CN112253485A - Impeller cantilever type full-through-flow pump - Google Patents
Impeller cantilever type full-through-flow pump Download PDFInfo
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- CN112253485A CN112253485A CN202011214173.5A CN202011214173A CN112253485A CN 112253485 A CN112253485 A CN 112253485A CN 202011214173 A CN202011214173 A CN 202011214173A CN 112253485 A CN112253485 A CN 112253485A
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- guide vane
- rotating wheel
- bearing
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 63
- 239000004576 sand Substances 0.000 claims abstract description 48
- 238000001914 filtration Methods 0.000 claims abstract description 31
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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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
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0606—Canned motor pumps
-
- 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
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/043—Shafts
- F04D29/044—Arrangements for joining or assembling shafts
-
- 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
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
- F04D29/047—Bearings hydrostatic; hydrodynamic
- F04D29/0476—Bearings hydrostatic; hydrodynamic for axial pumps
-
- 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
- F04D29/08—Sealings
- F04D29/086—Sealings especially adapted for liquid pumps
-
- 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
- F04D29/18—Rotors
- F04D29/181—Axial flow rotors
-
- 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
- F04D29/18—Rotors
- F04D29/20—Mounting rotors on shafts
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/548—Specially adapted for liquid pumps
-
- 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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
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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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
-
- 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
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to an impeller cantilever type full tubular pump which mainly comprises a guide vane, a motor shell, a motor stator, a motor rotor, a water inlet bell pipe, a shaft and a rotating wheel, wherein the guide vane is arranged on the motor shell; the motor of the full-tubular pump is arranged on the periphery of the impeller and has a larger diameter, so that compared with the traditional motor, the motor of the full-tubular pump can use less materials to obtain the same kinetic moment, and the weight of the device is reduced. By adopting the rotating wheel cantilever type structure, the diameter of the hub at the inlet of the impeller can be reduced in design, the inlet flow rate of the rotating wheel is reduced, and the cavitation resistance is improved. The guide vane, the motor shell and the rotor of the invention adopt a structural design which can finish the turning of the whole part by clamping once, thereby improving the assembly precision. The sand filtering component is added to prevent fine sand from entering the gap between the stator and the rotor of the motor, so that the running stability of the unit is ensured. The invention has the advantages of high operation stability, smooth water inlet, high assembly precision and the like.
Description
Technical Field
The invention relates to a tubular submersible electric pump, in particular to an impeller cantilever type tubular pump.
Background
The tubular pump is formed by integrating a motor and a water pump set, the central lines of water inlet and outlet channels of the tubular pump are positioned on the same straight line, the hydraulic loss is small, the water lifting efficiency is high, the structure is compact, the installation and the maintenance are convenient, and the pump station engineering is simple. The full tubular submersible electric pump further optimizes the structure of the existing tubular pump, and the inner circle of the rotor of the motor is directly fixed on the outer circle of the impeller, so that the hydraulic loss caused by the clearance of the impeller is reduced. The motor of the total-through flow pump is arranged at the periphery of the impeller and has a larger diameter, so that compared with the traditional motor, the axial size of the total-through flow pump is short, and the weight of the device is reduced. The full tubular pump on the market all is that the axle has all adopted the structure that both ends supported, like the novel full tubular submersible pump that CN201521462U disclosed, be connected the impeller with the axle through the bearing of installing in wheel hub, its advantage is: the impeller can shorten the axial length through shafts with two ends respectively fixed on the front guide vane and the rear guide vane. However, with the use of leading vanes, problems can arise. Firstly, the front guide vane can generate a larger displacement effect, so that the inlet flow velocity is improved, and hydraulic loss is generated; meanwhile, the flow velocity at the inlet of the impeller is increased, the anti-cavitation performance of the pump is reduced, the performance of the pump is influenced, abnormal vibration is caused, and the service life of the pump is shortened. For a full tubular pump with a pump shaft fixed on front and rear guide vanes respectively, three problems still exist: firstly, the structure necessarily needs to use two mechanical seals to protect the bearing, so that the cost is increased, and meanwhile, the leakage point is increased; secondly, when oil needs to be supplemented for the impeller bearing, the machine must be stopped firstly and then operated; and then, the pump shaft is respectively fixed on the front guide vane and the rear guide vane, the front guide vane and the rear guide vane are fixed with two ends of the motor shell, the motor shell can be machined only by secondary clamping, so that a certain position deviation exists between the rabbets at two ends of the motor shell, the gap between the rotor and the stator is not uniform, for the full through-flow motor with the stator and the rotor completely filled with water, the outer diameter of the rotor is much larger than that of the common motor, the linear velocity of the outer diameter of the rotor is also much larger, the gap deviation of the stator and the rotor can cause the generation of an uneven liquid film, so that a large radial force is generated to act on the stator winding and the outer diameter of the rotor, and great damage is caused. These problems directly result in the limited availability of the full tubular pump in the market, and have not always led to a more mature market.
In order to solve the problems, the invention adopts a rotating wheel cantilever type structure, cancels a bearing seat of a traditional full tubular pump in a front guide vane, only keeps the bearing seat in the guide vane, improves the original cylindrical impeller hub into a conical impeller hub, obviously reduces the hub diameter at the inlet position of an impeller, reduces the inlet flow speed of the pump in the operation process, meets the requirement of efficient and stable operation of a unit, and further reduces the weight of the device.
Disclosure of Invention
The invention relates to an impeller cantilever type full-through-flow pump, which adopts a runner cantilever type structure, and compared with the traditional structure that two ends are respectively fixed on a front guide vane and a rear guide vane, the impeller cantilever type full-through-flow pump has the advantages of reducing leakage points, ensuring smoother water inlet, preventing a water inlet flared pipe from winding and blocking, ensuring uniform clearance between a stator and a rotor of a motor and the like.
The technical scheme adopted for realizing the purpose is as follows:
the utility model provides an impeller cantilever type full tubular pump, mainly includes stator, motor casing, motor stator, motor rotor, the horn pipe that intakes, wash-out awl, bearing I, bearing II, axle, runner and glib talker, its characterized in that: the rotating wheel is fixedly arranged in the motor rotor and is fixed on the shaft; the guide vane is arranged in the water outlet side direction of the rotating wheel and further comprises guide vane blades and a bearing seat; the shaft is fixed and supported by a bearing I and a bearing II, and the bearing I and the bearing II are arranged in a cavity of the bearing seat.
The impeller cantilever type full tubular pump according to claim 1, wherein the rotating wheel is fixed with the shaft through an impeller nut, and a gap is left between the rotating wheel and the bearing seat; and one end of the rotating wheel, which is far away from the bearing seat, is provided with a water guide cone. A water drainage cone is further installed at the position, close to the outlet of the device, of the bearing seat, and a sealing seat is fixedly installed at one end, close to the rotating wheel, of the bearing seat; the seal seat and the drain cone limit axial displacement of the bearing I and the bearing II together; the guide vane is arranged at one end of the motor shell, the other end of the motor shell is connected with the water inlet flared tube, and the motor stator is fixed in the motor shell; the guide vanes, the water inlet flared tubes and the adjacent pipelines are connected in a flange connection or quick joint connection mode; the inner wall surface of the water inlet flared tube is provided with a pre-rotation preventing blade, and a gap is reserved between the pre-rotation preventing blade and the outer wall of the water guide cone.
The impeller cantilevered full tubular pump of claim 1 wherein the motor stator, motor rotor is a permanent magnet motor or an asynchronous motor.
The impeller cantilever type full-through flow pump of claim 2, wherein a nozzle is arranged on the wash-out cone, so that oil can be conveniently added into a cavity formed by the wash-out cone, the bearing seat, the sealing seat and the mechanical seal.
The impeller cantilever type full tubular pump according to claim 2, wherein a conical surface is processed at one end of the water inlet flared tube close to the rotating wheel, and a conical surface is processed at a position close to the water inlet flared tube inside the motor rotor; the gap between the two conical surfaces is a conical surface gap; the outflow port of the conical surface gap points to the rotating wheel, and when a medium in the device flows from the water outlet to the water inlet of the rotating wheel through the gap between the motor stator and the motor rotor, the inclined surface gap can provide impact flow pressurization for the inlet edge of the rotating wheel, so that the cavitation resistance is improved.
The impeller cantilever type full-through pump according to claim 2, wherein the inner hole of the bearing seat adopts a through hole with the same diameter, the turning of the whole part can be completed by clamping once in the processing process of the guide vane, namely, one-off cutting, and the verticality of the inner hole of the bearing seat and the plane of the guide vane contacting with the motor shell is improved.
The impeller cantilever type full through-flow pump according to claim 6, wherein the inner wall surface of the motor casing and the plane of the motor casing contact guide vane can be machined in one step, and the verticality of the inner wall surface of the motor casing and the plane of the motor casing contact guide vane is improved.
The impeller cantilever type full-tubular pump of claim 7, wherein after the rotating wheel is fixedly connected with the motor rotor, one-off machining of the inner hole of the rotating wheel and the outer edge of the motor rotor can be realized, and the concentricity of the inner hole of the rotating wheel and the outer edge of the motor rotor is improved.
The impeller cantilever type full-through flow pump of claim 1, wherein a sand filtering component is arranged in a cavity formed by the guide vane, the motor shell, the motor stator and the motor rotor; the sand filtering component comprises a front baffle, a centrifugal impeller fixing frame, a sand filtering cover and a centrifugal impeller; the front baffle is processed on the outer wall surface of the guide vane close to the motor rotor, and a gap is reserved between the outer edge of the front baffle and the inner wall surface of the sand filtering cover.
The impeller cantilever type full-through flow pump of claim 9, wherein the sand filter is fixed on one side of the guide vane close to the motor casing, a central hole is processed on one side of the sand filter close to the motor rotor, the centrifugal impeller fixing frame passes through the central hole and leaves a gap with the front baffle, and the other end of the centrifugal impeller fixing frame is fixed on one side of the motor rotor close to the water outlet end; the centrifugal impeller fixing frame and the motor rotor can be integrated; the centrifugal impeller is fixed on the centrifugal impeller fixing frame, and blades of the centrifugal impeller are positioned between the front baffle and the sand filtering cover; when the motor rotor rotates, the centrifugal impeller can be driven by the centrifugal impeller fixing frame to rotate, centrifugal force is generated, and clear water in a medium flowing through the sand filtering assembly is separated from impurities; the processing has the runner on the stator, consider that the position processing that the sand cover is close to the centrifugal impeller outer fringe has the sand setting chamber, the runner has connected sand setting chamber and external for discharge because the sedimentary impurity of centrifugal impeller centrifugal action.
The invention has the beneficial effects that:
1. the impeller cantilever type full-through flow pump adopts the runner cantilever type structure, so that the shaft does not need the fixed constraint of the front guide vane, the use of a bearing seat in the front guide vane is reduced, and the total quality of the device is reduced.
2. The impeller cantilever type full-through flow pump can protect the bearing chamber by only one mechanical seal, reduces leakage points, reduces the leakage risk in the device,
3. according to the impeller cantilever type full-tubular pump, the rotating wheel hub adopts the conical structure, so that the displacement effect of the impeller inlet is reduced, the inlet flow velocity is reduced, the hydraulic loss is reduced, and the cavitation resistance of the device is improved.
4. According to the impeller cantilever type full-through-flow pump, the guide vane, the motor shell and the rotor are of a structural design which can finish turning of the whole part through one-time clamping, and the assembly precision is improved.
5. According to the impeller cantilever type full-through flow pump, the sand filtering component is added to prevent fine sand from entering a gap between the stator and the rotor of the motor, so that the operation stability of a unit is ensured.
Drawings
FIG. 1 is a schematic structural view of a cantilever-type full-tubular pump with an impeller according to the present invention.
FIG. 2 is another structural schematic diagram of the cantilever type full-through-flow pump with the impeller of the present invention.
FIG. 3 is a schematic structural diagram of a sand filtering assembly of a full-through-flow pump with a cantilever impeller according to the present invention.
FIG. 4 is a schematic diagram of a bevel gap structure of a cantilever-type full-through-flow pump with an impeller according to the present invention.
FIG. 5 is a schematic view of the flow inside the motor chamber of the full tubular pump with cantilever impeller according to the present invention.
In the figure: 1. the centrifugal water pump comprises guide vanes, 2 parts of a motor shell, 3 parts of a motor stator, 4 parts of a motor rotor, 5 parts of a water inlet flared pipe, 6 parts of a water drainage cone, 7 parts of a bearing I, 8 parts of a bearing II, 9 parts of a mechanical seal, 10 parts of a shaft, 11 parts of a rotating wheel, 12 parts of an impeller nut, 13 parts of a water guide cone, 14 parts of a sand filtering component, 15 parts of an oil nozzle, 16 parts of a seal seat, 101 parts of guide vane blades, 102 parts of a bearing seat, 103 parts of a front baffle, 141 parts of a sand filtering cover, 142 parts of a centrifugal impeller, 401 parts of a centrifugal impeller fixing frame, 501 parts of pre-rotation preventing blades, 502 parts of an inclined plane gap, 1a flow channel and.
Detailed Description
The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.
Fig. 1 to 4 are schematic diagrams of a cantilever type full tubular pump with an impeller and related structures, which mainly comprise a guide vane 1, a motor casing 2, a motor stator 3, a motor rotor 4, a water inlet bell pipe 5, a water discharge cone 6, a bearing I7, a bearing II8, a shaft 10, a runner 11 and a nozzle tip 15, and are characterized in that: the rotating wheel 11 is fixedly arranged inside the motor rotor 4, and the rotating wheel 11 is fixed on the shaft 10; the guide vane 1 is arranged in the water outlet side direction of the rotating wheel 11, and the guide vane 1 further comprises guide vane blades 101 and a bearing seat 102; the shaft 10 is held and supported by bearing I7 and bearing II8, bearing I7 and bearing II8 being mounted within the cavity of the bearing housing 102.
The rotating wheel 11 is fixed with the shaft 10 through an impeller nut 12, and a gap is reserved between the rotating wheel 11 and the bearing seat 102; the end of the runner 11 far away from the bearing seat 102 is provided with a water guide cone 13. A water drainage cone 6 is further installed at a position, close to an outlet of the device, of the bearing seat 102, and a sealing seat 16 is fixedly installed at one end, close to the rotating wheel 11, of the bearing seat 102; the seal seat 16 and the drainage cone 6 limit the axial displacement of the bearing I7 and the bearing II8 together; the guide vane 1 is arranged at one end of the motor shell 2, the other end of the motor shell 2 is connected with a water inlet horn tube 5, and the motor stator 3 is fixed inside the motor shell 2; the guide vane 1 and the water inlet flared tube 5 are connected with adjacent pipelines in a flange connection or quick joint connection mode; the inner wall surface of the water inlet flared tube 5 is provided with a pre-rotation preventing blade 501, and a gap is reserved between the pre-rotation preventing blade 501 and the outer wall of the water guide cone 12.
The motor stator 3 and the motor rotor 4 are permanent magnet motors or asynchronous motors.
The oil nozzle 15 is arranged on the water release cone 6, so that oil can be conveniently added into a cavity formed by the water release cone 6, the bearing seat 102, the sealing seat 16 and the mechanical seal 9.
A conical surface is processed at one end of the water inlet flared tube 5 close to the rotating wheel 11, and a conical surface is processed at the position of the inner side of the motor rotor 4 close to the water inlet flared tube 5; the gap between the two conical surfaces is a conical surface gap 502; the outflow port of the conical surface gap 502 points to the runner 11, and when a medium in the device flows from the water outlet to the water inlet of the runner 11 through the gap between the motor stator 3 and the motor rotor 4, the inclined surface gap 502 can provide impact flow pressurization for the inlet edge of the runner 11, so that the cavitation resistance is improved. The inner hole of the bearing seat 102 adopts a through hole with the same diameter, the turning of the whole part can be completed through one-time clamping in the processing process of the guide vane 1, namely, one-time cutting, and the verticality of the inner hole of the bearing seat 102 and the plane of the guide vane 1 contacting with the motor shell 2 is improved. The inner wall surface of the motor shell 2 and the plane of the motor shell 2 contacting the guide vane 1 are machined in one step, and the verticality of the inner wall surface of the motor shell 2 and the plane of the motor shell 2 contacting the guide vane 1 is improved. After the rotating wheel 11 is fixedly connected with the motor rotor 4, the inner hole of the rotating wheel 11 and the outer edge of the motor rotor 4 are machined one step, and the concentricity of the inner hole of the rotating wheel 11 and the outer edge of the motor rotor 4 is improved.
A sand filtering component 14 is arranged in a cavity formed by the guide vane 1, the motor shell 2, the motor stator 3 and the motor rotor 4; the sand filtering assembly 14 comprises a front baffle 103, a centrifugal impeller fixing frame 401, a sand filtering cover 141 and a centrifugal impeller 142; the front baffle 103 is processed on the outer wall surface of the guide vane 1 close to the motor rotor 4, and a gap is reserved between the outer edge of the front baffle 103 and the inner wall surface of the sand filtering cover 141. The sand filtering cover 141 is fixed on one side of the guide vane 1 close to the motor shell 2, a central hole is processed on one side of the sand filtering cover 141 close to the motor rotor 4, the centrifugal impeller fixing frame 401 penetrates through the central hole and a gap is reserved between the centrifugal impeller fixing frame 401 and the front baffle 103, and the other end of the centrifugal impeller fixing frame 401 is fixed on one side of the motor rotor 4 close to a water outlet end; the centrifugal impeller mount 401 and the motor rotor 4 may be integral; the centrifugal impeller 142 is fixed on a centrifugal impeller fixing frame 401, and blades of the centrifugal impeller 142 are positioned between the front baffle 103 and the sand filtering cover 141; when the motor rotor 4 rotates, the centrifugal impeller 142 is driven by the centrifugal impeller fixing frame 401 to rotate, so as to generate centrifugal force, and clean water in the medium flowing through the sand filtering assembly 14 is separated from impurities; a runner 1a is processed on the guide vane 1, a sand settling cavity 141a is processed at a position of the sand filtering cover 141 close to the outer edge of the centrifugal impeller 142, and the runner 1a is connected with the sand settling cavity 141a and the outside and used for discharging impurities deposited under the centrifugal action of the centrifugal impeller 142.
Fig. 2 is a schematic view of another structure of an impeller cantilever type full-through flow pump of the present invention, and the structure shown in fig. 2 is different from the structure shown in fig. 1 in that a guide vane 1 and a water inlet bell pipe 5 in fig. 1 are both in a flange connection manner, and a guide vane 1 and a water inlet bell pipe 5 in fig. 2 are both in a quick coupling connection manner.
The installation mode is as follows:
because the inner hole of the bearing seat 102 adopts a uniform diameter, the guide vane 1 can be cut off once in the machining process, and the concentricity required when other parts are installed is further ensured. The tool is used for machining the guide vane 1, so that the contact surface of the guide vane 1 and the motor shell 2 and the inner hole of the bearing seat 102 can be machined only by clamping the guide vane once through the chuck, the concentricity of the machined surface is improved, and a foundation is provided for later assembly.
Firstly, the installation of a rotor: the fixed runner 11 and the motor rotor 4 are sequentially inserted into the sand filter 141 and the centrifugal impeller 142 at one end where the centrifugal impeller fixing frame 401 is formed, and the centrifugal impeller 142 and the centrifugal impeller fixing frame 401 are fixed by a fastening member. A stud is arranged at one end of the sand filtering cover 141 far away from the motor rotor 4, and provides positioning for the next installation of the guide vane 1.
The bearing II8 is installed on the shaft 10, and a shaft shoulder is machined on the shaft 10 for positioning, so that the axial displacement of the inner rings of the bearing I7 and the bearing II8 is limited. After the bearing I7 and the bearing II8 are installed on the shaft 10, the bearing I7 and the bearing II8 are installed in the middle hole of the bearing seat 102, and are positioned with the seal seat 16 through the drain cones 6 installed at the two ends of the bearing I7 and the bearing II 8. A mechanical seal 9 is mounted between the seal holder 16 and the shaft 4 near the inlet. The runner 11 passes through the shaft 4, and the circumferential displacement of the runner 11 on the shaft 4 is restrained by a key. Meanwhile, after a gasket is arranged between the sand filtering cover 141 and the guide vane 1, a stud arranged on the sand filtering cover 141 penetrates through a through hole processed on the guide vane 1, a nut is arranged on the stud extending out of the guide vane 1, and a water guide cone 13 is fixedly arranged at one end, far away from the bearing seat 102, of the rotating wheel 11.
The motor stator 3 is installed inside the motor housing 2, and the motor stator 3 is fixed to the motor housing 2 by a positioning structure. And putting the motor stator 3 in the axial direction of the motor rotor 4, wherein one end of the motor stator is fixedly connected with the guide vane 1, and the other end of the motor stator is connected with the water inlet flared tube 5, thus finishing the installation.
The working principle is as follows:
when the motor runs, the rotor 4 of the motor directly drives the rotating wheel 11 connected with the rotor to rotate, the rotating wheel 1 is fixed on the shaft 4, and one end of the shaft is fixed in the cavities of the bearing seat 102 and the water drainage cone 6 through the bearing I7 and the bearing II 8. The bearing I7 and the bearing II8 are used for restraining the axial displacement and the radial displacement of the rotor and ensuring the normal operation of the device. The fluid medium is driven by the rotation of the runner 11 to flow through the water inlet bell-mouthed pipe 5, the runner 11 and the guide vane 1 in sequence. In the running process of the unit, after the oil nozzle 15 can be directly opened, oil can be added into a cavity formed by the drain cone 6, the bearing seat 102, the sealing seat 16 and the mechanical seal 9 through the oil path 103.
In order to prevent fine sand from entering the gap between the stator and the rotor of the motor and ensure the operation stability of the unit, a sand filtering component 14 is arranged in a cavity formed by the guide vane 1, the motor shell 2, the motor stator 3 and the motor rotor 4. The centrifugal impeller 142 is fixed to the centrifugal impeller fixing frame 401, and when the motor rotor 4 rotates, the centrifugal impeller 142 starts to rotate. Under the centrifugal action, the fine sand in the fluid medium flowing through the centrifugal impeller 142 is thrown to the outside of the centrifugal impeller 142 and is discharged through the flow passage 1a provided in the guide vane 1, and at the same time, under the action of the upstream and downstream pressure difference of the runner 11, the clean water flows out from the gap between the sand filter 141 and the centrifugal impeller fixing frame 401, and then passes through the air gap between the motor stator and the motor rotor 4 and the bevel gap 502 in sequence, as shown in fig. 3. Because the outflow port of the bevel clearance 502 points to the runner 11, the medium flowing out of the bevel clearance 502 provides impact flow pressurization for the inlet edge of the runner 11, so that the cavitation resistance is improved, the rotating speed is improved, and the weight of the whole device is reduced.
The protection scope of the present invention is not limited to the above embodiments, for example, the bearing seat 102 is disposed in the middle of the water inlet bell pipe 5, the bearing I7 and the bearing II8 are installed in the bearing seat 102, and the bearing seat 102 disposed on the original guide vane 1 is eliminated. Other embodiments and variations within the scope of the inventive concept are also encompassed.
Claims (10)
1. The utility model provides an impeller cantilever type full tubular pump mainly includes stator (1), motor casing (2), motor stator (3), motor rotor (4), inlet bell-mouthed tube (5), sluicing awl (6), bearing I (7), bearing II (8), axle (10), runner (11) and glib talker (15), its characterized in that: the rotating wheel (11) is fixedly arranged in the motor rotor (4), and the rotating wheel (11) is fixed on the shaft (10); the guide vane (1) is arranged in the water outlet side direction of the rotating wheel (11), and the guide vane (1) further comprises a guide vane blade (101) and a bearing seat (102); the shaft (10) is fixed and supported by a bearing I (7) and a bearing II (8), and the bearing I (7) and the bearing II (8) are arranged in a cavity of the bearing seat (102).
2. The impeller cantilever type full tubular pump according to claim 1, wherein the rotating wheel (11) is fixed with the shaft (10) through an impeller nut (12), and a gap is left between the rotating wheel (11) and the bearing seat (102); and a water guide cone (13) is arranged at one end of the rotating wheel (11) far away from the bearing seat (102). A drainage cone (6) is further installed at the position, close to the outlet of the device, of the bearing seat (102), and a sealing seat (16) is fixedly installed at one end, close to the rotating wheel (11), of the bearing seat (102); the sealing seat (16) and the drainage cone (6) limit the axial displacement of the bearing I (7) and the bearing II (8) together; the guide vane (1) is installed at one end of the motor shell (2), the other end of the motor shell (2) is connected with the water inlet flared tube (5), and the motor stator (3) is fixed inside the motor shell (2); the guide vanes (1) and the water inlet flared tubes (5) are connected with adjacent pipelines in a flange connection or quick joint connection mode; the water inlet bell-mouthed pipe is characterized in that an anti-prerotation blade (501) is mounted on the inner wall surface of the water inlet bell-mouthed pipe (5), and a gap is reserved between the anti-prerotation blade (501) and the outer wall of the water guide cone (12).
3. Impeller cantilevered full through-flow pump according to claim 1, characterized in that the motor stator (3), the motor rotor (4) is a permanent magnet motor or an asynchronous motor.
4. The impeller cantilever type full-through pump of any one of claim 2, wherein the wash-out cone (6) is provided with a nozzle tip (15) for conveniently adding oil into a cavity formed by the wash-out cone (6), the bearing seat (102), the sealing seat (16) and the mechanical seal (9).
5. The impeller cantilever type full tubular pump according to claim 2, wherein a conical surface is processed at one end of the water inlet flared tube (5) close to the rotating wheel (11), and a conical surface is processed at a position close to the water inlet flared tube (5) inside the motor rotor (4); the gap between the two conical surfaces is a conical surface gap (502); the outflow port of the conical surface gap (502) points to the rotating wheel (11), and when a medium in the device flows from the water outlet to the water inlet of the rotating wheel (11) through the gap between the motor stator (3) and the motor rotor (4), the inclined surface gap (502) can provide impact flow pressurization for the inlet edge of the rotating wheel (11), so that the cavitation resistance is improved.
6. The impeller cantilever type full tubular pump according to claim 2, wherein the inner hole of the bearing seat (102) adopts a through hole with the same diameter, the turning of the whole part (also can be called one-off) can be completed by clamping once in the processing process of the guide vane (1), and the verticality of the inner hole of the bearing seat (102) and the plane of the guide vane (1) contacting the motor casing (2) is improved.
7. The impeller cantilever type full through-flow pump according to claim 6, wherein the inner wall surface of the motor casing (2) and the plane of the contact guide vane (1) of the motor casing (2) are machined in a cutting way, so that the verticality of the inner wall surface of the motor casing (2) and the plane of the contact guide vane (1) of the motor casing (2) is improved.
8. The impeller cantilever type full-through flow pump of claim 7, wherein after the rotating wheel (11) is fixedly connected with the motor rotor (4), the inner hole of the rotating wheel (11) and the outer edge of the motor rotor (4) are machined one step, so that the concentricity of the inner hole of the rotating wheel (11) and the outer edge of the motor rotor (4) is improved.
9. The impeller cantilever type full-through flow pump according to claim 1, wherein a sand filtering component (14) is arranged in a cavity formed by the guide vane (1), the motor shell (2), the motor stator (3) and the motor rotor (4); the sand filtering assembly (14) comprises a front baffle (103), a centrifugal impeller fixing frame (401), a sand filtering cover (141) and a centrifugal impeller (142); the front baffle (103) is processed on the outer wall surface of the guide vane (1) close to the motor rotor (4), and a gap is reserved between the outer edge of the front baffle (103) and the inner wall surface of the sand filtering cover (141).
10. The impeller cantilever type full through-flow pump according to claim 9, wherein the sand filter (141) is fixed on one side of the guide vane (1) close to the motor casing (2), a central hole is processed on one side of the sand filter (141) close to the motor rotor (4), the centrifugal impeller fixing frame (401) passes through the central hole and has a gap with the front baffle (103), and the other end of the centrifugal impeller fixing frame (401) is fixed on one side of the motor rotor (4) close to the water outlet end; the centrifugal impeller fixing frame (401) and the motor rotor (4) can be integrated; the centrifugal impeller (142) is fixed on a centrifugal impeller fixing frame (401), and blades of the centrifugal impeller (142) are positioned between the front baffle (103) and the sand filtering cover (141); when the motor rotor (4) rotates, the centrifugal impeller (142) can be driven by the centrifugal impeller fixing frame (401) to rotate, centrifugal force is generated, and clean water in a medium flowing through the sand filtering assembly (14) is separated from impurities; a runner (1a) is machined on the guide vane (1), a sand settling cavity (141a) is machined at a position, close to the outer edge of the centrifugal impeller (142), of the sand filtering cover (141), and the runner (1a) is connected with the sand settling cavity (141a) and the outside and used for discharging impurities deposited under the centrifugal action of the centrifugal impeller (142).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011214173.5A CN112253485A (en) | 2020-11-04 | 2020-11-04 | Impeller cantilever type full-through-flow pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011214173.5A CN112253485A (en) | 2020-11-04 | 2020-11-04 | Impeller cantilever type full-through-flow pump |
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| Publication Number | Publication Date |
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| CN112253485A true CN112253485A (en) | 2021-01-22 |
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| CN202011214173.5A Pending CN112253485A (en) | 2020-11-04 | 2020-11-04 | Impeller cantilever type full-through-flow pump |
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| CN113623266A (en) * | 2021-09-27 | 2021-11-09 | 合肥恒大江海泵业股份有限公司 | Submerged motor pump with adjustable blade |
| CN113685361A (en) * | 2021-09-18 | 2021-11-23 | 合肥凯泉电机电泵有限公司 | Submersible wet type full tubular pump without shaft structure |
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