CN209959557U

CN209959557U - Centrifugal blower impeller and centrifugal blower thereof

Info

Publication number: CN209959557U
Application number: CN201920691926.8U
Authority: CN
Inventors: 宋波; 雷先华; 庄贤良
Original assignee: JIANGSU CHINFAN COMPRESSOR Inc
Current assignee: JIANGSU CHINFAN COMPRESSOR Inc
Priority date: 2019-05-15
Filing date: 2019-05-15
Publication date: 2020-01-17
Anticipated expiration: 2029-05-15

Abstract

The utility model discloses a centrifugal blower impeller and a centrifugal blower thereof, the centrifugal blower impeller adopts an impeller disc which is integrally cast and formed and a plurality of blades which are positioned on the impeller disc, each blade is evenly distributed on the inner periphery of the impeller disc, the impeller disc is provided with a rotating shaft hole which is fixedly installed and connected with a rotating main shaft of the centrifugal blower, an axial air inlet which is communicated with an air inlet channel and a radial air outlet which is communicated with an air outlet channel; each blade comprises a forward blade section and a backward blade section, wherein the forward blade section is positioned at one end close to the axial gas inlet, the backward blade section is positioned at one end close to the radial gas outlet, and the forward blade section and the backward blade section are connected by adopting a radial blade section; the utility model discloses a carry out special structural design to impeller blade, guarantee with the unchangeable prerequisite of current impeller dish size standard under for centrifugal blower has the dual technological effect of high aerodynamic efficiency and high aerodynamic load simultaneously.

Description

Centrifugal blower impeller and centrifugal blower thereof

Technical Field

The utility model belongs to centrifugal blower product manufacturing field, concretely relates to centrifugal blower impeller, the utility model discloses centrifugal blower that this centrifugal blower impeller used has still been related to.

Background

The working principle of the centrifugal blower is mainly that a plurality of rotating impellers are utilized to do work on gas, the kinetic energy of the gas is increased, and then the pressure of the gas is improved through the centrifugal action and the diffusion process, so that certain air volume and air pressure are achieved, and the technical effect of large-flow high-pressure air supply is achieved. The centrifugal blower has better high-flow high-pressure air supply effect, so the centrifugal blower is widely applied to the fields of sewage treatment, power plant desulfurization and other industries.

In the prior art, the centrifugal blower mainly comprises a rotating main shaft in transmission connection with a rotating driving unit, an air inlet casing integrally installed with the rotating main shaft, an impeller installed in a middle casing, an air outlet casing and other structures, and the shape and the number of blades on the impeller and the shape of a blade disc are core factors determining the pneumatic efficiency of the centrifugal blower. In order to meet the performance requirements of various fields, people usually design blades of an impeller of a centrifugal blower into a backward type, a forward type and a radial type, wherein the bending direction of the backward type blades is the same as the movement track of gas, the pneumatic efficiency is high, the noise is low, and the pneumatic load is low; the bending direction of the forward type blades is opposite to the motion track of gas, the pneumatic load is high, but the direction of the gas is forcibly changed by the blades, so that the pneumatic efficiency is low and the noise is high; the bending direction of the radial type blades is perpendicular to the motion trail of the gas, and the relevant performance of the radial type blades is between that of the backward type blades and that of the forward type blades.

Based on years of development experience in the field of fan products and theoretical knowledge of fluid flow mechanisms, the invention hopes to realize higher air inlet efficiency and higher high aerodynamic load of the centrifugal blower by carrying out innovative structural design on the impeller of the centrifugal blower.

Disclosure of Invention

In view of this, the present invention provides a centrifugal blower impeller and a centrifugal blower thereof, which have the dual technical effects of high aerodynamic efficiency and high aerodynamic load simultaneously by designing the impeller blades in a special structure, and ensuring the same size standard of the existing impeller plate.

The utility model adopts the technical scheme as follows:

a centrifugal blower impeller is characterized in that an impeller disc formed by integral casting and a plurality of blades positioned on the impeller disc are adopted, each blade is uniformly distributed on the inner periphery of the impeller disc, and the impeller disc is provided with a rotating shaft hole fixedly installed and connected with a rotating main shaft of a centrifugal blower, an axial air inlet communicated with an air inlet channel and a radial air outlet communicated with an air outlet channel; wherein, every the blade is including being located and being close to the preceding formula blade section of axial air inlet one end and being located and being close to the backward formula blade section of radial gas vent one end, preceding formula blade section with backward formula blade section adopts radial formula blade section to connect.

Preferably, the number of the blades is 8-16.

Preferably, the air inlet angle of the forward blade section is in the range 35-75 °; the air outlet angle of the backward blade section ranges from 25 to 65 degrees.

It should be noted that the air inlet angle and the air outlet angle of the present invention refer to the radial deviation angles of the corresponding blade segment and the impeller.

Preferably, the centrifugal blower impeller is integrally cast and molded by adopting an aluminum alloy material.

Preferably, a centrifugal blower comprises a rotating main shaft in transmission connection with a rotating driving unit, an air inlet casing integrated with the rotating main shaft in installation connection, a multi-stage impeller installed in a middle casing, and an air outlet casing, wherein the impeller is the centrifugal blower impeller.

The utility model provides an adopt the preceding formula blade section as the import, the impeller structure of backward formula blade section as the export, this structure adopts the radial formula blade section that is located the middle part to realize the connection to the two curved leaf segments of preceding formula and backward formula simultaneously, this structure has both kept the high and small advantage of noise of aerodynamic efficiency that traditional backward formula impeller had, and its preceding formula blade section makes the utility model discloses pneumatic load is obviously improved simultaneously, consequently uses the utility model provides a centrifugal blower impeller structure under the prerequisite of guaranteeing not to change with current impeller dish size standard, through carrying out special structural design to the blade of impeller for centrifugal blower has high pneumatic efficiency and high pneumatic load's dual technological effect simultaneously; on the other hand, the centrifugal blower impeller of the utility model is integrally cast and formed, which is convenient for processing and manufacturing and is easy to realize the implementation of the impeller blade scheme of the utility model;

the utility model discloses a large amount of experiments are carried out three-dimensional gas dynamics CFD simultaneously and are calculated, carry out deep analysis to impeller flow mechanism, further preferably propose set up the quantity of the utility model discloses blade 8-16, through carrying out this special design to the structure and the quantity of impeller blade, can make centrifugal blower more excellent in the performance that has high aerodynamic efficiency and high aerodynamic load dual technological effect simultaneously;

the utility model discloses have performance difference demand to concrete application scene, still further carry out the preferred design scheme of proportion to effectively satisfy these different demands respectively through to preceding formula blade section and backward formula blade section:

the utility model preferably provides a blade double-bending boundary structure design that the forward blade section and the backward blade section are symmetrically distributed, so that the centrifugal blower can obtain basically similar technical effects of high pneumatic efficiency and high pneumatic load, the performance is balanced, and the centrifugal blower is very suitable for the application scene of the centrifugal blower with higher requirements on pneumatic efficiency and pneumatic load;

the utility model discloses still further preferably provide preceding formula blade segment length and be greater than 2 times high aerodynamic load blade structural design of backward formula blade segment length, can show its aerodynamic load performance that improves simultaneously more on can making centrifugal blower effectively improve the basis of aerodynamic efficiency, especially adapted has the centrifugal blower application scene of higher requirement to aerodynamic load, has higher aerodynamic efficiency and lower noise simultaneously for prior art preceding formula blade.

Drawings

Fig. 1 is a front sectional view of a centrifugal blower impeller in embodiment 1 of the present invention;

fig. 2 is a side sectional view of a centrifugal blower impeller in embodiment 1 of the present invention;

fig. 3 is a schematic front structural view of a blade in embodiment 1 of the present invention;

FIG. 4 is a schematic side view of a blade according to embodiment 1 of the present invention;

fig. 5 is a front sectional view of a centrifugal blower impeller in embodiment 2 of the present invention;

fig. 6 is a side sectional view of a centrifugal blower impeller in embodiment 2 of the present invention;

fig. 7 is a schematic front structural view of a blade in embodiment 2 of the present invention;

fig. 8 is a schematic side view of a blade according to embodiment 2 of the present invention;

fig. 9 is a schematic structural view of a centrifugal blower according to an embodiment of the present invention.

Detailed Description

The embodiment of the utility model discloses a centrifugal blower impeller, which adopts an impeller disc formed by integral casting and a plurality of blades positioned on the impeller disc, each blade is uniformly distributed on the inner periphery of the impeller disc, the impeller disc is provided with a rotating shaft hole fixedly installed and connected with a rotating main shaft of the centrifugal blower, an axial air inlet communicated with an air inlet channel and a radial air outlet communicated with an air outlet channel; wherein, every blade is including being located the preceding formula blade section that is close to axial air inlet one end and being located the backward formula blade section that is close to radial gas vent one end, and the preceding formula blade section adopts radial formula blade section to be connected with backward formula blade section.

The embodiment of the utility model provides a centrifugal blower is still disclosed, include the rotary main shaft of being connected with the transmission of rotary driving unit, with rotary main shaft erection joint casing that admits air as an organic whole, install the multistage impeller in the middle part casing, the casing of giving vent to anger, the impeller adopts as above centrifugal blower impeller.

The embodiment of the utility model provides an adopt forward-facing formula blade section as the import, backward-facing formula blade section is as the impeller structure of export, and this structure adopts the radial formula blade section that is located the middle part to realize the connection to forward-facing formula and backward-facing formula double bent blade section simultaneously, and this structure has both kept the high advantage of aerodynamic efficiency and noise little that traditional backward-facing formula impeller had, and its forward-facing formula blade section makes the utility model discloses pneumatic load is obviously improved simultaneously, therefore uses the centrifugal blower impeller structure that the embodiment of the utility model provides under the prerequisite of guaranteeing to be unchangeable with current impeller dish size standard, through carrying out special structural design to the blade of impeller, makes the centrifugal blower have high aerodynamic efficiency and high pneumatic load's dual technical effect simultaneously; on the other hand, the utility model provides a centrifugal blower impeller adopts integrative casting shaping, makes things convenient for the manufacturing, easily realizes the utility model discloses the implementation of impeller blade scheme.

In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

Example 1:

referring to fig. 1 and 2, the centrifugal blower impeller 100 is formed by integrally casting an aluminum alloy on an impeller disc 110 and a plurality of blades 120 located on the impeller disc 110, each blade 120 is uniformly distributed on the inner circumference of the impeller disc 110, the impeller disc 110 is provided with a rotating shaft hole 111 fixedly connected with a rotating main shaft of the centrifugal blower, an axial air inlet 112 communicated with an air inlet channel, and a radial air outlet 113 communicated with an air outlet channel; wherein each blade 120 comprises a forward blade section 120a located at an end close to the axial inlet 112 and a backward blade section 120c located at an end close to the radial outlet 113, and the forward blade section 120a and the backward blade section 120c are connected by a radial blade section 120 b;

preferably, in the present embodiment, the number of the blades 120 is 8 to 16; particularly preferably, in the present embodiment, the number of the blades 120 is 8; the forward blade section 120a has an inlet angle in the range of 35-75 °; the air outlet angle of the backward blade section 120c ranges from 25 degrees to 65 degrees;

further preferably, referring to fig. 3 and 4, the length 120a of the forward blade section and the length 120c of the backward blade section of the blade 120 of the present embodiment are equal, and the length of the radial blade section 120b occupies 8-12% of the length of the blade 120; specifically, preferably, in this embodiment, the length 120b of the radial blade segment accounts for 10% of the length of the blade 120, and the specific structural design of the blade 120 in this embodiment 1 enables the forward blade segment 120a and the backward blade segment 120c to be symmetrically distributed, so that the technical effects of basically similar high aerodynamic efficiency and high aerodynamic load can be obtained, the performance is more balanced and compromised, and the centrifugal blower is very suitable for the application scenario of the centrifugal blower with higher requirements on aerodynamic efficiency and aerodynamic load.

Example 2:

referring to fig. 5 and 6, the centrifugal blower impeller 200 is an impeller disc 210 integrally cast and formed by aluminum alloy and a plurality of blades 220 located on the impeller disc, each blade 220 is uniformly distributed on the inner circumference of the impeller disc 210, and the impeller disc 210 is provided with a rotating shaft hole 211 fixedly connected with a rotating main shaft of the centrifugal blower, an axial air inlet 212 communicated with an air inlet channel, and a radial air outlet 213 communicated with an air outlet channel; wherein each vane 220 comprises a forward vane segment 220a located at an end close to the axial inlet 212 and a backward vane segment 220c located at an end close to the radial outlet 213, and the forward vane segment 220a and the backward vane segment 220c are connected by a radial vane segment 220 b;

preferably, in the present embodiment, the number of the blades 210 is 8 to 16; particularly preferably, in the present embodiment, the number of the blades 210 is 8; the forward blade section 220a has an inlet angle in the range of 35-75 °; the air outlet angle of the backward blade section 220c ranges from 25 degrees to 65 degrees;

further preferably, please refer to fig. 7 and 8, the blade 210 of the present embodiment adopts a high aerodynamic load blade, and the specific scheme is as follows: the forward blade section 220a is 2 times longer than the aft blade section 220c and the radial blade section 220b is 8-12% longer than the blade 220; specifically, preferably, in this embodiment, the length of the forward blade section 220a accounts for 65% of the length of the blade 220, the length of the radial blade section 220b accounts for 10% of the length of the blade 220, and the length of the backward blade section 220c accounts for 25% of the length of the blade 220, and the specific structural design of the blade 220 in this embodiment 2 makes the forward blade section 220a significantly larger than the backward blade section 220c, and the structure of the backward blade section 220c can also effectively improve the aerodynamic efficiency of the centrifugal blower, and at the same time, the aerodynamic load performance of the centrifugal blower can be further significantly improved by increasing the proportion of the forward blade section 220a, so that the centrifugal blower is very suitable for the application scenario of the centrifugal blower with higher requirements for aerodynamic load, and has higher aerodynamic efficiency and lower noise compared with the forward blade centrifugal blower in the prior art.

Example 3:

preferably, referring to fig. 9, in this embodiment 3, a centrifugal blower 10 is proposed, which includes a rotating spindle 11 drivingly connected to a rotating drive unit (not shown), an air inlet casing 12 integrally installed with the rotating spindle 11, a multi-stage impeller (not shown in fig. 9) installed in a middle casing 13, and an air outlet casing 14, where the impeller is the centrifugal blower impeller 100 described in embodiment 1 or the centrifugal blower impeller 200 described in embodiment 2.

The embodiment of the application carries out three-dimensional aerodynamic CFD calculation simultaneously through a large amount of experiments, carries out deep analysis to impeller flow mechanism, and this embodiment proposes the impeller that the quantity set up to 8-16 blades (the impeller quantity that adopts when the concrete implementation can be optimized according to different flow and the requirement of stepping up and select, in order to reach best aerodynamic effect), for setting up to be less than 8 or more than 16 impeller schemes, can make centrifugal blower more excellent in the performance that has the dual technological effect of high aerodynamic efficiency and high aerodynamic load simultaneously.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The centrifugal blower impeller is characterized in that an impeller disc formed by integral casting and a plurality of blades positioned on the impeller disc are adopted, each blade is uniformly distributed on the inner periphery of the impeller disc, and the impeller disc is provided with a rotating shaft hole fixedly connected with a rotating main shaft of a centrifugal blower, an axial air inlet communicated with an air inlet channel and a radial air outlet communicated with an air outlet channel; wherein, every the blade is including being located and being close to the preceding formula blade section of axial air inlet one end and being located and being close to the backward formula blade section of radial gas vent one end, preceding formula blade section with backward formula blade section adopts radial formula blade section to connect.

2. The centrifugal blower wheel according to claim 1, wherein the number of blades is 8-16.

3. The centrifugal blower impeller of claim 1 wherein the forward blade section has an inlet angle in the range of 35-75 °; the air outlet angle of the backward blade section ranges from 25 to 65 degrees.

4. The centrifugal blower wheel according to claim 1, wherein the centrifugal blower wheel is integrally cast from an aluminum alloy material.

5. A centrifugal blower comprising a rotary main shaft in transmission connection with a rotary driving unit, an air inlet housing integrally mounted with the rotary main shaft, a multi-stage impeller mounted in a middle housing, and an air outlet housing, wherein the impeller is the centrifugal blower impeller according to any one of claims 1 to 4.