Water-lubricated rim underwater shaftless propulsion motor

Abstract

The utility model relates to the field of drivers, in particular to an underwater shaftless propulsion motor with a water-lubricated rim. Comprising a casing, a stator iron core and an annular rotating body are arranged in the casing, an electrified coil group is arranged in the stator iron core, a rotor iron core is arranged on the rotating body, paddles are arranged on the inner annular surface of the rotating body, bearings are arranged on two sides of the rotating body, the bearings are fixedly connected with the casing, and flow guide covers are arranged on two sides of the casing. The electrified coil group is electrified to generate a magnetic field to drive the rotor core to rotate to realize rotation of the rotating body, and the blades on the rotating body rotate to drive water flow to flow. The internal structure of the whole machine is subjected to waterproof treatment, no sealing ring needs to be additionally arranged, materials needed for assembly are reduced, the assembly production time is shortened, the weight of the whole machine is reduced, and the underwater working power of the motor can be improved.

Description

A water-lubricated rim underwater shaftless propulsion motor Technical Field

[0001] This utility model relates to the field of drive systems, and more particularly to a water-lubricated rimmed underwater shaftless propulsion motor. Background Technology

[0002] The assembly of conventional underwater shaftless propulsion motors is quite difficult. In addition, because the propulsion motor operates underwater, it needs to be waterproofed. Furthermore, depending on the motor's intended use, waterproof performance testing is also required. These two processes are time-consuming and labor-intensive, increasing the risk of product failure, adding testing steps, and raising production costs.

[0003] Therefore, it is possible to design an underwater shaftless propulsion motor that does not require internal sealing, which can significantly reduce the additional heat generation and power consumption caused by sealing friction during no-load operation. Summary of the Invention

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

[0005] A water-lubricated rimmed underwater shaftless propulsion motor includes a housing, a stator core and an annular rotating body inside the housing, an energized coil assembly inside the stator core, a rotor core on the rotating body, blades on the inner annular surface of the rotating body, bearings on both sides of the rotating body, the bearings being connected and fixed to the housing, and flow guides on both sides of the housing. When the energized coil assembly is energized, a magnetic field is generated, which drives the rotor core to rotate, thus rotating the rotating body. The rotation of the blades on the rotating body drives the flow of water.

[0006] Optionally, the stator core is provided with a potting structure on both sides to enclose the stator core and prevent it from being corroded by water and rusting.

[0007] Optionally, the bearing is a zirconia ceramic bearing, and the internal cage of the zirconia ceramic bearing is made of polytetrafluoroethylene material.

[0008] Optionally, permanent magnets are provided on the rotor core.

[0009] Optionally, the rotor core and permanent magnet on the rotating body are coated with paint for waterproofing to prevent corrosion from contact with water.

[0010] Optionally, a protrusion is provided on the side of the housing, and a wire storage groove is provided inside the protrusion. The enameled coil extending from the stator core is stored in the wire storage groove. After the coil group is fixed, a wire pressing cover is provided above the wire storage groove to cover and fix it.

[0011] Optionally, a cable outlet hole is provided in the middle of the cable pressure cover. The cable extending from the cable storage trough is led out from the cable outlet hole. An installation hole is provided on the cable pressure cover, and a fixing hole corresponding to the installation hole is also provided around the cable storage trough. The connection and fixation are achieved by bolts.

[0012] Optionally, there may be a gap between the rotor core and the stator core on the outer ring surface of the rotating body.

[0013] Optionally, the outer ring of the bearing is configured to contact the inner ring of the housing, and the inner ring of the bearing is configured to contact the outer ring surface of the rotating body.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: the bearing adopts a zirconia ceramic bearing, and the inner cage of the bearing is made of polytetrafluoroethylene material, which makes the entire bearing resistant to corrosion in water and has high hardness. At the same time, the structure is simple, and the entire zirconia ceramic bearing does not require sealing treatment, which can significantly reduce the extra heat generation and power consumption caused by internal seal friction under no-load operation of the motor. When operating underwater, water can be used as a heat conduction medium, which can directly solve the heat accumulation inside the motor. At the same time, water lubrication is achieved underwater, reducing the loss caused by dry friction of ceramic bearing.

[0015] The entire internal structure of the machine is waterproofed, eliminating the need for additional sealing rings, reducing the materials required for assembly, shortening assembly time, reducing the overall weight, and increasing the motor's underwater operating power. 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 is an overall structural diagram of this utility model.

[0018] Figure 2 is an exploded schematic diagram of this utility model.

[0019] Figure 3 is a structural diagram of the pressure line cover of this utility model.

[0020] Figure 4 is a structural diagram of the wire storage trough of this utility model.

[0021] Figure 5 is a cross-sectional view of this utility model.

[0022] In the diagram: 1. Draft shield; 2. Wire clamp cover; 3. Bearing; 4. Rotating body; 5. Rotor core; 6. Blade; 7. Stator core; 8. Housing; 9. Encapsulation structure; 10. Cable; 11. Mounting hole; 12. Wire storage trough. Detailed Implementation

[0023] 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.

[0024] 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.

[0025] 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.

[0026] An embodiment of this utility model provides a water-lubricated rim underwater shaftless propulsion motor.

[0027] Example: As shown in Figures 1-5, a water-lubricated rim underwater shaftless propulsion motor includes a housing 8, which is annular. A stator core 7 is arranged on the inner annular surface of the housing 8. At the same time, potting structures 9 are arranged on both sides of the stator core 7 to enclose the stator core 7 and prevent the stator core 7 from being corroded by water and rusting. A rotating body 4 is arranged in the inner ring of the housing 8. Several blades 6 are arranged on the inner annular surface of the rotating body 4. A rotor core 5 is arranged on the outer annular surface of the rotating body 4. A permanent magnet is arranged on the rotor core 5. The permanent magnet and the rotor core 5 are arranged together.

[0028] Bearings 3 are mounted on both sides of the outer ring surface of the rotating body 4. The bearings 3 are zirconia ceramic bearings, and their internal cages are made of PTFE (polytetrafluoroethylene). PTFE is a high-performance fluoroplastic with properties such as high temperature resistance, corrosion resistance, low coefficient of friction, and insulation, thus ensuring the reliable and stable operation of the bearings 3. The outer ring of the bearing 3 contacts the inner ring of the housing 8, and the inner ring of the bearing 3 contacts the outer ring surface of the rotating body 4.

[0029] The housing 8 has a flow guide shroud 1 on both sides, which is fixedly connected to the housing 8 by bolts; the rotating body 4 is located inside the housing 8, and because of the presence of the bearing 3, there is a gap between the rotor core 5 and the stator core 7 on the outer ring surface of the rotating body 4.

[0030] The stator core 7 contains an energized coil assembly, the surface of which is coated with waterproof paint. This waterproofing effect, combined with the encapsulation structure 9, further encapsulates the stator core 7, preventing water from entering and providing underwater corrosion protection. This also extends the service life of the stator core 7. Similarly, the rotor core 5 and permanent magnets on the rotating body 4 are also coated with waterproof paint to prevent corrosion from water contact.

[0031] A protrusion is provided on the side of the housing 8, and a wire storage groove 12 is provided inside the protrusion. The enameled coil extending from the stator core 7 is stored in the wire storage groove 12. The coil assembly is fixed with glue. After the coil assembly is fixed, a wire pressing cover 2 is provided on top of the wire storage groove 12 to cover and fix it. A cable outlet hole is provided in the middle of the wire pressing cover 2. The cable 10 extending from the wire storage groove 12 is led out from the cable outlet hole. An installation hole 11 is provided on the wire pressing cover 2. Fixing holes corresponding to the installation holes 11 are also provided around the wire storage groove 12. The connection and fixation are achieved by bolts. The connection between the fixed wire storage groove 12 and the wire pressing cover 2 is sealed and waterproofed.

[0032] Working Principle: This device is used for underwater propulsion. After entering the water, a 0.5mm gap remains between the bearing 3 and the guide shroud 1, allowing water to enter the motor. Once water enters the motor, it is powered on and starts. Cable 10 supplies power to the stator core 7. When the energized coil group inside the stator core 7 is energized, it generates a magnetic field. This magnetic field acts on the rotor core 5, causing it to rotate. The rotation of the rotor core 5 drives the rotation of the rotating body 4, which in turn drives the bearing 3 to rotate. Furthermore, the magnitude of the energizing current can change the magnetic field strength of the energized coil group, thereby controlling the rotation speed of the rotating body 4. The rotating body 4 contains a blade 6 that rotates to drive water flow, thus powering the motor. The bearing 3 is a zirconia ceramic bearing with a PTFE cage, making it corrosion-resistant and highly durable in water. Its simple structure eliminates the need for sealing, significantly reducing heat generation and power consumption caused by internal seal friction during no-load operation. Underwater operation, water acts as a heat transfer medium, directly addressing internal heat buildup and providing water lubrication, reducing dry friction losses in the ceramic bearing. The entire internal structure is waterproof, eliminating the need for additional seals, reducing assembly materials, production time, and overall weight, and improving underwater motor power output.

[0033] This device reduces the overall length of the machine by setting up zirconia ceramic bearings and a flow guide shroud 1, reducing the original motor length from 104mm to about 95mm. The improved motor can still maintain the original thrust, while the shortened motor length reduces the overall power consumption of the motor by 40%, thereby reducing the overall energy consumption of the machine and saving energy.

[0034] 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.

[0035] 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 rim-driven underwater shaftless propulsion motor, characterized in that: The machine includes a housing (8), inside which are a stator core (7) and an annular rotating body (4). Inside the stator core (7) are energized coils, and on the rotating body (4) are rotor cores (5). On the inner annular surface of the rotating body (4) are blades (6). On both sides of the rotating body (4) are bearings (3), which are connected and fixed to the housing (8). On both sides of the housing (8) are flow guides (1). When the energized coils are energized, they generate a magnetic field that drives the rotor core (5) to rotate, thus rotating the rotating body (4). The blades (6) on the rotating body (4) rotate and drive the flow of water.

2. The water-lubricated rim underwater shaftless propulsion motor according to claim 1, characterized in that: The stator core (7) is provided with a potting structure (9) on both sides. The potting structure (9) covers the stator core (7) to prevent the stator core (7) from being corroded by water and rusting.

3. The water-lubricated rim underwater shaftless propulsion motor according to claim 1, characterized in that: The bearing (3) is a zirconia ceramic bearing, and the internal cage of the zirconia ceramic bearing is made of polytetrafluoroethylene material.

4. The water-lubricated rim underwater shaftless propulsion motor according to claim 1, characterized in that: A permanent magnet is provided on the rotor core (5).

5. A water-lubricated rim underwater shaftless propulsion motor according to claim 4, characterized in that: The rotor core (5) and permanent magnet on the rotating body (4) are coated with paint for waterproofing to prevent corrosion of the rotor core (5) and permanent magnet from contacting water.

6. The water-lubricated rim underwater shaftless propulsion motor according to claim 1, characterized in that: A protrusion is provided on the side of the housing (8), and a wire storage groove (12) is provided inside the protrusion. The enameled coil extending from the stator core (7) is stored in the wire storage groove (12). After the coil group is fixed, a wire pressing cover (2) is provided above the wire storage groove (12) to cover and fix it.

7. A water-lubricated rim underwater shaftless propulsion motor according to claim 6, characterized in that: A cable outlet hole is provided in the middle of the cable pressure cover (2). The cable (10) extending from the cable storage trough (12) is led out from the cable outlet hole. An installation hole (11) is provided on the cable pressure cover (2). Fixing holes corresponding to the installation hole (11) are also provided around the cable storage trough (12). The connection and fixation are achieved by bolts.

8. The water-lubricated rim underwater shaftless propulsion motor according to claim 1, characterized in that: There is a gap between the rotor core (5) and the stator core (7) on the outer ring surface of the rotating body (4).

9. A water-lubricated rim underwater shaftless propulsion motor according to claim 1, characterized in that: The outer ring of the bearing (3) is in contact with the inner ring of the housing (8), and the inner ring of the bearing (3) is in contact with the outer ring surface of the rotating body (4).

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