Underwater propeller

Abstract

The utility model belongs to the technical field of propellers, and particularly relates to an underwater propeller which comprises a motor shell, a spiral propelling assembly arranged in a rotating mode relative to the motor shell and a brushless direct current motor installed in the motor shell, and a planetary reducer is installed at the tail end of the brushless direct current motor. The planetary reducer is provided with a planet carrier in a matched mode, a magnetic coupling sealing assembly is arranged at the tail end of the planet carrier, the brushless direct current motor drives the planetary reducer and the planet carrier to be matched with the magnetic coupling sealing assembly to drive the spiral propelling assembly to rotate, and the spiral propelling assembly generates thrust by stirring water flow. The device is compact in design, good in sealing performance, high in transmission efficiency and capable of effectively solving the problems of water leakage and water seepage and prolonging the service life.

Description

Technical Field

[0001] This utility model belongs to the field of propulsion technology, specifically relating to an underwater propulsion device. Background Technology

[0002] In fields such as ships, underwater drones, and marine engineering equipment, underwater propellers are core power components, and their sealing performance directly affects the reliability and service life of the equipment. In existing technologies, the propeller's sealing structure is typically located at the connection between the power output shaft and the propeller to prevent external water intrusion and internal lubricant leakage. However, traditional sealing solutions in existing technologies have significant drawbacks: insufficient sealing performance, complex structures, and difficulty in meeting the requirements of complex underwater environments. Utility Model Content

[0003] In view of the above-mentioned shortcomings in the existing technology, the present invention provides an underwater thruster to solve the above-mentioned problems.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] An underwater propulsion device includes a motor housing, a helical propulsion assembly rotatably disposed relative to the motor housing, and a brushless DC motor installed inside the motor housing. A planetary reducer is installed at the end of the brushless DC motor, and a planetary carrier is installed in cooperation with the planetary reducer. A magnetic coupling sealing assembly is provided at the end of the planetary carrier. The brushless DC motor drives the planetary reducer and the planetary carrier in cooperation with the magnetic coupling sealing assembly to drive the helical propulsion assembly to rotate. The helical propulsion assembly generates thrust by agitating the water flow.

[0006] Furthermore, the propeller assembly includes a propeller body and a plurality of propeller blades fixedly connected to the propeller body. A cavity is opened in the propeller body. A deep groove ball bearing is provided at the end of the propeller body away from the motor housing, and a water-lubricated bearing is provided at the end of the propeller body closer to the motor housing. The propeller body is rotatably connected to the deep groove ball bearing with the deep groove ball bearing as the fulcrum of rotation.

[0007] Furthermore, the magnetic coupling sealing assembly includes an inner ring support fixedly connected to the end of the planetary carrier, an inner magnet bonded to the inner ring support, an outer magnet fixing member bonded to the inner wall of the cavity, and an outer magnet fixedly bonded to the outer magnet fixing member.

[0008] Furthermore, the motor housing is fixedly connected to a plurality of guide shield fixing rods at the front end and a watertight connector is installed at the rear end. The plurality of guide shield fixing rods are used to fix a guide shield together.

[0009] Furthermore, the brushless DC motor includes a brushless DC motor driver and a stator and a rotor electrically connected to the brushless DC motor driver, with the end of the rotor fixedly connected to the planetary carrier.

[0010] Furthermore, the brushless DC motor driver is electrically connected to the watertight connector.

[0011] Compared with the prior art, this utility model has the following advantages:

[0012] This utility model has a simple structure and compact design. It has good sealing performance and high transmission efficiency, which can effectively solve the problem of water leakage and seepage and extend its service life. Attached Figure Description

[0013] Figure 1 This is a cross-sectional view of an embodiment of an underwater thruster according to the present invention;

[0014] Figure 2 This is a three-dimensional structural diagram of an embodiment of an underwater thruster according to the present invention;

[0015] Figure 3 This is a three-dimensional structural diagram of an embodiment of an underwater thruster according to the present invention (without the fairing);

[0016] The reference numerals in the accompanying drawings include:

[0017] 1. Motor housing; 2. Planetary reducer; 3. Planetary carrier; 4. Propeller body; 5. Propeller blade; 6. Deep groove ball bearing; 7. Water-lubricated bearing; 8. Inner ring support; 9. Inner magnet; 10. Outer magnet fixing piece; 11. Outer magnet; 12. Draft shield fixing rod; 13. Watertight connector; 14. Draft shield; 15. Brushless DC motor driver; 16. Stator; 17. Rotor. Detailed Implementation

[0018] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0020] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0021] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; 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 refer to the internal communication of two components or the interaction between 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.

[0022] Example:

[0023] like Figures 1-3As shown, this utility model discloses an underwater propulsion device, comprising a motor housing 1, a helical propulsion assembly rotatably disposed relative to the motor housing 1, and a brushless DC motor installed inside the motor housing 1. A planetary reducer 2 is installed at the end of the brushless DC motor, and a planetary carrier 3 is mounted on the planetary reducer 2. A magnetic coupling sealing assembly is provided at the end of the planetary carrier 3. The brushless DC motor drives the planetary reducer 2 and the planetary carrier 3 in conjunction with the magnetic coupling sealing assembly to rotate the helical propulsion assembly. The helical propulsion assembly generates thrust by agitating the water flow. The helical assembly includes a propeller body 4 and multiple propeller blades 5 fixedly connected to the propeller body 4. A cavity is formed inside the propeller body 4. A deep groove ball bearing 6 is provided at the end of the propeller body 4 away from the motor housing 1, and a... One end is provided with a water-lubricated bearing 7. The propeller body 4 is rotatably connected to the deep groove ball bearing 6 with the deep groove ball bearing 6 as the rotation fulcrum. The magnetic coupling sealing assembly includes an inner ring support 8 fixedly connected to the end of the planetary carrier 3, an inner magnet 9 bonded to the inner ring support 8, an outer magnet fixing part 10 bonded to the inner wall of the cavity, and an outer magnet 11 fixedly bonded to the outer magnet fixing part 10. The motor housing 1 is fixedly connected to a plurality of flow guide fixing rods 12 at the front end and a watertight plug 13 is installed at the end. The plurality of flow guide fixing rods 12 are jointly fixedly set to a flow guide 14. The brushless DC motor includes a brushless DC motor driver 15 and a stator 16 and a rotor 17 electrically connected to the brushless DC motor driver 15. The end of the rotor 17 is fixedly connected to the planetary carrier 3. Specifically, the working principle and effect of this underwater thruster are as follows: The rotor 17 is connected to the planetary reducer 2 with a reduction ratio of 3:1. The planetary carrier 3 is connected to the inner ring support 8. Thus, the rotation of the rotor 17 will drive the inner ring support 8 to rotate. An inner magnet 9 is fixed to the inner ring support 8 with glue. The propeller body 4 has a cavity inside to place an outer magnet 11, which is fixed with glue. After the inner ring support 8 and the inner magnet 9 rotate together, the outer magnet 11 will rotate due to the change in magnetic poles, thereby driving the propeller body 4 to rotate. The propeller blades 5 cut the liquid and generate thrust.

[0024] The above are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.

Claims

1. An underwater propulsor characterized by: The application relates to a motor housing, a spiral propelling assembly arranged to rotate relative to the motor housing and a brushless direct current motor installed in the motor housing, wherein the brushless direct current motor is provided with a planetary reducer at the end, the planetary reducer is provided with a planet carrier in cooperation, the planet carrier is provided with a magnetic coupling sealing assembly at the end, the brushless direct current motor drives the planetary reducer, the planet carrier and the magnetic coupling sealing assembly to rotate the spiral propelling assembly, and the spiral propelling assembly generates thrust by stirring water flow.

2. An underwater propulsor as claimed in claim 1, characterized in that: The spiral propelling assembly comprises a propeller body and a plurality of propeller blades fixedly connected to the propeller body, a cavity is formed in the propeller body, a deep groove ball bearing is arranged at the end of the propeller body away from the motor housing, a water lubricating bearing is arranged at the end of the propeller body close to the motor housing, and the propeller body is rotatably connected to the deep groove ball bearing with the deep groove ball bearing as the rotating support point.

3. An underwater propulsor as claimed in claim 2, characterised in that: The magnetic coupling sealing assembly comprises an inner ring support fixedly connected to the end of the planet carrier, an inner magnet arranged in adhesion to the inner ring support, an outer magnet fixing member arranged in adhesion to the inner wall of the cavity and an outer magnet fixedly and adhesively connected to the outer magnet fixing member.

4. An underwater propulsor as claimed in claim 3, characterised in that: The motor housing is provided with a plurality of fairing fixing rods fixedly connected to the front end and a watertight plug-in connector fixedly installed at the end, and the fairing fixing rods are jointly arranged to fix a fairing.

5. An underwater propulsor as claimed in claim 4, characterised in that: The brushless direct current motor comprises a brushless direct current motor driver, a stator and a rotor electrically connected to the brushless direct current motor driver, and the rotor is fixedly connected to the planet carrier at the end.

6. An underwater propulsor as claimed in claim 5, characterised in that: The brushless direct current motor driver is electrically connected to the watertight plug-in connector.

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