CN106300745A - There is I-shaped cross-section linear type and the ventilation structure of streamlined channel-section steel - Google Patents
There is I-shaped cross-section linear type and the ventilation structure of streamlined channel-section steel Download PDFInfo
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- CN106300745A CN106300745A CN201610777163.XA CN201610777163A CN106300745A CN 106300745 A CN106300745 A CN 106300745A CN 201610777163 A CN201610777163 A CN 201610777163A CN 106300745 A CN106300745 A CN 106300745A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
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Abstract
The present invention relates to a kind of ventilation structure with I-shaped cross-section linear type and streamlined channel-section steel, mainly include Radial ventilation duct, rotor tooth, axial ventilation road, rotor core and channel-section steel.Rotor core is the most uniformly divided into several sections, a fixed gap is left between adjacent rotor iron core, form Radial ventilation duct, the rotor tooth one_to_one corresponding in the axial direction that adjacent segmented rotor is unshakable in one's determination, channel-section steel is positioned in Radial ventilation duct and circumferentially, and be arranged between the rotor tooth of adjacent sectional rotor core, an I-shaped cross-section linear type channel-section steel and two streamlined channel-section steels in I-shaped cross-section it are placed with between each rotor tooth of adjacent sectional rotor core, rotor core is slotted at rotating shaft, form axial ventilation road, path is provided for cooling medium flowing, structure of the present invention can improve the circulation path of cooling medium in rotor, promote cooling medium flow efficiency, reach more preferable cooling effect.
Description
Technical field
The present invention relates to a kind of ventilation structure with I-shaped cross-section linear type and streamlined channel-section steel, belong to motor
Aeration technology and manufacture and design field.
Background technology
In high power density motor internal, electric machine rotor iron core segmentation, between stack of lamination, form radial ducts, included groove
Steel, plays the effect of support member.Meanwhile, during electric machine rotation, rotor ventilation channel-section steel can play to a certain extent
The effect of fan, and cooling medium flow behavior can be improved.China Patent No. is the work shape described in 201320330289.4
Cross section channel-section steel, can effectively promote intensity, but not take into full account that channel-section steel changes the effect of gas flowing；China Patent No. is
Many replicated structures channel-section steel described in 201420848187.6, beats the boundary region between the cooling gas flowing through brokenly air duct, increases
Area of dissipation, but junction windage easily forms eddy current relatively greatly.Above two channel-section steel structure all fails efficiently to utilize leading of channel-section steel
Fluidity energy and pectinid performance.
Summary of the invention
The technology of the present invention solves problem: overcome existing motor to cause owing to rotor ventilation channel-section steel utilization rate is the highest
The problem of ventilation effect difference, proposes effectively to promote the aeration structure of rotor wind dispelling ability, makes motor internal cooling medium flowing effect
Rate improves relatively, and cooling effect makes moderate progress.
The technical solution of the present invention is: have the rotor ventilation knot of I-shaped cross-section linear type and streamlined channel-section steel
Structure, mainly includes Radial ventilation duct (1), rotor tooth (2), axial ventilation road (3), rotor core (4) and channel-section steel (5).Rotor
(4) unshakable in one's determination are the most uniformly divided into several sections, and hop count n length D axial with rotor is relevant, i.e. n=5.3 × 10-3D～4.8 ×
10-3D.Adjacent rotor leaves a fixed gap between (4) unshakable in one's determination, forms Radial ventilation duct (1), the axial width of Radial ventilation duct (1)
Degree L and rotor internal diameter R1, rotor diameter R2Relevant with axial length D, i.e. L=[(D-3R2+3R1)/150]2～[(D-3R2+
3R1)/130]2.Rotor tooth (2) one_to_one corresponding in the axial direction of adjacent segmented rotor (4) unshakable in one's determination, channel-section steel (5) is positioned at the most logical
In wind ditch (1) and circumferentially, and be arranged between the rotor tooth (2) of adjacent sectional rotor core (4), adjacent sectional rotor
Being placed with three channel-section steels (5) between each rotor tooth (2) of (4) unshakable in one's determination, rotor core (4) is slotted at rotating shaft, forms axle
To ventilating duct (3), providing path for cooling medium flowing, wherein, axial ventilation road (3) Cross section Design be circular, diameter of phi and
Rotor internal diameter R1, rotor diameter R2Relevant, i.e. Φ=4/23 (R2-R1)～3/26 (R2-R1), axial ventilation road (3) are from turning
Axle radial distance W=1/2 Φ the most nearby and between rotor core (4) inner circle, adjacent two axial ventilation road (3) central points with turn
Angle α=18 ° of son (4) initial point line unshakable in one's determination.Described channel-section steel height L2With rotor internal diameter R1, rotor diameter R2Axially
Length D is relevant, for L2=[(D-3R2+3R1)/150]2～[(D-3R2+3R1)/130]2, channel cross-section width W2With channel-section steel height L2
Relevant, for W2=1/2L2～1/3L2, channel-section steel web width W1With channel cross-section width W2Relevant, for W1=1/2W2～1/3W2, channel-section steel edge
Plate hight L1With channel-section steel height L2Relevant, for L1=0.05L2～0.15L2.The channel-section steel listrium hypotenuse near web side and web limit folder
Angle beta is designed as 130 °～136 °, and described three channel-section steels are divided into three kinds of specifications, one to be I-shaped cross-section linear type channel-section steel, and it is long
Spending shorter, refer to " short steel ", other two kinds is the streamlined channel-section steel in I-shaped cross-section, and one of which length is longer, with " long steel "
Referring to, another kind of length, between " long steel " and " short steel ", refers to " middle steel ".Wherein, the width W of long steel and middle steel3With groove
Steel cross-sectional width W2Relevant, for W3=1.73W2～1.91W2, the segmental arc radius R of the streamlined channel-section steel in I-shaped cross-section3High with channel-section steel
Degree L2Relevant, for R3=4.2L2～4.7L2, the straight length L of a segmental arc3=1.925R3。
Described long steel is made up of 5 segmental arcs, its length and rotor internal diameter R1With rotor diameter R2Relevant, for L4=
(2R2-R1)/15～(2R2-R1)/13, middle channel-section steel is made up of 3.5 segmental arcs, length L5=(2R2-R1)/21～(2R2-R1)/19。
Short steel length and rotor internal diameter R1With rotor diameter R2Relevant, its length L6=(2R2-R1)/34～(2R2-R1)/33.Institute
State each channel-section steel be installed on two rotor pinions between air duct in, on each tooth install three channel-section steels, on respectively one
The long steel stated, an above-mentioned middle steel and an above-mentioned short steel.Three channel-section steel distance Edge Distance W unshakable in one's determination4With tooth width L7It is relevant,
For W4=L7/10.In channel-section steel distal shaft end, short steel distance L away from its nearest neighbours tooth limit8=0.1L7～0.3L7, long steel and middle steel are
Streamlined, at channel-section steel distal shaft end, long steel is away from its nearest tooth back gauge L9With facewidth L7Relevant, i.e. L9=0.2L7～0.25L7.Middle steel
And shortest spacing L between short steel10=6 (5L7-4R3-5W2), remote axial end, in, distance L between long channel-section steel11=0.1L7~
0.2L7.On the whole, long steel, middle steel and short steel are circumferentially in regularity distribution, and the channel-section steel that adjacent three rotor tooths are corresponding is one
Group, the preferred mounting means of channel-section steel on three teeth of any one group is followed successively by " long steel ", " middle steel ", " short in the direction of the clock
Steel ", " short steel ", " middle steel ", " long steel ", " short steel ", " middle steel ", " long steel ".
Present invention advantage compared with prior art is: rotor ventilation steel channel is taked an I-shaped cross-section straight
Line style channel-section steel and two streamlined channel-section steels in I-shaped cross-section, change to a certain extent and flow through rotor air quantity, strengthens in motor
Portion's gas flow capability, reaches more preferable cooling effect, makes motor temperature under identical running status lower.
Accompanying drawing explanation
Fig. 1 is electric machine rotor iron core aeration structure schematic diagram；
Fig. 2 is part A enlarged drawing in Fig. 1；
Fig. 3 is front view and the right view of electric machine rotor iron core aeration structure in Fig. 1, and wherein Fig. 3 a is front view, Fig. 3 b
For right view；
Fig. 4 is the streamlined channel-section steel in I-shaped cross-section and I-shaped cross-section linear type channel cross-section figure；
Fig. 5 is I-shaped cross-section linear type channel-section steel schematic diagram；
Fig. 6 is I-shaped cross-section streamlined channel-section steel schematic diagram and top view, and Fig. 6 a is that the streamlined channel-section steel in I-shaped cross-section shows
Being intended to, Fig. 6 b is I-shaped cross-section streamlined channel-section steel top view；
Fig. 7 is channel-section steel distribution schematic diagram in one rotor radial air duct cross section of motor；
Fig. 8 is part B enlarged drawing in Fig. 7；
Fig. 9 is C portion enlarged drawing in Fig. 8.
Detailed description of the invention
The preferred embodiment of the present invention is elaborated below according to accompanying drawing.
(Fig. 2 is part A enlarged drawing in Fig. 1, and Fig. 3 a is Fig. 1 front view, and Fig. 3 b is that Fig. 1 is right as shown in Figure 1, Figure 2 and Figure 3
View), the ventilation structure with I-shaped cross-section linear type and streamlined channel-section steel of the present invention, mainly include radially
Air duct (1), rotor tooth (2), axial ventilation road (3), rotor core (4) and channel-section steel (5).For capacity at 1MW～
In the large-size machine of 1000MW, rotor core (4) is the most uniformly divided into several sections, and hop count n length D axial with rotor has
Close, i.e. n=5.3 × 10-3D～4.8 × 10-3D.Adjacent rotor leaves a fixed gap between (4) unshakable in one's determination, forms Radial ventilation duct
(1), the axial width L of Radial ventilation duct (1) and rotor internal diameter R1, rotor diameter R2Relevant with axial length D, i.e. L=
[(D-3R2+3R1)/150]2～[(D-3R2+3R1)/130]2.The rotor tooth (2) of adjacent segmented rotor (4) unshakable in one's determination is in the axial direction
One_to_one corresponding, channel-section steel (5) is positioned in Radial ventilation duct (1) and circumferentially, and is arranged on adjacent sectional rotor core (4)
Between rotor tooth (2), between each rotor tooth (2) of adjacent sectional rotor core (4), it is placed with three channel-section steels (5), rotor ferrum
The heart (4) is slotted at rotating shaft, forms axial ventilation road (3), provides path, wherein, axial ventilation road for cooling medium flowing
(3) Cross section Design is circular, diameter of phi and rotor internal diameter R1, rotor diameter R2Relevant, i.e. Φ=4/23 (R2-R1)～3/
26(R2-R1), axial ventilation road (3) are from rotating shaft radial distance W=1/2 Φ the most nearby and between rotor core (4) inner circle, phase
Adjacent two axial ventilation road (3) central points and angle α=18 ° of rotor core (4) initial point line.In the present embodiment, motor turns
Sub-internal diameter is R1=1800mm, rotor diameter is R2=2842mm, rotor core (4) axial length D=3570mm, through optimizing
Design, can obtain the hop count n=17～19 of rotor core (4) segmentation, and preferably 18, the axial length L of Radial ventilation duct (1)=
8.76mm～11.66mm, preferably 10mm, axial ventilation road diameter of phi=120.23mm～181.22mm, preferably 166.94mm, W
=83.47mm.
Described three channel cross-sections are all taked I-shaped, and the I-shaped cross-section steel of existing rotor ventilation steel channel ventilates and imitates
Fruit is the best, and does not take into full account that channel-section steel changes the effect of gas flowing, and the present invention is optimized design to I-shaped channel-section steel.
As shown in Figure 4, for ensureing the intensity of I-shaped channel-section steel, to the channel-section steel height (L in Fig. 42), channel cross-section width (W in Fig. 42), groove
Steel web width (W in Fig. 41) and the high (L in Fig. 4 of channel-section steel listrium1) it is optimized design.Wherein, channel-section steel height L2With rotor
Internal diameter R1, rotor diameter R2Relevant with axial length D, for L2=[(D-3R2+3R1)/150]2～[(D-3R2+3R1)/130]2, groove
Steel cross section width W2With channel-section steel height L2Relevant, for W2=1/2L2～1/3L2, channel-section steel web width W1With channel cross-section width W2Relevant, for
W1=1/2W2～1/3W2, channel-section steel listrium height L1With channel-section steel height L2Relevant, for L1=0.05L2～0.15L2.Channel-section steel listrium is close
Hypotenuse and the web limit angle β of web side are designed as 130 °～136 °, in the present embodiment preferably 135 °.In the present embodiment, electricity
Machine rotor internal diameter is R1=1800mm, rotor diameter is R2=2842mm, rotor core (4) axial length D=3570mm, therefore
L2=8.76mm～11.66mm, preferably 10mm, W2=3.33mm～5mm, preferably 4.18mm, W1=1.39mm～2.09mm, excellent
Select 1.49mm, L1=0.5mm～1.5mm, preferably 1mm.
In order to more preferably improve ventilation effect, channel-section steel of the present invention is divided into three kinds of specifications, and one is I-shaped cross-section straight line
Type channel-section steel, its length is shorter, and channel-section steel extends straight structure, below refers to " short steel ", and (this figure is only shown as shown in Figure 5
One section of actual whole channel-section steel)；Other two kinds is the streamlined channel-section steel in I-shaped cross-section, channel-section steel undulate formula extended structure, as
Shown in Fig. 6, one of which length is longer, below refers to " long steel ", and another kind of length is between " long steel " and " short steel ", below
Refer to " middle steel ".Wherein, long steel and middle steel are streamlined, its width W3With channel cross-section width W2Relevant, i.e. W3=1.73W2
～1.91W2, W herein3=7.23mm～7.98mm, preferably 7.68mm.I-shaped cross-section streamlined channel-section steel top view such as Fig. 6 b institute
Show, wherein segmental arc radius R3(for the radius of maximum deflection point), design and channel-section steel height L2Relevant, i.e. R3=4.2L2～4.7L2,
I.e. R3=42mm～47mm, preferably 45mm.The straight length L of one segmental arc3=1.925R3, i.e. 86.625mm.It is so designed that fan
Wind effect is the most obvious.Adjacent two arc segment structures are equivalently-sized, and bending direction is contrary.
In Fig. 7, Fig. 8 and Fig. 9 are a rotor radial air duct cross section, (Fig. 8 is part B in Fig. 7 to channel-section steel scheme of installation
Enlarged drawing, Fig. 9 is C portion enlarged drawing in Fig. 8).Long steel described in the present embodiment and middle steel are the streamlined channel-section steel in I-shaped cross-section, long
Steel is made up of 5 segmental arcs, its length and rotor internal diameter R1With rotor diameter R2Relevant, i.e. L4=(2R2-R1)/15～(2R2-
R1)/13, middle channel-section steel is made up of, length L 3.5 segmental arcs (i.e. 3 whole arcs add 1 half arc)5=(2R2-R1)/21～(2R2-R1)/
19.Short steel is I-shaped cross-section linear type channel-section steel, length also with rotor internal diameter R1With rotor diameter R2Relevant, its length L6
=(2R2-R1)/34～(2R2-R1)/33.In the present embodiment, rotor internal diameter R1=1800mm, rotor diameter R2=
2842mm, i.e. L4=258.93mm～298.77mm, preferably 275mm, L5=184.95mm～204.42mm, preferably 195mm, L6
=114.24mm～117.7mm, preferably 116mm.
Described each channel-section steel be installed on two rotor pinions between air duct in, on each tooth install three channel-section steels, point
It is not an above-mentioned long steel, an above-mentioned middle steel and an above-mentioned short steel.Three channel-section steel distance Edge Distance W unshakable in one's determination4With tooth
Width L7Relevant, for W4=L7/10.In channel-section steel distal shaft end, short steel distance L away from its nearest neighbours tooth limit8=0.1L7～0.3L7, short
The placement direction of steel radially extends to axle.Long steel and middle steel are streamlined, and at channel-section steel distal shaft end, long steel is away from its nearest tooth back gauge
From L9With facewidth L7Relevant, i.e. L9=0.2L7～0.25L7, the placement direction of long steel extends to axle.Due to fairshaped existence,
In, between short channel-section steel, spacing is variate, and with channel-section steel width W2With one segmental arc radius R of streamlined channel-section steel3Relevant, shortest spacing
L10=6 (5L7-4R3-5W2).Remote axial end, in, distance L between long channel-section steel11=0.1L7～0.2L7.In the present embodiment, the facewidth
L7=40mm, R3=45mm, W2=4mm, L3=87.5mm, i.e. L8=4mm～12mm, preferably 8.25mm；L9=8mm～10mm,
Preferably 9.31mm；L10=5.4mm；L11=4mm～8mm, preferably 6.77mm.On the whole, long steel, middle steel and short steel are circumferentially
In regularity distribution, the channel-section steel that adjacent three rotor tooths are corresponding is one group, channel-section steel on three teeth of any one group (IV in Fig. 8,
V, VI) preferably mounting means be followed successively by the direction of the clock " long steel ", " middle steel ", " short steel ", " short steel ", " middle steel ", " long steel ",
" short steel ", " middle steel ", " long steel ".In like manner, whole for motor teeth are divided into counterclockwise the most misaligned some groups, each
The rule of group is identical.
The above, the only detailed description of the invention of the present invention, but the protection of the present invention is not limited thereto, this area skill
Art personnel are not in the case of changing principle, and any improvement without substantial variations made also should be regarded as the protection model of the present invention
Enclose.
The content not being described in detail in description of the invention belongs to prior art known to professional and technical personnel in the field.
Claims (2)
1. there is I-shaped cross-section linear type and the ventilation structure of streamlined channel-section steel, it is characterised in that: mainly include radially
Air duct (1), rotor tooth (2), axial ventilation road (3), rotor core (4) and channel-section steel (5).Rotor core (4) is the most equal
Even being divided into several sections, hop count n length D axial with rotor is relevant, i.e. n=5.3 × 10-3D～4.8 × 10-3D.Adjacent rotor ferrum
Leave a fixed gap between the heart (4), formed in Radial ventilation duct (1), the axial width L of Radial ventilation duct (1) and rotor
Footpath R1, rotor diameter R2Relevant with axial length D, i.e. L=[(D-3R2+3R1)/150]2～[(D-3R2+3R1)/130]2.Adjacent
Rotor tooth (2) one_to_one corresponding in the axial direction of segmented rotor unshakable in one's determination (4), channel-section steel (5) is positioned in Radial ventilation duct (1) and along circle
Week distribution, and be arranged between the rotor tooth (2) of adjacent sectional rotor core (4), each turn of adjacent sectional rotor core (4)
Being placed with three channel-section steels (5) between sub-tooth (2), rotor core (4) is slotted at rotating shaft, forms axial ventilation road (3), for cold
But media flow provides path, and wherein, axial ventilation road (3) Cross section Design is circular, diameter of phi and rotor internal diameter R1, turn
Sub-external diameter R2Relevant, i.e. Φ=4/23 (R2-R1)～3/26 (R2-R1), axial ventilation road (3) from rotating shaft the most nearby with rotor core
(4) the radial distance W=1/2 Φ between inner circle, adjacent two axial ventilation road (3) central points and rotor core (4) initial point line
Angle α=18 °.Described channel-section steel height L2With rotor internal diameter R1, rotor diameter R2Relevant with axial length D, for L2=
[(D-3R2+3R1)/150]2～[(D-3R2+3R1)/130]2, channel cross-section width W2With channel-section steel height L2Relevant, for W2=1/2L2
～1/3L2, channel-section steel web width W1With channel cross-section width W2Relevant, for W1=1/2W2～1/3W2, channel-section steel listrium height L1High with channel-section steel
Degree L2Relevant, for L1=0.05L2～0.15L2.The channel-section steel listrium hypotenuse near web side and web limit angle β are designed as 130 °
～136 °, described three channel-section steels are divided into three kinds of specifications, and one is I-shaped cross-section linear type channel-section steel, and its length is shorter, with " short
Steel " refer to, other two kinds is the streamlined channel-section steel in I-shaped cross-section, and one of which length is longer, refers to " long steel ", another kind of long
Spend between " long steel " and " short steel ", refer to " middle steel ".Wherein, the width W of long steel and middle steel3With channel cross-section width W2Have
Close, for W3=1.73W2～1.91W2, the segmental arc radius R of the streamlined channel-section steel in I-shaped cross-section3With channel-section steel height L2Relevant, for R3=
4.2L2～4.7L2, the straight length L of a segmental arc3=1.925R3。
The ventilation structure with I-shaped cross-section linear type and streamlined channel-section steel the most according to claim 1, it is special
Levy and be: described long steel is made up of 5 segmental arcs, its length and rotor internal diameter R1With rotor diameter R2Relevant, for L4=
(2R2-R1)/15～(2R2-R1)/13, middle steel is made up of 3.5 segmental arcs, length L5=(2R2-R1)/21～(2R2-R1)/19.Short
Steel length and rotor internal diameter R1With rotor diameter R2Relevant, its length L6=(2R2-R1)/34～(2R2-R1)/33.Described
Each channel-section steel be installed on two rotor pinions between air duct in, on each tooth install three channel-section steels, respectively one is above-mentioned
Long steel, an above-mentioned middle steel and an above-mentioned short steel.Three channel-section steel distance Edge Distance W unshakable in one's determination4With tooth width L7Relevant, for
W4=L7/10.In channel-section steel distal shaft end, short steel distance L away from its nearest neighbours tooth limit8=0.1L7～0.3L7, long steel and middle steel are stream
Line style, at channel-section steel distal shaft end, long steel is away from its nearest tooth back gauge L9With facewidth L7Relevant, i.e. L9=0.2L7～0.25L7.Middle steel and
Shortest spacing L between short steel10=6 (5L7-4R3-5W2), remote axial end, middle steel and spacing L of long steel11=0.1L7~
0.2L7.On the whole, long steel, middle steel and short steel are circumferentially in regularity distribution, and the channel-section steel that adjacent three rotor tooths are corresponding is one
Group, the preferred mounting means of channel-section steel on three teeth of any one group is followed successively by " long steel ", " middle steel ", " short in the direction of the clock
Steel ", " short steel ", " middle steel ", " long steel ", " short steel ", " middle steel ", " long steel ".
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|---|---|---|---|---|
| JPS58215954A (en) * | 1982-06-07 | 1983-12-15 | Mitsubishi Electric Corp | Rotor for rotary electric machine |
| CN201075745Y (en) * | 2007-07-25 | 2008-06-18 | 李金中 | Ventilate channel steel for electrical machine generator |
| CN103269138A (en) * | 2013-06-17 | 2013-08-28 | 哈尔滨理工大学 | Multi-inner cavity U-shaped cooling system of motor |
| CN203326747U (en) * | 2013-06-08 | 2013-12-04 | 杭州金锤冷拉型钢有限公司 | High efficient ventilation channel |
| CN203607943U (en) * | 2013-11-13 | 2014-05-21 | 南阳防爆集团股份有限公司 | High-efficiency high-rotating speed high-capacity self-lubricating flame-proof motor rotor structure |
| CN104953766A (en) * | 2015-06-17 | 2015-09-30 | 北京金风科创风电设备有限公司 | Radial ventilation cooling structure of motor |
| CN105680602A (en) * | 2016-04-18 | 2016-06-15 | 哈尔滨理工大学 | Motor convenient for fluid flowing |
-
2016
- 2016-08-29 CN CN201610777163.XA patent/CN106300745A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58215954A (en) * | 1982-06-07 | 1983-12-15 | Mitsubishi Electric Corp | Rotor for rotary electric machine |
| CN201075745Y (en) * | 2007-07-25 | 2008-06-18 | 李金中 | Ventilate channel steel for electrical machine generator |
| CN203326747U (en) * | 2013-06-08 | 2013-12-04 | 杭州金锤冷拉型钢有限公司 | High efficient ventilation channel |
| CN103269138A (en) * | 2013-06-17 | 2013-08-28 | 哈尔滨理工大学 | Multi-inner cavity U-shaped cooling system of motor |
| CN203607943U (en) * | 2013-11-13 | 2014-05-21 | 南阳防爆集团股份有限公司 | High-efficiency high-rotating speed high-capacity self-lubricating flame-proof motor rotor structure |
| CN104953766A (en) * | 2015-06-17 | 2015-09-30 | 北京金风科创风电设备有限公司 | Radial ventilation cooling structure of motor |
| CN105680602A (en) * | 2016-04-18 | 2016-06-15 | 哈尔滨理工大学 | Motor convenient for fluid flowing |
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Application publication date: 20170104 |
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| RJ01 | Rejection of invention patent application after publication |