GB2587572A

GB2587572A - A new structure of centrifugal fan impeller

Info

Publication number: GB2587572A
Application number: GB2019644.0A
Authority: GB
Inventors: Gao Yi
Original assignee: Hangzhou Sanwo Intelligent Tech Co Ltd
Current assignee: Hangzhou Sanwo Intelligent Tech Co Ltd
Priority date: 2019-12-27
Filing date: 2020-12-14
Publication date: 2021-03-31
Anticipated expiration: 2040-12-14
Also published as: CN110985437B; JP2021107707A; GB2587572B; JP6810839B1; GB202019644D0; CN110985437A

Abstract

A centrifugal fan impeller comprises a wheel disc (1), a shroud (2) and a plurality of the blades (3), a manifold ring (4), wherein the blades (3) are located between the manifold ring (4) and the air inlet (2a), air accumulating grooves (4a), wherein the air accumulating grooves 4a on ring-shaped, connecting holes (4b) penetrated through along a radial direction of the shroud (2) are arranged on the groove bottom walls, and cones (6) are fixedly arranged on an outer side of the manifold ring (4), and one end of each of the cones (6) is communicated with a corresponding one of the connecting holes (4b); the invention can ensure a small flow with a big pressure.

Description

A NEW STRUCTURE OF CENTRIFUGAL FAN IMPELLER

TECHNICAL FIELD

[0001] The present invention relates to the technical field of fan, referring to a centrifugal fan, in particular to a new structure of centrifugal fan impeller.

BACKGROUND OF THE INVENTION

[0002] The centrifugal fan is a machinery that transport and discharge air to improve air pressure with input mechanical energy, which is a driven fluid machinery. The centrifugal fan is widely applied in ventilation, dust-discharging and cooling in factories, mines, tunnels, cooling towers, vehicles, vessels and buildings; ventilation and air-reducing in boilers and industrial furnace; air regulation devices, cooling and ventilation of home supplies; drying and selected sending of cereal; inflation and propulsion of wind tunnel and hovercraft, and so on.

[0003] For existing centrifugal fans, the inlet flow is generally proportional to outlet pressure, that is, the inlet flow is small and the outlet pressure is also not high, which caused that the existing centrifugal fans can not meet a using in some working situations with small flow and large pressure.

[0004] BRIEF SUNEVIARY OF THE INVENTION [0005] The technical problem to be solved by the invention is to provide a new structure of centrifugal fan impeller with high outlet pressure so as to overcome the above-mentioned problems existing in the prior art.

[0006] The purpose of the present invention is achieved by the following technical schemes: the new structure of centrifugal fan impeller comprises a wheel disc, a shroud with an air inlet and blades arranged between the wheel disc and the shroud, and a plurality of the blades are distributed at regular intervals along a circumferential direction of the shroud, wherein airways are formed between adjacent two of the blades, and a manifold ring is arranged between the shroud and the wheel disc, wherein the manifold ring is arranged in an axial alignment with the shroud, wherein the blades are located between the manifold ring and the air inlet, and two ends of the manifold ring are sealed and fixedly connected with the shroud and the wheel disc respectively, wherein air accumulating grooves are arranged on an inner side wall of the manifold ring, wherein the air accumulating grooves on ring-shaped are arranged in an axial alignment with the manifold ring, and upward sections of the air accumulating grooves on the manifold ring is on L-shaped, and the air accumulating grooves are composed of groove side walls and groove bottom walls of vertically arranged, and the groove side walls directly face the shroud, and one end, far away from the air inlet, of each of the blades is abutted against the inner side wall of the manifold ring, and connecting holes penetrated through along a radial direction of the shroud are arranged on the groove bottom walls, wherein a plurality of the connecting holes are distributed at regular intervals along a circumferential direction of the shroud, and cones are fixedly arranged on an outer side of the manifold ring, wherein axes of the cones are extending along the radial direction of the shroud, and diameters of the cones are becoming smaller gradually along a direction from the air inlet to the manifold ring; whereby the number of the cones is the same as the number of the connecting holes, and one end of each of the cones is communicated with a corresponding one of the connecting holes [0007] An using process is listed as follows: air is pumped into the airways from the air inlet and then discharged from the cones with a transportation of the air accumulating grooves and the connecting holes.

[0008] A gap is existing between the blades and the groove bottom walls by an abutment of the blades and the inner side walls of the air accumulating grooves, and the air discharged from the airways can be mixed, energy transferred and redistributed to eliminate a vortex brought by the air and promote air to enter smoothly, and a secondary pressure is performed under taper functions of the cones to discharge the air in a larger pressure to meet some working conditions with small flow and large pressure.

[0009] In above-stated new centrifugal fan impeller, wherein annular grooves are defined on the two end surfaces of the manifold ring, wherein the annular grooves are arranged in an axial alignment with the manifold ring, wherein each of annular gaskets is defined in each of the annular grooves, wherein one end surface of each of the annular gaskets is abutted against the shroud and the wheel disc, and another end surface of each of the annular gaskets is abutted against two of bottom walls of the annular grooves; whereby under actions of the annular gaskets, a sealing effect between the manifold ring, the wheel disc and the shroud can be effectively enhanced to improve a working stability.

[0010] In above-stated new centrifugal fan impeller, wherein connection parts on tube-shaped are integrally molded on end surfaces of the cones closing to the manifold ring, wherein the connection parts are arranged in an axial alignment with the cones, and the connection parts are inserted into the connecting holes, and the connection parts are sealed and fixedly connected with the manifold ring; the above-stated design is convenient for installations of the cones.

[0011] In above-stated new centrifugal fan impeller, wherein the connection parts are sealed and fixedly connected with the manifold ring through thread structures.

[OM 2] In above-stated new centrifugal fan impeller, wherein the two ends of the manifold ring are sealed and fixedly connected with the shroud and the wheel disc respectively through welding.

[0013] In above-stated new centrifugal fan impeller, wherein the connecting holes are composed of tapered holes and screw holes distributed on same line, wherein the screw holes are located between the tapered holes and the cones, wherein the connection parts are threaded in the screw holes, and diameters of the tapered holes are becoming smaller gradually along the direction from the air inlet to the manifold ring; whereby the tapered holes on the connecting holes can further pressing the tapered holes to increase an air pressure.

[0014] Compared with the existing technology, the benefits of the invention are as follows: I. the gap is existing between the blades and the groove bottom walls by an abutment of the blades and the inner side walls of the air accumulating grooves, and the air discharged from the airways can be mixed, energy transferred and redistributed to eliminate the vortex brought by the air and promote air to enter smoothly, and the secondary pressure is performed under the taper functions of the cones to discharge the air in the larger pressure to meet some working conditions with small flow and large pressure; 2. pressure can be further added on the tapered holes on connecting holes to improve the air flow pressure.

BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG.1 is a cross-sectional view showing a schematic structural diagram depicting a new structure of centrifugal fan impeller, [0016] FIG.2 is the enlarged schematic structural diagram of "A' in FIG. 1; [0017] FIG.3 is a position structural diagram of cones, manifold ring and blades; [0018] In the figures, a wheel disc 1, a shroud 2, an air inlet 2a, blades 3, airways 3a, a manifold ring 4, air accumulating grooves 4a, connecting holes 4b, tapered holes 4b I, screw holes 4b2, annular gaskets 5, cones 6, connection parts 6a.

DETAILED DESCRIPTION OF THE INVENTION

[0019] The above is only the further description of the technical proposal of this invention in combination with the specific embodiments and drawings, but the protection scope of the present invention is not limited thereto.

[0020] Referring to FIG. I, a new structure of centrifugal fan impeller comprises a wheel disc I, a shroud 2 with an air inlet 2a and blades 3 arranged between the wheel disc I and the shroud 2, wherein the wheel disc 1 is disposed in an axial alignment with the shroud 2, and a plurality of the blades 3 are distributed at regular intervals along a circumferential direction of the shroud 2, and two sides of the blades 3 are fixedly connected with the wheel disc 1 and the shroud 2 respectively, wherein airways 3a are formed between adjacent two of the blades 3, the number of the blades 3 is determined by a use condition; and in this embodiment, the number of the blades 3 is 16 [0021] Specifically, referring to FIG. 1 and 3, a manifold ring 4 is arranged between the shroud 2 and the wheel disc 1, wherein the manifold ring 4 is arranged in an axial alignment with the shroud 2, wherein the blades 3 are located between the manifold ring 4 and the air inlet 2a, and two ends of the manifold ring 4 are sealed and fixedly connected with the shroud 2 and the wheel disc 1 respectively, whereby a connection method of the manifold ring 4, the shroud 2 and the wheel disc 1 is listed as follows: two end surfaces of the manifold ring 4 contact the shroud 2 and the wheel disc 1 respectively, and the two ends of the manifold ring 4 are sealed and fixedly connected with the shroud 2 and the wheel disc 1 respectively through welding; for further explanation, annular grooves are defined on the two end surfaces of the manifold ring 4, wherein the annular grooves are arranged in an axial alignment with the manifold ring 4, wherein each of annular gaskets 5 is defined in each of the annular grooves, wherein two end surfaces of one of the annular gaskets 5 respectively contact the shroud 2 and a bottom wall of a corresponding one of the annular grooves, and two end surfaces of another one of the annular gaskets 5 respectively contact the wheel disc 1 and the bottom wall of a corresponding one of the annular grooves, thus a reliable sealing effect can be formed between the manifold ring 4, the wheel disc 1 and the shroud 2.

[0022] Referring to FIG. 2, air accumulating grooves 4a are arranged on an inner side wall of the manifold ring 4, wherein the air accumulating grooves 4a on ring-shaped are arranged in an axial alignment with the manifold ring 4, and upward sections of the air accumulating grooves 4a on the manifold ring 4 is on L-shaped, and the air accumulating grooves 4a are composed of groove side walls and groove bottom walls of vertically arranged, and the groove side walls directly face the shroud 2, and one end, far away from the air inlet 2a, of the blades 3 is abutted against the inner side wall of the manifold ring 4, in this embodiment, a distance between a preferred one of the 3 and the groove bottom walls is 15mm; connecting holes 4b penetrated through along a radial direction of the shroud 2 are arranged on the groove bottom walls, wherein a plurality of the connecting holes 4b are distributed at regular intervals along a circumferential direction of the shroud 2, and cones 6 are fixedly arranged on an outer side of the manifold ring 4, wherein axes of the cones 6 are extending along the radial direction of the shroud 2, and diameters of the cones 6 are becoming smaller gradually along a direction from the air inlet 2a to the manifold ring 4; the number of the cones 6 is the same as the number of the connecting holes 4b, and one end of each of the cones 6 is communicated with a corresponding one of the connecting holes 4b; whereby a using process is listed as follows: air is pumped into the airways 3a from the air inlet 2a and then discharged from the cones 6 with a transportation of the air accumulating grooves 4a and the connecting holes 4b.

[0023] Wherein a connection method of the cones 6 and the manifold ring 4 is listed as follows: connection parts 6a on tube-shaped are integrally molded on end surfaces of the cones 6 closing to the manifold ring 4, wherein the connection parts 6a are communicated with the cones 6 and the connection parts 6a are arranged in an axial alignment with the cones 6, and the connection parts 6a are inserted into the connecting holes 4b, and the connection parts 6a are sealed and fixedly connected with the manifold ring 4; in this embodiment, the connection parts 6a are sealed and fixedly connected with the manifold ring 4 through thread structures.

[0024] For further explanation, the connecting holes 4b are composed of tapered holes 4b1 and screw holes 4b2 distributed on same line, wherein the screw holes 4b2 are located between the tapered holes 4b] and the cones 6, wherein the connection parts 6a are threaded in the screw holes 4b2, and diameters of the tapered holes 4b1 are becoming smaller gradually along the direction from the air inlet 2a to the manifold ring 4, whereby the tapered holes 4b1 on the connecting holes 4b can further pressing the tapered holes 4b1 to increase an air pressure [0025] The embodiments described here is merely examples for the spirits of this invention. The person skilled in this art can make any amendments, supplementary or similar replacement to the specific embodiments, which will not deviate from the spirit of the invention or surpass the scope defined by the claims.

Claims

Claims 1. A new structure of centrifugal fan impeller, comprising.a wheel disc; a shroud with an air inlet and blades arranged between the wheel disc and the shroud; a plurality of the blades distributed at regular intervals along a circumferential direction of the shroud, wherein airways are formed between adjacent two of the blades, a manifold ring arranged between the shroud and the wheel disc, wherein the manifold ring is arranged in an axial alignment with the shroud, wherein the blades are located between the manifold ring and the air inlet, and two ends of the manifold ring are sealed and fixedly connected with the shroud and the wheel disc respectively, wherein air accumulating grooves are arranged on an inner side wall of the manifold ring, wherein the air accumulating grooves on ring-shaped are arranged in an axial alignment with the manifold ring, and upward sections of the air accumulating grooves on the manifold ring is on L-shaped, and the air accumulating grooves are composed of groove side walls and groove bottom walls of vertically arranged, and the groove side walls directly face the shroud, and one end, far away from the air inlet, of each of the blades is abutted against the inner side wall of the manifold ring; connecting holes which are penetrated through along a radial direction of the shroud arranged on the groove bottom walls, wherein a plurality of the connecting holes are distributed at regular intervals along a circumferential direction of the shroud; cones fixedly arranged on an outer side of the manifold ring, wherein axes of the cones are extending along the radial direction of the shroud, and diameters of the cones are becoming smaller gradually along a direction from the air inlet to the manifold ring, whereby the number of the cones is the same as the number of the connecting holes, and one end of each of the cones is communicated with a corresponding one of the connecting holes.
2. The new structure of centrifugal fan impeller defined in claim 1, wherein annular grooves are defined on the two end surfaces of the manifold ring, wherein the annular grooves are arranged in an axial alignment with the manifold ring, wherein each of annular gaskets is defined in each of the annular grooves, wherein one end surface of each of the annular gaskets is abutted against the shroud and the wheel disc, and another end surface of each of the annular gaskets is abutted against two of bottom walls of the annular grooves.
3. The new structure of centrifugal fan impeller defined in claim 1 or 2, wherein connection parts on tube-shaped are integrally molded on end surfaces of the cones closing to the manifold ring, wherein the connection parts are arranged n an ax al alignment with the cones, and the connection parts are inserted into the connecting holes, and the connection parts are sealed and fixedly connected with the manifold ring
4. The new structure of centrifugal fan impeller defined in claim 3, wherein the connection parts are sealed and fixedly connected with the manifold ring through thread structures.
5. The new structure of centrifugal fan impeller defined in claim 1 or 2, wherein the two ends of the manifold ring are sealed and fixedly connected with the shroud and the wheel disc respectively through welding