A drive structure for a marine electric propulsion system

Abstract

The utility model discloses a kind of driving structures of marine electric propulsion system, including girder frame, forebody beam, rear body beam, front stretch arc frame and rear stretch arc frame, located the forebody beam of both ends of the front side of the girder frame is set and is connected by welding, the forebody beam inner wall is connected with forebody reinforcing inclined plate by bolt, the forebody reinforcing inclined plate bottom is connected with girder frame by bolt, located the rear body beam of both ends of the rear side of the girder frame is set and is connected by welding, the rear body beam inner wall is connected with rear body reinforcing inclined plate by bolt, the rear body reinforcing inclined plate top end is connected with girder frame by bolt, the forebody beam front end is welded with front stretch arc frame, it is related to ship structure technical field, three-dimensional support lifting structure rigidity and installation convenience, torsional strength is enhanced, can resist ship body deformation, arc design reduces water resistance, modular interface is convenient to maintain, outer wrapping driving paddle is equipped with anti-winding cutter, reduce winding risk, reinforcing head flow guide reduces resistance.

Description

Technical Field

[0001] This utility model relates to the field of ship structure technology, specifically to a drive structure for a ship electric propulsion system. Background Technology

[0002] Ships are vehicles capable of navigating waterways, consisting of a hull, power system, navigation equipment, etc. They can be categorized into commercial, military, and special-purpose vessels based on their purpose. Their development has progressed through the eras of wooden oar sailboats and steam-powered ships, and now primarily uses diesel engines and LNG propulsion, supplemented by propellers. Modern ships utilize composite materials for weight reduction, are equipped with GPS navigation and automated control systems, and emphasize environmental protection technologies. Electric propulsion systems are power devices that use electricity to propel ships. Unlike traditional mechanical propulsion, such as diesel engines directly driving propellers, electricity can come from fuel oil, natural gas, fuel cells, or even renewable energy sources such as solar and wind power. Electric propulsion systems are becoming a core technology for the low-carbon and intelligent transformation of modern ships, with a rapidly increasing penetration rate, especially in short- and medium-haul routes and high-end vessels.

[0003] Traditional small marine electric propulsion systems typically employ a single-layer welded frame structure, which has limited torsional strength and is prone to deformation in complex sea conditions, leading to loosening or even failure of the drive components. Traditional linear frame designs result in high water flow resistance and insufficient maneuverability. Drive components are mostly welded and fixed, requiring complete disassembly for damage to a single component, which is time-consuming and difficult to adapt to the rapid maintenance needs of ships. Open-type propellers are easily entangled by fishing nets, seaweed, and other debris, causing motor overload and shutdown, requiring frequent manual cleaning and affecting navigation efficiency. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a drive structure for a ship electric propulsion system. The combined three-dimensional support enhances structural rigidity and ease of installation, strengthens torsional resistance to resist hull deformation, reduces water resistance with an arc-shaped design, facilitates maintenance with modular interfaces, and features an externally encased drive propeller with anti-entanglement cutters to reduce the risk of entanglement. The reinforced head also reduces drag by guiding the flow.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a drive structure for a ship's electric propulsion system, comprising a main beam, a front beam, a rear beam, a forward extension arc frame, and a rear extension arc frame. Front beams are located at both ends of the front side of the main beam and are connected by welding. The inner walls of each front beam are bolted with a front reinforcement inclined plate. The bottom of each front reinforcement inclined plate is bolted to the main beam. Rear beams are located at both ends of the rear side of the main beam and are connected by welding. The inner walls of each rear beam are bolted with a rear reinforcement inclined plate. The top of each rear reinforcement inclined plate is bolted to the main beam. A forward extension arc frame is welded to the front end of the front beam, and a rear extension arc frame is welded to the rear end of the rear beam. Steering component mounting plates are welded to both ends of the rear extension arc frame.

[0008] Preferably, the front bottom end of the extended arc frame is provided with a mounting support rod 1 and connected by bolts, and the rear bottom end of the extended arc frame is connected by two mounting support rods 2, which are symmetrically distributed.

[0009] Preferably, the front bottom of each of the rear extension arc frames is bolted with two mounting support rods three in a symmetrical arrangement, and the rear bottom of each of the rear extension arc frames is bolted with two mounting support rods four in a symmetrical arrangement.

[0010] Preferably, the bottom end of the mounting support rod is bolted to a front drive motor, and a water-contacting arc-shaped reinforcement head is provided at the front end of the outer wall of the front drive motor.

[0011] Preferably, an outer frame type multi-blade drive propeller is provided on the rear side of the front drive motor and connected by a coupling. The top of the outer frame type multi-blade drive propeller is connected to a support rod 2 by bolts. Anti-winding cutters are provided at both ends of the rear side of the outer frame type multi-blade drive propeller.

[0012] Preferably, the bottom ends of the three mounting support rods are all bolted to a rear drive motor, and a water-contacting arc-shaped reinforcing head is provided at the front end of the outer wall of the rear drive motor.

[0013] Preferably, the rear drive motor is provided with an outer frame type multi-blade drive propeller 2 and is connected by a coupling. The top of the outer frame type multi-blade drive propeller 2 is connected to the support rod 4 by bolts. The two ends of the rear side of the outer frame type multi-blade drive propeller 2 are provided with anti-winding cutter 2.

[0014] (III) Beneficial Effects

[0015] This utility model provides a drive structure for a ship's electric propulsion system. It has the following beneficial effects:

[0016] (1) The drive structure of this ship electric propulsion system significantly improves the structural rigidity and installation convenience of the ship propulsion system through three-dimensional support. The main beam frame is welded to the front beam and the rear beam. Combined with the bolted triangular support of the front and rear reinforcement plates, the overall torsional strength is improved compared with the traditional single-layer frame structure, which can resist the deformation of the ship under typhoon. The arc transition design of the forward arc frame and the rear arc frame reduces water flow resistance and provides a modular installation interface for the drive components. The forward arc frame realizes the three-point positioning installation of the front drive motor and the outer frame multi-blade drive propeller through the installation support rod one and the installation support rod two. The rear arc frame fixes the rear drive system through the symmetrically distributed installation support rod three and the installation support rod four. The disassembly and assembly time of a single component is shortened compared with the traditional welded structure, which facilitates quick maintenance.

[0017] (2) The drive structure of this ship electric propulsion system, with the frame design of the outer frame multi-blade drive propeller one and the outer frame multi-blade drive propeller one and two, combined with the rear anti-entanglement blade, can effectively cut fishing nets, aquatic plants and other entangled objects, reducing the risk of entanglement compared with traditional open propellers. The water-contact arc-shaped reinforcement head one and the water-contact arc-shaped reinforcement head two adopt the flow-guiding curved surface, which protects the front bearing of the drive motor and reduces water flow disturbance. The steering component mounting plates at both ends of the rear extension arc frame support the integration of the full-rotation propeller, combined with the independent speed control of the front and rear drive propellers. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the present invention;

[0019] Figure 2 This is a structural diagram of the front drive motor area of ​​this utility model;

[0020] Figure 3 This is a structural diagram of the rear drive motor area of ​​this utility model;

[0021] Figure 4 This is a front view of the overall structure of this utility model.

[0022] In the diagram: 1. Main beam frame; 2. Front beam; 3. Front reinforcement inclined plate; 4. Rear beam; 5. Rear reinforcement inclined plate; 6. Forward extension arc frame; 7. Rear extension arc frame; 8. Steering component mounting plate; 9. Mounting support rod one; 10. Mounting support rod two; 11. Mounting support rod three; 12. Mounting support rod four; 13. Front drive motor; 14. Water-contacting arc-shaped reinforcement head one; 15. Outer frame type multi-blade drive propeller one; 16. Anti-winding cutter one; 17. Rear drive motor; 18. Water-contacting arc-shaped reinforcement head two; 19. Outer frame type multi-blade drive propeller two; 20. Anti-winding cutter two. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-4 This utility model provides a technical solution: a drive structure for a ship electric propulsion system, including a main beam frame 1, a front beam 2, a rear beam 4, a forward extension arc frame 6, and a rear extension arc frame 7. Front beams 2 are located at both ends of the front side of the main beam frame 1 and are connected by welding. The drive structure uses the main beam frame 1 as the core load-bearing skeleton. The front ends of the main beam frame 1 are fixedly connected to the front beams 2 by welding, and the rear ends of the main beam frame 4 are welded to the rear ends, forming a symmetrical rigid frame. The inner walls of the front beams 2 are all bolted with front reinforcement inclined plates 3. The bottom of the front reinforcement inclined plates 3 are all bolted to the main beam frame 1. Rear beams 4 are located at both ends of the rear side of the main beam frame 1 and are connected by welding. The inner walls of the rear beams 4 are all bolted with rear reinforcement inclined plates 5. The top of the rear reinforcement inclined plates 5 are all bolted to the main beam frame 1. The front body reinforcement inclined plate 3 and the rear body reinforcement inclined plate 5 are respectively bolted to the inner wall of the rear body beam 4. The two ends of the inclined plate are respectively bolted to the main beam frame 1 and the corresponding body beam, forming a triangular mechanical support structure. The combination of welding and bolt connection ensures the overall strength of the frame and facilitates later disassembly and maintenance. The front body beam 2 is welded with a forward arc frame 6, and the rear body beam 4 is welded with a rear arc frame 7. Both ends of the rear arc frame 7 are welded with steering component mounting plates 8. The forward arc frame 6 welded to the front end of the front body beam 2 and the rear arc frame 7 welded to the rear end of the rear body beam 4 adopt an arc transition design, which not only reduces the water flow resistance when the ship is sailing, but also provides a modular installation interface for the drive component. The steering component mounting plates 8 welded to both ends of the rear arc frame 7 can be adapted to steering mechanisms such as azimuth thrusters or rudders, providing a hardware foundation for ship steering control.

[0025] The front bottom of the extended arc frame 6 is provided with a mounting support rod 9 and is connected by bolts. The rear bottom of the extended arc frame 6 is also connected by two mounting support rods 10, which are symmetrically distributed. The support rods are made of high-strength aluminum alloy and the surface is treated with anti-corrosion. The bolt connection method ensures that the support rods and the arc frame can transmit tensile and compressive combined loads. The three support rods form a triangular stable structure, providing multi-point support for the front drive system. The single support rod on the front side bears the vertical load of the drive motor, and the symmetrical double support rods on the rear side balance the torque generated when the drive paddle rotates, avoiding deformation of the arc frame due to unilateral force.

[0026] The front bottom of the rear extension arc frame 7 is bolted with two mounting support rods 11, which are symmetrically distributed. The rear bottom of the rear extension arc frame 7 is bolted with two mounting support rods 12, which are symmetrically distributed. The four sets of support rods form a planar rigid support with the rear extension arc frame 7. The spacing between the support rods is optimized according to the center of gravity of the rear drive system to ensure that the driving force is evenly transmitted to the arc frame structure. The symmetrically distributed support rods evenly distribute the weight of the rear drive motor 17 and the drive paddle to the arc frame, avoiding structural fatigue caused by local stress concentration.

[0027] The bottom end of the mounting support rod 9 is connected to the front drive motor 13 by bolts. A water-contacting arc-shaped reinforcement head 14 is provided at the front end of the outer wall of the front drive motor 13. The motor is arranged coaxially so that the driving force direction is consistent with the ship's sailing direction, thereby improving propulsion efficiency. The reinforcement head adopts a flow-guiding curved surface design and is made of wear-resistant stainless steel. The angle between the curved surface and the water flow direction has been optimized by simulation, which can guide the water flow smoothly along the curved surface.

[0028] The front drive motor 13 is equipped with an outer frame-type multi-bladed drive propeller 15 connected by a coupling. The top of the outer frame-type multi-bladed drive propeller 15 is bolted to support rods 2 10. Both ends of the rear side of the outer frame-type multi-bladed drive propeller 15 are equipped with anti-entanglement cutters 16. The outer frame of the drive propeller adopts a hollow streamlined design, with multiple curved blades installed inside. The top of the outer frame is fixed to two support rods 2 10 by bolts to form a three-point support. The coupling transmits the motor torque to the drive propeller. The multi-bladed design increases the water-pushing area and improves the thrust compared to a traditional single propeller. The bolted connection between the outer frame and the support rods enhances the stability of the propeller and reduces vibration during high-speed rotation. The anti-entanglement cutters 16 can cut up fishing nets, aquatic plants and other debris that are entangled in the outer frame.

[0029] The bottom ends of the mounting support rods 11 are all bolted to the rear drive motors 17. A water-contacting arc-shaped reinforcement head 18 is provided at the front end of the outer wall of the rear drive motor 17. The structure of the water-contacting arc-shaped reinforcement head 18 is the same as that of the front reinforcement head, ensuring that both the front and rear reinforcement heads can achieve the optimal flow guiding effect. The rear drive motor 17 and the front motor work together to realize the bidirectional power output of the ship's forward and backward movement, improving the ship's maneuverability in narrow waters.

[0030] The rear drive motor 17 is equipped with an outer frame type multi-blade drive propeller 2 19 connected by a coupling. The top of the outer frame type multi-blade drive propeller 2 19 is bolted to support rod 4 12. Anti-winding cutter 20 is provided at both ends of the rear side of the outer frame type multi-blade drive propeller 2 19. The top of the outer frame of the drive propeller 2 is fixed to the two support rod 4 12 with bolts to form a stable support. The anti-winding cutter 20 at both ends of the rear side of the outer frame has the same structure as the front cutter 1, which can cover the entire area behind the drive propeller to ensure the cutting of debris.

[0031] Working principle: The front drive motor 13 is fixed to the bottom front end of the forward extension frame 6 via mounting support rod 19. After the motor is powered on, it drives the outer frame-type multi-bladed drive propeller 15 to rotate at high speed through the coupling, generating forward thrust. The top of the drive propeller 15 is connected to the mounting support rod 20 via bolts, forming a stable support structure to ensure mechanical balance during rotation. The rear drive motor 17 is fixed to the bottom front end of the rear extension frame 7 via mounting support rod 31. Similarly, it drives the outer frame-type multi-bladed drive propeller 29 to rotate through the coupling, generating backward thrust. The end is connected to the mounting support rod 4 with bolt 12 to ensure structural stability. Anti-entanglement cutters are set at both ends of the rear side of drive propeller 1 and drive propeller 2. When the ship encounters weeds, ropes and other debris during operation, the cutters rotate with the drive propeller to cut the debris, preventing it from entangled in the drive propeller shaft and ensuring the continuous and stable operation of the system. The water-contact arc-shaped reinforcement head 14 at the front end of the front drive motor 13 and the water-contact arc-shaped reinforcement head 28 at the front end of the rear drive motor 17 can reduce the direct impact of water flow on the motor, reduce water resistance, and at the same time enhance the structural strength of the front end of the motor and extend the service life of the equipment.

[0032] The main beam 1 serves as the core load-bearing structure, connecting the front beam 2 and the rear beam 4 by welding to form a rigid frame. The front reinforcement inclined plate 3 and the rear reinforcement inclined plate 5 are connected to the main beam 1, the front beam 2, and the rear beam 4 by bolts, forming a triangular reinforcement structure to improve the overall torsional and bending resistance and ensure the stability of the drive structure in complex water flow environments. The steering component mounting plates 8 welded to both ends of the rear extension arc frame 7 are used to fix the steering mechanism, such as the rudder or the propeller steering device, and the ship's steering is achieved by controlling the steering component.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model 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 basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] 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 drive structure for a ship's electric propulsion system, characterized in that: The structure includes a main beam frame (1), a front beam (2), a rear beam (4), a front extension arc frame (6), and a rear extension arc frame (7). Front beams (2) are provided at both ends of the front side of the main beam frame (1) and are connected by welding. The inner walls of the front beams (2) are connected by bolts to front reinforcement inclined plates (3). The bottom of the front reinforcement inclined plates (3) is connected to the main beam frame (1) by bolts. Rear beams (4) are provided at both ends of the rear side of the main beam frame (1) and are connected by welding. The inner walls of the rear beams (4) are connected by bolts to rear reinforcement inclined plates (5). The top of the rear reinforcement inclined plates (5) is connected to the main beam frame (1) by bolts. The front extension arc frame (6) is welded to the front end of the front beam (2). The rear extension arc frame (7) is welded to the rear end of the rear beam (4). Steering component mounting plates (8) are welded to both ends of the rear extension arc frame (7).

2. The drive structure of a ship electric propulsion system according to claim 1, characterized in that: The front bottom of the extended arc frame (6) is provided with a mounting support rod 1 (9) and is connected by bolts. The rear bottom of the extended arc frame (6) is connected by two mounting support rods 2 (10) and is symmetrically distributed.

3. The drive structure of a ship electric propulsion system according to claim 1, characterized in that: The front bottom of the rear extension arc frame (7) is connected by two mounting support rods three (11) and they are symmetrically distributed. The rear bottom of the rear extension arc frame (7) is connected by two mounting support rods four (12) and they are symmetrically distributed.

4. The drive structure of a ship electric propulsion system according to claim 2, characterized in that: The bottom end of the mounting support rod (9) is connected to the front drive motor (13) by bolts, and a water-contacting arc-shaped reinforcement head (14) is provided at the front end of the outer wall of the front drive motor (13).

5. The drive structure of a ship electric propulsion system according to claim 4, characterized in that: The front drive motor (13) is provided with an outer frame type multi-blade drive propeller (15) on the rear side and is connected to it by a coupling. The top of the outer frame type multi-blade drive propeller (15) is connected to the support rod (10) by bolts. The two ends of the rear side of the outer frame type multi-blade drive propeller (15) are provided with anti-winding cutter (16).

6. The drive structure of a ship electric propulsion system according to claim 3, characterized in that: The bottom of each of the three mounting support rods (11) is connected to a rear drive motor (17) by bolts, and a water-contacting arc-shaped reinforcing head (18) is provided at the front end of the outer wall of the rear drive motor (17).

7. The drive structure of a ship electric propulsion system according to claim 6, characterized in that: The rear drive motor (17) is provided with an outer frame type multi-blade drive propeller 2 (19) and is connected to it by a coupling. The top of the outer frame type multi-blade drive propeller 2 (19) is connected to the support rod 4 (12) by bolts. The two ends of the rear side of the outer frame type multi-blade drive propeller 2 (19) are provided with anti-winding cutter 2 (20).

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