Underwater shaftless propulsion motor with water lubrication structure

Abstract

The utility model relates to the field of propulsion motors, in particular to an underwater shaftless propulsion motor with a water lubrication structure. Comprising a casing, a stator iron core and an annular rotating body are arranged in the casing, a rotor iron core is arranged on the rotating body, water-lubricated bearings are arranged on two sides of the rotating body, water grooves are formed in annular surfaces of the water-lubricated bearings, flow guide covers are arranged on two sides of the casing, and ladder rings are arranged on the flow guide covers in a close fit mode. The surface of the water tank drives water flow to form a rotating water film, and the water film enables the rotating body to suspend in the motor when the rotating body rotates. The design of the water lubricated bearing and the ladder ring enables the axial and radial surfaces of the water lubricated bearing and the ladder ring to be supported by water films, the function of replacing a ball bearing is achieved, the surface of the water lubricated bearing with the water tank drives water flow to form a rotating water film on the ring surface after the rotor rotates, the whole motor is simple in structure, and the assembly requirement is lower than that of a conventional waterproof structure motor.

Description

Technical Field

[0001] This utility model relates to the field of propulsion motors, and in particular to a water-lubricated underwater shaftless propulsion motor. Background Technology

[0002] There are two main challenges with existing underwater shaftless propulsion motors with conventional bearing structures. First, the larger the power and the larger the outer diameter of the shaftless underwater motor, the larger the bearings required. Large bearings are not only more expensive but also have limitations on speed. Second, large bearings are generally made of iron-based materials, and the motor interior needs to be waterproofed when used underwater. Waterproof designs have limited waterproofing depth and require waterproof reliability testing, increasing the potential failure risk and adding to the product testing process.

[0003] Therefore, it is particularly important to design a water-lubricated underwater shaftless propulsion motor that is corrosion-resistant, requires no ball bearings, has a simple structure, and is easy to assemble. Utility Model Content

[0004] This application provides a water-lubricated underwater shaftless propulsion motor, which adopts the following technical solution:

[0005] A water-lubricated underwater shaftless propulsion motor includes a housing, a stator core and an annular rotating body inside the housing, a rotor core on the rotating body, water-lubricated bearings on both sides of the rotating body, water grooves on the annular surface of the water-lubricated bearings, and flow guides on both sides of the housing. The flow guides are fitted with trapezoidal rings. When the rotating body rotates the water-lubricated bearings, the surface of the water grooves drives the water flow to form a rotating water film. The water film enables the rotating body to suspend inside the motor as it rotates.

[0006] Optionally, blades are provided on the inner ring surface of the rotating body.

[0007] Optionally, a permanent magnet is provided on the rotor core.

[0008] Optionally, the water-lubricated bearing has a raised portion, and the outer surface of the water-lubricated bearing has a misaligned water groove; the trapezoidal ring has a recessed portion, and the recessed portion of the trapezoidal ring is located on the raised portion of the water-lubricated bearing.

[0009] Optionally, the recessed portion of the ladder ring has a smooth surface.

[0010] Optionally, an energized coil assembly is wound inside the stator core, and the surface of the energized coil assembly is coated with paint for waterproofing.

[0011] Optionally, the water-lubricated bearing and the ladder ring can be made of wear-resistant materials such as graphite or polytetrafluoroethylene.

[0012] Optionally, the housing is provided with a protrusion, and a wire storage groove is provided inside the protrusion.

[0013] Optionally, the cable storage trough is equipped with a cable pressing cover, with a cable outlet hole in the middle of the cable pressing cover and an installation hole.

[0014] Optionally, the radial distance between the water-lubricated bearing and the ladder ring is smaller than the radial distance between the rotor core and the stator core.

[0015] Compared with existing technologies, the advantages of this invention are as follows: This device adopts a water-lubricated bearing and a trapezoidal ring design. A water groove is provided on the water-lubricated bearing, and the surface of the trapezoidal ring is made smooth, allowing water flow. This design of the water-lubricated bearing and trapezoidal ring ensures that water films are present on both the axial and radial surfaces, effectively replacing the function of ball bearings. When the rotor rotates, the surface of the water-lubricated bearing with the water groove drives water flow, forming a rotating water film on the ring surface. The overall structure is simple, and the assembly requirements are lower than those of conventional waterproof motors. Furthermore, the entire internal structure of the device is waterproofed, extending the overall service life of the device. Compared with existing technologies, this device does not require specialized waterproofing treatment, reducing the need for multiple waterproofing inspection processes and saving time and effort. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be discussed below. Obviously, the technical solutions described in conjunction with the accompanying drawings are only some embodiments of this utility model. For those skilled in the art, other embodiments and their accompanying drawings can be obtained from the embodiments shown in these drawings without creative effort.

[0017] Figure 1 This is the overall structure of this utility model.

[0018] Figure 2 This is an exploded schematic diagram of the pressure line cover of this utility model.

[0019] Figure 3 This is an exploded view of this utility model.

[0020] Figure 4 This is a schematic diagram of the water-lubricated bearing of this utility model.

[0021] Figure 5 This is a cross-sectional schematic diagram of the present invention.

[0022] Figure 6 This is a three-dimensional cross-sectional view of the present invention.

[0023] Figure 7 This is an enlarged cross-sectional schematic diagram of the present invention.

[0024] In the diagram: 1. Draft shield; 2. Wire clamp cover; 3. Ladder ring; 4. Water-lubricated bearing; 5. Rotating body; 6. Blade; 7. Rotor core; 8. Permanent magnet; 9. Stator core; 10. Housing; 11. Wire storage trough. Detailed Implementation

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

[0026] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model 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 utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] An embodiment of this utility model provides a water-lubricated underwater shaftless propulsion motor.

[0029] Example: Figures 1-7As shown, a water-lubricated underwater shaftless propulsion motor includes a housing 10, which is annular. A stator core 9 is disposed on the inner annular surface of the housing 10. An annular rotating body 5 is disposed on the inner ring of the housing 10, and blades 6 are disposed on the inner annular surface of the rotating body 5. A rotor core 7 is fixedly disposed on the outer annular surface of the rotating body 5, and a permanent magnet 8 is disposed on the rotor core 7. The permanent magnet 8 is disposed together with the rotor core 7. A water-lubricated bearing 4 is fixedly disposed on the outer annular surface of the rotating body 5, and the water-lubricated bearing 4 is correspondingly disposed on both sides of the rotating body 5. The water-lubricated bearing 4 has protruding parts, and misaligned parts are provided on the outer surface of the water-lubricated bearing 4. A water tank; a trapezoidal ring 3 is provided on the side of the water-lubricated bearing 4. The trapezoidal ring 3 has a recessed part, which is located on the protruding part of the water-lubricated bearing 4. The surface of the recessed part of the trapezoidal ring 3 is smooth. There is a gap between the recessed part of the trapezoidal ring 3 and the protruding part of the water-lubricated bearing 4. The water-lubricated bearing 4 and the trapezoidal ring 3 are made of wear-resistant materials such as graphite or polytetrafluoroethylene. The side of the trapezoidal ring 3 is set on the flow guide 1, so the trapezoidal ring 3 is fixed on the flow guide 1. The flow guide 1 is fixedly connected to the housing 10 by bolts. The rotating body 5 is set inside the housing 10. There is a gap between the rotor core 7 and the stator core 9 on the outer ring surface of the rotating body 5.

[0030] The stator core 9 is internally wound with an array of energized coils. These coils are coated with waterproof enamel, effectively waterproofing the entire coil assembly. Further waterproofing is achieved by covering any exposed iron parts of the stator core 9 with adhesive. This prevents water from entering the stator core 9 and also provides underwater corrosion protection, preventing water from corroding the surface of the stator core 9 and increasing its service life. Both the rotor core 7 and the permanent magnet 8 are also waterproofed.

[0031] A protrusion is provided on the side of the housing 10, and a wire storage groove 11 is provided inside the protrusion. The enameled coil extending from the stator core 9 is stored in the wire storage groove 11. The coil assembly is fixed with glue. After the coil assembly is fixed, a wire clamping cover 2 is provided on top of the wire storage groove 11 to cover and fix it. A cable outlet hole is provided in the middle of the wire clamping cover 2. The wire extending from the wire storage groove 11 is led out from the cable outlet hole. Mounting holes are provided on the wire clamping cover 2, and fixing holes corresponding to the mounting holes are also provided around the wire storage groove 11. The connection is fixed with bolts. The connection between the fixed wire storage groove 11 and the wire clamping cover 2 is sealed for waterproofing. After the wire is led out from the cable outlet hole, it is sealed to prevent water from entering. The led-out wire is connected to an external power supply.

[0032] like Figures 6-7As shown, the radial distance between the water-lubricated bearing 4 and the ladder ring 3 is smaller than the radial distance between the rotor core 7 and the stator core 9. This arrangement allows the water-lubricated bearing 4 and the ladder ring 3 to contact each other when the entire motor is placed normally, while the rotor core 7 and the stator core 9 do not contact each other. At the same time, the inner diameter of the ladder ring 3 is larger than the inner diameter of the guide shroud 1. Therefore, there is a distance difference between the surface of the ladder ring 3 and the inner ring surface of the guide shroud 1, which allows water to enter the motor more effectively.

[0033] Working principle: This device needs to be used in water. Under normal circumstances, when the equipment is not running, the rotating body 5 inside the motor is subjected to downward force due to gravity. Also, because the radial distance between the water-lubricated bearing 4 and the ladder ring 3 inside the motor is smaller than the radial distance between the rotor core 7 and the stator core 9, the water-lubricated bearing 4 is in contact with the ladder ring 3, keeping the rotating body 5 stable. In this state, there is a gap between the stator core 9 and the rotor core 7 of the rotating body 5, and they are not in contact.

[0034] When the motor enters the water, water will enter the motor because the inner diameters of the ladder ring 3 and the guide shroud 1 are different. After the motor is filled with water, it will start when powered on. The energized coil group in the stator core 9 inside the housing 10 will generate a magnetic field. The magnetic field will act on the rotor core 7, causing the rotor core 7 to rotate. The permanent magnet 8 on the rotor core 7 will enhance the rotation of the rotor core 7. Because the water-lubricated bearing 4 on the rotating body 5 is in contact with the ladder ring 3 at this time, there will be friction between the contact surface of the water-lubricated bearing 4 and the ladder ring 3 when the rotating body 5 rotates. Therefore, the water-lubricated bearing 4 and the ladder ring 3 are made of wear-resistant materials to reduce the damage to the equipment caused by friction. A water groove is provided on the water-lubricated bearing 4. Therefore, when the water-lubricated bearing 4 rotates, the water groove on the water-lubricated bearing 4 will drive the water flow to form a rotating water film on the ring surface. The thickness of the water film is greater than 0 within a certain pressure range. In this way, there is a water film between the water-lubricated bearing 4 and the ladder ring 3, which can prevent the surface contact between the water-lubricated bearing 4 and the ladder ring 3, thereby realizing the function of replacing the ball bearing. At the same time, the graphite and polytetrafluoroethylene materials themselves are not afraid of corrosion. The overall structure is simple and the assembly requirements are lower than those of conventional waterproof structure motors. Furthermore, the water-lubricated bearing 4 and the ladder ring 3 have a flow channel on one side and a smooth surface on the other side. While driving the water flow, it can also avoid jamming caused by having water grooves on both ring surfaces.

[0035] To prevent rotor rubbing inside the motor, the water-lubricated bearing 4, stator rotor 9, and guide shield 1 are assembled using a tight-fitting method. The housing 10 is made of corrosion-resistant material to prevent corrosion in water.

[0036] Small holes can be provided on the surface of the housing 10. This design can be selected when the water in which the motor is used has a lot of mud and sand.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and not restrictive in all respects. The scope of this invention is defined by the appended claims, not by the foregoing description, and is therefore intended to encompass all variations falling within the meaning and scope of equivalents of the claims. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A water-lubricated structural underwater shaftless propulsion motor, characterized by: The application relates to a water-lubricated motor, which comprises a casing (10), a stator core (9) and an annular rotating body (5) arranged in the casing (10), a rotor core (7) arranged on the rotating body (5), water-lubricated bearings (4) arranged on both sides of the rotating body (5), water grooves arranged on the ring surface of the water-lubricated bearings (4), a flow guide cover (1) arranged on both sides of the casing (10), and a ladder ring (3) tightly arranged on the flow guide cover (1). When the rotating body (5) rotates the water-lubricated bearings (4), the water grooves on the surface of the water-lubricated bearings (4) drive water flow to form a rotating water film, and the water film realizes the suspension of the rotating body (5) in the motor when the rotating body (5) rotates.

2. A water-lubricated structural underwater shaftless propulsion electric motor according to claim 1, characterized in that: Paddles (6) are arranged on the inner ring surface of the rotating body (5).

3. A water-lubricated structural underwater shaftless propulsion motor according to claim 1, characterized in that: Permanent magnets (8) are arranged on the rotor core (7).

4. A water-lubricated structural underwater shaftless propulsion motor according to claim 1, characterized in that: The water-lubricated bearings (4) are provided with protruding parts, and the outer surface of the water-lubricated bearings (4) is provided with staggered water grooves; the ladder ring (3) is provided with a recessed part, and the recessed part of the ladder ring (3) is arranged on the protruding part of the water-lubricated bearings (4).

5. A water-lubricated structural underwater shaftless propulsion motor according to claim 4, characterized in that: The surface of the recessed part of the ladder ring (3) is smooth.

6. A water-lubricated structural underwater shaftless propulsion motor according to claim 1, characterized in that: The stator core (9) is wound with a power coil group, and the surface of the power coil group is coated with waterproof paint.

7. A water-lubricated structural underwater shaftless propulsion motor according to claim 1, characterized in that: The water-lubricated bearings (4) and the ladder ring (3) are made of graphite or polytetrafluoroethylene wear-resistant materials.

8. A water-lubricated structural underwater shaftless propulsion motor according to claim 6, characterized in that: A protruding block is arranged on the casing (10), and a wire storage groove (11) is arranged in the protruding block.

9. A water-lubricated structural underwater shaftless propulsion motor according to claim 8, characterized in that: A wire pressing cover (2) is arranged on the wire storage groove (11), a cable outlet hole is arranged at the middle position of the wire pressing cover (2), and mounting holes are arranged on the wire pressing cover (2).

10. A water-lubricated structural underwater shaftless propulsion motor according to claim 1, characterized in that: The radial distance between the water-lubricated bearings (4) and the ladder ring (3) is smaller than the radial distance between the rotor core (7) and the stator core (9).

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