CN116906372B - Corrosion-resistant axial flow fan for conveying corrosive gas - Google Patents

Corrosion-resistant axial flow fan for conveying corrosive gas Download PDF

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Publication number
CN116906372B
CN116906372B CN202311105890.8A CN202311105890A CN116906372B CN 116906372 B CN116906372 B CN 116906372B CN 202311105890 A CN202311105890 A CN 202311105890A CN 116906372 B CN116906372 B CN 116906372B
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CN
China
Prior art keywords
fixed
opening
closing plate
axial flow
corrosion
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Active
Application number
CN202311105890.8A
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Chinese (zh)
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CN116906372A (en
Inventor
张国高
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Dongguan Accor Ventilation Equipment Manufacturing Co ltd
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Dongguan Accor Ventilation Equipment Manufacturing Co ltd
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Priority to CN202311105890.8A priority Critical patent/CN116906372B/en
Publication of CN116906372A publication Critical patent/CN116906372A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/60Mounting; Assembling; Disassembling
    • F04D29/64Mounting; Assembling; Disassembling of axial pumps
    • F04D29/644Mounting; Assembling; Disassembling of axial pumps especially adapted for elastic fluid pumps
    • F04D29/646Mounting or removal of fans
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00Axial-flow pumps
    • F04D19/002Axial flow fans
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00Pumping installations or systems
    • F04D25/02Units comprising pumps and their driving means
    • F04D25/06Units comprising pumps and their driving means the pump being electrically driven
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/26Rotors specially for elastic fluids
    • F04D29/32Rotors specially for elastic fluids for axial flow pumps
    • F04D29/325Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • F04D29/327Rotors specially for elastic fluids for axial flow pumps for axial flow fans with non identical blades
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/26Rotors specially for elastic fluids
    • F04D29/32Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38Blades
    • F04D29/388Blades characterised by construction

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention discloses an anti-corrosion axial flow fan for conveying corrosive gas, and relates to the technical field of axial flow fans. According to the invention, when the impeller is required to be integrally disassembled, the locking frame is manually rotated, so that the first opening and closing plate and the second opening and closing plate can be respectively turned and opened to two sides, the impeller can be integrally disassembled and maintained under the condition that the shell is not disassembled from an external pipeline, and the surface of the blade after long-time use is coated with the anti-corrosion material again, so that the integral service life is ensured, the integral disassembly and assembly are more convenient, and the integral working efficiency is effectively improved.

Description

Corrosion-resistant axial flow fan for conveying corrosive gas
Technical Field
The invention relates to the technical field of axial flow fans, in particular to an anti-corrosion axial flow fan for conveying corrosive gas.
Background
The anti-corrosion axial flow fan has very wide application, namely, the fan is operated in an axial flow mode by the air flow in the same direction as the shaft of a fan blade, such as an electric fan, an air conditioner external fan, and when the axial flow anti-corrosion fan works, an impeller is driven by a motor to rotate in a cylindrical shell, air enters from a current collector, energy is obtained through the impeller, the pressure and the speed are improved, and then the air is discharged along the axial direction, the arrangement form of the axial flow fan comprises three types of vertical type, horizontal type and inclined type, the diameter of a small impeller is only about 100 mm, and the diameter of the large impeller can be more than 20 meters.
The anti-corrosion mode of the axial flow anti-corrosion fan is divided into a plurality of modes, the first surface treatment and the fan surface treatment are very important, dirt and rust layers on the surface of steel are removed by manual rust removal, the second base coat is used for the primer layer, the paint used for the primer layer is epoxy iron oxide red primer, the iron oxide red is a physical anti-rust pigment, the property is stable, the covering power is strong, the particles are fine, the anti-corrosion mode can play a good shielding role in a paint film, the anti-corrosion performance is good, the third surface coating is used for the top coat layer, the epoxy paint is chemically stable after being chemically cured, the coating is compact, and the adhesive force is very strong.
Even if the fan impeller is subjected to anti-corrosion treatment in the prior art, after the fan impeller is used for a period of time, the fan impeller is required to be integrally disassembled, the impeller of the fan is cleaned, and then the surface of the blade is further subjected to anti-corrosion treatment, but in the prior art, the whole disassembly and assembly of the axial flow fan are more troublesome, the shell of the axial flow fan is required to be separated from an external pipeline, and the axial flow fan can be taken out, so that the whole operation is more troublesome.
Disclosure of Invention
Based on the above, the invention aims to provide an anti-corrosion axial flow fan for conveying corrosive gas, so as to solve the technical problems that in the prior art, the whole assembly and disassembly of the axial flow fan are troublesome, the casing of the axial flow fan is required to be separated from an external pipeline, and the axial flow fan can be taken out, so that the whole operation is troublesome.
In order to achieve the above purpose, the present invention provides the following technical solutions: an anti-corrosion axial flow fan for conveying corrosive gas comprises a machine shell, wherein fixing frames are fixed at two ends of the interior of the machine shell, the fixing frames are movably connected with a fixing shaft, and an outer rotor motor is rotatably connected to the outer side of the fixing shaft;
an impeller ring is fixed on the outer side of the outer rotor motor, a plurality of groups of fixed blades are uniformly fixed on the outer side of the impeller ring, telescopic blades are slidably connected in each group of fixed blades, threaded grooves are formed in the two groups of fixed shafts, threaded rods matched with the threaded grooves are arranged in the two groups of threaded grooves, guide fixed rods penetrating to the outer side of a machine shell are fixed in the two groups of threaded rods, and a first opening plate and a second opening plate are respectively connected to the two sides of the top of the machine shell in a rotating mode;
the inside rotation of first division board is connected with the lock frame, and rotates through the pivot between lock frame and the first division board to be connected, pivot outside both ends all are fixed with the gear, the inside both ends of first division board all sliding connection have with gear engaged with rack, and the rack end runs through the direction dead lever and extends to the inside of second division board, and the inside through-hole with rack matched with that has been seted up of direction dead lever, the inside block groove that has seted up of lock frame, second division board top be fixed with block groove matched with block piece, the inside movable groove that matches with the lock frame that has been seted up of first division board, and the inside rubber sheet that is fixed with of movable groove.
Through adopting above-mentioned technical scheme, rotatory drive impeller ring and multiunit fixed blade, flexible blade carries out whole rotation through external rotor motor, under the effect of rotatory centrifugal force, every group flexible blade stretches out relative fixed blade, and fixed blade and flexible blade surface all pass through anticorrosive treatment, and then whole rotation can carry corrosive gas, when needs carry out whole dismantlement to the impeller, manual rotation lock frame, the lock frame rotates and opens, make the block groove break away from the spacing to the block piece, the pivot drives the gear rotation simultaneously, the gear drives the rack break away from the spacing to two sets of guide dead levers, thereby can open to both sides upset respectively to first opening plate and second opening plate, then rotate through the dead lever of two sets of direction, thereby make the screw groove in the fixed axle of external rotor motor and threaded rod each other separate, then the staff is with external rotor motor again, the fixed axle, the impeller ring, fixed blade and flexible blade whole upwards slide out, above-mentioned can be to the impeller whole dismouting maintenance, the blade surface after long-time use is again scribbled anticorrosive material under the circumstances that the casing is not dismantled with external pipeline, not only guaranteed the whole life of whole easy and fast, and fast operating efficiency has been improved.
The invention is further characterized in that a return spring is fixedly arranged between the fixed blade and the telescopic blade, and an elastic corrosion-resistant sheet positioned outside the return spring is fixedly arranged between the fixed blade and the telescopic blade.
Through adopting above-mentioned technical scheme, wherein reset spring when external rotor motor does not rotate, reset spring can drive the inside of flexible blade withdrawal fixed blade, makes impeller overall diameter diminish to be convenient for take out the impeller from the opening part of first opening plate and second opening plate.
The invention is further arranged that the shell is rotationally connected with the first opening and closing plate and the second opening and closing plate through the hinging seats, and the number of the hinging seats is two.
Through adopting above-mentioned technical scheme, wherein articulated seat is convenient for the rotation of first opening plate and second opening plate.
The invention is further arranged that the two ends of the inner part of the shell are both fixed with the supporting rods connected with the fixing frame, and the supporting rods are in an inclined state.
Through adopting above-mentioned technical scheme, wherein the bracing piece plays the fixed support effect to the mount, and then plays external rotor motor and holistic supporting role of impeller.
The invention further provides that handles are fixed on the outer sides of the first opening and closing plate and the second opening and closing plate, and anti-slip rings are fixed on the outer sides of the handles.
Through adopting above-mentioned technical scheme, wherein the staff of being convenient for opens first opening and shutting board and second opening and shutting board.
In summary, the invention has the following advantages: according to the invention, the impeller ring, the plurality of groups of fixed blades and the telescopic blades are driven to integrally rotate through the rotation of the outer rotor motor, the telescopic blades of each group extend out relative to the fixed blades under the action of rotation centrifugal force, and the surfaces of the fixed blades and the telescopic blades are subjected to corrosion prevention treatment, so that corrosive gas can be conveyed through the integral rotation.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an enlarged schematic view of the impeller of the present invention;
FIG. 3 is an enlarged schematic view of a vane according to the present invention;
FIG. 4 is an enlarged exploded view of a partial structure of the present invention;
FIG. 5 is an enlarged view of the invention at A of FIG. 4;
fig. 6 is an enlarged view of fig. 4 at B in accordance with the present invention.
In the figure: 1. a housing; 2. a fixing frame; 3. an outer rotor motor; 4. a fixed shaft; 5. an impeller ring; 6. a fixed blade; 7. a telescoping blade; 8. a return spring; 9. a thread groove; 10. a guide fixing rod; 11. a threaded rod; 12. a first opening plate; 13. a second opening plate; 14. a hinge base; 15. a locking frame; 16. a rotating shaft; 17. a gear; 18. a rack; 19. a clamping groove; 20. a clamping block; 21. a movable groove; 22. a support rod; 23. a handle.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
Hereinafter, an embodiment of the present invention will be described in accordance with its entire structure.
An anti-corrosion axial flow fan for conveying corrosive gas is shown in fig. 1-6, and comprises a machine shell 1, wherein fixing frames 2 are fixed at two ends inside the machine shell 1, the fixing frames 2 are movably connected with a fixing shaft 4, and an outer rotor motor 3 is rotatably connected with the outer side of the fixing shaft 4;
the outer side of the outer rotor motor 3 is fixedly provided with an impeller ring 5, the outer side of the impeller ring 5 is uniformly fixedly provided with a plurality of groups of fixed blades 6, the inside of each group of fixed blades 6 is slidably connected with a telescopic blade 7, the inside of each group of fixed shafts 4 is provided with a threaded groove 9, the inside of each group of threaded grooves 9 is provided with a threaded rod 11 matched with each threaded groove, the inside of each group of threaded rods 11 is fixedly provided with a guide fixed rod 10 penetrating to the outer side of the casing 1, and the two sides of the top of the casing 1 are respectively connected with a first opening plate 12 and a second opening plate 13 in a rotating way;
the inside of the first opening and closing plate 12 is rotationally connected with a locking frame 15, the locking frame 15 is rotationally connected with the first opening and closing plate 12 through a rotating shaft 16, gears 17 are fixed at two ends of the outer side of the rotating shaft 16, racks 18 meshed with the gears 17 are slidingly connected at two ends of the inside of the first opening and closing plate 12, the tail ends of the racks 18 penetrate through the guide fixing rod 10 and extend to the inside of the second opening and closing plate 13, through holes matched with the racks 18 are formed in the guide fixing rod 10, clamping grooves 19 are formed in the locking frame 15, clamping blocks 20 matched with the clamping grooves 19 are fixed at the top of the second opening and closing plate 13, movable grooves 21 matched with the locking frame 15 are formed in the inside of the first opening and closing plate 12, rubber sheets are fixed in the movable grooves 21, when an impeller is required to be integrally dismounted, the locking frame 15 is manually rotated, the locking frame 15 is rotationally opened, the clamping grooves 19 are separated from limiting the clamping blocks 20, meanwhile, the rotating shaft 16 drives the gears 17 to rotate, the racks 18 are separated from limiting the two groups of guide fixing rods 10, so that the first opening and closing plate 12 and the second opening and closing plate 13 are respectively turned over to the two groups of outer rotor shafts 4, 3 and the outer rotor 4 are respectively, and the two groups of the outer rotor 4 are separated from each other through the two groups of rotating shafts 3 and the fixed shafts 4 and the two groups of the outer rotor 4 and the outer rotor 4 are separated, and the two groups of the rotating shafts are separated from each other, and the 3 are then rotated and the 3 and the two 3 and the outer rotor 4 are separated;
above-mentioned can know, under the condition that casing 1 is not dismantled with external pipeline, can wholly carry out dismouting maintenance to the impeller, carry out again to the blade surface after long-time use and scribble anticorrosive material, guaranteed holistic life, whole dismouting is more convenient moreover, has effectually improved holistic work efficiency.
Referring to fig. 3, a return spring 8 is fixedly arranged between a fixed blade 6 and a telescopic blade 7, and an elastic corrosion-resistant sheet positioned outside the return spring 8 is fixed between the fixed blade 6 and the telescopic blade 7.
Referring to fig. 4, the casing 1 is rotatably connected with the first opening board 12 and the second opening board 13 through hinge bases 14, and the number of the hinge bases 14 is two, so that the hinge bases 14 facilitate the rotation of the first opening board 12 and the second opening board 13.
Referring to fig. 1, two ends of the inside of a casing 1 are fixed with support rods 22 connected with a fixing frame 2, and the support rods 22 are inclined.
Referring to fig. 1 and 4, the outer sides of the first opening plate 12 and the second opening plate 13 are fixed with the handles 23, and the outer sides of the handles 23 are fixed with the anti-slip ring.
The working principle of the invention is as follows: when the impeller is used, a power supply is connected, the shell 1 is in sealing connection with an external pipeline through a plurality of sets of accessories such as bolts, sealing rings and the like, and then corrosive gas can be conveyed under the action of the impeller, and the impeller is composed of an impeller ring 5, a plurality of sets of fixed blades 6 and a plurality of sets of telescopic blades 7;
the outer rotor motor 3 rotates to drive the impeller ring 5, the plurality of groups of fixed blades 6 and the telescopic blades 7 to integrally rotate, each group of telescopic blades 7 extends out relative to the fixed blades 6 under the action of rotation centrifugal force, and the surfaces of the fixed blades 6 and the telescopic blades 7 are subjected to corrosion prevention treatment, so that corrosive gas can be conveyed through the integral rotation;
when the impeller needs to be integrally disassembled, the locking frame 15 is manually rotated, the locking frame 15 is rotated and opened, the clamping groove 19 is separated from the limit of the clamping block 20, meanwhile, the rotating shaft 16 drives the gear 17 to rotate, the gear 17 drives the rack 18 to be separated from the limit of the two groups of guide fixing rods 10, so that the first opening plate 12 and the second opening plate 13 can be respectively turned and opened to two sides, then the two groups of guide fixing rods 10 are rotated, the thread groove 9 and the threaded rod 11 in the fixed shaft 4 of the outer rotor motor 3 are mutually separated, and then the worker slides out the outer rotor motor 3, the fixed shaft 4, the impeller ring 5, the fixed blades 6 and the telescopic blades 7 integrally;
according to the above, the impeller can be integrally disassembled, assembled and maintained under the condition that the shell 1 is not disassembled from an external pipeline, and the surface of the blade after long-time use is coated with the anti-corrosion material again, so that the whole service life is ensured, the whole assembly and disassembly are more convenient, and the whole working efficiency is effectively improved;
further, after the maintenance of the whole impeller is completed, the structures such as the impeller and the like fall to the lowest end along the guiding fixing rod 10 through the thread groove in the fixing shaft 4, and then the guiding fixing rod 10 is rotated to enable the threaded rod 11 to be screwed into the thread groove 9 of the fixing shaft 4, so that the whole impeller is limited;
then to first opening and closing plate 12 and second opening and closing plate 13 upset closure, rotate locking frame 15 this moment, drive two sets of racks 18 simultaneously and run through two sets of direction dead levers 10 and extend to the inside of second opening and closing plate 13, and then make rack 18 carry out fixed spacing to direction dead lever 10, and make and connect steadily between first opening and closing plate 12 and the second opening and closing plate 13, and the block 20 mutual block spacing at the block groove 19 and the second opening and closing plate 13 top of locking frame 15 this moment, and then improved the connection stability between first opening and closing plate 12 and the second opening and closing plate 13, and guaranteed the leakproofness between first opening and closing plate 12 and the second opening and closing plate 13 simultaneously.
Although embodiments of the invention have been shown and described, the detailed description is to be construed as exemplary only and is not limiting of the invention as the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples, and modifications, substitutions, variations, etc. may be made in the embodiments as desired by those skilled in the art without departing from the principles and spirit of the invention, provided that such modifications are within the scope of the appended claims.

Claims (6)

1. The utility model provides an anticorrosive axial fan that carries to corrosive gas, includes casing (1), its characterized in that: fixing frames (2) are fixed at two ends inside the shell (1), the fixing frames (2) are movably connected with fixing shafts (4), and outer rotor motors (3) are rotatably connected to the outer sides of the fixing shafts (4);
an impeller ring (5) is fixed on the outer side of the outer rotor motor (3), a plurality of groups of fixed blades (6) are uniformly fixed on the outer side of the impeller ring (5), telescopic blades (7) are slidably connected in each group of fixed blades (6), threaded grooves (9) are formed in the two groups of fixed shafts (4), threaded rods (11) matched with the threaded grooves are arranged in the two groups of threaded grooves (9), guide fixed rods (10) penetrating to the outer side of the casing (1) are fixed in the two groups of threaded rods (11), and a first opening plate (12) and a second opening plate (13) are respectively connected to two sides of the top of the casing (1) in a rotating mode;
the novel sliding type locking device is characterized in that a locking frame (15) is connected to the inside of the first opening and closing plate (12) in a rotating mode, the locking frame (15) and the first opening and closing plate (12) are connected in a rotating mode through a rotating shaft (16), gears (17) are fixed to two ends of the outer side of the rotating shaft (16), racks (18) meshed with the gears (17) are connected to two ends of the inside of the first opening and closing plate (12) in a sliding mode, the tail ends of the racks (18) penetrate through a guide fixing rod (10) and extend to the inside of the second opening and closing plate (13), through holes matched with the racks (18) are formed in the guide fixing rod (10), clamping grooves (19) are formed in the locking frame (15), and clamping blocks (20) matched with the clamping grooves (19) are fixed to the top of the second opening and closing plate (13).
2. The anti-corrosion axial flow fan for transporting corrosive gas according to claim 1, wherein: a reset spring (8) is fixedly arranged between the fixed blade (6) and the telescopic blade (7), and an elastic corrosion-resistant sheet positioned outside the reset spring (8) is fixed between the fixed blade (6) and the telescopic blade (7).
3. The anti-corrosion axial flow fan for transporting corrosive gas according to claim 1, wherein: the machine shell (1) is rotationally connected with the first opening and closing plate (12) and the second opening and closing plate (13) through hinge seats (14), and the number of the hinge seats (14) is two.
4. The anti-corrosion axial flow fan for transporting corrosive gas according to claim 1, wherein: the first opening plate (12) is internally provided with a movable groove (21) matched with the locking frame (15), and a rubber sheet is fixed in the movable groove (21).
5. The anti-corrosion axial flow fan for transporting corrosive gas according to claim 1, wherein: the two ends of the interior of the shell (1) are both fixed with supporting rods (22) connected with the fixing frame (2), and the supporting rods (22) are in an inclined state.
6. The anti-corrosion axial flow fan for transporting corrosive gas according to claim 1, wherein: the outer sides of the first opening plate (12) and the second opening plate (13) are both fixed with handles (23), and anti-slip rings are fixed on the outer sides of the handles (23).
CN202311105890.8A 2023-08-30 2023-08-30 Corrosion-resistant axial flow fan for conveying corrosive gas Active CN116906372B (en)

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Application Number Priority Date Filing Date Title
CN202311105890.8A CN116906372B (en) 2023-08-30 2023-08-30 Corrosion-resistant axial flow fan for conveying corrosive gas

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Application Number Priority Date Filing Date Title
CN202311105890.8A CN116906372B (en) 2023-08-30 2023-08-30 Corrosion-resistant axial flow fan for conveying corrosive gas

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CN116906372B true CN116906372B (en) 2024-01-23

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117798343B (en) * 2024-03-01 2024-05-14 成都新航工业科技股份有限公司 Closed impeller shell forming die

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1737158A1 (en) * 1990-01-02 1992-05-30 Ново-Бакинский Нефтеперерабатывающий Завод Им.Владимира Ильича Device for assembling and disassembling of large-sized centrifugal pump impeller on shaft
KR101841582B1 (en) * 2017-06-15 2018-03-23 김도상 A device for separating the impeller of a horizontal pump
CN108457910A (en) * 2018-03-07 2018-08-28 湖北嘉辐达节能科技有限公司 A kind of centrifugal blower being conveniently replaceable flabellum
DE202019003521U1 (en) * 2019-08-26 2019-11-11 KSB SE & Co. KGaA Assembly device for a pump impeller and disassembly device for a pump impeller
CN212744473U (en) * 2020-07-22 2021-03-19 青岛永逢润钛风机制造有限公司 Corrosion-resistant centrifugal fan impeller
CN215719803U (en) * 2021-08-18 2022-02-01 河北旺轩通风设备制造有限公司 Novel fan that can trade and install fast

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1737158A1 (en) * 1990-01-02 1992-05-30 Ново-Бакинский Нефтеперерабатывающий Завод Им.Владимира Ильича Device for assembling and disassembling of large-sized centrifugal pump impeller on shaft
KR101841582B1 (en) * 2017-06-15 2018-03-23 김도상 A device for separating the impeller of a horizontal pump
CN108457910A (en) * 2018-03-07 2018-08-28 湖北嘉辐达节能科技有限公司 A kind of centrifugal blower being conveniently replaceable flabellum
DE202019003521U1 (en) * 2019-08-26 2019-11-11 KSB SE & Co. KGaA Assembly device for a pump impeller and disassembly device for a pump impeller
CN212744473U (en) * 2020-07-22 2021-03-19 青岛永逢润钛风机制造有限公司 Corrosion-resistant centrifugal fan impeller
CN215719803U (en) * 2021-08-18 2022-02-01 河北旺轩通风设备制造有限公司 Novel fan that can trade and install fast

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