CN116624396A - Multistage centrifugal pump - Google Patents
Multistage centrifugal pump Download PDFInfo
- Publication number
- CN116624396A CN116624396A CN202210844066.3A CN202210844066A CN116624396A CN 116624396 A CN116624396 A CN 116624396A CN 202210844066 A CN202210844066 A CN 202210844066A CN 116624396 A CN116624396 A CN 116624396A
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- guide vane
- motor
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- controller
- guide
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 61
- 230000017525 heat dissipation Effects 0.000 claims abstract description 37
- 210000004907 gland Anatomy 0.000 claims abstract description 14
- 230000007704 transition Effects 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 23
- 238000009434 installation Methods 0.000 claims description 19
- 230000008676 import Effects 0.000 claims description 8
- 238000009423 ventilation Methods 0.000 claims description 7
- 238000005452 bending Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/007—Details, component parts, or accessories especially adapted for liquid pumps
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The application discloses a multistage centrifugal pump which comprises a controller, a motor, a pump shaft and a base, and is characterized in that the controller is integrated with the motor, a plurality of impellers are arranged on the pump shaft, guide vanes are arranged on the outer sides of the impellers, an inlet gland is arranged at the upper end of the base, and a tensioning strip is connected between the inlet gland and the guide vane at the uppermost end. The application has the advantages that the water leakage of the interstage guide vane can be reduced, and the pump efficiency is improved; the motor shaft and the pump shaft are integrally formed, so that the coaxiality of the pump shaft and the motor shaft is improved, and the running stability of the pump is improved; the controller is integrated to the upper end of the motor, unified heat dissipation of the controller and the motor is realized, the occupied space of the multistage pump is reduced, the heat dissipation efficiency of the motor and the controller is improved, and the heat dissipation cost is reduced.
Description
Technical Field
The application relates to the technical field of centrifugal pumps, in particular to a multistage centrifugal pump.
Background
The multistage centrifugal pump is formed by integrating more than two centrifugal pumps with the same function, and the medium pressure relief port of the first stage is communicated with the inlet of the second stage in the fluid channel structure, and the medium pressure relief port of the second stage is communicated with the inlet of the third stage, so that the multistage centrifugal pump is formed by the mechanism connected in series. The multi-stage centrifugal pump has the meaning of increasing the set pressure.
For example, in chinese patent literature, an intelligent multistage centrifugal pump with patent number cn20162053694. X, grant publication 1/4/2017, includes: a runner is arranged between the pump body, the outer shell and the guide vane support body; the coupler is connected with the pump shaft; the impeller is inserted on the pump shaft to rotate so as to suck and pressurize fluid from the inlet; the guide vane is accommodated in the guide vane support body, and the liquid pressurized by the impeller is collected to reduce the flow rate and is discharged through the outlet; the variable frequency motor includes: the motor body and the motor shaft axially connected with the coupler also comprise a variable frequency controller integrally arranged in the motor body, and the variable frequency motor drives the pump shaft to rotate through the motor shaft and the coupler.
The defects in the prior art are as follows: 1. the inter-stage pump is subjected to water pressure when water flows move, gaps are easy to appear, so that water leakage is caused, and the energy efficiency of the water pump is seriously affected; 2. the motor shaft is connected with the pump shaft through the coupler, coaxiality is difficult to control, and the pump shaft is difficult to install and calibrate, so that the operation stability of the pump is affected; 3. the controller is arranged on the side face of the motor, the structure occupies large space, the assembly cost is high, the controller and the heat dissipation of the motor are carried out separately, and the heat dissipation cost is high.
Disclosure of Invention
Based on the defects in the prior art, the application provides a multistage centrifugal pump which can reduce water leakage of an interstage guide vane and improve pump efficiency.
The motor shaft and the pump shaft are integrally formed, so that the coaxiality of the pump shaft and the motor shaft is improved, and the operation stability of the pump is improved.
The third purpose of the application is to integrate the controller to the upper end of the motor, realize the unified heat dissipation of the controller and the motor, reduce the occupied space of the multistage pump, improve the heat dissipation efficiency of the motor and the controller, and reduce the heat dissipation cost.
In order to achieve the above object, the present application adopts the following technical scheme.
The utility model provides a multistage centrifugal pump, includes controller, motor, pump shaft and base, and characterized by, controller and motor integration set up, are equipped with a plurality of impeller on the pump shaft, and the impeller outside is equipped with the stator, and the base upper end is equipped with the import gland, is connected between import gland and the stator of uppermost and is equipped with the tensioning strip.
The guide vane and the guide shell are tensioned through the cooperation of the inlet gland and the tensioning strip, so that leakage of water between stages is reduced, hydraulic loss is reduced, and efficiency of the multistage pump is improved.
Preferably, the motor includes a motor shaft, and the pump shaft is integrally provided with the motor shaft of the motor. The coaxiality of the pump shaft and the motor shaft is improved, and the running stability of the pump is improved.
Preferably, the base comprises an inner cylinder and an outer cylinder which are concentrically arranged, the inner cylinder is connected with an inlet transition section, the outer cylinder is connected with an outlet transition section, the outer end of the inlet transition section is provided with an inlet flange seat, the outer end of the outlet transition section is provided with an outlet flange seat, and the cross section of the inlet transition section is in a splayed shape with a large opening facing the inner cylinder. The cross section of the outlet transition section is also in a splayed shape with a large opening facing the inner cylinder; in the prior art, the inlet transition section and the outlet pipeline are straight cylinders, so that the hydraulic performance is poor, and the hydraulic loss can be effectively reduced by adopting the splayed diffusion type design compared with the straight cylinder type design of the inlet pipeline and the outlet pipeline.
Preferably, the bottom surface of the outer barrel is higher than the bottom surface of the outlet transition section. The bottom surface position of the outer cylinder is improved to be higher than the bottom surface of the outlet pipeline, the contact area between the bottom surface of the cavity between the inner cylinder and the outer cylinder and the outlet transition section is increased, and the hydraulic loss at the position can be effectively reduced.
Preferably, the impeller comprises a front cover plate, blades and a rear cover plate which are sequentially arranged, the front cover plate comprises a circular water inlet section and a water guide section with a semi-parabolic cross section, and the outer end of the water guide section is provided with a water return section which inclines to the side where the water inlet section is positioned; the rear cover plate is fixedly provided with a hub section which is matched with the pump shaft, the rear side of the hub section is provided with a guide section which is matched with the water guide section, and the blades are arranged between the guide section and the water guide section. The water inlet section water flows out to the radial direction of the impeller after being guided by the rotation of the blades, the traditional impeller has no water return section, and the water flow flows out forwards to generate axial reaction force on the impeller, so that the axial force can be reduced and the service life of the bearing can be prolonged by arranging the water return section; the hydraulic design rated rotation speed of the impeller is increased to 5000-6000 revolutions per minute, the single-stage lift is greatly increased, the outer diameter of the impeller can be smaller than that of the impeller in the prior art, the design point is in a high-efficiency range compared with the rotation speed, and the hydraulic efficiency is remarkably improved.
Preferably, the guide vanes comprise an inner guide vane and an outer guide vane, the inner guide vane is connected to the upper side of the outer end of the impeller, the outer guide vane comprises a lower guide vane, a middle guide vane and an upper guide vane which are sequentially arranged from bottom to top, the lower guide vane corresponds to the lower side of the impeller, the upper guide vane corresponds to the upper side of the inner guide vane, the middle guide vane is connected to the lower guide vane and the upper guide vane, and a flow baffle corresponding to the upper side of the impeller is arranged on the inner guide vane. The guide of the water flow between the inter-stage impellers is realized through the guide vanes, a reliable water flow path is provided, the cavity structure at the rear side of the impellers is changed through the arrangement of the flow baffle, hydraulic loss can be reduced, liquid leakage is reduced, and pump efficiency is improved.
Preferably, the opposite ends of the upper and middle guide vanes are arranged tangentially. Smooth transition of water flow between the middle guide vane and the upper guide vane is realized, hydraulic loss caused by collision and backflow of the water flow is avoided, and the efficiency of the water pump is improved.
Preferably, the outside of the guide vane is coated with a guide shell, the uppermost end of the guide vane is a tail end guide vane, and the two ends of the tail end guide vane are respectively abutted to the outside of the impeller water outlet and the guide port. The tensioning strip is connected with the tail end guide vane and the inlet gland, so that compression between the guide vanes is realized, meanwhile, compression of the guide shell is also realized, hydraulic loss is further reduced, and flow leakage is reduced.
Preferably, the controller comprises a lower controller shell and an upper controller shell, a controller installation cavity is formed between the lower controller shell and the upper controller shell, the controller installation cavity comprises a mounting plate arranged on the lower controller shell, a main control circuit board and a control panel are arranged in the controller installation cavity, a heat dissipation cavity is arranged at the lower end of the lower controller shell, a radiator is arranged in the heat dissipation cavity by the mounting plate, an air inlet communicated with the heat dissipation cavity is formed in the wall surface of the lower controller shell, the motor comprises a motor shell and a motor rear end cover, the lower controller shell is fixedly connected with the motor rear end cover, a fan blade installation cavity is arranged between the lower controller shell and the motor rear end cover, a motor shaft of the motor extends into the fan blade installation cavity, heat dissipation fan blades fixed on the motor shaft are arranged in the fan blade installation cavity, communicated ventilation holes are formed between the fan blade installation cavity and the heat dissipation cavity, and the ventilation holes are coaxially and oppositely arranged; the motor shell is provided with a cooling channel communicated with the fan blade installation cavity.
The controller is arranged at the top of the vertical pump, and has the advantages of small and compact structure, novel appearance and convenient operation; in the prior art, the controller is arranged on the side surface of the motor and shares a motor fan with the motor, and only about 1/4 of the air quantity of the motor flows through the radiating fins of the controller, so that the air quantity is enough to ensure the radiating effect of the controller, the diameter of the fan is overlarge, and the noise of the fan is increased; the heat dissipation area is large enough, so that the volume of the controller shell is overlarge, the manufacturing cost is increased, the air cooling is adopted, a set of fan cooling system is shared with the motor, but the cooling channel is uniquely designed, air flows sequentially pass through the air inlet, the heat dissipation cavity, the ventilation holes, the fan blade mounting cavity and the cooling channel, the controller adopts air suction cooling, the motor adopts air blowing cooling, and all air volumes are effectively used for cooling, so that the utilization rate of the cooling system is greatly improved; the lower shell of the controller integrates a motor fan cover into a whole, and the whole structure is more compact.
Preferably, the radiator comprises a plurality of radiating fins which are arranged in parallel, a plurality of air inlets are respectively arranged at two ends of the radiating fins corresponding to the lower shell of the controller, and the plurality of air inlets are arranged in a rectangular array. The air inlet efficiency is improved, the convection of cooling air flow to the radiator is guaranteed, and the heat radiation efficiency is improved.
The application has the following beneficial effects: the water leakage of the interstage guide vane can be reduced, and the pump efficiency is improved; the motor shaft and the pump shaft are integrally formed, so that the coaxiality of the pump shaft and the motor shaft is improved, and the running stability of the pump is improved; the controller is integrated to the upper end of the motor, unified heat dissipation of the controller and the motor is realized, the occupied space of the multistage pump is reduced, the heat dissipation efficiency of the motor and the controller is improved, and the heat dissipation cost is reduced.
Drawings
Fig. 1 is a schematic structural view of a first embodiment of the present application.
Fig. 2 is a schematic structural view of a second embodiment of the present application.
Fig. 3 is a schematic view of the structure of the base in the embodiment shown in fig. 1.
Fig. 4 is a transverse cross-sectional view of the base shown in fig. 3.
Fig. 5 is a schematic structural view of a lower housing of the controller according to the present application.
Fig. 6 is an internal cross-sectional view of the connection portion of the controller and motor of the present application.
Fig. 7 is a schematic structural view of a guide vane applied in a third embodiment of the present application.
FIG. 8 is a schematic cross-sectional view of the impeller of the embodiment of FIG. 1.
Fig. 9 is a left side view of fig. 8.
In the figure: the controller 1 lower casing 101 controller upper casing 102 controller mounting cavity 103 mounting plate 104 main control circuit board 105 control panel 106 heat dissipation cavity 107 radiator 108 air inlet 109 fan blade mounting cavity 110 heat dissipation fan blade 111 vent 112 cooling channel 113 motor 2 motor shaft 201 motor casing 202 motor housing 203 pump shaft 204 base 3 inner barrel 301 inner barrel 302 inlet transition section 303 outlet transition section 304 outlet flange seat 305 outlet flange seat 306 drain screw plug 307 impeller 4 front cover 401 water inlet section 402 water guide section 403 water return section 404 blade 411 back cover 421 hub section 423 inlet gland 5 tension bolt 502 end guide vane 601 first guide vane 603 second guide vane 604 annular vane 605 buckle 606 inner vane 611 lower vane 612 upper vane 613 614 guide vane 615 baffle shell 615 baffle 616 pump barrel 7.
Detailed Description
The application is further illustrated in the following, in conjunction with the accompanying drawings and specific embodiments.
In the case of example 1,
as shown in fig. 1, a multistage centrifugal pump comprises a controller 1, a motor 2, a pump shaft 204 and a base 3, wherein the controller 1 and the motor 2 are integrally arranged, and the motor adopts a permanent magnet synchronous motor. Referring to fig. 1, 5 and 6, the controller 1 includes a lower controller housing 101 and an upper controller housing 102, a controller installation cavity 103 is provided between the lower controller housing 101 and the upper controller housing 102, the controller installation cavity 103 includes a mounting plate 104 provided on the lower controller housing 101, a main control circuit board 105 and a control panel 106 are provided in the controller installation cavity 103, and an operation screen is provided at an upper end of the upper controller housing 102 and is communicated with the control panel 106. The lower end of the lower controller shell 101 is provided with a heat dissipation cavity 107, a radiator 108 is arranged in the heat dissipation cavity 107 by the mounting plate 104, an air inlet 109 communicated with the heat dissipation cavity 107 is arranged on the wall surface of the lower controller shell 101, the motor comprises a motor shaft 201, a stator and rotor assembly, a motor shell 202, a motor front end cover and a motor rear end cover 203, the lower controller shell 101 is fixedly connected with the motor rear end cover 203, a fan blade mounting cavity 110 is arranged between the lower controller shell 101 and the motor rear end cover 203, the motor shaft 201 of the motor stretches out of the fan blade mounting cavity 110, a heat dissipation fan blade 111 fixed on the motor shaft 201 is arranged in the fan blade mounting cavity 110, a communicated air vent 112 is arranged between the fan blade mounting cavity 110 and the heat dissipation cavity, and the heat dissipation fan blade 111 and the air vent 112 are coaxially and oppositely arranged; the motor housing 202 is provided with a cooling channel 113 communicated with the fan blade mounting cavity 110. The radiator 108 comprises a plurality of radiating fins which are arranged in parallel, and the radiating fins are made of aluminum profiles. The controller lower shell 101 is correspondingly provided with a plurality of air inlets 109 at two ends of the radiating fins respectively, and the plurality of air inlets 109 are arranged in a rectangular array. The air intake, the heat dissipation cavity 107, the ventilation hole 112, the fan blade mounting cavity 110 and the cooling channel 113 form a cooling air duct.
The pump shaft 204 is integrally provided with the motor shaft 201 of the motor. Eight impellers 4 are arranged on the pump shaft 204 in a clearance mode, namely an eight-stage pump corresponding to the embodiment. As shown in fig. 8 and 9, the impeller 4 comprises a front cover plate 401, a blade 411 and a rear cover plate 421 which are sequentially arranged along the water flow outflow direction, the front cover plate 401 comprises a circular water inlet section 402 and a water guide section 403 with a semi-parabolic cross section, and a water return section 404 which is inclined to the side where the water inlet section 402 is arranged at the outer end of the water guide section 403; on the cross section of the impeller 4, the included angle between the backwater section 404 and the tangent line at the outer end of the water guide section 403 is between 0 and 15 degrees. The rear cover plate 421 is fixedly provided with a hub section 422, the hub section 422 is matched with the pump shaft 204, the rear cover plate 421 is provided with a guide section 423 matched with the water guide section 403 at the rear side of the hub section 422, and the blades 411 are arranged between the guide section 423 and the water guide section 403. The vane 411 is fixedly integrally provided with the back plate 421. The inside of hub section 422 is provided with a cross slot through which radial synchronous drive is achieved with the cross section on pump shaft 204. The pump shaft 204 is provided with a sleeve to limit the distance between the adjacent impellers 4. The water entering the water inlet section 402 flows out to the radial direction of the impeller 4 after being guided by the rotation of the blades, the traditional impeller 4 is not provided with a water return section 404, and the water flow flows out forwards to generate axial reaction force on the impeller 4; the hydraulic design rated rotation speed of the impeller 4 is increased to 5000 to 6000 revolutions per minute, the single-stage lift is greatly increased, the outer diameter of the impeller 4 can be smaller than that of the impeller in the prior art, the design point is in a high-efficiency range compared with the rotation speed, and the hydraulic efficiency is remarkably improved.
The outside of the impeller 4 is provided with guide vanes, the base 3 is provided with a pump cylinder 7, the upper end of the base 3 is provided with an inlet gland 5, and a tensioning strip 501 is connected between the inlet gland 5 and the guide vane at the uppermost end. The uppermost end of the guide vane is a tail end guide vane 601, the axial section of the tail end guide vane 601 is in arc bending, and two ends of the tail end guide vane 601 are respectively abutted to the outer sides of the water outlet and the diversion port of the impeller 4. The tensioning strip 501 is connected with the end guide vane 601 and the inlet gland 5, as shown in fig. 1, other guide vanes below the end guide vane 601 in the embodiment all comprise a diffusion guide vane 602 corresponding to the lower side of the impeller 4 and a first guide vane 603 corresponding to the upper side of the impeller 4, a second guide vane 604 arranged in a gap between the first guide vane 603 and the second guide vane 604 is arranged on the upper side of the first guide vane 603, an annular guide vane 605 is integrally arranged on the lower side of the second guide vane 604, the annular guide vane 605 also has the function of a guide shell 615, the upper end of the annular guide vane 605 and the outer end of the second guide vane 604 are integrally connected to form a folded angle with rounded transition, the lower end of the annular guide vane 605 is provided with a bending part 606, and the bending part 606 can be attached and clamped on the outer side of the folded angle to realize butt joint between the adjacent annular guide vanes 605. The inlet gland 5 is provided with a connecting block, the connecting block is provided with a tension bolt 502 in a threaded connection manner, one end of the tension bar 501 is fixedly connected with the tail end guide vane 601, the other end of the tension bar 501 is fixedly connected with the tension bolt 502, the tension of the tension bar 501 can be realized by adjusting the screw tightening degree of the tension bolt 502, further compression between the guide vanes is completed, and water leakage is reduced. When the impeller 4 rotates, water is thrown out to a folded angle position from an inlet section of the impeller 4 under the action of blades, then flows into a space between the first guide vane 603 and the second guide vane 604 in a reflection way, and further enters the impeller 4 of the next stage, so that the multi-stage impeller 4 is used for supplying water.
Referring to fig. 1, 3 and 4, the base 3 includes an inner cylinder 301 and an outer cylinder 302 concentrically arranged, and a drain plug 307 is provided on the inner cylinder 301 for draining water. The inner cylinder 301 is connected and is equipped with import changeover portion 303, and the urceolus 302 is connected and is equipped with export changeover portion 304, and the outer end of import changeover portion 303 is equipped with import flange seat 305, and the outer end of export changeover portion 304 is equipped with export flange seat 306, and the cross section shape of import changeover portion 303 is big mouth towards the "eight" font of inner cylinder 301. The end of the inlet transition section 303 facing the inner cylinder 301 is elliptical, the end of the inlet transition section 303 facing away from the inner cylinder 301 is circular, the diameter of the circular shape is equal to the minor axis of the ellipse, and the transverse dimension of the end of the inlet transition section 303 facing away from the inner cylinder 301 is gradually increased towards the inner cylinder 301, so that gradual-change-shaped water guide is formed. The bottom surface of the outer barrel 302 is higher than the bottom surface of the outlet transition 304. The bottom surface of the inner barrel 301, the bottom surface of the inlet transition section and the bottom surface of the outlet transition section 304 are equal in height.
In the case of example 2,
as shown in fig. 2, a multistage centrifugal pump is different from embodiment 1 mainly in that six impellers 4 are provided in this embodiment, the water pump is a six-stage pump, and no backflow section is provided outside the impellers 4. Unlike the guide vane structure of embodiment 1, the guide vane is coated with a guide casing 615, and the upper and lower ends of the guide casing 615 are respectively provided with a bending part 606 to realize clamping and positioning. The other guide vanes except the end guide vane 601 comprise an inner guide vane 611 and an outer guide vane, the inner guide vane 611 is connected to the upper side of the outer end of the impeller 4, the outer guide vane comprises a lower guide vane 612, a middle guide vane 613 and an upper guide vane 614 which are sequentially arranged from bottom to top, the lower guide vane 612 corresponds to the lower side of the impeller 4, the upper guide vane 614 corresponds to the upper side of the inner guide vane 611, the middle guide vane 613 is connected to the lower guide vane 612 and the upper guide vane 614, and the opposite ends of the upper guide vane 614 and the middle guide vane 613 are tangentially arranged. The opposite ends of the upper guide vane 614 and the middle guide vane 613 are provided with convex edges for fitting, and are fixedly pressed with the guide shell 615 through the convex edges. The guide vanes are matched in a multi-section mode, and the guide casing 615 on the outer side is added, so that water leakage of the guide vanes between the stages can be reduced, and pump efficiency is improved; the motor shaft 201 and the pump shaft 204 are integrally formed, so that the coaxiality of the pump shaft 204 and the motor shaft 201 is improved, and the running stability of the pump is improved; the controller is integrated to the upper end of the motor, unified heat dissipation of the controller and the motor is realized, the occupied space of the multistage pump is reduced, the heat dissipation efficiency of the motor and the controller is improved, and the heat dissipation cost is reduced.
In the case of example 3,
as shown in fig. 7, embodiment 3 differs from embodiment 2 only in that a baffle 616 corresponding to the upper side of the impeller 4 is provided on the inner vane 611. The outside of the baffle 616 is connected with the inner end of the inner guide vane 611, and the height of the lower end of the baffle 616 is the same as the height of the lower end of the inner guide vane 611. The guide of water flow between the inter-stage impellers 4 is realized through the guide vanes, a reliable water flow path is provided, the rear cavity structure of the impellers 4 is changed through the arrangement of the flow baffle 616, hydraulic loss can be reduced, liquid leakage is reduced, and pump efficiency is improved.
According to the application, the guide vane and the guide shell 615 are tensioned by the inlet gland 5 matched with the tensioning strip 501, so that leakage of water between stages is reduced, hydraulic loss is reduced, and the efficiency of the multistage pump is improved. The controller is arranged at the top of the vertical pump, and has the advantages of small and compact structure, novel appearance and convenient operation; in the prior art, the controller is arranged on the side surface of the motor and shares a motor fan with the motor, and only about 1/4 of the air quantity of the motor flows through the radiating fins of the controller, so that the air quantity is enough to ensure the radiating effect of the controller, the diameter of the fan is overlarge, and the noise of the fan is increased; the heat dissipation area is large enough, so that the volume of the controller shell is overlarge, the manufacturing cost is increased, while the application also adopts air cooling to cool and shares a set of fan cooling system with the motor, the cooling channel 113 is uniquely designed, air flows sequentially pass through the air inlet, the heat dissipation cavity 107, the ventilation hole 112, the fan blade mounting cavity 110 and the cooling channel 113, the controller adopts air suction cooling, the motor adopts air blowing cooling, and all air quantity is effectively used for cooling, so that the utilization rate of the cooling system is greatly improved; the lower shell 101 of the controller integrates a fan cover of the motor, and the whole structure is more compact.
Claims (9)
1. The utility model provides a multistage centrifugal pump, includes controller, motor, pump shaft and base, its characterized in that, the integrated setting of controller and motor is equipped with a plurality of impeller on the pump shaft, and the impeller outside is equipped with the stator, and the base upper end is equipped with the import gland, is connected between import gland and the stator of uppermost and is equipped with the tensioning strip.
2. The multistage centrifugal pump according to claim 1, wherein the motor comprises a motor shaft, and the pump shaft is integrally provided with the motor shaft of the motor.
3. The multistage centrifugal pump according to claim 1, wherein the base comprises an inner cylinder and an outer cylinder which are concentrically arranged, the inner cylinder is connected with an inlet transition section, the outer cylinder is connected with an outlet transition section, the outer end of the inlet transition section is provided with an inlet flange seat, the outer end of the outlet transition section is provided with an outlet flange seat, and the cross section of the inlet transition section is in an eight shape with a large opening facing the inner cylinder.
4. The multistage centrifugal pump according to claim 1, wherein the impeller comprises a front cover plate, blades and a rear cover plate which are sequentially arranged, the front cover plate comprises a circular water inlet section and a water guide section with a semi-parabolic cross section, and a water return section which is inclined to the side where the water inlet section is arranged at the outer end of the water guide section; the rear cover plate is fixedly provided with a hub section which is matched with the pump shaft, the rear side of the hub section is provided with a guide section which is matched with the water guide section, and the blades are arranged between the guide section and the water guide section.
5. The multistage centrifugal pump according to claim 1 or 4, wherein the guide vanes comprise an inner guide vane and an outer guide vane, the inner guide vane is connected to the upper side of the outer end of the impeller, the outer guide vane comprises a lower guide vane, a middle guide vane and an upper guide vane which are sequentially arranged from bottom to top, the lower guide vane corresponds to the lower side of the impeller, the upper guide vane corresponds to the upper side of the inner guide vane, the middle guide vane is connected to the lower guide vane and the upper guide vane, and a baffle plate corresponding to the upper side of the impeller is arranged on the inner guide vane.
6. The multistage centrifugal pump according to claim 5, wherein the opposite ends of the upper and middle vanes are tangentially disposed.
7. The multistage centrifugal pump according to claim 5, wherein the outer side of the guide vane is coated with a guide shell, the uppermost end of the guide vane is a tail end guide vane, and two ends of the tail end guide vane are respectively abutted to the outer sides of the impeller water outlet and the guide port.
8. The multistage centrifugal pump according to claim 1, wherein the controller comprises a lower controller shell and an upper controller shell, a controller installation cavity is arranged between the lower controller shell and the upper controller shell, the controller installation cavity comprises a mounting plate arranged on the lower controller shell, a main control circuit board and a control panel are arranged in the controller installation cavity, a heat dissipation cavity is arranged at the lower end of the lower controller shell, a radiator is arranged in the heat dissipation cavity by the mounting plate, an air inlet hole communicated with the heat dissipation cavity is arranged on the wall surface of the lower controller shell, the motor comprises a motor shell and a motor rear end cover, the lower controller shell is fixedly connected with the motor rear end cover, a fan blade installation cavity is arranged between the lower controller shell and the motor rear end cover, a motor shaft of the motor extends into the fan blade installation cavity, heat dissipation fan blades fixed on the motor shaft are arranged in the fan blade installation cavity, communicated ventilation holes are arranged between the fan blade installation cavity and the heat dissipation cavity, and the ventilation holes are coaxially and oppositely arranged; the motor shell is provided with a cooling channel communicated with the fan blade installation cavity.
9. The multistage centrifugal pump according to claim 8, wherein the radiator comprises a plurality of radiating fins arranged in parallel, a plurality of air inlet holes are respectively formed in the lower controller shell at two ends of the radiating fins, and the plurality of air inlet holes are arranged in a rectangular array.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210844066.3A CN116624396A (en) | 2022-07-18 | 2022-07-18 | Multistage centrifugal pump |
| PCT/CN2022/138379 WO2024016570A1 (en) | 2022-07-18 | 2022-12-12 | Multistage centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210844066.3A CN116624396A (en) | 2022-07-18 | 2022-07-18 | Multistage centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116624396A true CN116624396A (en) | 2023-08-22 |
Family
ID=87596043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210844066.3A Pending CN116624396A (en) | 2022-07-18 | 2022-07-18 | Multistage centrifugal pump |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN116624396A (en) |
| WO (1) | WO2024016570A1 (en) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2115486B1 (en) * | 1994-12-20 | 1999-02-16 | Bogemar Sl | MULTICELLULAR CENTRIFUGAL ELECTRIC PUMP. |
| JP3971018B2 (en) * | 1998-02-24 | 2007-09-05 | Ｓｍｃ株式会社 | Immersion pump |
| CN2752491Y (en) * | 2004-11-19 | 2006-01-18 | 广州市白云泵业制造有限公司 | Vertical multi-stage centrifugal pump |
| CN102628451A (en) * | 2012-04-26 | 2012-08-08 | 朱学斌 | Centrifuge pump with reversely arranged last stage blade for balancing axial force |
| JP6375216B2 (en) * | 2014-12-08 | 2018-08-15 | 株式会社日立産機システム | Vertical multistage pump |
| CN105626548A (en) * | 2016-01-21 | 2016-06-01 | 池泉 | Intelligent pipeline pump |
| CN105673574B (en) * | 2016-03-18 | 2018-06-29 | 池泉 | Low noise centrifugal multistage pump multiple centrifugal pump |
| CN107461339A (en) * | 2016-06-03 | 2017-12-12 | 苏州赟羽机电科技有限公司 | A kind of intelligent centrifugal multistage pump multiple centrifugal pump |
| CN207813944U (en) * | 2017-12-15 | 2018-09-04 | 上海中航泵业股份有限公司 | A kind of vertical multi-stage centrifugal pump |
| CN216241329U (en) * | 2021-11-23 | 2022-04-08 | 阿科斯(大连)泵业有限公司 | Multistage centrifugal pump |
-
2022
- 2022-07-18 CN CN202210844066.3A patent/CN116624396A/en active Pending
- 2022-12-12 WO PCT/CN2022/138379 patent/WO2024016570A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024016570A1 (en) | 2024-01-25 |
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