CN211874804U

CN211874804U - Impeller structure of high pressure positive blower

Info

Publication number: CN211874804U
Application number: CN201922115388.0U
Authority: CN
Inventors: 毕国伟; 李虹
Original assignee: Guangdong Zhaoqing Deton Co ltd
Current assignee: Guangdong Zhaoqing Deton Co ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-11-06
Anticipated expiration: 2029-11-28

Abstract

The utility model discloses an impeller structure of a high pressure fan, which comprises a blade disc and a plurality of blades, wherein the blade disc comprises a front disc and a rear disc, the plurality of blades are uniformly and fixedly arranged between the front disc and the rear disc, and the blades are respectively welded and fixed with the front disc and the rear disc; the blade includes long blade and short blade, long blade and short blade mutual interval distribution, correspond on the back plate the position of long blade is provided with a plurality of plug weld holes, plug weld hole evenly distributed is in correspond on the back plate on the position at the middle part of long blade. The impeller structure is convenient for welding construction, the impeller is small in welding deformation, good in compactness and large in welding strength, and the impeller is guaranteed to be stable in size, so that the performance of the fan in the using process can be guaranteed.

Description

Impeller structure of high pressure positive blower

Technical Field

The utility model relates to a high pressure positive blower's impeller structural design technical field, concretely relates to high pressure positive blower's impeller structure.

Background

The fan is a driven fluid machine which increases the pressure of gas and discharges the gas by means of input mechanical energy, and the main part of the fan driving the fluid is an impeller in the fan. High pressure positive blower impeller is very little because of its particularity between the preceding dish of design and the back dish, and conventional welding nozzle is difficult to stretch into, and the welding back of dish before accomplishing usually, owing to be difficult to stretch into conventional welding nozzle, therefore the middle part position of blade is difficult to pass through the welding nozzle welding, and how guarantee to weld inner structure's compactness and welding deformation is controllable is a problem. In the prior art, the grooves are formed in the rear disc, and the grooves are formed in the rear disc and the matching parts of the rear disc and the blades.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high pressure positive blower's impeller structure, convenient welding construction, impeller welding deformation is little, and the compactness is good, and welding strength is big, guarantees impeller size stability to the fan performance of use has been guaranteed.

In order to solve the above problem, the utility model discloses realize according to following technical scheme:

the utility model provides a pair of impeller structure of high pressure positive blower, the bladed disk includes front bezel and back plate, a plurality of the blade is evenly fixed to be set up between the front bezel and the back plate, its characterized in that, the blade respectively with the front bezel with the back plate weld fixedly; the blade includes long blade and short blade, long blade and short blade mutual interval distribution, correspond on the back plate the position of long blade is provided with a plurality of plug weld holes, plug weld hole evenly distributed is in correspond on the back plate on the position at the middle part of long blade.

Further, the short blades are distributed between two adjacent long blades, and the distance between one end of each short blade close to the center of the blade disc and the center of the blade disc is larger than the distance between one end of each long blade close to the center of the blade disc and the center of the blade disc.

Further, the long blade includes the back end that is close to back dish center one end, is close to the anterior segment of one side is followed outward to the back dish, and is located the anterior segment with middle section between the back end, the anterior segment with the back end is through crisscross intermittent fillet weld welded fastening on the back dish, plug weld hole evenly distributed is in correspond on the back dish in the position of middle section, the middle section is through plug weld welded fastening on the back dish.

Further, the long blades and the front disk are fixed through staggered intermittent fillet welding.

Further, the short blades are fixed with the front disc and the rear disc through staggered intermittent fillet welding.

Further, the long blade is S-shaped.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses a high pressure positive blower's impeller structure is through with long blade and short blade difference welded fastening in preceding dish and back dish, is provided with a plurality of plug weld holes on the position that the back dish corresponds long blade to make one section at long blade middle part be difficult to welded position can be through plug weld and back dish welded fastening. And the mode of fillet welding is still adopted at other positions that can weld of long blade, through such combination welded structure, can enough guarantee long blade and back dish welded compactness, can also guarantee the welding strength of long blade simultaneously to guarantee the fan performance of use.

In addition, through the mutual interval setting of long blade and short blade, adopt short blade to carry out the reposition of redundant personnel effect to the air current, can avoid the formation of air current vortex in the air current passage between the long blade, improve impeller air current's output efficiency, reduce the loss of air current.

Drawings

Embodiments of the invention are described in further detail below with reference to the attached drawing figures, wherein:

fig. 1 is a schematic structural diagram of an impeller structure of a high pressure fan according to the present invention;

fig. 2 is a front view of an impeller structure of a high pressure fan according to the present invention;

FIG. 3 is a schematic view of the connection structure of the front disk and the blades of the present invention;

FIG. 4 is a schematic view of the connection structure of the back plate and the blades of the present invention;

in the figure:

1-front disc; 2-a rear disc; 3-long leaves; 31-the preceding paragraph; 32-middle section; 33-rear section; 4-short leaf; 5-plug welding the hole; 6-shaft hole; 7-welding seam.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

As shown in fig. 1-2, an impeller structure of a high pressure fan comprises a blade disc and a plurality of blades, wherein the blade disc comprises a front disc 1 and a rear disc 2, the plurality of blades are uniformly and fixedly arranged between the front disc 1 and the rear disc 2, the front disc 1 and the rear disc 2 have the same size, and a shaft hole 6 is formed in the centers of the front disc 1 and the rear disc 2. The blade welded fastening is on preceding dish 1, and the blade includes long blade 3 and short blade 4, and a plurality of plug weld holes 5 have been seted up to the position that corresponds long blade 3 on the back plate 2, and plug weld hole 5 runs through back plate 2, and plug weld hole 5 evenly distributed corresponds on back plate 2 on the middle part position of long blade 3.

Long blade 3 is including being close to the back end 33 of 2 central one ends of rear disc, being close to the anterior segment 31 of 2 outer edges one side of rear disc and being located the middle section 32 between anterior segment 31 and the back end 33, and anterior segment 31 and back end 33 pass through fillet weld to be fixed on rear disc 2, the above the middle part position of long blade 3 be the middle section 32 of long blade 3 promptly, plug weld hole 5 evenly distributed corresponds on rear disc 2 on the middle section 32 promptly. The short blades 4 are distributed between two adjacent long blades 3, and the distance between one end of each short blade 4 close to the center of the blade disc and the center of the blade disc is larger than the distance between one end of each long blade 3 close to the center of the blade disc and the center of the blade disc, namely, the short blades 4 are distributed on one circle of the blade disc close to the outer edge.

When the design to high pressure positive blower impeller, because the interval between preceding dish 1 and the back dish 2 is very little, conventional welding tip is all difficult to stretch into, and the welding tip can only stretch into through the opening part of the axle hole 6 at back dish 2 center and back dish 2 outer edge, and the length of stretching into is limited moreover, just can only realize anterior segment 31 and back end 33 of long blade 3 through the welding tip to and set up the welding of seeing the short blade 4 of leaf dish outer edge to the greatest extent. However, since the welding tip does not fully extend, the middle section 32 of the long blade 3 cannot be welded, which causes problems such as insufficient welding strength and air leakage. Consequently, set up a plurality of plug welding holes 5 in the position that back dish 2 corresponds long blade 3 middle section 32, through the welding mode of plug welding, with long blade 3 welded fastening on back dish 2, solved the problem that long blade 3 middle section can not weld. Furthermore, the utility model discloses an impeller structure only sets up plug welding hole 5 on long blade 3 is more difficult welded middle section 32 position, and adopts the welding tip to carry out the fillet weld welding at long blade 3's anterior segment 31 and back end 33, has avoided on the back plate 2 to correspond the position of long blade 3 and has all offered plug welding hole, can guarantee welding strength effectively, reduces welding deformation, guarantees the stability of impeller size. Meanwhile, a combined welding structure of plug welding and fillet welding can be formed on the long blade 3, so that not only can the compactness of the long blade 3 and the rear disc 2 be guaranteed, but also the welding strength of the long blade 3 can be further guaranteed, and the fan performance in the using process can be further guaranteed.

In this embodiment, all be provided with three plug welding hole 5 on the position that corresponds each long blade 3 on the back plate 2 to guarantee that welded is firm, the length of arranging of three plug welding hole 5 comparison coincidence long blade 3 middle section 32 simultaneously. Because the distance of the remaining middle section 32 can be determined after the front section 31 and the rear section 33 of the long blade 3 are welded, through tests and analysis, three plug welding holes 5 are arranged on the length, wherein the distances among the three plug welding holes 5 are the same, the production difficulty is low, the stability is good, and the optimal effect can be achieved.

The long blade 3 is fixed to the front disk 1 and the rear disk 2 by staggered intermittent fillet welding, so that a staggered intermittent weld 7 is formed on the long blade 3, and the short blade 4 is fixed to the front disk 1 and the rear disk 2 by staggered intermittent fillet welding, so that a staggered intermittent weld 7 is also formed on the short blade 4. That is, the long blade 3 is welded on the front disc 1 in a staggered intermittent fillet welding mode, the front section 31 and the rear section 33 of the long blade 3 are welded on the rear disc 2 in a staggered intermittent fillet welding mode, and the short blade 4 is welded on the front disc 1 and the rear disc 2 respectively in a staggered intermittent fillet welding mode, so that the construction is convenient and the production efficiency is improved on the basis of ensuring the welding strength. Meanwhile, the welding mode of staggered intermittent fillet welding forms staggered intermittent weld structures on the long blade 3 and the short blade 4 respectively, so that the stability of welding between the blades and the front disc 1 and the rear disc 2 is ensured, and the strength and compactness of the blades are ensured.

The long blades 3 are arranged in an S shape, the main function is to enable the airflow to flow along the S-shaped channel formed between the long blades 3, and the airflow can be compressed as far as possible at the outlet position to form high-pressure airflow. In addition, because the S-shaped channel means that the direction of the airflow is changed continuously in the flowing process, vortex loss is easy to generate, particularly, the sectional area of the channel is suddenly increased at the position of the air outlet, the speed of the airflow is suddenly reduced, and the airflow loss caused by vortex is larger under the condition that the direction and the speed are suddenly changed simultaneously. Short blades 4 are thus also arranged between the long blades 3, by the mutual spacing of the long blades 3 and the short blades 4, i.e. one short blade 4 is arranged in each "S" shaped channel. The short blades 4 are arranged in the S-shaped channel and can play a role in shunting airflow, and the change amplitude of the direction of the airflow in the flowing process is reduced, so that the formation of airflow vortex in the S-shaped channel is reduced, the output efficiency of impeller airflow is improved, and the loss of the airflow is reduced.

The utility model relates to a manufacturing process of high pressure positive blower impeller structure:

firstly, respectively pressing the front disc 1 and the blades through a pressing mold, wherein the long blades 3 and the short blades 4 are arranged at intervals, and then welding and fixing the long blades 3 and the short blades 4 on the front disc 1 in a staggered intermittent fillet welding mode. Secondly, a plug welding hole 5 is formed in the position corresponding to the rear disc 2, then the rear disc 2 and the blades are welded and fixed, here, the plug welding fixing of the rear disc 2 and the long blades 3 and the fillet welding fixing of the rear disc 2 and the long blades 3 and the short blades 4 are respectively carried out, and in the welding of the rear disc, the welding sequence does not affect the final result. And after the welding of the rear disc 2 is finished, a vibration aging instrument is adopted to vibrate the welded impeller structure to eliminate welding stress.

While the preferred embodiments of the present invention have been described in detail, it should be understood that modifications and variations can be made by persons skilled in the art without inventive faculty, and in light of the above teachings. Therefore, the technical solutions according to the present invention, which can be obtained by logical analysis, reasoning or limited experiments based on the prior art, should be within the scope of protection defined by the claims.

Claims

1. The impeller structure of the high-pressure fan comprises a blade disc and a plurality of blades, wherein the blade disc comprises a front disc and a rear disc, and the plurality of blades are uniformly and fixedly arranged between the front disc and the rear disc; the blade includes long blade and short blade, long blade and short blade mutual interval distribution, correspond on the back plate the position of long blade is provided with a plurality of plug weld holes, plug weld hole evenly distributed is in correspond on the back plate on the position at the middle part of long blade.

2. The impeller structure of the high pressure fan according to claim 1, wherein the short blades are distributed between two adjacent long blades, and a distance between one end of the short blade close to the center of the blisk and the center of the blisk is larger than a distance between one end of the long blade close to the center of the blisk and the center of the blisk.

3. The impeller structure of the high pressure positive blower according to claim 1, wherein the long blade includes a rear section near one end of the center of the rear disk, a front section near one side of the outer edge of the rear disk, and a middle section located between the front section and the rear section, the front section and the rear section are fixed on the rear disk by staggered intermittent fillet welding, the plug welding holes are uniformly distributed on the rear disk at positions corresponding to the middle section, and the middle section is fixed on the rear disk by plug welding.

4. The impeller structure of the high pressure fan according to claim 1, wherein the long blades and the front disk are fixed by staggered intermittent fillet welding.

5. The impeller structure of the high pressure fan according to claim 1, wherein the short blades are fixed with the front disk and the rear disk by staggered intermittent fillet welding.

6. The impeller structure of the high pressure fan as claimed in claim 1, wherein the long blades are S-shaped.