CN203175959U

CN203175959U - Centrifugal blower

Info

Publication number: CN203175959U
Application number: CN 201320161201
Authority: CN
Inventors: 高文铭; 韩小红; 施建立
Original assignee: Ningbo Langdi Impeller Machinery Co Ltd
Current assignee: Ningbo Langdi Impeller Machinery Co Ltd
Priority date: 2013-04-02
Filing date: 2013-04-02
Publication date: 2013-09-04
Anticipated expiration: 2023-04-02

Abstract

The utility model relates to the field of ventilation equipment. A centrifugal blower comprises an annular blade bottom plate, a hub, a diversion ring and a plurality of blades, wherein parts from the air inlet ends to the air outlet ends of the blades are twisted, and an upper air inlet angle and a lower air inlet angle are different and not more than 10 degrees; an upper air outlet angle and a lower air outlet angle are different and between 20 degrees and 45 degrees; and an air inlet area between arbitrary adjacent blades accounts for 76%-85% of a corresponding air outlet area. The centrifugal blower has the advantages of ingenious structure, large air volume and low noise.

Description

Centrifugal blower

Technical field

The utility model relates to the ventilation equipment field, relates in particular to a kind of centrifugal blower.

Background technique

Centrifugal blower is product commonly used on the air-conditioning, centrifugal blower 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, the center at wheel hub top arranges axle sleeve, and motor shaft passes the rotation of axle sleeve upper shaft hole impeller during use.The usability of centrifugal blower 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 centrifugal blower 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 centrifugal blower 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 centrifugal blower that air quantity is big and noise is low.

In order to realize above-mentioned purpose, the utility model has adopted following technological scheme:

Centrifugal blower, comprise ring leaf base plate, wheel hub, baffle liner and multi-disc blade, the multi-disc 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, 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, and last air intake angle is different with following air intake angle angle and all be not more than 10 °; The air-out angle of blade is divided near the last air-out angle of baffle liner with near the following air-out angle of ring leaf base plate, last air-out angle and following air-out angle angle difference and all between 20 °-45 °; Air-admitting surface between the adjacent blades is the 76%-85% of the exhaust outlet area of correspondence arbitrarily.

As preferably, last air intake angle angle is less than air intake angle angle down, and last air-out angle angle is less than descending air-out angle angle, and the difference between last air-out angle angle and the following air-out angle angle is between 5 °-18 °, and the noise unconspicuous situation that rises adds 2% air quantity down to reducing.

As preferably, the air-admitting surface between the adjacent blades is the 79%-80% of corresponding exhaust outlet area arbitrarily, and last air intake angle is 1 °, and following air intake angle is 7 °, and last air-out angle is 26 °, and following air-out angle is 39 °, and air quantity maximum and noise are minimum.

As preferably, 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.

Adopted the centrifugal blower of above-mentioned technological scheme, blade air intake to outlet air end is distorted shape, last air intake angle is different with following air intake angle angle and all be not more than 10 °, last air-out angle and following air-out angle angle are different and all between 20 °-45 °, make the air-out of blade be linear change along the blade height direction, can effectively weaken the noise energy stack, reduce noise.Air-admitting surface between the adjacent blades is the 76%-85% of the exhaust outlet area of correspondence arbitrarily, obtains good static pressure, and air intake efficiency improves 2% at least.The advantage of this centrifugal blower is novel structure, and air quantity is big and noise is low.

Description of drawings

Fig. 1: the utility model embodiment's centrifugal blower structural representation.

Fig. 2: the centrifugal blower schematic representation one that baffle liner is not installed among the utility model embodiment.

Fig. 3: the centrifugal blower schematic representation two that baffle liner is not installed among the utility model embodiment.

Embodiment

Below in conjunction with Fig. 1, Fig. 2 and Fig. 3 embodiment of the present utility model is made a detailed explanation.

As Fig. 1, Fig. 2 and centrifugal blower shown in Figure 3, mainly comprise ring leaf base plate 1, wheel hub 2, baffle liner 4 and multi-disc blade 3, multi-disc blade 3 is fixed between ring leaf base plate 1 and the baffle liner 4, and wheel hub 2 is connected as a single entity with ring leaf base plate 1 inboard.

Blade 3 air intakes to outlet air end is distorted shape, the air intake angle of blade is divided into the following air intake angle a2 near the last air intake angle a1 of baffle liner 4 and close ring leaf base plate 1, last air intake angle a1 and following air intake angle a2 angle all are not more than 10 °, and go up air intake angle a1 angle less than following air intake angle a2 angle.The air-out angle of blade is divided into the following air-out angle b2 near 1 plate at the bottom of the last air-out angle b1 of baffle liner 4 and the close ring leaf, last air-out angle b1 and following air-out angle b2 are all between 20 °-45 °, last air-out angle b1 angle is less than following air-out angle angle b2, and the difference between last air-out angle b1 angle and the following air-out angle angle b2 is between 5 °-18 °.Last air intake angle a1 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, and following air intake angle a2 is place, air intake surface bottom 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 b1 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 b2 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.Last air intake angle a1 is different with following air intake angle a2 angle, and last air-out angle b1 is different with following air-out angle b2 angle, makes the air-out of blade 3 be linear change along the blade height direction, can effectively weaken the noise energy stack, reduces noise 2dB at least.

Arbitrarily the air-admitting surface A between the adjacent blades 3 is the 76%-85% of corresponding exhaust outlet area B, and namely above-below direction is between ring leaf base plate 1 and the baffle liner 4, left and right directions is in air-admitting surface A and exhaust outlet area B between the adjacent blades 3.

Blade 3 generally is 5,7,8 or 9.Ring leaf base plate 1 external diameter is between 420mm-480mm, air-admitting surface A between the adjacent blades 3 is the 79%-80% of the exhaust outlet area B of correspondence arbitrarily, can obtain best static pressure, last air intake angle a1 is 1 °, following air intake angle a2 is 7 °, last air-out angle b1 is 26 °, air quantity maximum and noise were minimum when following air-out angle b2 was 39 °, in the market its air quantity of the similar centrifugal blower of Dimensions generally be 2200 cubic metres per hour, noise generally is 49 decibels, its air quantity of centrifugal blower that adopts above-mentioned parameter be 2300 cubic metres per hour, noise is 43 decibels, namely air quantity is big and noise is low.

Claims

1. centrifugal blower, comprise ring leaf base plate, wheel hub, baffle liner and multi-disc blade, the multi-disc 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, 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, and last air intake angle is different with following air intake angle angle and all be not more than 10 °; The air-out angle of blade is divided near the last air-out angle of baffle liner with near the following air-out angle of ring leaf base plate, last air-out angle and following air-out angle angle difference and all between 20 °-45 °; Air-admitting surface between the adjacent blades is the 76%-85% of the exhaust outlet area of correspondence arbitrarily.

2. centrifugal blower according to claim 1 is characterized in that air intake angle angle less than following air intake angle angle, and 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 °-18 °.

3. centrifugal blower according to claim 1 is characterized in that the air-admitting surface between any adjacent blades is the 79%-80% of the exhaust outlet area of correspondence, and last air intake angle is 1 °, and following air intake angle is 7 °, and last air-out angle is 26 °, and following air-out angle is 39 °.

4. centrifugal blower according to claim 1, it is characterized in that the 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.