CN209959561U - High pneumatic load blade of centrifugal blower impeller - Google Patents

Abstract

The utility model discloses a high aerodynamic load blade of centrifugal blower impeller, high aerodynamic load blade is including being located forward formula blade section and backward formula blade section, forward formula blade section with backward formula blade section adopts radial formula blade section to connect, forward formula blade section length is greater than 2 times of backward formula blade section length and radial formula blade section length accounts for 8-12% of blade length; the utility model discloses can be so that centrifugal blower can show its aerodynamic loading performance of improvement more ground on effectively improving aerodynamic efficiency's the basis simultaneously, the especially adapted centrifugal blower who has higher requirement to aerodynamic loading uses the scene, has higher aerodynamic efficiency and lower noise simultaneously for prior art's preceding formula blade.

Description

High pneumatic load blade of centrifugal blower impeller

Technical Field

The utility model belongs to centrifugal blower product manufacturing field, concretely relates to high aerodynamic load blade of centrifugal blower impeller.

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.

From the above, it can be seen that the blades of the existing centrifugal blower impeller have advantages and disadvantages, and cannot have the performances of high aerodynamic efficiency and high aerodynamic load at the same time, and based on years of development experience in the field of fan products and theoretical knowledge of fluid flow mechanism, the inventor of the present application hopes to realize higher air intake efficiency and higher high aerodynamic load of the centrifugal blower by carrying out innovative structural design on the centrifugal blower impeller.

Disclosure of Invention

In view of this, the present invention provides a high aerodynamic loading blade of a centrifugal blower impeller, which can effectively improve aerodynamic efficiency of a centrifugal blower, and simultaneously improve aerodynamic loading performance of the centrifugal blower, and is very suitable for a centrifugal blower application scenario with higher requirements for aerodynamic loading, and has higher aerodynamic efficiency and lower noise compared with the prior art forward-moving blades.

The utility model adopts the technical scheme as follows:

the utility model provides a high aerodynamic load blade of centrifugal blower impeller, high aerodynamic load blade is including being located forward formula blade section and backward formula blade section, forward formula blade section with backward formula blade section adopts radial formula blade section to connect, forward formula blade section length is greater than 2 times of backward formula blade section length just radial formula blade section length accounts for 8-12% of blade length.

Preferably, the forward blade section length is 65% of the blade length, the radial blade section length is 10% of the blade length, and the backward blade section length is 25% of the blade length.

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 comprises an impeller disc, and the blades are positioned on the inner periphery of the impeller disc and are integrally cast and formed with the impeller disc by adopting an aluminum alloy material.

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 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 cross-sectional view of a centrifugal blower impeller in accordance with an embodiment of the present invention;

FIG. 2 is a side cross-sectional view of a centrifugal blower impeller in accordance with an embodiment of the present invention;

FIG. 3 is a schematic front view of a high aerodynamic loading blade according to an embodiment of the present invention;

FIG. 4 is a schematic side view of a high aerodynamic load blade according to an embodiment of the present invention;

fig. 5 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 centrifugal blower impeller's high aerodynamic load blade, high aerodynamic load blade are including being located forward to formula blade section and backward formula blade section, and forward to formula blade section and backward formula blade section adopt radial formula blade section to be connected, and forward to 2 times and radial formula blade section length that formula blade section length is greater than backward formula blade section length account for 8-12% of blade length.

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

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.

Referring to fig. 1 and 2, 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 inlet 213 communicated with an air outlet channel; each blade 220 comprises a forward blade section 220a located at one end close to the axial air inlet 212 and a backward blade section 220c located at one end close to the radial air inlet 213, and the forward blade section 220a and the backward blade section 220c are connected by a radial blade section 220 b;

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

further preferably, please refer to fig. 3 and 4, the blade 210 of the present embodiment is 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.

Preferably, referring to fig. 5, the present embodiment further provides a centrifugal blower 10, which includes a rotating spindle 11 drivingly connected to a rotating driving unit (not shown), an air inlet casing 12 integrally installed to the rotating spindle 11, a multi-stage impeller (not shown in fig. 5) installed in a middle casing 13, and an air outlet casing 14, wherein the impeller is the centrifugal blower impeller 200 as described above.

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 (4)

1. The high aerodynamic load blade of a centrifugal blower impeller is characterized in that the high aerodynamic load blade comprises a forward blade section and a backward blade section, wherein the forward blade section is connected with the backward blade section through a radial blade section, the length of the forward blade section is larger than 2 times that of the backward blade section, and the length of the radial blade section accounts for 8-12% of the length of the blade.

2. The centrifugal blower impeller high aerodynamic load blade of claim 1 wherein said forward blade section length is 65% of said blade length, said radial blade section length is 10% of said blade length, and said aft blade section length is 25% of said blade length.

3. The high aerodynamic load blade of a centrifugal blower wheel according to 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 high aerodynamic load blade of a centrifugal blower wheel according to claim 1, wherein said centrifugal blower wheel comprises an impeller disc, said blade being located on an inner periphery of said impeller disc and being integrally cast from an aluminum alloy material with said impeller disc.

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