CN202194860U

CN202194860U - Box type centrifugal fan

Info

Publication number: CN202194860U
Application number: CN2011202810753U
Authority: CN
Inventors: 钱建刚
Original assignee: Zhangjiagang Shiyibai Electromechanical Equipment Co Ltd
Current assignee: Zhangjiagang smart Mechanical & Electrical Equipment Co., Ltd.
Priority date: 2011-08-04
Filing date: 2011-08-04
Publication date: 2012-04-18
Anticipated expiration: 2021-08-04

Abstract

The utility model relates to a box type centrifugal fan, which comprises a motor and an impeller connected on an output shaft of the motor. The impeller comprises a rear plate, a flow guiding plate and a plurality of blades arranged between the rear plate and the flow guiding plate. Each blade is in an arc shape and comprises a rear portion close to the rotation center of the impeller and a front portion close to the wheel edge of the impeller. Each blade extends forwards from the rear portion to the front portion, and the radian of each blade increases gradually. The impeller is arranged in a box body which is provided with an air inlet and an air outlet. The air inlet corresponds to a wheel face of the impeller, and the air outlet is close to the wheel edge of the impeller. By means of the arc-shaped blades, pressure and air inlet quantity are increased, impact of airflow on the blades is greatly reduced, airflow fields are led to be even and smooth, noise is reduced, and air quantity is increased.

Description

The box-type centrifugal blower

Technical field

The utility model relates to a kind of centrifugal blower, specifically, relates to a kind of centrifugal fan with casing.

Background technique

The blower fan that present domestic every profession and trade adopts still is an axial-flow blower mainly, and its shortcoming is that noise is big, air quantity is little, static pressure is low, can not adapt to big air quantity, the application of high pressure, and the blower fan overall structure has satisfied not requirement of client.

Summary of the invention

The purpose of the utility model provides the box-type centrifugal blower that a kind of air quantity is big, noise is little, static pressure is high.

For achieving the above object, the technological scheme that the utility model adopts is:

A kind of box-type centrifugal blower; Comprise motor, be connected the impeller on the output shaft of described motor; Described impeller comprises back plate, guide plate, is fixedly installed on the multi-disc blade between described back plate and the described guide plate; Described blade is the arc shaped blade with arc outlet air surface; It comprises that to described anterior the extension, the radian of described arc shaped blade increases described blade gradually by described rear portion near the rear portion of the gyration center of described impeller, near the front portion of described wheel rim;

Described impeller is arranged in the casing, and described casing has intake grill, exhaust outlet, and described intake grill is corresponding with the wheel face of described impeller, and described exhaust outlet is near the wheel rim of described impeller.

Preferably, described guide plate is horn-like, and it comprises first port and second port, and the sectional area of described first port is greater than the sectional area of described second port, and described vanes fixed is connected described first port.

Preferably; Described intake grill place is provided with slip ring, its by described casing outward in the described casing direction comprise outer end, middle-end, the inner successively, the sectional area of setting described outer end is that the sectional area of S1, described middle-end is S2; The sectional area of described the inner is S3, S1＞S3＞S2.

Preferably, described back plate is a surface plate.

Preferably, the wheel rim place near described impeller of a side that is connected with described guide plate of described blade has salient angle.

Preferably, the described casing side of being body, described side's body has first, and described intake grill is arranged on described first, and described exhaust outlet is arranged on perpendicular on any one or several face in four described first faces.

Preferably, described motor is arranged at the outside of described casing, and its output shaft stretches in the described casing, and described casing outer fixing is provided with support, and described motor is arranged on the described support.

Preferably, the radian increment rate at described rear portion is less than the radian increment rate of described front portion.

Preferably, described blade welds fixing with described guide plate, described blade and described back plate mutually.

Because technique scheme utilization; The utility model compared with prior art has advantage: because the utility model adopts arc shaped blade; Increased pressure and air inflow, and reduced the impact of air-flow greatly, made airflow field more evenly smooth and easy blade; Thereby reduced noise, increased air quantity.

Description of drawings

Accompanying drawing 1 is the side view of the box-type centrifugal blower of the utility model.

Accompanying drawing 2 is the axonometric drawing of the box-type centrifugal blower of the utility model.

Accompanying drawing 3 is the axonometric drawing of impeller of the box-type centrifugal blower of the utility model.

Accompanying drawing 4 is the axonometric drawing of blade of the box-type centrifugal blower of the utility model.

In the above accompanying drawing: 1, motor; 2, casing; 3, impeller; 4, intake grill; 5, exhaust outlet; 6, support; 7, slip ring; 8, back plate; 9, guide plate; 10, blade; 11, salient angle; 12, arc outlet air surface.

Embodiment

Below in conjunction with embodiment shown in the drawings the utility model is further described.

Embodiment one: shown in accompanying drawing 1 and accompanying drawing 2.

A kind of casing 2 formula centrifugal blowers comprise motor 1, casing 2, are arranged in the casing 2 and are connected the impeller 3 on the output shaft of motor 1.Casing 2 side's of being bodies, it has first, and first face is provided with intake grill 4, is provided with exhaust outlet 5 perpendicular to any one or several face in four faces of first.Motor 1 is arranged at the outside of casing 2, and its output shaft stretches in the casing 2, and casing 2 outer fixing are provided with support 6, and motor 1 is arranged on the support 6.

Intake grill 4 places are provided with slip ring 7, and it is by comprise outer end, middle-end, the inner to casing 2 interior directions outside the casing 2 successively, and the sectional area of setting the outer end is that the sectional area of S1, middle-end is S2, and inner sectional area is S3, S1＞S3＞S2.

Shown in accompanying drawing 3 to accompanying drawing 4.Impeller 3 comprises back plate 8, guide plate 9, is fixedly installed on the multi-disc blade 10 between back plate 8 and the guide plate 9.Blade 10 is for having the arc shaped blade of arc outlet air surface 12; It comprises near the rear portion of the gyration center of impeller 3, near the front portion of impeller 3 wheel rims; Blade 10 is extended to the front portion by the rear portion, and the radian of arc shaped blade 10 increases gradually, and the radian increment rate at rear portion is less than the radian increment rate of front portion.

Back plate 8 is a surface plate, and blade 10 welds fixing with it mutually.It is horn-like that guide plate is, and it comprises first port and second port, and the sectional area of first port is greater than the sectional area of second port, and blade 10 is weldingly fixed on first port, the linking that matches with slip ring 7 of second port.The wheel rim place near impeller 3 of a side that is connected with guide plate 9 of blade 10 has salient angle 11, and this salient angle 11 has the wind cutting effect.

Intake grill 4 is corresponding with the wheel face of impeller 3, and exhaust outlet 5 is near the wheel rim of impeller 3.When air-flow got into casing 2 by intake grill 4, owing to receive the guide functions of slip ring 7, air-flow can evenly flow to the wheel face of impeller 3.

Compare with traditional centrifugal blower, the pressure coefficient of above-mentioned box-type centrifugal blower and flow coefficient are all bigger, whole centrifugal blower compact structure, and stability has better reached the requirement that air quantity is big, pressure is high, noise is little, meets the customer equipment designing requirement.

The foregoing description only is the technical conceive and the characteristics of explanation the utility model, and its purpose is to let the personage who is familiar with this technology can understand content of the utility model and enforcement according to this, can not limit the protection domain of the utility model with this.All equivalences of being done according to the utility model spirit change or modify, and all should be encompassed within the protection domain of the utility model.

Claims

1. box-type centrifugal blower; Comprise motor, be connected the impeller on the output shaft of described motor; Described impeller comprises back plate, guide plate, is fixedly installed on the multi-disc blade between described back plate and the described guide plate; It is characterized in that: described blade is the arc shaped blade with arc outlet air surface; It comprises that to described anterior the extension, the radian of described arc shaped blade increases described blade gradually by described rear portion near the rear portion of the gyration center of described impeller, near the front portion of described wheel rim;

2. box-type centrifugal blower according to claim 1; It is characterized in that: described guide plate is horn-like; It comprises first port and second port; The sectional area of described first port is greater than the sectional area of described second port, and described vanes fixed is connected described first port.

3. box-type centrifugal blower according to claim 1; It is characterized in that: described intake grill place is provided with slip ring; Its by described casing outward in the described casing direction comprise outer end, middle-end, the inner successively; The sectional area of setting described outer end is that the sectional area of S1, described middle-end is S2, and the sectional area of described the inner is S3, S1＞S3＞S2.

4. box-type centrifugal blower according to claim 1 is characterized in that: described back plate is a surface plate.

5. box-type centrifugal blower according to claim 1 is characterized in that: the wheel rim place near described impeller of a side that is connected with described guide plate of described blade has salient angle.

6. box-type centrifugal blower according to claim 1; It is characterized in that: the described casing side of being body; Described side's body has first; Described intake grill is arranged on described first, and described exhaust outlet is arranged on perpendicular on any one or several face in four described first faces.

7. box-type centrifugal blower according to claim 1; It is characterized in that: described motor is arranged at the outside of described casing; Its output shaft stretches in the described casing, and described casing outer fixing is provided with support, and described motor is arranged on the described support.

8. box-type centrifugal blower according to claim 1 is characterized in that: the radian increment rate at described rear portion is less than the radian increment rate of described front portion.

9. box-type centrifugal blower according to claim 1 is characterized in that: described blade welds fixing with described guide plate, described blade and described back plate mutually.