CN210033946U

CN210033946U - Special impeller for lime kiln tail draught fan

Info

Publication number: CN210033946U
Application number: CN201920884057.0U
Authority: CN
Inventors: 胡志军
Original assignee: Hebei Huasheng Environmental Protection Equipment Technology Co Ltd
Current assignee: Hebei Huasheng Environmental Protection Equipment Technology Co Ltd
Priority date: 2019-06-13
Filing date: 2019-06-13
Publication date: 2020-02-07
Anticipated expiration: 2029-06-13

Abstract

The utility model discloses a special impeller for a lime kiln tail draught fan, which comprises a front disc and a rear disc, wherein blades are arranged between the front disc and the rear disc, a connecting sheet is arranged between two adjacent blades, the front disc is of an integrated cambered surface structure which is concave inwards, the rear disc is of a planar structure, the front disc is parallel to the rear disc, and the middle part of the rear disc is provided with an integrated shaft disc; the middle part of the shaft disc is provided with an arc-shaped groove with the radius gradually reduced, the top of the groove is provided with double-layer filter screens, filter cloth is filled between the filter screens, and a shaft sleeve at the bottom of the groove is lower than the top of the groove; the smooth curved surface structure of blade formula as an organic whole, projection and the coincidence of second side of first side to back dish, the inboard side of blade is higher than the outside limit of blade, and the junction of first side and preceding dish, the junction of second side and back dish all are equipped with wear-resisting strengthening rib, and the inboard side of blade has the wearing layer. The utility model adopts the above structure special impeller of lime kiln tail draught fan reduces the wearing and tearing of impeller and reel, improves the life of impeller.

Description

Special impeller for lime kiln tail draught fan

Technical Field

The utility model relates to a fan impeller technical field especially relates to a lime kiln tail special impeller of draught fan.

Background

The induced draft fan is widely used for ventilation and induced draft of boilers and industrial furnaces, the working principle of the induced draft fan is basically the same as that of a turbine compressor, and only because the gas flow rate is low and the pressure change is not large, the change of the specific volume of the gas is generally not required to be considered, namely the gas is treated as incompressible fluid.

Because the air of lime kiln tail department contains the lime floating dust of a certain amount, the draught fan ubiquitous wearing and tearing problem, when dust removal effect is poor, the wearing and tearing aggravation of draught fan. When the impeller of the induced draft fan is abraded to a certain degree, the impeller vibrates and the efficiency is reduced, and the air quantity is insufficient after the impeller is seriously abraded. After the reel is corroded and abraded by white dust and floating dust, the fixing bolt on the reel is loosened, and meanwhile, abrasion of the shaft sleeve is accelerated, so that the impeller is unstable in operation, and production accidents are easily caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a special impeller of lime kiln tail draught fan reduces the wearing and tearing of impeller and reel, improves the life of impeller.

In order to achieve the purpose, the utility model provides a special impeller for a lime kiln tail draught fan, which comprises a front disc and a rear disc, wherein blades are arranged between the front disc and the rear disc, a connecting sheet is arranged between two adjacent blades, the front disc is of an integrated cambered surface structure which is concave inwards, the rear disc is of a plane structure, the front disc is parallel to the rear disc, and the middle part of the rear disc is provided with an integrated shaft disc;

the middle part of the shaft disc is provided with an arc-shaped groove with the radius gradually reduced, the top of the groove is provided with double layers of filter screens, filter cloth is filled between the filter screens, and a shaft sleeve at the bottom of the groove is lower than the top of the groove;

the blade is of an integrated smooth curved surface structure, the blade is connected with the front disc through a first side edge and is connected with the rear disc through a second side edge, the projection from the first side edge to the rear disc is superposed with the second side edge, the inner side edge of the blade is higher than the outer side edge of the blade, wear-resistant reinforcing ribs are arranged at the joint of the first side edge and the front disc and the joint of the second side edge and the rear disc, and a wear-resistant layer is arranged on the inner side edge of the blade;

the connecting piece is of an integrated ring structure and is located in the middle between the rear disc and the rear end face of the front disc, the connecting piece is parallel to the rear disc, wear-resistant reinforcing ribs are arranged on the side edges, connected with the blades, of the connecting piece, and a wear-resistant layer is arranged on the inner side edge of the connecting piece.

Preferably, the shaft disc is connected with the rear disc through a fixing piece, the fixing piece is located on the arc surface of the groove, and the fixing piece is symmetrically arranged on the outer side of the shaft sleeve.

Preferably, the length of the connecting piece is not less than one third of the length of the blade and not more than one half of the length of the blade.

Therefore, the utility model adopts the above structure special impeller of lime kiln tail draught fan, reduce the wearing and tearing of impeller and reel, improve the life of impeller.

The technical solution of the present invention is further described in detail by the accompanying drawings and examples.

Drawings

FIG. 1 is a schematic view of an embodiment of a special impeller for a lime kiln tail draught fan;

FIG. 2 is a schematic view of the embodiment of the middle shaft disk of the special impeller of the induced draft fan at the tail of the lime kiln.

Reference numerals

1. A front plate; 2. a rear disc; 3. a blade; 301. a first side edge; 302. a second side edge; 4. connecting sheets; 401. an inner side edge; 5. a reel; 6. a groove; 7. a fixing member; 8. a shaft sleeve; 9. a filter screen; 10. filtering cloth; 11. wear-resistant reinforcing ribs; 12. and a wear-resistant layer.

Detailed Description

The following describes embodiments of the present invention with reference to the accompanying drawings.

Fig. 1 is the utility model discloses the schematic diagram of special impeller embodiment of lime kiln tail draught fan, fig. 2 is the utility model discloses the schematic diagram of the reel embodiment in the special impeller of lime kiln tail draught fan, as shown in the figure, a special impeller of lime kiln tail draught fan, including front bezel 1 and back plate 2, be equipped with blade 3 between front bezel 1 and the back plate 2, be equipped with connection piece 4 between two adjacent blades 3. Preceding dish 1 formula is to the cambered surface structure of indent as an organic whole, and back plate 2 is planar structure, and preceding dish 1 is on a parallel with back plate 2, and the middle part of back plate 2 is equipped with integral type reel 5.

The middle part of the shaft disc 5 is provided with an arc-shaped groove 6 with the radius gradually reduced, and the groove 6 with the arc-shaped structure has no dead angle, so that dust is not adhered and accumulated. The reel 5 is connected with the rear disc 2 through a fixing piece 7, the fixing piece 7 is located on the arc surface of the groove 6, and the fixing piece 7 is symmetrically arranged on the outer side of the shaft sleeve 8, so that the reel 5 is stably fixed on the rear disc 2. The shaft sleeve 8 at the bottom of the groove 6 is lower than the top of the groove 6, and the shaft sleeve 8 is used for installing the main shaft. The top of recess 6 is equipped with double-deck filter screen 9, and it has filter cloth 10 to fill between the filter screen 9, and double-deck filter screen 9 is used for supporting filter cloth 10, increases filter cloth 10's intensity, and filter cloth 10 is arranged in stopping the lime floating dust in the air and gets into recess 6, avoids the erosion and the wearing and tearing of lime floating dust to mounting 7 and axle sleeve 8.

The blade 3 is the smooth curved surface structure of integral type, reduces the resistance when wind passes through blade 3, noise reduction. The blade 3 is connected with the front disc 1 through a first side edge 301 and is connected with the rear disc 2 through a second side edge 302, the projection of the first side edge 301 to the rear disc 2 is overlapped with the second side edge 302, and the inner side edge of the blade 3 is higher than the outer side edge of the blade 3. The joints of the first side edge 301 and the front disc 1 and the joints of the second side edge 302 and the rear disc 2 are provided with wear-resistant reinforcing ribs 11, and the wear-resistant reinforcing ribs 11 are used for increasing the connection strength and the wear resistance of the joints of the blades 3 and the front disc 1 and the joints of the blades 3 and the rear disc 2. The inner side edge of the blade 3 is provided with a wear-resistant layer 12, so that the part of the blade 3 which is easy to wear is protected, and the wear resistance of the blade 3 is improved.

Connection piece 4 formula ring structure as an organic whole, and be located the middle part between 2 and the preceding 1 rear end faces of dish of rear disc, the design of 4 formula ring structures of connection piece can increase the intensity of connection piece 4. The connecting piece 4 is parallel to the back plate 2, and the connecting piece 4 is used for increasing the overall strength of the blade 3. The length of the connecting piece 4 is not less than one third of the length of the blade 3 and not more than one half of the length of the blade 3. Be equipped with wear-resisting strengthening rib 11 on the side that connection piece 4 and blade 3 are connected, increase the wearability when increasing connection strength of connection piece 4 and blade 3. The inner side 401 of the connecting piece 4 is provided with a wear-resistant layer 12, so that the wear resistance of the easily worn part of the blade 3 is improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those skilled in the art should understand that: the technical solution of the present invention can still be modified or replaced by other equivalent means, and the modified technical solution can not be separated from the spirit and scope of the technical solution of the present invention.

Claims

1. The utility model provides a special impeller of lime kiln tail draught fan, includes front bezel and back disk, the front bezel with be equipped with blade, its characterized in that between the back disk: a connecting sheet is arranged between every two adjacent blades, the front disc is of an integrated inward-concave cambered surface structure, the rear disc is of a plane structure, the front disc is parallel to the rear disc, and an integrated shaft disc is arranged in the middle of the rear disc;

2. The special impeller for the lime kiln tail induced draft fan as claimed in claim 1, wherein: the shaft disc is connected with the rear disc through a fixing piece, the fixing piece is located on the arc surface of the groove, and the fixing piece is symmetrically arranged on the outer side of the shaft sleeve.

3. The special impeller for the lime kiln tail induced draft fan as claimed in claim 2, wherein: the length of the connecting piece is not less than one third of the length of the blade and not more than one half of the length of the blade.