CN205429925U - Generator front end housing does not have outlet angle of impact air -out structure - Google Patents
Generator front end housing does not have outlet angle of impact air -out structure Download PDFInfo
- Publication number
- CN205429925U CN205429925U CN201521059856.2U CN201521059856U CN205429925U CN 205429925 U CN205429925 U CN 205429925U CN 201521059856 U CN201521059856 U CN 201521059856U CN 205429925 U CN205429925 U CN 205429925U
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- China
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- air
- fan wheel
- end housing
- bearing bracket
- outlet angle
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- Withdrawn - After Issue
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Abstract
The utility model discloses a generator front end housing does not have outlet angle of impact air -out structure. The front end housing of generator with install centrifugal fan on power generator shaft and has constituted the air -out structure of generator. When high -velocity air that fan wheel produced gets into on the front end housing N air outlet duct mouth, lose partly pressure owing to strike the loss, the size of this kind of loss depend on high -velocity air when getting into the air outlet duct mouth, to the outlet angle alpha of front end housing air outlet duct mouth and fan wheel's outlet angle beta's identical degree, if coincide mutually, the loss when then high -velocity air gets into front end housing air outlet duct mouth is minimum. At this moment, the outlet angle of front end housing air outlet duct mouth is called does not have the outlet angle of impact. Equal that the distinguished and admirable foundation of high speed that fan wheel produced parallel and do not have an impact with front end housing air outlet duct actinal surface as fan wheel's the outlet angle alpha and the outlet angle beta of front end housing air outlet duct mouth, greatly reduced fan wheel's dynamic pressure lose, improved generator ventilation efficiency.
Description
Technical field
This utility model relates to a kind of front end of shield without impacting bicker air exhausting structure.
Background technology
Electromotor is most frequently with centrifugal fan, centrifugal fan air inlet through hollow shaft, when the impeller is rotated, interlobate air is thrown out to the direction of impeller outer edge by produced centrifugal force, new gas the most constantly supplements at profile ID, forming the continuous flowing of gas, its result is that of obtaining gas pressure can pass through wind path.Generally the air exhausting structure of electromotor is for ease of processing, the angle of outlet of drive end bearing bracket air-out notch generally radial direction, i.e. angle of outlet α=90 degree.Owing to the angle of outlet of drive end bearing bracket air-out notch differs bigger with the angle of outlet of blast fan, may result in produced high velocity air during blast fan rotary work and produce impact with drive end bearing bracket air-out groove actinal surface, and with bigger eddy current and local resistance, cause the kinetic pressure losses of fluid, ultimately result in fan efficiency and reduce.So under given conditions, the outlet angle beta of blast fan is determined by calculating, and make angle of outlet α of drive end bearing bracket air-out notch equal with the outlet angle beta of blast fan, the high speed that makes blast fan produce is distinguished and admirable the most parallel with drive end bearing bracket air-out groove actinal surface and without impacting, thus greatly reduce the kinetic pressure losses of blast fan, improve drafting efficiency.
Summary of the invention
The purpose of this utility model there are provided a kind of front end of shield without impacting bicker air exhausting structure.When the high velocity air that blast fan produces enters N number of air-out notch on drive end bearing bracket, lose a part of pressure due to impact loss.The size of this loss depends on high velocity air degree of agreement when entering air-out notch, to angle of outlet α of drive end bearing bracket air-out notch with the outlet angle beta of blast fan.If matched mutually, then loss when high velocity air enters air-out notch is minimum.The angle of outlet of at this moment drive end bearing bracket air-out notch is referred to as without impacting bicker.Under conditions of given blast fan rotating speed with flow, the linear velocity u=outer radius × vane angle speed of impeller blade outer radius point, and high velocity air can be determined by the ratio of flow with ventilation section for the relative velocity w of blade, the Vector modulation of linear velocity u and relative velocity w is exactly absolute velocity v of impeller vane outer radius point, and the angle that the tangent line of the direction of absolute velocity v of impeller vane outer radius point and this point is formed is exactly angle of outlet α of drive end bearing bracket air-out notch.Determined the outlet angle beta of blast fan by calculating after, angle of outlet α making drive end bearing bracket air-out notch is equal with the outlet angle beta of blast fan, at this moment blast fan produce high velocity air parallel with drive end bearing bracket air-out groove actinal surface and without impact, thus greatly reduce the kinetic pressure losses of blast fan, improve drafting efficiency.
nullThe utility model is achieved like this，A kind of front end of shield is without impacting bicker air exhausting structure，It is by drive end bearing bracket、Centrifugal fan wheel、Alternator shaft、Generator unit stator、Tie down screw、Generator amature、Rear end cap forms，It is characterized in that: centrifugal fan wheel is arranged on alternator shaft，Drive end bearing bracket is arranged on generator unit stator and installs locking by tie down screw，N number of air-out groove interruption-forming aeration structure of electromotor in centrifugal fan wheel and drive end bearing bracket circumference，Engine rotor is arranged on generator unit stator lower end，Rear end cap is arranged on electromotor rear end，Rotating speed according to air quantity and centrifugal fan wheel can determine impeller outlet angle beta，And make angle of outlet α of drive end bearing bracket air-out notch equal with the outlet angle beta of blast fan，The distinguished and admirable air-out groove actinal surface corresponding with drive end bearing bracket of high speed making centrifugal fan wheel produce is parallel；This electromotor is suction fan structure.
Of the present utility model have the technical effect that this utility model passes through front end of shield without impacting bicker air exhausting structure, guarantee that angle of outlet α of drive end bearing bracket air-out notch is equal with the outlet angle beta of blast fan, the high speed that makes blast fan produce is distinguished and admirable the most parallel with drive end bearing bracket air-out groove actinal surface and without impacting, thus greatly reduce the kinetic pressure losses of blast fan, improve drafting efficiency.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the A-A profile of middle Fig. 1 of the present utility model.
Fig. 3 is the partial enlarged drawing of middle Fig. 2 of the present utility model.
In the drawings, 1, drive end bearing bracket (its circumference is provided with N number of air-out notch) 2, centrifugal fan wheel 3, alternator shaft 4, generator unit stator 5, tie down screw 6, generator amature 7, rear end cap.
Detailed description of the invention
As Figure 1-3, a kind of front end of shield is without impacting bicker air exhausting structure, it is by drive end bearing bracket 1, centrifugal fan wheel 2, alternator shaft 3, generator unit stator 4, tie down screw 5, generator amature 6, rear end cap 7 forms, it is characterized in that: centrifugal fan wheel 2 is arranged on alternator shaft 3, drive end bearing bracket 1 is arranged on generator unit stator 4 and installs locking by tie down screw 5, centrifugal fan wheel 2 goes up N number of air-out groove interruption-forming aeration structure of electromotor with drive end bearing bracket 1 circumference, rotating speed according to air quantity and centrifugal fan wheel 2 can determine that impeller outlet angle beta, and make angle of outlet α of drive end bearing bracket air-out notch equal with the outlet angle beta of blast fan, the distinguished and admirable air-out groove actinal surface corresponding with drive end bearing bracket 1 of high speed making centrifugal fan wheel 2 produce is parallel.
This front end of shield is a kind of efficient aeration structure without impacting bicker air exhausting structure, owing to angle of outlet α of drive end bearing bracket air-out notch and the outlet angle beta of blast fan are equal, during centrifugal fan wheel 2 rotary work, produced high velocity air is substantially parallel with the air-out groove actinal surface of drive end bearing bracket 1, high velocity air will not produce impact to the air-out groove actinal surface of drive end bearing bracket 1, avoid eddy current, reduce local resistance, reduce the kinetic pressure losses of fluid, improve the drafting efficiency of electromotor.
Operation principle of the present utility model: as shown in Figure 1, apparatus for electrical generator ventilation system uses air draft structure, negative pressure can be produced when centrifugal fan wheel 2 rotates, the heat dissipation channel causing air-flow to be sucked through electromotor from rear end cap 7 enters centrifugal fan wheel 2 inner radius, rotation due to centrifugal fan wheel 2, interlobate air is thrown out to the direction of impeller outer edge by produced centrifugal force, new gas the most constantly supplements at profile ID, forming the continuous flowing of gas, its result is that of obtaining gas pressure can pass through wind path.If angle of outlet α of drive end bearing bracket 1 air-out notch is inconsistent with the outlet angle beta of centrifugal fan wheel 2, may result in the air-out groove actinal surface of produced high velocity air and drive end bearing bracket 1 during centrifugal fan wheel 2 rotary work and produce impact, and with bigger eddy current and local resistance, cause the kinetic pressure losses of fluid, ultimately result in fan efficiency and reduce.So, under given conditions, the outlet angle beta of centrifugal fan wheel 2 is determined by calculating, and make angle of outlet α of drive end bearing bracket 1 air-out notch equal with the outlet angle beta of centrifugal fan wheel 2, the high speed that makes centrifugal fan wheel 2 produce is distinguished and admirable the most parallel with the air-out groove actinal surface of drive end bearing bracket 1 and without impacting, thus greatly reduce the kinetic pressure losses of blast fan, improve drafting efficiency.
Claims (2)
1. a front end of shield is without impacting bicker air exhausting structure, it is by drive end bearing bracket, centrifugal fan wheel, alternator shaft, generator unit stator, tie down screw, generator amature, rear end cap forms, it is characterized in that: centrifugal fan wheel is arranged on alternator shaft, drive end bearing bracket is arranged on generator unit stator and installs locking by tie down screw, N number of air-out groove interruption-forming aeration structure of electromotor in centrifugal fan wheel and drive end bearing bracket circumference, engine rotor is arranged on generator unit stator lower end, rear end cap is arranged on electromotor rear end, rotating speed according to air quantity and centrifugal fan wheel can determine impeller outlet angle beta, and make angle of outlet α of drive end bearing bracket air-out notch equal with the outlet angle beta of blast fan, the distinguished and admirable air-out groove actinal surface corresponding with drive end bearing bracket of high speed making centrifugal fan wheel produce is parallel.
A kind of front end of shield the most according to claim 1 is without impacting bicker air exhausting structure, it is characterised in that: this electromotor is suction fan structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521059856.2U CN205429925U (en) | 2015-12-19 | 2015-12-19 | Generator front end housing does not have outlet angle of impact air -out structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521059856.2U CN205429925U (en) | 2015-12-19 | 2015-12-19 | Generator front end housing does not have outlet angle of impact air -out structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205429925U true CN205429925U (en) | 2016-08-03 |
Family
ID=56538293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521059856.2U Withdrawn - After Issue CN205429925U (en) | 2015-12-19 | 2015-12-19 | Generator front end housing does not have outlet angle of impact air -out structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205429925U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105553181A (en) * | 2015-12-19 | 2016-05-04 | 江西泰豪军工集团有限公司 | Non-impact outlet angle air-outlet structure on front end cover of electric generator |
-
2015
- 2015-12-19 CN CN201521059856.2U patent/CN205429925U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105553181A (en) * | 2015-12-19 | 2016-05-04 | 江西泰豪军工集团有限公司 | Non-impact outlet angle air-outlet structure on front end cover of electric generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160803 Effective date of abandoning: 20181023 |