A coaxial wheel rim propulsion device

Abstract

The present invention discloses a coaxial rim propulsion device, wherein the rim propulsion pump is coaxially arranged with the motor rotor, the coaxial sleeve, rim vane pump, sleeve inner retaining ring and sleeve flange form a water medium flow channel, the sleeve inner retaining ring and sleeve flange retain the rim vane pump in the sleeve, and the rim vane pump is driven by the motor rotor to rotate and do work by a key; the thrust provided by the rim vane pump is transmitted to the sleeve by the annular inner boss of the sleeve, and then transmitted to the inner ring body of bearing one by the annular outer boss of the sleeve, and then transmitted to the outer ring body of bearing one, and then transmitted to the semi-shell one and semi-shell two of the coaxial rim propulsion device, so as to provide the thrust required by the body. The rim propulsion device of the present invention has high integration, simple structure, and convenient production, and realizes the detachability of the rotor and the blades, and the propulsion device is provided with an O-ring seal and a labyrinth seal structure to prevent seawater and foreign bodies from flowing into the propulsion device, reduce the friction between the components, and ensure the reliability of the propulsion device structure.

Description

Technical Field

[0001] The invention belongs to the field of underwater vehicle equipment and relates to a rim propulsion device, in particular to a coaxial rim propulsion device. Background Art

[0002] The rim propulsion device is also called a shaftless propulsion device. It is used for underwater power drive of surface vehicles or underwater vehicles. Unlike traditional propeller propulsion devices, it does not use a shaft to transmit torque. The torque generated by the electric motor is transmitted to the rim of the waterjet rim vane pump, driving the rim vane pump to rotate. It has the characteristics of small size and light weight, and good flow characteristics of the waterjet outlet. It is particularly suitable for surface vehicles or underwater vehicles that require small thrust. It is a new research and development hotspot in the relevant field in the world.

[0003] At present, the hubless rim propulsion device with an integrated structure designs the rotor and blades of the motor as one body, which cannot be disassembled. If the motor rotor and blades fail, the entire rotor and blade parts need to be replaced. This makes the maintenance of the rim propulsion device inconvenient and reduces the reliability of the propulsion device. At the same time, the rim propulsion device of the prior art uses water-lubricated bearings for sealing, and forms a water channel through the air gap channels between the bearings and between the stator and rotor, so that water is used to ensure the lubrication of the water-lubricated bearings and the cooling of the motor, but the open water channel also brings certain hidden dangers. This sealing method is greatly affected by the environmental medium. Foreign matter will enter the interior of the rim propulsion device through the water channel, which increases the friction when the propulsion device is running, affecting the performance and efficiency of the propulsion device. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a coaxial rim propulsion device to solve the technical problems of inconvenient disassembly and assembly of the propulsion device and unreliable sealing.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The invention discloses a coaxial wheel rim propulsion device, comprising a motor, a sleeve flange, a wheel rim vane pump, a sleeve, a sleeve inner retaining ring, four bearing outer retaining rings, two symmetrically arranged bearings 1 and 2, and an annular housing formed by connecting a half shell 1 and a half shell 2;

[0007] The motor rotor of the motor is coaxially arranged with the rim vane pump, the rim vane pump is connected to the annular sleeve by a key, and is contacted and positioned with the annular inner boss of the sleeve, the sleeve inner retaining ring is connected to the sleeve by a key, the sleeve inner retaining ring retains the rim vane pump in the annular inner cavity of the sleeve, and the sleeve flange is used to retain the sleeve inner retaining ring and the rim vane pump in the sleeve; the sleeve is connected to the motor rotor by sleeve key 1 and sleeve key 2; the sleeve is connected to the inner ring body of bearing 1 and the inner ring body of bearing 2, the bearing 1 is contacted and positioned with the annular outer boss on the sleeve, and the outer ring body of bearing 1 and the outer ring body of bearing 2 are fixed to the semi-housing 1 and the bearing seat of the half shell 2; four bearing outer retaining rings include a sleeve outer retaining ring 1, a sleeve outer retaining ring 2, a sleeve outer retaining ring 3 and a sleeve outer retaining ring 4, the four bearing outer retaining rings are connected to the sleeve by a sleeve key 1 and a sleeve key 2, the sleeve outer retaining ring 1 and the sleeve outer retaining ring 2 are contacted and positioned between the inner ring body of the bearing 1 and the motor rotor, the sleeve outer retaining ring 3 and the sleeve outer retaining ring 4 are contacted and positioned between the inner ring body of the bearing 2 and the motor rotor; the half shell 1 and the half shell 2 are respectively connected with a shell flange 1 and a shell flange 2; the motor stator of the motor is connected to the connected half shell 1 and the half shell 2.

[0008] Preferably, the housing flange 1 contacts and fixes the outer ring body of the bearing 1 on the bearing seat of the connected half housing 1 and half housing 2, and the housing flange 2 contacts and fixes the outer ring body of the bearing 2 on the bearing seat of the connected half housing 1 and half housing 2;

[0009] A sealing structure is provided between the shell flange 1 and the shell flange 2 and the connected half shell 1 and the half shell 2, respectively, and a sealing structure is provided between the shell flange 1 and the shell flange 2 and the shaft sleeve, respectively.

[0010] Preferably, a sealing structure is provided between the outer retaining ring 1 of the sleeve and the inner ring body of the bearing 1, a sealing structure is provided between the outer retaining ring 3 of the sleeve and the inner ring body of the bearing 2, a sealing structure is provided between the outer retaining ring 1 of the sleeve and the outer retaining ring 3 of the sleeve and the connected half shell 1 and half shell 2 respectively, a sealing structure is provided between the outer shell flange 1 and the inner ring body of the bearing 1, and a sealing structure is provided between the outer shell flange 2 and the inner ring body of the bearing 2.

[0011] Preferably, an O-ring 2 is provided between the housing flange 1 and the connected half housing 1 and half housing 2, an O-ring 1 is provided between the housing flange 2 and the connected half housing 1 and half housing 2, an O-ring 4 and an O-ring 5 are provided between the housing flange 1 and the shaft sleeve, and an O-ring 6 and an O-ring 7 are provided between the housing flange 2 and the shaft sleeve;

[0012] An O-ring three is provided between the outer retaining ring one of the sleeve and the inner ring body of the bearing one, a labyrinth seal is provided between the outer retaining ring one of the sleeve and the connected half shell one and half shell two, a labyrinth seal is provided between the shell flange one and the inner ring body of the bearing one, an O-ring eight is provided between the outer retaining ring three of the sleeve and the inner ring body of the bearing two, a labyrinth seal is provided between the outer retaining ring three of the sleeve and the connected half shell one and half shell two, and a labyrinth seal is provided between the shell flange two and the inner ring body of the bearing two.

[0013] Preferably, the key used to connect the rim vane pump and the shaft sleeve is processed separately from the rim vane pump, and the rim vane pump is processed with a corresponding keyway.

[0014] Preferably, the key used for connecting the inner retaining ring of the sleeve with the sleeve is processed separately from the inner retaining ring of the sleeve, and a corresponding keyway is processed on the inner retaining ring of the sleeve.

[0015] Preferably, the shaft sleeve, the shaft sleeve key 1 and the shaft sleeve key 2 are processed as one piece.

[0016] Preferably, the first shaft sleeve outer retaining ring and the second shaft sleeve outer retaining ring are processed as one piece, and the third shaft sleeve outer retaining ring and the fourth shaft sleeve outer retaining ring are processed as one piece.

[0017] Preferably, the motor stator is connected to the connected half-shell 1 and half-shell 2 by a key.

[0018] Preferably, the key used for connecting the motor stator with the connected half shell 1 and half shell 2 is processed separately from the motor stator, and the motor stator is processed with a corresponding keyway.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The coaxial rim propulsion device disclosed in the present invention realizes the integration of the rim propulsion device. The rim propulsion pump and the motor rotor are coaxially arranged and are both connected to the middle sleeve. The rim vane pump is fixed in the annular inner cavity through the sleeve, the sleeve inner retaining ring and the sleeve flange; the motor rotor is connected to the sleeve through the sleeve key. The propulsion device realizes the detachability of the motor rotor and the rim vane pump while ensuring the sealing. When a fault occurs, one of the components of the rim propulsion device can be directly replaced, and the maintenance cost is low. The rim propulsion device is provided with a sealing structure to ensure the overall sealing of the propulsion device, prevent seawater and foreign matter from entering, reduce the friction between the components, and ensure the reliability of the propulsion device structure. When the motor rotor rotates, the sleeve and the housing flange form a dynamic sealing structure, and an O-ring is arranged between the sleeve outer retaining ring and the inner ring body of the bearing to reduce the friction during rotation; a labyrinth seal is arranged between the housing flange and the inner ring body of the bearing, and a labyrinth seal is arranged between the sleeve outer retaining ring and the semi-shell, so that seawater will not flow into the motor. At the same time, the sealing structure prevents the entry of foreign matter in the seawater, ensuring the life and reliability of the propulsion device during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A side view of a coaxial rim propulsion device showing that the working fluid flows from the left side of the drawing to the right side of the drawing.

[0022] Figure 2 To follow the flow direction of the working medium, the front view of the coaxial rim propulsion device is shown.

[0023] Figure 3 for Figure 1 Top view of the central coaxial rim propulsion device.

[0024] Figure 4 for Figure 1 Rear view of the central coaxial rim propulsion device.

[0025] Figure 5 for Figure 2 Rotated section view of BB.

[0026] Figure 6 for Figure 2 Middle CC section view.

[0027] Figure 7 for Figure 3 DD Rotated Section View

[0028] In the figure: 1-support one, 2-support two, 3-support three, 4-support four, 5-half shell one, 6-half shell two, 7-shell flange one, 8-sleeve flange, 9-rim vane pump, 10-shell flange two, 11-bearing one, 12-sleeve, 13-sleeve inner retaining ring, 14-sleeve outer retaining ring one, 15-sleeve flange gasket, 16-sleeve outer retaining ring two, 17-sleeve outer retaining ring three, 18-sleeve outer retaining ring four, 19-bearing two, 20-O-ring one, 21-O O-ring 2, 22-O-ring 3, 23-O-ring 4, 24-O-ring 5, 25-O-ring 6, 26-O-ring 7, 27-O-ring 8, 28-motor stator, 29-motor rotor, 30-sleeve key 1, 31-sleeve key 2, 65-bolt 65, 66-spring washer 66, 67-flat washer 67, 68-bolt 68, 69-spring washer 69, 70-flat washer 70, 71-bolt 71, 72-spring washer 72, 73-flat washer 73, 74-bolt 74, 75-spring washer 75, 76-flat washer 76, 77-bolt 77, 78-spring washer 78, 79-flat washer 79, 80-bolt eighty, 81-spring washer eighty-one, 82-flat washer eighty-two, 83-bolt eighty-three, 84-spring washer eighty-four, 85-flat washer eighty-five, 86-bolt eighty-six, 87-spring washer eighty-seven, 88-flat washer eighty-eight, 92-bolt ninety-two, 93-spring washer ninety-three, 94-flat washer ninety-four, 95-bolt ninety-five, 96-spring washer ninety-six, 97-flat washer ninety-seven, 98-bolt ninety-eight, 99-spring washer ninety-nine, 100-flat washer one hundred, 101-bolt one hundred 1, 102-spring washer 102, 103-flat washer 103, 104-bolt 104, 105-spring washer 105, 106-flat washer 106, 107-bolt 107, 108-spring washer 108, 109-flat washer 109, 110-bolt 110, 111-spring washer 111, 112-flat washer 112, 113-bolt 113, 114-spring washer 114, 115-flat washer 115, 116-bolt 116, 117-spring washer one hundred and seventeen, 118-flat washer one hundred and eighteen, 119-bolt one hundred and nineteen, 120-spring washer one hundred and twenty, 121-flat washer one hundred and twenty-one, 122-bolt one hundred and twenty-two, 123-spring washer one hundred and twenty-three, 124-flat washer one hundred and twenty-four, 125-bolt one hundred and twenty-five, 126-spring washer one hundred and twenty-six, 127-flat washer one hundred and twenty-seven, 128-bolt one hundred and twenty-eight, 129-spring washer one hundred and twenty-nine, 130-flat washer one hundred and thirty, 131-flat washer one hundred and thirty-one,132-nut one hundred and thirty-two, 133-bolt one hundred and thirty-three, 134-spring washer one hundred and thirty-four, 135-flat washer one hundred and thirty-five, 136-flat washer one hundred and thirty-six, 137-nut one hundred and thirty-seven, 138-bolt one hundred and thirty-eight, 139-spring washer one hundred and thirty-nine, 140-flat washer one hundred and forty, 141-flat washer one hundred and forty-one, 142-nut one hundred and forty-two, 143-bolt one hundred and forty-three, 144-spring washer one hundred and forty-four, 145-flat washer one hundred and forty-five, 146-flat washer one hundred and forty-six, 147-nut one hundred and forty-seven, 148-bolt one hundred and forty-eight, 149-spring washer one hundred and forty-nine, 150-flat washer one hundred and fifty, 151-flat washer one hundred and fifty-one, 152-nut one hundred and fifty-two, 153-bolt one hundred and fifty-three, 154-spring washer one hundred and fifty-four, 155-flat washer one hundred and fifty-five, 156- flat washer one hundred and fifty-six, 157- nut one hundred and fifty-seven. , DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0032] Example 1

[0033] A coaxial wheel rim propulsion device, comprising a motor, a sleeve flange 8, a wheel rim vane pump 9, a sleeve 12, a sleeve inner retaining ring 13, four bearing outer retaining rings, two symmetrically arranged bearings 11 and 19, and an annular housing formed by connecting a half shell 1 5 and a half shell 2 6;

[0034] The motor rotor 29 of the motor is coaxially arranged with the rim vane pump 9. The rim vane pump 9 is connected to the annular sleeve 12 by a key and is contacted and positioned with the annular inner boss of the sleeve 12. The sleeve inner retaining ring 13 is connected to the sleeve 12 by a key. The sleeve inner retaining ring 13 retains the rim vane pump 9 in the annular inner cavity of the sleeve 12. The sleeve flange 8 is used to retain the sleeve inner retaining ring 13 and the rim vane pump 9 in the sleeve 12; the sleeve 12 is connected to the motor rotor 29 by a sleeve key 1 30 and a sleeve key 2 31; the sleeve 12 is connected to the inner ring body of the bearing 11 and the inner ring body of the bearing 2 19, the bearing 1 is contacted and positioned with the annular outer boss on the sleeve 12, and the outer ring body of the bearing 11 and the outer ring body of the bearing 2 19 are fixed to the semi-housing. On the bearing seat of half shell 15 and half shell 26; four bearing outer retaining rings include sleeve outer retaining ring 14, sleeve outer retaining ring 216, sleeve outer retaining ring 31 and sleeve outer retaining ring 4, the four bearing outer retaining rings are connected to the sleeve 12 by sleeve key 130 and sleeve key 21, sleeve outer retaining ring 14 and sleeve outer retaining ring 216 are contacted and positioned between the inner ring body of bearing 11 and the motor rotor 29, sleeve outer retaining ring 317 and sleeve outer retaining ring 418 are contacted and positioned between the inner ring body of bearing 21 and the motor rotor 29; shell flange 17 and shell flange 210 are respectively connected to half shell 15 and half shell 26; the motor stator 28 of the motor is connected to the connected half shell 15 and half shell 26.

[0035] Along the flow direction of the working medium, the front view of the coaxial rim propulsion device of the present invention is as follows: Figure 2 As shown, Figure 3 for Figure 1 The top view of the central coaxial rim propulsion device. Figure 4 for Figure 1 Rear view of the central coaxial rim propulsion device. Figure 5 for Figure 2 The BB rotated section view, Figure 6 for Figure 2 Middle CC section view, Figure 7 for Figure 3 DD rotated section view.

[0036] The motor rotor 29 of the three-phase AC asynchronous motor is coaxially arranged with the stainless steel rim vane pump 9. The rim vane pump 9 is connected to the annular stainless steel sleeve 12 by a symmetrical key integrated therewith, and is contacted and positioned with the annular inner boss of the sleeve 12. The stainless steel sleeve inner retaining ring 13 is connected to the sleeve 12 by a symmetrical key integrated therewith. The sleeve 12 is processed with an inner ring symmetrical keyway. The sleeve inner retaining ring 13 retains the rim vane pump 9 in the annular inner cavity of the sleeve 12. The stainless steel sleeve flange 8 is composed of stainless steel fasteners including bolts 116, spring washers 117, 117, flat washers 118, bolts 119, 119, spring washers 120, and flat washers 120. 121, bolt 122, spring washer 123, flat washer 124, bolt 125, spring washer 126, flat washer 127, and rubber sleeve flange gasket 15 are used to block the sleeve inner retaining ring 13 and the wheel flange vane pump 9 in the sleeve 12. The rear end surface of the sleeve 12 is processed with corresponding threaded holes; the sleeve 12 is connected to the motor rotor 29 by a stainless steel sleeve key 1 30 and a stainless steel sleeve key 2 31. The shaft sleeve 12 is connected, and the outer ring symmetrical key grooves are processed, and the outer ring symmetrical key grooves are arranged vertically with the inner ring symmetrical key grooves; the shaft sleeve 12 is fixedly connected with the inner ring body of the bearing 11 by interference fit, and the bearing 11 is contacted and positioned with the annular outer boss on the shaft sleeve 12, and the other end of the shaft sleeve 12 is fixedly connected with the inner ring body of the bearing 2 19 by interference fit, and the bearing 11 and the bearing 2 19 are stainless steel deep groove ball bearings, and the outer ring body of the bearing 11 and the outer ring body of the bearing 2 19 are connected to the bearing seats of the connected stainless steel half shell 1 5 and the stainless steel half shell 2 6; the stainless steel shaft sleeve outer retaining ring 14 and the engineering plastic shaft sleeve outer retaining ring 2 16 are both processed with symmetrical key grooves, connected with the shaft sleeve 12 by the shaft sleeve key 1 30 and the shaft sleeve key 2 31, and contacted and positioned with the inner ring body of the bearing 11 and the motor rotor 29;Stainless steel fasteners bolt ninety-two 92, spring washer ninety-three 93, flat washer ninety-four 94, bolt ninety-five 95, spring washer ninety-six 96, flat washer ninety-seven 97, bolt ninety-eight 98, spring washer ninety-nine 99, flat washer one hundred 100, bolt one hundred and one 101, spring washer one hundred and two 102, flat washer one hundred and three 103, bolt one hundred and four 104, spring washer one hundred and five 105, flat washer one hundred and six 106, bolt one hundred and seven 107, spring washer one hundred and eight 108, flat washer one hundred and nine 109, bolt one hundred and ten 110, spring washer one hundred and eleven 111, flat washer one hundred and twelve 112, bolt one hundred and thirteen 113, spring washer One hundred and fourteen 114 and flat washer one hundred and fifteen 115 fix the stainless steel housing flange 1 7 to the connected half housing 1 5 and half housing 2 6, and the stainless steel fasteners include bolts 65, spring washers 66, flat washers 67, bolts 68, spring washers 69, flat washers 70, bolts 71, 71, spring washers 72, flat washers 73, bolts 74, spring washers 75, flat washers 76, bolts 77, spring washers 78, flat washers 79, bolts 80, spring washers 81, 81, flat washers 82, bolts 83, spring washers 84, 84, flat washers The stainless steel housing flange 210 is fixed to the connected half housing 15 and half housing 26 by the screw 85, the bolt 86, the spring washer 87, and the flat washer 88; the half housing 15 and the half housing 26 are fixed by the stainless steel fasteners bolt 128, the spring washer 129, the flat washer 130, the flat washer 131, the nut 132, the bolt 133, the spring washer 134, the flat washer 135, the flat washer 136, the nut 137, the bolt 138 (138), the spring washer 139, the flat washer 140, Flat washer 141, nut 142, bolt 143, spring washer 144, flat washer 145, flat washer 146, nut 147, bolt 148, spring washer 149, flat washer 150, flat washer 151, nut 152, bolt 153, spring washer 154, flat washer 155, flat washer 156, nut 157, and nut 157 are connected to form an annular outer shell. The half shell 1 5 and the half shell 2 6 are both processed with a connecting flange body with corresponding through holes.The motor stator 28 of the three-phase AC asynchronous motor is connected to the connected half shell 1 5 and half shell 2 6 by a symmetrical key integrated therewith, and the connected half shell 1 5 and half shell 2 6 are processed with corresponding symmetrical key grooves; the protruding ring body of the shell flange 1 7 and the protruding ring body of the shell flange 2 10 respectively press and fix the outer ring body of the bearing 1 11 and the outer ring body of the bearing 2 19 on the bearing seats of the connected half shell 1 5 and half shell 2 6, and the shell flange 1 7 and the shell flange 2 10 are respectively pressed and fixed on the corresponding end faces of the connected half shell 1 5 and half shell 2 6, and the half shell 1 5 and half shell 2 6 are processed with corresponding threaded holes; the outer retaining ring 14 of the shaft sleeve is connected to the bearing 11 A rubber O-ring 3 22 is provided between the inner ring body of the bearing 2, and a labyrinth seal is provided between the shaft sleeve outer retaining ring 14 and the connected half shell 1 5 and half shell 2 6; a rubber O-ring 8 27 is provided between the shaft sleeve outer retaining ring 3 17 and the inner ring body of the bearing 2, and a labyrinth seal is provided between the shaft sleeve outer retaining ring 3 17 and the connected half shell 1 5 and half shell 2 6; an O-ring 21 is provided between the housing flange 17 and the connected half shell 1 5 and half shell 6, and a rubber O-ring 1 20 is provided between the housing flange 2 10 and the connected half shell 1 5 and half shell 6; a dynamic seal, a rubber O-ring 4 23 and a rubber O-ring 5 24 are provided between the housing flange 17 and the shaft sleeve 12; a dynamic seal, a rubber O-ring 6 25 and a rubber O-ring 7 26 are provided between the housing flange 17 and the shaft sleeve 12; A labyrinth seal is provided between the housing flange 2 10 and the inner ring of the bearing 1 11 and the inner ring of the bearing 2 19 respectively; the stainless steel support 1 1 and the stainless steel support 2 2 are symmetrically welded on the circular outer surface of the semi-housing 2 6, the stainless steel support 3 3 and the stainless steel support 4 4 are symmetrically welded on the circular outer surface of the semi-housing 1 5, and the axes of the four circular through holes of the support 1 1, the support 2 2, the support 3 3 and the support 4 4 are all perpendicular to the connection surface of the semi-housing 1 5 and the semi-housing 2 6; the outer surface of the connection between the semi-housing 1 5 and the semi-housing 2 6 is coated with waterproof sealant. ;

[0037] The coaxial wheel rim propulsion device of the present invention works as follows:

[0038] When the rim propulsion device is working, the motor stator 28 connected to the half shell 1 5 and the half shell 2 6 generates a rotating magnetic field after the sinusoidal alternating current is passed through it, and the motor rotor 29 begins to rotate under the force of the rotating magnetic field. The motor rotor 29 is connected with the shaft sleeve outer retaining ring 1 14, the shaft sleeve outer retaining ring 2 16, the shaft sleeve outer retaining ring 3 17, and the shaft sleeve outer retaining ring 4 18 through the shaft sleeve key 1 30 and the shaft sleeve key 2 31 to rotate together. The coaxial shaft sleeve 12, the rim vane pump 9, the shaft sleeve inner retaining ring 13 and the shaft sleeve flange 8 form a water working medium flow channel, and the shaft sleeve inner retaining ring 13 and the shaft sleeve flange 8 fix the rim vane pump in the shaft sleeve. The rim vane pump 9 is driven by the motor rotor 29 to rotate and do work through the key, thereby providing thrust for the propulsion device. The thrust is transmitted to the shaft sleeve 12 by the annular inner boss of the shaft sleeve 12, and then to the inner ring bodies of bearing 11 and bearing 2 19 by the annular outer boss of the shaft sleeve 12, and then to the outer ring bodies of bearing 11 and bearing 2 19, and finally to the half shell 1 5 and half shell 2 6 of the coaxial wheel rim propulsion device, providing the thrust required by the machine body.

[0039] When the rim vane pump 9 rotates to do work, the shaft sleeve 12 and the housing flange 17 and the housing flange 2 10 are dynamically sealed by two layers of O-rings. When the rim vane pump 9 rotates, the propulsion device will form a pressure difference with the external seawater, and the seawater will enter through the channel between the O-ring 5 24 and the O-ring 6 25 and the shaft sleeve 12, forming a layer of water film, which plays a role in lubrication; at the same time, each time the fluid passes through a layer of sealing ring, a throttling occurs to ensure the sealing of the propulsion device. A labyrinth seal structure is provided between the housing flange 17 and the housing flange 2 10 and the inner ring body of the bearing 11 and the bearing 2 19. The housing flange 17 and the housing flange 2 10 are respectively provided with sawtooth-shaped chambers, and a series of interception gaps and expansion cavities are formed between the teeth, so as to achieve sealing at the bearing, ensuring that only a small amount of seawater will flow into the bearing 11 and the bearing 2 19 through the chamber. The bearings are lubricated by their own lubricating oil. There are O-rings between the bearing 11 and the sleeve outer retaining ring 14, and between the bearing 2 19 and the sleeve outer retaining ring 3 17, which are used to reduce the friction between the sleeve outer retaining ring and the bearing. The sleeve outer retaining ring 3 17 and the sleeve outer retaining ring 14 are respectively provided with labyrinth seals between the connected half shell 1 5 and the half shell 2 6. The seawater passes through a series of interception gaps and expansion cavities of the zigzag chamber, and finally no seawater flows into the motor part, ensuring the safety and reliability of the motor during operation. The motor stator 28 and the motor rotor 29 are cooled by the seawater constantly flushed around the shell.

[0040] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A coaxial rim propulsion device, characterized in that: It comprises a motor, a sleeve flange (8), a rim vane pump (9), a sleeve (12), a sleeve inner retaining ring (13), four bearing outer retaining rings, two symmetrically arranged bearings 1 (11) and 2 (19), and an annular housing formed by connecting a half shell 1 (5) and a half shell 2 (6); The motor rotor (29) of the motor is coaxially arranged with the wheel blade pump (9). The wheel blade pump (9) is connected to the annular shaft sleeve (12) by a key and is contacted and positioned with the annular inner shoulder of the shaft sleeve (12). The shaft sleeve inner retaining ring (13) is connected to the shaft sleeve (12) by a key. The shaft sleeve inner retaining ring (13) retains the wheel blade pump (9) in the annular inner cavity of the shaft sleeve (12). The shaft sleeve flange (8) is used to hold the shaft sleeve inner retaining ring (13) The pump (9) and the wheel flange are blocked in the shaft sleeve (12); the shaft sleeve (12) is connected to the motor rotor (29) by the shaft sleeve key 1 (30) and the shaft sleeve key 2 (31); the shaft sleeve (12) is connected to the inner ring body of the bearing 1 (11) and the inner ring body of the bearing 2 (19); the bearing 1 (11) is contacted and positioned with the annular outer shoulder on the shaft sleeve (12); the outer ring body of the bearing 1 (11) and the outer ring body of the bearing 2 (19) are fixed in the semi-circular manner. On the bearing seats of the housing 1 (5) and the half housing 2 (6); four bearing outer retaining rings include a sleeve outer retaining ring 1 (14), a sleeve outer retaining ring 2 (16), a sleeve outer retaining ring 3 (17) and a sleeve outer retaining ring 4 (18); the four bearing outer retaining rings are connected to the sleeve (12) by a sleeve key 1 (30) and a sleeve key 2 (31); the sleeve outer retaining ring 1 (14) and the sleeve outer retaining ring 2 (16) are contacted and positioned between the inner ring body of the bearing 1 (11) and the motor rotor (29); the sleeve outer retaining ring 3 (17) and the sleeve outer retaining ring 4 (18) are contacted and positioned between the inner ring body of the bearing 2 (19) and the motor rotor (29); the half housing 1 (5) and the half housing 2 (6) are respectively connected to the housing flange 1 (7) and the housing flange 2 (10); the motor stator (28) of the motor is connected to the connected half housing 1 (5) and the half housing 2 (6); An O-ring 2 (21) is provided between the housing flange 1 (7) and the connected half housing 1 (5) and half housing 2 (6); an O-ring 1 (20) is provided between the housing flange 2 (10) and the connected half housing 1 (5) and half housing 2 (6); an O-ring 4 (23) and an O-ring 5 (24) are provided between the housing flange 1 (7) and the shaft sleeve (12); and an O-ring 6 (25) and an O-ring 7 (26) are provided between the housing flange 2 (10) and the shaft sleeve (12); An O-ring three (22) is provided between the outer retaining ring one (14) of the sleeve and the inner ring body of the bearing one (11); a labyrinth seal is provided between the outer retaining ring one (14) of the sleeve and the connected half shell one (5) and half shell two (6); a labyrinth seal is provided between the shell flange one (7) and the inner ring body of the bearing one (11); an O-ring eight (27) is provided between the outer retaining ring three (17) of the sleeve and the inner ring body of the bearing two (19); a labyrinth seal is provided between the outer retaining ring three (17) of the sleeve and the connected half shell one (5) and half shell two (6); and a labyrinth seal is provided between the shell flange two (10) and the inner ring body of the bearing two (19).

2. The coaxial rim propulsion device according to claim 1, characterized in that: The housing flange 1 (7) contacts and fixes the outer ring of the bearing 1 (11) on the bearing seats of the connected half housing 1 (5) and the half housing 2 (6); the housing flange 2 (10) contacts and fixes the outer ring of the bearing 2 (19) on the bearing seats of the connected half housing 1 (5) and the half housing 2 (6); A sealing structure is provided between the shell flange 1 (7) and the shell flange 2 (10) and the connected half shell 1 (5) and the half shell 2 (6), and a sealing structure is provided between the shell flange 1 (7) and the shell flange 2 (10) and the shaft sleeve (12).

3. The coaxial rim propulsion device according to claim 1, characterized in that: A sealing structure is provided between the shaft sleeve outer retaining ring 1 (14) and the inner ring body of the bearing 1 (11), a sealing structure is provided between the shaft sleeve outer retaining ring 3 (17) and the inner ring body of the bearing 2 (19), a sealing structure is provided between the shaft sleeve outer retaining ring 1 (14) and the shaft sleeve outer retaining ring 3 (17) and the connected half housing 1 (5) and half housing 2 (6), respectively, a sealing structure is provided between the housing flange 1 (7) and the inner ring body of the bearing 1 (11), and a sealing structure is provided between the housing flange 2 (10) and the inner ring body of the bearing 2 (19).

4. The coaxial rim propulsion device according to any one of claims 1 to 3, characterized in that: The key used for connecting the rim vane pump (9) and the shaft sleeve (12) is processed separately from the rim vane pump (9), and a corresponding keyway is processed on the rim vane pump (9).

5. The coaxial rim propulsion device according to any one of claims 1 to 3, characterized in that: The key used for connecting the shaft sleeve inner retaining ring (13) with the shaft sleeve (12) and the shaft sleeve inner retaining ring (13) are processed separately, and the shaft sleeve inner retaining ring (13) is processed with a corresponding keyway.

6. The coaxial rim propulsion device according to any one of claims 1 to 3, characterized in that: The shaft sleeve (12), the shaft sleeve key 1 (30) and the shaft sleeve key 2 (31) are processed as one piece.

7. The coaxial rim propulsion device according to any one of claims 1 to 3, characterized in that: The shaft sleeve outer retaining ring 1 (14) and the shaft sleeve outer retaining ring 2 (16) are processed as one piece, and the shaft sleeve outer retaining ring 3 (17) and the shaft sleeve outer retaining ring 4 (18) are processed as one piece.

8. The coaxial rim propulsion device according to any one of claims 1 to 3, characterized in that: The motor stator (28) is connected to the connected half-shell 1 (5) and half-shell 2 (6) by a key.

9. The coaxial rim propulsion device according to claim 8, characterized in that: The key used for connecting the motor stator (28) with the connected half shell 1 (5) and the half shell 2 (6) is processed separately from the motor stator (28), and the motor stator (28) is processed with a corresponding keyway.

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