CN1190881C - Fully-closed external-cooling type electric motor - Google Patents
Fully-closed external-cooling type electric motor Download PDFInfo
- Publication number
- CN1190881C CN1190881C CNB021316988A CN02131698A CN1190881C CN 1190881 C CN1190881 C CN 1190881C CN B021316988 A CNB021316988 A CN B021316988A CN 02131698 A CN02131698 A CN 02131698A CN 1190881 C CN1190881 C CN 1190881C
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- cooling fan
- cooling
- fin
- electric motor
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Abstract
To provide a totally enclosed fan-cooled motor which can reduce noise energy discharged outside through a popular network. This totally enclosed fan-cooled main motor 30 for a vehicle disperses noise energy so that it is not concentrated to a specified frequency and reduces the noise energy discharged outside into low noise, by making irregular the diametrical lengths of a member of fins 1a and 1b of a cooling fan 1 constituting an outer fan and the diametrical thickness of each fin 2a in the radial direction, or forming a dimple 7 in each fin 6a.
Description
Technical field
The present invention relates to a kind of fully-closed external-cooling type electric motor that uses as main electric motor for vehicle.
Background technology
The formation of existing fully-closed external-cooling type main electric motor for vehicle 30 describes with Fig. 9 and Figure 10.In the both sides of axletree 33 wheel 32 is set,, main motor 30 is installed at this geared system 31 at axletree 33 mounting teeth wheel apparatus 31.This main motor 30 is bearing on the frame of chassis side by supporting arrangement 30a, 30b, 31a, 31b with geared system 31.
As shown in figure 10, the rotor of main motor 30 is made of rotor core 43, pushing member 44,45 unshakable in one's determination, bar 46 and end ring 47.The stator side of main motor 30 by stator core 40, coil 56, and frame 57 constitute.Ventilation hole 40a is formed at the top in stator core 40.
The coupling 50,52 that is used for turning power is delivered to geared system 31 sides is installed in end a side of rotor.In addition, at the opposing party's of rotor end installation shaft bearing apparatus 48 and cooling fan 49, fixing by pushing member 55.Relative frame 57 is installed exhaust side carriage 41 in stator one side's end, in addition, and at the end of exhaust side carriage mounting cup 51.In addition, relative frame 57 is installed air inlet lateral brackets 42 in the opposing party's of stator end.In the end of this air inlet lateral bracket 42 end plate 53 is set, in addition, and peristome is provided with air inlet net 54 in the central.
In so existing fully-closed external-cooling type electric motor, make cooling fan 49 revolutions by the revolution of rotor, suck outer gas by air inlet net 54, make it flow through ventilation hole 42a, 40a, 41a, carry out air-cooled to motor.
, in the occasion of the main electric motor for vehicle of so existing fully-closed external-cooling type, there is following such problem.As described above, in existing main electric motor for vehicle, suck air from the outside by cooling fan 49, by being configured to the ventilation hole 40a of 40 peripheries unshakable in one's determination, by the heating that is discharged to outside cooling air inhibition motor, in the occasion of external-cooling type motor, different with the motor that fan is installed in inside, the antitriptic wind sound that constitutes the cooling fan 49 of this exterior wing passes to the outside by air inlet net 54 as noise immediately.
Figure 11 (a) is the enlarged drawing of cooling fan 49 of main electric motor for vehicle of the fully-closed external-cooling type of prior art example, and Figure 11 (b) illustrates its X-X line section.Because the shape of the fin 49a of cooling fan 49 all is identical shaped and same size, in addition, thickness is also certain diametrically, so, the noise level measurement result protrudes in the noise Y in the middle of the 1000Hz-2000Hz shown in the figure of Figure 12, by the noise energy of the frequency band of the frequency-modulated wave of fin number * rotating speed and the decision of antitripic wind acoustic pressure up to 116dB, so, have the destruction problem of environment as vehicle noise.
Summary of the invention
The present invention makes in view of such prior art problems, and its purpose is to provide a kind of fully-closed external-cooling type electric motor that passes to outside noise energy by the air inlet net that reduces.
The heat that loss brought that the fully-closed external-cooling type electric motor of the 1st aspect of the present invention is produced in motor interior by the cooling air cooling, this cooling air can be obtained by the cooling fan that is installed on the motor gyroaxis; Wherein, the outboard end of each fin of above-mentioned cooling fan has length and makes the radical length of these a plurality of fins inconsistent.
The 2nd aspect of the present invention is on the basis of the fully-closed external-cooling type electric motor aspect the present invention the 1st, every 1 or every set the diameter of the fin of above-mentioned cooling fan shorter severally.
The heat that loss brought that the fully-closed external-cooling type electric motor of the 3rd aspect of the present invention is produced in motor interior by the cooling air cooling, this cooling air can be obtained by the cooling fan that is installed on the motor gyroaxis; Wherein, the outboard end of each fin of above-mentioned cooling fan has length and makes the radical length of these a plurality of fins inconsistent, and each fin forms the thick shape of the thin and interior all sides of its outer circumferential side.
The 4th aspect of the present invention makes the relative radial centre lines of shape of each fin asymmetric in the front and back of gyratory directions on the basis of the fully-closed external-cooling type electric motor aspect the of the present invention the 3rd.
The heat that loss brought that the fully-closed external-cooling type electric motor of the 5th aspect of the present invention is produced in motor interior by the cooling air cooling, this cooling air can be obtained by the cooling fan that is installed on the motor gyroaxis; Wherein, a plurality of pits are set on comprehensively separately at a plurality of fins of above-mentioned cooling fan.
The 6th aspect of the present invention aspect the present invention 1-4 on the basis of fully-closed external-cooling type electric motor of either side, a plurality of pits are set on comprehensively separately at a plurality of fins of above-mentioned cooling fan.
In fully-closed external-cooling type electric motor of the present invention, the radical length of a plurality of fins by making the cooling fan that constitutes exterior wing is inequality, the thickness that makes each fin is radially inequality, or form pit etc. at each fin, noise energy is disperseed, reduce and pass to outside noise energy.
Description of drawings
Fig. 1 is the sectional drawing of structure that the fully-closed external-cooling type main electric motor for vehicle of the present invention's the 1st form of implementation is shown.
Fig. 2 is sectional drawing and its A-A line sectional drawing of the cooling fan of above-mentioned form of implementation.
Fig. 3 is that figure is measured in the frequency distribution of the noise of above-mentioned form of implementation.
Fig. 4 is sectional drawing and its B-B line sectional drawing that the cooling fan of the present invention's the 2nd form of implementation is shown.
Fig. 5 is sectional drawing and its C-C line sectional drawing that the cooling fan of the present invention's the 3rd form of implementation is shown.
Fig. 6 is the side view of installation constitution that the cooling fan of the present invention's the 4th form of implementation is shown.
Fig. 7 is sectional drawing and its D-D line sectional drawing of the cooling fan of the present invention's the 5th form of implementation.
Fig. 8 is sectional drawing and its E-E line sectional drawing of the cooling fan of the present invention's the 6th form of implementation.
Fig. 9 is the front elevation of installation constitution of chassis that the rail truck of the relative prior art of main motor is shown.
Figure 10 is the sectional drawing of structure of the fully-closed external-cooling type main electric motor for vehicle of prior art example.
Figure 11 is sectional drawing and its X-X line sectional drawing of the cooling fan of prior art example.
Figure 12 is that figure is measured in the frequency distribution of the noise of prior art example.
Embodiment
Below, describe form of implementation of the present invention with reference to the accompanying drawings in detail.Fig. 1 illustrates the structure of the fully-closed external-cooling type main electric motor for vehicle 30 of the present invention's the 1st form of implementation.In this motor 30, the parts identical with prior art example shown in Figure 10 are represented with same-sign.
This form of implementation is characterised in that the structure of cooling fan 1 shown in Fig. 2 (a) and (b).This cooling fan 1 is by the gyroaxis driving rotational of motor 30.A plurality of fins of this cooling fan 1 are made of long fin 1a and the brachypterism sheet 1b that radical length (i.e. height) differs α, and these long fin 1a and brachypterism sheet 1b be alternately configuration on circumferentially.
Like this, in the main electric motor for vehicle 30 of the 1st form of implementation, when the frequency distribution of the antitriptic wind sound of measuring the cooling fan 1 that spreads out of from air inlet net 54, find, as shown in Figure 3, the peak value of noise is dispersed into V1 and V2, and the acoustic pressure of each noise peak V1, V2 is also lower than the noise of 5-20% prior art below half of the acoustic pressure of the noise Y of prior art example shown in Figure 12.
Though alternately dispose long fin 1a and brachypterism sheet 1b in above-mentioned form of implementation, this configuration also can form configuration or other suitable configuration of per 2 corresponding 1 brachypterism sheets of long fin when considering intake efficiency.
Below, according to Fig. 4 (a) and (b) the 2nd form of implementation of the present invention is described.The feature of the main electric motor for vehicle 30 of the 2nd form of implementation also is the structure of cooling fan 2.This cooling fan 2 is used for the part of the cooling fan 1 of the 1st form of implementation shown in Figure 1.
In the 2nd form of implementation, be characterised in that: thin, the big more shape of past more radially inner side wall thickness of the wall that the shape of the fin 2a of cooling fan 2 forms radial outside.
Like this, though the size of a plurality of fin 2a of cooling fan 2 is respectively necessarily, the wall thickness by making each fin 2a is in the outside and inboard unequal, also can reduce the turbulent flow of the air by fin 2a and rectificationization realizes low noiseization.
Below, according to Fig. 5 (a) and (b) the 3rd form of implementation of the present invention is described.The feature of the main electric motor for vehicle 30 of the 3rd form of implementation also is the structure of cooling fan 3.This cooling fan 3 is used for the part of the cooling fan 1 of the 1st form of implementation shown in Figure 1.
In the 3rd form of implementation, make the same length radially that makes of a plurality of fins of cooling fan 3 unequal with the 1st form of implementation, simultaneously, the same wall thickness of each fin that makes with the 2nd form of implementation is thin and thick in the inboard at radial outside.That is, a plurality of fins of cooling fan 3 are made of long fin 3a that highly differs β and brachypterism sheet 3b.These long fin 3a and brachypterism sheet 3b are in circumferential alternate configurations.The wall thickness of long fin 3a, brachypterism sheet 3b approaches in the inboard thick at radial outside respectively.
Like this, in the 3rd form of implementation, can obtain the action effect of the 1st form of implementation and the 2nd form of implementation simultaneously, do one's utmost to reduce the rectificationization of the turbulent flow of the air by fin 3a, 3b, further low noiseization.
Below, in the 4th form of implementation of the present invention, use Fig. 6 to describe.The main electric motor for vehicle 30 of the fully-closed external-cooling type of the 4th form of implementation is characterised in that the installation constitution with cooling fan 4.Promptly, be characterised in that, though cooling fan 4 is installed by hold-down nut 4a in the end of the gyroaxis 30a of motor 30 relatively, the place that is shaped as in being exposed to the air-flow of cooling air of this hold-down nut 4a does not form sharp-pointed edge, the slick and sly shape (for example hemispherical) in surface.
Like this, also can reduce the gyroaxis antitriptic wind sound partly of the cooling fan 4 of high speed rotary by the 4th form of implementation, realize low noiseization.This hold-down nut 5 also can be used for fixedly cooling fan in 1-the 3rd and the 5th, the 6th form of implementation described later, like this, can realize the further low noiseization of each form of implementation.
Below, according to Fig. 7 (a) and (b) the 5th form of implementation of the present invention is described.The feature of the main electric motor for vehicle 30 of the 5th form of implementation also is the structure of a plurality of fins 60 of cooling fan 6.This cooling fan 6 is used for the part of the cooling fan 1 of the 1st form of implementation shown in Figure 1.
In the 5th form of implementation, a plurality of fin 6a of cooling fan 6 are the same with the 2nd form of implementation, and the wall thickness of each fin that makes is thin, thick in the inboard at radial outside.In addition, form a plurality of hemispheric pits 7 in the side of each fin 6a.
Like this, in the 5th form of implementation, also can make air stream rectificationization, realize low noiseization by fin 6a.In addition, each fin that this pit 7 also can relative the 1st, the 3rd form of implementation is provided with, and further realizes low noiseization respectively.
Below, according to Fig. 8 (a) and (b) the 6th form of implementation of the present invention is described.The feature of the main electric motor for vehicle 30 of the 6th form of implementation also is the structure of cooling fan 8.This cooling fan 8 is used for the part of the cooling fan 1 of the 1st form of implementation shown in Figure 1.
In the 6th form of implementation, the fin 8a of cooling fan 8 is the same with the 2nd form of implementation shown in Figure 4 to form that wall thickness is thin at radial outside, the thick more shape in past more inboard, and the front and back shape of the radial centre lines gyratory directions of each fin 8a is asymmetric relatively.That is, such shown in Fig. 8 (b), protuberance width x1, the x2 of each fin 8a do not waited (x1＞x2).
Form such shape, also can make air rectificationization realize low noiseization by fin 8a.And the asymmetry of this shape not only is suitable for for the 2nd form of implementation, and also is suitable for for the 3rd form of implementation shown in Figure 5, the 5th form of implementation shown in Figure 7.
As described above according to the present invention, the radical length of a plurality of fins by making the cooling fan that constitutes exterior wing is inequality, and the thickness that makes each fin is radially inequality, or forms pit etc. at each fin, noise energy is disperseed, reduce and pass to outside noise energy.
In addition, according to the present invention, be slick and sly shape by the hold-down nut that makes cooling fan, the antitriptic wind sound in the time of can reducing high speed rotary reduces noise.
Claims (6)
1. a fully-closed external-cooling type electric motor cools off the heat that loss brought that produces in motor interior by cooling air, and this cooling air can be obtained by the cooling fan that is installed on the motor gyroaxis; It is characterized in that: the outboard end of each fin of above-mentioned cooling fan has length and makes the radical length of these a plurality of fins inconsistent.
2. fully-closed external-cooling type electric motor according to claim 1 is characterized in that: every 1 or every set the diameter of the fin of above-mentioned cooling fan shorter a plurality ofly.
3. a fully-closed external-cooling type electric motor cools off the heat that loss brought that produces in motor interior by cooling air, and this cooling air can be obtained by the cooling fan that is installed on the motor gyroaxis; It is characterized in that: the outboard end of each fin of above-mentioned cooling fan has length and makes the radical length of these a plurality of fins inconsistent, and each fin forms its outside and approaches and inboard thick shape.
4. fully-closed external-cooling type electric motor according to claim 3 is characterized in that: make the relative radial centre lines of shape of each fin asymmetric in the front and back of gyratory directions.
5. a fully-closed external-cooling type electric motor cools off the heat that loss brought that produces in motor interior by cooling air, and this cooling air can be obtained by the cooling fan that is installed on the motor gyroaxis; It is characterized in that: a plurality of pits are set on comprehensively separately at a plurality of fins of above-mentioned cooling fan.
6. according to any one described fully-closed external-cooling type electric motor among the claim 1-4, it is characterized in that: a plurality of pits are set on comprehensively separately at a plurality of fins of above-mentioned cooling fan.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001276660A JP2003088045A (en) | 2001-09-12 | 2001-09-12 | Totally enclosed fan-cooled motor |
| JP276660/2001 | 2001-09-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1405952A CN1405952A (en) | 2003-03-26 |
| CN1190881C true CN1190881C (en) | 2005-02-23 |
Family
ID=19101326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021316988A Expired - Fee Related CN1190881C (en) | 2001-09-12 | 2002-09-12 | Fully-closed external-cooling type electric motor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2003088045A (en) |
| CN (1) | CN1190881C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111315997A (en) * | 2017-08-24 | 2020-06-19 | 通用电气再生能源(瑞士)有限公司 | Fan (Refresh Fan) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4686228B2 (en) * | 2005-03-23 | 2011-05-25 | 株式会社東芝 | Fully enclosed fan motor |
| JP4621980B2 (en) * | 2005-06-30 | 2011-02-02 | 東芝ホームテクノ株式会社 | Fan motor |
| JP5026010B2 (en) * | 2006-07-19 | 2012-09-12 | デンヨー株式会社 | Cooling fan for rotating equipment |
| JP2008115790A (en) * | 2006-11-06 | 2008-05-22 | Fuji Electric Fa Components & Systems Co Ltd | Rotating machine |
| ES2377832T3 (en) * | 2007-09-10 | 2012-04-02 | Mitsubishi Electric Corporation | Propeller for vehicle. |
| CN102971945A (en) * | 2010-08-04 | 2013-03-13 | 三菱电机株式会社 | Dynamo-electric machine |
| WO2015104731A1 (en) * | 2014-01-07 | 2015-07-16 | 三菱電機株式会社 | Rotating electrical machine |
| CN104963891A (en) * | 2015-08-03 | 2015-10-07 | 吉首大学 | Dirt retention prevention draught fan impeller with wedge-shaped blades and disk-shaped back plate |
| CN105020151A (en) * | 2015-08-03 | 2015-11-04 | 吉首大学 | Dirt retention prevention draught fan with wedge-shaped blades and disc-shaped back plate |
| CN104989671A (en) * | 2015-08-03 | 2015-10-21 | 吉首大学 | Anti-dust accumulation fan with wedge-shaped blades |
| CN104989670A (en) * | 2015-08-03 | 2015-10-21 | 吉首大学 | Anti-dust accumulation fan impeller with wedge-shaped blades |
| CN112855609B (en) * | 2019-11-28 | 2022-03-15 | 中车永济电机有限公司 | Fan and motor |
| CN218733686U (en) * | 2020-01-27 | 2023-03-24 | 三菱电机株式会社 | Drive control device for electric vehicle |
-
2001
- 2001-09-12 JP JP2001276660A patent/JP2003088045A/en active Pending
-
2002
- 2002-09-12 CN CNB021316988A patent/CN1190881C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111315997A (en) * | 2017-08-24 | 2020-06-19 | 通用电气再生能源(瑞士)有限公司 | Fan (Refresh Fan) |
| CN111315997B (en) * | 2017-08-24 | 2023-02-14 | 通用电气再生能源(瑞士)有限公司 | Fan (Refresh Fan) |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2003088045A (en) | 2003-03-20 |
| CN1405952A (en) | 2003-03-26 |
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Granted publication date: 20050223 |