A low-noise, detachable and lubricated heat dissipation performance good rim pump jet propeller

Abstract

The application discloses a low-noise, detachable and good-lubrication and heat-dissipation rim pump jet propeller, and belongs to the technical field of marine equipment propeller, which comprises a shell, a stator sealing mechanism is installed on the inner wall of the shell, a rotor assembly is arranged on the inner side of the stator sealing mechanism, a paddle is installed in the rotor assembly, heat-dissipation end covers are installed at both ends of the shell, the rotor assembly is rotatably connected with corresponding heat-dissipation end covers at both ends, the rotor assembly and the heat-dissipation end covers are rotatably connected through bearings, and the heat-dissipation end covers are used for heat-dissipation of the bearings. The low-noise, detachable and good-lubrication and heat-dissipation rim pump jet propeller is adopted, the cavitation and noise problems of the traditional propeller are solved, the paddle dismounting and bearing lubrication and cooling problems in the prior art are solved, and the service life of the paddle and the bearing is prolonged.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of marine equipment propeller, and particularly relates to a low-noise, detachable and good-lubrication-heat-dissipation performance rim pump jet propeller. BACKGROUND

[0002] With the increasing depletion of global fossil energy, energy saving has become the main concern of propeller research and development in today's world. Researchers from various countries have devoted themselves to improving the energy saving effect of propellers, and the requirements for propeller performance are also getting higher and higher. The disadvantages of traditional shaft-driven propellers have gradually emerged, and they have been unable to better meet the work requirements. For example, the shaft-driven propeller is axially driven, and due to the shafting vibration when the blades rotate, a large noise is generated. The blade tip and hub will make the open water efficiency low and the anti-cavitation performance poor.

[0003] There are many kinds of underwater propellers on the market at present, which can be divided into ordinary propeller, ducted propeller, pump jet propeller, rim propeller and coaxial contra-rotating propeller according to the characteristics of the propeller. Among them, the rim propeller is concerned because of its higher propelling efficiency and transmission efficiency, and becomes the darling of the times. In deep sea combat, compared with the traditional propelling system, the rim propeller has better cavitation and vibration performance, and gives the submarine more powerful concealment ability, so that the combat capability of the submarine is significantly enhanced.

[0004] In order to improve the propelling performance, a rim pump jet propeller is proposed on the market. Among them, the structure of the rim pump jet propeller disclosed in Chinese patent application (CN112874747A) is representative, which comprises a rotating shaft, a shell, a stator and a rotor. The rotating shaft is hollow and has a horn-shaped structure, and is movably installed in the end covers on both sides of the shell through bearings. The rotating shaft comprises a large end portion, a small end portion and a gradual change portion connecting the large end portion and the small end portion. The large end portion is fixedly installed with a propeller in the inner cavity, and the rotor is fixedly installed on the outer ring of the gradual change portion. The stator is fixedly installed on the shell and corresponds to the rotor. The invention combines the structural characteristics of the pipeline and the propeller, fully utilizes the Venturi effect, breaks through the conventional design, and reasonably arranges the layout. The contradiction between the high-power stator and rotor and the limited installation space in the rim pump jet propeller and the utilization of vortex energy in the pipeline are well solved. While ensuring the small size of the rim pump jet propeller, the propelling power and efficiency are greatly improved. However, the propeller blade and the ring rotor of the invention are of an integrated structure, and the replacement of the propeller blade is not considered, which greatly limits the maintenance and replacement of the propeller blade of the propeller. Moreover, the structure does not consider the lubrication and heat dissipation function of the bearing, which is easy to damage the bearing and shorten the service life of the bearing. SUMMARY

[0005] The invention aims to provide a low-noise, detachable and lubricated and heat-dissipating rim pump jet propeller, which solves the cavitation and noise problems of traditional propellers and the problems of blade disassembly and bearing lubrication and heat dissipation in the prior art, thereby prolonging the service life of the blade and the bearing.

[0006] To achieve the above-mentioned purpose, the invention provides the following scheme:

[0007] A low-noise, detachable and lubricated and heat-dissipating rim pump jet propeller, characterized in that it comprises a shell, a stator sealing mechanism is installed on the inner wall of the shell, a rotor assembly is arranged on the inner side of the stator sealing mechanism, a blade is installed inside the rotor assembly, heat-dissipating end covers are installed at both ends of the shell, the rotor assembly is rotatably connected with the corresponding heat-dissipating end cover at both ends, the rotor assembly and the heat-dissipating end cover are rotatably connected through a bearing, and the heat-dissipating end cover is used for heat dissipation of the bearing.

[0008] The rotor assembly comprises a propeller holder, five blade installation grooves are formed in the middle part of the propeller holder, each blade installation groove is uniformly and equally spaced, three threaded holes are formed on both sides of each blade installation groove, and the blade installation groove is connected with the blade through the threaded hole.

[0009] Preferably, a boss for fixing the bearing is arranged on the inner wall of the heat-dissipating end cover, a groove for weight reduction is arranged on the outer wall of the heat-dissipating end cover, a plurality of drainage openings are formed on the outer edge of the heat-dissipating end cover, each drainage opening is uniformly and equally spaced, a drainage ring is arranged on the inner side of the conduit body, and the position of the drainage ring corresponds to the position of the drainage opening.

[0010] Preferably, a shaft ring one and a shaft ring two are fixedly arranged on the propeller holder, the shaft ring one cooperates with the holder support ring, and the end of the shaft ring two is in contact with the bearing.

[0011] Preferably, a key groove is formed on the propeller holder, the key groove is located between two blade installation grooves, and the propeller holder and the permanent magnet are axially fixed through key connection.

[0012] Preferably, the diameter of one end of the propeller holder is smaller than the diameter of the other end, a bearing bushing is arranged between the small-diameter end of the propeller holder and the bearing, and the bearing bushing is made of nylon.

[0013] Preferably, one end of the holder support ring is in contact with the plane corresponding to the bearing bushing, and the other end is in contact with the plane corresponding to the permanent magnet.

[0014] Preferably, the stator sealing mechanism comprises a stator sealing shell inner cylinder, the end face of the stator sealing shell inner cylinder is in contact with the plane corresponding to the permanent magnet, the stator sealing shell inner cylinder is fixedly connected with a stator sealing shell outer cylinder, one end of the stator sealing shell outer cylinder is fixedly connected with a stator sealing shell end cover, the stator sealing shell inner cylinder is internally provided with a stator winding, one end of the stator winding is attached to the stator sealing shell inner cylinder, the other end of the stator winding is attached to the stator sealing shell outer cylinder, and the two ends of the stator winding are sealingly provided with the stator sealing shell end cover.

[0015] Preferably, the bearing is a water-lubricated tapered roller bearing made of zirconium oxide.

[0016] Compared with the prior art, the application has the following advantages and technical effects:

[0017] The propeller holder is designed to realize the hubless structure of the propeller, avoid the noise problem caused by shaft vibration during the rotation of the blade, and reduce the noise; the hubless structure has high open water efficiency and good anti-cavitation performance; the middle part of the propeller holder is provided with five blade installation grooves, and three threaded holes are uniformly designed on the two sides of each installation groove for installing the blades, which provides convenience for replacing the blades, and the individual blade and the holder can be separated, thereby reducing the cost of replacing the blades; the heat dissipation end cover is used for heat dissipation of the bearing, can introduce seawater into the running bearing for lubrication and cooling, and thereby prolong the service life of the bearing. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor:

[0019] Figure 1 It is a structural schematic diagram of a low-noise, detachable and lubricated and heat-dissipated good rim pump jet propeller of the present application;

[0020] Figure 2 It is a top view of a low-noise, detachable and lubricated and heat-dissipated good rim pump jet propeller of the present application;

[0021] Figure 3 It is a structural schematic diagram of a propeller holder of the present application;

[0022] Figure 4 It is a structural schematic diagram of a heat dissipation end cover of the present application;

[0023] Figure 5 It is a side view of a heat dissipation end cover of the present application;

[0024] Reference numerals: 1. Housing; 2. Conduit body; 3. Stator sealing mechanism; 301. Inner cylinder of stator sealing housing; 302. Stator winding; 303. Outer cylinder of stator sealing housing; 304. End cover of stator sealing housing; 4. Bearing; 5. Rotor assembly; 501. Propeller cage; 502. Blade mounting slot; 503. Shaft collar one; 504. Shaft collar two; 505. Cage support ring; 506. Keyway; 507. Permanent magnet; 6. Blade; 7. Heat dissipation end cover; 701. Boss; 702. Groove; 703. Drainage port; 8. Bearing bushing. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] like Figures 1-5 As shown, a low-noise, detachable, and well-lubricated rim pump-jet propulsion device includes a housing 1. A stator sealing mechanism 3 is installed on the inner wall of the housing 1. A rotor assembly 5 is provided inside the stator sealing mechanism 3. A blade 6 is installed inside the rotor assembly 5. Heat dissipation end caps 7 are installed at both ends of the housing 1. The rotor assembly 5 is rotatably connected to the corresponding heat dissipation end caps 7 at both ends. The rotor assembly 5 and the heat dissipation end caps 7 are rotatably connected through bearings 4. The heat dissipation end caps 7 are used to dissipate heat from the bearings 4. In addition to introducing seawater into the running bearings 4 to lubricate and cool them, thereby extending the service life of the bearings 4, the heat dissipation end caps 7 can also provide positioning and fixing support for the rotor assembly 5 and provide the required preload for the two bearings 4.

[0028] The rotor assembly 5 includes a propeller cage 501. Five blade mounting slots 502 are evenly spaced in the center of the propeller cage 501. Blades 6 are installed within these slots, achieving a hubless design by fixing the blades 6 to the propeller cage 501. Each blade mounting slot 502 has three threaded holes on both sides for mounting the blades 6. This design facilitates blade replacement; when individual blades 6 need replacement, they can be separated from the propeller cage 501 by removing the mounting screws, reducing the cost of blade replacement.

[0029] Further optimization scheme, the inner wall of the heat dissipation end cover 7 is provided with a boss 701 for fixing the bearing 4, the outer wall of the heat dissipation end cover 7 is provided with a groove 702 for weight reduction, and a plurality of drainage openings 703 are formed on the outer edge of the heat dissipation end cover 7. The number of drainage openings 703 is not limited, and the present application preferably has four. The drainage openings 703 are evenly spaced, can guide seawater into the running bearing 4 for lubrication and cooling, and can prolong the service life of the bearing 4. The inner side of the conduit body 2 is provided with a drainage ring, the position of the drainage ring corresponds to the position of the drainage opening 703, and the seawater can smoothly enter the inner channel without unnecessary resistance due to the height difference between the heat dissipation end cover 7 and the inner wall of the rotor assembly 5, thereby improving the propulsion efficiency of the rim pump jet propeller.

[0030] Further optimization scheme, the helical propeller holder 501 is fixedly provided with a shaft ring one 503 and a shaft ring two 504, the shaft ring one 503 cooperates with the holder support ring 505, the shaft ring one 503 can realize axial fixation of the rotor assembly 5 together with the holder support ring 505, and ensure that the thrust generated by the blade 6 can be transmitted along the axial direction. The end of the shaft ring two 504 is in contact with the bearing 4, so that the generated thrust can be transmitted from the helical propeller holder 501 to the bearing 4, and then transmitted to the shell 1 by the bearing 4 to provide thrust for the vehicle. Five reinforcing ribs are evenly arranged on the side of the shaft ring two 504 away from the shaft ring one 503 in the circumferential direction, which can improve the carrying capacity of the shaft ring two 504.

[0031] Further optimization scheme, the helical propeller holder 501 is provided with a key groove 506 between the two blade mounting grooves 502, and the helical propeller holder 501 and the permanent magnet 507 are axially fixed by key connection. The key connection realizes the axial fixation between the helical propeller holder 501 and the permanent magnet 507, so that the relative sliding between the permanent magnet 507 and the helical propeller holder 501 does not occur during power transmission.

[0032] Further optimization scheme, one end of the helical propeller holder 501 has a smaller diameter than the other end, a bearing bushing 8 is arranged between the small-diameter end of the helical propeller holder 501 and the bearing 4, and the bearing bushing 8 is made of nylon. In order to ensure that the permanent magnet 507 can be smoothly installed on the helical propeller holder 501, one end of the helical propeller holder 501 has a smaller diameter than the other end, and the smaller end cannot meet the cooperation requirements with the bearing 4. Therefore, the problem is solved by adding a nylon bearing bushing 8.

[0033] Further optimization scheme, one end of the holder support ring 505 is in contact with the plane corresponding to the bearing bushing 8, and plays the same role as the shaft ring two 504 in the above process during work. The other end is in contact with the plane corresponding to the permanent magnet 507, and cooperates with the shaft ring one 503 of the helical propeller holder 501 to axially fix the permanent magnet 507.

[0034] Further optimization scheme, the stator sealing mechanism 3 includes the stator sealing shell inner tube 301, the end surface of the stator sealing shell inner tube 301 is in contact with the plane corresponding to the permanent magnet 507, the stator sealing shell inner tube 301 is fixedly connected with the stator sealing shell outer tube 303, one end of the stator sealing shell outer tube 303 is fixedly connected with the stator sealing shell end cover 304, the stator sealing shell inner tube 301 is internally provided with the stator winding 302, the stator winding 302 is electrified and generates a rotating magnetic field, the stator and the rotor are in a special magnetic coupling transmission mode, the generated magnetic field drives the permanent magnet 507 to rotate, and further drives the propeller holder 501 rigidly connected with the permanent magnet 507 to rotate.The one end of the stator winding 302 is attached to the stator sealing shell inner tube 301, the other end is attached to the stator sealing shell outer tube 303, the two ends of the stator winding 302 are sealingly arranged with the stator sealing shell end cover 304, the one side of the stator winding 302 is fixedly provided with a stator winding compression rubber ring, and the other side of the stator winding 302 is fixedly provided with a stator winding fixing ring to fix the position of the stator winding 302 and prevent displacement.

[0035] The stator sealing shell inner tube 301 and the stator sealing shell outer tube 303 are fixedly connected by bolts, and the stator sealing shell outer tube 303 and the stator sealing shell end cover 304 are fixedly connected by bolts, which are hexagonal head bolts and spring washer assemblies.

[0036] Further optimization scheme, the bearing 4 adopts a water-lubricated conical roller bearing made of zirconia material, considering that the rotating part is affected by the downward gravity when the propeller is stopped, axial constraint is required during operation, which requires the bearing to be capable of bearing radial force and axial force at the same time, and considering environmental protection and design complexity, the product is designed to adopt a water-lubricated conical roller bearing made of zirconia material.

[0037] The working process of the application is as follows:

[0038] When the controller sends forward command, the stator winding 302 is energized and generates a rotating magnetic field. The generated magnetic field drives the permanent magnet 507 to rotate, and the power of the permanent magnet 507 is transmitted to the propeller holder 501 through the key, thereby driving the blades 6 to rotate along the axis. The interaction force between the blades 6 and the seawater generates a thrust force, which is transmitted to the propeller holder 501 through the blades 6, so that the propeller holder 501 has a tendency to advance in the direction of the thrust force, and then the thrust force is transmitted to the permanent magnet 507 through the shaft ring 503, and then the thrust force is transmitted to the holder support ring 505 through the permanent magnet 507, and then the thrust force is transmitted to the nylon bearing bushing 8 and the front heat dissipation end cover 7, and then the power is transmitted to the machine body through the heat dissipation end cover 7 and the conduit shell 1. When the controller sends the backward command, the propeller rotor reverses, and the thrust force transmission process is similar to the forward process.

[0039] In the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0040] The above-described embodiments are only preferred modes of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements to the technical solutions of the present application made by those skilled in the art shall fall within the protection scope determined by the claims of the present application.

Claims

1. A low-noise, detachable, and well-lubricated heat dissipation rim pump-jet propulsion device, characterized in that: The utility model provides a kind of propeller cooling device, including shell (1), stator sealing mechanism (3) is mounted in the inner wall of shell (1), rotor assembly (5) is equipped in the inside of stator sealing mechanism (3), paddle (6) is mounted in the inside of rotor assembly (5), heat dissipation end cover (7) is mounted at the both ends of shell (1), rotor assembly (5) is rotatably connected with corresponding heat dissipation end cover (7) respectively, rotor assembly (5) is rotatably connected with heat dissipation end cover (7) by bearing (4), and heat dissipation end cover (7) is used to heat dissipation of bearing (4); The rotor assembly (5) includes a propeller holder (501), the middle part of the propeller holder (501) is provided with five paddle mounting grooves (502), each of the paddle mounting grooves (502) is uniformly and equally spaced, and each of the paddle mounting grooves (502) is provided with three threaded holes on both sides, the paddle mounting grooves (502) are connected with the paddles (6) through the threaded holes. The inner wall of the heat dissipation end cover (7) is provided with a boss (701) for fixing the bearing (4), the outer wall of the heat dissipation end cover (7) is provided with a groove (702) for weight reduction, and the outer edge of the heat dissipation end cover (7) is provided with a plurality of drainage openings (703), each of the drainage openings (703) is uniformly and equally spaced, and the inner side of the catheter body (2) is provided with a drainage ring, the position of the drainage ring corresponds to the position of the drainage opening (703). The propeller holder (501) is fixedly provided with a shaft ring I (503) and a shaft ring II (504), the shaft ring I (503) cooperates with the holder support ring (505), and the end of the shaft ring II (504) contacts the bearing (4). The propeller holder (501) is provided with a key groove (506) between the two paddle mounting grooves (502), and the propeller holder (501) and the permanent magnet (507) are axially fixed by key connection. The propeller holder (501) is fixedly provided with a shaft ring I (503) and a shaft ring II (504), the shaft ring I (503) cooperates with the holder support ring (505), the shaft ring I (503) and the holder support ring (505) jointly realize the axial fixation of the rotor assembly (5), the end of the shaft ring II (504) contacts the bearing (4), so that the generated thrust is transmitted from the propeller holder (501) to the bearing (4), and then the thrust is transmitted from the bearing (4) to the shell (1); five reinforcing ribs are uniformly arranged on the side of the shaft ring II (504) away from the shaft ring I (503) in the circumferential direction, and the reinforcing ribs are used to improve the carrying capacity of the shaft ring II (504).

2. A low noise, detachable and lubricated good heat dissipation performance rim pump jet propeller according to claim 1, characterized in that: One end of the propeller holder (501) has a smaller diameter than the other end, a bearing bushing (8) is arranged between the small-diameter end of the propeller holder (501) and the bearing (4), and the bearing bushing (8) is made of nylon.

3. A low noise, demountable and lubricated good heat dissipation performance rim pump jet propeller according to claim 2, characterized in that: One end of the cage support ring (505) is in plane contact with the bearing bushing (8), and the other end is in plane contact with the permanent magnet (507).

4. A low noise, demountable and lubricated good heat dissipation performance rim pump jet propeller according to claim 3, characterized in that: The stator sealing mechanism (3) comprises a stator sealing shell inner cylinder (301), the end face of the stator sealing shell inner cylinder (301) is in plane contact with the permanent magnet (507), the stator sealing shell inner cylinder (301) is fixedly connected with a stator sealing shell outer cylinder (303), one end of the stator sealing shell outer cylinder (303) is fixedly connected with a stator sealing shell end cover (304), the stator sealing shell inner cylinder (301) is internally provided with a stator winding (302), one end of the stator winding (302) is attached to the stator sealing shell inner cylinder (301), and the other end is attached to the stator sealing shell outer cylinder (303), and the two ends of the stator winding (302) are sealingly provided with the stator sealing shell end cover (304).

5. A low noise, demountable and lubricated good heat dissipation performance rim pump jet propeller according to claim 1, characterized in that: The bearing (4) is a water-lubricated conical roller bearing made of zirconium oxide.

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