Shaftless electric propeller for ship

Abstract

The shaftless electric propeller is characterized in that a groove is formed in the inner side wall of a shell, a sound absorption plate is embedded in the groove, the inner side wall of the sound absorption plate is fixedly connected through a connecting plate, the inner wall of the shell is fixedly connected with a silencing mechanism, the silencing mechanism comprises a sleeve, and one end of the sleeve is fixedly connected to the inner wall of the shell; through the arrangement of the silencing mechanism, when the propeller works, the propeller blades are driven by the driving motor to rotate, and when the driving motor works, the silencing mechanism is used for replacing a traditional connecting support to connect the driving motor with the shell; a spring and a buffer pad in the silencing mechanism can absorb and buffer mechanical vibration between the driving motor and the shell, vibration transmitted to the shell and seawater is reduced, the spring provides elastic buffering, impact and mechanical stress generated during operation of the motor are relieved, and the service life of equipment and the structure is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of propulsion technology, specifically a shaftless electric propulsion for ships. Background Technology

[0002] A "propeller" is a device used by ships, submersibles, and land vehicles to generate thrust and achieve motion. It is the core component of the propulsion equipment and directly affects the performance, safety, and efficiency of the transportation vehicle.

[0003] In the prior art, a Chinese utility model patent discloses a shaftless electric propeller (publication number: CN220010061U), specifically disclosing that the housing has an inner annular groove, a stator is axially fixed in the inner annular groove, a shaftless rotor is mounted on the inner ring of the stator, and bearing contact ring surfaces are concentrically located at both ends of the shaftless rotor with the stator. Bearing ring seats are mounted at both ends of the housing, and several rolling bearings are evenly distributed on the inner outer surface of the bearing ring seats. The rolling bearings are connected to the bearing ring seats through their inner rings, and their outer rings are in linear contact with the bearing contact ring surfaces. This prior art, through the arrangement of bearing ring seats and rolling bearings, solves the technical problem of high precision requirements caused by direct contact surface friction, and the technical difficulty of maintenance and replacement of bearing components due to the tight assembly method caused by precision requirements.

[0004] However, the loud noise during propulsion operation can still be a problem. High noise may mask other potential operational prompts or alarms, affecting operational safety. High noise accompanied by vibration can lead to structural fatigue, premature damage, and increased maintenance costs.

[0005] Therefore, this utility model provides a shaftless electric propulsion device for ships to solve the above problems. Utility Model Content

[0006] This invention provides a shaftless electric propulsion device for ships, which aims to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a shaftless electric propulsion device for ships, comprising a housing, a groove formed on the inner side wall of the housing, a sound-absorbing plate embedded inside the groove, the inner side wall of the sound-absorbing plate being fixedly connected by a connecting plate, and a noise reduction mechanism being fixedly connected to the inner wall of the housing;

[0008] The noise reduction mechanism includes a sleeve, one end of which is fixedly connected to the inner wall of the housing. A connecting sleeve is fixedly connected inside the sleeve. A buffer pad is fixedly connected inside the connecting sleeve by a spring A. A spring B is fixedly connected to the surface of the buffer pad. A telescopic rod is fixedly connected to one end of the spring B. The outer surface of the telescopic rod is slidably connected to the inside of the sleeve.

[0009] As a further optimization, sliding blocks are fixedly connected to both ends of the telescopic rod, and sliding grooves are provided on both sides of the sleeve. The outer surface of the sliding block is slidably connected to the inside of the sliding groove, and a circular hole is provided in the middle of the sliding block. A vertical rod is slidably connected inside the circular hole.

[0010] As a further optimization, a fixing plate is fixedly connected to one end of the upright, and the sliding block is fixedly connected to the fixing plate by a C spring, with the outer surface of the upright penetrating the interior of the C spring.

[0011] As a further optimization, a frame ring is fixedly connected to one end of the telescopic rod, a drive motor is fixedly connected to the inner side wall of the frame ring, a bushing is splined to the output end of the drive motor, and a rotating mechanism is fixedly connected to the upper surface of the bushing.

[0012] As a further optimization, the rotating mechanism includes a hub, the bottom of which is fixedly connected to the upper surface of the bushing, and a propeller blade is snapped onto the outer surface of the hub.

[0013] As a further optimization, the surface of the propeller blade is provided with irregular grooves, and sound-absorbing cotton is embedded inside the irregular grooves.

[0014] As a further optimization, a sponge ring is fixedly connected to the inner top wall of the shell, and a protective net is fixedly connected to the inner side wall of the sponge ring.

[0015] Compared with the prior art, the beneficial effects of this application are as follows:

[0016] 1. With the addition of a silencing mechanism, the propeller blades are driven to rotate by the drive motor when the thruster is working. When the drive motor is working, the silencing mechanism replaces the traditional connecting bracket to connect the drive motor and the housing. The springs and buffer pads inside the silencing mechanism can absorb and buffer the mechanical vibration between the drive motor and the housing, reducing the vibration transmitted to the housing and seawater. The springs provide elastic buffering, reducing the impact and mechanical stress generated during motor operation, and extending the service life of the equipment and structure.

[0017] 2. Through the set rotation mechanism, sound-absorbing cotton is installed on the surface of the propeller blade in the rotation mechanism. The sound-absorbing cotton has excellent sound wave absorption characteristics, which can effectively absorb the noise and vibration generated by the blade operation, reduce the reflection and propagation of sound waves, and can also partially absorb the mechanical vibration generated by the propeller blade when it is running at high speed, thus slowing down the transmission of vibration to the hull and the surrounding water environment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2This is a cross-sectional schematic diagram of the shell of this utility model;

[0020] Figure 3 This is a schematic diagram of the installation of the sound-absorbing cotton of this utility model;

[0021] Figure 4 This is a schematic diagram of the installation of the buffer pad of this utility model;

[0022] Figure 5 This is a structural schematic diagram of the sound-absorbing panel and connecting plate of this utility model;

[0023] Figure 6 This is a schematic diagram of the installation of the drive motor of this utility model.

[0024] In the diagram: 1. Shell; 2. Sound-absorbing panel; 3. Connecting plate; 4. Sleeve; 5. Connecting sleeve; 6. Spring A; 7. Buffer pad; 8. Spring B; 9. Telescopic rod; 10. Sliding block; 11. Upright pole; 12. Fixing plate; 13. Spring C; 14. Frame ring; 15. Drive motor; 16. Bushing; 17. Propeller hub; 18. Propeller blade; 19. Sound-absorbing cotton; 20. Sponge ring; 21. Protective net. Detailed Implementation

[0025] 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.

[0026] like Figures 1 to 6 As shown, a shaftless electric propulsion for ships includes a housing 1. The inner wall of the housing 1 has a groove, and a sound-absorbing plate 2 is embedded inside the groove. The inner wall of the sound-absorbing plate 2 is fixedly connected by a connecting plate 3. A noise reduction mechanism is fixedly connected to the inner wall of the housing 1.

[0027] The silencing mechanism includes a sleeve 4, one end of which is fixedly connected to the inner wall of the housing 1. A connecting sleeve 5 is fixedly connected inside the sleeve 4. A buffer pad 7 is fixedly connected inside the connecting sleeve 5 via a spring A 6. A spring B 8 is fixedly connected to the surface of the buffer pad 7. A telescopic rod 9 is fixedly connected to one end of the spring B 8. The outer surface of the telescopic rod 9 is slidably connected to the inside of the sleeve 4. When the propeller is working, the propeller blade 18 is driven to rotate by the drive motor 15. When the drive motor 15 is working, the silencing mechanism replaces the traditional connecting bracket to connect the drive motor 15 and the housing 1. The spring and buffer pad 7 inside the silencing mechanism can absorb and buffer the mechanical vibration between the drive motor 15 and the housing 1, reducing the vibration transmitted to the housing 1 and the seawater. The spring provides elastic buffering, reducing the impact and mechanical stress generated during motor operation, and extending the service life of the equipment and structure.

[0028] Both ends of the telescopic rod 9 are fixedly connected to sliding blocks 10. Slide grooves are provided on both sides of the sleeve 4. The outer surface of the sliding block 10 is slidably connected to the inside of the slide groove. A circular hole is provided in the middle of the sliding block 10, and a vertical rod 11 is slidably connected inside the circular hole. A fixing plate 12 is fixedly connected to one end of the vertical rod 11. The sliding block 10 and the fixing plate 12 are fixedly connected by a C-spring 13. The outer surface of the vertical rod 11 passes through the inside of the C-spring 13. A frame ring 14 is fixedly connected to one end of the telescopic rod 9. A drive motor 15 is fixedly connected to the inner wall of the frame ring 14. A bushing 16 is splinedly connected to the output end of the drive motor 15. The upper part of the bushing 16... A rotating mechanism is fixedly connected to the surface. When the drive motor 15 rotates, the connection between the drive motor 15 and the housing 1 is composed of a noise reduction mechanism. When the drive motor 15 vibrates, the vibration force is transmitted to the telescopic rod 9. The sliding blocks 10 on both sides of the telescopic rod 9 are pressed onto the fixed plate 12 by the upright rod 11 and the C spring 13. Subsequently, the telescopic rod 9 is pressed onto the buffer pad 7 by the B spring 8. The buffer pad 7 is pressed into the connecting sleeve 5 by the A spring 6, and the vibration force is transmitted into the connecting sleeve 5 and absorbed by the connecting sleeve 5. This can absorb and buffer the mechanical vibration between the drive motor 15 and the housing 1, and reduce the vibration transmitted to the housing 1 and the seawater.

[0029] The rotating mechanism includes a hub 17, the bottom of which is fixedly connected to the upper surface of a bushing 16. A propeller blade 18 is snapped onto the outer surface of the hub 17. A groove is formed on the surface of the propeller blade 18, and sound-absorbing cotton 19 is embedded inside the groove. The hub 17 drives the propeller blade 18 to rotate. When the propeller blade 18 rotates, the sound-absorbing cotton 19 on its surface rotates accordingly. The sound-absorbing cotton 19 has excellent sound wave absorption characteristics and can effectively absorb the noise and vibration generated by the operation of the propeller blade 18, reduce the reflection and propagation of sound waves, and can also partially absorb the mechanical vibration generated by the propeller blade 18 when it is running at high speed, thus slowing down the transmission of vibration to the hull and the surrounding water environment, which helps to achieve a quieting effect.

[0030] A sponge ring 20 is fixedly connected to the inner top wall of the shell 1, and a protective net 21 is fixedly connected to the inner side wall of the sponge ring 20. The protective net 21 can play a protective role, preventing underwater debris from entering the interior of the shell 1, causing the propeller blades 18 to become entangled and affecting normal operation.

[0031] Specifically, when the propeller is working, the sound-absorbing panels 2 are snapped into the inside of the housing 1. Several sound-absorbing panels 2 can be connected together through the connecting plate 3. Then, the drive motor 15 is started. The drive motor 15 drives the rotor hub 17 to rotate through the bushing 16. The rotor hub 17 drives the propeller blades 18 to rotate. When the propeller blades 18 rotate, the sound-absorbing cotton 19 on the surface rotates accordingly. The sound-absorbing cotton 19 has excellent sound wave absorption characteristics and can effectively absorb the noise and vibration generated by the operation of the propeller blades 18, reduce the reflection and propagation of sound waves, and can also partially absorb the mechanical vibration generated by the propeller blades 18 when they are running at high speed, thus slowing down the transmission of vibration to the hull and the surrounding water. The environment is designed to achieve a quiet effect. Subsequently, when the drive motor 15 rotates, the connection between the drive motor 15 and the housing 1 is composed of a noise reduction mechanism. When the drive motor 15 vibrates, the vibration force is transmitted to the telescopic rod 9. The sliding blocks 10 on both sides of the telescopic rod 9 are pressed against the fixed plate 12 by the upright rod 11 and the C spring 13. Subsequently, the telescopic rod 9 is pressed against the buffer pad 7 by the B spring 8. The buffer pad 7 is pressed into the connecting sleeve 5 by the A spring 6, and the vibration force is transmitted into the connecting sleeve 5 and absorbed by the connecting sleeve 5. This can absorb and buffer the mechanical vibration between the drive motor 15 and the housing 1, and reduce the vibration transmitted to the housing 1 and the seawater.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A shaftless electric propulsion device for ships, comprising a housing (1), characterized in that: The inner wall of the housing (1) is provided with a groove, and a sound-absorbing plate (2) is embedded in the groove. The inner wall of the sound-absorbing plate (2) is fixedly connected by a connecting plate (3). A sound-absorbing mechanism is fixedly connected to the inner wall of the housing (1). The silencing mechanism includes a sleeve (4), one end of which is fixedly connected to the inner wall of the housing (1). A connecting sleeve (5) is fixedly connected inside the sleeve (4). A buffer pad (7) is fixedly connected inside the connecting sleeve (5) via a spring A (6). A spring B (8) is fixedly connected to the surface of the buffer pad (7). A telescopic rod (9) is fixedly connected to one end of the spring B (8). The outer surface of the telescopic rod (9) is slidably connected to the inside of the sleeve (4).

2. The shaftless electric propulsion device for ships according to claim 1, characterized in that: Both ends of the telescopic rod (9) are fixedly connected to sliding blocks (10), and both sides of the sleeve (4) are provided with sliding grooves. The outer surface of the sliding block (10) is slidably connected to the inside of the sliding groove. A round hole is provided in the middle of the sliding block (10), and a vertical rod (11) is slidably connected inside the round hole.

3. A shaftless electric propulsion device for ships according to claim 2, characterized in that: One end of the upright (11) is fixedly connected to a fixing plate (12), and the sliding block (10) is fixedly connected to the fixing plate (12) by a C spring (13). The outer surface of the upright (11) passes through the interior of the C spring (13).

4. A shaftless electric propulsion device for ships according to claim 2, characterized in that: One end of the telescopic rod (9) is fixedly connected to a frame ring (14), and a drive motor (15) is fixedly connected to the inner side wall of the frame ring (14). The output end of the drive motor (15) is splinedly connected to a bushing (16), and a rotating mechanism is fixedly connected to the upper surface of the bushing (16).

5. A shaftless electric propulsion device for ships according to claim 4, characterized in that: The rotating mechanism includes a hub (17), the bottom of which is fixedly connected to the upper surface of a bushing (16), and a propeller blade (18) is snapped onto the outer surface of the hub (17).

6. A shaftless electric propulsion device for ships according to claim 5, characterized in that: The surface of the propeller blade (18) is provided with irregular grooves, and sound-absorbing cotton (19) is embedded inside the irregular grooves.

7. A shaftless electric propulsion device for ships according to claim 1, characterized in that: A sponge ring (20) is fixedly connected to the inner top wall of the shell (1), and a protective net (21) is fixedly connected to the inner side wall of the sponge ring (20).

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