CN204061282U - A kind of blower fan that can reduce rotor axial power - Google Patents
A kind of blower fan that can reduce rotor axial power Download PDFInfo
- Publication number
- CN204061282U CN204061282U CN201420442410.7U CN201420442410U CN204061282U CN 204061282 U CN204061282 U CN 204061282U CN 201420442410 U CN201420442410 U CN 201420442410U CN 204061282 U CN204061282 U CN 204061282U
- Authority
- CN
- China
- Prior art keywords
- permanent magnet
- nut
- bearing
- magnet seat
- 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.)
- Withdrawn - After Issue
Links
Landscapes
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The utility model discloses a kind of blower fan that can reduce rotor axial power, belongs to field of mechanical technique.Blower fan comprises rotor, be installed on the impeller of end on rotor, be installed on the cooling fan of rotor lower end, be installed on epitrochanterian and protection bearing between impeller and cooling fan and thrust magnetic bearing, protection bearing is installed on bearing support wherein, bearing support is installed on bearing bracket wherein, protection bearing is positioned at below thrust magnetic bearing, position on rotor between protection bearing and cooling fan is connected and installed with a nut, one permanent magnet seat is installed in the below of bearing support, the epimere portion of nut is installed in permanent magnet seat and the upper end edge of nut does not contact with the lower surface of protection bearing, the hypomere portion of nut is positioned at the below of the lower surface of permanent magnet seat and the lower end edge of nut contacts with the upper end face of cooling fan, in permanent magnet seat bonding be provided with the epimere portion of nut separately and produce the permanent magnet of downward suction for nut.
Description
Technical field:
The utility model relates to a kind of blower fan that can reduce rotor axial power, and it belongs to field of mechanical technique.
Background technique:
Rotor is the core component of blower fan.When fan operation, the impeller of rotor upper end, owing to being subject to the effect of aerodynamic force, whole rotor will be caused to bear the tensile force f 1 of a upward direction, and the value of this power F1 is very large.In order to balance this pulling force upwards, thrust magnetic bearing in blower fan can produce a downward suction F2 to rotor, if F2 to be used for complete equilibrium tensile force f 1 upwards, the operating current of thrust magnetic bearing will be caused bigger than normal, so can affect its working stability for a long time, have potential safety hazard.Therefore, need to consider that otherwise assists the impact eliminating this tensile force f 1, or at least offset a part, make to protect the operating current of bearing to reduce.
Model utility content:
The utility model, for solving above-mentioned prior art problem, provides a kind of blower fan that can reduce rotor axial power.
The utility model 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 epitrochanterian and protection bearing between impeller and cooling fan and thrust magnetic bearing, protection bearing is installed on bearing support wherein, bearing support is installed on 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 and is provided with a nut, one permanent magnet seat is installed in the below of 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 hypomere portion of described nut is positioned at the below of the lower surface of permanent magnet seat and the lower end edge of nut contacts 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 below first portion, 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 is equal, 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, described permanent magnet seat is the hollow shape structure of 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 top of second step and the outside diameter of first step is greater than the outside diameter of 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 of the first through hole be opened on permanent magnet seat lower surface, the outside diameter of first step is identical with the diameter of the second through hole be opened 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 is positioned at the top of the plane at first step place and alternately with the plane at first step place separates, and the upper edge on the first portion top of described nut is positioned at the top of the upper surface of permanent magnet seat and does 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, on the upper surface of described permanent magnet seat, the position be positioned at around the second through hole is formed with several for permanent magnet seat being installed on the screw hole on bearing support.
Further, the lower end surface of described cooling fan is provided with the through hole running 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, on the lower end surface of cooling fan through hole with screw screw in screw with together with being mounted on nut by cooling fan.
The utility model has following beneficial effect: the utility model is by the additional one piece of permanent magnet in the below of the protection bearing in rotor lower end, downward suction F3 is produced by the first portion of this permanent magnet to nut, thus make nut produce downward axial suction F3 to rotor, the tensile force f 1 of upward direction is jointly balanced by the effect of suction F3 and F2, wherein the size of suction F3 depends on the size of permanent magnet corresponding with the lower surface of nut first portion bottom and the gap between nut first portion bottom and permanent magnet, axial tension F1 upwards can be effectively reduced by said method.
Accompanying drawing illustrates:
Fig. 1 is the structural drawing that the utility model can reduce the blower fan of rotor axial power.
Fig. 2 is the close-up schematic view of Fig. 1.
Fig. 3 is the structural drawing of nut in Fig. 1, permanent magnet and permanent magnet seat.
Fig. 4 is the structural drawing that permanent magnet is arranged 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-first through hole; 94-second through hole.
Embodiment:
Please refer to shown in Fig. 1 to Fig. 4, the utility model blower fan comprises rotor 1, be installed on the impeller of end on rotor 1 (not shown), be installed on the cooling fan 2 of rotor 1 lower end, be installed on rotor 1 and protection bearing 6 between impeller and cooling fan 2 and thrust magnetic bearing 7.Wherein protect bearing 6 to be positioned at the below of thrust magnetic bearing 7, and protection bearing 6 is 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 below first portion 80, 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 is equal, 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.
Be provided with permanent magnet seat 9 in the below of bearing support 5, the cross section of permanent magnet seat 9 is trapezoidal shape wide at the top and narrow at the bottom, and permanent magnet seat 9 is the hollow shape structure of 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 top of second step 91 and the outside diameter of first step 90 is greater than the outside diameter of 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 of the first through hole 93 be opened on permanent magnet seat 9 lower surface, and the outside diameter of first step 90 is identical with the diameter of the second through hole 94 be opened on permanent magnet seat 9 upper surface.Permanent magnet seat 9 is installed on the periphery of nut 8; and make the first portion bottom 801 of nut 8 be 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 is positioned at the top of the plane at first step 90 place and alternately with the plane at first step 90 place separates, and the upper edge on the first portion top 800 of nut 8 is positioned at the top of the upper surface of permanent magnet seat 9 and does 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 upper surface of permanent magnet seat 9 is positioned at around the second through hole 94 is formed with several for permanent magnet seat 9 being installed on the screw hole 92 on bearing support 5.Second step 91 is coated with and is brushed with one deck glue, by glue, permanent magnet 10 is bonded on second step 91, wherein the upper surface of permanent magnet 10 and the plane at first step 90 place in the same plane and then make permanent magnet 10 in the below of the lower surface of the first portion bottom 801 of nut 8 and there is gap between the lower surface of the first portion bottom 801 of the upper surface of permanent magnet 10 and nut 8.
The lower end surface of cooling fan 2 is provided with the through hole 20 running through cooling fan 2 upper and lower end face, on the second portion bottom 811 of nut 8, the position relative with through hole 20 is formed with screw 812, on the lower end surface of cooling fan 2 at through hole 20 together with screwing screw in screw 812 and then be mounted on nut 8 by cooling fan 2.
The utility model is by the additional one piece of permanent magnet in the below of the protection bearing in rotor lower end; downward suction F3 is produced by the first portion of this permanent magnet to nut; thus make nut produce downward axial suction F3 to rotor; the tensile force f 1 of upward direction is jointly balanced by the effect of suction F3 and F2; wherein the size of suction F3 depends on the size of permanent magnet corresponding with the lower surface of nut first portion bottom and the gap between nut first portion bottom and permanent magnet, can effectively reduce axial tension F1 upwards by said method.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art, can also make some improvement under the prerequisite not departing from the utility model principle, these improvement also should be considered as protection domain of the present utility model.
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 the protection bearing (6) be positioned between impeller and cooling fan (2) and thrust magnetic bearing (7), bearing (6) will be protected to be installed on bearing support (5) wherein, bearing support (5) is installed on 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 be positioned on described rotor (1) between protection bearing (6) and cooling fan (2) is threaded connection and is provided with a nut (8), 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 hypomere portion of described nut (8) is positioned at the below of the lower surface of permanent magnet seat (9) and the lower end edge of nut (8) contacts 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 for 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) is equal, 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 top of second step (91) and the outside diameter of first step (90) is greater than the outside diameter of 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 of the first through hole (93) be opened on permanent magnet seat (9) lower surface, the outside diameter of first step (90) is identical with the diameter of the second through hole (94) be opened 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) is positioned at the top of the plane at first step (90) place and alternately with the plane at first step (90) place separates, the upper edge on the first portion top (800) of described nut (8) is positioned at the top of the upper surface of permanent magnet seat (9) and does not contact with the lower surface of protection bearing (9).
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: on the upper surface of described permanent magnet seat (9), the position be positioned at around the second through hole (94) is formed with several for permanent magnet seat (9) being installed on 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) running through cooling fan (2) upper and lower end face, in the second portion bottom (811) of nut (8), the upper position relative with through hole (20) is formed with screw (812), screws into screw cooling fan (2) and nut (8) to be mounted on together on the lower end surface of cooling fan (2) in through hole (20) and screw (812).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420442410.7U CN204061282U (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 |
|---|---|---|---|
| CN201420442410.7U CN204061282U (en) | 2014-08-06 | 2014-08-06 | A kind of blower fan that can reduce rotor axial power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204061282U true CN204061282U (en) | 2014-12-31 |
Family
ID=52202809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420442410.7U Withdrawn - After Issue CN204061282U (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) | CN204061282U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154028A (en) * | 2014-08-06 | 2014-11-19 | 南京磁谷科技有限公司 | Blower capable of reducing axial force of rotor |
-
2014
- 2014-08-06 CN CN201420442410.7U patent/CN204061282U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154028A (en) * | 2014-08-06 | 2014-11-19 | 南京磁谷科技有限公司 | Blower capable of reducing axial force of rotor |
| CN104154028B (en) * | 2014-08-06 | 2016-06-29 | 南京磁谷科技有限公司 | A kind of blower fan that can reduce rotor axial power |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104154028B (en) | A kind of blower fan that can reduce rotor axial power | |
| CN204061282U (en) | A kind of blower fan that can reduce rotor axial power | |
| CN202032172U (en) | Fixing device for data wires or electric wires | |
| CN204942054U (en) | A kind of main machine structure preventing dust from directly entering bearing | |
| CN204253432U (en) | A kind of detaching structure for constant-pressure tangent pump impeller | |
| CN207719911U (en) | A kind of magnetic suspension motor rotor assembly | |
| CN203783979U (en) | Fan blade support of micromotor | |
| CN204231824U (en) | Fixed mount and electronic equipment | |
| CN204942098U (en) | A kind of mechanical structure preventing dust from directly entering bearing | |
| CN201975664U (en) | Mica sheet of insert piece type reverser | |
| CN204068477U (en) | Pure iron mortice lock is tightly fixed on epitrochanterian structure by one | |
| CN203906366U (en) | Anti-separation rotating shaft of micromotor fan blade bracket | |
| CN204334149U (en) | A kind of magneto tandem rotor | |
| CN203632463U (en) | Brushless power motor of efficient all-weather aircraft | |
| CN202813715U (en) | Air conditioner installation support | |
| CN203982734U (en) | LED display module is the elasticity magnetic post of use fixedly | |
| CN207638574U (en) | High current rectifying disc insulation system for high-voltage generator | |
| CN204098290U (en) | A kind of ripple curtain wall briquetting | |
| CN203205362U (en) | Connecting structure of pedestal and handle of circuit breaker | |
| CN202241112U (en) | Motor pulley gear puller of oil-pumping unit | |
| CN204942002U (en) | A kind of Novel submersible pump | |
| CN202798339U (en) | Low-wind-noise motor | |
| CN105222298A (en) | Fan coil units drags multiple-motor mechanism with one | |
| CN202125468U (en) | Dismounting mechanism of draught fan impellers | |
| CN203297367U (en) | Dustproof bearing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141231 Effective date of abandoning: 20160629 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |