A double-cavity sealed underwater propeller motor

Abstract

This utility model discloses a dual-cavity sealed underwater thruster motor, including an integrally formed motor housing. The motor housing contains a mounting cavity, and an annular partition is provided on the inner wall of the motor housing, dividing the mounting cavity into an independent front chamber and a rear chamber. A rotor assembly is housed in the front chamber, and a stator assembly is housed in the rear chamber. The stator assembly is fitted around the rotor assembly, and the rear chamber is filled with a first sealant. This utility model, by dividing the mounting cavity into independent front and rear chambers, eliminates the need for additional fixtures for sealant filling of the stator assembly, saving time and avoiding sealant leakage due to fixture misalignment, thus improving processing efficiency and yield.

Description

Technical Field

[0001] This utility model relates to the field of underwater propulsion technology, specifically to a dual-cavity sealed underwater propulsion motor. Background Technology

[0002] As marine scientific research progresses, the difficulty and depth of human exploration of the ocean are increasing. Various devices for underwater aquaculture and development are becoming more prevalent; among them, with the development of intelligent technology, more and more underwater robots are appearing in our field of vision. When underwater robots and other underwater equipment operate or move underwater, their power source is an underwater propulsion system, which in turn is powered by a drive motor that rotates the propeller blades.

[0003] Because underwater operations require high levels of waterproofing for the motor, current underwater propulsion motors typically seal the rotor and stator separately with potting compound. However, in existing motor structures, the stator and rotor usually share a single cavity, with openings at both ends of the motor housing. One end is used to install an end cap, and the other serves as the protrusion for the motor shaft. Therefore, when potting the stator, a special fixture must be placed on the motor housing at the output end of the motor shaft, creating a cavity structure with only one opening. This allows for the filling of the sealant into the motor housing, and the fixture is then removed after potting. As such, the potting process for existing motor structures is cumbersome. Furthermore, misalignment during fixture installation at the motor shaft output end can easily occur, leading to sealant leakage and affecting the yield rate. Utility Model Content

[0004] To address some or all of the problems existing in the prior art, this utility model provides a dual-cavity sealed underwater thruster motor, comprising an integrally formed motor housing, an installation cavity inside the motor housing, an annular partition on the inner side wall of the motor housing, the annular partition dividing the installation cavity into an independent front chamber and a rear chamber, a rotor assembly in the front chamber, a stator assembly in the rear chamber, the stator assembly being sleeved around the rotor assembly, and a first sealant filling the rear chamber.

[0005] As a further improvement of this utility model, the rotor assembly includes a rotating shaft, which is rotatably connected to the front chamber. A rotor core is sleeved on the rotating shaft, and magnets are distributed in a circumferential array around the rotor core.

[0006] As a further improvement of this utility model, at least two bearings are provided on the inner wall of the front chamber, and the bearings are respectively sleeved around the rotating shaft.

[0007] As a further improvement of this utility model, a baffle plate is sleeved on the rotating shaft, the baffle plate abuts against one end of the rotor core, and a bushing is sleeved around the magnet, with one end of the bushing being sealed to the baffle plate.

[0008] As a further improvement of this utility model, the bushing is filled with a second sealant, which immerses the rotor core and the magnet respectively.

[0009] As a further improvement of this utility model, the stator assembly includes a wire frame, which is limited in the rear cavity and sleeved on the periphery of the rotor assembly. Multiple stator cores are distributed in a circumferential array on the wire frame, and induction coils are wound on the stator cores.

[0010] As a further improvement of this utility model, a circuit board is provided in the rear cavity, the induction coil is electrically connected to the circuit board, and a motor lead is provided on the circuit board, the motor lead extending out of the motor housing.

[0011] As a further improvement of this utility model, the first sealant is used to immerse the wire frame, stator core and circuit board respectively.

[0012] As a further improvement of this utility model, the annular partition is integrally formed with the motor housing.

[0013] As a further improvement of this utility model, the gap between the stator assembly and the rotor assembly is 0.8-1.5mm.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention utilizes an annular partition within the mounting cavity to divide it into independent front and rear chambers. The stator assembly is then installed in the rear chamber, facilitating the application of sealant to the stator assembly. This simplifies the sealant application process and improves motor production efficiency and yield. In practice, after installing the stator assembly into the rear chamber, the motor housing can be directly placed onto the sealant application equipment. Because the motor housing has an annular partition, no additional fixture is needed, saving time and preventing sealant leakage due to fixture misalignment, thus improving the yield rate. Attached Figure Description

[0016] To more clearly illustrate the solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the external structure of an embodiment of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of an embodiment of this utility model;

[0019] Figure 3 This is an exploded structural diagram of an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the internal structure of the motor housing in an embodiment of this utility model. Detailed Implementation

[0021] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used in the specification is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects, not to describe a particular order.

[0022] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment to other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this invention can be combined with other embodiments.

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0024] like Figure 1-4 As shown, a dual-cavity sealed underwater propulsion motor includes an integrally formed motor housing 1. An installation cavity 2 is provided inside the motor housing 1. An annular partition 3 is provided on the inner wall of the motor housing 1, dividing the installation cavity 2 into a front chamber 21 and a rear chamber 22. A rotor assembly is installed in the front chamber 21, and a stator assembly is fixedly installed in the rear chamber 22, with the stator assembly sleeved around the rotor assembly. A first sealant 4 is filled into the rear chamber 22; the first sealant 4 encapsulates the stator assembly within the rear chamber 22, preventing moisture from entering the stator assembly.

[0025] This dual-chamber sealed underwater thruster motor uses an annular partition 3 within the mounting chamber 2 to divide the chamber into two independent chambers: a front chamber 21 and a rear chamber 22. The stator assembly is installed in the rear chamber 22, facilitating the application of sealant to the stator assembly. This simplifies the sealant application process and improves motor production efficiency and yield. Specifically, when applying the first sealant 4, after installing the stator assembly into the rear chamber, the motor housing 1 can be directly placed onto the sealant application equipment. Because the annular partition 3 inside the motor housing 1 seals one end of the rear chamber 22, there is no need for additional fixtures. This saves time and avoids sealant leakage due to fixture misalignment, thus improving the yield rate.

[0026] In this embodiment, the annular partition 3 and the motor housing 1 are integrally formed. In other embodiments, the annular partition 3 and the motor housing 1 can also be two independent components, which can be connected and sealed by screws, sealing rings or other structures.

[0027] In this embodiment, the gap between the stator assembly and the rotor assembly is 0.8-1.5 mm, preferably 1 mm.

[0028] The stator assembly includes a wire frame 5, which is installed and positioned within the rear chamber 22. The wire frame 5 is fitted around the rotor assembly, and multiple stator cores 6 are arranged in a circular array on the wire frame 5. Induction coils (not shown in the figure) are wound around the stator cores 6. A circuit board 7 is also installed inside the rear chamber 22, and the circuit board 7 is snapped and fixed to the wire frame 5. The induction coils are electrically connected to the circuit board 7, and motor leads 8 are provided on the circuit board 7, extending out of the motor housing 1. The motor leads 8 are used to connect to an external power supply and control device. During operation, the control device sends a control signal to the circuit board 7, which then energizes the induction coils. When the induction coils are energized, the stator cores 6 become magnetic, driving the rotor assembly to rotate through electromagnetic induction, thereby achieving the purpose of driving the underwater propulsion device.

[0029] When applying sealant to the rear chamber 22, the first sealant 4 needs to be used to immerse the wire frame 5, stator core 6, and circuit board 7 respectively. After the first sealant 4 hardens, it completely seals the stator assembly and circuit board 7, preventing moisture from entering and improving the sealing performance of the stator assembly. Furthermore, by using the first sealant 4 to seal the rear chamber 22, there is no need to install an end cap at the rear end of the motor housing 1, thus saving materials and reducing the overall manufacturing cost of the motor.

[0030] The rotor assembly includes a shaft 9, which is rotatably connected to the front chamber 21. A rotor core 10 is sleeved on the shaft 9, and magnets 11, which can be permanent magnets, are arranged in a circular array around the rotor core 10. During operation, when the induction coil on the stator assembly is energized, the stator core 6 becomes magnetic, driving the magnets 11 to rotate through electromagnetic induction, which in turn drives the rotor core 10 and the rotor to rotate, thus achieving the purpose of driving the underwater propulsion device.

[0031] In this embodiment, two bearings 12 are installed on the inner wall of the front chamber 21, and the bearings 12 are respectively sleeved around the outer periphery of the rotating shaft 9. The bearings 12 connect and limit the rotating shaft 9 to the front chamber 21, thereby allowing the rotating shaft 9 to rotate freely within the front chamber 21. In other embodiments, the number of bearings 12 may be more than two, and this utility model does not limit this.

[0032] A baffle plate 13 is fitted onto the rotating shaft 9, and the baffle plate 13 abuts against one end of the rotor core 10. A bushing 14 is fitted around the magnet 11, and one end of the bushing 14 is sealed to the baffle plate 13. The rotor core 10 and the magnet 11 are surrounded by the bushing 14 and the baffle plate 13, which facilitates the filling of sealant into the rotor assembly and reduces the difficulty of processing.

[0033] Because the motor operates underwater for extended periods, the rotor assembly must also be waterproofed. In this embodiment, a second sealant 15 is filled into the bushing 14, completely submerging the rotor core 10 and the magnet 11. By encapsulating the rotor core 10 and the magnet 11 with the second sealant 15, external moisture can be prevented from entering the rotor assembly, improving its sealing performance and extending its service life.

[0034] This dual-chamber sealed underwater thruster motor encapsulates the stator assembly with a first sealant 4 and the rotor assembly with a second sealant 15, thus providing sufficient waterproof performance to meet the requirements of underwater operation. An annular partition 3 divides the mounting cavity 2 in two, facilitating the application of sealant to the stator assembly without the need for additional fixtures. This also avoids sealant leakage, simplifies the sealant application process, and improves processing efficiency and yield.

[0035] The above-described specific embodiments are preferred embodiments of this utility model, and are not intended to limit the specific scope of this utility model. The scope of this utility model includes but is not limited to the specific embodiments described above. All equivalent changes made in accordance with this utility model are within the protection scope of this utility model.

Claims

1. A dual-cavity sealed underwater thruster motor, characterized by: The device includes an integrally molded motor housing, an installation cavity inside the motor housing, an annular partition on the inner side wall of the motor housing, the annular partition dividing the installation cavity into a front chamber and a rear chamber, a rotor assembly in the front chamber, a stator assembly in the rear chamber, the stator assembly being sleeved around the rotor assembly, and a first sealant being filled in the rear chamber.

2. The dual-cavity sealed underwater thruster motor of claim 1, wherein: The rotor assembly includes a rotating shaft that is rotatably connected to the front chamber. A rotor core is sleeved on the rotating shaft, and magnets are distributed in a circumferential array around the rotor core.

3. The dual-cavity sealed underwater thruster motor of claim 2, wherein: At least two bearings are provided on the inner wall of the front chamber, and the bearings are respectively sleeved around the outer periphery of the rotating shaft.

4. The dual-cavity sealed underwater thruster motor of claim 2, wherein: A baffle plate is sleeved on the rotating shaft, and the baffle plate abuts against one end of the rotor core. A bushing is sleeved around the magnet, and one end of the bushing is sealed to the baffle plate.

5. The dual-cavity sealed underwater thruster motor of claim 4, wherein: The bushing is filled with a second sealant, which immerses the rotor core and the magnet respectively.

6. The dual-cavity sealed underwater thruster motor of any one of claims 1-5, wherein: The stator assembly includes a wire frame, which is positioned within the rear cavity and is sleeved around the rotor assembly. Multiple stator cores are arranged in a circumferential array on the wire frame, and induction coils are wound around the stator cores.

7. The dual-cavity sealed underwater thruster motor of claim 6, wherein: The rear cavity is equipped with a circuit board, the induction coil is electrically connected to the circuit board, and the circuit board is equipped with motor leads that extend out of the motor housing.

8. The dual-cavity sealed underwater thruster motor according to claim 7, characterized in that: The first sealant is used to immerse the wire frame, stator core and circuit board respectively.

9. The dual-cavity sealed underwater thruster motor of any one of claims 1-5, wherein: The annular partition is integrally formed with the motor housing.

10. The dual-cavity sealed underwater thruster motor of claim 9, wherein: The gap between the stator assembly and the rotor assembly is 0.8-1.5 mm.

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