CN218624738U - Front-bent closed impeller - Google Patents

Abstract

The utility model discloses a closed impeller of antecurvature, including back rim plate (1), the center department of back rim plate (1) is equipped with wheel hub (2), use wheel hub (2) to be provided with multi-disc antecurvature formula blade (3) as symmetrical center circumference array on back rim plate (1), still be equipped with on multi-disc antecurvature formula blade (3) with back rim plate (1) just preceding rim plate (4), be equipped with air intake (401) on preceding rim plate (4) with wheel hub (2) just right position, wherein, adjacent two antecurvature formula blades (3), preceding rim plate (4) and back rim plate (1) enclose to form blade clearance and outwards progressively bigger water conservancy diversion wind channel (100) in, the one end that antecurvature formula blade (3) are close to wheel hub (2) still is equipped with carve mouth (301) to one side, carve mouth (301) to one side and be used for carrying out the cut wind to the wind that injects into along air intake (401), and add the wind channel (100) of injection. Through this application, the problem that the air output of centrifugal fan's impeller is little, the noise is big among the correlation technique is solved.

Description

Front-bent closed impeller

Technical Field

The utility model relates to a fan technical field especially relates to closed impeller of antecurvature.

Background

In a centrifugal fan in the related technology, a motor drives an impeller to rotate, blades in the impeller force gas to rotate, the gas does work to increase energy, the gas is thrown out to the periphery of the impeller under the action of the centrifugal force, the speed energy is converted into pressure energy through a volute casing, after the gas in the impeller is discharged, the pressure in the impeller is lower than the pressure in an air inlet, new gas is sucked into the impeller under the action of pressure difference, and the gas is continuously output from an outlet.

In the related technology, the centrifugal fan using the front-bending impeller has the blades arranged on the wheel disc circumferentially, and the distances between the centers of the two adjacent corresponding wheel discs and the two sides of the outer edge are equidistant, namely the impeller forms an equidistant air guide channel and an equidistant air guide channel, so that the air outlet efficiency of the centrifugal fan is low; meanwhile, the position of the air guide inlet, close to the center of the impeller, of the air guide channel is limited by the blocking of the blades, so that the air quantity entering the air guide channel is reduced, the air quantity of the impeller is small, and the noise of the impeller is increased due to the fact that the blades are blocked and the wind impacts the blades.

Aiming at the problems of small air output and large noise of an impeller of a centrifugal fan in the related art, a better technical scheme is lacked.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need to provide a forward-bent enclosed impeller to solve at least the problems of small air output and high noise of the impeller of the centrifugal fan in the related art.

In order to solve the above technical problem, the utility model provides a technical scheme as follows: the front-bent closed impeller comprises a rear wheel disc, wherein a wheel hub is arranged at the center of the rear wheel disc, a plurality of front-bent blades are arranged on the rear wheel disc in a circumferential array by taking the wheel hub as a symmetric center, a front wheel disc opposite to the rear wheel disc is further arranged on the plurality of front-bent blades, an air inlet is formed in the position, opposite to the wheel hub, of the front wheel disc, the adjacent two front-bent blades, the front wheel disc and the rear wheel disc are enclosed to form a flow guide air channel with a blade gap gradually increasing from inside to outside, an inclined wedge opening is further formed in one end, close to the wheel hub, of each front-bent blade, and is used for cutting air of air injected along the air inlet and adding air quantity injected into the flow guide air channel.

In the forward-bent closed impeller, forward-bent blades are adopted, a guide air duct with gradually increased blade gaps from inside to outside is formed by enclosing adjacent blades together with a wheel disc, the blade gap of an air outlet of each guide air duct is large, the pressure of the air outlet is reduced, and the blade gap of the air outlet is set to be larger than the blade gap of the air inlet side of the guide air duct, so that the air outlet quantity of the impeller is large, and the air quantity throughput of the impeller is improved; and then, the inclined wedge port is arranged at the position, close to the air inlet side of the guide air duct, of the blade, so that the blockage of the blade on the air inlet of the guide air duct is reduced, the noise of the impeller is reduced, the air quantity entering the air guide channel is increased, the air outlet quantity of the impeller is increased, and the problems of small air outlet quantity and large noise of the impeller of the centrifugal fan in the related technology are solved.

In one embodiment, the forward curved blades are riveted to the rear disk and the front disk, respectively, for the assembly of the impeller.

According to the arrangement, the front-bent blades, the front wheel disc and the rear wheel disc are separately prepared and then connected in a riveting manner, so that the problems that when the impeller is integrally prepared, the preparation difficulty is high, and the cutting and forming of a guide air duct of the impeller are inconvenient are solved; meanwhile, material waste caused by preparation is reduced, and the yield of product preparation is improved.

In one embodiment, in order to improve throughput capacity and air volume throughput of the impeller, the number of the forward-curved blades circumferentially arrayed on the rear wheel disc is as follows: 6-10 tablets.

In one embodiment, in order to improve the air output and meet the air output requirement of the centrifugal fan, the distance between the front wheel disc and the rear wheel disc is 35-40mm.

In one embodiment, in order to reduce the energy consumption of the centrifugal fan during operation, the thickness of the front wheel disc and the rear wheel disc is 3-5mm.

So set up, through setting up preceding rim plate with the thickness of back rim plate makes the impeller satisfy when having the big amount of wind, also lightens the weight of impeller, reduces the required energy consumption of centrifugal fan during operation.

In one embodiment, in order to increase the flow guide area of the flow guide air duct, the starting point of the forward-curved blade close to the inclined wedge side coincides with the outer edge of the projection profile of the air inlet on the rear wheel disc.

Drawings

Fig. 1 is a first perspective view of a forward-curved closed impeller according to an embodiment of the present application;

fig. 2 is a second perspective view of the forward-curved enclosed impeller according to the embodiment of the present application;

FIG. 3 is an exploded view of a forward curved shrouded impeller according to an embodiment of the present application;

FIG. 4 is a schematic view of an assembly of a blade and a rear disk according to an embodiment of the present application. .

Reference numerals

1. A rear wheel disc; 100. a diversion air duct;

2. a hub;

3. a forward-curved blade; 301. an inclined wedge opening;

4. a rear wheel disc; 401. and an air inlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 4, the closed impeller with a forward bend according to the embodiment of the present application includes a rear wheel disc 1, a hub 2 is disposed at a center of the rear wheel disc 1, a plurality of blades 3 with a forward bend are circumferentially arrayed on the rear wheel disc 1 with the hub 2 as a symmetric center, a front wheel disc 4 facing the rear wheel disc 1 is further disposed on the plurality of blades 3 with a forward bend, an air inlet 401 is disposed on the front wheel disc 4 facing the hub 2, wherein two adjacent blades 3 with a forward bend, the front wheel disc 4 and the rear wheel disc 1 are enclosed to form a guide air duct 100 with a blade gap gradually increasing from inside to outside, an inclined wedge 301 is further disposed at one end of the blade 3 close to the hub 2, and the inclined wedge 301 is used for cutting air from air injected along the air inlet 401 and adding air volume injected into the guide air duct 100.

In the forward-bent closed impeller, the forward-bent blades 3 are adopted, the guide air ducts 100 with gradually increasing blade gaps from inside to outside are formed by enclosing adjacent blades together with the wheel disc, the blade gap of the air outlet (refer to L1 in fig. 4) of each guide air duct 100 is large, the pressure of the air outlet is reduced, and the blade gap (refer to d2 in fig. 4) of the air outlet is set to be larger than the blade gap (refer to d1 in fig. 4) of the air inlet side of the guide air duct 100, so that the impeller has high speed of air-throwing speed, large air output and improved air volume throughput of the impeller; and then, the inclined wedge port 401 is arranged at the position of the blade close to the air inlet side of the guide air duct 100, so that the blocking of the blade to the air inlet of the guide air duct 100 is reduced, the noise of an impeller is reduced, the air quantity entering the guide air duct is improved, the air outlet quantity of the impeller is large, and the problems of small air outlet quantity and large noise of the impeller of a centrifugal fan in the related art are solved.

In this embodiment, referring to fig. 4, the forward-curved blade means that, in a radial cross section of the impeller, an included angle between an outer edge line (refer to f2 in fig. 4) of the forward-curved blade 3 and a normal direction of a tangent (refer to f1 in fig. 4) to a rotational direction of the point (refer to point a in fig. 4) of the blade is an acute angle (refer to θ in fig. 4), wherein an installation direction of the forward-curved blade coincides with a rotational direction of the impeller.

It should be further noted that, in this embodiment, by increasing the radian of the forward-bent blades 3, the corresponding lengths of the forward-bent blades 3 are increased, the equivalent diameter on the impeller is increased, the air flow guided by the guide air duct 100 formed by two adjacent forward-bent blades 3 is increased, and the air throwing speed and the air flow of the impeller are enhanced.

In order to realize the assembly of the impeller, in one embodiment, the forward-bent blades 3 are riveted with the rear wheel disc 1 and the front wheel disc 4 respectively.

Through the arrangement, the front-bent blades 3, the front wheel disc 4 and the rear wheel disc 1 are independently prepared and then connected in a riveting mode, so that the problems that when the impeller is integrally prepared, the preparation difficulty is high, and the cutting and forming of a guide air duct of the impeller are inconvenient are solved; meanwhile, material waste caused by preparation is reduced, and the yield of product preparation is improved.

In order to improve the throughput capacity and the air volume throughput of the impeller, in one embodiment, the forward-bent blades 3 arranged on the rear wheel disc 1 in a circumferential array are 6-10, and in some alternative embodiments, the forward-bent blades 3 are 10.

In order to improve the air output and meet the air output requirement of the centrifugal fan, in one embodiment, the distance between the front wheel disc 4 and the rear wheel disc 1 is 35-40mm; in some of these alternative embodiments, the spacing between the front 4 and rear 1 wheels is set to 35mm.

In order to reduce the energy consumption of the centrifugal fan during operation, in one embodiment, the thicknesses of the front wheel disc 4 and the rear wheel disc 1 are 3-5mm, and in some optional embodiments, the thicknesses of the front wheel disc 4 and the rear wheel disc 1 are both 3mm.

By the arrangement, the impeller is made to meet the requirement of having large air volume by setting the thicknesses of the front wheel disc 4 and the rear wheel disc 1, the weight of the impeller is reduced, and energy consumption required by the centrifugal fan during operation is reduced.

In one embodiment, in order to increase the flow guide area of the guide air duct 100, the starting point of the forward-curved blade 3 near the inclined wedge 301 coincides with the outer edge of the projection profile of the air inlet 401 on the rear wheel disc 1.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.

Claims (6)

1. The utility model provides a closed impeller of antecurvature, its characterized in that, includes back rim plate (1), the center department of back rim plate (1) is equipped with wheel hub (2), back rim plate (1) go up with wheel hub (2) are provided with multi-disc antecurvature formula blade (3) for symmetrical center circumference array, the multi-disc still be equipped with on antecurvature formula blade (3) with back rim plate (1) just preceding rim plate (4) to, preceding rim plate (4) go up with be equipped with air intake (401) on the just right position of wheel hub (2), wherein, adjacent two antecurvature formula blade (3) preceding rim plate (4) with back rim plate (1) are enclosed and are closed and form blade clearance from inside to outside gradual increase water conservancy diversion wind channel (100), antecurvature formula blade (3) are close to the one end of wheel hub (2) still is equipped with oblique wedge mouth (301), wedge mouth (301) are used for following the wind is cut to the wind that air intake (401) injected into, and add the amount of wind that injects into water conservancy diversion wind channel (100).

2. The forward-curved closed impeller according to claim 1, characterized in that the forward-curved blades (3) are riveted to the rear disk (1) and the front disk (4), respectively.

3. The forward-curved closed impeller as claimed in claim 1, characterized in that the number of forward-curved blades (3) arranged in a circumferential array on the rear disk (1) is: 6-10 tablets.

4. The forward-curved closed impeller as claimed in claim 3, characterized in that the spacing between the front disk (4) and the rear disk (1) is 35-40mm.

5. The forward-curved closed impeller according to claim 4, characterized in that the thickness of the front wheel disc (4) and the rear wheel disc (1) is 3-5mm.

6. The forward-curved closed impeller according to claim 1, characterized in that the starting point of the forward-curved blade (3) near the side of the inclined wedge (301) coincides with the projected outline outer edge of the air inlet (401) on the rear wheel disc (1).

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