CN110966258A - Fan shell and manufacturing method thereof - Google Patents
Fan shell and manufacturing method thereof Download PDFInfo
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- CN110966258A CN110966258A CN201911168705.3A CN201911168705A CN110966258A CN 110966258 A CN110966258 A CN 110966258A CN 201911168705 A CN201911168705 A CN 201911168705A CN 110966258 A CN110966258 A CN 110966258A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 238000003825 pressing Methods 0.000 claims description 53
- 238000003466 welding Methods 0.000 claims description 24
- 238000007906 compression Methods 0.000 claims description 16
- 230000006835 compression Effects 0.000 claims description 14
- 239000002994 raw material Substances 0.000 claims description 13
- 238000009434 installation Methods 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 230000032683 aging Effects 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 239000011358 absorbing material Substances 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 6
- 238000005498 polishing Methods 0.000 claims description 5
- 229920000742 Cotton Polymers 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 229920000728 polyester Polymers 0.000 claims description 4
- 230000035882 stress Effects 0.000 claims description 4
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- 238000000576 coating method Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 12
- 239000000463 material Substances 0.000 abstract description 8
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- 238000013461 design Methods 0.000 description 8
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4226—Fan casings
- F04D29/4233—Fan casings with volutes extending mainly in axial or radially inward direction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
- B21D17/02—Forming single grooves in sheet metal or tubular or hollow articles by pressing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
- F04D29/664—Sound attenuation by means of sound absorbing material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/20—Undercarriages with or without wheels
- F16M11/24—Undercarriages with or without wheels changeable in height or length of legs, also for transport only, e.g. by means of tubes screwed into each other
- F16M11/26—Undercarriages with or without wheels changeable in height or length of legs, also for transport only, e.g. by means of tubes screwed into each other by telescoping, with or without folding
- F16M11/32—Undercarriages for supports with three or more telescoping legs
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention belongs to the technical field of fan manufacturing, and relates to a fan casing and a manufacturing method thereof, wherein the fan casing comprises a volute casing plate, a front side plate, a rear side plate and a mounting seat; the front side plate and the rear side plate are respectively connected with two sides of the volute plate, and the mounting seat is respectively connected with the front side plate and the rear side plate; the front side plate and the rear side plate are integrally formed parts, a fan shaft hole and front profiling grooves are formed in the front side plate, and the front profiling grooves are distributed on the front side plate at intervals; the rear side plate is provided with an air inlet and rear profiling grooves, and the rear profiling grooves are distributed on the rear side plate at intervals; the outlets of the front side plate, the rear side plate and the volute plate are enclosed to form an air outlet of the fan shell. The invention meets the strength requirement of the fan, simultaneously greatly reduces the total weight of the side plate, saves the material cost, reduces the weight of the fan, has better surface evenness of the front side plate and the rear side plate which are prepared by the profiling process, and prolongs the service life of the fan shell.
Description
Technical Field
The invention belongs to the technical field of fan manufacturing, and particularly relates to a fan shell and a manufacturing method thereof.
Background
In the fan industry, the manufacturing process of the shell basically has no substantial change after the technology is introduced from the Soviet Union in the 70 s, namely, the process assembly of numerical control blanking, spot welding connection, welding forming, shaping, reinforcing rib reinforcement, grinding, painting and the like is adopted; the process is suitable for medium-sized fans and small fans, but the process for manufacturing the fan shell of the medium-sized fans and the small fans needs frequent material cutting and welding, wastes a large amount of labor and material cost, has low production efficiency, and has great influence on the strength of the fan shell due to more welding parts; moreover, the fan casing welded and produced in the prior art is generally thicker in thickness and heavier in weight, and brings great burden to fan manufacturers.
Therefore, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art for 6# -16# blower housings.
Disclosure of Invention
The invention aims to provide a fan shell and a manufacturing method thereof, and aims to solve the problems that the existing fan shell is low in production efficiency, high in manufacturing cost and heavy in weight.
In order to achieve the above purpose, the invention provides the following technical scheme:
a fan casing comprises a volute casing plate, a front side plate, a rear side plate and a mounting seat.
Specifically, the front side plate and the rear side plate are respectively connected with two sides of the volute plate, and the mounting seat is respectively connected with the front side plate and the rear side plate and used for supporting the fan; the front side plate and the rear side plate are both integrally formed parts, a fan shaft hole and front profiling grooves are formed in the front side plate, and the front profiling grooves are distributed on the front side plate at intervals; the rear side plate is provided with an air inlet and rear profiling grooves, the circle center of the air inlet is collinear with the center of the fan shaft hole, and the rear profiling grooves are distributed on the rear side plate at intervals; the front side plate, the rear side plate and the outlet of the volute plate enclose to form an air outlet of the fan shell.
In the blower casing as described above, as a preferable scheme, the front profiling groove is recessed in an outer surface of the front side plate, the front profiling groove includes a front annular groove and a front outer reinforcing groove, the front annular groove is coaxial with the blower shaft hole, and an inner diameter of the front annular groove is larger than an inner diameter of the blower shaft hole; preceding outside reinforcing groove includes preceding rectangle recess and preceding arc recess, at least two preceding rectangle recess is followed the linear direction interval distribution of air outlet, preceding arc recess distributes keep away from on the preceding curb plate one side of air outlet, and distribute along the spiral line direction of fan.
In the blower housing as described above, as a preferred scheme, the rear pressing groove is recessed in the outer surface of the rear side plate, the rear pressing groove includes a rear rectangular groove and a rear arc groove, at least two of the rear rectangular grooves are distributed at intervals along the linear direction of the air outlet, and the rear arc groove is distributed on the rear side plate on a side away from the air outlet and is distributed along the direction of the spiral line of the blower.
In the blower housing as described above, as a preferable scheme, the mounting base includes support legs and a support frame, the support frame is disposed on the ground, and the blower housing is connected to the support frame through the support legs; the supporting legs are arranged in two groups, one group of supporting legs of the mounting seat is welded on the front side plate in a preset included angle, and the other group of supporting legs of the mounting seat is correspondingly welded on the rear side plate; the landing leg with for dismantling between the carriage and be connected, the landing leg includes fixed part and connecting portion, the fixed part with preceding curb plate or posterior lateral plate welding together, connecting portion cup joint in the fixed part, connecting portion can for the fixed part is flexible freely, the fixed part lateral wall is provided with fastening bolt, fastening bolt passes the lateral wall of fixed part and top tightly are in the surface of connecting portion, thereby it is fixed connecting portion.
In the blower casing, as a preferable scheme, sound-absorbing materials are laid on the outer surfaces of the front side plate and the rear side plate; preferably, the sound-absorbing material is polyester fiber sound-absorbing cotton.
In the blower housing as described above, as a preferred scheme, a plurality of positioning angle codes are arranged at intervals along the vicinity of the contour line on the inner sides of the front side plate and the rear side plate, one side of each positioning angle code is in close contact with the front side plate or the rear side plate, the other side of each positioning angle code is perpendicular to the front side plate or the rear side plate, a positioning screw hole is arranged on the other side of each positioning angle code, a positioning bolt is screwed into the positioning screw hole, and the positioning bolt heads on the plurality of positioning angle codes are located on the contour line where the inner surface of the volute plate is located.
The invention also provides a manufacturing method of the fan casing, which comprises the following steps:
s1, blanking, namely cutting steel plates with proper sizes according to the size of the fan shell to serve as raw materials of a front side plate, a rear side plate and a volute plate;
s2, using a profiling mold to perform integral cold-pressing profiling on the raw materials of the front side plate and the rear side plate respectively, so that front profiling grooves and rear profiling grooves are distributed on the front side plate and the rear side plate respectively;
s3, bending the volute plate, and bending the cut volute plate raw material to obtain a finished volute plate product;
s4, connecting the front side plate and the rear side plate which are well pressed with the two sides of the bent volute plate respectively to form a fan shell;
s5, vibration aging, namely placing the fan shell obtained in the step S4 on a vibration instrument for vibration aging treatment to eliminate internal stress in the fan shell;
and S6, coating, and spraying and decorating the fan shell subjected to the vibration aging treatment in the S5 to obtain a finished product of the fan shell.
In the manufacturing method of the blower housing as described above, it is preferable that the pressing mold in S2 is a split mold including an upper mold, a lower mold and a pressing core.
Specifically, the upper die is covered on the lower die, an upper die groove is formed in the lower surface of the upper die, and a lower die groove corresponding to the upper die groove is formed in the upper surface of the lower die; the two ends of the compression core are respectively provided with an installation part and a compression part, the external dimension of the installation part is matched with the dimensions of the upper die groove and the lower die groove, the bottom of the upper die groove and the bottom of the lower die groove are provided with compression core connecting holes, and the compression core is provided with through countersunk holes from the end surface of the compression part to the end surface of the installation part; the position of the countersink corresponds to the position of the connecting hole of the die core when the die core is mounted in the upper die groove or the lower die groove; after the press core is installed in the upper mold groove or the lower mold groove, the press part protrudes out of the surface of the upper mold or the lower mold, and when the upper mold and the lower mold are closed, the press core and the corresponding mold groove form a press groove on the front side plate or the rear side plate.
In the above method for manufacturing a blower housing, as a preferable aspect, the S2 specifically includes:
s21, basic pressing, namely, placing the raw material plate on a pressing mould, covering the upper mould and the lower mould by using a hydraulic press, wherein the pressing time is 3-7S, and the pressing force is 800-;
s22, deep pressing, namely, performing deep pressing on the plate subjected to the basic pressing in the S21 for 8-12S, and pressing at a pressing force of 1300-1700T;
and S23, completing the pressing, namely, putting the plate subjected to deep pressing in the S22 into a pressing mold for completing the pressing, wherein the pressing time is 3-7S, and the pressing force is 800-.
In the above method for manufacturing a blower housing, as a preferable aspect, the S4 specifically includes:
s41, welding a plurality of positioning corner connectors on the inner sides of the front side plate and the rear side plate respectively;
s42, respectively installing the front side plate and the rear side plate on two sides of the volute casing plate, and supporting the inner side of the volute casing plate by screwing the positioning bolts on the positioning corner connectors so that the edge of the volute casing plate is aligned with the edges of the front side plate and the rear side plate;
and S43, welding the edge joints of the volute plate, the front side plate and the rear side plate in the volute plate, and polishing the welded joints to be smooth.
Compared with the closest prior art, the technical scheme provided by the invention has the following beneficial effects:
compared with the conventional fan shell production, the fan shell has the advantages that the side plates of the fan shell are prepared by the compression process, the strength requirement is met, the total weight of the side plates is greatly reduced, the material cost is saved, the weight of the fan is reduced, the surface flatness of the front side plate and the rear side plate prepared by the compression process is good, and the service life of the fan shell is effectively prolonged. The surface through at preceding curb plate and posterior lateral plate sets up sound absorbing material and makes the noise and the vibration of fan further reduce, has optimized the operational environment of fan. The design of adjustable angle between mount pad and the fan casing has expanded the application occasion of fan. The invention adopts a split type mould, the moulding core is arranged in the mould, and the position of the moulding core can be arranged according to the requirement, so that one set of mould can be used for moulding the front side plate and the rear side plate of the same fan, the quantity of the mould is greatly saved, and the same set of moulding mould is suitable for moulding the side plates of the fan shells of a plurality of models with similar sizes in the mould design, namely a plurality of models share one set of mould. The generalized mold design greatly reduces mold development costs and mold inventory.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. Wherein:
FIG. 1 is a schematic structural diagram of a blower housing according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a front plate according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a rear side panel according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a mold according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a lower mold according to an embodiment of the present invention;
FIG. 6 is a schematic view of the construction of an annular press core according to an embodiment of the invention;
FIG. 7 is a schematic structural view of a rectangular press core according to an embodiment of the present invention;
FIG. 8 is a schematic view of a first arcuate press core in accordance with an embodiment of the present invention;
FIG. 9 is a schematic view of a second arcuate press core in accordance with an embodiment of the present invention;
FIG. 10 is a schematic structural diagram of a mounting base according to an embodiment of the present invention;
fig. 11 is a schematic structural view of a leg according to an embodiment of the present invention.
In the figure: 1. a front side plate; 2. a rear side plate; 3. a volute plate; 4. an air inlet; 5. an air outlet; 6. a front annular groove; 7. a front arc-shaped groove; 8. a fan shaft hole; 9. a front rectangular groove; 10. a rear rectangular groove; 11. a rear arc-shaped groove; 12. a mounting seat; 13. a support leg; 14. a support frame; 15. a connecting portion; 16. a fixed part; 17. an upper die; 18. a lower die; 19. an upper die recess; 20. a lower die groove; 21. a countersink; 22. an annular press core; 23. a rectangular press core; 24. a first arc-shaped press core; 25. and the second arc-shaped press core.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are for convenience of description of the present invention only and do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected" and "connected" used herein should be interpreted broadly, and may include, for example, a fixed connection or a detachable connection; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.
According to an embodiment of the present invention, as shown in fig. 1 to 11, the present invention provides a blower housing, which includes a volute plate 3, a front side plate 1, a rear side plate 2 and a mounting base 12.
Specifically, the front side plate 1 and the rear side plate 2 are respectively connected with two sides of the volute plate 3, and the mounting seat 12 is respectively connected with the front side plate 1 and the rear side plate 2 for supporting the fan. Preceding curb plate 1 and posterior lateral plate 2 are integrated into one piece spare, are provided with fan shaft hole 8 and preceding die mould recess on preceding curb plate 1, and a plurality of preceding die mould recess interval distribution are on preceding curb plate 1. An air inlet 4 and a rear compression groove are formed in the rear side plate 2, the circle center of the air inlet 4 is collinear with the center of the fan shaft hole 8, and the rear compression grooves are distributed on the rear side plate 2 at intervals. The front side plate 1, the rear side plate 2 and the outlet of the volute plate 3 enclose to form an air outlet 5 of the fan shell.
Furthermore, the area of the front profiling groove is 0.4-0.6 times of the area of the front side plate 1, and the area of the rear profiling groove is 0.4-0.6 times of the area of the rear side plate 2; preferably, the area of the front profiled groove is 0.5 times the area of the front side plate 1, and the area of the rear profiled groove is 0.5 times the area of the rear side plate 2.
When using, because set up the die mould recess on preceding curb plate 1 and the posterior lateral plate 2, strengthened preceding curb plate 1 and posterior lateral plate 2's intensity greatly, the thickness that makes preceding curb plate 1 and posterior lateral plate 2 when satisfying the intensity needs reduces greatly, and needn't set up the reinforced rib plate again, has both reduced fan casing weight, greatly reduced the welding position, reduced the installation volume, and make the fan casing more pleasing to the eye.
Furthermore, the front profiling groove is recessed in the outer surface of the front side plate 1 and comprises a front annular groove 6 and a front external reinforcing groove, the front annular groove 6 is coaxial with the fan shaft hole 8, and the inner diameter of the front annular groove 6 is larger than that of the fan shaft hole 8; preceding outside reinforcing groove is including preceding rectangle recess 9 and preceding arc recess 7, and rectangle recess 9 distributes along the linear direction interval of air outlet 5 before two at least, and preceding arc recess 7 distributes and keeps away from one side of air outlet 5 on preceding curb plate 1, and distributes along the spiral line direction of fan. The strength of each part of the front side plate 1 and the rear side plate 2 is ensured to be uniform by arranging a plurality of profiling grooves arranged at intervals.
Further, back die mould recess is sunken in the surface of posterior lateral plate 2, and back die mould recess includes back rectangle recess 10 and back arc recess 11, and two at least back rectangle recesses 10 are along the linear direction interval distribution of air outlet 5, and back arc recess 11 distributes and keeps away from one side of air outlet 5 on posterior lateral plate 2, and distributes along the spiral line direction of fan.
The overall strength of the fan shell is the most critical factor influencing the service life, and the key of the product is how to optimize the strength of the fan shell; the fan shell is a static part in the fan system, so that only three factors of the strength, the flatness and the aesthetic feeling of the shell are considered; according to the invention, the front side plate 1 and the rear side plate 2 which are produced by the whole sheet profiling process meet the strength and reduce the material weight, the surface flatness of the front side plate 1 and the rear side plate 2 is ensured, and the appearance of the manufactured fan shell is more beautiful.
Further, the mounting seat 12 comprises supporting legs 13 and a supporting frame 14, the supporting frame 14 is arranged on the ground, and the blower casing is connected with the supporting frame 14 through the supporting legs 13; two groups of supporting legs 13 are arranged, one group of supporting legs 13 of the mounting base 12 is welded on the front side plate 1 at a preset included angle, and the other group of supporting legs 13 of the mounting base 12 is correspondingly welded on the rear side plate 2; landing leg 13 and braced frame 14 are connected for dismantling between, and landing leg 13 includes fixed part 16 and connecting portion 15, and fixed part 16 and preceding curb plate 1 or rear side board 2 welding together, and connecting portion 15 cup joints in fixed part 16, and connecting portion 15 can freely stretch out and draw back for fixed part 16, and the fixed part 16 lateral wall is provided with fastening bolt, and fastening bolt passes the lateral wall of fixed part 16 and pushes up tight on the surface of connecting portion 15 to fixed connection portion 15. In this embodiment, the fixing portion 16 and the connecting portion 15 are both square tubes, and one end of the connecting portion 15 is connected to the support frame 14 by a bolt. Through setting up the structure that connecting portion 15 and fixed part 16 cup jointed, can change the length of each landing leg 13 to make the contained angle between air outlet 5 and the horizontal plane adjustable, satisfy different fan installation demands.
In other embodiments of the present invention, the extensible support legs 13 may not be provided, a plurality of sets of mounting stations corresponding to the mounting seats 12 are provided on the front side plate 1 and the rear side plate 2, and the included angles between the air outlet directions of the air outlets 5 and the horizontal plane are different when the mounting seats 12 are mounted on different mounting stations. Specifically, the mounting station comprises a plurality of mounting screw holes, a plurality of mounting holes are correspondingly arranged on the mounting base 12, the connecting bolts pass through the mounting holes and are screwed into the mounting screw holes to realize the mounting of the mounting base 12, and the mounting screw holes on the rest unused mounting stations are also provided with the connecting bolts; preferably, a lock washer is installed between the connection bolt and the front or rear side plate 1 or 2. When the mounting seat 12 is used, the mounting seat is mounted on a proper mounting station according to requirements, and mounting screw holes on other mounting stations are plugged by connecting bolts to prevent air leakage. Because the fan is big in the operation in-process vibration, set up lock washer and avoided being connected between preceding curb plate 1 or posterior lateral plate 2 and mount pad 12 not hard up. When the air outlet device is used, a proper mounting station is selected according to the angle of the air outlet 5 (between the air outlet 5 and the plane where the mounting seat 12 is located) as required, and the mounting seat 12 is mounted on the mounting station, so that the fan can meet the requirements of different air outlet angles.
Further, sound-absorbing materials (not shown) are laid on the outer surfaces of the front side plate 1 and the rear side plate 2; the vibration and noise generated in the running process of the fan are absorbed, so that the influence of the running of the fan on the environment is smaller; preferably, the sound absorbing material is polyester fiber sound absorbing cotton. The polyester fiber sound-absorbing cotton is low in cost, simple in laying and good in sound-absorbing and vibration-absorbing effects.
Furthermore, a plurality of positioning angle codes (not shown) are arranged on the inner sides of the front side plate 1 and the rear side plate 2 at intervals along the vicinity of the contour line, one side of each positioning angle code is connected with the front side plate 1 or the rear side plate 2 in a clinging manner, the other side of each positioning angle code is perpendicular to the front side plate 1 or the rear side plate 2, a positioning screw hole is formed in the other side of each positioning angle code, a positioning bolt is screwed into the positioning screw hole, and positioning bolt heads on the plurality of positioning angle codes are located on the contour line where the inner surface of the volute plate 3 is located. When the welding machine is used, the contour lines of the volute plate 3 and the front side plate 1 or the rear side plate 2 can be quickly aligned and welded, so that the assembly of the fan shell is greatly facilitated, the manufacturing time is saved, and the manufacturing difficulty of the fan shell is reduced.
The invention also provides a manufacturing method of the fan casing, which comprises the following steps:
and S1, blanking, and cutting Q345B steel plates with proper sizes according to the size of the fan shell to be used as raw materials of the front side plate 1, the rear side plate 2 and the volute plate 3. In the embodiment of the invention, the Q345B steel plate is used as the raw material for manufacturing the fan shell, so that the advantages are many, and firstly, the material is relatively easy to obtain in the market; secondly, the strength (tensile strength) of the Q345B steel plate is 350MPa, and the strength can reach 500-600MPa after the steel plate is pressed. According to the invention, a Q345B steel plate with the thickness of 2-10mm is selected, the strength of the pressed steel plate can meet the strength requirement of a side plate of a fan with the size below 16#, the fan is divided into a plurality of series according to different purposes, each series of fans is different in size, the fans with different sizes correspond to the sizes of the fans, generally, the distance of diagonal blades is based, for example, the distance is 1000mm, the corresponding size is 10#, and the distance of 16#, namely the diagonal blades, is about 1600 mm. Because the fan with an over-large size has high strength requirement on the side plates, the strength can be solved by the pressure-dependent type, but a larger hydraulic press is needed, at least more than 3000 tons is needed, and the cost performance is too low; the fan front and rear panels 1, 2 profiling of the present application therefore preferably produces fans below # 16, for example the preparation of fan casings from # 4 to # 16, of the type having a fan casing side dimension of 0.5m by 3.2m by 2.2 m.
S2, performing integral cold pressing and profiling on the raw materials of the front side plate 1 and the rear side plate 2 by using profiling dies, so that front profiling grooves and rear profiling grooves are distributed on the front side plate 1 and the rear side plate 2 respectively; the cold press molding is hydraulic cold press molding, and the steps specifically comprise:
s21, basic pressing, namely, placing the raw material plate on a pressing mold, covering the upper mold 17 and the lower mold 18 by using a hydraulic press, wherein the pressing time is 3-7S, and the pressing force is 800-1200T, preferably 1000T (namely 1000 tons);
s22, deep pressing, namely, performing deep pressing on the plate subjected to the basic pressing in the S21 for 8-12S, wherein the pressing force is 1300-1700T, and preferably 1500T;
s23, completing the pressing, namely placing the plate subjected to deep pressing in the S22 in a pressing mold for completing the pressing, wherein the pressing time is 3-7S, and the pressing force is 800-1200T, preferably 1000T. The pressing grooves meeting the requirements can be processed through three-time pressing, and the flatness of the front side plate 1 and the flatness of the rear side plate 2 can also be guaranteed.
S3, bending the volute plate 3, and bending the cut volute plate 3 raw material to obtain a finished volute plate 3;
s4, connecting the front side plate 1 and the rear side plate 2 which are well pressed with the two sides of the bent volute plate 3 respectively to form a fan shell; the method specifically comprises the following steps:
s41, welding a plurality of positioning corner connectors on the inner sides of the front side plate 1 and the rear side plate 2 respectively;
s42, respectively installing the front side plate 1 and the rear side plate 2 on two sides of the volute plate 3, and supporting the inner side of the volute plate 3 by screwing the positioning bolts on the positioning corner connectors so that the edge of the volute plate 3 is aligned with the edges of the front side plate 1 and the rear side plate 2;
and S43, welding the edge joints of the volute plate 3 and the front side plate 1 and the rear side plate 2 in the volute plate 3, and polishing the welded joints to be flat. The welding adopts 45 degrees angle welding, carries out carbon dioxide protection welding in the contained angle department of two welded plates promptly, and this welding mode welding speed is fast, the melting point is high, welding effect is good. During polishing, firstly, the iron slag falling during welding is removed by a polishing machine, secondly, the irregular welding position which is carelessly welded is coated and filled with iron putty powder, and then the whole body is polished to be smooth.
S5, vibration aging, namely placing the fan shell obtained in the step S4 on a vibration instrument for vibration aging treatment to eliminate internal stress in the fan shell; in this step, the vibration apparatus is a high-frequency vibration apparatus, and the vibration time is 8-13 minutes, preferably 10 minutes, until the stress is mostly dissipated.
And S6, coating, and spraying and decorating the fan shell subjected to the vibration aging treatment in the S5 to obtain a finished product of the fan shell.
Further, as shown in fig. 4 to 9, the profiling mold in S2 is a split mold including an upper mold 17, a lower mold 18 and a profiling core; the upper die 17 covers the lower die 18, the lower surface of the upper die 17 is provided with an upper die groove 19, and the upper surface of the lower die 18 is provided with a lower die groove 20 corresponding to the upper die groove 19; the two ends of the press core are respectively provided with an installation part and a press part, the external dimension of the installation part is matched with the dimensions of the upper die groove 19 and the lower die groove 20, the bottoms of the upper die groove 19 and the lower die groove 20 are provided with press core connecting holes, and the press core is provided with through countersunk holes 21 from the end surface of the press core to the end surface of the installation part; the position of the countersink 21 corresponds to the position of the connecting hole of the die when the die is mounted in the upper die groove 19 or the lower die groove 20; the press core is arranged in the upper mould groove 19 or the lower mould groove 20, the back press part protrudes out of the surface of the upper mould 17 or the lower mould 18, and the press groove on the front side plate 1 or the back side plate 2 is formed before the press core and the corresponding mould groove after the upper mould 17 and the lower mould 18 are covered. Through the design of the detachable press core, the mounting position of the press core (namely, the press core is mounted in the upper mould groove or the lower mould groove) can be selected according to the front side plate 1 and the rear side plate 2 which are pressed according to requirements when the press core is used. In the embodiment of the present invention, the press core is divided into the ring-shaped press core 22, the rectangular press core 23 and the arc-shaped press core, and since the front arc-shaped press groove and the rear arc-shaped press groove cannot share one set of press cores, two arc-shaped press cores, respectively, the first arc-shaped press core 24 and the second arc-shaped press core 25 are provided. As seen in fig. 1 and 4 to 9, when the front side plate 1 is molded, the press core (including the annular press core 22, the plurality of rectangular press cores 23 and the second arc-shaped press core 25) may be mounted on the upper mold 17, and when the rear side plate 2 is molded, the press core (including the annular press core 22, the plurality of rectangular press cores 23 and the first arc-shaped press core 24) may be mounted on the lower mold 18, thereby implementing two side plates (the front side plate 1 and the rear side plate 2) of the same set of mold molding fans. When the profiling mold is used, the profiling mold can be designed according to the size of the side plate of the fan shell with similar size, so that the position of the profiling core is positioned at the superposition position of the side plates of the fan shells with multiple models, the same profiling mold is suitable for profiling the side plates of the fan shells with multiple models with similar size, and multiple models share one set of mold. The generalized mold design greatly reduces mold development costs and mold inventory.
Taking the preparation of a 10# fan side plate as an example, the steel plate after 5mm is adopted for welding in the conventional mode, and the reinforcing rib is arranged on the outer surface of the side plate (including the front side plate 1 and the rear side plate 2), the total weight of the front side plate 1 and the rear side plate 2 is about 300kg generally, after the compression molding process of the application is adopted, the thickness of the front side plate 1 and the rear side plate 2 only needs 3mm, and the reinforcing rib is not required to be arranged, the total weight of the manufactured front side plate 1 and the manufactured rear side plate 2 is about 200kg, namely, the total weight of the front side plate 1 and the rear side plate 2 of the fan shell prepared by the compression molding process can be reduced by about one third on the premise of meeting the strength requirement, and the material cost and the processing and manufacturing cost are greatly.
In conclusion, the blower casing provided by the invention has the advantages that the side plates of the blower casing are prepared by the compression technology, compared with the conventional blower casing production, the overall weight of the side plates is greatly reduced while the strength requirement is met, the material cost is saved, the weight of the blower is reduced, the surface flatness of the front side plate and the rear side plate prepared by the compression technology is good, and the service life of the blower casing is effectively prolonged. The surface through at preceding curb plate and posterior lateral plate sets up sound absorbing material and makes the noise and the vibration of fan further reduce, has optimized the operational environment of fan. The design of adjustable angle between mount pad and the fan casing has expanded the application occasion of fan. The invention adopts a split type mould, the moulding core is arranged in the mould, and the position of the moulding core can be arranged according to the requirement, so that one set of mould can be used for moulding the front side plate and the rear side plate of the same fan, the quantity of the mould is greatly saved, and the same set of moulding mould is suitable for moulding the side plates of the fan shells of a plurality of models with similar sizes in the mould design, namely a plurality of models share one set of mould. The generalized mold design greatly reduces mold development costs and mold inventory.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A fan shell is characterized by comprising a volute plate, a front side plate, a rear side plate and a mounting seat;
the front side plate and the rear side plate are respectively connected with two sides of the volute plate, and the mounting seats are respectively connected with the front side plate and the rear side plate and used for supporting a fan;
the front side plate and the rear side plate are both integrally formed parts, a fan shaft hole and front profiling grooves are formed in the front side plate, and the front profiling grooves are distributed on the front side plate at intervals;
the rear side plate is provided with an air inlet and rear profiling grooves, the circle center of the air inlet is collinear with the center of the fan shaft hole, and the rear profiling grooves are distributed on the rear side plate at intervals;
the front side plate, the rear side plate and the outlet of the volute plate enclose to form an air outlet of the fan shell.
2. The blower housing of claim 1, wherein the front profiled groove is recessed in an outer surface of the front side plate, the front profiled groove comprising a front annular groove and a front outer reinforcing groove, the front annular groove being coaxial with the blower shaft hole, the front annular groove having an inner diameter greater than an inner diameter of the blower shaft hole; preceding outside reinforcing groove includes preceding rectangle recess and preceding arc recess, at least two preceding rectangle recess is followed the linear direction interval distribution of air outlet, preceding arc recess distributes keep away from on the preceding curb plate one side of air outlet, and distribute along the spiral line direction of fan.
3. The blower housing according to claim 1, wherein the rear pressed groove is recessed in an outer surface of the rear side plate, the rear pressed groove includes a rear rectangular groove and a rear arc groove, at least two rear rectangular grooves are spaced apart from each other along a straight line of the air outlet, and the rear arc groove is distributed on a side of the rear side plate away from the air outlet and distributed along a spiral line of the blower.
4. The blower enclosure of claim 1, wherein the mounting base includes legs and a support frame, the support frame being disposed on the ground, the blower enclosure being connected to the support frame via the legs;
the supporting legs are arranged in two groups, one group of supporting legs of the mounting seat is welded on the front side plate in a preset included angle, and the other group of supporting legs of the mounting seat is correspondingly welded on the rear side plate;
the landing leg with for dismantling between the carriage and be connected, the landing leg includes fixed part and connecting portion, the fixed part with preceding curb plate or posterior lateral plate welding together, connecting portion cup joint in the fixed part, connecting portion can for the fixed part is flexible freely, the fixed part lateral wall is provided with fastening bolt, fastening bolt passes the lateral wall of fixed part and top tightly are in the surface of connecting portion, thereby it is fixed connecting portion.
5. The blower housing according to claim 1, wherein sound absorbing material is laid on outer surfaces of the front side plate and the rear side plate;
preferably, the sound-absorbing material is polyester fiber sound-absorbing cotton.
6. The blower housing according to claim 1, wherein a plurality of positioning angle codes are arranged on inner sides of the front side plate and the rear side plate at intervals along a vicinity of a contour line, one side of each positioning angle code is connected with the front side plate or the rear side plate in a tightly attached manner, the other side of each positioning angle code is perpendicular to the front side plate or the rear side plate, a positioning screw hole is formed in the other side of each positioning angle code, a positioning bolt is screwed into the positioning screw hole, and positioning bolt heads on the plurality of positioning angle codes are located on a contour line where an inner surface of the volute plate is located.
7. A manufacturing method of a fan casing, which is the fan casing of any one of claims 1 to 6, the manufacturing method of the fan casing comprising the following steps:
s1, blanking, namely cutting steel plates with proper sizes according to the size of the fan shell to serve as raw materials of a front side plate, a rear side plate and a volute plate;
s2, using a profiling mold to perform integral cold-pressing profiling on the raw materials of the front side plate and the rear side plate respectively, so that front profiling grooves and rear profiling grooves are distributed on the front side plate and the rear side plate respectively;
s3, bending the volute plate, and bending the cut volute plate raw material to obtain a finished volute plate product;
s4, connecting the front side plate and the rear side plate which are well pressed with the two sides of the bent volute plate respectively to form a fan shell;
s5, vibration aging, namely placing the fan shell obtained in the step S4 on a vibration instrument for vibration aging treatment to eliminate internal stress in the fan shell;
and S6, coating, and spraying and decorating the fan shell subjected to the vibration aging treatment in the S5 to obtain a finished product of the fan shell.
8. The manufacturing method of the blower housing according to claim 7, wherein the profiling mold in the step S2 is a split mold comprising an upper mold, a lower mold and a profiling core;
the upper die is covered on the lower die, an upper die groove is formed in the lower surface of the upper die, and a lower die groove corresponding to the upper die groove is formed in the upper surface of the lower die;
the two ends of the compression core are respectively provided with an installation part and a compression part, the external dimension of the installation part is matched with the dimensions of the upper die groove and the lower die groove, the bottom of the upper die groove and the bottom of the lower die groove are provided with compression core connecting holes, and the compression core is provided with through countersunk holes from the end surface of the compression part to the end surface of the installation part; the position of the countersink corresponds to the position of the connecting hole of the die core when the die core is mounted in the upper die groove or the lower die groove;
after the press core is installed in the upper mold groove or the lower mold groove, the press part protrudes out of the surface of the upper mold or the lower mold, and when the upper mold and the lower mold are closed, the press core and the corresponding mold groove form a press groove on the front side plate or the rear side plate.
9. The manufacturing method of the blower housing according to claim 7, wherein the S2 specifically includes:
s21, basic pressing, namely, placing the raw material plate on a pressing mould, covering the upper mould and the lower mould by using a hydraulic press, wherein the pressing time is 3-7S, and the pressing force is 800-;
s22, deep pressing, namely, performing deep pressing on the plate subjected to the basic pressing in the S21 for 8-12S, and pressing at a pressing force of 1300-1700T;
and S23, completing the pressing, namely, putting the plate subjected to deep pressing in the S22 into a pressing mold for completing the pressing, wherein the pressing time is 3-7S, and the pressing force is 800-.
10. The manufacturing method of the blower housing according to claim 7, wherein the S4 specifically includes:
s41, welding a plurality of positioning corner connectors on the inner sides of the front side plate and the rear side plate respectively;
s42, respectively installing the front side plate and the rear side plate on two sides of the volute casing plate, and supporting the inner side of the volute casing plate by screwing the positioning bolts on the positioning corner connectors so that the edge of the volute casing plate is aligned with the edges of the front side plate and the rear side plate;
and S43, welding the edge joints of the volute plate, the front side plate and the rear side plate in the volute plate, and polishing the welded joints to be smooth.
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| CN201911168705.3A CN110966258A (en) | 2019-11-25 | 2019-11-25 | Fan shell and manufacturing method thereof |
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| CN201911168705.3A CN110966258A (en) | 2019-11-25 | 2019-11-25 | Fan shell and manufacturing method thereof |
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| CN114273536A (en) * | 2021-12-13 | 2022-04-05 | 湖南创研智能装备有限公司 | Spiral case equipment |
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