CN117411244B - Sectional multi-stage cooling water-filled permanent magnet submersible motor - Google Patents
Sectional multi-stage cooling water-filled permanent magnet submersible motor Download PDFInfo
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- CN117411244B CN117411244B CN202311713578.7A CN202311713578A CN117411244B CN 117411244 B CN117411244 B CN 117411244B CN 202311713578 A CN202311713578 A CN 202311713578A CN 117411244 B CN117411244 B CN 117411244B
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- 239000000498 cooling water Substances 0.000 title claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 59
- 238000004804 winding Methods 0.000 claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 230000005389 magnetism Effects 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 9
- 239000004677 Nylon Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 230000017525 heat dissipation Effects 0.000 abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 230000006698 induction Effects 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 230000005284 excitation Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
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- 239000002131 composite material Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
- H02K9/193—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil with provision for replenishing the cooling medium; with means for preventing leakage of the cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/48—Fastening of windings on the stator or rotor structure in slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
A water-filled permanent magnet submersible motor with sectional multi-stage cooling belongs to the technical field of submersible motors. The invention comprises a stator assembly and a rotor assembly, and is characterized in that the rotor assembly penetrates into an axial hole of the stator assembly, a plurality of bearings are connected between the rotor assembly and the stator assembly, a coil groove is formed in a stator core of the stator assembly and embedded with a stator winding, a casing is embedded outside the stator core and provided with a multistage cooler at intervals, the stator core comprises an upper stator core and a lower stator core, the casing comprises an upper casing and a lower casing, the upper casing is embedded outside the upper stator core, the lower casing is embedded outside the lower stator core, and the multistage cooler comprises an upper cooler, a middle cooler, a lower cooler and a tail cooler. The invention can solve the problem that the submersible motor in the prior art cannot realize stable and safe operation due to poor heat dissipation effect.
Description
Technical Field
The invention belongs to the technical field of submersible motors, and particularly relates to a water-filled permanent magnet submersible motor with segmented multistage cooling.
Background
The submersible motor is a submersible motor, which can pump underground water in a well or water in rivers, lakes and seas after being connected with a submersible pump, and is widely applied to farmland irrigation, urban water supply, urban and rural resident water, industrial and mining enterprise drainage, urban and rural construction drainage, urban or factory sewage and dirt treatment and the like.
The submersible motor is mainly divided into induction type and permanent magnet type according to the working principle, the industry is mainly induction type, the largest difference is that an induction type rotor magnetic field is generated by current induced in a stator magnetic field by a rotor conductor, and the permanent magnet type rotor magnetic field is generated by a permanent magnet in a rotor, and the permanent magnet type submersible motor is superior to the induction type in efficiency, power factor and power density. Under the background of increasingly outstanding energy and environmental problems at present, the permanent magnet type energy-saving and environment-friendly device has great advantages.
The submersible motor is divided into a dry type, a water filling type, an oil filling type and a shielding type according to the structure type, and the inner cavity of the water filling type submersible motor is filled with clean water, so that the heat dissipation capacity of the submersible motor can be effectively improved. However, the ordinary water-filled submersible motor is free from flowing, local overhigh temperature phenomenon is easy to occur, partial water-filled submersible motor can enable internal water to flow, and the temperature of the motor can be reduced to a certain extent, but for the existing water-filled submersible motor, the existing water-filled submersible motor is usually slender due to the limitation of the appearance, at the moment, the cooling capacity of the internal water is gradually reduced due to overlong heating section when the internal water flows, the cooling effect is affected, and the running of the submersible motor is unstable and unsafe.
Disclosure of Invention
Aiming at the problems, the invention overcomes the defects of the prior art and provides a sectional multi-stage cooling water-filled permanent magnet submersible motor; the invention can solve the problem that the submersible motor in the prior art cannot realize stable and safe operation due to poor heat dissipation effect.
In order to achieve the above purpose, the present invention adopts the following technical scheme.
The invention provides a water-filled permanent magnet submersible motor with sectional multistage cooling, which comprises a stator assembly and a rotor assembly, wherein the rotor assembly penetrates into an axial hole of the stator assembly, a plurality of bearings are connected between the rotor assembly and the stator assembly, a coil groove is arranged on a stator core of the stator assembly and embedded with a stator winding, a casing is nested outside the stator core and is provided with multistage coolers at intervals, the stator core comprises an upper stator core and a lower stator core, the casing comprises an upper casing and a lower casing, the upper casing is nested outside the upper stator core, the lower casing is nested outside the lower stator core, the multistage coolers comprise an upper cooler, a middle cooler, a lower cooler and a tail cooler, the end part of the upper cooler corresponds to the end part of the upper stator core and is connected with the upper casing, the middle cooler is positioned between the upper stator core and the lower stator core, the middle cooler is connected with the upper shell and the lower shell, the end part of the lower cooler corresponds to the end part of the lower stator core and is connected with the lower shell, the tail cooler is connected with the end part of the lower cooler, cooling water channels which are mutually communicated are commonly arranged in the multistage cooler and on the stator core, the two ends of the cooling water channels are communicated with a gap between the stator assembly and the rotor assembly, a cable which is connected with the stator winding penetrates out from the end part of the upper cooler, the tail part of the tail cooler is provided with a bottom component, the rotor core of the rotor assembly is sleeved on a rotating shaft of the rotor assembly, a permanent magnet is embedded in the rotor core, the tail part of the rotating shaft is provided with an internal pump wheel.
Further, the bearing comprises an upper guide bearing, a lower guide bearing and a thrust bearing, the upper guide bearing comprises an upper guide bearing outer ring and an upper guide bearing inner ring, the lower guide bearing comprises a lower guide bearing outer ring and a lower guide bearing inner ring, the thrust bearing comprises a thrust bearing fixing part and a thrust bearing carrying part, the upper guide bearing outer ring, the lower guide bearing outer ring and the thrust bearing fixing part are connected in the multistage cooler, and the upper guide bearing inner ring, the lower guide bearing inner ring and the thrust bearing carrying part are connected on the rotating shaft.
Still further, the upper guide bearing outer ring is disposed on the upper cooler, the lower guide bearing outer ring is disposed on the lower cooler, and the thrust bearing fixing portion is disposed on the tail cooler.
Further, the bottom assembly comprises a pressure regulating bag and a base, wherein the pressure regulating bag is of a bowl-shaped structure made of rubber, the pressure regulating bag is arranged in a hole formed in the bottom of the base, the base is connected with the tail cooler, the inside of the pressure regulating bag is inside a motor, and the outside of the pressure regulating bag is outside the motor.
Further, the stator assembly further comprises a magnetism isolating block, the magnetism isolating block is made of high-strength nylon materials, the magnetism isolating block is arranged between the middle cooler and the lower stator core, and a coil groove for embedding the stator winding is also formed in the magnetism isolating block.
Further, a water filling port capable of being blocked is arranged on the upper cooler, a water outlet capable of being blocked is arranged on the tail cooler, and the water filling port and the water outlet are communicated with the cooling water flow channel.
Further, the rotor core is fixed on the rotating shaft through balance rings arranged at two ends of the rotor core, and the permanent magnets are embedded into the rotor core in a segmented mode along the axial direction of the rotor core.
Further, each section of permanent magnet is alternately arranged with N-S poles in the circumferential direction.
Still further, dynamic balance of the rotor assembly is ensured by punching holes in the balancing ring, and the residual unbalance is less than 6.3mm/s.
Further, the surfaces of the stator iron core and the rotor iron core are coated with antirust paint for protection, and the surfaces of the permanent magnets are plated with nickel for protection.
The invention has the beneficial effects of.
1. The rotor assembly is embedded with permanent magnet excitation, does not need induction excitation or external power excitation, reduces reactive power and rotor loss, and improves the power factor and efficiency of the motor.
2, the rotor assembly is internally provided with the internal pump wheel to drive internal water to circularly flow, and the multistage cooler is used for carrying out stage heat dissipation, so that a better heat dissipation and cooling effect is maintained, the phenomena of loss increase, permanent magnet demagnetization and even burnout when the temperature of the motor is too high are avoided, and the stable and safe operation of the motor is ensured.
Drawings
In order to make the technical problems, technical schemes and beneficial effects solved by the invention more clear, the invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description is presented by way of example only and is not intended to limit the invention.
Fig. 1 is a schematic view of the overall external structure of the present invention.
Fig. 2 is a schematic structural view of the stator assembly of the present invention.
FIG. 3 is a schematic structural view of the rotor assembly of the present invention.
FIG. 4 is a schematic view of section A-A of FIG. 1 in accordance with the present invention.
Fig. 5 is a schematic view of the section B-B of fig. 1 according to the present invention.
Fig. 6 is a schematic cross-sectional view of the present invention when running the flow of internal cooling water.
The marks in the figure: the cooling device comprises a cable 1, an upper cooler 2, an upper guide bearing outer ring 3, a stator winding 4, an upper stator core 5, an upper casing 6, a middle cooler 7, a magnetism isolating block 8, a lower stator core 9, a lower casing 10, a lower guide bearing outer ring 11, a lower cooler 12, a push bearing fixing part 13, a tail cooler 14, a pressure regulating bag 15, a base 16, a rotating shaft 17, an upper guide bearing inner ring 18, a balance ring 19, a rotor core 20, a lower guide bearing inner ring 21, a push bearing moving part 22, an inner pump wheel 23, a permanent magnet 24, a water filling port 25, a water outlet 26 and a cooling water flow passage 27.
Detailed Description
Referring to fig. 1-6, the present embodiment provides a water-filled permanent magnet submersible motor with sectional multi-stage cooling, which includes a stator assembly and a rotor assembly, wherein the rotor assembly penetrates into an axial hole of the stator assembly, a plurality of bearings are connected between the rotor assembly and the stator assembly, and each bearing includes an upper guide bearing, a lower guide bearing and a thrust bearing. The upper guide bearing comprises an upper guide bearing outer ring 3 and an upper guide bearing inner ring 18, the lower guide bearing comprises a lower guide bearing outer ring 11 and a lower guide bearing inner ring 21, the thrust bearing comprises a thrust bearing fixing part 13 and a thrust bearing carrying part 22, and all the bearings are installed in a split type.
Wherein the upper guide bearing inner ring 18 and the lower guide bearing inner ring 21 are made of 3Cr13 material and are arranged in the rotor assembly, the upper guide bearing outer ring 3 and the lower guide bearing outer ring 11 are made of asbestos iron material and are arranged in the stator assembly, and a spiral water channel is arranged between the inner ring and the outer ring; the thrust bearing carrier part is made of disc-shaped high-strength composite materials and is arranged in the rotor assembly, and the thrust bearing fixing part is formed by combining a plurality of high-strength alloy sector blocks into a disc shape and is arranged in the stator assembly. The sector blocks can swing in a certain range during working, and the functions of automatic centering and balancing are achieved. (the thrust bearing is a common component of conventional construction in the art and is described herein only as a complement).
Referring to fig. 2 and fig. 4 to 6, the stator core of the stator assembly includes an upper stator core 5 and a lower stator core 9, and the upper stator core 5 and the lower stator core 9 are laminated by silicon steel sheets. The upper stator core 5 and the lower stator core 9 are provided with coil slots and are embedded with stator windings 4.
The stator core is externally nested with a casing and is provided with a multistage cooler at intervals, and the upper guide bearing outer ring 3, the lower guide bearing outer ring 11 and the thrust bearing fixing part 13 are connected in the multistage cooler.
The casing includes an upper casing 6 and a lower casing 10, the upper casing 6 is nested outside the upper stator core 5, and the lower casing 10 is nested outside the lower stator core 9.
The multistage cooler comprises an upper cooler 2, a middle cooler 7, a lower cooler 12 and a tail cooler 14, wherein the end part of the upper cooler 2 corresponds to the end part of the upper stator core 5 and is connected with the upper shell 6, the middle cooler 7 is positioned between the upper stator core 5 and the lower stator core 9, the middle cooler 7 is connected with the upper shell 6 and the lower shell 10, the end part of the lower cooler 12 corresponds to the end part of the lower stator core 9 and is connected with the lower shell 10, and the tail cooler 14 is connected with the end part of the lower cooler 12.
The cable 1 connected with the stator winding 4 penetrates out from the end part of the upper cooler 2, and a cooling water flow passage 27 which is mutually communicated is arranged in the multistage cooler and on the stator iron core together and is used for cooling water circulation in the motor, and the two ends of the cooling water flow passage 27 are communicated with gaps between the stator assembly and the rotor assembly integrally so as to realize cooling water circulation flow in the motor.
The stator assembly further comprises a magnetism isolating block 8, wherein the magnetism isolating block 8 is made of a non-magnetic conductive and non-conductive high-strength nylon material, the magnetism isolating block 8 is arranged between the middle cooler 7 and the lower stator core 9, and a coil groove for embedding the stator winding 4 is also formed in the magnetism isolating block 8.
The upper cooler 2 is provided with a water injection port 25 which can be blocked, the tail cooler 14 is provided with a water outlet 26 which can be blocked, the water injection port 25 and the water outlet 26 are communicated with a cooling water flow passage 27, the water injection port 25 is used for water injection operation in the final stage of motor assembly, so that water is filled in the motor, and motor assembly is completed. The water outlet 26 is used for the water discharge operation during test or maintenance for further measurement or disassembly (since the motor is normally placed upright, the water filling port 25 is on top, the water outlet 26 is on the bottom, the water outlet 26 below is convenient for discharging water).
In operation, circulating cooling water flows in from the upper cooler 2, passes through the middle cooler 7 and flows out from the lower cooler 12 and the tail cooler 14. The cooling water radiates heat through the cooling pipes of the multistage cooler, the cooling pipes are uniformly distributed on the circumference of the outermost ring of the multistage cooler and are not contacted with the heating motor, and the cooling water radiates heat through conduction with an external water source.
Wherein the upper cooler 2 takes the function of an upper guide bearing seat into consideration, the lower cooler 12 takes the function of a lower guide bearing seat into consideration, the tail cooler 14 takes the function of a thrust bearing seat into consideration, the upper guide bearing outer ring 3 is arranged on the upper cooler 2, the lower guide bearing outer ring 11 is arranged on the lower cooler 12, and the thrust bearing fixing part 13 is arranged on the tail cooler 14.
The bottom subassembly is connected at afterbody cooler 14 tip, and the bottom subassembly includes pressure regulating bag 15 and base 16, and pressure regulating bag 15 is the bowl shape structure of rubber material, sets up in the inside of base 16, and base 16 is connected with afterbody cooler 14, and the inside of pressure regulating bag 15 is inside the motor, and the outside of pressure regulating bag 15 is outside the motor. When the volume of the water in the motor changes due to expansion and contraction, the pressure regulating bag 15 deforms, so that the pressure difference between the water inside and outside the motor is always kept to be zero.
Referring to fig. 3 to 6, after the rotor core 20 of the rotor assembly is punched and sheared by a silicon steel sheet, a balance ring 19 arranged at two ends of the rotor core is fixedly sleeved on a rotating shaft 17 of the rotor assembly, the rotating shaft 17 is made of 3Cr13 material, a permanent magnet 24 is embedded in the rotor core 20, a small water friction loss can be ensured by an embedded installation mode, smoothness of an air gap flow passage is ensured, and the permanent magnet 24 is made of rare earth material neodymium iron boron.
The permanent magnets 24 are embedded in the rotor core 20 in a segmented manner along the axial direction of the rotor core 20, so that the processing of the permanent magnets 24 is facilitated, and the problem that the whole processing is difficult to process due to the overlong length is avoided. Each of the permanent magnets 24 is alternately arranged with circumferential N-S poles. Dynamic balance of the rotor assembly is ensured by punching holes in the balancing ring 19, and the residual unbalance is less than 6.3mm/s.
The upper guide bearing inner ring 18, the lower guide bearing inner ring 21 and the thrust bearing carrier 22 are connected to a bearing rail of the rotating shaft 17.
The tail of the rotating shaft 17 is provided with an inner pump wheel 23, and cooling water inside the motor is driven to flow through the inner pump wheel 23.
Since all the components are immersed in water, the surfaces of the stator core and the rotor core 20 are coated with anti-rust paint for protection, and the surfaces of the permanent magnets 24 are plated with nickel for protection.
In general, the stator assembly converts electric energy into magnetic field energy storage through a magnetic conductive stator core and a stator winding 4, and dissipates heat through a multistage cooler and a machine shell; the rotor assembly converts the magnetic field energy storage into mechanical energy through the permanent magnet 24 and the magnetic-conductive rotor core 20, drives the rotating shaft 17 to rotate, drives a pump impeller outside a motor connected with the rotating shaft 17 to pump water and drain water, and simultaneously carries out stage cooling on cooling water through a multistage cooler group in the stator assembly through an internal pump impeller 23 arranged at the tail part of the rotating shaft 17.
As shown in fig. 4 to 6, when the motor is operated, the internal cooling water is driven by the internal pump impeller 23, and after flowing out from the bottom cooler, the cooling water passes through the gap between the thrust bearing driving part 22 and the thrust bearing fixing part 13, and is applied with centrifugal force by the internal pump impeller 23, flows through the air gap and the coil groove, cools the stator assembly and the rotor assembly, flows in from the upper cooler 2 and cools, then flows into the cooling water flow channel 27 of the stator core to cool the stator assembly, and finally cools the stator assembly for the second time through the middle cooler 7, and finally cools the stator assembly for the third time through the lower cooler 12 and the tail cooler 14.
The installation sequence of the invention is generally as follows: the stator assembly and the rotor assembly are firstly and respectively partially installed, and then the whole assembly is carried out.
The stator assembly is installed by the following steps: the stator winding 4 is embedded into coil grooves of the upper stator core 5, the lower stator core 9 and the magnetism isolating block 8 in a reciprocating threading mode, and the cable 1 is connected with the stator winding 4.
The rotor assembly is installed by the following steps: the rotor core 20 is overlapped in the rotating shaft 17, the permanent magnets 24 are axially embedded in the rotor core 20 in a segmented mode, N-S poles of the permanent magnets 24 are alternately distributed in the circumferential direction, two ends of the rotor core 20 are fixed through the balance ring 19, and finally the upper guide bearing inner ring 18 and the lower guide bearing inner ring 21 are sleeved on a bearing rail of the rotating shaft 17.
The final assembly steps are as follows: loading the upper guide bearing outer ring 3 and the lower guide bearing outer ring 11 into the upper cooler 2 and the lower cooler 12, respectively; connecting the upper cooler 2 with the upper housing 6 while the cable 1 is threaded out from the upper cooler 2; penetrating the rotor assembly into an axial hole in the middle of the stator assembly; the lower cooler 12 is connected with the lower shell 10, the rotating shaft 17 penetrates out of the hole of the lower cooler, the thrust bearing carrier part 22 is fixed with the rotating shaft 17, and an internal pump wheel 23 is arranged at the tail part of the rotating shaft 17 and is fixed through a nut; the thrust bearing fixing part 13 is provided with a flange hole which correspondingly penetrates into a cylinder of the tail cooler 14 to be fixed and is integrally arranged at the lower part of the stator assembly; finally, the pressure regulating bag 15 and the base 16 are fixed on the tail part of the stator assembly through bolts.
After the installation is completed, water is injected into the motor through the water injection hole, and the water filling quantity is checked. In order to ensure the running reliability, the inner cavity of the motor should be subjected to a pressure resistance test of 0.05MPa for 5min without penetration phenomenon.
It will be appreciated that the above detailed description of the invention is provided for illustration of the invention and not for limitation of the technical solutions described in the embodiments of the invention, and that the person skilled in the art should understand that the invention may be modified or substituted for the same technical effects; as long as the use requirement is met, the invention is within the protection scope of the invention.
Claims (9)
1. The water-filled permanent magnet submersible motor with the sectional multistage cooling comprises a stator assembly and a rotor assembly, and is characterized in that the rotor assembly penetrates into an axial hole of the stator assembly, a plurality of bearings are connected between the rotor assembly and the stator assembly, a coil groove is formed in a stator core of the stator assembly and a stator winding (4) is embedded in the stator core, a casing is embedded outside the stator core and is provided with a multistage cooler at intervals, the stator core comprises an upper stator core (5) and a lower stator core (9), the casing comprises an upper casing (6) and a lower casing (10), the upper casing (6) is embedded outside the upper stator core (5), the lower casing (10) is embedded outside the lower stator core (9), the multistage cooler comprises an upper cooler (2), a middle cooler (7), a lower cooler (12) and a tail cooler (14), the end part of the upper cooler (2) corresponds to the end part of the upper stator core (5) and is connected with the upper casing (6), the upper casing (6) is embedded outside the lower casing (6) and is connected with the lower casing (10) by the upper and lower casing (7) and the lower casing (9), the tail cooler (14) is connected to the end part of the lower cooler (12), a cooling water flow passage (27) which is mutually communicated is arranged in the multistage cooler and on the stator core, the two ends of the cooling water flow passage (27) are communicated with a gap between the stator assembly and the rotor assembly, a cable (1) which is connected with the stator winding (4) penetrates out of the end part of the upper cooler (2), the tail part of the tail cooler (14) is provided with a bottom component, the bottom component comprises a pressure regulating bag (15) and a base (16), the pressure regulating bag (15) is of a bowl-shaped structure made of rubber materials and is arranged in a hole formed in the bottom of the base (16), the base (16) is connected with the tail cooler (14), the inside of the pressure regulating bag (15) is the inside of a motor, the outside of the motor, a rotor (20) of the rotor assembly is sleeved on a rotating shaft (17) of the rotor assembly, and a permanent magnet (23) is embedded in the rotor (20), and the permanent magnet (23) is arranged in the rotor (20).
2. A segmented multistage cooled water filled permanent magnet submersible motor according to claim 1, characterized in that the bearings comprise an upper guide bearing comprising an upper guide bearing outer ring (3) and an upper guide bearing inner ring (18), a lower guide bearing comprising a lower guide bearing outer ring (11) and a lower guide bearing inner ring (21), and a thrust bearing comprising a thrust bearing fixing portion (13) and a thrust bearing carrier portion (22), the upper guide bearing outer ring (3), the lower guide bearing outer ring (11) and the thrust bearing fixing portion (13) being connected in the multistage cooler, the upper guide bearing inner ring (18), the lower guide bearing inner ring (21) and the thrust carrier portion (22) being connected on the rotating shaft (17).
3. A segmented multistage cooled water filled permanent magnet submersible motor according to claim 2, characterized in that the upper guide bearing outer ring (3) is arranged on the upper cooler (2), the lower guide bearing outer ring (11) is arranged on the lower cooler (12), and the thrust bearing fixing (13) is arranged on the tail cooler (14).
4. The water-filled permanent magnet submersible motor with segmented multistage cooling according to claim 1, wherein the stator assembly further comprises a magnetism isolating block (8), the magnetism isolating block (8) is made of high-strength nylon material, the magnetism isolating block (8) is arranged between the middle cooler (7) and the lower stator core (9), and coil grooves for embedding the stator windings (4) are also formed in the magnetism isolating block (8).
5. A segmented multistage cooling water filled permanent magnet submersible motor according to claim 1, characterized in that a water filling port (25) capable of being blocked is arranged on the upper cooler (2), a water outlet (26) capable of being blocked is arranged on the tail cooler (14), and the water filling port (25) and the water outlet (26) are communicated with the cooling water runner (27).
6. A segmented multistage cooled water filled permanent magnet submersible motor according to claim 1, characterized in that the rotor core (20) is fixed to the rotating shaft (17) by means of balancing rings (19) arranged at both ends thereof, the permanent magnets (24) being embedded in the rotor core (20) in segments axially along the rotor core (20).
7. A segmented, multi-stage cooled, water-filled permanent magnet submersible motor as recited in claim 6, wherein each segment of permanent magnets (24) is alternately arranged with circumferential N-S poles.
8. A segmented multistage cooled water filled permanent magnet submersible motor according to claim 7, characterized in that the dynamic balance of the rotor assembly is ensured by punching holes in the balancing ring (19), the remaining unbalance being less than 6.3mm/s.
9. The segmented multistage cooling water-filled permanent magnet submersible motor according to claim 1, wherein the surfaces of the stator core and the rotor core (20) are both coated with anti-rust paint for protection, and the surfaces of the permanent magnets (24) are nickel-plated for protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311713578.7A CN117411244B (en) | 2023-12-14 | 2023-12-14 | Sectional multi-stage cooling water-filled permanent magnet submersible motor |
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|---|---|---|---|
| CN202311713578.7A CN117411244B (en) | 2023-12-14 | 2023-12-14 | Sectional multi-stage cooling water-filled permanent magnet submersible motor |
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| CN117411244B true CN117411244B (en) | 2024-02-20 |
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| CN111769680A (en) * | 2020-06-24 | 2020-10-13 | 陈天为 | Radial magnetic circuit submersible linear motor |
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| CN113612348A (en) * | 2021-10-08 | 2021-11-05 | 东营市丰润通科技发展有限公司 | Submersible screw pump based on ultra-low speed multi-rotor permanent magnet submersible motor |
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| CN117040193A (en) * | 2023-08-14 | 2023-11-10 | 中国船舶集团有限公司第七〇四研究所 | High-power submersible permanent magnet motor cooled by multiple media |
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| CN113054816A (en) * | 2021-01-28 | 2021-06-29 | 天津大学 | Bearingless ultra-high-speed permanent magnet motor for vehicle fuel cell air compressor |
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|---|---|
| CN117411244A (en) | 2024-01-16 |
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