CN113623245A - Magnetic suspension axial flow fan with impeller as thrust disc - Google Patents

Magnetic suspension axial flow fan with impeller as thrust disc Download PDF

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Publication number
CN113623245A
CN113623245A CN202110880948.0A CN202110880948A CN113623245A CN 113623245 A CN113623245 A CN 113623245A CN 202110880948 A CN202110880948 A CN 202110880948A CN 113623245 A CN113623245 A CN 113623245A
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CN
China
Prior art keywords
impeller
fan
axial
radial
magnetic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110880948.0A
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Chinese (zh)
Inventor
钟仁志
袁军
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Xinlei Compressor Co Ltd
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Xinlei Compressor Co Ltd
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Filing date
Publication date
Application filed by Xinlei Compressor Co Ltd filed Critical Xinlei Compressor Co Ltd
Priority to CN202110880948.0A priority Critical patent/CN113623245A/en
Publication of CN113623245A publication Critical patent/CN113623245A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
    • 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
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056—Bearings
    • F04D29/058—Bearings magnetic; electromagnetic
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/263—Rotors specially for elastic fluids mounting fan or blower rotors on shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/388—Blades characterised by construction
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/64—Mounting; Assembling; Disassembling of axial pumps
    • F04D29/644—Mounting; Assembling; Disassembling of axial pumps especially adapted for elastic fluid pumps
    • F04D29/646—Mounting or removal of fans

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention relates to the field of axial flow fans, in particular to a magnetic suspension axial flow fan taking an impeller as a thrust disc. The axial flow fan comprises a casing, a fan shaft, a fan stator, a radial magnetic bearing, an impeller and an axial magnetic bearing; the casing is provided with an axially-penetrating air duct, and the fan shaft is provided with a fan rotor and a radial bearing rotor; the fan stator is fixedly embedded in the inner hole of the shell and is aligned with the fan rotor; the radial magnetic bearings are respectively sleeved at two ends of the fan shaft, and the positions of the radial magnetic bearings correspond to the positions of the radial bearing rotors; the impeller is fixedly arranged on the fan shaft, and two axial side surfaces of the impeller are magnetic guide surfaces; the axial magnetic bearing comprises a front limit bearing and a rear limit bearing, and limit ends of the front limit bearing and the rear limit bearing respectively correspond to the magnetic conduction surfaces on two axial sides of the impeller. The axial flow fan reduces the number of devices, the equipment volume and the complexity of an assembly process, and is favorable for quick assembly of the axial flow fan.

Description

Magnetic suspension axial flow fan with impeller as thrust disc
Technical Field
The invention relates to the field of axial flow fans, in particular to a magnetic suspension axial flow fan taking an impeller as a thrust disc.
Background
The axial flow fan has a very wide application, namely, the axial flow fan and the fan blade have the same direction of air flow, such as an electric fan, and an air conditioner outer machine fan is an axial flow type running fan. Axial flow is so called because the gas flows parallel to the fan axis. Axial flow fans are typically used in applications where flow requirements are high and pressure requirements are low. The axial fan fixes the position and moves the air. The axial flow fan mainly comprises a fan impeller and a casing, and is simple in structure but high in data requirement.
The Chinese utility model patent application (publication No. CN106593919A, published as 20170426) discloses a 300kw magnetic suspension high-speed fan structure, wherein a volute and an air inlet channel are both fixed at the top end of a double-layer air-cooled casing, the volute and the air inlet channel are both communicated with the double-layer air-cooled casing, a rear cover is fixed at the bottom end of the double-layer air-cooled casing, a stator and a magnetic bearing are fixed in the double-layer air-cooled casing, a rotor is rotatably supported in the stator and the magnetic bearing, the top end of the rotor extends into the air inlet channel, a shock absorber is fixed on the outer wall of the double-layer air-cooled casing, an upper axial flow fan and a lower axial flow fan are both fixed on the rotor, the upper axial flow fan is arranged between the stator and the magnetic bearing, and the lower axial flow fan is arranged at the lower end of the stator; the cooling copper pipe is arranged in the double-layer air-cooled type casing, a liquid inlet and a liquid outlet which are communicated with the cooling copper pipe are arranged on the side wall of the double-layer air-cooled type casing, the condenser is connected with the refrigerating pump, and the refrigerating pump is correspondingly connected with the liquid inlet and the liquid outlet. The invention has simple structure and good cooling effect.
The prior art has the following defects: the axial magnetic bearing controls the axial position of the fan shaft by controlling the thrust disc, and the impeller is used for driving air to flow; in this way, the two devices of the thrust disc and the impeller are respectively needed to control the fan shaft and drive the air to flow, so that the number of the devices, the equipment volume and the complexity of the assembly process are increased, and the rapid assembly of the axial flow fan is not facilitated.
Disclosure of Invention
The purpose of the invention is: aiming at the problems, magnetic guide surfaces are arranged on two axial sides of the impeller, and a front limit bearing and a rear limit bearing are respectively arranged on two sides of the impeller, so that the impeller has the function of a thrust disc; therefore, the number of devices, the equipment volume and the complexity of the assembly process are reduced, and the magnetic suspension axial flow fan taking the impeller as the thrust disc is favorable for the quick assembly of the axial flow fan.
In order to achieve the purpose, the invention adopts the following technical scheme:
a magnetic suspension axial flow fan taking an impeller as a thrust disc comprises a shell, a fan shaft, a fan stator, a radial magnetic bearing, the impeller and an axial magnetic bearing; the casing is provided with an axially-penetrating air duct, and the fan shaft is provided with a fan rotor and a radial bearing rotor; the fan stator is fixedly embedded in the inner hole of the shell and is aligned with the fan rotor; the radial magnetic bearings are respectively sleeved at two ends of the fan shaft, and the positions of the radial magnetic bearings correspond to the positions of the radial bearing rotors; the impeller is fixedly arranged on the fan shaft, and two axial side surfaces of the impeller are magnetic guide surfaces; the axial magnetic bearing comprises a front limit bearing and a rear limit bearing, and limit ends of the front limit bearing and the rear limit bearing respectively correspond to the magnetic conduction surfaces on two axial sides of the impeller.
Preferably, the magnetic conductive surface material on the two axial side surfaces of the impeller is FV 520B.
Preferably, the impeller comprises an impeller body, blades and a sealing part, wherein the blades are positioned at the outermost side in the radial direction of the impeller, and the blades are positioned in the air duct; the sealing part is radially positioned between the air duct and internal parts of the axial flow fan and used for preventing air flow in the air duct from entering the axial flow fan.
Preferably, the impeller body is provided with a plurality of weight-removing holes and a plurality of reinforcing ribs, and the reinforcing ribs are positioned between two adjacent weight-removing holes.
Preferably, the impeller body is connected with the fan shaft through a key.
Preferably, the housing comprises an inlet housing and an outlet housing; the inlet casing is provided with an inlet guide vane and an inlet fairing, and the inlet fairing is positioned at the inlet end of the inlet casing; the inlet fairing is provided with an inlet fairing guide vane, and the tail end of the inlet fairing guide vane is aligned with the head end of the inlet guide vane; the outlet casing is provided with an outlet guide vane and an outlet fairing, and the outlet fairing is positioned at the outlet end of the outlet casing; the outlet fairing is provided with outlet fairing guide vanes, and the tail ends of the outlet guide vanes are aligned with the head ends of the outlet fairing guide vanes.
Preferably, the blades of the impeller are located between the inlet guide vane tip and the outlet guide vane head end.
Preferably, the axial flow fan is further provided with a radial-axial sensor and a radial-axial measured body, the radial-axial measured body is fixedly arranged on the fan shaft, and the sensing end of the radial-axial sensor corresponds to the position of the radial-axial measured body.
Preferably, the radial and axial object to be measured is a plurality of silicon steel sheets stacked on each other in the axial direction.
Preferably, the axial flow fan is further provided with a protection bearing, the protection bearings are respectively sleeved at two ends of the fan shaft, an outer ring of the protection bearing is in interference fit with the casing, and a gap exists between an inner ring of the protection bearing and the fan shaft.
The magnetic suspension axial flow fan adopting the technical scheme has the advantages that:
when the fan shaft works, the fan stator is electrified to drive the fan rotor to rotate so as to drive the fan shaft to rotate; the radial magnetic bearing provides radial support for the fan shaft, and the front limit bearing and the rear limit bearing respectively limit the magnetic conduction surfaces on two sides of the impeller so as to provide axial limit for the fan shaft; the impeller is driven by the fan shaft to rotate so as to drive air to axially flow to complete the working process of the axial flow fan. In the mode, one impeller can simultaneously complete two functions of controlling the axial position of the fan shaft and driving air to flow, so that the number of devices, the equipment volume and the complexity of an assembly process are reduced, and the rapid assembly of the axial flow fan is facilitated. Meanwhile, the fan shaft is supported by the magnetic bearing, so that the fan shaft has the characteristics of low power consumption and capability of supporting high rotating speed, the blade volume of the impeller with high rotating speed is small, the efficiency is high, and the whole device is oil-free and maintenance-free.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2-4 are schematic views of the structure of the impeller.
Fig. 5-7 are schematic structural views of the inlet housing.
Fig. 8-10 are schematic views of inlet cowlings.
Fig. 11-13 are schematic structural views of the outlet housing.
FIGS. 14-16 are schematic views of the structure of the outlet cowling.
Fig. 17 is a schematic view of the structure of the flow field.
L1-air flow direction, L2-impeller blade rotation direction.
Detailed Description
The following describes in detail embodiments of the present invention with reference to the drawings.
Example 1
As shown in fig. 1, the magnetic suspension axial flow fan using an impeller as a thrust disc comprises a casing 1, a fan shaft 2, a fan stator 3, a radial magnetic bearing 4, an impeller 5 and an axial magnetic bearing 6; the casing 1 is provided with an air duct 11 which axially penetrates through the casing, and the fan shaft 2 is provided with a fan rotor 21 and a radial bearing rotor; the fan stator 3 is fixedly embedded in an inner hole of the shell 1, and the fan stator 3 is aligned with the fan rotor 21; the radial magnetic bearings 4 are respectively sleeved at two ends of the fan shaft 2, and the positions of the radial magnetic bearings 4 correspond to the positions of radial bearing rotors; the impeller 5 is fixedly arranged on the fan shaft 2, and two axial side surfaces of the impeller 5 are magnetic guide surfaces; the axial magnetic bearing 6 comprises a front limit bearing 61 and a rear limit bearing 62, and limit ends of the front limit bearing 61 and the rear limit bearing 62 respectively correspond to magnetic conduction surfaces on two axial sides of the impeller 5. When the fan is in operation, the fan stator 3 is electrified to drive the fan rotor 21 to rotate so as to drive the fan shaft 2 to rotate; the radial magnetic bearing 4 provides radial support for the fan shaft 2, and the front limit bearing 61 and the rear limit bearing 62 respectively limit the magnetic conduction surfaces on two sides of the impeller 5 so as to provide axial limit for the fan shaft 2; the impeller 5 is driven by the fan shaft 2 to rotate so as to drive air to axially flow to complete the working process of the axial flow fan. In the mode, the impeller 5 can simultaneously complete two functions of controlling the axial position of the fan shaft and driving air to flow by one device, so that the number of the devices, the equipment volume and the complexity of an assembly process are reduced, and the rapid assembly of the axial flow fan is facilitated. Meanwhile, the fan shaft 2 is supported by the magnetic bearing, so that the fan has the characteristics of low power consumption and capability of supporting high rotating speed, the blade volume of the impeller 5 with high rotating speed is small, the efficiency is high, and the whole device is oil-free and maintenance-free.
The magnetic conductive surface materials on the two axial side surfaces of the impeller 5 are FV 520B. FV520B has the advantages of high strength, good magnetic conductivity and easy processing.
As shown in fig. 2 to 5, the impeller 5 includes an impeller body 51, blades 52 and a seal portion 53, the blades 52 are located at the outermost side in the radial direction of the impeller 5, and the blades 52 are located in the air duct 11; the sealing portion 53 is located between the air duct 11 and the internal components of the axial flow fan in the radial direction, and is used for preventing the air flow in the air duct 11 from entering the internal of the axial flow fan.
The impeller body 51 is provided with a plurality of weight-removing holes 54 and a plurality of reinforcing ribs 55, the reinforcing ribs 55 being located between two adjacent weight-removing holes 54. The use of the de-weighting holes 54 reduces the weight of the impeller 5, reducing the support weight and the working strength of the radial magnetic bearings 4.
The impeller body 51 is connected with the fan shaft 2 through a key.
As shown in fig. 1, 6-16, the housing 1 includes an inlet housing 12 and an outlet housing 13; the inlet casing 12 is provided with inlet guide vanes 14 and an inlet cowling 15, the inlet cowling 15 being located at an inlet end of the inlet casing 12; the inlet cowling 15 is provided with inlet cowling guide vanes 151, the tail ends of the inlet cowling guide vanes 151 are aligned with the head ends of the inlet guide vanes 14; the outlet casing 13 is provided with outlet guide vanes 16 and an outlet fairing 17, the outlet fairing 17 being located at the outlet end of the outlet casing 13; the outlet fairing 17 is provided with outlet fairing guide vanes 171, the outlet guide vanes 16 having their distal ends aligned with the head ends of the outlet fairing guide vanes 171.
As shown in fig. 17, the blades 52 of the impeller 5 are located between the inlet guide vane 14 tip and the outlet guide vane 16 head. That is, the air in the air duct 11 is guided by the inlet cowling guide vanes 151, the inlet guide vanes 14, the blades 52, the outlet guide vanes 16, and the outlet cowling guide vanes 171 to flow, and this full-duct vane design makes the flow field more efficient.
As shown in fig. 1, the axial flow fan is further provided with a radial-axial sensor 7 and a radial-axial measured body 8, the radial-axial measured body 8 is fixedly arranged on the fan shaft 2, and the sensing end of the radial-axial sensor 7 corresponds to the position of the radial-axial measured body 8. The radial and axial measured body 8 is a plurality of silicon steel sheets stacked on each other in the axial direction. The radial/axial sensor 7 controls the radial and axial positions of the fan shaft 2 by detecting the radial and axial movements of the radial/axial subject 8.
The axial flow fan is further provided with a protection bearing 9, the protection bearings 9 are respectively sleeved at two ends of the fan shaft 2, the outer ring of the protection bearing 9 is in interference fit with the casing 1, and a gap exists between the inner ring of the protection bearing 9 and the fan shaft 2. When the motor is suddenly powered off or stopped, the radial magnetic bearing 4 and the axial magnetic bearing 6 lose magnetic force and cannot support and limit the fan shaft 2, and the fan shaft 2 falls down and contacts with the inner ring of the protective bearing 9 to be supported by the protective bearing 9; therefore, the damage of important parts such as the radial magnetic bearing 4 and the axial magnetic bearing 6 caused by the sudden falling of the fan shaft 2 when the motor is suddenly powered off or stopped is avoided.

Claims (10)

1. A magnetic suspension axial flow fan taking an impeller as a thrust disc is characterized by comprising a casing (1), a fan shaft (2), a fan stator (3), a radial magnetic bearing (4), an impeller (5) and an axial magnetic bearing (6); the casing (1) is provided with an axially-penetrating air duct (11), and the fan shaft (2) is provided with a fan rotor (21) and a radial bearing rotor; the fan stator (3) is fixedly embedded in an inner hole of the shell (1), and the fan stator (3) is aligned with the fan rotor (21); the radial magnetic bearings (4) are respectively sleeved at two ends of the fan shaft (2), and the positions of the radial magnetic bearings (4) correspond to the positions of radial bearing rotors; the impeller (5) is fixedly arranged on the fan shaft (2), and two axial side surfaces of the impeller (5) are magnetic guide surfaces; the axial magnetic bearing (6) comprises a front limit bearing (61) and a rear limit bearing (62), and limit ends of the front limit bearing (61) and the rear limit bearing (62) respectively correspond to magnetic conduction surfaces on two axial sides of the impeller (5).
2. The magnetic suspension axial flow fan taking the impeller as the thrust disc as claimed in claim 1, wherein the magnetic conductive surface materials on the two axial sides of the impeller (5) are FV 520B.
3. The magnetic suspension axial flow fan taking the impeller as the thrust disc is characterized in that the impeller (5) comprises an impeller body (51), blades (52) and a sealing part (53), the blades (52) are positioned at the outermost radial side of the impeller (5), and the blades (52) are positioned in the air duct (11); the sealing part (53) is radially positioned between the air duct (11) and internal parts of the axial flow fan and is used for preventing air flow in the air duct (11) from entering the internal part of the axial flow fan.
4. The axial flow fan with magnetic levitation and taking the impeller as the thrust disc as claimed in claim 3, wherein the impeller body (51) is provided with a plurality of weight-removing holes (54) and a plurality of reinforcing ribs (55), and the reinforcing ribs (55) are located between two adjacent weight-removing holes (54).
5. The axial flow fan with magnetic suspension and taking the impeller as the thrust disc is characterized in that the impeller body (51) is connected with the fan shaft (2) through a key.
6. The axial flow fan with magnetic levitation and taking the impeller as the thrust disc as the claim 1 is characterized in that the casing (1) comprises an inlet casing (12) and an outlet casing (13); the inlet casing (12) is provided with inlet guide vanes (14) and an inlet fairing (15), and the inlet fairing (15) is positioned at the inlet end of the inlet casing (12); the inlet fairing (15) is provided with an inlet fairing guide vane (151), and the tail end of the inlet fairing guide vane (151) is aligned with the head end of the inlet guide vane (14); the outlet casing (13) is provided with an outlet guide vane (16) and an outlet fairing (17), and the outlet fairing (17) is positioned at the outlet end of the outlet casing (13); the outlet fairing (17) is provided with outlet fairing guide vanes (171), and the tail ends of the outlet guide vanes (16) are aligned with the head ends of the outlet fairing guide vanes (171).
7. The maglev axial fan with an impeller as a thrust disc according to claim 3 or 6, characterized in that blades (52) of the impeller (5) are located between the inlet guide vane (14) end and the outlet guide vane (16) head end.
8. The magnetic suspension axial flow fan taking the impeller as the thrust disc is characterized in that the axial flow fan is further provided with a radial-axial sensor (7) and a radial-axial measured body (8), the radial-axial measured body (8) is fixedly arranged on the fan shaft (2), and the sensing end of the radial-axial sensor (7) corresponds to the position of the radial-axial measured body (8).
9. The axial flow fan with magnetic suspension taking the impeller as the thrust disc as claimed in claim 8, wherein the radial and axial tested body (8) is a plurality of silicon steel sheets stacked on each other in the axial direction.
10. The magnetic suspension axial flow fan taking the impeller as the thrust disc is characterized in that the axial flow fan is further provided with a plurality of protective bearings (9), the protective bearings (9) are respectively sleeved at two ends of the fan shaft (2), the outer ring of each protective bearing (9) is in interference fit with the casing (1), and a gap exists between the inner ring of each protective bearing (9) and the fan shaft (2).
CN202110880948.0A 2021-08-02 2021-08-02 Magnetic suspension axial flow fan with impeller as thrust disc Pending CN113623245A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110880948.0A CN113623245A (en) 2021-08-02 2021-08-02 Magnetic suspension axial flow fan with impeller as thrust disc

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Application Number Priority Date Filing Date Title
CN202110880948.0A CN113623245A (en) 2021-08-02 2021-08-02 Magnetic suspension axial flow fan with impeller as thrust disc

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08338388A (en) * 1995-06-14 1996-12-24 Ebara Corp Axial flow fluid electric machine
CN106357052A (en) * 2016-09-26 2017-01-25 南京磁谷科技有限公司 Air cooling structure of magnetic suspension motor
CN206023440U (en) * 2016-08-02 2017-03-15 天津飞旋科技研发有限公司 A kind of pure air-cooled heat dissipation structure of the magnetic suspension motor of impeller one
WO2019064881A1 (en) * 2017-09-26 2019-04-04 日本電産コパル電子株式会社 Axial flow fan
CN110571971A (en) * 2019-11-06 2019-12-13 山东天瑞重工有限公司 magnetic suspension motor with negative pressure air cooling device
CN110762032A (en) * 2019-11-19 2020-02-07 湖南联诚轨道装备有限公司 Lightweight axial flow cooling fan of alternating current transmission locomotive
CN215860876U (en) * 2021-08-02 2022-02-18 鑫磊压缩机股份有限公司 Magnetic suspension axial flow fan with impeller as thrust disc

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08338388A (en) * 1995-06-14 1996-12-24 Ebara Corp Axial flow fluid electric machine
CN206023440U (en) * 2016-08-02 2017-03-15 天津飞旋科技研发有限公司 A kind of pure air-cooled heat dissipation structure of the magnetic suspension motor of impeller one
CN106357052A (en) * 2016-09-26 2017-01-25 南京磁谷科技有限公司 Air cooling structure of magnetic suspension motor
WO2019064881A1 (en) * 2017-09-26 2019-04-04 日本電産コパル電子株式会社 Axial flow fan
CN110571971A (en) * 2019-11-06 2019-12-13 山东天瑞重工有限公司 magnetic suspension motor with negative pressure air cooling device
CN110762032A (en) * 2019-11-19 2020-02-07 湖南联诚轨道装备有限公司 Lightweight axial flow cooling fan of alternating current transmission locomotive
CN215860876U (en) * 2021-08-02 2022-02-18 鑫磊压缩机股份有限公司 Magnetic suspension axial flow fan with impeller as thrust disc

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