555 results about "Vertical axis wind turbine" patented technology

The invention provides a vertical axis wind turbine power prediction method based on multi-dimensional environment data, and relates to the technical field of vertical axis wind turbine power based on the multi-dimensional environment data. Multi-dimensional data are collected in real time based on a sensor network, and the multi-dimensional data comprise environment parameters such as wind speed, turbulence intensity and temperature and humidity, and operation states such as rotor rotating speed and pitch angle; secondly, performing empirical mode decomposition on a vibration acceleration signal, constructing a physical information neural network, taking environmental data and an aerodynamic load frequency domain energy spectrum as input, outputting a real-time wind energy utilization coefficient and an aerodynamic coefficient, and finally, determining the aerodynamic load based on an aerodynamic load time domain signal. A load cyclic spectrum is extracted by adopting online rain flow counting of dynamic window length, an accumulated damage value is calculated in combination with a fatigue damage model of humidity correction, and when the residual life is lower than a threshold value, load peak suppression and power generation efficiency balance are realized through cooperative control of magnetic resistance torque linear attenuation and flap fuzzy PID (Proportion Integration Differentiation).

The invention belongs to the field of wind power generation, and particularly relates to a wind driven generator with a differential device. A vertical axis wind turbine with a differential device is characterized in that a rotating shaft is arranged on a fixed shaft, an upper fixed gear and a lower fixed gear are fixedly arranged on the upper portion and the lower portion of the rotating shaft respectively, a positioning bearing is further arranged in the middle of the rotating shaft, and an upper reset spring is arranged between the positioning bearing and the upper fixed gear; and a lower reset spring is arranged between the positioning bearing and the lower fixed gear. An upper sliding rail and a lower sliding rail are arranged at the upper end and the lower end of the inner wall of the resistance type blade respectively, an upper sliding gear and a lower sliding gear are connected into the upper sliding rail and the lower sliding rail respectively, the upper sliding gear is meshed with the upper fixed gear, the lower sliding gear is meshed with the lower fixed gear, and the upper sliding gear and the lower sliding gear slide in the upper sliding rail and the lower sliding rail. The wind driven generator can combine the advantages of a lift type fan and a resistance type fan, is easy to start at a low speed and can speed up at a high speed, so that the power of the fan is improved.

An intelligent efficient vertical axis wind turbine with variable flaps and propeller pitches comprises blades, blade sliding rings, a main body sliding ring, a motor, a connecting rod, a connecting disc, an intermediate shaft, a motor connecting shaft and a rolling bearing. The blade comprises a flap, a flap connecting rod, a connecting rod, a rudder arm, a steering engine, a blade shaft and a blade front part, wherein the flap, the flap connecting rod, the connecting rod, the rudder arm and the rudder mechanism form a parallelogram-shaped connecting rod mechanism; the steering engine is a driving rocker, rotates by a certain angle under the driving of electric power, and can drive a driven rocker composed of a flap and a flap connecting rod to rotate by a certain angle. The invention further provides a method for controlling the variable flaps of the vertical axis wind turbine through the deep reinforcement learning algorithm. According to the invention, the pitching moment generated after the flap is driven by the steering engine to deflect is indirectly regulated and controlled. Under driving of methods such as deep reinforcement learning, the flap angle can be intelligently adjusted in a closed-loop mode along with the rotor phase and the incoming flow direction, and real-time optimization of the lift resistance and the direction of the blade is achieved.

The invention relates to the technical field of wind driven generators, and discloses a vertical axis wind driven generator with energy-saving and efficiency-increasing functions, which comprises a base, a support rod arranged on the base and a generator arranged on the support rod, a rotating table is fixed on a main shaft of the generator, and a plurality of groups of support frames are connected on the rotating table in an equal-angle annular array manner; a group of vertical blades are fixed on each group of support frames; a power-assisted starting mechanism is arranged on the rotating table, a rotating rod is rotationally connected to the power-assisted starting mechanism, a circular truncated cone is arranged at the end of the rotating rod, multiple sets of supporting plates are arranged at the two ends of the circular truncated cone, and spiral blades are arranged between the supporting plates in each set. According to the vertical-axis wind driven generator with the energy-saving and efficiency-increasing functions, when the wind speed is low, due to the fact that the spiral blades are small in mass and have better wind resistance and rotate before the vertical blades, the starting mechanism transmits rotating force of the spiral blades to the generator main shaft, and the wind speed threshold value of the vertical blades driving the generator main shaft to rotate is reduced; the power generation efficiency is improved.

The invention provides a reverse lift-drag combined vertical axis wind turbine based on differential transmission and a control method, the vertical axis wind turbine comprises a rotor system, a blade system, a supporting system, a transmission system and a control system, the rotor system comprises a composite rotor shaft, and the composite rotor shaft comprises an inner rotor shaft and an outer rotor shaft; the inner rotor shaft and the outer rotor shaft coaxially rotate around the same rotating shaft in different directions; the transmission system comprises a transverse driving gear, a longitudinal driven double-tooth gear and a transverse driven gear. Differential speed and reverse rotation between the inner rotor shaft and the outer rotor shaft are achieved through linkage of the gears. The blade system comprises lift-type blades and resistance-type blades, the control system can adjust the angles of the lift-type blades and the resistance-type blades according to the wind speed and the wind direction, under the extreme working condition, the angles are adjusted to enable the blade system and the supporting system to be tangent to form a closed structure, and the safety of the overall structure of the wind turbine is protected.

The invention discloses an operation control method and device for a vertical axis wind turbine generator, and belongs to the technical field of wind power generation. The method comprises the steps that a pitch angle of a lower blade is driven to be gradually increased to a preset angle at a preset angular speed through a variable pitch controller; when the rotating speed of the wind wheel reaches the cut-in rotating speed, the optimal tip speed ratio is tracked until the rotating speed of the wind wheel rises to the rated rotating speed; when the rotating speed of the wind wheel reaches the rated rotating speed, the rotating speed of the wind wheel is stabilized at the rated rotating speed; when the driving torque under the action of the aerodynamic load continuously exceeds the rated torque of the generator and the rotating speed of the generator reaches an early-warning rotating speed threshold value, a shutdown control strategy is triggered; and under the shutdown control strategy, the connection between the generator and the power grid is cut off, and mechanical braking is applied, so that the wind wheel stops rotating. According to the technical scheme, smooth starting of the wind wheel, stable operation at the rated rotating speed and safe shutdown in the fault state are achieved, the starting and stopping capacity and power stability of the unit are effectively improved, the wind speed application range is expanded, and it is guaranteed that the whole-process operation of the unit is safe and reliable.

The utility model discloses a double-layer wing type vertical axis wind turbine, which relates to the technical field of wind power generation and comprises a wind turbine body and at least two wing type blade groups, each airfoil blade group comprises a main airfoil blade, an auxiliary airfoil blade and a plate sheet; the auxiliary wing-shaped blades are arranged on the sides, close to the rotating center line of the wind turbine body, of the main wing-shaped blades, and first wind passing channels are formed between the auxiliary wing-shaped blades and the main wing-shaped blades. The plate sheets are arranged on the sides, close to the rotating center line of the wind turbine body, of the main wing-shaped blades, and second wind passing channels communicated with the first wind passing channels are formed between the plate sheets and the main wing-shaped blades. And a clearance space is formed between one side edge of the plate sheet and the tail edge of the auxiliary airfoil blade. The pressure difference between the upper surface and the lower surface of the main wing-shaped blade can be increased through the design of the plate sheets, the blade tip vortex generated on the lower surface of the main wing-shaped blade can be weakened, then the lift force borne by the main wing-shaped blade is increased, and the purpose of further improving the self-starting performance and the power generation efficiency of the wind turbine is achieved.

The invention discloses a novel offshore wind-light-wave energy comprehensive complementary power generation structure system which comprises a vertical axis wind power generation module, a solar photovoltaic power generation module, a point absorption type wave energy power generation module, a floating platform and a mooring system. A point absorption type wave energy power generation device is arranged in the middle of the floating platform, and the mooring system is connected with the floating platform so as to keep the floating platform at the sea position. According to the novel offshore wind-light-wave energy comprehensive complementary power generation structure system, wind energy, solar energy and wave energy can be fully utilized, the cost per kilowatt-hour is effectively reduced, pollution and consumption are avoided, and application and popularization are suggested.

The invention discloses a high-altitude suspension type wind-solar combined power generation device and a working method thereof, the device comprises a high-altitude floating assembly, the high-altitude floating assembly comprises a floating air bag, the floating air bag is provided with an air inlet and an air outlet, and the floating air bag is communicated with a flexible helium pipe; the vertical axis wind turbine assembly comprises a vertical axis wind turbine, and the vertical axis wind turbine is fixed between the two floating air bags; the solar tracking photovoltaic assembly comprises a photovoltaic panel, and the photovoltaic panel is installed on the floating air bag. The fixed cable assembly comprises a twisted rope, one end of the twisted rope is connected with the floating air bag, and the other end is connected with the ground. According to the invention, abundant high-altitude solar energy and wind energy which are neglected for a long time are efficiently utilized, new energy power generation land and original unsuitable complex landforms can be fully utilized, and reference for a high-altitude new energy power generation device form is provided.

The invention relates to the technical field of wind driven generator control, aims to solve the problems that in the prior art, blades of a vertical-axis wind driven generator are fixed, the wind sweeping area is difficult to adjust, and the power generation efficiency is limited, and provides a control strategy of a vertical-axis wind driven generator. Establishing a control relation model of rated wind speed, current wind speed, fan rated rotating speed, first generator rotating speed, positive and negative motor rotating speed and rotating direction. The current wind speed and the rotating speed of the generator are acquired by the sensor, and the controller compares the current, rated and maximum power wind speed according to a model, controls the positive and negative motor to drive the lifting mechanism and adjusts the blade length and the wind sweeping area. The wind wheel has the beneficial effects that the wind sweeping area of the wind wheel can be changed by controlling the lengths of the blades at different wind speeds, continuous and stable power generation is achieved, and the power generation efficiency can be effectively improved.

The invention relates to the field of wind driven generators, and particularly discloses a floating type vertical axis wind turbine multi-partition variable pitch control strategy which comprises the steps that S1, basic parameters and operating condition parameters of a unit are obtained; s2, establishing an aerodynamic model based on a double-disk multi-flow management theory and a superposition wind speed method; s3, measuring parameters through a sensor, and calculating a theoretical attack angle of the blade; s4, establishing a multi-partition pitch angle change function based on the theoretical attack angle; s5, constructing an NSGA-II multi-target optimization model, and taking maximization of an average power coefficient and minimization of a blade thrust standard deviation as targets; s6, substituting a function to obtain an optimal variable pitch control factor and an optimal pitch angle; and S7, the optimal pitch angle is converted into a variable pitch actuator instruction. The problems that an existing strategy is limited in partition, the wind direction influence is ignored, and optimal parameters for working condition adaptation are lacked are solved, the wind energy capture efficiency is improved, the load fluctuation is reduced, and the variable pitch control accuracy is improved.

The invention discloses a method for calculating aerodynamic characteristics of a vertical axis wind turbine. The method comprises the following steps: establishing a computational fluid mechanics model and a free vortex wake model and forming interaction, segmenting a blade and establishing a two-dimensional local area, and initializing flow field and vortex wake parameters; calculating an induced flow velocity sum of each vortex element in the center of a local area, and loading the induced flow velocity sum and a far-field incoming flow velocity to a boundary node; the airfoil action is equivalent to point vortex and dipole flow at the circle center, and induced velocities of the point vortex and the dipole flow at boundary nodes are loaded; carrying out fluid mechanics parameter calculation on the flow in each two-dimensional local area; integrating the airfoil surface pressure to obtain a lift force, and calculating a circular rector to update the point vortex intensity; the dipole flow intensity is calculated and updated through the flow velocities of the three specific observation points. The method for calculating the aerodynamic characteristics of the vertical axis wind turbine is high in calculation efficiency and reliable in precision, the aerodynamic characteristics of the vertical axis wind turbine are accurately obtained with small calculation amount, and powerful support is provided for structural design and optimization of the vertical axis wind turbine.

The invention relates to the technical field of vertical axis wind driven generators, and discloses a control method, device and equipment of a vertical axis wind driven generator, a medium and a product. The control method of the vertical axis wind driven generator comprises the steps that according to historical environment data around a target vertical axis wind driven generator and historical operation data of the target vertical axis wind driven generator, the target vertical axis wind driven generator is controlled; determining a target relationship between the environmental condition and the optimal operation parameter combination; according to the current environment data around the target vertical axis wind turbine, predicting the environment trend in the preset time period to obtain environment prediction data; determining a target operation parameter combination according to the environment prediction data and a target relationship between the environment condition and the optimal operation parameter combination; the target vertical axis wind turbine is controlled according to the target operation parameter combination in the preset time period, the target vertical axis wind turbine is controlled according to the dynamic environment change, and the power generation efficiency is improved.

The invention discloses an adjustable vertical-axis wind turbine, and relates to the technical field of wind power generation. The device comprises a supporting column, a mounting cylinder is fixedly mounted at the top end of the supporting column, the mounting cylinder and the supporting column are fixedly mounted through a flange, a rotating column is rotatably connected to the top of the mounting cylinder in a limiting mode, and connecting plates are rotatably connected to the periphery of the rotating column in a uniform limiting mode; a mounting shaft is hinged to the side, away from the rotating column, of the connecting plate in a limiting mode, and main blades are rotationally connected to the outer side of the mounting shaft in a limiting mode. The positions and the gravity centers of the blades are adjusted at the starting stage of driving rotation and under the condition of different rotating speeds, rotation can be started more easily in the static state, continuous rotation can be better facilitated after rotation, effective utilization of wind energy is improved, generated electric quantity is increased, and the wind power generation efficiency is improved. The attack angle of the blade is adjusted according to the wind speed, so that the blade is always located at the optimal wind receiving angle, and the utilization rate of wind energy is increased.

The invention relates to the technical field of power equipment, in particular to an adjustable blade supporting frame of a vertical axis wind turbine, which comprises a base, a central shaft is rotatably connected to the base through a rotating seat, two groups of fixed discs are fixedly arranged on the outer wall of the central shaft, and a plurality of brackets are mounted on the fixed discs; one end of the support is movably connected with the inner end face of the outer blade through a first hinge block, a centrifugal driving mechanism is fixedly arranged on the outer wall of the center shaft, and a plurality of angle adjusting mechanisms are in transmission engagement with the outer side of the centrifugal driving mechanism. According to the adjustable blade supporting frame of the vertical-axis wind turbine, the problem that a traditional fixed blade is difficult to adapt to variable wind conditions is effectively solved, active speed limiting can be achieved when the rotating speed is too high, damage to equipment caused by power overload can be avoided, it can be guaranteed that an outer blade always operates in a high-efficiency interval, and the service life of the equipment is prolonged. And it can be ensured that the draught fan can continuously and stably operate when the wind speed is low, the applicable wind speed range of equipment is widened, and the utilization rate of wind energy resources is increased.

The utility model discloses a water environment safety monitoring buoy, which relates to the technical field of water floating equipment and comprises a buoy box, a storage battery is fixedly mounted in the buoy box, a battery sensor is fixedly mounted on one side of the storage battery, and a solar panel is fixedly mounted in the buoy box. The buoy box is connected with a micro vertical axis wind driven generator through a clamping mechanism; the outer side of the buoy box is connected with a protection plate through a buffer assembly, the buoy box is provided with a dissolved oxygen sensor, a pH value sensor, a turbidity sensor, a conductivity sensor and a water temperature sensor, and the lower end of the buoy box is connected with a sinking anchor through a winding mechanism; the miniature vertical-axis wind driven generator can stably convert wind energy into electric energy, the electric energy and the solar panel are coordinated and complemented to continuously store power for the energy storage device, and a hybrid power supply system formed by the miniature vertical-axis wind driven generator and the solar panel can stably and efficiently provide reliable power support for the water environment safety monitoring buoy.

The invention discloses a vertical axis wind turbine driving device with a wind deflector, and relates to the field of mechanical engineering, the driving device comprises a long shaft, a plurality of blades and a bearing assembly; the long shaft and all the blades form a wind wheel for driving the generator set to generate electricity; the wind deflector assembly is arranged on one side of the wind wheel; when the wind wheel rotates under wind power, the wind deflector assembly guides wind below the wind wheel to the upper portion of the wind wheel to form resultant force with wind acting on the upper portion of the wind wheel, driving torque generated by the wind wheel is enhanced, and the generator set is driven to generate power. The vertical-axis wind driven generator is very convenient to install and transport, the power generation efficiency of the vertical-axis wind driven generator is effectively improved, the blades are not prone to breakage and deformation, and meanwhile noise during working is effectively reduced. Therefore, compared with a traditional vertical axis wind driven generator driving device, the vertical axis wind driven generator driving device is more suitable for being popularized and applied in cities or areas with limited space, especially areas with rich wind energy.

The invention relates to the technical field of wind power generation equipment, and discloses a vertical axis wind turbine steering structure which comprises a motor fixedly installed in a control cabinet, the output end of the motor is fixedly connected with a driving gear, the outer side of the driving gear is in meshed connection with a driven gear, and the rear end of the driven gear is fixedly connected with a worm. The worm is rotationally installed in the control cabinet, the outer side of the worm is connected with a worm gear in a meshed mode, a bearing seat internally provided with a bearing is installed at the lower end of the connecting shaft, and a generator is fixedly installed at the upper end of the connecting shaft. According to the vertical-axis wind turbine, the fan blades are arranged in the wind barrel, and the whole vertical-axis wind turbine is kept balanced through the empennage on the outer side of the wind barrel; and the direction of the windward plate is adjusted in real time according to the wind direction, so that the air inlet of the wind cylinder faces the windward direction, the wind resistance is better reduced, the rotating speed of the fan blades is increased, wind energy is further utilized to generate power to the maximum extent, and the power generation efficiency is high.

A vertical axis wind turbine with variable thickness blade is disclosed. The wind turbine may include a blade including a skin having a first skin section and a second skin section. A first skin section thickness may be greater than a second skin section thickness. The blade may further include a bracketed structural member disposed on the first skin section. The bracketed structural member may include one or more L-shaped brackets. The wind turbine may further include a nut bar, which may be a flat nut bar. The bracketed structural member may be configured to hold the nut bar between the L-shaped brackets. The wind turbine may further include an arm connecting bracket that may be configured to attach the arm to the blade via the nut bar. The wind turbine may further include a transition fairing that may attach to the blade via the nut bar.

The utility model discloses a solar energy and wind energy power supply device which comprises a supporting cylinder, the inner ring of the supporting cylinder is connected with a sliding cylinder in a sliding mode, the inner ring of the sliding cylinder is fixedly connected with a connecting plate, an electric cylinder is fixedly installed on the inner bottom wall of the supporting cylinder, and the telescopic end of the electric cylinder is fixedly connected with the bottom face of the connecting plate. A top plate is fixedly connected to the top end of the sliding cylinder, and an illuminating lamp panel is fixedly installed on the bottom face of the top plate. According to the device, the supporting cylinder and the sliding cylinder are arranged and are matched with the electric cylinder, the connecting plate and the top plate, so that the vertical-axis wind power generator and the photovoltaic panel can be driven to flexibly move up and down, and the power generation height of the device can be conveniently adjusted; solar energy and wind energy can be used for dual power generation work, the power supply box is arranged, then the wind energy and the solar energy can be efficiently utilized, the power generation efficiency of the solar energy and the wind energy is improved, and the subsequent power supply effect is guaranteed.

The invention relates to the technical field of state monitoring and fault diagnosis of wind power generation equipment, and discloses a fault diagnosis system and method for a vertical axis wind power generator based on digital twinning, and the system comprises a physical sensing unit, a digital twinning body, an intelligent diagnosis engine, and a predictive maintenance platform. The physical sensing unit deploys a multi-source sensor to collect real-time data; the digital twin body is a high-fidelity virtual model fusing high-precision geometry, multi-physics field simulation and a data-driven degradation model; and the intelligent diagnosis engine realizes fault identification, positioning and mechanism traceability by comparing measured data with simulation data and combining fault mode library matching and virtual fault injection simulation. According to the method, the digital twin which dynamically interacts with the physical entity in real time and is continuously evolved and updated is constructed, the conversion from threshold alarm to mechanism simulation prediction is realized, and the technical problems that in the prior art, multi-source data is isolated, a diagnosis model lacks physical mechanism support, and dynamic simulation and predictive maintenance cannot be carried out are solved.

The invention relates to the technical field of wind power generation, in particular to a vertical axis wind turbine with blades rotating in a self-adaptive mode along with wind speed changes. The two vertical main shafts are arranged at the upper end and the lower end of the supporting cylinder; the base is arranged at the bottom end of the vertical main shaft located at the bottom; the turning system is arranged in an inner cavity of the supporting cylinder; one ends of the two sets of supporting shafts are connected with the two sides of the turning system correspondingly, and the other ends of the supporting shafts extend out of the supporting cylinders; the blade is arranged at the other end of the supporting shaft; when the turning system is started, the supporting shafts on the two sides can be driven to drive the blades to rotate and adjust in the same direction at 0-90 degrees. By means of the direction changing system, the blades can automatically adjust the rotation angle and change the blade load according to the wind speed change, safe shutdown of the wind turbine is ensured, the risk that the supporting arms deform or are damaged due to overload is reduced, the overall structural safety is improved, and the service life is prolonged.

The invention discloses a load control and shutdown protection structure of a large vertical axis wind generating set, and relates to the technical field of wind power generation equipment. The blades are connected with the rotating shaft through connecting rods; and the adjusting mechanism is used for adjusting the blade attack angle. In the operation process of the wind turbine, the driving assembly, the connecting rod and the straight bevel gears can drive the blades and the connecting rod to rotate so as to adjust the attack angle of the blades. When the wind turbine is started, the wind wheel starting torque can be improved by changing the attack angle of the blades, extra power needed by starting is reduced, and then the power generation cost is reduced. When the wind speed is higher than the cut-out wind speed, the load acting on the blade exceeds the bearing limit of the generator, the pitch angle of the blade can be changed in a linkage mode by changing the attack angle of the blade, the blade generates large resistance, the rotating speed of the rotating shaft is reduced, and the wind turbine can work under the working condition of higher wind speed. And the working range and application region of the unit are expanded.

The invention relates to the technical field of vertical axis wind turbines, in particular to a vertical axis wind turbine based on the Magnus effect, and aims to solve the technical problem that an existing lift force type vertical axis wind turbine is difficult to start in a breeze environment. To this end, the Magnus effect-based vertical axis wind turbine of the present application comprises: a vertical axis; the at least three lifting force blades and the at least three Magnus rotors are connected to the vertical shaft; the driving assembly is used for driving the Magnus rotor; and the control module is electrically connected with the driving assembly and used for controlling starting and stopping of the driving assembly according to the actual wind condition so as to drive the Magnus rotor to rotate, and after the Magnus rotor rotates, the lifting force blades continuously capture wind energy to maintain operation of the vertical axis wind turbine. In this way, the defects that a lift type vertical axis fan is small in starting torque and difficult to start are overcome, and normal starting of the lift type vertical axis fan under the breeze condition is achieved.

The utility model provides a layout structure for improving wind energy utilization rate by wake flow control of a wind power plant, which comprises an upstream horizontal-axis wind turbine, a vertical-axis wind turbine and a downstream horizontal-axis wind turbine, and the vertical-axis wind turbine is mounted at the front 6D position of the downstream horizontal-axis wind turbine; and the transverse distance between the two vertical axis wind turbines in the wind field is 1.6 D. And the two vertical axis wind turbines rotate in opposite directions. And the H-shaped three-blade vertical axis wind turbine is arranged at a position 6D away from the center of the impeller. A vertical axis wind turbine and a horizontal axis wind turbine are arranged on the wind power plant terrain. And the distance between the vertical axis wind turbines is 1.6 D. The wind direction of the two vertical axis fans blows from the front to the back of the fans. And the diameter of the vertical axis wind turbine is D. The vertical-axis wind driven generators are additionally arranged between the horizontal-axis wind driven generators, wind speed distribution of the boundary layer of the wind power plant is changed, and then the wind energy utilization rate of the wind power plant and the overall power generation capacity of the power plant are improved.

A large-scale, modular, wind power generating structure and system involving a toroidal or ovoidal shaped wind amplification structure / module that can be stacked vertically to form a tower that passively accelerates a wind flow that moves around each of the modules due to the Bernoulli Principle. Each amplification level includes a plurality of vertical axis wind turbine and generator assemblies, fairings, and vanes that form a synergistic system wherein the efficiency of the vertical axis turbine and generator assemblies and the amount of energy that can be produced per module are substantially improved compared to the turbine assemblies operating outside the integrated and amplified wind system.

The invention belongs to the technical field of generators, and particularly relates to a vertical axis wind turbine assembly structure which comprises a generator rotor shaft, a flange plate fixedly sleeves the outer side of one end of the generator rotor shaft, a generator upper cover is arranged below the flange plate, and the generator upper cover sleeves the outer side of the generator rotor shaft. The generator lower cover is placed below the generator upper cover, through the bearing assembly, the stator core is prevented from shaking in the left-right direction, the stability of the stator core in the whole generator assembly structure is guaranteed, the stator core is supported in the vertical direction, and the stator core is prevented from shaking in the left-right direction. In addition, the moving space of the stator iron core is further restrained in the horizontal direction, the rubber base pad can cooperate with the relaxation clamping plate and other parts in the starting, stopping or continuous operation process of the generator at different wind speeds, the stability of the stator iron core is guaranteed in an all-around mode, and it is guaranteed that the generator is in an efficient and stable operation state all the time.

The present invention provides a shroud for a vertical axis wind turbine. The shroud is configured in use to externally surround a rotor of a vertical axis wind turbine. The shroud comprises: upper and lower axially spaced apart supports, configured in use to be respectively positioned above and below the rotor, and each support has a radially outer periphery defining a polygonal shape with a plurality of circumferentially distributed corners. The shroud comprises a plurality of circumferentially distributed stators each extend longitudinal between a corner of the upper support and a corner of the lower support such that adjacent pairs of stators and the interposed sections of the outer periphery of the upper and lower support define a plurality of quadrilateral frames configured in use to circumferentially surround the rotor.

This invention discloses an aerodynamic test bench adapted to horizontal / vertical axis wind turbines, including a base and a connecting column. The connecting column is located on top of the base, and a test platform is provided above the connecting column. The test platform includes a horizontal bar, and one end of the horizontal bar is provided with... T The horizontal bar has a vertical bar at the other end. T A square platform is mounted on top of the support frame; a dynamic torque sensor is mounted on the square platform, with one end connected to a magnetic powder brake and the other end connected to a wind turbine fixing rod. This invention also discloses an aerodynamic testing method adapted to horizontal / vertical axis wind turbines, including: wind turbine type adaptation installation, basic aerodynamic performance testing (no yaw), yaw condition aerodynamic performance testing, and variable load condition aerodynamic performance testing. T The bracket enables rapid switching between horizontal and vertical axis wind turbines. The combination of a precise yaw system and stepless load adjustment can simulate various complex working conditions such as constant wind speed with varying load and constant load with varying yaw angle.

The invention provides a two-dimensional flow field calculation method and system for a vertical axis wind turbine, and relates to the technical field of computational fluid mechanics, and the method comprises the steps: building a two-dimensional numerical model for a middle plane of the vertical axis wind turbine; based on the two-dimensional numerical model, determining a two-dimensional flow field of the vertical axis wind turbine at the current moment; according to the two-dimensional flow field, blade lift force is determined; generating a target blade tip vortex element, and calculating the strength of the target blade tip vortex element through the Rogowski lift theorem; updating the position and strength of the vortex element of the blade tip vortex; traversing all grids in the two-dimensional flow field drainage basin based on the updated blade tip vortex elements, and for each grid, calculating the blade tip vortex induced velocity of the position where the grid is located; calculating and applying a required mass source item and a required momentum source item according to the induced velocity; and after the preset updating frequency is reached, outputting a calculation result. The calculation amount is reduced, and the calculation efficiency and accuracy are improved.