CN205823723U - Centrifugal blower impeller - Google Patents

Abstract

The utility model discloses a kind of centrifugal blower impeller, this impeller includes backboard, cover plate and the high-order SPL shape blade radially distributed in the middle of it around impeller central, wherein, inlet blade angle is 60 degree, the angle of outlet is 10 degree, blade exit point drift angle is 24 degree, and blade inlet edge is circular arc.This utility model takes full three-dimensional pneumatic to design analytical technology highway route design, and optimize through improving cavity, complete machine aeroperformance coherence, ensure that the process that gas flowing gradually loads in passage is uniform, while making aerator can realize high pressure-charging under minor diameter, also there is the advantages such as efficiency is high, working range is broad.

Description

Centrifugal blower impeller

Technical field

This utility model relates to a kind of centrifugal blower, particularly relates to a kind of efficiently high pressure-charging centrifugal blower impeller.

Background technology

Pressure height pressed by centrifugal gas compression equipment, is divided into centrifugal compressor, centrifugal blower, centrifugal fan.Respectively From applying pressure scope be: centrifugal compressor>150kPa, centrifugal blower 20-150kPa, centrifugal fan<20kPa.From The pressure of heart aerator, between centrifugal compressor and centrifugal fan, serves the effect formed a connecting link, whole centrifugal Compression equipment belongs to medium-voltage equipment, it is possible to be interpreted as the compressor of low pressure or the blower fan of high pressure.

The research and development of cfentrifugal blower and manufacture have the highest professional technique challenge, and subject relates to aerodynamics, consolidates Mechanics, the mechanics of materials, rotor dynamics etc., but also depend on the level of development of other industry and corollary equipment, as material, Casting, machine add, assemble, test, electric and electronic, control, Optimized System Design, engineering system management etc., therefore its manufacturing technology Difficulty is the biggest.Especially as the impeller of one of cfentrifugal blower core component, its design includes runner design, theoretical meter Calculation, empirical evaluation etc., the loss that fluid should be made to flow in design process is the least with raising efficiency, makes the liter of machine again Pressure energy overcomes and high the most also may accomplish make high efficiency condition range the widest to reduce progression in tandem as far as possible, this One process is extremely complex, the most thus causes existing impeller generally to there is following deficiency:

(1) being difficult to the contradiction solving boost capability with efficiency, the impeller that boost capability is high is the most inefficient, and efficiency is high The universal boost capability of impeller is low；

(2) even if close to preferable high boost capability and high efficiency balance, but the efficient working range of impeller is the most inadequate Width, makes the performance blemish in an otherwise perfect thing of aerator；

Therefore, how the design of centrifugal blower impeller realizes efficiency height, boost capability is high, working range is broad, simultaneously Meet Structural strength calls and process for machining and manufacturing requirement, become pendulum problem in face of current impeller R & D design worker.

Utility model content

The problem existed for prior art, the purpose of this utility model is to provide a kind of high efficiency, high boost capability Centrifugal blower impeller.

For achieving the above object, the utility model proposes a kind of centrifugal blower impeller, it include backboard, cover plate, with And the high-order SPL shape blade that centre radially distributes around impeller central.Wherein, inlet blade angle is 60 degree, Outlet blade angle is 24 degree for-10 degree, blade exit point drift angle.Blade inlet edge is circular arc.

In this utility model, term " inlet blade angle " refers to the angle of entrance location tangent line and RADIAL, term " outlet blade angle " refers to the angle of exit position tangent line and RADIAL.Term " blade exit point drift angle " refers to import and export Point respectively with axial connecting line after angle.

Performance as the impeller of one of centrifugal blower core component is directly connected to the performance of whole aerator, this reality Take full three-dimensional pneumatic to design analytical technology highway route design with novel, and aeroperformance coherence is excellent through improving cavity, complete machine Change the blower wheel obtained, can guarantee that the process that gas flowing gradually loads in passage is uniform；Adverse pressure gradient along streamline Distribution optimization controls, and effectively inhibits the development of boundary region to thicken, in off-design point operating conditions boundary layer separation degree It is little, it is to avoid flowing produces big vortex, it is achieved thereby that the high efficiency flow of gas, loses low, and its efficiency is up to more than 85%, The efficiency of the compression botanical origin installing this impeller is up to more than 80%, under the impeller diameter of about 700mm, at power frequency rotating speed Under (3000 turns per minute), its boosting capability i.e. may be up to more than 12KPa, makes aerator can realize under minor diameter, the slow-speed of revolution High pressure-charging, the most also has the feature such as high efficiency, wide working range.

Accompanying drawing explanation

Fig. 1 is the axis side view of one embodiment of this utility model centrifugal blower impeller；

Fig. 2 is Fig. 1 impeller axial cross-sectional view；

Fig. 3 is Fig. 1 impeller radial section view；

Fig. 4 is that the blade mesoprosopy line coordinates of Fig. 1 impeller represents schematic diagram；

Fig. 5 is backboard and the cover plate pipes' analysis coordinate representation schematic diagram of Fig. 1 impeller.

Detailed description of the invention

Below in conjunction with accompanying drawing, specific embodiment of the utility model is described.

See Fig. 1, Fig. 2 and Fig. 3, include backboard 1, cover plate 2, Yi Jiqi according to centrifugal blower impeller of the present utility model The middle high-order SPL shape blade 3 radially distributed around impeller central.

In a specific embodiment, 19 blades can be had uniform around impeller central.But those skilled in the art Should be understood that according to different concrete conditions, can have different number of blade.

In this utility model, inlet blade angle refers to the angle of entrance location tangent line and RADIAL, and outlet blade angle is Refer to the angle of exit position tangent line and RADIAL, blade exit point drift angle refer to ingress-egress point respectively with axial connecting line after folder Angle.In the specific embodiment shown in Fig. 4, inlet blade angle can be 60 degree, and outlet blade angle can be-10 degree, and blade Exit point drift angle can be 24 degree.

A kind of concrete space shape of blade mesoprosopy line is limited below by the coordinate figure of coordinate system as shown in Figure 4 Shape.Coordinate unit be D/100, D be impeller diameter.

After each coordinate points respectively smooth connection, i.e. form a smooth blade mesoprosopy line 11, this molded line is hung down Straight in X/Y plane biaxial tension certain distance, i.e. form the middle face of blade.Blade will smooth half thickness that extends towards both sides again Angle value (one-tenth-value thickness 1/10 typically takes about the 6% of impeller diameter), i.e. obtains the basic 3D shape of blade sheet body.

A kind of concrete sky of impeller backboard and cover plate pipes' analysis is limited below by the coordinate figure of coordinate system shown in Fig. 5 Between shape.Coordinate unit be D/100, D be impeller diameter.

After each coordinate points of above-mentioned backboard and cover plate pipes' analysis respectively smooth connection, i.e. form a smooth backboard Pipes' analysis molded line 21 and cover plate pipes' analysis molded line 22, rotate these two around impeller central axis (X-axis of Fig. 5), i.e. form leaf The backboard pipes' analysis of wheel and cover plate pipes' analysis, go to cut the blade blade said three-dimensional body that aforementioned manner is formed with the two curved surface, protect Stay intermediate flow channel part, delete redundance, the basic flow channel shape of impeller can be obtained.Afterwards, then by blade inlet edge with one The bullet of individual about 10 ° carries out cutting (making blade inlet edge have the inclination angle of about 10 °), and is repaiied by the blade inlet edge after cutting Change circular shape, then the certain thickness that impeller backboard and cover plate stretched out into, i.e. can get the basic 3D shape of impeller.

Claims (2)

1. a centrifugal blower impeller, including between backboard, cover plate and backboard and cover plate around impeller central radially The blade of distribution, it is characterised in that

Described blade has high-order SPL shape,

Inlet blade angle is 60 degree, and outlet blade angle is-10 degree, and blade exit point drift angle is 24 degree, and

Blade inlet edge is circular arc.

2. impeller as claimed in claim 1, it is characterised in that the quantity of described blade is 19.