Shaftless rotor structure for an underwater propeller

Abstract

The utility model discloses an underwater propeller's no -shaft rotor structure, including inner shell, permanent magnet and blade, the inner shell is the pipe body that has the fluid passageway in the middle part, the permanent magnet is equipped with a plurality, and interval distribution along the outer peripheral wall of inner shell, the blade is equipped with a plurality, and locates the inner wall of inner shell, the blade extends from the inner wall of pipe body to the axle core. In actual design, still include the shell, wherein the shell is equipped with stator (magnetic inductance coil) and also presents the pipe body shape, and the shell is equipped with the drive passageway, and the inner shell is located in the drive passageway, and can rotate relative to the drive passageway, wherein the inner shell is the integral of rotation axis and rotor, can provide greater torque therefore, reduces the wear and tear, the inner extension setting of blade not only considers the water flow efficiency, but also considers the ability of foreign matter processing, even if the blade is hooked to the foreign matter in the operation process, also can not easily influence the normal rotation of rotor, effectively improves the rotor operation stability, also improves its service life (that is smaller wear and tear).

Description

Technical Field

[0001] This utility model relates to the field of underwater propulsion, and in particular to a shaftless rotor structure for an underwater propulsion. Background Technology

[0002] The underwater special propulsion motor is an electric propulsion device that incorporates fluid dynamics design, motor design, and material selection. Its novel and unique structure possesses superior characteristics, making it ideal for use as a propulsion system for underwater robots. It achieves motion of the vehicle through the rotation of the impeller and the reverse propulsion of the fluid, such as onboard skateboards, underwater robots, and submersibles (and can also be used for divers).

[0003] For example, Chinese patent CN202411129920.3 connects the hub motor to the propeller blades via a coupling, thereby achieving relative rotation. However, this structure has the following problems:

[0004] 1. Foreign objects can easily get caught on the blades, thus affecting the rotation of the motor;

[0005] 2. When foreign objects get caught on the blades, the torque resistance increases, which makes the shaft more prone to wear and thus affects the service life of the underwater thruster.

[0006] 3. Therefore, the structure is equipped with an underwater thruster shell to prevent foreign objects from entering, but this also requires intermittent cleaning or rinsing, making it rather inconvenient to use.

[0007] Of course, there are also structures that use shaftless rotors, such as Chinese patent 202323180229.1, but their structures are more complex, and therefore their production costs are also higher. Utility Model Content

[0008] The main purpose of this utility model is to propose a shaftless rotor structure for underwater thrusters, which aims to improve the existing rotor structure of underwater thrusters, thereby making them easier to install, effectively reducing the snagging of foreign objects, and improving the user experience.

[0009] To achieve the above objectives, this utility model proposes a shaftless rotor structure for an underwater thruster, comprising:

[0010] Inner shell, wherein the inner shell is a tube with a fluid channel in the middle;

[0011] Permanent magnets, wherein multiple permanent magnets are provided and are spaced apart along the outer peripheral wall of the inner shell;

[0012] The blades are provided in multiples and are located on the inner wall of the inner shell, extending from the inner wall of the tube towards the axis.

[0013] In the actual design, it also includes an outer shell, which has a stator (magnetic coil) and is also tubular. The outer shell has a drive channel, and the inner shell is located in the drive channel and can rotate relative to the drive channel. The inner shell is an integral part of the shaft and rotor, so it can provide greater torque and reduce wear.

[0014] Meanwhile, the inner extension of the blades not only takes into account water flow efficiency, but also the ability to handle foreign objects. Even if the blades get caught on foreign objects during operation, it will not easily affect the normal rotation of the rotor, effectively improving the rotor's operational stability and extending its service life (i.e., less wear). Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the rotor;

[0016] Figure 2 This is a schematic diagram of the rotor in plan view;

[0017] Figure 3 Schematic diagram of rotor half section Figure 1 ;

[0018] Figure 4 Schematic diagram of rotor half section Figure 2 ;

[0019] Figure 5 Cross-section of underwater thruster Figure 1 ;

[0020] Figure 6 Cross-section of underwater thruster Figure 2 .

[0021] In the picture,

[0022] 1 represents the outer casing, and 10 represents the drive channel.

[0023] 2 represents the inner shell, and 20 represents the fluid channel.

[0024] 3 represents the blade, 30 represents the spacing, 31 represents the clearance area, 32 represents the curved edge, and 33 represents the connecting end.

[0025] 41 is the stator (magnetic induction coil), and 42 is the rotor (permanent magnet).

[0026] 51 is the fluid inlet end, and 52 is the fluid outlet end.

[0027] 6 represents the slot, and 61 represents the bearing. Detailed Implementation

[0028] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0029] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0030] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0031] like Figures 1 to 5 As shown, a shaftless rotor structure for an underwater thruster includes:

[0032] Inner shell 2, wherein the inner shell 2 is a tube with a fluid channel 20 in the middle;

[0033] Permanent magnets, wherein multiple permanent magnets are provided and are spaced apart along the outer peripheral wall of the inner shell 2;

[0034] The blade 3 is provided in multiples and is located on the inner wall of the inner shell 2. The blade 3 extends from the inner wall of the tube towards the axis.

[0035] In the actual design, it also includes a housing 1, which is provided with a stator (magnetic coil) and is also in the shape of a tube. The housing 1 is provided with a drive channel 10, and the inner housing 2 is located in the drive channel 10 and can rotate relative to the drive channel 10. The inner housing 2 is an integral part of the shaft and rotor, so it can provide greater torque and reduce wear.

[0036] Meanwhile, the inner extension of blade 3 not only takes into account water flow efficiency, but also the ability to handle foreign objects. Even if blade 3 gets caught on foreign objects during operation, it will not easily affect the normal rotation of the rotor, effectively improving the rotor's operational stability and extending its service life (i.e., less wear).

[0037] Specifically, the permanent magnet consists of S-pole magnets and N-pole magnets distributed adjacent to each other.

[0038] This product can be applied to structures such as skateboards, submersibles, robots, and underwater propulsion devices.

[0039] More specifically, the adjacent blades 3 are spaced 30 apart along the radial cross-section, which allows for a larger range of fluid output, thereby effectively hooking foreign objects on the wall onto the blades 3.

[0040] In this embodiment of the invention, a clearance zone 31 is provided at the ends of multiple blades 3 away from the inner shell 2. The clearance zone 31 can form a predetermined fluid pressure, thereby forming a vortex at the location of the clearance zone 31, thereby increasing the fluid pressure.

[0041] Specifically, the blade 3 is arc-shaped and extends with a curved surface; the blade 3 includes two arc-shaped edges 32, which simplifies the manufacturing process and allows for a higher fluid flow rate.

[0042] The blade 3 and the inner shell 2 are integrally formed, thus resulting in better structural stability.

[0043] In this embodiment of the utility model, the end wall of the arc-shaped edge 32 is a wedge-shaped surface and / or a vertical surface. In the actual design, there are four blades 3. The two sides of one blade 3 can be wedge-shaped, and the other blade 3 can be a wedge-shaped surface and a vertical surface, so as to meet the flow of fluid. The wedge-shaped surface can be an arc-shaped chamfer, which reduces the snagging of foreign objects while increasing the fluid pressure.

[0044] Specifically, a connecting end 33 is provided between the two arc-shaped edges 32. The connecting end 33 is an arc-shaped chamfer or a vertical surface, which forms an empty space 31 while improving the structural strength of the blade 3, avoiding deformation of its material, and reducing the snagging of foreign objects.

[0045] The smaller connecting end 33 makes it less likely for foreign objects to get caught, which is a streamlined design.

[0046] In this embodiment of the utility model, the permanent magnet and the inner shell are integrally injection molded or the permanent magnet is bonded to the inner shell. The integral injection molding structure is the most stable and can also ensure the sealing of the permanent magnet and prevent rusting.

[0047] The bonding method can be either adhesive tape or filler glue.

[0048] Specifically, the inner shell 2 is elongated, the fluid channel 20 includes a fluid inlet end 51 and a fluid outlet end 52, and the blade 3 is located near the fluid outlet end. The inner shell 2 near the fluid inlet end is a hollow cavity. When the blade 3 rotates, it can form a vortex in the hollow cavity, thereby driving the fluid in the space to flow.

[0049] In this embodiment of the utility model, the two ends of the outer wall of the inner shell are provided with a tapered groove 6. The groove is used to install the bearing 61, which facilitates the installation of the bearing, provides a more stable support effect, and improves the structural stability.

[0050] Of course, the number of slots is not limited to two or more, and it can also be a single long strip, such as a ceramic bearing, which can not affect the operation of the permanent magnet while ensuring stable rotation.

[0051] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A shaftless rotor structure for an underwater thruster, characterized in that, include: Inner shell, wherein the inner shell is a tube with a fluid channel in the middle; Permanent magnets, wherein multiple permanent magnets are provided and are spaced apart along the outer peripheral wall of the inner shell; The blades are provided in multiples and are disposed on the inner wall of the inner shell, and the blades extend from the inner wall of the tube towards the axis. There is a spacing between adjacent blades along the radial cross-section; Multiple blades have air-retaining sections at their ends furthest from the inner shell; The blade is arc-shaped and extends with a curved surface; the blade includes two arc-shaped edges; the end walls of the arc-shaped edges are wedge-shaped surfaces and / or vertical surfaces; a connecting end is provided between the two arc-shaped edges, and the connecting end is an arc-shaped chamfer or a vertical surface; The permanent magnet and the inner shell are integrally injection molded or the permanent magnet is bonded to the inner shell; The inner shell has tapered grooves at both ends of its outer wall, which are used to install bearings.

2. The shaftless rotor structure of the underwater thruster as described in claim 1, characterized in that: The permanent magnet consists of S-pole magnets and N-pole magnets distributed adjacent to each other.

3. The shaftless rotor structure of the underwater thruster as described in claim 1, characterized in that: The inner shell is elongated, the fluid channel includes a fluid inlet end and a fluid outlet end, and the blades are located near the fluid outlet end.

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