305 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 invention discloses a low-axial-force multi-stage turbocharging axial flow pump which comprises a motor, a pump cover and a pump shaft, a connecting flange with a water inlet and a water inlet is arranged on the opposite side of the pump cover, and a plurality of composite guide vane bodies which are arranged on the pump shaft in an empty sleeving mode are fixedly installed between the connecting flange and the pump cover. The composite guide vane body comprises a positioning sleeve, a vane fixing ring, an inner lantern ring, an outer flow deflector and an inner flow deflector, the positioning sleeve is fixedly connected with the pump cover and / or the end of the connecting flange, and the axial length of the positioning sleeve is larger than the axial length of the vane fixing ring and the axial length of the inner lantern ring; an axial flow impeller fixedly sleeved on the pump shaft is arranged in the positioning sleeve of each composite guide vane body, the axial flow impeller comprises an outer wheel column and an inner wheel column, a plurality of outer guide vanes are arranged on the outer wheel column, a plurality of inner guide vanes are arranged between the outer wheel column and the inner wheel column, and the outer guide vanes and the inner guide vanes are opposite in direction; a first flow guide annular channel and a second flow guide annular channel are formed in a shell formed by the pump cover, the composite guide vane body and the connecting flange.

The invention relates to the technical field of axial flow pumps, in particular to a blade angle adjusting device for an axial flow pump and the axial flow pump. The blade angle adjusting device comprises an impeller hub, a flow guide cover is fixedly installed at the bottom of the impeller hub, and a fixing frame inserted into the impeller hub is fixed to the top of the inner wall of the flow guide cover; first mounting holes which are annularly distributed at equal intervals are formed in the circumference of the impeller hub, the inner walls of the first mounting holes are connected with steering shafts through sealing bearings, pump blades are fixedly mounted at one ends of the steering shafts, and steering gears are fixedly mounted at the other ends, extending into the impeller hub, of the steering shafts. According to the axial flow pump, the angles of the pump blades can be flexibly changed, the axial flow pump can operate efficiently under different flow and lift requirements, when the angles are adjusted to be large, the rotating speed of the smashing shaft and the rotating speed of the smashing cutter are synchronously increased, hard objects such as branches are sufficiently and rapidly smashed, and the service life of the smashing cutter is prolonged. And hard objects are prevented from flowing into the axial flow pump along with quickly circulating water to influence the safety performance of the pump body.

The axial flow impeller comprises an impeller body, the impeller body comprises an inner wheel column and a plurality of inner-layer blades arranged on the outer side of the inner wheel column in the circumferential direction, an outer wheel column connected with the outer ends of the inner-layer blades is arranged on the outer sides of the inner-layer blades, and the inner-layer blades are arranged on the outer side of the outer wheel column. A plurality of outer-layer blades are arranged on the outer side of the outer wheel column in the circumferential direction; the inner-layer blades and the outer-layer blades are arc-shaped and face opposite directions; the axial flow pump rotor comprises a rotating shaft and at least one axial flow impeller fixedly connected to the rotating shaft in a sleeving mode, and the axial stress of the axial flow pump rotor meets the following formula: iFZ1 + G = iFZ2 + FT + FF.

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 utility model relates to the technical field of non-variable-capacity pumps, and discloses an axial flow pump which comprises a pump shell, a water outlet is formed in the left side of the pump shell, a fixing frame is fixedly connected to the outer portion of the top end of the pump shell, a motor is fixedly connected to the inner wall of the bottom end of the fixing frame, and a pump shaft is fixedly connected to the driving end of the motor. The inner wall of the pump shell is rotationally connected with a protection frame, a plurality of fixing strips are fixedly connected into the protection frame, a plurality of impellers are fixedly connected to the sides, close to each other, of the fixing strips, and two flange plates are fixedly connected to the outer portion of the pump shell. Displacement or deformation caused by vibration or external loads is reduced, good sealing performance is provided, the sealing device is suitable for a sealing environment with strict requirements, and the quality stability and consistency of products can be guaranteed when filtering equipment is in a good operation state. Regular replacement of the filter screen is helpful for preventing impurities or pollutants from entering the production process.

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 axial flow pump comprises a base, the top of the base is fixedly connected with a driving motor, the axial flow pump further comprises a protective shell, the protective shell is fixedly connected to the top of the base, the inner surface of the protective shell is fixedly connected with an auxiliary assembly, and the side, away from the driving motor, of the auxiliary assembly communicates with a pump body; the outer surface of the pump body communicates with a reinforcing assembly. And the transmission shaft is fixedly connected to the output end of the driving motor, fan blades are fixedly connected to the end, close to the pump body, of the transmission shaft, and a filtering assembly is fixedly connected to the position, close to the fan blades, of the transmission shaft. According to the axial flow pump with the filtering assembly, the situation that filtering of water flow by the filtering assembly is affected when the fan blades rotate is prevented, the filtering assembly filters circulating water flow in the pump body, impurities are not prone to making direct contact with the fan blades when the water flow circulates, and therefore the situation that rotation of the fan blades stops due to the fact that the impurities are wound on the fan blades is avoided.

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 belongs to the technical field of fluid machinery, and particularly relates to an impeller design method for improving anti-cavitation performance of a high-rotating-speed axial flow pump, which comprises the following steps of: determining working condition parameters which at least comprise flow, device net positive suction head, rotating speed, theoretical lift and theoretical suction specific rotating speed, and obtaining the diameter of an inlet rim according to the inner diameter of an inlet pipeline; determining impeller parameters, wherein the impeller parameters at least comprise an inlet hub diameter, an outlet hub diameter, an outlet rim diameter, a rim airfoil profile setting angle and a hub setting angle; determining blade parameters, wherein the blade parameters at least comprise the blade number, the hub axial length, the rim axial length, the hub wrap angle, the inlet rounding radius and the blade thickness; obtaining rim wrap angle data according to the proportional relation of the rim axial length, the outlet rim diameter and the rim airfoil profile setting angle; obtaining designed lift data and designed suction ratio rotating speed data; and determining that requirements are met when the design lift data are greater than the theoretical lift data and the theoretical suction ratio rotating speed data are greater than the design suction ratio rotating speed data.

The large axial flow pump with the filtering and impurity removing functions comprises a pump shell, a filtering unit, a water pump rotating shaft and a driving motor for driving the water pump rotating shaft, the pump shell comprises a water inlet pipe, a water outlet pipe and a connecting bent pipe, and the filtering unit is installed in the water inlet pipe; a rotating wheel is installed at the position of the water pump rotating shaft, rotating blades are fixed to the rotating wheel, and a fixed flow guide plate is further installed at the position of the water inlet pipe. A filtering unit of the axial flow pump can ascend and descend, the axial flow pump is provided with a cutting knife, and the axial flow pump can be switched between a filtering state and a cutting state. According to the axial flow pump, impurities can be well filtered in the pumping process, and the impurities at the filtering unit can be effectively cleaned away well.

The utility model discloses an anti-blocking axial flow pump in the technical field of axial flow pumps, which comprises an axial flow pump and a wall body, and a mounting plate connected with the wall body is arranged on the outer wall of the axial flow pump; a mounting box is arranged on the outer side of the bottom of the axial flow pump, and the bottom of the axial flow pump is located in the mounting box. According to the scheme, one of the filter plates is not blocked by a baffle, impurities in water can be filtered, the impurities in the water can be pumped into the axial flow pump through the mounting box after being filtered by the axial flow pump, and then when the filter plate is blocked, electric telescopic rods on the two sides are started at the same time, so that the impurities in the water can be filtered out, and the water can be pumped into the axial flow pump through the mounting box. When the axial flow pump is used, the baffles corresponding to the blocked filter plates move to block the filter plates, impurities attached to the bottoms of the filter plates can be pushed away, the baffles corresponding to the non-blocked filter plates move and do not block the filter plates any more, it can be guaranteed that one filter plate can be normally used, blocking prevention of the axial flow pump is avoided, and continuous use of the axial flow pump is guaranteed.

The invention relates to the technical field of axial flow pump impeller machining, and discloses a device for machining the outer spherical surface of an axial flow pump impeller and a using method thereof.The device comprises a lathe, a protective door is slidably connected to the surface of the lathe, a support is fixedly connected to the inner wall of the lathe, a supporting table is fixedly connected to the end of the support, and a water tank is fixedly connected to the bottom of the supporting table; the surface of the water tank communicates with a bent pipe, the end, away from the water tank, of the bent pipe communicates with a spray head, a machining table is fixedly connected to the top of the supporting table, a storage groove is formed in the top of the supporting table, and leakage holes are formed in the bottom of the inner wall of the storage groove. After the axial flow pump impeller is placed on the top of the machining table, the clamping component is started to move towards the center of the machining table, the clamping component is used for clamping and fixing the axial flow pump impeller, and after the axial flow pump impeller is placed on the top of the machining table, the clamping component can extrude and fix the axial flow pump impeller through extension; and the convenience of turning the axial flow pump impeller 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 present invention relates to the technical field of protective sleeve forming equipment, and in particular to a shaft protective sleeve forming equipment for an axial flow pump, comprising a base, a first mold and a support shaft, wherein the support shaft is rotatably mounted on the top of the base, and the bottom end of the first mold is connected to the top end of the support shaft; the present invention also comprises a moving device, a supporting device, a power device, a pushing device, a second mold, a feeding pipe, a cylinder and a grinding wheel, wherein the second mold is mounted on the base through the moving device, and the second mold is arranged opposite to the first mold, the feeding pipe is connected and arranged on the second mold, the cylinder is mounted on the supporting device, the supporting device is used to drive the supporting shaft and the cylinder to rotate, move and adjust, and the supporting device is used to clamp and fix the formed shaft protective sleeve, two groups of grinding wheels are oppositely mounted on the power device, and the power device is used to drive the two groups of grinding wheels to rotate and move and adjust; the present invention facilitates the grinding of the finished product while the shaft protective sleeve is being formed, thereby improving work efficiency and convenience of use.

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 utility model discloses a high-stability operation axial flow pump based on multiple bearings. The high-stability operation axial flow pump comprises a pump shell, a connecting pipe, a water inlet pipe, a water inlet horn, a rotating shaft, an impeller, a water guide cone, blades, a fixed guide vane and a motor. An upper containing part, a lower containing part and a plurality of abutting units are installed in the connecting pipe, the upper containing part is provided with an upper containing groove, an upper bearing is placed in the upper containing groove, the lower containing part is provided with a lower containing groove, and a lower bearing is placed in the lower containing groove. According to the axial flow pump, the two bearings are arranged at the connecting pipe to support and limit the rotating shaft, so that vibration and shaking of the rotating shaft during high-speed rotation are reduced, and the pump body operates more stably. The upper bearing and the lower bearing are convenient to install, the stability and reliability of the bearings after installation can be ensured through the abutting unit, and the bearings are convenient to replace and maintain.

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 invention relates to the technical field of flaw detection of axial flow pumps, in particular to assembly flaw detection equipment of an axial flow pump. The cleaning mechanism and the flaw detection mechanism are both mounted on the permeation mechanism; the cleaning mechanism is used for cleaning the impeller of the axial flow pump, the permeation mechanism is used for permeating the impeller of the axial flow pump, and the flaw detection mechanism is used for detecting defects in the impeller of the axial flow pump; the axial-flow pump impeller is placed in the permeation mechanism, oil stains on the surface of the axial-flow pump impeller are cleaned through the cleaning mechanism, then the axial-flow pump impeller is permeated through the permeation mechanism, and defects in the axial-flow pump impeller are detected through the flaw detection mechanism, so that the practicability of the equipment is 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 belongs to the technical field of floating pump stations, and particularly relates to a pontoon type axial-flow pump station, which is characterized in that a pontoon body comprises a buoy, a vertical pump cylinder is arranged on the pontoon body, an axial-flow pump is mounted at the lower end of the pump cylinder, a water outlet is arranged at the upper end of the pump cylinder, and the water outlet is higher than a motor for driving the axial-flow pump. According to the pontoon type axial flow pump station, the pump cylinder can be automatically filled with water when the axial flow pump works through the design of the pump cylinder, and therefore it is guaranteed that the motor driving the axial flow pump is always immersed in the flowing water body. According to the mode, sufficient cooling of the motor in the working process is effectively guaranteed, and serious consequences such as efficiency reduction, short service life and even burnout caused by overheating of the motor are avoided. No matter how the water level or the draft degree of the ship body changes, effective heat dissipation of the motor can be ensured.

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.