CN205401226U - Impeller structure - Google Patents

Impeller structure Download PDF

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Publication number
CN205401226U
CN205401226U CN201620152534.0U CN201620152534U CN205401226U CN 205401226 U CN205401226 U CN 205401226U CN 201620152534 U CN201620152534 U CN 201620152534U CN 205401226 U CN205401226 U CN 205401226U
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China
Prior art keywords
blade
angle
outlet
rear end
mid
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CN201620152534.0U
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Chinese (zh)
Inventor
何立博
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Ningbo Fotile Kitchen Ware Co Ltd
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Ningbo Fotile Kitchen Ware Co Ltd
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Priority to CN201620152534.0U priority Critical patent/CN205401226U/en
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Abstract

The utility model discloses an impeller structure, include mid -game and the blade that distributes along the mid -game circumferencial direction, install the front end housing at the front end of blade, install rear end cap, its characterized in that in the rear end of blade: the outlet angle alpha angle that the blade is close to front end housing department is less than the outlet angle gamma angle that the blade is close to mid -game department, and the outlet angle beta angle that the blade is close to rear end cap department is less than the outlet angle gamma angle that the blade is close to mid -game department. The utility model has the advantages of: this impeller structure all designs the outlet angle gamma angle that becomes to be lighter than the blade and be close to mid -game department through outlet angle alpha angle of being close to the blade front end housing department and the outlet angle beta angle that the blade is close to rear end cap department, and the export angle of utilizing the axial twisted blade to change the different positions of blade axial promptly makes impeller structure more accord with the air speed distribution of impeller inside for the blade is effectively strengthened to the air current acting ability of the different positions of axis direction, thereby improves the work efficiency of impeller.

Description

A kind of blade wheel structure
Technical field
This utility model relates to a kind of blade wheel structure.
Background technology
Traditional impeller used for range hood is fastened and connected by two ends after being generally plate stamping pressing formation, blade generally can only make the circular arc of uniform thickness self-consistentency, but, actually due to impeller, to gas, the effect of prewhirling and gas carry out progressively changing in 90 ° of steering procedures direction in flowing into impeller, simple self-consistentency import and export angle is disadvantageous for the actual acting ability of impeller, wherein, the angle of outlet of blade is commonly defined as the angle between blade outboard tangent line and blade outboard end points tangent line on blade excircle.Such as, as shown in Figure 6, conventional impellers for double suction, impeller outlet position is small in the end and big in the middle along the VELOCITY DISTRIBUTION in axis direction (Casing width direction), main cause is exactly that the impeller effect of prewhirling to gas makes the air-flow that impeller two ends enter impeller internal ramp up and rotate, near both ends of the surface, the air-flow in blade path easily produces boundary layer separation due to underspeed, come off formation turbulent eddy, cause that blade is to its actual acting scarce capacity, thus reducing the work efficiency of impeller.
Utility model content
Technical problem to be solved in the utility model is for above-mentioned prior art present situation, it is provided that a kind of can effectively reinforced blade for axis direction diverse location air-flow do work ability blade wheel structure.
The technical scheme that the above-mentioned technical problem of this utility model solution adopts is: this blade wheel structure, including mid-game and along mid-game circumferencial direction distribution blade, in the front end of described blade, drive end bearing bracket is installed, in the rear end of described blade, rear end cap is installed, it is characterized in that: the described blade angle of outlet α angle near drive end bearing bracket place is less than the blade angle of outlet γ angle near mid-game place, and the described blade angle of outlet β angle near rear end cap place is less than the blade angle of outlet γ angle near mid-game place.
Preferably, described blade is 160 ° of < α < 167 ° in the angle of the angle of outlet α at drive end bearing bracket place, described blade is 160 ° of < β < 167 ° in the angle of the angle of outlet β at rear end cap place, and described blade is 167 ° of < γ < 175 ° in the angle of outlet γ angle of mid-game place.
It is preferred that, described blade is identical in the angle of the angle of outlet β at rear end cap place with blade in the angle of the angle of outlet α at drive end bearing bracket place, and α=β=163 °, and described blade is γ=172 ° in the angle of the angle of outlet γ of mid-game place.So, blade rear and front end is relative to centre symmetrically structure.
Preferably, having the jack being circumferentially distributed in described mid-game, described blade is axially across corresponding jack spacing in mid-game.
Multiple mounting structure can be had between drive end bearing bracket, rear end cap and blade, preferably, described drive end bearing bracket has the front end installing hole being circumferentially distributed, described rear end cap has the rear end installing hole being circumferentially distributed, the front end of described blade is through described front end installing hole and tips upside down on drive end bearing bracket by the back-off sheet of vane nose, and the rear end of described blade is through described rear end installing hole and is tipped upside down on rear end cap by the back-off sheet of blade rear end.
Compared with prior art, the utility model has the advantage of: this blade wheel structure by being designed to less than the blade angle of outlet γ angle near mid-game place by the blade angle of outlet α angle near drive end bearing bracket place and the blade angle of outlet β angle near rear end cap place, namely utilize axial twist blade to change the exit angle of the axial diverse location of blade, blade wheel structure is made more to meet the Velocity Profiles of impeller internal, make blade for axis direction diverse location air-flow do work ability effectively strengthened, thus improving the work efficiency of impeller.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model embodiment;
Fig. 2 is the perspective exploded view of this utility model embodiment;
Fig. 3 be blade wheel structure shown in Fig. 1 A-A to structure cross-sectional schematic;
Fig. 4 be blade wheel structure shown in Fig. 1 B-B to structure cross-sectional schematic;
Fig. 5 be blade wheel structure shown in Fig. 1 C-C to structure cross-sectional schematic;
Fig. 6 is the blade exit velocity contour along Casing width direction of this utility model embodiment.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, this utility model is described in further detail.
As shown in Figures 1 to 5, the impeller in the present embodiment includes mid-game 1, blade 2, drive end bearing bracket 3 and rear end cap 4, and wherein, blade 2 is distributed through mid-game 1 and along mid-game circumferencial direction, and drive end bearing bracket 3 is arranged on the front end of blade 2, and rear end cap 4 is arranged on the rear end of blade 2.Specifically, mid-game 1 has the jack 11 being circumferentially distributed, blade 2 is axially across corresponding jack 11 spacing in mid-game 1, drive end bearing bracket 3 has the front end installing hole 31 being circumferentially distributed, rear end cap 4 has the rear end installing hole 41 being circumferentially distributed, the front end of blade 2 tips upside down on drive end bearing bracket 3 through front end installing hole 31 the back-off sheet 21 that bent by vane nose, and rear end installing hole 41 is passed in the rear end of blade 2 and the back-off sheet 21 that bent by blade rear end is tipped upside down on rear end cap 4.
In the present embodiment, the blade 2 angle of outlet at drive end bearing bracket 3 place is α, the blade 2 angle of outlet at rear end cap 4 place is β, the blade 2 angle of outlet at mid-game 1 place is γ, the span of α is 160 ° of < α < 167 °, the span of β is 160 ° of < β < 167 °, the span of γ is 167 ° of < γ < 175 °, and namely the blade 2 exit angle near rear and front end is more smaller than middle exit angle.Adopt after said structure, it is possible to make air-flow in the blade path near blade rear and front end actual to turn over angle little so that the channel outlet at this place is also relatively smooth and easy, namely speed tangential component is little, static pressure proportion is less than normal, but radial component promotes, and actual flow increases;And owing to fluid velocity greatly and exists the effect of prewhirling in the blade path near mid-game, gas can pass through the channel outlet at this place, thus in blade middle, actual acting is bigger than rear and front end, namely speed tangential component promotes, hydrostatic head also promotes, though radial component slightly declines, but owing to speed is high herein, thus relative actual flow declines inconspicuous.
As can be seen here, blade wheel structure in the present embodiment utilizes axial twist blade to change the exit angle of the axial diverse location of blade, blade wheel structure is made more to meet the Velocity Profiles of impeller internal, make blade for axis direction diverse location air-flow do work ability effectively strengthened, thus improve the work efficiency of impeller.Additionally, through test of many times, the optimal case of outlet blade angle is α=β=163 °, γ=172 °.
The foregoing is only preferred implementation of the present utility model; it should be pointed out that, for those of ordinary skills, without departing under principle premise of the present utility model; this utility model can carrying out multiple remodeling or improvement, these are regarded as within protection domain of the present utility model.

Claims (5)

1. a blade wheel structure, including mid-game (1) and along mid-game circumferencial direction distribution blade (2), in the front end of described blade (2), drive end bearing bracket (3) is installed, in the rear end of described blade (2), rear end cap (4) is installed, it is characterized in that: the described blade (2) angle of outlet α angle near drive end bearing bracket (3) place is less than the angle of outlet γ angle at close mid-game (1) place of blade (2), the described blade (2) angle of outlet β angle near rear end cap (4) place is less than the angle of outlet γ angle at close mid-game (1) place of blade (2).
2. blade wheel structure according to claim 1, it is characterized in that: described blade (2) is 160 ° of < α < 167 ° in the angle of the angle of outlet α at drive end bearing bracket (3) place, described blade (2) is 160 ° of < β < 167 ° in the angle of the angle of outlet β at rear end cap (4) place, and the described blade (2) angle of outlet γ angle at mid-game (1) place is 167 ° of < γ < 175 °.
3. blade wheel structure according to claim 2, it is characterized in that: described blade (2) is identical in the angle of the angle of outlet β at rear end cap (4) place with blade (2) in the angle of the angle of outlet α at drive end bearing bracket (3) place, and α=β=163 °, described blade (2) is γ=172 ° in the angle of the angle of outlet γ at mid-game (1) place.
4. the blade wheel structure according to any claim in claims 1 to 3, it is characterized in that: have the jack (11) being circumferentially distributed in described mid-game (1), described blade (2) is axially across corresponding jack (11) spacing in mid-game (1).
5. the blade wheel structure according to any claim in claims 1 to 3, it is characterized in that: on described drive end bearing bracket (3), have the front end installing hole (31) being circumferentially distributed, described rear end cap (4) has the rear end installing hole (41) being circumferentially distributed, the front end of described blade (2) is through described front end installing hole (31) and tips upside down on drive end bearing bracket (3) by the back-off sheet (21) of vane nose, the rear end of described blade (2) tips upside down on rear end cap (4) through described rear end installing hole (41) and by the back-off sheet (21) of blade rear end.
CN201620152534.0U 2016-02-29 2016-02-29 Impeller structure Active CN205401226U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620152534.0U CN205401226U (en) 2016-02-29 2016-02-29 Impeller structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620152534.0U CN205401226U (en) 2016-02-29 2016-02-29 Impeller structure

Publications (1)

Publication Number Publication Date
CN205401226U true CN205401226U (en) 2016-07-27

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109209989A (en) * 2018-08-27 2019-01-15 广东海信家电有限公司 A kind of centrifugal fan and range hood

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109209989A (en) * 2018-08-27 2019-01-15 广东海信家电有限公司 A kind of centrifugal fan and range hood

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