Underwater shaftless propeller

Abstract

The utility model provides an underwater shaftless thruster. The underwater shaftless thruster comprises a shell, a stator winding, a rotor propeller, a fixed limiting module and a pair of rectification reverse propellers. The stator winding is fixedly installed in the shell, the rotor propeller is rotatably installed in the stator winding through the fixed limiting modules at the two ends, and the stator winding is used for driving the rotor propeller to rotate; and the pair of rectifying reverse paddles are fixedly mounted at the two ends of the shell respectively. The shaftless propulsion technology is introduced, the stator winding is adopted to directly drive the rotor propeller, a traditional transmission shaft is omitted, the shaftless propeller has the advantages of being efficient, low in noise and resistant to winding, flexible steering and accurate propulsion control can be achieved, and the stable posture can be guaranteed in the complex water flow environment.

Description

Technical Field

[0001] This utility model relates to the field of shipbuilding and marine engineering technology, specifically to an underwater shaftless propulsion device, and more particularly to a small shaftless rim propulsion device suitable for underwater equipment. Background Technology

[0002] With the development of science and technology, the role of the ocean is being increasingly valued, and the development of the ocean has become a national development strategy. Underwater robots, as an important means of ocean development, can replace humans in performing many tasks related to ocean exploration and have received increasing attention from the country.

[0003] Underwater thrusters are a crucial component for enabling underwater robot movement. Current underwater drones suffer from poor stability. Most employ traditional shafted thrusters, which have complex mechanical structures, are susceptible to entanglement, and reduce propulsion efficiency and reliability. In complex water flow environments, they struggle to maintain stable attitude and precise control, failing to meet the ever-increasing precision requirements of underwater operations.

[0004] Patent document CN109050850B discloses a propulsion device for an underwater biomimetic robot, including a working box. A heat-conducting plate is fixedly connected inside the working box. The top of the heat-conducting plate has multiple limiting grooves, and the bottom of the heat-conducting plate is fixedly connected to a first drive motor. The output end of the first drive motor is fixedly connected to the top surface of a first drive housing. The first drive housing contains a partition and a first compression spring. This design controls the rotation and stopping of the drive blades through a motor. The drive blades are slidably connected to the first drive housing, which allows for easy adjustment of the length of the drive blades extending beyond the first drive housing, thereby improving the driving power effect. However, this design uses a traditional shafted thruster, which is difficult to maintain a stable attitude in complex water flow environments. Utility Model Content

[0005] In view of the deficiencies in the existing technology, the purpose of this utility model is to provide an underwater shaftless propulsion device.

[0006] The underwater shaftless thruster provided by this utility model includes a shell, a stator winding, a rotor propeller, a fixed limiting module, and a pair of rectifier counter-propellers.

[0007] The stator winding is fixedly installed inside the housing, and the rotor propeller is rotatably installed inside the stator winding through the fixed limiting modules at both ends. The stator winding is used to drive the rotor propeller to rotate.

[0008] A pair of rectifier propellers are respectively fixedly installed at both ends of the outer casing.

[0009] Preferably, the fixed limiting module includes a bearing rotor support sleeve and a bearing, and the rotor propeller is fixedly connected to the bearing rotor support sleeve;

[0010] The bearing rotor support sleeve is fixedly connected to the inner ring of the bearing, and the outer ring of the bearing is fixedly connected to the inner side of the housing.

[0011] Preferably, the rotor propeller includes a sleeve portion and a blade portion, wherein the blade portion is spirally disposed on the inner wall of the sleeve portion;

[0012] The top and bottom of the sleeve are respectively installed inside the bearing rotor support sleeves at both ends, and the outer wall of the sleeve is fixedly connected to the inner wall of the bearing rotor support sleeve. A magnet is installed on the outer wall of the sleeve for rotating under the drive of the stator winding.

[0013] Preferably, the inner wall of the bearing rotor support sleeve is provided with a first step protruding radially, and the top and bottom surfaces of the sleeve portion of the rotor propeller respectively abut against the first steps of the bearing rotor support sleeves at both ends;

[0014] The upper end face of the bearing rotor support sleeve located at the upper end abuts against the bottom surface of the rectifier rotor located at the upper end, and the lower end face of the bearing rotor support sleeve located at the lower end abuts against the top surface of the rectifier rotor located at the lower end.

[0015] Preferably, the outer wall of the bearing rotor support sleeve is provided with a second step protruding radially, the bearing is installed between the second step and the rectifier reverse propeller, and the inner ring of the bearing is fixedly connected to the side of the second step.

[0016] Preferably, the fixed limiting module further includes a limiting ring, which includes a radial limiting ring and an axial limiting ring;

[0017] The radial limiting ring is installed between the outer end of the second step along the radial direction and the inner wall of the housing. The axial limiting ring is installed between the radial limiting ring and the stator winding. The outer end of the second step is provided with a limiting ring bearing sleeve labyrinth portion, and a sealing pair is formed between the limiting ring bearing sleeve labyrinth portion and the radial limiting ring.

[0018] Preferably, the housing is provided with a wire outlet, through which the power lines of the stator winding extend to the outside of the housing;

[0019] An auxiliary shell corresponding to the outlet is detachably installed on the outer shell. The auxiliary shell is provided with an opening for collecting the power cord that extends through the outlet to the outside of the outer shell.

[0020] The stator winding is fixedly installed in the middle of the housing by bolts, and the rectifier rotor is fixedly installed at both ends of the housing by bolts.

[0021] Preferably, the portion of the rectifier reverse propeller corresponding to the rotor propeller sleeve is provided with a reverse propeller bearing labyrinth portion, and a sealing pair is formed between the reverse propeller bearing labyrinth portion and the rotor propeller.

[0022] The cavity between the stator winding, the rectifier propeller, and the rotor propeller is filled with a waterproof grease mixed with iron powder.

[0023] Preferably, the surface of the housing is provided with perforations, and the stator winding is nickel-plated on the outside and sealed with potting compound.

[0024] Preferably, magnets are circumferentially mounted on the outer surface of the sleeve portion of the rotor propeller, and steel strips are wound around the magnets and welded at the welding grooves. The magnets inside the steel strips are fixed by potting glue.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] This invention introduces shaftless propulsion technology, which uses stator windings to directly drive the rotor propeller, eliminating the traditional drive shaft. The shaftless propeller is characterized by high efficiency, low noise, and anti-entanglement, enabling flexible steering and precise propulsion control, and ensuring stable attitude in complex water flow environments. Attached Figure Description

[0027] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0028] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0029] Figure 2 This is a half-sectional schematic diagram of the present invention;

[0030] Figure 3 This is a schematic diagram of the assembly of the rotor propeller and the bearing rotor support sleeve in this utility model;

[0031] Figure 4 This is a side view of the rotor propeller and bearing rotor support sleeve in this utility model.

[0032] Figure 5 This is a schematic diagram of the labyrinth section of the anti-propeller bearing sleeve in this utility model;

[0033] Figure 6 This is a schematic diagram of the labyrinth section of the limiting ring bearing sleeve in this utility model.

[0034] The diagram shows:

[0035] Outer shell 1 Radial limiting ring 61

[0036] Outlet 11 Axial limiting ring 62

[0037] Stator winding 2 bolts 7

[0038] Rotor propeller 3 Auxiliary housing 8

[0039] Sleeve section 31 Bearing rotor support sleeve 9

[0040] Blade section 32 First step 91

[0041] Steel strip 33, second step 92

[0042] Welding groove 34, reverse propeller bearing sleeve labyrinth section 4-7

[0043] Rectifier propeller 4 Limiting ring bearing sleeve labyrinth section 9-6

[0044] Bearing 5 Detailed Implementation

[0045] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0046] This utility model discloses an underwater shaftless thruster, which introduces shaftless propulsion technology. It directly drives the internal rotor propeller through the stator winding, eliminating the traditional drive shaft. The shaftless thruster has the characteristics of high efficiency, low noise, and anti-entanglement. It can achieve flexible steering and precise propulsion control, and can maintain a stable attitude in complex water flow environments.

[0047] According to the underwater shaftless thruster provided by this utility model, such as Figure 1 , 2 As shown, it includes a housing 1, a stator winding 2, a rotor propeller 3, a fixed limiting module, and a pair of rectifier propellers 4; the stator winding 2 is fixedly installed inside the housing 1, and the rotor propeller 3 is rotatably installed inside the stator winding 2 through the fixed limiting modules at both ends, and the stator winding 2 is used to drive the rotor propeller 3 to rotate; the pair of rectifier propellers 4 are respectively fixedly installed at both ends of the housing 1.

[0048] During operation, the stator winding 2 is energized, which drives the rotor propeller 3 to rotate through magnetic induction, thereby generating a rotating eddy current. The rectifier propeller 4 is equipped with multiple blades that extend axially to adjust the rotating eddy current into axial flow, reduce turbulence, and achieve rectification, thereby improving propulsion efficiency.

[0049] Specifically, the fixed limiting module includes a bearing rotor support sleeve 9 and a bearing 5. The rotor propeller 3 is fixedly connected to the bearing rotor support sleeve 9. The bearing rotor support sleeve 9 is fixedly connected to the inner ring of the bearing 5, and the outer ring of the bearing 5 is fixedly connected to the inner side of the outer casing 1. The rotor propeller 3 includes a sleeve portion 31 and a blade portion 32. The blade portion 32 is spirally arranged on the inner wall of the sleeve portion 31. The top and bottom of the sleeve portion 31 are respectively installed inside the bearing rotor support sleeves 9 at both ends, and the outer wall of the sleeve portion 31 is fixedly connected to the inner wall of the bearing rotor support sleeve 9. A magnet is installed on the outer wall of the sleeve portion 31 for rotation under the drive of the stator winding 2. In a preferred embodiment, the bearing 5 can be a stainless steel bearing, an engineering plastic bearing, or a ceramic bearing, which can be flexibly replaced according to usage requirements.

[0050] Compared to the traditional method of driving the blades to rotate via a drive shaft, this application improves the specific structure of the rotor propeller 3 by designing a structure with inner blades inside the sleeve. The sleeve 31 rotates under the action of magnetic induction, which drives the blade 32 to rotate, thereby realizing a shaftless propulsion scheme.

[0051] like Figure 3 , 4 The inner wall of the bearing rotor support sleeve 9 is provided with a first step 91 protruding radially. The top and bottom surfaces of the sleeve portion 31 of the rotor propeller 3 abut against the first steps 91 of the bearing rotor support sleeves 9 at both ends. The upper end surface of the bearing rotor support sleeve 9 at the upper end abuts against the bottom surface of the rectifier propeller 4 at the upper end, and the lower end surface of the bearing rotor support sleeve 9 at the lower end abuts against the top surface of the rectifier propeller 4 at the lower end.

[0052] The outer wall of the bearing rotor support sleeve 9 is provided with a second step 92 protruding radially. The bearing 5 is installed between the second step 92 and the rectifier propeller 4, and the inner ring of the bearing 5 is fixedly connected to the side of the second step 92.

[0053] The fixed limiting module is used to realize the axial and radial positioning of each component in the underwater shaftless thruster. Specifically, the rectifier propeller 4 is fixed to the end of the outer shell 1 by radial bolts 7 to achieve radial fixation.

[0054] The outer wall of the sleeve portion of the rotor propeller 3 is interference-fitted with the inner wall of the rotor bearing support sleeve 9 to achieve relative fixation. The outer wall of the bearing support sleeve 9 abuts against the inner ring of the bearing 5. The outer ring of the bearing 5 is fixedly installed inside the outer casing 1 to achieve radial fixation of the rotor propeller 3.

[0055] The top or bottom of the sleeve portion of the rotor propeller 3 abuts against the side of the first step 91, and the bearing support sleeve 9 abuts against the rectifier propeller 4, thereby achieving axial fixation of the rotor propeller 3.

[0056] The stator winding 2 abuts against the limiting ring, and the other side of the limiting ring abuts against the outer ring of the bearing 5, and the other side of the outer ring of the bearing 5 abuts against the rectifier reverse propeller 4, thereby achieving axial fixation of the stator winding 2.

[0057] The stator winding 2 has a axial structure consisting of a rectifier rotor 4, an outer ring of bearing 5, a set of limiting rings, a stator winding 2, a set of limiting rings, an outer ring of bearing 5, and a rectifier rotor 4 in close fit. The rotor propeller 3 has a axial structure consisting of a rectifier rotor 4, an outer ring of bearing 5, an inner ring of bearing 5, a bearing rotor support sleeve 9, a rotor propeller 3, a bearing rotor support sleeve 9, an inner ring of bearing 5, an outer ring of bearing 5, and a rectifier rotor 4 in close fit. The radial fixation of the rotor propeller 3 is achieved through the cooperation of the bearing rotor support sleeve 9, the bearing 5, and the outer shell 1. In a preferred embodiment, as shown... Figure 5 , Figure 6 As shown, the portion of the rectifier reverse propeller 4 corresponding to the sleeve portion 31 of the rotor propeller 3 is provided with a reverse propeller bearing sleeve labyrinth portion 4-7, and a sealing pair is formed between the reverse propeller bearing sleeve labyrinth portion 4-7 and the rotor propeller 3; the outer end of the second step 92 is provided with a limiting ring bearing sleeve labyrinth portion 9-6, and a sealing pair is formed between the limiting ring bearing sleeve labyrinth portion 9-6 and the radial limiting ring 61. The cavity area between the stator winding 2, the rectifier reverse propeller 4 and the rotor propeller 3 is filled with waterproof grease mixed with iron powder.

[0058] The fixed limiting module also includes a limiting ring, which includes a radial limiting ring 61 and an axial limiting ring 62. The radial limiting ring 61 is installed between the outer end of the second step 92 in the radial direction and the inner wall of the outer casing 1, and the axial limiting ring 62 is installed between the radial limiting ring 61 and the stator winding 2.

[0059] The outer casing 1 is provided with a cable outlet 11, through which the power lines of the stator winding 2 extend to the outside of the outer casing 1. An auxiliary casing 8 corresponding to the cable outlet 11 is detachably installed on the outer casing 1. The auxiliary casing 8 has an opening for collecting the power lines extending to the outside of the outer casing 1 through the cable outlet 11. The stator winding 2 is fixedly installed in the middle of the outer casing 1 by bolts 7, and the rectifier propeller 4 is fixedly installed at both ends of the outer casing 1 by bolts 7.

[0060] By detachably mounting the stator winding 2 and the rectifier propeller 4 onto the housing 1 via bolts 7, a modular design for the underwater shaftless thruster is achieved. All parts can be repaired and replaced at any time, and the coaxiality and stability of the thruster are ensured by the fixed limit module.

[0061] The surface of the outer casing 1 is perforated; the stator winding 2 is nickel-plated and sealed with potting compound; magnets are circumferentially mounted on the outer surface of the rotor propeller 3, preferably, as shown below. Figure 4 As shown, the magnet is wrapped with a steel strip 33 and welded at the welding groove 34. The magnet inside the steel strip 33 is fixed by potting glue. By plating the stator winding 2 with nickel and sealing it with potting glue, its service life can be significantly improved. By adopting a hollow design for the outer shell 1, its heat dissipation performance can be significantly enhanced. At the same time, the disassembly and installation process is simple, the structure is reliable, and it is ensured that the thruster can operate stably and efficiently in various complex underwater environments.

[0062] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0063] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. An underwater shaftless thruster, characterized in that, It includes a housing (1), a stator winding (2), a rotor propeller (3), a fixed limiting module, and a pair of rectifier counterspindles (4); The stator winding (2) is fixedly installed inside the housing (1), and the rotor propeller (3) is rotatably installed inside the stator winding (2) through the fixed limiting modules at both ends. The stator winding (2) is used to drive the rotor propeller (3) to rotate. A pair of the rectifier propellers (4) are fixedly installed at both ends of the outer casing (1).

2. The underwater shaftless thruster according to claim 1, characterized in that, The fixed limiting module includes a bearing rotor support sleeve (9) and a bearing (5), and the rotor propeller (3) is fixedly connected to the bearing rotor support sleeve (9). The bearing rotor support sleeve (9) is fixedly connected to the inner ring of the bearing (5), and the outer ring of the bearing (5) is fixedly connected to the inner side of the outer shell (1).

3. The underwater shaftless thruster according to claim 2, characterized in that, The rotor propeller (3) includes a sleeve portion (31) and a blade portion (32), wherein the blade portion (32) is spirally disposed on the inner wall of the sleeve portion (31); The top and bottom of the sleeve (31) are respectively installed inside the bearing rotor support sleeve (9) at both ends, and the outer wall of the sleeve (31) is fixedly connected to the inner wall of the bearing rotor support sleeve (9). The outer wall of the sleeve (31) is equipped with a magnet for rotating under the drive of the stator winding (2).

4. The underwater shaftless thruster according to claim 3, characterized in that, The inner wall of the bearing rotor support sleeve (9) is provided with a first step (91) protruding radially, and the top and bottom surfaces of the sleeve portion (31) of the rotor propeller (3) abut against the first step (91) of the bearing rotor support sleeve (9) at both ends respectively. The upper end face of the bearing rotor support sleeve (9) located at the upper end abuts against the bottom surface of the rectifier reverse propeller (4) located at the upper end, and the lower end face of the bearing rotor support sleeve (9) located at the lower end abuts against the top surface of the rectifier reverse propeller (4) located at the lower end.

5. The underwater shaftless thruster according to claim 3, characterized in that, The outer wall of the bearing rotor support sleeve (9) is provided with a second step (92) protruding radially. The bearing (5) is installed between the second step (92) and the rectifier reverse propeller (4), and the inner ring of the bearing (5) is fixedly connected to the side of the second step (92).

6. The underwater shaftless thruster according to claim 5, characterized in that, The fixed limiting module also includes a limiting ring, which includes a radial limiting ring (61) and an axial limiting ring (62); The radial limiting ring (61) is installed between the outer end of the second step (92) in the radial direction and the inner wall of the outer shell (1). The axial limiting ring (62) is installed between the radial limiting ring (61) and the stator winding (2). The outer end of the second step (92) is provided with a limiting ring bearing sleeve labyrinth part (9-6), and a sealing pair is formed between the limiting ring bearing sleeve labyrinth part (9-6) and the radial limiting ring (61).

7. The underwater shaftless thruster according to claim 1, characterized in that, The outer casing (1) is provided with a wire outlet (11), and the power line of the stator winding (2) extends to the outside of the outer casing (1) through the wire outlet (11); An auxiliary shell (8) corresponding to the outlet (11) is detachably installed on the outer shell (1). The auxiliary shell (8) is provided with an opening for collecting the power cord that extends through the outlet (11) to the outside of the outer shell (1). The stator winding (2) is fixedly installed in the middle of the housing (1) by bolts (7), and the rectifier reverse propeller (4) is fixedly installed at both ends of the housing (1) by bolts (7).

8. The underwater shaftless thruster according to claim 3, characterized in that, The part of the rectifier reverse propeller (4) corresponding to the sleeve part (31) of the rotor propeller (3) is provided with a reverse propeller bearing sleeve labyrinth part (4-7), and a sealing pair is formed with the rotor propeller (3) through the reverse propeller bearing sleeve labyrinth part (4-7); The cavity between the stator winding (2), the rectifier propeller (4) and the rotor propeller (3) is filled with a waterproof grease mixed with iron powder.

9. The underwater shaftless thruster according to claim 1, characterized in that, The surface of the outer shell (1) is provided with a hollowed-out design, and the stator winding (2) is nickel-plated on the outside and sealed with potting compound. The outer surface of the rotor propeller (3) is circumferentially mounted with magnets. The magnets are wrapped with steel strips (33) and welded at the welding groove (34). The magnets inside the steel strips (33) are fixed by potting glue.

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