250 results about "Axial-flow pump" patented technology

The invention relates to the technical field of axial flow pumps, and discloses an oil-gas multiphase pump blade tip leakage flow restraining structure, a design method and an oil-gas multiphase pump, the leakage flow restraining structure comprises an impeller blade, a groove is formed in the top of the impeller blade, and the projection of the groove in a plane perpendicular to the skeleton line direction of the impeller blade is trapezoidal. According to the structural design of the trapezoidal grooves at the tops of the blades of the impeller, vortex and turbulent flow on the surface of the impeller are effectively scattered through fine regulation and control of fluid, impact and abrasion of the fluid to the impeller are reduced, and therefore the vibration level of the multiphase pump is remarkably reduced, and the service life of the impeller is prolonged.

The present invention relates to the technical field of axial flow pumps, and particularly relates to a blade angle adjustment device for an axial flow pump and an axial flow pump, including a hub. A flow guide cover is fixedly installed at the bottom of the hub, and a fixing frame inserted into the hub is fixed to the top of the inner wall of the flow guide cover. A plurality of first mounting holes are formed at equal intervals in a circular distribution on the circumference of the hub, and the inner walls of the first mounting holes are all connected with steering shafts through sealed bearings. One end of each steering shaft is fixedly installed with a pump blade, and the other end of each steering shaft extending into the hub is fixedly installed with a steering gear. The present invention can flexibly change the angle of the pump blade, enabling the axial flow pump to maintain efficient operation under different flow rate and head requirements. When the angle adjustment is large, the rotation speeds of the crushing shaft and the crushing knives are synchronously increased to fully and quickly crush hard objects such as tree branches, avoiding the influence of some hard objects flowing into the interior of the axial flow pump along with the rapidly flowing water on the safety performance of the pump body.

The invention discloses a multi-objective optimization design method and system for an axial-flow circulating pump, and belongs to the technical field of evaporative crystallization systems.The method comprises the steps that design variables are selected to construct a multi-objective optimization model, the design variables are associated with geometric parameter sizes of an axial-flow pump full-flow-channel parameterization model, initial fluid dynamics calculation is executed, and a multi-objective optimization model is constructed; obtaining an initial data set containing a design variable-performance response mapping relation, and performing parameter sensitivity analysis on the initial data set to screen key design variables; on the basis of the initial data set, an optimal approximation model is adaptively selected for the key design variables, multi-objective optimization is carried out, and a Pareto optimal solution set is determined; uncertain factors are introduced for robustness evaluation, a target design scheme is determined, and after fluid dynamics verification is carried out, the design scheme of the design variables of the axial flow type circulating pump is obtained. According to the method, an optimization process with high integration, automatic iteration and intelligent learning is constructed, and rapid, accurate and steady multi-objective optimization design of the axial flow pump hydraulic model is realized.

The present application relates to the technical field of axial flow pumps, and particularly relates to a self-cleaning axial flow pump. The self-cleaning axial flow pump comprises a water guide shell, a fixed shell and a first bolt frame are fixedly connected to the upper side of the water guide shell, the first bolt frame is fixedly connected with the fixed shell, a rotating shell is rotatably connected to the first bolt frame, a driving motor is fixedly connected to the water guide shell, the water guide shell and the fixed shell are rotatably connected with a rotating shaft, and the rotating shaft is fixedly connected with an impeller at one end in the water guide shell. The present application is aimed at the problem that the eccentric rotation of the impeller caused by unbalanced load or poor assembly further causes the collision between the impeller and the pump body and causes damage, and proposes a design combining real-time monitoring and split connection. The design forms an active connection between the impeller and the power source, and when the monitoring system detects the abnormality of the impeller, the connection between the two is automatically disconnected, so that the potential damage of the impeller and other key components is effectively avoided.

The utility model discloses an axial flow pump pipeline blockage alarm structure in the technical field of axial flow pumps, which comprises a pipeline body serving as a main body of the mechanism to provide installation positions for other components, a water inlet pipe is fixedly connected to the right side wall of the pipeline body, and a water outlet pipe is fixedly connected to the left side wall of the pipeline body. A connecting frame is clamped to the right side of the top of the pipeline body, a filter plate is fixedly connected to the bottom of the connecting frame, the bottom of the filter plate penetrates through the pipeline body and extends to the bottom of an inner cavity of the pipeline body, the alarm mechanism is used for detecting whether the pipeline is blocked or not and giving an alarm after blockage is detected, and the alarm mechanism comprises a mounting frame; the axial flow pump pipeline blockage alarm structure is reasonable in structural design, the situation that a worker cannot find the blockage condition in the pipeline in time can be effectively prevented, the filtering mechanism can be rapidly and conveniently mounted and dismounted, and cleaning work of the filtering mechanism is facilitated.

A double-outlet vertical axial flow pump is arranged between an inland river gate and an outer river gate and comprises a water inlet horn, a guide vane body, a pump support and a water outlet elbow pipe are sequentially installed above the water inlet horn, a lower guide bearing part is connected into the guide vane body, and the upper end of the water outlet elbow pipe is connected with an upper guide bearing part. A pump shaft is arranged between the lower guide bearing part and the upper guide bearing part in a penetrating mode, the bottom of the pump shaft penetrates through the lower guide bearing part to be connected with a rotor part, two outlets are formed in the upper portion of the water outlet bent pipe, one outlet is connected with a water diversion pipe, the water diversion pipe faces an inland river gate, and a water diversion valve is arranged on the water diversion pipe. The other outlet of the water outlet elbow pipe is connected with a flood drainage pipe, the flood drainage pipe faces the outer river gate, and a flood drainage valve is arranged on the flood drainage pipe. Compared with the prior art, the double-outlet vertical axial flow pump has the advantages that the water outlet bend is of a double-outlet structure and is used in cooperation with the valve, and the two functions of flood drainage and water diversion can be achieved at the same time.

The invention relates to the technical field of fluorine axial flow pumps, and discloses a clamping plate type fluorine axial flow pump with a self-cleaning function, which comprises a pump shell, a liquid outlet pipe arranged at the upper end of the pump shell, a liquid pumping pipe arranged on the side wall of the pump shell, and a filtering unit arranged on the side wall of the liquid pumping pipe and used for filtering solution impurities, the filtering unit comprises a self-cleaning part arranged on the side wall of the liquid pumping pipe; by arranging the self-cleaning part, when the filter plate is blocked, the pressure intensity of an impeller area can be continuously reduced along with rotation of an impeller, when the pressure intensity is reduced to a certain degree, the filter plate is driven to slide in the horizontal direction, the drainage box is communicated with a filter cavity and an inflow cavity in the sliding process, and the flowing path of a solution is changed, so that the solution flows into the drainage box; through the drainage component, the solution entering the filter cavity flushes impurities accumulated in front of the filter plate into the drainage box at a certain angle to be collected, once the filter plate is dredged, the pressure intensity at the impeller is increased, and the filter plate reset pump operates normally.

The utility model discloses a blade of an axial flow pump, which belongs to the technical field of axial flow pumps and comprises a blade body, and a first wing blade and a second wing blade are fixedly connected to a pressure surface and a suction surface of the blade body respectively. The first wing cutter strip and the second wing cutter strip are respectively fixed at the same blade height of the blade main body; and the chord lengths of the first wing blade and the second wing blade are equal to those of the blade height corresponding to the blade main body. By means of the first wing cutter strips and the second wing cutter strips, secondary backflow formed on the hub side at the outlet of the impeller can be weakened in a physical interception mode when flow is reduced.

According to the open-channel multichannel ultrasonic flowmeter verification system, water in a reservoir is pumped out through an axial flow pump, then water flow is buffered through a buffer pool, when the water flows into a channel unit, the water is blocked through an overflow plate and then treated through a flow stabilizing grid, and then stable water flow with a certain height is formed; after the water flows to the middle and downstream positions of the channel unit, the water passes through the ultrasonic flow meter, the ultrasonic flow meter measures the flow rate, flow velocity and other numerical values of the stable water flow, and the numerical values are all received by the control unit and then are stored, processed and analyzed. The working efficiency of the axial flow pump and the opening degree of the valve plate of the drainage door unit can be adjusted separately or jointly, so that different testing environments are formed, the control unit obtains more basic data, and the verification accuracy is improved.

The invention provides a two-way axial flow pump energy loss reduction method based on flow characteristic improvement, and relates to the technical field of two-way axial flow pump optimization. Comprising the following six steps: establishing a reference two-way axial flow pump physical model, establishing and calibrating a reference two-way axial flow pump simulation model, identifying and quantifying a dominant energy loss source, establishing an optimization scheme of the dominant energy loss source, simulating and comparing the optimization scheme, and iterating and formulating the optimization scheme. According to the method, a solid foundation is laid for optimization design by calibrating a simulation performance curve and ensuring the reliability of a numerical model, then a key energy loss source is quantitatively analyzed by adopting an entropy yield method, directional design is carried out based on a flow mechanism, the optimization efficiency and effect are remarkably improved, energy loss is reduced, and finally, through a perfect iterative optimization mechanism, the optimization efficiency is improved. And in combination with the preset target threshold value and experimental verification, it is ensured that the optimization scheme meets the actual requirement, and therefore effective reduction of the energy loss of the two-way axial flow pump is achieved.

The present invention relates to a rotary tilting plate axial piston pump (1) for pumping liquids, comprising: a head (25); a plurality of cylinders (30) formed in the head (25) in a number greater than two, the plurality of cylinders (30) having axes (C) parallel to each other and arranged radially about a common axis (A) parallel to the axes of the cylinders; a plurality of pistons (75) each piston slidably inserted into a corresponding cylinder (30) of the plurality of cylinders (30) for pumping liquids; and a plurality of delivery pipes (145) formed in the head (25), each of the plurality of delivery pipes (145) extending directly from the corresponding cylinder (30) to a corresponding delivery valve (120) and arranged transversely to the axis (C) of the corresponding cylinder. The head (25) has a first side (61) and a second side (62), the second side (62) being opposite to the first side (61) with respect to an imaginary orthographic plane (S), the imaginary orthographic plane (S) including the common axis (A) and parallel to the axis (C) of the cylinder (30), wherein the plurality of cylinders (30) includes a first arranged cylinder and a second arranged cylinder, the axis (C) of the first arranged cylinder being between the first side (61) and the imaginary orthographic plane (S), and the axis (C) of the second arranged cylinder being between the second side (62) and the imaginary orthographic plane (S). A delivery conduit (145) extending from a cylinder (30) in the first arranged cylinder extends from the respective cylinder (30) toward the first side (61), and a delivery conduit extending from a cylinder in the second arranged cylinder extends from the respective cylinder (30) toward the second side (62).

The application relates to the technical field of axial flow pumps, in particular to an inclined axial flow pump with a composite lubrication anti-deviation wear structure, which comprises a pump shaft and a pump body assembly, the pump shaft penetrates through the pump body assembly, a guide vane pipe is arranged in the pump body assembly, a water guide bearing is rotatably arranged in the guide vane pipe, a harmonic reducer is arranged on the water guide bearing and is in transmission connection with the pump shaft through the harmonic reducer, an upper positioning ring is arranged in the guide vane pipe, and the upper positioning ring and the water guide bearing are provided with a power circulation mechanism which is matched with each other. The harmonic reducer is used for transmission and speed reduction, when the pump shaft is driven to rotate, the water guide bearing can be synchronously driven to rotate, the position of a bearing bush in the water guide bearing is periodically adjusted, local pressure concentration of the bearing bush is avoided, and wear aggravation is avoided; meanwhile, when the water guide bearing rotates, the power circulation mechanism can be synchronously driven to move, and lubricating and cooling medium is pushed to circularly flow in a lubricating and cooling flow channel of the water guide bearing.

The invention relates to the field of fluid machinery, in particular to an axial flow pump which comprises a spring seat, a movable ring seat, a movable ring and a circumferential limiting assembly, the spring seat is used for being connected to a rotating shaft, the spring seat and the rotating shaft are axially fixed, the spring seat and the rotating shaft are circumferentially fixed, the movable ring seat is used for being connected to the rotating shaft, and the movable ring seat is used for being connected to the rotating shaft. The spring seat and the rotating shaft slide axially, the circumferential limiting assembly is arranged between the spring seat and the rotating ring seat, so that the spring seat and the rotating ring seat are fixed circumferentially, and the circumferential limiting assembly is arranged between the rotating ring seat and the rotating ring, so that the rotating ring seat and the rotating ring are fixed circumferentially. Through the multi-stage circumferential limiting design, the reliable fixing problem between the moving ring assembly and the rotating shaft is effectively solved, and the sealing performance and operation stability of the axial flow pump under high-speed rotation or complex working conditions are remarkably improved.

The application discloses a kind of magnetic fluid sealing rim impeller structures for inhibiting blade tip clearance leakage, including pump shell, be provided with blade in pump shell, a circle of blade cover plate is equipped in the periphery of blade, blade cover plate and pump shell have sealing gap in radial direction, one or more magnetic fluid sealing rings are arranged in sealing gap along the axial direction;Magnetic force structure is arranged in the outer wall of pump shell in annular, magnetic concentration structure is arranged in the inner wall of pump shell in annular, closed magnetic circuit is formed between magnetic concentration structure and magnetic force structure, so that gradient magnetic field is formed at sealing gap;Magnetic fluid is adsorbed and positioned in the corresponding area of sealing gap under the action of gradient magnetic field, and forms a magnetic fluid sealing ring which is consistent with the shape of sealing gap, continuous and stable.The application utilizes the self-positioning characteristics of magnetic fluid under magnetic field, forms dynamic, self-adapting sealing interface between blade cover plate and pump shell, realizes zero leakage operation, improves the hydraulic efficiency and stability of axial flow pump unit.

The utility model discloses a submersible axial flow pump lifting and cable protecting device, which comprises a hoisting mechanism and an adjusting mechanism, and is characterized in that the hoisting mechanism comprises an I-shaped piece, four cross-shaped wing plates arranged on the periphery of the I-shaped piece, and a waist plate fixedly connected with the bottom of the I-shaped piece; an upper lifting lug is arranged on the top part of the I-shaped piece, a lower lifting lug is arranged at the bottom of the waist plate, a plurality of pressing plates are arranged in the length direction of the waist plate, each pressing plate is connected with the waist plate through a fixing bolt, and a gap between each pressing plate and the waist plate can be adjusted by rotating the corresponding fixing bolt; the top of each wing plate is provided with an adjusting mechanism. Due to the structural design, it is guaranteed that the cable is not affected by water flow in the operation process of the submersible axial-flow pump, shaking of the pump body is reduced, and the operation stability of the submersible axial-flow pump is improved.

The application discloses an anti-heeling pump with a blockage prevention function, and relates to the application field of the anti-heeling pump of a ship. The anti-heeling pump comprises a bidirectional axial flow pump, and a blockage prevention purification system is arranged on the side of the bidirectional axial flow pump. The blockage prevention purification system comprises a water inlet filter screen, a filtering mechanism, a flocculent filtering assembly and a coarse filter cylinder. The blockage prevention purification system is arranged at both ends of the bidirectional axial flow pump, and impurities in ballast water are filtered. When water in a right ballast water tank is transported to a left ballast water tank, the ballast water enters the water inlet pipe of the right blockage prevention purification system, is filtered by the water inlet filter screen, enters the axial flow pump, then enters the left blockage prevention purification system, and reversely flushes the water inlet filter screen of the left blockage prevention purification system. Subsequently, the ballast water is discharged from the water outlet pipe of the left blockage prevention purification system and enters the left ballast water tank. In the whole operation process of the pump set, the ballast water flowing through the axial flow pump is filtered by the water inlet filter screen, and damage of impurities to the pump body is reduced.

This invention relates to the field of axial flow pump technology, and in particular to a drag reduction device for a bulb-type axial flow pump based on non-smooth walls and its usage method. The drag reduction device includes several connectors, several non-smooth wall devices, and passive settling control devices corresponding to each non-smooth wall device. One end of each passive settling control device is connected to the inner wall of the bulb body, and the other end is connected to the corresponding non-smooth wall device. By absorbing the fluid vibration energy during the flow process, it drives the non-smooth wall device to reciprocate along the radial direction of the bulb body. The several non-smooth wall devices are evenly arranged in the circumferential and axial directions of the bulb body, and adjacent non-smooth wall devices are in close contact with both sides of the connectors. The outer surface of each non-smooth wall device has an inwardly concave curved surface. Through this drag reduction device and its usage method, near-wall turbulent dissipation can be further reduced, turbulent resistance can be reduced, and energy efficiency can be improved.

1. Name of the product in this design: Axial Flow Pump (120 cubic meters). 2. Purpose of this design: This design is used for conveying liquids. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

A submersible axial flow pump transportation bracket comprises a wooden base, an adjusting support, a middle support and a tail support are arranged on the front portion and the rear portion of the wooden base respectively, the adjusting support comprises an adjusting supporting seat base, the adjusting supporting seat base is installed on the wooden base, and a pair of adjusting blocks capable of being adjusted left and right is symmetrically arranged on the adjusting supporting seat base. An adjustable V-shaped opening is formed between the upper ends of the adjusting blocks, the middle support and the tail support comprise a middle support base and a tail support base, the middle support base and the tail support base are installed on the wooden base, and fixed V-shaped openings are formed in the upper portion of the middle support base and the upper portion of the tail support base respectively. Compared with the prior art, the transportation bracket for the submersible axial flow pump is simple in structure, convenient to use, low in cost compared with a bracket made of pure steel and higher in reliability compared with a bracket made of pure wood.

The utility model provides a mounting tool for an angle adjusting mechanism of a full-adjustment vertical axial flow pump. The mounting tool comprises a base plate, a positioning bearing assembly, a supporting adjusting column, a gradienter and a dial indicator. The lower portion of the base plate is provided with three positioning bearing assemblies which are evenly distributed in the circumferential direction, one positioning bearing assembly is provided with a bearing radial adjusting mechanism, the base plate is provided with three supporting adjusting columns which are evenly distributed in the circumferential direction, and the gradienter and the dial indicator are installed on the top face of the base plate. By arranging the rotatable base plate, the positioning bearing assembly, the supporting adjusting column, the gradienter and the dial indicator, the mounting condition of the angle adjusting mechanism of the full-adjustment vertical axial flow pump can be precisely measured, the mounting precision is greatly improved, the angle adjusting mechanism is flexible and reliable in action, tight in matching and free of jamming after being mounted, and the mounting precision is greatly improved. The matching precision between the bearing bushes is high, a large amount of oil leakage is avoided, the holding time of the pressure in the cavity is obviously prolonged, the starting interval time of the oil pump is prolonged, the labor cost and the time cost of installation are reduced, and the installation precision is improved.

This invention discloses a blade angle measurement and signal transmission device for a vertical shaft axial flow pump. The device may include: a displacement feedback mechanism, one end of which is hinged to the other end of an operating rod; a sliding displacement sensor, the displacement signal input end of which is connected to the displacement feedback mechanism to measure the displacement distance of the displacement feedback mechanism; and a voltage signal acquisition device, electrically connected to the displacement signal output end. This invention uses a displacement sensor to convert the displacement signal of the displacement feedback mechanism into an electrical signal, which is then acquired and transmitted by the voltage signal acquisition device. This allows the device to perform real-time measurement, automatic reading, and data uploading during pump operation. Furthermore, the device maintains the required accuracy for blade angle measurement during rotation, ensuring that the detected blade angle signal is not distorted or interrupted, thus fulfilling the need for real-time blade angle monitoring.

The invention discloses an ultralow-lift impeller vortex grid bionic design method for blade drag reduction, and relates to the technical field of water conservancy machinery and pump station engineering, and the method comprises the following specific steps: screening out candidate axial flow pump blades meeting target ultralow-lift working condition requirements; constructing a groove structure parameter data set, obtaining blade performance simulation data corresponding to each groove structure parameter group by utilizing numerical simulation, and constructing a sample set; based on the sample set, performing hyper-parameter optimization and training on a pre-constructed neural network model to obtain a neural network prediction model; and obtaining blade performance simulation data corresponding to each groove structure parameter group in the groove structure parameter data set of the to-be-analyzed blade by using the trained neural network prediction model, and determining an optimal groove structure parameter by using a non-dominated sorting genetic algorithm. According to the method, the optimal groove structure parameters for remarkably reducing the flow resistance and optimizing the flow characteristics of the surface of the impeller can be quickly obtained, and the overall performance of the ultralow-lift axial flow pump device is improved.

The utility model discloses a thermal power plant building construction drainage device which comprises a foundation pit, a steel sleeve with an opening in the upper end is arranged in the foundation pit, water permeable holes are evenly distributed in the side wall of the steel sleeve, filter screens are arranged in the water permeable holes, a filter plate is arranged at the opening end of the steel sleeve, an axial flow pump is arranged in the steel sleeve, the axial flow pump is connected with a water pumping pipe, and the water pumping pipe penetrates through the filter plate. According to the scheme, through cooperation of the steel sleeve, the filter plate, the filter screen, the axial flow pump and the like, efficient filtering and rapid water pumping are achieved, and the technical effects of being simple in structure, low in cost, suitable for complex environments, capable of guaranteeing construction safety and the like are achieved.

The utility model relates to the field of motor detection, and discloses an axial flow pump motor installation and balance integrated verification device, which comprises a workbench, an axial flow pump motor body and a connecting seat, a first motor is arranged in the workbench, an output end of the first motor is fixedly connected with a gear, a sliding rod is fixedly connected in the workbench, and the sliding rod is fixedly connected with the axial flow pump motor body. A rack is slidably connected to the outer wall of the sliding rod, the rack is in meshed connection with the gear, a connecting block is fixedly connected to the upper surface of the rack, a supporting plate is fixedly connected to the upper surface of the connecting block, a vibration sensor is arranged on the upper surface of the supporting plate, and a second motor is fixedly connected to the interior of the connecting base. A transmission assembly is arranged at the output end of the second motor. According to the utility model, the clamping inspection of the axial flow pump motors with different sizes is realized, the problem that the existing inspection equipment is inconvenient to inspect the axial flow pump motors with different lengths is solved, the applicability and efficiency of the motor inspection are improved, the tensioning of the belt is realized, and the accuracy of the inspection is improved.

The invention discloses a closed type hydroelectric power generation system, and relates to the technical field of hydroelectric power generation. A closed type hydroelectric power generation system comprises a plurality of sets of power generation devices, a first water storage tank, a hydraulic ram, an axial flow pump and a second water storage tank, the multiple sets of power generation devices are arranged in the hydroelectric power generation system and connected through pipelines, the tail ends of the sets of power generation devices are connected with the first water storage tank through pipelines, and the water storage tank is connected with the water storage tank through pipelines. The reservoir I is connected with the hydraulic ram and the axial flow pump through pipelines, the hydraulic ram is connected to the starting end of the complete power generation device through a pipeline, and the axial flow pump is connected with the reservoir II through a pipeline. Water flow is pressurized through the hydraulic ram and then conveyed to the starting end of the complete set of power generation device to form circulating power, the axial flow pump conveys redundant water to the second water storage pool to be stored and adjusted, efficient utilization of water resources and continuous power generation are achieved, and good environmental adaptability and popularization value are achieved.

The utility model discloses an axial flow pump with a filtering anti-blocking device, which belongs to the field of axial flow pumps, and comprises a pump seat, the top of the pump seat is fixedly connected with a pump body, the top of the pump seat is provided with a mounting hole, one end of the pump body is fixedly connected with a plunger assembly, and the side surface of the plunger assembly is provided with a filtering assembly; the filter assembly comprises a connecting pipe, one end of the connecting pipe is fixedly connected to the side end of the plunger assembly, the inner side face of the connecting pipe is connected with a filter plate through a bolt, and the side face of the filter plate is fixedly connected with an adjusting plate. Through cooperative use of all the devices, a pressure adapting plate sliding in an adjusting plate is affected by water pressure, a pressure spring is extruded to contract and slides towards the interior of the adjusting plate, an auxiliary filtering set is opened, at the moment, water flows into the adjusting plate and is discharged through the auxiliary filtering set, and then according to the size of the water flow, the filtering effect is improved. And self-adaptive adjustment is carried out, so that water outlet blockage caused by overlarge water flow is avoided.

The invention provides a vibration processing and designing method and device for an axial flow pump and electronic equipment. The vibration processing and designing method and device for the axial flow pump are characterized in that an excitation source of high-frequency vibration comes from a standing wave in a guide vane; the method comprises the steps that if the ratio of the sound standing wave frequency on the guide vane blade to the inherent frequency of one of the vibration modes of the guide vane blade under the working condition is smaller than a preset threshold value, mechanical parameters of the guide vane blade are changed so as to change the inherent frequency of the guide vane blade, for example, the part length of the guide vane blade is cut off, therefore, the staggering rate between the sound standing wave frequency and the inherent frequency of the guide vane blade can be increased, resonance is avoided, the amplitude of hydraulic excitation caused by the fact that the distance between the impeller and the guide vane is too close can be reduced, and the vibration response of the blade is reduced. The other method comprises the steps that the ratio of the inherent frequency and the sound standing wave frequency of each mode of the guide vane blade is adjusted to reach the preset threshold value in the design stage of the axial flow pump, and the problems of high-frequency vibration and noise of the axial flow pump are solved from the design link.

The utility model relates to vertical axial flow pump technical field, concretely relates to a special tool for measuring vertical axial flow pump stator and rotor center height difference, including water inlet horn and casing, and the casing includes guide vane body and elbow pipe, the upper surface of water inlet horn sets up guide vane body, and impeller assembly is set up below in guide vane body. The utility model can be detachably arranged in the inside of casing through chuck, because the chuck claw of chuck is movable setting, chuck can be supported in the inside of casing through chuck claw, and chuck can adapt to the casing of different inner diameters after the movement of chuck claw, because it can solve the poor adaptability problem of different models vertical axial flow pump, adopts the grating micrometric sensor of 0.001mm resolution and solves the problem of insufficient measurement accuracy, and the chuck is arranged in the inside of casing, realizes the measurement process in the casing, and reduces the preparation work before testing.

The utility model relates to the technical field of centrifugal axial flow pumps, and discloses a traction type centrifugal axial flow pump. The traction type centrifugal axial flow pump comprises a centrifugal axial flow pump body and a traction frame, the centrifugal axial flow pump body is arranged on the traction frame, and the traction frame comprises two supporting beams, a plurality of connecting beams, moving wheels, a traction component and a plurality of supporting frames. And the material use and manufacturing complexity are reduced, and the manufacturing cost is remarkably reduced. The traction component is connected with the front end of the supporting beam and movably connected with a tractor, so that the traction type centrifugal axial flow pump can be quickly mounted and dismounted, and the labor intensity and the time cost of operators are reduced.

The invention relates to the technical field of hydroelectric power generation equipment, in particular to a planetary gear system for adjusting the two-way working condition of an axial flow pump and a design method of the planetary gear system for adjusting the two-way working condition of the axial flow pump. The flow guide cone is rotatably arranged on one side of the main impeller, a main shaft of the main impeller extends downwards to the top of the flow guide cone, telescopic flow guide blades are arranged on the outer wall of the flow guide cone, and a flow guide cone tail end bearing is arranged at the bottom of the flow guide cone; the planetary gear set comprises a sun gear, a planet gear, fixed teeth and a planet carrier, the sun gear is fixed to the extending end of the main shaft of the main impeller, the planet carrier can be rotationally arranged in the flow guide cone, and the fixed teeth are distributed on the circumference of the top of the inner wall of the flow guide cone to form an inner gear ring. Through the synergistic effect of the planetary gear system and the candidate tooth mechanism, efficient adjustment of the two-way working condition of the axial flow pump is achieved, and the comprehensive energy efficiency and the operation economical efficiency of the pumped storage unit are greatly improved.