CN203175965U - Rear-tilting type centrifugal fan blade - Google Patents
Rear-tilting type centrifugal fan blade Download PDFInfo
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- CN203175965U CN203175965U CN 201320161238 CN201320161238U CN203175965U CN 203175965 U CN203175965 U CN 203175965U CN 201320161238 CN201320161238 CN 201320161238 CN 201320161238 U CN201320161238 U CN 201320161238U CN 203175965 U CN203175965 U CN 203175965U
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Abstract
The utility model relates to the field of ventilating equipment. A rear-tilting type centrifugal fan blade comprises a ring-shaped blade bottom plate, a hub, a flow guiding ring and a plurality of blades, wherein the upper part of each blade is formed by a connecting area and a disconnecting area which are integrally connected; the connecting area of each blade is fixedly welded with the flow guiding ring by ultrasonic wave, and each disconnecting area is positioned in the air inlet direction of the inner side of the related blade; each connecting area is provided with a reinforced member, and the flow guiding ring is provided with an auxiliary reinforced member which is matched with the position and the structure of the reinforced member; and the connecting point of each connecting area and the related disconnecting area is the highest position of each blade, i.e., the top point, the height of the inner side end of each blade is 91%-98% of that of the outer side end of the blade, and the height of the outer side end of each blade is 83%-92% of that of the top point of the blade. The rear-tilting type centrifugal fan blade has the advantages of novel structure, large air volume and low noise.
Description
Technical field
The utility model relates to the ventilation equipment field, relates in particular to a kind of BI centrifugation blade.
Background technique
The BI centrifugation blade is product commonly used in the ventilation equipment field, the BI centrifugation blade comprises ring leaf base plate, wheel hub, blade and baffle liner, vanes fixed is between ring leaf base plate and baffle liner, wheel hub and ring leaf base plate inboard are connected as a single entity, wheel hub is concentric with ring leaf base plate, the center at wheel hub top arranges axle sleeve, and motor shaft passes the axle sleeve upper shaft hole and drives the fan blade rotation during use.The deficiency that existing BI centrifugation blade exists is that air output is little, and noise is big.
Summary of the invention
Goal of the invention of the present utility model is to solve the deficiency that existing BI centrifugation blade exists, and discloses a kind of novel structure, the BI centrifugation blade that air output is big and noise is low.
In order to realize above-mentioned purpose, the utility model has adopted following technological scheme:
A kind of BI centrifugation blade comprises ring leaf base plate, wheel hub, baffle liner and multi-disc blade, and vanes fixed is between ring leaf base plate and baffle liner, and wheel hub and ring leaf base plate inboard are connected as a single entity wheel hub upper shaft hole cover; Blade top is made of the connection area that is connected as a single entity and disconnected district, and connection area and the baffle liner of blade are fixed by ultrasonic welding, and disconnected district is in the air intake direction of blade inboard, and the connection area is in the outside in disconnected district; The place, connection area is provided with stiffener, and baffle liner is provided with the auxiliary stiffener with stiffener position and structure matching; The tie point in connection area and disconnected district is that the highest point of blade is the summit, and the height of blade medial extremity is the 91%-98% of blade outboard end height, and the height of blade outboard end is the 83%-92% of blade apex height.
As preferably, blade air intake to outlet air end is distorted shape, the air intake angle of blade is divided into the following air intake angle near the last air intake angle of baffle liner and close ring leaf base plate, last air intake angle is different with following air intake angle angle, the air-out angle of blade is divided into the following air-out angle near the last air-out angle of baffle liner and close ring leaf base plate, last air-out angle angle is different with following air-out angle angle, make the air-out of blade be linear change along the blade height direction, effectively weaken the noise energy stack, can effectively weaken the noise energy stack, reduce noise.
As preferably, the last air intake angle of blade is 21 °, and following air intake angle is 1 °, and last air-out angle is 25 °, and following air-out angle is 33 °; The blade outboard end is the height 92.8mm of exhaust outlet, and the height of blade medial extremity is 90mm, and the height of the tie point in connection area and disconnected district is 105.1mm.
As preferably, stiffener is projection, and described auxiliary stiffener is groove.
As preferably, stiffener is groove, and described auxiliary stiffener is projection.
Adopted a kind of BI centrifugation blade of above-mentioned technological scheme, blade top is made of the connection area that is connected as a single entity and disconnected district, blade pass is crossed the connection area and is fixedlyed connected with baffle liner, disconnected district is in the air intake direction of blade inboard, the connection area is in the outside in disconnected district, the bulk strength of fan blade can be guaranteed, air quantity can be promoted again.The tie point in connection area and disconnected district is that the highest point of blade is the summit, the height of blade medial extremity is the 91%-98% of blade outboard end height, the height of blade outboard end is the 83%-92% of blade apex height, being exhaust outlet can reduce the noise of air-out greater than intake grill, adopts the blade structure of aforementioned proportion scope can reduce by 2 decibels noise at least.The place, connection area is provided with stiffener, and baffle liner is provided with the auxiliary stiffener with stiffener position and structure matching, the join strength height of blade and baffle liner.The advantage of this BI centrifugation blade is novel structure, and air output is big and noise is low.
Description of drawings
Fig. 1: the utility model embodiment's BI centrifugation blade structural representation.
Fig. 2: the BI centrifugation blade side schematic view that baffle liner is not installed among the utility model embodiment.
Fig. 3: the BI centrifugation blade plan view that baffle liner is not installed among the utility model embodiment.
Embodiment
Embodiment below in conjunction with Fig. 1, Fig. 2 and the model utility of Fig. 3 makes a detailed explanation.
As Fig. 1, Fig. 2 and a kind of BI centrifugation blade shown in Figure 3, mainly comprise ring leaf base plate 1, wheel hub 2, baffle liner 4 and multi-disc blade 3, blade 3 is fixed between ring leaf base plate 1 and the baffle liner 4, wheel hub 2 is connected as a single entity with ring leaf base plate 1 inboard, wheel hub 2 is concentric with ring leaf base plate 1, the shaft hole sleeve 5 that the center at wheel hub 2 tops is connected as a single entity with it is useful on the axis hole that connects motor shaft on shaft hole sleeve 5, wheel hub 2 is provided with a plurality of radiation holes 21.
33 places, connection area are provided with stiffener, and baffle liner 4 is provided with the auxiliary stiffener with stiffener position and structure matching, and stiffener is projection, and auxiliary stiffener is the groove that mates with projection.
Blade air intake to outlet air end is distorted shape, the air intake angle of blade is divided into the following air intake angle near the last air intake angle of baffle liner and close ring leaf base plate, last air intake angle is different with following air intake angle angle, the air-out angle of blade is divided into the following air-out angle near the last air-out angle of baffle liner and close ring leaf base plate, last air-out angle angle is different with following air-out angle angle, make the air-out of blade be linear change along the blade height direction, effectively weaken the noise energy stack, can effectively weaken the noise energy stack, reduce noise.Last air intake angle is the air intake surface top end with the opposite tangent direction of fan blade sense of rotation and the angle of blade air intake surface top circular arc tangential line, following air intake angle is air intake surface bottom place with the opposite tangent direction of fan blade sense of rotation and the angle of blade air intake surface bottom circular arc tangential line, last air-out angle is the outlet air surface top end with the opposite tangent direction of fan blade sense of rotation and the angle of blade outlet air surface top circular arc tangential line, and following air-out angle is place, outlet air surface bottom with the opposite tangent direction of fan blade sense of rotation and the angle of blade outlet air surface bottom circular arc tangential line.The last air intake angle of blade is 21 °, following air intake angle is 1 °, last air-out angle is 25 °, following air-out angle is 33 °, the blade outboard end is the height 92.8mm of exhaust outlet, the height of blade medial extremity is 90mm, and the height of the tie point in connection area 33 and disconnected district 34 is 105.1mm, can reduce by 2 decibels noise at least with respect to unidimensional fan blade
Claims (5)
1. a BI centrifugation blade comprises ring leaf base plate, wheel hub, baffle liner and multi-disc blade, and vanes fixed is between ring leaf base plate and baffle liner, and wheel hub and ring leaf base plate inboard are connected as a single entity wheel hub upper shaft hole cover; It is characterized in that blade top is made of the connection area that is connected as a single entity and disconnected district, connection area and the baffle liner of blade are fixed by ultrasonic welding, and disconnected district is in the air intake direction of blade inboard, and the connection area is in the outside in disconnected district; The place, connection area is provided with stiffener, and baffle liner is provided with the auxiliary stiffener with stiffener position and structure matching; The tie point in connection area and disconnected district is that the highest point of blade is the summit, and the height of blade medial extremity is the 91%-98% of blade outboard end height, and the height of blade outboard end is the 83%-92% of blade apex height.
2. a kind of BI centrifugation blade according to claim 1, it is characterized in that blade air intake to outlet air end is distorted shape, the air intake angle of blade is divided into the following air intake angle near the last air intake angle of baffle liner and close ring leaf base plate, last air intake angle is different with following air intake angle angle, the air-out angle of blade is divided into the following air-out angle near the last air-out angle of baffle liner and close ring leaf base plate, and last air-out angle angle is different with following air-out angle angle.
3. a kind of BI centrifugation blade according to claim 2 is characterized in that the last air intake angle of blade is 21 °, and following air intake angle is 1 °, and last air-out angle is 25 °, and following air-out angle is 33 °; The blade outboard end is the height 92.8mm of exhaust outlet, and the height of blade medial extremity is 90mm, and the height of the tie point in connection area and disconnected district is 105.1mm.
4. a kind of BI centrifugation blade according to claim 1 is characterized in that described stiffener is projection, and described auxiliary stiffener is groove.
5. a kind of BI centrifugation blade according to claim 1 is characterized in that described stiffener is groove, and described auxiliary stiffener is projection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320161238 CN203175965U (en) | 2013-04-02 | 2013-04-02 | Rear-tilting type centrifugal fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320161238 CN203175965U (en) | 2013-04-02 | 2013-04-02 | Rear-tilting type centrifugal fan blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203175965U true CN203175965U (en) | 2013-09-04 |
Family
ID=49072668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320161238 Expired - Lifetime CN203175965U (en) | 2013-04-02 | 2013-04-02 | Rear-tilting type centrifugal fan blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203175965U (en) |
-
2013
- 2013-04-02 CN CN 201320161238 patent/CN203175965U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130904 |