CN104154028A - Blower capable of reducing axial force of rotor - Google Patents
Blower capable of reducing axial force of rotor Download PDFInfo
- Publication number
- CN104154028A CN104154028A CN201410385154.7A CN201410385154A CN104154028A CN 104154028 A CN104154028 A CN 104154028A CN 201410385154 A CN201410385154 A CN 201410385154A CN 104154028 A CN104154028 A CN 104154028A
- Authority
- CN
- China
- Prior art keywords
- permanent magnet
- nut
- bearing
- rotor
- cooling fan
- 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.)
- Granted
Links
- 238000001816 cooling Methods 0.000 claims abstract description 30
- 230000001681 protective effect Effects 0.000 abstract 6
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 abstract 4
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000003292 glue Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention discloses a blower capable of reducing the axial force of a rotor and belongs to the technical field of machinery. The blower comprises the rotor, an impeller, a cooling fan, a protective bearing, a thrust magnetic bearing, a bearing pedestal and a bearing support, wherein the impeller is mounted at the upper tail end of the rotor, the cooling fan is mounted at the lower tail end of the rotor, the protective bearing and the thrust magnetic bearing are mounted on the rotor and located between the impeller and the cooling fan, the protective bearing is mounted in the bearing pedestal, the bearing pedestal is mounted in the bearing support, and the protective bearing is located below the thrust magnetic bearing. A nut is mounted at the position, between the protective bearing and the cooling fan, of the rotor in a connected mode. A permanent magnet base is mounted below the bearing pedestal. The upper section of the nut is mounted in the permanent magnet base, and the edge of the upper tail end of the nut does not make contact with the lower surface of the protective bearing. The lower section of the nut is located below the lower surface of the permanent magnet base, and the edge of the lower tail end of the nut makes contact with the surface of the upper end of the cooling fan. A permanent magnet is arranged in the permanent magnet base in a bonding mode, wherein the permanent magnet is spaced from the upper section of the nut and used for generating downward attraction for the nut.
Description
Technical field:
The present invention relates to a kind of blower fan that can reduce rotor axial power, it belongs to field of mechanical technique.
Background technique:
Rotor is the core component of blower fan.In the time of fan operation, the impeller of rotor upper end, owing to being subject to the effect of aerodynamic force, will cause whole rotor to bear the tensile force f 1 of a upward direction, and the value of this power F1 is very large.For this pulling force upwards of balance, thrust magnetic bearing in blower fan can produce a downward suction F2 to rotor, if F2 is used for to complete equilibrium tensile force f 1 upwards, will cause the operating current of thrust magnetic bearing bigger than normal, so can affect for a long time its working stability, have potential safety hazard.Therefore, need to consider that otherwise is assisted to eliminate the impact of this tensile force f 1, or at least offset a part, make to protect the operating current of bearing to reduce.
Summary of the invention:
The present invention, for solving above-mentioned prior art problem, provides a kind of blower fan that can reduce rotor axial power.
The present invention adopts following technological scheme: a kind of blower fan that can reduce rotor axial power, it comprises rotor, be installed on the impeller of end on rotor, be installed on the cooling fan of rotor lower end, be installed on protection bearing and thrust magnetic bearing epitrochanterian and between impeller and cooling fan, protection bearing is installed on to bearing support wherein, bearing support is installed on to bearing bracket wherein, described protection bearing is positioned at the below of thrust magnetic bearing, position on described rotor between protection bearing and cooling fan is threaded connection a nut is installed, one permanent magnet seat is installed below described bearing support, the epimere portion of described nut is installed in permanent magnet seat and the upper end edge of nut does not contact with the lower surface of described protection bearing, the below of lower surface and the lower end edge of nut that the hypomere portion of described nut is positioned at permanent magnet seat contact with the upper end face of cooling fan, in described permanent magnet seat bonding be provided with one with the epimere portion of nut separately and produce the permanent magnet of downward suction for nut.
Further, described nut comprises first portion and is positioned at the second portion of first portion below, described first portion is up-narrow and down-wide step-like, second portion is also up-narrow and down-wide step-like, described first portion comprises first portion top and first portion bottom, second portion comprises second portion top and second portion bottom, the external diameter on described first portion top and second portion top equates, the external diameter of described first portion bottom is greater than the external diameter of second portion bottom, and the external diameter of second portion bottom is greater than the external diameter on second portion top.
Further, the hollow shape structure that described permanent magnet seat is up/down perforation, the internal face of described permanent magnet seat is step-like structure, and it comprises circular first step and circular second step, described first step is positioned at the outside diameter that the top of second step and the outside diameter of first step are greater than second step, the interior circular diameter of first step equals the outside diameter of second step, the interior circular diameter of second step is identical with the diameter that is opened in the first through hole on permanent magnet seat lower surface, the outside diameter of first step is identical with the diameter that is opened in the second through hole on permanent magnet seat upper surface.
Further; the first portion bottom of described nut is positioned on first step; the upper surface of described first portion bottom is lower than the upper surface of permanent magnet seat; the lower surface of described first portion bottom be positioned at first step place plane top and with alternate separating of plane at first step place, the upper ora terminalis on the first portion top of described nut be positioned at permanent magnet seat upper surface top and do not contact with the lower surface of protection bearing.
Further, described permanent magnet is adhered on second step, and the plane at the upper surface of permanent magnet and first step place is in the same plane, and described permanent magnet is positioned at the below of the first portion bottom of nut.
Further, the position being positioned on the upper surface of described permanent magnet seat around the second through hole is formed with several for permanent magnet seat is installed on to the screw hole on bearing support.
Further, on the lower end surface of described cooling fan, be provided with the through hole that runs through cooling fan upper and lower end face, on the second portion bottom of nut, the position relative with through hole is formed with screw, from the lower end surface of cooling fan through hole with in screw, screw screw with together with cooling fan is mounted on nut.
The present invention has following beneficial effect: the present invention is by an additional permanent magnet below the protection bearing in rotor lower end, by this permanent magnet, the first portion of nut is produced to downward suction F3, thereby make nut produce downward axial suction F3 to rotor, jointly carry out the tensile force f 1 of balance upward direction by the effect of suction F3 and F2, wherein the size of suction F3 depends on the gap between size and nut first portion bottom and the permanent magnet of the permanent magnet corresponding with the lower surface of nut first portion bottom, can effectively reduce axial tension F1 upwards by said method.
Brief description of the drawings:
Fig. 1 is the structural drawing that the present invention can reduce the blower fan of rotor axial power.
Fig. 2 is the local enlarged diagram of Fig. 1.
Fig. 3 is the structural drawing of nut in Fig. 1, permanent magnet and permanent magnet seat.
Fig. 4 is that permanent magnet is arranged at the structural drawing in permanent magnet seat.
Wherein:
1-rotor, 2-cooling fan; 4-bearing bracket; 5-bearing support; 6-protects bearing; 7-thrust magnetic bearing; 8-nut; 9-permanent magnet seat; 10-permanent magnet; 20-through hole; 80-first portion; 81-second portion; 800-first portion top; 801-first portion bottom; 810-second portion top; 811-second portion bottom; 812-screw; 90-first step; 91-second step; 92-screw hole; 93-the first through hole; 94-the second through hole.
Embodiment:
Please refer to shown in Fig. 1 to Fig. 4, blower fan of the present invention comprises rotor 1, be installed on the impeller of end on rotor 1 (not shown), be installed on rotor 1 lower end cooling fan 2, be installed on protection bearing 6 and thrust magnetic bearing 7 on rotor 1 and between impeller and cooling fan 2.Wherein protect bearing 6 to be positioned at the below of thrust magnetic bearing 7, and protect bearing 6 to be installed on bearing support 5, bearing support 5 is installed on bearing bracket 4.
Position on rotor 1 between protection bearing 6 and cooling fan 2 is provided with a nut 8; the upper end face of nut 8 does not contact with the lower surface of protection bearing 6; the rear surface of nut 8 contacts with the upper end face of cooling fan 2, and nut 8 is threaded connection and is installed on rotor 1.Nut 8 comprises first portion 80 and is positioned at the second portion 81 of first portion 80 belows, wherein first portion 80 is up-narrow and down-wide step-like, second portion 81 is also up-narrow and down-wide step-like, first portion 80 comprises first portion top 800 and first portion bottom 801, second portion 81 comprises second portion top 810 and second portion bottom 811, wherein the external diameter on first portion top 800 and second portion top 810 equates, the external diameter of first portion bottom 801 is greater than the external diameter of second portion bottom 811, and the external diameter of second portion bottom 811 is greater than the external diameter on second portion top 810.
Permanent magnet seat 9 is installed below bearing support 5, and the cross section of permanent magnet seat 9 is trapezoidal shape wide at the top and narrow at the bottom, and the permanent magnet seat 9 hollow shape structure that is up/down perforation.The internal face of permanent magnet seat 9 is step-like structure, and it comprises circular first step 90 and circular second step 91, wherein first step 90 is positioned at the outside diameter that the top of second step 91 and the outside diameter of first step 90 are greater than second step 91, the interior circular diameter of first step 90 equals the outside diameter of second step 91, the interior circular diameter of second step 91 is identical with the diameter that is opened in the first through hole 93 on permanent magnet seat 9 lower surfaces, and the outside diameter of first step 90 is identical with the diameter that is opened in the second through hole 94 on permanent magnet seat 9 upper surfaces.Permanent magnet seat 9 is installed on to the periphery of nut 8; and the first portion bottom 801 that makes nut 8 is positioned on first step 90; wherein the upper surface of first portion bottom 801 is lower than the upper surface of permanent magnet seat 9; the lower surface of first portion bottom 801 be positioned at first step 90 places plane top and with alternate separating of plane at first step 90 places, the upper ora terminalis on the first portion top 800 of nut 8 be positioned at permanent magnet seat 9 upper surface top and do not contact with the lower surface of protection bearing 9.Second portion bottom 811 is positioned at the below of the lower surface of permanent magnet seat 9, and the position being positioned on the upper surface of permanent magnet seat 9 around the second through hole 94 is formed with several for permanent magnet seat 9 being installed on to the screw hole 92 on bearing support 5.On second step 91, be coated with and be brushed with one deck glue, by glue, permanent magnet 10 is bonded on second step 91, wherein the plane at the upper surface of permanent magnet 10 and first step 90 places is in the same plane and then make permanent magnet 10 below the lower surface of the first portion bottom 801 of nut 8 and have gap between the upper surface of permanent magnet 10 and the lower surface of the first portion bottom 801 of nut 8.
On the lower end surface of cooling fan 2, be provided with the through hole 20 that runs through cooling fan 2 upper and lower end faces, on the second portion bottom 811 of nut 8, the position relative with through hole 20 is formed with screw 812, from the lower end surface of cooling fan 2 through hole 20 with in screw 812, screw screw so that cooling fan 2 is mounted on nut 8 together with.
The present invention is by an additional permanent magnet below the protection bearing in rotor lower end; by this permanent magnet, the first portion of nut is produced to downward suction F3; thereby make nut produce downward axial suction F3 to rotor; jointly carry out the tensile force f 1 of balance upward direction by the effect of suction F3 and F2; wherein the size of suction F3 depends on the gap between size and nut first portion bottom and the permanent magnet of the permanent magnet corresponding with the lower surface of nut first portion bottom, can effectively reduce axial tension F1 upwards by said method.
The above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, can also make under the premise without departing from the principles of the invention some improvement, and these improve and also should be considered as protection scope of the present invention.
Claims (7)
1. one kind can be reduced the blower fan of rotor axial power, it comprises rotor (1), be installed on the impeller of the upper end of rotor (1), be installed on the cooling fan (2) of rotor (1) lower end, be installed on rotor (1) and be positioned at protection bearing (6) and the thrust magnetic bearing (7) between impeller and cooling fan (2), to protect bearing (6) to be installed on bearing support (5) wherein, bearing support (5) is installed on to bearing bracket (4) wherein, described protection bearing (6) is positioned at the below of thrust magnetic bearing (7), it is characterized in that: the position being positioned on described rotor (1) between protection bearing (6) and cooling fan (2) is threaded connection a nut (8) is installed, one permanent magnet seat (9) is installed in the below of described bearing support (5), the epimere portion of described nut (8) is installed in permanent magnet seat (9) and the upper end edge of nut (8) does not contact with the lower surface of described protection bearing (6), the below of lower surface and the lower end edge of nut (8) that the hypomere portion of described nut (8) is positioned at permanent magnet seat (9) contact with the upper end face of cooling fan (2), in described permanent magnet seat (9) bonding be provided with one with the epimere portion of nut (8) separately and produce the permanent magnet (10) of downward suction for nut (8).
2. a kind of blower fan that can reduce rotor axial power as claimed in claim 1, it is characterized in that: described nut (8) comprises first portion (80) and is positioned at the second portion (81) of first portion (80) below, described first portion (80) is up-narrow and down-wide step-like, second portion (81) is also up-narrow and down-wide step-like, described first portion (80) comprises first portion top (800) and first portion bottom (801), second portion (81) comprises second portion top (810) and second portion bottom (811), the external diameter of described first portion top (800) and second portion top (810) equates, the external diameter of described first portion bottom (801) is greater than the external diameter of second portion bottom (811), and the external diameter of second portion bottom (811) is greater than the external diameter of second portion top (810).
3. a kind of blower fan that can reduce rotor axial power as claimed in claim 2, it is characterized in that: the hollow shape structure that described permanent magnet seat (9) is up/down perforation, the internal face of described permanent magnet seat (9) is step-like structure, and it comprises circular first step (90) and circular second step (91), described first step (90) is positioned at the outside diameter that the top of second step (91) and the outside diameter of first step (90) are greater than second step (91), the interior circular diameter of first step (90) equals the outside diameter of second step (91), the interior circular diameter of second step (91) is identical with the diameter that is opened in the first through hole (93) on permanent magnet seat (9) lower surface, the outside diameter of first step (90) is identical with the diameter that is opened in the second through hole (94) on permanent magnet seat (9) upper surface.
4. a kind of blower fan that can reduce rotor axial power as claimed in claim 3, it is characterized in that: the first portion bottom (801) of described nut (8) is positioned on first step (90), the upper surface of described first portion bottom (801) is lower than the upper surface of permanent magnet seat (9), the lower surface of described first portion bottom (801) be positioned at first step (90) place plane top and with alternate separating of plane at first step (90) place, the upper ora terminalis on the first portion top (800) of described nut (8) be positioned at permanent magnet seat (9) upper surface top and with protection bearing (9) lower surface do not contact.
5. a kind of blower fan that can reduce rotor axial power as claimed in claim 4, it is characterized in that: described permanent magnet (10) is adhered on second step (91), and the plane at the upper surface of permanent magnet (10) and first step (90) place is in the same plane, described permanent magnet (10) is positioned at the below of the first portion bottom (801) of nut (8).
6. a kind of blower fan that can reduce rotor axial power as claimed in claim 5, is characterized in that: the position being positioned on the upper surface of described permanent magnet seat (9) around the second through hole (94) is formed with several for permanent magnet seat (9) being installed on to the screw hole (92) on bearing support (5).
7. a kind of blower fan that can reduce rotor axial power as claimed in claim 6, it is characterized in that: on the lower end surface of described cooling fan (2), be provided with the through hole (20) that runs through cooling fan (2) upper and lower end face, the upper position relative with through hole (20), second portion bottom (811) at nut (8) is formed with screw (812), on the lower end surface of cooling fan (2), screws into screw so that cooling fan (2) and nut (8) are mounted on together in through hole (20) and screw (812).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410385154.7A CN104154028B (en) | 2014-08-06 | 2014-08-06 | A kind of blower fan that can reduce rotor axial power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410385154.7A CN104154028B (en) | 2014-08-06 | 2014-08-06 | A kind of blower fan that can reduce rotor axial power |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104154028A true CN104154028A (en) | 2014-11-19 |
| CN104154028B CN104154028B (en) | 2016-06-29 |
Family
ID=51879619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410385154.7A Withdrawn - After Issue CN104154028B (en) | 2014-08-06 | 2014-08-06 | A kind of blower fan that can reduce rotor axial power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104154028B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107979214A (en) * | 2017-12-28 | 2018-05-01 | 南京磁谷科技有限公司 | The mounting structure of anticollision thrust disc in a kind of magnetic suspension motor rotor |
| CN111089709B (en) * | 2018-10-19 | 2021-04-20 | 华北电力大学 | Multifunctional heavy-load rotor testing device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0530518A1 (en) * | 1991-09-04 | 1993-03-10 | Sulzer Turbo AG | Turbo machine |
| CN103441612A (en) * | 2013-09-02 | 2013-12-11 | 南京磁谷科技有限公司 | Magnetic suspension permanent-magnet synchronous high-power high-speed draught fan |
| US20130343927A1 (en) * | 2012-06-22 | 2013-12-26 | Aktiebolaget Skf | Electric centrifugal compressor for vehicles |
| CN204061282U (en) * | 2014-08-06 | 2014-12-31 | 南京磁谷科技有限公司 | A kind of blower fan that can reduce rotor axial power |
-
2014
- 2014-08-06 CN CN201410385154.7A patent/CN104154028B/en not_active Withdrawn - After Issue
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0530518A1 (en) * | 1991-09-04 | 1993-03-10 | Sulzer Turbo AG | Turbo machine |
| US20130343927A1 (en) * | 2012-06-22 | 2013-12-26 | Aktiebolaget Skf | Electric centrifugal compressor for vehicles |
| CN103441612A (en) * | 2013-09-02 | 2013-12-11 | 南京磁谷科技有限公司 | Magnetic suspension permanent-magnet synchronous high-power high-speed draught fan |
| CN204061282U (en) * | 2014-08-06 | 2014-12-31 | 南京磁谷科技有限公司 | A kind of blower fan that can reduce rotor axial power |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107979214A (en) * | 2017-12-28 | 2018-05-01 | 南京磁谷科技有限公司 | The mounting structure of anticollision thrust disc in a kind of magnetic suspension motor rotor |
| CN111089709B (en) * | 2018-10-19 | 2021-04-20 | 华北电力大学 | Multifunctional heavy-load rotor testing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104154028B (en) | 2016-06-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Blower capable of reducing axial force of rotor Effective date of registration: 20171019 Granted publication date: 20160629 Pledgee: Bank of Beijing, Limited by Share Ltd, Nanjing branch Pledgor: Nanjing CIGU Limited Corporation Registration number: 2017320000042 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20180302 Granted publication date: 20160629 Pledgee: Bank of Beijing, Limited by Share Ltd, Nanjing branch Pledgor: Nanjing CIGU Limited Corporation Registration number: 2017320000042 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Blower capable of reducing axial force of rotor Effective date of registration: 20180322 Granted publication date: 20160629 Pledgee: Bank of Beijing, Limited by Share Ltd, Nanjing branch Pledgor: Nanjing CIGU Limited Corporation Registration number: 2018320000031 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20190424 Granted publication date: 20160629 Pledgee: Bank of Beijing, Limited by Share Ltd, Nanjing branch Pledgor: Nanjing CIGU Limited Corporation Registration number: 2018320000031 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Blower capable of reducing axial force of rotor Effective date of registration: 20190521 Granted publication date: 20160629 Pledgee: Bank of Beijing, Limited by Share Ltd, Nanjing branch Pledgor: Nanjing CIGU Limited Corporation Registration number: 2019320000238 |
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| CP03 | Change of name, title or address |
Address after: No. 99, Jinxin Middle Road, Jiangning District, Nanjing City, Jiangsu Province Patentee after: Nanjing Cigu Technology Co., Ltd Address before: Nine No. 211102 Bamboo Road, Jiangning Development Zone, Nanjing, Jiangsu, 100 Patentee before: NANJING CIGU LIMITED Corp. |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20200615 Granted publication date: 20160629 Pledgee: Bank of Beijing Limited by Share Ltd. Nanjing branch Pledgor: NANJING CIGU Ltd.,Corp. Registration number: 2019320000238 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160629 Effective date of abandoning: 20210317 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20160629 Effective date of abandoning: 20210317 |
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| AV01 | Patent right actively abandoned |