A scalable, recycled cycloidal thruster
By designing a retractable and retractable cycloidal propeller and using a hydraulic device to control the lifting and extension of the propeller, the problems of navigation and safety of maintenance vessels in complex waters have been solved. This enables flexible adaptation to changes in water depth and direction adjustment, thereby improving maintenance efficiency and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HOHAI UNIV
- Filing Date
- 2025-07-14
- Publication Date
- 2026-06-26
AI Technical Summary
Maintenance vessels struggle to navigate effectively and ensure safety in complex waters with varying depths and abundant silt. Existing propulsion systems are ill-suited for switching between land and water and navigating complex waters, impacting maintenance efficiency and safety.
Design a retractable and recoverable cycloidal propeller. The propeller can be retracted and deployed by controlling the lifting and extension of the bearing, support, base assembly and propeller blades through a hydraulic device. The blade length and direction can be adjusted to adapt to different water depth environments.
It enables maintenance vessels to navigate flexibly in complex waters, reduces the space occupied by the hull, improves maintenance efficiency and safety, and adapts to changes in water depth and direction.
Smart Images

Figure CN120793115B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of marine technology, and more specifically, to a retractable and retractable cycloidal propulsion device. Background Technology
[0002] Since the locations of modular floating power generation panels are mostly in coal mine subsidence areas, the water level is generally around 3 meters, with fluctuations of 2.5 meters. Furthermore, the 3±2.5 meter working area is prone to siltation and swamps, resulting in complex water depth conditions in inland waters. In addition, the dense arrangement of the modular floating power generation panels poses significant challenges to the movement and operation of maintenance vessels and the safety of maintenance personnel. Therefore, the amphibious adaptability and maneuverability of maintenance vessels greatly enhance maintenance efficiency and scope, while also providing greater protection for the personal safety of maintenance personnel.
[0003] Therefore, in order to solve the problems of switching between land and water and adapting to the complex water depth environment of the photovoltaic maintenance vessel, it is necessary to design a retractable and recoverable cycloidal propulsion system to address the aforementioned issues. Summary of the Invention
[0004] To address the shortcomings of existing technologies, the present invention aims to achieve the above objectives. The technical solution adopted by the present invention is as follows:
[0005] A retractable cycloidal propeller, comprising:
[0006] The top cover of the thruster is inlaid with and fixed bearings;
[0007] The control bearing has two hydraulic devices fixed at the top and a control bracket connected to the outside.
[0008] The base assembly has the first part of the power gear assembly fixed at the top and six thruster blades connected to the bottom via a fixed shaft.
[0009] The thruster straight blade consists of a hollow first straight blade and a second straight blade nested inside it. The upper end of the interior of the first straight blade is fixed with a straight blade hydraulic system, and the lower end of the straight blade hydraulic system is connected to the lower end of the interior of the second straight blade.
[0010] The power gear assembly includes a first part of the power gear assembly with a through bearing and a second part of the power gear assembly that meshes with the gears of the first part of the power gear assembly. The second part of the power gear assembly is connected to an external power source through the top cover of the thruster. The bearing on the top cover of the thruster enables the top of the first part of the power gear assembly to move vertically without hindering the operation of the hydraulic recovery device, and it can rotate normally under the transmission of the second part of the power gear assembly.
[0011] The control bracket is connected to the top of the six thruster blades via a control shaft;
[0012] The vertical hydraulic rod of the hydraulic device drives the control bearing, control bracket, base assembly, propeller blade and the first part of the power gear assembly to lift and lower as a whole, so as to realize the retraction and deployment of the propeller;
[0013] The hydraulically driven second straight wing extends and retracts along the inner cavity of the first straight wing, reducing the overall length of the cycloidal propeller in the retracted state and compressing the space occupied by the hull when the cycloidal propeller is retracted. At the same time, the wing length of the propeller straight wing can be adjusted to adapt to different water depth environments.
[0014] Preferably, the two hydraulic devices include orthogonally arranged planar telescopic hydraulic rods. The horizontal hydraulic rods are connected to the ship's directional control system. The offset angle of the propeller blades is changed by the eccentric movement control bracket to achieve propulsion direction adjustment.
[0015] Preferably, the base assembly described above has a six-antenna symmetrically distributed structure at its bottom, with each end connected to a thruster wing via a fixed shaft.
[0016] Preferably, the bearing described above is a rotatable sliding composite bearing, which allows the first part of the power gear assembly to move vertically in a rotating state.
[0017] Preferably, the control bracket described above is a ring frame structure, which is hinged to the top of the six thruster blades via a control shaft.
[0018] The beneficial effects of this invention are:
[0019] 1. In this invention, the vertical movement of the control bearing, control bracket, base assembly, propeller blade and the first part of the power gear assembly can be realized by the hydraulic rod in the vertical direction of the hydraulic device, thereby realizing the retrieval and deployment of the cycloidal propeller.
[0020] 2. In this invention, the bearing on the top cover of the propeller can both enable the vertical movement of the top of the first part of the power gear assembly without hindering the operation of the hydraulic recovery device, and enable the power gear assembly to rotate normally under the transmission of the second part of the power gear assembly.
[0021] 3. In this invention, the propeller blade consists of two parts. The hydraulic pressure of the blade can retract the second blade into the inner cavity of the first blade, further reducing the overall length of the cycloidal propeller in the retracted state and compressing the space occupied by the hull when the cycloidal propeller is retracted. At the same time, the blade length of the propeller blade can be adjusted to adapt to different water depth environments. Attached Figure Description
[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0023] Figure 2 This is a three-dimensional structural diagram of the control bearing and control bracket of the present invention;
[0024] Figure 3 This is a three-dimensional structural diagram of the base assembly in this invention;
[0025] Figure 4 This is a three-dimensional structural diagram of the thruster top cover in this invention;
[0026] Figure 5 This is a front view of the control bearing in this invention;
[0027] Figure 6 This is a cross-sectional view of the control bearing in this invention;
[0028] Figure 7 This is a three-dimensional cross-sectional view of the straight blade of the propeller in this invention.
[0029] In the picture:
[0030] 1. Thruster top cover; 101. Bearing; 2. Control bearing; 201. Control shaft; 202. Hydraulic device; 203. Control bracket; 3. Base assembly; 301. Fixed shaft; 302. First part of power gear assembly; 4. Thruster wing; 401. First wing; 402. Second wing; 403. Wing hydraulic system; 5. Second part of power gear assembly. Detailed Implementation
[0031] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.
[0032] like Figure 1-7 As shown, a retractable cycloidal propeller includes:
[0033] The top cover of the thruster 1 is fitted with a bearing 101;
[0034] The control bearing 2 has two hydraulic devices 202 fixed on the top and a control bracket 203 connected to the outside.
[0035] The base assembly 3 has a first part 302 of the power gear assembly fixed at the top and six thruster blades 4 connected to the bottom via a fixed shaft 301.
[0036] The thruster straight wing 4 is composed of a hollow first straight wing 401 and a second straight wing 402 nested inside it. The upper end of the interior of the first straight wing 401 is fixed with a straight wing hydraulic 403, and the lower end of the straight wing hydraulic 403 is connected to the lower end of the interior of the second straight wing 402.
[0037] The power gear assembly includes a first part 302 of the power gear assembly with a through bearing 101, and a second part 5 of the power gear assembly that meshes with the gears of the first part 302 of the power gear assembly. The second part 5 of the power gear assembly passes through the top cover 1 of the thruster and is connected to an external power source. Through the bearing 101 on the top cover 1 of the thruster, the top of the first part 302 of the power gear assembly can move vertically without hindering the operation of the hydraulic recovery device, and can rotate normally under the transmission of the second part 5 of the power gear assembly.
[0038] The control bracket 203 is connected to the top of the six thruster blades 4 via the control shaft 201;
[0039] The vertical hydraulic rod of the hydraulic device 202 drives the control bearing 2, control bracket 203, base assembly 3, propeller wing 4 and the first part of the power gear assembly 302 to lift and lower as a whole, so as to realize the retraction and deployment of the propeller;
[0040] The hydraulic 403 drives the second straight wing 402 to extend and retract along the inner cavity of the first straight wing 401, reducing the overall length of the cycloidal propeller in the retracted state, compressing the space occupied by the hull when the cycloidal propeller is retracted, and adjusting the wing length of the propeller straight wing to adapt to different water depth environments.
[0041] Preferably, the two hydraulic devices 202 include orthogonally arranged planar telescopic hydraulic rods. The horizontal hydraulic rods are connected to the ship's directional control system. The offset angle of the propeller blade 4 is changed by the eccentric movement control bracket 203 to achieve propulsion direction adjustment.
[0042] Preferably, the base assembly 3 described above has a six-antenna symmetrical distribution structure at its bottom, and each end is connected to a thruster wing 4 via a fixed shaft 301.
[0043] Preferably, the bearing 101 described above is a rotatable sliding composite bearing, which allows the first part 302 of the power gear assembly to move in the vertical direction while rotating.
[0044] Preferably, the control bracket 203 is a ring frame structure, which is hinged to the top of the six thruster blades 4 via the control shaft 201.
[0045] Working Principle: This invention has four operating states: rotation, retraction, deployment, and steering. When the retractable cycloidal propeller is in operation, the propeller top cover 1 is fixed to the hull. The ship's power system is connected to the second part 5 of the power gear assembly. The second part 5 of the power gear assembly drives the first part 302 of the power gear assembly, thereby driving the rotation of the base assembly 3, the control bracket 203, and the propeller blade 4. At the same time, the control bracket 203 rotates along the outside of the control bearing 2, and the first part 302 of the power gear assembly rotates with the bearing 101, ensuring that the propeller top cover 1, bearing 1, and the control bracket 203 rotate within the retractable cycloidal propeller. 101. The upper half of the power gear assembly, consisting of the second part 5, the control bearing 2, and the hydraulic control device 202, is fixed, while the lower half, consisting of the control shaft 201, the control bracket 203, the base assembly 3, the fixed shaft 301, the first part of the power gear assembly 302, and the thruster straight wing 4, rotates freely. When the retractable cycloidal thruster is in the retracted state, the electronic signal on the ship controls the retraction of the vertical hydraulic rod of the hydraulic device 202. The first part of the power gear assembly 302 moves upward through the bearing 101. Except for the thruster top cover 1, the bearing 101, and the second part of the power gear assembly 5, the retractable cycloidal thruster... The other lower parts also retract upwards, reducing the distance between the base assembly 3 and control bearing 2 and the propeller top cover 1. Simultaneously, the ship's electronic signals control the contraction of the straight wing hydraulic 403 inside the propeller straight wing 4, causing the second straight wing 402 to retract into the inner cavity of the first straight wing 401, reducing the wing length of the propeller straight wing 4. When the retractable cycloidal propeller is in the deployed state, the operating process is the opposite of when it is in the retracted state. Therefore, the retractable cycloidal propeller can control the wing length of the propeller straight wing 4 and the distance between the base assembly 3 and control bearing 2 and the propeller top cover 1 by freely adjusting these two states. The distance between them determines the total height of the retractable cycloidal thruster, allowing it to adapt to complex water depth environments. When the retractable cycloidal thruster is in a steering state, the ship's steering control system is equipped with a lateral hydraulic system. This system connects to a horizontal hydraulic rod in the hydraulic device 202. The two hydraulic devices 202, with their orthogonal telescopic directions, can cause the control bearing 2, control bracket 203, and control shaft 201 to move eccentrically in the x and y planes through the telescopic extension and retraction of the lateral hydraulic system connected to the ship's steering control system. This causes the six thruster blades 4 to deviate, generating pressure differences of different directions and magnitudes, thus changing the propulsion direction of the retractable cycloidal thruster.
[0046] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0047] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.
Claims
1. A retractable and retractable cycloidal propeller, characterized in that, include: The top cover of the thruster (1) is fitted with a bearing (101). The control bearing (2) has two hydraulic devices (202) fixed on the top and a control bracket (203) connected to the outside. The base assembly (3) has a first part (302) of the power gear assembly fixed on the top and six thruster blades (4) connected to the bottom via a fixed shaft (301). The thruster straight wing (4) consists of a hollow first straight wing (401) and a second straight wing (402) nested inside it. The upper end of the first straight wing (401) is fixed with a straight wing hydraulic jack (403), and the lower end of the straight wing hydraulic jack (403) is connected to the lower end of the second straight wing (402). The power gear assembly includes a first part (302) of the power gear assembly with a through bearing (101) and a second part (5) of the power gear assembly that meshes with the gear of the first part (302). The second part (5) of the power gear assembly passes through the top cover (1) of the thruster and is connected to an external power source. Through the bearing (101) on the top cover (1), the first part (302) of the power gear assembly can move vertically at the top without hindering the operation of the hydraulic recovery device, and can rotate normally under the transmission of the second part (5). The control bracket (203) is connected to the top of the six thruster blades (4) via a control shaft (201); The vertical hydraulic rod of the hydraulic device (202) drives the control bearing (2), control bracket (203), base assembly (3), thruster straight wing (4) and the first part of the power gear assembly (302) to lift and lower as a whole, so as to realize the retraction and deployment of the thruster; The hydraulic wing (403) drives the second straight wing (402) to extend and retract along the inner cavity of the first straight wing (401), reducing the overall length of the cycloidal propeller in the retracted state, compressing the space occupied by the hull when the cycloidal propeller is retracted, and adjusting the wing length of the propeller straight wing to adapt to different water depth environments.
2. The retractable cycloidal propeller according to claim 1, characterized in that: The two hydraulic devices (202) include orthogonally arranged planar telescopic hydraulic rods. The horizontal hydraulic rods are connected to the ship's direction control system. The offset angle of the propeller blade (4) is changed by the eccentric movement control bracket (203) to achieve propulsion direction adjustment.
3. The retractable and retractable cycloidal propeller according to claim 1, characterized in that: The base assembly (3) has a six-antenna symmetrical distribution structure at the bottom, and each end is connected to a thruster wing (4) through a fixed shaft (301).
4. A retractable and retractable cycloidal propeller according to claim 1, characterized in that: The bearing (101) is a rotatable sliding composite bearing, which allows the first part (302) of the power gear assembly to move vertically in a rotating state.
5. A retractable and retractable cycloidal propeller according to claim 1, characterized in that: The control bracket (203) is a ring frame structure, which is hinged to the top of the six thruster blades (4) via the control shaft (201).