CN201043531Y - Novel fan for freezing device - Google Patents
Novel fan for freezing device Download PDFInfo
- Publication number
- CN201043531Y CN201043531Y CNU2007200693833U CN200720069383U CN201043531Y CN 201043531 Y CN201043531 Y CN 201043531Y CN U2007200693833 U CNU2007200693833 U CN U2007200693833U CN 200720069383 U CN200720069383 U CN 200720069383U CN 201043531 Y CN201043531 Y CN 201043531Y
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- CN
- China
- Prior art keywords
- blade
- blower fan
- aperture
- fan according
- row
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a new blower used in a freezing device, which relates to a vane type air compressing and conveying machine, a blower. Holes are arranged near the tips of the vanes of the blower. The utility model can reduce the vibration of the blower and prevent the generation of condensation water in the hollow vanes, thus increasing the reliability of operation and the service life of the blower.
Description
Technical field
The utility model relates to compression of blade type gas and conveying mechanism---blower fan, more specifically, relates to a kind of novel freezing plant blower fan.
Background technique
The working principle of fan blade is based on air and forms pressure reduction on the upper and lower surface of blade, produces lift.Because blade is in the blade tip zone, the blade tip rotational speed reaches maximum value, thereby blade tip air-flow resultant velocity reaches maximum value equally, has also promptly formed huge pressure reduction in that the tip segment blade of blade is upper and lower.Because blade upper surface pressure is much larger than lower surface pressure, air-flow will be walked around leaf tip in the blade tip zone by the zone of high pressure with very high speed and flow to low pressure area.It is totally unfavorable to the efficient and the operational reliability of blower fan to acutely flowing of negative pressuren zone that this air-flow is walked around the blade tip end by the zone of high pressure; In flow process, the zone of high pressure air-flow to low pressure area (negative pressuren zone), forms very big pulse shock power to the air duct cartridge type with very high velocity flow, makes air duct produce bigger vibration, is easy to fatigue ruption.If blade is hollow, the wet air of sealing up for safekeeping in the blade can form water of condensation even frosting because of the declining to a great extent of temperature in the freezing plant in hollow blade, thereby influences the dynamic balancing of blade.
What the existing technological scheme that addresses this problem was more is to concentrate on the shape that changes blade.
The model utility content
The purpose of this utility model is to provide a kind of and can reduce fan vibration for solving the problem of above-mentioned existence, the draught fan impeller that the foods freezing device of raising operational reliability is used.
The utility model purpose realizes being finished by following technological scheme:
A kind of novel freezing plant blower fan is characterized in that: blade is in close blade tip position perforate.
The distribution in hole and pore size at first will be considered the impeller intensity requirement.
The hole can be listed as into a row or multi-row along the blade tip direction of blade, can stagger in adjacent row's hole, and each row goes up the size in aperture can be different, and each row goes up the number in hole also can be different.Evenly distribute with round, or be the inhomogeneous arrangements of symmetric points with this row's mid point.
The size in aperture should be no more than the thickness of this place's blade, and distinguishingly, for the blade of thinner thickness, the aperture should be greater than 0.5mm.
Centre distance with the round adjacent holes is 1 to 4 times of aperture.
Cylindrical hole is adopted in the shape suggestion in hole, and orifice edge has radius to be no more than the fillet in 0.2 times of aperture.Fillet has been not counted in the porose area scope.
In addition, if blade is hollow, the existence in hole can active balance blower fan operation process in the inside and outside pressure difference that causes because of the temperature difference of blade, simultaneously, also can solve because of the declining to a great extent of temperature in the freezing plant, in hollow blade, form the problem of water of condensation even frosting.
The hole has been communicated with different surfaces, makes that the pressure difference between the surface reduces, thereby air-flow reduces from the high-pressure area to the airspeed that low pressure area streams, and has reduced the vibration of blower fan, has improved the working life of reliability of operation and blower fan.
Description of drawings
Fig. 1 is an embodiment's of the utility model a draught fan impeller schematic perspective view.
Fig. 2 is that schematic representation is arranged in the hole of blade surface.
In the accompanying drawing: 1 is the impeller shroud, and 2 is blade, and 3 is the hole at blade tip position on the blade, and 4 is the impeller hub disk.
Embodiment
The utility model feature and other correlated characteristics are described in further detail by embodiment below in conjunction with accompanying drawing, so that technician's of the same trade understanding.
Referring to accompanying drawing 1, a kind of novel freezing plant blower fan comprises impeller shroud 1, blade 2 and impeller hub disk 4, and blade is in tip perforate 3.
2 signals of the arrangement mode in hole such as accompanying drawing, the hole be shaped as cylindrical hole, four holes 3 of every row, the aperture is 2 centimetres, with row equidistantly, adjacent holes centre distance is 8 centimetres.The two misarrangements row that begin to rehearse, the distance between two rows is 2 centimetres.
Certainly,, do not spend performing creative labour, on the basis of the foregoing description, can do multiple variation, can realize the purpose of this utility model equally for one of ordinary skill in the art.Shape as hole and surface intersection line is oval.But above-mentioned various variations obviously should be in the protection domain of claims of the present utility model.
Claims (6)
1. a novel freezing plant blower fan mainly comprises shroud, hub disk, blade, it is characterized in that: the blade of blower fan is in close blade tip position perforate.
2. blower fan according to claim 1 is characterized in that: the size in aperture should be no more than the thickness of this place's material, and distinguishingly, for the blade of thinner thickness, the aperture should be greater than 0.5mm.
3. blower fan according to claim 1 and 2 is characterized in that: the hole can be listed as into a row or multi-row along the blade tip direction of blade.
4. blower fan according to claim 3 is characterized in that: evenly distribute with round, or be the inhomogeneous arrangements of symmetric points with this row's mid point.
5. blower fan according to claim 3 is characterized in that: the fillet radius of orifice edge is no more than 0.2 times of aperture.
6. blower fan according to claim 3 is characterized in that: the centre distance with the round adjacent holes is 1 to 4 times of aperture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200693833U CN201043531Y (en) | 2007-04-27 | 2007-04-27 | Novel fan for freezing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200693833U CN201043531Y (en) | 2007-04-27 | 2007-04-27 | Novel fan for freezing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201043531Y true CN201043531Y (en) | 2008-04-02 |
Family
ID=39258425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200693833U Expired - Fee Related CN201043531Y (en) | 2007-04-27 | 2007-04-27 | Novel fan for freezing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201043531Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2466125A (en) * | 2008-12-11 | 2010-06-16 | Zhongshan Broad Ocean Motor Co | A Fan Blade with Holes |
| WO2010069126A1 (en) * | 2008-12-19 | 2010-06-24 | 常州祥明电机有限公司 | Impeller of blower |
| CN101292699B (en) * | 2007-04-27 | 2011-05-04 | 上海海洋大学 | Draught fan for foods freezing device |
| CN102439320A (en) * | 2009-05-20 | 2012-05-02 | W&S管理公司 | Fan blade |
-
2007
- 2007-04-27 CN CNU2007200693833U patent/CN201043531Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101292699B (en) * | 2007-04-27 | 2011-05-04 | 上海海洋大学 | Draught fan for foods freezing device |
| GB2466125A (en) * | 2008-12-11 | 2010-06-16 | Zhongshan Broad Ocean Motor Co | A Fan Blade with Holes |
| WO2010069126A1 (en) * | 2008-12-19 | 2010-06-24 | 常州祥明电机有限公司 | Impeller of blower |
| CN102439320A (en) * | 2009-05-20 | 2012-05-02 | W&S管理公司 | Fan blade |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080402 |