CN110462218A - Centrifugal pump assemblages and its assemble method with axial flux motor - Google Patents
Centrifugal pump assemblages and its assemble method with axial flux motor Download PDFInfo
- Publication number
- CN110462218A CN110462218A CN201880021409.8A CN201880021409A CN110462218A CN 110462218 A CN110462218 A CN 110462218A CN 201880021409 A CN201880021409 A CN 201880021409A CN 110462218 A CN110462218 A CN 110462218A
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- impeller
- rotor assembly
- assembly
- fluid
- stator module
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- 238000000034 method Methods 0.000 title claims description 27
- 230000004907 flux Effects 0.000 title description 8
- 239000012530 fluid Substances 0.000 claims abstract description 136
- 238000010276 construction Methods 0.000 claims abstract description 19
- 238000005086 pumping Methods 0.000 claims abstract description 7
- 238000012546 transfer Methods 0.000 claims abstract description 6
- 239000004020 conductor Substances 0.000 claims description 58
- 238000004891 communication Methods 0.000 claims description 2
- 230000005389 magnetism Effects 0.000 claims 1
- 238000001816 cooling Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000003321 amplification Effects 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 230000000930 thermomechanical effect Effects 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
Classifications
-
- 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
- F04D13/0666—Units comprising pumps and their driving means the pump being electrically driven the motor being of the plane gap type
-
- 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
- F04D29/041—Axial thrust balancing
-
- 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
-
- 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
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
Abstract
It is a kind of for by the electric motor assembly of fluid cavity including stator assembly and rotor assembly by fluid pumping, the stator module includes the multiple conductive coils for being configured to transfer thermal energy to the fluid in fluid cavity, the rotor assembly is positioned adjacent to stator module, to define therebetween axial gap.Stator module is configured to apply first axial force on rotor assembly.Electric motor assembly further includes impeller, and the impeller and stator module are relatively directly coupled to rotor assembly, so that rotor assembly and impeller construction are rotated at around an axis.Power is applied a second axial on impeller by the fluid that impeller guides.Rotor assembly and impeller construction are at being immersed in the fluid in fluid cavity.
Description
Cross reference to related applications
The U.S. Patent application No.15/418,146 submitted this application claims on January 27th, 2017 and on January 27th, 2017
The U.S. Patent application No.15/418 of submission, 103 priority, the entire disclosure are incorporated herein by reference in their entirety.
Technical field
The field of invention relates generally to centrifugal pump assemblages, relate more specifically to include the axial magnetic flux for being connected to impeller
The centrifugal pump assemblages of motor.
Background technique
At least some known centrifugal pumps include the impeller for directing flow through pump.Impeller is connected to axis, and the axis is also
It is connected to the rotor of motor, so that the rotation of rotor causes the rotation of impeller.In at least some known motor, rotor
It is opened with sub-interval, so that having axial attraction existing always between the steel core of magnet and stator on rotor.The axis
Can be sufficiently large to power, so that the bearing arrangement of motor needs special design to consider to bear the axial force.In addition, rotation
Kinetic energy is assigned in pumping fluid by impeller in its rotation, and which increase the pressure of fluid.Due to the pressure increase, produce
Act on the axial suction on impeller.In at least some known centrifugal pumps, axial suction may also need bearing arrangement
Design considers.
In addition, at least some known centrifugal pumps, which are located at may cause, is conducted through fluid therein in air pump inoperative
In the environment freezed.When fluid freeze, impeller can be locked into place, and then be carried out before defrosting to fluid
Rotary blade the trial reduced service life that may cause impeller or entirely pump.In addition, at least some centrifugal pumps, electricity
The stator of motivation generates relatively high heat and may need complicated and high-cost cooling system.
Summary of the invention
On the one hand, a kind of electric motor assembly is provided.The electric motor assembly includes stator assembly and rotor assembly this turn
Sub-component is positioned adjacent to stator module, to define therebetween axial gap.Stator module is configured to apply on rotor assembly
First axial force.Electric motor assembly further includes impeller, and the impeller and stator module are relatively directly coupled to rotor assembly, so that
Rotor assembly and impeller construction are rotated at around an axis.Power is applied a second axial on impeller by the fluid that impeller guides.
On the other hand, a kind of pump assembly is provided.The pump assembly includes pump case and the motor for being connected to pump case
Shell.The pump assembly further includes electric motor assembly, which includes stator assembly and rotor assembly rotor assembly positioning
At adjacent stator component, to define therebetween axial gap.Stator module is configured to apply first axial force on rotor assembly.
Electric motor assembly further includes impeller, and the impeller and stator module are relatively directly coupled to rotor assembly so that rotor assembly and
Impeller construction is rotated at around an axis.Power is applied a second axial on impeller by the fluid that impeller guides.
It yet still another aspect, providing a kind of method for assembling pump assembly.This method includes providing stator module and by rotor
Component is connected to stator module, so that defining therebetween axial gap.Stator module is configured to apply on rotor assembly
One axial force.This method further include impeller and stator module are relatively directly coupled to rotor assembly so that rotor assembly and
Impeller construction is rotated at around an axis.It is configured to apply a second axial power on impeller by the fluid that impeller guides.
On the one hand, a kind of electric motor assembly for fluid pumping to be passed through fluid cavity is provided.The electric motor assembly
Including stator module, which includes multiple conductive coils, and conductive coil is configured to transfer thermal energy in fluid cavity
Fluid.The electric motor assembly further includes rotor assembly, which is positioned adjacent to stator module, to define therebetween axial direction
Gap.Electric motor assembly further includes impeller, and the impeller and stator module are relatively directly coupled to rotor assembly, so that rotor set
Part and impeller construction are rotated at around an axis.Rotor assembly and impeller construction are at being immersed in the fluid in fluid cavity.
It yet still another aspect, providing a kind of pump assembly.The pump assembly includes limiting the pump case of fluid cavity and being connected to pump
The motor field frame of shell.The pump assembly further includes electric motor assembly, which includes stator module, the stator module
It is located in motor case body and including multiple conductive coils, conductive coil is configured to transfer thermal energy to the stream in fluid cavity
Body.Electric motor assembly further includes rotor assembly, and rotor assembly is positioned adjacent to stator module and is located in pump case.Motor unit
Part further includes impeller, and the impeller and stator module are relatively directly coupled to rotor assembly, so that rotor assembly and impeller construction
It is rotated at around an axis.Rotor assembly and impeller construction are at being immersed in the fluid in fluid cavity.
It yet still another aspect, providing a kind of method assembled for fluid pumping to be passed through the pump assembly of fluid cavity.The party
Method includes providing the stator module with multiple conductive coils, and the conductive coil is configured to transfer thermal energy in fluid cavity
Fluid.This method further includes that rotor assembly is positioned adjacent to stator module, so that define therebetween axial gap, and by leaf
Wheel is relatively directly coupled to rotor assembly with stator module, so that rotor assembly and impeller construction are rotated at around an axis.Turn
Sub-component and impeller construction are at being immersed in the fluid in fluid cavity.
Detailed description of the invention
Fig. 1 is the perspective view of exemplary centrifugal pump；
Fig. 2 is the sectional view of centrifugal pump shown in FIG. 1；
Fig. 3 is the amplification sectional view of centrifugal pump shown in Fig. 2, and it illustrates motor and impeller；
Fig. 4 is the perspective view of the alternative embodiment of centrifugal pump；
Fig. 5 is the bottom perspective view of centrifugal pump shown in Fig. 4, and it illustrates impellers；
Fig. 6 is the sectional view of centrifugal pump shown in Fig. 4, and it illustrates impellers and motor；And
Fig. 7 is the amplification sectional view for the part of motor and impeller surrounded by the frame 7-7 in Fig. 6.
Although the special characteristic of various embodiments may be shown in some drawings and have been not shown in other attached drawings,
But this is intended merely to conveniently.Any feature of any figure is cited and/or requires specially in combination with any feature of any another figure
Economic rights protection.
Specific embodiment
Fig. 1 is the perspective view of exemplary centrifugal pump assemblages 100.Fig. 2 is the sectional view of pump assembly 100, shows axial magnetic
Logical electric motor assembly 102, impeller 104 and pump case 106.Fig. 3 is the amplification sectional view of electric motor assembly 102 and impeller 104, is
For the sake of clear, pump case 106 is removed.In this exemplary embodiment, pump assembly 100 includes pump case 106 and motor case
Body 108.Pump case 106 surround electric motor assembly 102 at least part and impeller 104, and motor field frame 108 surround it is electronic
Thermomechanical components 102.Pump case 106 includes the vortex wall (scroll of a part of fluid inlet 110, restriction fluid flowing passage 114
Wall) 112 and fluid outlet 116.In operation, fluid flows through entry 110 and it is conducted through the channel of surrounding wall 112
114, until fluid leaves pump 100 through housing outlets 116.
In this exemplary embodiment, impeller 104 is located in pump case 106 and including limiting entrance opening 120
Entrance ring 118.Impeller 104 further includes backboard 122 and multiple blades 124 for being connected between entrance ring 118 and backboard 122.Such as
Further detailed herein, the backboard 122 of impeller 102 is directly coupled to electric motor assembly 102, so that electric motor assembly
102 are configured to rotate impeller 102 around rotation axis 126.In operation, motor 102 revolves impeller 104 around axis 126
Turn, in axial direction to be sucked fluid in pump case 106 by housing inlet port 110.Fluid is conducted through in entrance ring 118
Entrance opening 120 and turned to by the blade 124 in channel 114, to guide fluid radially across housing outlets along wall 112
116.As the speed of impeller 104 increases, increased by the Fluid Volume that pump assembly 100 moves, so that impeller 104 is generated from outlet
The high velocity fluid flow of 116 discharges.
When the impeller is rotated, impeller 104 assigns kinetic energy to pumping fluid, this makes fluid pressurize.In the exemplary implementation
In example, pressurized fluid applies axial suction 128 on impeller 104.Axial force 128 is acted on separate by pump case entrance 110
On the axial direction of electric motor assembly 102.When the speed of impeller 104 increases, the pressure of fluid and generated axial suction
128 also correspondingly increase.That is, rotation speed of the size of axial suction 128 based on impeller 104.
In this exemplary embodiment, electric motor assembly 102 includes motor field frame 108, which includes
First part 130 and second part 132.Electric motor assembly 102 further includes stator module 133, and the stator module 133 is fixed including magnetic
Sub- core 134 and multiple conductor coils 136.Electric motor assembly 102 further includes bearing assembly 138 and rotor assembly 140.Each conductor
Coil 136 includes opening (not shown), which is closely bonded the outer of one in (conform) multiple stator core teeth 142
Portion's shape, so that each stator tooth 142 is configured to be located in conductor coils 136.Electric machine assembly 102 can each stator tooth
142 include a conductor coils 136, or includes a conductor coils 136 every a tooth 142.Stator core 134 and coil
136 are located in the second part 132 of motor field frame 108, which is connected to pump using multiple fasteners 144
Shell 106.
In this exemplary embodiment, variable frequency drives (not shown) provides signal, such as pulse width to motor 102
Modulate (PWM) signal.In an alternative em bodiment, motor 102 may include controller (not shown), is connected to by wiring
Conductor coils 136.Controller is configured to once apply voltage to one or more conductor coils 136, so as to the sequence of pre-selection
(commutate) conductor coils 136 are converted, so that rotor assembly 140 is rotated around axis 126.
Rotor assembly 140 is located in pump case 106 close to channel 114, and including at least having first axis surface
148 back iron or rotor disk 146.Rotor assembly 140 further includes the magnet guarantor that rotor disk 146 is relatively connected to impeller 104
Holder 150 and multiple permanent magnets 152 that magnet holder 150 is connected to using adhesive.Appoint alternatively, magnet 152 can be used
What is connected to magnet holder 150 convenient for the keeping method of the operation of motor 102 as described herein.In another embodiment
In, magnet 152 is directly coupled to rotor disk 146.
In this exemplary embodiment, rotor assembly 140 is positioned adjacent to stator module 133, to define therebetween axial direction
Gap 154.As described above, voltage is sequentially applied to coil 136 to cause the rotation of rotor assembly 140.More specifically, coil
Magnetic flux between 136 control magnetic stator cores 134 and permanent magnet 152 flows.Magnet 152 is attracted to magnetic stator core 134, so that beginning
The axial magnetic 156 in gap 154 is existed across eventually.In this way, the stator core 134 of stator module 133 is in the axial direction far from impeller 104
Axial magnetic 156 is distributed into rotor assembly 140 on direction.More specifically, axial magnetic 156 acts on the axis with impeller 104
On the direction opposite to suction 128.As the size of axial gap 154 reduces, between stator module 133 and rotor assembly 140
Axial magnetic 156 increase.That is, length of the size of axial magnetic 156 based on axial gap 154.
Rotor disk 146 is connected to the rotary part 158 of bearing assembly 138, and stator module 133 is connected to bearing assembly
138 fixation member 160.In this exemplary embodiment, bearing assembly 138 include hydrodynamic bearing (hydrodynamic pressure bearing,
Hydrodynamic bearing), wherein rotary part 158 is connected to rotor disk 146 using multiple fasteners 162.Another
In a little embodiments, bearing assembly 138 includes any bearing type of the operation convenient for motor 102 as described herein.
As best seen in fig. 3, impeller 104 and stator module 130 are relatively directly coupled to rotor assembly 140, so that
Impeller 104 contacts rotor assembly 140, so that impeller 104 and rotor assembly 140 can be rotated around axis 126.As used herein,
Term " direct " is intended to description rotor assembly 140 and is connected to impeller 104, positions without any intermediate structure therebetween will turn
Sub-component 140 is separated with impeller 104.More specifically, rotor disk 146 is directly coupled to impeller 104.More specifically, rotor disk 146
It is directly coupled to the backboard 122 of impeller 104.In one embodiment, the axial surface 148 of rotor disk 146 is with aspectant pass
System is connected to and directly contacts the axial surface 164 of backboard 122.In this exemplary embodiment, and as shown in figure 3, rotor
Disk 146 is connected to impeller backboard 122 using multiple fasteners 166.In another embodiment, rotor assembly 140 and impeller 104 1
Formed to body.More specifically, rotor disk 146 and the backboard 122 of impeller 104 are integrally formed, so that rotor disk 146 and backboard
122 form single global facility.In general, rotor assembly 140 and impeller 104 use convenient for pump assembly 100 as described herein
Operation any attachment device and be directly coupled to together.As described above, traditional pump includes that rotor assembly is connected to impeller
Axis.However, as shown in Figures 2 and 3, pump assembly 100 does not include being connected in rotor assembly in one embodiment as described herein
Axis between 140 and impeller 104, because impeller 104 is directly coupled to rotor assembly 140 and contacts with rotor assembly 140.
In operation, the conductor coils 136 for being connected to stator core 134 are powered in chronological order, which provides basis and lead
Predetermined order or order that body coil 136 is powered and the axial magnetic field moved clockwise or counterclockwise around stator core 134.The shifting
Moving field intersects with the flux field generated by multiple permanent magnets 152, so that rotor assembly 140 is in a desired direction relative to fixed
Sub-component 133 is rotated around axis 126.As described above, the magnetic attraction between stator core 134 and magnet 152 generates axial magnetic
156, it acts on the direction far from impeller 104.Further, since rotor disk 146 is directly coupled to impeller 104, so rotor
The rotation of disk 146 causes the rotation of impeller 104.As described above, the rotation of impeller 104 is pressurizeed to fluid therein is flowed through, this
Axial suction 128 is applied to impeller 104 on direction far from rotor assembly 140.As shown in figure 3, axial suction 128 acts on axis
To on the opposite direction of magnetic force 156.In this embodiment, when rotor disk 146 is directly coupled to impeller 104, axial magnetic 156 is supported
For anti-axial suction 128 to reduce the summation of power, this is conducive to extend the service life of bearing assembly 138.In some embodiments,
Power 156 and 128 is equal, so that they cancel each other out.
In addition, in this exemplary embodiment, axial gap 154 is adjustable size to change axial magnetic 156.
In addition, electric motor assembly 102 is variable-speed motor, therefore the speed of impeller 104 also can be adjusted to adjust the axial direction of fluid
Suction 128.At least one of speed and the air gap 154 for modifying impeller 104 help to be formed in pump assembly 100 towards electronic
Thermomechanical components 102 or towards pump 106 expectation bias.Therefore, by reducing the resultant force in pump assembly 100 and being biased to joint efforts electronic
Thermomechanical components 102 or pump 106, can be used for integrated pump component 100 for simple and inexpensive bearing assembly 138.
Fig. 4 is the perspective view of an alternate embodiment of centrifugal pump assemblages 200, shows pump case 206 and motor case
Body 208.Fig. 5 is the bottom perspective view of centrifugal pump assemblages 200, wherein removing pump case 206 for clarity and showing leaf
Wheel 204.Fig. 6 is the sectional view of pump assembly 200, and it illustrates impeller 204 and axial flux motor component 202, Fig. 7 is electronic
The amplification sectional view for the part of thermomechanical components 202 and impeller 204 limited by the frame 7-7 in Fig. 6.
In this exemplary embodiment, pump assembly 200 includes pump case 206 and motor field frame 208.Pump case 206 is wrapped
At least part and impeller 204 of electric motor assembly 202 are enclosed, and motor field frame 208 surrounds electric motor assembly 202.Pump case
206 include the vortex wall 212 and fluid outlet 216 of a part of fluid inlet 210, restriction fluid flowing passage 214.It is operating
In, fluid flows through entry 210 and the channel 214 being conducted through around wall 212, until fluid leaves through housing outlets 216
Pump 200.
In this exemplary embodiment, impeller 204 is located in pump case 206 and including limiting entrance opening 220
Entrance ring 218.Impeller 204 further includes backboard 222 and multiple blades 224 for being connected between entrance ring 218 and backboard 222.Such as
Further detailed herein, the backboard 222 of impeller 202 is directly coupled to motor 202, so that motor 202 is configured to
Rotate impeller 202 around rotation axis 226.In operation, motor 202 rotates impeller 204 around axis 226, will flow
Body in axial direction sucks in the fluid cavity 228 limited by pump case 206 through housing inlet port 210.Fluid is conducted through entrance
Entrance opening 220 in ring 218, and turned to by the blade 224 in channel 214, to guide stream along the wall 212 in chamber 228
Body passes through housing outlets 216.When the speed of impeller 204 increases, increased by the Fluid Volume that pump assembly 200 moves, so that impeller
204 generate the high velocity fluid flow being discharged from outlet 216.
In this exemplary embodiment, electric motor assembly 202 includes stator module 232, and stator module 232 includes magnetic stator
Core 234 and multiple conductor coils 236.Electric motor assembly 202 further includes bearing assembly 238 and rotor assembly 240.Each conductor lines
Circle 236 includes opening (not shown), one outer shape being closely bonded in multiple stator core teeth 242, so that each
Stator tooth 242 is configured to be located in conductor coils 236.Electric motor assembly 202 can each stator tooth 242 include a conductor lines
Enclose 236 or every one conductor coils 236 of positioning on a tooth 242.
In this exemplary embodiment, electric motor assembly 202 further includes the electronic die for controlling the operation of electric motor assembly 202
Block 244.In one embodiment, electronic module 244 is coupled to conductor coils 236 by wiring and is configured to once to one
Or multiple conductor coils 236 apply voltages, for the sequence conversion conductor coil 236 of pre-selection, so that rotor assembly 240 is around axis
Line 226 rotates.As shown in fig. 6, electronic module 244 be coupled to stator module 232 and with stator module 232 be located in together by
In the chamber 245 that motor field frame 208 limits.
Rotor assembly 240 is located in the fluid cavity 228 of pump case 206, and including back iron or rotor disk 246, until
There is first axis surface 248 (as shown in Figure 7) less.In this exemplary embodiment, rotor assembly 240 further includes at least one
Permanent magnet 250 is relatively connected to rotor disk 246 using adhesive and impeller 204.Alternatively, magnet 250 can be used it is any
The keeping method for facilitating the operation of electric motor assembly 202 as described herein is connected to rotor disk 246.In another embodiment
In, magnet 250 is connected to magnet holder, and magnet holder is then connected to rotor disk 246.In addition, magnet 250 is single ring
One of shape magnet or multiple magnets.
In this exemplary embodiment, rotor assembly 240 is positioned adjacent to stator module 232, to define therebetween axial direction
Gap 254 (is shown in FIG. 7).In addition, impeller 204 and stator module 232 are relatively directly coupled to rotor assembly 240, make
It obtains impeller 204 and rotor assembly 240 is rotated and positioned in fluid cavity 228 around axis 226 and is immersed in fluid cavity 228
Fluid in.More specifically, rotor disk 246 is connected to impeller 204.Again more specifically, rotor disk 246 is connected to impeller 204
Backboard 222.In one embodiment, the axial surface 248 of rotor disk 246 is connected to the axis of backboard 222 with aspectant relationship
To surface 255.In this exemplary embodiment, and as shown in fig. 7, rotor disk 246 is connected to leaf using multiple fasteners 257
It takes turns on backboard 222.In another embodiment, rotor assembly 240 is integrally formed with impeller 204.More specifically, rotor disk 246
It is integrally formed with the backboard 222 of impeller 204.In general, rotor assembly 240 and impeller 204 are using any convenient for as described herein
Pump assembly 200 operation attachment device and be directly coupled to together.
In this exemplary embodiment, impeller 204 includes cylindrical portion 256, from backboard 222 towards motor case
Body 208 is axially extending.Extension 256 is connected to the rotary part 258 of bearing assembly 238.Rotary part 258 is external in bearing group
Around the fixation member 260 of part 238.In this exemplary embodiment, bearing assembly 238 includes hydrodynamic bearing.Another
In a little embodiments, bearing assembly 238 includes any bearing type for facilitating the operation of motor 102 as described herein.
As best seen in figure 7, motor field frame 208 further includes wall 262, and wall 262 is by fluid cavity 228 and stator module 232
It separates and at least partially defines chamber 245.More specifically, the flowing of fluid is limited in pump case 206 and will by wall 262
Stator module 232 and electronic module 244 and fluid cavity 228 are substantially sealed.In this exemplary embodiment, wall 262 includes axis
To part 264, axial component 264 located immediately at conductor coils 236 radially inner side, thus in wall axial component 264 and impeller
Radial clearance 266 is formed between extension 256.As described herein, gap 266 is allowed fluid in motor field frame 208
It is flowed between wall 262 and the extension 256 of impeller 204.In addition, wall 262 further includes radial component 268, radial component 268 is fixed
It is radially extended in axial gap 254 between sub-component 232 and rotor assembly 240.In addition, wall 262 limits fluid channel 270,
The fluid cavity 228 of itself and the radial outside of conductor coils 236 is in fluid communication.In this exemplary embodiment, as further below
Detailed description, motor cavity 245 of the wall portion 264 and 268 in fluid cavity 228 and storage stator module 232 and electronic module 244
Between form barrier.Wall portion 264 and 268 is located near conductor coils 236, so that coming from conductor coils when needing to heat
236 heat is transmitted by wall portion 264 and 268, to heat the fluid in fluid cavity 228.Similarly, during operation, it flows through
The relatively cool fluid of wall 262 is used to cool down the conductor coils 236 and stator core 234 of stator module 232, and is also used to cool down
Electronic module 244.
In operation, electronic module 244 be configured to once to one or more conductor coils 236 apply voltage, for
The sequence conversion conductor coil 236 of pre-selection, so that rotor assembly 240 is rotated around axis 226.It is connected to the conductor of stator core 234
Coil 236 is powered in chronological order, this provides axial magnetic field, the predetermined order which is powered according to conductor coils 236
Or order moves clockwise or counterclockwise around stator core 234.The shifting magnetic field and the flux field phase generated by permanent magnet 250
It hands over, so that rotor assembly 240 is rotated relative to stator module 232 around axis 226 in a desired direction.
In this exemplary embodiment, it can control the voltage for being applied to conductor coils 236, so that in conductor coils 236
Electric energy be converted into from coil 236 radiate thermal energy 272.In addition, frequency is applied to conductor coils 236, to change rotor set
Magnetic flux in part 240, so that the electromagnetic component of rotor assembly 240, --- i.e. rotor disk 246 --- is heated.Thermal energy 272 from
The fluid that conductor coils 236 are radiated and are transmitted in fluid cavity 228.More specifically, thermal energy 272 is from conductor coils 236 through wall
262 axial component 264 and radial component 268 is transmitted to the fluid in fluid cavity 228.Further, since rotor assembly 240 positions
At close stator module 232, so thermal energy 272 additionally aids heating magnet 250 and/or rotor disk 246, so that in magnet 250
And/or the temperature of the fluid of the immediate vicinity of rotor disk 246 increases.The induction heating of pump assembly 200 as described herein is used for
It prevents fluid freeze or defrosts to frozen fluid.
In this exemplary embodiment, pump assembly 200 can be located at so that when pump assembly 200 does not operate in fluid cavity 228
Fluid freeze environment in.In a fluid due to rotor assembly 240 and the submergence of impeller 204, so when fluid freeze, rotor
Component 240 and impeller 204 can be locked into place.In such a case, it is possible to heat conductor coils 236 without causing rotor set
The mode that part 240 rotates applies voltage.Then, thermal energy 272 is transmitted to frozen liquid and magnet 250 and/or rotor disk through wall 262
246, in order to the fluid that thaws, so that the rotor assembly 240 of submergence and impeller 204 be enable to rotate.Specifically, thermal energy 272 passes
It is delivered to axial gap 254 and radial clearance 266, in order to heat fluid therein.Rotor assembly 240 is connected to impeller 204
And rotor assembly 240 and impeller 204 are located in fluid cavity 228 and also close to the conductor coils 236 of stator module 232 make
Obtaining thermal energy 272 can make the fluid in chamber 272 heat up and magnet 250 and/or rotor disk 246 is also made to heat up.In addition, by rotor
Rotor assembly 240 is set to be exposed to fluid in the fluid that component 240 is immersed in fluid cavity 228, this is conducive to cooling magnet 250
And/or rotor disk 246 and prevent rotor assembly 240 be more than scheduled temperature extremes.
In addition, during standard operation both conductor coils 236 and electronic module 244 generate heat, may need
Cooling is to prevent conductor coils 236 and electronic module 244 more than scheduled temperature extremes.In this exemplary embodiment, conductor
Coil 236 and electronic module 244 and the motor field frame 208 of pump assembly 200 are positioned close to fluid cavity 228 together.As described above,
Relatively cool fluid is flowed along the axial component 264 and radial component 268 of wall 262, so that the temperature of wall 262 reduces.It is cooling
Wall 262 reduce the temperature of motor cavity 245, this is conducive to conductor coils 236 and electronic module 244 in cooling chamber 245.
Electronic module 244 and conductor coils 236 in motor cavity 245 facilitate close to the fluid in the fluid cavity 228 of pump case 206
Reduce the temperature of conductor coils 236 and electronic module 244.
Equipment described herein, method and system provide a kind of pump assembly, have the motor for being connected to impeller.More
Specifically, the rotor assembly of motor is directly coupled to impeller.Rotor assembly bears the axial suction from stator module, and
Impeller is born from the axial suction for flowing through fluid therein.As described herein, axial suction acts on the negative side of axial magnetic
Upwards to reduce the summation of power, this is conducive to extend the service life of electric motor assembly, particularly bearing assembly.
In addition, directly coupled rotor component and impeller and rotor assembly is positioned adjacent to that stator module makes it possible to will be hot
Measure the fluid being transmitted in rotor assembly and pump from stator module.More specifically, voltage is applied to multiple conductors of stator module
Coil and so that conductor coils is heated up.Thermal energy is radiated from conductor coils and the wall through motor field frame is transmitted to rotor assembly and passes
It is delivered to rotor assembly and is immersed in fluid therein, in order to make fluid and rotor assembly heat up.In addition, rotor assembly is immersed in
Rotor assembly is set to be exposed to fluid in fluid, this is conducive to the component of cooling rotor assembly and prevents rotor assembly from overheating.In addition,
Electronic module and conductor coils in motor cavity close to the fluid in the fluid cavity of pump case be conducive to cooling conductor coil and
Electronic module.
The exemplary embodiment of centrifugal pump assemblages is described in detail above.The centrifugal pump assemblages and its component are not limited to herein
The specific embodiment, specifically, the component of system can be used independently and separately make with other components as described herein
With.For example, each component can also be applied in combination with other machine systems, method and apparatus, and it is not limited to only with described herein
System and equipment practice.On the contrary, can implement and utilize exemplary embodiment in conjunction with many other applications.
In other attached drawings although the specific features of various embodiments of the present invention may be shown in some drawings
It is not shown, but this is intended merely to conveniently.Principle according to the present invention can join in conjunction with any feature of any other attached drawing
It examines any feature of attached drawing and/or requires its patent right.
The written description discloses the present invention, including optimal mode using example, and makes any person skilled in the art
The present invention can be practiced, including manufacturing and using any device or system and executing any be incorporated to method.Of the invention
Patentable scope is defined by the claims, and may include the other examples that those skilled in the art expect.If such other
Example is not different from structural detail described in the word language of claim, or includes the word language with claim
Equivalent structural elements without essential distinction, then it is assumed that such other examples are included in scope of protection of the claims.
Claims (40)
1. a kind of electric motor assembly, comprising:
Stator module；
Rotor assembly, which is positioned adjacent to the stator module, to define therebetween axial gap, wherein described fixed
Sub-component applies first axial force on the rotor assembly；With
Impeller, the impeller and the stator module are relatively directly coupled to the rotor assembly so that the rotor assembly and
The impeller construction is rotated at around an axis, wherein the fluid guided by the impeller applies a second axial on the impeller
Power.
2. electric motor assembly according to claim 1, wherein the first axial force acts on described turn along first direction
On sub-component, and wherein second axial force along second direction opposite to the first direction acts on the impeller
On.
3. electric motor assembly according to claim 1, wherein the rotor assembly includes rotor disk and multiple permanent magnets,
Wherein the rotor disk is directly coupled to the impeller, so that the rotor disk contacts the impeller.
4. electric motor assembly according to claim 3, wherein the impeller includes the foreboard and opposite back for limiting entrance
Plate, the backboard are directly coupled to the rotor disk.
5. electric motor assembly according to claim 3, wherein the rotor disk is integrally formed with the impeller.
6. electric motor assembly according to claim 1, wherein the impeller includes the foreboard for limiting entrance, opposite back
The multiple blades of plate and connection therebetween, wherein the backboard is directly coupled with aspectant relationship with the rotor assembly.
7. electric motor assembly according to claim 1 further includes being configured to the rotor assembly being connected to the impeller
Multiple fasteners.
8. electric motor assembly according to claim 1, wherein the impeller is integrally formed with the rotor assembly.
9. a kind of pump assembly, comprising:
Pump case；
It is connected to the motor field frame of the pump case；
Electric motor assembly comprising:
Stator module；With
Rotor assembly, which is positioned adjacent to the stator module, to define therebetween axial gap, wherein described fixed
Sub-component applies first axial force on the rotor assembly；With
Impeller, the impeller and the stator module are relatively directly coupled to the rotor assembly so that the rotor assembly and
The impeller construction is rotated at around an axis, wherein the fluid guided by the impeller applies a second axial on the impeller
Power.
10. pump assembly according to claim 9, wherein the rotor assembly includes rotor disk and multiple permanent magnets, wherein
The rotor disk is directly coupled to the impeller, so that the rotor disk contacts the impeller.
11. pump assembly according to claim 9, wherein the impeller include the foreboard for limiting entrance, opposite backboard and
The multiple blades of connection therebetween, wherein the backboard is directly coupled with aspectant relationship with the rotor assembly.
12. pump assembly according to claim 9, wherein the impeller is integrally formed with the rotor assembly.
13. pump assembly according to claim 9 further includes bearing assembly, the bearing assembly includes being connected to described turn
The rotating member of sub-component.
14. a kind of method for assembling pump assembly, which comprises
Stator module is provided；
Rotor assembly is connected to the stator module, so that axial gap is defined therebetween, wherein the stator module is in institute
It states and applies first axial force on rotor assembly；And
Impeller and the stator module are relatively directly coupled to the rotor assembly, so that the rotor assembly and the leaf
Wheel construction is rotated at around an axis, wherein being configured to apply a second axial power on impeller by the fluid that the impeller guides.
15. according to the method for claim 14, further includes:
Pump case is connected to motor field frame；
The stator module is connected in the motor case body；And
The rotor assembly and the impeller are located in the pump case.
16. further including according to the method for claim 14, modifying the length in the gap to change the first axial force
Size.
17. further including according to the method for claim 14, modifying the speed of the impeller to change second axial force
Size.
18. according to the method for claim 14, wherein it includes by institute that the impeller, which is directly coupled to the rotor assembly,
The rotor disk for stating rotor assembly is directly coupled to the impeller so that the rotor disk is contacted with the impeller.
19. according to the method for claim 14, wherein it includes by institute that the impeller, which is directly coupled to the rotor assembly,
The backboard of impeller is stated to couple with aspectant relationship with the rotor assembly.
20. according to the method for claim 14, wherein it includes by institute that the impeller, which is directly coupled to the rotor assembly,
Impeller is stated to be integrally formed with the rotor assembly.
21. a kind of electric motor assembly for by fluid pumping by fluid cavity, the electric motor assembly include:
Stator module, the stator module include multiple conductive coils, wherein the conductive coil is configured to transfer thermal energy to stream
Endoceliac fluid；
Rotor assembly, the rotor assembly are positioned adjacent to the stator module, to define therebetween axial gap；With
Impeller, the impeller and the stator module are relatively directly coupled to the rotor assembly so that the rotor assembly and
The impeller construction is rotated at around an axis, wherein the rotor assembly and the impeller construction are at the stream being immersed in fluid cavity
In body.
22. electric motor assembly according to claim 21 further includes motor field frame, the motor field frame is configured to receive
The stator module is received, wherein the motor field frame includes being configured to separate the fluid cavity and the stator module
Wall.
23. electric motor assembly according to claim 22, wherein the wall include close to the conductor coils diameter it is inside
The axial component of side positioning.
24. electric motor assembly according to claim 23, wherein the impeller includes axially-extending portion, and wherein exists
Radial clearance is defined between the axially-extending portion and the axial component of the wall.
25. electric motor assembly according to claim 22, wherein the wall is included in the stator module and the rotor
The radial component radially extended in the axial gap between component.
26. electric motor assembly according to claim 22, wherein the conductor coils are configured to through the wall transferring heat energy
To heat the fluid in the fluid cavity.
27. electric motor assembly according to claim 21, wherein the wall is limited in the radial outside of the conductor coils
One fluid channel, the fluid channel and the fluid cavity are in fluid communication.
28. electric motor assembly according to claim 21, wherein the rotor assembly includes rotor disk and multiple permanent magnetism
Body, wherein the rotor disk is connected to the impeller.
29. electric motor assembly according to claim 28, wherein the impeller includes the foreboard and opposite direction for limiting entrance
Backboard, the backboard are connected to the rotor disk.
30. a kind of pump assembly, comprising:
Limit the pump case of fluid cavity；
It is connected to the motor field frame of the pump case；
Electric motor assembly comprising:
Stator module, the stator module are located in the motor case body and including multiple conductive coils, wherein described
Conductive coil is configured to the fluid transferred thermal energy in the fluid cavity；With
Rotor assembly, the rotor assembly are positioned adjacent to the stator module and are located in the pump case；With
Impeller, the impeller and the stator module are relatively directly coupled to the rotor assembly, so that the rotor assembly
It is rotated with the impeller construction at around an axis, wherein the rotor assembly and the impeller construction are at being immersed in the fluid cavity
In interior fluid.
31. pump assembly according to claim 30, wherein the motor field frame includes wall, the wall is configured to will be described
Fluid cavity is separated with the stator module.
32. pump assembly according to claim 31, wherein the wall include close to the conductor coils radially inner side it is fixed
The radial component radially extended in the axial component of position and the axial gap between the conductor coils and the rotor assembly.
33. pump assembly according to claim 31, wherein the impeller includes axially-extending portion, and wherein described
Radial clearance is limited between axially-extending portion and the axial component of the wall.
34. pump assembly according to claim 31, wherein the conductor coils are configured to through the wall transferring heat energy to add
Fluid in the heat fluid cavity.
35. a kind of method for assembling pump assembly, the pump assembly pass through fluid cavity for pumping fluid, which comprises
The stator module including multiple conductive coils is provided, wherein the conductive coil is configured to transfer thermal energy to the fluid
Intracavitary fluid；
Rotor assembly is positioned adjacent to the stator module, so that defining therebetween axial gap；And
Impeller and stator module are relatively directly coupled to the rotor assembly, so that the rotor assembly and the impeller structure
It causes to rotate around an axis, wherein the rotor assembly and the impeller construction are in the fluid being immersed in the fluid cavity.
36. according to the method for claim 35, further includes:
Pump case is connected to motor field frame, wherein the pump case limits the fluid cavity；
The stator module is connected in the motor case body；And
The rotor assembly and the impeller are located in the fluid cavity in the pump case.
37. according to the method for claim 35, wherein being connected in the stator module includes leaning in the housing unit
The wall of the nearly motor field frame couples the conductor coils, wherein the wall separates the fluid cavity with the conductor coils
It opens.
38. according to the method for claim 37, wherein the rotor assembly, which is positioned adjacent to the stator module, includes
The rotor assembly is positioned adjacent to the stator module so that thermal energy is transmitted to institute through the wall by the conductor coils
State the fluid in fluid cavity.
39. according to the method for claim 37, wherein the wall close to the motor field frame couples the conductor coils packet
It includes:
The axial component positioned close to the radially inner side close to the conductor coils of the wall couples the conductor coils；And
The radial part radially extended in the axial gap between the conductor coils and the rotor assembly of the wall
Divide connection the conductor coils.
40. according to the method for claim 35, wherein the rotor assembly is immersed in include in the fluid will be described
Rotor assembly is exposed to the fluid to be conducive to cool down the rotor assembly.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US15/418,146 | 2017-01-27 | ||
| US15/418,103 | 2017-01-27 | ||
| US15/418,146 US10865794B2 (en) | 2017-01-27 | 2017-01-27 | Centrifugal pump assemblies having an axial flux electric motor and methods of assembly thereof |
| US15/418,103 US10830252B2 (en) | 2017-01-27 | 2017-01-27 | Centrifugal pump assemblies having an axial flux electric motor and methods of assembly thereof |
| PCT/US2018/015446 WO2018140724A1 (en) | 2017-01-27 | 2018-01-26 | Centrifugal pump assemblies having an axial flux electric motor and methods of assembly thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110462218A true CN110462218A (en) | 2019-11-15 |
| CN110462218B CN110462218B (en) | 2021-09-10 |
Family
ID=62979031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880021409.8A Expired - Fee Related CN110462218B (en) | 2017-01-27 | 2018-01-26 | Centrifugal pump assembly with axial flux motor and method of assembling the same |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3574217A4 (en) |
| CN (1) | CN110462218B (en) |
| AU (1) | AU2018213369A1 (en) |
| WO (1) | WO2018140724A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187758A (en) * | 2021-06-22 | 2021-07-30 | 晋江爱家制冷设备有限公司 | Impeller axial force counteracts and balancing unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4615662A (en) * | 1985-11-21 | 1986-10-07 | Karsten Laing | Axial thrust compensation for centrifugal pump |
| US4806080A (en) * | 1983-07-06 | 1989-02-21 | Ebara Corporation | Pump with shaftless impeller |
| US6012909A (en) * | 1997-09-24 | 2000-01-11 | Ingersoll-Dresser Pump Co. | Centrifugal pump with an axial-field integral motor cooled by working fluid |
| WO2000037804A1 (en) * | 1998-12-22 | 2000-06-29 | Jeumont Sa | Power driven device with centrifugal fluid circulation, such as a motor pump or a motor compressor |
| US20020094281A1 (en) * | 1996-05-03 | 2002-07-18 | Khanwilkar Pratap S. | Hybrid magnetically suspended and rotated centrifugal pumping apparatus and method |
| US20060247486A1 (en) * | 2003-07-04 | 2006-11-02 | Nikolaus Mendler | Centrifugal pump |
| US20110238172A1 (en) * | 2006-08-06 | 2011-09-29 | Mustafa Akdis | Blood pump |
| US8353687B2 (en) * | 2008-12-19 | 2013-01-15 | Dohler Motor GmbH | Rotary pump with a fixed shaft |
| US20140377101A1 (en) * | 2012-01-20 | 2014-12-25 | Yasa Motors Poland Sp. Z O.O. | Wet rotor pump comprising a plain bearing |
| US20150017031A1 (en) * | 2011-12-27 | 2015-01-15 | Grundfos Holding A/S | Pump assembly |
| US20160131141A1 (en) * | 2014-11-06 | 2016-05-12 | Ebara Corporation | Magnetic levitated pump |
-
2018
- 2018-01-26 AU AU2018213369A patent/AU2018213369A1/en not_active Abandoned
- 2018-01-26 EP EP18744140.7A patent/EP3574217A4/en not_active Withdrawn
- 2018-01-26 WO PCT/US2018/015446 patent/WO2018140724A1/en unknown
- 2018-01-26 CN CN201880021409.8A patent/CN110462218B/en not_active Expired - Fee Related
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4806080A (en) * | 1983-07-06 | 1989-02-21 | Ebara Corporation | Pump with shaftless impeller |
| US4615662A (en) * | 1985-11-21 | 1986-10-07 | Karsten Laing | Axial thrust compensation for centrifugal pump |
| US20020094281A1 (en) * | 1996-05-03 | 2002-07-18 | Khanwilkar Pratap S. | Hybrid magnetically suspended and rotated centrifugal pumping apparatus and method |
| US6012909A (en) * | 1997-09-24 | 2000-01-11 | Ingersoll-Dresser Pump Co. | Centrifugal pump with an axial-field integral motor cooled by working fluid |
| WO2000037804A1 (en) * | 1998-12-22 | 2000-06-29 | Jeumont Sa | Power driven device with centrifugal fluid circulation, such as a motor pump or a motor compressor |
| US20060247486A1 (en) * | 2003-07-04 | 2006-11-02 | Nikolaus Mendler | Centrifugal pump |
| US20110238172A1 (en) * | 2006-08-06 | 2011-09-29 | Mustafa Akdis | Blood pump |
| US8353687B2 (en) * | 2008-12-19 | 2013-01-15 | Dohler Motor GmbH | Rotary pump with a fixed shaft |
| US20150017031A1 (en) * | 2011-12-27 | 2015-01-15 | Grundfos Holding A/S | Pump assembly |
| US20140377101A1 (en) * | 2012-01-20 | 2014-12-25 | Yasa Motors Poland Sp. Z O.O. | Wet rotor pump comprising a plain bearing |
| US20160131141A1 (en) * | 2014-11-06 | 2016-05-12 | Ebara Corporation | Magnetic levitated pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187758A (en) * | 2021-06-22 | 2021-07-30 | 晋江爱家制冷设备有限公司 | Impeller axial force counteracts and balancing unit |
| CN113187758B (en) * | 2021-06-22 | 2022-06-07 | 晋江爱家制冷设备有限公司 | Impeller axial force counteracts and balancing unit |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018140724A1 (en) | 2018-08-02 |
| EP3574217A4 (en) | 2020-11-25 |
| CN110462218B (en) | 2021-09-10 |
| AU2018213369A1 (en) | 2019-08-15 |
| EP3574217A1 (en) | 2019-12-04 |
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