Impeller type oxygenator

Abstract

The present application relates to a kind of impeller type oxygenators, mainly including water-cooled motor, support disc, reduction gearbox, impeller, float and support rod, the support disc is arranged in the upper motor of reduction gearbox lower portion, with bolt makes motor, support disc and reduction gearbox seal fastening;The support disc is arranged with the connecting position of support rod connection, rectangular support rod is connected with support disc, so that the water surface of rectangular support rod can reflect the water splash produced by impeller rotation and pour on water-cooled motor to cool water-cooled motor, save the trouble that existing water-cooled impeller type oxygenator needs to set up anti-water board;The outer end of support rod is connected with float, and the whole machine is floated on water surface by float;When working, motor drives impeller to rotate and increase oxygen by reduction gearbox.

Description

TECHNICAL FIELD

[0001] The present application relates to an oxygenator, in particular to a convenient-to-manufacture impeller-type oxygenator, and belongs to the technical field of aquaculture machinery. BACKGROUND

[0002] The oxygenator is a device for saving and growing fish and shrimps in aquaculture. The existing mechanical oxygenator mainly includes a waterwheel-type oxygenator, an impeller, and an impeller-type oxygenator. The existing impeller-type oxygenator generally connects a support rod to a motor and a speed reducer, connects a floating body to the support rod, and connects the support rod to a shell of the speed reducer. The shell of the speed reducer is cast into shape, and at least three special connection positions are provided on the shell for connecting the support rod. The connection positions need to be milled, drilled, and threaded, which increases the manufacturing cost. The existing impeller-type oxygenator is generally not waterproof, and a waterproof cover needs to be installed on the motor. A water-cooled motor is cooled by a backwater plate that reflects the water splashed by the rotation of the impeller to the motor. However, the backwater plate is troublesome and often fails to cool the motor effectively, resulting in burning of the motor. SUMMARY

[0003] The present application aims to overcome the shortcomings of the prior art and provide an impeller-type oxygenator that sets a support disc between a motor and a speed reducer, connects a rectangular support rod to the support disc, and reflects water splashed by the rotation of the impeller on the water surface to the motor to cool the motor.

[0004] The present application is achieved as follows:

[0005] An impeller-type oxygenator mainly includes a water-cooled motor, a support disc, a speed reducer, an impeller, a floating body, and at least three rectangular support rods. The support disc is arranged on the upper part of the speed reducer and the lower part of the motor, and the motor, the support disc, and the speed reducer are tightly fastened by bolts. The support disc is provided with connection positions for connecting the support rods. The rectangular support rods are connected to the support disc, so that the water splashed by the rotation of the impeller can be reflected on the water-cooled motor to cool the motor, thereby eliminating the need for a backwater plate in the existing water-cooled impeller-type oxygenator. The outer ends of the support rods are connected to the floating body, and the entire machine floats on the water surface by the floating body. When working, the motor drives the impeller to rotate and increase oxygen through the speed reducer.

[0006] The connection positions of the support disc are provided with limiting devices to limit the setting direction of the rectangular support rods and prevent the support rods from being installed in reverse to reduce the ability to reflect water splashes. If the impeller rotates counterclockwise, the outer ends of the rectangular support rods arranged around the water-cooled motor are arranged clockwise. The inner ends of the support rods are connected to the support disc and fastened by bolts.

[0007] The motor includes a water-cooled motor, the housing of which is made of stainless steel, the upper end of the motor housing is sealed, the lower end of the motor housing is provided with a lower bearing seat, and the lower bearing seat is connected with a support disc; a seal is arranged between the lower bearing seat, the support disc and the stainless steel motor housing; the periphery of the support disc is provided with mounting positions for mounting support rods and connecting holes, the number of the support rods is not less than three, the inner ends of the support rods are connected with the mounting positions of the support disc, and the outer ends of the support rods are connected with a floating body, the whole machine is floated on the water surface to work by the floating body; the floating body includes a whole floating body or a split floating body, the whole floating body includes a blow-molded flat hollow body, a large hole is arranged in the middle of the flat hollow body, and the motor and the reduction box are arranged in the large hole in the middle of the whole floating body and are fixed by the support rods; or the split floating body includes blow-molded hollow bodies, and the number of the floating bodies is not less than three, and each floating body is arranged at the outer end of a support rod; the water-cooled motor is cooled by water splashes raised when the impeller of the oxygenator works.

[0008] A connecting position matched with the flange of the lower bearing seat of the motor is arranged on the upper surface of the support disc, the positioning ring of the lower bearing seat of the motor passes through the through hole in the support disc and is matched with the opening of the reduction box, and the motor, the support disc and the reduction box are tightly fastened by bolts; or a connecting position matched with the motor housing is arranged on the upper surface of the support disc, and a positioning ring matched with the opening of the reduction box is arranged on the lower surface of the support disc.

[0009] The motor includes a permanent magnet synchronous motor, a magnetic steel is arranged on the rotor of the permanent magnet synchronous motor, the permanent magnet motor is provided with a driver or is not provided with a driver, the driver is provided with a speed regulating function or is not provided with a speed regulating function, and the driver is arranged on the stainless steel motor and is cooled by water splashes raised when the impeller works.

[0010] The lower bearing seat is combined with an outer ring-shaped part punched and formed by a stainless steel plate, the outer ring-shaped part is arranged on the reduction box, and the outer ring-shaped part is fastened to the box body of the reduction box by fastening bolts or studs through the support disc; or a sealing gasket is arranged between the outer ring-shaped part and the box body of the reduction box, and the sealing gasket includes a skirt part for preventing rain.

[0011] The impeller includes a conical impeller and a circular ring-shaped impeller, the circular ring-shaped impeller includes a connecting position for connecting the output shaft of the oxygenator arranged on a ring-shaped ring, the middle part of the connecting position is concave downward, and a connecting hole for connecting the flange of the output shaft of the oxygenator is arranged in the concave part; a plurality of blades are connected with the ring-shaped ring, the blades have curved working surfaces, a water passing hole is arranged on the upper section of the blade, and no water passing hole is arranged on the lower section of the blade.

[0012] A hollow impeller inner floating body is arranged in the circular ring-shaped impeller body, the hollow impeller inner floating body is blow-molded, and the impeller inner floating body is fixed in the circular ring-shaped impeller body.

[0013] The upper end of the box body of the reduction gearbox is provided with a positioning stopper, and a reduction gear is arranged in the box body, the reduction gear comprises a driving pinion mounted on a motor shaft to drive a first driven gear, the first driven gear is coaxial with a second driving pinion, the second driving pinion drives a second driven gear, the second driven gear is mounted on an output shaft, the second driving pinion is provided with an upper bearing and a lower bearing at both ends of the shaft, the upper bearing is arranged in a bearing chamber of the upper end of the box body, and the lower bearing is arranged in a bearing chamber of the bottom of the box body; the motor and the reduction gearbox are assembled on the same axis, the output shaft is sealed by a mechanical seal or a skeleton oil seal and then extends downward, and the output shaft drives the impeller to rotate during work.

[0014] The motor and the planetary reduction mechanism of the oxygenator are arranged as a whole, mainly comprising a motor and a planetary reduction part; the motor mainly comprises a rotor, a stator, a motor shell, an upper bearing seat and a lower bearing seat; the planetary reduction part mainly comprises an inner ring gear, a plurality of planetary gears and a sun gear in the middle; the motor shaft is rotatably supported by the upper bearing and the lower bearing, the upper bearing and the lower bearing are arranged in bearing chambers of the upper bearing seat and the lower bearing seat respectively, the lower end of the motor shaft extends downward, and the sun gear is connected to the extending end; during work, the sun gear of the motor shaft drives the planetary gears, the planetary gears are provided with bearings, the shafts of the plurality of planetary gears are arranged on the same planetary gear frame, and the planetary gear frame is fixed to the lower bearing seat and does not rotate; the inner ring gear is provided with a cover, the cover is provided with a bearing, and the inner circle of the bearing is directly or indirectly connected to the lower bearing seat of the motor; the planetary gears drive the inner ring gear, the cover and the protective shell to rotate at low speed under the drive of the sun gear shaft, the components rotating at low speed are the outer rotors driving the impeller of the oxygenator to rotate, the protective shell mainly comprises an upper protective shell and a lower protective shell, the upper end of the upper protective shell is provided with a port ring, the port ring can extend upward into the waterproof ring arranged at the lower end of the motor to form a labyrinth seal, a sealing element can be arranged between the port ring and the planetary gear frame, or a sealing element can be arranged between the port ring and the waterproof ring, the lower protective shell is sealingly connected to the upper protective shell, and the protective shell rotates together with the inner ring gear during work.

[0015] Compared with the prior art, the present application has the following outstanding advantages:

[0016] The motor lower part of the invention is provided with a support disc connected with the support rod, the support disc is arranged at the upper part of the motor and the lower part of the reduction gearbox, the motor, the support disc and the reduction gearbox are tightly fixed by bolts; the periphery of the lower surface of the support disc is provided with a connecting position and a fixing hole connected with the support rod, the inner end of the support rod is connected with the support disc by bolts, the outer end of the support rod is connected with the floating body to make the oxygenator float on the water surface to work, the support disc is equivalent to the upper cover of the reduction gearbox. The periphery of the upper cover extends outward to become the connecting position of the support rod, the working hours of machining the connecting position of the support rod on the reduction gearbox are saved, and the cost is reduced. The rectangular support rod is non-radiationally connected under the support disc, the water body is lifted by the impeller rotation, the water surface of the rectangular support rod reflects the water splashes lifted by the impeller rotation to sprinkle on the motor, the cooling effect of the motor is improved, the technical problem that the water-cooled motor of the impeller type oxygenator must be provided with a water baffle is solved, the cooling effect of the water-cooled motor is more reliable. The support disc can be formed by injection molding or pressure casting, and no cutting machining is needed, which is suitable for mass production. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the structure diagram of the stainless steel water-cooled motor and the two-stage reduction reduction gearbox of the invention (the outer ring-shaped body is connected with the lower bearing seat); Figure 2 is the structure diagram of the stainless steel water-cooled motor and the two-stage reduction reduction gearbox of the invention (the inner part and the outer ring-shaped part are welded into the lower bearing); Figure 3 is the structure diagram of the stainless steel water-cooled motor and the two-stage reduction reduction gearbox of the invention (the lower end of the stainless steel motor is not provided with a flange); Figure 4 is the structure diagram of the stainless steel water-cooled motor and the two-stage reduction reduction gearbox of the invention (the lower end of the stainless steel motor is not provided with a flange); Figure 5 is the structure diagram of the stainless steel water-cooled motor and the two-stage reduction reduction gearbox of the invention (the lower end of the stainless steel motor is provided with a flange); Figure 6 is the three-dimensional structure diagram of the stainless steel water-cooled motor and the two-stage reduction reduction gearbox of the invention (the lower part of the plastic support disc has a protective shell); Figure 7 is the three-dimensional structure diagram of the stainless steel water-cooled motor and the two-stage reduction reduction gearbox of the invention (the lower part of the plastic support disc has a protective shell); Figure 5 ; Figure 8 is the three-dimensional structure diagram of the stainless steel water-cooled motor and the two-stage reduction reduction gearbox of the invention (the lower part of the plastic support disc has a protective shell); Figure 9 is the structure diagram of the stainless steel water-cooled motor of the invention, the large end of the shell is downward, and the motor is provided with a flange; Figure 10 is the structure diagram of the stainless steel water-cooled motor of the invention (the inner part and the outer ring-shaped part are welded into the lower bearing); Figure 11 is the structure diagram of the stainless steel water-cooled motor of the invention (the inner part and the outer ring-shaped part are welded into the lower bearing); Figure 12 is the structure diagram of the stainless steel water-cooled motor of the invention (the inner part and the outer ring-shaped part are welded into the lower bearing); Figure 13 is the three-dimensional structure diagram of the two-stage reduction reduction gearbox shell of the invention; Figure 14 is the three-dimensional structure diagram of the two-stage reduction reduction gearbox shell of the invention; Figure 15is a perspective view of the support plate of the present application; Figure 16 is one of the perspective views of the support plate with skirt of the present application; Figure 17 is one of the perspective views of the support plate with skirt of the present application; Figure 18 is one of the perspective views of the support plate with skirt of the present application; Figure 19 is one of the perspective views of the circular ring impeller of the present application; Figure 20 is one of the perspective views of the circular ring impeller of the present application; Figure 21 is one of the perspective views of the circular ring impeller of the present application (connectable with the flange of the output shaft); Figure 22 is one of the perspective views of the circular ring impeller of the present application (connectable with the flange of the output shaft); Figure 23 is the perspective view of the impeller body of the present application with the inner floating body arranged therein; Figure 24 is the perspective view of the inner floating body of the present application; Figure 25 is the perspective view of the blade of the present application; Figure 26 is the sectional view of the conical impeller of the present application; Figure 27 is the perspective view of the conical impeller of the present application; Figure 28 is the perspective view of the conical impeller of the present application; Figure 29 is the structural view of the stainless steel water-cooled motor and the planetary gear reduction box with outer rotor of the present application (the planetary gear frame is arranged below the lower bearing seat); Figure 30 is the structural view of the stainless steel water-cooled motor and the planetary gear reduction box with outer rotor of the present application (the planetary gear frame is fixed on the support plate); Figure 31 is the structural view of the stainless steel water-cooled motor and the planetary gear reduction box with outer rotor of the present application (the planetary gear frame is fixed in the plastic support plate, and the support plate is embedded with a metal plate); Figure 32 is the perspective view of the support plate of the present application; Figure 29 is the perspective view of the support plate of the present application; Figure 33 is the perspective view of the support plate of the present application; Figure 31 is the perspective view of the support plate of the present application; Figure 34 is the perspective view of the stainless steel water-cooled motor of the present application; Figure 35 is the internal structural view of the planetary gear reduction box of the present application; Figure 36 is the perspective sectional view of the inner gear ring and the cover of the present application; Figure 37 is the perspective view of the upper protective shell of the present application; Figure 38 is the perspective view of the support plate of the planetary gear reduction box of the present application; Figure 39 is the perspective view of the support plate of the planetary gear reduction box of the present application; Figure 40 is the perspective view of one of the brackets of the present application; Figure 41 is the perspective view of one of the brackets of the present application; Figure 42 is the perspective view of one of the brackets of the present application; Figure 43 is the perspective view of one of the brackets of the present application; Figure 44is a perspective view of one of the cradles of the present invention; Figure 45 is a perspective view of one of the cradles of the present invention; Figure 46 is a perspective view of the split body floating body structure of the present invention; Figure 47 is a perspective view of the height adjustment of the split body floating body support pole of the present invention; Figure 48 is a perspective view of one of the split body floating body support pole assemblies of the present invention; Figure 49 is a perspective view of one of the split body floating body support pole assemblies of the present invention; Figure 50 is a perspective view of the whole body floating body of the present invention; Figure 51 is a perspective view of the impeller type oxygenator of the present invention with the whole body floating body; Figure 52 is a perspective view of the impeller type oxygenator of the present invention with the split body floating body.

[0018] In the figure: 1-motor; 2-planetary reduction unit; 3-impeller; 4-supporting rod; 5-hollow casing; 6-carriage; 7-bottom plate; 8-mounting position of supporting rod; 9-flange of motor; 10-hole connected with top of hollow casing; 11-two side plates of carriage; 12-outer annular ring; 13-vane; 14-upper section of vane; 15-lower section of vane; 16-water passing hole; 17-outlet wire sealing device; 18-inner annular ring; 19-reflecting plate; 20-reinforcing strip; 21-motor stator; 22-motor rotor; 23-motor shaft; 24-motor winding; 25-upper bearing seat; 26-sealing cover; 27-upper bearing; 28-lower bearing; 29-nut; 30-upper retainer ring; 31-motor housing; 32-lower bearing seat; 33-stud; 34-connecting plate; 35-screw; 36-supporting disc; 37-sealing member; 38-lid; 39-bearing; 40-upper protective casing; 41-lower protective casing; 42-sealing ring; 43-O-shaped sealing ring; 44-horizontal plane; 45-supporting plate; 46-hole; 47-anchoring body; 48-hole connecting impeller; 49-fastener; 50-junction box; 52-through hole; 53-sun gear; 54-planetary gear; 55-bearing; 56-shaft; 57-planetary gear carrier; 58-bolt; 59-inner ring gear; 60-bolt; 61-bolt; 62-bolt; 63-sealing member; 64-locking screw; 65-bolt; 66-O-shaped ring; 67-recess; 68-bolt; 72-box; 73-positioning stop; 74-connecting position; 75-connecting hole; 76-flange connecting position; 77-screw hole; 78-screw hole; 79-stop; 80-annular ring; 81-flange; 85-connecting hole; 86-water flow hole; 87-waterproof ring; 88-annular ring; 89-connecting plate; 90-anti-rotation frame; 91-connecting hole; 92-connecting position; 93-through hole; 94-screw; 96-oil plug hole; 97-screw hole; 98-connecting position; 99-upper bearing chamber; 100-stud; 101-nut; 102-pressing plate; 103-metal plate; 104-bolt; 106-lower retainer ring; 107-impeller inner floating body; 108-fixing hole; 109-stud; 110-lower plastic protective casing; 111-upper plastic protective casing; 112-positioning column; 113-clasp spring for hole; 114-sealing member; 115-protective casing; 116-O-shaped sealing ring; 117-screw; 118-fixing hole; 119-through hole; 120-O-shaped sealing ring; 121-O-shaped sealing ring; 122-O-shaped sealing ring; 123-screw; 124-nut; 125-bearing chamber; 126-large end; 127-flange; 128-primary driving pinion; 129-first-stage driven gear; 130-second-stage primary driving pinion; 131-second-stage driven gear; 132-upper bearing; 133-lower bearing; 134-output shaft; 135-framework oil seal; 136-flange; 137-mechanical seal; 138-supporting disc; 139-motor connecting position; 140-screw hole;141-connection site; 142-filling port; 143-skirt; 144-bearing baffle; 145-positioning circle; 146-nut hole; 147-waterproof cover; 148-screw plug; 149-annular plate; 150-O-ring groove; 151-integral float; 152-segmented float; 153-bolt; 154-inner part; 155-outer annular part; 156-bearing chamber; 157-seal chamber; 158-connection hole; 159-bolt; 160-O-ring groove; 161-O-ring; 162-welding; 163-small end; 164-positioning boss; 165-stainless steel reinforcing cover; 166-positioning ring; 167-positioning circle; 168-mating stop; 169-outer circle; 170-screw hole; 171-positioning circle; 172-large hole; 173-supporting rod mounting site; 174-screw hole; 175-handles; 177-hole; 178-reinforcing pad; 179-limiting device; 181-conical body; 182-blade; 183-fixing plate; 184-upper supporting plate; 185-lower supporting plate; 186-water passing window; 187-window; 188-reinforcing rib; 189-window; 190-axis line. DETAILED DESCRIPTION

[0019] The application will be further described in connection with the drawings in which Figures 1-52 :

[0020] A impeller type oxygenator mainly comprises a motor 1, a supporting disc 138, a speed reducer, a float, a supporting rod 4 and an impeller 3. The motor 1 drives the impeller 3 through the speed reducer, and the whole machine floats on the water surface by the float. When working, the motor 1 drives the impeller 3 to rotate to increase oxygen, and the water splashed by the rotation of the impeller 3 cools the motor 1. Figure 52

[0021] The motor 1 is provided with the supporting disc 138 connected with the supporting rod. The supporting disc 138 covers the speed reducer and is sealingly connected with the box 72 of the speed reducer. The supporting disc 138 is provided with the connection site 141 connected with the supporting rod 4 and the fixing hole 118. The inner end of the supporting rod 4 is connected with the supporting disc 138 and is fastened by the bolt. The outer end of the supporting rod 4 is connected with the float, and the whole machine floats on the water surface by the float. The supporting rod 4 can be made of circular or rectangular metal pipe. The float comprises the integral float 151 or the segmented float 152. When working, the motor drives the impeller to rotate to increase oxygen through the speed reducer. The supporting disc 138 can be injection molded or aluminum alloy die cast. Figure 1

[0022] ​​The box body of the reduction gearbox can be cast into shape, and a positioning stop 73 can be arranged on the inner side of the upper end port of the box body 72. A reduction gear is arranged in the box body 72, which comprises a two-stage reduction structure. The driving pinion 128 of the two-stage reduction structure is arranged on the motor shaft 23 to drive the first driven gear 129. The first driven gear 129 is coaxial with the second driving pinion 130. The second driving pinion 130 drives the second driven gear 131, which is arranged on the output shaft 134. The second driving pinion 130 is provided with an upper bearing 132 and a lower bearing 133 at both ends of the shaft. The upper bearing 132 is arranged in the upper bearing chamber 99 of the upper end port of the box body. The lower bearing 133 is arranged in the lower bearing chamber of the bottom of the box body. The output shaft 134 and the positioning stop 73 of the upper end of the box body 72 are on the same axis line 190, that is, the motor shaft 23 and the output shaft 134 are on the same axis line after the motor and the reduction gearbox are assembled, which can prevent or reduce the eccentric weight. The output shaft 134 is sealed by a mechanical seal 137 or a skeleton oil seal 135 and extends downward. During operation, the output shaft 134 drives the impeller 3 to rotate (see Figures 1-5 ).

[0023] The motor comprises a water-cooled motor. The motor housing 31 can be made of stainless steel. The stator 21 and the rotor 22 are arranged in the motor housing 31. The upper end of the motor shaft 23 is arranged in the upper bearing 27 of the upper bearing seat 25. The lower end of the motor shaft 23 is arranged in the lower bearing 28 of the lower bearing seat 32. The lower bearing seat 32 is connected to the support disc 138. A sealing ring is arranged between the lower bearing seat 32, the support disc 138, and the motor housing 31 (see Figure 3 ).

[0024] The support disc 138 can be made of plastic and is provided with a positioning circle 145 connected to the box body of the reduction gearbox. The positioning circle 145 is fitted in the positioning stop 73 of the box body of the reduction gearbox. The support disc 138 is tightly fastened with the port of the box body of the reduction gearbox. A metal plate 103 can be arranged on the support disc 138 to prevent plastic deformation. The metal plate 103 can be stamped from a stainless steel plate. The stainless steel plate can be a whole or multiple pieces connected into one. The metal plate 103 can be embedded in the plastic (see Figure 3 ).

[0025] The motor housing 31 of the water-cooled motor is made of stainless steel, and the upper end of the motor housing 31 is sealable. The lower end of the motor housing 31 is provided with a lower bearing seat 32, and the lower bearing seat 32 is connected with a supporting disc 138. A sealing structure is arranged between the lower bearing seat 32, the supporting disc 138 and the motor housing 31. The sealing structure comprises an O-shaped sealing ring 43 arranged in an O-shaped sealing ring groove formed by the lower bearing seat 32 and the supporting disc 138. The O-shaped sealing ring groove comprises a stepped shape formed by the lower end of the outer cylindrical surface of the lower bearing seat 32 matched with the motor housing 31, and the small end 163 of the stepped shape has the same diameter as the bottom diameter of the O-shaped sealing ring groove. The lower surface of the lower bearing seat 32 is connected with the upper surface of the supporting disc 138, and the connection between the upper surface of the supporting disc 138 and the lower bearing seat 32 can be fastened by screws 35. The connection between the upper surface of the supporting disc 138 and the lower bearing seat 32 can be provided with a positioning boss 164 having the same diameter as the outer cylindrical surface of the lower bearing seat. The positioning boss 164 is matched with the lower bearing seat 32 and the O-shaped sealing ring 43 in the motor housing 31 (see Figure 4 ).

[0026] The motor housing 31 of the water-cooled motor is made of stainless steel, and the upper end of the motor housing 31 is sealable. The lower end of the motor housing 31 is provided with a lower bearing seat 32, and the lower bearing seat 32 is connected with a supporting disc 138. A sealing structure is arranged between the lower bearing seat 32, the supporting disc 138 and the motor housing 31. The sealing structure comprises an O-shaped sealing ring 43 arranged in an O-shaped sealing ring groove formed by the lower bearing seat 32 and the supporting disc 138. The O-shaped sealing ring groove comprises a stepped shape formed by the lower end of the outer cylindrical surface of the lower bearing seat 32 matched with the motor housing 31, and the small end 163 of the stepped shape has the same diameter as the bottom diameter of the O-shaped sealing ring groove. The lower surface of the lower bearing seat 32 is connected with the upper surface of the supporting disc 138, and the connection between the upper surface of the supporting disc 138 and the lower bearing seat 32 can be fastened by screws 35. The connection between the upper surface of the supporting disc 138 and the lower bearing seat 32 can be provided with a positioning boss 164 having the same diameter as the outer cylindrical surface of the lower bearing seat. The positioning boss 164 is matched with the lower bearing seat 32 and the O-shaped sealing ring 43 in the motor housing 31 (see Figure 3 ).

[0027] The upper and lower bearings are respectively arranged in the upper bearing seat 25 and the lower bearing seat 32. The upper bearing seat 25 is arranged at the large end 126 of the stepped motor housing by step positioning, and the lower bearing seat 32 is formed by casting. The outer circle of the lower bearing seat is connected with an outer annular member 155 formed by punching a hole in a stainless steel plate and an O-shaped sealing ring 161, so that the casting is not in contact with seawater outside to prevent rust (see Figure 1 ).

[0028] The water-cooled motor can be made of a thin-walled stainless steel pipe cut into a required length to form a motor shell 31, the motor shell 31 is internally provided with a stator 21, the upper end and the lower end of the stator 21 are respectively provided with a retainer ring, the upper retainer ring 30 is provided with an upper bearing seat 25, the lower retainer ring 106 is provided with a lower bearing seat 32, the lower retainer ring 106 can be welded to the motor shell 31, the retainer ring can also increase the strength of the stainless steel pipe, and the lower end of a stud 33 is fixed in a threaded hole 170 of the lower bearing seat 32, the upper end of the stud 33 is connected to the upper bearing seat 25 and fastened by a nut 29, the lower bearing seat 32 is positioned by the lower retainer ring 106 welded to the motor shell 31 and cannot move upward, that is, the support disc 138 is not stressed after the stud 33 is fastened. The upper bearing seat 25 and the motor shell 31 are internally provided with an O-shaped sealing ring 120, the upper end surface of the motor shell 31 and the upper bearing seat 25 are provided with an O-shaped sealing ring 121, and the O-shaped sealing ring 121 is externally provided with a sealing cover 26. The sealing cover 26 can be provided with a terminal box 50, and the terminal box 50 can be integrated with the sealing cover 26 (see Figure 4 ).

[0029] The terminal box seat is provided with a terminal, the lead-out wire of the stainless steel motor winding is connected to the terminal after being sealed, and the power supply wire is introduced from the lower part of the terminal box seat and connected to the terminal by the user. The terminal box seat is provided with a terminal box cover. The terminal box 50 includes a large terminal box in which a capacitor can be accommodated, or a small terminal box without a capacitor (see Figures 3-4 ).

[0030] The lower bearing seat 32 can be connected to the support disc 138, the lower bearing seat 32 can be made of metal, the lower end of the lower bearing seat 32 is provided with a step, the step and the plane of the support disc form a sealing ring groove, and the sealing ring groove is provided with an O-shaped sealing ring 43; the lower bearing seat 32, the support disc 138 and the stainless steel motor shell 31 are sealed, the positioning boss 164 of the support disc enters the stainless steel motor shell, and the lower bearing seat made of cast aluminum or cast iron does not contact seawater to prevent rust (see Figure 4 ).

[0031] The box body 72 of the reduction gearbox is cast, the outer side of the box body 72 of the reduction gearbox is provided with a protective shell made of corrosion-resistant material, the protective shell 115 is connected to the support disc 138 to cover the reduction gearbox (see Figures 1-3 ), or the periphery of the support disc 138 is downwardly provided with a skirt 143 having a water-proof function, the above-mentioned protective shell 115 can prevent water splashed by the impeller from splashing on the box body of the reduction gearbox (see Figure 4 ), which can improve the service life of the box body of the reduction gearbox.

[0032] The output shaft of the reduction gearbox extends downward from the protective shell 115 after being sealed with the gearbox housing. The protective shell 115 can be formed by plastic injection molding and closely combined with the outer shape of the gearbox housing 72. The upper opening of the protective shell 115 is connected with the support disc 138. A sealing chamber is arranged between the lower end of the protective shell 115 and the output shaft 134. A mechanical seal 137 or a skeleton oil seal 135 is arranged in the sealing chamber. A stainless steel reinforcing cover can be arranged on the outer shell of the sealing chamber. The sealing between the lower end of the protective shell and the output shaft can more effectively prevent the gearbox housing 72 from rusting, further improving the service life (see Figure 2 ).

[0033] The motor housing 31 of the water-cooled motor can be made of a thin-walled stainless steel pipe cut to the required length. The stainless steel motor housing 31 can be arranged in a stepped shape, with a step formed between the large end 126 and the small end. The large end 126 is upward, and the upper bearing seat is axially positioned by the step in cooperation with the large end (see Figures 1-3 ). Or the large end 126 is downward, and the lower bearing seat is axially positioned by the step in cooperation with the large end. The retaining ring can be fixedly connected with the stainless steel motor housing 31, including welding (see Figure 5 ).

[0034] The stainless steel motor housing 31 can be arranged in a stepped shape, with a step formed between the large end and the small end. The large end 126 is reversed to form a flange 127. A plurality of connecting holes are arranged on the flange 127. The flange 127 can be installed downward, and the motor shaft 23 of the motor extends from the lower bearing seat 32. The plurality of connecting holes on the flange 127 are the connecting holes of the motor and the support disc 138 (see Figure 5 ), or the connecting holes of the motor and the upper plane of the gearbox housing. The upper bearing seat 25 and the lower bearing seat 32 can be fastened by studs 33. The upper end of the stud 33 is fixed in the screw hole 170 of the upper bearing seat 25. The lower end of the stud passes through the lower bearing seat 32 and is fastened by a nut 29 (see Figure 9 ).

[0035] The upper bearing seat can be provided with an O-shaped sealing ring groove, and an O-shaped sealing ring 120 is arranged in the O-shaped sealing ring groove. The step of the upper bearing seat 25 is sealed with the upper end surface of the stainless steel motor housing. That is, after the upper bearing seat 25 is positioned by the upper retaining ring 30, the step of the upper bearing seat and the upper end surface of the stainless steel motor housing become an O-shaped sealing ring groove, and an O-shaped sealing ring 121 is arranged in the O-shaped sealing ring groove. The outer circle of the O-shaped sealing ring on the upper end surface of the stainless steel motor housing 31 can be provided with a sealing cover 26. The sealing cover 26 can be formed by deep drawing of stainless steel sheet. The sealing cover 26 can also be integrated with the terminal box seat of the terminal box. (see Figure 4 or 9) The sealing cover 26 can also be integrated with the motor housing 31 by welding to eliminate the sealing ring.

[0036] The lower bearing seat can be combined with the outer ring 155 punched and formed by stainless steel plate, which is arranged on the box 72 of the reduction gearbox; the outer ring 155 can be enlarged, that is, the enlarged motor of the outer ring 155 is fastened on the box of the reduction gearbox by the fasteners passing through the support rods 4, (see Figure 8 ) A sealing gasket can be arranged between the outer ring 155 and the box 72 of the reduction gearbox.

[0037] The lower end of the motor housing 31 is connected with the combined end cover, which is equivalent to the lower bearing seat 32; the combined end cover includes the inner part 154 formed by ordinary steel plate and the outer ring 155 formed by stainless steel plate. The processing method of the inner part 154 includes blanking or cutting to generate a blank, and a reverse hole in the middle of the blank or stretching to generate a bearing chamber 156, and a sealing member chamber 157 can be arranged below the bearing chamber 156; the outer ring 155 refers to a stainless steel part that can be in contact with seawater during work, and the processing method includes blanking or cutting to generate a blank, and a reverse hole in the blank becomes a positioning ring of the box of the reduction gearbox, and the outer circle of the stainless steel part can be lowered to improve the rigidity. The inner part 154 and the outer ring 155 can be welded, and the inner circle of the bearing chamber, the inner circle of the sealing member chamber, and the outer circle matched with the lower end of the motor housing 31 can be finished (see Figure 11 ).

[0038] The lower end of the stainless steel motor housing 31 and the outer ring 155 of the stainless steel part of the combined end cover can be welded as a whole, which saves the trouble of arranging sealing members and fasteners. The outer ring 155 of the combined end cover is provided with a plurality of connecting holes connected with the box of the reduction gearbox (see Figure 2 ).

[0039] The inner part 154 of the combined end cover can be provided with a stud 33 connected and fastened with the upper bearing seat 25; or the lower end of the stainless steel motor housing 31 and the outer ring of the combined end cover are welded as a whole, and the upper bearing seat 25 can be axially positioned by the sealing cover 26 arranged at the upper end.

[0040] The periphery of the support disc 138 can be downwardly provided with a connecting site 141 and a connecting hole for mounting the support rod 4, and the support rod 4 is not less than three, the inner end of the support rod 4 is connected with the support disc 138, and the outer end is connected with the floating body, and the whole machine floats on the water surface to work; the floating body includes a whole floating body 151 or a split floating body 152, the whole floating body 151 includes a blow-molded flat hollow body, a large hole is arranged in the middle of the hollow body, and the motor and the reduction gearbox are arranged in the large hole in the middle of the whole floating body and are connected and fixed by the support rod 4 (see Figure 51 ); or the split floating body 152 includes a blow-molded spherical or rectangular hollow body, and each of not less than three floating bodies is arranged at the outer end of the support rod 4 (see Figure 52 ).

[0041] The supporting disc 138 is injection molded, the upper surface of the plastic supporting disc is provided with a boss matched with the motor housing 31, the lower surface of the plastic supporting disc is provided with a positioning circle 145 matched with the reduction gearbox and a bearing stop ring 144, the positioning circle 145 of the plastic supporting disc is tightly fixed by a bolt after being tightly matched with the reduction gearbox. The periphery of the plastic supporting disc is provided with three connecting positions and connecting holes of the supporting rods. The upper surface of the supporting disc is provided with an oil filling port 142 and a positioning ring 166. The oil filling port 142 is larger than the oil filling port of the reduction gearbox, the plug 148 of the oil filling port of the reduction gearbox can be taken out from the oil filling port 142 of the supporting disc, and the positioning ring 166 is externally provided with a waterproof cover 147 to prevent water from entering the gearbox 72 through the air hole of the plug 148. The supporting disc 138 can be circular or polygonal. The inside of the supporting disc 138 can also be provided with a bearing stop ring 144 for axially positioning the upper bearing. Figures 15-18 ).

[0042] The plastic supporting disc can be embedded with a metal plate. The metal plate is provided with a plurality of through holes. The metal plate is pre-positioned in the mold during injection molding, and the plastic is injected to wrap the outer surface of the metal plate. The plastic on both surfaces is connected into one body by the plastic in the plurality of through holes. The metal plate can be a stainless steel plate or an iron plate. The hole diameter of the metal plate at the connecting hole position of the connecting hole of the other part of the plastic supporting disc embedded with the iron plate is larger than the required hole diameter of the plastic supporting disc. The hole of the supporting disc after injection molding is also wrapped with the iron plate by the plastic to prevent rusting. Figure 3 ).

[0043] The plastic supporting disc 138 can be provided with a hole 177 through which the motor positioning circle 167 passes. The motor positioning circle 167 is matched with the open positioning stop 73 of the reduction gearbox body. The motor, the plastic supporting disc and the reduction gearbox can be connected and tightly fixed by a bolt. The supporting rod 4 can be arranged on the upper surface of the supporting disc 138 and can be tightly fixed by a bolt, or the supporting rod 4 can be arranged in the groove below the supporting disc 138 and can be tightly fixed by a bolt. Figure 1 and Figure 15 ).

[0044] The reduction gearbox body 72 can be cast, the outer side of the reduction gearbox body 72 can be provided with a protective shell 115 made of corrosion-resistant material, and the output shaft of the reduction gearbox extends downward after being sealed by a sealing mechanism. The protective shell 115 can be injection molded, and the protective shell is provided with an inner cavity substantially the same as the outer shape of the body. The protective shell can be fitted on the outer surface of the body from below, and the upper opening of the protective shell 115 is connected with the supporting disc 138. Figures 1-2 ).

[0045] The sealing of the output shaft 134 can be arranged between the protective shell 115 and the output shaft 134, the protective shell 115 is formed by injection molding, the upper opening of the protective shell 115 is connected with the support plate, the lower end of the plastic protective shell is provided with a sealing chamber, the sealing chamber is provided with a mechanical seal 137 or a skeleton oil seal 135, and the sealing chamber shell is provided with a stainless steel reinforcing cover 165. The sealing mechanism can also be arranged between the output shaft and the box body, and the protective shell 115 is arranged outside the sealing mechanism (see Figure 2 ).

[0046] The motor includes a permanent magnet synchronous motor, the rotor of the permanent magnet synchronous motor is provided with a magnetic steel, the driver of the permanent magnet synchronous motor includes a speed regulation function or does not include a speed regulation function, and the driver is arranged on the stainless steel motor. The water splash when the impeller works cools the driver and the motor.

[0047] The impeller 3 includes a conical impeller and a circular ring impeller, the circular ring impeller includes a connecting position arranged on the annular ring 88 and connected with the output shaft of the oxygenator, the connecting position is concave in the middle, and the lower concave position is provided with a connecting hole 91 connected with the flange of the output shaft of the oxygenator; the annular ring is connected with a plurality of blades 13, the blades have curved working surfaces, the upper section of the blades is provided with a water passing hole 16, and the lower section of the blades can be provided without the water passing hole.

[0048] The circular ring impeller body is provided with a hollow impeller inner floating body 107, the hollow impeller inner floating body is blow molded, and the impeller inner floating body 107 is provided with a fixing hole 108 corresponding to the through hole 93 and is fixed in the circular ring impeller body by a fastener (see Figures 22-24 ).

[0049] The circular ring impeller includes an annular ring 88 and blades 13, the annular ring 88 is provided with a connecting position connected with the output mechanism of the oxygenator motor, the annular ring 88 is connected with a plurality of blades 13, the working surface of the blade 13 is a curved surface, and the blade is similar to a boat parking propeller, the upper section of the blade is provided with a water passing hole 16, and the lower section of the blade is a smooth curved surface without the water passing hole. The water passing hole 16 includes a circular and non-circular water passing space arranged on the blade. When the impeller 3 rotates, the lower section 15 of the blade is basically below the water surface, the smooth curved surface drives a large amount of water to rise, the rising water is scattered at the water passing hole 16 or the water passing groove position, a part of the water continues to rise and falls, a part of the water passes through the water passing hole 16 or the water passing groove and enters the back of the impeller, and the back of the impeller is further scattered by the reflecting plate 19 arranged below the support plate, so that the water particles and water mist increase the contact area with the air oxygen, and the oxygenation effect is improved (see Figures 21-22 or Figure 25 ).

[0050] The connecting position of the annular ring 88 includes a connecting plate 89 arranged on the annular ring, a lower recess is arranged in the middle of the connecting plate 89, and a connecting hole 91 and a connecting position 92 of a flange 136 of an output shaft 134 of the oxygenator are arranged in the lower recess; the impeller 3 is integrally injection molded. The connecting position 92 of the flange 136 can be provided with an anti-rotation frame 90, and the shape of the output shaft flange 136 is consistent with the inner shape of the anti-rotation frame 90, which can improve the torque transmission capacity. The inner shape of the anti-rotation frame 90 includes a triangular or square non-circular shape. The anti-rotation frame 90 is internally provided with a connecting hole 91 for fixing the flange (see Figures 21-22 ).

[0051] The connecting plate of the impeller 3 is composed of an annular plate 149, and a plurality of connecting holes 91 for connecting the outer rotor are arranged on the annular plate 149 (see Figures 19-20 ).

[0052] The conical impeller is mainly composed of a conical body 181, a blade 182, a fixing plate 183, an upper support plate 184, a lower support plate 185, etc. The fixing plate 183 is provided with a connecting hole 91, which can be fixed on the flange 136 of the oxygenator by bolts. The fixing plate 183 is connected to the conical body 181 through the upper support plate 184 and the lower support plate 185. The outer conical surface of the conical body 181 is connected to a plurality of blades 182. The back surface B of the blade is supported by a reinforcing rib 188. A window 187 is arranged in the space of the reinforcing rib 188. The lower surface of the upper support plate 184 is provided with a water passing window 186. The window 186 is designed for the structure of the mold, which has the beneficial effect of making the water in the conical body 181 flow outward through the window, increasing the water exchange capacity and improving the oxygenation efficiency. The upper support plate 184 and the lower support plate 185 have a small cross section in the direction of rotation, which can reduce water resistance during rotation and make the product firm. The small end of the conical body 181 can be provided with a grid-shaped grid to prevent debris, fish and shrimp from entering the impeller body (see Figures 26-28 ).

[0053] The bolt 153 of the flange can be pre-installed in the connecting position 92 of the flange above the floating body 107 in the impeller. The lower end of the connecting hole 91 can be provided with a hexagonal cavity, which is matched with the head of a hexagonal bolt to prevent the bolt from rotating with the nut when tightening the nut (see Figure 23 ).

[0054] The motor includes air-cooled motor and water-cooled motor, the motor housing 31 of the water-cooled motor is made of stainless steel, the upper end of the motor housing 31 is sealed, the lower end of the motor housing is provided with a lower bearing seat 32, and the lower bearing seat is connected with a support disc 138. An O-shaped sealing ring 43 is arranged between the lower bearing seat 32, the support disc 138 and the stainless steel motor housing 31. A waterproof skirt 143 is arranged on the periphery of the support disc downward. A connecting hole for mounting a support rod 4 is arranged on the support disc, the support rod is not less than three, the inner end of the support rod 4 is connected to the support disc 138, and the outer end is connected to a floating body, and the whole machine floats on the water surface to work. The support disc 138 is provided with a positioning circle 145 connected with a reduction box shell, the positioning circle 145 is matched with a positioning stop 73 of the reduction box shell 72, and the support disc 138 and the positioning stop 73 of the reduction box shell 72 are sealed. The sealing includes that the O-shaped ring is arranged in the O-shaped sealing ring groove 150 of the support disc. The support disc 138 can be injection molded by plastic, the support disc is arranged on the reduction box shell 72, the support rod arranged on the support disc 138 can be fastened by a stud 100, the stud 100 is arranged on the shell 72, and the shell 72 and the support disc 138 are fastened by a nut 101, the support rod presses the plastic support disc, and the plastic deformation can be effectively prevented by another nut fastening (see Figures 4-5 or Figures 7-8 ).

[0055] The support rod 4 can be a rectangular tube, the inner end of each of the three support rods 4 is provided with two connecting holes, the connecting holes are respectively fixed on six screw holes arranged at the mouth of the reduction box shell by bolts, the three support rods form a triangle, the shell of the motor is inside the triangle, and the outer end of the three support rods 4 is provided with a floating body to make the oxygenator float on the water surface (see Figures 7-8 ).

[0056] The connecting lines of the rectangular support rods arranged around the water-cooled motor 1 form a substantially equilateral triangle, the extension direction of the rectangular support rods can match the rotation direction of the impeller, the water-facing surface of the rectangular support rods can reflect the water splashes generated by the rotation of the impeller to cool the motor, and the trouble of arranging a water reflection plate required by the existing water-cooled impeller type oxygenator is avoided, the extension direction of the support rod can be limited by a limiting device 179 arranged at the connecting position 141 of the support disc to limit the position and extension direction of the support rod, (see Figures 6-7 ) to prevent the support rod from being installed reversely and reduce the reflection ability of the water splashes. If the impeller rotates counterclockwise, the outer end of the rectangular support rod 4 arranged around the water-cooled motor extends clockwise (see Figure 52 ).

[0057] The floating body includes a whole floating body 151 or a split floating body 152. The whole floating body includes a blow-molded flat hollow body, a large hole 172 is arranged in the middle of the hollow body, and the motor and the reduction mechanism are arranged in the large hole 172 in the middle of the whole floating body and are fixed by a support rod 4. Or the split floating body includes a blow-molded spherical or circular hollow body, and each of the floating bodies is arranged at the outer end of the support rod (see Figures 51-52 ).

[0058] The split floating body of the oxygenator can be composed of a hollow shell 5 and a connecting mechanism. The hollow shell 5 is blow-molded by plastic. The connecting mechanism includes a bracket 6 arranged on the hollow shell and a connecting hole. The bracket can be made of metal or plastic. The bracket can be provided with a mounting position 8 of a circular or semicircular or square support rod to adapt to a square or circular support rod 4. Or the connecting mechanism includes a bolt 68 prearranged on the hollow shell. The bolt 68 is matched with the hole of the support rod and is fastened by a nut. Or a nut is prearranged on the hollow shell. The bolt is fastened by the hole of the support rod and the prearranged nut (see Figures 40-49 ).

[0059] The bracket includes a bottom plate 7 and two side plates 11 of the bracket. The two side plates 11 of the bracket are provided with holes 46 connected with the support rod 4. The bottom plate 7 is provided with a hole 10 connected with the hollow shell. The bracket is fixed on the top of the hollow shell by a bolt or a nut. The support rod is installed in the mounting position 8 of the bracket and is fastened by a bolt. The support rod 4 can be made of a metal pipe. The metal pipe includes a rectangular pipe or a circular pipe.

[0060] The bracket 6 can be injection-molded by plastic compatible with the hollow shell. The bottom plate 7 can be provided with an anchoring body 47. The anchoring body 47 is embedded in the top of the hollow shell 5 when blow-molded.

[0061] The hollow shell 5 can be arranged as a cuboid. The edges and corners of the cuboid are smoothly transitioned. The bottom surface of the floating body is concave upward. The concave cavity 67 of the upward concave bottom surface can accommodate the bracket 6 of another floating body, so as to reduce the packaging and storage volume.

[0062] The two side plates 11 of the bracket can be provided with two groups or more groups of connected holes 46. Different heights of the holes 46 can adjust the water inlet depth of the impeller of the oxygenator.

[0063] The impeller type oxygenator includes a motor and an outer rotor planetary gear reduction mechanism, which can prevent or reduce the weight deviation of the oxygenator. The motor and the reduction mechanism are connected with the floating body by the support rod. The whole machine floats on the water surface by the floating body. When working, the motor drives the impeller to rotate to increase oxygen (see Figure 51 ).

[0064] The outer rotor planetary gear reduction mechanism mainly includes a motor 1 and a planetary reduction part 2. The motor mainly includes a rotor 22, a stator 21, a motor housing 31, an upper bearing 27, and a lower bearing 28. The planetary reduction part mainly includes an inner ring gear 59, a plurality of planetary gears 54, and a middle sun gear 53. The motor shaft 23 is rotatably supported by the upper bearing 27 and the lower bearing 28. The upper bearing 27 and the lower bearing 28 are respectively installed in the bearing chambers of the upper bearing seat 25 and the lower bearing seat 32. The lower end of the motor shaft 23 extends downward, and the extended end is connected with the sun gear 53. In operation, the sun gear of the motor shaft drives the planetary gears 54. The planetary gears are internally provided with bearings 55. The shafts 56 of the plurality of planetary gears are arranged on the same planetary gear carrier 57, which includes an integral structure of the shaft 56 and the planetary gear carrier 57. The planetary gear carrier 57 is fixed to the motor lower bearing seat 32 and does not rotate. The inner ring gear 59 is connected with a cover 38. The cover is provided with a bearing 39. The inner circle of the bearing is directly or indirectly connected to the lower bearing seat 32 of the motor. The planetary gears 54 are driven by the sun gear 53 to rotate the inner ring gear 59, the cover 38, and the protective shell at a low speed. The low-speed rotating part is the outer rotor (see Figure 29 ).

[0065] The motor matched with the outer rotor planetary gear reduction mechanism includes an air-cooled motor and a water-cooled motor. The motor housing 31 of the water-cooled motor is made of stainless steel, and the upper end of the motor housing 31 is sealed. The lower end of the motor housing is provided with a lower bearing seat 32, and the lower bearing seat is connected with a support disc 36. O-shaped sealing rings 43 are arranged between the lower bearing seat 32, the support disc 138, and the stainless steel motor housing 31. The periphery of the support disc 36 can be provided with a skirt 143 for waterproofing. The outer rotor is provided with a plurality of connecting impeller holes 48 or studs 109 connected with the annular plate 149.

[0066] A motor and outer rotor planetary gear speed reduction mechanism, mainly comprising a motor and a planetary speed reduction mechanism, the motor comprising a forced air cooled motor or a water cooled motor, the motor shaft 23 extending downward and provided with a sun gear 53, the planetary speed reduction mechanism mainly comprising an inner ring gear 59, a plurality of planetary gears 54 and a sun gear 53 in the middle, the sun gear 53 driving the planetary gears 54 in operation, the planetary gears 54 provided with bearings 55, the shafts 56 of the plurality of planetary gears 54 arranged on the same planetary gear carrier 57, the planetary gear carrier 57 fixed to the non-rotating middle part of the support disc 138, the inner ring gear 59 connected to the cover 38 or the inner ring gear and the cover provided as a whole, the cover 38 provided with bearings 39 and the planetary gear carrier 57 rotatingly connected, the motor provided with a flange 9 connected to the support disc 138, the same planetary speed reduction mechanism used to conveniently replace motors and impellers of different powers to become oxygenators of different powers, the support disc 138 injection molded, a metal plate 103 provided in the plastic support disc 36 to improve the strength of the plastic support disc 36, the metal plate 103 embedded in the plastic support disc 36 during injection molding (see Figures 30-31 ).

[0067] The outer rotor planetary gear reduction mechanism, the cover 38 and the outer side and lower part of the inner ring 59 are provided with a protective shell; the protective shell is made of corrosion-resistant material, including stainless steel or plastic, and the protective shell is a sealed structure to prevent the outer rotor from rusting. The sealing structure includes a seal 37 between the protective shell and the planetary gear carrier 57. The protective shell mainly includes an upper protective shell 40 and a lower protective shell 41, and the upper end of the upper protective shell 40 is provided with a port ring 80 which can extend upward into the waterproof ring 87 provided at the lower end of the motor to become a labyrinth seal. Under the protection of the waterproof ring 87, rainwater and water splashes from the impeller cannot enter the protective shell. Further, a seal 37 can be provided between the port ring 80 and the planetary gear carrier 57, or a seal 37 can be provided between the port ring 80 and the waterproof ring to achieve better waterproof effect. The lower protective shell 41 is sealed and connected to the upper protective shell 40, and the protective shell rotates together with the inner ring 59 during operation. The upper protective shell 40 and the lower protective shell 41 can be formed into a rotating body with a flange 81 by stamping and deep drawing of stainless steel sheet material, and the flange 81 is provided with holes for connecting the upper protective shell 40 and the lower protective shell 41, and holes 48 for connecting the impeller. The periphery of the hole in the upper protective shell 40 is upwardly counter-pored to form a port ring 80 which extends upward into the waterproof ring 87 provided at the lower end of the motor to become a labyrinth seal, or a dynamic seal is provided between the port ring 80 and the waterproof ring 87. The protective shell is provided with a device connected to the impeller to drive the impeller to rotate, and the protective shell needs to transmit torque. A anti-rotation structure can be provided between the outer surface of the protective shell and the inner ring 59 or the cover 38. The anti-rotation structure is provided to prevent the protective shell from slipping with other components in the shell during operation. The anti-rotation structure includes a key between the outer circle of the protective shell and the inner ring 59, or a stud fastening between the outer circle of the protective shell and the inner ring 59 (see Figures 30-31 ).

[0068] The lower bearing seat 32 of the motor is connected to the support plate 36, and the waterproof ring 87 is provided on the lower surface of the support plate 36. A seal is provided between the lower bearing seat 32, the support plate 138 and the stainless steel motor shell. The support plate 138 is provided with connection holes 75 for mounting the support rods 4, and the support plate 36 can be injection molded or made of metal. The upper surface of the support plate 36 can be provided with connection sites and fixing holes for the support rods 4. The support rods can be made of metal pipes, including metal square tubes or metal round tubes (see Figure 51 ).

[0069] The lower bearing seat 32 of the motor is connected to the support plate 36, and the waterproof ring 87 is provided on the lower surface of the support plate 36. A seal is provided between the lower bearing seat 32, the support plate 138 and the stainless steel motor shell. The support plate 36 is provided with connection holes 75 for mounting the support rods, and the number of support rods is not less than three. The inner end of the support rod is connected to the support plate 36, and the outer end is connected to the floating body. The whole machine floats on the water surface by the floating body.

[0070] The figure numbers in parentheses above refer to one of the views that can be consulted in connection with the embodiments.

[0071] The above embodiments are only the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, and therefore: any equivalent changes made in accordance with the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. An impeller-type aerator, mainly comprising a water-cooled motor, a support plate, a gearbox, an impeller, a float, and three rectangular support rods, characterized in that: The support plate is located above the gearbox and below the motor, and the motor, support plate, and gearbox are sealed and secured with bolts. The support plate has three connection points for connecting to the support rods. The extension lines of each connection point are offset from the center of the aerator's output shaft. A rectangular support rod is installed in each connection point and connected to the support plate. The position of the support rod is also offset from the center line of the aerator's output shaft. The extension direction of the support rod is opposite to the rotation direction of the impeller, allowing the water-facing surface of the rectangular support rod to more effectively reflect the water spray generated by the impeller's rotation onto the water-cooled motor, thus cooling the motor and eliminating the need for a backwash plate in existing water-cooled impeller aerators. The outer end of the support rod is connected to a float, allowing the entire unit to float on the water surface. During operation, the motor, after being decelerated by the gearbox, drives the impeller to rotate and aerate the water.

2. The impeller-type aerator as described in claim 1, characterized in that, The connection position of the support plate is equipped with a limiting device to limit the setting direction of the rectangular support rod, preventing the support rod from being installed backwards and reducing its ability to reflect water splashes; if the impeller rotates counterclockwise, the outer end of the rectangular support rod set around the water-cooled motor is set clockwise; the inner end of the support rod is fastened to the support plate with bolts.

3. The impeller-type aerator as described in claim 1, characterized in that, The motor includes a water-cooled motor with a stainless steel casing. The upper end of the motor casing is sealed, and the lower end of the motor casing has a lower bearing seat connected to a support plate. A seal is provided between the lower bearing seat, the support plate, and the stainless steel motor casing. The support plate has mounting positions and connecting holes for mounting support rods around its perimeter. There are at least three support rods, with the inner end of each rod connected to a mounting position on the support plate and the outer end connected to a float. The entire machine operates by floating on the water surface using the float. The float can be an integral float or a split float. The integral float is a blow-molded flat hollow body with a large hole in the center. The motor and gearbox are installed in the large hole in the center of the integral float and connected and fixed by the support rod. Alternatively, the split float is a blow-molded hollow body, with at least three floats for each unit installed at the outer end of the support rod. The water-cooled motor is cooled by the water splashes generated by the impeller of the aerator during operation.

4. The impeller-type aerator as described in claim 3, characterized in that, The support plate is provided with a connection position for the flange of the lower bearing seat of the motor. The positioning ring of the lower bearing seat of the motor passes through the through hole in the support plate and matches the opening of the gearbox. The motor, support plate and gearbox are sealed and fastened with bolts; or the support plate is provided with a connection position for the motor housing, and a positioning ring is provided on the bottom of the support plate to match the opening of the gearbox.

5. The impeller-type aerator as described in claim 4, characterized in that, The motor includes a permanent magnet synchronous motor, the rotor of which is equipped with magnets. The permanent magnet synchronous motor may or may not have a driver. The driver may or may not have a speed regulation function. The driver is mounted on a stainless steel motor and is cooled by the water splashed up by the impeller when it is working.

6. The impeller-type aerator as described in claim 5, characterized in that, The lower bearing housing is combined with an outer annular component formed by stamping stainless steel plate. The outer annular component is mounted on the gearbox and is fastened to the gearbox housing by fastening bolts or studs passing through the support plate; or a sealing gasket is provided between the outer annular component and the gearbox housing, and the sealing gasket includes a skirt with a rainproof section.

7. The impeller-type aerator as described in claim 1, characterized in that, The impeller includes a conical impeller and a circular impeller. The circular impeller includes a connection position on the annular ring for connecting to the output shaft of the aerator. The connection position is recessed in the middle, and a connection hole for connecting to the flange of the aerator output shaft is provided in the recessed part. The annular ring connects multiple blades. The blades have curved working surfaces. The upper section of the blade is provided with a water passage hole, and the lower section of the blade is not provided with a water passage hole.

8. The impeller-type aerator as described in claim 7, characterized in that, The annular impeller body contains a hollow impeller inner float, which is blow-molded and fixed within the annular impeller body.

9. A paddlewheel aerator as described in claim 1, characterized in that, The gearbox has a positioning stop on the inner side of the upper port of the housing, and a reduction gear is installed inside the housing. The reduction gear includes a driving pinion mounted on the motor shaft to drive a first-stage driven gear. The first-stage driven gear is coaxial with a second-stage driving pinion, which drives the second-stage driven gear. The second-stage driven gear is mounted on the output shaft. The shaft of the second-stage driving pinion is equipped with an upper bearing and a lower bearing. The upper bearing is located in the bearing chamber at the upper port of the housing, and the lower bearing is located in the bearing chamber at the bottom of the housing. After the motor and the gearbox are assembled, the output shafts of the motor and the gearbox are on the same axis. The output shaft extends downward after being sealed by a mechanical seal or a skeleton oil seal. During operation, the output shaft drives the impeller to rotate.

10. A paddlewheel aerator as described in claim 1, characterized in that, The aerator's motor and planetary reduction mechanism are integrated, mainly comprising a motor and a planetary reduction gear. The motor mainly includes a rotor, stator, motor housing, upper bearing housing, and lower bearing housing. The planetary reduction gear mainly includes an internal gear ring, multiple planetary gears, and a central sun gear. The motor shaft is rotatable, supported by the upper and lower bearings, which are respectively mounted in the bearing chambers of the upper and lower bearing housings. The lower end of the motor shaft extends downwards, and the extended end is connected to the sun gear. During operation, the sun gear of the motor shaft drives the planetary gears. Each planetary gear contains a bearing. The shafts of multiple planetary gears are all mounted on the same planetary gear carrier, which is fixed to the lower shaft. The bearing does not rotate; the internal gear ring is equipped with a cover, and a bearing is installed inside the cover. The inner circle of the bearing is directly or indirectly connected to the lower bearing seat of the motor; the planetary gear drives the internal gear ring, the cover and the protective shell to rotate at a low speed under the drive of the sun gear shaft. The component that rotates at a low speed is the outer rotor that drives the aerator impeller to rotate. The protective shell mainly includes an upper protective shell and a lower protective shell. The upper protective shell is equipped with a mouth ring at the upper end. The mouth ring can extend upward and enter the waterproof ring set at the lower end of the motor to form a labyrinth seal. A seal can be set between the mouth ring and the planetary gear carrier, or between the mouth ring and the waterproof ring. The lower protective shell is sealed and connected to the upper protective shell. During operation, the protective shell and the internal gear ring rotate together.

Images