CN111972346A

CN111972346A - Impeller type aerator

Info

Publication number: CN111972346A
Application number: CN202010247308.1A
Authority: CN
Inventors: 吴为国
Original assignee: Zhejiang Fudi Machinery Co ltd
Current assignee: Zhejiang Fudi Machinery Co ltd
Priority date: 2019-05-21
Filing date: 2020-03-31
Publication date: 2020-11-24
Anticipated expiration: 2040-03-31
Also published as: CN111972346B

Abstract

The invention relates to an impeller type aerator which is not provided with a speed reducing mechanism and has a simple structure; the outer rotor permanent magnet brushless motor mainly comprises a stator and a rotor; the stator is provided with a fixed shaft, the fixed shaft is provided with a hole for leading out wires of the motor stator coils to pass through, the leading out wires of the motor stator coils are led out from the upper end of the fixed shaft after being sealed and enter a sealing box in the supporting seat, and output wires of the controller also enter the sealing box in the supporting seat and are connected with the leading out wires of the motor stator coils; the rotor mainly comprises an upper end cover, a magnetic steel fixing ring and a shell, the rotor mainly structurally comprises a rotating body which is formed by drawing a low-carbon steel plate and is provided with a flange, magnetic steel is arranged on the inner wall of the magnetic steel fixing ring, a hole connected with the upper end cover is formed in the flange, and the flange is connected with the upper end cover in a sealing mode. The impeller type aerator with the structure reducing the single provided by the invention does not need a speed reducing mechanism, improves the efficiency, has a simple structure, is reliable in sealing, and can be provided with a speed regulating function. The motor works on the water surface and is cooled by water spray with good performance.

Description

Impeller type aerator

Technical Field

The invention belongs to aquaculture equipment, and particularly relates to an impeller type aerator.

Background

The conventional impeller type oxygen increasing machine is provided with a speed reducing mechanism, has a complex structure, and has small diameter of an impeller without the speed reducing mechanism, thereby influencing the efficiency.

Disclosure of Invention

The invention aims to provide an impeller type aerator which is directly driven by a permanent magnet motor without a speed reducing mechanism and has a simple structure, or an impeller type aerator which is suitable for mariculture and has a simple structure, and also discloses a waterproof and anticorrosion structure of the motor.

The drawing, also called drawing, drawing and calendering, is a method for making a metal sheet blank into an open hollow part by using a die. The "rotating body" is also called "cylindrical member" and is a circular open hollow member. The magnetic steel described herein is also known as a permanent magnet.

The purpose of the invention is realized as follows:

an impeller type aerator mainly comprises an outer rotor permanent magnet brushless motor (hereinafter referred to as a motor), a controller, an impeller, a supporting seat, a supporting rod and a floating body, wherein the motor mainly comprises a stator and a rotor; the stator is provided with a fixed shaft, the fixed shaft is provided with a hole for leading out wires of the motor stator coils to pass through, the leading out wires of the motor stator coils are led out from the upper end of the fixed shaft after being sealed and enter a sealing box in the supporting seat, and output wires of the controller also enter the sealing box in the supporting seat and are connected with the leading out wires of the motor stator coils; the impeller is connected below the motor, the supporting seat is arranged above the motor, the controller is arranged above the supporting seat, one end of the supporting rod is connected to the supporting seat, the other end of the supporting rod is connected with the floating body, the whole machine floats on the water surface by the floating body, and the motor drives the impeller to rotate to increase oxygen during working. The sealing box in the supporting seat can be provided with a box body and a box cover, the box body and the supporting seat can be molded into a whole by injection, a wiring terminal can be arranged in the box body, the box cover can be provided with two sealing ports, and the output line of the controller and the outgoing line of the stator coil of the motor respectively enter the sealing box from the sealing ports and are connected by the wiring terminal. The two sealing ports on the box cover comprise a plurality of plastic sheets and external threads which are circumferentially distributed, elastic bodies are arranged in the circumferentially distributed plastic sheets, and inner conical nuts matched with the external threads can be screwed down to enable the plastic sheets to bend towards the center to extrude the elastic bodies so that the elastic bodies are tightly combined with the cables to seal the sealing ports. The plastic sheets of the two sealing openings on the box cover can be arranged with the box cover into a whole to be formed by injection molding. The box cover and the box body can be tightly sealed and fastened by a sealing gasket and a screw.

An impeller type aerator mainly comprises an outer rotor permanent magnet brushless motor, an impeller and a floating body, wherein the outer rotor permanent magnet brushless motor comprises a stator, a fixed shaft and a rotor; the rotor mainly comprises an upper end cover, a magnetic steel fixing ring and a shell, and the structure of the rotor comprises one of the following components:

the rotor shell comprises a rotator which is formed by drawing a low-carbon steel plate and is provided with a flange, the straight wall of the rotator is a magnetic steel fixing ring, magnetic steel is arranged on the inner wall of the magnetic steel fixing ring, a hole connected with the upper end cover is formed in the flange, and the flange is connected with the upper end cover in a sealing manner;

the shell of the rotor is a shell with corrosion resistance, a magnetic steel fixing ring is arranged in the shell with corrosion resistance, magnetic steel is arranged on the inner wall of the magnetic steel fixing ring, and the upper end cover is connected with the shell with corrosion resistance in a sealing mode;

the rotor shell comprises an upper shell and a lower shell, the magnetic steel fixing ring is fixedly connected with the upper end cover, or the magnetic steel fixing ring and the upper end cover are arranged into a whole, and magnetic steel is arranged on the inner wall of the magnetic steel fixing ring; the upper shell and the lower shell are made of anticorrosive materials and are connected in a sealing way;

fourthly, the rotor comprises an upper end cover connected with the magnetic steel fixing ring through a fastener, a lower end cover connected with or welded with the magnetic steel fixing ring through a fastener, and magnetic steel is arranged on the inner wall of the magnetic steel fixing ring; the upper shell and the lower shell are made of anticorrosive materials and are connected in a sealing way;

the upper end cover of any one of the four types is internally provided with a bearing chamber, the upper part of the rotor is provided with an extension port of a fixed shaft, the extension port is provided with a sealing device, the fixed shaft is connected with a supporting seat, the whole machine floats on the water surface by virtue of a floating body, and the rotor drives the impeller to rotate together to increase oxygen when the machine works; the anti-corrosion material comprises plastic and stainless steel.

The shell with the corrosion resistance comprises a stainless steel rotary body with a flange formed by drawing; the upper shell and the lower shell made of the anticorrosive material comprise a stainless steel deep-drawing formed rotating body; the fixed shaft is connected with two bearings, and a neutral gear is arranged between the two bearings; the bearings are all arranged in the bearing chamber of the upper end cover, and the stator is arranged at the lower end of the fixed shaft; or one of the bearings is arranged in the bearing chamber at the bottom, and the stator is arranged on a neutral position between the two bearings.

The upper end of a fixed shaft of the outer rotor permanent magnet brushless motor extends out of the outer rotor, a sealing device is arranged between the outer rotor and the fixed shaft, a leading-out wire of a stator coil of the motor is led out from an inner hole of the fixed shaft and is connected with a controller, and the controller is arranged on the top of the supporting seat.

The middle part of the supporting seat is provided with a hole passing through a fixed shaft of the outer rotor permanent magnet brushless motor; the support base is provided with three mounting grooves for the support rods, and the positions of the three mounting grooves are respectively deviated from the center of the aerator; the controller shell is in a cover shape with a flange formed by drawing stainless steel, a mounting hole for fixing the support rod is arranged at the flange, a bolt penetrates through the mounting hole of the flange of the cover to be fastened with the support seat and the support rod, and the cover with the flange covers the upper part of the support seat.

The supporting seat is made of metal or plastic, and a fixed shaft connecting hole and an anti-rotation mechanism for connecting the outer rotor permanent magnet brushless motor are arranged in the supporting seat; the anti-rotation mechanism comprises a gasket which is arranged in the supporting seat and is prevented from rotating, the gasket comprises a gasket with a non-circular shape, and an inner hole of the gasket is matched with a key on the fixed shaft or an anti-rotation position which is locally flat.

The sealing device arranged on the upper part of the upper shell and the extending port of the fixed shaft comprises a static seal arranged at the combination position of the upper shell and the upper part of the bearing chamber shell; the upper section of the fixed shaft extending out of the bearing is provided with a dynamic seal, and the dynamic seal comprises a framework oil seal or a mechanical seal.

The impeller comprises a circular impeller or a conical impeller, the circular impeller comprises a circular ring body and blades, a connecting position and a plurality of connecting holes which are connected with a rotor of the outer rotor permanent magnet brushless motor are arranged on the circular ring body, and the blades are arranged on the outer side of the circular ring body; or the impeller is a conical impeller and comprises a conical body, blades and a fixed seat, the upper end of the conical body is large, the lower end of the conical body is small, the fixed seat is arranged in the conical body, a connecting hole matched with the rotor is formed in the fixed seat, a plurality of blades are arranged on the outer side of the conical body, and the blades and the conical body are combined in an inclined mode.

The upper shell and the lower shell of the rotor of the outer rotor permanent magnet brushless motor are rotating bodies with flanges, the rotating bodies are matched with the excircle of the magnetic steel fixing ring, and a sealing ring is arranged in a gap between the transition circular arc of the flanges of the upper shell and the lower shell and the straight wall and the excircle of the magnetic steel fixing ring; or the upper opening of the rotator with the flange on the shell of the rotor is provided with a drawn arc surface, and the sealing ring is arranged in a space formed by the arc surface and the spigot of the upper end cover.

The outer rotor magnetic steel fixing ring of the outer rotor permanent magnet brushless motor is a rotating body which is formed by drawing a low-carbon steel plate and is integrated with the upper end cover, the shell of the bearing chamber is connected with the rotating body to form an outer rotor assembly of the permanent magnet brushless motor, the opening part of the rotating body is downward, the straight wall of the rotating body is a magnetic steel fixing ring, and magnetic steel is arranged in the magnetic steel fixing ring.

The combination of the magnetic steel fixing ring, the upper end cover and the bearing chamber shell is manufactured by one of the following methods:

the upper end cover is formed by casting, the magnetic steel fixing ring is made of low-carbon steel, and the magnetic steel fixing ring are connected by threads or fasteners;

the upper end cover and the magnetic steel fixing ring are a rotating body formed by drawing low-carbon steel plates, a bearing chamber outer shell is provided with a flange or a step, and the bearing chamber outer shell and the rotating body are fastened by bolts;

and the upper end cover and the magnetic steel fixing ring are rotating bodies formed by drawing low-carbon steel plates, the outer shell of the bearing chamber is formed by sawing and cutting seamless tubes, the bearing chamber and the rotating bodies are welded together, and the welded bearing chamber and the rotating bodies are cut to required sizes.

Compared with the prior art, the invention has the outstanding advantages that:

the impeller type aerator with the structure simple reduction provided by the invention does not need a speed reducing mechanism, is directly driven by the permanent magnet motor, improves the efficiency, has a simple structure, also discloses a waterproof and anti-corrosion structure of the motor, is reliable in sealing, and can be provided with a speed regulating function; the motor is partially immersed in water or is cooled by water when working on the water surface; also discloses an anti-corrosion impeller type aerator for sewage collection and seawater culture and a manufacturing method of the aerator.

Drawings

FIG. 1 is a schematic perspective view of the aerator of the present invention with a three-float, annular impeller; (in this figure, the impeller rotates anticlockwise, the rising spray is reflected to the motor by the rectangular support rod extending clockwise to cool the motor)

FIG. 2 is a schematic perspective view of the oxygen increasing machine with three floating bodies and a conical impeller of the invention;

FIG. 3 is a schematic perspective view of the square float aerator of the present invention;

FIG. 4 is an assembly diagram of the outer rotor permanent magnet brushless motor, the supporting seat and the controller according to the present invention; (bearings are arranged in the upper end cover and the lower end cover)

FIG. 5 is an assembly diagram of the outer rotor permanent magnet brushless motor, the supporting seat and the controller according to the present invention; (the upper end cover is connected with the bearing chamber shell fastener, the upper shell and the lower shell are arranged at the periphery of the magnetic steel fixed ring, the upper end cover and the bearing chamber shell)

FIG. 6 is an assembly diagram of the outer rotor permanent magnet brushless motor, the supporting seat and the controller according to the present invention; (the upper end cap is connected with the magnetic steel fixed ring by screw thread, the upper shell and the lower shell are arranged at the periphery of the magnetic steel fixed ring, the upper end cap and the bearing chamber shell)

Fig. 7 is a schematic structural diagram of an outer rotor permanent magnet brushless motor of the present invention; (the upper end cover, the magnetic steel fixing ring and the lower end cover are connected by bolts, and the upper shell and the lower shell are arranged on the periphery of the upper end cover, the magnetic steel fixing ring and the lower end cover)

Fig. 8 is a schematic structural diagram of an outer rotor permanent magnet brushless motor of the present invention; (lower bearing chamber welding)

Fig. 9 is a schematic structural diagram of an outer rotor permanent magnet brushless motor of the present invention; (Upper end cap with two bearings)

Fig. 10 is a schematic structural view of an outer rotor permanent magnet brushless motor of the present invention; (stainless steel casing built-in magnet steel fixed ring)

Fig. 11 is a perspective view of an outer rotor permanent magnet brushless motor according to the present invention;

FIG. 12 is a perspective view of the lid of the present invention with two sealing ports;

FIG. 13 is a schematic view of the sealing box base, the lead-out wire of the stator coil of the motor, the output wire of the controller and the wiring terminal of the present invention; (section view of seal box)

FIG. 14 illustrates the magnetic steel retainer ring and the lower end cap of the present invention formed by drawing steel plates; (lower bearing chamber welding)

FIG. 15 shows the magnetic steel fixing ring of the present invention with screw threads;

FIG. 16 is a perspective view of the upper housing of the present invention;

FIG. 17 is a perspective view of the lower housing of the present invention;

FIG. 18 shows the magnetic steel fixing ring and the upper end cap of the present invention formed by drawing steel plates; (with vent)

FIG. 19 is a schematic view of the fastening structure for the magnetic steel fixing ring, the upper end cover and the bearing housing of the present invention;

FIG. 20 is a schematic view of a magnetic steel retaining ring, an upper end cap, and a bearing housing of the present invention with a welded connection structure;

FIG. 21 is a schematic perspective view of the upper end cap and bearing housing of the present invention;

FIG. 22 is a schematic view of the threaded connection structure of the upper end cover and the magnetic steel fixing ring of the present invention;

FIG. 23 is a schematic sectional view of a blade of a circular ring impeller of the present invention;

FIG. 24 is a perspective view of a shim according to the present invention;

FIG. 25 is a perspective view of the backup pad of the present invention;

FIG. 26 is a perspective view of the backup pad of the present invention;

FIG. 27 is a perspective view of the annular impeller of the present invention;

FIG. 28 is a perspective view of the annular impeller of the present invention;

FIG. 29 is a schematic perspective view of a conical impeller of the present invention;

fig. 30 is a schematic view of an assembly structure of an impeller and an outer rotor permanent magnet brushless motor according to the present invention; (Motor section view)

Fig. 31 is a schematic view of an assembly structure of an impeller and an outer rotor permanent magnet brushless motor according to the present invention;

FIG. 32 is a perspective view of the float bracket of the present invention; (the installation position of the support bar is a semicircle)

FIG. 33 is a perspective view of the float bracket of the present invention; (mounting position of the support bar is square)

FIG. 34 is a perspective view of the float carrier of the present invention; (mounting position of the support bar is circular)

FIG. 35 is a perspective view of the float bracket of the present invention;

FIG. 36 is a perspective view of the float bracket of the present invention; (there are two sets of holes connected to the support bar)

FIG. 37 is a cross-sectional view of the hollow housing and bracket of the present invention;

FIG. 38 is a cross-sectional view of the hollow shell and bolt of the present invention;

FIG. 39 is a perspective view of the square float of the present invention attached to a support rod; (the support bar is a square tube)

FIG. 40 is a perspective view of the circular float of the present invention attached to a support rod; (the support bar is a round tube)

FIG. 41 is a perspective view of the hollow shell and bolt of the present invention formed in one piece;

FIG. 42 is a perspective view of the square float of the present invention;

fig. 43 is a perspective view of the controller and junction box of the present invention.

In the figure, 1-an outer rotor permanent magnet brushless motor; 2-a reflector plate; 3-a circular impeller; 4-a support bar; 5-a hollow shell; 6-a bracket; 7-a bottom plate; 8-mounting position of the support rod; 9-a flange; 10-holes connected to the top of the hollow shell; 11-two side plates; 12-an outer annular ring; 13-a blade; 14-an upper blade section; 15-lower blade section; 16-passing through a water tank; 17-water through holes; 18-inner annular ring; 19-a reflector plate; 20-reinforcing strips; 21-upper end cap; 22-a magnetic steel fixing ring; 23-lower end cap; 24-magnetic steel; 25-a stator; 26-a fixed shaft; 27-holes for lead-out wires; 28-flat; 29-threads; 30-framework oil seal; a 31-O type seal ring; 32-screw holes for connecting the impellers; 33-bolts; 34-a connecting plate; 35-a support base; 36-a controller; 37-a junction box; a 38-square shim; 39-a flange; 40-terminal box base; 41-junction box cover; 42-a connecting terminal; 43-a power line; 44-bottom plane; 45-a support plate; 46-well; 47-an anchor; 48-outlet line; 49-square window; 50-mounting grooves; 51-connection hole; 52-a through hole; 53-bearing chamber; 54-a groove; 55-a flange; 56-hole; 57-studs connecting the impellers; 58-bolt; 59-an upper housing; 60-a lower housing; a 61-O type seal ring; 62-bolt; 63-connecting holes; 64-a nut; 65-bolt; 66-a through hole; 67-square float; 68-a diffusion port; 69-cylindrical shape; 70-groove; 71-screw holes; 72-positioning holes; 73-a handle; 74-O-ring; a 75-O-shaped seal ring; 76-stainless steel housing; 77-screw thread; 78-a flange; 79-threads; 80-reinforcing ribs; 81-fasteners; 82-a window; 83-holes; 84-a conical impeller; 85-upper and lower housing attachment holes; 86-a transition plate; 87-hole to connect impeller; 88-waterproof ring; 89-a retainer ring; 90-seam allowance; 91-screw holes; 92-injection molding; 93-a protective shell; 94-a cone; 95-leaf; 96-a fixed seat; 97-connecting hole; 98-water retaining filter screen; 99-water beating plate; 100-bearing housing shell; 101-a flange; 102-positioning post mating holes; 103-reinforcing plates; 104-mounting holes; 105-bearing seat connection hole; 106-bolt; 107-working plane C; 108-working surface A; 109-well; 110-a bearing; 111-cover; 112-positioning columns; 113-sealing chamber seam allowance; 114-O-ring seals; 115-O-ring seals; 116-upper nut; 117-lower nut; 118-a pocket; 119-bolt; 120-a cartridge; 121-box cover; 122-a connection terminal; 123-output line of controller; 124-plastic sheet; 125-external threads; 126-an elastomer; 127-an inner tapered nut; 128-a seal gasket; 129-screw; 130-water leakage holes; 131-sealing assembly.

Detailed Description

The invention is further described in the following with specific embodiments in conjunction with the accompanying drawings, see fig. 1-43:

an impeller type aerator embodiment mainly comprises an outer rotor permanent magnet brushless motor, a controller 36, an impeller, a supporting seat 35, a supporting rod 4 and a floating body; the outer rotor permanent magnet brushless motor mainly comprises a stator 25 and a rotor; the stator is provided with a fixed shaft 26, the fixed shaft 26 is provided with a hole 27 for leading wires of the motor stator coils to pass through, the leading wires 48 of the motor stator coils enter the sealing box in the supporting seat 35 after being sealed from the upper end of the fixed shaft 26, and the output wires 123 of the controller also enter the sealing box in the supporting seat 35 to be connected with the leading wires 48 of the motor stator coils; the impeller is connected below the motor, the supporting seat 35 is arranged above the motor, the controller 36 is arranged above the supporting seat 35, one end of the supporting rod 4 is connected to the supporting seat 35, the other end of the supporting rod 4 is connected with the floating body, the whole machine floats on the water surface by the floating body, and the motor drives the impeller to rotate to increase oxygen during working.

The sealing box in the supporting seat 35 can be provided with a box body 120 and a box cover 121, the box body 120 and the supporting seat 35 can be molded into a whole or formed in a split mode, a connecting terminal 122 can be arranged in the sealing box, the box cover 121 can be provided with two sealing ports, an output line 123 of the controller and an outgoing line 48 of a stator coil of the motor can be multi-core cables, the cables can enter the sealing box from the sealing ports and can be connected through the connecting terminal 122, and the connecting terminal 122 can be arranged on the inner side of the box cover 121. The sealing port of the box cover 121 can be provided with a sealing component 131, the sealing component 131 comprises a plurality of plastic sheets 124 and external threads 125 which are circumferentially distributed, elastic bodies 126 are arranged in the plastic sheets 124 which are circumferentially distributed, and an inner conical nut 127 matched with the external threads is screwed down, so that the plastic sheets 124 bend towards the center to extrude the elastic bodies 126 to enable the elastic bodies 126 to be tightly combined with the cables to seal the sealing port. The plastic sheets 124 and the external threads 125 of the two sealing openings on the box cover 121 can be integrated with the box cover 121 by injection molding or can be assembled after being formed separately. The cover 121 and the body 120 can be tightly fixed by a gasket 128 and a screw 129. The bottom of the supporting seat 35 can be provided with water leakage holes 130, and the water leakage holes 130 can timely discharge water flowers and water mist which may enter the supporting seat 35 and are condensed into a water body.

An impeller type aerator embodiment mainly comprises an outer rotor permanent magnet brushless motor 1, an impeller and a floating body, wherein the outer rotor permanent magnet brushless motor mainly comprises a stator 25, a fixed shaft 26 and a rotor; the rotor comprises one of the following structures:

the rotor mainly comprises an upper end cover 21, a magnetic steel fixing ring 22 and a lower end cover 23, wherein the magnetic steel fixing ring 22 and the lower end cover 23 can be a rotator which is formed by drawing a low-carbon steel plate and is provided with a flange 55, a straight wall of the rotator is the magnetic steel fixing ring 22, magnetic steel 24 is arranged on the inner wall of the magnetic steel fixing ring 22, an opening of the rotator faces upwards, a hole 56 connected with the upper end cover is formed in the flange 55, and the flange 55 is in sealing connection with the upper end cover 21. The magnetic steel mounting positions of the plane of the flange 55 and the inner wall of the magnetic steel fixing ring 22 can be finely turned to improve the precision.

The rotor mainly comprises an upper end cover 21, a magnetic steel fixing ring 22 and a shell, wherein the shell is made of an anticorrosive material, the anticorrosive material is preferably a rotating body which is formed by drawing a stainless steel plate and is provided with a flange, the opening of the rotating body is upward to form the stainless steel shell 76, the magnetic steel fixing ring 22 is arranged on the inner wall of the stainless steel shell 76, magnetic steel 24 is arranged on the inner wall of the magnetic steel fixing ring 22, and the upper end cover 21 is connected with the flange of the stainless steel shell in a sealing manner; the straight wall of the stainless steel shell can be designed into a step shape, and the step shape straight wall enables the magnetic steel fixing ring 22 to be axially positioned. The magnetic steel fixing ring 22 can be made of a magnetic conductive material.

And thirdly, the rotor mainly comprises an upper end cover 21, a magnetic steel fixing ring 22 and a shell, the shell comprises an upper shell 59 and a lower shell 60, the magnetic steel fixing ring 22 is fixedly connected with the upper end cover 21, or the magnetic steel fixing ring 22 and the upper end cover 21 are arranged into a whole. The upper shell 59 and the lower shell 60 are made of anticorrosive materials, the anticorrosive materials are preferably rotating bodies which are formed by drawing the upper shell 59 and the lower shell 60 by stainless steel plates and are provided with flanges 78, and the sealing connection position of the upper shell 59 and the lower shell 60 is arranged at the periphery of the upper end cover 21 and the magnetic steel fixing ring 22; or the upper shell and the lower shell are a rotating body formed by drawing stainless steel plates, and the upper shell and the lower shell can be welded and sealed.

And fourthly, the rotor mainly comprises an upper end cover 21, a magnetic steel fixing ring 22, a lower end cover 23 and a shell, the upper end cover 21 and the lower end cover 23 are connected with the magnetic steel fixing ring 22 through fasteners, or the lower end cover 23 can be welded with the magnetic steel fixing ring 22, and the lower end cover 23 can be made of a low-carbon steel plate with good welding performance. The shell comprises an upper shell 59 and a lower shell 60, the upper shell 59 and the lower shell 60 are made of anticorrosive materials, the anticorrosive materials are preferably rotating bodies which are formed by drawing stainless steel plates for the upper shell 59 and the lower shell 60 and are provided with flanges 78, and the upper shell 59 and the lower shell 60 are hermetically connected and arranged on the peripheries of the upper end cover 21, the lower end cover 23 and the magnetic steel fixing ring 22.

The upper end cover 21 of the four rotors may be provided with a bearing chamber 53 therein, and the bearing chamber 53 and the upper end cover 21 may be provided integrally or separately. The fixed shaft 26 is supported by the bearing 110, the bearing 110 can be completely arranged in the bearing chamber 53 of the upper end cover 21, and the stator 25 is arranged at the lower end of the fixed shaft 26; or one of the bearings 110 is disposed in the bearing chamber 53 of the bottom of the rotating body or the bearing chamber 53 of the lower end cap, the stator 25 is disposed on a neutral position between the two bearings 110 of the fixed shaft 26. The upper part of the rotor has an extension of a stationary shaft 26, which is provided with sealing means. The fixed shaft 26 is connected with a floating body, the whole machine floats on the water surface by the floating body, and the rotor drives the impeller to rotate together for oxygenation during work. The anti-corrosion material can also be plastic.

In the embodiment, the upper end of a fixed shaft 26 of an outer rotor permanent magnet brushless motor of a vane aerator extends out of a rotor, a sealing device is arranged between the rotor and the fixed shaft 26 to enable the rotor to rotate in a sealing way, an outgoing line 48 of a stator coil of the motor is led out from an inner hole of the fixed shaft 26 in a sealing way and is connected with a controller 36, the controller 36 is arranged on the top of a supporting seat 35 at the upper part of the aerator, and a metal heat dissipation shell is arranged outside the controller 36.

The sealing device arranged between the upper part of the upper shell 59 and the extending port of the fixed shaft comprises a static sealing ring arranged at the combining position of the upper shell 59 and the upper part of the shell of the bearing chamber or sealed by sealant; the upper section of the fixed shaft 26 extending out of the bearing is provided with a dynamic seal, and the dynamic seal comprises a framework oil seal 30 or a mechanical seal; or a sealing chamber is arranged on the top of the upper shell, the sealing chamber can be integrated with the shell of the bearing chamber, or the sealing chamber can be formed by arranging the injection molding piece 92 on the upper part of the bearing chamber 53, and the sealing chamber spigot 113 of the injection molding piece 92 can enter the bearing chamber to axially position the bearing; or a stainless steel protective shell 93 can be arranged outside the sealed chamber, and the protective shell 93 can be integrated with the upper shell 59.

The magnetic steel fixing ring 22 and the upper end cover 21 of the outer rotor permanent magnet brushless motor are formed by drawing low carbon steel plates into an integral rotating body, the bearing chamber shell 100 is connected with the rotating body to form a rotor assembly of the permanent magnet brushless motor, the opening part of the rotating body faces downwards, the straight wall forms the magnetic steel fixing ring 22, and magnetic steel 24 is arranged in the magnetic steel fixing ring 22.

The sealing device arranged between the upper part of the upper shell 59 and the extending port of the fixed shaft comprises a static sealing ring arranged at the combining position of the upper shell 59 and the upper part of the bearing chamber shell, and the static sealing ring can use an O-shaped ring 74.

The combination of the magnetic steel fixing ring 22, the upper end cover 21 and the bearing chamber shell 100 of the outer rotor permanent magnet brushless motor is manufactured by one of the following methods:

a. the upper end cover 21 and the bearing chamber housing 100 can be cast into a whole, and the magnetic steel fixing ring 22 is made of low carbon steel and is connected with the low carbon steel through threads or fasteners.

b. The upper end cover 21 and the magnetic steel fixing ring 22 are rotators formed by drawing low-carbon steel plates, the bearing chamber shell 100 is provided with a flange 101 or a step, and the bearing chamber shell 100 and the rotators can be fastened by bolts 65 or connected by threads; the blank of the bearing chamber housing 100 may be cast.

c. The upper end cover 21 and the magnetic steel fixing ring 22 can be arranged into a whole and formed by drawing low-carbon steel plates, the bearing chamber shell 100 can be formed by sawing seamless tubes and can be welded together, a reinforcing plate 103 can be additionally welded between the bearing chamber shell and the seamless tubes, and the welded bearing chamber shell and the welded reinforcing plate are cut to be required sizes. The cutting process may be preceded by an aging treatment.

The fixed shaft 26 of the outer rotor permanent magnet brushless motor extends out of the rotor towards the upper end, a sealing element can be arranged between the upper end cover 21 of the rotor and the fixed shaft 26, an outgoing line 48 of a motor stator coil is led out from an inner hole of the fixed shaft and is connected with a controller 36, the motor controller is arranged on the top of a supporting seat 35 at the upper part of the aerator, and a metal heat dissipation shell is arranged outside the controller 36.

The middle part of the supporting seat 35 is provided with a hole 83 for passing through a fixed shaft of the outer rotor permanent magnet brushless motor; the support seat 35 is provided with three mounting grooves 50 for the support rod 4, and the positions of the three mounting grooves 50 are respectively deviated from the center of the aerator; the metal heat radiation shell is in a cover shape with a flange formed by drawing stainless steel, a mounting hole 104 for fixing the support rod 4 is arranged at the flange 39, a bolt 106 passes through the mounting hole 104 of the flange of the cover to be fastened with the plastic supporting seat 35 and the support rod 4, and the cover 111 with the flange 39 covers the upper part of the plastic supporting seat 35, so that the rigidity of the plastic supporting seat 35 can be improved.

The supporting seat 35 can be made of metal or plastic, a hole 83 for passing through a fixed shaft of the outer rotor permanent magnet brushless motor is arranged in the middle of the supporting seat 35, and a key or an anti-rotation mechanism with local flat 28 can be arranged on the fixed shaft 26. The lower part of the supporting seat can be provided with a waterproof ring 88, and the waterproof ring 88 covers the outer surface of the sealing element shell to further improve the waterproof performance. The support 35 is provided with the mounting groove 50 of three bracing pieces, and the center of oxygen-increasing machine is squinted respectively in the position of three mounting groove 50, and the offset is substantially the same, mounting groove 50 can set up to rectangle or semi-circle. The metal heat dissipation shell can be in the shape of a cover with a flange formed by drawing stainless steel, a mounting hole 104 for fixing the support rod 4 is formed in the flange 39, a bolt 106 penetrates through the mounting hole 104 of the flange of the cover to be fastened with the plastic support seat 35 and the support rod 4, the cover 111 with the flange 39 covers the upper part of the plastic support seat 35 to form a combination of the metal and the plastic support seat 35, so that the combination and the support rod 4 are fastened more firmly by the bolt, the three support rods 4 are made of metal tubes, and the metal tubes comprise square tubes and circular tubes or one end of each circular tube is pressed into a square shape.

A connecting hole and an anti-rotation mechanism for connecting the fixed shaft 26 are arranged in the supporting seat 35; the anti-rotation mechanism comprises a gasket 38 with a square shape, the gasket 38 with the square shape can be arranged in a square window 49 of the supporting seat 35, and an inner hole of the gasket 38 with the square shape is matched with a key on the fixed shaft 26 or the anti-rotation mechanism with the local flat part 28. The square gasket 38 may be disposed in two square windows 49 of the supporting base 35. The gasket can be embedded in the plastic support 35.

The stainless steel upper shell 59 and the lower shell 60 of the rotor of the outer rotor permanent magnet brushless motor are rotary bodies with flanges 78 at the mouth parts, which are formed by drawing, the rotary bodies are matched with the excircle of the magnetic steel fixing ring 22, and sealing rings can be arranged in the space between the transition circular arcs of the flanges and the straight walls of the upper shell 59 and the lower shell 60 and the excircle of the magnetic steel fixing ring 22. Or the upper opening of the rotator with the flange on the shell of the rotor is provided with a drawn arc surface, the height of the seam allowance 90 of the upper end cover is larger than the axial height of the arc surface, and the sealing ring is arranged in a space formed by the arc surface and the upper end cover 21.

The stainless steel upper shell 59 and the lower shell 60 of the rotor of the outer rotor permanent magnet brushless motor are rotary bodies with flanges 78 at the mouth parts, the rotary bodies are formed by drawing, the rotary bodies are matched with the excircle of the magnetic steel fixing ring 22, an O-shaped sealing ring 61 can be arranged in the space between the transition circular arcs of the flanges of the upper shell 59 and the lower shell 60 and the straight wall and the excircle of the magnetic steel fixing ring 22, and the upper shell and the lower shell can be arranged in a step shape. The transition position of the flange of the rotator with the flange on the shell of the rotor and the straight wall is provided with an arc surface, the seam allowance 90 of the upper end cover is higher than the axial height of the arc surface, and the O-shaped sealing ring 31 can be arranged in the space formed by the arc surface and the upper end cover 21.

The magnetic steel fixing ring 22 of the rotor of the outer rotor permanent magnet brushless motor is a rotating body with a hole in the middle, which is formed by drawing a low-carbon steel plate, and the rotating body with the hole is a combination of the magnetic steel fixing ring 22 and the upper end cover 21. The bearing chamber shell 100 can pass through a hole 109 in the middle of the rotating body, and the bearing chamber shell 100 and the rotating body form a rotor assembly; the rotator and the bearing chamber housing 100 can be welded into a whole, or the bearing chamber housing 100 is provided with a flange 101 or a step and connected with the rotator through a fastener.

The method for sealing and connecting the upper shell flange and the lower shell flange comprises the steps that the upper shell 59 and the lower shell 60 are positioned by the excircle of the magnetic steel fixing ring, an O-shaped sealing ring 61 is arranged in a vacancy between a transition circular arc between the upper shell flange and the lower shell flange and the excircle of the magnetic steel fixing ring and a straight wall, and the upper shell flange and the lower shell flange are fastened by bolts 62 after being butted. The connecting holes 63 for driving the impeller to rotate can also be arranged on the upper shell flange and the lower shell flange, and the connecting holes 63 are distributed circumferentially. The magnetic steel fixing ring 22 can be made of low-carbon steel.

And the stainless steel upper shell is arranged on the periphery of the upper end cover and the magnetic steel fixing ring. A vacant position can be arranged between the upper shell and the upper end cover, and a window 82 or a through hole 66 for increasing air circulation can be arranged on the upper end cover, so that the heat dissipation effect is improved. The upper housing may be screwed to the upper end cap. The screw fastening position can be provided with an O-shaped sealing ring to prevent water from entering the screw hole.

The upper end cover 21 can be provided with two bearing chambers 53, a neutral gear is arranged between the two bearing chambers 53, the upper end of the fixed shaft 26 is supported by a rolling bearing and extends out after being sealed, and the lower end of the fixed shaft 26 can be connected with the stator 25. The fixed shaft 26 can be made of a tube, the leading-out wire of the stator coil of the motor can be led out from the lower part of the stator, and the inner hole of the tube is a hole 27 which passes through the leading-out wire. The inner hole of the tube can be sealed after passing through the outgoing line.

The support rod 4 can be provided with a water body reflection plate 2, and when the aerator works, the water body raised by the impeller is reflected and sprayed on the controller 36 and the outer rotor permanent magnet brushless motor to increase the cooling effect; the extending direction of the structural support rod in the figure 1 is opposite to the rotating direction of the impeller, and no water body reflecting plate is arranged. The top of the controller 36 is provided with a wire outlet, an input lead of the controller 36 is led out from the wire outlet and enters a junction box 37 which is arranged at the top of the controller and has a waterproof function, the junction box 37 comprises a junction box base 40 and a junction box cover 41 covering the outside of the junction box base, a junction device is arranged on the junction box base 40, the input lead of the controller 36 is connected in the junction device, and a power wire 43 enters the junction box from the lower part of the junction box 37 and is communicated with the input lead of the controller in the junction device. The power line 43 can be automatically connected into the junction box with the waterproof function by a user, and the electric leakage caused by the fact that the power line 43 carried by the aerator is limited in length and needs to be additionally connected with a power line can be avoided. The waterproof function of the junction box comprises that the wiring terminal 42 can be arranged on the top of the junction box base 40, an input lead of the controller penetrates through a top hole to be connected into the wiring terminal 42, a power line 43 enters the junction box from a groove 54 on the side surface to be communicated with the wiring terminal, and water splash can not enter the wiring terminal 42 from a power line inlet after covering the junction box cover 41. The number of the screw holes 91 for connecting the terminal box cover 41 and the terminal box base 40 can be three, wherein two screw holes 91 are arranged on two sides of the groove.

The upper end of the fixed shaft 26 of the outer rotor permanent magnet brushless motor 1 extends out of the outer rotor, a sealing element is arranged between the outer rotor and the fixed shaft 26, and a plurality of sealing elements can be arranged and added with lubricating grease. The lead-out wire 48 of the motor stator coil is led out from the hole 27 of the lead-out wire of the fixed shaft 26, and the lead-out wire 48 of the motor stator coil is sealed with the fixed shaft 26.

The magnetic steel fixing ring 22 and the lower end cover 23 can be a rotator with flanges formed by drawing a low-carbon steel plate, magnetic steel 24 is arranged on the inner wall of the rotator, the bottom of the rotator is the lower end cover 23, and a bearing chamber 53 of the lower end cover can also be formed by reverse holes or welded; the flange 55 is provided with a hole 56 for connection with an upper end cap, and the upper end cap 21 is connectable with the flange 55. The drawn rotor may be welded to a transition plate 86, the transition plate 86 having a bore 87 for connection to an impeller.

The stator 25 of the outer rotor permanent magnet brushless motor is provided with a fixed shaft 26, an outgoing line 48 of a stator coil of the motor is led out from a hole 27 of the outgoing line of the fixed shaft 26 and is connected with a motor controller 36, the motor controller 36 is arranged on the top of a supporting seat 35 at the upper part of the aerator, a metal radiating shell is arranged outside the controller 36, water splashed when the aerator works cools the controller 36, and the controller 36 can also realize the speed regulation function.

Heat conducting oil can be filled in the outer rotor permanent magnet brushless motor to increase the heat dissipation effect of the motor and improve the insulation performance; the heat conducting oil comprises transformer oil.

The impeller comprises a circular impeller 3 or a conical impeller 84, the circular impeller 3 comprises a circular ring body and blades 13, and a plurality of positioning columns 112 and a plurality of connecting holes 51 which are connected with the rotor of the outer rotor permanent magnet brushless motor can be arranged on the circular ring body; the positioning posts 112 and the connecting holes 51 can be arranged in a grid, and the positioning posts 112 can improve the transmission capability of the moment.

The impeller further comprises a conical impeller 84, the conical impeller comprises a conical body 94, blades 95 and a fixing seat 96, the upper end of the conical body 94 is large, the lower end of the conical body 94 is small, the fixing seat 96 is arranged in the conical body 94, the fixing seat 96 can be provided with a plurality of positioning columns 112 and connecting holes 97 which are connected with a rotor of the outer rotor permanent magnet brushless motor, the outer side of the conical body 94 is provided with a plurality of blades 95, and the blades 95 are combined with the conical body 94 in an inclined mode. The plurality of connecting holes 97 are connected with the rotor of the outer rotor permanent magnet brushless motor and fastened by a fastening piece 81.

The conical impeller 84 is characterized in that the upper end of the outer side of the conical body 94 is provided with a water clapper 99 which is basically vertical to the upper end surface of the conical body, and the working surface C107 of the water clapper 99 and the working surface A108 of the blade are in smooth transition; the lower end of the cone 94 is provided with a water-retaining filter screen 98, the water-retaining filter screen 98 can prevent sundries, fishes and shrimps from entering the cone 94, and the cone impeller 84 is integrally formed in one-step injection molding mode.

The annular impeller 3 can comprise an inner annular ring 18 and an outer annular ring 12 which are basically concentric, a plurality of connecting holes 51 connected with a rotor of the outer rotor permanent magnet brushless motor are formed in the inner annular ring 18, a neutral gear is arranged between the outer annular ring 12 and the inner annular ring 18, a connecting plate 34 is arranged on the neutral gear, the outer annular ring 12 is connected with the blades 13, and the annular impeller is integrally formed in an injection molding mode.

The inner annular ring 18 can be provided with a plurality of connecting holes 51 connected with the rotor of the outer rotor permanent magnet brushless motor, the reference circle of the inner annular ring is the largest, the large hole site reference circle has the advantages of increasing the torque transmission capacity and saving the plastic cost, and the inner diameter of the inner annular ring of the impeller can be larger than 200 mm.

The blades 13 are provided with water passing holes 17 or water passing grooves 16, so that the water flowers are thinner and the oxygen increasing effect is better.

The circular ring-shaped impeller comprises a circular ring body and a plurality of blades, a plurality of water passing holes 17 or water passing grooves 16 are formed in the blades 13, a supporting plate 45 is arranged on the back face of the upper end of each blade 13, and a reflecting plate 19 for scattering water passing through the water passing holes 17 or the water passing grooves 16 is arranged below the supporting plate 45.

The lower part of the blade 13 is not provided with a water channel to improve the water lifting amount, the lower part of the blade 13 is provided with a water guide strip, and the water guide strip can be arranged at the outermost edge of the blade. The water guide strip can enable the water body to flow upwards, and the water pumping height is improved. The upper part of the blade may be provided with a reflection plate 19 for scattering the water passing through the water passing hole 17 or the water passing trough 16.

The impeller disc can be composed of annular rings, a neutral gear can be arranged between the outer annular ring 12 and the inner annular ring 18, a plurality of connecting holes 51 connected with an outer rotor of the outer rotor permanent magnet brushless motor are arranged on the inner annular ring 18, and when the aerator works, a water body is lifted to cool the motor.

The hollow baffle is provided with a connecting plate 34, the connecting plate 34 can be arranged in an inclined plane, and the connecting plate 34 arranged in the inclined plane has the cooling effect of a water lifting function enhanced motor when the impeller rotates. An outer annular ring 12 connects the plurality of vanes 13.

The blades 13 are provided with a plurality of water through holes 17 or water through grooves 16, the blades 13 and the impeller disc are arranged into a whole, the blades 13 have the function of raising the water under the action of the inclined surface when the impeller rotates, and the water through holes 17 and the water through grooves 16 arranged on the blades 13 aim to enable a part of water to be impacted from the water through holes 17 or the water through grooves 16 and a reflecting plate 19 arranged behind the blades to enable the water to be scattered more effectively and improve the oxygenation effect; the provision of the baffle plate 19 together with the support plate 45 on the back of the upper end of the blade increases the strength of the blade. The outer side of the blade 13 may be provided with a reinforcing strip 20 to further increase the strength of the blade. The impeller may be integrally injection molded.

The aerator floats on the water surface, the blades 13 can be divided into upper blade sections 14 and lower blade sections 15, the lower blade sections 15 are basically underwater, the upper blade sections 14 are basically on the water, the included angle alpha between the lower blade sections 15 and the bottom plane of the circular impeller is smaller than the included angle alpha 1 between the upper blade sections 14 and the bottom plane of the circular impeller, and the lower blade sections 15 and the upper blade sections 14 are in smooth transition.

The impeller can be provided with an indication mark of the depth of water entering, the power required by the impeller working at the position of the indication mark of the depth of water entering is matched with the power of the motor, and the depth of water entering of the impeller can be adjusted by a method for adjusting the height of floating water.

The reflecting plate 19 and the supporting plate 45 are connected together to form an obtuse angle structure, the supporting plate 45 is basically horizontally arranged on the back of the blade 13, and one side of the supporting plate 45 is connected with the blade 13 while the other side is connected with the reflecting plate 19. The outer side of the blade 13 can be provided with a reinforcing strip 20, the upper end of the reinforcing strip 20 is connected with the supporting plate 45, and the reinforcing strip 20 can increase the strength of the blade and improve the water pumping capacity. The reflecting plate 19 and the supporting plate 45 are connected together to form an obtuse angle structure, and the supporting plate 45 is arranged on the back of the blade 13 basically horizontally.

The floating body mainly comprises: the hollow shell body 5 is formed by blow molding of plastics, and the connecting mechanism comprises a bracket 6 and a connecting hole which are arranged on the hollow shell body. The bracket 6 can be made of metal or plastic, and the bracket 6 can be provided with a round or semicircular or flat-bottom-shaped support rod mounting position 8 to be suitable for a square or round support rod 4. Or the connecting mechanism comprises a bolt 119 preset on the hollow shell, and the bolt 119 is fastened with a hole of the supporting rod by matching a nut; or the hollow shell 5 is provided with a preset nut, and the bolt is fastened with the preset nut through the hole of the supporting rod.

The bracket 6 comprises a bottom plate 7 and two side plates 11, the two side plates 11 are provided with holes 46 connected with the support rod 4, the bottom plate 7 is provided with a hole 10 connected with the top of the hollow shell, and the bracket 6 is fixed on the top of the hollow shell 5 by bolts or nuts. The supporting rod 4 is arranged in an a mounting position 8 of the supporting rod of the bracket and is fastened by a bolt. The support rod 4 can be made of metal pipes, and the metal pipes comprise rectangular pipes or circular pipes.

The bracket 6 can be injection molded from a plastic material compatible with the hollow housing 5, and the anchor 47 can be disposed under the bottom plate 7, wherein the anchor 47 is embedded in the top of the hollow housing 5 during blow molding.

The hollow shell 5 can be set to be approximately a cuboid, each corner of the cuboid is in smooth transition, and the bottom surface of the floating body is concave upwards. The cavity 118 on the bottom surface can accommodate the bracket 6 as another floating body, so that the volume for packing and storing and transporting can be reduced.

Two or more groups of holes 46 can be arranged on the two side plates 11 of the bracket. The selection of the connected holes 46 of different heights can adjust the water depth of the aerator impeller. The bracket can be internally provided with a stud, the stud comprises a stud of a polished rod or is embedded in the bracket when the head of the bolt is injected, and the stud is embedded in the top of the hollow shell 5 more firmly when the bracket is blown.

The bolt 119 can be arranged on the support rod 4, the upper nut 116 is arranged on the support rod, and the lower nut 117 can be arranged below the support rod, so that the support rod can be adjusted up and down, and the purpose of adjusting the water inlet depth of the impeller is achieved.

The other design is an integral floating body which can work independently, a hole which is communicated up and down is arranged in the integral floating body, the lower part of the hole is a cylinder 69, and the upper part of the hole is a conical or trumpet-shaped diffusion opening 68.

The overall floating body can be square or round in shape, and the square floating body 67 is convenient to package. The integral floating body can be formed by blow molding, and the utilization rate of square floating body materials is high during blow molding. Two opposite sides of the square floating body 67 can be provided with positioning holes 72 for fixing inserted rods or ropes. A positioning rod can be inserted into the positioning hole 72 to position the aerator in the fish pond, and a rope can also be arranged in the positioning hole 72 to position the aerator in the fish pond. A plurality of fan-shaped floating bodies can be combined into the round integral floating body.

In the blow molding of the integral floating body, preferably, three grooves 70 are arranged at the periphery of the diffusion opening, and screw holes 71 for fixing fasteners of the support rod 4 are arranged at two sides of each groove 70. The support rod 4 is a hollow tube and can be fixedly connected to the outer rotor permanent magnet brushless motor through a supporting seat 35, and the end of the support rod 4 connected with the supporting seat 35 is higher than the end of the floating body. The support bar 4 may be formed by bending a metal tube.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. An impeller type aerator mainly comprises an outer rotor permanent magnet brushless motor, a controller, an impeller, a supporting seat, a supporting rod and a floating body, and is characterized in that the outer rotor permanent magnet brushless motor mainly comprises a stator and a rotor; the stator is provided with a fixed shaft, the fixed shaft is provided with a hole for leading out wires of the motor stator coils to pass through, the leading out wires of the motor stator coils are led out from the upper end of the fixed shaft after being sealed and enter a sealing box in the supporting seat, and output wires of the controller also enter the sealing box in the supporting seat and are connected with the leading out wires of the motor stator coils; the impeller is arranged below the motor, the supporting seat is arranged above the motor, the controller is arranged above the supporting seat, one end of the supporting rod is connected with the supporting seat, the other end of the supporting rod is connected with the floating body, the whole machine floats on the water surface by the floating body, and the motor drives the impeller to rotate to increase oxygen during working.

2. The impeller type aerator of claim 1, comprising: the rotor mainly comprises an upper end cover, a magnetic steel fixing ring and a shell, and the structure of the rotor comprises one of the following components:

the upper end cover of any one of the four types is internally provided with a bearing chamber, the fixed shaft is supported by the bearing, the upper part of the rotor is provided with an extension port of the fixed shaft, the extension port is provided with a sealing device, the whole machine floats on the water surface by virtue of a floating body, and the rotor drives the impeller to rotate together for oxygenation when the machine works; the corrosion-resistant material comprises plastic or stainless steel.

3. The impeller type aerator of claim 2, comprising: the shell with the corrosion resistance comprises a stainless steel rotary body with a flange formed by drawing; the upper shell and the lower shell made of the anticorrosive material comprise a stainless steel deep-drawing formed rotating body; the fixed shaft is connected with two bearings, and a neutral gear is arranged between the two bearings; the bearings are all arranged in the bearing chamber of the upper end cover, and the stator is arranged at the lower end of the fixed shaft; or one of the bearings is arranged in the bearing chamber at the bottom, and the stator is arranged on a neutral position between the two bearings.

4. The impeller type aerator according to claim 1, wherein the support base is provided with a hole through which a fixed shaft of the outer rotor permanent magnet brushless motor passes in the middle thereof; the support base is provided with three mounting grooves for the support rods, and the positions of the three mounting grooves are respectively deviated from the center of the aerator; the controller shell is in a shape of a cover with a flange formed by drawing stainless steel, the flange is provided with a mounting hole, and the cover with the flange is fixed on the upper part of the supporting seat.

5. A vane-type aerator as claimed in claim 3, comprising: the supporting seat is made of plastics, and a fixed shaft connecting hole and an anti-rotation mechanism for connecting the outer rotor permanent magnet brushless motor are arranged in the supporting seat; the anti-rotation mechanism comprises an anti-rotation gasket arranged in the supporting seat, and an inner hole of the anti-rotation gasket is matched with a key on the fixed shaft or an anti-rotation position which is locally flat.

6. The impeller type aerator of claim 2, comprising: the sealing device arranged on the upper part of the upper shell and the extending port of the fixed shaft comprises a static seal arranged at the combination position of the upper shell and the upper part of the bearing chamber shell; the upper section of the fixed shaft extending out of the bearing is provided with a dynamic seal, and the dynamic seal comprises a framework oil seal or a mechanical seal.

7. The impeller type aerator according to claim 1, wherein the impeller comprises a circular impeller or a conical impeller, the circular impeller comprises a circular ring body and blades, the circular ring body is provided with a connecting position and a plurality of connecting holes, the connecting position is connected with a rotor of the outer rotor permanent magnet brushless motor, and the blades are arranged outside the circular ring body; or the impeller is a conical impeller and comprises a conical body, blades and a fixed seat, the upper end of the conical body is large, the lower end of the conical body is small, the fixed seat is arranged in the conical body, a connecting hole matched with the rotor is formed in the fixed seat, a plurality of blades are arranged on the outer side of the conical body, and the blades and the conical body are combined in an inclined mode.

8. The impeller type aerator of claim 2, comprising: the upper shell and the lower shell of the rotor of the outer rotor permanent magnet brushless motor are rotating bodies with flanges, the rotating bodies are matched with the excircle of the magnetic steel fixing ring, and a sealing ring is arranged in a gap between the transition circular arc of the flanges of the upper shell and the lower shell and the straight wall and the excircle of the magnetic steel fixing ring; or the upper opening of the rotator with the flange on the shell of the rotor is provided with a drawn arc surface, and the sealing ring is arranged in a space formed by the arc surface and the spigot of the upper end cover.

9. The impeller type aerator of claim 2, comprising: the outer rotor magnetic steel fixing ring of the outer rotor permanent magnet brushless motor is a rotating body which is formed by drawing a low-carbon steel plate and is integrated with the upper end cover, the shell of the bearing chamber is connected with the rotating body to form an outer rotor assembly of the permanent magnet brushless motor, the opening part of the rotating body is downward, the straight wall of the rotating body is a magnetic steel fixing ring, and magnetic steel is arranged in the magnetic steel fixing ring.

10. The impeller type aerator of claim 9, comprising: the combination of the magnetic steel fixing ring, the upper end cover and the bearing chamber shell is manufactured by one of the following methods: