CN205047508U - High strength centrifugation fan blade - Google Patents
High strength centrifugation fan blade Download PDFInfo
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- CN205047508U CN205047508U CN201520752888.4U CN201520752888U CN205047508U CN 205047508 U CN205047508 U CN 205047508U CN 201520752888 U CN201520752888 U CN 201520752888U CN 205047508 U CN205047508 U CN 205047508U
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- blade
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- salient point
- high strength
- retaining ring
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Abstract
The utility model relates to a ventilation equipment field. High strength centrifugation fan blade, including chassis, wheel hub and a plurality of blade, the wheel hub outside is even as an organic whole with the chassis, and the blade bottom is even as an organic whole with the chassis, keep away from link on the blade bottom on chassis have with the concentric annular retaining ring of arranging in chassis, and annular retaining ring covers the bottom face of all blades, be equipped with a plurality of bumps on the blade backpressure face, the distance is less than distance between bump and the blade medial extremity between bump and the blade outside end, not every blade central angle angle is all the same, blade central angle angle is the contained angle angle that forms between the adjacent blade and the centrifugal fan blade centre of a circle. This high strength centrifugation fan blade's advantage is novel structure, and intensity is better, and the noise is low.
Description
Technical field
The utility model relates to field of ventilation equipment, particularly relates to a kind of centrifugation blade.
Background technique
Centrifugation blade is product conventional in field of ventilation equipment, and centrifugation blade comprises chassis, wheel hub and multiple blade, is connected as a single entity outside wheel hub with inside chassis, and blade bottom end and chassis are connected as a single entity.Centrifugation blade is moulding, in order to reduce the weight of product, generally can hold multiple material-saving hole on wheel hub.The deficiency that existing centrifugation blade exists is: (1) all blade is connected with outer ring by means of only top, and the top end of blade exposes outside, and therefore there is fan blade intensity low, anti-drop limited height, destroys rotational speed rate low; (2) blade of existing fan blade is substantially all identical at the central angle of circumferentially arranging, even if there is fine distinction to be also caused by production error, when rotating, the frequency noise that each blade impact snail tongue produces is consistent, and the Rotation Noise of fan blade is high; (3) be smooth surface in the back pressure face of blade, the arc of blade back pressure surface in the outer part namely position in the outer part, middle part easily produce whirlpool when fan blade rotates, and then noise when increasing fan blade rotation.
Summary of the invention
The purpose of this utility model is the defect existed to solve existing high strength centrifugation blade, and provide a kind of novel structure, noise is low, the high strength centrifugation blade that intensity is high.
In order to realize above-mentioned object, the utility model have employed following technological scheme:
High strength centrifugation blade, comprise chassis, wheel hub and multiple blade, be connected as a single entity outside wheel hub with chassis, blade bottom end and chassis are connected as a single entity; Away from the blade bottom on chassis being connected with the annular retaining ring with chassis concentric arrangement, and annular retaining ring covers vaned bottom end; Blade back pressure surface is provided with multiple salient point, and the spacing of salient point and blade outboard end is less than the spacing of salient point and blade medial extremity; Not every blade central angle angle is all identical, and described blade central angle angle refers to the angle angle formed between adjacent blades and the centrifugation blade center of circle.
As preferably, chassis is provided with multiple material-saving hole, and an effect in material-saving hole is that material-saving reduces product weight and cost of production, and another important effect prevents chassis from deforming when injection moulding; Wheel hub is provided with multiple material-saving mouth, reduce further weight and the production cost of product.
As preferably, the side that annular retaining ring is connected with blade is provided with welding groove, and each groove bottom is equipped with weld bond, and quantity and the shape of welding groove are mated with blade, blade bottom end stretches in welding groove and is welded and fixed with annular retaining ring, significantly can improve the intensity of centrifugation blade.
As preferably, the spacing of salient point and blade outboard end is 20% ~ 70% of the spacing of salient point and blade medial extremity; Salient point thickness is 10% ~ 25% of blade thickness, and salient point width is 10% ~ 25% of blade thickness.
Have employed the high strength centrifugation blade of technique scheme, blade back pressure surface is provided with multiple salient point, the spacing of salient point and blade outboard end is less than the spacing of salient point and blade medial extremity, salient point can upset the whirlpool produced in this position when centrifugation blade rotates, and adopts the structure of salient point can reduce more than noise 2dB; Not every blade central angle angle is all identical, and when rotating, the frequency noise that each blade impact snail tongue produces is inconsistent, effectively can reduce the Rotation Noise of fan blade.Away from the blade bottom on chassis being connected with the annular retaining ring with chassis concentric arrangement, annular retaining ring can significantly improve centrifugation blade intensity, and falling height promotes 50%, and ultra high speed is destroyed rotating speed and improved 25%.The advantage of this high strength centrifugation blade is novel structure, and intensity is better, and noise is low.
Accompanying drawing explanation
Fig. 1: the structural representation of embodiment of the present utility model.
Embodiment
Below in conjunction with accompanying drawing 1, embodiment of the present utility model is made a detailed explanation.
High strength centrifugation blade as shown in Figure 1, comprises chassis 1, wheel hub 3, multiple blade 2 and annular retaining ring 4, is connected as a single entity outside wheel hub 3 with inside chassis 1, and the bottom of all blades 2 is all connected as a single entity with chassis 1.Wheel hub 3 is provided with multiple material-saving mouth 31, reduce further weight and the production cost of product.Blade 2 quantity 43.The center of centrifugation blade and the center of wheel hub 3 are provided with motor axis hole.
Chassis 1 is provided with 10 material-saving holes 11, and the area at least two material-saving holes 11 is different.Material-saving hole 11 is circular material-saving holes, and the center of circle in all material-saving holes 11 is identical to the distance between hub centre, and namely the center of circle in all material-saving holes 11 is in circumferentially same.The radius at least two material-saving holes 11 is different.The fixing production of home position in circular material-saving hole is the most convenient, by adjustment radius size and adjustable balance when especially home position is fixing, very convenient.Spacing between adjacent material-saving hole 11 has difference, and material-saving hole 11 uses as the initial unbalance of adjustment fan blade, and the spacing between adjacent material-saving hole 11 is more conducive to adjustment.The distance of the center of circle to blade 2 the inner in material-saving hole 11 is less than the distance of the center of circle to wheel hub 3 outer ledge in material-saving hole 11, and chassis 1 more easily deforms near the outer end of blade 2 when injection moulding, and therefore said structure is more conducive to preventing chassis 1 to be out of shape.Another effect in material-saving hole 11 is means of the initial unbalance as adjustment fan blade, the initial unbalance of traditional adjustment fan blade is by increasing balancing weight to reach the object of weight balancing at grammes per square metre lower, increases balancing weight and not only makes the weight of product increase the performance that impact uses but also the cost adding use.The mode that existing balancing weight increases the weight of is instead of by the mode of material-saving hole 11 loss of weight, specifically the object that weight that material-saving hole alleviates this place reaches weight balancing is set in grammes per square metre eminence, because the weight subtracted can not be completely the same, therefore there is material-saving hole 11 radius difference and the different reason of area everywhere.
The side that annular retaining ring 4 is connected with blade 2 is provided with welding groove, each groove bottom is equipped with weld bond, the quantity of welding groove and shape are mated with blade 2, and blade 2 bottom is stretched in welding groove and is welded and fixed by weld bond and annular retaining ring ultrasonic wave, significantly can improve the intensity of centrifugation blade.
Blade 2 back pressure face is provided with multiple salient point 21, salient point 21 and the spacing of blade 2 outboard end be less than convex 21 with the spacing of blade 2 medial extremity, salient point 21 and the spacing of blade 2 outboard end are salient points 21 and 20% ~ 70% of the spacing of blade 2 medial extremity.Salient point 21 thickness is 10% ~ 25% of blade 2 thickness, and salient point 21 width is 10% ~ 25% of blade 2 thickness.Salient point 21 can upset the whirlpool produced in this position when centrifugation blade rotates.
Not every blade central angle angle is all identical, and blade central angle angle refers to the angle angle formed between adjacent blades and the centrifugation blade center of circle, and blade central angle angle is between 7 ° ~ 12 °; When rotating, the frequency noise that each blade 2 impacts the generation of snail tongue is inconsistent, effectively can reduce more than the Rotation Noise 2dB of fan blade.
For the high strength centrifugation blade that the conventional model of our company is 360-43-130, centrifugation blade diameter 360mm, 43, blade, height 130mm, blade thickness is 4.2mm, except material-saving hole 11, all physical dimensions of salient point 21 except blade central angle angle are identical, adopt the centrifugation blade of this patent structure compared with the centrifugation blade of the same model size of conventional construction, refer to following performance comparison table.
| 360-43-130 | Weight g | Level of noise dB | Falling height m | Destroy rotating speed rpm |
| Conventional construction | 1350 | 44 | 0.3 | 2100 |
| This patent structure | 1320 | 40 | 0.6 | 2630 |
Claims (5)
1. high strength centrifugation blade, comprise chassis, wheel hub and multiple blade, be connected as a single entity outside wheel hub with chassis, blade bottom end and chassis are connected as a single entity; It is characterized in that: away from the blade bottom on chassis being connected with the annular retaining ring with chassis concentric arrangement, and annular retaining ring covers vaned bottom end; Blade back pressure surface is provided with multiple salient point, and the spacing of salient point and blade outboard end is less than the spacing of salient point and blade medial extremity; Not every blade central angle angle is all identical, and described blade central angle angle refers to the angle angle formed between adjacent blades and the centrifugation blade center of circle.
2. high strength centrifugation blade according to claim 1, it is characterized in that chassis is provided with multiple material-saving hole, wheel hub is provided with multiple material-saving mouth.
3. high strength centrifugation blade according to claim 1, it is characterized in that the side that annular retaining ring is connected with blade is provided with welding groove, each groove bottom is equipped with weld bond, and quantity and the shape of welding groove are mated with blade, and blade bottom end stretches in welding groove and is welded and fixed with annular retaining ring.
4. high strength centrifugation blade according to claim 1, is characterized in that the spacing of salient point and blade outboard end is 20% ~ 70% of the spacing of salient point and blade medial extremity; Salient point thickness is 10% ~ 25% of blade thickness, and salient point width is 10% ~ 25% of blade thickness.
5. high strength centrifugation blade according to claim 1, it is characterized in that blade quantity is between 37 ~ 45, blade central angle angle is between 7 ° ~ 12 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520752888.4U CN205047508U (en) | 2015-09-25 | 2015-09-25 | High strength centrifugation fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520752888.4U CN205047508U (en) | 2015-09-25 | 2015-09-25 | High strength centrifugation fan blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205047508U true CN205047508U (en) | 2016-02-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520752888.4U Active CN205047508U (en) | 2015-09-25 | 2015-09-25 | High strength centrifugation fan blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205047508U (en) |
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2015
- 2015-09-25 CN CN201520752888.4U patent/CN205047508U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |