7663 results about "Impeller" patented technology

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 an intelligent diagnosis system and method for a wind turbine impeller-gearbox composite fault, and relates to the technical field of fault diagnosis, and the system comprises a multi-modal data collection module which is used for carrying out the deployment of a multi-source sensor based on coupling path analysis, and collecting the multi-modal data of the multi-source sensor; the tensor matrix construction module is used for constructing a tensor matrix according to the multi-modal data; the fault analysis module is used for constructing a feature-damage mapping model to perform fault analysis on the tensor matrix to obtain a fault diagnosis result; and the fault maintenance module is used for pushing the fault diagnosis result and carrying out fault maintenance according to the fault diagnosis result. According to the invention, the technical problem that the fault diagnosis accuracy and the operation safety and stability of the wind power equipment are affected due to the fact that tiny early faults of key parts of the wind turbine cannot be effectively identified in the prior art can be solved, and the fault diagnosis accuracy and the system response efficiency are improved; the service life of equipment is prolonged; and the maintenance cost is reduced.

An apparatus for an aircraft powerplant includes an impeller rotor and a seal runner. The impeller rotor includes a plurality of fluid circuits. Each of the fluid circuits includes a first outlet passage, a second outlet passage and an inlet passage fluidly coupled to the first outlet passage and the second outlet passage in parallel. The seal runner includes a bore, an inner guide surface and an outer land surface. The seal runner extends circumferentially about the axis and radially between the inner guide surface and the outer land surface. The bore is fluidly coupled to the first outlet passage of each fluid circuit. The inner guide surface forms a radial outer peripheral boundary of the bore. The inner guide surface radially diverges away from the axis as the inner guide surface extends axially away from the impeller rotor and to a distal end of the seal runner.

A flow sensor for sensing fluid flow. The flow sensor includes an exterior, interior, a circuit board, and first and second ports. The first and second ports permit fluid to flow into and out of the interior. A Hall Effect Sensor in the interior detects the number of revolutions of an impeller. An electric coupler interfaces with the flow sensor and a transmitter for communication of the revolutions of the impeller to a controller. The controller determines the rate of fluid flow in a conduit. The controller issues a command signal to a component of a hydraulic system to alter the rate of fluid flow in the conduit.

The invention relates to the technical field of feed processing equipment, and discloses an efficient feed mixing stirrer which comprises a machine body, a main stirring assembly, an auxiliary stirring assembly, a driving mechanism, a feeding mechanism, a discharging mechanism and a control system.The machine body is of a horizontal cylindrical structure, and the main stirring assembly is arranged in the center of the interior of the machine body in the axial direction of the machine body; the auxiliary stirring assembly comprises a side wall auxiliary assembly and a bottom auxiliary assembly, and the driving mechanism is in power connection with the main stirring shaft, the side wall auxiliary assembly and the bottom auxiliary assembly through the transmission assembly and provides power for all the assemblies. Through a synergistic stirring structure of the main stirring assembly, the side wall and the bottom auxiliary assembly, a paddle and spiral composite structure of the main stirring assembly pushes materials to realize composite motion in the axial direction and the circumferential direction, stirring teeth of the side wall auxiliary assembly break a material circulation layer, and a scraping plate of the bottom auxiliary assembly prevents deposition of the materials with high density; the three synergistically enable the feed to be uniformly mixed.

The invention relates to an array type underwater propeller with high maneuverability and low energy consumption, a pump jet generating device and a flow divider jointly form a propeller front end, an intelligent fluid director forms a propeller rear end, and the pump jet generating device drives an impeller through a rotating motor to drive surrounding water flow to rotate to generate a main jet flow; an isolation structure is arranged in the flow divider and used for evenly dividing the main jet flow into multiple strands of independent sub jet flows, and all the sub jet flows form propelling power after entering the intelligent flow guider to be guided. The intelligent fluid directors are connected with the flow channels of the flow divider in a one-to-one correspondence mode and used for converting fluid flowing out of the flow divider and out of the jet flow face into effective action jet flow with the adjustable flow speed. The intelligent fluid director comprises a jet flow end regulation and control mechanism and a pressure relief end regulation and control mechanism, and the jet flow end regulation and control mechanism is used for independently regulating the flow speed of effective jet flow ejected from the fluid director; and the pressure relief end regulation and control mechanism is used for maintaining the constant flow velocity at the inlet of the fluid director by releasing part of water flow when the effective jet flow velocity is regulated.

An exhaust turbocharger has a housing, in which a shaft is mounted by bearings, which carries a turbine wheel, on the one hand, and a compressor wheel, on the other hand. An electric machine has a rotor and a stator. The rotor is secured on the shaft for conjoint rotation therewith and the stator surrounds the rotor radially on the outside. A sleeve, which supports the rotor radially and axially, is arranged between the stator and the rotor. The sleeve has at least one fluid duct, by way of which a cooling fluid can be guided toward the bearings of the shaft.

A catheter pump assembly is provided that includes an elongate body, an elongate flexible shaft disposed in the elongate body, and an impeller coupled with the distal end of the elongate flexible shaft. The drive system includes a drive component, a motor and a tension member. The tension member is coupled with the motor and the drive component and to cause the drive component to rotate, and thereby to cause the impeller to rotate.

The invention discloses an energy-saving and efficiency-improving submersible pump for an integrated pump gate. The energy-saving and efficiency-improving submersible pump comprises a gate body and a submersible pump body, the pump body part comprises an impeller, a rotating shaft and a pump shell, the inducer is arranged at the upstream end of the impeller, and the impeller comprises impeller blades and a hub; the device is characterized in that a step part is arranged on the peripheral surface of the lower end part of the hub, the inducer comprises inducing blades and an adjusting cylinder, the upper end of the adjusting cylinder is connected with the step part, the lower end of the adjusting cylinder is connected with an adjusting cap, a drainage cavity is formed among the adjusting cap, the adjusting cylinder and the lower end part of the hub, a first through hole is formed in the adjusting cap, and a second through hole is formed in the adjusting cylinder; third through holes are formed in the induction blades, and the third through holes penetrate to the blade tops of the induction blades. The suction performance of the submersible pump can be improved, the influence of boundary layers between the induction blades and impeller blades and secondary flow on liquid flowing is reduced, and therefore the hydraulic performance and efficiency of the submersible pump can be improved, and the good effects of energy saving and efficiency improving are achieved.

The invention discloses a wind turbine generator impeller anomaly detection method and system based on sound vibration signal identification. According to the method, firstly, impeller response is collected through a microphone / vibration sensor, and a Mel spectrogram is generated; then, a Teager-Kaiser energy operator and self-correlation analysis are utilized, and under the condition of not depending on a rotating speed signal, the rotating period of the impeller is recognized, and frequency spectrum segmentation is carried out; calculating a cross-period Mel frequency spectrum dynamic deviation, and normalizing the cross-period Mel frequency spectrum dynamic deviation through an amplitude correction coefficient related to the rotating speed; generating a periodic coherent energy diagram by adopting an improved structural similarity algorithm; performing filtering enhancement by using a harmonic resonance template, performing morphological deconstruction and parameterization on an abnormal region in the graph, and extracting geometric features; and finally, calculating a comprehensive abnormal score based on the multi-dimensional features and realizing automatic early warning. According to the method, the problems of variable working condition interference and rotating speed dependence are effectively solved, and accurate and stable detection of early abnormality of the impeller can be realized.

The invention discloses a fusion reactor gas injection device and method, and relates to the technical field of fusion engineering. The device comprises a driving air source supply unit used for providing high-speed airflow; the turbocharging unit comprises a turbine and an air compression impeller which are coaxially connected, an inlet of the turbine communicates with the driving air source supply unit, an inlet of the air compression impeller is used for guiding in working air, and the turbine is driven by high-speed airflow to rotate and drives the air compression impeller to rotate so as to compress the working air; an inlet of the high-pressure cavity is communicated with an outlet of the compressor impeller, and the high-pressure cavity is used for storing the compressed working gas to form a high-pressure gas source; the quick valve is arranged on an outlet pipeline of the high-pressure cavity and is used for performing pulse type release on the high-pressure air source; and the directional nozzle is connected to the downstream of the quick valve and is used for injecting the released working gas into the plasma boundary area of the fusion reactor. Therefore, when the fusion reactor gas is injected, the injection pressure can be increased, the response time can be shortened, and accurate regulation and control can be realized.

The invention relates to the technical field of axial flow fans, in particular to an impeller with S-shaped blades and an axial flow fan applying the impeller. On the axial projection of the impeller, the peripheral contour of each blade is defined by a blade root edge, a blade front edge, a blade outer edge and a blade rear edge, and the blade root edge is connected with the hub; the blade front edge and the blade rear edge are both wavy curves, and the blade root edge and the blade outer edge are both arc-shaped lines with the axis O of the hub as the circle center. Each blade is provided with a pressure face and a suction face, the pressure faces and the suction faces are oppositely arranged, and on the radial projection of the impeller, the pressure faces are arranged in a wave shape in a protruding mode from one end of the blade root edge to one end of the blade rear edge towards the suction faces and then concavely arranged, so that the blades are of an S-shaped structure. The problem that a traditional blade structure cannot meet the use requirements of high efficiency and low noise can be solved.

The invention relates to the technical field of fan machining, in particular to a grabbing retaining device based on air blower impeller assembly, which comprises a two-axis linear module, a mounting frame is fixedly connected to the side surface of a sliding table of the two-axis linear module, a bearing seat is fixedly mounted at the lower end of the mounting frame, and a rotary adjusting mechanism is mounted on the bearing seat. An annular upper cover is fixedly mounted at the lower end of the rotary adjusting mechanism, an annular base is fixedly mounted at the lower end of the annular upper cover, and clamping mechanisms for grabbing the impeller are mounted in the annular upper cover and the annular base; the impeller grabbing device has the beneficial effects that when an impeller needs to be grabbed, the two-axis linear module drives the mounting frame to move so as to adjust the position of the grabbing device, the clamping mechanism moves to the inner side of an impeller cover at the upper end of the impeller, at the moment, the clamping mechanism is driven to rotate through the rotary adjusting mechanism, and clamping claws are located in gaps between blades on the impeller; and the clamping claws are prevented from colliding with the blades in the outward moving process.

The invention relates to the technical field of laser dimension detection, and discloses a laser dimension detection device for water pump accessory production, which comprises dimension detection equipment, and the dimension detection equipment is provided with conveying equipment for assembling a plurality of impeller bodies. Meanwhile, under the mutual cooperation of a laser detection assembly and an angle self-adjusting assembly, under the suction effect of an air pump, two suction cup bodies separated from the blade can be tightly attached to the blade, and then under the suction effect of suction cups, a rubber ring fixed to a reset sliding barrel is tightly attached to the blade; according to a traditional detection method, when facing blades with different distortion angles, manual equipment adjustment, clamp replacement or multiple times of measurement are needed to obtain complete data, the operations are time-consuming and labor-consuming, measurement errors are caused by human factors, and the detection accuracy is high. And the laser size detection device automatically adapts to different distortion angles.

The invention relates to the technical field of welding, and particularly discloses an automatic fan impeller welding device which comprises a supporting frame, the supporting frame serves as a carrier to bear a welding part, a rotatable rotary table is rotationally connected to the outer surface of the middle of the supporting frame, an impeller disc and a rotating piece are placed at the upper end of the rotary table, and the rotating piece comprises a rotating cover plate. The rotating cover plate is located above the impeller disc, the blades are welded to the surface of the impeller disc, the upper rotating plate and the lower rotating plate are simultaneously driven by the calibration clamping motor to be matched with the lower clamping rod and the upper clamping rod, the blades are clamped and fixed in four directions, and the blades are limited and clamped. The upper rotating plate and the lower rotating plate move relative to each other through a planetary gear, four-direction fixing is achieved through a calibration clamping motor, the lower end of the calibration clamping motor is fixedly connected with a bearing plate, the lower end of the bearing plate is provided with a calibration plate driven by a calibration spring, the calibration plate further limits the blades, and therefore the calibration effect of the blades is improved. And six-direction clamping is realized by matching with the structure.

The invention provides an impeller high-temperature over-rotation test device. The impeller high-temperature over-rotation test device comprises a long shaft, an impeller, a press-fitting assembly, a buffer assembly and a fixing piece. The long shaft comprises a first shaft body and a second shaft body which are concentric and different in diameter, the impeller is sleeved on the first shaft body, and press-fitting parts are formed at two ends. The first press-fitting assembly and the second press-fitting assembly are pressed on the press-fitting parts on the two sides of the impeller correspondingly, relative rotation is prevented through the rectangular keys, the double press-fitting assemblies are symmetrically arranged to balance axial force, and rotation stability is improved. The left / right clamping sleeve is matched with the conical surface of the left / right taper sleeve, and a tensioning wire groove is formed to adapt to impellers of different sizes and compensate size changes. The buffering assemblies are arranged in a mirror symmetry mode, the horn mouth design optimizes stress distribution, long-axis thermal expansion is absorbed, and vibration impact is resisted. The fixing piece provides axial fixing force, and the axial rigidity of the system is optimized. The device can ensure the reliable positioning of the impeller at high temperature and ultrahigh speed, and improves the test precision and reliability.

The invention discloses a well drilling fracturing device for oil field yield increase, and relates to the technical field of oil field collection, the well drilling fracturing device comprises a fracturing filtering mechanism and a bottom rotating bearing installed in the fracturing filtering mechanism, the bottom of the fracturing filtering mechanism is provided with a connection sealing mechanism, and the bottom of the connection sealing mechanism is provided with a main pipeline; the fracturing filtering mechanism comprises a filtering support, a plurality of sewage draining holes are formed in the outer side of the filtering support, a worm gear limiting cover is fixedly installed at the bottom of the filtering support, rotating supports are symmetrically installed on the side, close to the interior of the worm gear limiting cover, of the filtering support, and rotating motors are fixedly installed on the outer sides of the rotating supports; by utilizing the structural characteristics of the vortex cleaning impeller, when the vortex cleaning impeller rotates anticlockwise, the temporary plugging agent can move towards the inner side of the filter screen cylinder under the action of the groove in the vortex cleaning impeller, so that the conveying efficiency of the temporary plugging agent is improved, and meanwhile, the vortex cleaning impeller can clean the outer surface of the filter screen cylinder.

The present invention provides a swimming pool robot, including: a body; two moving mechanisms disposed on two sides of the body; and a lateral propulsion assembly. The lateral propulsion assembly includes: a lateral flow channel including a fluid inlet and a fluid spraying opening; a lateral impeller disposed inside the lateral flow channel; and a lateral motor configured to drive the lateral impeller to rotate. The fluid spraying opening is disposed on one moving mechanism, so that the lateral flow channel communicates with the outside.

The invention relates to a stress calculation method, device, equipment and medium for a floating type draught fan foundation structure, and the method comprises the steps: carrying out the frequency domain potential flow water power analysis of a wet surface element model of a foundation floating body of a floating type draught fan, and obtaining the water power pressure distribution and a water power coefficient; boundary conditions are applied to the simulation model of the floating type wind turbine foundation structure, various working conditions are loaded, finite element analysis is carried out based on hydrodynamic pressure distribution, and various structural stress transfer functions are obtained; based on the hydrodynamic coefficient, performing linear processing on the fan aerodynamic force, the impeller pneumatic torque, the floating body hydrodynamic force and the mooring restoring force of the floating fan and the influence of a fan servo controller on the floating fan, and substituting a linearization result into a motion equation of the floating fan for calculation to obtain a plurality of dynamic response spectrums; and multiplying the structural stress transfer functions by the corresponding dynamic response spectrums, and adding a plurality of multiplied results to obtain a total stress spectrum. The method can improve the efficiency.

The invention relates to the technical field of wind power generation. The invention provides an emergency yaw and automatic crosswind method and system for a wind turbine generator. The method comprises the following steps: monitoring the on-off state of a safety chain in real time, and activating an emergency power supply switching module when detecting that the safety chain is disconnected; synchronously acquiring unit vibration spectrum, impeller rotating speed, environment wind speed and cabin load distribution data, and generating dynamic risk assessment parameters based on a multi-source signal fusion algorithm; inputting a hierarchical control instruction to a yaw driver according to a comparison result of the risk assessment parameter and a preset threshold value; and in the automatic crosswind control stage, the yaw rate and the angle offset are dynamically adjusted based on the blade root bending moment real-time feedback and the wind speed change rate, so that the unit maintains the aerodynamic load balance in the non-windward state. The problems that after a safety chain of an existing wind turbine generator is disconnected, yaw capacity is completely lost, emergency crosswind protection or fault recovery cannot be achieved, and a traditional emergency yaw scheme is high in cost, complex in maintenance, slow in response, difficult to adapt to complex working conditions and the like are solved.

The invention relates to the technical field of magnetic pumps, and discloses a reverse driving impurity type magnetic pump which comprises a pump chamber, a water inlet, a water outlet and an impurity removal channel are formed outside the pump chamber, an impeller is arranged in the pump chamber, and the impeller is connected with an inner magnetic rotor shaft and is connected with an outer magnetic rotor shaft through a motor to drive rotation. Liquid in the water inlet axially flows into the pump chamber, a suction chamber is arranged in the water inlet and is a conical barrel with the cross section area gradually and uniformly shrunk, an inducer is arranged on the side, facing the water inlet, of the impeller, the inducer and the impeller coaxially rotate, the installation angle of blades of the inducer is small, and flow channels between the blades are long and wide. And the number of the blades is 2-4.

The invention relates to the field of underwater pressurization, and discloses an underwater contra-rotating compressor blade tip leakage flow vibration prediction method and system based on fluid-solid coupling simulation, and the method comprises the steps: carrying out the division of flow field grids and the division of solid domain grids based on a constructed underwater contra-rotating compressor impeller three-dimensional model; establishing a blade flow field CFD model and a blade solid domain FEA model; aNSYS Fluent software is used for conducting underwater contra-rotating compressor three-dimensional unsteady blade flow field simulation so as to obtain unsteady blade tip leakage flow characteristics of a concerned flow field area; an external data module in ANSYS Workbench software is used for loading the aerodynamic force, obtained through unsteady flow simulation, of the surface of the blade to the surface of a blade solid domain FEA model, transmission of the aerodynamic force load between different blade surface grids is achieved, and one-way fluid-solid coupling is achieved; aNSYS Workbench software is used for conducting underwater counter-rotating compressor blade vibration simulation, vibration response of the blade under the combined action of aerodynamic force and centrifugal force is obtained, and the fatigue life of the blade is predicted based on a fatigue model.

1. Name of the designed product: motor impeller. 2. Use of the designed product: used in the motor of a dust collector. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view.

An impeller structure of a dust collector comprises a wheel disc and blades, the wheel disc is of a conical structure with a small end and a large end, any cross sections perpendicular to a center shaft of the conical structure in the conical structure are different in area but consistent in appearance, and the cross sections are circular or regular polygonal in appearance. And the blades are distributed on the outer wall of the conical structure at equal intervals and are spirally arranged along the outer wall of the conical structure. The utility model has the advantages that the small-head end has large air inlet quantity and good air breaking effect, and the large-head end has higher air outlet speed; the conical structure is good in centering performance, the centrifugal effect of the impeller structure during rotation is reduced, the rotating speed is higher, and the service life of a driving shaft for driving the impeller structure to rotate can be prolonged; the arrangement mode of the blades enables the impeller structure to keep good centering performance, meanwhile, the blades are spirally arranged so that air can be better guided to spirally advance, the air outlet effect is further improved, and therefore the dust collection effect of the dust collector is enhanced.

The invention provides an axial force active balancing method for a fluid machine. The axial force active balancing method for the fluid machine comprises the steps that S1, fluid axial force borne by an impeller of the fluid machine during working is obtained; s2, configuring a motor for driving the impeller, and enabling the motor to generate an electromagnetic axial force through design or control; and S3, the direction of the electromagnetic axial force is opposite to that of the fluid axial force, the magnitude of the electromagnetic axial force is controlled to at least partially counteract the fluid axial force, and therefore the net axial load transmitted to the supporting bearing is reduced. The driving motor is actively designed and controlled to generate electromagnetic axial force which is equal to the pneumatic / hydraulic axial force of the impeller in magnitude and opposite to the pneumatic / hydraulic axial force of the impeller in direction, so that zero returning or minimization of net axial force is realized at the bearing.

The invention discloses a high-performance and long-service-life gearbox assembly which comprises a gearbox body, a gear shaft and a gear. The gear shaft is installed in a bearing sleeve through a first rolling bearing. A fan assembly is mounted on the right end shaft section of the gear shaft; the centrifugal fan is characterized in that the fan assembly comprises a shell, a first impeller, a second impeller and a second rolling bearing, the first side wall of the shell is fixedly connected with an end flange of the bearing sleeve, and the first impeller and the second impeller are installed on the right end shaft section and installed in an impeller cavity defined by the shell; the inner peripheral wall of the second impeller is connected with the right end shaft section through a second rolling bearing; the gear shaft can drive the first impeller to rotate in a torque transmission mode, and at the moment, the second impeller passively rotates under the acting force of suction airflow of the first impeller. The suction performance, flow and efficiency of the fan assembly can be improved, so that the heat dissipation effect on the bearing is improved, the heat exchange efficiency of airflow in the gearbox is improved, the operation performance of the gearbox is improved, and the service life of the gearbox is prolonged.

The invention relates to a modular suspension axial magnetic flux shielding pump which comprises a pump shell and a machine shell installed on the pump shell, a pump cavity is formed in the pump shell, a water inlet and a water outlet are formed in the pump shell, a pump shaft is fixedly arranged in the center of the machine shell and extends into the pump cavity, an impeller rotationally installed on the pump shaft is arranged in the pump cavity, and a motor is arranged in the pump cavity. A rotor mounting groove is formed in the surface, facing the machine shell, of the impeller, a rotor module is arranged in the rotor mounting groove, and a rotor shielding sleeve for sealing the rotor mounting groove is arranged on the impeller; a stator installation groove is formed in the machine shell around the pump shaft, a stator module is arranged in the stator installation groove, the stator module and the rotor module are oppositely arranged, and a stator shielding plate for sealing the stator installation groove is arranged on the machine shell. The planar circular ring stator shielding plate is adopted, the manufacturing cost is reduced, the assembly process effect is simplified, the machine shell adopts bilateral water cooling, the motor power density is improved, the motor cost effect is reduced, the stator and rotor modular design is achieved, the rotor module rotates, the pump shaft is fixed, and assembly is simple.

A system includes an inlet pipe, a pressure control valve, a flow-through electric generator, and an outlet pipe. The inlet pipe is connected to a carbon dioxide pipeline that flows carbon dioxide. The pressure control valve is installed on the inlet pipe and is configured to reduce a pressure of the carbon dioxide to a specified pressure. The flow-through electric generator includes a turbine wheel, a rotor, and a stator. The turbine wheel is configured to rotate in response to expansion of the carbon dioxide flowing into an inlet of the turbine wheel and out of an outlet of the turbine wheel. The flow-through electric generator is configured to generate electrical power upon rotation of the rotor within the stator. The outlet pipe is configured to receive the carbon dioxide that has expanded through the flow-through electric generator and flow the carbon dioxide to a carbon dioxide pipeline network.

The utility model discloses a high-speed dewatering semi-automatic pulsator washing machine which comprises an outer barrel body, a pulsator used for cleaning and a detachable dewatering barrel are arranged in the outer barrel body, the high-speed dewatering semi-automatic pulsator washing machine further comprises a driving device used for driving the pulsator and the dewatering barrel to rotate, and an output shaft of the driving device is provided with a first transmission end and a second transmission end. The first transmission end is used for being connected with a speed reducer to output a first rotating speed to the impeller, the second transmission end directly outputs a second rotating speed to be connected with a dewatering barrel, and in the first cleaning mode, the dewatering barrel is not installed, and the impeller independently operates at the first rotating speed in the outer barrel body; according to the utility model, the dewatering effect is better, the time of a user is saved, the use experience of the user is improved, the number of product parts is small, the product structure is simpler and more reliable, the fault probability is reduced, meanwhile, the production and assembly are simple, the production cost is reduced, and the market development is facilitated.

The invention relates to the technical field of non-variable-capacity pump set parallel control, and discloses a multi-blower parallel air volume control method, which comprises the following steps of: acquiring the real-time rotating speed and the real-time input power of a driving frequency converter of each single blower in a parallel system, and superposing a periodic rotating speed perturbation signal at a common pressure given value to obtain a multi-blower parallel air volume control result; power response amplitudes of all single blowers are extracted synchronously, the change rate of real-time power relative to the rotating speed is calculated to generate a power response gradient representing the energy conversion characteristic of the unit, the unbalanced blowers are recognized according to deviation parameters of the power response gradient relative to the global average value, the rotating speed instruction gain of the blowers is reduced, and the unit energy conversion characteristic is obtained. According to the method, load distribution is converted into an active adjustment mechanism based on the physical characteristics of the impeller, accurate identification of the offset of the physical operation sites of the parallel unit is achieved, and the accuracy of the offset of the physical operation sites of the parallel unit is improved on the premise that branch flow sensing hardware is not needed. And the recessive surge risk caused by single-machine performance discretization is inhibited.