CN106411026B - A kind of Miniature digital direct current generator - Google Patents
A kind of Miniature digital direct current generator Download PDFInfo
- Publication number
- CN106411026B CN106411026B CN201610925660.XA CN201610925660A CN106411026B CN 106411026 B CN106411026 B CN 106411026B CN 201610925660 A CN201610925660 A CN 201610925660A CN 106411026 B CN106411026 B CN 106411026B
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- Prior art keywords
- fan
- circle
- end cover
- ball grooves
- twice
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of Miniature digital direct current generator, including electric machine casing and to be set to motor casing intracorporal stator assembly and rotor assembly.Rotor assembly includes the shaft for being equipped with impeller and rotor；The inside of electric machine casing is formed with the end cover of fan being integrally connected with electric machine casing, and the middle part of end cover of fan has the axle hole of installation shaft；Impeller is located at the outside of end cover of fan, and the guide vane around impeller is integrally formed on end cover of fan；The edge of end cover of fan and the side wall of electric machine casing, which have, to be spaced and constitutes air duct, guide vane is in involute arc, the outer wall of one end and end cover of fan is integrally connected, and the inner sidewall of the other end across air duct and electric machine casing is integrally connected, and the wind guide channel being connected with air duct is formed between guide vane separately.The present invention uses the wind-guiding chip architecture being made into integration with end cover of fan, optimizes the air output in air duct, improves the working efficiency of impeller, and pneumatic noise can be effectively reduced.
Description
Technical field
The present invention relates to a kind of motor, specifically a kind of Miniature digital direct current generator.
Background technique
The rotor assembly of direct current generator may include impeller, and the impeller is relative to the cover rotation being fixed in turbine.Direct current
Motor is mainly used for dust catcher, hand dryer etc. as vacuumizing driving source, the motor part revolving speed of turbine can be up to 50,000 to
100000 rpm.Very high to the required precision of rotor assembly under this high revolving speed, the bearing of rotor assembly is difficult during rotation
Exempt to have and jump, rotor assembly will lead to vibration of the impeller relative to cover since unbalanced power shakes, and generate noise.
The patent of invention that number of patent application is 201280041747.0 discloses a kind of rotor assembly, which includes
Axis, bearing assembly, impeller and cover, the impeller and bearing assembly are mounted to axis, and the cover is mounted to bearing assembly to cover
Lid impeller.It is installed in bearing assembly that will cover, impeller is rotated freely through relative to cover.Since cover forms one of rotor assembly
Point, the displacement of the impeller as caused by the vibration of rotor assembly along with cover displacement.It is not examining in gap between impeller and cover
It is kept in the case where the vibration for considering rotor assembly.As a result, less noise is generated by rotor assembly during operation.Cover is pacified
Bearing assembly is attached to also allow for establishing the gap well limited between impeller and cover.Particularly, gap can not be by turbine
The installation or alignment of rotor assembly in machine influence.
As shown in Figure 1,91 component of bearing of the patent disclosure may include a pair of bearing spaced apart surrounded by sleeve 9
91.This, which is covered in, is mounted to sleeve 9, and sleeve 9 provides relatively large surface, and covering in is to be mounted on a surface.Relatively
Good fixation can be formed between 91 component of cover and bearing.Additionally, the bearing 91 spaced apart surrounded by sleeve 9 is arranged
The rigidity for increasing rotor assembly is applied, and then leads to higher first flexure frequency.Therefore, which can make more
It is operated at high subcritical speed.
The prior art of the patent disclosure, due to inevitably there is dress between bearing inner race, bearing outer ring and ball
With gap, under tens of thousands of turns of high speed rotation, which plays very big influence to the stability of rotor.In the prior art,
In order to eliminate the influence of bearing inner race and bearing outer ring, keep stability under rotor high speed and mute, two bearings 91 in addition to
It is surrounded outside by sleeve 9, also spring 92 is assembled between two bearings 91, between the outer ring that two bearings 91 are made by spring 92
There are repulsion, to offset the power that jumps of a part.Although the prior art greatly improves the performance of rotor at high speeds, but
Assembling structure is complicated, and eliminates the influence that jumps by spring force, has certain scope of application, when load is more than spring force still
It will affect the stability of shaft.
Summary of the invention
The present invention is directed to direct current generator in the prior art under high-speed rotation the technical issues of impeller air draught low efficiency, and
A kind of Miniature digital direct current generator is provided, the air draught flow of impeller is improved by improving wind-guiding chip architecture.
The technical scheme of the invention to solve the technical problem is: a kind of Miniature digital direct current generator, including electricity
Casing body and be set to motor casing it is intracorporal stator assembly and rotor assembly.Rotor assembly includes turn for being equipped with impeller and rotor
Axis；The inside of electric machine casing is formed with the end cover of fan being integrally connected with electric machine casing, and the middle part of end cover of fan has installation shaft
Axle hole；Impeller is located at the outside of end cover of fan, and the guide vane around impeller is integrally formed on end cover of fan；End cover of fan
The side wall of edge and electric machine casing, which has, to be spaced and constitutes air duct, and guide vane is in involute arc, one end and end cover of fan it is outer
Wall is integrally connected, and the inner sidewall of the other end across air duct and electric machine casing is integrally connected, between guide vane separately formed with
The connected wind guide channel in air duct.
To optimize above-mentioned technical proposal, the invention also includes following improved technical solutions.
Above-mentioned impeller has bottom plate and upper cover, and the center of upper cover is formed with the air inlet to raise upward, bottom plate and upper cover it
Between be fixed with rotating vane, rotating vane is being distributed in air inlet periphery.
Above-mentioned end cover of fan is formed with 15 to 19 guide vanes being integrally connected；The minimum interval of rotating vane and guide vane
Distance is less than or equal to 0.4mm.
The end of above-mentioned guide vane extends into air duct and is connected with the sidewall of motor housing in air duct；Each guide vane
It is equidistantly arranged on the outer wall of end cover of fan, entrance of the wind guide channel close to rotating vane and the exit width phase close to air duct
Together.
In order to simplify the structure of revolute pair, avoids shaft caused by prior art middle (center) bearing from jumping and shake, improve rotor
Stability and quietness of the component under high-speed rotation, the appearance face interval of above-mentioned shaft are formed with the first ball of twice annular
Slot, the outer cover of shaft are equipped with the installation set for surrounding the first ball grooves of twice, and it is corresponding that the inner wall interval of installation set is formed with twice
Second ball grooves are equipped with a circle ball between the first ball grooves and the second ball grooves.
Retainer is equipped between above-mentioned installation set and shaft, retainer has the interval body for separating each ball.
The first axis section of above-mentioned first ball grooves and the second axial cross section of the second ball grooves are respectively arc surface；The
The radius of the radius of one axial cross section and the second axial cross section is respectively greater than the radius of ball.
The center of circle in any first above-mentioned circular arc center of circle of side, the second circular arc center of circle and ball interlaces out.
The first circular arc distance of center circle between above-mentioned the first ball grooves of twice is greater than the second circle between the second ball grooves of twice
Arc distance of center circle, and the second circular arc center of circle of the second ball grooves of twice is located between the first circular arc center of circle of the first ball grooves of twice.
The first circular arc distance of center circle between above-mentioned the first ball grooves of twice is less than the second circle between the second ball grooves of twice
Arc distance of center circle, and the first circular arc center of circle of the first ball grooves of twice is located between the second circular arc center of circle of the second ball grooves of twice.
Compared with prior art, a kind of Miniature digital direct current generator of the invention, using what is be made into integration with end cover of fan
Wind-guiding chip architecture optimizes the air output in air duct, improves the working efficiency of impeller, and pneumatic noise can be effectively reduced.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of shaft in the prior art.
Fig. 2 is the structural schematic diagram of shaft in the present invention.
Fig. 3 is the B-B direction sectional view of Fig. 2.
Fig. 4 is the portion the A partial enlargement diagram in Fig. 3.
Fig. 5 is assembling decomposition diagram of the invention.
Fig. 6 is the schematic diagram of the section structure of the invention.
Fig. 7 is the C-C of Fig. 6 to sectional view.
Fig. 8 is the structural schematic diagram of guide vane in Fig. 5.
Specific embodiment
The embodiment of the present invention is described in further detail below in conjunction with attached drawing.
Fig. 1 to Fig. 8 show structural schematic diagram of the invention.
Appended drawing reference therein are as follows: shaft 1, the first ball grooves 1a, first axis section 1b, the first circular arc center of circle 1c, rolling
Pearl 11, installation set 2, the second ball grooves 2a, the second axial cross section 2b, the second circular arc center of circle 2c, retainer 3, impeller 4, bottom plate 41,
Upper cover 42, air inlet 42a, rotating vane 43, electric machine casing 5, end cover of fan 51, axle hole 51a, guide vane 52, wind guide channel 53,
Air duct 54, sleeve 9, bearing 91, spring 92.
A kind of Miniature digital direct current generator of the invention, the stator pack including electric machine casing 5 and in electric machine casing 5
Part and rotor assembly.Rotor assembly includes the shaft 1 for being equipped with impeller 4 and rotor.
The inside of electric machine casing 5 is formed with the end cover of fan 51 being integrally connected with electric machine casing 5, the middle part tool of end cover of fan 51
There is the axle hole 51a of installation shaft 1.Shaft 1 passes through end cover of fan 51, and is rotatably installed in the 51a of axle hole.
Impeller 4 is located at the outside of end cover of fan 51, and the guide vane 52 around impeller 4 is integrally formed on end cover of fan 51.Wind
The side wall of the edge of generator terminal lid and electric machine casing 5, which has, is spaced and constitutes air duct 54, and guide vane 52 is in involute arc, one end with
The outer wall of end cover of fan 51 is integrally connected, and the other end is integrally connected across air duct 54 and the inner sidewall of electric machine casing 5, separately
The wind guide channel 53 being connected with air duct 54 is formed between guide vane 52.
Impeller 4 has bottom plate 41 and upper cover 42, and the center of upper cover 42 is formed with the air inlet 42a to raise upward, 41 He of bottom plate
Rotating vane 43 is fixed between upper cover 42, rotating vane 43 is being distributed in the periphery air inlet 42a.Shaft 1 can be with impeller 4
With tens of thousands of rpms of high speed rotation, impeller 4 is sucked air-flow from air inlet 42a by rotating vane 43, and by air-flow to
The wind guide channel 53 of 4 periphery of impeller is discharged.
51 outer wall of end cover of fan is formed with 15 to 19 guide vanes 52 being integrally connected.The quantity of guide vane 52 is preferably 17
A, the minimum separation distances of rotating vane 43 and guide vane 52 are less than or equal to 0.4mm.During guide vane 52 with the axle center of shaft 1 is
The heart is symmetrical, and the radian of each guide vane 52 is in involute, and air-flow can quickly be guided to be discharged from air duct 54, reduces air-flow
Sound improves air-flow and passes through efficiency.
When 4 high speed rotation of impeller, air stream enters impeller 4 from air inlet 42a, is discharged into wind guide channel by rotating vane 43
53.Rotating vane 43 and the spacing distance of guide vane 52 are smaller, and pneumatic noise is smaller, while air mass flow can be improved.
The end of guide vane 52 extends into air duct 54 and is connected with 5 side wall of electric machine casing in air duct 54.It is each to lead
Wind piece 52 is equidistantly arranged on the outer wall of end cover of fan 51, and wind guide channel 53 is close to the entrance of rotating vane 43 and close to air duct 54
Exit width it is identical.
It is formed with the first ball grooves 1a of twice annular in the appearance face interval of shaft 1, the outer cover of shaft 1, which is equipped with, surrounds two
The installation set 2 of road the first ball grooves 1a, the inner wall interval of installation set 2 are formed with the corresponding second ball grooves 2a of twice, in the first rolling
A circle ball 11 is equipped between pearl slot 1a and the second ball grooves 2a.In the present invention, shaft 1 and installation set 2 directly constitute revolute pair,
It does not need to install bearing additional between.Two circle balls 11 are separately positioned between twice the first ball grooves 1a and the second ball grooves 2a,
Since shaft 1 and installation set 2 are all rigid bodies, constrain two circle balls 11 in the stability of high-speed rotation process, greatly improve
The high speed running performance of shaft 1, and reduce noise etc. and influence.
Retainer 3 is equipped between installation set 2 and shaft 1.The ontology of retainer 3 is annular, has on annular solid and separates
The interval body of each ball 11.Retainer 3 is packed into from the both ends of installation set 2, is fixed with closing set again in the end of installation set 2.
The second axial cross section 2b of the first axis section 1b of first ball grooves 1a and the second ball grooves 2a is respectively circular arc
Face.The radius of the radius of first axis section 1b and the second axial cross section 2b are respectively greater than the radius of ball 11.
Any side the first circular arc center of circle 1c, the second circular arc center of circle 2c and ball 11 the center of circle interlace out.
In a preferred embodiment, the first circular arc distance of center circle between the first ball grooves of twice 1a is rolled greater than twice second
The second circular arc distance of center circle between pearl slot 2a, and the second circular arc center of circle 2c of the second ball grooves of twice 2a is located at the first ball of twice
Between the first circular arc center of circle 1c of slot 1a.Therefore, any the first circular arc of side center of circle 1c, the second circular arc center of circle 2c and ball 11
The center of circle is staggered.
In the present invention, since shaft 1 and installation set 2 are all an entirety, two circle balls 11 directly with shaft 1 and installation set
2 match.As shown in figure 4, the second circular arc circle of the first circular arc center of circle 1c and the second ball grooves 2a of the first ball grooves of twice 1a
Heart 2c is not overlapped.So being and the first rolling when the ball 11 on right side is packed between the first ball grooves 1a and the second ball grooves 2a
The left side of pearl slot 1a matches, while matching with the right side of the second ball grooves 2a, while the ball 11 in left side is exactly
Symmetrically.Since the center of circle at two circle balls 11 is not overlapped, meeting nature generates the restraining force to centre under high-speed rotation, with
Payment load or external environment cause
Although 11 radius of radius ratio ball of the first ball grooves 1a and the second ball grooves 2a is big, there are fit-up gaps.But
Ball 11 can still eliminate the influence of fit-up gap after being packed into, closely match with the first ball grooves 1a and the second ball grooves 2a automatically
It closes.In this way, when shaft 1 is relative to 2 high-speed rotation of installation set, the leaping up in the axial direction of shaft 1 is can be effectively prevented in two circle balls 11
Dynamic and shaking radially.
In another preferred embodiment, the first circular arc distance of center circle between the first ball grooves of twice 1a can be less than two
The second circular arc distance of center circle between road the second ball grooves 2a, and the first circular arc center of circle 1c of the first ball grooves of twice 1a is located at twice
Between the second circular arc center of circle 2c of second ball grooves 2a.In this embodiment, the first circular arc center of circle 1c of any side, second
Circular arc center of circle 2c is same as the center of circle of ball 11 to be staggered.
Highly preferred embodiment of the present invention has illustrated, and the various change or remodeling made by those of ordinary skill in the art are not
It can depart from the scope of the present invention.
Claims (7)
1. a kind of Miniature digital direct current generator including electric machine casing (5) and the stator module being set in electric machine casing (5) and turns
Sub-component, it is characterized in that: the rotor assembly includes the shaft (1) for being equipped with impeller (4) and rotor；The electric machine casing
(5) inside is formed with the end cover of fan (51) being integrally connected with electric machine casing (5), and the middle part of the end cover of fan (51) has peace
Fill the axle hole (51a) of the shaft (1)；The impeller (4) is located at the outside of end cover of fan (51), the end cover of fan
(51) guide vane (52) around impeller (4) is integrally formed on；The edge of the end cover of fan (51) and the side of electric machine casing (5)
Wall, which has, to be spaced and constitutes air duct (54), and the guide vane (52) is in involute arc, and one end is outer with end cover of fan (51)
Wall is integrally connected, and the other end is integrally connected across the air duct (54) and the inner sidewall of electric machine casing (5), guide vane separately
(52) wind guide channel (53) being connected with air duct (54) is formed between；The appearance face interval of the shaft (1) is formed with twice annular
First ball grooves (1a), the outer cover of the shaft (1) are equipped with the installation set (2) for surrounding first ball grooves of twice (1a),
The inner wall interval of the installation set (2) is formed with corresponding second ball grooves (2a) of twice, first ball grooves (1a) with
Circle ball (11) is equipped between second ball grooves (2a)；The first axis section (1b) and second of first ball grooves (1a)
The second axial cross section (2b) of ball grooves (2a) is respectively arc surface；The radius of the first axis section (1b) and second is axially
The radius in section (2b) is respectively greater than the radius of ball (11)；The first circular arc circle in first axis section (1b) described in any side
The center of circle of the heart (1c), the second circular arc center of circle (2c) of the second axial cross section (2b) and ball (11) interlaces out.
2. a kind of Miniature digital direct current generator according to claim 1, it is characterized in that: the impeller (4) has bottom plate
(41) and upper cover (42), the center of the upper cover (42) is formed with the air inlet (42a) to raise upward, the bottom plate (41) and upper
It is fixed with rotating vane (43) between lid (42), the rotating vane (43) is distributed in air inlet (42a) periphery.
3. a kind of Miniature digital direct current generator according to claim 2, it is characterized in that: the end cover of fan (51) is formed with
15 to 19 guide vanes (52) being integrally connected；Rotating vane (43) and the minimum separation distances of guide vane (52) are less than or equal to
0.4mm。
4. a kind of Miniature digital direct current generator according to claim 3, it is characterized in that: the end of the guide vane (52) to
Extend in the air duct (54) and is connected with electric machine casing (5) side wall in air duct (54)；Each guide vane (52)
It is equidistantly arranged on the outer wall of end cover of fan (51), the wind guide channel (53) is close to the entrance of rotating vane (43) and close to wind
The exit width in road (54) is identical.
5. a kind of Miniature digital direct current generator according to claim 1, it is characterized in that: the first ball grooves of the twice (1a)
Between the first circular arc distance of center circle be greater than the second circular arc distance of center circle between the second ball grooves of twice (2a), and the second ball of twice
The second circular arc center of circle (2c) of slot (2a) is located between the first circular arc center of circle (1c) of the first ball grooves of twice (1a).
6. a kind of Miniature digital direct current generator according to claim 1, it is characterized in that: the first ball grooves of the twice (1a)
Between the first circular arc distance of center circle be less than the second circular arc distance of center circle between the second ball grooves of twice (2a), and the first ball of twice
The first circular arc center of circle (1c) of slot (1a) is located between the second circular arc center of circle (2c) of the second ball grooves of twice (2a).
7. a kind of Miniature digital direct current generator according to claim 1, it is characterized in that: the installation set (2) and shaft
(1) retainer (3) are equipped between, the retainer (3) has the interval body for separating each ball (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610925660.XA CN106411026B (en) | 2016-10-24 | 2016-10-24 | A kind of Miniature digital direct current generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610925660.XA CN106411026B (en) | 2016-10-24 | 2016-10-24 | A kind of Miniature digital direct current generator |
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| Publication Number | Publication Date |
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| CN106411026A CN106411026A (en) | 2017-02-15 |
| CN106411026B true CN106411026B (en) | 2019-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610925660.XA Active CN106411026B (en) | 2016-10-24 | 2016-10-24 | A kind of Miniature digital direct current generator |
Country Status (1)
| Country | Link |
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| CN (1) | CN106411026B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108306453B (en) * | 2018-03-02 | 2023-09-01 | 追觅创新科技(苏州)有限公司 | Motor and blower |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201771833U (en) * | 2010-08-23 | 2011-03-23 | 湖北飞剑泵业有限公司 | Water-proof coupling bearing for water pump |
| CN203691122U (en) * | 2013-12-26 | 2014-07-02 | 东明机电（深圳）有限公司 | Dust collector motor provided with wind-guiding disc |
| CN203933219U (en) * | 2014-06-12 | 2014-11-05 | 莱克电气股份有限公司 | A kind of end cap of motor of dust collector |
| CN105587773A (en) * | 2016-02-23 | 2016-05-18 | 安徽省宁国顺昌机械有限公司 | High-hardness bearing |
| CN206211737U (en) * | 2016-10-24 | 2017-05-31 | 宁波纽新克电机股份有限公司 | A kind of Miniature digital direct current generator |
-
2016
- 2016-10-24 CN CN201610925660.XA patent/CN106411026B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201771833U (en) * | 2010-08-23 | 2011-03-23 | 湖北飞剑泵业有限公司 | Water-proof coupling bearing for water pump |
| CN203691122U (en) * | 2013-12-26 | 2014-07-02 | 东明机电（深圳）有限公司 | Dust collector motor provided with wind-guiding disc |
| CN203933219U (en) * | 2014-06-12 | 2014-11-05 | 莱克电气股份有限公司 | A kind of end cap of motor of dust collector |
| CN105587773A (en) * | 2016-02-23 | 2016-05-18 | 安徽省宁国顺昌机械有限公司 | High-hardness bearing |
| CN206211737U (en) * | 2016-10-24 | 2017-05-31 | 宁波纽新克电机股份有限公司 | A kind of Miniature digital direct current generator |
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| Publication number | Publication date |
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| CN106411026A (en) | 2017-02-15 |
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Address after: 315100 Zhejiang city of Ningbo province Yinzhou District Jingu Road No. 219 Patentee after: Ningbo Newark Electric Co., Ltd Address before: 315100 Zhejiang city of Ningbo province Yinzhou District Jingu Road No. 219 Patentee before: Ningbo new G motor Limited by Share Ltd |