CN104595218B

CN104595218B - Draught fan

Info

Publication number: CN104595218B
Application number: CN201410715120.XA
Authority: CN
Inventors: 周华; 周凌冰
Original assignee: CHONGQING DEGU TECHNOLOGY Co Ltd
Current assignee: CHONGQING DEGU TECHNOLOGY Co Ltd
Priority date: 2014-12-01
Filing date: 2014-12-01
Publication date: 2017-04-19
Anticipated expiration: 2034-12-01
Also published as: CN104595218A

Abstract

The invention provides a draught fan which comprises a fan shell, a fan cover, a motor and an impeller assembly. The motor and the impeller assembly are installed on the fan shell. The impeller assembly comprises an annular support, a blade and a rear wheel disc which are arranged in sequence, the rear edge of the blade is connected with the rear wheel disc, the front edge of the blade is connected with the annular support, an impeller end cover is further installed on the front edge of the annular support or the blade, the impeller end cover covers the blade, and a vent hole corresponding to an air inlet in the fan cover is formed in the impeller end cover. The motor is installed on the outer wall of the fan shell, and a motor spindle stretches into the fan shell and is connected with the rear wheel disc. By means of the draught fan, the strength of the impeller assembly is improved, the stability in the running process is ensured, and vortex can be prevented from being formed through the sealing coordination of the impeller end cover, a first boss, a second boss, a third boss and the rear wheel disc, gas can pass through the draught fan at a time and does not remain, and the operating airflow is stable. Due to the good sealing effect, the gas does not leak, and the draught fan is suitable for flammable and explosive gas.

Description

A kind of blower fan

Technical field

The present invention relates to gas conveying technology field, more particularly to a kind of good seal performance, constitutionally stable blower fan.

Background technology

Centrifugal blower be widely used in the ventilation of factory, mine, tunnel, cooling tower, vehicle, ship and building, dust discharge and Cooling, centrifugal fan are mainly made up of casing, impeller, motor etc., traditional blower fan, and its impeller is generally centrifugal installed in leaf On wheel hub disk, upper impeller is hanging, is easily deformed in the case where rotating speed is higher, structural instability, and existing blower fan by Vortex is formed easily in the problem of its structure design, gas is stopped in housing inside turn, and work efficiency is not high, and sealing property compares Difference, is not suitable for the conveying of flammable explosive gas.

The content of the invention

The deficiencies in the prior art in view of the above, it is an object of the invention to provide a kind of stabilized structure, air-flow is steady Blower fan.

For achieving the above object and other related purposes, the present invention provides a kind of blower fan, including casing, cover and installation Motor and impeller assembly in casing, the impeller assembly include ring support, blade and the rear trochal disc for setting gradually, described Blade rear edge is connected with rear trochal disc, and blades leading edges are connected with ring support, is also pacified on the ring support or blades leading edges Equipped with impeller end cap, blade is stated in the impeller end housing residence, and ventilation corresponding with the enterprising air port of cover is offered on impeller end lid Hole, the motor are arranged on casing outer wall, and electric machine main shaft is stretched into and is connected with rear trochal disc in casing.

Due to traditional impeller, its blade is only fixed with rear trochal disc, and another side does not support, in high speed rotation During it is very unstable, be easily deformed or damage so that fan airflow is unstable, air-supply effect it is poor, using said structure Rear blade both sides are connected on ring support with rear trochal disc, enhance the overall structure of blade and impeller assembly so as to It is more stable when high speed rotates；Gas is entered after housing cavity from air inlet, and direct Jing air vents enter impeller assembly and then pass The air outlet in casing is delivered to, remaining place is not spiraled in casing, prevent the formation being vortexed, gas is disposably by blower fan, nothing Stop gas so that air-flow is steady, blower fan work efficiency high.

The bottom of shell is provided with the first boss of annular, and the first boss is fitted with the rear surface of the rear trochal disc.

The surface gluing, sealing after first boss with rear trochal disc, prevents position leakage of the gas from the range of boss, increases Strong sealing effectiveness.

Each described blade is connected with ring support, and the blades leading edges are additionally provided with locating dowel, the impeller end Cover and offer installing hole corresponding with the locating dowel.The structure is easy to fixation is installed between impeller end cap and blade.

The a plurality of groove being adapted with the blades leading edges is further opened with the impeller end lid, the installing hole is opened up The bottom portion of groove, the blades leading edges and locating dowel are coordinated with groove and installing hole respectively.Blade is stretched in groove and impeller End cap is connected more firm.

The air inlet is the bellmouth that diameter gradually increases from outside to inside, the air vent with diameter greater than in air inlet The diameter at end.

The structure can make from air inlet the gas for entering gradually diffuse to impeller assembly, and air-flow is more steady.

The inner end edge of the air inlet forms one and encloses second boss, and the second boss is stretched in the air vent, and with Air vent inwall is fitted.The structure is directly entered impeller assembly after can passing the gas through air inlet, plays the effect of water conservancy diversion, and Sealing good airproof performance.

The 3rd boss of a circle is provided with the cover, the 3rd boss is with diameter greater than the second boss diameter, described Impeller assembly is anterior to be located between second boss and the 3rd boss.

The ring support is integrally formed with blade and rear trochal disc, is integrally formed intensity higher.

Installation set is set on the bottom of shell outer wall, and the motor is located in the installation set.

As described above, the invention has the beneficial effects as follows：The blower fan, impeller assembly intensity are improved, it is ensured that operated Stability in journey, and coordinated by the sealing of impeller end cap, first boss, second boss, the 3rd boss and rear trochal disc, making can Prevent from forming vortex, make gas disposably by blower fan, without gas is stopped, operating air-flow is steady；Due to good sealing effect not outward Let out, thus be applied to flammable explosive gas.

Description of the drawings

Explosive views of the Fig. 1 for the embodiment of the present invention；

Structural representations of the Fig. 2 for embodiment of the present invention impeller assembly；

Structural representations of the Fig. 3 for embodiment of the present invention impeller end cap；

Structural representations of the Fig. 4 for embodiment of the present invention cover；

Sectional views of the Fig. 5 for Fig. 4；

Structural representations of the Fig. 6 for embodiment of the present invention casing；

Sectional views of the Fig. 7 for Fig. 6.

Piece mark explanation

1 cover

11 air inlets

12 second boss

13 the 3rd boss

21 rear trochal discs

22 ring supports

23 blades

24 locating dowels

25 adapter sleeves

3 impeller end caps

31 air vents

32 installing holes

33 grooves

4 casing

41 first boss

42 installation sets

5 motors

Specific embodiment

Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation Content disclosed by book understands other advantages and effect of the present invention easily.

As shown in Figures 1 to 7, the present invention provides a kind of blower fan, including casing 4, is provided with impeller assembly and leaf in casing 4 Wheel end cap 3, cover 1 are sealingly mounted in casing 4, arrange installation set 42, be provided with electricity in installation set 42 in 4 bottom outer wall of casing Machine 5, the main shaft of motor 5 are stretched into 4 inner chamber of casing and are connected with impeller assembly.

As illustrated in fig. 1 and 2, impeller assembly includes ring support 22, blade 23 and the rear trochal disc 21 for setting gradually, blade 23 Back edge is fixedly connected with rear trochal disc 21, and 23 leading edge of blade is connected with ring support 22, is also equipped with 23 leading edge of blade Impeller end cap 3, the impeller end cap 3 cover blade 23, and 3 outer rim of impeller end cap is coordinated with 22 inner ring of ring support, on impeller end cap 3 Offer and 1 enterprising air port of cover, 11 corresponding air vent 31,5 main shaft of motor stretches into the connection in casing 4 and on rear trochal disc 21 Set 25 connects.

As shown in Figure 6 and Figure 7,4 bottom of casing is provided with the first boss 41 of annular, the first boss 41 and rear trochal disc 21 The laminating of rear surface, by surface gluing, sealing after first boss 41 and rear trochal disc 21, prevent gas from 41 scope of first boss Interior position leakage, strengthens sealing effectiveness.

As shown in Figures 2 and 3, each blade 23 is connected with ring support 22, and 23 leading edge of blade is additionally provided with positioning Post 24, offers on impeller end cap 3 and 24 corresponding installing hole 32 of locating dowel, and the structure is easily installed fixation, ring support 22 It is integrally formed with blade 23 and rear trochal disc 21, is integrally formed intensity higher；Before a plurality of and blade 23 is further opened with impeller end cap 3 The groove 33 that edge is adapted, installing hole 32 open up 33 bottom of groove, 23 leading edge of blade and locating dowel 24 respectively with groove 33 and installing hole 32 coordinate.Blade 23 stretch into be connected with impeller end cap 3 in groove 33 it is more firm.

Air inlet 11 is the bellmouth that diameter gradually increases from outside to inside as shown in Figure 4 and Figure 5, and the diameter of air vent 31 is big In the diameter of 11 the inner of air inlet, the inner end edge of air inlet 11 forms one and encloses second boss 12, and the second boss 12 stretches into logical In air holes 31, and fit with 31 inwall of air vent, the structure is directly entered impeller assembly after can passing the gas through air inlet 11, The effect of water conservancy diversion is played, and seals good airproof performance, on cover 1, be provided with the 3rd boss 13 of a circle, 13 diameter of the 3rd boss is big In 12 diameter of second boss, impeller assembly is anterior to be located between second boss 12 and the 3rd boss 13.

Due to traditional impeller, its blade 23 is only fixed with rear trochal disc 21, and another side does not support, and is revolved in high speed It is very unstable during turning, it is easily deformed or damages so that fan airflow is unstable, air-supply effect is poor, using above-mentioned 23 both sides of structure rear blade be connected on ring support 22 and rear trochal disc 21 on, enhance the whole of blade 23 and impeller assembly Body structure so as to more stable when high speed rotates；Gas is entered after housing cavity from air inlet 11, and direct Jing air vents 31 are entered Impeller assembly then passes to the air outlet in casing 4, and in casing 4, remaining place is not spiraled, and prevents the formation being vortexed, gas one Secondary property passes through blower fan, without stop gas so that air-flow is steady, blower fan work efficiency high, as good sealing effect does not leak, thus Suitable for flammable explosive gas.

The principle and its effect of above-described embodiment only illustrative invention, it is not for the present invention is limited, any to be familiar with The personage of this technology all can carry out modifications and changes to above-described embodiment under the spirit and the scope without prejudice to the present invention.Therefore, Such as those of ordinary skill in the art is completed under without departing from disclosed spirit and technological thought All equivalent modifications or change, should by the present invention claim be covered.

Claims

1. a kind of blower fan, including casing, cover and motor and impeller assembly in casing, it is characterised in that：It is described Impeller assembly includes ring support, blade and the rear trochal disc for setting gradually, and the blade rear edge is connected with rear trochal disc, before blade Edge is connected with ring support, and impeller end cap is also equipped with the ring support or blades leading edges, the impeller end housing residence Blade is stated, air vent corresponding with the enterprising air port of cover on impeller end lid, is offered, the motor is arranged on casing outer wall, electricity Owner's shaft extension enters；The bottom of shell is provided with the first boss of annular, the first boss and institute State the rear surface laminating of rear trochal disc；Each described blade is connected with ring support, and the blades leading edges are additionally provided with positioning Post, offers installing hole corresponding with the locating dowel on the impeller end lid；The inner end edge of the air inlet forms one and encloses Second boss, the second boss are stretched in the air vent, and are fitted with air vent inwall.

2. a kind of blower fan according to claim 1, it is characterised in that：Be further opened with the impeller end lid it is a plurality of with it is described The groove that blades leading edges are adapted, the installing hole open up the bottom portion of groove, the blades leading edges and locating dowel respectively with Groove and installing hole coordinate.

3. a kind of blower fan according to claim 1, it is characterised in that：The air inlet gradually increases for diameter from outside to inside Bellmouth, the diameter inner with diameter greater than air inlet of the air vent.

4. a kind of blower fan according to claim 1, it is characterised in that：The 3rd boss of a circle is provided with the cover, should With diameter greater than the second boss diameter, the impeller assembly is anterior to be located between second boss and the 3rd boss 3rd boss.

5. a kind of blower fan according to claim 1, it is characterised in that：The ring support and blade and rear trochal disc one into Type.

6. a kind of blower fan according to claim 1, it is characterised in that：Installation set is set on the bottom of shell outer wall, institute State motor to be located in the installation set.