CN2466399Y

CN2466399Y - Low-noise pipeline axialflow ventilator

Info

Publication number: CN2466399Y
Application number: CN 00239182
Authority: CN
Inventors: 卞学谅; 王栋国; 程文瑞
Original assignee: TIANDICHENG VENTILATING EQUIPMENT CO Ltd BEIJING
Current assignee: TIANDICHENG VENTILATING EQUIPMENT CO Ltd BEIJING
Priority date: 2000-06-22
Filing date: 2000-06-22
Publication date: 2001-12-19
Anticipated expiration: 2010-06-22

Abstract

The utility model discloses a low-noise pipeline axial-flow ventilator which belongs to a ventilator. The body of the low-noise pipeline axial-flow ventilator is connected by a front flow deflector, a cylinder, an impeller, a motor and a back flow rectifier, and the front and the back parts of the body are connected with a front conical tube and a back conical tube. With the functions of front flow deflector, the back flow rectifier and the impeller composed of twisted plate type vanes, the static pressure and the total pressure of the axial-flow ventilator are enhanced, the highest total pressure of the axial-flow ventilator reaches to 80 percents, and the ratio A-weighted sound pressure level reaches 18-25 db (A). The utility model effective improves environmental protection condition, and has the advantages of compact structure, small occupation of land, and convenient installation. The utility model is applied to the pressurizing and air supplying and exhausting of machinery rooms and straight pipelines.

Description

Low noise pipeline propeller fan

The utility model relates to ventilator, particularly a kind of low noise pipeline propeller fan that directly is contained in the ventilation duct.

Existing market fan kind is a lot, have centrifugal blower, tiltedly (mixing) flow fan and axial-flow blower, particularly axial-flow blower to exist type few, the type selecting difficulty, especially blast is higher, the less relatively blower fan model of air quantity is still less.Diagonal flow fan noise height, efficient are low, and unstable properties, and price is very expensive.The plain shaft flow fan of using on the present market, noise is also higher.

The purpose of this utility model provide have distortion template blade, a kind of low noise pipeline propeller fan that pneumatic efficiency is high.

The purpose of this utility model is achieved like this: a kind of low noise pipeline axial-flow blower, it is made up of casing, impeller and motor.Described casing is that preceding Taper Pipe 1 and preceding fluid director 2 join, and covers on the cylinder 4 of impeller 3 and motor 6 outsides, and back rectifier 5 is connected with back Taper Pipe 12 usefulness bolts 7 with preceding water conservancy diversion 2 respectively, also is fixed with bearing 8 between two Taper Pipes, is drilled with fixed hole 9 on bearing 8; Described impeller 3 is welded and is riveted on the circular cone tube hub 3.2 by distortion template blade 3.1, its setting angle is 20 °-40 °, totally 6, and be enclosed within by support ring 3.3 on the central axle sleeve 11 of motor 6, compress by screw 13, motor 6 is fixed on the medial axis of back rectifier 5, also is connected with streamline air guide sleeve 10 on 2 pairs of inner cylinders of preceding fluid director.

The preceding guide card of fluid director is the veneer meander configuration before described, and setting angle is 60 °-80 °, totally 19.

The centroid of section of the rear guide vane of described back fluid director all drops on the upper thread of same footpath, and the chord length in each cross section equates that setting angle is 60 °-80 °, totally 13.

The utility model is compared with prior art: be characterized in having adopted distortion template blade, improved the blower fan pneumatic efficiency; Adopt the measure of configuration rectifier behind fluid director and the impeller of being provided with before the impeller to improve the static pressure and the total head of blower fan, make the highest total pressure efficiency of this blower fan reach 80%, noise is low, is generally 18-25dB; Air intake and air-out direction are on same axis, and be and measure-alike, compact structure, easy for installation, take up an area of few, be applicable to straight pipeline, the pressurization of little space and give, air draft.

Below in conjunction with description of drawings the utility model is further specified.

Fig. 1 is a low noise pipeline propeller fan profile schematic representation.

Fig. 2 is the AA sectional view of Fig. 1.

Fig. 3 is the distortion template blade schematic representation of impeller among Fig. 1.

By Fig. 1, low noise pipeline propeller fan profile schematic representation shown in Figure 2.This low noise pipeline propeller fan has the back rectifier 5 of motor 6 to connect into the propeller fan main body preceding fluid director 2, cylinder 4 and center fixation by bolt 7, and Taper Pipe 1 and back Taper Pipe 12 before connecting before and after the main body.In the rotating shaft of motor 6, be fixed with impeller 3, in impeller 3 fronts are preceding fluid directors 2 of band streamline air guide sleeve 10, because the preceding fluid director 2 that Taper Pipe 1 and streamline air guide sleeve 10 and distortion template vane group became before the front connect, make the air stream that enters change and handed over moving direction, has certain winding speed, reduced the loss of air-flow, add the effect of back rectifier 5 and back Taper Pipe 12 and distortion template blade 3.1 (as shown in Figure 3), the static pressure and the total head of blower fan have been improved, the highest total pressure efficiency of this machine of making reaches about 80%, fan noise reaches 18-25dB (A) far below general service axial-flow blower and oblique (mixing) flow fan than A sound level.This kind blower fan air intake and air-out direction are on same axis, and preceding Taper Pipe 1 is identical with the flange size of back Taper Pipe 12, very convenient, compact structure is installed, occupation of land less, does not influence piping layout and pipeline rout, is applicable to the machine room that the space is narrow and small, the straight pipeline pressurization and give, the air draft place.

Claims

1. low noise pipeline axial-flow blower, it is made up of casing, impeller and motor, it is characterized in that: described casing is that preceding Taper Pipe (1) and preceding fluid director (2) join, the cylinder (4), the back rectifier (5) that cover on impeller (3) and motor (6) outside are connected with bolt (7) with back Taper Pipe (12) with preceding water conservancy diversion (2) respectively, between two Taper Pipes, also be fixed with bearing (8), on bearing (8), be drilled with fixed hole (9); Described impeller (3) welds and is riveted on the circular cone tube hub (3.2) by distortion template blade (3.1), its setting angle is 20 °-40 °, totally 6, and be enclosed within by support ring (3.3) on the central axle sleeve (11) of motor (6), compress by screw (13), motor (6) is fixed on the medial axis of back rectifier (5), also is connected with streamline air guide sleeve (10) at preceding fluid director (2) on to inner cylinder.

2. low noise pipeline axial-flow blower according to claim 1 is characterized in that: the preceding guide card of fluid director is the veneer meander configuration before described, and setting angle is 60 °-80 °, totally 19.

3. low noise pipeline axial-flow blower according to claim 1 is characterized in that: the centroid of section of the rear guide vane of described back fluid director all drops on the upper thread of same footpath, and the chord length in each cross section equates that setting angle is 60 °-80 °, totally 13.