CN203175979U - Rear-tilting type centrifugal fan blade - Google Patents
Rear-tilting type centrifugal fan blade Download PDFInfo
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- CN203175979U CN203175979U CN 201320162530 CN201320162530U CN203175979U CN 203175979 U CN203175979 U CN 203175979U CN 201320162530 CN201320162530 CN 201320162530 CN 201320162530 U CN201320162530 U CN 201320162530U CN 203175979 U CN203175979 U CN 203175979U
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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, blades and a flow guiding ring, wherein the number of the blades is 7; the blades are twisted from the air inlet ends to the air outlet ends; an upper air inlet angle is 15-25 degrees, a lower air inlet angle is less than 5 degrees, and both an upper air outlet angle and a lower air outlet angle are 20-40 degrees; the upper part of each blade is formed by a connecting area and a disconnecting area which are integrally connected, and the length of each connecting area accounts for 62%-68% of the length of the top part of each blade; and the area of an air inlet between any adjacent blades is 70%-75% of the area of a corresponding air outlet. 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 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 usability of BI centrifugation blade is mainly reflected in air quantity size and noise control aspect, air quantity size and noise just are mutual, the general big noise of air quantity is relatively just high, the little noise of air quantity is low naturally, the parameter that the usability of BI centrifugation blade relates to is a lot, for example the shape of leaf base plate, wheel hub, blade and baffle liner, size and Placement etc.Very reasonably the BI centrifugation blade is few in air quantity size and noise control in the market.
Summary of the invention
Goal of the invention of the present utility model is in order to enrich the kind of centrifugation blade, to disclose a kind of novel structure, the BI centrifugation blade that air quantity 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, comprise 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 material-saving die cavity is set in the blade, and the top of wheel hub is provided with the cylindrical plastic shaft hole sleeve that is connected as a single entity with it, and wheel hub is provided with a plurality of radiation holes; Described blade is 7, 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 angle is between 15 °-25 °, following air intake angle angle is less than 5 °, 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 and following air-out angle are all between 20 °-40 °, last air-out angle angle is less than following air-out angle angle, and the difference between last air-out angle angle and the following air-out angle angle is between 5 °-15 °; All the inner and outer ends that are arranged in the blade on the ring leaf base plate form circle and blade cylindrical in the blade respectively, and diameter of a circle is the diameter 70%-74% of blade cylindrical in the blade, and the diameter of blade cylindrical is between 420mm-480mm; 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, disconnected district is in the air intake direction of blade inboard, and the connection area is in the outside in disconnected district, and connection area length accounts for the 62%-68% of vane tip length; 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 97%-99% of blade outboard end height, and the height of blade outboard end is the 86%-90% of blade apex height; Air-admitting surface between the adjacent blades is the 70%-75% of the exhaust outlet area of correspondence arbitrarily.
As preferably, the height of blade medial extremity is the 97%-99% of blade outboard end height, and the height of blade outboard end is the 86%-90% of blade apex height; The length of material-saving die cavity is the 55%-62% of length of blade; Circular diameter is the 46%-51% of outside diameter in the described ring leaf base plate; The bottom of blade outboard end is concordant with ring leaf plate outer side limit; Hub height is the 90%-97% of impeller sidepiece height, and described impeller sidepiece height is the whole height of ring leaf base plate, blade and baffle liner; The height of described baffle liner is the 65%-72% of baffle liner width, and the height of baffle liner is the 47%-53% of blade exhaust outlet height; Guide face on the baffle liner is connected and composed by two sections different arc shaped surfaces of radius of the radian value, and its radius of the radian value of the arc shaped surface of its middle and upper part is between 10-15mm, and its radius of the radian value of the arc shaped surface of bottom is between 55-65mm; Adopt above-mentioned preference data to increase by 2% air quantity at least and noise rises not obvious.Air-admitting surface between the adjacent blades is the 72.%-72.5% of the exhaust outlet area of correspondence arbitrarily, obtains best static pressure, and efficient improves 6%-7%.
As preferably, the last air intake angle of blade is 21.8 °, and following air intake angle is 0.8 °, and last air-out angle is 24.8 °, and following air-out angle is 34 °; Circular diameter is 326.4mm in the blade, and the blade outside diameter is 450.2mm; The thickness size of blade is no more than 15mm, and the height of blade exhaust outlet is 92.8mm, and vane tip length is 145.9mm, and length of blade is 145.9mm, the height 92.8mm of blade outboard end, and the height of blade medial extremity is 91.6mm; Connection area length is 94.6mm, and the height of the tie point in connection area and disconnected district is 105.1mm; The length of material-saving die cavity is 84.9mm, and the widest position of material-saving die cavity is 7.5mm; Circular diameter is 218.8mm in the ring leaf base plate, and ring leaf base plate outside diameter is 450.5mm, and hub height is 100.1mm, and impeller sidepiece height is 104.5mm, and the height of baffle liner is 46mm, and the width of baffle liner is 66.7mm.Adopt the BI centrifugation blade utilization efficiency of above-mentioned optimum data best, air quantity maximum and noise are minimum.
As preferably, described radiation hole is six, the arrangements of six equidistant rules of radiation hole.
As preferably, stiffener is projection, and described auxiliary stiffener is groove.
As preferably, stiffener is groove, and described auxiliary stiffener is projection.
As preferably, be arranged with a plurality of sawtooth on the blade outside air-out end face, the outer ledge of baffle liner is provided with the flange that is connected as a single entity with it.
Adopted a kind of BI centrifugation blade of above-mentioned technological scheme, blade is 7, last air intake angle angle is between 15 °-25 °, following air intake angle angle is less than 5 °, last air-out angle and following air-out angle are all between 20 °-40 °, last air-out angle angle is less than following air-out angle angle, and the difference between last air-out angle angle and the following air-out angle angle is between 5 °-15 °, the last air intake angle of blade is different with following air intake angle angle, last air-out angle is different with following air-out angle angle, makes the air-out of blade be linear change along the blade height direction, effectively weakens the noise energy stack, can effectively weaken the noise energy stack, reduce noise.Disconnected district is in the air intake direction of blade inboard, increases incoming air area, and air quantity increases.The connection area is in the outside in disconnected district, and connection area length accounts for the 62%-68% of vane tip length, can guarantee the bulk strength of fan blade, can promote air quantity 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 97%-99% of blade outboard end height, the height of blade outboard end is the 86%-90% of blade apex height, and turnover wind angle changes mild, increases by 1% air quantity at least.Air-admitting surface between the adjacent blades is the 70%-75% of the exhaust outlet area of correspondence arbitrarily, obtains good static pressure, and air intake efficiency improves 2% at least.The advantage of this BI centrifugation blade is novel structure, and air quantity is big and noise is low.
Description of drawings
Fig. 1: the utility model embodiment's BI centrifugation blade structural representation.
Fig. 2: the schematic representation of the utility model embodiment's BI centrifugation blade bottom surface.
Fig. 3: the BI centrifugation blade side schematic view that baffle liner is not installed among the utility model embodiment.
Fig. 4: the BI centrifugation blade plan view one that baffle liner is not installed among the utility model embodiment.
Fig. 5: the BI centrifugation blade plan view two that baffle liner is not installed among the utility model embodiment.
Embodiment
Make a detailed explanation below in conjunction with Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5 embodiment of the present utility model.
As Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5 to shown in a kind of BI centrifugation blade, comprise ring leaf base plate 1, wheel hub 2, blade 3 and baffle liner 4, 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, material-saving die cavity 32 is set in the blade 3, the top of wheel hub 2 is provided with the cylindrical plastic shaft hole sleeve 5 that is connected as a single entity with it, be useful on the axis hole that connects motor shaft on the cylindrical plastic shaft hole sleeve 5, wheel hub 2 is provided with the arrangement of 21, six radiation holes 21 of six radiation holes equidistant rule centered by cylindrical plastic shaft hole sleeve 5.
All the inner and outer ends that are arranged in the blade on the ring leaf base plate 1 form circle and blade cylindrical in the blade respectively, and diameter of a circle is the diameter 70%-74% of blade cylindrical in the blade, and the diameter of blade cylindrical is between 420mm-480mm.Blade 3 tops are made of the connection area 33 that is connected as a single entity and disconnected district 34, the connection area 33 of blade and baffle liner 4 are fixed by ultrasonic welding, disconnected district 34 is in the air intake direction of blade inboard, connection area 33 is in the outside in disconnected district 34, connection area 33 length account for the 62%-68% of blade 3 top length, can guarantee 4 intensity that are connected of blade 3 and baffle liner, lifting air quantity that again can be suitable.33 places, connection area are provided with stiffener, baffle liner 4 is provided with the auxiliary stiffener with stiffener position and structure matching, the tie point in connection area 33 and disconnected district 34 is that the highest point of blade 4 is the summit, the height of blade 3 medial extremitys is 97%-99% of blade 3 outboard end height, the height of blade 3 outboard ends is 86%-90% of blade 3 apex height, and the air-admitting surface between the adjacent blades 3 is the 70%-75% of the exhaust outlet area of correspondence arbitrarily.
The height of blade medial extremity is the 97%-99% of blade outboard end height, the height of blade outboard end is the 86%-90% of blade apex height, wheel hub 2 highly is the 90%-97% of impeller sidepiece height, impeller sidepiece height is the whole height after ring leaf base plate 1, blade 3 and baffle liner 4 assemblings are finished, at least increase by 2% incoming air area, namely increase by 2% air quantity at least.The length of material-saving die cavity 32 is 55%-62% of blade 3 length.Circular diameter is the 46%-51% of outside diameter in the ring leaf base plate 1.The bottom of blade 3 outboard ends is concordant with ring leaf base plate 1 outer side.The height of baffle liner 4 is 65%-72% of baffle liner 4 width, the height of baffle liner 4 is 47%-53% of blade exhaust outlet height, guide face on the baffle liner 4 is connected and composed by two sections different arc shaped surfaces of radius of the radian value, its radius of the radian value of the arc shaped surface of its middle and upper part is between 10-15mm, and its radius of the radian value of the arc shaped surface of bottom is between 55-65mm.Adopt above-mentioned preference data to increase by 2% air quantity at least and noise rises not obvious.Air-admitting surface between the adjacent blades is the 72.%-72.5% of the exhaust outlet area of correspondence arbitrarily, obtains best static pressure, and efficient improves 6%-7%.
Be arranged with a plurality of sawtooth 31 on blade 3 outside air-out end faces, the outer ledge of baffle liner 4 is provided with the flange 41 that is connected as a single entity with it.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, auxiliary stiffener is the groove that mates with projection, in like manner, stiffener also can be groove, and auxiliary stiffener is the projection that mates with groove.
The parameter of above-mentioned BI centrifugation blade the best is as follows, and the last air intake angle a1 of blade 3 is 21.8 °, and following air intake angle a2 is 0.8 °, and last air-out angle b1 is 24.8 °, and following air-out angle b2 is 34 °.Circular diameter is 326.4mm in the blade 3, blade 3 outside diameters are 450.5mm, the thickness size of blade 3 is no more than 15mm, the height of blade exhaust outlet is 92.8mm, and blade 3 top length are 145.9mm, and blade 3 length are 145.9mm, the height 92.8mm of blade 3 outboard ends, the height of blade 3 medial extremitys is 91.6mm, and connection area 33 length are 94.6mm, and the height of the tie point in connection area 33 and disconnected district 34 is 105.1mm; The length of material-saving die cavity 32 is 84.9mm, and the widest position of material-saving die cavity 32 is 7.5mm.Circular diameter is 218.8mm in the ring leaf base plate 1, and ring leaf base plate 1 outside diameter is 450.5mm, and wheel hub 2 highly is 100.1mm, and impeller sidepiece height is 104.5mm, and the height of baffle liner 4 is 46mm, and the width of baffle liner 4 is 66.7mm.Adopt the BI centrifugation blade of said structure and parameter, under the prerequisite that air quantity increases, effectively reduced noise, in the market its air quantity of the similar centrifugation blade of Dimensions generally be 2200 cubic metres per hour, noise generally is 49 decibels, its air quantity of centrifugation blade that adopts above-mentioned parameter be 2300 cubic metres per hour, noise is 45 decibels, and namely air quantity is big and noise is low.
Claims (7)
1. BI centrifugation blade, comprise 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 material-saving die cavity is set in the blade, and the top of wheel hub is provided with the cylindrical plastic shaft hole sleeve that is connected as a single entity with it, and wheel hub is provided with a plurality of radiation holes; It is characterized in that described blade is 7, 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 angle is between 15 °-25 °, following air intake angle angle is less than 5 °, 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 and following air-out angle are all between 20 °-40 °, last air-out angle angle is less than following air-out angle angle, and the difference between last air-out angle angle and the following air-out angle angle is between 5 °-15 °; All the inner and outer ends that are arranged in the blade on the ring leaf base plate form circle and blade cylindrical in the blade respectively, and diameter of a circle is the diameter 70%-74% of blade cylindrical in the blade, and the diameter of blade cylindrical is between 420mm-480mm; 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, disconnected district is in the air intake direction of blade inboard, and the connection area is in the outside in disconnected district, and connection area length accounts for the 62%-68% of vane tip length; 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 97%-99% of blade outboard end height, and the height of blade outboard end is the 86%-90% of blade apex height; Air-admitting surface between the adjacent blades is the 70%-75% of the exhaust outlet area of correspondence arbitrarily.
2. a kind of BI centrifugation blade according to claim 1, the length that it is characterized in that the material-saving die cavity is the 55%-62% of length of blade; Circular diameter is the 46%-51% of outside diameter in the described ring leaf base plate; The bottom of blade outboard end is concordant with ring leaf plate outer side limit; Hub height is the 90%-97% of impeller sidepiece height, and described impeller sidepiece height is the whole height of ring leaf base plate, blade and baffle liner; The height of described baffle liner is the 65%-72% of baffle liner width, and the height of baffle liner is the 47%-53% of blade exhaust outlet height; Guide face on the baffle liner is connected and composed by two sections different arc shaped surfaces of radius of the radian value, and its radius of the radian value of the arc shaped surface of its middle and upper part is between 10-15mm, and its radius of the radian value of the arc shaped surface of bottom is between 55-65mm; Air-admitting surface between the adjacent blades is the 72.%-72.5% of the exhaust outlet area of correspondence arbitrarily.
3. a kind of BI centrifugation blade according to claim 2 is characterized in that the last air intake angle of blade is 21.8 °, and following air intake angle is 0.8 °, and last air-out angle is 24.8 °, and following air-out angle is 34 °; Circular diameter is 326.4mm in the blade, and the blade outside diameter is 450.2mm; The thickness size of blade is no more than 15mm, and the height of blade exhaust outlet is 92.8mm, and vane tip length is 145.9mm, and length of blade is 145.9mm, the height 92.8mm of blade outboard end, and the height of blade medial extremity is 91.6mm; Connection area length is 94.6mm, and the height of the tie point in connection area and disconnected district is 105.1mm; The length of material-saving die cavity is 84.9mm, and the widest position of material-saving die cavity is 7.5mm; Circular diameter is 218.8mm in the ring leaf base plate, and ring leaf base plate outside diameter is 450.5mm, and hub height is 100.1mm, and impeller sidepiece height is 104.5mm, and the height of baffle liner is 46mm, and the width of baffle liner is 66.7mm.
4. a kind of BI centrifugation blade according to claim 1 is characterized in that described radiation hole is six, the arrangement of six equidistant rules of radiation hole.
5. a kind of BI centrifugation blade according to claim 1 is characterized in that described stiffener is projection, and described auxiliary stiffener is groove.
6. a kind of BI centrifugation blade according to claim 1 is characterized in that described stiffener is groove, and described auxiliary stiffener is projection.
7. a kind of BI centrifugation blade according to claim 1 is characterized in that being arranged with a plurality of sawtooth on the described blade outside air-out end face, and the outer ledge of baffle liner is provided with the flange that is connected as a single entity with it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320162530 CN203175979U (en) | 2013-04-03 | 2013-04-03 | Rear-tilting type centrifugal fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320162530 CN203175979U (en) | 2013-04-03 | 2013-04-03 | Rear-tilting type centrifugal fan blade |
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| Publication Number | Publication Date |
|---|---|
| CN203175979U true CN203175979U (en) | 2013-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320162530 Expired - Lifetime CN203175979U (en) | 2013-04-03 | 2013-04-03 | Rear-tilting type centrifugal fan blade |
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| Country | Link |
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| CN (1) | CN203175979U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103185028A (en) * | 2013-04-03 | 2013-07-03 | 宁波朗迪叶轮机械有限公司 | Backward-inclined centrifugal fan vane |
| CN103967838A (en) * | 2014-05-14 | 2014-08-06 | 珠海格力电器股份有限公司 | Centrifugal fan blade |
-
2013
- 2013-04-03 CN CN 201320162530 patent/CN203175979U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103185028A (en) * | 2013-04-03 | 2013-07-03 | 宁波朗迪叶轮机械有限公司 | Backward-inclined centrifugal fan vane |
| CN103185028B (en) * | 2013-04-03 | 2016-02-24 | 宁波朗迪叶轮机械有限公司 | A kind of BI centrifugation blade |
| CN103967838A (en) * | 2014-05-14 | 2014-08-06 | 珠海格力电器股份有限公司 | Centrifugal fan blade |
| CN109162961A (en) * | 2014-05-14 | 2019-01-08 | 珠海格力电器股份有限公司 | Centrifugation blade |
| CN103967838B (en) * | 2014-05-14 | 2019-03-19 | 珠海格力电器股份有限公司 | Centrifugation blade |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130904 |