding is completed, the inductor controls the electromagnetic base to be powered off, gas flow is increased, the cooling speed is increased, meanwhile, vibration is generated to be matched with cooling to eliminate welding residual stress, the stability and reliability of a weldment are improved, the production period can be shortened, and the production efficiency is improved.

The invention relates to a single-hook hoisting turnover device for mounting and dismounting a large megawatt wind power impeller, which comprises a main hoisting arm, a transverse swing arm, a driving structure, an impeller upper hoisting seat and an impeller side hoisting seat, a first hoisting point structure is arranged at one end of the transverse swing arm, and a second hoisting point structure is arranged at the other end of the transverse swing arm; a hinge point between the main lifting arm and the transverse swing arm is located between the first lifting point structure and the second lifting point structure, and a connecting point of the first lifting point structure and the impeller upper lifting base and a connecting point of the second lifting point structure and the impeller side lifting base are located on the two sides of an included angle area of the gravity center plumb line of the impeller in the horizontal placing posture and the gravity center plumb line of the impeller in the butt joint posture. Through cooperation of the structures, the purpose that the wind power impeller is hoisted and turned over through a single hook is achieved, compared with a mode of coordinated operation of two cranes, the operation cost and the operation difficulty are reduced, and meanwhile the risk that the cranes and the impeller overturn is also reduced.

The utility model discloses a turbine flow meter, which belongs to the technical field of turbine flow meters and comprises a flow meter body, a flange plate is mounted at the end of the flow meter body, a preamplifier is fixedly connected to the upper end of the flow meter body, a magnetoelectric converter is mounted in the preamplifier, and the magnetoelectric converter is fixedly connected with the flange plate. A front guide piece and a rear guide piece are fixedly connected to the interior of the flow meter body, an impeller is connected between the front guide piece and the rear guide piece through a bearing, a filtering disc is installed in the flow meter body, and the upper end and the lower end of the filtering disc are connected with the interior of the flow meter body through auxiliary springs; a center rod is installed in the middle of the filtering disc, and a positioning rod is inserted into the center rod. According to the turbine flowmeter, after the filter screen is blocked, automatic cleaning of the filter screen can be achieved through fluid thrust, and meanwhile when the turbine flowmeter is connected with an external pipeline, the stability of connection between the pipeline and the turbine flowmeter is effectively guaranteed.

The invention provides a fine grain flotation machine impeller of a three-layer structure, and relates to the technical field of ore dressing. The impeller comprises a framework disc, the outer end face of the framework disc is provided with a connecting flange used for being installed with a power component of the flotation machine in a matched mode, and the inner circumferential face of the framework disc is provided with a circle of outer-layer blades which are evenly arranged at intervals. A closed ring is arranged at the end, away from the connecting flange, of the framework disc, the bottom ends of the outer-layer blades are arranged on the inner side of the closed ring, and a circle of inner-layer blades are evenly arranged on the outer side of the center hole in the framework disc at intervals. A circle of middle blades which are evenly arranged at intervals and fixedly connected with the inner end face of the framework disc are arranged between the outer-layer blades and the inner-layer blades. The structure of the outer-layer blade, the framework disc and the closing plate forms a gradually-shrinking closed flow channel, so that the initial kinetic energy and local turbulent kinetic energy of mineral particles and bubbles are increased, the collision mineralization probability of the bubbles and the mineral particles is increased, the pressure at the outlet of a gradually-shrinking opening is released, nano-bubble precipitation is facilitated, and the recovery of micro-fine particle mineralization is improved.

The invention relates to the technical field of water pump structures, and discloses a self-cleaning anti-blocking water pump structure which comprises a pump body and a suction component. The suction component comprises a pump cover fixed to the pump body, a supporting cover and a filter screen, an impeller is installed in the pump cover, and the suction component further comprises a transmission component located in the supporting cover; the supporting ring layer is arranged on the supporting cover and connected with the transmission part; the extrusion type cleaning part and the pulse frame are mounted on the outer side of the supporting ring layer and are used for clamping the filter screen; and the extrusion type cleaning part rotates along with revolution of the supporting ring layer. Through rotation and revolution of the extrusion type cleaning part, blocking particles in holes of the filter screen are extruded outwards through matching points, preliminary cleaning is achieved, the deformation layer is attached to the filter screen to close the holes, water flow is prevented from passing through, and the possibility that the extruded particles block the holes again due to water flow guide is reduced; the deformation layer is in flexible contact with the filter screen when rotating, severe friction is reduced, and deformation or damage of the filter screen is avoided.

The invention relates to the technical field of turbomachinery monitoring, and discloses a cross-dimension turbomachinery dynamic risk prediction and visualization system. A dynamic data acquisition module of the system acquires multi-source heterogeneous sensing data such as a vibration spectrum sequence, an aerodynamic load distribution matrix, a rotor axial displacement time sequence and a surface temperature field thermodynamic diagram in real time; the service degradation evaluation module extracts a vibration characteristic spectrum based on a historical degradation mode library, calculates an instability risk level in combination with an aerodynamic load deviation value, and fuses a displacement sudden change gradient and a temperature difference abnormal area to generate a service degradation track matrix; the multi-dimensional risk prediction module inputs the degradation track matrix into a space-time coupling prediction network, and outputs a dynamic risk assessment vector including time-varying fault probability distribution, a residual life prediction value and a risk propagation path set; and the risk visualization engine module constructs a three-dimensional risk thermal field model and generates a dynamic thermal grid layer superposed on the digital twinborn body.