Sealing structure of underwater propulsion motor

Abstract

The utility model provides a sealing structure of an underwater propulsion motor, which comprises a cylindrical shell, an installation seat arranged on the side wall of the upper end of the shell, and an installation hole and a wire hole arranged on the installation seat; the rotor paddle comprises a cylinder body and is rotatably mounted in the shell, and paddle blades are uniformly distributed on the inner wall of the cylinder body in the circumferential direction; the driving assembly comprises a coil winding and a permanent magnet, and a wire hole is internally provided with a sealing plug or filled with sealant; the number of the sealing covers is two, the sealing covers are fixed to the two ends of the shell through bolts, and sealing rings and / or sealing gaskets are arranged between the sealing covers and the shell; the oil seal is arranged on the sealing cover, and a sealing lip of the oil seal makes contact with the outer wall of the cylinder to achieve sealing; and a sealing cavity is formed among the shell, the rotor paddle and the sealing cover. The sealing structure of the underwater propulsion motor is compact in structure, strong in driving force, high in use safety, long in service life, low in working noise, good in use experience and wide in application scene.

Description

Technical Field

[0001] This utility model relates to a propulsion device, and more particularly to a sealing structure for an underwater propulsion motor. Background Technology

[0002] With my country's economic development, people's income and consumption levels have significantly increased, prompting the continuous development and maturation of the tertiary and tourism industries, leading to a wide variety of entertainment options. In recent years, water-based entertainment, especially in coastal cities, has become increasingly popular, resulting in constant updates and iterations of water-based recreational facilities. Most existing water-based recreational facilities rely on water-based activities unrelated to swimming to entertain tourists. Since people go to the beach, rivers, or lakes primarily to cool off, swimming activities—which involve immersing oneself in water and viewing underwater scenery not normally seen—haven't changed much. Underwater swimming requires a lot of physical exertion, causing tourists to feel exhausted or unable to fully enjoy the experience due to excessive swimming movements. When playing by the water, most people cannot swim and often use swimming rings, but they struggle to control the rings effectively, wasting a lot of energy sliding on the water's surface. With advancements in electric technology, the energy density and performance of batteries have continuously improved, and electric motor technology has become more sophisticated, making underwater propulsion feasible. This allows people to move forward and backward on the water using any marine recreational equipment, increasing the diversity of marine / underwater recreation.

[0003] Existing propellers are usually ordinary propellers, which pose certain safety hazards during use, have low transmission efficiency, and are noisy, thus limiting their application scenarios. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a sealing structure for an underwater propulsion motor that has strong driving force, safe use, high sealing performance, and low noise.

[0005] This utility model provides a sealing structure for an underwater propulsion motor, which includes:

[0006] The housing 1 serves as an installation carrier. The housing 1 is a cylindrical shape that is horizontally set and open at both ends. The upper side wall of the housing 1 is provided with a mounting seat, and the mounting seat is provided with a mounting hole 121 and a wire hole 10.

[0007] The rotor blade 4 includes a cylindrical body 41 that is coaxial with the housing 1 and open at both ends. The cylindrical body 41 is rotatably mounted inside the housing 1 via bearings 5. Multiple blades 42 are evenly distributed around the inner wall of the cylindrical body 41.

[0008] The drive assembly includes a coil winding 21 installed on the inner wall of the housing 1 and a permanent magnet 22 installed on the outer wall of the cylindrical body 41 and located on the same radial plane as the coil winding 21. The wires on the coil winding 21 extend to the outside of the housing 1 after passing through the wire hole 10. A sealing plug 13 or sealant is provided in the wire hole 10.

[0009] Two sealing caps 3 are fixed to both ends of the housing 1 by bolts, and a sealing ring and / or sealing gasket are provided between the sealing cap 3 and the housing 1;

[0010] An oil seal 63 is provided on the sealing cover 3, and the sealing lip of the oil seal 63 contacts the outer wall of the cylindrical body 41 to achieve a seal;

[0011] A sealed chamber is formed between the housing 1, the rotor blade 4, and the sealing cover 3.

[0012] Compared with traditional propellers, the underwater propulsion motor of this application integrates the motor rotor with the propeller by eliminating the traditional mechanical transmission shaft system. Its advantages cover efficiency, stealth, safety, reliability and other aspects, which significantly improves the overall performance of the underwater propulsion system.

[0013] Traditional propellers use bearings, gearboxes, and long shafts for transmission, resulting in mechanical losses of 10%-15%. In contrast, this application uses electromagnetic fields to directly drive the blades, achieving a transmission efficiency of nearly 100%, which greatly reduces energy loss. At the same time, eliminating the traditional transmission structure avoids wear and tear on the traditional structure, improving the overall service life and reliability. Furthermore, eliminating the traditional transmission structure significantly reduces operating noise and provides a better user experience.

[0014] The blades rotate internally, achieving a hidden blade design that reduces external risks and ensures high safety during use.

[0015] This application forms a sealed space inside, which can withstand a certain water pressure, effectively preventing water intrusion, ensuring stable operation of the motor, high reliability and long service life.

[0016] Furthermore, the sealed chamber is filled with inert gas. By filling it with inert gas, on the one hand, internal oxidation can be effectively prevented and the service life of the equipment can be extended; on the other hand, the sealed chamber has a certain internal pressure, which can counteract the external water pressure when it descends underwater, ensuring airtightness and increasing the diving depth.

[0017] Furthermore, the inert gas is nitrogen, argon, or carbon dioxide.

[0018] Furthermore, the end of the sealing cover 3 extends axially inward to form a first connecting portion 32 that can be inserted into the open end of the housing 1. One or more sealing rings 61 are provided between the outer wall of the first connecting portion 32 and the inner wall of the housing 1, and a sealing gasket 62 is provided between the end face of the sealing cover 3 and the end face of the housing 1. By adopting radial sealing and end face sealing, a multi-seal structure is formed, which further improves the sealing performance and ensures the reliability and stability of underwater propulsion.

[0019] Furthermore, the two ends of the cylindrical body 41 extend axially outward to form a second connecting part 411, and the bearing 5 is installed between the first connecting part 32 and the second connecting part 411. It is easy to manufacture and assemble, and easy to maintain in the later stage.

[0020] Furthermore, the end of the second connecting portion 411 extends axially outward to form a sealing portion, and the sealing lip of the oil seal 63 contacts the outer wall of the sealing portion, which can reduce the radial width and effectively control the overall volume.

[0021] Furthermore, a sealing sleeve 7 is fixed to the outer wall of the end of the second connecting part 411 by sealant. The sealing lip of the oil seal 63 contacts the outer wall of the sealing sleeve 7. The use of a sealing sleeve structure can reduce production costs, especially the manufacturing cost of the rotor blade, which can be made of different types of materials. It also eliminates the need for finishing steps in the production process, which not only reduces material and processing costs, but also ensures the sealing effect.

[0022] Furthermore, the inner wall of the sealing sleeve 7 is beveled, which enables automatic alignment and avoids assembly errors from affecting the sealing effect.

[0023] Furthermore, the sealing sleeve 7 is made of stainless steel or aluminum alloy, which has sufficient hardness and strength, while having low material and processing costs.

[0024] Furthermore, the outer end of the sealing cover 3 is an outwardly convex arc-shaped surface that forms a flow guide surface. This flow guide surface is used for rectification, reducing water flow turbulence loss. Under the same power, the system efficiency is improved by 8%-12%.

[0025] Furthermore, the axis of the mounting base is perpendicular to and intersects the axis of the housing 1, which enables good balance after installation.

[0026] Furthermore, the mounting base includes a first base 11 and a second base 12 coaxially arranged and interconnected. The cross-section of the first base 11 is a regular polygon, and the cross-section of the second base 12 is circular with a diameter less than or equal to the diameter of the inscribed circle of the first base 11. Multiple mounting holes are evenly distributed circumferentially at the ends of the second base 12. This facilitates overall installation and positioning. The first base is used for radial positioning to prevent rotation; correspondingly, holes are provided on the target hull or other vehicle to allow axial insertion of the first base 11, forming a radial limit. The second base 12 is used for axial positioning to ensure stable installation. This design not only simplifies the installation process and improves accuracy but also significantly enhances the stability and service life of the equipment.

[0027] Furthermore, the oil seal has two sealing lips, which further enhances the seal and ensures reliable overall operation.

[0028] This utility model discloses a sealed structure for an underwater propulsion motor. By eliminating the traditional mechanical transmission shaft system and integrating the motor rotor with the propeller, it significantly improves the overall performance of the underwater propulsion system. It employs electromagnetic field direct-drive for the propeller blades, achieving a transmission efficiency of nearly 100%, greatly reducing energy loss. Simultaneously, eliminating the traditional transmission structure avoids wear and tear on the traditional structure, extending the overall service life and ensuring high reliability. Eliminating the traditional transmission structure also significantly reduces operating noise, resulting in a better user experience. The internal rotation of the propeller blades allows for a concealed blade design, reducing external risks and enhancing operational safety. Furthermore, this application creates a sealed internal space that can withstand a certain water pressure, effectively preventing... This design prevents water intrusion, ensuring stable motor operation, high reliability, and long service life. The sealed chamber is filled with inert gas, which effectively prevents internal oxidation, extending the equipment's lifespan. Furthermore, it creates internal pressure within the chamber, counteracting external water pressure when submerged, ensuring airtightness, and increasing diving depth. The optimized sealing structure provides excellent sealing, long service life, and ensures stability and reliability during operation. This underwater propulsion motor's sealing structure is compact, powerful, highly safe, long-lasting, and operates with low noise, offering a superior user experience and wide applicability. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the sealing structure of the underwater propulsion motor of this utility model;

[0030] Figure 2 This is a cross-sectional view of the sealing structure of the underwater propulsion motor of this utility model;

[0031] Figure 3 This is a schematic diagram of the installation of the drive assembly of the sealing structure of the underwater propulsion motor of this utility model;

[0032] Figure 4 This is a longitudinal sectional view of the sealing structure of the underwater propulsion motor of this utility model;

[0033] Figure 5 for Figure 4 Enlarged view of section A. Detailed Implementation

[0034] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0035] See Figures 1-5 This utility model provides a sealing structure for an underwater propulsion motor, which includes a housing 1, a rotor blade 4, a drive assembly, and a sealing cover 3.

[0036] The housing 1 serves as an installation carrier for mounting the rotor propeller 4 drive assembly and the sealing cover 3. It is also used for connecting to the hull or other carriers. The housing 1 is a horizontally positioned cylindrical shape with open ends. A mounting seat is provided on the upper side wall of the housing 1. The axis of the mounting seat is perpendicular to and intersects the axis of the housing 1, which can achieve good balance after installation. At the same time, in the axial direction, the mounting seat is eccentric to the center of the housing 1, specifically, it is located on the side near the water inlet end.

[0037] In this application, the mounting base includes a first base body 11 and a second base body 12 coaxially arranged and connected to each other. The first base body 11 is fixedly connected to the housing 1. The cross-section of the first base body 11 is a regular polygon, preferably a regular hexagon. The second base body 12 is fixed to the end of the first base body 11. The two are coaxial. The cross-section of the second base body 12 is circular, and its diameter is less than or equal to the diameter of the inscribed circle of the first base body 11. At the same time, a plurality of mounting holes 121 are evenly distributed circumferentially at the end of the second base body 12. The mounting holes 121 are screw holes, forming a flange structure for fixed connection with the carrier. The above-mentioned mounting base facilitates the rapid installation and precise positioning of the whole. The first base body is used to achieve radial positioning to avoid rotation. Correspondingly, a hole is provided on the target hull or other carrier to accommodate the axial insertion of the first base body 11, forming a radial limit. The second base body 12 is used for axial positioning to ensure stable installation. This design not only simplifies the installation process and improves accuracy, but also greatly enhances the stability and service life of the equipment. In addition, a wire hole 10 is provided at the end of the mounting base to connect to the inner wall of the housing for threading wires.

[0038] The rotor propeller 4 includes a cylindrical body 41 coaxial with the housing 1. The cylindrical body 41 is open at both ends and is rotatably mounted inside the housing 1 via bearings 5. Multiple blades 42 are evenly distributed around the inner wall of the cylindrical body 41. When the rotor propeller rotates, the blades inside can drive the water flow to generate power.

[0039] The drive assembly includes a coil winding 21 and a permanent magnet 22. The coil winding 21 is installed on the inner wall of the housing 1 and includes an iron core made of stacked silicon steel sheets and a coil wound on the iron core. The permanent magnet 22 is embedded in the outer wall of the cylindrical body 41. There are multiple permanent magnets and they are evenly distributed around the periphery. The permanent magnet 22 and the coil winding 21 are located on the same radial plane and form magnetic coupling. The wires on the coil winding 21 pass through the wire hole 10 and extend to the outside of the housing 1 for connection with an external power source to ensure continuous power supply to the motor. A sealing plug 13 or sealant is provided in the wire hole 10 to achieve efficient sealing of the wire hole 10.

[0040] There are two sealing caps 3, which are fixed to both ends of the housing 1 by bolts. The sealing cap 3 is a circular ring structure and is coaxial with the housing 1. A sealing ring and / or sealing gasket are provided between the sealing cap 3 and the housing 1. The outer end of the sealing cap 3 is an outwardly convex arc surface, which forms a flow guiding surface. This makes the sealing cap form a fairing structure. The flow guiding surface is used for rectification and reduces water flow turbulence loss. Under the same power, the system efficiency is improved by 8%-12%.

[0041] An oil seal 63 is provided on the sealing cover 3. The sealing lip of the oil seal 63 contacts the outer wall of the cylindrical body 41 and achieves a seal.

[0042] In this application, a sealed chamber is formed between the housing 1, the rotor blade 4, and the sealing cover 3. Compared with traditional propellers, the underwater propulsion motor of this application eliminates the traditional mechanical transmission shaft system, integrating the motor rotor with the propeller. Its advantages cover efficiency, stealth, safety, reliability, and many other aspects, significantly improving the overall performance of the underwater propulsion system. Traditional propellers use bearings, gearboxes, and long shafts for transmission, resulting in mechanical losses of 10%-15%. In contrast, this application uses electromagnetic field direct drive blades, achieving a transmission efficiency of nearly 100%, greatly reducing energy loss. At the same time, eliminating the traditional transmission structure avoids wear and tear on traditional structures, extending the overall service life and improving reliability. Eliminating the traditional transmission structure also significantly reduces operating noise, resulting in a better user experience. The blades rotate internally, achieving a hidden blade design, reducing external risks and ensuring high safety. Furthermore, this application forms a sealed space internally, capable of withstanding certain water pressure, effectively preventing water intrusion, ensuring stable motor operation, high reliability, and long service life.

[0043] The sealed chamber is filled with inert gas. By filling it with inert gas, on the one hand, internal oxidation can be effectively prevented and the service life of the equipment can be extended; on the other hand, the sealed chamber has a certain internal pressure, which can counteract the external water pressure when it descends underwater, ensuring airtightness and increasing the diving depth. In this embodiment, the inert gas is nitrogen, argon or carbon dioxide, which are inexpensive and effective.

[0044] The end of the sealing cover 3 extends axially inward to form a first connecting part 32 that can be inserted into the open end of the housing 1. The first connecting part 32 is cylindrical, and its inner wall is basically in contact with the inner wall of the housing. One or more sealing rings 61 are provided between the outer wall of the first connecting part 32 and the inner wall of the housing 1. Specifically, one or more sealing ring grooves are provided on the outer wall of the first connecting part, and the sealing rings are installed in the sealing ring grooves. The structure is simple and easy to process, and it forms a seal on the radial surface. A sealing gasket 62 is provided between the end face of the sealing cover 3 and the end face of the housing 1, which forms an end face seal. Through the above structure, radial seal and end face seal are formed, which has a multiple sealing structure, further improving the sealing performance and ensuring the reliability and stability of underwater drive.

[0045] Both ends of the cylindrical body 41 extend axially outward to form a second connecting portion 411. This second connecting portion has a cylindrical structure, and the bearing 5 is installed between the first connecting portion 32 and the second connecting portion 411. It is easy to manufacture and assemble, and convenient for later maintenance. In this embodiment, the end of the second connecting portion 411 extends axially outward to form a sealing portion. The sealing lip of the oil seal 63 contacts the outer wall of the sealing portion, which can reduce the radial width and effectively control the overall volume. In order to further improve the sealing and ensure reliable operation, the oil seal has two sealing lips.

[0046] Preferably, a sealing sleeve 7 is fixed to the outer wall of the end of the second connecting part 411 with sealant. The sealing sleeve 7 has a cylindrical structure. The sealant can fix the sealing sleeve and seal it to prevent moisture from entering from the gap between the two. The outer wall of the sealing sleeve 7 forms a working surface, and the sealing lip of the oil seal 63 contacts the outer wall of the sealing sleeve 7 to form a seal. Using a sealing sleeve structure can reduce production costs, especially the manufacturing cost of the rotor blade, which can be made of different types of materials. It also eliminates the need for finishing steps in the production process, which not only reduces material and processing costs, but also ensures the sealing effect. In order to facilitate assembly and improve assembly accuracy, in this embodiment, the inner wall of the sealing sleeve 7 is inclined, and the outer wall of the second connecting part is also inclined, forming a conical structure. This can achieve automatic centering, avoid assembly errors from affecting the sealing effect, and has low manufacturing cost and good sealing effect. The sealing sleeve 7 is made of stainless steel or aluminum alloy, which has sufficient hardness and strength, and at the same time, the material cost and processing cost are low.

[0047] This utility model discloses a sealed structure for an underwater propulsion motor. By eliminating the traditional mechanical transmission shaft system and integrating the motor rotor with the propeller, it significantly improves the overall performance of the underwater propulsion system. It employs electromagnetic field direct-drive for the propeller blades, achieving a transmission efficiency of nearly 100%, greatly reducing energy loss. Simultaneously, eliminating the traditional transmission structure avoids wear and tear on traditional structures, extending the overall service life and ensuring high reliability. Eliminating the traditional structure significantly reduces operating noise, resulting in a better user experience. The internal rotation of the propeller blades allows for a concealed blade design, reducing external risks and enhancing operational safety. Furthermore, this application creates a sealed internal space capable of withstanding certain water pressure, effectively preventing... This design prevents water intrusion, ensuring stable motor operation, high reliability, and long service life. The sealed chamber is filled with inert gas, which effectively prevents internal oxidation, extending the equipment's lifespan. Furthermore, it creates internal pressure within the chamber, counteracting external water pressure when submerged, ensuring airtightness, and increasing diving depth. The optimized sealing structure provides excellent sealing, long service life, and ensures stability and reliability during operation. This underwater propulsion motor's sealing structure is compact, powerful, highly safe, long-lasting, and operates with low noise, offering a superior user experience and wide applicability.

[0048] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A sealing structure of an underwater propulsion motor, characterized by, The utility model relates to a kind of sealed rotor pump, including: Shell, as installation carrier, the shell is horizontally arranged and the cylinder of both ends open, the upper end side wall of the shell is equipped with mounting seat, and the mounting seat is equipped with mounting hole and wire hole; Rotor paddle, including the cylinder body coaxial with the shell and both ends open, the cylinder body is rotatably installed in the shell by bearing, and the inner wall of the cylinder body is circumferentially distributed with multiple paddles; Driving assembly, including coil winding installed in the inner wall of the shell and permanent magnet installed in the outer wall of cylinder body and located in the same radial plane with the coil winding, the wire on the coil winding extends to the outside of the shell after passing through the wire hole, and sealing plug or filling sealant is equipped in the wire hole; Sealing cover, two and fixed by bolt in the both ends of the shell, and sealing ring and / or sealing pad are equipped between the sealing cover and the shell; Oil seal, arranged on the sealing cover, and the sealing lip of the oil seal is in contact with the outer wall of the cylinder body and realizes sealing; Sealed chamber is formed between the shell, the rotor paddle and the sealing cover.

2. The seal structure for an underwater propulsion motor as set forth in claim 1, wherein: The sealed chamber is filled with inert gas.

3. The seal structure for an underwater propulsion motor as set forth in claim 2, wherein: The inert gas is nitrogen, argon or carbon dioxide.

4. The seal structure for an underwater propulsion motor as set forth in claim 1, wherein: The end of the sealing cover extends axially inward and forms a first connecting part that can be inserted into the open end of the shell, and one or more sealing rings are arranged between the outer wall of the first connecting part and the inner wall of the shell, and a sealing pad is arranged between the end face of the sealing cover and the end face of the shell.

5. The seal structure for an underwater propulsion motor as set forth in claim 4, wherein: The both ends of the cylinder body extend axially outward and form a second connecting part, and the bearing is installed between the first connecting part and the second connecting part.

6. The seal structure for an underwater propulsion motor as set forth in claim 5, wherein: The end of the second connecting part extends axially outward and forms a sealing part, and the sealing lip of the oil seal is in contact with the outer wall of the sealing part.

7. The seal structure for an underwater propulsion motor as set forth in claim 5, wherein: The outer wall of the end of the second connecting part is fixed with a sealing sleeve by sealant, and the sealing lip of the oil seal is in contact with the outer wall of the sealing sleeve.

8. The seal structure for an underwater propulsion motor as set forth in claim 7, wherein: The inner wall of the sealing sleeve is inclined.

9. The seal structure for an underwater propulsion motor as set forth in claim 7, wherein: The sealing sleeve is made of stainless steel or aluminum alloy.

10. The seal structure for an underwater propulsion motor as set forth in claim 1, wherein: The outer end of the sealing cover is outwardly convex arc surface and forms a flow guide surface.

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